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Risk factors for sodium valproate-induced renal tubular dysfunction
Satoko Koga1, Takahisa Kimata1, Sohsaku Yamanouchi1
1Department of Pediatrics, Kansai Medical University, 2-5-1 Shin-machi, Hirakata-shi, Osaka, 573 1010, Japan.
Clinical and Experimental Nephrology
|August 25, 2017
Summary
Bedridden patients on sodium valproate (VPA) are at higher risk for renal tubular dysfunction (RTD) due to low carnitine levels. Regular monitoring of urinary beta-2-microglobulin is recommended.
Area of Science:
- Nephrology
- Pharmacology
- Neurology
Background:
- Sodium valproate (VPA) is a widely used antiepileptic drug.
- Renal tubular dysfunction (RTD) is a potential adverse effect of VPA therapy.
- Early identification of risk factors is crucial for preventing VPA-induced kidney damage.
Purpose of the Study:
- To identify risk factors associated with the development of VPA-induced RTD.
- To aid in the early diagnosis and treatment of VPA-related kidney complications.
Main Methods:
- A cohort of 87 epilepsy patients treated with VPA was analyzed.
- Serum and urine samples were collected to measure VPA levels, electrolytes, and biomarkers like urine beta-2-microglobulin (BMG).
- RTD was defined by elevated urine BMG/creatinine levels.
Main Results:
- 17 out of 87 patients developed RTD.
- Patients with RTD were more likely to be bedridden, on tube feeding, and taking multiple anticonvulsants.
- Lower serum levels of free carnitine, uric acid, and phosphorus were significantly associated with RTD, with bedridden status, low free carnitine, and low phosphorus being independent risk factors.
Conclusions:
- Bedridden patients on VPA are susceptible to hypocarnitinemia, increasing RTD risk.
- Regular monitoring of urinary BMG is recommended for all VPA-treated patients.
- Consider measuring serum free carnitine in patients with RTD; carnitine supplementation warrants further investigation.
Keywords:
Fanconi syndromeHypocarnitinemiaRenal proximal tubular dysfunctionSodium valproateβ2-microglobulinMore Related Videos
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