Adipogenesis Under Leptin Control: Mechanisms and Model-Specific Effects.

Area of Science:

• * Adipose tissue biology
• * Metabolic regulation
• * Cellular differentiation

Background:

• * Adipogenesis is the process of mesenchymal stem cell (MSC) differentiation into adipocytes, leading to adipose tissue expansion.
• * Leptin, an adipokine secreted during adipogenesis, is traditionally viewed as a marker of fat mass.
• * Emerging evidence suggests leptin may actively regulate adipogenesis, but its precise role is debated.

Purpose of the Study:

• * To review and synthesize current evidence on leptin's influence on adipogenesis.
• * To explore the molecular mechanisms and signaling pathways involved in leptin's adipogenic effects.
• * To clarify the context-dependent nature of leptin's role and identify research gaps.

Main Methods:

• * Comprehensive literature review of studies investigating leptin and adipogenesis.
• * Integration of findings from diverse experimental models (in vitro and in vivo).
• * Analysis of molecular mechanisms and signaling pathways.

Main Results:

• * Leptin exhibits context-dependent effects on adipogenesis, reported as pro-adipogenic, anti-adipogenic, or neutral.
• * Discrepancies are attributed to variations in leptin concentration, exposure timing, cell type, adipose depot, and species.
• * Specific molecular pathways influenced by leptin in adipogenesis are examined.

Conclusions:

• * Leptin's role in adipogenesis is complex and highly dependent on experimental context.
• * Further research is needed to fully elucidate these context-dependent effects.
• * Clarifying leptin's regulatory role is essential for understanding adipose tissue biology and metabolic diseases.