Effects of gastrointestinal motility on obesity

Nutrition & Metabolism

Jia-Ren Liu³  Shu-Ran Wang¹  Hai-Tao Yu¹  Na Zhang²  Ze Li²  Xiao-Yi Fu¹ 

[1] School of Public Health, JiLin Medical College, 5 JiLin street, JiLin, JiLin Province 132013, The People’s Republic of China;School of Public Health, Harbin Medical University, 157 BaoJian Road, Harbin, HeiLongJiang Province 150081, The People’s Republic of China;Boston Children’s Hospital and Harvard Medical School, 300 LongWood Ave, Boston 02115, USA

关键词: Obesity;    Enteric nervous system;    ICC;    Gastrointestinal motility;   

Others  :  802910
DOI  :  10.1186/1743-7075-11-3

 received in 2013-11-06, accepted in 2013-12-31,  发布年份 2014

【 摘 要 】

Background

Changes of gastrointestinal motility, which are important related to the food digestion and absorption in the gastrointestinal tract, may be one of the factors in obesity-formation.

Aims

The changes of gastrointestinal motility were explored in the rats from diet-induced obesity (DIO), diet-induced obese resistant (DR) or control (CON) by diet intervention.

Methods

After fed with a high fat diet (HFD), 100 male Sprague–Dawley rats were divided into DIO, DR and CON groups. The rats from DIO and DR groups were fed with HFD, and CON with a basic diet (BD) for 6 weeks. Body weight, energy intake, gastric emptying, intestinal transit, motility of isolated small intestine segments and colon’s function were measured in this study. Expression of interstitial cells of Cajal (ICCs) and enteric nervous system (ENS) - choline acetyltransferase (ChAT), vasoactive intestinal peptides (VIP), substance P (SP) and NADPH-d histochemistry of nitric oxide synthase (NOS) were determined by immunohistochemistry.

Results

Body weight and intake energy in the DIO group were higher than those in the DR group (p < 0.05). Gastric emptying of DIO group rats (78.33 ± 4.95%) was significantly faster than that of DR group (51.79 ± 10.72%) (p < 0.01). The peak value of motility in rat’s duodenum from the DR group was significantly higher than that in the DIO group (p < 0.05). In addition, the expression of interstitial cells of Cajal (ICC), choline acetyltransferase (ChAT), substance P (SP), vasoactive intestinal peptides (VIP) and neuronal nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) in the intestine of rats were significantly increased in the DIO group when compared to the DR group (p < 0.05).

Conclusion

A faster gastric emptying, a weaker contraction of duodenum movement, and a stronger contraction and relaxation of ileum movement were found in the rats from the DIO group. It indicated that there has effect of gastrointestinal motility on obesity induced by HFD.

【 授权许可】

   
2014 Fu et al.; licensee BioMed Central Ltd.

【 图 表 】

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