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CCR5 deficiency increased susceptibility to lipopolysaccharide-induced acute renal injury

  • Organ Toxicity and Mechanisms
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Abstracts

C-C chemokine receptor 5 (CCR5) regulates leukocyte chemotaxis and activation, and its deficiency exacerbates development of nephritis. Therefore, we investigated the role of CCR5 during lipopolysaccharide (LPS)-induced acute kidney injury. CCR5-deficient (CCR5−/−) and wild-type (CCR5+/+) mice, both aged about 10 months, had acute renal injury induced by intraperitoneal injection of LPS (10 mg/kg). Compared with CCR5+/+ mice, CCR5−/− mice showed increased mortality and renal injury, including elevated creatinine and blood urea nitrogen levels, following LPS challenge. Compared to CCR5+/+ mice, CCR5−/− mice also exhibited greater increases in the serum concentrations of pro-inflammatory cytokines, including tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-1β following LPS challenge. Furthermore, infiltration of macrophages and neutrophils, expression of intracellular adhesion molecule (ICAM)-1, and the number of apoptotic cells were more greatly increased by LPS treatment in CCR5−/− mice than in CCR5+/+ mice. The concentrations of pro-inflammatory cytokines such as TNF-α, IL-6, and IL-1β were also significantly increased in the kidney of CCR5−/− mice after LPS challenge. Moreover, primary kidney cells from CCR5−/− mice showed greater increases in TNF-α production and p38 MAP kinase activation following treatment with LPS compared with that observed in the cells from CCR5+/+ mice. LPS-induced TNF-α production and apoptosis in the primary kidney cells from CCR5−/− mice were inhibited by treatment with p38 MAP kinase inhibitor. These results suggest that CCR5 deficiency increased the production of TNF-α following LPS treatment through increased activation of the p38 pathway in the kidney, resulting in renal apoptosis and leukocyte infiltration and led to exacerbation of LPS-induced acute kidney injury.

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Abbreviations

CCR5:

C-C chemokine receptor 5

LPS:

Lipopolysaccharide

TNF-α:

Tumor necrosis factor alpha

IL:

Interleukin

ICAM-1:

Intercellular adhesion molecule 1

BUN:

Blood urea nitrogen

CCR5+/+ mice:

Wild-type mice

CCR5−/− mice:

CCR5 knockout mice

TUNEL:

Terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling

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Acknowledgments

This work was supported by the National Research Foundation of Korea [NRF] grant funded by the Korea government (MSIP) [Grant Number MRC.2008-0062275 and 2015R1A2A2A09001137].

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The authors declare that there is no duality of interest associated with this manuscript.

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Correspondence to Do Young Yoon or Jin Tae Hong.

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Lee, D.H., Park, M.H., Hwang, C.J. et al. CCR5 deficiency increased susceptibility to lipopolysaccharide-induced acute renal injury. Arch Toxicol 90, 1151–1162 (2016). https://doi.org/10.1007/s00204-015-1530-9

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  • DOI: https://doi.org/10.1007/s00204-015-1530-9

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