Browsing by Author "Ribeiro, Angela Maria"

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    Effects of vaccination against the H1N1 virus on BDNF and TNF-α plasma levels in pregnant women.
    (2018) Dias, Fernando Machado Vilhena; Diniz, Mirla Fiuza; Franco, Glaura da Conceição; Miranda, Aline Silva de; Teixeira, Antônio Lúcio; Nunes, Poliana Toledo; Ribeiro, Angela Maria
    Background: Vaccination is a widespread strategy to protect women and their children during fetal development. However, there is a lack of knowledge about potential effects of H1N1 vaccination on concentration of cytokines that are important to mother’s central nervous system functions and fetal neurodevelopment. Objective: The main purpose of the present study was to evaluate such interaction. The specific goals were to study the effects of vaccination against the H1N1 virus on plasma levels of the Brain Derived Neurotrophic Factor(BDNF), Tumor Necrosis Factor- (TNF-) and TNF- Receptors 1 and 2 (sTNFR1; sTNFR2), in different periods of gestation. Methods: Data were obtained during the period of 6 months in 2010, from a sample of 94 pregnant women who were using the health care service of Conceição do Mato Dentro, a rural area in the state of Minas Gerais, Brazil. Seventeen women were in the first trimester of pregnancy, forty were in the second trimester and 37 were in the third trimester. Each of these groups was divided into two subgroups as follows: immunized against the H1N1 virus (I) and non-immunized (NI). Plasma concentrations of BDNF, TNF-, sTNFR1 and sTNFR2 were measured using the sandwich ELISA. Results: There was no difference in cytokine or neurotrophic factor levels evaluated between groups I and NI in any trimesters. Conclusion: These results show that the recommendation of vaccination against the H1N1 virus for all pregnant women as a public health measure could be considered safe, regarding aspects related to the role played
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    Social vulnerability : the connection between psychiatric disorders and thiamine deficiency in pregnant women.
    (2020) Dias, Fernando Machado Vilhena; Oliveira, Aline Sanches; Dias Júnior, Cláudio Santiago; Franco, Glaura da Conceição; Teixeira, Antônio Lúcio; Nunes, Poliana Toledo; Oliveira, Patricia da Silva; Ribeiro, Angela Maria
    The evaluation of thiamine and its derivative phosphate esters levels in pregnant women in rural communities can contribute not only for understanding the specific characteristics of this population regarding nutritional aspects, but also for clarifying the relations of psychiatric manifestations and a vitamin deficit. In the present work we assessed sociodemographic variables, psychiatric parameters and thiamine and its derivative in the whole blood of women in a rural, low-income community in Brazil. A case-control study was done. 94 women were divided in groups using the trimesters of pregnancy as a criterion: each trimester, 1st, 2nd and 3rd had 17, 37 and 38 women, respectively. A control group of non-pregnant women (n-39) was also included. Symptoms of anxiety and depression were assessed using the HAMA Scale and Beck Inventory, respectively. The thiamine and its phosphorylated derivatives concentrations were determined in whole blood samples using the HPLC method. The results suggest that physiological mechanisms linked to the metabolic pathways of thiamine may play a role in some neurobiological substrate involved in the regulation of emotional state. Thus, social vulnerability is identified as an important factor to be considered in the evaluation of the mental health of pregnant women living in rural communities.
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    The connection between maternal thiamine shortcoming and offspring cognitive damage and poverty perpetuation in underprivileged communities across the world.
    (2013) Dias, Fernando Machado Vilhena; Silva, Danielle Marra de Freitas; Doyle, Flavia Costa de Proença; Ribeiro, Angela Maria
    The acquisition of cognitive, sensory-motor and social emotional functions depend on a proper development of the Central Nervous System (CNS). This set of functions, known as intelligence, allows a better adaptation to the environment. In the last decades, an increase in the average of intelligence has been reported. However, such an increase cannot be observed in an equivalent way in economically and social underprivileged regions. Children from those regions are in great risk of being affected by mental retardation or impaired cognitive development. In later life they will, probably, be unable to transform and improve themselves and their communities, perpetuating the poverty of the region. Therefore, knowledge of factors involved in CNS development is a matter of health closely related to social improvement. Malnutrition throughout pregnancy and breastfeeding is clearly identifiable as a cause of damage in CNS development. Vitamin B1 (Thiamine) is a micronutrient important to the growth and maturity of the CNS. Thiamine shortcoming may affect 50% of pregnant women. Thiamine function in cerebral development is still not well known. There is a gap in the literature regarding systematical research about the blood thiamine concentration throughout the periods of gestation and breastfeeding. These studies are relevant in populations with a high level of nutritional vulnerability, because in a follow up offspring cognitive exam they could reveal if the maternal thiamine deficiency is related to child CNS impairment. This paper introduce the hypothesis that thiamine shortcoming during pregnancy and breastfeeding is directly related to cognitive impairment of child. Data about the neurophysiological role of thiamine, consequences of its shortcoming in experimental models, populations under the risk of thiamine shortcoming are presented. The hypothesis that maternal thiamine shortcoming causes damage related to child cognitive development needs to be considered. Thus, thiamine shortcoming during gestation and breastfeeding and its effects on children must be studied in many populations in order to know the magnitude of the problem and to indicate actions to overcome it.