BefA, a microbiota-secreted membrane disrupter, disseminates to the pancreas and increases β cell mass.
BefA, a microbiota-secreted membrane disrupter, disseminates to the pancreas and increases β cell mass.
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DOI:
10.1016/j.cmet.2022.09.001
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发表时间:
2022-11-01
期刊:
影响因子:
29
通讯作者:
Guillemin, Karen
中科院分区:
文献类型:
--
作者:
Hill, Jennifer Hampton;Massaquoi, Michelle Sconce;Sweeney, Emily Goers;Wall, Elena S.;Jahl, Philip;Bell, Rickesha;Kallio, Karen;Derrick, Daniel;Murtaugh, L. Charles;Parthasarathy, Raghuveer;Remington, S. James;Round, June L.;Guillemin, Karen
Microbiome dysbiosis is a feature of diabetes, but how microbial products influence insulin production is poorly understood. We report the mechanism of BefA, a microbiome-derived protein that increases proliferation of insulin-producing β-cells during development in gnotobiotic zebrafish and mice. BefA disseminates systemically by multiple anatomic routes to act directly on pancreatic islets. We detail BefA’s atomic structure, containing a lipid-binding SYLF domain, and demonstrate that it permeabilizes synthetic liposomes and bacterial membranes. A BefA mutant impaired in membrane disruption fails to expand β-cells whereas the pore-forming host defense protein, Reg3, stimulates β-cell proliferation. Our work demonstrates that membrane permeabilization by microbiome-derived and host defense proteins is necessary and sufficient for β-cell expansion during pancreas development, potentially connecting microbiome composition with diabetes risk. Hill et al. show in zebrafish and mice that gut bacteria secrete membrane permeabilizing BefA proteins that traffic to the pancreas and stimulates insulin-producing β-cell proliferation. BefA targets competitor bacteria but also interacts with host cells and host antimicrobial proteins also expand β-cells, revealing new microbiome roles in pancreas development.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1107/s0907444904019158
发表时间:
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