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Endoscopy 2018; 50(10): 1001-1016
DOI: 10.1055/a-0584-7262
Original article
© Georg Thieme Verlag KG Stuttgart · New York

Preventive effect of mesenchymal stem cell culture supernatant on luminal stricture after endoscopic submucosal dissection in the rectum of pigs

Momoko Tsuda
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
,
Shunsuke Ohnishi
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
,
Takeshi Mizushima
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
,
Hidetaka Hosono
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
,
Kenichi Yamahara
2   Department of Transfusion Medicine and Cell Therapy, Hyogo College of Medicine, Nishinomiya, Japan
,
Marin Ishikawa
3   Division of Endoscopy, Hokkaido University Hospital, Sapporo, Japan
,
Satoshi Abiko
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
,
Takehiko Katsurada
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
,
Yuichi Shimizu
3   Division of Endoscopy, Hokkaido University Hospital, Sapporo, Japan
,
Naoya Sakamoto
1   Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
› Author Affiliations
Further Information

Publication History

submitted 20 November 2017

accepted after revision 30 January 2018

Publication Date:
24 April 2018 (online)

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Video Comment on Momoko Tsuda et al.Endoscopy 2018; 50(10): v34-v34
DOI: 10.1055/a-0668-7314

Abstract

Background Mesenchymal stem cells (MSCs) are valuable in regenerative medicine, and MSC culture supernatant (MSC-CS) reportedly inhibits inflammation and fibrosis. We investigated whether colorectal luminal stricture develops after circumferential endoscopic submucosal dissection (ESD) in the colorectum, and whether the development of luminal stricture could be prevented by using MSC-CS enema.

Methods In the first experiment, we performed circumferential ESD in the rectums or distal colons of pigs (n = 4 in each group). We sacrificed the pigs on Day 22 and measured the degree of luminal stricture. In the second experiment, we performed circumferential ESD in the rectums of pigs and administered an MSC-CS gel or a control gel enema after ESD for 4 days. We sacrificed the pigs on Day 8 (n = 3 in each group) or 22 (n = 3 in each group) to measure the degree of luminal stricture, and performed histological analysis.

Results Severe luminal stricture was observed in the rectum but not in the distal colon. Moreover, fiber accumulation in the submucosa and hypertrophy of the muscularis propria were observed in the rectum but not in the distal colon. The degree of luminal stricture in the rectum was significantly lower in the MSC-CS group than in the control group. Furthermore, MSC-CS attenuated myofibroblast activation and hypertrophy of the muscularis propria on Day 22, and reduced inflammatory cell infiltration on Day 8.

Conclusions Luminal stricture after ESD developed only in the rectum because of the difference in myofibroblast activation and fiber accumulation. In addition, MSC-CS enema prevented luminal stricture after ESD, possibly by inhibiting the inflammatory reaction and fibrosis.

 

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