Related Experiment Videos
[Urate transporter and renal hypouricemia].
Atsushi Enomoto1, Thosimitsu Niwa, Yoshikatsu Kanai
1Nagoya University Hospital, Department of Clinical Preventive Medicine, Nagoya 466-8560.
Rinsho Byori. the Japanese Journal of Clinical Pathology
|October 17, 2003
Summary
Researchers identified the kidney urate transporter (URAT1) responsible for blood urate levels. Defects in this transporter cause hypouricemia, offering new targets for gout and cardiovascular disease treatments.
Area of Science:
- Biochemistry
- Nephrology
- Genetics
Context:
- Urate, a purine metabolite, contributes to hyperuricemia (gout), a cardiovascular disease risk factor.
- High blood urate levels in humans result from efficient renal reabsorption and lost hepatic uricase.
- Urate acts as a scavenger of reactive oxygen radicals implicated in various diseases.
Purpose:
- To identify the urate transporter in the human kidney.
- To investigate the role of this transporter in regulating blood urate levels.
- To explore the connection between transporter defects and hypouricemia.
Summary:
- The study identified the urate transporter in the human kidney, URAT1 (encoded by SLC22A12).
- URAT1 functions as a urate anion exchanger, critically regulating blood urate concentrations.
- Mutational defects in SLC22A12 were demonstrated in patients with renal hypouricemia.
Impact:
- This discovery provides a molecular target for developing uricosuric and antiuricosuric agents.
- Understanding URAT1's function is crucial for managing hyperuricemia, gout, and associated cardiovascular risks.
- Identifying SLC22A12 mutations in hypouricemia offers insights into renal urate transport mechanisms.