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  • 1990-1994
  • 1980-1984  (29)
  • 1920-1924
  • 1982  (29)
  • Immunohistochemistry
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 394 (1982), S. 221-233 
    ISSN: 1432-2307
    Schlagwort(e): Human pituitary adenoma ; Light and electron microscopy ; Immunohistochemistry ; Several adenohypophyseal cell types
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The combined use of several histological procedures (i.e. conventional light microscopy, immunohistochemistry and electron microscopy) among 45 unselected pituitary adenomas demonstrated the existence of 9 tumors (20%) containing several identifiable adenohypophy seal cell types. Thecellular associations were between 2 or 3 identifiable cell types. Mammosomatotrophic tumors were the most frequent but not the only mixed type (somatomammocorticotrophic, somatocorticotrophic tumors were also found). The cellular components varied in size but the cells appeared randomly distributed in the tumors. In all the adenomas there was an unidentified cell component (no reactivity with antisera used) varying from sparse to numerous elements. On adjacent sections the adenomatous cells reacted with a single specific antiserum, but in two cases the immunohistochemistry on contiguous paraffin embedded sections did not confirm this with certainty. These results confirm those of others and a new term is purposed to designate these tumors: heterogeneous pituitary adenomas. According to the nature and the proportions of the cell components the heterogeneous adenomas were subdivided into two groups: a group A which comprised adenomas formed by a major identifiable cellular type associated with one or two other less frequent cell types, and a group B formed by a predominant unidentifiable (no reactivity with immunochemical stainings) cell type associated with one or two other identified cell types. The present morphofunctional classifications of pituitary adenomas should be modified to include homogeneous adenomas with a single cell type and heterogeneous adenomas with several cell types.
    Materialart: Digitale Medien
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 395 (1982), S. 1-9 
    ISSN: 1432-2307
    Schlagwort(e): Malakoplakia ; Macrophages ; Alpha-1-antitrypsin ; Michaelis ; Gutmann bodies ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Macrophages in malakoplakia contain large amounts of immuno-reactive alpha-1-antitrypsin (AAT). The amount of AAT remains unchanged during the morphogenetic stages of the pathological process (early, granulomatous, fibrosing phases), and does not correlate with the number or the presence of Michaelis-Gutmann (M.G.) bodies. Macrophages from other pathological processes, closely resembling malakoplakia cells but without M.G. bodies, did not contain AAT, except for a few macrophages in tuberculosis and xanthogranulomatous pyelonephritis. Whatever the source and the pathogenic role of AAT in malakoplakia, its presence in all macrophages seems to be specific for this disease. Immuno-histochemical staining for AAT is therefore proposed as a useful test for an early and accurate differential diagnosis of malakoplakia.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 395 (1982), S. 87-98 
    ISSN: 1432-2307
    Schlagwort(e): Bronchial mucosa ; Cell suspension ; Lung carcinomas ; Keratin polypeptides ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The distribution of intracellular keratins was investigated in normal bronchial epithelium and in several morphologically distinct forms of respiratory tract carcinomas. This study was performed with two different experimentally produced antisera against normal human stratum corneum keratin and against keratin protein of MW 67000 dalton, using indirect immunofluorescence and immunoperoxidase methods on tissue sections and cell suspensions. In normal bronchial epithelium, the basal cells were strongly labelled by both antisera. The ciliated columnar cells appeared devoid of cytokeratins in tissue sections but were strongly labelled with both antisera in cell suspensions. The goblet cells remained negative in every case. In squamous metaplasia of the bronchus, all epithelial cells were unevenly stained with both antisera. Among tumours, only the squamous cell carcinomas were strongly labelled by both antisera. Primary lung adenocarcinoma appeared weakly positive, whereas metastatic lung carcinomas, undifferentiated lung carcinomas, oat cell tumours, carcinoid tumours were negative. The immunocytochemical determination of keratins appears to be of value in the study of normal and abnormal epithelial differentiation, in the diagnosis of poorly differentiated carcinomas and in their distinction from metastatic tumours of the lung.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 397 (1982), S. 1-6 
    ISSN: 1432-2307
    Schlagwort(e): Papillary syringadenoma ; Immunohistochemistry ; Immunoglobulins
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Twenty-one papillary syringadenomas were studied using immunohistochemical methods to characterise the immunoglobulin classes associated with the plasma cell infiltrates characteristically seen in these neoplasms. It was found that the majority of the plasma cells produce IgG (65.2%). Plasma cells associated with IgA and IgM production constituted 30.4% and 4.4% respectively of the enumerated cells. These findings confirm the long-presumed inflammatory nature of these infiltrates.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 397 (1982), S. 327-333 
    ISSN: 1432-2307
    Schlagwort(e): Immunohistochemistry ; Casein ; Epithelial membrane antigen
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Antisera raised against human milk fat globule membranes and against the casein fraction of human milk have been compared. Using an immunohistochemical stain of tissue sections it has been shown that many of the antigenic determinants detected by the different antisera are identical. A radioimmunoassay for epithelial membrane antigen (EMA) showed that casein preparations are associated with small quantities of EMA. Antisera to casein frequently contained appreciable concentrations of antibodies to EMA and this accounts for the immunohistochemical staining of non-mammary tissues.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1432-2307
    Schlagwort(e): Thyroid cancer ; Thyroglobulin ; Immunohistochemistry ; Morphometry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Twenty-four differentiated human thyroid carcinomas were investigated light microscopically and immunohistochemically by morphometric methods. The study revealed that thyroglobulin synthesis in follicular and papillary carcinomas is independent of tumor type and histostructural differentiation. The immunohistochemical results suggest that a defect in thyroglobulin synthesis and thyroglobulin secretion in addition to iodine accumulation and organification defects impairs the effectiveness of postoperative radioiodine treatment of differentiated thyroid carcinomas.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 398 (1982), S. 221-228 
    ISSN: 1432-2307
    Schlagwort(e): Thyroid tumour ; Immunohistochemistry ; Keratin ; Thyroglobulin ; Differential diagnosis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary 56 thyroid gland tumours and non neoplastic alterations were studied for keratin and thyroglobulin staining, using the indirect immunoperoxidase method on serial formalin fixed paraffin embedded sections. Papillary carcinomas showed a strong reaction with anti-keratin serum but a weak reaction with anti-thyroglobulin serum. Follicular adenomas and carcinomas showed virtually no reaction for keratin but a strong reaction for thyroglobulin. Undifferentiated and medullary carcinomas did not react with either antiserum, except for single cells in two undifferentiated carcinomas which reacted with anti-keratin serum. In nodular goiters, hyperplastic follicles showed little or no reaction with anti-keratin serum and strong reaction with anti-thyroglobulin serum. It is suggested that this virtually type-specific staining for keratin or thyroglobulin may be related to different degrees of cellular differentiation and organelle content in the tumour cells.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Anatomy and embryology 165 (1982), S. 51-61 
    ISSN: 1432-0568
    Schlagwort(e): Anterior pituitary cells ; Mitosis ; Rat ; Immunohistochemistry ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Mitotic rates of the six types of immunohistochemically identifiable adenohypophysial cells were histometrically calculated in colchicine-pretrated male rats 5, 17, 30 and 70 days old. Sections were stained with the antisera against rLH, rFSH, rTSH, oGH, rPRL and pACTH1–39. The mitotic growth rate of the anterior pituitary gland at 30 days of age was much higher than at other times. Mitotic growth rates of GH and PRL cells increased with advancing age, while those of ACTH-, TSH- and immunonegative cells decreased with advancing age. LH/FSH cells showed no variation in mitotic growth rate with age. Mitotic cells can be classified into six cell types based on their fine structural properties: (1) agranular cells associated with the folliculo-stellate cells; (2) ambiguous cells with scanty minute secretory granules (50–150 nm in diameter); (3) basophils with a number of small secretory granules (130–200 nm); (4) immature acidophils whose large secretory granules (130–300 nm) are sporadically scattered; (5) acidophils with numerous spherical larger secretory granules (200–300 nm); and (6) prolactin cells with large polymorphic granules. At day 5 there was a high mitotic rate of the agranular and ambiguous cells [types (1) and (2)]; at day 70 a high mitotic rate was found in immature and mature acidophils [types (4) and (5)]. The mitotic rate of basophils (type 3) was high only at day 17 and low at all other times. The mitotic rate of prolactin cells (type 6) showed a slight increment with advancing age. It is concluded that the mitotic rates of the six cell types are age-dependent.
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Anatomy and embryology 165 (1982), S. 151-167 
    ISSN: 1432-0568
    Schlagwort(e): Oxytocin neuron ; Vasopressin neuron ; Hypothalamus ; Immunohistochemistry ; Monkey
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The hypothalamic oxytocin and vasopressin neurons of the monkey, Macaca fuscata, were demonstrated in Golgi-like images by a modified immunoperoxidase method. The magnocellular oxytocin and vasopressin neurons were distributed mainly in the supraoptic and paraventricular nuclei. In addition to these main nucleic, both types of magnocellular neurons were found in the accessory supraoptic nucleus, the periventricular and perifornical areas, the nucleus of the stria terminalis, the lateral hypothalamic area, and the pars interna of the globus pallidus. Magnocellular oxytocin neurons were seen immediately ventral to the anterior commissure, and parvocellular vasopressin neurons were localized in the medial portion of the suprachiasmatic nucleus. The preferential distribution of the oxytocin and vasopressin neurons was recognized not only in the supraoptic and paraventricular nuclei, but also in other areas. In all areas observed, the cytological difference between the oxytocin and vasopressin neurons could be identified. The area, of the perikarya of the vasopressin neurons was determined to be larger than that of the oxytocin neurons. Most of the axons of the oxytocin neurons issued from the perikarya, while the axons of the vasopressin neurons originated in most cases from the thick proximal dendrites. These results show that the oxytocin and vasopressin neurons are distributed in areas much broader than has hitherto been assumed, and that these two peptidergic neurons can be definitely differentiated morphologically as well as functionally.
    Materialart: Digitale Medien
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  • 10
    ISSN: 1432-0568
    Schlagwort(e): CRF neurons ; Hypothalamus ; Immunohistochemistry ; PAP ; Mammals
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The presence of the CRF-containing neurons in the hypothalamus was investigated in four different species (cats, dogs, pigs, and monkeys) by the peroxidase-antiperoxidase technique using specific anti-serum to CRF. In all animals examined, CRF-containing perikarya were found mainly in the paraventricular and supraoptic nuclei, and a small number of the immunoreactive cells were observed in the accessory supraoptic nucleus and the lateral hypothalamic area. The size of the CRF-containing perikarya ranged from 20–35 μm in diameter. These findings suggest that the magnocellular paraventricular and supraoptic nuclei are the center not only of the classical neurosecretory system for the production of the posterior lobe hormones, but also that of the CRF neuronal system.
    Materialart: Digitale Medien
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  • 11
    Digitale Medien
    Digitale Medien
    Springer
    Anatomy and embryology 165 (1982), S. 63-70 
    ISSN: 1432-0568
    Schlagwort(e): Pancreatic islet ; Cytogenesis ; Immunohistochemistry ; Rat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Chronological development of immunoreactive, pancreatic endocrine cells was immunohistochemically studied in rats. The first immunoreaction occurs for glucagon on day 11.5 and for insulin on day 12.5 of gestation, respectively, in the cells located within the cap-like or tubular pancreatic primordium derived from the gut wall. Immunoreactive somatostatin cells appear first at the periphery of primitive islets on day 15.5. On day 18.5, the cells of the primitive islets obtain their definitive arrangement and the islets are now separated from the tissue of the exocrine pancreas. Decapitation or encephalectomy performed on day 16.5 embryos fails to influence the ensuing further development of endocrine pancreas. This suggests that the hypothalamus or pituitary does not play an essential role in the histogenesis of the pancreatic islets.
    Materialart: Digitale Medien
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  • 12
    ISSN: 1432-0533
    Schlagwort(e): Endothelial cell ; Factor VIII/von Willebrand factor ; Glial fibrillary acidic protein ; Hemangioblastoma ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The histogenesis of hemangioblastoma stromal cells is unresolved. Ultrastructural observations suggest that the stromal cells, endothelial cells, and pericytes that compose this neoplasm are all derived from angiogenic mesenchyme. The expression of factor VIII/von Willebrand factor (FVIII/vWF), a specific marker for endothelial cells, and of glial fibrillary acidic protein (GFAP), a specific marker for glial cells, was examined in 16 hemangioblastomas using the peroxidase-antiperoxidase immunohistochemical method. Endothelial cell staining for FVIII/vWF was intense in 14 tumors, weak in one, and absent in another. There was no stromal cell staining in any of the neoplasms. Process-bearing, GFAP-positive cells were observed near the tumor margin in 13 cases, and deeper in the neoplasm in 8. In two of these tumors there were also occasional GFAP-positive cells that lacked processes and had a vacuolated cytoplasm. Virtually all of the GFAP-positive cells were interpreted as trapped astrocytes rather than stromal cells. The lack of expression of FVIII/vWF by the stromal cells indicates that they are antigenically distinct from endothelial cells. Several alternatives for stromal cell histogenesis remain open. The stromal cells may be derived from endothelial cells that have undergone antigenic loss, or from angiogenic mesenchymal cells that do not express FVIII/vWF. Alternatively, the stromal cells may originate from nonangiogenic mesenchymal cells derived from the mesoderm or neuroectoderm.
    Materialart: Digitale Medien
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  • 13
    ISSN: 1432-0584
    Schlagwort(e): Monoclonal antibodies ; T-cell antigens ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Fifteen monoclonal antibodies against different T-cell antigens were studied by immunohistochemistry in thymus, fetal thymus, fetal liver, palatine tonsils, and a few T-cell lymphomas. OKT 9 was identified as reacting with hemopoietic stem or precursor cells in fetal liver as well as with early B-determined lymphocytes in tonsillar germinal centres. OKT 10 labelled lymphocytes in thymus and surprisingly also the cytoplasm of some tonsillar cells with plasma-cell like appearance. OKT 6 and MAS 036 b reacted only with thymic cells. OKT 4, OKT 5, OKT 8, 8–11, labelled thymic cells- and portions of interfollicular cells in tonsils. OKT 3, NEI 016, NEI 015, and T 28 stained a majority of thymic cells and of tonsillar interfollicular lymphocytes. IFH-M 203, NEI 012 and 4–11 were positive with the majority of T-lymphocytes in tonsils but labelled only a few thymic cells.
    Materialart: Digitale Medien
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  • 14
    Digitale Medien
    Digitale Medien
    Springer
    Journal of cancer research and clinical oncology 103 (1982), S. 187-202 
    ISSN: 1432-1335
    Schlagwort(e): Gastric endocrine cells ; Endocrine cell carcinoma ; Early gastric cancer ; Scirrhous carcinoma ; Immunohistochemistry ; Schlüsselwörter ; Gastrische Endokrinzellen ; Endokrine Carcinome ; Frühcarcinom des Magens ; Scirrhöses Carcinom ; Immunhistochemie
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung 18 Argyrophilzellencarcinome aus insgesamt 101 Frühcarcinomen des Magens wurden lichtmikroskopisch, elektronenmikroskopisch sowie immunhistochemisch mit Antiseren gegen Polypeptide, CEA, Lysozyme und hCG untersucht. 7 dieser Tumoren enthielten Gastrin und 2 unter ihnen außerdem Somatostatin. In allen 18 Tumoren wurde CEA nachgewiesen, 7 von diesen 18 Tumoren zeigten Lysozyme, darunter 5 auch noch Gastrin. In 4 Tumoren wurde hCG beobachtet, und in 2 aus dieser Reihe von 4 fand sich gleichzeitig Gastrin, CEA, Mucin sowie Lysozyme. Argentaffine Zellen wurden in 7 von 18 Tumoren beobachtet. Drei von 7 Gastrin enthaltende Tumoren hatten mehr oder weniger argentaffine Zellen. Elektronmikroskopisch wurden unterschiedliche Sekretgranula beobachtet und 9 von 18 Tumoren waren D1 oder P Zellen ähnlich. Makroskopisch entsprach die Mehrzahl der Tumoren dem IIc oder IIc+III Typ. Histologisch waren von diesen 18 Tumoren 6 gut differenzierte und 12 wenig differenzierte Adenocarcinome, einschließlich Siegelring-zellencarcinomen. Sie waren öfters im Fundusbereich jüngerer Frauen lokalisiert. Unter Heranziehung unserer schon publizierten Untersuchungsbefunde wird vermutet, daß IIc-Typ Argyrophilzellencarcinome mit dem histologischen Bild des wenig differenzierten Adenocarcinoms dem scirrhösen Carcinom zugeordnet werden kann.
    Notizen: Summary Eighteen argyrophil cell carcinomas in 101 early gastric carcinomas were examined histologically, ultrastructurally, and immunohistochemically for polypeptides, carcinoembryonic antigen (CEA), lysozyme, and human chorionic gonadotrophin (hCG). Seven of these 18 tumors had gastrin, and two of seven tumors also contained somatostatin. In all of these 18 tumors CEA were demonstrated. Seven had lysozyme and five of seven tumors also contained gastrin; hCG were present in four of 18 tumors and two of four tumors had gastrin, CEA, mucin, and lysozyme simultaneously. Argentaffin cells were found in seven of 18 tumors. Of the above seven tumors containing gastrin, three had argentaffin cells. Ultrastructurally, several types of secretory granules were noted and tumor cells resembling D1-or P cells were present in nine of the 18 tumors. Macroscopically, many of the tumors showed IIc or IIc+III type. Histologically, the 18 tumors consisted of six well differentiated adenocarcinomas and 12 poorly differentiated adenocarcinomas including signet-ring cell carcinoma. These 12 tumors frequently developed in the stomach of young females. In view of our previous investigations, it was suggested that the IIc-type argyrophil cell carcinoma histologically showing poorly differentiated adenocarcinoma may be related to scirrhous carcinoma of the stomach.
    Materialart: Digitale Medien
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  • 15
    Digitale Medien
    Digitale Medien
    Springer
    European archives of oto-rhino-laryngology and head & neck 237 (1982), S. 1-5 
    ISSN: 1434-4726
    Schlagwort(e): Lysozyme ; Nasal mucosa ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary By use of the indirect immunoperoxidase method, lysozyme was localized in the serous glands and serous parts of mixed mucous-serous glands of the nasal respiratory area. Histochemically, lysozyme was absent from acini containing acid mucosubstances. These findings are in agreement with localizations of lysozyme in glands at other sites.
    Materialart: Digitale Medien
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  • 16
    ISSN: 1432-1106
    Schlagwort(e): GnRH ; Serotonin ; Dopamine-β-hydroxylase ; Immunohistochemistry ; Rat brain
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Immunahistochemical double staining for gonadotropin releasing hormone (GnRH) and serotonin or dopamine-β-hydroxylase reveals close appositions of fibers which contain serotonin or norepinephrine to GnRH producing neurons in the septo-preoptic region. In the organum vasculosum of the lamina terminalis and in the median eminence extensive anatomical overlap exists in the distribution of GnRH and serotoninergic fibers but little of GnRH and noradrenalinergic fibers. It is proposed that serotonin plays a major role in the regulation of GnRH secretion via contacts in all of the regions studied and that the influence of norepinephrine on GnRH-secretion in the median eminence is exerted mainly via involvement of dopaminergic tuberoinfundibular neurons.
    Materialart: Digitale Medien
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  • 17
    ISSN: 1432-0878
    Schlagwort(e): Vesicle recycling ; Immunohistochemistry ; Glycosaminoglycan ; Electrical stimulation ; Torpedo marmorata
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Semiquantitative immunohistochemical methods were used to demonstrate that at least some of the glycosaminoglycan contained within cholinergic synaptic vesicles is recycled during successive electrical stimulations of the electric organ of Torpedo marmorata.
    Materialart: Digitale Medien
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  • 18
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 226 (1982), S. 477-491 
    ISSN: 1432-0878
    Schlagwort(e): Serotonin fibers ; Spinal cord ; Immunohistochemistry ; Dog
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Distribution of serotonin fibers in the spinal cord of the dog was investigated by means of a modified PAP method; a rabbit anti-serotonin serum prepared in the laboratory of the authors was used in this study. Serotonin fibers were revealed as PAP-positive dark-brown elements displaying dot-like varicosities (0.5–2.0 μm in diameter). In the spinal cord of the dog, the distribution of serotonin fibers is extensive. These fibers occur more densely in more caudal segments and are most prominent at the sacrococcygeal level. From the level of the cervical spinal cord to the upper lumbar region, the descending serotonin fibers are located immediately under the pia mater in the ventrolateral portion of the lateral funiculus. In more caudal segments, serotonin fibers are dispersed throughout the ventral and lateral funiculi. These longitudinal en passage-fibers send numerous transverse collaterals to the gray matter. Serotonin fibers are distributed abundantly in the laminae I and III of the posterior column, while only a few fibers are found in the lamina II (substantia gelatinosa). In the intermediate zone, two descending serotonin pathways, i.e., lateral and medial longitudinal bundles, are observed to coincide topographically with the nucleus intermediolateralis at C8(T1)-L3(L4) and the nucleus intermediomedialis at C1-Co respectively. The former is particularly prominent and communicates with the contralateral bundle via commissural bundles at intervals of 300–500 μm. The large motoneurons in the anterior column, especially those in the nucleus myorabdoticus lateralis within the cervical and lumbar enlargements, are closely surrounded by fine networks of serotonin fibers and terminals.
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  • 19
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 221 (1982), S. 483-491 
    ISSN: 1432-0878
    Schlagwort(e): Glucagon ; Glicentin ; Human ; Colon ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary An immunohistochemical study of glucagon and glicentin immunoreactive endocrine cells in the human colon epithelium was performed. Serial sections and qualitative analysis show a cell population containing both immunoreactivities. However, there is another cell population exhibiting only an immunoreactivity with glicentin. The exact distribution of these immunoreactive endocrine cells within the colon crypt segments is also analysed. The significance of these findings concerning the synthesis of glucagon and glicentin and their function is discussed.
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  • 20
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 222 (1982), S. 283-298 
    ISSN: 1432-0878
    Schlagwort(e): LH-RH-neurones ; Diencephalon ; Immunohistochemistry ; Chicken
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Nerve fibres and perikarya containing LH-RH-like material were identified immunohistochemically in the diencephalon of the domestic hen using the peroxidase-anti-peroxidase technique. Perikarya were thinly scattered in bilateral bands close to the third ventricle extending from the nucleus praeopticus paraventricularis magnocellularis, passing in front of the anterior commissure into the septal area. In this latter area, the perikarya tended to spread out laterally. A few perikarya were seen in the anterior portion of the nucleus paraventricularis magnocellularis but were not found in the infundibular nuclear complex. Fibre tracts were seen running dorso-ventrally in the preoptic area apparently associated with the lamina terminalis. Fibres, possibly nerve terminals, were found in the lamina terminalis and in the external layers of the anterior and posterior divisions of the median eminence. A large number of fibres was seen distributed throughout the infundibular nuclear complex; scattered fibres were found close to the third ventricle in the anterior hypothalamus. Extrahypothalamic fibres were also observed to project from the septal area into other parts of the telencephalon.
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  • 21
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 224 (1982), S. 247-267 
    ISSN: 1432-0878
    Schlagwort(e): Serotonin ; Brainstem ; Immunohistochemistry ; Rat ; Cat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: 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.
    Materialart: Digitale Medien
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  • 22
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 224 (1982), S. 303-314 
    ISSN: 1432-0878
    Schlagwort(e): ACTH/β-endorphin neurons ; Synapse ; Hypothalamus ; Immunohistochemistry ; Rat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: 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.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 23
    ISSN: 1432-0878
    Schlagwort(e): Hypothalamus ; Vasoactive intestinal polypeptide (VIP) ; Immunohistochemistry ; Japanese quail ; Tuberohypophysial system
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The localization of vasoactive intestinal polypeptide (VIP) in the hypothalamus of the quail has been studied by means of light- and electron-microscopic immunohistochemistry. Numerous VIP-immunoreactive perikarya are distributed in the caudal portion of the nucleus infundibularis (n. tuberis) and nucleus mamillaris lateralis, and sparse in the preoptic area, nucleus supraopticus and nucleus paraventricularis. Dense localization of immunoreactive-VIP fibers is observed in the external layer of the median eminence, in close contact with the primary portal capillaries. The main origins of these fiber terminals are VIP-immunoreactive perikarya of the nucleus infundibularis. These neurons are spindle or bipolar and extend one process to the ventricular surface and another to the external layer of median eminence. They are CSF-contacting neurons and apparently constitute the tubero-hypophysial tract that links the third ventricle and the hypophysial portal circulation. VIP-reactive neurons in the nucleus mamillaris lateralis also project axons to the external layer of the median eminence, constituting the posterior bundle of the tuberohypophysial tract. Numerous VIP-immunoreactive perikarya occur also in the nucleus accumbens/pars posterior close to the lateral ventricle. They are also CSF-contacting neurons extending a process to the lateral ventricle. There are moderate distributions of VIP-reactive fibers in the area ventralis and in the area septalis. Ultrastructurally, the immunoreactive products against VIP are found in the elementary granules, 75–115 nm in diameter, within the nerve fibers in the median eminence.
    Materialart: Digitale Medien
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  • 24
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 227 (1982), S. 267-275 
    ISSN: 1432-0878
    Schlagwort(e): Cell determination ; ACTH cells ; LH cells ; Organ culture ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary In fetal rats, immunoreactive ACTH and LH cells are known to appear first near the ventral periphery of the pars distalis. The objective of this study was to test whether the developmental fate of these types of cells is actually determined in the ventral region of the developing adenohypophysis. Before the appearance of any immunoreactive cells (days 12.5–13.5), the adenohypophysial primordia of fetal rats were cut at different levels into dorsal and ventral parts and were then cultivated with surrounding tissues. When separated on day 12.5, ACTH and LH cells were immunohistochemically demonstrated almost exclusively in expiants of the dorsal half. Furthermore, a considerable number of ACTH and LH cells were found even in cultures of the most dorsal small region, i.e., the primordial roof accompanied by the brain. Cultivation of “roofless” primordia on the other hand, resulted in a marked decrease in the number of both types of cells. When adenohypophysial primordia were isolated and cut on day 13.5, a number of ACTH cells were observed alike in expiants of both the dorsal and ventral halves. On the other hand, LH cells were found almost exclusively in those expiants derived from the ventral half. The fact that the majority of future LH cells were included within the ventral bulgings called the lateral lobes was also shown either by their cultivation or removal. These results suggest that the developmental fate of ACTH and LH cells is determined in the dorsal region. A possible change in the localization of such determined cells from the dorsal to ventral portion of the pars distalis is discussed in relation to adenohypophysial growth during development.
    Materialart: Digitale Medien
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  • 25
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 227 (1982), S. 257-266 
    ISSN: 1432-0878
    Schlagwort(e): Differentiation of ACTH cell ; Organ culture ; Adenohypophysial primordium ; Immunohistochemistry ; Fetal rats
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary This study investigates the role of the developing diencephalic floor or mesenchymal tissue in the differentiation of ACTH-producing cells. The adenohypophysial primordia of fetal rats on days 12.5 and 13.5 of gestation were treated with collagenase; some primordia were allowed to retain an association with the brain and mesenchyme, but in others the brain and/or mesenchyme were removed. These different combinations of tissues were cultured and examined by immunohistochemical techniques using antisera against pACTH and synthetic α-MSH. Removal of mesenchyme alone had little effect on the development of ACTH cells as compared to primordia maintained with brain and mesenchyme. In contrast, removal of the brain with or without mesenchyme on day 12.5 resulted in a marked decrease of ACTH cells accompanied by a mal-growth of adenohypophysial tissue. Such changes were slight when the brain was separated from day 13.5 primordia. Immunoreactive α-MSH cells were sparse or absent in all cases. These results suggest that in fetal rats the developing diencephalic floor is essential for differentiation of ACTH cells before day 13.5 of gestation whereas mesenchyme has no apparent effect.
    Materialart: Digitale Medien
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  • 26
    ISSN: 1432-0878
    Schlagwort(e): Immunohistochemistry ; Gastrin/CCK/caerulein ; Peptidergic neurons ; Neurotransmitter ; Annelids
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Perikarya and nerve fibers containing a substance immunologically related to CCK-8 were detected in the nervous system of Nereis, a marine annelid worm. The most noteworthy immunostaining was seen in cell bodies, localized at the periphery of the brain, within nuclei 5, 6, 7, 9, 10, 13, 14, 15, 17, 20, 23–24. Immunoreactive fibers were also found in the neuropile without any particular grouping. Numerous other “positive” perikarya occur in the medio-ventral portion of the ventral nerve cord, and in the ventral and dorsal parts of the suboesophageal ganglion. In addition to the cell bodies in the cerebral external layer, immunoreactive axons were abundantly observed in the connectives between the ganglia. Moreover, our results demonstrate CCK-like staining in neurons showing variations in size and shape, and in affinity for paraldehyde fuchsin. The present results support the hypothesis that this peptide may exert a role as neurotransmitter or neuromodulator in annelids.
    Materialart: Digitale Medien
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  • 27
    ISSN: 1432-0878
    Schlagwort(e): Neuropeptides ; Gut hormones ; Immunohistochemistry ; Radioimmunoassay ; Teleosts
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The presence of peptides in the gastrointestinal tract of the rainbow trout, Salmo gairdneri, was investigated immunocytochemically. VIP-like immunoreactivity was demonstrated in nerves in all layers of the stomach and the intestine, whereas substance P-like immunoreactivity was localized to endocrine cells, predominantly in the mucosa of the stomach, and to nerves mainly concentrated in the myenteric plexus throughout the gut. Endocrine cells reactive to gastrin/CCK antiserum were demonstrated in the intestinal mucosa, while no immunoreactivity was found in the stomach. Bombesin-immunoreactive and somatostatin-immunoreactive cells were localized in the stomach mucosa, and cells reactive to glucagon antiserum in the intestinal mucosa. Radioimmunoassay of stomach mucosa and muscle confirmed the presence of VIP-like and substance P-like immunoreactivity in these tissues, while gastrin/CCK-like immunoreactivity was low and bombesin-like immuno-reactivity was insignificant. In conclusion, molecules resembling the mammalian brain-gut peptides may be involved in the neuronal and hormonal control of gut function in fish.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 28
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 226 (1982), S. 1-12 
    ISSN: 1432-0878
    Schlagwort(e): Serotonin-immunoreactive nerve fibers ; Cerebellum ; Cat ; Rat ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: 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.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 29
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 226 (1982), S. 215-223 
    ISSN: 1432-0878
    Schlagwort(e): Lung (mammals) ; Neuro-epithelial bodies ; Respiratory mucosa ; Serotonin ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary A recently developed immunohistochemical technique for serotonin (Steinbusch et al. 1978) was used in the present investigation to study the occurrence of this indoleamine in the granulated epithelial cells of neuroepithelial bodies (NEB). Lungs from neonatal rabbits and pigs exhibit immunoreactive cell groups identical in morphology and their preferential location (i.e., at bronchiolar bifurcations) to the recently described intrapulmonary NEB. Moreover, in the trachea and lung of rabbits isolated immunoreactive cells, presumably of Kultschitsky type, were found in the lining respiratory mucosa. Such single cells were also frequently observed in the bronchial epithelium of pig lungs. It is concluded that the corpuscular cells, being modulated by the central nervous system, probably represent intrapulmonary neuro(chemo-)receptors with local secretory activities, one of the substances released being serotonin and reacting to the oxygen composition of the inhaled air. It is proposed that the cells of Kultschitsky type exert a more local effect upon the airways.
    Materialart: Digitale Medien
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