A Standardized Method for Vertical Sleeve Gastrectomy Bariatric Surgery Investigations in Cancer

Area of Science:

• Oncology
• Metabolic Disease
• Immunology

Background:

• Obesity is a global epidemic linked to increased cancer risk and poor outcomes.
• Bariatric surgery, particularly vertical sleeve gastrectomy (VSG), is the most effective method for sustained weight loss and is known to decrease cancer risk.
• Understanding the mechanisms behind bariatric surgery's cancer-protective effects is crucial, especially given the rise in obesity and bariatric procedures.

Purpose of the Study:

• To develop and validate a robust preclinical model of bariatric surgery-induced weight loss in mice.
• To establish detailed procedures and best practices for using this model to investigate the mediators of cancer risk reduction following bariatric surgery.
• To facilitate the study of how weight loss, achieved through bariatric surgery, influences cancer onset and outcomes, including anti-tumor immunity.

Main Methods:

• Development of a rigorous protocol for vertical sleeve gastrectomy (VSG) in mice, including stringent pre- and post-operational measures to ensure reproducible weight loss.
• Utilization of multiple mouse strains to establish detailed procedures and identify critical controls for examining cancer mediators.
• Description of methods for collecting fecal samples, intestinal samples, and Peyer's patches to analyze their role in bariatric surgery's impact on cancer risk.

Main Results:

• Establishment of a robust and reproducible preclinical model for studying bariatric surgery-induced weight loss in obese mice.
• Defined procedures, best practices, and necessary controls for investigating cancer onset mediators.
• Detailed methods for collecting key biological samples (gut microbiota, Peyer's patches) relevant to bariatric surgery's effects on cancer.

Conclusions:

• The developed VSG mouse model provides a valuable platform for elucidating the mechanisms underlying bariatric surgery's cancer-protective effects.
• This model allows for the investigation of how weight loss impacts cancer risk and outcomes, including the role of the gut microbiome and anti-tumor immunity.
• The findings support the growing body of research examining the interplay between obesity, weight loss interventions, and cancer, paving the way for future therapeutic strategies.