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The role of vitamin E therapy in high-risk neonates
1University of Rochester School of Medicine and Dentistry, New York.
Insights
Tocopherol supplementation prevents vitamin E deficiency in infants. While benefits for premature infants are still studied, it shows promise in reducing intraventricular hemorrhage (IVH).
Area of Science:
- Biochemistry
- Neonatology
- Nutritional Science
Background:
- Infants are born with limited tocopherol (vitamin E) stores.
- Prolonged malabsorption leads to vitamin E deficiency, causing hemolytic anemia and spinocerebellar degeneration.
- Tocopherol supplementation is crucial for preventing these conditions.
Purpose of the Study:
- To evaluate the benefits of tocopherol supplementation in premature infants, particularly concerning oxygen toxicity syndromes.
- To investigate the potential of tocopherol in reducing the incidence and severity of periventricular/intraventricular hemorrhage (PV/IVH).
- To establish reliable methods for assessing tocopherol sufficiency and toxicity in premature infants.
Main Methods:
- Review of existing literature on tocopherol metabolism and deficiency in infants.
- Analysis of studies investigating pharmacologic doses of tocopherol in premature infants.
- Exploration of methods to assess oxidative stress as an indicator of tocopherol status.
Main Results:
- Tocopherol supplementation effectively prevents vitamin E deficiency in infants.
- A potential benefit of tocopherol in reducing the incidence and severity of intraventricular hemorrhage (IVH) in premature infants is suggested.
- Measures of tissue oxidative stress capacity show promise for assessing tocopherol status.
Conclusions:
- Tocopherol plays a vital role in infant nutrition and preventing deficiency-related disorders.
- Further pharmacologic studies are needed to confirm tocopherol's benefits in premature infants, especially for IVH prevention.
- Monitoring oxidative stress markers may aid in safe and effective tocopherol administration to premature infants.
Abstract:
Infants are born with low tissue stores of tocopherol and accumulate this vitamin from feedings after birth. If prolonged malabsorption of tocopherol occurs, a recognized hemolytic anemia and spinocerebellar degeneration develops after a period of months to years. This is preventable with tocopherol supplementation. However, a benefit of tocopherol supplementation in premature infants who are transiently unable to feed after birth has been harder to prove. Pharmacologic doses have not definitively been shown to be beneficial in any of the putative oxygen toxicity syndromes, with the possible exception of PV/IVH. It is exciting that tocopherol appears to reduce significantly the incidence and severity of IVH, and this potential application underscores the urgent need for pharmacologic studies of this lipid nutrient. In order to administer the drug safely, we must establish the best means of assessing sufficiency and toxicity in premature infants. Measures of tissue capacity to resist oxidative stress appear to be the most promising of these tests at this time. In the interim, a working proposition is to provide sufficient tocopherol to these infants to raise the plasma levels into the range considered normal for term, breastfed infants.