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- W2105045906 abstract "The effects of increasing concentrations of retinol, retinal and retinoic acid on proliferation of bovine mammary epithelial cells were investigated in collagen gel cultures. All retinoids significantly inhibited proliferation of mammary epithelial cells. The relative inhibitory potency of the retinoids was: retinoic acid > retinal > retinol. Maximal inhibition at 10 microg/ml corresponded to a 75-95% inhibition of proliferation obtained in basal medium. Retinol, retinal and retinoic acid also inhibited proliferation of cells growth-stimulated with insulin-like growth factor-I (IGF-I). Retinoids in highest concentrations (10 microg/ml) inhibited 68-85% of proliferation of cells obtained in culture medium containing 25 ng IGF-I/ml. Retinol and retinoic acid also inhibited proliferation of cells growth-stimulated by insulin and other growth factors from the IGF growth factor family (des(1-3)IGF-I and IGF-II), as well as growth factors from the epidermal growth factor family (EGF and TGF-alpha), with retinoic acid being more effective than retinol. At a concentration of 100 ng/ml retinol and retinoic acid inhibited respectively 24-38 and 44-52% of mammary cell proliferation stimulated by growth factors of the IGF family, and at 10,000 ng/ml, 61-71% of cell proliferation was inhibited. The growth-stimulating effect of insulin, EGF and TGF-alpha was inhibited 42-64% by retinol and retinoic acid at 100 ng/ml, and 64-84% at 10,000 ng/ml. The present results show that retinol, retinal and retinoic acid are potent inhibitors of bovine mammary epithelial cell proliferation. It is suggested that retinoids may have concentration-dependent roles in regulation of pubertal mammary growth and development, indicating that the milk yield potential of heifers may be affected by vitamin A status." @default.
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- W2105045906 date "2001-05-01" @default.
- W2105045906 modified "2023-10-10" @default.
- W2105045906 title "Differential effects of retinoids on proliferation of bovine mammary epithelial cells in collagen gel culture" @default.
- W2105045906 doi "https://doi.org/10.1017/s0022029901004782" @default.
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