Unpacking Obesity: Molecular Mechanisms and Future Therapeutic Strategies

Obesity is a global health crisis characterized by excessive body fat accumulation, significantly increasing the risk of chronic conditions like type 2 diabetes, cardiovascular disease, and certain cancers. Despite its prevalence, the complex interplay of genetic, environmental, and metabolic factors driving obesity is still being fully elucidated. This review aims to synthesize current understanding of the molecular mechanisms underlying obesity and evaluate the potential of novel therapeutic targets.

The review highlighted that obesity is driven by a complex interplay of factors, including chronic low-grade inflammation, insulin resistance, and dysregulation of appetite-regulating hormones like leptin and ghrelin. They found that individuals with obesity often exhibit 2-3 fold higher levels of inflammatory cytokines such as TNF-α and IL-6. Furthermore, gut microbiome dysbiosis, characterized by a reduced diversity and altered Firmicutes/Bacteroidetes ratio, was consistently observed in 70% of obese cohorts across various studies. The most impactful finding was the consistent efficacy of GLP-1 receptor agonists, demonstrating an average 15-20% body weight reduction in clinical trials, alongside significant improvements in glycemic control and cardiovascular outcomes. Novel targets like GDF15 and FGF21 also showed promising preclinical results, leading to up to 25% fat mass reduction in animal models (p<0.001).