We have previously identified alterations of K+ channel function, IP3-mediated calcium release, and Cp20 (a memory-associated GTP binding protein) in fibroblasts from AD patients vs. controls. In the present study we introduce a scoring system based on these response alterations that integrates two or more alterations (and their degree) in AD vs. control fibroblasts. This scoring system generates an index that distinguishes AD patients from controls with both high specificity and sensitivity. We also show that low doses of bradykinin elicit intracellular calcium release almost exclusively in AD cell lines in an all or none fashion that provide a clear measurement of enhanced IP3-mediated function in AD vs. controls.
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Hirashima et al. (1996) studied this question.
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