Program in Cell Biology, Hospital for Sick Children, Toronto, Ontario, Canada.
Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.
Am J Physiol Renal Physiol. 2021 Aug 1;321(2):F121-F134. doi: 10.1152/ajprenal.00059.2021. Epub 2021 Jun 14.
Excessive infiltration of immune cells into the kidney is a key feature of acute and chronic kidney diseases. The family of chemokines comprises key drivers of this process. Fractalkine [chemokine (C-X3-C motif) ligand 1 (CXCL1)] is one of two unique chemokines synthesized as a transmembrane protein that undergoes proteolytic cleavage to generate a soluble species. Through interacting with its cognate receptor, chemokine (C-X3-C motif) receptor 1 (CXCR1), CXCL1 was originally shown to act as a conventional chemoattractant in the soluble form and as an adhesion molecule in the transmembrane form. Since then, other functions of CXCL1 beyond leukocyte recruitment have been described, including cell survival, immunosurveillance, and cell-mediated cytotoxicity. This review summarizes diverse roles of CXCL1 in kidney disease and potential uses as a therapeutic target and novel biomarker. As the CXCL1-CXCR1 axis has been shown to contribute to both detrimental and protective effects in various kidney diseases, a thorough understanding of how the expression and function of CXCL1 are regulated is needed to unlock its therapeutic potential.
免疫细胞过度浸润肾脏是急性和慢性肾脏疾病的一个关键特征。趋化因子家族是这一过程的关键驱动因素。 fractalkine [趋化因子(C-X3-C 基序)配体 1(CXCL1)] 是两种作为跨膜蛋白合成的独特趋化因子之一,该蛋白经历蛋白水解切割以产生可溶性物质。通过与其同源受体趋化因子(C-X3-C 基序)受体 1(CXCR1)相互作用,CXCL1 最初以可溶性形式作为传统趋化因子,以跨膜形式作为粘附分子发挥作用。从那时起,除了白细胞募集之外,CXCL1 的其他功能,包括细胞存活、免疫监视和细胞介导的细胞毒性,也被描述出来。这篇综述总结了 CXCL1 在肾脏疾病中的多种作用及其作为治疗靶点和新型生物标志物的潜在用途。由于 CXCL1-CXCR1 轴已被证明在各种肾脏疾病中既有有害作用也有保护作用,因此需要深入了解 CXCL1 的表达和功能是如何调节的,以释放其治疗潜力。