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*Department of Gastroenterology and Nephrology, Graduate School of Medical Science and Division of Blood Purification, and
Department of Molecular Oncology, Cancer Research Institute, Kanazawa University, Kanazawa,
Department of Forensic Medicine, Wakayama Medical University, Wakayama,
Sanwa Kagaku Co., Inabe, ||Division of Nephrology, Department of Internal Medicine, Kanazawa Medical University, Uchinada, ¶Department of Molecular Preventive Medicine, University of Tokyo, and #Department of Cardiovascular Medicine, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan.
Correspondence to: Dr. Takashi Wada, Division of Blood Purification, Department of Gastroenterology and Nephrology, Graduate School of Medical, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-8641, Japan. Phone: +81-76-265-2000, ext. 3462; Fax: +81-76-234-4250; E-mail: twada{at}medf.m.kanazawa-u.ac.jp
ABSTRACT. Monocyte chemoattractant protein (MCP)-1, also termed monocyte chemotactic and activating factor (MCAF)/CCL2, plays an important role in progressive organ fibrosis. It was hypothesized that MCP-1, through its cognate receptor, CCR2, regulates the pathogenesis and is therapeutically of importance for renal fibrosis. To achieve this goal, the therapeutic efficacy and efficiency in renal fibrosis induced by a unilateral ureteral obstruction nephropathy model in mice by the blockade of MCP-1/CCR2 signaling was studied. The delivery of N-terminal deletion mutant of the human MCP-1 gene, 7ND, into a skeletal muscle ameliorated renal fibrosis by resulting in decrease in the deposit of type I collagen and in reduced expression of TGF-
. Concomitantly, gene transfer of 7ND reduced the cell infiltration, most of which were CCR2-positive macrophages, followed by the decrease in MCP-1 expression in the diseased kidneys. These observations suggest that MCP-1 through CCR2 signaling is responsible for M
recruitment, which augments downstream events, resulting in renal fibrosis. Moreover, these findings imply that gene therapy against MCP-1/CCR2 signaling via the mutant gene transferred strategy may serve a beneficial therapeutic application for renal fibrosis.
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