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 Disjournal_title
Neurobiology of diseaseauthors
Almeida S,Laço M,Cunha-Oliveira T,Oliveira CR,Rego ACdoi
10.1016/j.nbd.2009.06.006subject
Has Abstractpub_date
2009-09-01 00:00:00pages
448-56issue
3eissn
0969-9961issn
1095-953Xpii
S0969-9961(09)00143-0journal_volume
35pub_type
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