Lacrimal gland budding requires PI3K-dependent suppression of EGF signaling.
Lacrimal gland budding requires PI3K-dependent suppression of EGF signaling.
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泪腺萌芽需要PI 3 K依赖性抑制EGF信号传导。
DOI:
10.1126/sciadv.abf1068
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发表时间:
2021-06
期刊:
影响因子:
13.6
通讯作者:
Zhang X
中科院分区:
文献类型:
--
作者:
Wang Q;Tao C;Hannan A;Yoon S;Min X;Peregrin J;Qu X;Li H;Yu H;Zhao J;Zhang X
The intracellular PI3K, MAPK, and mTOR network controls morphogenesis by regulating the distribution of cell surface receptors. The patterning of epithelial buds is determined by the underlying signaling network. Here, we study the cross-talk between phosphoinositide 3-kinase (PI3K) and Ras signaling during lacrimal gland budding morphogenesis. Our results show that PI3K is activated by both the p85-mediated insulin-like growth factor (IGF) and Ras-mediated fibroblast growth factor (FGF) signaling. On the other hand, PI3K also promotes extracellular signal–regulated kinase (ERK) signaling via a direct interaction with Ras. Both PI3K and ERK are upstream regulators of mammalian target of rapamycin (mTOR), and, together, they prevent expansion of epidermal growth factor (EGF) receptor expression from the lacrimal gland stalk to the bud region. We further show that this suppression of EGF signaling is necessary for induction of lacrimal gland buds. These results reveal that the interplay between PI3K, mitogen-activated protein kinase, and mTOR mediates the cross-talk among FGF, IGF, and EGF signaling in support of lacrimal gland development.
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