Doença falciforme e o efeito modulador da vitamina D em crianças: uma revisão integrativa / Sickle cell disease and the modulating effect of vitamin D in children: an integrative review

INTRODUÇÃO: A deficiência de Vitamina D (VD) é frequente na doença falciforme (DF) em decorrência do status inflamatório crônico, danos renais, endoteliais, hiperhemólise e melanodermia. Atualmente, a suplementação desse nutriente em falcêmicos tem se mostrado importante devido sua ação sistêmica e imunológica. OBJETIVOS: Analisar o impacto da VD em crianças com DF. MÉTODOS: Trata-se de uma revisão integrativa da literatura, onde foram analisados estudos, publicados originalmente em inglês e português, dos últimos dez anos, em humanos, tendo como referência as bases de dados MEDLINE, SciELO e LILACS. A busca foi efetuada mediante a consulta ao MeSH. Os descritores utilizados foram: "children"; "vitamin D"; "sickle cell anemia"; "supplementation". Foram identificados 32 artigos a partir da frase de pesquisa. Ao aplicar os critérios de inclusão, nove artigos foram eleitos para o estudo. RESULTADOS: A partir da análise dos artigos incluídos, 6 avaliaram a prevalência da deficiência de VD em crianças com anemia falciforme e os outros três artigos relataram sobre a suplementação de VD em crianças também com anemia falciforme. Todos os estudos mostraram que as crianças tratadas com reposição de VD tiveram uma diminuição de idas ao pronto-socorro e maior estabilidade hemodinâmica durante os tratamentos. CONCLUSÃO: Outros ensaios clínicos randomizados devem ser realizados para identificar o papel da DV na qualidade de vida e na redução da morbidade falciforme. A contribuição deste artigo é reconhecer que há evidências sobre a vitamina D fora dos ensaios clínicos randomizados.

INTRODUCTION: Vitamin D (VD) deficiency is frequent in sickle cell disease (SCD) due to chronic inflammatory status, kidney and endothelial damage, hyperhemolysis and melanoderma. Currently, the supplementation of this nutrient in sickle cell patients is important due to its systemic and immunological action. Objectives: To analyze the impact of VD in children with SCD. METHODS: This is an integrative literature review, which analyzed studies, originally published in English and Portuguese, in the last ten years, in humans, using the MedLine, SciELO and LILACS databases as References. The search was performed by consulting the MeSH. The descriptors used were: "children"; "vitamin D"; "sickle cell anemia"; "supplementation". 32 articles were identified from the search phrase. When applying the inclusion criteria, nine articles were chosen for the study. RESULTS: Among the included articles, six evaluated the prevalence of VD deficiency in children with sickle cell anemia, and the other three reported on VD supplementation in children with sickle cell anemia. All studies showed that children treated with VD replacement had a decrease in emergency room visits and greater hemodynamic stability during treatments. CONCLUSION: Further randomized controlled trials should be carried out to identify the role of VD in quality of life and in the reduction of sickle cell morbidity. The contribution of this paper is to recognize that there is evidence about vitamin D outside of randomized controlled trials.

Liga Acadêmica de Hematologia (HemoLiga): atuação no ensino, pesquisa e extensão / Academic League of Hematology (HemoLiga): performance in Teaching, Research and Extension*

Introdução: As Ligas Acadêmicas (LAs) são organizações universitárias muito presentes nos cursos de medicina no Brasil, são de caráter extracurricular e complementar, fundamentadas no tripé ensino, pesquisa e extensão (EPE). Suas atividades tendem a aprofundar os conhecimentos sobre determinado tema, estimular a criatividade, o autoaprendizado e o espírito crítico dos estudantes a fim de proporcionar uma melhor formação profissional. Objetivo: Relatar o histórico e a atuação da HemoLiga (HL) com foco na produção científica e compará-la com outras LAs de Medicina do Brasil descritas na literatura. Material e Métodos: Leitura e análise das atas de reuniões da HL para a documentação histórica da liga associada a busca dos Currículos Lattes dos atuais e ex-integrantes da HL para levantamento de dados sobre a produção científica da liga. As informações obtidas foram tabeladas em planilhas de acordo com os subtipos de trabalhos. Foram realizados análises e cruzamento de variáveis para confecção de gráficos. Resultados: A HL é uma liga vinculada a três faculdades de medicina e possui 14 anos de existência. Ela atua no ensino através de reuniões e estágios práticos na área de Hematologia. A pesquisa constitui sua principal atuação, integrando, inclusive, linha de pesquisa internacional. Assim, desde a sua fundação, a HL consta de uma lista de 217 trabalhos científicos produzidos, sendo 32 artigos científicos, 180 resumos, três capítulos de livros e dois livros. Na extensão, a liga agrega os projetos Unir para Cuidar, Doador do Futuro, Triagem Neonatal e Amigo de Sangue. Conclusão: A HL por meio do seu escopo de atuação, em consonância com outras LAs, contribui através de seu perfil de iniciação científica na formação acadêmica de seus membros, além de beneficiar a sociedade através de seus projetos de extensão.

Introduction: The Academic Leagues (ALs) are very present organizations in Medicine courses in Brazil. They are extracurricular and complementary activities which are based on tripod education, research, and extension, aiming to promote a more profound knowledge on a given topic. As a result, it stimulates creativity, self-learning, and critical thinking to provide better professional training. Objective: Report the history and performance of HemoLiga (HL), focusing on scientific production and compare it with other Brazilian Medicine ALs presented in the literature. Material and Methods: Reading and analysis of HL meeting minutes for the league's historical documentation associated with the study of the Lattes Curriculum of current and former HL members to collect data on the league's scientific production. The information obtained was tabulated in spreadsheets according to the subtypes of work. Analysis and crossing of variables were performed to produce graphics. Results: HL has been functioning for 14 years and it is linked to three Medicine courses in Juiz de Fora. The aim of education is obtained through meetings and internships in the area of Hematology. Research is its main activity, including an international line of research. Since its foundation, HL has produced a list of 217 scientific works, including 32 scientific articles, 180 abstracts, three book chapters, and two books. Regarding the extension aspect, the league worked on the projects Unir para Cuidar, Doador do Futuro, Triagem Neonatal and Amigo de Sangue. Conclusion: Through its scope of action, as other ALs, HL contributes through its scientific initiation profile to the academic training of its members, in addition to benefiting society through its extension projects.

Hemoglobin S identification in blood donors: A cross section of prevalence

ABSTRACT Introduction: In Brazil, the sickle cell trait (SCT) has an average prevalence of 4% in the general population and 6-10% among Afro-descendants. Although SCT is highly prevalent, a large segment of the population ignores their status. The Therapeutic Guidelines prohibit the transfusion of SCT red blood cells into patients with hemoglobin disorders or severe acidosis and newborns. Methods: This was a cross-sectional study with data from 37,310 blood donation candidates. The study included only eligible first-time donors qualified to be tested for the presence of hemoglobin S (HbS) at the Fundação Hemominas Juiz de Fora, Brazil. The variables studied were gender, skin color, age, type of donation, place of birth, blood type, result of the solubility test for hemoglobin S (HbST) and hemoglobin electrophoresis (HbEF). Statistical analysis was performed using the Q square test and the Kappa index of agreement for comparing biochemical methods. This project was approved by the National Research Ethics Committee. Results: The analysis of first-time donor data showed that 7166 were considered eligible. A total of 127 of the 7166 donors were carriers of SCT (1.77%). Among the blood donors, 73.23% were from the local area. The HbST and HbEF were found to be 100% in concordance. Sensitivity was not tested in the present study. Conclusions: The HbST is highly specific for identifying the HbS, but sensitivity was not tested in this study. The screening of blood donors for abnormal hemoglobins is useful, helping to detect and counsel heterozygous people. The study seeks to identify the prevalence of SCT in a region of Brazil.

Hemoglobin S identification in blood donors: A cross section of prevalence.

INTRODUCTION: In Brazil, the sickle cell trait (SCT) has an average prevalence of 4% in the general population and 6-10% among Afro-descendants. Although SCT is highly prevalent, a large segment of the population ignores their status. The Therapeutic Guidelines prohibit the transfusion of SCT red blood cells into patients with hemoglobin disorders or severe acidosis and newborns. METHODS: This was a cross-sectional study with data from 37,310 blood donation candidates. The study included only eligible first-time donors qualified to be tested for the presence of hemoglobin S (HbS) at the Fundação Hemominas Juiz de Fora, Brazil. The variables studied were gender, skin color, age, type of donation, place of birth, blood type, result of the solubility test for hemoglobin S (HbST) and hemoglobin electrophoresis (HbEF). Statistical analysis was performed using the Q square test and the Kappa index of agreement for comparing biochemical methods. This project was approved by the National Research Ethics Committee. RESULTS: The analysis of first-time donor data showed that 7166 were considered eligible. A total of 127 of the 7166 donors were carriers of SCT (1.77%). Among the blood donors, 73.23% were from the local area. The HbST and HbEF were found to be 100% in concordance. Sensitivity was not tested in the present study. CONCLUSIONS: The HbST is highly specific for identifying the HbS, but sensitivity was not tested in this study. The screening of blood donors for abnormal hemoglobins is useful, helping to detect and counsel heterozygous people. The study seeks to identify the prevalence of SCT in a region of Brazil.