Retinol activity pathway

The **retinol activity pathway** refers to the complex network of metabolic and transcriptional events regulating the conversion of vitamin A (retinol) through sequential enzymatic reactions into its active derivatives, such as retinoic acid. Retinol is absorbed, transported (often by retinol-binding protein and the receptor STRA6), and metabolized by families of enzymes including retinol dehydrogenases (RDHs), retinaldehyde dehydrogenases (RALDH), and cytochrome P450 enzymes (CYP26 for degradation)[1][2][4][6]. Retinoic acid, the key active metabolite, acts primarily as a ligand for nuclear receptors—retinoic acid receptors (RARs) and retinoid X receptors (RXRs)—which regulate the transcription of genes involved in vision, development, immune function, cell growth, reproduction, and skin homeostasis[3][4][6][7]. Dysregulation of this pathway is implicated in various diseases, including vitamin A deficiency, congenital disorders, skin diseases, and several cancers. **Summary**: "Retinol activity pathway" is not a discrete molecular target, but a pathway encompassing many targets (enzymes, binding proteins, receptors). For structured drug/target data, use specific targets within this pathway, such as "Retinoic acid receptor alpha" or "Retinol dehydrogenase 10."

Other names

Retinol metabolismVitamin A metabolic pathwayRetinoid signaling pathwayRetinoic acid pathway

Agonism of nuclear retinoic acid receptors (RAR, RXR); Modulation of gene transcription; Regulation of cell differentiation and proliferation; Inhibition of sebaceous gland function (for skin drugs); Induction of apoptosis in tumor cells