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Leptin inhibits hepatocyte growth factor-induced ductal morphogenesis of bovine mammary epithelial cells
2007
Yamaji, D.(Hokkaido Univ., Sapporo (Japan)) | Kamikawa, A. | Soliman, M.M. | Ito, T. | Ahmed, M.M. | Makondo, K. | Watanabe, A. | Saito, M. | Kimura, K.
We examined the effect of stroma-derived factors, hepatocyte growth factor (HGF) and leptin, on morphological differentiation of bovine mammary epithelial cells (BMEC) in collagen gel three-dimensional culture in vitro. BMEC treated with HGF, but not leptin, formed duct-like organoids. The formation of organoids by HGF was enhanced by treatment with a mixture of insulin, cortisol and prolactin, while BMEC treated with the mixture alone did not produce the organoid. In contrast, the formation of organoids by HGF was dose-dependently inhibited by simultaneous addition of leptin, regardless of the presence or absence of the hormone mixture. These results suggest that stroma-derived factors intricately regulate mammary epithelial morphogenesis.
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