Amelioration of cisplatin-induced rat renal lesions by a cyclooxygenase (COX)-2 selective inhibitor

作者：Yamamato Emi; Izawa Takeshi; Sawamoto Osamu; Juniantito Vetnizah; Kuwamura Mitsuru; Yamate Jyoji^*

来源：Experimental and Toxicologic Pathology, 2012, 64(6): 625-631.

DOI：10.1016/j.etp.2010.12.005

• Cisplatin-induced renal failure
• COX-2
• PGE(2)
• Macrophage
• TGF-beta 1

Cyclooxygenase (COX)-2, an inducible form of COX, plays important roles in inflammatory lesions. We investigated effects of a COX-2 selective inhibitor, NS-398, on cisplatin (CDDP)-induced rat renal lesions. As compared with rats injected with a single dose of CDDP (6 mg/kg; CDDP group), rats who were treated everyday with NS-398 (3 mg/kg) after the CDDP injection (inhibitor group), showed the declines of blood urea nitrogen and creatinine values, and the delay of the peak of regenerating renal epithelial cell number (demonstrable with 5%26apos;-bromo-2%26apos;-deoxyuridine immunohistochemistry); these findings suggested cyto-protective effects of the inhibitor. Furthermore, the numbers of ED1-immunopositive macrophages and alpha-smooth muscle actin (alpha-SMA)-immunopositive myofibroblasts were lower in the inhibitor group than in the CDDP group; mRNA expression of transforming growth factor-beta 1 (TGF-beta 1) was also decreased in the inhibitor group. Because the fibrotic area seen after CDDP injection were tended to decrease in the inhibitor group compared with the CDDP group, it was considered that the decreased number of infiltrating macrophages by the inhibitor might lead to the decreased production of TGF-beta 1, thereby resulting in the reduced number of alpha-SMA-positive myofibroblasts responsible for fibrosis. Collectively, although these differences between the CDDP and inhibitor groups were not always marked, the COX-2 inhibitor used in this study could ameliorate the CDDP-induced rat renal lesions.

• 出版日期2012-9