Background And Aims: We aimed to investigate the time-dependent alterations of serum, adipose tissue WISP1, Nrg4, asprosin, SPX adipokines and serum ER stress markers GRP78, XBP1, ATF6, CHOP in obese patients who underwent laparoscopic sleeve gastrectomy (LSG).
Materials And Methods: Morbidly obese patients (n = 19) and normal-weight individuals (n = 19) were compared. Preoperative (control, obese) and postoperative 1st, 3rd and 6th month (obese) follow-up measurements were obtained. Levels of adipokines, ER stress markers were measured with commercial kits.
Results: Body mass index (BMI), total fat, trunk fat mass, fat percentage of obese patients decreased after LSG. Postoperative serum glucose, insulin, HOMA-IR, triglyceride levels of obese patients decreased, HDL increased. In obese patients, preoperative LDL and total cholesterol, which were not different from control, were higher in the postoperative 6th month measurements. Omentum WISP1, subcutaneous adipose tissue WISP1 and SPX, and serum WISP1, asprosin, CHOP levels were higher, Nrg4 lower in obese patients. Serum Nrg4 was still lower in the postoperative 1st month measurements, while WISP1 was higher in the 3rd and asprosin in the 3rd, 6th months compared to control. 1st and 3rd month ATF6 and 3rd month CHOP concentrations were lower than preoperative values. Serum CHOP measured at the 6th month was significantly higher than control. Negative correlations were observed between serum Nrg4 and fat percentage, TG concentration. CHOP was negatively correlated with fat percentage.
Conclusion: The correlations between changes in serum Nrg4, CHOP and fat percentage highlight the roles of Nrg4 and CHOP in the fat loss following LSG.
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