Signalling properties of inorganic polyphosphate in the mammalian brain.

Abstract:

:Inorganic polyphosphate is known to be present in the mammalian brain at micromolar concentrations. Here we show that polyphosphate may act as a gliotransmitter, mediating communication between astrocytes. It is released by astrocytes in a calcium-dependent manner and signals to neighbouring astrocytes through P2Y(1) purinergic receptors, activation of phospholipase C and release of calcium from the intracellular stores. In primary neuroglial cultures, application of polyP triggers release of endogenous polyphosphate from astrocytes while neurons take it up. In vivo, central actions of polyphosphate at the level of the brainstem include profound increases in key homeostatic physiological activities, such as breathing, central sympathetic outflow and the arterial blood pressure. Together, these results suggest a role for polyphosphate as a mediator of astroglial signal transmission in the mammalian brain.

journal_name

Nat Commun

journal_title

Nature communications

authors

Holmström KM,Marina N,Baev AY,Wood NW,Gourine AV,Abramov AY

doi

10.1038/ncomms2364

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

1362

issn

2041-1723

pii

ncomms2364

journal_volume

4

pub_type

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