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Analysis of TIMP-2 and Vimentin Protein Expression and Epigenetic Reprogramming in Cloned Bovine Placentae  

Kim, Hong-Rye (Research Center for Transgenic Cloned Pigs, Chungnam National University)
Han, Rong-Xun (Research Center for Transgenic Cloned Pigs, Chungnam National University)
Lee, Hye-Ran (Research Center for Transgenic Cloned Pigs, Chungnam National University)
Yoon, Jong-Taek (Genetic Engineering Institute, Hankyong National University)
Cheong, Hee-Tae (School of Veterinary Medicine, Kangwon National University)
Park, Chang-Sik (Research Center for Transgenic Cloned Pigs, Chungnam National University)
Jin, Dong-Il (Research Center for Transgenic Cloned Pigs, Chungnam National University)
Publication Information
Reproductive and Developmental Biology / v.31, no.2, 2007 , pp. 97-102 More about this Journal
Abstract
The objective of this study was to analyzed pattern of proteins expression abnormally in cloned bovine placenta. TIMP-2 protein whose function is related to extracellular matrix degradation and tissue remodeling processes was one of differentially up-regulated proteins in SCNT placenta. And one of down-regulated protein in SCNT placenta was identified as vimentin protein that is presumed to stabilize the architecture of the cytoplasm. The expression patterns of these proteins were validated by Western blotting. To evaluate how regulatory loci. of TIMP-2 and vimentin genes was programmed reprogramming in cloned placenta. the status of DNA methylation in the promoter region of TIMP-2 and vimentin genes was analyzed by sodium Bisulfite mapping. The DNA methylation results showed that there was not difference in methylation pattern of TIMP-2 and vimentin loci between cloned and normal placenta. Histone H3 acetylation state of the nucleosome was analyzed in the cloned placental and normal placenta by Western blotting. A small portion of the protein lysates were subjected to Western blotting with the antibodies against anti acetyl-Histone H3. Overall histone H3 acetylation state of SCNT placenta was significantly higher than those of normal placenta cells. It is postulated that cloned placenta at the end of gestation seems to be unusual in function and morphology of placenta via improper expression of TIMP-2 and vimentin by abnormal acetylation states of cloned genome.
Keywords
Bovine cloned placenta; TIMP-2; Vimentin; Methylation; Acetylation;
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