Impaired calcium regulation in subcortical vascular encephalopathy

Eckert, A. and Oster, M. and Förstl, H. and Hennerici, M. and Müller, W. E.. (1997) Impaired calcium regulation in subcortical vascular encephalopathy. Stroke, Vol. 28, no. 7 , pp. 1351-1356.

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Official URL: http://edoc.unibas.ch/dok/A5253506

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BACKGROUND AND PURPOSE: A number of clinical observations and first in vitro findings indicate that chronic cerebral ischemia influences immunologic status, such as the proliferative response of T lymphocytes. The purpose of the present report was to assess (1) whether changes of immune function are likewise detectable in patients with progressive subcortical vascular encephalopathy (SVE) by investigating the [Ca2+]i homeostasis of lymphocytes and (2) whether differences exist in calcium regulation between lymphocytes from SVE patients and from Alzheimer's disease (AD) patients. This is of great interest, since specific changes have been reported recently in AD patients. METHODS: [Ca2+]i was recorded in 26 patients with SVE, 26 age-matched nondemented control subjects, and 26 age-matched patients with AD. Basal [Ca2+]i and [Ca2+]i after lymphocyte activation with the mitogen phytohemagglutinin (PHA) were measured with the fura 2 method. In addition, modulation of the Ca2+ signaling by the peptide beta-amyloid and the potassium channel blocker tetraethylammonium was studied. RESULTS: Basal [Ca2+]i was not different between patients and control subjects. After stimulation with PHA, however, a significant reduction of the Ca2+ response could be observed in lymphocytes of SVE patients compared with control subjects and with AD patients, providing evidence that the Ca2+ homeostasis of lymphocytes is impaired in SVE. The effect of the peptide beta-amyloid, the major constituent of senile plaques in AD brain, on Ca2+ signaling was similar in SVE patients and nondemented control subjects but typically reduced in cells of AD patients. Potassium channels were not involved in the impaired Ca2+ response of SVE lymphocytes after cell activation. CONCLUSIONS: [Ca2+]i is not only one of the most important second messengers in signal transduction of many cells but also an early event in the signal cascade of cell proliferation as a reaction to antigen recognition. This mecha
Faculties and Departments:03 Faculty of Medicine > Bereich Psychiatrie (Klinik) > Erwachsenenpsychiatrie UPK
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Psychiatrie (Klinik) > Erwachsenenpsychiatrie UPK
UniBasel Contributors:Eckert, Anne
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Heart Association
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:23
Deposited On:22 Mar 2012 13:35

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