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Open AccessArticle

The Effect of Sleeve Gastrectomy on Oxidative Stress in Obesity

Surgical Sciences Department, “Sapienza” University of Rome, Viale Regina Elena 261, 00161 Roma, Italy
Department of Surgery, University of California, San Francisco, 1600 Divisadero St. 4th Floor, San Francisco, CA 94115, USA
Core Facilities, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy
Author to whom correspondence should be addressed.
Biomedicines 2020, 8(6), 168;
Received: 18 May 2020 / Revised: 14 June 2020 / Accepted: 16 June 2020 / Published: 19 June 2020
High concentrations of free radicals are present in the blood of obese patients. Free radicals are associated with endothelial dysfunction, diabetes, and neoplastic transformation, all conditions that are closely related to obesity. The purpose of our study was to determine whether bariatric surgery modifies the production of free radicals in obese patients. In total, 20 patients with morbid obesity, who were candidates for laparoscopic sleeve gastrectomy (SG), and 18 controls were enrolled in the study. Oxidative stress was studied in obese subjects before and after sleeve gastrectomy. The evaluation of oxidative stress was carried out on blood samples using electron paramagnetic resonance, a refined spectroscopic technique used to identify and quantify the major free radicals, such as OH, O2, ONOO-, and NO. Oxidative stress was higher in subjects with morbid obesity prior to surgery, compared to the controls (CP• 9.9 ± 0.3 µM vs. 5.8 ± 0.2 µM). After SG, values decreased to levels comparable to those of controls (CP• 5.4 ± 0.2 µM). Further analysis identified O2 as the main free radical responsible for the oxidative stress. Obesity is associated with an increased blood concentration of free radicals. The normalization of free radicals after sleeve gastrectomy highlights another important benefit of this bariatric surgery technique. View Full-Text
Keywords: sleeve gastrectomy; oxidative stress; electron paramagnetic resonance (EPR); bariatric surgery sleeve gastrectomy; oxidative stress; electron paramagnetic resonance (EPR); bariatric surgery
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Metere, A.; Graves, C.E.; Pietraforte, D.; Casella, G. The Effect of Sleeve Gastrectomy on Oxidative Stress in Obesity. Biomedicines 2020, 8, 168.

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