We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Reduced activation and expression of ERK1/2 MAP kinase in the post-mortem brain of depressed suicide subjects.
- Authors
Dwivedi, Y; Rizavi, H S; Roberts, R C; Conley, R C; Tamminga, C A; Pandey, G N
- Abstract
The extracellular regulated kinases (ERK) 1 and ERK2 are members of mitogen-activated protein (MAP) kinase family that play an important role in transducing extracellular signals to the nucleus and have been implicated in a broad spectrum of biological responses. To test the hypothesis that MAP kinases may be involved in depression, we examined the activation of p44/42 MAP kinase and expression of ERK1 and ERK2 in the post-mortem brain tissue obtained from non-psychiatric control subjects (n = 11) and age- and the post-mortem interval-matched depressed suicide subjects (n = 11). We observed that p44/42 MAP kinase activity was significantly decreased in the prefrontal cortical areas (Brodmann's areas 8, 9 and 10) and the hippocampus of depressed suicide subjects without any change in the cerebellum. This decrease was associated with a decrease in mRNA and protein levels of ERK1 and ERK2. In addition, the expression of MAP kinase phosphatase (MKP)2, a 'dual function' ERK1/2 phosphatase, was increased in the prefrontal cortex and hippocampus. These studies suggest that p44/42 MAP kinases are less activated in the post-mortem brain of depressed suicide subjects and this may be because of reduced expression of ERK1/2 and increased expression of MKP2. Given the role of MAP kinases in various physiological functions and gene expression, alterations in p44/42 MAP kinase activation and expression of ERK1/2 may contribute significantly to the pathophysiology of depressive disorders.
- Publication
Journal of neurochemistry, 2001, Vol 77, Issue 3, p916
- ISSN
0022-3042
- Publication type
Journal Article
- DOI
10.1046/j.1471-4159.2001.00300.x