BDNF regulates BIM expression levels in 3-nitropropionic acid-treated cortical neurons.

Abstract:

:3-Nitropropionic acid (3-NP) is an irreversible inhibitor of succinate dehydrogenase that has been used to explore the primary mechanisms of cell death associated with mitochondrial dysfunction and neurodegeneration in Huntington's disease. In this study we investigated the ability of brain-derived neurotrophic factor (BDNF) to suppress mitochondrial-dependent cell death induced by 3-NP in primary cortical neurons. This neurotrophin prevented 3-NP-induced release of cytochrome c and Smac/Diablo, caspase-3-like activity and nuclear condensation/fragmentation. Furthermore, it greatly increased phosphorylation of Akt and MAPK, suggesting the involvement of these signalling pathways in BDNF neuroprotection. Interestingly, BDNF decreased the levels of the pro-apoptotic protein Bim in mitochondrial and total cell lysates through the activation of the MEK1/2 pathway. This effect was due to an increase in the degradation rates of Bim. Our data support an important role for BDNF, in protecting cortical neurons against apoptotic cell death caused by inhibition of mitochondrial complex II.

journal_name

Neurobiol Dis

journal_title

Neurobiology of disease

authors

Almeida S,Laço M,Cunha-Oliveira T,Oliveira CR,Rego AC

doi

10.1016/j.nbd.2009.06.006

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

448-56

issue

3

eissn

0969-9961

issn

1095-953X

pii

S0969-9961(09)00143-0

journal_volume

35

pub_type

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