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高脂肪饮食增强了对近端小肠大量切除的适应性反应中的绒毛生长。

High-fat diet enhances villus growth during the adaptation response to massive proximal small bowel resection.

机构信息

Division of Pediatric Surgery, St Louis Children's Hospital, One Children's Place, Suite 5S40, St. Louis, MO, 63110, USA.

出版信息

J Gastrointest Surg. 2014 Feb;18(2):286-94; discussion 294. doi: 10.1007/s11605-013-2338-7. Epub 2013 Sep 4.

Abstract

Previous studies have shown that high-fat diet (HFD) enhances adaptation if provided immediately following small bowel resection (SBR). The purpose of this study was to determine if HFD could further enhance villus growth after resection-induced adaptation had already taken place. C57/Bl6 mice underwent a 50 % proximal SBR or sham operation and were then provided a standard rodent liquid diet (LD) ad lib. After a typical period of adaptation (7 days), SBR and sham-operated mice were randomized to receive either LD or HFD (42 % kcal fat) for an additional 7 days. Mice were then harvested, and small intestine was collected for analysis. Adaptation occurred in both SBR groups; however, the SBR/HFD had significantly increased villus height compared to SBR/LD. Reverse transcription-polymerase chain reaction of villus enterocytes showed a marked increase in CD36 expression in the SBR/HFD group compared with SBR/LD mice. While exposure to increased enteral fat alone did not affect villus morphology in sham-operated mice, HFD significantly increased villus growth in the setting of resection-induced adaptation, supporting the clinical utility of enteral fat in augmenting adaptation. Increased expression of CD36 suggests a possible mechanistic role in dietary fat metabolism and villus growth in the setting of short gut syndrome.

摘要

先前的研究表明,高脂肪饮食(HFD)在小肠切除(SBR)后立即提供时可以增强适应性。本研究的目的是确定 HFD 是否可以在切除诱导的适应性已经发生后进一步促进绒毛生长。C57/Bl6 小鼠接受 50%的近端 SBR 或假手术,并随后提供标准啮齿动物液体饮食(LD)随意食用。在典型的适应期(7 天)后,SBR 和假手术组的小鼠被随机分为接受 LD 或 HFD(42%的卡路里脂肪)再 7 天。然后收获小鼠,收集小肠进行分析。两组 SBR 均发生适应性改变;然而,与 SBR/LD 相比,SBR/HFD 组的绒毛高度明显增加。绒毛肠细胞的逆转录-聚合酶链反应显示,与 SBR/LD 组相比,SBR/HFD 组 CD36 的表达明显增加。虽然单独暴露于增加的肠内脂肪不会影响假手术组的绒毛形态,但 HFD 显著增加了切除诱导适应性中的绒毛生长,支持肠内脂肪在增强适应性方面的临床应用。CD36 的表达增加表明在短肠综合征中,它在膳食脂肪代谢和绒毛生长中可能具有潜在的机制作用。

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