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Inhibition of mTOR reduces the expression of antigen uptake receptors and costimulatory molecules in DCs and restrains receptor-mediated phagocytosis [97]

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Indeed, the mechanisms involved in E2-mediated proliferation are associated with the inhibition of the tumor suppressor protein, p53, which, in turn, generates the downstream activation of cyclin-dependent kinases (CDKs) and, consequently, the release of the retinoblastoma protein (Rb) that promote the progression of the cell cycle by activating diverse transcription factors ( On the other hand, E2 is also involved in the differentiation of diverse types of normal tissues, being critical to the generation of lobular-alveolar cells and the development of galactophorous ducts ( Finally, the pro-survival effects of estrogens have been demonstrated in diverse cell types, including germ cells from human testes (Pentikinen et al., 2000), breast cancer cells (Weldon et al., 2004

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