Elevated uric acid levels, mortality and cognitive impairment in children with severe malaria

Area of Science:

• Infectious Diseases
• Nephrology
• Pediatrics
• Metabolic Disorders

Background:

• Severe malaria (SM) poses a significant threat to child survival and neurodevelopment.
• The role of uric acid in the pathogenesis of SM and its clinical implications remains incompletely understood.

Purpose of the Study:

• To investigate the association between uric acid levels and clinical outcomes in children with severe malaria.
• To identify the drivers of hyperuricemia in SM and its relationship with disease complications.

Main Methods:

• Analysis of two independent cohorts of children diagnosed with severe malaria.
• Measurement of blood uric acid levels and assessment of clinical outcomes, including mortality and cognitive function.
• Investigation of potential causes of hyperuricemia, such as hemolysis and renal function, and association with SM complications.

Main Results:

• Hyperuricemia (uric acid ≥ 7 mg/dL) was observed in 25% of children with SM.
• Hyperuricemia was significantly associated with increased in-hospital and postdischarge mortality in both cohorts.
• Elevated uric acid levels correlated with poorer cognitive scores in children under 5 years old and were linked to multiple SM complications, including acute kidney injury, acidosis, and coma.
• Hemolysis and impaired renal excretion were identified as primary drivers of hyperuricemia in SM.
• Increased abundance of Gram-negative uricase-producing bacteria (Escherichia, Shigella) in stool was noted in association with hyperuricemia.

Conclusions:

• Hyperuricemia is a significant risk factor for mortality and neurodevelopmental impairment in children with severe malaria.
• Hemolysis and impaired renal excretion contribute to hyperuricemia in SM.
• Further clinical trials are warranted to evaluate uric acid-lowering therapies as an adjunctive treatment to improve survival and neurodevelopmental outcomes in children with severe malaria.