PMID- 34193412 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220521 IS - 2375-2548 (Electronic) IS - 2375-2548 (Linking) VI - 7 IP - 27 DP - 2021 Jun TI - Lacrimal gland budding requires PI3K-dependent suppression of EGF signaling. LID - 10.1126/sciadv.abf1068 [doi] LID - eabf1068 AB - 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. CI - Copyright (c) 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). FAU - Wang, Qian AU - Wang Q AUID- ORCID: 0000-0002-6166-3081 AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Tao, Chenqi AU - Tao C AUID- ORCID: 0000-0002-4346-7343 AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Hannan, Abdul AU - Hannan A AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Yoon, Sungtae AU - Yoon S AUID- ORCID: 0000-0001-6422-5047 AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Min, Xuanyu AU - Min X AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Peregrin, John AU - Peregrin J AUID- ORCID: 0000-0001-6174-7026 AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Qu, Xiuxia AU - Qu X AUID- ORCID: 0000-0002-9496-4809 AD - Wuxi School of Medicine, Jiangnan University, Wuxi, China. FAU - Li, Hongge AU - Li H AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. FAU - Yu, Honglian AU - Yu H AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. AD - Department of Biochemistry, School of Basic Medicine, Jining Medical University, Jining, Shandong, China. FAU - Zhao, Jean AU - Zhao J AUID- ORCID: 0000-0002-4561-5688 AD - Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA. FAU - Zhang, Xin AU - Zhang X AUID- ORCID: 0000-0001-5555-0825 AD - Departments of Ophthalmology, Pathology, and Cell Biology, Columbia University, New York, NY, USA. xz2369@columbia.edu. LA - eng GR - K99 EY032171/EY/NEI NIH HHS/United States GR - P50 CA168504/CA/NCI NIH HHS/United States GR - P30 EY019007/EY/NEI NIH HHS/United States GR - R01 EY018868/EY/NEI NIH HHS/United States GR - R01 EY031210/EY/NEI NIH HHS/United States PT - Journal Article DEP - 20210630 PL - United States TA - Sci Adv JT - Science advances JID - 101653440 SB - IM PMC - PMC8245041 EDAT- 2021/07/02 06:00 MHDA- 2021/07/02 06:01 PMCR- 2021/06/30 CRDT- 2021/07/01 06:12 PHST- 2020/10/04 00:00 [received] PHST- 2021/05/17 00:00 [accepted] PHST- 2021/07/01 06:12 [entrez] PHST- 2021/07/02 06:00 [pubmed] PHST- 2021/07/02 06:01 [medline] PHST- 2021/06/30 00:00 [pmc-release] AID - 7/27/eabf1068 [pii] AID - abf1068 [pii] AID - 10.1126/sciadv.abf1068 [doi] PST - epublish SO - Sci Adv. 2021 Jun 30;7(27):eabf1068. doi: 10.1126/sciadv.abf1068. Print 2021 Jun.