人妻少妇不满足中文字幕,午夜精品在线一区二区91,日韩国产欧美在线一区,秋霞电影院午夜伦A片,国产精品v?欧美精品免费,日韩午夜的免费理论片,97欧美在线看欧美视频免费,人妻一区二区三区不卡视频

Tumor heterogeneity, the presence of multiple distinct subpopulations of cancer cells between patients or among the same tumors, poses a major challenge to current targeted therapies. The way these different subpopulations interact among themselves and the stromal niche environment, and how such interactions affect cancer stem cell behavior has remained largely unknown. Here, it is shown that an FGF-BMP7-INHBA signaling positive feedback loop integrates interactions among different cell populations, including mammary gland stem cells, luminal epithelial and stromal fibroblast niche components not only in organ regeneration but also, with certain modifications, in cancer progression. The reciprocal dependence of basal stem cells and luminal epithelium is based on basal-derived BMP7 and luminal-derived INHBA, which promote their respective expansion, and is regulated by stromal-epithelial FGF signaling. Targeting this interaction loop, for example, by reducing the function of one or more of its components, inhibits organ regeneration and breast cancer progression. The results have profound implications for overcoming drug resistance because of tumor heterogeneity in future targeted therapies. Ma et al. demonstrate that a fibroblast growth factor-bone morphogenetic protein (FGF-BMP) signaling positive feedback loop, involving mammary stem cells, luminal epithelial, and niche components, hinders organ regeneration and breast cancer progression, suggesting a new strategy to overcome cancer heterogeneity and drug resistance. image