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  • Articles  (600)
  • Immunohistochemistry  (600)
  • Springer  (600)
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  • Biology  (600)
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  • Articles  (600)
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  • 1
    Electronic Resource
    Electronic Resource
    Dendritic reticulum cells in AIDS-related lymphadenopathy (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1173-1175 
    Details
    ISSN: 1420-9071
    Keywords: Immunohistochemistry ; immunologic deficiency syndromes ; lymph nodes ; protease inhibitors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary One of two cases of acquired immune deficiency syndrome-related persistent generalized lymphadenopathy revealed a profoundly altered pattern of dendritic reticulum cells as demonstrated by immunoreactive acid cysteine proteinase inhibitor. The alterations could be related to totally or partially destructed lymphoid secondary follicles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951713
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  • 2
    Electronic Resource
    Electronic Resource
    Immunohistochemical localization of types I, II, and III collagens in the ossified posterior longitudinal ligament of the human cervical spine (1983)
    Springer
    Calcified tissue international 35 (1983), S. 159-163 
    Details
    ISSN: 1432-0827
    Keywords: Anticollagen antibodies ; Collagen types ; Immunohistochemistry ; Ossified posterior longitudinal ligament
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Immunohistochemical localization of types I, II, and III collagen in the ossified posterior longitudinal ligament of the cervical spine was studied using type-specific anticollagen antibodies. In contrast to the normal ligament which contains both types I and III collagens, the ossified matrix, composed of lamellar bone, contains only type I collagen, except for Haversian canals where type III is located in the inner wall. In the transitional region of preossifying ligaments, types III and I are both present. Type II collagen is present in the hyperplastic matrix of the ligament, and cartilage-like cells surrounded by type II collagen are aligned along nonossified ligaments adjacent to the preossifying region. A possible mechanism of matrix transition during the ossification process is given attention.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405024
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Peptidergic innervation of leg muscles of the cockroach, Periplaneta americana (L.), and a possible role in modulation of muscle contraction (1995)
    Springer
    Journal of comparative physiology 176 (1995), S. 425-435 
    Details
    ISSN: 1432-1351
    Keywords: FaRPs ; FMRFamide Nervous system Skeletal muscle ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract FMRFamide-related peptides of insects are particularly important because of their possible function as neurohormones and neuromodulators on a wide variety of tissues. Part of this study was an investigation of the immunofluorescent staining of motor nerves which arise in the metathoracic ganglion, examined in wholemount using an antiserum that recognizes extended -RFamide peptides (generally recognized to be of the FMRFamide family). This antiserum revealed immunochemical staining of numerous cell bodies in the metathoracic ganglion and of axons in peripheral nerve 5, a large nerve which contains both motor and sensory fibres. Axons staining positive for FMRFamide-related peptides were traced in nerve 5 as far as the femur-tibia joint, and into the first (sensory-motor) and third (motor only) ramus of nerve 5. Reverse-phase HPLC with radioimmunoassay revealed a peak of FMRFamide-related peptide activity in nerve 5 that was coincident with a peak found when thoracic ganglia were processed in the same fashion. A physiological assay was devised to test the ability of various non-native peptides to alter the characteristics of contraction of skeletal muscles of the legs. Using neurally evoked contractions of coxal depressor muscles of the metathoracic leg it was determined that several non-native peptides could potentiate muscle contractions. The results of this study suggest that muscles of the legs receive innervation by identifiable, FMRFamide-related peptide-containing neurons and that the release of peptide(s) at the muscle may be yet another method of modulating the mechanics of muscle contraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219067
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  • 5
    Electronic Resource
    Electronic Resource
    Genetic depletion of histamine from the nervous system of Drosophila eliminates specific visual and mechanosensory behavior (1996)
    Springer
    Journal of comparative physiology 179 (1996), S. 763-773 
    Details
    ISSN: 1432-1351
    Keywords: Neurotransmitter ; Mutants ; Immunohistochemistry ; Behavior ; Insecta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The role of histamine as a fast neuro-transmitter of imaginai insect photoreceptors is firmly established. In adult Drosophila, histamine is also found in mechanosensory receptors of cuticular hair sensilla and in a small number of nonreceptor neurons in head and body ganglia. Here we investigate the function of histamine by immunohistochemical and behavioral analysis of mutants deficient in the hdc gene that codes for histidine decarboxylase. The allele hdc JK910 appears to be a null mutation, as histamine immunoreactivity is almost entirely eliminated. Homozygous flies are blind in various behavioral paradigms. Mutant larvae, on the other hand, show normal photokinetic responses. Thus, adult Drosophila photoreceptors most likely utilize only a single substance, histamine, as a neurotransmitter, whereas larval photoreceptors apparently employ a different transmitter. With the alleles hdc p211 , hdc p217 , and hdc p218 , variable amounts of histamine are found in photoreceptors and mechanoreceptors, but no histamine could be detected in any of the nonreceptor neurons. These mutants show various degrees of visual and mechanosensory impairment, as determined by quantitative behavioral assays. We conclude that histamine is required for normal function of cuticular hair sensilla and for efficient grooming of the body surface. Thus, in Drosophila, histamine represents a major functional neurotransmitter for mechanosensory receptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207355
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  • 6
    Electronic Resource
    Electronic Resource
    Octopaminergic neurons in the locust brain: morphological, biochemical and electrophysiological characterisation of potential modulators of the visual system (1995)
    Springer
    Journal of comparative physiology 177 (1995), S. 611-625 
    Details
    ISSN: 1432-1351
    Keywords: Cobalt staining ; Gas chromatography-mass spectrometry ; Immunohistochemistry ; Insect ; Neuromodulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The two Protocerebral-Medulla 4 neurons (PM4a and b) in the locust brain have adjacent cell bodies in the medial deutocerebrum. They project through the posterior protocerebrum, forming limited arborisations en route, and enter the lobula and medulla of the ipsilateral optic lobe, where they form extensive, overlapping arborisations. The PM4a and b neurons are octopamine immunoreactive. Their octopamine content (approximately 25 pg per cell) is confirmed by gas chromatography-mass spectrometry; each cell contains approximately 25 pg p-octopamine. Simultaneous intracellular recording from exposed PM4a and b cell bodies reveals that the two cells are physiologically indistinguishable. They receive multimodal sensory inputs. Tactile/mechanosensory stimuli to much of the animal's body and head, acoustic stimuli, and simple visual stimuli all give rise to e.p.s.p.s and action potentials in the PM4 cell body. Simultaneous recording from the cell body in the deutocerebrum and the axon in the lobula demonstrates that action potentials are predominantly initiated in the deutocerebrum and propagate centrifugally, towards the optic lobe. Occasionally, bright light flashes will initiate an action potential in the axon in the optic stalk, which probably propagates bidirectionally: centripetally to the cell body, and centrifugally into the optic lobe. The extensive arborisations in the lobula and medulla are therefore likely to be sites of octopamine release. Because PM4 neurons are octopaminergic, project to the optic lobe, and receive modalities of sensory input known to dishabituate the Descending Contralateral Movement Detector (DCMD) visual interneuron, it is proposed that PM4 neurons are neuromodulatory — mediating dishabituation or arousal of the visual system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207190
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  • 7
    Electronic Resource
    Electronic Resource
    Immunohistochemical detection of subunit A(M) of lactate dehydrogenase in tissues of the developing chick (1986)
    Springer
    Development genes and evolution 195 (1986), S. 409-416 
    Details
    ISSN: 1432-041X
    Keywords: Immunohistochemistry ; Tissue distribution of LDH5 ; Developing chicken embryos
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of A(M) subunits of lactate dehydrogenase (mainly LDH5) in developing muscle, heart, liver, lung, kidney and cartilage tissue of chicken embryos was examined by the indirect fluorescent antibody technique. Antibodies against porcine LDH5, purified by affinity chromatography, were used for this purpose. In special areas of newly formed myofibrils in somitic myoblasts fluorescence was already detected after 4 days of incubation, and located at the same place in muscle tissue of all advanced developmental stages examined. During the myotube stage of muscle development staining was also located in the peripheral thickened cytoplasma of the myotubes. The myocardium did not exhibit any fluorescent staining in the developmental stages examined. Endocardium, epicardium and pericardium, however, were fluorescent in young developmental stages. The liver showed fluorescence in 5- to 8-day embryos mainly in the endothelial cells of the blood sinusoids. In 9- to 12-day embryos the bile ducts became fluorescent. In lungs after 9- to 12-day development the epithelium and the surrounding tissues of bronchi exhibited strong immunofluorescence. The mesonephros exhibited faint granular fluorescence in tubule-forming cells and their membranes after 4–9 days of incubation. Advanced developmental stages only exhibited fluorescent blood cells. This latter staining is at least partly due to non-specific reactions of blood cell membranes with FITC-conjugated anti-rabbit IgG. Cartilage is characterized by non-specific fluorescence, but in embryos older than 8 days strong granular fluorescence of chondrocytes and staining of the perichondrium distinguished sections treated with anti-LDH5 antibodies from control sections reacted only with FITC-conjugated anti-rabbit IgG. In addition, strong fluorescent staining was detectable in certain areas of the 5-day neural tube and faint staining in the mucosa of the intestine from embryos older than 10 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00375745
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  • 8
    Electronic Resource
    Electronic Resource
    Uteroglobin and the accumulation of progesterone in the uterine lumen of the rabbit (1981)
    Springer
    Development genes and evolution 190 (1981), S. 127-131 
    Details
    ISSN: 1432-041X
    Keywords: Uteroglobin ; Radioimmunoassay ; Progesterone ; Osmotic minipumps ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This study was undertaken to determine whether the influx of progesterone into the uterine lumen of the rabbit, in the preimplantation period, is dependent onuteroglobin (UGL). Rabbits were ovariectomized and, three months later, treated with two defferent doses of progesterone. Purified UGL was injected into one uterine horn and, as a control,immunoglobulin G (IgG) was injected into the other. After four days, the animals were sacrificed their uteri flushed, and the progesterone content of the washes was determined by radioimmunoassay. Animals with the lower serum progesterone level (2.8 ng/ml) had a significantly different uterine horn progesterone content. The hormone accumulation in the horn containing UGL was 2.3 to 7.5 times higher than in the horn containing IgG. Animals with a higher serum progesterone level (7.2 ng/ml) showed no differences. The hormone content was equally high in both horns, presumably due to the synthesis of endogenous UGL being reactivated by the hormone treatment. The validity of these experiments as models for the events during early pregnancy and the physiological role of progesterone available inside the uterus are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00867797
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  • 9
    Electronic Resource
    Electronic Resource
    Guanosine 3′,5′-monophosphate in bone: Microscopic visualization by an immuno-histochemical technique (1977)
    Springer
    Calcified tissue international 24 (1977), S. 73-79 
    Details
    ISSN: 1432-0827
    Keywords: Bone cells ; Cyclic GMP ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Guanosine 3′,5′-monophosphate (cyclic GMP, cGMP) was localized in bone cells by the use of an immunoglobulin-enzyme bridge method. We observed that in cat alveolar bone most osteoblasts did not stain for cGMP, while adjacent periodontal cells displayed cytoplasmic as well as nuclear staining. Numerous osteocytes contained diffuse reaction products over most or all of the cellular area. The method used in this study may be helpful in identifying specific hard tissue cell types whose function(s) involve cGMP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02223299
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  • 10
    Electronic Resource
    Electronic Resource
    Immunohistochemical characterization of the small proteoglycans decorin and proteoglycan-100 in heterotopic ossification (1994)
    Springer
    Calcified tissue international 54 (1994), S. 119-124 
    Details
    ISSN: 1432-0827
    Keywords: Decorin ; Proteoglycan-100 ; Heterotopic ossification ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract Heterotopic ossification is a metabolically active process which shares several properties of orthotopic bone formation and, therefore, represents an excellent model for studying bone matrix components. Immunohistochemical methods were used to investigate the distribution pattern of the small proteoglycans decorin and proteoglycan-100 during different stages of heterotopic ossification of pressure sores of paraplegic patients. Decorin and proteoglycan-100 exhibited a substantially divergent distribution pattern. Decorin was detectable in the perivascular matrix of granulation tissue as well as in the stroma of heterotopic ossification. The ossification zone was stained most strongly. In contrast, proteoglycan-100 was predominantly detectable in fibroblasts and preosteoblasts in early areas of osteogenesis. In more mature forms of heterotopic ossification immunostaining was markedly reduced in osteoblasts and osteocytes and even absent in so-called bone-lining cells. However, at least some osteoclasts were strongly positive. These results suggest indicate that decorin and proteoglycan-100 are important components during the formal pathogenesis of heterotopic ossification. The expression of the small proteoglycans, especially of proteoglycan-100, correlates with different phases during heterotopic ossification, showing a maximum for proteoglycan-100 in matrix-forming cells in early phases of bone formation, but in osteoclasts in mature bone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296062
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