Selective deletion of the endothelial sphingosine-1-phosphate 1 receptor exacerbates kidney ischemia-reperfusion injury

被引:30
作者
Ham, Ahrom [1 ]
Kim, Mihwa [1 ]
Kim, Joo Yun [1 ]
Brown, Kevin M. [1 ]
Fruttiger, Marcus [2 ]
D'Agati, Vivette D. [3 ]
Lee, H. Thomas [1 ]
机构
[1] Columbia Univ, Columbia Univ Coll Phys & Surg, Dept Anesthesiol, Anesthesiol Res Labs, New York, NY 10032 USA
[2] UCL, UCL Inst Ophthalmol, London, England
[3] Columbia Univ, Columbia Univ Coll Phys & Surg, Dept Pathol, New York, NY 10032 USA
关键词
apoptosis; Cre recombinase; inflammation; necrosis; tamoxifen; SPHINGOSINE 1-PHOSPHATE RECEPTOR; PROTEIN-COUPLED RECEPTOR; RENAL ISCHEMIA; HEPATIC ISCHEMIA; S1P(1) RECEPTOR; KNOCKOUT MICE; KINASE; CELLS; EXPRESSION; HSP27;
D O I
10.1038/ki.2013.345
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
The role for the endothelial sphingosine-1-phosphate 1 receptor (S1P(1)R) in acute kidney injury (AKI) remains unclear as germline endothelial S1P1R deletion is embryonically lethal. Here, we generated conditional endothelial S1P1R deficiency by crossing mice with floxed S1P1R with mice expressing a tamoxifen-inducible form of Cre recombinase under the transcriptional control of the platelet-derived growth factor-beta (Pdgf beta) gene. Mice with tamoxifen-induced deletion of endothelial S1P1R had increased renal tubular necrosis, inflammation, and impaired vascular permeability, as well as exacerbated renal tubular apoptosis after ischemic AKI compared with tamoxifen-treated wild-type mice. Moreover, endothelial S1P1R deletion resulted in increased hepatic injury after ischemic AKI. As a potential mechanism for exacerbated renal injury, conditional endothelial S1P1R-null mice had markedly reduced endothelial HSP27 expression compared with wild-type mice. Cultured glomerular endothelial cells treated with a specific S1P1R antagonist (W146) for 3 days also showed reduced HSP27 expression compared with vehicle-treated cells. Finally, mice treated with W146 for 3 days also showed reduced endothelial HSP27 expression as well as exacerbated renal and hepatic injury after ischemic AKI. Thus, our studies demonstrate a protective role for endothelial S1P1R against ischemic AKI most likely by regulating endothelial barrier integrity and endothelial HSP27 expression.
引用
收藏
页码:807 / 823
页数:17
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