LGL1 binds to Integrin β1 and inhibits downstream signaling to promote epithelial branching in the mammary gland.
LGL1 binds to Integrin β1 and inhibits downstream signaling to promote epithelial branching in the mammary gland.
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DOI:
10.1016/j.celrep.2022.110375
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发表时间:
2022-02-15
期刊:
影响因子:
8.8
通讯作者:
Liu, Pengfei
中科院分区:
文献类型:
--
作者:
Ma, Rongze;Gong, Difei;You, Huanyang;Xu, Chongshen;Lu, Yunzhe;Bergers, Gabriele;Werb, Zena;Klein, Ophir D.;Petritsch, Claudia K.;Liu, Pengfei
Branching morphogenesis is a fundamental process by which organs in invertebrates and vertebrates form branches to expand their surface areas. The current dogma holds that directional cell migration determines where a new branch forms and thus patterns branching. Here, we asked whether mouse Lgl1, a homolog of the Drosophila tumor suppressor Lgl, regulates epithelial polarity in the mammary gland. Surprisingly, mammary glands lacking Lgl1 have normal epithelial polarity, but they form fewer branches. Moreover, we find that Lgl1 null epithelium is unable to directionally migrate, suggesting that migration is not essential for mammary epithelial branching as expected. We show that LGL1 binds to Integrin β1 and inhibits its downstream signaling, and Integrin β1 overexpression blocks epithelial migration, thus recapitulating the Lgl1 null phenotype. Altogether, we demonstrate that Lgl1 modulation of Integrin β1 signaling is essential for directional migration and that epithelial branching in invertebrates and the mammary gland is fundamentally distinct. Ma et al. show that Lgl1 is essential for mammary gland branching morphogenesis but not epithelial polarity. Lgl1 is required for directional migration by regulating Integrin β1 signaling levels and focal adhesion strengths. Finally, branching mechanisms are distinct between mammary gland and Drosophila systems where directional migration is indispensable.
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影响因子:
16.6
作者:
Daynac M;Chouchane M;Collins HY;Murphy NE;Andor N;Niu J;Fancy SPJ;Stallcup WB;Petritsch CK
通讯作者:
Petritsch CK
DOI:
10.1083/jcb.200601059
发表时间:
2006-06-05
期刊:
The Journal of cell biology
影响因子:
--
作者:
Akhtar N;Streuli CH
通讯作者:
Streuli CH
影响因子:
8
作者:
Grifoni, D;Garoia, F;Strand, D
通讯作者:
Strand, D
影响因子:
21.3
作者:
通讯作者:
--
影响因子:
3.3
作者:
Cabernard, C;Neumann, M;Affolter, M
通讯作者:
Affolter, M