Dehydroepiandrosterone sulfate (DHEAS): identification of a carrier protein in human liver and brain.
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Kullak-Ublick GA, Fisch T, Oswald M, Hagenbuch B, Meier PJ, Beuers U, Paumgartner G
Dehydroepiandrosterone sulfate (DHEAS): identification of a carrier protein in human liver and brain.
FEBS Lett. 1998 Mar 13;424(3):173-6.
- PubMed ID
- 9539145 [ View in PubMed]
- Abstract
Dehydroepiandrosterone sulfate (DHEAS) is the major circulating steroid in man. Pharmacologically, it exerts marked neuropsychiatric effects. Since no target receptor has been identified, we investigated whether the organic anion transporting polypeptide (OATP), a multispecific steroid carrier, transports DHEAS. Expression of the human liver OATP in Xenopus laevis oocytes resulted in high-affinity, partially Na+-dependent uptake of [3H]DHEAS (Km: 6.6 micromol/l). DHEAS transport was inhibited by bromosulfophthalein, bile acids, sulfated estrogens and dexamethasone. Northern blot analysis showed widespread expression of OATP in human brain. These data identify OATP as the first known target protein of DHEAS in human liver and brain.
DrugBank Data that Cites this Article
- Drug Transporters
Drug Transporter Kind Organism Pharmacological Action Actions Conjugated estrogens Solute carrier organic anion transporter family member 1A2 Protein Humans UnknownSubstrateInhibitorDetails Dexamethasone Solute carrier organic anion transporter family member 1A2 Protein Humans UnknownInhibitorDetails Dexamethasone acetate Solute carrier organic anion transporter family member 1A2 Protein Humans UnknownInhibitorDetails