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Previous issue date: 2009-08-10 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The vitamins A and E are recognizably important in the initial stages of life and the newborn depends on nutritional adequacy of breast milk to meet their needs. These vitamins share routes of transport to the tissues and antagonistic effects have been observed in animals after supplementation with vitamin A. This study aimed to verify the effect of maternal supplementation with vitamin A megadose (200,000 UI) in the immediate post-partum on the concentration of alpha-tocopherol in colostrum. Healthy parturient women attended at a public maternity natalensis were recruited for the study and divided into two groups: control (n = 37) and supplemented (n = 36). Blood samples of colostrum and milk were collected until 12 hours after delivery. The women of the supplemented group was administered a retynil palmitate capsule and 24 hours after the first collection was obtained the 2nd sample of colostrum in two groups for analysis of retinol and alpha-tocopherol in milk. The mean retinol concentration of 50,7 ? 14,4 ?g/dL (Mean ? standard deviation) and alpha-tocopherol of 1217.4 ? 959 mg/dL in the serum indicate the nutritional status biochemical appropriate. Supplementation with retynil palmitate resulted in increase not only retinol levels in the colostrum of the supplemented group (p = 0.002), but also the concentration of alpha-tocopherol (p = 0.04), changing from 1456.6 ? 1095.8 mg/dL to 1804.3 ? 1432.0 mg/dL (milk 0 and 24 respectively) compared to values in the control group, 984.6 ? 750.0 mg/dL and 1175.0 ? 730.8 mg/dL. The women had different responses to supplementation, influenced by baseline levels of retinol in colostrum. Those with previous by low levels of retinol in colostrum (<60 mg/dL) had increased the concentration of alpha-tocopherol in milk, whereas those with adequate levels (> 60 mg/dL), showed a reduction after supplementation. Supplementation with retinol palmitate is an important intervention in situations of high risk for vitamin A deficiency, when considering the need to maternal supplementation, since the excess vitamin can offer unfavorable interactions between nutrients essential for the mother-child group / As vitaminas A e E s?o reconhecidamente importantes nos est?gios iniciais de vida, sendo os rec?m-nascidos dependentes da adequa??o nutricional do leite materno para suprir suas necessidades. Estas vitaminas compartilham vias de transporte para os tecidos e poss?veis efeitos antag?nicos t?m sido observados em animais ap?s a suplementa??o com vitamina A. Este trabalho teve como objetivo verificar o efeito da suplementa??o materna com megadose de vitamina A (200.000 UI) no p?s-parto imediato sobre a concentra??o de alfa-tocoferol no colostro. Parturientes saud?veis atendidas em uma maternidade p?blica natalense foram recrutadas para o estudo e divididas em dois grupos: controle (n = 37) e suplementado (n = 36). Amostras de sangue e leite colostro foram coletadas at? 12 horas p?s-parto. Neste momento, nas mulheres do grupo suplementado foi administrada a c?psula de vitamina A. Decorrido 24 horas ap?s a primeira coleta foi obtida a 2? amostra de colostro nos dois grupos para an?lise de retinol e alfa-tocoferol no leite. A concentra??o m?dia de retinol de 50,7 ? 14,4 ?g/dL (Media ? Desvio Padr?o) e de alfa-tocoferol de 1217,4 ? 959 ?g/dL no soro das mulheres indicaram estado nutricional adequado nas vitaminas A e E. A suplementa??o com retinol palmitato resultou em aumento n?o somente na concentra??o do retinol no leite colostro do grupo suplementado (p= 0,002), mas tamb?m na concentra??o do alfa-tocoferol (p = 0,04), alterando de 1456,6 ? 1095,8 ?g/dL para 1804,3 ? 1432,0 ?g/dL (leite 0 e 24 respectivamente) em rela??o aos valores no grupo controle, 984,6 ? 750,0 ?g/dL e 1175,0 ? 730,8 ?g/dL. As parturientes apresentaram diferentes respostas ? suplementa??o, influenciadas pelos n?veis basais de retinol no colostro. Aquelas com n?veis pr?vios baixos de retinol no colostro (< 60 ?g/dL) apresentaram aumento na concentra??o de alfa-tocoferol no leite, enquanto que, as que tinham n?veis adequados (> 60 ?g/dL), apresentaram redu??o ap?s a suplementa??o. A suplementa??o com retinol palmitato ? uma medida importante na preven??o da defici?ncia de vitamina A, por?m somente quando considerada a real necessidade de suplementa??o materna, visto que o excesso de vitamina pode propiciar intera??es desfavor?veis entre nutrientes essenciais para o grupo materno-infantil
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12547 |
| Date | 10 August 2009 |
| Creators | Garcia, L?gia Rejane Siqueira |
| Contributors | CPF:18095640425, http://lattes.cnpq.br/8520928220989866, Dimenstein, Roberto |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Bioqu?mica, UFRN, BR, Bioqu?mica; Biologia Molecular |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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