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Vitamina E no soro e colostro humanos em condições de jejum e pós-prandial / Vitamin E in human serum and colostrum under fasting and postprandial conditions
Dimenstein, Roberto; Medeiros, Ana C. P; Cunha, Lahyana R. F; Araújo, Katherine F; Dantas, Juliana C. O; Macedo, Thamizy M. S; Stamford, Tânia L. M.
  • Dimenstein, Roberto; s.af
  • Medeiros, Ana C. P; s.af
  • Cunha, Lahyana R. F; s.af
  • Araújo, Katherine F; s.af
  • Dantas, Juliana C. O; s.af
  • Macedo, Thamizy M. S; s.af
  • Stamford, Tânia L. M; s.af
J. pediatr. (Rio J.) ; 86(4): 345-348, jul.-ago. 2010. tab
Article in Portuguese | LILACS | ID: lil-558827
RESUMO

OBJETIVO:

Avaliar a concentração de alfa-tocoferol no soro e colostro maternos, seja em condições de jejum ou pós-prandial.

MÉTODOS:

Trinta parturientes saudáveis atendidas em uma maternidade pública foram recrutadas para o estudo, e amostras de sangue, colostro em jejum e colostro pós-prandial foram coletadas até 12 horas pós-parto.

RESULTADOS:

A concentração sérica de alfa-tocoferol foi de 1.939,8±766,0 μg/dL. O alfa-tocoferol no colostro em jejum, 1.603,4±911,0 μg/dL, e após a refeição, 1.515,0±890,9 μg/dL, não apresentaram diferença significativa (p > 0,05). Houve correlação entre o alfa-tocoferol do colostro na condição de jejum e no pós-prandial (p < 0,05), mas não entre o soro e o colostro.

CONCLUSÃO:

A falta de correlação entre o alfa-tocoferol no plasma e no colostro e a correlação entre o alfa-tocoferol no colostro em jejum e no pós-prandial reforçam a hipótese de um mecanismo de controle na passagem desse micronutriente, independente do aporte dietético.
ABSTRACT

OBJECTIVE:

To evaluate alpha-tocopherol concentrations in maternal serum and colostrum under fasting and postprandial conditions.

METHODS:

Thirty healthy childbearing women were recruited in a public maternity hospital, and samples of blood, fasting colostrum, and postprandial colostrum were collected from them up to 12 hours after delivery.

RESULTS:

The serum alpha-tocopherol concentration was 1,939.8±766.0 μg/dL. Alpha-tocopherol levels in fasting colostrum (1,603.4±911.0 μg/dL) and in postprandial colostrum (1,515.0±890.9 μg/dL) did not demonstrate a statistically significant difference (p > 0.05). There was correlation between alpha-tocopherol levels in fasting and postprandial colostrum (p < 0.05), but not between serum and colostrum.

CONCLUSION:

The lack of correlation between alpha-tocopherol levels in plasma and in colostrum, and the correlation between alpha-tocopherol concentrations in fasting and postprandial colostrum support the existence of a mechanism that controls the transfer of this nutrient, regardless of dietary intake.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Fasting / Colostrum / Postprandial Period / Alpha-Tocopherol Type of study: Observational study / Prevalence study / Risk factors Limits: Female / Humans / Pregnancy Language: Portuguese Journal: J. pediatr. (Rio J.) Journal subject: Pediatrics Year: 2010 Type: Article / Project document

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Full text: Available Index: LILACS (Americas) Main subject: Fasting / Colostrum / Postprandial Period / Alpha-Tocopherol Type of study: Observational study / Prevalence study / Risk factors Limits: Female / Humans / Pregnancy Language: Portuguese Journal: J. pediatr. (Rio J.) Journal subject: Pediatrics Year: 2010 Type: Article / Project document