Neuroprotective effect of fucoidan on H2O2-induced apoptosis in PC12 cells via activation of PI3K/Akt pathway.

Abstract:

:One of the plausible ways to prevent the reactive oxygen species (ROS)-mediated cellular injury is dietary or pharmaceutical augmentation of endogenous antioxidant defense capacity. In this study, we investigated the neuroprotective effect of fucoidan on H(2)O(2)-induced apoptosis in PC12 cells and the possible signaling pathways involved. The results showed that fucoidan inhibited the decrease of cell viability, scavenged ROS formation and reduced lactate dehydrogenase release in H(2)O(2)-induced PC12 cells. These changes were associated with an increase in superoxide dismutase and glutathione peroxidase activity, and reduction in malondialdehyde. In addition, fucoidan treatment inhibited apoptosis in H(2)O(2)-induced PC12 cells by increasing the Bcl-2/Bax ratio and decreasing active caspase-3 expression, as well as enhancing Akt phosphorylation (p-Akt). However, the protection of fucoidan on cell survival, p-Akt, the Bcl-2/Bax ratio and caspase-3 activity were abolished by pretreating with phosphatidylinositol-3-kinase (PI3K) inhibitor LY294002. In consequence, fucoidan might protect the neurocytes against H(2)O(2)-induced apoptosis via reducing ROS levels and activating PI3K/Akt signaling pathway.

journal_name

Cell Mol Neurobiol

authors

Gao Y,Dong C,Yin J,Shen J,Tian J,Li C

doi

10.1007/s10571-011-9792-0

subject

Has Abstract

pub_date

2012-05-01 00:00:00

pages

523-9

issue

4

eissn

0272-4340

issn

1573-6830

journal_volume

32

pub_type

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