Prolactin secretion pathway

The **"Prolactin secretion pathway"** refers to the complex biological process by which **prolactin**, a polypeptide hormone produced by lactotroph cells in the anterior pituitary gland, is synthesized and released into circulation. This process involves multiple regulatory signals including hypothalamic hormones such as dopamine (which inhibits), thyrotropin-releasing hormone (which stimulates), and estrogen. Once secreted, prolactin acts primarily through binding to its specific membrane-bound **prolactin receptors**, which belong to the type I cytokine receptor family. The main signal transduction mechanisms involve activation of Janus kinase 2 (JAK2) and subsequent phosphorylation of STAT5 transcription factors; alternative pathways include MAP kinase cascades. The biological effects mediated by this system include stimulation of lactation, reproductive functions, immune modulation, cell proliferation in certain tissues, and homeostatic regulation. However, it is important to note that "**Prolactin secretion pathway**" does not refer to an individual molecular target such as an enzyme or receptor; rather it describes an entire physiological process involving many molecules. Therefore: > There is something incorrect with using "Prolactin secretion pathway" as a druggable therapeutic target name—it is too broad and non-specific for structured pharmacological targeting purposes. For structured data extraction regarding drug targets or receptors involved in this system—such as "Prolactin," "Prolactin receptor," or upstream regulators like dopamine D2 receptors—those should be specified individually for accurate mapping.

Other names

Prolactin signaling pathwayPRL secretion pathwayPRL signaling cascade