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World Journal of Emergency Medicine ›› 2023, Vol. 14 ›› Issue (5): 386-392.doi: 10.5847/wjem.j.1920-8642.2023.077

• Original Article • Previous Articles     Next Articles

Effects of mesencephalic astrocyte-derived neurotrophic factor on sepsis-associated acute kidney injury

Saifeng Chen1,2, Xuewei Hao1, Guo Chen2, Guorong Liu2, Xiaoyan Yuan2(), Peiling Shen2(), Dongfeng Guo1,2()   

  1. 1Postgraduate Training Base at Shanghai Gongli Hospital, Ningxia Medical College, Shanghai 200135, China
    2Department of Emergency Medicine, Shanghai Gongli Hospital, Shanghai 200135, China
  • Received:2023-01-06 Accepted:2023-05-20 Online:2023-10-30 Published:2023-09-01
  • Contact: Dongfeng Guo, Email: 1659553830@qq.com; Peiling Shen, Email: shenpl@aliyun.com;Xiaoyan Yuan, Email: yxy_828@126.com

Abstract:

BACKGROUND: To determine the protective role of mesencephalic astrocyte-derived neurotrophic factor (MANF) in regulating sepsis-associated acute kidney injury (S-AKI).
METHODS: A total of 96 mice were randomly divided into the control group, control+MANF group, S-AKI group, and S-AKI+MANF group. The S-AKI model was established by injecting lipopolysaccharide (LPS) at 10 mg/kg intraperitoneally. MANF (200 μg/kg) was administered to the control+MANF and S-AKI+MANF groups. An equal dose of normal saline was administered daily intraperitoneally in the control and S-AKI groups. Serum and kidney tissue samples were obtained for biochemical analysis. Western blotting was used to detect the protein expression of MANF in the kidney, and enzyme-linked immunosorbent assay (ELISA) was used to determine expression of MANF in the serum, pro-inflammatory cytokines (tumor necrosis factor-α [TNF-α] and interleukin-6 [IL-6]). Serum creatinine (SCr), and blood urea nitrogen (BUN) were examined using an automatic biochemical analyzer. In addition, the kidney tissue was observed for pathological changes by hematoxylin-eosin staining. The comparison between two groups was performed by unpaired Student’s t-test, and statistics among multiple groups were carried out using Tukey’s post hoc test following one-way analysis of variance (ANOVA). A P-value <0.05 was considered statistically significant.
RESULTS: At the early stage of S-AKI, MANF in the kidney tissue was up-regulated, but with the development of the disease, it was down-regulated. Renal function was worsened in the S-AKI group, and TNF-α and IL-6 were elevated. The administration of MANF significantly alleviated the elevated levels of SCr and BUN and inhibited the expression of TNF-α and IL-6 in the kidney. The pathological changes were more extensive in the S-AKI group than in the S-AKI+MANF group.
CONCLUSION: MANF treatment may significantly alleviate renal injury, reduce the inflammatory response, and alleviate or reverse kidney tissue damage. MANF may have a protective effect on S-AKI, suggesting a potential treatment for S-AKI.

Key words: Sepsis-associated acute kidney injury, Mesencephalic astrocyte-derived neurotrophic factor, Renal function, Cytokines, Endoplasmic reticulum stress