A Novel Intragastric Satiety-Inducing Device to Inhibit Weight Gain in Juvenile Pigs: a Pilot Study.

Abstract:

BACKGROUND AND AIMS:Minimally invasive therapies for obesity are a bridge between lifestyle interventions and bariatric surgery. We developed a novel device to reduce weight gain rate and evaluated its safety and efficacy in juvenile pigs. METHODS:The intragastric satiety-inducing device (ISD) comprises a self-expandable esophageal metal stent connected to a star-shaped disc placed in the stomach fundus. Eight juvenile pigs were randomized into ISD (n = 5) and control (n = 3) groups. Body weight and serum ghrelin hormone were monitored weekly for 6 weeks. One pig was followed up for 4 additional weeks (rebound pig) after ISD removal. Histological examination and immunohistochemistry for the interstitial cells of Cajal (ICCs) were performed. RESULTS:ISD placement was successful in all pigs. Two ISDs (40%) migrated at 4 and 5 weeks after placement. Weight gain rates were significantly lower in the ISD group than in the control group from week 1 to 6 but were higher in the rebound pig than in a control pig from week 7 to 10. Mean ghrelin hormone level was higher in the control group than in the ISD group from week 1 to 6. ISD induced reversible inflammatory changes in the esophagus and stomach fundus. The number of ICCs was lesser in ISD pigs than in control and rebound pigs. CONCLUSIONS:ISD placement is feasible and safe in juvenile pigs. It decreases weight gain rate but induces reversible inflammatory reaction and tissue hyperplasia. Its mechanism may be related to pressure exertion on the stomach fundus or gastric motility alteration.

journal_name

Obes Surg

journal_title

Obesity surgery

authors

Bakheet N,Na HK,Park JH,Ryu DS,Jeon JY,Khashab MA,Kumbhari V,Tsauo J,Song HY,Hu HT,Kim DH,Jung HY

doi

10.1007/s11695-020-04930-5

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

4643-4651

issue

11

eissn

0960-8923

issn

1708-0428

pii

10.1007/s11695-020-04930-5

journal_volume

30

pub_type

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