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- W2108339079 abstract "Abstract Background Biotin plays an important role as a covalently bound coenzyme for carboxylases. Carnitine is essential in β‐oxidation to transport long‐chain fatty acids across the inner mitochondrial membrane. The present study was conducted to assess the risk of biotin and carnitine deficiencies in preterm infants who received enteral feeding with maternal milk and/or standard infant formula made in J apan. Methods Forty‐six infants were enrolled in the study. Urine and serum samples and dried blood spots were collected at 1 week and 1 month of age. Additionally, samples were collected at 40 and 44 weeks post‐menstrual age ( PMA ) in preterm infants. Free carnitine and C5‐OH acylcarnitine, which consist of 3‐hydroxyisovalerylcarnitine as a major isomer, were measured in serum samples and dried blood spots using tandem mass spectrometry. Urine 3‐hydroxyisovaleric acid (3‐ HIVA ) was measured using gas chromatography/mass spectrometry. Results The free carnitine levels in preterm infants were significantly lower than those in term infants, but increased with PMA in serum samples and dried blood spots. C5‐OH acylcarnitine and urinary 3‐ HIVA levels, which were very low in term infants, were increased with PMA in preterm infants. Conclusion The present results may indicate chronic biotin deficiency in preterm infants fed maternal milk and/or standard infant formula. Analyses of carnitine profiles of dried blood spots and urine 3‐ HIVA are relatively non‐invasive and useful for the early detection of biotin deficiency in preterm infants." @default.
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- W2108339079 date "2013-06-01" @default.
- W2108339079 modified "2023-10-16" @default.
- W2108339079 title "Biotin and carnitine profiles in preterm infants in Japan" @default.
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- W2108339079 doi "https://doi.org/10.1111/ped.12053" @default.
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