Effects of human Na(+)/dicarboxylate cotransporter 3 on the replicative senescence of human embryonic lung diploid fibroblasts.
To investigate the role of human Na(+)/dicarboxylate cotransporter 3 (hNaDC3) in the replicative senescence of normal human embryonic lung diploid fibroblasts (WI-38), a retroviral vector containing hNaDC3 was constructed. hNaDC3 was introduced into normal WI-38 cells through infection with the retroviral virus. Monoclones were selected with G418. The integration and expression of exotic genes were confirmed by Northern blot and Western blot. When compared with the control cells, WI-38 cells transfected with hNaDC3 cDNA showed significant suppression of growth rate (by 40%), increase of positive rate of SA-beta-gal staining, decrease of mitochondrial membrane potential, shortening of telomere length, and increase of P16 and P21 expression. The morphology characteristics of senescent fibroblasts appeared earlier. Our results have, for the first time, demonstrated that high expression of hNaDC3 may be able to, at least partly, promote the cellular senescence of human diploid fibroblasts.
Department of Nephrology, Kidney Center and Key Lab of PLA, General Hospital of PLA, Fuxing Road 28, Beijing 100853, People's Republic of China. xmchen@public.bta.net.cn
Xiangmei
X
Chen
Dongwei
D
Cao
Jianzhong
J
Wang
Li
L
Yuan
Zhe
Z
Feng
Bo
B
Fu
Quan
Q
Hong
Xiaojie
X
Zhang
Xueyuan
X
Bai
Yang
Y
Lu
Rui
R
Ding
D015152:Blotting, Northern; D015153:Blotting, Western; D002453:Cell Cycle; D016922:Cellular Senescence / Q000502:physiology*; D029382:Dicarboxylic Acid Transporters / Q000502:physiology*; D004171:Diploidy; D005347:Fibroblasts / Q000502:physiology*; D005822:Genetic Vectors; D006801:Humans; D008168:Lung / Q000166:cytology / Q000196:embryology; D029363:Organic Anion Transporters, Sodium-Dependent / Q000502:physiology*; D027981:Symporters / Q000502:physiology*; D016615:Telomere / Q000502:physiology; D013778:Tetrazolium Salts; D013844:Thiazoles; D014162:Transfection
D029382:Dicarboxylic Acid Transporters; D029363:Organic Anion Transporters, Sodium-Dependent; C092524:SLC13A2 protein, human; D027981:Symporters; D013778:Tetrazolium Salts; D013844:Thiazoles; C022616:thiazolyl blue