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http://dx.doi.org/10.12750/JARB.36.3.121

DNA recombinase Rad51 is regulated with UV-induced DNA damage and the DNA mismatch repair inhibitor CdCl2 in HC11 cells  

You, Hyeong-Ju (Department of Animal Science, Chonnam National University)
Kim, Ga-Yeon (Department of Animal Science, Chonnam National University)
Kim, Seung-Yeon (Department of Animal Science, Chonnam National University)
Kang, Man-Jong (Department of Animal Science, Chonnam National University)
Publication Information
Journal of Animal Reproduction and Biotechnology / v.36, no.3, 2021 , pp. 121-128 More about this Journal
Abstract
Increasing the efficiency of HR (homologous recombination) is important for a successful knock-in. Rad51 is mainly involved in homologous recombination and is associated with strand invasion. The HR-related mismatch repair system maintains HR fidelity by heteroduplex rejection and repair. Therefore, the purpose of this study is to control Rad51, which plays a critical role in HR, through UV-induced DNA damage. It is also to confirm the effect on the expression of MMR related genes (Msh2, Msh3, Msh6, Mlh1, Pms2) and HR-related genes closely related to HR through treatment with the MMR inhibitor CdCl2. The mRNA expression of Rad51 gene was confirmed in both HC11 cells and mouse testes, but the mRNA expression of Dmc1 gene was confirmed only in mouse testes. The protein expression of Rad51 and Dmc1 gene increased in UV-irradiated HC11 cells. After 72 hours of treatment with 1 ㎛ of CdCl2, the mRNA expression level of Msh3, Pms2, and Rad51 decreased, but the mRNA expression level of Msh6 and Mlh1 increased in HC11 cells. There was no significant difference in Msh2 mRNA expression between CdCl2 untreated-group and the 72 hours treated group. In conclusion, HR-related gene (Rad51) was increased by UV-induced DNA damage. Treatment of the MMR inhibitor CdCl2 in HC11 cells decreased the mRNA expression of Rad51.
Keywords
cadmium chloride; homologous recombination; knock-in; mismatch repair; Rad51 recombinase;
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