Membrane responses of the leech giant glial cell to the peptide transmitter myomodulin.

Abstract:

:A myomodulin peptide has been suggested to mediate the response of the giant glial cells to stimulation of the Leydig interneuron in the central nervous system of the leech Hirudo medicinalis [Eur. J. Neurosci. 11 (1999) 3125]. We have now studied the glial response to the endogenous leech MM peptide (GMGALRL-NH(2), MMHir). The peptide evokes a membrane outward current (EC(50) approximately 2 microM), which neither desensitizes nor shows any sign of run-down, and elicits a K(+) conductance increase of the glial cell membrane. The peptidase inhibitor phenylmethylsulfonyl fluoride (PMSF) enhances the glial current response, suggesting the presence of endogenous extracellular peptidases.

journal_name

Peptides

journal_title

Peptides

authors

Britz FC,Deitmer JW

doi

10.1016/s0196-9781(02)00255-3

subject

Has Abstract

pub_date

2002-12-01 00:00:00

pages

2117-25

issue

12

eissn

0196-9781

issn

1873-5169

pii

S0196978102002553

journal_volume

23

pub_type

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