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Bariatric Surgery

Visceral adipose tissue adiponectin predicts excess weight loss after bariatric surgery in females with severe obesity

Subjects

Abstract

Objective

Bariatric surgery not always results in satisfactory excess weight loss (EWL) in severe obesity. Given the economic and clinical costs of bariatric surgery failure, defining predictors of successful EWL represents a relevant clinical issue for the health system to select patients benefiting from operation.

Methods

By ELISA and Western blot analyses, we assessed the predicting value of pre-operative adiponectin (APN) locally produced in abdominal visceral (VAT) and subcutaneous (SAT) adipose tissue versus plasma levels as a novel sex-linked biomarker of EWL at different time points of follow up (6–24 months) after bariatric surgery in 43 patients (56% females) affected by severe obesity undergoing a small pilot observational study.

Results

VAT-APN was lower in females and represented the only marker significantly correlated with EWL. In females, VAT-APN in the distribution upper quartile but not baseline BMI retained a statistically significant correlation with EWL at any time points (6–24 months) at multivariate analysis. The best VAT-APN cut-off value to predict 95% EWL at 12 months from surgery (98% accuracy, 100% sensitivity, 94% specificity, p = 0.010) was 5.1 µg/mg.

Conclusions

In this very preliminary study, APN in VAT rather than its circulating or subcutaneous levels predicts EWL after bariatric surgery as an independent factor in the female sex only, thus contributing to identify those patients who could much benefit from surgery.

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Fig. 1: APN protein expression in abdominal AT of patients with severe obesity: sex and depot differences.
Fig. 2: EWL association with AT (SAT and VAT) or circulating APN as well as with BMI or W/H in female patients with severe obesity.
Fig. 3: High VAT adiponectin levels are associated with EWL prediction in female severe obesity.

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Data availability

The data of this study are available from the corresponding author, ML, upon reasonable request.

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Acknowledgements

The authors thank Dr. Enrico Facchiano (General and Bariatric Surgery Unit, Santa Maria Nuova Hospital) for his valuable collaboration.

Funding

This publication was produced with the co-funding European Union—Next Generation EU, in the context of The National Recovery and Resilience Plan, Investment 1.5 Ecosystems of Innovation, Project Tuscany Health Ecosystem (THE), CUP: B83C22003920001.

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Authors

Contributions

GC, GQ, ML designed and conceive the study; GQ, NG, MaLu were responsible for patient selection and surgery and obtained patient samples; DAG, LF, AP, LG conducted experiments; GC, GQ, NG, collected patient data; GC, ML analysed data and wrote the manuscript; MM, ML interpreted results, revised the draft manuscript critically for important intellectual content. All authors were involved in writing the paper and had final approval of the submitted version.

Corresponding author

Correspondence to Michaela Luconi.

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The authors declare no competing interests.

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Cantini, G., Quartararo, G., Ghezzi, N. et al. Visceral adipose tissue adiponectin predicts excess weight loss after bariatric surgery in females with severe obesity. Int J Obes 48, 247–253 (2024). https://doi.org/10.1038/s41366-023-01406-1

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