Abstract
Background
To examine changes in sex hormones after laparoscopic sleeve gastrectomy (LSG) in Chinese obese male patients and their correlation with metabolic parameters including serum uric acid (SUA)
Methods
A total of 56 obese men with body mass index (BMI) 41.9 ± 5.8 kg/m2 undergoing LSG were selected. Thirty-one healthy men with normal BMI were included as controls. Levels of total testosterone (TT), estradiol (E2), sex hormone-binding globulin (SHBG), follicle-stimulating hormone (FSH), luteinizing hormone (LH), SUA, and other metabolic indices were compared pre- and 12 months post-LSG. Calculated free testosterone (cFT) was calculated from TT and SHBG using an empirical equation.
Results
At baseline, low TT and hyperuricemia (HUA) were common in obese men. Twelve months after LSG, statistically significant reduction in weight, BMI, and glucolipid metabolism indices was noted. SUA levels declined remarkably from 474.9 ± 94.6 to 338.8 ± 81.9 μmol/L and the percentage of HUA decreased from 76.8 to 54.1% (all P < 0.001). Additionally, significant increases in TT, SHBG, and cFT as well as a decrease in percentage of low TT were observed after LSG (all P < 0.05), while E2, FSH, and LH did not change significantly. Moreover, changes in TT levels were more pronounced than those of other sex hormones. After age and BMI were adjusted, increased TT levels were correlated significantly with decreased SUA (β = − 1.077, P < 0.05), BMI (β = − 0.712, P < 0.001), and HOMA-IR (β = − 0.652, P < 0.05), as well as increased SHBG (β = 0.759, P < 0.001).
Conclusions
LSG promotes a significant increase in TT levels in Chinese obese men, which may be mediated by substantial weight loss, SUA reduction, and improved insulin resistance (IR).
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Acknowledgments
The authors thank all the endocrinologists, surgeons, and nutritionists of the Multidisciplinary Group in the National Metabolic Management Center of our hospital.
Funding
This project was supported by the Shanghai Committee of Science and Technology of China (Grant No. 17DZ1910603), Fundamental Research Funds for the Central Universities (1501219107), and National Natural Science Foundation of China (NSFC 81500650, 81700752, 81570782).
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• Study design, data analysis, and draft of the work: Cuiling Zhu and Yi Zhang
• Data collection for the work: Ling Zhang, Fangyun Mei, Jingyang Gao, and Bing Zhu
• Performing the surgery and discussing the manuscript: Liesheng Lu and Donglei Zhou
• Final approval of the version to be published: Shen Qu
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Informed consent was obtained from all individual participants of the study. The study was approved by the ethics committee of the Shanghai Tenth People’s Hospital of Tongji University.
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Zhu, C., Zhang, Y., Zhang, L. et al. Changes in Sex Hormones After Laparoscopic Sleeve Gastrectomy in Chinese Obese Men: a 12-Month Follow-Up. OBES SURG 29, 869–877 (2019). https://doi.org/10.1007/s11695-018-3611-3
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DOI: https://doi.org/10.1007/s11695-018-3611-3