Pannexin1 is part of the pore forming unit of the P2X(7) receptor death complex.

Abstract:

:The purinergic receptor P2X(7) is part of a complex signaling mechanism participating in a variety of physiological and pathological processes. Depending on the activation scheme, P2X(7) receptors in vivo are non-selective cation channels or form large pores that can mediate apoptotic cell death. Expression of P2X(7)R in Xenopus oocytes results exclusively in formation of a non-selective cation channel. However, here we show that co-expression of P2X(7)R with pannexin1 in oocytes leads to the complex response seen in many mammalian cells, including cell death with prolonged ATP application. While the cation channel activity is resistant to carbenoxolone treatment, this gap junction and hemichannel blocking drug suppressed the currents induced by ATP in pannexin1/P2X(7)R co-expressing cells. Thus, pannexin1 appears to be the molecular substrate for the permeabilization pore (or death receptor channel) recruited into the P2X(7)R signaling complex.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Locovei S,Scemes E,Qiu F,Spray DC,Dahl G

doi

10.1016/j.febslet.2006.12.056

subject

Has Abstract

pub_date

2007-02-06 00:00:00

pages

483-8

issue

3

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(07)00033-6

journal_volume

581

pub_type

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