Background & Aims: Weight loss via lifestyle intervention remains the mainstay of treatment for nonalcoholic fatty liver disease (NAFLD). Endoscopic bariatric and metabolic therapies (EBMTs) have recently been developed as an alternative treatment option for obesity. This study aimed to assess the effect of FDA-approved EBMTs on NAFLD.
Methods: We searched MEDLINE, EMBASE, Web of Science and Cochrane Central through December 2020 for studies that assessed changes in liver outcomes following EBMT. Primary Outcomes: Liver fibrosis.
Secondary Outcomes: Liver biochemistry, steatosis, NAFLD histological changes and insulin sensitivity. The Grading of Recommendations, Assessment, Development, and Evidence (GRADE) approach was conducted to assess quality of evidence.
Results: Of 4994 potential studies, 18 studies with 863 patients were included. Average weight loss was 14.5% of initial weight at a 6-month follow-up. Primary outcomes: Following EBMT, liver fibrosis significantly reduced by standardized mean difference (SMD) of 0.7 (95% CI, 0.1, 1.3; P = .02).
Secondary Outcomes: There were significant improvements in other NAFLD surrogates including alanine aminotransferase (-9.0 U/L; 95% CI, -11.6, -6.4; P < .0001), hepatic steatosis (SMD: -1.0; 95% CI, -1.2, -0.8; P < .0001) and histologic NAFLD activity score (-2.50; 95% CI, -3.5, -1.5; P < .0001). Other metabolic parameters including insulin resistance and waist circumference also significantly improved. The overall quality of the evidence for primary outcomes was low to very low.
Conclusions: EBMTs appear effective at treating NAFLD with significant improvement in liver fibrosis. Given the worsening NAFLD pandemic and limitations of currently available therapies, EBMTs should be further investigated as a potential treatment option for this patient population.
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