Research
Hormonal
Leptin has direct peripheral actions on immune cells, pancreatic beta cells, adipocytes, and skeletal muscle, influencing processes like fatty acid metabolism and insulin sensitivity.
Leptin doesn't just affect your brain; it directly influences how your muscles burn fat and how your pancreas handles insulin. This highlights the systemic nature of metabolic regulation.
GoodSupportsHIGH confidence
These include roles of leptin to directly regulate immune cells, pancreatic beta cells, adipocytes, and muscle cells. Recent elucidation of a new signaling pathway in skeletal muscle affecting fatty acid metabolism has implications for regulation of insulin sensitivity and glucose metabolism.
Why this rating
Supported by in vitro and ex vivo studies, though in vivo confirmation in all tissues is less robust than CNS data.
Source
Leptin Signaling in the Central Nervous System and the Periphery
Christian Bjørbæk · Recent Progress in Hormone Research · 2004
DOI 10.1210/rp.59.1.305
narrative_reviewCited 554×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Central nervous system leptin signaling regulates energy balance and body weight primarily through the JAK-STAT3 pathway acting on hypothalamic neurons, specifically by activating pro-opiomelanocortin (POMC) neurons and inhibiting neuropeptide Y (NPY)/agouti-related protein (AgRP) neurons.Strong
- Leptin resistance in obesity is mechanistically linked to the overexpression of negative regulators of leptin signaling, specifically SOCS-3 and PTP1B, in the hypothalamus.Good
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