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  • Articles  (135)
  • Male  (108)
  • Rat
  • 1980-1984  (135)
  • 1982  (135)
  • Biology  (135)
  • Electrical Engineering, Measurement and Control Technology
  • Energy, Environment Protection, Nuclear Power Engineering
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  • Articles  (135)
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  • 1980-1984  (135)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 34 (1982), S. 211-213 
    ISSN: 1432-0827
    Keywords: Rat ; incisor ; ameloblasts ; enamel ; 45Ca autoradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Rats were injected with45Ca and horseradish peroxidase to determine the patterns of45Ca incorporation into incisor enamel and the morphological types of the overlying maturation ameloblasts.45Ca autoradiography showed no differences in the patterns of incorporation into enamel between routinely embedded and freeze-dried specimens. Enamel overlaid by ruffle-ended ameloblasts was much more heavily labeled while that overlaid by smooth-ended ameloblasts showed only moderate labeling. The observations lend further support to the hypothesis that the ruffle-ended cells are very active in mineralizing enamel and that the smooth-ended cells are in a passive, restorative phase.
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  • 2
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    Calcified tissue international 34 (1982), S. 376-381 
    ISSN: 1432-0827
    Keywords: Matrix vesicles ; Bone ; Actin ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Preliminary indications of the occurrence of actin and myosin in crude matrix vesicle preparations have been reported previously. In the present study extracellular matrix vesicles from rat alveolar bone were isolated. They were further purified by a sucrose density gradient. SDS-polyacrylamide gel electrophoresis of the purified vesicles revealed the presence of a polypeptide with a molecular weight of 43 K daltons and with electrophoretic mobility identical to that of blood platelet actin. The limited proteolysis of both 43 K dalton vesicular polypeptide and actin byStaphylococcus aureus-V8-protease revealed three fragments with identical electrophoretic mobility. In addition, the vesicular preparations inhibited the activity of DNase I, a property typical of actin monomers. Filamentous material extracted from matrix vesicles showed ultrastructural features of F-actin. Reaction of this material with heavy meromyosin resulted in arrowhead formation, which is characteristic of acto-heavy meromyosin. The occurrence of actin in extracellular matrix vesicles may account for their budding from the osteoblastic plasma membrane, their possible motility in the matrix, and maintenance of the spherical shape.
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  • 3
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    Cell & tissue research 225 (1982), S. 229-234 
    ISSN: 1432-0878
    Keywords: Preovulatory follicle ; Cell division ; Age ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pattern of follicular development during the estrous cycles of aged rats was examined and compared with that of mature rats. In both, preovulatory follicles are derived from a select group of small pre-Graafian follicles which begin to develop at estrus and reach the preovulatory size by the morning of proestrus, but the rate of growth, as judged by an increase in the percentage of granulosa cells incorporating 3H-thymidine, is accelerated in the follicles of aged rats. A second mechanism, which accounts for preovulatory follicles in aged rats, involves the rescue from atresia of pre-Graafian and preovulatory follicles. The existence of this mechanism is supported by the observation that at metestrus in aged rats virtually all follicles, regardless of their state of atresia, possess a high percentage of granulosa cells incorporating 3H-thymidine, indicating that the follicles are growing rapidly. However, some of these rapidly growing follicles show signs of atresia such as pyknotic nuclei within their granulosa cell layers. Since follicles in the initial stage of atresia contain defective oocytes (Peluso et al. 1979b), their rescue and development into preovulatory follicles would result in the ovulation of defective oocytes, a fact which accounts in part of the lower fertility in these older animals.
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  • 4
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    Cell & tissue research 225 (1982), S. 469-485 
    ISSN: 1432-0878
    Keywords: Microglial cells ; Postnatal development ; Enzyme histochemistry ; NDPase, TPPase ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The postnatal development of microglial cells was investigated in the neonatal rat brain by use of light- and electron microscopy, including enzyme-histochemical techniques. Microglial cells were selectively stained by demonstration of their nucleoside diphosphatase (NDPase) activity and classified into three types: 1) In the early postnatal period, “primitive microglial cells” showing scantily ramified processes were found in the cerebral cortex, the hippocampal formation, and the hypothalamus. During the course of the first postnatal week the processes of this cell type developed gradually and the cells were transformed into typical ramified microglial cells, called “resting microglial cells”. 2) “Amoeboid microglial cells” showing typical features of macrophages were characteristic of the cerebral white matter. 3) “Round microglial cells” possessing a round soma and few pseudopodia but no characteristic processes occurred in large numbers in the sub ventricular zone of the lateral ventricle and as single elements in the vicinity of blood vessels. Histochemically, thiamine pyrophosphatase (TPPase) was demonstrated only in the fully developed, ramified microglial cells (“resting microglial cells”), which could be readily observed in the central nervous tissue from the age of 14 day. “Round and amoeboid microglial cells” did not show TPPase activity and disappeared after 14 days of postnatal life. By use of electron microscopy, in neonatal rats NDPase activity was apparent in the plasma membrane of the three types of microglial cells (“primitive, round, and amoeboid” types). They showed basically similar submicroscopic characteristics, i.e., well-developed Golgi apparatus, long strands of roughsurfaced endoplasmic reticulum, single dense bodies and vacuoles, and numerous ribosomes. “Amoeboid microglial cells” were characterized by their well-developed cytoplasmic vacuoles and phagocytic inclusion bodies. The present study strongly suggests a mesodermal origin for these microglial elements.
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  • 5
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    Cell & tissue research 222 (1982), S. 359-378 
    ISSN: 1432-0878
    Keywords: Axon terminals ; Substantia gelatinosa ; Spinal cord ; Noradrenaline ; Ultrastructure ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The noradrenergic terminals in the substantia gelatinosa of the dorsal horn of the cervical spinal cord of the rat were investigated by means of the histofluorescence technique and electron-microscopic cytochemistry using the glyoxylic acid-KMnO4 fixation technique. In accordance with the topographical distribution of fluorescent catecholaminergic fibers, noradrenergic terminals containing small granular vesicles were frequently observed electron microscopically in the outer layer of the substantia gelatinosa. These terminals were most frequently found to appose without showing typical synaptic features, small-caliber dendrites, spine apparatus, and rarely, large caliber dendrites. Only in a few cases, the noradrenergic terminals exhibited typical synaptic contacts with dendritic elements of small size. In addition, noradrenergic terminals apposed non-noradrenergic terminals containing small agranular vesicles. In rats bearing surgical lesions of the dorsal roots, no noradrenergic terminal were found in contact with the degenerated axon terminals in the substantia gelatinosa. These findings suggest that the noradrenergic afferents to the substantia gelatinosa may exert their influence on sensory transmission via dorsal horn cells.
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  • 6
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    Cell & tissue research 222 (1982), S. 629-634 
    ISSN: 1432-0878
    Keywords: Calcitonin cells ; Anomaly ; Thymus ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In a study of the effect of pinealectomy on thyroid C-cell number, 8 animals out of 66 were found to have thymic tissue in close association with the thyroid. Cells containing immunoreactive calcitonin were found in all of the thyroids but in only one of the 8 pieces of thymus. These cells found in a piece of thymic tissue associated with the right thyroid lobe were located immediately under the capsule and did not form or associate with follicles. Unlike the other animals the rat with thymic calcitonin cells had an unequal distribution of C-cells between the left and right thyroid lobes, but the total number of thyroidal C-cells was the same as that of the other rats. Since the thymus proper was not examined in these 66 animals, ten additional rats were taken for such a study. Thyroid-associated thymic tissue was found in three of these, but none of these thymi showed any immunoreactive cells.
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  • 7
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    Cell & tissue research 222 (1982), S. 691-693 
    ISSN: 1432-0878
    Keywords: Jugular vein ; Histochemistry ; Adrenergic innervation ; Cholinergic innervation ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The autonomic innervation of rat jugular vein was studied using glyoxylic acid fluorescence and acetylcholinesterase histochemical methods. The rat jugular vein is provided with both adrenergic and cholinergic nerve fibers organized in plexuses located at the adventitial-medial border. The existence of these nerve plexuses does not seem to support biochemical findings that suggest a lack of innervation in the rat jugular vein and which propose this blood vessel as a model for the analysis of drug-smooth muscle cell interaction without the interference of neuronal uptake mechanisms.
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  • 8
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    Cell & tissue research 223 (1982), S. 493-506 
    ISSN: 1432-0878
    Keywords: Microglial cells ; TPPase ; NDPase ; Synapse ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Electron-microscopic survey of selectively stained microglial cells in the cerebral cortex of the rat reveals that the processes of this cell type often encircle axo-dendritic synapses. Enzyme-histochemical methods for thiamine pyrophosphatase (TPPase) or nucleoside diphosphatase (NDPase) were used for the selective marking of the microglial cells; TPPase and NDPase activities were observed in the plasma membrane of microglial cells. The synapses encircled by microglial processes displayed presynaptic structures containing round clear vesicles (50 nm in diameter) and a prominent thickening of the postsynaptic membrane. In vitro, the above-mentioned enzymatic activities were completely suppressed by neuroactive agents such as catecholamines and phenothiazine derivatives. Examination using enzyme-histochemical techniques suggests that a single enzyme may be responsible for both above-mentioned enzymatic reactions. The functional significance of microglial cells in the normal central nervous tissue is discussed.
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  • 9
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    Cell & tissue research 223 (1982), S. 603-614 
    ISSN: 1432-0878
    Keywords: Kidney ; Medullary collecting duct ; Rat ; Rabbit ; Tight junctions ; Freeze ; fracture electron microscopy ; Urinary concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The tight junctions along the medullary collecting duct in the kidneys of the rat and the rabbit were studied with freeze-fracture electron microscopy and quantitated according to the number of strands and the apico-basal depth (nm) of the junctions. The most elaborate tight junctions were found in the inner stripe of the outer medulla; rat: 10.6±0.8 strands and 205±24nm; rabbit: 11.6±2.4 strands and 291±55 nm. The elaboration of the tight junctions decreased continuously towards the papillary tip. Inner zone I; rat: 9.3±2.6 strands and 186±38nm, rabbit: 9.5±2.3 strands and 247±59nm. Inner zone II; rat: 7.1±2.2 strands and 129±32nm, rabbit: 8.5±1.4 strands and 199±26nm. Inner zone III; rat: 6.0±1.6 strands and 111 + 19 nm, rabbit: 7.0±1.5 strands and 183±43 nm. In the inner zone III comprising the papillary tip tight junctions with only 1–3 strands were not infrequently seen. Preliminary findings in the kidney of the golden hamster indicate a similar decline of junctional tightness along the collecting duct. These morphological observations suggest that the permeability of the paracellular pathway of the medullary collecting duct increases towards the tip of the papilla, especially in the rat. The functional implications for the medullary recycling of urea and electrolytes, and for the urinary concentrating mechanism are discussed. In addition, the tight junctions of the papillary epithelium are described.
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  • 10
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    Cell & tissue research 223 (1982), S. 695-698 
    ISSN: 1432-0878
    Keywords: Pineal gland ; Luteinizing hormone-releasing hormone (LHRH) ; Immunocytochemistry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Immunoreactive luteinizing hormone-releasing hormone (LHRH)-like material has been demonstrated in the pineal gland of the adult rat. The objective of the present study was to examine the ontogenetic development of this LHRH-like substance in the rat pineal with the peroxidase-antiperoxidase (PAP) method of Sternberger. LHRH-like immunoreactive material was not observed in pineal glands of newborn rats. The amount of material increased progressively from the 6th–12th day of postnatal development. On day 12, the amount of LHRH-like immunoreactivity was consistent and comparable in all pineal glands of male and female animals examined.
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  • 11
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    Cell & tissue research 224 (1982), S. 195-206 
    ISSN: 1432-0878
    Keywords: Pinealocytes ; Nucleolus ; Rat ; Ultrastructure ; Twenty-four-hour changes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An ultrastructural and morphometric analysis was made of the nucleolar components in pinealocytes of 40 male Fischer rats sampled at eight times in an LD 12∶12 photoperiod cycle. Comparisons of results from the eight times showed variation in estimated mean volume of the granular component of ±29%, and of the fibrillar component ±11%, in relation to daily means. Peaks in mean volume of total nucleolus and its granular component occurred at 1 h of light. Near maximal and minimal mean volumes of the fibrillar component both occurred during both light and dark. Fibrillar centers (nucleolar organizer regions) of different sizes were found at all sampling times. It is concluded that temporal patterns in 24-h changes in the nucleolar components are most prominent in the granular component, and are more complex than suggested by changes in total nucleolar size or mean dimensions, and than represented by a simple biphasic circadian rhythm. Examples of different stages in the migration of the granular component, and of possible sites of nucleo-cytoplasmic transfer of nucleolar material, are described.
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  • 12
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    Cell & tissue research 224 (1982), S. 647-653 
    ISSN: 1432-0878
    Keywords: hCG binding sites ; Endocytosis ; Ovary ; Ultrastructural immunocytochemistry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Localization of hCG binding sites and the process of endocytosis in pseudopregnant rat ovaries were investigated by indirect electron-microscopic immunocytochemistry. Immature female rats were treated with pregnant-mare serum gonadotropin (PMSG) and human chorionic gonadotropin (hCG) to induce ovarian luteinization. Eight days after priming with PMSG-hCG and 1–6 h before sacrifice the animals were given another injection of hCG to bind the receptors. Receptor sites to hCG localized by reaction product were present in most luteal cells, but not in primary follicular cells. The receptor sites were distributed on luteal cell surfaces facing interstitial spaces. Endocytotic pits containing hCG binding sites were rarely seen 1 h after hCG injection. At 2 h, hCG and presumably its receptor were taken up within endocytotic vesicles with the evidence of reaction product coated on the vesicle wall. With time, fusion of endocytotic vesicles with lysosome occurred and the reaction product appeared in phagolysosomes. The reaction product was localized on phagolysosomal inner surface or in free granular form. These findings suggest that hCG and its receptors were internalized through endocytotic pits and endocytotic vesicles and delivered to lysosomes probably for degradation. An additional experiment for localization of acid phosphatase was also performed to delineate the lysosomes and phagolysosomes.
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  • 13
    ISSN: 1432-0878
    Keywords: Pudendal nerve ; Sensory neurones ; Spinal ganglion ; Transganglionic labelling (HRP) ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The morphology and distribution of the sensory neurones of the pudendal nerve within the spinal ganglia of rats were investigated by use of horseradish peroxidase (HRP). The labelling was visualized in diaminobenzidine (DAB) or tetramethyl-benzidine (TMB)-stained sections. Injection of HRP directly into the pudendal nerve labelled perikarya predominantly in the sixth lumbar DRG (L6). Following injection of HRP into the scrotal skin, however, additional cells were labelled in L5 and SI. Labelling was invariably unilateral. Approximately equal numbers of small (〈30 μm) and large neurones (〉40 μm) were labelled following subcutaneous injections although injections into the nerve marked twice as many small cells as large cells. This suggests that, in the rat, most of the small-diameter fibres within the pudendal nerve ascend through L6. Although a cluster of neurones was observed in one experiment, the remaining 25 experiments did not reveal any somatotopic arrangement since the labelled perikarya were distributed evenly throughout the ganglion. Similar numbers of retrogradely labelled neurones (somatopetal transport of the tracer) were observed in both DAB- and TMB-stained sections, although TMB allowed the demonstration of anterograde (somatofugal) HRP transport by terminal labelling in the superficial laminae of the lumbar spinal cord, extending into laminae II–IV.
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  • 14
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    Cell & tissue research 227 (1982), S. 93-112 
    ISSN: 1432-0878
    Keywords: Neurophysins ; Immunocytochemistry ; Age-dependent changes ; Hypophysectomy ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The hypothalamo-extrahypophyseal neurophysin pathways (HEH) and the three hypothalamic nuclei secreting neurophysins, the supraoptic (SON), paraventricular (PVN) and suprachiasmatic (SCN) nuclei, of normal and hypophysectomized rats were studied by application of the immunoperoxidase procedure. Eight well-defined HEH pathways were recognized. Their main sites of projection were: lateral septum and subfornical organ (1 and 2); tractus diagonalis (3); medial nucleus of the amygdala and lateral ventricle (4); nucleus periventricularis thalami, nucleus habenulae lateralis and periaqueductal gray (5); periaqueductal gray, pineal organ, collicular recess and subependymal region of the fourth ventricle (6); dorsomedial nucleus and premammillary area (7); perimammillary region, corpus trapezoideum, ventral surface of medulla oblongata, nucleus tractus solitarii, nucleus commissuralis, substantia gelatinosa and formatio reticularis lateralis of the medulla oblongata and spinal cord (8). Neurophysin fibers of unknown origin were found in the frontal cerebral cortex. It was noted that in pathway 5 the amount of immunostainable material undergoes changes with age. The three neurophysin-secreting nuclei reacted differently following hypophysectomy. Among the HEH pathways the only one that seemed to be affected by hypophysectomy was that innervating the lateral septum. It is suggested that the neurons that survive hypophysectomy either do not project to the neural lobe or, alternatively, display axon collaterals projecting outside the neural lobe. Such a neuronal population could be the origin of the HEH pathways.
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  • 15
    ISSN: 1432-0878
    Keywords: Luteinizing hormone ; releasing hormone ; Immunocytochemistry ; Distribution ; Forebrain ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The distribution of luteinizing hormone-releasing hormone (LHRH)-immunoreactive perikarya and processes was examined, in the untreated rat, with the unlabeled antibody enzyme method of immunocytochemistry on thick 50 μm vibratome sections. LHRH neurons were primarily observed in the preoptico-anterior hypothalamic and septal areas. Projections from these cell bodies to the median eminence form three distinct pathways, one laterally along the course of the optic tracts, one medially through the periventricular stratum of the third ventricle, and one through the tractus infundibularis. In addition, some of these cell bodies project to the organum vasculosum of the lamina terminalis (OVLT) and the subfornical organ (SFO). LHRH immunoreactive neurons were also noted in the anterior olfactory regions; they project along the medial olfactory tract to the olfactory bulb.
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  • 16
    ISSN: 1432-0878
    Keywords: Splenic implants ; Non-lymphoid cells ; Trapping ; Enzyme histochemistry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Regeneration of splenic tissue after autologous subcutaneous implantation provides a useful model for studying the development of splenic tissue. The development of the various non-lymphoid cells of the white pulp in the rat is described. It appears that regeneration of the implants is initiated by ingrowing vessels and a newly formed reticulum, which forms the microenvironment for the homing lymphocytes. Marginal metallophils are found at their characteristic location at the inner border of the marginal sinus five weeks after implantation. Trapping of antigen-antibody complexes reappears when the first primary follicles can be recognized.
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  • 17
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    Cell & tissue research 222 (1982), S. 223-226 
    ISSN: 1432-0878
    Keywords: Kainic acid ; Reactive microglia ; Autoradiography ; Hippocampus ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Autoradiographic studies showed that in the rat hippocampus “microglia-like reactive cells” (MRC) and astrocytes are capable of proliferation in response to kainic acid (KA)-induced lesions. A marked increase in the number of labeled MRC was observed during the first four days after the induction of the KA-lesion. A proliferative response of astrocytes occurred at two days after the KA-lesion. After the induction of a KA-lesion brain macrophages and oligodendrocytes were only slightly labeled with 3H-thymidine. It appears likely that MRC is the main cellular element responding to this type of lesion.
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  • 18
    ISSN: 1432-0878
    Keywords: Uterus ; Epithelial cells ; Tight junctions ; Pregnancy ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of tight junctions between uterine luminal epithelial cells of the pregnant rat was studied by the freeze-fracture technique. On day 5 of pregnancy, the day of implantation, the region of tight junctions extended three times as far down the lateral cell membrane as on day 1 of pregnancy, and the strands of the complex interlinked more frequently. These observations suggest that tight junctions on day 5 may be more efficient in preserving the contents of the uterine lumen from dilution or escape than at earlier times of pregnancy.
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  • 19
    ISSN: 1432-0878
    Keywords: Cholecystokinin ; Spinal cord ; Immunocytochemistry ; Rat ; Neuropeptides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cholecystokinin-like immunoreactivity has been demonstrated by radioimmunoassay and immunocytochemistry in the spinal cord of various mammals, in particular in nerve fibers of the superficial layers of the posterior column, but had not been detected in neuronal cell bodies. We report immunohistochemical evidence for the presence of a group of cholecystokinincontaining neuronal cell bodies in the lumbar spinal cord of the rat. This group of cells is only visualized after direct injection of colchicine into the spinal cord and is located near the central canal in the intermedio-medial nucleus of area X of Rexed.
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  • 20
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    Cell & tissue research 224 (1982), S. 25-31 
    ISSN: 1432-0878
    Keywords: Spleen ; Ig-containing cells ; Immunocytochemistry ; Germinal center ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The morphology and localisation of IgM- and IgG-containing cells in the spleen of rats immunized with sheep red-blood cells (SRBC) were studied by combining immunohistochemical reactions with routine histological and histochemical methods. It was shown that IgM cells occur only in the outer periarteriolar lymphocyte sheath (PALS), whereas IgG cells are present throughout the whole PALS. It has been concluded that these cell types have different routes of migration. Both IgM- and IgG-containing cells were found in the germinal center in close relation with the extracellular immune complexes. The significance of this localisation is discussed.
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  • 21
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    Cell & tissue research 224 (1982), S. 247-267 
    ISSN: 1432-0878
    Keywords: Serotonin ; Brainstem ; Immunohistochemistry ; Rat ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The morphological characteristics and distribution of the somata of serotonin-containing neurons in the brainstem of rats and cats were studied by use of the peroxidase-anti peroxidase (PAP) immunohistochemical method employing highly specific antibodies to serotonin. Antibodies were raised in rabbits against an antigen prepared by coupling serotonin to bovine thyroglobulin and using formaldehyde as the coupling reagent. The distribution pattern of serotonin neurons observed in the present material is essentially in agreement with that described by other investigators who used the Falck-Hillarp method. In addition, this immunohistochemical technique revealed serotonin-containing perikarya in the following regions: 1) the periaqueductal gray, especially lateral to the nucleus raphe dorsalis, 2) the nucleus interpeduncularis, 3) the nucleus parabrachialis ventralis and dorsalis, 4) the field of the lemniscus lateralis, and 5) the reticular formation of the pons and medulla oblongata. The described immunohistochemical procedure makes it possible to study central serotonin neurons in detail without pharmacological pretreatment. The wide distribution of serotonin neurons demonstrated in this study should be considered when interpreting experiments dealing with the serotonin system.
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  • 22
    ISSN: 1432-0878
    Keywords: ACTH/β-endorphin neurons ; Synapse ; Hypothalamus ; Immunohistochemistry ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the preinfundibular portion of male rat hypothalamus, the arcuate-median eminence region was examined after staining with anti-porcine ACTH 1-39 serum. In several cases, anti-β-endorphin serum was also employed. Both sera stain the same cell bodies. The cell bodies of the immunoreactive neurons are scattered in the subependymal layer, arcuate nucleus and lateral tuberal region. Fibers originating from these cell bodies are distributed extensively throughout these regions. They make synaptic contacts on immunonegative fibers in the arcuate nuclei, or terminate directly in the perivascular space in the internal layer of the median eminence. The fibers, however, are very scarce in the external layer of the median eminence, and do not directly terminate on the neurovascular contact surface. These findings suggest that the ACTH/β-endorphin neuronal system may serve neuronally and humorally as an intrahypothalamic constituent of the hypothalamic pituitary regulation system.
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  • 23
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    Cell & tissue research 224 (1982), S. 455-458 
    ISSN: 1432-0878
    Keywords: Intravagal paraganglia ; Paraganglion supracardiale vagi ; Recurrent nerve ; Vagus nerve ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the Ham-Wistar rat, a paraganglion was found within the vagus nerve at the site of branching of the recurrent laryngeal nerve. Due to its location the name “paraganglion supracardiale vagi” is suggested. Fluorescence microscopy of the paraganglionic cells displays an intense yellow-green fluorescence indicating the presence of biogenic amines. Ultrastructurally, chief cells containing dense-core vesicles form three kinds of synaptic contacts (afferent, efferent and reciprocal) with enlarged, mitochondria-rich nerve endings.
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  • 24
    ISSN: 1432-0878
    Keywords: Rat ; Cold adaptation ; Skeletal muscle ; Mitochondria ; Fat ; Morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Growing rats (4 weeks old) were kept for 3 weeks at 11° C and 24° C respectively. The cold-adapted animals showed a significantly higher oxygen consumption (64%). Volume density of subsarcolemmal and interfibrillar mitochondria as well as volume density of fat droplets were estimated in M. soleus and the diaphragm of both groups. In cold-adapted animals, the total volume of mitochondria was significantly increased by 24% in diaphragm and 37% in M. soleus. The volume of subsarcolemmal mitochondria was almost doubled in each muscle, but the volume of interfibrillar mitochondria did not change significantly. The surface of the inner mitochondrial membranes per unit volume of mitochondrion in M. soleus was significantly increased both in interfibrillar and subsarcolemmal mitochondria, whereas the surface of the outer mitochondrial membranes per unit volume of mitochondrion was increased only in the subsarcolemmal mitochondria. The volume of fat droplets in the diaphragm and M. soleus of cold adapted animals increased significantly by 62% and 150% respectively.
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  • 25
    ISSN: 1432-0878
    Keywords: Monoadrenalectomy ; Compensatory adrenal growth ; Zona fasciculata ; Rat ; Stereology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructural changes associated with the compensatory hypertrophy of the zona fasciculata cells on monoadrenalectomized rats were investigated by stereological techniques. It was found that these subcellular changes display a different pattern from those underlying the ACTH-induced adrenocortical cell growth in the intact rats. This result supports the view that compensatory adrenal hypertrophy does not involve activation of the hypothalamo-hypophyseal-adrenal axis.
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  • 26
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 226 (1982), S. 1-12 
    ISSN: 1432-0878
    Keywords: Serotonin-immunoreactive nerve fibers ; Cerebellum ; Cat ; Rat ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The localization of serotonin (5-HT)-immunoreactive nerve fibers in the cerebellum of the rat and cat was investigated by means of the peroxidase-anti-peroxidase (PAP) method using highly specific antibodies to 5-HT. Serotonin-containing nerve fibers were distributed throughout the entire cerebellum including the deep cerebellar nuclei, while 5-HT-positive neuronal somata were not detected in the cerebellum of either species. A different pattern of 5-HT innervation was found among the three layers of the cerebellar cortex. There were also interspecific differences in the pattern of distribution of 5-HT. In the rat, the pool of 5-HT nerve fibers mainly consisted of tangential elements, which were predominant in the molecular layer, while in the cat only a few 5-HT fibers were found in the molecular layer of the cerebellar cortex; dense networks of 5-HT nerve fibers were present in the granular layer. Some differences are evident in the pattern of distribution of 5-HT fibers in cerebellar regions classified on an anatomical and functional basis.
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  • 27
    ISSN: 1432-0878
    Keywords: Carotid body ; Glomus cells ; Endocytosis ; Cationized ferritin ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Glomus cells from carotid bodies of adult rats dissociated by means of collagenase or collagenase + trypsin were used to study by electron microscopy the endocytotic uptake of cationized ferritin (CF) tracer into subcellular compartments. The glomus cells were incubated with the tracer (1) in a basic salt medium (BM), or (2) in the BM into which calcium ionophore A23187 had been added, or (3) in a potassium-rich medium. Incubation of the cells in BM containing CF for 30 min resulted in attachment of the tracer to the cell membrane and uptake of a few solitary tracer particles into small vesicles and multivesicular bodies. No uptake into the cisternae of the Golgi apparatus was observed. Further incubation in BM containing CF for another 30 min resulted in increased uptake of the tracer into small vesicles and multivesicular bodies. A similar pattern of uptake was observed when the dissociated glomus cells were first preincubated in BM with CF for 30 min and then incubated for 1 min or 30 min in the BM solution containing both the ionophore and CF. Upon such incubation, CF particles were seen to penetrate into coated pits and sites of exocytosis at the cell surface. When the 30-min preincubation in BM was followed by incubation in a CF-containing potassium-rich medium for 15–30 min, uptake into vesicles, small lysosomes and occasionally also into profiles of the smooth endoplasmic reticulum was seen. Endocytotic mechanisms of the glomus cells are outlined.
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  • 28
    Publication Date: 1982-10-08
    Description: Sounds recorded in Dallas at the time of the assassination of John F. Kennedy were analyzed by two research groups, whose reports formed the basis for the opinion that two gunmen fired at President Kennedy. These reports and the acoustic evidence have been studied by the Committee on Ballistic Acoustics, and further acoustic analyses, including sound spectrograms, have been performed. The committee finds that the acoustic data do not support a conclusion that a second gunman was involved in the assassination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1982 Oct 8;218(4568):127-33.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6750789" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustics ; *Famous Persons ; *Forensic Medicine ; History, 20th Century ; Humans ; Male ; Texas ; *Wounds, Gunshot
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  • 29
    Publication Date: 1982-10-29
    Description: Exposure of rats to cimetidine during intrauterine life and the immediate neonatal period results in hypoandrogenization in adult life with decreased weights of androgen-dependent tissues and decreased concentrations of testosterone. Moreover, sexual behavior patterns in adult life are disturbed as shown by a lack of sexual motivation and decreased performance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anand, S -- Van Thiel, D H -- New York, N.Y. -- Science. 1982 Oct 29;218(4571):493-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123252" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced/*etiology ; Animals ; Animals, Suckling ; Cimetidine/metabolism/*toxicity ; Female ; Guanidines/*toxicity ; Male ; Pregnancy ; Pregnancy, Animal/drug effects ; Rats ; Sex Differentiation/*drug effects ; Sexual Behavior, Animal/drug effects
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  • 30
    Publication Date: 1982-01-08
    Description: (+/-)-N-Allylnormetazocine is a benzomorphan opioid with psychotomimetic effects. The pure stereoisomers of this compound, as well as the racemic mixture, were compared to phencyclidine for their behavioral effects on squirrel monkeys and rats trained to discriminate phencyclidine from saline. Dose-response determinations were made for responses to phencyclidine, to a racemic mixture of N-allylnormetazocine, and to the pure levo and dextro isomers of N-allylnormetazocine. In both rats and monkeys, the dextro isomer and the racemic mixture produced dose-dependent responses appropriate for phencyclidine; the levo isomer did not produce the responses appropriate for phencyclidine at any of the doses tested. In both species, the levo isomer was more potent than the dextro isomer in decreasing the rate of responding. Thus racemic N-allylnormetazocine is a mixture of compounds that produce different behavioral effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brady, K T -- Balster, R L -- May, E L -- DA-00490/DA/NIDA NIH HHS/ -- DA-01442/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 8;215(4529):178-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6274022" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*drug effects ; Male ; Naloxone/pharmacology ; Phenazocine/*analogs & derivatives/pharmacology ; Phencyclidine/pharmacology ; Rats ; Rats, Inbred Strains ; Receptors, Opioid/drug effects ; Saimiri ; Stereoisomerism ; Structure-Activity Relationship
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  • 31
    Publication Date: 1982-01-15
    Description: The electrophysiological effects of ethanol in low doses (5 to 20 millimoles per liter or 23 to 92 milligrams per 100 milliliters) were examined intracellularly in CA1 cells of rat hippocampus in vitro. Inhibitory and excitatory postsynaptic potentials were increased when ethanol was applied to the respective synaptic terminal regions. Postsynaptically, ethanol caused a moderate hyperpolarization with increased membrane conductance, even when synaptic transmission was blocked. Ethanol augmented the hyperpolarization that followed repetitive firing or that followed the eliciting of calcium spikes in the presence of tetrodotoxin, but not the rapid afterhyperpolarization in calcium-free medium. Ethanol appears to augment calcium-mediated mechanisms both pre- and postsynaptically.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carlen, P L -- Gurevich, N -- Durand, D -- R01 NS16660-01/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 15;215(4530):306-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7053581" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/physiology ; Electric Conductivity ; Ethanol/*pharmacology ; Hippocampus/*drug effects/physiology ; Male ; Membrane Potentials/drug effects ; Potassium/physiology ; Rats ; Rats, Inbred Strains ; Synaptic Membranes/drug effects ; Tetrodotoxin/pharmacology
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  • 32
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-10-01
    Description: Cultural phenomena may show considerable stability over time and space. Transmission mechanisms responsible for their maintenance are worthy of theoretical and empirical inquiry; they are complex and each possible pathway has different effects on evolutionary stability of traits, as can be shown theoretically. A survey designed to evaluate the importance of some components of cultural transmission on a variety of traits showed that religion and politics are mostly determined in the family, a mode of transmission which guarantees high evolutionary stability and maintenance of high variation between and within groups.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cavalli-Sforza, L L -- Feldman, M W -- Chen, K H -- Dornbusch, S M -- 10452/PHS HHS/ -- 20467/PHS HHS/ -- 20816/PHS HHS/ -- New York, N.Y. -- Science. 1982 Oct 1;218(4567):19-27.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123211" target="_blank"〉PubMed〈/a〉
    Keywords: Attitude ; Child ; Cultural Characteristics ; *Culture ; Family ; Female ; Humans ; *Interpersonal Relations ; Male ; Marriage ; Models, Psychological ; *Parent-Child Relations
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  • 33
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-12-17
    Description: Localization of the anatomic substrate for anticonvulsant activity mediated by gamma-aminobutyric acid (GABA) was examined using intracerebral injections of GABA agonists. Blockade of tonic hindlimb extension in the maximal electroshock test and blockade of tonic and clonic seizures produced by pentylenetetrazole and bicuculline were obtained by elevating GABA in the ventral midbrain tegmentum. Elevation of GABA in forebrain and hindbrain areas had no effect on convulsant activity. Blockade of tonic and clonic seizures was also obtained after microinjections of the direct GABA receptor agonist, muscimol, into the midbrain. The substantia nigra was identified as the critical midbrain site for GABA-mediated anticonvulsant activity. Local injection of GABA agonists into the midbrain provided seizure protection without a widespread augmentation of GABA-mediated activity throughout the brain and without impairing either alertness or motor function. Synapses in the substantia nigra appear to represent an important control mechanism for inhibiting the propagation of generalized convulsions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iadarola, M J -- Gale, K -- DA 02206/DA/NIDA NIH HHS/ -- MH32359/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1982 Dec 17;218(4578):1237-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7146907" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bicuculline/pharmacology ; Brain Mapping ; GABA Antagonists ; Male ; Muscimol/pharmacology ; Pentylenetetrazole/pharmacology ; Rats ; Seizures/*physiopathology ; Substantia Nigra/*physiology ; gamma-Aminobutyric Acid/*physiology
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  • 34
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-06-11
    Description: Local administration of human growth hormone in vivo to the cartilage growth plate of the proximal tibia of hypophysectomized rats resulted in accelerated longitudinal bone growth. This finding suggests that growth hormone directly stimulates the cells in the growth plate, and does not support the theory that the increase in the plasma concentration of somatomedin that follows growth hormone administration is the cause of this stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Isaksson, O G -- Jansson, J O -- Gause, I A -- New York, N.Y. -- Science. 1982 Jun 11;216(4551):1237-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7079756" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Development/*drug effects ; Bone and Bones/*drug effects ; Growth Hormone/*pharmacology ; Male ; Prolactin/pharmacology ; Rats ; Somatomedins/pharmacology ; Stimulation, Chemical
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-10-08
    Description: In an eight-arm radial maze, normal rats demonstrated good immediate retention for the order of first items (primacy component of serial position curve) and last items (recency component of serial position curve) of an eight-item (arm) list. In contrast, rats with dorsal hippocampal lesions displayed, on an immediate retention test, disruption of the primacy but not the recency component of the serial position curve. Furthermore, imposing a 10-minute delay before the retention test impaired all components of the serial position curve. These results support correspondence in mnemonic function of the hippocampus in animals and humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kesner, R P -- Novak, J M -- RR07092-12/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1982 Oct 8;218(4568):173-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123228" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Hippocampus/anatomy & histology/*physiology ; Male ; Memory/drug effects ; Rats ; *Serial Learning
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  • 36
    Publication Date: 1982-08-27
    Description: Neural activity of the red nucleus was studied in monkeys trained to operate devices requiring shoulder, elbow, wrist, hand, or finger movements. Single cell activity was more closely related to movements of the hand and fingers than to movements of the other joints. Discharge consistently preceded movements by a constant time interval; duration of discharge was highly correlated with the duration of movement; and discharge rate was highly correlated with movement velocity. These data suggest a role for the rubrospinal pathway in the initiation and control of hand movements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kohlerman, N J -- Gibson, A R -- Houk, J C -- 5-R01-NS14703/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 27;217(4562):857-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7100930" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Electromyography ; Hand/*physiology ; Macaca fascicularis ; Macaca mulatta ; Male ; Movement ; Neural Conduction ; Neurons/physiology ; Red Nucleus/*physiology
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  • 37
    Publication Date: 1982-10-01
    Description: Rats rotated to the left when 5'-N-ethylcarboxamide adenosine (NECA) was injected into the left caudate nucleus and apomorphine was administered subcutaneously. The combination of NECA and apomorphine was more potent than L-(phenylisopropyl)adenosine and apomorphine in eliciting rotation, suggesting the involvement of adenosine receptors of the Ra type. The response was reduced when 2',5'-dideoxyadenosine was injected along with NECA into the caudate nucleus or when theorphylline was given intraperitoneally. Higher doses of apomorphine elicited a self-mutilatory response after the injection of NECA into the caudate nucleus. These results suggest that adenosine may be involved in the modulation of dopaminergic function in the striatum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Green, R D -- Proudfit, H K -- Yeung, S M -- New York, N.Y. -- Science. 1982 Oct 1;218(4567):58-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123218" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/administration & dosage/*analogs & derivatives/pharmacology ; Adenosine-5'-(N-ethylcarboxamide) ; Animals ; Apomorphine/pharmacology ; Caudate Nucleus/*physiology ; Corpus Striatum/*physiology ; Dopamine/*physiology ; Injections ; Kinetics ; Male ; Motor Activity/drug effects ; Rats ; Rats, Inbred Strains ; Rotation ; Vasodilator Agents/*pharmacology
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  • 38
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-12-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1982 Dec 24;218(4579):1295-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6183747" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Anemia, Sickle Cell/therapy ; Azacitidine/therapeutic use ; Fetal Hemoglobin/biosynthesis/*genetics ; Hemoglobin, Sickle/biosynthesis ; Humans ; Male ; Thalassemia/therapy
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-07-02
    Description: Inosine peripherally administered to rats markedly suppressed spontaneous food intake and food intake induced by diazepam, muscimol, insulin, and food deprivation. The purines 2-deoxyguanosine and 2-deoxyinosine also suppressed food deprivation-induced feeding, whereas 7-methylinosine, which does not bind to the benzodiazepine binding site in vitro, had no effect on food intake when compared with controls. These results suggest that purines may represent endogenous substances that regulate food intake through interactions with the benzodiazepine receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, A S -- Morley, J E -- New York, N.Y. -- Science. 1982 Jul 2;217(4554):77-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7046046" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Appetite/*drug effects ; Deoxyguanosine/pharmacology ; Diazepam/pharmacology ; Eating/*drug effects ; Food Deprivation ; Inosine/analogs & derivatives/pharmacology ; Insulin/pharmacology ; Male ; Muscimol/pharmacology ; Purines/*pharmacology ; Rats ; Rats, Inbred Strains ; Structure-Activity Relationship
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  • 40
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-01-22
    Description: The larva of the blowfly Cochliomyia hominivorax, also known as the screwworm, eats the living flesh of cattle and sheep and other warm-blooded animals. A program to eradicate the screwworm in the United States was initiated in the 1950's. The program was very effective until 1968, but severe screwworm outbreaks occurred in 1972 to 1976 and in 1978. Although the program has again been effective since 1979, the possibility of outbreaks recurring in the future has highlighted the need for a broader understanding of the pest. Studies of screwworm populations in the United Stated and Mexico indicate that much of the genetic diversity of this insect is distributed among sympatric non-interbreeding populations. A new approach may be required to retain the effectiveness of the control program and to prevent a serious outbreak from threatening the economic viability of the U.S. livestock industry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Richardson, R H -- Ellison, J R -- Averhoff, W W -- New York, N.Y. -- Science. 1982 Jan 22;215(4531):361-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7199204" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cattle Diseases/*prevention & control ; Diptera/classification/*physiology ; Ecology ; Infertility, Male ; Insect Control/methods ; Karyotyping ; Male ; Myiasis/*prevention & control ; North America ; Pest Control, Biological/*methods ; Reproduction ; Screw Worm Infection/*prevention & control
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  • 41
    Publication Date: 1982-12-24
    Description: The ethyl ester of beta-carboline-3-carboxylic acid has a high affinity for benzodiazepine receptors in the brain. In the rhesus monkey this substance produces an acute behavioral syndrome characterized by dramatic elevations in heart rate, blood pressure, plasma cortisol, and catecholamines. The effects are blocked by benzodiazepines and the specific benzodiazepine receptor antagonist Ro 15-1788. The benzodiazepine receptor may consist of several subsites or functional domains that independently recognize agonist, antagonists, or "active" antagonists such as beta-carboline-3-carboxylic acid ethyl ester. These results suggest that the benzodiazepine receptor is involved in both the affective and physiological manifestations of anxiety, and that the administration of beta-carboxylic acid ethyl ester to monkeys may provide a reliable and reproducible animal model of human anxiety.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ninan, P T -- Insel, T M -- Cohen, R M -- Cook, J M -- Skolnick, P -- Paul, S M -- New York, N.Y. -- Science. 1982 Dec 24;218(4579):1332-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6293059" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anxiety/*etiology ; Benzodiazepinones ; Blood Pressure/drug effects ; Carbolines/pharmacology ; *Disease Models, Animal ; Epinephrine/pharmacology ; Flumazenil ; Heart Rate/*drug effects ; Humans ; Hydrocortisone/blood ; Macaca mulatta ; Male ; Norepinephrine/pharmacology ; Receptors, Drug/*physiology ; Receptors, GABA-A
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  • 42
    Publication Date: 1982-01-01
    Description: Administration of the hepatic carcinogen aflatoxin B1 to experimental animals results in covalent binding to liver mitochondrial DNA at concentrations three to four times higher than nuclear DNA. The concentration of carcinogen adducts in mitochondrial DNA remains unchanged even after 24 hours, possible because of lack of excision repair. Similarly, mitochondrial transcription and translation remain inhibited up to 24 hours suggesting long-term effects of aflatoxin B1 on the mitochondrial genetic system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Niranjan, B G -- Bhat, N K -- Avadhani, N G -- CA-22762/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 1;215(4528):73-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6797067" target="_blank"〉PubMed〈/a〉
    Keywords: Aflatoxin B1 ; Aflatoxins/*metabolism ; Animals ; DNA, Mitochondrial/*metabolism ; Kinetics ; Liver Neoplasms/*chemically induced/metabolism ; Male ; Mitochondria, Liver/*metabolism ; Neoplasms, Experimental/chemically induced ; Protein Biosynthesis/drug effects ; Rats ; Transcription, Genetic/drug effects
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  • 43
    Publication Date: 1982-10-22
    Description: Estrogen pellets were placed in either the right or left hypothalamus of newborn female rats so that only one side of this brain area was exposed to the postnatal masculinizing and defeminizing effects of the hormone. The effects of estrogen on gonadotropin secretion and reproductive behavior depended on both the region and the side of implantation. Exposure of the left hypothalamus to estrogen resulted in defeminized development. Exposure of the right hypothalamus to estrogen resulted in masculinized development. Thus the response of the developing hypothalamus to gonadal steroids may be asymmetric.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nordeen, E J -- Yahr, P -- New York, N.Y. -- Science. 1982 Oct 22;218(4570):391-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123240" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estradiol/*pharmacology ; Female ; *Functional Laterality ; Hypothalamus/*physiology ; Male ; Ovary/growth & development ; Rats ; *Sex Differentiation/drug effects ; Sexual Behavior, Animal/physiology
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  • 44
    Publication Date: 1982-07-16
    Description: The ability of antiserum against murine L1210 leukemia to remove residual leukemia cells from murine bone marrow was investigated. Leukemic marrow was treated in vitro with antiserum and complement and used to hematologically reconstitute mice that had been irradiated with doses lethal to bone marrow. Following infusion of treated leukemic marrow, normal marrow returned without evidence of leukemia. More than 90 percent of the animals have survived for 11 months without untoward effects, suggesting that the technique may be of use in the treatment of acute leukemia in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trigg, M E -- Poplack, D G -- New York, N.Y. -- Science. 1982 Jul 16;217(4556):259-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7046048" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; *Bone Marrow Transplantation ; Cell Survival ; *Complement System Proteins ; Cytotoxicity, Immunologic ; Female ; Leukemia L1210/*immunology/therapy ; Male ; Mice ; Mice, Inbred DBA
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  • 45
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-07-23
    Description: The sexual behavior of rhesus monkeys in 15 male-female pairings was observed in both a large and a small area during the follicular and luteal phases of the female's cycle. Males ejaculated in all tests at the follicular phase of the female's cycle and in 53 percent of tests at the luteal phase. However, a significant decline in ejaculation during tests at the luteal phase occurred in the large, but not in the small area. Thus the degree to which the pair's sexual behavior was influenced by the female's hormonal state depended on the spatial conditions of the test.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallen, K -- MH35835/MH/NIMH NIH HHS/ -- RR-00165/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1982 Jul 23;217(4557):375-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7201164" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Copulation ; Ejaculation ; *Estrus ; Female ; Macaca/*physiology ; Macaca mulatta/*physiology ; Male ; Pregnancy ; Proestrus ; Sexual Behavior, Animal/*physiology ; Social Behavior ; *Spatial Behavior
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  • 46
    Publication Date: 1982-07-09
    Description: Flehmen-like responses (urine tests) are one of the characteristic behavioral reactions of male Asian elephants (Elephants maximus) to cow elephants in estrus. Components of the urine of estrous cow elephants were extracted with organic solvents and partially purified by chromatography and shown to evoke Flehmen-like responses when they were presented to adult bulls.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rasmussen, L E -- Schmidt, M J -- Henneous, R -- Groves, D -- Daves, G D Jr -- New York, N.Y. -- Science. 1982 Jul 9;217(4555):159-62.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089549" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Elephants/anatomy & histology/*physiology ; Estrus Detection ; Female ; Male ; Pheromones/*urine ; Sex Attractants/isolation & purification/*urine ; *Sexual Behavior, Animal
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  • 47
    Publication Date: 1982-10-22
    Description: Intravenous administration of rabbit antiserum to ovine corticotropin-releasing factor (CRF) markedly reduced the CRF-induced rise of plasma adrenocorticotropic hormone (ACTH) in intact nonstressed adult male rats while blocking more than 75 percent of the ACTH release observed in rats exposed to ether stress. Furthermore, antiserum to CRF significantly lowered ACTH levels in adrenalectomized animals. These results suggest that endogenous CRF plays a physiological role in regulating ACTH secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rivier, C -- Rivier, J -- Vale, W -- AM18811/AM/NIADDK NIH HHS/ -- AM20917/AM/NIADDK NIH HHS/ -- AM26741/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1982 Oct 22;218(4570):377-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6289439" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenalectomy ; Adrenocorticotropic Hormone/blood/*secretion ; Animals ; Antibodies ; Antigen-Antibody Complex ; Corticotropin-Releasing Hormone/*immunology ; Male ; Rats ; Secretory Rate/drug effects
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  • 48
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-09-03
    Description: Increases with aging in subperiosteal dimensions and second moments of area (measures of bending and torsional rigidity) in femoral and tibial cross sections are documented in an archeological sample from the American Southwest. Significant differences between cross-sectional sites and between sexes in the pattern of cortical remodeling with age are also present. These differences appear to be related to variations in the stress or strain levels in different regions of the femur and tibia which result from in vivo mechanical loadings of the lower limb.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ruff, C B -- Hayes, W C -- AM00749/AM/NIADDK NIH HHS/ -- AM26740/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 3;217(4563):945-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7112107" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; *Aging ; Bone Development ; Female ; Femur/*physiology ; Fractures, Bone/etiology ; Growth ; Humans ; Male ; Middle Aged ; Periosteum/*physiology ; Physical Exertion ; Sex Characteristics ; Stress, Mechanical ; Tibia/*physiology
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  • 49
    Publication Date: 1982-10-22
    Description: Gonadotropic activation of the adult rat testis in vitro and in vivo is followed by down-regulation of luteinizing hormone receptors and decreased androgen responses to subsequent hormonal stimulation. In contrast, treatment of cultured fetal testes with gonadotropins and dibutyryl adenosine 3',5'-monophosphate enhanced steroidogenic responsiveness and did not cause the luteinizing hormone-receptor loss and desensitization that is characteristic of the adult gonad. The analysis of gonadotropin receptors and action in cultured fetal testis cells facilitates developmental studies of gonadal function, and has revealed significant differences in the responses of fetal and adult Leydig cells to gonadotropic regulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, D W -- Dufau, M L -- Catt, K J -- 1F33-HD06192/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1982 Oct 22;218(4570):375-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6289438" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bucladesine/pharmacology ; Cell Differentiation/drug effects ; Cells, Cultured ; Chorionic Gonadotropin/pharmacology ; Hydroxyprogesterones/biosynthesis ; Leydig Cells/*drug effects ; Luteinizing Hormone/pharmacology ; Male ; Progesterone/biosynthesis ; Rats ; Receptors, Cell Surface/*drug effects/metabolism ; Receptors, LH ; Testis/*embryology/metabolism ; Testosterone/biosynthesis
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  • 50
    Publication Date: 1982-07-30
    Description: Mice infected with Trypanosoma rhodesiense were treatment concurrently with cis-diamminedichloroplatinum (II) (DDP), disulfiram, and hydration. Most of the mice (92.5 percent) were cured; inoculation of blood or suspensions of brain or heart from these animals did not produce disease in recipient mice. The dose of DDP needed to eliminate the trypanosomes, 3 milligrams per kilogram of body weight per day for 7 days, was lethally toxic unless the animals received disulfiram orally and subcutaneous injections of physiologic saline, which reduced the acute renal necrosis caused by DDP alone. Some mild to moderate reversible renal damage was noted upon pathologic examination of the treated mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wysor, M S -- Zwelling, L A -- Sanders, J E -- Grenan, M M -- New York, N.Y. -- Science. 1982 Jul 30;217(4558):454-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7201165" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cisplatin/adverse effects ; Disulfiram/*administration & dosage ; Kidney/pathology ; Male ; Mice ; Mice, Inbred ICR ; Necrosis/chemically induced ; Rats ; Sodium Chloride/administration & dosage ; Trypanosoma/drug effects ; Trypanosomiasis, African/pathology/*therapy
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  • 51
    Publication Date: 1982-01-08
    Description: Prompt and long-term closure of full-thickness skin wounds is guinea pigs and humans is achieved by applying a bilayer polymeric membrane. The membrane comprises a top layer of a silicone elastomer and a bottom layer of a porous cross-linked network of collagen and glycosaminoglycan. The bottom layer can be seeded with a small number of autologous basal cells before grafting. No immunosuppression is used and infection, exudation, and rejection are absent. Host tissue utilizes the sterile membrane as a culture medium to synthesize neoepidermal and neodermal tissue. A functional extension of skin over the entire wound area is formed in about 4 weeks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yannas, I V -- Burke, J F -- Orgill, D P -- Skrabut, E M -- GM 21700/GM/NIGMS NIH HHS/ -- GM 23946/GM/NIGMS NIH HHS/ -- HL 14322/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 8;215(4529):174-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7031899" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Animals ; Burns/*therapy ; Cells, Cultured ; Child ; Child, Preschool ; Collagen/therapeutic use ; Female ; Glycosaminoglycans/therapeutic use ; Guinea Pigs ; Humans ; Male ; Middle Aged ; Silicone Elastomers/therapeutic use ; *Skin Transplantation ; *Wound Healing
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  • 52
    Publication Date: 1982-08-13
    Description: When A1 noradrenergic neurons in the caudal ventrolateral medulla of rabbits are destroyed electrolytically or by local injection of the neurotoxin kainic acid, the concentration of vasopressin in plasma increases, causing hypertension. The A1 neurons may tonically inhibit the activity of vasopressin-secreting neuroendocrine cells through a direct hypothalamic projection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blessing, W W -- Sved, A F -- Reis, D J -- HL 1894/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 13;217(4560):661-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6124043" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic Fibers/*physiology ; Animals ; Arginine Vasopressin/*blood ; Blood Pressure ; Brain Stem/*physiology ; Glutamates/pharmacology ; Glutamic Acid ; Hypertension/*etiology ; Hypothalamus/physiology ; Kainic Acid/pharmacology ; Male ; Neurosecretion ; Norepinephrine/physiology ; Rabbits
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  • 53
    Publication Date: 1982-01-22
    Description: Some progeny resulting from interbreeding of individuals heterozygous for a pericentric inversion of chromosome 1 in the chicken have the two complementary types of recombinant chromosomes arising from a single crossing-over within the inverted segment. These individuals are capable of reproduction. Their progeny can have one or the other of the two recombinant chromosomes or, if crossing-over occurs, either a normal or an inversion chromosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bitgood, J J -- Shoffner, R N -- Otis, J S -- Wang, N -- New York, N.Y. -- Science. 1982 Jan 22;215(4531):409-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058325" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chickens/*genetics ; *Chromosome Inversion ; Female ; Karyotyping ; Male ; Meiosis ; *Recombination, Genetic
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  • 54
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-05-14
    Description: Previous studies have indicated that there is a relation between testicular function and adequate concentrations of zinc in testicular cells, and that calcitonin alters cellular zinc transfer in the testis. The present studies provide autoradiographic evidence that calcitonin binds in vivo to the cell membrane of testicular Leydig cells. The data thus confirm the presence of the testicular cell membrane calcitonin receptors that were previously demonstrated indirectly by Scatchard analysis of data collected from binding studies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chausmer, A B -- Stevens, M D -- Severn, C -- New York, N.Y. -- Science. 1982 May 14;216(4547):735-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6281881" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Calcitonin/*metabolism ; Leydig Cells/*metabolism ; Male ; Rats ; Receptors, Calcitonin ; Receptors, Cell Surface/*metabolism
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  • 55
    Publication Date: 1982-05-28
    Description: The antifibrinolytic agent epsilon-aminocaproic acid given in the drinking water to Swiss ICR/Ha mice significantly counteracted the appearance of colorectal tumors induced by 21 weekly infections of 1,2-dimethylhydrazine. The drug affected both the number and the location of the tumors and, in some animals, altogether prevented their appearance. The low concentrations of epsilon-aminocaproic acid in the plasma of four control mice given the agent labeled with carbon-14 for 3 days suggest that the effect may depend not on inhibition of plasminogen activator activity, but on interference with the binding of some substance to the strong lysine binding site of plasminogen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corasanti, J G -- Hobika, G H -- Markus, G -- New York, N.Y. -- Science. 1982 May 28;216(4549):1020-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6805074" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/*chemically induced ; Aminocaproates/*pharmacology ; Animals ; Colonic Neoplasms/*chemically induced ; Dimethylhydrazines/*antagonists & inhibitors ; Female ; Male ; Methylhydrazines/*antagonists & inhibitors ; Mice ; Neoplasms, Experimental/chemically induced ; Plasminogen/metabolism ; Plasminogen Activators/antagonists & inhibitors ; Plasminogen Inactivators ; Protein Binding
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  • 56
    Publication Date: 1982-07-30
    Description: Workers on rotating shifts dislike those aspects of their work schedules that violate circadian sleep-wake cycle physiology. Work schedule satisfaction, subjective health estimates, personnel turnover, and worker productivity improve when schedules are introduced that are designed to incorporate circadian principles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Czeisler, C A -- Moore-Ede, M C -- Coleman, R H -- New York, N.Y. -- Science. 1982 Jul 30;217(4558):460-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089576" target="_blank"〉PubMed〈/a〉
    Keywords: *Activity Cycles ; Adult ; Aged ; *Circadian Rhythm ; Health ; Humans ; Job Satisfaction ; Male ; Middle Aged ; *Sleep ; *Work
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  • 57
    Publication Date: 1982-11-12
    Description: Repetitive elicitation of startle-like responses by electrical stimulation of the cochlear nucleus led to sensitization followed by habituation. In contrast, repetitive elicitation of startle-like responses by electrical stimulation of the reticular formation led only to sensitization. Since these different locations represent different points along the acoustic startle circuit, the data suggest that sensitization may be related to the motor side of reflex arcs, whereas habituation may be related to the sensory side.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, M -- Parisi, T -- Gendelman, D S -- Tischler, M -- Kehne, J H -- MH-00004/MH/NIMH NIH HHS/ -- MH-18949/MH/NIMH NIH HHS/ -- MH-25642/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1982 Nov 12;218(4573):688-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7134967" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Pathways/*physiology ; Brain Stem/*physiology ; Cochlear Nerve/physiology ; *Habituation, Psychophysiologic ; Male ; Rats ; Reflex ; Reflex, Startle/*physiology ; Sound
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  • 58
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-06-25
    Description: Preliminary observations suggest a sex difference in the shape and surface area of the human corpus callosum. The sexual dimorphism is striking in the splenium, the caudal or posterior portion of the corpus callosum. The female splenium is both more bulbous and larger than the male counterpart. Since peristriate, parietal, and superior temporal fibers course through the splenium, this finding could be related to possible gender differences in the degree of lateralization for visuospatial functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeLacoste-Utamsing, C -- Holloway, R L -- New York, N.Y. -- Science. 1982 Jun 25;216(4553):1431-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089533" target="_blank"〉PubMed〈/a〉
    Keywords: Corpus Callosum/*anatomy & histology ; Female ; Humans ; Male ; Organ Size ; *Sex Characteristics ; Visual Perception
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  • 59
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-04-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalterio, S -- Badr, F -- Bartke, A -- Mayfield, D -- DA 02342/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Apr 16;216(4543):315-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6801767" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cannabinoids/*pharmacology ; Chromosome Aberrations/*chemically induced ; Chromosome Disorders ; Follicle Stimulating Hormone/blood ; Infertility, Male/*chemically induced/genetics ; Luteinizing Hormone/blood ; Male ; Mice ; Spermatogenesis/*drug effects ; Testosterone/blood
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  • 60
    Publication Date: 1982-08-20
    Description: Progesterone 21-hydroxylase activity varies extensively among liver microsomes prepared from individual New Zealand White (NZW) rabbits. The 21-hydroxylase activities are distributed between two groupings that differ by more than tenfold in mean activity. Both male and female animals are represented in the two groupings. However, females exhibited the higher activity more frequently than males. The 21-hydroxylation of progesterone is catalyzed by one of the liver microsomal cytochrome P-450 isozymes, form 1, and these differences in activity are suggestive of differences in the occurrence of this isozyme among NZW rabbits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dieter, H H -- Muller-Eberhard, U -- Johnson, E F -- HD04445/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):741-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6808664" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytochrome P-450 Enzyme System/metabolism ; Desoxycorticosterone/metabolism ; Female ; Isoenzymes/metabolism ; Liver/*enzymology ; Male ; Microsomes, Liver/metabolism ; NADPH-Ferrihemoprotein Reductase/metabolism ; Progesterone/*metabolism ; Rabbits ; Sex Factors ; Steroid 21-Hydroxylase/*metabolism ; Steroid Hydroxylases/*metabolism
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  • 61
    Publication Date: 1982-01-15
    Description: Autoradiograms prepared from adult rat brains demonstrate that nerve cells and neuropil in different brain regions selectively concentrate and retain intravenously administered triiodothyronine, by mechanisms susceptible to saturation with excess triiodothyronine. A neuroregulatory role for thyroid hormones, strongly supported by the observations, may account for their marked effects on behavior and the activity of the autonomic nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dratman, M B -- Futaesaku, Y -- Crutchfield, F L -- Berman, N -- Payne, B -- Sar, M -- Stumpf, W E -- HD03110/HD/NICHD NIH HHS/ -- MH29549/MH/NIMH NIH HHS/ -- NS09914/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 15;215(4530):309-12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7053582" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Brain/cytology/*metabolism ; Brain Mapping ; Male ; Rats ; Rats, Inbred Strains ; Triiodothyronine/*metabolism
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  • 62
    Publication Date: 1982-08-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eicher, E M -- Washburn, L L -- Whitney, J B 3rd -- Morrow, K E -- AM 17947/AM/NIADDK NIH HHS/ -- GM 20919/GM/NIGMS NIH HHS/ -- RR 01183/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 6;217(4559):535-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089579" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Crosses, Genetic ; Disorders of Sex Development/genetics ; Female ; Fertility ; Gonadal Dysgenesis/genetics ; Male ; Mice ; Mice, Inbred C57BL/genetics ; Muridae/*genetics ; Ovary/embryology ; Phenotype ; *Sex Chromosomes ; *Sex Determination Analysis ; Testis/abnormalities/embryology ; *Y Chromosome
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  • 63
    Publication Date: 1982-08-20
    Description: Fasting lowers blood pressure to a greater extent in spontaneously hypertensive rats than in normotensive rats. While fasting reduced cardiac sympathetic activity to an equivalent extent in both groups of animals, only in the hypertensive rats did fasting elicit an opiate-mediated vasodepressor response that was independent of sympathetic withdrawal. Both sympathetic nervous system suppression and endogenous opiate activation, therefore, may contribute to the hypotensive effect of fasting in the spontaneously hypertensive rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Einhorn, D -- Young, J B -- Landberg, L -- AM 20378/AM/NIADDK NIH HHS/ -- HL 24084/HL/NHLBI NIH HHS/ -- RR 76/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):727-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7100917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Blood Pressure/drug effects ; Endorphins/*physiology ; *Fasting ; Hypertension/physiopathology ; Male ; Myocardium/metabolism ; Naltrexone/pharmacology ; Norepinephrine/metabolism ; Rats ; Rats, Inbred Strains ; Sympathetic Nervous System/*physiology
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  • 64
    Publication Date: 1982-07-09
    Description: Strain-specific unresponsiveness was induced in adult mice by immunizing them with donor blood treated with antiserum to Ia (I region-associated antigens) prior to the transplantation of islets of Langerhans. This regimen alone produced greater than 100-day survival of islet allografts transplanted across a major histocompatibility barrier.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Faustman, D -- Lacy, P -- Davie, J -- Hauptfeld, V -- AI-12734/AI/NIAID NIH HHS/ -- AM-01226/AM/NIADDK NIH HHS/ -- GM-07200/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1982 Jul 9;217(4555):157-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6806903" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Complement System Proteins ; Diabetes Mellitus, Experimental/immunology ; Erythrocytes/immunology ; Graft Survival ; Histocompatibility Antigens Class II/*immunology ; Immune Sera ; Immunization ; Immunosuppression ; *Islets of Langerhans Transplantation ; Lymphocytes/immunology ; Male ; Mice ; Mice, Inbred C57BL ; Transplantation, Homologous
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  • 65
    Publication Date: 1982-08-27
    Description: Rats subjected to unilateral ablation of the motor cortex and placed on a narrow beam displayed transient contralateral paresis. An immediate and enduring acceleration of recovery was produced by a single dose of d-amphetamine given 24 hours after injury. This effect was blocked by haloperidol or by restraining the animals for 8 hours beginning immediately after amphetamine administration. A single dose of haloperidol given 24 hours after injury markedly slowed recovery. This effect was also blocked by restraining the animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Feeney, D M -- Gonzalez, A -- Law, W A -- RR 08139-07/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 27;217(4562):855-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7100929" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Catecholamines/physiology ; Dextroamphetamine/*pharmacology/therapeutic use ; Drug Interactions ; Haloperidol/*pharmacology ; Male ; Motor Activity/drug effects ; Motor Cortex/*physiology ; Paralysis/etiology/therapy ; Practice (Psychology) ; Rats ; Restraint, Physical ; Wound Healing/drug effects
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  • 66
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-10-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, C H -- New York, N.Y. -- Science. 1982 Oct 8;218(4568):108.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123223" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Humans ; Male ; Neoplasms/epidemiology/*etiology ; Prostatic Neoplasms/etiology
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  • 67
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-08-20
    Description: This case study of the Critical Care Unit at Tianjin's First Central Hospital, its physician-director, and one of its patients provides a portrait of how the policy of the four modernizations is being applied to the field of medicine in the People's Republic of China. On this unit of an urban hospital the "fourth modernization," science and technology, is systematically brought to bear on the problems of critically ill patients. The Chinese dualities and dilemmas that this "scaling the heights" policy entails are continually played out on the Critical Care Unit. An intricate balancing is involved between modern Western and traditional Chinese medicine, and between rural public health programs and primary and tertiary care services, within a medical morality framework that combines present-day political ideology with age-old ethical precepts. At this juncture the overall balance seems to be moving in the direction of modern, city-based, curative medicine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, R C -- Swazey, J P -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):700-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7100911" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; China ; *Critical Care ; Health Priorities ; Humans ; Intensive Care Units/*organization & administration ; Male ; Medical Laboratory Science/trends
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  • 68
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-09-17
    Description: Male Thamnophis melanogaster court immediately when exposed to estrogen-treated, attractive females and continue courting for 6 to 8 days. Males exposed to estrogen-treated females will court both intact and ovariectomized females. These males undergo a period of testicular recrudescence, whereas males exposed only to ovariectomized females do no. Sexual attractivity can be induced in female T. melanogaster without estrogen treatment by heavy feeding, which results in significant increases in liver size and activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garstka, W R -- NICHHDHD 12709/HD/NICHD NIH HHS/ -- NIMH 1 KOZ MH 00135/MH/NIMH NIH HHS/ -- NINCDS 15305/DS/DS NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 17;217(4565):1159-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7202252" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Castration ; Estrogens/pharmacology ; Male ; Nutritional Physiological Phenomena ; Reproduction ; Snakes/*physiology ; Testis/physiology
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  • 69
    Publication Date: 1982-06-11
    Description: In paraplegics and quadriplegics a profound paralysis of skeletal muscles occurs below the level of the spinal lesion. Unexplained in this state is the development of an overactive external urethral sphincter, which interferes with emptying of the bladder and may lead to infection of the urinary tract. Studies of cats show that the discharge of motoneurons causing this contraction has all the characteristics of a flexor reflex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jolesz, F A -- Cheng-Tao, X -- Ruenzel, P W -- Henneman, E -- New York, N.Y. -- Science. 1982 Jun 11;216(4551):1243-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7200635" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Disease Models, Animal ; Male ; Motor Neurons/physiology ; Paraplegia/*physiopathology ; Reflex/physiology ; Urethra/*innervation/physiopathology
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  • 70
    Publication Date: 1982-07-23
    Description: BALB/c mice obtained commercially were found to differ significantly from the standard phenotype of BALB/c strain mice. Isoenzyme tests and H-2 haplotype analyses indicated that the majority of mice from two of the three sources tested appeared mixed, frequently heterozygous, and did not consistently express either the expected H-2 or glucose phosphate isomerase type.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kahan, B -- Auerbach, R -- Alter, B J -- Bach, F H -- New York, N.Y. -- Science. 1982 Jul 23;217(4557):379-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6953593" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytotoxicity Tests, Immunologic ; Female ; Flow Cytometry ; Genetic Markers ; Glucose-6-Phosphate Isomerase/genetics ; H-2 Antigens/genetics/immunology ; Inbreeding ; Lymphocytes/immunology ; Male ; Mice ; Mice, Inbred BALB C/*genetics ; Phenotype
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-05-28
    Description: A new human plasmacytoma cell line (Karpas 707) has been established from a myeloma patient. The cultured cells are negative for Epstein-Barr viral nuclear antigen and free of mycoplasma. They are similar to plasma cells and secrete only lambda light chains. The cells are hypodiploid and contain the Philadelphia chromosome and other abnormalities. This cell line may be suitable for the production of human monoclonal antibodies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karpas, A -- Fischer, P -- Swirsky, D -- New York, N.Y. -- Science. 1982 May 28;216(4549):997-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7079750" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal/*biosynthesis ; *Cell Line ; Chromosomes, Human, 21-22 and Y/ultrastructure ; Humans ; Hybridomas/immunology ; Male ; Middle Aged ; Plasmacytoma/*genetics/immunology/ultrastructure
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  • 72
    Publication Date: 1982-11-26
    Description: Intraperitoneal injections of antibodies to pancreatic glucagon at the onset of the first meal after 12 hours of food deprivation increased meal size 63 percent and meal duration 74 percent in rats. The antibodies also reduced the increase in hepatic vein blood glucose that occurred during meals in control rats, but did not affect the prandial increase in portal vein blood glucose. These results suggest that, under these conditions, pancreatic glucagon is necessary for the normal termination of meals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Langhans, W -- Zeiger, U -- Scharrer, E -- Geary, N -- New York, N.Y. -- Science. 1982 Nov 26;218(4575):894-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7134979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/metabolism ; Feeding Behavior/*physiology ; Glucagon/immunology/*physiology ; Liver/metabolism ; Male ; Rats ; Satiation/*physiology
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  • 73
    Publication Date: 1982-09-17
    Description: Baboons implanted with intragastric catheters were given diazepam (10 milligrams per kilogram of body weight) twice daily for 45 consecutive days. On days 7 and 35, they were given intramuscular injections of the benzodiazepine receptor antagonist Ro 15-1788. Mild and intermediate withdrawal signs, including retching and vomiting, were observed after 7 days of diazepam, and more frequent and intense withdrawal signs, including tremor and convulsion, occurred after 35 days of diazepam. With the termination of the diazepam injections after 45 days, a mild to intermediate withdrawal syndrome was observed over the next 15-day period.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lukas, S E -- Griffiths, R R -- DA-01147/DA/NIDA NIH HHS/ -- DA-05186/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 17;217(4565):1161-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6287579" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzodiazepinones/*pharmacology ; Diazepam/*pharmacology ; Flumazenil ; Humans ; Male ; Papio ; Receptors, Drug/*drug effects ; Receptors, GABA-A ; Receptors, Neurotransmitter/drug effects ; Substance Withdrawal Syndrome/*chemically induced ; Time Factors
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  • 74
    Publication Date: 1982-04-23
    Description: Administration of a potent gonadotropin-releasing hormone (GnRH) antagonist [Nac-L-Ala1,pCl-D-Phe2,D-Trp3,6]GnRH as a single subcutaneous injection to castrated adult male rats reduced, by more than 90 percent, both serum luteinizing hormone concentrations and specific pituitary GnRH receptor binding. This effect persisted for 24 hours. The dissociation rate of the antagonist from pituitary membrane homogenates was fourfold slower than the dissociation rate of a potent agonist. The prolonged in vivo inhibition of pituitary GnRH receptor binding and luteinizing hormone secretion by the GnRH antagonist may be mediated by the slower dissociation rate of the antagonist from its specific pituitary membrane receptor site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heber, D -- Dodson, R -- Swerdloff, R S -- Channabasavaiah, K -- Stewart, J M -- New York, N.Y. -- Science. 1982 Apr 23;216(4544):420-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6280278" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Castration ; Follicle Stimulating Hormone/secretion ; Gonadotropin-Releasing Hormone/*antagonists & inhibitors ; Kinetics ; Luteinizing Hormone/*secretion ; Male ; Pituitary Gland/*metabolism ; Rats ; Receptors, Cell Surface/*drug effects/metabolism ; Receptors, LHRH
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  • 75
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-07-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1982 Jul 23;217(4557):336-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089567" target="_blank"〉PubMed〈/a〉
    Keywords: Chemical Industry ; Chromosome Aberrations ; Disease Susceptibility ; Ethics ; Female ; Genetic Testing/*trends ; Humans ; Male ; Neoplasms/chemically induced ; Occupational Diseases/*prevention & control ; hearing that many corporations are considering genetic screening of employees. ; Biochemical genetic screening of "susceptible" workers is aimed at identifying ; individuals unsuitable for specific jobs, and cytogenic monitoring involves the ; testing of groups of workers for chromosome aberrations that might occur as a ; result of exposure to chemicals. The apparent surge of interest in such testing ; requires that several legal, ethical, and policy issues be addressed, including ; the potential for discrimination, the misuse of screening as an alternative to ; cleaning up the workplace, the predictive capability of the tests, and the ; necessity for the development of guidelines for screening programs.
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  • 76
    Publication Date: 1982-01-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hosobuchi, Y -- Baskin, D S -- Woo, S K -- New York, N.Y. -- Science. 1982 Jan 1;215(4528):69-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6274019" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Ischemia/*complications ; Cerebrovascular Disorders/chemically induced/*drug therapy ; Gerbillinae ; Hemiplegia/*drug therapy/etiology ; Levorphanol ; Male ; Morphine ; Naloxone/*therapeutic use ; Receptors, Opioid/metabolism
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  • 77
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-01-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1982 Jan 22;215(4531):379-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6460316" target="_blank"〉PubMed〈/a〉
    Keywords: Back Pain/drug therapy ; Ethchlorvynol/adverse effects ; *Ethics, Medical ; Famous Persons ; History of Medicine ; Humans ; Male ; Substance-Related Disorders/therapy
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  • 78
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-08-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1982 Aug 13;217(4560):618-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089584" target="_blank"〉PubMed〈/a〉
    Keywords: Haiti/ethnology ; Homosexuality ; Humans ; Immunologic Deficiency Syndromes/*epidemiology/etiology ; Male ; Sarcoma, Kaposi/complications ; Substance-Related Disorders ; United States
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  • 79
    Publication Date: 1982-07-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1982 Jul 9;217(4555):141-2,4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoimmune Diseases/*physiopathology ; Brain/embryology/pathology/*physiology ; Dyslexia/pathology ; Female ; *Functional Laterality ; Humans ; Learning Disorders/complications ; Major Histocompatibility Complex ; Male ; Rats ; Testosterone/pharmacology/physiology
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  • 80
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-09-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1982 Sep 17;217(4565):1125-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7112119" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/physiology ; Birds/*physiology ; Brain/*physiology ; Female ; Male ; Neuronal Plasticity ; Testosterone/physiology
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  • 81
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-02-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maugh, T H 2nd -- New York, N.Y. -- Science. 1982 Feb 5;215(4533):651.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058330" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/pathology ; Adult ; Diabetes Mellitus/*pathology ; Female ; Humans ; Male ; *Obesity ; Sex Factors
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-02-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maugh, T H 2nd -- New York, N.Y. -- Science. 1982 Feb 5;215(4533):643-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058329" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosomes/*drug effects ; Environmental Exposure ; Environmental Pollutants/*adverse effects ; Female ; Humans ; Male ; Reproduction/*drug effects
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  • 83
    Publication Date: 1982-08-06
    Description: The principles of the measurement in vivo of the oxidation-reduction state of intramitochrondrial pyridine nucleotides were used in establishing a multichannel fluorometer-reflectometer. This approach made possible the study of changes of mitochrondrial redox states in four different organs (brain, liver, kidney, and testis) of the same animal, as well as the monitoring of four different cortical areas of the same brain hemisphere. In the measurement of reduced nicotinamide adenine dinucleotide fluorescence, oximetric and movement artifacts are negligible, but blood volume changes and tissue absorption properties are a source of error. The corrected fluorescence is obtained by subtracting the reflectance from the fluorescence signed in 1:1 ratio., During graded hypoxia, the corrected fluorescence showed a gradual increase and was maximal during anoxia in all four organs tested.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mayevsky, A -- Chance, B -- NINDS 10939/DS/DS NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 6;217(4559):537-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7201167" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Fiber Optic Technology/*instrumentation ; Fluorometry/*instrumentation ; Gerbillinae ; Kidney/metabolism ; Male ; Mitochondria/*metabolism ; Mitochondria, Liver/metabolism ; NAD/metabolism ; Optical Fibers ; Oxidation-Reduction ; Oxygen Consumption ; Rats ; Testis/metabolism
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  • 84
    Publication Date: 1982-07-30
    Description: Cysteamine rapidly reduces the concentration of prolactin in pituitary tissue in vivo and in vitro. The effect is dose-dependent, reversible, and cannot be accounted for by prolactin release. Cysteamine does not appear to exert its effect through dopamine receptors and does not alter lactotrope morphology, as determined by electron microscopy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Millard, W J -- Sagar, S M -- Landis, D M -- Martin, J B -- AM 26252/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1982 Jul 30;217(4558):452-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089575" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cysteamine/*pharmacology ; Domperidone/pharmacology ; Dose-Response Relationship, Drug ; Kinetics ; Male ; Pituitary Gland, Anterior/*metabolism ; Prolactin/analysis/*metabolism/secretion ; Rats ; Receptors, Dopamine/physiology ; Spiperone/pharmacology
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  • 85
    Publication Date: 1982-08-27
    Description: Leukotriene D4 (2 c 10(-9) mole), injected into the left circumflex coronary artery of anesthetized sheep, produced profound coronary vasoconstriction and impaired regional ventricular wall motion. This cardiac effect was neither inhibited by prior treatment of the sheep with a cyclooxygenase inhibitor nor associated with thromboxane B2 release into the coronary sinus. Intravenous FPL 55712 completely abolished the coronary vasoconstriction of leukotriene D4, but a significant reduction of regional wall shortening persisted.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Michelassi, F -- Landa, L -- Hill, R D -- Lowenstein, E -- Watkins, W D -- Petkau, A J -- Zapol, W M -- HL23591/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 27;217(4562):841-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6808665" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Pressure/drug effects ; Chromones/pharmacology ; Coronary Circulation/drug effects ; Coronary Vessels/*drug effects ; Cyclooxygenase Inhibitors ; Female ; Heart Ventricles/drug effects ; Ibuprofen/pharmacology ; Male ; Myocardial Contraction/drug effects ; SRS-A/*pharmacology ; Sheep ; Thromboxane B2/metabolism ; Vasoconstriction/*drug effects
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  • 86
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-07-09
    Description: Prolactin administration reportedly increases blood pressure in rats and rabbits. To study the effects of prolactin deficiency on blood pressure, rats were given saline, normal rabbit serum, or rabbit antiserum to rat prolactin on postnatal days 2 to 5. Both males and females given antiserum had significantly lower blood pressure at 14 weeks than rats given saline or normal rabbit serum. Blood pressure differences between females given antiserum and females given saline disappeared during and following pregnancy. The antiserum also lowered the concentration of prolactin in plasma 49 percent in males and decreased the prolactin response to ether stress in both sexes. These results suggest that endogenous prolactin is involved in blood pressure regulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mills, D E -- Buckman, M T -- Peake, G T -- New York, N.Y. -- Science. 1982 Jul 9;217(4555):162-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089550" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; *Blood Pressure ; Female ; Immune Sera/pharmacology ; Male ; Pregnancy ; Pregnancy, Animal ; Prolactin/blood/immunology/*physiology ; Rabbits ; Rats ; Rats, Inbred Strains ; Sex Characteristics ; Sodium Chloride/pharmacology
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  • 87
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-04-23
    Description: Intracellular calcium increases significantly as human fibroblasts age in culture. The calcium increase occurs 5 to 6 weeks (passages) earlier and is significantly greater in fibroblasts from subjects with cystic fibrosis in comparison with cells from control subjects. Intracellular calcium, which is thought to be a pathogenetic factor in cystic fibrosis, may also be a meaningful marker in cell aging.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, B L -- Lam, L F -- AG-02114/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1982 Apr 23;216(4544):417-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7071590" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Calcium/*metabolism ; *Cell Survival ; Cells, Cultured ; Child ; Cystic Fibrosis/*metabolism/pathology ; Female ; Fibroblasts ; Humans ; Infant ; Male
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  • 88
    Publication Date: 1982-04-23
    Description: A model of "overdose" deaths among heroin addicts is proposed which emphasizes recent findings concerning the contribution of drug-associated environmental cues to drug tolerance. Results of animal experiments performed to evaluate this model suggest that conditioned drug-anticipatory responses, in addition to pharmacological factors, affect heroin-induced mortality.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Siegel, S -- Hinson, R E -- Krank, M D -- McCully, J -- New York, N.Y. -- Science. 1982 Apr 23;216(4544):436-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7200260" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Disease Models, Animal ; Dose-Response Relationship, Drug ; Drug Tolerance ; Environment ; Heroin/*pharmacology ; Humans ; Male ; Rats ; Substance-Related Disorders/*physiopathology
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-07-02
    Description: Nine expert drivers operated an instrumented vehicle in tests over a highway at night after being treated with diazepam (5 and 10 milligrams), a placebo, and nothing. They reacted to 10 milligrams of diazepam with increased lateral position variability. Potentially dangerous impairment was inferred from the reactions of some subjects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Hanlon, J F -- Haak, T W -- Blaauw, G J -- Riemersma, J B -- New York, N.Y. -- Science. 1982 Jul 2;217(4554):79-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089544" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; *Automobile Driving ; Diazepam/*pharmacology ; Dose-Response Relationship, Drug ; Double-Blind Method ; Functional Laterality ; Humans ; Male ; Motor Activity/*drug effects ; Placebos
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  • 90
    Publication Date: 1982-09-03
    Description: Cytogenic studies were performed on the direct chromosome preparations of the renal cell carcinoma cells and the cultured peripheral blood lymphocytes of a patient with familial renal cell carcinoma. The results revealed a specific, acquired translocations (3p;11p) present in the majority of metaphases of the tumor, indicating that the development of renal cell carcinoma is associated with a deletion in the proximal end of 3p. Renal cell carcinoma is thus the third example--the first two being retinoblastoma and Wilms' tumor--of a chromosomal deletion occurring germinally or somatically in association with a specific tumor. This finding adds further support to the existence of specific human cancer genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pathak, S -- Strong, L C -- Ferrell, R E -- Trindade, A -- CA 27925/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 3;217(4563):939-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7112106" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/*genetics ; Adult ; Chromosome Banding ; Chromosomes, Human, 1-3/*ultrastructure ; Chromosomes, Human, 6-12 and X/*ultrastructure ; Female ; Humans ; Karyotyping ; Kidney Neoplasms/*genetics ; Lymphocytes/ultrastructure ; Male ; Pedigree ; *Translocation, Genetic
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  • 91
    Publication Date: 1982-10-29
    Description: Saturable and stereospecific binding sites for (+)-[3H]amphetamine were demonstrated in membrane preparations from rat brain. The density of these binding sites varies among brain regions and is highest in the hypothalamus and brainstem. Specific (+)-[3H]amphetamine binding in hypothalamus is largely confined to synaptosomal membranes, rapidly reversible, and sensitive to both heat and proteolytic enzymes. Scatchard analysis of the equilibrium binding data revealed two distinct sites with apparent affinity constants of 93 and 300 nanomoles per liter, respectively. The effects of various psychotropic drugs as well as a number of putative neurotransmitters and related agonists and antagonists in displacing specific (+)-[3H]amphetamine binding demonstrate that these binding sites are not associated with any previously described neurotransmitter or drug receptors, but are specific for amphetamine and related phenylethylamine derivatives. Furthermore, the relative affinities of a series of phenylethylamine derivatives for (+)-[3H]amphetamine binding sites in hypothalamic membranes is highly correlated to their potencies as anorexic agents. These results suggest the presence of specific receptor sites in hypothalamus that mediate the anorexic activity of amphetamine and related drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, S M -- Hulihan-Giblin, B -- Skolnick, P -- New York, N.Y. -- Science. 1982 Oct 29;218(4571):487-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123250" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anorexia/physiopathology ; Appetite Depressants/*pharmacology ; Cell Membrane/metabolism ; Dextroamphetamine/*metabolism ; Hypothalamus/drug effects/*metabolism/physiology ; Male ; Phenethylamines/metabolism ; Rats ; Receptors, Drug/*metabolism ; Structure-Activity Relationship
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  • 92
    Publication Date: 1982-06-25
    Description: The concentrations of oxytocin, arginine vasopressin, and estrogen stimulated neurophysin in cerebrospinal fluid of monkeys showed a daily fluctuation with high concentrations occurring during the light period. The patterns of oxytocin and estrogen-stimulated neurophysin in the cerebrospinal fluid were not observed in the plasma nor were they altered after the administration of a dose of estradiol that increased concentrations of estrogen-stimulated neurophysin in plasma. The disassociation between these cerebrospinal fluid and plasma patterns and values suggests that the secretory activity of neurons that release estrogen-stimulated neurophysin and oxytocin into the cerebrospinal fluid is controlled by mechanisms different from those that control their release into the plasma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perlow, M J -- Reppert, S M -- Artman, H A -- Fisher, D A -- Self, S M -- Robinson, A G -- New York, N.Y. -- Science. 1982 Jun 25;216(4553):1416-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7201163" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine Vasopressin/blood/*cerebrospinal fluid ; Circadian Rhythm ; Estradiol/pharmacology ; Macaca mulatta ; Male ; Neurons, Efferent/secretion ; Neurophysins/*cerebrospinal fluid ; Oxytocin/blood/*cerebrospinal fluid
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  • 93
    Publication Date: 1982-11-26
    Description: The two sex determining sperm populations of the vole Microtus oregoni were separated according to DNA content by use of flow sorting instrumentation. Although the sperm were not viable, they should be useful for addressing the question of haploid expression of genes linked to sex chromosomes and for efficiently searching for biochemical markers that differentiate the two populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pinkel, D -- Gledhill, B L -- Lake, S -- Stephenson, D -- Van Dilla, M A -- New York, N.Y. -- Science. 1982 Nov 26;218(4575):904-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6753153" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arvicolinae/genetics ; DNA/analysis ; Flow Cytometry/methods ; Fluorescent Dyes ; Male ; Sex Chromosomes/ultrastructure ; *Sex Determination Analysis ; Spermatozoa/*physiology
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  • 94
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-12-10
    Description: Intracerebroventricular administration of dynorphin produced potent and long-lasting effects on motor function and the electroencephalogram in rats. In addition, local iontophoretic or pressure ejection of dynorphin consistently inhibited hippocampal unit activity. None of these effects were significantly affected by naloxone even at high doses. Moreover, a fragment of dynorphin that failed to displace any of a number of tritiated narcotics from rat brain homogenates produced similar effects on these physiological measures in vivo. On the basis of a variety of criteria for "opiate action," the results suggest that a second biologically active site within the dynorphin sequence is capable of quite potent but nonopiate effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walker, J M -- Moises, H C -- Coy, D H -- Baldrighi, G -- Akil, H -- 1F32DA04183/DA/NIDA NIH HHS/ -- DA02265/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Dec 10;218(4577):1136-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6128791" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Amino Acid Sequence ; Animals ; Dynorphins ; Endorphins/*physiology ; Hippocampus/*physiology ; Male ; Pain/*physiopathology ; Rats ; Structure-Activity Relationship
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  • 95
    Publication Date: 1982-08-27
    Description: A pituitary glycopeptide whose amino acid sequence was previously identified has now been recognized as the final portion of the precursor to arginine vasopressin and its associated neurophysin. Immunocytochemical techniques with antiserums against this 39 amino acid peptide and vasopressin were used to study their distribution in the rat central nervous system. The peptide is located in vasopressin-synthesizing cells in the neurosecretory magnocellular nuclei. Positively stained fibers project from the magnocellular nuclei through the median eminence to the posterior pituitary. Studies of the homozygous Brattleboro rat, which is known to be deficient in the production of vasopressin and its related neurophysin, also show the absence of immunoreactivity to this peptide. These immunocytochemical data strongly indicate that the peptide is synthesized with vasopressin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watson, S J -- Seidah, N G -- Chretien, M -- DA00154/DA/NIDA NIH HHS/ -- DA02265/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 27;217(4562):853-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6125034" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Arginine Vasopressin/*metabolism ; Brain/*metabolism ; Dynorphins ; Endorphins/metabolism ; Hypothalamus/metabolism ; Male ; Neurophysins/*metabolism ; Peptide Fragments ; Pituitary Gland, Posterior/metabolism ; Protein Precursors/analysis/*metabolism ; Rats ; Rats, Inbred Strains
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  • 96
    Publication Date: 1982-04-02
    Description: The opioid peptide dynorphin is widely distributed in neuronal tissue of rats. By immunocytochemical methods, it was shown previously that dynorphin-like immunoreactivity is present in the posterior pituitary and the cells of the hypothalamic neurosecretory magnocellular nuclei which also are responsible for the synthesis of oxytocin, vasopressin, and their neurophysins. By using an affinity-purified antiserum to the non-enkephalin part of the dynorphin molecule it has now been demonstrated that dynorphin and vasopressin occur in the same hypothalamic cells of rats, whereas dynorphin and oxytocin occur in separate cells. Homozygous Brattleboro rats (deficient in vasopressin) have magnocellular neurons that contain dynorphin separate from oxytocin. Thus dynorphin and vasopressin, although they occur in the same cells, appear to be under separate genetic control and presumably arise from different precursors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watson, S J -- Akil, H -- Fischli, W -- Goldstein, A -- Zimmerman, E -- Nilaver, G -- van wimersma Griedanus, T B -- DA 00254/DA/NIDA NIH HHS/ -- DA 02265/DA/NIDA NIH HHS/ -- DA1199/DA/NIDA NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1982 Apr 2;216(4541):85-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6121376" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine Vasopressin/*metabolism ; Dynorphins ; Endorphins/*metabolism ; Enkephalin, Leucine ; Enkephalins/metabolism ; Hypothalamus/cytology/*metabolism ; Immunologic Techniques ; Male ; Rats
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  • 97
    Publication Date: 1982-11-19
    Description: The effect of ethanol on hippocampal axonal sprouting was studied with a histochemical technique for identifying acetylcholinesterase. Unilateral lesion of the entorhinal cortex in adult rats produced an increase in the density of acetylcholinesterase staining in the outer molecular layer and a concomitant increase in the width of the pale-staining commissural-associational zone of the dentate gyrus. Other rats were given ethanol (11.3 +/- 0.45 grams per kilogram) for 2 weeks before and 9 days after receiving the lesion. Ethanol abolished the expansion of the commissural-associated zone. The effect of ethanol on sprouting axons suggests that it may inhibit recovery of function after brain injury.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉West, J R -- Lind, M D -- Demuth, R M -- Parker, E S -- Alkana, R L -- Cassell, M -- Black, A C Jr -- AA-03884/AA/NIAAA NIH HHS/ -- New York, N.Y. -- Science. 1982 Nov 19;218(4574):809-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7134977" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/drug effects/*physiology ; Ethanol/*pharmacology ; Female ; Hippocampus/drug effects/*physiology ; Male ; Rats ; Rats, Inbred Strains
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  • 98
    Publication Date: 1982-04-09
    Description: Maximum expiratory flow rate at 30 percent of vital capacity above residual volume served as an index of airway obstruction in comparing the effects of leukotriene C and histamine administered by aerosol to five normal persons. Leukotriene C was 600 to 9500 times more potent than histamine on a molar basis in producing an equivalent decrement in the residual volume. The leukotriene C response was slow in onset and prolonged, reminiscent of the effects of aerosol allergen challenge in asthmatic allergic subjects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, J W -- Drazen, J M -- Coles, N -- McFadden, E R Jr -- Weller, P F -- Corey, E J -- Lewis, R A -- Austen, K F -- AI-00399/AI/NIAID NIH HHS/ -- AI-07722/AI/NIAID NIH HHS/ -- AI-10356/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1982 Apr 9;216(4542):196-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7063880" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Airway Resistance/*drug effects ; Bronchi/*drug effects ; Dose-Response Relationship, Drug ; Female ; Histamine/pharmacology ; Humans ; Male ; Middle Aged ; Prostaglandins F/pharmacology ; SRS-A/*pharmacology ; Time Factors
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  • 99
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-02-26
    Description: The high-affinity binding sites for mianserin and imipramine appear to be locate in different neurons of rat brain. Studies in which lesions were produced with 5,7-dihydroxytryptamine and other studies in which the 5-hydroxytryptamine content was decreased with p-chlorophenylalanine indicate that some of the imipramine binding sites are on serotonin axon terminals and others are on nonserotonergic synapses. The sites that bind mianserin are on postsynaptic serotonin sites as well as on synapses of other neuronal systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brunello, N -- Chuang, D M -- Costa, E -- New York, N.Y. -- Science. 1982 Feb 26;215(4536):1112-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6278586" target="_blank"〉PubMed〈/a〉
    Keywords: 5,7-Dihydroxytryptamine/pharmacology ; Animals ; Brain/*metabolism ; Cerebral Cortex/metabolism ; Corpus Striatum/metabolism ; Dibenzazepines/*metabolism ; Hippocampus/metabolism ; Hypothalamus/metabolism ; Imipramine/*metabolism ; Male ; Mianserin/*metabolism ; Rats ; Receptors, Neurotransmitter/*metabolism
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  • 100
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1982-06-25
    Description: When injected continuously into the lateral ventricles of the rat, somatostatin increased the frequency of the migrating myoelectric complexes of the small intestine in a dose-related manner. A significant increase was obtained at a dose as low as 0.066 picomole per minute. In contrast, cholecystokinin octapeptide decreased the frequency of the migrating myoelectric complex of the small intestine or disrupted this pattern when injected into the lateral ventricle at rates of 0.073 to 0.23 picomole per minute. These findings support the hypothesis that somatostatin and cholecystokinin octapeptide act on central nervous system structures that are involved in the control of intestinal motility.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bueno, L -- Ferre, J P -- New York, N.Y. -- Science. 1982 Jun 25;216(4553):1427-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6124037" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cholecystokinin/administration & dosage/analogs & derivatives/*pharmacology ; Dose-Response Relationship, Drug ; *Gastrointestinal Motility ; Injections, Intraventricular ; Male ; Rats ; Rats, Inbred Strains ; Somatostatin/administration & dosage/*pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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