Recent advances in metabolic and bariatric surgery

Area of Science:

• Metabolic surgery
• Gastroenterology
• Endocrinology

Background:

• Obesity and its comorbidities pose a significant global health burden.
• Bariatric surgery is the most effective treatment for severe obesity, offering weight loss-independent diabetes resolution in some cases.
• The mechanisms behind these metabolic benefits are not fully understood, shifting focus towards neuro-hormonal origins.

Purpose of the Study:

• To review recent basic and clinical findings on major bariatric procedures and experimental operations.
• To explore the neuro-hormonal mechanisms underlying the metabolic effects of bariatric surgery.
• To discuss the emerging roles of bile acids and the gut microbiome in metabolic improvements post-surgery.

Main Methods:

• Review of current literature on adjustable gastric banding, vertical sleeve gastrectomy, Roux-en-Y gastric bypass, and biliopancreatic diversion.
• Examination of findings from experimental procedures like ileal interposition and bile diversion.
• Analysis of recent developments concerning bile acid and gut microbiome influences on metabolism.

Main Results:

• Bariatric surgeries demonstrate significant metabolic benefits, including weight loss-independent diabetes resolution.
• Neuro-hormonal pathways are increasingly recognized as key mediators of these effects.
• Changes in bile acid profiles and gut microbiome composition are associated with metabolic improvements.

Conclusions:

• Metabolic and bariatric surgery offers profound metabolic improvements beyond mere weight loss.
• Understanding the interplay between surgical procedures, neuro-hormonal axes, bile acids, and the gut microbiome is crucial for future advancements.
• Further research into these mechanisms holds promise for optimizing surgical outcomes and developing novel therapeutic strategies.