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  • stress  (61)
  • Immunohistochemistry
  • Springer  (98)
  • Annual Reviews
  • Blackwell Publishing Ltd
  • 2020-2024
  • 2005-2009
  • 1990-1994  (64)
  • 1980-1984  (34)
  • 1975-1979
  • 1993  (64)
  • 1984  (34)
Collection
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  • 2020-2024
  • 2005-2009
  • 1990-1994  (64)
  • 1980-1984  (34)
  • 1975-1979
Year
  • 1
    Electronic Resource
    Electronic Resource
    Effect of stress, adrenalectomy and changes in glutathione metabolism on rat kidney metallothionein content: comparison with liver metallothionein (1993)
    Springer
    BioMetals 6 (1993), S. 171-178 
    Details
    ISSN: 1572-8773
    Keywords: glucocorticoids ; glutathione ; metallothionein ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Eighteen hours of immobilization stress, accompanied by food and water deprivation, increased liver metallothionein (MT) but decreased kidney MT levels. Food and water deprivation alone had a significant effect only on liver MT levels. In contrast, stress and food and water deprivation increased both liver and kidney lipid peroxidation levels, indicating that the relationship between MT and lipid peroxidation levels (an index of free radical production) is unclear. Adrenalectomy increased both liver and kidney MT levels in basal conditions, whereas the administration of corticosterone in the drinking water completely reversed the effect of adrenalectomy, indicating an inhibitory role of glucocorticoids on MT regulation in both tissues. Changes in glutathione (GSH) metabolism produced significant effects on kidney MT levels. Thus, the administration of buthionine sulfoximine, an inhibitor of GSH synthesis, decreased kidney GSH and increased kidney MT content, suggesting that increased cysteine pools because of decreased GSH synthesis might increase kidney MT levels through an undetermined mechanism as it appears to be the case in the liver. However, attempts to increase kidney MT levels by the administration of cysteine or GSH were unsuccesful, in contrast to what is known for the liver. The present results suggest that there are similarities but also substantial differences between liver and kidney MT regulation in these experimental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00205856
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  • 2
    Electronic Resource
    Electronic Resource
    Occurrence of Chaperonin 60 and Chaperonin 10 in primary and secondary bacterial symbionts of aphids: Implications for the evolution of an endosymbiotic system in aphids (1993)
    Springer
    Journal of molecular evolution 36 (1993), S. 568-577 
    Details
    ISSN: 1432-1432
    Keywords: Aphids ; Endosymbiosis ; Symbionin ; Chaperonin 60 ; Chaperonin 10 ; Immunoblotting ; Immunohistochemistry ; Primary symbiont ; Secondary symbiont ; Endosymbiotic evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary All aphids harbor symbiotrophic prokaryotes (“primary symbionts”) in a specialized-abdominal cell, the bacteriocyte. Chaperonin 60 (Cpn60, symbionin) and chaperonin 10 (Cpn10), which are high and low molecular weight heatshock proteins, were sought in tissues of more than 60 aphid species. The endosymbionts were compared immunologically and histologically. It was demonstrated that (1) there are two types of aphids in terms of the endosymbiotic system: some with only primary symbionts and others with, in addition, secondary symbionts; (2) the primary symbionts of various aphids are quite similar in morphology whereas the secondary symbionts vary; and (3) irrespective of the aphid species, Cpn60 is abundant in both the primary and secondary symbionts, while Cpn10 is abundant in the secondary symbionts but present in small amounts in the primary ones. Based on these results, we suggest that the primary symbionts have been derived from a prokaryote that was acquired by the common ancestor of aphids whereas the secondary symbionts have been acquired by various aphids independently after divergence of the aphid species. In addition, we point out the possibility that the prokaryotes under intracellular conditions have been subject to some common evolutionary pressures, and as a result, have come to resemble cell organelles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00556361
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  • 3
    Electronic Resource
    Electronic Resource
    Improvements to Griggs-type apparatus for mechanical testing at high pressures and temperatures (1993)
    Springer
    Pure and applied geophysics 141 (1993), S. 523-543 
    Details
    ISSN: 1420-9136
    Keywords: Pressure ; temperature ; stress ; measurement ; acoustic emissions ; deformation ; techniques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract New and improved techniques and apparatus for testing the mechanical properties of materials at high presures and temperatures are described. These include an improved Griggs-type deformation apparatus designed to operate to 5 GPa and associated servo-controlled hydraulic drive and electronics, the design of hydrostatic (molten alkali halide mixtures) pressure assemblies to measure flow stresses as low as a few MPa, the characterization of temperature gradients and friction in such assemblies, measurement of the melting curve of an alkali halide mixture used as a confining pressure medium, and the measurement of acoustic emissions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00998344
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  • 4
    Electronic Resource
    Electronic Resource
    Persistent inverse maternal effect on corticosterone production in vitro (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 1000-1001 
    Details
    ISSN: 1420-9071
    Keywords: Adrenals ; corticosterone ; maternal effects ; stress ; inbred strains ; mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Adrenal cells from C57BL/Tb mice produced more steroid than those from DBA/2J mice. Reciprocal differences between both backcross and F1 hybrids showed a persistent maternal effect. Mothers with high output produce offspring with reduced hormone production when adult. Corticosterone output thus depends on maternal phenotype as well as on the genotype of the isolated cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946479
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  • 5
    Electronic Resource
    Electronic Resource
    Suppression of the immune response by drugs interfering with the metabolism of serotonin (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 1153-1155 
    Details
    ISSN: 1420-9071
    Keywords: Rat plasma ; plasma, rat ; immune response ; stress ; immunosuppressive drugs ; serotonin, brain ; corticosterone, plasma ; plaque-forming cell response
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The work was based on the assumption that neurohumoral control of the immune response, particularly in stressed animals, involves central serotoninergic mechanisms. Rats immunized with sheep erythrocytes were stressed by repeated restraints and/or treated with a precursor of serotonin (5-hydroxytryptophan, 5-HTP) or with an inhibitor of serotonin synthesis (parachlorophenylalanine, PCPA). As expected, repeated stresses reduced the plaque-forming cell (PFC) response. Treatment with 5-HTP also reduced the PFC response, and potentiated the immunosuppressive effect of stress. This was accompanied by increased metabolism of serotonin in the brain, as indicated by increased concentration of its metabolite, 5-hydroxyindoleacetic acid (5-HIAA), in cerebral tissue. Treatment with PCPA also suppressed the PFC response, but this suppression was accompanied by decreased levels of brain serotonin and of 5-HIAA. Plasma corticosterone levels were elevated in rats treated with PCPA. It seems that putative central effects of PCPA on serotoninergic regulation of the immune response were outweighed by its effects on corticosterone secretion and/or on lymphoid cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01971469
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  • 6
    Electronic Resource
    Electronic Resource
    Immunohistochemical study on the morphology of enterochromaffin cells in the human fundic mucosa (1984)
    Springer
    Cell & tissue research 235 (1984), S. 703-705 
    Details
    ISSN: 1432-0878
    Keywords: Enterochromaffin cells ; Serotonin ; Immunohistochemistry ; Man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The morphology of enterochromaffin (EC) cells in the human fundic mucosa was investigated at the lightmicroscopic level by means of the unlabeled peroxidase anti-peroxidase method, with the use of a highly specific anti-serotonin serum. EC-cells in the human fundic mucosa were sparsely distributed below the neck portion of the gland, but were found to be rather numerous in its lower half. Immunohistochemistry revealed marked pleomorphic and seemingly polynuclear EC-cells or cells with long, sometimes multipolar cytoplasmic processes. In addition, luminal contacts and contiguity between EC-cells, or interglandular connections were also encountered. The present immunohistochemical procedure permits, for the first time, a clear-cut morphological visualization of the entire population of EC-cells, and reveals the distinctive morphological features of these cells in the human fundic mucosa. These morphological findings imply that EC-cells in the fundic mucosa may be crucial in gastric function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226973
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  • 7
    Electronic Resource
    Electronic Resource
    Catecholamine-containing pancreatic islet cells of the domestic fowl (1984)
    Springer
    Cell & tissue research 237 (1984), S. 239-244 
    Details
    ISSN: 1432-0878
    Keywords: Islet A cell ; Catecholamine ; Combined microscopy ; Immunohistochemistry ; Fowl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In an attempt to identify pancreatic islet cells emitting formaldehyde-induced fluorescence (FIF), the pancreatic islets of the domestic fowl were studied by combined fluorescence, ultrastructural, silver-impregnation and immunohistochemical methods in the same section or in consecutive semi-thin and ultra-thin sections. The results indicate that islet cells emitting intense FIF exhibit a strongly argyrophil reaction with the Grimelius' silver method and also immunohistochemical reaction with anti-glucagon serum, but not with anti-5-HT serum. Therefore, the fowl islet A cell, a peptide hormone-producing cell, stores simultaneously catecholamine as biogenic amine. The islet B and D cells did not display any FIF, any argyrophil reaction with the Grimelius' silver method, or any immunoreactivity with anti-glucagon or anti-5-HT sera. The fluorescent but non-argyrophil cells dispersed in the exocrine acinus may well be PP cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217141
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  • 8
    Electronic Resource
    Electronic Resource
    Serotonin and opsin immunoreactivities in the developing pineal organ of the three-spined stickleback, Gasterosteus aculeatus L. (1984)
    Springer
    Cell & tissue research 237 (1984), S. 559-564 
    Details
    ISSN: 1432-0878
    Keywords: Pineal complex (pineal and parapineal organs) ; Development, ontogenetic ; Photoreceptor cells ; Immunohistochemistry ; Serotonin (5-HT) ; Opsin ; Teleost (Gasterosteus aculeatus)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 5-hydroxytryptamine (5-HT, serotonin)- and opsin-immunoreactive sites were studied in the developing pineal complex of the stickleback, Gasterosteus aculeatus L., by use of light-microscopic indirect immunoperoxidase techniques. 5-HT immunoreactivity first occurs in the pineal organ at the age of 80 h after fertilization and appears to be localized in cells of the photoreceptor type. The outer segments of a few pineal photosensory cells exhibit opsin immunoreactivity at the age of 84 h after fertilization. The number of cells seems to increase until the pineal organ is completely developed. The increase in the number of 5-HT immunoreactive perikarya runs parallel in time to that of the opsinimmunoreactive outer segments. The cells of the parapineal organ show neither opsin nor 5-HT immunoreactivity. The retina of the embryonic stickleback does not display opsin immunoreactivity until after hatching, which takes place about 144 h after fertilization. These results suggest, in the three-spined stickleback, an earlier light-perception capacity for the developing pineal organ than for the retina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00228440
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  • 9
    Electronic Resource
    Electronic Resource
    Ontogeny of endocrine cells in the gut of the insect Periplaneta americana (1984)
    Springer
    Cell & tissue research 238 (1984), S. 421-423 
    Details
    ISSN: 1432-0878
    Keywords: Gut endocrine cells ; Ontogeny ; Immunohistochemistry ; Pancreatic polypeptide ; Insect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ontogeny of the endocrine cells of the gut of the cockroach Periplaneta americana was studied by immunohistochemistry. During embryogenesis, the midgut begins to be formed as an outgrowth of the foregut and hindgut invaginations. Gut endocrine cells with pancreatic polypeptide (PP)-like immunoreactivity begin to appear at the anterior and posterior ends of the forming midgut. These cells are restricted to the midgut epithelium, and no mitotic cells with PP-like immunoreactivity are observed. These results strongly suggest that the gut endocrine cells, at least those with PP-like immunoreactivity, are derived from precursor cells they have in common with other epithelial cells of the midgut.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217318
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  • 10
    Electronic Resource
    Electronic Resource
    Immunohistochemistry and nerve lesion experiments on the methionine-enkephalin immunopositive neurons in the small intestine of the bullfrog (Rana catesbeiana) (1993)
    Springer
    Cell & tissue research 271 (1993), S. 93-102 
    Details
    ISSN: 1432-0878
    Keywords: Met-enkephalin ; Immunohistochemistry ; Intestine, small ; Neuron, enteric ; Laser microsurgery ; Rana catesbeiana (Anura)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Nerve elements in the small intestine of the bullfrog. Rana catesbeiana, were studied by immunohistochemistry with anti-methionine enkephalin antisera and by nerve lesion experiments, using laser irradiation. Methionine-enkephalin immunopositive nerve fibers occur in the myenteric plexus, circular muscle layer, submucosa, and mucosa. Immunopositive nerve cell bodies in the myenteric plexus have dendrite-like and a long axon-like processes. In the froglet (3 months after metamorphosis), these axon-like processes lead posteriorly in the nerve strand of the myenteric plexus. Some bifurcate, one branch continuing posteriorly, the other doubling back to lead anteriorly; both form terminal varicose fibers in the circular muscle layer. Nerve lesion experiments, in the adult bullfrog, resulted in accumulations of methionine-enkephalin immunoreactivity at the oral and hinder edges of the laser-irradiated necrotic area; there were sprouting and nonsprouting immunopositive stumps. It is suggested that bidirectional flow of methionine-enkephalin in the myenteric plexus is mediated via the anterior and posterior branches of the axon-like process. The difference in sprouting behavior of immunopositive nerve fiber stumps, after nerve lesion, is discussed with reference to regional differences of the axon-like process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297546
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  • 11
    Electronic Resource
    Electronic Resource
    Organization of histamine-containing neurons in the brain of the crested newt, Triturus carnifex (1993)
    Springer
    Cell & tissue research 272 (1993), S. 147-154 
    Details
    ISSN: 1432-0878
    Keywords: Histamine ; Immunohistochemistry ; Brain, vertebrate ; Catecholamines ; Triturus carnifex (Urodela)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The distribution of immunoreactivity for histamine was studied in the brain of the urodele Triturus carnifex using the indirect immunofluorescence method. Histamine-immunoreactive cell bodies were localized in the caudal hypothalamus within the dorsolateral walls of the infundibular recesses. These immunoreactive cell bodies were pear-shaped, bipolar and frequently of the cerebrospinal-fluid-contacting type. Histaminergic nerve fibers were detected in almost all parts of the brain. Dense innervation was seen in the telencephalic medial pallium and ventral striatum, the neuropil of the preoptic area, the septum, the paraventricular organ, the posterior commissure, the caudal hypothalamus, the ventral and lateral mesencephalic tegmentum. Medium density innervation was observed in the lateral mesencephalic tegmentum and optic tectum. Poor innervation was present in the telencephalic dorsal pallium and in the central gray of the medulla oblongata. Few fibers occurred in the olfactory bulbs and in the telencephalic lateral pallium. Double immunofluorescence staining, using an antibody against tyrosine hydroxylase, showed that histamine-immunostained somata and those containing tyrosine-hydroxylase-like immunoreactivity were co-distributed in the tuberal hypothalamus. No co-occurrence of histamine-like and tyrosine hydroxylase-like immunostaining was seen in the same neuron. The pattern of histamine-immunoreactive neurons in the newt was similar to that described in other vertebrates. Our observations, carried out on the apparently simplified brain of the newt confirm that the basic histaminergic system is well conserved throughout vertebrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323580
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  • 12
    Electronic Resource
    Electronic Resource
    The distribution and colocalization of neuropeptides and 5-hydroxytryptamine in pelvic nerves supplying the posterior large intestine of the toad, Bufo marinus (1993)
    Springer
    Cell & tissue research 274 (1993), S. 105-114 
    Details
    ISSN: 1432-0878
    Keywords: Immunohistochemistry ; Pelvic nerves ; Neuropeptides ; Large intestine ; Bufo marinus (Anura)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The distribution and colocalization of neuropeptides and 5-hydroxytryptamine in the posterior portion of the large intestine of the toad was studied using single- and dual-label immunohistochemistry. Neurons containing colocalized galanin/somatostatin or vasoactive intestinal peptide alone were observed along intramural pelvic nerves. Some of the galanin/somatostatin neurons also contained 5-hydroxytryptamine. Synaptic boutons containing colocalized calcitonin gene-related peptide/vasoactive intestinal peptide were associated with the galanin/somatostatin neurons. The muscle of the large intestine was also innervated by axons containing galamin/somatostatin, vasoactive intestinal peptide/calcitonin gene-related peptide or vasoactive intestinal peptide alone. Nerve fibres containing calcitonin gene-related peptide/substance P, probably representing primary afferent nerves, were also associated with muscle bundles. Submucosal blood vessels carried dense plexuses of fibres containing vasoactive intestinal peptide alone or and calcitonin gene-related peptide/substance P. Adrenergic perivascular nerves also contained galanin and neuropeptide Y.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327991
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  • 13
    Electronic Resource
    Electronic Resource
    Basic fibroblast growth factor in rat salivary glands (1993)
    Springer
    Cell & tissue research 273 (1993), S. 467-474 
    Details
    ISSN: 1432-0878
    Keywords: Basic fibroblast growth factor ; Salivary glands ; Cell growth assay ; Immunohistochemistry ; Radioimmunoassay ; Rat (Wistar)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We studied the occurrence and localization of basic fibroblast growth factor (bFGF) in rat salivary glands using a specific monoclonal antibody. It was shown that the extract of rat salivary glands has a pronounced stimulatory activity on the growth of bovine capillary endothelial cells, which is blocked by the addition of an antibody against bFGF. The concentration of bFGF in the submandibular/sublingual gland, as determined by radioimmunoassay, was ∼80% that in the brain. Immunocytochemistry revealed bFGF-immunoreactivity localized primarily in the epithelial cells lining the striated ducts and excretory ducts of the parotid, sublingual and submandibular glands. In addition, intense bFGF-immunoreactivity was observed in the granular convoluted tubule of the submandibular gland, localized predominantly in the agranular pillar cells, which lay in small numbers among the majority of weakly immunostained cells containing many apical secretory granules. At the electron-microscopic level, the immunoreactive material was distributed diffusely in the cytoplasmic matrix and nuclei of all immunoreactive cells, whereas it was absent from all cytoplasmic organelles including the secretory granules. These results indicate that bFGF is localized in different cellular and subcellular compartments from those of other growth factors in the duct system of rat salivary glands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00333701
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  • 14
    Electronic Resource
    Electronic Resource
    Co-localization of peptides in the Brockmann bodies of the cod (Gadus morhua) and the rainbow trout (Oncorhynchus mykiss) (1993)
    Springer
    Cell & tissue research 273 (1993), S. 547-555 
    Details
    ISSN: 1432-0878
    Keywords: Pancreas, endocrine ; Immunohistochemistry ; Neuropeptide Y ; Peptide YY ; FMRFamide ; LPLRFamide ; Vasoactive intestinal polypeptide (VIP) ; Oncorhynchus mykiss (Teleostei) ; Gadus morhua (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Endocrine cells exhibiting immunoreactivity to FMRFamide-like, LPLRFamide-like, neuropeptide Y(NPY)-like and peptide YY(PYY)-like peptides were found in the periphery of the Brockmann bodies of the cod, Gadus morhua, and rainbow trout, Oncorhynchus mykiss. No immunoreactivity or very weak labelling was found with antisera to pancreatic polypeptide (PP). Vasoactive intestinal polypeptide (VIP)-like immunoreactivity was found in nerve fibres, whereas labelling with VIP antiserum in endocrine cells disappeared after preincubation with nonimmune serum. There were always more immunoreactive cells in the rainbow trout than in the cod. No immunoreactivity could be seen with antisera to gastrin/cholecystokinin (CCK) or enkephalin. Double-labelling studies were performed to study the colocalization of the peptides in peripheral endocrine cells. Cells immunoreactive to NPY were also labelled with antisera to FMRFamide, LPLRFamide and PYY. The co-localization pattern of NPY varied; in some Brockmann bodies, a population of the immunoreactive cells showed co-localization and others contained NPY-like immunoreactivity only, whereas in other Brockmann bodies, all NPY-labelled cells also contained FMRFamide-like, LPLRFamide-like and PYY-like immunoreactivity. Cells immunoreactive to PYY similarly contained FMRFamide-like, LPLRFamide-like and NPY-like immunoreactivity, comparable to the patterns observed with NPY. Glucagon-like immunoreactivity was found at the periphery of the Brockmann bodies. A subpopulation of the glucagon-containing cells contained NPY-like immunoreactivity. PYY-like immunoreactivity was also found co-localized with glucagon-like immunoreactivity, as were FMRFamide-like and LPLRFamide-like immunoreactivity. Therefore, either NPY-like and PYY-like immunoreactivity together with FMRFamide-like and LPLRFamide-like immunoreactivity occur in the same endocrine cells of the Brockmann body of the cod and rainbow trout, or a hybrid NPY/PYY-like peptide recognized by both NPY and PYY antisera is present in the Brockmann body.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00333708
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  • 15
    Electronic Resource
    Electronic Resource
    Distribution of neuropeptides in the porcine stellate ganglion (1993)
    Springer
    Cell & tissue research 274 (1993), S. 181-187 
    Details
    ISSN: 1432-0878
    Keywords: Neuropeptides ; Stellate ganglion ; Immunohistochemistry ; Pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The localization and distribution of neuropeptides including neuropeptide Y (NPY), [Met5]enkephalin-Arg6-Gly7-Leu8 (MEAGL), vasoactive intestinal polypeptide (VIP), calcitonin gene-related peptide (CGRP), substance P and somatostatin (SOM) were analyzed in the stellate ganglion of the pig by use of the indirect immunofluorescence technique. NPY, MEAGL, SOM, VIP and CGRP immunoreactivities were found to exist in subpopulations of neuronal cell bodies of the stellate ganglion. A population of the small intensely fluorescent (SIF) cells showed MEAGL immunoreactivity. In addition, the presence of NPY-, MEAGL-, CGRP-, SP-, SOM- and VIP-immunoreactive nerve fibers and axonal varicosities were observed in the stellate ganglion. The localization and pattern of distribution of these peptides in the porcine stellate ganglion were compared with studies carried out on stellate ganglia of other mammalian species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327999
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  • 16
    Electronic Resource
    Electronic Resource
    Mitotic activity of prolactin cells in the pituitary glands of male and female rats of different ages (1984)
    Springer
    Cell & tissue research 235 (1984), S. 497-502 
    Details
    ISSN: 1432-0878
    Keywords: Prolactin cell ; Mitosis ; Sex difference ; Aging ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The anterior pituitary of colchicine-pretreated male and female rats from 20 days to 12 months of age was stained immunohistochemically with anti-rat prolactin serum. Immunoreactive mitotic cells were identified in all groups of rats. In adult female rats the mitotic index of prolactin cells was higher at oestrus than at other stages of the oestrus cycle and than that in male rats of comparable ages. If adult female rats were ovariectomized on the second day of dioestrus or on the day of proestrus, the mitotic indices at presumptive oestrus were less than those in sham-operated controls at oestrus. Estrogen administration to ovariectomized rats significantly elevated the mitotic index of prolactin cells at 48 h after the treatment. The mitotic indices of prolactin cells in female rats reached a peak at 60 days of age, and then decreased with age. In male rats the mitotic indices showed a steady decrease from the value at 20 days of age. A sex difference in the mitotic indices of prolactin cells was noted from 60 days to 12 months of age. The present results clearly demonstrate that differentiated prolactin cells can undergo mitosis and that a sex difference in the mitotic activity of prolactin cells is present during adult life.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226945
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  • 17
    Electronic Resource
    Electronic Resource
    Immunohistochemical demonstration of serotonin-containing nerve fibers in the hypothalamus of the monkey, Macaca fuscata (1984)
    Springer
    Cell & tissue research 236 (1984), S. 495-503 
    Details
    ISSN: 1432-0878
    Keywords: Hypothalamus ; Serotonin ; Neuroendocrine regulation ; Monkey (Macaca fuscata) ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The distributional pattern of serotonin-containing nerve fibers in the hypothalamus of the monkey (Macaca fuscata) was analyzed with the use of the peroxidaseantiperoxidase method in conjunction with a highly sensitive and specific anti-serotonin serum. The highest concentrations of serotonin-immunoreactive varicose fibers were found in the nucleus praeopticus medialis, nucleus ventromedialis hypothalami, and the complex of mammillary nuclei (nucleus praemamillaris, supramamillaris, mamillaris medialis et lateralis). However, the nucleus suprachiasmaticus, where numerous serotoninergic fibers have been reported to occur in the rat, appeared to be almost devoid of these fibers. The infundibular stalk, and the intermediate and posterior lobes of the pituitary contained considerable numbers of immunoreactive fibers. The present study provides a morphological basis for possible clarification of the influence of serotoninergic projections on various neuroendocrine mechanisms in primates. Furthermore, an attempt was made to clarify the differences and similarities concerning the distributional patterns of serotoninergic nerve fibers within the monkey hypothalamus in contrast to the rat hypothalamus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217216
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  • 18
    Electronic Resource
    Electronic Resource
    Sustentacular cells in the fetal human adrenal medulla are immunoreactive with antibodies to brain S-100 protein (1984)
    Springer
    Cell & tissue research 236 (1984), S. 733-735 
    Details
    ISSN: 1432-0878
    Keywords: S-100 protein ; Adrenal medulla ; Sustentacular cells ; Human fetus ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Adrenal glands of human fetuses were investigated by means of an immunohistochemical method with the use of an anti-S-100 serum. S-100-immunoreactivity was recognized in sustentacular cells located among the chromaffin cells. A characteristic circular arrangement of the immunostained cells was found in the central region of the adrenal glands. It surrounded aggregations of non-argyrophilic, small, round cells, which were identified as the remaining sympathoblasts (primitive sympathetic cells).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217246
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  • 19
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    Catecholamine-synthesizing enzymes in paraganglia of aged Fischer-344 rats (1984)
    Springer
    Cell & tissue research 238 (1984), S. 217-220 
    Details
    ISSN: 1432-0878
    Keywords: Immunohistochemistry ; Paraganglia ; Aging ; Catecholamines ; Catecholamine-synthesizing enzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The catecholamine-synthesizing enzymes, tyrosine hydroxylase, dopamine-β-hydroxylase and phenylethanolamine-N-methyltransferase were examined by immunohistochemistry in hypertrophied paraganglia of aged male Fischer-344 rats. All paraganglionic cells reacted with antibodies against tyrosine hydroxylase. Dopamine β-hydroxylase was identified in most paraganglionic cells, indicating that they synthesized norepinephrine. A variable number of paraganglia were positive for phenylethanolamine-N-methyltransferase, which suggested that they synthesized epinephrine. The formaldehyde-induced fluorescence method demonstrated greenish-yellow fluorescence or yellowish-brown fluorescence. The intensity of the fluorescence was in the same range as in adrenal medullary cells. The observations indicate that paraganglia are capable of synthesizing epinephrine.
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    URL: http://dx.doi.org/10.1007/BF00217291
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    Neuropeptides in the intestine of two teleost species (Oreochromis mossambicus, Carassius auratus): Localization and electrophysiological effects on the epithelium (1993)
    Springer
    Cell & tissue research 271 (1993), S. 123-134 
    Details
    ISSN: 1432-0878
    Keywords: Vasoactive intestinal polypeptide ; Neuropeptide Y ; Enkephalin ; Calcitonin gene-related peptide ; Galanin ; Immunohistochemistry ; Enteric nervous system ; Oreochromis mossambicus, Carassius auratus (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The presence of bioactive peptides in the gut and their possible electrophysiological effects on the intestinal epithelium were studied in two teleost species, the tilapia (Oreochromis mossambicus) and the goldfish (Carassius auratus). Vasoactive intestinal polypeptide-like immunoreactive nerve fibres were found beneath the intestinal epithelium of both species. Galanin-, metenkephalin-and calcitonin gene-related peptide-like immunoreactive nerve fibres were found exclusively in the mucosa of the tilapia. Both species had vasoactive intestinal polypeptide-, enkephalin- or neuropeptide Y-like immunoreactive endocrine cells; calcitonin gene-related peptide-like immunoreactive endocrine cells were additionally found in the tilapia. Somatostatin- and dopamine-β-hydroxylase-like immunoreactivities were not observed. Nerve cell bodies in the myenteric plexus of both species showed immunoreactivity for calcitonin gene-related peptide-, vasoactive intestinal polypeptide-, and galanin-like peptide. Enkephalin-like immunoreactive nerve cell bodies were present in the tilapia only. None of the peptides had a pronounced electrogenic effect. However, calcitonin gene-related peptide added to stripped intestinal epithelium of the tilapia, reduced the ion selectivity, and addition of galanin increased the ion selectivity. In goldfish intestine, both galanin and calcitonin gene-related peptide were without effect. Enkephalin counteracted the serotonin-induced reduction of the ion selectivity of the goldfish intestinal epithelium, but had no effect on the tilapia epithelium. In both species, vasoactive intestinal polypeptide reduced the ion selectivity of the intestinal epithelium, and neuropeptide Y induced an increase of the ion selectivity. Somatostatin showed no effect on the epithelial ion selectivity of either species. Tetrodotoxin did not inhibit the effects of the peptides studied. The changes in ion selectivity suggest that the enterocytes may be under the regulatory control of these peptides.
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    URL: http://dx.doi.org/10.1007/BF00297550
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    Immunohistochemical localization of neuropeptide Y-like substance in the brain and hypophysis of the brown hagfish, Paramyxine atami (1993)
    Springer
    Cell & tissue research 271 (1993), S. 289-295 
    Details
    ISSN: 1432-0878
    Keywords: Neuropeptide Y ; Brain, vertebrate ; Hypothalamus ; Pituitary gland, pars nervosa ; Immunohistochemistry ; Paramyxine atami (Cyclostomato)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The distribution of neuropeptide Y-like immunoreactivity in the brain and hypophysis of the brown hagfish, Paramyxine atami, was examined by use of the peroxidase-antiperoxidase method. Immunoreactive cells were found in two areas of the brain, the nucleus hypothalamicus of the diencephalon and the ventrolateral area of the caudal tegmentum, at the level of the nucleus motorius V–VII. The labeled cells of the nucleus hypothalamicus were loosely grouped and recognized as bipolar neurons. Immunolabeled fibers were widely distributed in the brain, showing the highest density in the diencephalon. They were sparse, or absent, in the olfactory bulb, habenula, primordium hippocampi, neurohypophysis, corpus interpedunculare, and dorsolateral area of the medulla oblongata. The fibers appeared to project exclusively from the ventral hypothalamus to various other portions of the brain: the anterolateral areas of the telencephalon via the basal hypothalamus, the pars dorsalis thalami, the dorsocaudal region of the mesencephalon, and the ventromedial portions of the tegmentum and anterior medulla oblongata. These findings suggest that, in the brown hagfish, NPY-like substance is involved in neuroregulation of various cerebral areas, but it may be of little significance in the control of pituitary function.
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    URL: http://dx.doi.org/10.1007/BF00318615
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    Development of the caudal neurosecretory system of the chum salmon, Oncorhynchus keta, as revealed by immunohistochemistry for urotensins I and II (1993)
    Springer
    Cell & tissue research 272 (1993), S. 221-226 
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    ISSN: 1432-0878
    Keywords: Caudal neurosecretory system ; Urophysis ; Urotensins ; Immunohistochemistry ; Development, ontogenetic ; Oncorhynchus keta (Teleostei)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In order to make an immunohistochemical analysis of the development of the caudal neurosecretory system of the chum salmon, Oncorhynchus keta, we employed the peroxidase-anti-peroxidase technique using antisera specific for urotensins (U) I and II on artificially reared embryos, larvae, and juveniles of this species. Immunoreactivities for UI and UII were first demonstrated in the embryo immediately before hatching, showing labeled perikarya and fibers in the most caudal region of the spinal cord where the presumptive caudal neurosecretory system is located. However, distinct differentiation of the histological neurohemal organ had not yet begun in the embryo. Immunoreactive perikarya and fibers gradually increased in number, and an elaborate urophysis comparable to that of adults was demonstrated in the larvae about 5 months after hatching. At this stage, weak immunoreactivity against UI was detected in the neurohypophysis.
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    Reticulum cells in the ontogeny of nasal-associated lymphoid tissue (NALT) in the rat (1993)
    Springer
    Cell & tissue research 273 (1993), S. 577-581 
    Details
    ISSN: 1432-0878
    Keywords: Nasal-associated lymphoid tissue ; Reticulam cells ; Immunohistochemistry ; Rat (Wistar, Brown-Norway)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract This study concerns the ontogeny of reticulum cells (RC) in the nasal-associated lymphoid tissue (NALT) of Wistar and Brown-Norway rats. A panel of monoclonal antibodies (mAb) directed against RC in peripheral lymphoid organs (antibodies ED10≈ED15) was used, together with a recently developed antibody ED17, which recognizes macrophages and Langerhans cells. Early in embryogenesis, staining with common connective tissue markers, ED14 and ED15, was found. ED17-positive cells were present before cells positive to ED1, a pan-macrophage marker, or Ia glycoproteins were observed. The first differentiation of reticulum was seen at the day of birth, when ED10 recognized a distinct area in the nasal mucosa. The first T-lymphocytes were found at the same time. Two days after birth, B-cells and ED11-positive cells were present in the NALT area. Fourteen days after birth, T- and B-cell compartments were recognizable. ED10 was found predominantly in the T-cell area and ED11 was mainly confined to the B-cell compartment. We conclude that the development of the NALT is closely accompanied by the phenotypic specialization of the reticulum. This suggests that the reticulum plays an important role in the compartmentalization of NALT tissue and in the retention of lymphocyte subsets within these compartments.
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    URL: http://dx.doi.org/10.1007/BF00333711
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    Mouse adrenal chromaffin cells can transform to neuron-like cholinergic phenotypes after being grafted into the brain (1993)
    Springer
    Cell & tissue research 274 (1993), S. 199-205 
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    ISSN: 1432-0878
    Keywords: Adrenal medulla ; Grafts ; Cholinergic immunophenotype ; Hippocampus ; Immunohistochemistry ; Mouse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The development of neuron-like cholinergic immunophenotypes by adrenal chromaffin cells was studied in 10-week-old mouse adrenal medullary grafts. Fragments of chromaffin tissue were implanted into mouse hippocampus, and antibodies specific for neurofilaments (NF), neuron-specific enolase (NSE), choline acetyltransferase (ChAT), acetylcholinesterase (AChE), and phenylethanolamine-N-methyltransferase (PNMT) were applied to the grafts. Adrenal medulla grafts survived well and most of the transplanted cells were either round or polygonal. A minority of chromaffin cells elaborated an intermediate or sympathetic neuron phenotype. Chromaffin cells showed pronounced immunoreactivity for NSE in their perikarya and axon-like processes: immunoreactivity for NF was only found in a few processes. In adjacent immunohistochemically stained sections, the transplanted cells stained for ChAT and AChE. At the electron-microscope level, the immunohistochemical reactions for the two acetylcholine-related enzymes were mainly located on the endoplasmic reticulum and in cell processes. Immunoreactivity for PNMT was found to decline in transplanted chromaffin cells below that of normal adrenal medulla. These observations suggest that, in adrenal medullary grafts implanted into the hippocampus, chromaffin cells are endowed with neuron-like cholinergic immunophenotypes.
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    URL: http://dx.doi.org/10.1007/BF00328001
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    Immunohistochemical evidence for the heterogeneity of maternal and fetal vascular endothelial cells in human full-term placenta (1993)
    Springer
    Cell & tissue research 274 (1993), S. 211-218 
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    ISSN: 1432-0878
    Keywords: Umbilical cord ; Placenta ; Basal plate ; Endothelial cells ; Immunohistochemistry ; Lectins ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The heterogeneity of endothelial cell surface antigen expression was studied in 5 human full-term placentae by means of indirect immunohistochemistry using 9 monoclonal antibodies and by staining with fluorescent-conjugated Ulex europaeus lectin, both of which are widely used endothelial cell markers. (1) A highly specific, homogeneous staining of fetal and maternal placental vessels of all sizes and anatomical regions was observed by the monoclonal antibodies PAL-E, QBEND10 and 1F10. These antibodies were even more specific than Ulex europaeus lectin, factor VIII antibody and von Willebrand factor antibody, which cross-reacted with some non-endothelial cells and structures. The reactivity of PAL-E, QBEND10 and 1F10 with residual surface cells of the basal plate strongly suggests an endothelial origin of these cells. (2) In contrast to other organs, PAL-E, QBEND10 and HM 15/3 strongly stained endothelial cells of the macrovascular system in the human placenta. This might indicate an organ-associated heterogeneity of fetal endothelial cells. (3) Monoclonal antibodies against receptors for transferrin and IgG (FcγRII) labeled the endothelial cells of fetal placental vessels with increasing intensity distal to the insertion of the umbilical cord. The vessels of the umbilical cord itself were unreactive. This might suggest a heterogeneity of macro- and microvascular endothelial cells.
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    Histamine is a major mechanosensory neurotransmitter candidate in Drosophila melanogaster (1993)
    Springer
    Cell & tissue research 273 (1993), S. 119-125 
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    ISSN: 1432-0878
    Keywords: Insect neryous system ; Histamine ; Neurotransmitter ; Immunohistochemistry ; Mechanosensory receptors ; Drosophila melanogaster, Musca domestica (Insecta)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Histamine is known to be the neurotransmitter of insect photoreceptors. Histamine-like immunoreactivity is also found in a number of interneurons in the central nervous system of various insects. Here, we demonstrate by immunohistochemical techniques that, in Drosophila melanogaster (Acalypterae), most or all mechanosensory neurons of imaginal hair sensilla selectively bind antibodies directed against histamine. The histamine-like staining includes the cell bodies of these neurons as well as their axons, which form prominent fibre bundles in peripheral nerves, and their terminal projections in the central neuropil of head and thoracic ganglia. The specificity of the immunostaining is demonstrated by investigating a Drosophila mutant unable to synthesize histamine. Other mechanosensory organs, such as campaniform sensilla or scolopidial organs, do not stain. In the calypteran flies, Musca and Calliphora, we find no comparable immunoreactivity associated with either hair sensilla or the nerves entering the central nervous system, observations in agreement with earlier studies on Calliphora. Thus, histamine seems to be a major mechanosensory transmitter candidate of the adult nervous system of Drosophila, but apparently not of Musca or Calliphora.
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    URL: http://dx.doi.org/10.1007/BF00304618
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    The suprachiasmatic nucleus of the mink (Mustela vison): apparent absence of vasopressin-immunoreactive neurons (1993)
    Springer
    Cell & tissue research 273 (1993), S. 239-247 
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    ISSN: 1432-0878
    Keywords: Vasopressin ; Neurophysin ; Vasoactive intestinal peptide (VIP) ; Immunohistochemistry ; Suprachiasmatic nucleus ; Hypothalamus ; Circadian Rhythms ; Mink Mustela vison (Carnivora) ; Rat (Wistar) ; Golden hamster Mesocricetus auratus ; Mongolian gerbil, Meriones unguiculatus Rodentia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The hypothalamic suprachiasmatic nucleus is centrally involved in generation of several circadian rhythms. Neurons of the mammalian suprachiasmatic nucleus express a number of neuropeptides including vasopressin. The suprachiasmatic nucleus of the mink (Mustela vison) is easily distinguished from neighbouring hypothalamic areas and the underlying optic chiasm as a small nucleus containing densely packed parvocellular neurons. A dorsal and ventral subdivision were clearly recognized within the midportion and caudal part of the nuclcus. Using immunohistochemistry, we have identified vasopressin-, neurophysin-, and vasoactive intestinal peptide-immunoreactive neuronal elements in the hypothalamus of the mink. Vasoactive intestinal peptide-immunoreactive neurons can be observed in the ventral aspect of the suprachiasmatic nucleus, but to our surprise, no vasopressin immunoreactive perikarya are found within the suprachiasmatic nucleus, this absence being independent of the experienced annual cycle. The hypothalamic paraventricular and supraoptic nuclei contain large numbers of vasopressin-, neurophysin-and vasoactive intestinal peptide-immunoreactive magnocellular neurons with extensive projections towards the infundibulum and neurohypophysis. A comparative analysis of the distribution of vasopressin-immunoreactive elements in a number of conventional laboratory animals has demonstrated that, in contrast to the rat, golden hamster and Mongolian gerbil, neither vasopressin-containing perikarya in the suprachiasmatic nucleus nor fine calibered immunoreactive fibres entering the adjacent subparaventricular zone are present in the mink. The mink is a photodependent seasonal breeder, and thus vasopressin-immunoreactive neurons in the suprachiasmatic nuclei may not be essential for the photoperiodic regulation of reproduction and seasonal events experienced by this species.
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    URL: http://dx.doi.org/10.1007/BF00312825
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    Monoclonal antibodies against spermatozoa of the common carp (Cyprinus carpio L.) (1984)
    Springer
    Cell & tissue research 236 (1984), S. 99-105 
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    ISSN: 1432-0878
    Keywords: Monoclonal antibodies ; Spermatozoa ; Surface antigens ; Reproductive organs ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Eleven monoclonal antibodies that recognize membrane determinants on spermatozoa of the carp Cyprinus carpio L. have been produced. Indirect immunofluorescence revealed that these determinants are uniformly distributed on the surface of head and midpiece. Most of them are also present on the outer membrane of precursor sperm cells. Although none of the monoclonal antibodies reacted with carp somatic tissue, five monoclonal antibodies were positive for surface membrane determinants of oogonia and early prophase oocytes in carp ovary. Preliminary analysis of the testis and ovary of three other species of fish showed that some carp determinants are shared with germ cells from Barbus conchonius, Clarias lazera, or Salmo gairdneri.
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    URL: http://dx.doi.org/10.1007/BF00216518
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    Purification and immunohistology of a glycoprotein secreted from the rabbit uterus before implantation (1984)
    Springer
    Cell & tissue research 237 (1984), S. 155-160 
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    ISSN: 1432-0878
    Keywords: Uterine epithelium ; Uterine proteins ; β-Glycoprotein ; Immunohistochemistry ; Rabbit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Two antigens of the β-glycoprotein fraction from rabbit uterine secretion of the seventh day post coitum were purified firstly by gel filtration on Sephadex G 150, then either by ion exchange chromatography on DEAE Sephacel or chromatofocusing on PBE 94. By the use of a specific antiserum, raised in female sheep, two antigens with α 2- and β 2-mobility in agar gel electrophoresis could be demonstrated. Immunohistochemical staining of the uterine epithelium at the seventh and eighth day post coitum showed the antigens to be localized in a ciliated cell type of conspicuous shape, which is supposed to be the site of synthesis. Stain accumulated mainly in the apical part of the cell, but there were also small deposits around the nucleus.
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    The bovine tubouterine junction: general innervation pattern and distribution of adrenergic, cholinergic, and peptidergic nerve fibers (1993)
    Springer
    Cell & tissue research 274 (1993), S. 493-501 
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    ISSN: 1432-0878
    Keywords: Tubouterine junction ; Innervation ; Immunohistochemistry ; Acetylcholinesterase ; Bovine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The innervation of the bovine tubouterine junction was studied in sexually mature heifers using antisera against various neuronal markers and a modified acetylcholinesterase method. The vast majority of the nerve fibres in the bovine tubouterine junction belongs to the sympathetic nervous system; peptidergic and cholinergic fibers are restricted to characteristic locations. The endosalpinx in the adovarian portion of the terminal tubal segment is poorly innervated. The mucosa of the aduterine portion and of the tubouterine transitinal region proper receives a strikingly dense innervation, which is observed mainly in combination with a strong vascularisation of specialised mucosal structures. In the endometrium, perivascular nerves accompany the ascending spiral arteries but sporadic contacts between nerve fibres and uterine glands are also observed. From the muscular coat the inner longitudinal layer of the terminal tubal segment is more richly supplied by nerve fibres than the intermediate circular and outer longitudinal layers of the tubouterine junction. No changes in the innervation pattern were seen during the different stages of the sexual cycle.
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    Histamine immunoreactivity in the central nervous system of the spider Cupiennius salei (1993)
    Springer
    Cell & tissue research 273 (1993), S. 533-545 
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    ISSN: 1432-0878
    Keywords: Immunohistochemistry ; Neurotransmitters ; Neuromodulators ; Histamine ; Visual system ; Nervous system, central ; Cupiennius salei (Arachnida)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In this study, immunohistochemistry on Vibracut sections is used to demonstrate anti-histamine immunoreactivity in the brain of the spider, Cupiennius salei (Keys.) (Ctenidae). We describe a system of histamine-immunoreactive neurons within the central nervous system that consists of six omnisegmental neurons. These histamine-immunoreactive neurons form two subgroups: a dorsal system with two cells per hemisphere and a ventral system with only one cell per hemisphere. The cells have extended arborizations in the motor and sensory areas of all neuromeres in the suboesophageal ganglionic mass. We have also found histamine immunoreactivity in the photoreceptors of C. salei and suggest that histamine is a neurotransmitter of photoreceptors in all arthropods, since it is also known to occur in the photoreceptors of the other main arthropod taxa (Merostomata, Crustacea, and Insecta).
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    Immunohistochemical localization of a gap junction protein (connexin43) in the muscularis externa of murine, canine, and human intestine (1993)
    Springer
    Cell & tissue research 274 (1993), S. 249-256 
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    ISSN: 1432-0878
    Keywords: Connexin43 ; Gap junction ; Muscularis externa ; Intestine ; Coronary artery ; Immunohistochemistry ; Mouse ; Dog ; Man ; Pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Electron-microscopic studies have revealed a heterogeneous distribution of gap junctions in the muscularis externa of mammalian intestines. This heterogeneity is observed at four different levels: among species; between small and large intestines; between longitudinal and circular muscle layers; and between subdivisions of the circular muscle layer. We correlated results obtained with two immunomethods, using an antibody to the known gap-junctional protein (connexin43) with ultrastructural findings, and further evaluated the respective sensitivity of these two approaches. For comparative reasons we also included the vascular smooth muscle of coronary arteries into our study. Two versions of the immunotechnique (peroxidase-antiperoxidase and fluorescence methods) were applied to frozen sections of murine, canine, and human small and large intestines, as well as to pig coronary artery. In the small intestine of all three species a very strong reactivity marked the outer main division of the circular muscle layer, while the longitudinal muscle layer as well as the inner thin division of the circular muscle layer were negative. In murine and human colon both muscle layers were negative, while in canine colon the border layer between the circular muscle and the submucosa reacted strongly, and scattered activity was found in the portion of the circular muscle layer (one tenth of its thickness) closest to the submucosa. The remainder of the circular muscle layer and the entire longitudinal muscle layer were negative in the canine colon. In the coronary artery we could not confirm the positive, specific labeling reported by other investigators (l.c.). In conclusion, we found close correlations at all four above-mentioned levels in the distribution of gap junctions in the gut musculature, as determined by binding of anticonnexin43 in comparison to conventional ultrastructural studies. Since no significant immunostaining was found in (i) the outer border of the circular muscle layer of the canine colon and (ii) the border layer between the submucosa and the circular muscle layer of human colon, where rare gap junctions have been identified at the ultrastructural level, we conclude that the electron-microscopic analysis is the more sensitive of the two methods.
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    The auricular myocardiocytes of the heart constitute an endocrine organ characterization of a porcine cardiac peptide hormone, cardiodilatin-126 (1984)
    Springer
    Cell & tissue research 238 (1984), S. 425-430 
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    ISSN: 1432-0878
    Keywords: Heart, atrium ; Myoendocrine cells ; Cardiodilatin ; Peptide hormone ; Immunohistochemistry ; Pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A peptide hormone was extracted from the porcine right atrium following a bioassay for differential vaso-relaxant effects on smooth muscle strips from aorta and renal and inferior mesenteric arteries. The isolation procedure included several steps of gel-permeation and ion-exchange chromatography, and high performance liquid chromatography. During the isolation procedure, other peptides of smaller molecular weight were also found, which, in relation to cardiodilatin-126 (CDD-126), are shorter at their N-terminal. Among these, CDD-88 has also been isolated and characterizied, and has been established as a prominent member of the cardiac hormone family. The N-terminal and C-terminal segments of the 126 amino acid-containing molecule were synthesized and used to raise region-specific antibodies. The natural peptide was then localized within myoendocrine cells of the right atrium where specific atrial granules are located. Renal effects of cardiodilation were studied in conscious dogs and showed strong diuretic and natriuretic activities. According to our functional studies, cardiodilatin-126 and cardiodilatin-88 possess qualities of a significant hormone family regarding the regulation of extracellular fluid volume and blood pressure.
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    Irregular distribution of mammary-derived growth inhibitor in the bovine mammary epithelium (1993)
    Springer
    Cell & tissue research 272 (1993), S. 383-389 
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    ISSN: 1432-0878
    Keywords: Mammary gland ; Growth inhibitor ; Epithelium ; Cell types ; Differentiation ; Immunocytochemistry ; Immunohistochemistry ; Cow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Localization of a mammary-derived growth inhibitor (MDGI) in the bovine mammary gland was verified by light-and electron-microscopic methods. Expression of MDGI, which is known to inhibit the growth of mammary epithelial cell lines in vitro, was found to be highest in the late pregnant and in the lactating state. A combination of immunohistochemical and immunocytochemical methods with semi- and ultrathin resin sections revealed marked variations in MDGI staining. High MDGI levels were predominantly detectable in epithelial cells with large milk fat droplets. Distinct cell types that were almost free of label could be identified among bovine mammary epithelial cells that always exhibited high MDGI levels. Similar results were obtained when using a serum-free organ culture system in which MDGI was hormonally induced in cell types of comparable differentiation state. The specific occurrence of the growth inhibitor in developing alveoli and certain cell types points to the association between MDGI expression and functional differentiation in the normal mammary gland.
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    Basic fibroblast growth factor-like immunoreactivity in the rat trigeminal sensory system and peri-oral skin with vibrissae (1993)
    Springer
    Cell & tissue research 272 (1993), S. 417-427 
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    ISSN: 1432-0878
    Keywords: Basic fibroblast growth factor ; Trigeminal ganglion ; Immunohistochemistry ; Electron microscopy ; In situ hybridization histochemistry ; Vibrissae ; Hair ; Rat (Wistar)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We have characterized an antiserum against basic fibroblast growth factor (bFGF) by immunoblot, investigated the location of bFGF-like immunoreactivity (bFGF-IR) in the trigeminal sensory system and perioral skin endowed with vibrissae, and demonstrated the site of bFGF mRNA expression in the vibrissae by in situ hybridization histochemistry. Light-microscopic immunohistochemistry has demonstrated that bFGF-IR is present not only in trigeminal ganglion neurons and their central and peripheral processes, but also in cells of the matrix, external root sheath and papillae of vibrissae and the stratum basale of the stratified squamous epithelium of the skin. Electron microscopy has revealed intense bFGF-IR mainly in cytoplasmic regions, other than the lumen of rough endoplasmic reticulum and the Golgi apparatus, in trigeminal ganglion neurons, in fibroblast-like cells in the papillae, and in capsules of vibrissae. In contrast, actively proliferating and/or differentiating cells in the matrix of vibrissae have intensely stained euchromatin and weakly labeled cytoplasm that, unlike that of the aforementioned cells, contain immunoreaction products in discrete spots less than 100 nm in diameter, implying the generation of different molecular forms of bFGF in cells of the matrix and papillae. Moreover, the accumulation of bFGF in the euchromatin appears to take place in cells at non-mitotic stages (possibly interphases), characterized by a conspicuous nucleolus and well-developed nuclear envelope. A digoxigenin-labeled cRNA probe for the demonstration of bFGF mRNA gives conspicuous hybridization signals mainly in the matrix of vibrissae. These findings suggest that bFGF is involved in the growth and differentiation of matrix cells during certain periods of the cell cycle and that it acts as a non-mitogenic mediator in the adult trigeminal sensory system.
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    URL: http://dx.doi.org/10.1007/BF00318548
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    Immunohistochemical localization of chromogranin A and B in endocrine cells of the alimentary tract of the adult lizard Podarcis sicula (1993)
    Springer
    Cell & tissue research 273 (1993), S. 335-344 
    Details
    ISSN: 1432-0878
    Keywords: Chromogranins ; Serotonin ; Histamine ; Regulatory peptides ; Gut ; Monoclonal antibodies ; Immunohistochemistry ; Podarcis sicula (Lacertilia)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The distribution, argyrophilia, and the possible amine/peptide co-localizations in endocrine cells immunoreactive (IR) to antisera against chromogranin A (CgA) and chromogranin B (CgB) in the alimentary tract of the lizard Podarcis sicula have been investigated using novel monoclonal antibodies. Many CgA-IR and CgB-IR cells were found in the tract, except in the distal small intestine. Almost all chromogranin-IR cells (Cgs-IR) were also argyrophilic with parallel intensity. Some CgA-IR and CgB-IR cells did not display co-localized amines or peptides. CgA or CgB or both were found co-localized, with some local differences, in almost all serotonin-IR, histamine-IR, substance P-IR and gastric peptide tyrosine tyrosine (PYY)-IR cells. Moreover, both Cgs were co-localized only in some somatostatin-IR cells, whereas neurotensin-IR, gastrin/cholecystokinin-IR, pancreatic polypeptide-IR and intestinal PYY-IR cells did not show any co-localization with Cgs. The presence of Cgs in the endocrine cells was heterogeneous with regard to the complex interrelationship with their amine/peptide content. Consequently, Cgs cannot be considered as universal “markers” of all endocrine cell types.
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    Serotoninergic innervation of the alimentary canal of the Colorado potato beetle, Leptinotarsa decemlineata: structural and functional aspects (1993)
    Springer
    Cell & tissue research 273 (1993), S. 475-485 
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    ISSN: 1432-0878
    Keywords: Serotonin ; Alimentary canal, insect ; Stomatogastric neryous system ; Immunohistochemistry ; Bioassay ; Electron microscopy ; Leptinotarsa decemlineata (Insecta)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Immunohistochemical studies showed that the alimentary canal of Leptinotarsa decemlineata receives serotoninergic innervation from different neurons in the central and stomatogastric nervous system. The foregut is innervated by the frontal ganglion. Four of the 6–8 large neurons present in this ganglion have axons which run to the musculature of the oesophagus, crop, sphincter, and frontal area of the midgut. They are accompanied by axons from neurons in the suboesophageal ganglion, and by axons from as yet unidentified non-immunoreactive neurons in thebrain and/or the ventral nerve cord. The posterior part of the midgut is essentially devoid of serotoninergic innervation. The hindgut is innervated by two large neurons in the caudal tip of the last abdominal ganglion. The axons always run to the circular and longitudinal muscles of the crop, the circular muscles of the sphincter, and the longitudinal muscles of the hindgut. Immunohistochemical electron microscopy suggests that exocytosis of the immuno-labelled vesicles may occur at some distance from the muscle fibres, implying a neurohormonal release of this neurochemical. A bioassay used to demonstrate the type of effect of serotonin on isolated hindguts in vitro, indicated a clear inhibitory effect on spontaneous contractions at concentrations of 10-8–10-5 M. This effect was dose-dependent. Axons found in association with the cryptonephridial system on the hindgut might be involved in the control of diuresis although we have not tested this possibility experimentally.
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    An immunohistochemical study of the innervation of the large intestine of the toad (Bufo marinus) (1993)
    Springer
    Cell & tissue research 274 (1993), S. 115-125 
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    ISSN: 1432-0878
    Keywords: Autonomic innervation ; Immunohistochemistry ; Intestine, large ; Myenteric plexus ; Neurons ; Neuropeptide colocalization ; Bufo marinus (Anura)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The distribution of intrinsic enteric neurons and extrinsic autonomic and sensory neurons in the large intestine of the toad, Bufo marinus, was examined using immunohistochemistry and glyoxylic acid-induced fluoresecence. Three populations of extrinsic nerves were found: unipolar neurons with morphology and location typical of parasympathetic postganglionic neurons containing immunoreactivity to galanin, somatostatin and 5-hydroxytryptamine were present in longitudinally running nerve trunks in the posterior large intestine and projected to the muscle layers and myenteric plexus throughout the large intestine. Sympathetic adrenergic fibres supplied a dense innervation to the circular muscle layer, myenteric plexus and blood vessels. Axons containing colocalized calcitonin gene-related peptide immunoractivity and substance P immunoreactivity distributed to all layers of the large intestine and are thought to be axons of primary afferent neurons. Five populations of enteric neurons were found. These contained immunoreactivity to vasoactive intestinal peptide, which distributed to all layers of the large intestine; galanin/vasoactive intestinal peptide, which projected to the submucosa and mucosa; calcitonin gene-related peptide/vasoactive intestinal peptide, which supplied the circular muscle, submucosa and mucosa; galanin, which projected to the submucosa and mucosa; and enkephalin, which supplied the circular muscle layer.
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    Diffuse serotoninergic neurohemal systems associated with cerebral and suboesophageal nerves in the head of the Colorado potato beetle Leptinotarsa decemlineata (1993)
    Springer
    Cell & tissue research 273 (1993), S. 327-333 
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    ISSN: 1432-0878
    Keywords: Serotonin (5-HT) ; Neurohemal systems ; Immunohistochemistry ; Electron microscopy ; Targeted release ; Leptinotarsa decemlineata (Insecta)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We analyzed the anatomy of two diffuse neurohemal systems for serotonin in the head of the Colorado potato beetle Leptinotarsa decemlineata by means of immunohistochemistry. One system is formed by axons from two bilateral pairs of neurons in the frontal margin of the suboesophageal ganglion that enter the ipsilateral mandibular nerve, emerge from this nerve at some distance from the suboesophageal ganglion, and cover all branches of the mandibular nerve with a dense plexus of immunoreactive axon swellings. The other system is formed by axons from two large neurons in the frontal ganglion that enter the ipsilateral frontal connectives, emerge from these connectives, and form a network of axon swellings on the labroforntal, pharyngeal, and antennal nerves and on the surface of the frontal ganglion. Immunohistochemical electron microscopy demonstrated that the axon swellings are located outside the neural sheaths of the nerves and hence in close contact with the hemolymph. We therefore suggest that these plexuses represent extensive neurohemal systems for serotonin. Most immunoreactive terminals are in direct contact with the hemolymph, and other terminals are closely associated with the muscles of the mandibles, labrum, and anterior pharynx, as well as with the salivary glands, indicating that these organs are under serotoninergic control.
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    Towards disciplinary disintegration in biology (1993)
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    Biology and philosophy 8 (1993), S. 259-275 
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    ISSN: 1572-8404
    Keywords: Animal orientation ; coherence ; conceptual analysis ; descriptive philosophy ; fitness ; generality ; integration of disciplines ; kinesis ; normative philosophy ; pseudo-integration ; stress ; taxis ; unity of science
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Philosophy
    Notes: Abstract Interdisciplinary integration has fundamental limitations. This is not sufficiently realized in science and in philosophy. Concerning scientific theories there are many examples of pseudo-integration which should be unmasked by elementary philosophical analysis. For example, allegedly over-arching theories of stress which are meant to unite biology and psychology, upon analysis, turn out to represent terminological rather than substantive unity. They should be replaced by more specific, local theories. Theories of animal orientation, likewise, have been formulated in unduly general terms. A natural history approach is more suitable for the study of animal orientation. The tendency to formulate overgeneral theories is also present in evolutionary biology. Philosophy of biology can only deal with these matters if it takes a normative turn. Undue emphasis on interdisciplinary integration is a modern variant of the old unity of science ideal. The replacement of the ideal by a better one is an important challenge for the philosophy of science.
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    Antistress effect of prolactin (1984)
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    Bulletin of experimental biology and medicine 97 (1984), S. 35-38 
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    ISSN: 1573-8221
    Keywords: hormones ; prolactin ; stress ; adaptation ; heart
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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    URL: http://dx.doi.org/10.1007/BF00830237
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    Effect of external and internal factors on dependence of the action of psychostimulants on learning ability (1984)
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    Bulletin of experimental biology and medicine 97 (1984), S. 62-64 
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    ISSN: 1573-8221
    Keywords: psychostimulants ; stress ; emotional reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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    Stress-protective properties of lithium nicotinate, a new nicotinic acid derivative (1984)
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    Bulletin of experimental biology and medicine 97 (1984), S. 293-296 
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    ISSN: 1573-8221
    Keywords: stress ; working capacity ; cardiovascular system ; lithium nicotinate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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    Endocrine and metabolic mechanisms of the pathological syndrome induced by homologous glial tissue antigens in monkeys (1984)
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    Bulletin of experimental biology and medicine 98 (1984), S. 1638-1641 
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    ISSN: 1573-8221
    Keywords: glial antigens ; hormones ; proteins ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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    Neurochemical analysis of the mechanism of action of serotoninergic drugs on avoidance behavior in a situation of acute stress (1984)
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    Bulletin of experimental biology and medicine 97 (1984), S. 429-432 
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    ISSN: 1573-8221
    Keywords: serotonin and its receptors ; stress ; behavior
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    Activation of rat brain Na,K-ATPase by stress (1984)
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    Bulletin of experimental biology and medicine 97 (1984), S. 590-592 
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    ISSN: 1573-8221
    Keywords: stress ; sex ; brain Na,K-ATPase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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    Relations between natural killer cytotoxicity and interferon systems in immobilization stress (1984)
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    Bulletin of experimental biology and medicine 98 (1984), S. 1556-1558 
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    ISSN: 1573-8221
    Keywords: stress ; normal killer cells ; interferons and their inducers
    Source: Springer Online Journal Archives 1860-2000
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    Stress-induced inhibition of mouse leukemia immunocytotherapy and its possible abolition (1984)
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    Bulletin of experimental biology and medicine 98 (1984), S. 1676-1678 
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    ISSN: 1573-8221
    Keywords: stress ; immunocytotherapy of leukemia
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    Age differences in poststress repair of myocardial DNA (1984)
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    Bulletin of experimental biology and medicine 98 (1984), S. 1618-1620 
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    ISSN: 1573-8221
    Keywords: stress ; age ; myocardium ; DNA injury and repair
    Source: Springer Online Journal Archives 1860-2000
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    Divergent responses to long-term stressors in rat lines selected for different functional states of the nervous system (1993)
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    Behavior genetics 23 (1993), S. 499-503 
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    ISSN: 1573-3297
    Keywords: Selection ; stress ; neural function ; behavior ; rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract The conditioned and reflex parameters in rat lines selected for the threshold of excitability (a fundamental characteristics of the functional state of the nervous system) were estimated. This measure is based on the response of the tibial nerve to electrical stimulation, which gives a general indication of the level of excitability of other parts of the nervous system. Testing was made 1–3 days after 15 days of daily stress caused by randomly presented pairing of light and unavoidable electric shock. Expression of the sensitivity to the electric current, and the reflex components of the behavior, depends on the genetically determined level of the functional state of the nervous system
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    Non-structural carbohydrate: Analysis by near infrared reflectance spectroscopy and its importance as an indicator of plant growth (1993)
    Springer
    Plant and soil 155-156 (1993), S. 243-246 
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    ISSN: 1573-5036
    Keywords: fructans ; NIR ; nitrogen ; non-structural carbohydrates ; rice ; starch ; stress ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Plant shoot samples are frequently analysed to assess if crops require additional nitrogen or mineral elements to maintain satisfactory growth. If plant growth is limited by temperature, water stress, disease, lodging or a mineral deficiency, non-structural carbohydrates (NSC) may be accumulated in, or depleted from, tissues especially those in the lower stems. Plant testing laboratories do not routinely analyse NSC to assist in the identification of plant stress probably because skilled technicians and time are required for the wet chemical determination. In this paper we report that routine determination of NSC is possible using near-infrared reflectance spectroscopy; the errors of determination are comparable with traditional chemical methods. The concentration of NSC in the shoots of rice grown in south eastern Australia ranges from 1.6 to 22.8%, as starch. In the shoots of wheat grown in eastern Australia the range is from 2.4 to 35.2%, as fructans. In both crops the NSC content is highly inversely correlated with the shoot nitrogen content. Based on data from commercial wheat and rice crops we suggest that the ratio between nitrogen and NSC can be used to identify crops in which growth has been limited by a stress other than nitrogen and so are unlikely to show the predicted response to an application of nitrogen fertilizer.
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    Stress and disturbance in the phytoplankton community of a shallow, hypertrophic lake (1993)
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    Hydrobiologia 249 (1993), S. 15-24 
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    ISSN: 1573-5117
    Keywords: phytoplankton collapse ; species diversity ; mixotrophy ; CO2−depletion ; pH ; stress ; disturbance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The validity of Connell's ‘intermediate disturbance hypothesis’ in phytoplankton communities was tested on data from a hypertrophic, shallow lake, Hjarbæk Fjord, Denmark. The present data from Hjarbæk Fjord demonstrate the difficulties in distinguishing stress from disturbance in a phytoplankton community, and show that great changes in the phytoplankton community can take place within few days. A collapse of blue-green algae in late June 1986 caused remineralization of nutrients and resulted in a rapid increase of fast-growing small chlorococcal green algae and phytoplankton species diversity, without any external disturbances acting on the lake. External disturbances in the form of wind action and brackish water intrusion occurred several days after the onset of these events. Carbon depletion and pH 11.0 were severe stress factors on the phytoplankton community. They were induced by calm, warm weather, but eventually acted as a kind of disturbance to the normally well circulated lake.
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    The influence of different disturbance frequencies on the species richness, diversity and equitability of phytoplankton in shallow lakes (1993)
    Springer
    Hydrobiologia 249 (1993), S. 135-156 
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    ISSN: 1573-5117
    Keywords: Intermediate Disturbance Hypothesis ; community composition ; seasonality ; complexity ; stress ; characteristic disturbance pattern
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The relationships between the species richness, diversity and equitability of phytoplankton is discussed in the context of Connell's (1978, Science 199: 1304–1310) Intermediate Disturbance Hypothesis (IDH). The records of 759 vertical phytoplankton samples, which were obtained from four shallow central European lakes (Balaton, Neusiedlersee, and two small artificial ponds) at daily to weekly intervals were analysed. 1) The Shannon-Weaver function was used to measure diversity of the recorded species compositionof the phytoplankton. It is shown on fictitious data that compositional diversity is sensitive to the numberof coequilibrating species provided that the suspected interrelationship between diversity and ‘complexity’is amenable to the application of this method. 2) The disturbance scale that was developed on the basis of the field records fits well to Reynolds'(1988, Verh. int. Ver. Limnol. 23: 683–691) derivation: 〈 3 days qualifies as high frequency, approximatel3–8 days as intermediate frequency and 〉 8–9 days as low frequency of disturbance for phytoplankton. 3) Arithmetical means of the compositional diversity of phytoplankton under different frequencies ofdisturbance support the hypothesis that maximal diversity appears at intermediate frequencies. 4) There are different reasons for decrease in diversity at higher and lower frequencies. Inequitabilitydiminishes diversity at low disturbance; while species number decreases at high frequencies. 5) The case of Neusiedlersee calls attention to the fact that it is difficult, if at all possible, to differentiatebetween the indices under continuous stress and high frequency of disturbance in lakes in temperateregions. Similar species number-equitability pattern are induced by both and it is also presumablethat high frequency disturbance can itself effect a serious stress. 6) The striking effects that regular major periodic events (e.g. significant changes in the grazing pressureat the onset of the clear-water phase, autumnal cooling) in the plankton have on its species diversity areevident. Thus, the relative importance of intermediate frequency disturbances has its own seasonality:it is increasingly important in periods (partly in the spring, but mostly in the summer-autumn equilibriumphases), in which competition among phytoplankton species is increasing. This observation suggestsa way by which the stochasticity-based IDH can be incorporated into rather more deterministicexplanations (e.g. PEG-model; Sommer et al., 1986. Archiv für Hydrobiologie 106: 433–471) of planktonsuccession. 7) The most controversial issue and, therefore, the main difficulty, with IDH is that it not onlymaintains species richness in an ecosystem but it also supposes its presence. The lack of either earlyor late successional species in a given community can inactivate the mechanism. From the point of viewof the diversity-species richness relationship, the persistence of disturbance at given frequencies is ofgreater importance than the temporal alterations themselves in the evolutionary ecology of the phytoplankton. 8) For characteristically unperturbed phytoplankton communities (no case was studied here), equilibriumconcepts (niche diversification, etc.) should be more strongly applicable to their diversity andspecies richness.
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    Gonadotropin-releasing hormone in cartilaginous fishes: structure, location, and transport (1993)
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    Environmental biology of fishes 38 (1993), S. 197-208 
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    ISSN: 1573-5133
    Keywords: Elasmobranchs ; Holocephalans ; Neuropeptides ; Brain ; Immunohistochemistry ; Reproduction ; Vertebrates ; Evolution ; Chondrichthyes ; Sharks ; Skates ; Ratfish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Gonadotropin-releasing hormone (GnRH) is thought to play a fundamental role in the reproduction of cartilaginous fishes. The primary structures of the only form of GnRH in ratfish,Hydrolagus colliei, and one of four forms of GnRH in dogfish,Squalus acanthias, have recently been shown to be identical to a form originally isolated from birds (chicken GnRH-II). Phylogenetic studies indicate that this chicken GnRH-II molecule is the most highly conserved GnRH family member in vertebrates; it is present in animals from cartilaginous fishes to marsupials. However, the presence of four immunoreactive forms of GnRH inS. acanthias, but only one form inH. colliei suggests that the two subclasses of these species diverged a long time ago. Immunocytochemical localization of GnRH shows that it is found in the brains of all chondrichthyans examined to date. GnRH cell bodies and fibers were found in specific patterns throughout the brain in our studies of dogfish shark and black skate,Bathyraja kincaidii. The lack of immunoreactive GnRH fibers in the median eminence and the unique arrangement of the pituitary in Chondrichthyes suggest that transport of GnRH from the brain to the pituitary gonadotropes occurs in the systemic circulation. The use of this unconventional route is further supported by markedly higher levels of serum GnRH in ratfish compared with other vertebrates.
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    β-adrenergic signal transduction in fish: interactive effects of catecholamines and cortisol (1993)
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    Fish physiology and biochemistry 11 (1993), S. 195-203 
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    ISSN: 1573-5168
    Keywords: catecholamines ; cortisol ; cyclic AMP ; fish ; red blood cell ; hepatocyte ; hypoxia ; stress ; oxygen ; adrenoreceptors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'élévation des niveaux de cathécolamines plasmatiques pendant un stress aigu déclenche une série de mécanismes physiologiques et biochimiques de compensation destinés à suprimer les effets destructeurs du stress sur les transport d'oxygène par le sang. L'activation β-adrénergique de l'antipore Na+/H+ associé à la membrane des globules rouges du sang (rbc) est particulièrement importante. Après activation, l'antipore Na+/H+ excrète du globule rouge H+ et l'alcalinisation du milieu intérieur du globule qui en résulte sert à stimuler l'affinité et la capacité de liaison hémoglobine-O2. L'activation de l'échangeur Na+/H+ est dépendante de l'accumulation intracellulaire d'AMP cyclique. La quantité d'AMP cyclique accumulée est déterminée en partie par le nombre et/ou l'affinité des β-adrénorécepteurs situés à la surface des cellules. Des études récentes montrent que le nombre de β-adrénorécepteurs de surface augmente rapidement pendant une hypoxie aigue et que ce phénomène pourrait expliquer la stimulation de la réponse des globules rouges hypoxiques à des cathécolamines exogènes. Dans certains cas, les niveaux plasmatiques de cortisol et de cathécolamine augmentent simultanément. Nous avons récemment montré qu'une augmentation chronique (10 jours) des niveaux de cortisol in vivo ou une élévation de courte durée (24h) in vitro conduisent à une augmentation des β-adrénorécepteurs internalisés. Suite à l'exposition de globules rouges à une hypoxie, ces nouveaux récepteurs sont rapidement recrutés à la surface de la cellule où ils deviennent fonctionnellement couplés à l'adénylate cyclase. En dernier lieu donc, une élévation chronique des niveaux de cortisol augmente la réponse des globules rouges aux cathécolamines circulants. Nous avons récemment identifié une augmentation similaire des β-adrénorécepteurs de surface cellulaire par le cortisol et une réponse physiologique (glycogénolyse) stimulée par les cathécolamines dans les hépatocytes de truite. Ainsi, une élévation chronique des niveaux de cortisol semble être en général adaptative et augmentant la sensibilité du système de transduction du signal β-adrénergique dans au moins 2 types de cellules (les globules rouges et les hépatocytes) impliquées dans l'amélioration du stress aigu quand les niveaux de cathécolamine plasmatique augmentent.
    Notes: Abstract The elevation of plasma catecholamine levels during acute stress initiates a series of compensatory physiological and biochemical mechanisms to alleviate the disruptive effects of stress on blood oxygen transport. Of particular importance is the β-adrenergic activation of a Na+/H+ antiporter associated with the red blood cell (rbc) membrane. Upon activation, the Na+/H+ antiporter extrudes H+ from the rbc and the resultant alkalinization of the rbc interior serves to enhance both the affinity and the capacity of haemoglobin O2 binding. The activation of the Na+/H+ exchanger is dependent upon the intracellular accumulation of cyclic AMP. The extent of cyclic AMP accumulation is determined, in part, by the number and/or affinities of cell surface β-adrenoreceptors. Recent studies have shown that the number of cell surface β-adrenoreceptors are rapidly increased during acute hypoxia and that this phenomenon may explain the enhanced responsiveness of hypoxic rbc's to exogenous catecholamines. In certain instances, plasma catecholamine and cortisol levels rise concurrently. We recently have shown that chronic (10 day) elevation of cortisol levels, in vivo, or short-term (24h) elevation, in vitro, caused significant elevation of internalized β-adrenoreceptors. Upon exposure of the rbc's to hypoxia, these additional receptors are rapidly recruited to the cell surface where they become functionally coupled to adenylate cyclase. Ultimately, therefore, chronic elevation of plasma cortisol levels increases the responsiveness of the rbc to circulating catecholamines. We recently have identified similar enhancement of cell surface β-adrenoreceptors by cortisol and increased physiological responsiveness (glycogenolysis) to catecholamines in trout hepatocytes. Thus, chronic elevation of cortisol levels appears to be generally adaptive for increasing the sensitivity of the β-adrenergic signal transduction system of at least two cell types (rbc's, hepatocytes) involved in the amelioration of acute stress when plasma catecholamine levels rise.
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    Fluctuating asymmetry and sexual selection (1993)
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    Genetica 89 (1993), S. 267-279 
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    ISSN: 1573-6857
    Keywords: fluctuating asymmetry ; heterozygosity ; reliable signalling ; sexual selection ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fluctuating asymmetry occurs when an individual is unable to undergo identical development on both sides of a bilaterally symmetrical trait. Fluctuating asymmetry measures the sensitivity of development to a wide array of genetic and environmental stresses. We propose that fluctuating asymmetry is used in many signalling contexts for assessment of an individual's ability to cope with its environment. We hypothesize that fluctuating asymmetry is used in sexual selection, both in fighting and mate choice, and in competition for access to resources. Evidence is reviewed showing that the patterns of fluctuating asymmetry in secondary sexual characters differ from those seen in other morphological traits. Secondary sexual characters show much higher levels of fluctuating asymmetry. Also, there is often a negative relationship between fluctuating asymmetry and the absolute size of ornaments, whereas the relationship is typically U-shaped in other morphological traits. The common negative relationship between fluctuating asymmetry and ornament size suggests that many ornaments reliably reflect individual quality.
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    Inhibition of anti-CD3 monoclonal antibody-induced T-cell proliferation and interleukin-2 secretion by physiologic combinations of dexamethasone and prostaglandin E2 (1993)
    Springer
    Cellular and molecular neurobiology 13 (1993), S. 579-592 
    Details
    ISSN: 1573-6830
    Keywords: T-cell proliferation ; glucocorticoids ; prostaglandin ; interleukin-2 ; interleukin-2 receptor ; stress ; inflammatory response
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The purpose of these studies was to characterize further previous observations from our laboratory indicating that physiologic concentrations of dexamethasone (DEX) and prostaglandin E2 (PGE2) added together result in synergistic inhibition of the proliferative response of T cells stimulated via the T-cell receptor CD3 signaling complex (TCR/CD3). 2. Various physiologic concentrations of DEX and PGE2 were added to T cells stimulated with immobilized anti-CD3 monoclonal antibody (mAb) and cultured at optimal and suboptimal cell densities. The results demonstrate that the proliferative response of anti-CD3 mAb-stimulated T cells cultured at a suboptimal cell density is more suppressed than that of T cells cultured at optimal concentrations. 3. The proliferative response of CD4+ T cells to immobilized anti-CD3 mAb was also determined in the presence of PGE2 and DEX. The data indicate that the CD4+ subset of T cells is more sensitive to the synergistic antiproliferative effects of DEX and PGE2 compared to whole T-cell populations. 4. Various concentrations of DEX and/or PGE2 were added to T cells stimulated with anti-CD3 mAb and the secretion of interleukin-2 (IL-2) was determined. The results demonstrate that concentrations of DEX and PGE2 which individually do not significantly suppress IL-2 synthesis act together to inhibit the synthesis of IL-2 synergistically. 5. The addition of an exogenous source of recombinant IL-2 (rIL-2) to T cells stimulated in the presence of DEX and PGE2 completely reversed the synergistic antiproliferative effect of these two compounds. This reversal was even more pronounced with T cells cultured at a suboptimal cell density. Additionally, PGE2 and DEX did not affect expression of the IL-2 receptor (IL-2R), as measured by upregulation of the alpha chain, on anti-CD3 mAb stimulated T cells. 6. Collectively these data indicate that physiologic concentrations of PGE2 and DEX, which alone have no effect on anti-CD3 mAb-induced T-cell proliferation, act synergistically to inhibit T-cell proliferation as well as IL-2 synthesis.
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    Structure-activity relationship of stress-inducing odorants in the rat (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 1007-1018 
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    ISSN: 1573-1561
    Keywords: Rat ; Rattus norvegicus sp. ; odorants ; stress ; behavior ; open field ; corticosterone ; fox dropping ; ketone ; sulfur ; compounds ; tans ; mercaptoketones ; repellent ; structure-activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The stress for 12 sulfur-containing synthetized volatiles was evaluated in male Wistar rats and compared to that for fox-dropping extract concentrate. Stress behavior was analyzed by quantifying various stress responses in a standard open field and measuring the increase in plasma corticosterone concentration. Nine compounds induced stress—a dihydrothiazole, two cyclic polysulfides, five mercaptoketones, and a mercaptan. For the mercaptoketones, the following structure-activity relationships were observed. Size can vary considerably; the mercapto group can be either alpha or beta and either secondary or tertiary. The keto group is not essential, since a structurally related mercaptan remains active. The mercapto group is essential for activity in mercaptoketones, since conversion to a methyl sulfide resulted in a neutral response. This type of odorant could function as an allomone and may have potential in rat control as an area repellent.
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    Anaesthesia monitoring: the human factors component of technology transfer (1993)
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    Journal of clinical monitoring and computing 10 (1993), S. 23-29 
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    ISSN: 1573-2614
    Keywords: anaesthesia ; monitoring ; technology transfer ; human factors ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract Resistance to change in monitoring practices from within the anaesthesiology community is a formidable obstacle, and coercive and exhortatory solutions are likely to be unsuccessful in some situations. An analysis of publications about technology transfer and professional obsolescence, and application of this data to the practice of anaesthesia, reveals various stresses that technology transfer from research areas to the workplace may induce in vulnerable anaesthesiologists and account for their attitudes. It is suggested that the invaluable pronouncements of high profile anaesthesiologist groups must be supplemented by supportive behaviour by physicians and administrators at an institutional level. The human factors issues to be addressed include: (i) Monitored data acquisition skills. (ii) Possibility of acting on monitored data. (iii) Assistance for personal insight into attitudinal difficulties that may be encountered. (iv) Data supporting the value of the device. (v) Ergonomically effective integration of the monitor into the work station. Alternatively the perceptions of potential users may accurately reflect changes in their status in the new work situation created by monitors, and decision making aids that may or may not be derived from them. Thus, plans to present job satisfaction in related clinical areas or to associate the proposed new system with evaluation of its effect on patient outcome will be necessary. In this way the clinician becomes involved in clinical research, a quality of personal and quality care development.
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    Diffusion of moisture in deformable porous media. Anisotropic fibrous materials (1993)
    Springer
    Transport in porous media 11 (1993), S. 117-138 
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    ISSN: 1573-1634
    Keywords: Fibrous media ; glass wool ; moisture transfer ; deformation ; coefficient of diffusion ; hydraulic conductivity ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract This paper presents a study on the deformation of anisotropic fibrous porous media subjected to moistening by water in the liquid phase. The deformation of the medium is studied by applying the concept of effective stress. Given the structure of the medium, the displacement of the solid matrix is not taken into account with respect to the displacement of the liquid phase. The transport equations are derived from the model proposed by Narasimhan. The transport coefficients and the relation between the variation in apparent density and effective stress are obtained by test measurements. A numerical model has been established and applied for studying drip moistening of mineral wool samples capable or incapable of deformation.
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    Immunohistochemical characterization of mononuclear cells in delayed hypersensitivity reactions toParacoccidiodes brasiliensis (paracoccidioidin test) (1993)
    Springer
    Mycopathologia 124 (1993), S. 7-11 
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    ISSN: 1573-0832
    Keywords: Delayed hypersensitivity reactions ; Immunohistochemistry ; Paracoccidioidomycosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The density and distribution of T cells, T helper cells, macrophages and B cells at the site of skin tests with a cytoplasmicParacoccidioides brasiliensis antigen (paracoccidioidin) was studied at 24 and 48 h post-challenge in 10 patients with the chronic form of paracoccidioidomycosis and in 5 non-infected individuals. The in situ study was carried out using immunoperoxidase techniques and monoclonal antibodies. The controls showed negative skin test. In the patients, the great majority of the cells in the perivascular foci were T cells (CD43-positive cells) making up 47% and 48.6% of the total number of cells at 24 and 48 h respectively. Most of the T cells showed a T helper phenotype (CD45RO-positive cells). Approximately 25% of the cells were macrophages (CD68-positive cells) and there were very few B lymphocytes (CD20-positive cells). The present data on the microanatomy of paracoccidioidin skin test sites were consistent with a delayed type hypersensitivity pattern. Our results were comparable to those reported on skin tests for other granulomatous chronic diseases.
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    How do non-differentiating bacteria adapt to starvation? (1993)
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    Antonie van Leeuwenhoek 63 (1993), S. 333-341 
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    ISSN: 1572-9699
    Keywords: survival ; starvation ; stress ; Vibrio ; carbon ; nitrogen ; phosphorus ; protein synthesis ; carbon starvation stimulon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Non-differentiating bacteria adapt to starvation induced growth arrest by a complex turn-on/turn-off pattern of protein synthesis. This response shows distinct similarities with those of spore formation in differentiating organisms. A substantial amount of information on the non-growth biology of non-differentiating bacteria can be derived from studies onVibrio strains. One important result is that carbon rather than nitrogen or phosphorus starvation leads to the development of a starvation and stress resistant cell in these organisms. Hence, we have attempted to characterize the carbon starvation stimulon. By the use of two-dimensional gel electrophoresis of pulse-labelled cells and transposon mutagenesis, using reporter gene constructs, the identity and function of some members of the carbon starvation stimulon have been elucidated. Moreover, regulatory genes of the starvation response have been identified with these techniques. Current studies primarily address the identity and function of these genes. The role of transcript modification and stability for both long term persistence during starvation as well as the efficient recovery of cells which occurs upon nutrient addition is also addressed. It is suggested that an understanding of the functionality of the translational machinery is essential for the understanding of these adaptive pathways. This contribution also discusses the diversity of the differentiation-like response to starvation in different bacteria and whether a general starvation induced programme exists.
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    Chlorophyll fluorescence as a tool in plant physiology (1984)
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    Photosynthesis research 5 (1984), S. 139-157 
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    ISSN: 1573-5079
    Keywords: Chlorophyll ; chloroplast ; fluorescence ; energy-distribution ; photochemistry, photosynthesis ; stress
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    Topics: Biology
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    URL: http://dx.doi.org/10.1007/BF00028527
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    Adrenal steroids and plasticity of hippocampal neurons: Toward an understanding of underlying cellular and molecular mechanisms (1993)
    Springer
    Cellular and molecular neurobiology 13 (1993), S. 457-482 
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    ISSN: 1573-6830
    Keywords: adrenal steroids ; plasticity ; hippocampal neurons ; stress ; neuron loss ; glutamate ; serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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    URL: http://dx.doi.org/10.1007/BF00711583
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    The stress-induced reduction in monoamine oxidase (MAO) A activity is reversed by benzodiazepines: Role of peripheral benzodiazepine receptors (1993)
    Springer
    Cellular and molecular neurobiology 13 (1993), S. 593-600 
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    ISSN: 1573-6830
    Keywords: monoamine oxidase (MAO) ; stress ; benzodiazepines ; central benzodiazepine receptors ; peripheral benzodiazepine receptors ; tribulin ; endogenous MAO inhibitors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The effect of benzodiazepine pretreatment on the stress-induced decrease in MAO activity in rat tissues using footshock as stress model was investigated. 2. Animals were injected with vehicle, Lorazepam (1.25 mg/kg), or Clonazepam (0.5 mg/kg) 2 hr before or with PK 11195 (0.45 mg/kg) 2.5 hr before being subjected to one session of 10 inescapable footshocks or to a sham session. At the end of the session animals were sacrificed and MAO A and B activities in hearts and brains were determined. 3. Pretreatment of the animals with both Lorazepam and Clonazepam abolished the decrease induced by footshock in MAO A activity in brain. Pretreatment with Lorazepam but not with Clonazepam abolished the stressinduced decrease in MAO A in the heart. Pretreatment with PK 11195 before Lorazepam reversed its effects in the heart but not in the brain. Neither footshock nor any of the drugs used had any effect on heart and brain MAO B. 4. Our results suggest that in the heart but not in the brain, peripheral benzodiazepine receptors play a role in the regulation of MAO A activity under stress conditions.
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    Molecular basis for the development of individual differences in the hypothalamic-pituitary-adrenal stress response (1993)
    Springer
    Cellular and molecular neurobiology 13 (1993), S. 321-347 
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    ISSN: 1573-6830
    Keywords: hypothalamic-pituitary-adrenal response ; stress ; rats ; handling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Several years ago, investigators described the effects of infantile handling on the development of hypothalamic-pituitary-adrenal (HPA) responses to stress in the rat. Rat pups exposed to brief periods of innocuous handling early in life showed reduced HPA responses to a wide variety of stressors, and the effect persists throughout the life of the animal. These effects are robust and provide an excellent model for understanding how early environmental stimuli, which are external to the organism, alter neural differentiation and, thus, neuroendocrine responsivity to stress. 2. This paper reviews the endocrine mechanisms affected by early handling and our current understanding of the neural transduction of environmental events and their effects at the level of the target neurons (in the hippocampus and frontal cortex). 3. In brief, handling serves to increase glucocorticoid receptor gene transcription, increasing sensitivity to glucocorticoid negative feedback regulation and, thus, altering the activity within hypothalamic corticotropin-releasing factor/vasopressin neurons. Together these changes serve to determine neuroendocrine responsivity to stress.
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    Physiological effects of alarm chemosignal emitted during the forced swim test (1993)
    Springer
    Journal of chemical ecology 19 (1993), S. 2891-2901 
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    ISSN: 1573-1561
    Keywords: Alarm chemosignals ; forced swim test ; depression ; stress ; rat ; Ratus ratus ; electrolytes ; blood gases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Two experiments were conducted. In the first, male rats were immersed for 25 min in fresh water or water previously swum in by another rat. Control rats were not immersed in water. Rats tested in water previously swum in by another rat were significantly less immobile than rats tested in fresh water. Water immersion resulted in significant increases in serum corticosterone, glucose, and phosphorus levels, a decrease in potassium levels, and a higher phosphorus/potassium ratio, compared to nonimmersed controls regardless of water condition. When the two water-immersed groups were compared, rats tested in previously swum water had significantly higher glucose and significantly lower potassium levels and a higher phosphorus/potassium ratio than rats tested in fresh water. Immobility times were significantly correlated with the phosphorus/potassium ratio. In the second experiment, blood gases were measured prior to testing and at 25 min after immersion in rats tested in fresh and previously swum water. Rats in soiled water hypoventilated to a significantly greater extent than rats in fresh water but did not differ significantly in blood oxygenation. These two studies demonstrate that alarm chemosignals can produce physiological effects in conspecifics.
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    Cardioprotective effects of adaptogens of plant origin (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 287-289 
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    ISSN: 1573-8221
    Keywords: adaptogens ; adaptation ; cyclic nucleotides ; stress ; heart
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    Topics: Biology , Medicine
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    β-adrenoreceptors of the cerebral cortex in experimental neurosis (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 371-373 
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    Keywords: brain ; β-adrenoreceptors ; membrane lipids ; free-radical oxidation ; stress ; neurosis
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    Activity of antioxidant enzymes in the limbic reticular structures of rat brain after short-term immobilization (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 683-685 
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    Keywords: stress ; lipid peroxidation ; antioxidant enzymes ; brain structures
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    Mechanisms of immunotropic effects of organophosphorus compounds (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 982-985 
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    Keywords: organophosphorus compounds ; immunity ; stress ; corticosterone ; α-naphthylbutyratesterase
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    Long-term psychoemotional stress: Mutation inductor and mutagenesis modifier in mammals (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1151-1153 
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    Keywords: mutagenesis ; stress ; cytogenetic analysis ; DNA damage
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    Generalized accumulation of stress proteins during the organism's adaptation to stress (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1049-1051 
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    Keywords: stress ; adaptation ; heart
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    Animal resistance to sublethal hypoxia may be raised more by adaptation to stress than by adaptation to hypoxia (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1467-1471 
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    Keywords: adaptation ; stress ; resistance ; hypoxia
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    Concentration of vasopressin in the cerebrospinal fluid and some structural features of the hypothalamo-neurohypophyseal system in stress and aging (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 812-814 
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    Keywords: vasopressin ; cerebrospinal fluid ; neurosecretory cells ; aging ; stress
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    Effect of defensins on the blood level of corticosterone and the immune response during stress (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 728-731 
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    Keywords: defensins ; stress ; immune response ; corticostatic effect
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    Correction of neuroimmune reactions by regulation of lipid peroxidation (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1215-1218 
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    Keywords: stress ; lipid peroxidation ; neurosensitization
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    Elimination of stress-induced changes in the thymus within laser irradiation of the endocrine glands (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1210-1212 
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    Keywords: stress ; laser ; infrared radiation ; thymus ; thyroid gland
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    Normalization of the immune response in old stressed mice by apomorphine (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1421-1423 
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    Keywords: dopaminergic system ; immune respons ; aging ; stress
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    Disturbances of membrane mechanisms during heart stress damage in rats of different strains (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 258-260 
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    Keywords: stress ; arrhythmia ; membrane destabilization ; action potential
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    Effect of adaptation to repeated stress on cardiac function repair and creatine phosphate level restoration following total ischemia (31P-NMR investigation) (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 626-630 
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    Keywords: stress ; ischemia ; adaptation ; reperfusion
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    Behavioral effects of β-casomorphin-7 and its des-Tyr-analogs (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 948-952 
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    Keywords: locomotor activity ; exploratory reaction ; stress ; casomorphins ; opioids
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    Biphasic character of the phenomenon of adaptive stabilization of structures during long-term adaptation of the organism to stress (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1201-1204 
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    Keywords: stress ; adaptation ; resistance ; heart
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    Effect of amiridin and piracetam on memory disturbances induced by experimental stress (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 150-152 
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    Keywords: amiridin ; piracetam ; avoidance response ; memory ; stress
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    Antihypoxic effect of adaptation to stress and of adaptation to electrostimulation: a comparative study (1993)
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    Bulletin of experimental biology and medicine 115 (1993), S. 349-354 
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    Keywords: adaptation ; stress ; resistance ; electrostimulation
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    Antimutagenic effect of adaptation to stress (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1131-1134 
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    Keywords: adaptation ; stress ; hypoxia ; mutagenesis ; bone marrow
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    A morphofunctional study of the hypothalamic postoptic nucleus in rats following hypophysectomy, cooling, or immobilization (1993)
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    Bulletin of experimental biology and medicine 116 (1993), S. 1014-1016 
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    Keywords: hypothalamus ; vasopressinergic cells ; postoptic nucleus ; stress
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  • 88
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    Myoglobin as an indicator of stress-induced damage (1993)
    Springer
    Bulletin of experimental biology and medicine 115 (1993), S. 25-27 
    Details
    ISSN: 1573-8221
    Keywords: myoglobin ; hypoxia ; stress ; adaptation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00846347
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    Myocardial contracility during regression of adaptation to short-term stress (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1625-1627 
    Details
    ISSN: 1573-8221
    Keywords: myocardial contractility ; stress ; adaptation to stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00802934
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    Effect ofSchizandra chinensis lignans on cell division in the corneal epithelium and tongue of albino rats exposed to chronic cold stress (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1706-1708 
    Details
    ISSN: 1573-8221
    Keywords: stress ; pathological mitoses ; DNA synthesis ; Schizandra chinesis lignans ; adaptation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00802961
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    Activation of cell division and nucleic acid synthesis in the corneal epithelium of albino rats by repeated stress (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1717-1718 
    Details
    ISSN: 1573-8221
    Keywords: stress ; nucleic acid synthesis ; mitosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00802964
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  • 92
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    Role of the hypothalamus in inhibition of the pituitary-adrenocortical system by a feedback mechanism (1984)
    Springer
    Bulletin of experimental biology and medicine 97 (1984), S. 538-540 
    Details
    ISSN: 1573-8221
    Keywords: Paraventricular nucleus ; ventromedial nucleus ; corticosteroids ; stress ; feedback
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00808222
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  • 93
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    Differences in the action of typical and atypical tranquilizers on mitochondrial structure and function during emotional-painful stress (1984)
    Springer
    Bulletin of experimental biology and medicine 97 (1984), S. 708-712 
    Details
    ISSN: 1573-8221
    Keywords: tranquilizers ; mitochondria ; stress ; structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00804149
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    Appearance of signs of stress in mice after transplantation of lymphocytes from syngeneic animals after hypokinesia (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1022-1024 
    Details
    ISSN: 1573-8221
    Keywords: stress ; regeneration ; lymphocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01262449
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    The antistressor effect of D-Ala2-Leu5-Arg6-enkephalin (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1086-1088 
    Details
    ISSN: 1573-8221
    Keywords: stress ; enkephalins ; antistressor action
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01262472
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  • 96
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    Effect of isolation stress on the pharmacokinetics of the blood ethanol in rats (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1226-1227 
    Details
    ISSN: 1573-8221
    Keywords: pharmacokinetics ; alcohol ; isolation ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00804306
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    Time course of recovery of the microcirculation after stress (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1324-1327 
    Details
    ISSN: 1573-8221
    Keywords: microcirculation ; vascular permeability ; stress ; mast cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00808178
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  • 98
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    Effect of emotional-painful stress on myocardial contractility in prolonged hypokinesia (1984)
    Springer
    Bulletin of experimental biology and medicine 98 (1984), S. 1620-1622 
    Details
    ISSN: 1573-8221
    Keywords: myocardium ; hypokinesia ; stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00802932
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