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Presence of CC Genotype for rs17773430 Could Affect the Percentage of Excess Weight Loss 1 Year After Bariatric Surgery: Tehran Obesity Treatment Study (TOTS)

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Abstract

Background

Morbid obesity could last for a long period of life and increase the risk of morbidity as well as premature mortality. Although bariatric surgery benefits patients by quick weight loss, not all bariatric patients lose the same percentage of weight after a long time from surgery, which may be the result of diet, physical activity, and genetic components.

Objectives

In this study, we evaluated the association between the MC4R gene and both excess weight loss percentage (EWL%) and excess BMI loss percentage (EBMIL%) in a cohort of bariatric surgery patients after 6 and 12 months from surgery.

Methods

A total of 424 bariatric surgery patients who had participated in the Tehran Obesity Treatment Study and had weight measurements after 6 and 12 months from surgery were included in the study. Four SNPs in the MC4R gene were selected for evaluating the associations.

Results

We found that rs17773430 had a significant effect on both EWL% and EBMIL%, especially after 12 months of bariatric surgery. Furthermore, three other SNPs, rs17782313, rs476828, and rs11152213, did not show any significant association with EWL% and EBMIL%.

Conclusion

This study was the first to report on the association of rs17773430 with both EWL% and EBMIL% in a cohort of patients after bariatric surgery. We found that weight loss after surgery is influenced by genetic factors, and there were significant differences between the distribution of EWL% and EBMIL% in morbid obese bariatric patients who have two minor alleles of the rs17773430 and other SNPs.

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Acknowledgments

The authors would like to thank the hospital staff and the Tehran Obesity Center coordinators that took part in this research. Also, special thanks to deCODE genetic company for doing the genetic screening. The authors wish to acknowledge Dr. Forough Ghanbari for the critical editing in English grammar and the syntax of the manuscript.

Funding

This work was funded by the Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

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Authors and Affiliations

  1. Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, PO Box 19195-4763, Tehran, Iran

    Niloufar Javanrouh, Kamran Guity, Bahareh Sedaghati-khayat & Maryam S. Daneshpour

  2. Tehran Obesity Treatment Center, Department of Surgery, Faculty of Medicine, Shahed University, Tehran, Iran

    Alireza Khalaj

  3. Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

    Majid Valizadeh & Maryam Barzin

Authors
  1. Niloufar Javanrouh
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  2. Alireza Khalaj
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  3. Kamran Guity
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  4. Bahareh Sedaghati-khayat
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  5. Majid Valizadeh
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  6. Maryam Barzin
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  7. Maryam S. Daneshpour
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Corresponding authors

Correspondence to Maryam Barzin or Maryam S. Daneshpour.

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Conflict of Interest

The authors declare that they have no conflict of interest.

Statement of Informed Consent

Informed consent was obtained from all individual participants included in the study.

Human Rights/Ethical Approval

This study has been approved by the Human Research Review Committee of the Endocrine Research Center, Shahid Beheshti University of Medical Sciences, No. 2ECRIES 93/03/13.

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Javanrouh, N., Khalaj, A., Guity, K. et al. Presence of CC Genotype for rs17773430 Could Affect the Percentage of Excess Weight Loss 1 Year After Bariatric Surgery: Tehran Obesity Treatment Study (TOTS). OBES SURG 30, 537–544 (2020). https://doi.org/10.1007/s11695-019-04211-w

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  • DOI: https://doi.org/10.1007/s11695-019-04211-w

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