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NDRG2 in rat liver regeneration: Role in proliferation and apoptosis
Author(s) -
Yang Jiandong,
Li Yan,
Wu Lin,
Zhang Zhaoxia,
Han Tenglong,
Guo Hang,
Jiang Ning,
Tao Kaishan,
Ti Zhenyu,
Liu Xinping,
Yao Libo,
Dou Kefeng
Publication year - 2010
Publication title -
wound repair and regeneration
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.847
H-Index - 109
eISSN - 1524-475X
pISSN - 1067-1927
DOI - 10.1111/j.1524-475x.2010.00614.x
Subject(s) - regeneration (biology) , liver regeneration , microbiology and biotechnology , apoptosis , cell growth , cell cycle , cyclin d1 , biology , chemistry , biochemistry
Liver regeneration is a complex process that is orchestrated by the precise interplay of cell proliferation, differentiation control, and molecular pathways, but this complicated molecular signaling network is not fully understood. In this study, we showed that N‐Myc downstream‐regulated gene 2 (NDRG2) is involved in this process. The mRNA and protein levels of NDRG2 were strongly reduced when liver regeneration reached a peak of activity. In addition, we found that rat NDRG2 expression and C‐Myc expression were inversely correlated during this process. A low level of NDRG2 was observed as the C‐Myc expression increased during regeneration. Moreover, a dramatic cell cycle arrest was found in normal rat liver‐derived BRL cells 48 hours after being infected by adenoviral vectors expressing rat NDRG2. Meanwhile, the apoptotic rates were increased from 9.4% in control group to 64.7% in adenoviral vectors expressing rat NDRG2 group. These phenomena could also be observed in BRL 3A and L‐02 cells. Further analysis revealed that NDRG2 overexpression may mediate the antiproliferative effect by inducing p53 and p21 regulated Bax/Bcl‐2 increase and cyclin E‐Cdk2 inhibition. In conclusion, our findings point to physiological roles for NDRG2 in liver regeneration.