Embryonic Exposure to Diclofenac Disturbs Actin Organization and Leads to Myofibril Misalignment

作者：Chen Ying Hsin; Chang Chao Yuan; Wang Yun Hsin; Wen Chi Chung; Chen Yun Chen; Hu Sheng Chuan; Yu Dah Shyong; Chen Yau Hung

来源：Birth Defects Research Part B: Developmental and Reproductive Toxicology , 2011, 92(2): 139-147.

DOI：10.1002/bdrb.20292

• actin
• diclofenac
• myotoxic
• myod
• zebrafish

The objective of this study was to investigate the embryotoxicity of diclofenac. Zebrafish (Danio rerio) embryos at 12 hpf were treated with different dosages of diclofenac (0-2,000 ppm) for different time courses (12-72 hr). Results showed no evident differences in survival rates or morphological changes between the mock-treated control (0 ppm) zebrafish embryos and those with 1-ppm diclofenac-exposure (12-24, 12-36 hpf). In contrast, after higher doses (5 and 10 ppm) of exposure, embryos displayed some defective phenotypes, including malformed somite boundary, a twisted body axis, and shorter body length. In addition, diclofenac-treated embryos exhibited significantly reduced frequencies of spontaneous in-chorion contractions in comparison with mock-control littermates (mock-control: 13.20 +/- 2.24 vs. 5-10ppm diclofenac: 6.66 +/- 1.35-3.03 +/- 1.84). Subtle changes were easily observed by staining with specific monoclonal antibodies F59 and phalloidin to detect morphological changes in muscle fibers and formation of F-actin, respectively. Our data show that diclofenac treatment disturbs actin organization and muscle fiber alignment, thus causing malformed somite phenotypes. Birth Defects Res (Part B) 92:139-147, 2011.

• 出版日期2011-4
• 单位河北医科大学