Importance of extranuclear estrogen receptor-alpha and membrane G protein-coupled estrogen receptor in pancreatic islet survival.
Importance of extranuclear estrogen receptor-alpha and membrane G protein-coupled estrogen receptor in pancreatic islet survival.
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DOI:
10.2337/db09-0257
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发表时间:
2009-10
期刊:
影响因子:
7.7
通讯作者:
Mauvais-Jarvis F
中科院分区:
文献类型:
--
作者:
Liu S;Le May C;Wong WP;Ward RD;Clegg DJ;Marcelli M;Korach KS;Mauvais-Jarvis F
We showed that 17β-estradiol (E2) favors pancreatic β-cell survival via the estrogen receptor-α (ERα) in mice. E2 activates nuclear estrogen receptors via an estrogen response element (ERE). E2 also activates nongenomic signals via an extranuclear form of ERα and the G protein–coupled estrogen receptor (GPER). We studied the contribution of estrogen receptors to islet survival. We used mice and islets deficient in estrogen receptor-α (αERKO−/−), estrogen receptor-β (βERKO−/−), estrogen receptor-α and estrogen receptor-β (αβERKO−/−), and GPER (GPERKO−/−); a mouse lacking ERα binding to the ERE; and human islets. These mice and islets were studied in combination with receptor-specific pharmacological probes. We show that ERα protection of islet survival is ERE independent and that E2 favors islet survival through extranuclear and membrane estrogen receptor signaling. We show that ERβ plays a minor cytoprotective role compared to ERα. Accordingly, βERKO−/− mice are mildly predisposed to streptozotocin-induced islet apoptosis. However, combined elimination of ERα and ERβ in mice does not synergize to provoke islet apoptosis. In αβERKO−/− mice and their islets, E2 partially prevents apoptosis suggesting that an alternative pathway compensates for ERα/ERβ deficiency. We find that E2 protection of islet survival is reproduced by a membrane-impermeant E2 formulation and a selective GPER agonist. Accordingly, GPERKO−/− mice are susceptible to streptozotocin-induced insulin deficiency. E2 protects β-cell survival through ERα and ERβ via ERE-independent, extra-nuclear mechanisms, as well as GPER-dependent mechanisms. The present study adds a novel dimension to estrogen biology in β-cells and identifies GPER as a target to protect islet survival.
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影响因子:
4.8
作者:
Martensson, Ulrika E. A.;Salehi, S. Albert;Leeb-Lundberg, L. M. Fredrik
通讯作者:
Leeb-Lundberg, L. M. Fredrik
影响因子:
7.7
作者:
Donath, MY;Gross, DJ;Kaiser, N
通讯作者:
Kaiser, N
影响因子:
15.9
作者:
Mauvais-Jarvis, F;Ueki, K;Kahn, CR
通讯作者:
Kahn, CR
DOI:
10.1073/pnas.0602956103
发表时间:
2006-06-13
影响因子:
11.1
作者:
Le May, Cedric;Chu, Khoi;Mauvais-Jarvis, Franck
通讯作者:
Mauvais-Jarvis, Franck
影响因子:
4.8
作者:
Nadal, A;Rovira, JM;Soria, B
通讯作者:
Soria, B