[Intestinal microflora, obesity and type 2 diabetes]

Area of Science:

• Microbiology and Immunology
• Metabolic Disorders
• Gastroenterology

Context:

• Obesity and type 2 diabetes are complex metabolic disorders influenced by multiple factors.
• The gut microbiome's role in metabolic health is an area of intense research.
• Chronic low-grade inflammation is increasingly recognized as a contributing factor to these conditions.

Purpose:

• To review the literature on the interplay between intestinal microflora, host genetics, diet, and environmental factors in obesity and type 2 diabetes.
• To explore the mechanisms by which gut dysbiosis and bacterial products contribute to metabolic dysfunction.
• To discuss the role of immune system dysregulation in these diseases.

Summary:

• Literature suggests that diet and intestinal microflora are critical for the development of obesity and type 2 diabetes in experimental models.
• Increased intestinal permeability facilitates the translocation of gut bacteria and endotoxins (LPS), leading to systemic inflammation, adiposity, and insulin resistance.
• The absence of receptor CD14 prevents LPS-induced inflammatory responses, highlighting its crucial role in endotoxin signaling.

Impact:

• Understanding these mechanisms can inform novel therapeutic strategies targeting the gut microbiome and immune pathways for metabolic diseases.
• Highlights the importance of host-microbe interactions in maintaining metabolic homeostasis.
• Provides insights into the pathogenesis of obesity and type 2 diabetes, linking gut health to systemic metabolic regulation.