Abstract

Ovarian cancer is one of the deadliest gynecological cancer, with a low overall 5-year survival rate. RDM1, RAD52 motif-containing protein 1, is sensitive to cisplatin, a common chemotherapy drug and it has an important role inDNA damage repair pathway. Until now, the effect of RDM1 in ovarian cancer is undiscovered. Here, clinical data shows that the tumour tissues of ovarian carcinoma patients with higher mRNA and protein expression of RDM1. Knockdown of RDM1 in ovarian carcinoma cells reduces cell proliferation and promotes apoptosis, consistent with the role RDM1 in the overexpression experiments. The research of xenograft mouse model shows stable knockdown of RDM1 significantly inhibits ovarian cancer tumour growth. These in vitro and in vivo results conclude that RDM1 plays an oncogenic role in human ovarian carcinoma. Interestingly, p53/RAD51/RAD52 signalling pathway can be regulated by RDM1, and the negative regulation of p53 by RDM1 may be one of major mechanisms for RDM1 to accomplish its oncogenic functions in ovarian carcinoma. Therefore, RDM1 may be a new target for the treatment of ovarian carcinoma.

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