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The InR/Akt/TORC1 Growth-Promoting Signaling Negatively Regulates JAK/STAT Activity and Migratory Cell Fate during Morphogenesis

Developmental Cell, ISSN: 1534-5807, Vol: 44, Issue: 4, Page: 524-531.e5
2018
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Cell growth and cell differentiation are two distinct yet coupled developmental processes, but how they are coordinated is not well understood. During Drosophila oogenesis, we found that the growth-promoting InR/Akt/TOR pathway was involved in suppressing the fate determination of the migratory border cells. The InR/Akt/TOR pathway signals through TOR and Raptor, components of TORC1, to downregulate the JAK/STAT pathway, which is necessary and sufficient for border cell fate determination. TORC1 promotes the protein stability of SOCS36E, the conserved negative regulator of JAK/STAT signaling, through physical interaction, suggesting that TORC1 acts as a key regulator coordinating both cell growth and cell differentiation.

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