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Biliverdin reductase A in the prevention of cellular senescence against oxidative stress
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  • Biliverdin reductase A in the prevention of cellular senescence against oxidative stress
  • Biliverdin reductase A in the prevention of cellular senescence against oxidative stress
저자명
Kim. Sung-Young,Kang. Hyun-Tae,Choi. Hae-Ri,Park. Sang-Chul
간행물명
Experimental & molecular medicine : EMM
권/호정보
2011년|43권 1호|pp.15-23 (9 pages)
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생화학분자생물학회
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Biliverdin reductase A (BLVRA), an enzyme that converts biliverdin to bilirubin, has recently emerged as a key regulator of the cellular redox cycle. However, the role of BLVRA in the aging process remains unclear. To study the role of BLVRA in the aging process, we compared the stress responses of young and senescent human diploid fibroblasts (HDFs) to the reactive oxygen species (ROS) inducer, hydrogen peroxide ($H_2O_2$). $H_2O_2$ markedly induced BLVRA activity in young HDFs, but not in senescent HDFs. Additionally, depletion of BLVRA reduced the $H_2O_2$-dependent induction of heme oxygenase-1 (HO-1) in young HDFs, but not in senescent cells, suggesting an aging-dependent differential modulation of responses to oxidative stress. The role of BLVRA in the regulation of cellular senescence was confirmed when lentiviral RNAitransfected stable primary HDFs with reduced BLVRA expression showed upregulation of the CDK inhibitor family members p16, p53, and p21, followed by cell cycle arrest in $G_0-G_1$ phase with high expression of senescence-associated ${eta}$-galactosidase. Taken together, these data support the notion that BLVRA contributes significantly to modulation of the aging process by adjusting the cellular oxidative status.