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  • 1990-1994  (1)
  • 1965-1969  (1)
  • Affective disease  (1)
  • Antikörper  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 243 (1994), S. 235-239 
    ISSN: 1433-8491
    Keywords: Intracellular calcium ; Affective disease ; Platelets ; Lymphocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Many studies have demonstrated pharmacologic similarities between platelet and brain 5-HT2 binding sites. Therefore it may be possible to use platelets as a model for the central serotonergic neuron. Accordingly, a previcus report (Kusumi et al. 1991b) about elevated [Ca2+]i after serotonin stimulation in platelets of depressed patients was interpreted as further evidence for enhanced serotonergic sensitivity in depression. However, a very recent study showed an enhanced thrombin-induced platelet Ca2+ response, rather suggesting abnormalities of intracellular Ca2+ regulation in affective disorders. In the present study we have determined 5-HT2-and thrombin-induced Ca2+ responses in platelets and additionally phytohemagglutin (PHA)-induced Ca2+ increase in lymphocytes of medicated depressed patients (8 mono- and 2 bipolar, HRSD〉17) and of ten sex- and age-matched controls. The results showed no significant difference in basal calcium levels between the two groups and no significant difference in the Ca2+ response to thrombin although the response was higher in the patients. The Ca2+ increase after serotonin stimulation in depressed patients was significantly (P〈0.05) higher than in healthy controls. By contrast, the Ca2+ response to PHA in lymphocytes was significantly decreased in the patients. Our data confirm elevated Ca2+ responses after 5-HT2 receptor activation even in medicated depressed patients. However, Ca2+ responses in lymphocytes were decreased. Together with the observations of an enhanced Ca2+ response in platelets after thrombin stimulation, we speculate that the findings rather suggest alterations of [Ca2]i regulation in depression than specific changes of serotonergic sensitivity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Clinical and experimental medicine 147 (1968), S. 236-245 
    ISSN: 1591-9528
    Keywords: Parathyroid gland ; Parathormone ; Antibodies ; Antigens ; Nebenschilddrüse ; Parathormon ; Antikörper ; Antigene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nach Sensibilisierung von Kaninchen mit Parathyreoideaextrakt vom Rind waren Antikörper nachweisbar, die speciesspezifisch, jedoch nur zum Teil organspezifisch reagierten. Die organunspezifischen Antikörper richteten sich gegen Bindegewebsantigene in verschiedenen Organen, die organspezifischen gegen Antigene im Cytoplasma der Parenchymzellen der Nebenschilddrüsen. Nach Vergleichsuntersuchungen mit einem Parathormonantiserum sind diese jedoch nicht mit dem Parathormon identisch. Parathormon war immunhistologisch nur in einzelnen Zellen bzw. Zellgruppen der morphologisch identischen Parenchymzellen der Rinderparathyreoidea zu vermuten, was auf Unterschiede im Funktionszustand dieser Zellen zurückgeführt werden kann. Der Nachweis organspezifischer Antikörper läßt das Vorkommen einer Immunparathyreoiditis als möglich erscheinen, jedoch ist der exakte Beweis für eine solche Erkrankung bisher noch nicht erbracht.
    Notes: Summary In the serum of rabbits immunized with an extract of bovine parathyroid glands species-specific antibodies were detectable. Part of them reacted with antigens in the connective tissue of parathyroid glands and other bovine organs, while an organ-specific part of the antibodies was directed against antigens in the cytoplasm of parathyroid cells. Further experiments with a rabbit antiserum to bovine parathormone proved that these organ-specific antigens are only partially identical with parathormone. Histochemical techniques showed that parathormone is detectable only in single cells or in groups of cells of the morphologically identical epithelioid cells of bovine parathyroid glands. The fact that organ-specific antigens have been found in parathyroid glands suggests the existence of an “immune parathyroiditis” although this disease has not yet been exactly proved.
    Type of Medium: Electronic Resource
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