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Renal function in transfusion-dependent pediatric beta-thalassemia major patients
Amir Jalali1, Hamid Khalilian, Ali Ahmadzadeh
1Department of Pharmacology and Toxicology, School of Pharmacy, Toxicology Research Center, Jundishapur University of Medical Sciences, Ahvaz, Iran. amjalali@hotmail.com
Hematology (Amsterdam, Netherlands)
|July 16, 2011
Summary
Kidney dysfunction in thalassemia major patients worsens with age and blood transfusions. N-acetylglucosaminidase (NAG) is a sensitive marker for detecting renal dysfunction in these patients.
Area of Science:
- Nephrology
- Pediatrics
- Hematology
Background:
- Thalassemia major patients often experience kidney complications due to iron overload from frequent blood transfusions.
- Assessing glomerular and tubular function is crucial for managing these patients.
Purpose of the Study:
- To investigate the relationship between kidney function markers (creatinine, GFR, urine NAG) and patient characteristics in thalassemia major.
- To evaluate the utility of N-acetylglucosaminidase (NAG) as a sensitive marker for renal dysfunction.
Main Methods:
- A case-control study involving 280 thalassemia major patients aged 7-16 years.
- Measurements included fractional excretion of sodium and potassium, calcium-to-creatinine and uric acid-to-creatinine ratios, and serum ferritin.
- Urine N-acetylglucosaminidase (NAG) activity was assessed and correlated with other parameters.
Main Results:
- Glomerular filtration rate (GFR) showed a non-significant decrease with age.
- Serum ferritin levels correlated significantly with increased NAG activity (P<0.001).
- Hypercalciuria was significantly more prevalent in patients with elevated NAG activity.
Conclusions:
- Kidney dysfunction in thalassemia major is associated with increasing age, transfusion duration, and hypercalciuria.
- Urine NAG is a sensitive and specific test for detecting renal dysfunction in thalassemic patients.
- Early detection using NAG can help prevent progression to severe renal complications.
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