Prostaglandin transport

Research output: Contribution to journalArticle

152 Scopus citations

Abstract

Newly synthesized prostaglandins (PGs) efflux from cells by simple diffusion, driven by pH and the membrane potential. Metabolic clearance requires energy-dependent uptake across the plasma membrane, followed by cytoplasmic oxidation. Several PG carriers have been cloned and characterized. PGT is broadly expressed in cyclooxygenase (COX)-positive cells, appears to be a lactate/PG exchanger, and is coordinately regulated with COX. By analogy with neurotransmitter release and re-uptake, PGT may regulate pericellular PG levels via re-uptake. PGT may also direct PGs towards and/or away from specific sets of PG receptors. Other members of the OATP transporter family also catalyze PG uptake; these are variably expressed and have variable affinities for PGs. The OATs are α-ketoglutarate/organic anion exchangers that accept PGs; these probably represent the uptake step in renal and hepatic PG degradation and excretion. Finally, certain glutathione-conjugated leukotrienes and PGs are actively extruded from cells by the MRPs; these may also play a role in metabolic clearance of PGs.

Original languageEnglish (US)
Pages (from-to)633-647
Number of pages15
JournalProstaglandins and Other Lipid Mediators
Volume68-69
DOIs
StatePublished - Aug 2002

Keywords

  • Biological transport
  • Carrier proteins
  • Eicosanoids
  • Molecular cloning

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Pharmacology
  • Cell Biology

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