期刊
CELL METABOLISM
卷 24, 期 3, 页码 389-401出版社
CELL PRESS
DOI: 10.1016/j.cmet.2016.06.020
关键词
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资金
- Diabetes UK RW and JM Collins Studentship [12/0004601]
- European Foundation for the Study of Diabetes (EFSD) Albert Renold Young Scientist Fellowship
- Studienstiftung des deutschen Volkes PhD Studentship
- European Research Commission [268795]
- Wellcome Trust [WT098424AIA]
- Royal Society Wolfson Research Merit Awards
- MRC [MR/J0003042/1, MR/N00275X/1, MR/L02036X/1]
- Biological and Biotechnology Research Council [BB/J015873/1]
- Diabetes UK Project [11/0004210]
- COST Action [TD1304]
- Diabetes UK [12/0004431]
- EFSD/Novo Nordisk
- Wellcome Trust
- Imperial Confidence in Concept (ICiC) Grants
- Diabetes Research Institute
- IRCCS San Raffaele Scientific Institute (Milan) within European islet distribution program by JDRF [1-RSC-2014-90-I-X]
- Innovative Medicine Initiative Joint Undertaking [155005]
- European Union
- Italian Ministry of University and Research (PRIN)
- JDRF [1-RSC-2014-100-I-X]
- BBSRC [BB/J015873/1] Funding Source: UKRI
- MRC [MR/L02036X/1, MC_PC_14100, MR/K001981/1, MR/N00275X/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/J015873/1] Funding Source: researchfish
- Medical Research Council [MC_PC_14100, MR/L02036X/1, MR/K001981/1, MR/N00275X/1] Funding Source: researchfish
The arrangement of beta cells within islets of Langerhans is critical for insulin release through the generation of rhythmic activity. A privileged role for individual b cells in orchestrating these responses has long been suspected, but not directly demonstrated. We show here that the beta cell population in situ is operationally heterogeneous. Mapping of islet functional architecture revealed the presence of hub cells with pacemaker properties, which remain stable over recording periods of 2 to 3 hr. Using a dual optogenetic/photopharmacological strategy, silencing of hubs abolished coordinated islet responses to glucose, whereas specific stimulation restored communication patterns. Hubs were metabolically adapted and targeted by both pro-inflammatory and glucolipotoxic insults to induce widespread beta cell dysfunction. Thus, the islet is wired by hubs, whose failure may contribute to type 2 diabetes mellitus.
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