The biological roles and activities of signaling molecules, known as adipokines, which are secreted by adipose tissue, or body fat. These bioactive substances regulate numerous systemic processes including inflammation, energy homeostasis, insulin sensitivity, and vascular function. Clinically, understanding this functionality is crucial because dysregulated adipokine secretion is strongly linked to metabolic syndrome and cardiovascular disease risk.
Origin
The term combines “adipo-“, referring to fat or adipose tissue, and “-kine,” a suffix denoting a signaling molecule or cytokine. Adipose tissue was historically viewed merely as an energy storage depot; however, the discovery of adipokines established its role as a dynamic endocrine organ. This concept emerged from endocrinology and cellular physiology research focused on metabolic regulation.
Mechanism
Adipokines, such as leptin, adiponectin, and resistin, exert their effects by binding to specific receptors on target cells in distant organs like the liver, muscle, and brain. The functional mechanism involves autocrine, paracrine, and endocrine signaling pathways that modulate gene expression and cellular activity. Balanced adipokine signaling maintains metabolic health, while imbalance drives pathological states like insulin resistance and chronic low-grade inflammation.
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