Journal
FEBS LETTERS
Volume 579, Issue 1, Pages 167-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2004.11.070
Keywords
WAPL; 2,3,7,8-tetrachlorodibenzo-p-dioxin; spermatogenesis; synaptonemal complex
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2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is an endocrine disruptor that produces a variety of toxic effects. We have isolated a mouse homolog of the hWAPL gene, termed mouse WAPL (mWAPL), as a target of TCDD by cDNA representational difference analysis from mouse embryonic stern cells. A statistically significant increase in mWAPL expression was observed at 0.1 mum TCDD in AhR(-/-) mouse embryonic fibroblast cells. Interestingly at 1 mum TCDD, in WAPL mRNA levels decreased in AhR(+/+) cells, but further increased in AhR(-/-) cells. hWAPL and mWAPL were highly expressed only in testes among normal tissue samples, and we observed mWAPL localization in the synaptonemal complex of testicular chromosomes. In addition, mouse testes decreased the expression of mWAPL mRNA after a single intraperitoneal injection of TCDD. Thus, mammalian WAPL such as hWAPL and mWAPL may be involved in spermatogenesis and be target genes mediating the reproductive toxicity induced by TCDD. (C) 2004 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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