PubMed Health⌕ Search

Biomedical subjects

M Poullet

Publications and source records attributed to M Poullet.

3 recordsLinked to original sources
PubMed1985

Histochemical and biochemical studies of cholinesterases in the carotid labyrinth of amphibians.

Acetylcholinesterase activity was detected in the carotid labyrinth of amphibians by both biochemical and histochemical methods. The histochemical tests showed enzyme activity in surfaces of afferent and efferent nerve terminals in contact with type I cells, but none within the type I cells. Acetylcholinesterase activity occurred on some, though not all, nerve fibers in the extra-cellular spaces. These fibers might be parasympathetic cholinergic fibers innervating blood vessels.

Acetylcholinesterase↗
PubMed1984

Decrease of tailed, asymmetric 16S acetylcholinesterase in rat superior cervical ganglion neurons in vitro after potassium depolarization: partial antagonist action of a calcium-channel blocker.

In primary cell cultures of rat superior cervical ganglia the tailed, asymmetric 16S molecular form of acetylcholinesterase (AChE) is preferentially decreased after potassium depolarization. This effect is not related to noradrenergic differentiation elicited by high potassium concentration. Moreover there is a partial antagonist action of a calcium-channel blocker, methoxyverapamil (D-600). These results suggest that membrane electrical activity exerts a regulatory control on AChE, and Ca2+ fluxes play an important role in regulatory events of AChE biosynthesis.

Acetylcholinesterase↗