A Cyclic AMP Analog and High Potassium Prevent the Death of Cultured Septal Cholinergic Neurons after Nerve Growth Factor Withdrawal

概要

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Survival, following the addition of a cAMP analog and high K^+ to the medium, of cultured fetal septal cholinergic neurons was examined after nerve growth factor (NGF) deprivation. The number of acetylcholinesterase positive cells, which had progressively grown during 11-13 d of culture with NGF (50 ng/ml), was greatly reduced following 5 d of extended culture without NGF (55% of that with NGF). The degeneration of the cholinergic neurons was markedly reduced by addition of dibutyryl cAMP (dbcAMP, 1 mM), forskolin (10μM) or KCl (15 mM) to the medium. K252b, which blocks the survival of NGF, had no effect on the action of dbcAMP. H-8 and nifedipine inhibited the survival of dbcAMP and high KCl, respectively. These results suggest that NGF, dbcAMP and high K^+ promote the survival of septal cholinergic neurons acting via the receptor tyrosine kinase, protein kinase A and a Ca^<2+>-dependent mechanism, respectively.
公益社団法人日本薬学会の論文
1996-01-15