Effect of Bariatric Surgery on Serum Inflammatory Factors of Obese Patients: a Systematic Review and Meta-Analysis

AbstractObesity is one of the main causes of inflammation. Previous studies have reported inconclusive results regarding the effect of bariatric surgery on inflammatory markers. This systematic review and meta-analysis is aimed at describing the effect of bariatric surgery on C-reactive protein (CRP), interleukin-6 (IL-6), tumor necrosis factor- α (TNF-α). PubMed/Medline and Scopus were systematically searched for all eligible studies from inception to June 2018. Results are expressed as weighted mean difference (MD) with 95% confidence intervals (CI) using a random effects model. Overall, 116 studies which evaluated serum CRP, IL-6, and TNF-α after bariatric surgery were included. Pooled effect size showed significant reduction in serum CRP (− 5.30 mg/l, 95% CI − 5.46, − 5.15,P <  0.001), IL-6 (− 0.58 pg/ml, 95% CI − 0.64, − 0.53,P <  0.001), and TNF-α (− 0.20 pg/ml, 95% CI − 0.39, − 0.02,P = 0.031) with significant heterogeneity across studies (>  95% for all factors). Bariatric surgery significantly lowered inflammatory factors; however, baseline BMI, follow-up duration and type of surgery could impact the extent of observed effects.
Source: Obesity Surgery - Category: Surgery Source Type: research