Organic anion transporter family: current knowledge

Area of Science:

• Biochemistry
• Pharmacology
• Physiology

Background:

• Organic anion transporters (OATs) are vital for clearing endogenous and exogenous organic anions.
• Renal OATs are critical for the excretion of many clinically relevant drugs and their metabolites.
• Molecular cloning has identified several families of multispecific transporters, including the OAT family.

Purpose of the Study:

• To review current knowledge and recent advancements regarding OAT family members.
• To discuss the expression patterns and functions of OAT isoforms.
• To highlight the involvement of OATs in renal secretion, reabsorption, drug distribution, drug-drug interactions, and toxicity.

Main Methods:

• Literature review of existing research on OAT family transporters.
• Analysis of molecular cloning data identifying OAT isoforms.
• Synthesis of information on OAT expression and function in various organs.

Main Results:

• The OAT family comprises six isoforms (OAT1-4, URAT1, and rodent Oat5), primarily expressed in the kidney.
• OATs are involved in the renal secretory and reabsorptive pathways for organic anions.
• OATs play significant roles in the body's distribution of organic anions, drug-drug interactions, and the toxicity of anionic substances.

Conclusions:

• OAT family transporters are key players in the physiological and pharmacological processes involving organic anions.
• Understanding OAT function is crucial for comprehending drug disposition, efficacy, and toxicity.
• Further research into OATs will advance our knowledge of renal transport and drug development.