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The Role of Intestinal Microbiota and Mast Cell in a Rat Model of Visceral Hypersensitivity

Journal of Neurogastroenterology and Motility 2020년 26권 4호 p.529 ~ 538
Li Ying-Jie, Li Jing, Dai Cong,
소속 상세정보
 ( Li Ying-Jie ) - Jinzhou Medical University First Affiliated Hospital Department of Gastroenterology
 ( Li Jing ) - Jinzhou Medical University First Affiliated Hospital Department of Gastroenterology
 ( Dai Cong ) - China Medical University First Affiliated Hospital Department of Gastroenterology

Abstract


Background/Aims: To explore the role of intestinal flora and mast cells in visceral hypersensitivity (VH).

Methods: The experimental animals were divided into 4 groups: control group, VH group, VH + VSL#3 group, and VH + ketotifen group. Stool samples were collected from each group (n = 3) for a further analysis using 16S ribosomal DNA gene sequence. Visceral sensitivity was evaluated by abdominal withdrawal reflex (AWR) score. Colon tissues of rats were obtained from each group. Mast cells were detected by toluidine blue staining. The degranulation of mast cells was assessed by transmission electron microscopy.

Results: VH rat model could successfully be induced by acetic acid enema combined with partial limb restraint method. Compared with rats in the control group, AWR score, number of mast cells, and degranulation of mast cells were increased in the VH rats, which could be reduced by administration of ketotifen or probiotic VSL#3. Clostridium sensu stricto 1 abundance was higher in the VH group compared to the control group, which could be restored by application of probiotic VSL#3.

Conclusions: Probiotic VSL#3 decreases visceral sensitivity in VH rats. The mechanism may be related to mast cell and intestinal flora. Change of Clostridium sensu stricto 1 abundance may be a basis for VH observed in irritable bowel syndrome and may be prevented by specific probiotic administration.

키워드

Gastrointestinal microbiome; Irritable bowel syndrome; Mast cells; Probiotics; Rats

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