Leptin Regulation and Obesity Mechanisms
Summary
Leptin is a pivotal adipokine that informs the central nervous system of energy stores and modulates appetite, thermogenesis and metabolic homeostasis. Synthesised predominantly by white adipose tissue, leptin secretion is proportional to fat mass and conveys peripheral nutritional status to hypothalamic circuits via the leptin receptor. In healthy individuals, leptin signalling suppresses orexigenic pathways and enhances energy expenditure, maintaining body-weight stability. In obesity, however, chronic hyperleptinaemia and impaired receptor sensitivity give rise to leptin resistance, perpetuating weight gain and metabolic dysfunction. Recent advances have elucidated transcriptional and epigenetic mechanisms governing LEP gene expression, refined quantitative models of leptin-mediated feedback and revealed sex-specific regulatory pathways. These insights underpin novel strategies to restore leptin sensitivity, target epigenetic modulators or optimise lifestyle interventions for the prevention and treatment of obesity worldwide.
Research from Nature Portfolio
Recent studies have applied CRISPR/Cas9 genome editing to produce a leptin receptor knockout rodent model. This model exhibits severe obesity, hyperphagia, insulin resistance, dyslipidaemia and diabetic complications, thereby illuminating the systemic metabolic consequences of receptor loss. Detailed phenotyping has refined understanding of leptin receptor signalling, highlighted interactions with insulin and glucoregulatory pathways, and established a robust in vivo platform for testing therapeutic agents aimed at restoring leptin sensitivity and correcting energy-balance disorders.
Leptin Regulation and Obesity Mechanisms publication trend
The graph below shows the total number of articles in leptin regulation and obesity mechanisms across all publications each year (not limited to Nature Index journals).
Technical terms
Leptin: A peptide hormone secreted by adipocytes that regulates energy balance by signalling nutritional status to the brain.
Adipokine: Bioactive peptides produced by adipose tissue that modulate metabolic, inflammatory and endocrine functions.
Epigenetic regulation: Heritable changes in gene expression driven by DNA modifications or chromatin remodelling rather than alterations in the DNA sequence.
DNA methylation: The addition of methyl groups to cytosine bases in DNA, often leading to transcriptional repression of the associated gene.
Leptin receptor: A cell-surface receptor that binds leptin and activates intracellular signalling cascades important for appetite control and energy expenditure.
References
- Sex-specific role of epigenetic modification of a leptin upstream enhancer in adipose tissue. Clinical Epigenetics (2025).
- Rules for body fat interventions based on an operating point mechanism. iScience (2023).
- New insights into adipocyte-specific leptin gene expression. Adipocyte (2012).
- Preliminary Characterization of a Leptin Receptor Knockout Rat Created by CRISPR/Cas9 System. Scientific Reports (2015).
- DNA Methylation Suppresses Leptin Gene in 3T3-L1 Adipocytes. PLOS ONE (2016).
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