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Novel Gene Risk Score Predicts Outcomes After RYGB Surgery

Medscape
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June 9, 2025
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By: Marilynn Larkin
A novel gene risk score, informed by machine learning, predicted weight-loss outcomes after Roux-en-Y gastric bypass (RYGB) surgery, a new analysis showed.
Highlights:

“Patients with both a high genetic risk score and rare mutations in the leptin-melanocortin pathway (LMP) had significantly worse outcomes, maintaining only 4.9% total body weight loss [TBWL] over 15 years compared to up to 24.8% in other genetic groups,” Phenomix Sciences Co-founder Andres Acosta, MD, PhD, told Medscape Medical News.​​​​​​​​​​​​​​

Potentially Paradigm-Shifting

Onur Kutlu, MD, associate professor of surgery and director of the Metabolic Surgery and Metabolic Health Program at the Miller School of Medicine, University of Miami, Miami, commented on the study for Medscape Medical News. “By integrating polygenic risk scores into predictive models, the authors offer an innovative method for identifying patients at elevated risk for weight regain following RYGB.”

“Their findings support the hypothesis that genetic predisposition — particularly involving energy homeostasis pathways — may underlie differential postoperative trajectories,” he said. “This approach has the potential to shift the paradigm from reactive to proactive management of weight recurrence.”

Read the full article here.

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