Abstract:
:The aim of the present work was to examine the role of muscarinic acetylcholine receptors (mAChRs) on apoptosis in human skin fibroblast cells. Neonatal human skin fibroblast cultures were stimulated with pilocarpine in the presence or absence of specific antagonists. Pilocarpine stimulates apoptosis, total inositol phosphates (InsP) accumulation and nitric oxide synthase (NOS) activity. All these effects were inhibited by atropine, mustard hydrochloride (4-DAMP) and pirenzepine, indicating that M(1) and M(3) mAChRs are implicated in pilocarpine action. Pilocarpine apoptotic action is accompanied by caspase-3 and JNK activation. The intracellular pathway leading to pilocarpine-induced biological effects involved phospholipase C, calcium/calmodulin and extracellular calcium as U-73122, W-7, verapamil, BAPTA and BAPTA-AM blocked pilocarpine effects. L-NMMA, a NOS inhibitor, had no effect, indicating that the enzyme does not participate in the apoptosis phenomenon. These results may contribute to a better understanding of the modulatory role of the parasympathetic muscarinic system on the apoptotic human skin fibroblast process.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Reina S,Sterin-Borda L,Passafaro D,Borda Edoi
10.1002/jcp.21981subject
Has Abstractpub_date
2010-03-01 00:00:00pages
640-7issue
3eissn
0021-9541issn
1097-4652journal_volume
222pub_type
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