The influence of vitamin B-6 on cystathioninuria in premature infants
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Vitamin B-6 (pyridoxine) supplementation reduced urinary cystathionine in premature infants. This suggests vitamin B-6 may enhance cystathionase activity in these infants.
Area of Science:
- Biochemistry
- Neonatal Nutrition
- Pediatric Metabolism
Background:
- Premature infants often exhibit altered metabolic pathways.
- Cystathionine is a metabolite in the methionine pathway.
- Vitamin B-6 (pyridoxine) is a crucial cofactor in amino acid metabolism.
Purpose of the Study:
- To investigate the effect of vitamin B-6 on cystathionine excretion in premature infants.
- To explore the potential role of pyridoxine in modulating cystathionase activity in neonates.
Main Methods:
- Oral administration of 40 mg vitamin B-6 daily to premature infants aged 10-17 days.
- Measurement of urinary cystathionine levels before and after supplementation.
Main Results:
- A significant decrease in urinary cystathionine was observed after daily vitamin B-6 administration.
- The reduction in cystathionine suggests altered metabolic processing.
Conclusions:
- Oral vitamin B-6 supplementation may reduce cystathionine excretion in premature infants.
- Pyridoxine might induce or activate endogenous cystathionase in premature infants, impacting methionine metabolism.
Abstract:
The amount of cystathionine excreted in the urine of premature infants, ages 10 to 17 days, decreases after oral administration of 40 mg vitamin B-6 daily. Thus, it can be speculated that in vivo cystathionase of premature infants may be induced or activated by pyridoxine.