期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL SCIENCES
卷 13, 期 2, 页码 219-231出版社
IVYSPRING INT PUBL
DOI: 10.7150/ijbs.16725
关键词
Hyperhomocysteinemia; AKI; apoptosis; cell proliferation; ER stress
资金
- National 973 Program [2012CB517700]
- Nature and Science Foundation of China [81288001, 81521003]
- Natural Science Foundation of Guangdong province [S2013020012748]
Hyperhomocysteinemia (HHcy) has been linked to several clinical manifestations including chronic kidney disease. However, it is not known whether HHcy has a role in the development of acute kidney injury (AKI). In the present study, we reported that HHcy mice developed more severe renal injury after cisplatin injection and ischemia-reperfusion injury shown as more severe renal tubular damage and higher serum creatinine. In response to cisplatin, HHcy mice showed more prevalent tubular cell apoptosis and decreased tubular cell proliferation. Mechanistically, a heightened ER stress and a reduced Akt activity were observed in kidney tissues of HHcy mice after cisplatin injection. Stimulating cultured NRK-52E cells with Hcy significantly increased the fraction of cells in G2/M phase and cell apoptosis together with decreased Akt kinase activity. Akt agonist IGF-1 rescued HHcy-induced cell cycle arrest and cell apoptosis. In conclusion, the present study provides evidence that HHcy increases the sensitivity and severity of AKI.
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