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Serum carnitine concentrations in different glomerular diseases with normal renal function

T Asami1, T Yanagihara, S Tomisawa

  • 1Department of Pediatrics, School of Medicine, Niigata University, Japan.

Nihon Jinzo Gakkai Shi
|May 1, 1996
PubMed
Summary

Serum carnitine levels in children with glomerular diseases were similar to controls. However, the ratio of serum-free carnitine to serum-total carnitine increased, potentially indicating early changes in carnitine metabolism.

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Area of Science:

  • Nephrology
  • Biochemistry
  • Pediatric Medicine

Background:

  • Serum carnitine levels are altered in chronic kidney disease, decreasing with hemodialysis and increasing in renal failure.
  • Limited data exists on serum carnitine in pediatric glomerular diseases before significant renal function decline.

Purpose of the Study:

  • To investigate serum carnitine concentrations in pediatric patients with various glomerular diseases.
  • To determine if glomerular disease type impacts serum carnitine levels in patients with preserved renal function.

Main Methods:

  • Measured serum-free carnitine concentration (S-FCC) and serum-total carnitine concentration (S-TCC) in 40 pediatric patients.
  • Included patients with idiopathic nephrotic syndrome, IgA nephropathy, non-IgA glomerulonephritis, and focal segmental glomerulosclerosis.

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  • Compared carnitine levels and their ratio against normal pediatric controls.

    • Main Results:

    • No significant differences in S-FCC or S-TCC were observed between glomerular disease groups and controls.
    • Weak correlations were found between S-TCC, S-FCC, and Blood Urea Nitrogen (BUN) despite normal renal function.
    • The ratio of S-FCC to S-TCC was significantly higher in patients compared to controls.

    Conclusions:

    • Glomerular lesion type does not significantly affect serum carnitine concentrations in pediatric patients with preserved renal function.
    • Serum carnitine levels appear primarily influenced by the kidney's excretory capacity for urea nitrogen, even in early stages of kidney disease.
    • An elevated S-FCC/S-TCC ratio may serve as an early indicator of altered serum carnitine profiles in these patients.