Abstract
Acute kidney injury (AKI) is characterized by a rapid loss of kidney function and an antigen-independent inflammatory process that causes tissue damage, which was one of the main manifestations of kidney ischemia/reperfusion (I/R). Recent studies have demonstrated autophagy participated in the pathological process of acute kidney injury. In this study, we discuss how autophagy regulated inflammation response in the kidney I/R. AKI was performed by renal I/R. Autophagy activator rapamycin (Rap) and inhibitor 3-methyladenine (MA) were used to investigate the role of autophagy on kidney function and inflammation response. After the experiment, kidney tissues were obtained for the detection of autophagy-related protein microtubule-associated protein light chain 3(LC3)II, Beclin1, and Rab7 and lysosome-associated membrane protein type (LAMP)2 protein by reverse transcription-polymerase chain reaction (PT-PCR) and Western blotting, and histopathology and tissue injury scores also. The blood was harvested to measure kidney function (creatinine (Cr) and blood urea nitrogen (BUN) levels) after I/R. Cytokines TNF-α, IL-6, HMGB1, and IL-10 were measured after I/R. I/R induced the expression of LC3II, Beclin1, LAMP2, and Rab7. The activation and inhibition of autophagy by rapamycin and 3-MA were promoted and attenuated histological and renal function in renal I/R rats, respectively. Cytokines TNF-α, IL-6, and HMGB1 were decreased, and IL-10 was further increased after activation of autophagy treated in I/R rats, while 3-MA exacerbated the pro-inflammatory cytokines TNF-α, IL-6, HMGB1, and anti-inflammatory cytokine IL-10 in renal I/R. I/R can activated the autophagy, and autophagy increase mitigated the renal injury by decreasing kidney injury score, levels of Cr and BUN after renal I/R, and inflammation response via regulating the balance of pro-inflammation and anti-inflammation cytokines.
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Abbreviations
- 3-MA:
-
3-Methyladenine
- AKI:
-
Acute kidney injury
- BUN:
-
Blood urea nitrogen
- BW:
-
Body Weight
- Cr:
-
Creatinine
- ELISA:
-
Enzyme-linked immunosorbent assay
- HMGB1:
-
High mobility group box 1
- HRP:
-
Horse reddish peroxidase
- IL:
-
Interleukin
- I/R:
-
Ischemia/reperfusion
- LAMP:
-
Lysosome-associated membrane protein type
- LC3:
-
Microtubule-associated protein light chain 3
- RT:
-
Room temperature
- RT-PCR:
-
Transcription-polymerase chain reaction
- TNF:
-
Tumor necrosis factor
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ACKNOWLEDGMENTS
This work was supported by research grants from the National Natural Science Foundation of China (81372033, 81471842) and the Natural Science Foundation of the Tianjin Science Committee (13JCQNJC11400).
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The authors declare that they have no competing interests.
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Haibin Ling, Hongguang Chen and Miao Wei contributed equally to this work.
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Ling, H., Chen, H., Wei, M. et al. The Effect of Autophagy on Inflammation Cytokines in Renal Ischemia/Reperfusion Injury. Inflammation 39, 347–356 (2016). https://doi.org/10.1007/s10753-015-0255-5
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DOI: https://doi.org/10.1007/s10753-015-0255-5