Mol Cell Endocrinol 1978 Nov 01;122:151-66. doi: 10.1016/0303-7207(78)90111-9.

Estradiol-induced accumulation of vitellogenin mRNA and secretion of vitellogenin in liver cultures of Xenopus.

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Explants of male Xenopus liver maintained in a serum-free culture medium respond to stimulation by 2 X 10(-8) M 17beta-estradiol with an increasing rate of accumulation of vitellogenin mRNA, as revealed by hybridization of cDNA to the total cytoplasmic RNA extracted from the cultures. A similar response is observed for secretion of 32PO4-labeled vitellogenin into the culture medium. The in vitro response is improved in liver tissue of prestimulated animals, and by adaptation of liver explants to the culture medium prior to hormone treatment, but attains only about 10% of the in vivo response. Since essential features of the in vivo response are maintained in liver explants, organ culture appears suitable for investigating initial events of estradiol action leading to enhanced synthesis of vitellogenin.

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