Microbiota regulate intestinal absorption and metabolism of fatty acids in the zebrafish.

Microbiota regulate intestinal absorption and metabolism of fatty acids in the zebrafish.
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DOI:
10.1016/j.chom.2012.08.003
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发表时间:
2012-09-13
影响因子:
30.3
通讯作者:
Rawls JF
Rawls JF
中科院分区:
医学1区
文献类型:
--
作者:
Semova I;Carten JD;Stombaugh J;Mackey LC;Knight R;Farber SA;Rawls JF

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调节肠道膳食脂肪吸收对于维持能量平衡至关重要。虽然肠道微生物群明显影响宿主的能量平衡,但它们在肠道吸收和膳食脂肪肠外代谢中的作用尚不清楚。通过将荧光脂肪酸 (FA) 类似物传递给斑马鱼宿主的体内成像,我们发现微生物群刺激肠上皮和肝脏中 FA 的吸收和脂滴 (LD) 的形成。微生物群以饮食依赖性方式增加上皮 LD 数。食物的存在导致肠道中厚壁菌门细菌的富集。富含饮食的厚壁菌门及其产品足以增加上皮 LD 数量,而其他细菌类型则增加 LD 大小。因此,肠道微生物群的不同成员通过不同的机制促进 FA 吸收。饮食引起的微生物群组成的改变可能会影响脂肪吸收,从而为微生物群与饮食相互作用如何调节宿主能量平衡提供机制见解。
Regulation of intestinal dietary fat absorption is critical to maintaining energy balance. While intestinal microbiota clearly impact the host’s energy balance, their role in intestinal absorption and extra-intestinal metabolism of dietary fat is less clear. Using in vivo imaging of fluorescent fatty acid (FA) analogs delivered to gnotobiotic zebrafish hosts, we reveal that microbiota stimulate FA uptake and lipid droplet (LD) formation in the intestinal epithelium and liver. Microbiota increase epithelial LD number in a diet-dependent manner. The presence of food led to the intestinal enrichment of bacteria from the phylum Firmicutes. Diet-enriched Firmicutes and their products were sufficient to increase epithelial LD number, whereas LD size was increased by other bacterial types. Thus, different members of the intestinal microbiota promote FA absorption via distinct mechanisms. Diet-induced alterations in microbiota composition might influence fat absorption, providing mechanistic insight into how microbiota-diet interactions regulate host energy balance.
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