Abstract:Shigella spp. cause diarrhea by invading human intestinal epithelial cells. Effector proteins delivered into target host cells by the Shigella type 3 secretion system modulate host signaling pathways and processes in a manner that promotes infection. The effector OspB activates mTOR, the central cellular regulator of growth and metabolism, and potentiates the inhibition of mTOR by rapamycin. The net effect of OspB on cell monolayers is cell proliferation at infectious foci. To gain insights into the mechanism … Show more
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