Neuroprotective effects of hesperetin in mouse primary neurones are independent of CREB activation.

Abstract:

:Dietary flavonoids, including the citrus flavanone hesperetin, may have stimulatory effects on cytoprotective intracellular signalling pathways. In primary mouse cortical neurone cultures, but not SH-SY5Y human neuroblastoma cells or human primary dermal fibroblasts (Promocells), hesperetin (100-300nM, 15min) caused significant increases in the level of ERK1/2 phosphorylation, but did not increase CREB phosphorylation. Administration of hesperetin for 18h did not alter gene expression driven by the cyclic AMP response element (CRE), assessed using a luciferase reporter system, but 300nM hesperetin partially reversed staurosporine-induced cell death in primary neurones. Our data show that hesperetin is a neuroprotective compound at concentrations where antioxidant effects are unlikely to predominate. The effects of hesperetin are cell-type dependent and, unlike the flavanol (-)epicatechin, neuroprotection in vitro is not associated with enhanced CREB phosphorylation or CRE-mediated gene expression.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Rainey-Smith S,Schroetke LW,Bahia P,Fahmi A,Skilton R,Spencer JP,Rice-Evans C,Rattray M,Williams RJ

doi

10.1016/j.neulet.2008.04.056

subject

Has Abstract

pub_date

2008-06-13 00:00:00

pages

29-33

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(08)00502-8

journal_volume

438

pub_type

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