Effects of Retinoid Glucuronides on Mammary Gland Development in Organ Culture

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Abstract
Retinoyl β-glucuronide (RAG) and retinyl β-glucuronide (ROG) inhibit prolactin-induced morphological developments in cultured mouse mammary gland, and are equally effective in depressing prolactin and steroid hormone-induced DNA synthesis in the same tissue. Retinol is essentially inactive by both assay-methods. Although RAG and ROG show little or no toxicity in several cell and animal models, some possibly toxic manifestations were seen at higher concentrations in cultured mammary tissue. Nonetheless, because of the strong correlation between the actions of chemopreventive agents in culture mouse mammary glands and their effectiveness in vivo, the retinoid glucuronides may well prove to be useful cancer chemopreventive agents.

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