Cilostazol protects rat chondrocytes against nitric oxide-induced apoptosis in vitro and prevents cartilage destruction in a rat model of osteoarthritis

被引：54

作者：

Lee, Sung Won ^{[1
]}

Song, Yeon Suk ^{[1
]}

Shin, Sang Hwa ^{[1
]}

Kim, Kyung Taek ^{[1
]}

Park, Young Chul

Park, Bong Soo ^{[2
]}

Yun, Il ^{[2
]}

Kim, Kunhong ^{[3
]}

Lee, Sang Yeob ^{[1
]}

Chung, Won Tae ^{[1
]}

Lee, Hye Jeong ^{[1
]}

Yool, Young Hyun ^{[1
]}

机构：

[1] Dong A Univ Coll Med, Med Sci Res Ctr, Dept Anat & Cell Biol, Pusan 6027143, South Korea

[2] Pusan Natl Univ, Pusan, South Korea

[3] Yonsei Univ, Seoul 120749, South Korea

来源：

ARTHRITIS AND RHEUMATISM | 2008年 / 58卷 / 03期

关键词：

D O I：

10.1002/art.23220

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Objective. To examine whether cilostazol, a selective phosphodiesterase type III inhibitor, protects rat articular chondrocytes against nitric oxide (NO)induced apoptosis and prevents cartilage destruction in mono-iodoacetate-induced osteoarthritis (OA) in a rat model in which inducible nitric oxide synthase (iNOS) is expressed. Methods. The NO donor sodium nitroprusside was administered to rat articular chondrocytes that had been pretreated with cilostazol. Induction of apoptosis was evaluated by DNA electrophoresis and pulsed-field gel electrophoresis. The expression level and the subcellular location of apoptosis-associated factors were examined by Western blot analysis and confocal microscopy, respectively. Protein kinase CK2 (PKCK2) activity was also assayed. To examine whether orally administered cilostazol prevents cartilage destruction in vivo, cartilage samples obtained from rats with experimentally induced OA were subjected to hematoxylin and eosin, Safranin O, and TUNEL staining and immunohistochemical analysis of iNOS expression. Results. Cilostazol prevented NO-induced reduction in viability, in a dose-dependent manner. It also prevented the up-regulation of phosphorylated p53 and p38, the down-regulation of heme oxygenase 1, the subcellular translocation of apoptosis-inducing factor and cytochrome c, and the activation of caspases 3, 7, and 8 induced by NO treatment, indicating that cilostazol prevented NO-induced cell death by blocking apoptosis. In addition, cilostazol prevented NO-induced translocation of cleaved Bid onto mitochondria, and caused phosphorylated Bid to accumulate in the nucleus and cytosol. Cilostazol prevented the down-regulation of PKCK2 and the reduction in PKCK2 activity induced by NO, indicating that its apoptosis-preventing activity was mediated via PKCK2. It also prevented chondrocyte apoptosis and cartilage destruction in a rat model of experimentally induced OA. Conclusion. Our findings indicate that cilostazol prevents NO-induced apoptosis of chondrocytes via PKCK2 in vitro and prevents cartilage destruction in a rat model of OA.

引用

页码：790 / 800

页数：11

共 59 条

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