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Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury

  • Authors:
    • Baiyu Zhang
    • Rong Rong
    • Huiyan Li
    • Xuan Peng
    • Liping Xiong
    • Yihan Wang
    • Xueqing Yu
    • Haiping Mao
  • View Affiliations / Copyright

    Affiliations: Department of Nephrology, The First Affiliated Hospital, Sun Yat‑sen University, Key Laboratory of Nephrology, Ministry of Health of China, Guangzhou, Guangdong 510080, P.R. China, Laboratory for Kidney Pathology, Inc., Nashville, TN 37203, USA
    Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 1793-1799
    |
    Published online on: November 13, 2014
       https://doi.org/10.3892/mmr.2014.2939
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Abstract

X‑linked inhibitor of apoptosis protein (XIAP) negatively regulates apoptotic pathways at a post‑mitochondrial level. XIAP functions by directly binding and inhibiting activation of specific caspases. Upon apoptotic stimuli, mitochondrial second mitochondria‑derived activator of caspases (Smac)/direct IAP‑binding protein with low PI (Diablo) is released into the cytosol, which results in displacement of XIAP from caspases. Heat shock protein 72 (HSP72), an anti‑apoptotic protein, prevents mitochondrial injury resulting from acute renal ischemia/reperfusion (I/R), its role in Smac/Diablo and XIAP signaling remains to be elucidated. In the present study, the hypothesis that HSP72 prevents XIAP degradation in vivo and in vitro was assessed. To this purpose, a rat model of I/R injury was used to investigate the renoprotective role of HSP72 by treatment with geranylgeranylacetone (GGA), a specific inducer of HSP72. The mechanism of the cytoprotective properties of HSP72 was also investigated in vitro using adenovirus‑mediated overexpression of HSP72 in adenosine triphosphate (ATP)‑depleted human kidney 2 (HK‑2) cells. Pre‑conditioning rats with GGA attenuated renal tubular cell damage, reduced cell apoptosis, preserved XIAP protein content and improved renal function following I/R injury. An in vitro study was performed in which cells were transiently exposed to 5 mM sodium cyanide in a glucose‑free medium in order to induce apoptosis. Compared with the control, overexpression of HSP72 inhibited Smac/Diablo release from the mitochondria and increased levels of XIAP and pro‑caspase 3 in ATP‑depleted HK‑2 cells. In addition, HSP72 interacted with Smac/Diablo. The present data demonstrates that HSP72 preserves renal function in I/R injury through its anti‑apoptotic effects, which act by suppressing mitochondrial Smac/Diablo release and preserving XIAP protein content.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang B, Rong R, Li H, Peng X, Xiong L, Wang Y, Yu X and Mao H: Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury. Mol Med Rep 11: 1793-1799, 2015.
APA
Zhang, B., Rong, R., Li, H., Peng, X., Xiong, L., Wang, Y. ... Mao, H. (2015). Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury. Molecular Medicine Reports, 11, 1793-1799. https://doi.org/10.3892/mmr.2014.2939
MLA
Zhang, B., Rong, R., Li, H., Peng, X., Xiong, L., Wang, Y., Yu, X., Mao, H."Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury". Molecular Medicine Reports 11.3 (2015): 1793-1799.
Chicago
Zhang, B., Rong, R., Li, H., Peng, X., Xiong, L., Wang, Y., Yu, X., Mao, H."Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury". Molecular Medicine Reports 11, no. 3 (2015): 1793-1799. https://doi.org/10.3892/mmr.2014.2939
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang B, Rong R, Li H, Peng X, Xiong L, Wang Y, Yu X and Mao H: Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury. Mol Med Rep 11: 1793-1799, 2015.
APA
Zhang, B., Rong, R., Li, H., Peng, X., Xiong, L., Wang, Y. ... Mao, H. (2015). Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury. Molecular Medicine Reports, 11, 1793-1799. https://doi.org/10.3892/mmr.2014.2939
MLA
Zhang, B., Rong, R., Li, H., Peng, X., Xiong, L., Wang, Y., Yu, X., Mao, H."Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury". Molecular Medicine Reports 11.3 (2015): 1793-1799.
Chicago
Zhang, B., Rong, R., Li, H., Peng, X., Xiong, L., Wang, Y., Yu, X., Mao, H."Heat shock protein 72 suppresses apoptosis by increasing the stability of X-linked inhibitor of apoptosis protein in renal ischemia/reperfusion injury". Molecular Medicine Reports 11, no. 3 (2015): 1793-1799. https://doi.org/10.3892/mmr.2014.2939
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