Chloroquine specifically impairs Merkel cell mechanoreceptor function in isolated rat sinus hairs.

Abstract:

:The function of Merkel cells in mechanotransduction has remained controversial Single unit recordings were made from Merkel cell receptors (sinus hair type I, St I) and another slowly adapting mechanoreceptor (sinus hair type II, St II) in isolated rat sinus hairs by applying controlled mechanical displacements to the hair shaft. Chloroquine (50-300 microM) caused a concentration dependent inhibition of Merkel cell receptor responses to mechanical stimulation. In contrast, both stimulated and spontaneous spike activity of St II receptors was increased by the same concentrations of chloroquine. Ultrastructural examination of chloroquine treated sinus hairs revealed swollen Merkel cells with multiple vacuoles and randomly distributed granules while other neural and surrounding structures showed no striking morphological changes. These results suggest that the Merkel cell plays a mechanotransducer role in Merkel cell receptors.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Senok SS,Halata Z,Baumann KI

doi

10.1016/0304-3940(96)12906-2

subject

Has Abstract

pub_date

1996-08-23 00:00:00

pages

167-70

issue

2-3

eissn

0304-3940

issn

1872-7972

pii

0304-3940(96)12906-2

journal_volume

214

pub_type

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