Why in News?
The expiration of key patents (like semaglutide), India is set to produce low-cost generic weight-loss injections, making adipose-targeted therapies widely accessible by March 20, 2026.
About
- AHA Scientific Sessions (March 17–20, 2026): New research presented in Boston linked central obesity (belly fat) more strongly to heart failure risk than overall BMI, even in individuals with a "normal" weight.
- Endocrine Breakthroughs: Scientists have officially highlighted that fat is a "factory" for pro- and anti-inflammatory chemicals, acting as an endocrine organ that influences everything from appetite to insulin sensitivity.
- Epigenetic "Memory": Recent studies suggest fat cells retain a "memory" of obesity through epigenetic markers, explaining why maintaining weight loss is biologically challenging.
Primary Types
- White Adipose Tissue (WAT): The most abundant type; stores energy as triglycerides and provides insulation and cushioning.
- Brown Adipose Tissue (BAT): Specialized for thermogenesis (burning energy to generate heat); rich in mitochondria and mainly found in newborns and specific areas in adults.
- Beige Fat: "Brown-like" fat that emerges within white fat depots in response to cold or hormonal signals, a process known as "browning".
Endocrine Functions
- Leptin: A hormone that signals satiety to the brain to reduce appetite.
- Adiponectin: An anti-inflammatory hormone that enhances insulin sensitivity and regulates blood sugar.
- Cytokines: Dysfunctional fat secretes pro-inflammatory chemicals that can drive heart failure and metabolic syndrome.
Location Matters
- Subcutaneous Fat: Stored just under the skin; generally considered more metabolically "neutral".
- Visceral Fat: Stored deep in the abdominal cavity around organs; highly active and dangerous, as it drains directly into the portal vein and triggers systemic inflammation.
Health Implications
- Metabolic Syndrome: Excess or dysfunctional fat leads to insulin resistance, type 2 diabetes, and cardiovascular diseases.
- Regenerative Potential: Modern research views adipose tissue as a source of mesenchymal stem cells (ADMSCs) with significant potential for tissue repair and regenerative medicine.
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