Mosquito midgut stem cell cellular defense response limits Plasmodium parasite infection
Ferreira Barletta, A. B.; Smith, J.; Burkart, E.; Bondarenko, S.; Sharakhov, I. V.; Criscione, F.; O'Brochta, D.; Barillas-Mury, C.
Show abstract
A novel cellular response of midgut progenitors (stem cells and enteroblasts) to Plasmodium berghei infection was investigated in Anopheles stephensi. The presence of developing oocysts triggers proliferation of midgut progenitors that is modulated by the Jak/STAT pathway, and proportional to the number of oocysts on individual midguts. The percentage of parasites in direct contact with enteroblasts increases over time, as progenitors proliferate. Enhancing proliferation of progenitors significantly decreases oocyst numbers, while limiting proliferation increases oocyst survival. Live imaging revealed that enteroblasts interact directly with oocysts and eliminate them. Midgut progenitors sense the presence of Plasmodium oocysts and mount a cellular defense response that involves extensive proliferation and tissue remodeling, followed by oocysts lysis and phagocytosis of parasite remnants by enteroblasts. One-Sentence SummaryMosquito midgut stem cells detect Plasmodium parasites, proliferate and enteroblasts actively eliminate oocysts.
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