Journal
CELLULAR & MOLECULAR IMMUNOLOGY
Volume 7, Issue 2, Pages 143-151Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/cmi.2009.109
Keywords
sublytic C5b-9; apoptosis; glomerular mesangial cell (GMC); activating transcription factor 3 (ATF3)
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Funding
- National Natural Science Foundations of China [30772016]
- Ministry of Education of China [20060312005]
- Jiangsu Provincial Department of Education [KJB310004]
- Nanjing Medical University [08NMUZ002, 09JC007]
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Sublytic complement C5b-9 complexes can cause cell apoptosis, but the mechanism of glomerular mesangial cell (GMC) apoptosis mediated by these complexes has not been well defined. The activating transcription factor 3 (ATF3) gene is an immediate early gene for the cell to cope with a variety of stress signals and can promote apoptosis of some cells. In this study, ATF3 expression and cell apoptosis in GMCs induced by sublytic C5b-9 were measured, and then the effects of ATF3 gene over-expression or knockdown on GMC apoptosis induced by sublytic C5b-9 were examined at a fixed time. The results showed that both ATF3 expression and GMC apoptosis were markedly increased and ATF3 over-expression obviously increased sublytic C5b-9-induced GMC apoptosis, whereas ATF3 gene silencing had a significant opposite effect. Collectively, these findings indicate that upregulation of ATF3 gene expression is involved in regulating GMC apoptosis induced by sublytic C5b-9 complexes. Cellular & Molecular Immunology (2010) 7, 143-151; doi: 10.1038/cmi.2009.109; published online 8 February 2010
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