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Hypouricemia in acquired immunodeficiency syndrome
J K Maesaka1, A J Cusano, H L Thies
1Department of Medicine, Long Island Jewish Medical Center, New Hyde Park, NY 11042.
Summary
Hypouricemia, a common disorder in acquired immunodeficiency syndrome (AIDS) patients, is linked to impaired kidney function and increased mortality. This condition affects females and intravenous drug users more frequently.
Area of Science:
- Nephrology
- Infectious Diseases
- Immunology
Background:
- Hypouricemia is a frequent complication in patients with acquired immunodeficiency syndrome (AIDS).
- It is often associated with defective renal handling of uric acid.
Purpose of the Study:
- To determine the incidence, significance, and causes of hypouricemia in patients with AIDS and AIDS-related complex (ARC).
- To investigate the relationship between hypouricemia and opportunistic infections, neurological complications, and mortality in this population.
Main Methods:
- Prospective study of renal urate handling in 23 patients.
- Retrospective review of 73 consecutive patients with AIDS/ARC.
- Renal clearance studies, central venous pressure (CVP) monitoring, and daily urine urate measurements were performed.
- Cranial computed tomography (CT) scans were analyzed for cerebral atrophy.
Main Results:
- Hypouricemia (serum urate ≤ 0.18 mmol/L) was found in 21.9% of 96 patients.
- It was more prevalent in females and intravenous drug abusers.
- Associated with increased opportunistic illnesses (MAI, CMV), cerebral atrophy, and significantly higher mortality (71.4% vs. 38.7%).
- Elevated fractional excretion of uric acid (FEua) was observed, particularly in patients with low CVP.
Conclusions:
- Hypouricemia is a significant clinical finding in AIDS/ARC patients, indicating impaired renal urate excretion.
- It is associated with severe opportunistic infections, neurological damage, and poorer prognosis.
- Further research into the mechanisms and management of hypouricemia in AIDS is warranted.