Primary Hyperoxaluria Type 3 Can Also Result in Kidney Failure: A Case Report

Area of Science:

• Nephrology
• Genetics
• Metabolic Disorders

Background:

• Primary hyperoxaluria (PH) encompasses genetic disorders characterized by excessive hepatic oxalate production.
• PH type 3 (PH3) arises from mutations in the HOGA1 gene, impacting mitochondrial function.
• Kidney failure is a rare but severe complication reported in PH3 patients.

Observation:

• A young man with a history of urinary issues and stones presented with kidney failure at age 33.
• He had hyperoxaluria and low urinary citrate, initially treated with supplements.
• Chronic kidney disease progressed, necessitating hemodialysis, with genetic testing confirming PH3 due to a HOGA1 mutation.

Findings:

• This case highlights a third instance of kidney failure in PH3.
• The patient's presentation underscores the potential severity of HOGA1 mutations.
• Delayed diagnosis contributed to disease progression.

Implications:

• Prompt genetic testing for PH types is recommended for children with urinary stones and hyperoxaluria.
• Standard care includes hyperhydration and citrate, with novel therapies like RNA interference agents under investigation.
• Understanding HOGA1 mutations is key for managing PH3 and preventing kidney failure.