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 Surgjournal_title
Obesity surgeryauthors
Bakheet N,Na HK,Park JH,Ryu DS,Jeon JY,Khashab MA,Kumbhari V,Tsauo J,Song HY,Hu HT,Kim DH,Jung HYdoi
10.1007/s11695-020-04930-5subject
Has Abstractpub_date
2020-11-01 00:00:00pages
4643-4651issue
11eissn
0960-8923issn
1708-0428pii
10.1007/s11695-020-04930-5journal_volume
30pub_type
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