Made available in DSpace on 2014-12-17T14:03:45Z (GMT). No. of bitstreams: 1 KarlaDaniellySR.pdf: 900491 bytes, checksum: ce62aac9f93fd9e572c68946520395b2 (MD5) Previous issue date: 2007-06-12 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The mothers supplementation of vitamin A in the postpartum comes being a measure of intervention sufficiently used in the combat to the vitamin deficiency. The objective of this work was to evaluate the effect of the mother megadose of vitamin A under the levels of retinol in colostrum of postpartum mothers receiving care at the Janu?rio Cicco Maternity School (MEJC), Natal, RN, as well as analyzing the influence of the maternal nutritional status in the reply to this supplementation. The study it was transversal type, with participation of 91 women in labor divided in group had participated of the study have controlled (44 women) and supplemented group (47 women). In the period of the morning blood and milk had been collected (milk 0h). After that a capsule of retinil palmitate of (200 000 UI or 60 mg) was supplied to the supplemented group. Another aliquot of colostro was after gotten 24h of the first collection (milk 24h). Retinol in milk and serum was quantified through the High Pressure Liquid Chromatography. The vitamin ingestion was evaluated by the questionnaire of frequency of alimentary consumption. The levels of serum retinol were 40.6 ? 10.6 and 35.9 ? 10.9 ?g/dL in the groups controlled and supplemented, respectively. The women had presented a satisfactory average ingestion of vitamin (1492,4 ?gRAE/dia), however with high prevalence of inadequate consumption (23%). Average values of retinol in milk 0h had been found and 24h of 93.5 ? 50.3 ?g/dL and 99.1 ? 49.3 ?g/dL has the group controlled group, respectively (p>0.05). After the supplementation had a significant increase in the levels of retinol of the supplemented group, being found values of 102.0 ? 56.0 ?g/dL and 196.1 ? 74.0 ?g/dL for milk 0h and 24h, respectively (p<0.0001). The women in labor presented different answers to the supplementation influenced for the basal levels of retinol in colostrum. It was possible to verify that women with deficient levels of retinol in milk had transferred more retinol to milk 24h than ones with adjusted levels, showing a percentage of reply equivalent to 326.1% and 86.5% of increase, respectively (p< 0.0001). Although the apparent normality found in the serum, the studied women are considered of risk to the development of the vitamin deficiency, and megadose was efficient in first 24h after the supplementation and wakes up with the mechanisms considered for transference of vitamin A to the milk / A suplementa??o materna de vitamina A no p?s-parto ? utilizada como medida de interven??o no combate ? defici?ncia de vitamina A. O objetivo deste trabalho foi avaliar o efeito da megadose de vitamina A sobre os n?veis de retinol no colostro de pu?rperas da Maternidade Escola Janu?rio Cicco (MEJC),Natal-RN, assim como analisar a influ?ncia do estado nutricional materno na resposta a esta suplementa??o. O estudo foi do tipo transversal, com participa??o de 91 parturientes divididas em grupo controle (44 mulheres) e grupo suplementado (47 mulheres). No per?odo da manh? foram coletados sangue e leite (leite 0h). Em seguida uma c?psula de palmitato de retinil (200 000 UI ou 60 mg) foi fornecida ?s parturientes do grupo suplementado. Outra al?quota de colostro foi obtida ap?s 24h da primeira coleta (leite 24h). O retinol no leite e soro foi quantificado utilizando a Cromatografia L?quida de Alta Efici?ncia. A ingest?o de vitamina A foi avaliada pelo question?rio de freq??ncia de consumo alimentar. Os n?veis de retinol s?rico nos grupos controle e suplementado foram 35,9 ? 10,6 e 40,6 ? 10,9 ?g/dL, respectivamente. As mulheres apresentaram uma satisfat?ria ingest?o m?dia de vitamina A (1492,4 ?gRAE/dia), por?m com alta preval?ncia de consumo inadequado (23%). Foram encontrados valores m?dios de retinol no leite 0 e 24h do grupo controle de 99,1 ? 49,3 ?g/dL e 93,5 ? 50,3 ?g/dL (p>0,05) respectivamente. Ap?s a suplementa??o houve um aumento significativo nos n?veis de retinol do grupo suplementado, sendo encontrado valores de 102,0 ? 56,0 ?g/dL e 196,1 ? 74,0 ?g/dL (p<0,0001) para leite de 0 h e 24 h, respectivamente. As parturientes apresentaram diferentes respostas ? megadose. Mulheres com n?veis deficientes de retinol no leite transferiram mais retinol ao leite 24h do que as com n?veis adequados, encontrando um percentual de resposta equivalente a 326,1% e 86,5% de aumento, respectivamente (p< 0,0001). Apesar da aparente normalidade encontrada no soro, as lactantes s?o consideradas de risco ao desenvolvimento da defici?ncia de vitamina A, e a megadose foi eficaz nas primeiras 24h ap?s a suplementa??o e est? de acordo com os mecanismos propostos para transfer?ncia da vitamina A ao leite

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-12-04T19:34:33Z No. of bitstreams: 1 RaniereFagundesDeMeloSilveira_TESE.pdf: 3512000 bytes, checksum: 19fe99baef9b0082648ee82a63fbf577 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2015-12-09T23:17:35Z (GMT) No. of bitstreams: 1 RaniereFagundesDeMeloSilveira_TESE.pdf: 3512000 bytes, checksum: 19fe99baef9b0082648ee82a63fbf577 (MD5) / Made available in DSpace on 2015-12-09T23:17:35Z (GMT). No. of bitstreams: 1 RaniereFagundesDeMeloSilveira_TESE.pdf: 3512000 bytes, checksum: 19fe99baef9b0082648ee82a63fbf577 (MD5) Previous issue date: 2014-10-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / A prospec??o de polissacar?deos farmacologicamente ativos provenientes de subprodutos agr?colas ainda ? uma pr?tica pouco explorada no meio cient?fico. Dessa forma, este trabalho pretendeu ampliar o conhecimento relacionado ?s atividades farmacol?gicas de polissacar?deos extra?dos do sabugo de milho. A partir da farinha de sabugo de milho, um extrato polissacar?dico foi obtido ao combinar ondas de ultrassom em meio alcalino, e ao final do processo o produto foi denominado de EPSM. Esse extrato foi caracterizado fisico-quimicamente e, atrav?s de ensaios in vitro, foi avaliado como agente antioxidante, citot?xico, anticoagulante e imunomodulator. Os resultados indicaram que o EPSM apresentou significativa a??o quelante de metal, al?m de n?o apresentar efeito t?xico para c?lulas de linhagem normal, mas evidenciar efeito citot?xico contra as c?lulas tumorais HeLa, quando causou a morte celular por apoptose. Em adi??o, outros efeitos farmacol?gicos foram observados, o EPSM diminuiu a produ??o de ?xido n?trico (NO) por macr?fagos ativados, e estendeu o tempo de coagula??o sangu?nea quando avaliado pelo ensaio de APTT. Posteriormente, fra??es metan?licas, etan?licas e cet?nicas foram obtidas a partir do fracionamento dos polissacar?deos presentes no EPSM. Foram obtidas cinco fra??es metan?licas, seis fra??es etan?licas e duas cet?nicas; e todas avaliadas quanto ?s atividades antioxidante, citot?xica, anticoagulante e imunomodulat?ria. Dentre as fra??es, E1.4 exibiu significativo efeito qualante de metal, a??o t?xica em c?lulas HeLa por indu??o da apoptose, reduziu a produ??o de NO por macr?fagos ativados, e ampliou o tempo de coagula??o sangu?nea. Esses resultados sinalizaram que os polissacar?deos farmacologicamente ativos do EPSM estariam presentes na fra??o E1.4. A partir do fracionamento da E1.4 foram obtidas seis subfra??es polissacar?dicas com tamanhos distintos: -3; 3-10; 10-30; 30-50; 50-100 e +100 KDa. Cerca de 80% dos polissacar?deos de E1.4 apresentou tamanho inferior a 10 KDa, e todas as subfra??es apresentaram mais de 61% de a??car em suas composi??es qu?micas. Essas subfra??es exibiram diferentes composi??es monossacar?dicas, mas todas apresentaram xilose. As subfra??es evidenciaram distintos efeitos nos ensaios farmacol?gicos in vitro. As subfra??es de menor tamanho (< 30 KDa) demonstraram maior atividade quelante de metal e maior atividade citot?xica contra c?lulas tumorais. As intermedi?rias (entre 30 e 100 KDa) diminu?ram mais a produ??o de NO por macr?fagos ativados, mas a de maior tamanho (+100 KDa) modulou um maior n?mero de citocinas inflamat?rias, e demonstrou um maior efeito anticoagulante. Portanto, a an?lise conjunta dos resultados indica que os polissacar?deos farmacologicamente ativos do ESPM s?o heteroxilanas e foram concentrados nas subfra??es de E1.4, al?m disso, os efeitos farmacol?gicos dessas heteroxilanas dependem do seu tamanho molecular. / Prospecting pharmacological active polysaccharides from agricultural byproducts, such as corncobs, is an underexplored practice in the scientific community. Thus, this work aims to expand knowledge about pharmacological activities of polysaccharides extracted from corncobs. From corn cob flour a extract was obtained by ultrasound waves in an alkaline medium, and the end of the process the product was termed PECC (polysaccharidic extract from corncobs). This extract was physicochemical characterized and evaluated by in vitro assays as an antioxidant, cytotoxic, anticoagulant and imunomodulator agent. Results indicated significant activity metal chelating by PECC, and the use of PECC in cell culture cells showed no toxic effects to normal cell lines, but toxic action against HeLa tumor cells due promoting cell death by apoptosis. In addition, other pharmacological effects were observed, the PECC decreased nitric oxide (NO) production by activated macrophages, and prolonged blood clotting time through APTT assay. Then methanolic, ethanolic and ketone fractions were obtained from fractionation of PECC polysaccharides. Five methanolic fractions, six ethanolic fractions and two ketones were obtained; and all fractions were evaluated for antioxidant, cytotoxic, anticoagulant, immunomodulatory activities. E1.4 fraction exhibited significant metal chelating effect, a toxic action to induce apoptosis in HeLa cells, decreased NO production by activated macrophages, and extended blood clotting time. These results showed that the PECC pharmacological active polysaccharides would be present in the fraction E1.4. From fractionation of E1.4 polysaccharide six subfractions with different sizes were obtained: <3; 3-10; 10-30; 30-50; 50-100 and >100 KDa. About 80% of E1.4 polysaccharides had lower size to 10 KDa, and all the subfractions showed over 61% sugar in their chemical compositions. These subfractions exhibited different monosaccharide compositions, but xylose was presented in all of them. The subfractions exhibited distinct pharmacological effects in in vitro assays. Smaller subfractions (<30 KDa) had highest metal chelating activity and greater toxic action in tumor cells. The intermediate fractions (between 30-100 KDa) decreased more NO production of activated macrophages, for other side, the larger size (>100 KDa) modulated a greater number of inflammatory cytokines, and the had greatest anticoagulant effect. Therefore, when analyzing all the results together it is evident that the PECC pharmacological polysaccharides are heteroxylans, and were concentrated in E1.4 fraction, and heteroxilanas pharmacological effects depends on their molecular size. Thus, corncobs could be used as source from molecules with biotechnology potential

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-12-15T17:45:11Z No. of bitstreams: 1 HenriqueCesarDeJesusFerreira_DISSERT.pdf: 3079036 bytes, checksum: 669ef1f5f7345e06f0db2159cfbc3fcd (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2015-12-29T20:46:40Z (GMT) No. of bitstreams: 1 HenriqueCesarDeJesusFerreira_DISSERT.pdf: 3079036 bytes, checksum: 669ef1f5f7345e06f0db2159cfbc3fcd (MD5) / Made available in DSpace on 2015-12-29T20:46:40Z (GMT). No. of bitstreams: 1 HenriqueCesarDeJesusFerreira_DISSERT.pdf: 3079036 bytes, checksum: 669ef1f5f7345e06f0db2159cfbc3fcd (MD5) Previous issue date: 2014-09-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Muitas esp?cies se especializaram em viver nos mais variados ambientes existentes demonstrando a not?vel capacidade de adapta??o do mundo microbiano as mais diversas condi??es f?sico-qu?micas. Ambientes expostos ? radia??o natural e a metais s?o escassos ao redor do mundo, apresentando uma microbiota ainda desconhecida. Com um n?mero total estimado entre 4 e 6 x 1030 microrganismos na terra, estes constituem um enorme pool biol?gico e gen?tico a ser explorado. Abordagens metagen?micas, independentes de cultivo, proporcionam uma nova forma de acesso ao potencial gen?mico de amostras ambientais tornando-se uma importante ferramenta para elucida??o de fun??es ecol?gicas, bem como para identifica??o de novas esp?cies e biomol?culas. Neste trabalho, o material gen?tico ambiental de amostras de solo e ?gua do A?ude Boqueir?o de Parelhas-RN, sob influ?ncia de radia??o natural e da presen?a de metais, foi extra?do, pirosequenciado, e as sequ?ncias geradas foram analisadas atrav?s de programas de bioinform?tica (MG-RAST e STAMP). Perfis taxon?micos comparativos de ambas as amostras mostraram alta abund?ncia do Dom?nio Bacteria, seguida por uma pequena parcela atribu?da aos Dom?nios Eucaryota, Archaea e V?rus. Proteobacteria, Actinobacteria e Bacterioidetes foram os filos que mostraram maior domin?ncia em ambas as amostras. Importantes g?neros e esp?cies associados ? resist?ncia aos agentes estressores encontrados na regi?o foram observados. Sequ?ncias relacionadas ? replica??o e reparo do DNA, ao estresse oxidativo e estresse pelo calor e a resist?ncia a compostos t?xicos foram observadas, mostrando uma importante rela??o entre a microbiota e seu perfil metab?lico, influenciada pelas vari?veis ambientais regionais. Os resultados encontrados neste estudo adicionam valiosos e in?ditos dados sobre a composi??o de comunidades microbianas nestas regi?es. / Many species have specialized to live in the most varied existing environments showing the remarkable adaptability of the microbial world the most diverse physicochemical conditions. Environments exposed to natural radiation and metals are scarce around the world, presenting a microbiota still unknown. With a total number estimated between 4 and 6 x 1030 microrganisms on earth, they constitute an enormous biological and genetic pool to be explored. Metagenomic approach independent of cultivation, provides a new form to access to the potential genomic environmental samples becoming a powerful tool for the elucidation of ecological functions, metabolic profiles, as well as to identify new biomolecules. In this context, the genetic material of environmental soil and water samples from A?ude Boqueirao Parelhas-RN, under the influence of natural radiation and the presence of metals, was extracted, pirosequencing and the generated sequences were analyzed by bioinformatics programs (MG-RAST and STAMP). Taxonomic comparative profiles of both samples showed high abundance of Domain Bacteria, followed by a small portion attributable to Eucaryota Domains, Archaea and Viruses. Proteobacteria, Actinobacteria and Bacterioidetes phyla showed the greater dominance in both samples. Important genera and species associated with resistance to various stressors found in region were observed. Sequences related to oxidative and heat stress, DNA replication and repair, and resistance to toxic compounds were observed, suggesting a significant relationship between the microbiota and their metabolic profile, influenced by regional environmental variables. The results of this study add valuable and unpublished data on the composition of microbial communities in these regions

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-12-15T17:45:12Z No. of bitstreams: 1 SinaraCarlaDaSilvaAraujo_DISSERT.pdf: 1885448 bytes, checksum: b4a8226a4f1778e4f626da3394657f9a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2015-12-29T20:51:37Z (GMT) No. of bitstreams: 1 SinaraCarlaDaSilvaAraujo_DISSERT.pdf: 1885448 bytes, checksum: b4a8226a4f1778e4f626da3394657f9a (MD5) / Made available in DSpace on 2015-12-29T20:51:37Z (GMT). No. of bitstreams: 1 SinaraCarlaDaSilvaAraujo_DISSERT.pdf: 1885448 bytes, checksum: b4a8226a4f1778e4f626da3394657f9a (MD5) Previous issue date: 2014-08-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Os microrganismos apresentam uma imensa diversidade gen?tica e est?o presentes em toda biosfera, no entanto cerca de 1% das esp?cies pode ser cultivada por t?cnicas laboratoriais padr?o. A metagen?mica tornou poss?vel o acesso direto ao genoma microbiano derivado de amostras ambientais, utilizando t?cnicas independentes de cultivo. A metodologia permite obter informa??o funcional de prote?nas, assim como a identifica??o de potenciais produtos com interesse biotecnol?gico e de novos recursos biol?gicos industrialmente explor?veis, a exemplo novas solu??es para impactos ambientais. ?reas contaminadas com petr?leo s?o caracterizadas por um grande ac?mulo de hidrocarbonetos e surfactantes s?o utilizados para sua biorremedia??o. Sendo assim, a abordagem metagen?nima foi utilizada para selecionar genes envolvidos no processo de degrada??o e biossurfacta??o de hidrocarbonetos. Em um trabalho anterior, o DNA ambiental (eDNA) foi extra?do de amostras de solo coletadas em duas diferentes ?reas (Caatinga e rio salino) do Rio Grande do Norte (Brasil), as bibliotecas metagen?micas foram constru?das e analisadas funcionalmente. Os clones capazes de degradar o ?leo foram avaliados quanto ? capacidade de sintetizar biossurfactante. O clone foi sequenciado e an?lise da sequencia revelou uma ORF com 897 pb, 298 amino?cidos e prote?na de peso molecular pr?ximo a 34 kDa. A busca por homologia no GenBank revelou similaridade com a sequ?ncia que codifica uma prote?na hipot?tica de representantes da fam?lia Halobacteriaceae, que foram mostradas recentemente como produtoras de biossurfactantes. A presen?a da sequ?ncia codificante inserida e do fen?tipo adquirido foram confirmadas. Primers foram desenhados e suas ORFs amplificadas por PCR. Em seguida, foram subclonadas em vetor de express?o pETDuet-1, contendo uma cauda de histidina, para express?o e posterior purifica??o da prote?na de interesse. Os testes foram realizados para confirma??o da atividade de biossurfactante e degrada??o de hidrocarbonetos e apresentaram resultados positivos. O ensaio de imunodetec??o (western blot) com a utiliza??o do anticorpo monoclonal Anti-His? confirmou a presen?a da prote?na ambiental. Esse estudo foi o primeiro a relatar uma poss?vel prote?na com atividade biossurfactante obtida a partir de uma abordagem metagen?mica. / The microorganisms have a vast genetic diversity and they are present throughout the biosphere, however, only about 1% of the species can be cultivated by traditional cultivation techniques. Within this diversity there is a huge pool genetic and biological being explored. The metagenomics has enabled direct access to microbial genome derived from environmental samples using independent methods of cultivation. The methodology enables to obtain functional information about the proteins, as well as identify potential products with biotechnological interest and new industrially exploitable biological resources, such as new solutions to environmental impacts. Oil-contaminated areas are characterized by a large accumulation of hydrocarbons and surfactants may be used for bioremediation. Thus, the metagenomic approach was used in this study in order to select genes involved in the degradation and hydrocarbon emulsification. In a previous work, the environmental DNA (eDNA) was extracted from soil samples collected from two different areas (Caatinga and Saline River) of Rio Grande do Norte (Brazil), the metagenomic libraries were constructed and functionally analyzed. The clone able to degrade the oil was evaluated for the ability to synthesize biosurfactants. The sequence analysis revealed an ORF with 897 bp, 298 amino acids and a protein with around 34 kDa. The search for homology in GenBank revealed sequence similarity with a hypothetical protein of representatives Halobacteriaceae family, who were recently shown as strains producing biosurfactants. The presence of the inserted coding sequence and the acquired phenotype was confirmed. Primers were designed and the ORF amplified by PCR. The ORF was subcloned into pETDuet-1 expression vector for subsequent purification of the protein of interest containing a histidine tail. The tests performed to confirm the biosurfactant activity and the ability of hydrocarbon degradation showed positive results. The immunodetection test (western blot) using the monoclonal AntiHis? confirmed the presence of the environmental protein. This study was the first to report a possible protein with biosurfactant activity obtained from a metagenomic approach

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-04T22:02:35Z No. of bitstreams: 1 LeonardoCapistranoFerreira_TESE.pdf: 3396619 bytes, checksum: bffb880b6907328ac1ce5051faaf28fd (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-07T21:08:47Z (GMT) No. of bitstreams: 1 LeonardoCapistranoFerreira_TESE.pdf: 3396619 bytes, checksum: bffb880b6907328ac1ce5051faaf28fd (MD5) / Made available in DSpace on 2016-01-07T21:08:47Z (GMT). No. of bitstreams: 1 LeonardoCapistranoFerreira_TESE.pdf: 3396619 bytes, checksum: bffb880b6907328ac1ce5051faaf28fd (MD5) Previous issue date: 2014-10-06 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / O desenvolvimento de doen?as complexas, como a pr?-ecl?mpsia, ? determinado por fatores ambientais e gen?ticos, al?m da poss?vel intera??o entre esses fatores. As doen?as hipertensivas da gravidez (DHGs) apresentam um amplo espectro cl?nico, que pode variar desde pr?-ecl?mpsia leve (hipertens?o e proteinuria) at? formas mais graves, como a ecl?mpsia (convuls?es) e s?ndrome HELLP (hem?lise, eleva??o das enzimas hep?ticas e plaquetopenia). O espectro cl?nico parece estar ligado a diferentes mecanismos patol?gicos. Este trabalho tem como objetivo identificar fatores (gen?ticos e ambientais) envolvidos no desenvolvimento das DHGs. Usando uma abordagem caso-controle, selecionamos um total de 1498 mulheres para os estudos epidemiol?gico e gen?tico, abrangendo 755 gr?vidas normotensas (controle); 518 pr?-ecl?mpsia; 84 eclampsia e 141 HELLP. As mulheres foram genotipados para 18 marcadores distribu?dos em cinco genes candidatos (FLT1, ACVR2A, ERAP1, ERAP2 e LNPEP). Como resultado das an?lises dos fatores ambientais, encontramos idade materna, paridade e o ?ndice de massa corporal pr?-gestacional como importantes fatores de risco associados ?s DHGs. As an?lises gen?ticas mostraram que os genes est?o associados de maneira fen?tipo-espec?fica: ACVR2A com pr?-ecl?mpsia precoce (rs1424954, p=0,002); FLT1 com s?ndrome HELLP (rs9513095, p=0,003), e ERAP1 com ecl?mpsia (rs30187, p=0,03). Nossos resultados sugerem que diferentes mecanismos gen?ticos, juntamente com fatores ambientais espec?ficos, contribuem na determina??o do espectro cl?nico das DHGs. Al?m disso, o refinamento fenot?pico parece ser um passo essencial na busca por genes de doen?as complexas / The development of complex diseases such as preeclampsia are determined by both environmental and genetic factors, but there is also interaction among these factors. Preeclampsia is a pregnancy-specific disorder characterized by de-novo hypertension and proteinuria after 20th week of gestation. There is a broad spectrum of clinical presentations related to hypertensive disorders of pregnancy (HDP) that can range from mild preeclampsia to eclampsia (seizures) or HELLP syndrome (Hemolysis, Elevation of Liver enzymes, Low Platelets). Those clinical outcomes might be linked to different pathological mechanisms. Our work aims to identify factors (i.e. genes and environmental) associated with the HDP?s clinical spectrum. Using a case-control approach, we selected a total of 1498 pregnant women for epidemiological and genetic studies, encompassing 755 normotensive (control); 518 preeclampsia; 84 eclampsia; and 141 HELLP. Women were genotyped for 18 SNPs across 5 candidate genes (FLT1, ACVR2A, ERAP1, ERAP2 and LNPEP). For the environmental factors, we found maternal age, parity status and pre-gestational body mass index as important risk factors associated with disease. Genes were associated in a phenotype-specific manner: ACVR2A with early preeclampsia (rs1424954, p=0.002); FLT1 with HELLP syndrome (rs9513095, p=0.003); and ERAP1 with eclampsia (rs30187, p=0.03). Our results suggest that different genetic mechanisms along with specific environmental factors might determine the clinical spectrum of HDP. In addition, phenotype refinement seems to be an essential step in the search for complex disease genes

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-13T13:01:42Z No. of bitstreams: 1 JoannaGardelValverdeGalvao_TESE.pdf: 4813874 bytes, checksum: 794cef0c5d96742ddc842b9b54b284cc (MD5) / Approved for entry into archive by Elisangela Moura (lilaalves@gmail.com) on 2016-01-15T15:01:19Z (GMT) No. of bitstreams: 1 JoannaGardelValverdeGalvao_TESE.pdf: 4813874 bytes, checksum: 794cef0c5d96742ddc842b9b54b284cc (MD5) / Made available in DSpace on 2016-01-15T15:01:19Z (GMT). No. of bitstreams: 1 JoannaGardelValverdeGalvao_TESE.pdf: 4813874 bytes, checksum: 794cef0c5d96742ddc842b9b54b284cc (MD5) Previous issue date: 2014-10-10 / A leishmaniose visceral (LV) ? end?mica no Brasil, sendo a regi?o nordeste a que apresenta maior incid?ncia, apesar de nos ?ltimos 30 anos ter aumentado o n?mero de casos em outras regi?es do pa?s. A LV na Am?rica Latina ? resultante da infec??o por Leishmania infantum. No entanto, nem todas as pessoas infectadas desenvolvem doen?a; na verdade, a maioria apresenta resolu??o espont?nea da infec??o sem sintomas caracter?sticos de LV. Tradicionalmente a avalia??o do perfil imunol?gico tem sido realizada utilizando a reestimula??o de c?lulas mononucleares de sangue perif?rico em cultura. Esses estudos revelaram que pacientes com LV apresentavam inibi??o tanto da prolifera??o linfocit?ria quanto da resposta pr?-inflamat?ria anti-Leishmania. O presente trabalho teve por objetivo avaliar a resposta imune na LV sintom?tica, na cura p?s-tratamento e assintom?tica. Para isso, analisamos caracter?sticas imunofenot?picas relacionadas ? ativa??o, Treg e mem?ria de linf?citos, por citometria de fluxo, assim como a produ??o de citocinas ex vivo ou em cultura de sangue total. Para os volunt?rios com LV, foi realizado um estudo longitudinal com reavalia??o imunol?gicas aos 4 e 14 meses ap?s a cura cl?nica. O grupo controle incluiu pessoas provenientes de regi?o end?mica, sendo dividido em 2 grupos: Controle Positivo, formado por pessoas que apresentaram sorologia e?ou PCR anti-Leishmania positivos e Controle Negativo formado por pessoas com sorologia e PCR anti-Leishmania negativos. Durante a LV os linf?citos CD4 apresentam um maior perfil de ativa??o e mem?ria, al?m de serem maiores produtores de citocinas em cultura, quando comparado aos linf?citos CD8, contudo essa ativa??o n?o ? Leishmania espec?fica, visto que ocorreu tanto em aus?ncia (CD4+CD25+:10,60%, CD8+CD25+:5,36%; p<0,0001) quanto em presen?a de ant?genos sol?veis de Leishmania (SLA), (CD4+CD25+: 10,20%, CD8+CD25+:3,28%; p=0,0003). H? ativa??o de linf?citos durante a LV (CD4+CD69+: 4,9%), quando comparado aos grupos Controle Positivo (CD4+CD69+: 1,96% p=0,0045) e Negativo (CD4+CD69+: 1,35% p=0,0062), mas esta ativa??o tamb?m n?o ? Leishmania espec?fica. O perfil de ativa??o linfocit?ria permanece elevado mesmo 14 meses ap?s o fim do tratamento, por?m ap?s a cura a ativa??o ? Leishmania espec?fica (CD4+CD25+ em aus?ncia de SLA: 8,44%, presen?a de SLA: 10,70% p=0,0279). Linf?citos CD8+CD25+ foram capazes de produzir IFN-? em presen?a de ant?geno tanto em Controles Positivos (aus?ncia de SLA: 5,17%, presen?a de SLA: 9,52% p=0,0391) como em LV curados (Curado 4 meses: aus?ncia de SLA: 3,90%, presen?a SLA: 10,70% p=0,0098). C?lulas presentes no sangue total de pessoas com LV ativa s?o capazes de produzir IFN-? em resposta ao SLA (IFN-? em aus?ncia de SLA: 3,61 pg?mL e em presen?a de SLA: 44,26 pg?mL; p=0,0020), assim como LV recuperado (IFN-? em aus?ncia de SLA: 2,29 pg?mL e presen?a de SLA: 139,80 pg?mL; p=0,0005). Contudo o elevado n?vel de IL-10 parece estar inibindo a atividade pro-inflamat?ria de IFN-? e TNF-? em pacientes na fase sintom?tica. Contrariamente as demais citocinas pro-inflamat?rias, a cultura de sangue total do grupo LV ativa n?o apresentou produ??o de IL-2 Leishmania espec?fica (em aus?ncia de SLA: 2,42 pg?mL e em presen?a de SLA: 2,56 pg?mL). Com base nesses dados n?s conclu?mos que a restaura??o da ativa??o de linf?citos e a diminui??o da produ??o de IL-10, Leishmania espec?fica, est?o relacionados ? um perfil imunol?gico protetor. / Visceral Leishmaniasis (VL) is endemic in Brazil and the northeast region had the highest incidence of the disease , despite, in the last 30 years, it has spread to all geographic regions of the country. Leishmania infantum is the m ain etiological agent of VL in Latin America, Europe and North Africa. However, not all infected individuals develop the disease; in fact, the majority present spontaneous re solution of infection without symptoms. The evaluation of the immunological profil e has been mostly conducted stimulating, with Leishmania spp. antigen, peripheral blood mononuclear cells isolated from subjects with VL. These studies showed that VL patients had an inhibition of both, lymphocyte proliferation and proinflammatory response to Leishmania spp. antigen. Our study aimed to evaluate the immune response in active LV, cured post treatment and asymptomatic infection. To reach this aim, we analyzed immunophenotypic features related to activation, Treg and memory lymphocytes, by flow cytometry, as well as, evaluation of cytokine production, in ex vivo or in whole blood culture. In active VL volunteers, a longitu dinal study was conducted with reassessment at 4 and 14 months after clinical cure. The control group included individuals th at live d in endemic region and were either Positive Control, consisting of individuals with positive anti - L eishmania spp. serology and/or positive PCR for Leishmania ? spp. and Negative Control composed by individuals with negative anti - Leishmania antibodie s serology and negative PCR for Leishmania . During VL, CD4 lymphocytes showed greater activation and memory profile s and were the major source of cytokines in culture when compared to CD8 lymphocytes , and these were not Leishmania specific. There were act ivated lymphocytes during VL (CD4 + CD69 + :4.9%) when compared to control groups, Positive (CD4 + CD69 + :1.96%, p=0.0045) and Negative (CD4 + CD69 + :1.35%, p=0.006), on the other hand, this was non - specific activation. The lymphocyte activation profile remain ed el evated even 14 months post treatmen t. A fter clinical cure , the activation was Leishmania specific (CD4 + CD25 + absence of SLA: 8.4%, and presence of SLA: 10.7% p=0.0279). CD8 + CD25 + lymphocytes were able to produce Leishmania specific IFN - ? in both, Positive Controls (absence of SLA 5.2% and presence of SLA: 9.5%, p=0.0391) and Cured 4 month (absence of SLA: 3.9%; presence of SLA: 10.7% p=0.0098). Whole blood culture cells, of VL patients, were able to produce IFN - ?, by SLA stimulation (absence of SLA: 28.0 pg ?mL, and presence: 44.3 pg?mL p=0.0020) as well as recovered groups (absence of SLA 2.3 pg?mL and presence of SLA 139.8 pg?mL, p=0.0005). However, the high level of IL - 10 seem ed to inhibit pro - inflammatory activity of IFN - ? and TNF - ? during symptomatic dis ease . Unlike other pro - inflammatory cytokines, active VL group d id not produce Leishmania specific IL - 2 (absence of SLA 2.4 pg?mL and presence of SLA: 2.6 pg?mL). Based on these data we conclude that the restoration of lymphocyte activation and decreased i n IL - 10 Leishmania specific production were related to a protective immune profile.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-14T20:02:00Z No. of bitstreams: 1 GabrielPereiraFidelis_DISSERT.pdf: 2672661 bytes, checksum: d836949986a9f770a6728a0061945803 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-18T21:39:54Z (GMT) No. of bitstreams: 1 GabrielPereiraFidelis_DISSERT.pdf: 2672661 bytes, checksum: d836949986a9f770a6728a0061945803 (MD5) / Made available in DSpace on 2016-01-18T21:39:54Z (GMT). No. of bitstreams: 1 GabrielPereiraFidelis_DISSERT.pdf: 2672661 bytes, checksum: d836949986a9f770a6728a0061945803 (MD5) Previous issue date: 2014-12-12 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Polissacar?deos sulfatados (PS) da alga vermelha comest?vel Gracilaria birdiae foram obtidos atrav?s de cinco diferentes condi??es de extra??o (GB1: ?gua; GB1p: ?gua/prote?lise; GB1s: ?gua/sonica??o; GB1sp: ?gua/sonica??o/prote?lise; GB2s: NaOH/sonica??o; GB2sp: NaOH/sonica??o/prote?lise). O rendimento em massa seca (g) das extra??es aumentou na seguinte ordem: GB2sp>GB1sp>GB1p>GB2s>GB1s>GB1. A quantidade de PS extra?dos por cada condi??o, em contrapartida, aumentou em sequencia diferente: GB2sp>GB1p>GB1>GB1sp>GB1s>GB2s. Espectroscopia de infravermelho e eletroforese em gel de poliacrilamida em agarose demonstram que todas as condi??es extra?ram o mesmo polissacar?deo sulfatado. Al?m disso, com base nos dados referentes ? composi??o monossacar?dica de cada condi??o de extra??o pode-se pressupor que o uso de sonica??o fez com que se obtivesse outros polissacar?deos al?m dos PS. No teste de tempo de protrombina (PT), o qual avalia a via extr?nseca da cascata de coagula??o, nenhuma das amostras apresentou atividade anticoagulante at? uma concentra??o m?xima de 0,1 mg/mL. Por outro lado, no teste de tempo de tromboplastina parcial ativada (aPTT), cuja via da cascata de coagula??o avaliada ? a intr?nseca, todas os extratos de PS tiveram atividade positiva, com exce??o da condi??o GB2sp. A atividade anticoagulante no teste de aPTT diminuiu na seguinte sequencia: GB1sp>GB2sp>GB1p>GB1>GB1s>GB2s. O teste de capacidade antioxidante total (CAT) dos polissacar?deos sulfatados tamb?m sofreu influ?ncia das varia??es de acordo com condi??o de extra??o, visto que com Gb2s e Gb1 foram obtidos os menores valores de atividade quando comparado ?s demais condi??es de extra??o. No presente trabalho, conclui-se que as condi??es de extra??o de PS influenciam as atividades biol?gicas e na composi??o qu?mica dos PS obtidos e que portanto, o uso de uma condi??o em especial pode favorecer a obten??o de PS com uma atividade que se deseja em detrimento de outras. De acordo com os dados obtidos pode-se afirmar que NaOH/sonica??o/prote?lise foi a melhor condi??o para obter PS com atividade anticoagulante e antioxidante em Gracilaria birdiae / The sulfated polysaccharides (SP) from the edible red seaweed Gracilaria birdiae were obtained using five different condition extraction (GB1: Water; GB1p: Water/proteolysis; GB1s: Water/sonication; GB1sp: Water/sonication/proteolysis; GB2s: NaOH/sonication; GB2sp: NaOH/sonication/proteolysis. The yield (g) increased in the following order GB2sp>GB1sp>GB1p>GB2s>GB1s>GB1. However, the amount of SP extracted increased in different way GB2sp>GB1p>GB1>GB1sp>GB1s>GB2s. Infrared and electrophoresis analysis showed that all conditions extracted the same SP. In addition, monosaccharide composition showed that ultrasound promotes the extraction of other polysaccharides than SP. In the prothrombin time (PT) test, which evaluates the extrinsic coagulation pathway, none of the samples showed anticoagulant activity. While in the activated partial thromboplastin time (aPTT) test, which evaluates the intrinsic coagulation pathway, all samples showed anticoagulant activity, except GB2s. The aPTT activity decreased in the order of GB1sp>GB2sp>GB1p>GB1>GB1s>GB2s. Total capacity antioxidant (TCA) of the SP was also affected by condition extraction, since GB2s and GB1 showed lower activity in comparison to the other conditions. In conclusion, the conditions of SP extraction influence their biological activities and chemical composition. The data showed NaOH/sonication/proteolysis was the best condition to extract anticoagulant and antioxidant SPs from Gracilaria birdiae.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-05T23:00:04Z No. of bitstreams: 1 IsabelAndradeLopesDeSousa_DISSERT.pdf: 1629932 bytes, checksum: 69b762646403d829620b6a8a168e9988 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-16T21:49:50Z (GMT) No. of bitstreams: 1 IsabelAndradeLopesDeSousa_DISSERT.pdf: 1629932 bytes, checksum: 69b762646403d829620b6a8a168e9988 (MD5) / Made available in DSpace on 2016-02-16T21:49:50Z (GMT). No. of bitstreams: 1 IsabelAndradeLopesDeSousa_DISSERT.pdf: 1629932 bytes, checksum: 69b762646403d829620b6a8a168e9988 (MD5) Previous issue date: 2015-02-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / A cana-de-a??car ? uma planta monocotiled?nea cultivada em regi?es tropicais e subtropicais, sendo o Brasil o maior produtor mundial. Apesar de sua import?ncia econ?mica, muito pouco ? conhecido molecularmente sobre o processo de flora??o em cana-de-a??car. Este processo fisiol?gico pode promover uma perda de at? 60% na produtividade de a??car ou bioetanol. Desta forma, este trabalho teve como objetivo caracterizar um gene hom?logo ao gene que codifica a prote?na HINT1, identificado anteriormente em bibliotecas subtrativas de flora??o. An?lises gen?micas da estrutura g?nica e regi?o promotora permitiram observar que existem pelo menos dois genes distintos hom?logos ? HINT em cana-de-a??car. An?lises de bioinform?tica mostraram a conserva??o do dom?nio proteico caracter?stico da superfam?lia HIT e indicam uma rela??o filogen?tica associada ? localiza??o celular. Al?m disso, foi observada uma poss?vel rela??o com as prote?nas da fam?lia SBTILISIN-like por meio das informa??es dispon?veis em interatomas. Isto sugere que o gene HINT de cana-de-a??car pode estar relacionado ao desenvolvimento vegetal, havendo v?rias possibilidades de intera??es para a regula??o do processo de indu??o floral, pois as sequ?ncias presentes nas regi?es regulat?rias indicam que a express?o diferencial de HINT seria relacionada tanto com fatores clim?ticos presentes na regi?o Nordeste do Brasil quanto ? estresse bi?tico e fito-horm?nios. Al?m disso, os fen?tipos relacionados ao florescimento tardio indicam que a influ?ncia de HINT pode ocorrer devido ao ac?mulo de produtos na sua atua??o enzim?tica. Por estas caracter?sticas este gene pode ser utilizado como um marcador na sele??o de novos cultivares. / The sugarcane is a monocot plant grown in tropical and subtropical regions, with Brazil being the largest producer. Despite its economic importance, little is known about the molecular flowering process in sugarcane. This physiological process can promote a loss up to 60% in sugar or bioethanol. Thus, this work had as objective characterize a HINT1 homologous gene previously identified in subtractive libraries of flowering. Genomic analysis of gene and promoter region structure allowed the observation that there are at least two distinct genes homologous to HINT on sugarcane. Bioinformatics analyses showed the conservation of the characteristic protein domain of HIT superfamily and indicate a phylogenetic relationship associated to cell location. Moreover, a possible relation with the SBTILISIN-like protein family through the information available in interatomas was observed. This suggests that the HINT gene of sugarcane can be related to plant development, there are several possibilities of interactions in the regulation of floral induction process, because the sequences present in regulatory regions indicate that differential expression of HINT was related to with climatic factors in the Northeast region of Brazil as well as to biotic stress and phytohormones. Furthermore, the sugarcane phenotypes indicate that the influence of HINT may happen due to product accumulation of its enzymatic activity. For these characteristics this gene can be used as a marker in the selection of new varieties.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-29T22:53:27Z No. of bitstreams: 1 JoaoFirminoRodriguesNeto_TESE.pdf: 2194031 bytes, checksum: fb646e671a736d92f6d4e5cc3cc5acc2 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-02T00:38:57Z (GMT) No. of bitstreams: 1 JoaoFirminoRodriguesNeto_TESE.pdf: 2194031 bytes, checksum: fb646e671a736d92f6d4e5cc3cc5acc2 (MD5) / Made available in DSpace on 2016-03-02T00:38:57Z (GMT). No. of bitstreams: 1 JoaoFirminoRodriguesNeto_TESE.pdf: 2194031 bytes, checksum: fb646e671a736d92f6d4e5cc3cc5acc2 (MD5) Previous issue date: 2015-04-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / A leishmaniose visceral (LV) ? uma doen?a end?mica em muitos pa?ses, incluindo o Brasil. O protozo?rio Leishmania infantum ? o agente etiol?gico da LV, sendo transmitido pela picada das f?meas dos flebotom?neos, durante o repasto sangu?neo. A maioria dos indiv?duos quando expostos ao parasita n?o desenvolvem a doen?a, pois apresentam um predom?nio da resposta celular Th1. Aqueles que desenvolvem doen?a, apresentam sinais como febre, perda de peso, hepatoesplenomegalia e um comprometimento da resposta imune celular, espec?fica a ant?genos de Leishmania. N?s avaliamos se essa anergia, observada durante a doen?a ativa, poderia estar associada com altera??es nas mol?culas coestimulat?rias de linf?citos T ou em seus ligantes em mon?citos CD14+. H? aumento na porcentagem de CTLA-4 em linf?citos T CD4+ (p=0,001) e ICOS em linf?citos T CD4+ e CD8+ (p=0,002 para CD4+ e p=0,003 para CD8+) ap?s est?mulo por ant?geno sol?vel de Leishmania (SLA) na LV sintom?tica, e que h? maior porcentagem dessas mol?culas ex vivo, quando comparados indiv?duos sintom?ticos aos recuperados (p=0,04 para CTLA-4 em CD4+, e p=0,001 para ICOS em CD4+ e p=0,026 para CD8+). Al?m disso, encontramos uma maior express?o dos genes CTLA-4, OX-40 e ICOS, durante a LV ativa. As mol?culas CD40, CD80, CD86, HLA-DR e ICOSL, n?o sofrem altera??o durante a doen?a. H? produ??o de IFN-? por c?lulas de sangue perif?rico, ap?s est?mulo por SLA, em indiv?duos sintom?ticos; no entanto, h? diminui??o na raz?o entre IFN-?/IL-10, com aumento desta ap?s a cura. A observa??o do comprometimento de algumas vias de mol?culas coestimulat?rias poderia diminuir a capacidade microbicida dos fag?citos, durante a leishmaniose visceral sintom?tica, podendo facilitar a sobreviv?ncia e a prolifera??o do parasita. / Visceral leishmaniasis (VL) is endemic in many countries, including Brazil. The protozoan Leishmania infantum, is the etiological agent of VL, and is transmitted by the bite of female sandflies during the blood meal. The majority of subjects when exposed to the parasite do not develop the disease, because of development of Th1 cellular responses. Those who have develop signs of VL such as fever, weight loss, hepatosplenomegaly, have impairment of the cellular immune response, specific to the Leishmania antigens. We evaluated whether the specififc anergy during symptomatic VL, may be associated with changes in T cells costimulatory molecules or their ligands in CD14+ monocytes. There is an increase in CTLA-4 porcentage on CD4+ T lymphocytes (p=0.001) and ICOS on CD4+ and CD8+ T cells (p=0.002 to CD4+ and p=0.003 to CD8+), after stimulation by soluble Leishmania antigen (SLA) during active visceral leishmaniasis, and that there is a higher percentage of these molecules ex vivo, when comparing symptomatic to recovered individuals (p=0.04 to CTLA-4 in CD4+, and p=0.001 to ICOS in CD4+ and p=0.026 to CD8+). Moreover, we found a high gene expression of CTLA-4, OX-40 and ICOS during active VL. CD40, CD80, CD86, HLA-DR and ICOSL molecules do not suffer changes during disease. There is IFN-? production by the peripheral blood cells, after SLA stimulation, by peripheral blood cells in symptomatic subjects; however, there is a decrease of the ratio IFN-?/IL-10, which is reversed after clinical recovery. The impairment of some costimulatory molecules pathways during symptomatic VL could inhibit the ability of phagocytes to kill Leishmania and could facilitate their survival and the proliferation inside macrophages.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-10T20:24:53Z No. of bitstreams: 1 JeaneFrancoPires_DISSERT.pdf: 1066232 bytes, checksum: d9e738b192a2350bed992f266b418f52 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-17T00:02:56Z (GMT) No. of bitstreams: 1 JeaneFrancoPires_DISSERT.pdf: 1066232 bytes, checksum: d9e738b192a2350bed992f266b418f52 (MD5) / Made available in DSpace on 2016-03-17T00:02:56Z (GMT). No. of bitstreams: 1 JeaneFrancoPires_DISSERT.pdf: 1066232 bytes, checksum: d9e738b192a2350bed992f266b418f52 (MD5) Previous issue date: 2015-05-05 / O termo vitamina E refere-se a um grupo de oito compostos moleculares que diferem em estrutura e biodisponibilidade, sendo o RRR-alfa-tocoferol a forma mais ativa biologicamente. A composi??o de vitamina E no leite materno sofre varia??es ao longo da lacta??o, sendo o leite colostro mais rico neste micronutriente quando comparado ao leite de transi??o e maduro. Os rec?m-nascidos, especialmente os prematuros s?o mais suscept?veis a defici?ncia de vitamina E e para prevenir os danos causados por esta defici?ncia tem sido proposta a suplementa??o do neonato com este micronutriente, por?m, n?o existe consenso para realiza??o desta interven??o. Assim, a suplementa??o materna com RRR-alfa-tocoferol no p?s-parto pode ser uma boa alternativa para tentar elevar os n?veis de alfa-tocoferol no leite materno e, consequentemente, fornecer ao rec?m-nascido prematuro quantidades adequadas de vitamina E. Este estudo objetivou avaliar o efeito da suplementa??o com 400 UI de acetato de RRR-alfa-tocoferol em mulheres com partos prematuros, sobre a concentra??o de alfa-tocoferol no leite materno colostro, transi??o e maduro. Participaram do estudo 89 pu?rperas adultas saud?veis, que foram distribu?das no grupo controle (n = 51) e grupo suplementado (n = 38). Foram coletadas amostras de sangue e leite colostro logo ap?s o parto (leite 0h), vinte e quatro horas ap?s, nova al?quota de leite colostro foi coletado (leite 24h). O leite de transi??o e maduro foram coletados em sete dias (leite 7d) e trinta dias (leite 30d) ap?s o parto, respectivamente. A suplementa??o no grupo suplementado foi realizada ap?s a coleta de sangue e leite 0h. As an?lises de alfa-tocoferol foram realizadas por cromatografia l?quida de alta efici?ncia. Valores s?ricos de alfa-tocoferol menores que 516 ?g/dL foram considerados indicativos de defici?ncia nutricional. A concentra??o m?dia de alfa-tocoferol no soro das parturientes do grupo controle foi 1159,8 ? 292,4 ?g/dL e do grupo suplementado foi 1128,3 ? 407,2 ?g/dL (p = 0,281). Todas as pu?rperas apresentaram estado nutricional em vitamina E adequado. Em ambos os grupos, foi poss?vel observar que a concentra??o de vitamina E no leite colostro foi maior em rela??o ao leite de transi??o e maduro. No grupo suplementado, a concentra??o de alfa-tocoferol no leite 24h aumentou em 60% ap?s a suplementa??o, passando de 1339,3 ? 414,2 ?g/dL (leite 0h) para 2234,7 ? 997,3 ?g/dL (leite 24h). Enquanto que o grupo controle os valores no colostro 0h e colostro 24h foram semelhantes (p = 0,681). No leite de transi??o do grupo controle o valor de alfa-tocoferol foi 875,3 ? 292,4 ?g/dL e no grupo suplementado 1352,8 ? 542,3 ?g/dL, com aumento de 35% no grupo suplementado em rela??o ao controle (p < 0,001). No leite maduro as concentra??es de alfa-tocoferol entre o grupo controle (426,6 ? 187,5 ?g/dL) e suplementado (416,4 ? 214,2 ?g/dL) foram semelhantes (p = 0,853). Apenas o leite 24h do grupo suplementado atendeu o requerimento nutricional de alfa-tocoferol (4 mg/dia) do rec?m-nascido. Tais resultados evidenciam que o transporte deste micronutriente para o leite ocorre de maneira controlada e limitada. Dessa forma, a suplementa??o materna com vitamina E eleva a concentra??o de alfa-tocoferol no leite colostro e de transi??o e n?o influencia a concentra??o no leite maduro. Apenas o aumento no leite colostro foi suficiente para atingir o requerimento nutricional do rec?m-nascido prematuro. / The term vitamin E refers to a group of eight molecular compounds which differ in structure and bioavailability, and the RRR-alpha-tocopherol more biologically active form. The composition of vitamin E in breast milk undergoes variations during lactation, colostrum and milk richer in this micronutrient compared to transitional and mature milk. Newborns, especially premature infants are more susceptible to vitamin E deficiency and to prevent the damage caused by this deficiency has been proposed supplementation of neonates with this micronutrient, however, there is no consensus to carry out this intervention. Thus, maternal supplementation with RRRalpha-tocopherol in the postpartum period can be a good alternative to try to raise the alpha-tocopherol levels in breast milk and therefore provide the premature newborn adequate amounts of vitamin E. This study to evaluate the effect of supplementation with 400 UI acetate RRR-alpha-tocopherol in women with premature births, on the concentration of alpha-tocopherol in breast milk colostrum, transitional and mature. The study included 89 healthy adult women were enrolled in the control group (n = 51) and supplemented group (n = 38). Blood samples were collected and milk colostrum soon after birth (0h milk) twenty-four hours, new rate of colostrum milk was collected (24h milk). The transitional and mature milk were collected in seven days (7d milk) and thirty days (30d milk) after delivery, respectively. Supplementation in the supplemented group was held after the collection of blood and 0h milk. The alpha-tocopherol analyzes were performed by high-performance liquid chromatography. Serum levels of alpha-tocopherol less than 516 ?g/dL were considered indicative of nutritional deficiency. The average concentration of alphatocopherol in the serum of the control group mothers was 1159.8 ? 292.4 ?g/dL and the supplemented group was 1128.3 ? 407.2 ?g/dL (p = 0.281). All women had nutritional status in vitamin E suitable. In both groups, it was observed that the concentration of vitamin E in colostrum milk was higher compared to transitional and mature milk. In the supplemented group, the concentration of alpha-tocopherol in the milk increased 60 % after supplementation, from 1339.3 ? 414.2 ?g/dL (0h milk) to 2234.7 ? 997.3 ?g/dL (24h milk). While the control group values in colostrum 0h and colostrum 24h were similar (p = 0.681). In the control group the follow-on milk alphatocopherol value was 875.3 ? 292.4 ?g/dL and in the group supplemented 1352.8 ? 542.3 ?g/dL, an increase of 35% in the supplemented group compared to control (p <0.001). In mature milk alpha-tocopherol concentrations between the control group (426.6 ? 187.5 ?g/dL) and supplemented (416.4 ? 214.2 ?g/dL) were similar (p = 0.853). Only 24h milk supplemented group answered the nutritional requirement of alpha-tocopherol (4 mg/day) of the newborn. These results show that the transport of this micronutrient for milk occurs in a controlled and limited way. Thus, the native vitamin E supplementation increases the concentration of alpha-tocopherol in colostrum and milk and transition does not influence the concentration in mature milk. Only the increase in colostrum milk was sufficient to meet the nutritional requirement of premature newborns.