GH induced in human breast carcinoma MDA-MB-436S and T47D cells as well as endometrial carcinoma RL95-2 cells increases clonogenicity and attenuates radiation-induced or mitomycin-induced DNA damage by activating DNA damage repair genes BRCA1, BRCA2, and TERT, promoting tumor cell survival. Here, GH1 is linked to breast carcinoma.