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vitamin a pregnancy

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https://www.readbyqxmd.com/read/28934718/urinary-bpa-and-phthalate-metabolite-concentrations-and-plasma-vitamin-d-levels-in-pregnant-women-a-repeated-measures-analysis
#1
Lauren E Johns, Kelly K Ferguson, David E Cantonwine, Thomas F McElrath, Bhramar Mukherjee, John D Meeker
BACKGROUND: In addition to its well-established role in maintaining skeletal health, vitamin D has essential regulatory functions in female reproductive and pregnancy outcomes. Phthalates and bisphenol A (BPA) are endocrine disruptors, and previous research has suggested that these chemical agents may disrupt circulating levels of total 25(OH)D in adults. OBJECTIVES: We investigated the relationships between repeated measures of urinary phthalate metabolites and BPA and circulating total 25(OH)D in a prospective cohort of pregnant women...
August 31, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28924373/association-of-maternal-serum-25-hydroxyvitamin-d-concentrations-in-second-trimester-with-delivery-mode-in-a-chinese-population
#2
Yingdi Yuan, Heng Liu, Chenbo Ji, Xirong Guo, Lingmin Hu, Juan Wen, Manhong Cai
Objective: To determine the maternal serum 25-hydroxyvitamin D [25(OH)D] concentrations in a Chinese population and investigate its associations with subsequent delivery mode by studying 1924 unrelated pregnant women. Methods: The serum 25(OH)D concentrations was measured by euzymelinked immunosorbent assay (ELISA). Simultaneously, maternal information and subsequent delivery mode were collected. Logistic regression analysis was performed to assess the associations between 25(OH)D concentrations and caesarean section...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28923762/translating-basic-research-into-clinical-practice-vitamin-d-in-asthma-mechanisms-of-action-and-considerations-for-clinical-trials
#3
REVIEW
Paul E Pfeffer, Catherine M Hawrylowicz
There is increasing interest in the therapeutic utility of vitamin D in asthma, supported by a significant body of evidence on epidemiological associations between vitamin D insufficiency and worse asthma control. In support of a causal relationship, vitamin D beneficially modulates diverse immunological pathways in heterogeneous asthma endotypes, regulating the actions of lymphocytes, mast cells, antigen-presenting cells and structural cells to dampen excessive inflammatory responses. Allergic asthma is characterised by a failure of immune tolerance, and development of pathological responses to inhaled aeroallergens, and vitamin D has been extensively shown to support immune regulation...
September 15, 2017: Chest
https://www.readbyqxmd.com/read/28923490/the-association-of-maternal-asthma-and-early-pregnancy-vitamin-d-with-risk-of-preeclampsia-an-observation-from-vitamin-d-antenatal-asthma-reduction-trial-vdaart
#4
Hooman Mirzakhani, Vincent J Carey, Thomas F McElrath, Nancy Laranjo, George O'Connor, Ronald E Iverson, Aviva Lee-Parritz, Robert C Strunk, Leonard B Bacharier, George A Macones, Robert S Zeiger, Michael Schatz, Bruce W Hollis, Augusto A Litonjua, Scott T Weiss
BACKGROUND: Maternal asthma, uncontrolled asthma, and low vitamin D levels during pregnancy have been individually linked to increased risk of preeclampsia. OBJECTIVE: To investigate the association of history of physician-diagnosed asthma and uncontrolled asthma status during pregnancy with the risk of preeclampsia and the effects of early pregnancy vitamin D concentrations on this relationship. METHODS: A total of 816 subjects with available pregnancy outcome data and risk factors of interest were analyzed...
September 8, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28923327/vitamin-e-deficiency-and-oxidative-status-are-associated-with-prediabetes-in-apparently-healthy-subjects
#5
Gabriela Rodríguez-Ramírez, Luis E Simental-Mendía, Manuela de la A Carrera-Gracia, Martha-Angélica Quintanar-Escorza
BACKGROUND: Previous studies have indicated that vitamin E deficiency and oxidative stress affect the beta cell function. Hence, the aim of this study was to determine the association between vitamin E deficiency and oxidative status with prediabetes in apparently healthy subjects. METHODS: Apparently healthy men and women aged 18-65 years were enrolled in a case-control study. Individuals with new diagnosis of prediabetes were considered as cases and compared with a control group of individuals with normal glucose tolerance...
April 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28920568/pregnant-women-of-south-asian-ethnicity-in-canada-have-substantially-lower-vitamin-b12-status-compared-with-pregnant-women-of-european-ethnicity
#6
Theresa H Schroder, Graham Sinclair, Andre Mattman, Benjamin Jung, Susan I Barr, Hilary D Vallance, Yvonne Lamers
Maternal vitamin B12 (B12) status has been inversely associated with adverse pregnancy outcomes and positively with fetal growth and infant development. South Asians, Canada's largest ethnic minority, are prone to B12 deficiency. Yet, data are lacking on B12 status in South Asian pregnant women in North America. We sought to determine B12 status, using multiple biomarkers, in 1st and 2nd trimester pregnant women of South Asian and, for comparison, European ethnicity living in Vancouver, Canada. In this retrospective cohort study, total B12, holotranscobalamin (holoTC), methylmalonic acid (MMA), and total homocysteine concentrations were quantified in two routinely collected (mean gestational week: 11·5 (range 8·3-13·9) and 16·5 (range 14·9-20·9)), banked serum samples of 748 healthy pregnant South Asian (n 371) and European (n 377) women...
September 18, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28912817/the-effects-of-vitamin-d-supplement-on-prevention-of-recurrence-of-preeclampsia-in-pregnant-women-with-a-history-of-preeclampsia
#7
Sanam Behjat Sasan, Farnaz Zandvakili, Nasrin Soufizadeh, Elaheh Baybordi
INTRODUCTION: Preeclampsia is a pregnancy-specific syndrome. One of the hypotheses concerning the etiology of preeclampsia is vitamin D deficiency during pregnancy. METHOD AND MATERIALS: The present study is a randomized controlled clinical trial which aims to determine the effect of vitamin D supplement on reducing the probability of recurrent preeclampsia. 72 patients were placed in control group while 70 patients were randomized to the intervention group. The intervention group received a 50000 IU pearl vitamin D3 once every two weeks...
2017: Obstetrics and Gynecology International
https://www.readbyqxmd.com/read/28911161/letter-to-the-editor-genetics-and-vitamin-d-supplementation-in-pregnancy
#8
Stavroula A Paschou, Panagiotis G Anagnostis, Giovanna Muscogiuri, Dimitrios G Goulis, Andromachi Vryonidou
No abstract text is available yet for this article.
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28910945/-nested-case-control-study-on-associated-factors-for-anemia-during-pregnancy
#9
C L Fan, J Y Luo, W J Gong, X Q Liu, S J Zhou, F F Zhang, J Zeng, H X Li, N Feng
Objective: To explore the related factors of anemia during pregnancy and provide scientific evidence for the primary prevention of anemia during pregnancy. Methods: The pregnant women (≤12 pregnant weeks) who received the first pregnancy care in a local medical institution in Hunan province from June 2013 to November 2014 were included in this cohort study, and for them anemia had been excluded by physical examination. Baseline survey and follow up till childbirth were conducted for them. A queue-based nested case-control study (1 ∶ 2) was conducted (380 pregnant women with anemia detected in this study as case group, 760 pregnant women without anemia randomly selected and matched by age, habitual residence during pregnancy as control group...
September 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28904494/vitamin-d-deficiency-does-not-influence-reproductive-outcomes-of-ivf-icsi-a-study-of-oocyte-donors-and-recipients
#10
Manish Banker, Dipesh Sorathiya, Sandeep Shah
BACKGROUND: Vitamin D and its active metabolite, 1,25-dihydroxy vitamin D (1,25-(OH)2D3), play a significant role in reproduction. AIM: To assess the effect of serum 25-hydroxy vitamin D level on oocyte quality and endometrial receptivity by studying oocyte donors and their recipients. MATERIALS AND METHODS: This prospective study consisted of two groups: Group A (recipient group) and Group B (donor group). All the participants of Groups A1 and B1 as well as Groups A2 and B2 were subcategorized into vitamin D-deficient (<20 ng/mL) and vitamin D replete-insufficient (20 to ≥30 ng/mL), respectively...
April 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28904091/25-hydroxyvitamin-d-deficiency-and-risk-of-ms-among-women-in-the-finnish-maternity-cohort
#11
Kassandra L Munger, Kira Hongell, Julia Åivo, Merja Soilu-Hänninen, Heljä-Marja Surcel, Alberto Ascherio
OBJECTIVE: To determine whether and to what extent vitamin D deficiency is associated with multiple sclerosis (MS) risk. METHODS: We conducted a prospective nested case-control study among women in the Finnish Maternity Cohort (FMC). The FMC had 1.8 million stored serum samples taken during the pregnancies of over 800,000 women at the time of this study. Through linkages with hospital and prescription registries, we identified 1,092 women with MS diagnosed between 1983 and 2009 with at least 1 serum sample collected prior to date of MS diagnosis; ≥2 serum samples were available for 511 cases...
September 13, 2017: Neurology
https://www.readbyqxmd.com/read/28902929/women-with-recurrent-spontaneous-abortion-have-decreased-25-oh-vitamin-d-and-vdr-at-the-fetal-maternal-interface
#12
N Li, H M Wu, F Hang, Y S Zhang, M J Li
Immunological mechanisms have been proposed to underlie the pathogenesis of recurrent spontaneous abortion (RSA). Vitamin D has a potent immunomodulatory effect, which may affect pregnancy outcome. The objective of this study was to investigate 25-hydroxyvitamin D [25(OH) D] concentration and vitamin D receptor (VDR) expression in the decidual tissues of RSA patients. Thirty women with RSA (RSA group) and thirty women undergoing elective abortion (control group) were recruited during 2016 from gynecology outpatient clinics...
September 12, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28901336/vitamin-d-and-probiotics-supplement-use-in-young-children-with-genetic-risk-for-type-1-diabetes
#13
J Yang, R N Tamura, U M Uusitalo, C A Aronsson, K Silvis, A Riikonen, N Frank, G Joslowski, C Winkler, J M Norris, S M Virtanen
BACKGROUND/OBJECTIVES: Vitamin D and probiotics are nutrients of interest in the context of type 1 diabetes (T1D). We assessed the prevalence of and factors associated with vitamin D and probiotic supplementations among young children with genetic risk of T1D. SUBJECTS/METHODS: Use of supplements during the first 2 years of life was collected prospectively from 8674 children in The Environmental Determinants of Diabetes in the Young (TEDDY) study. RESULTS: Single and/or multivitamin/mineral (MVM) supplements were reported by 81% of the children...
September 13, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28900363/concerning-the-vitamin-d-reference-range-pre-analytical-and-analytical-variability-of-vitamin-d-measurement
#14
REVIEW
Davide Ferrari, Giovanni Lombardi, Giuseppe Banfi
Unlike other vitamins, the vitamin D concentration in blood varies cyclically over the course of the year in relation to genetic (gender, ethnicity, polymorphisms) and environmental factors (sunlight exposure, diet, food-related or direct vitamin D supplementation, skin pigmentation). Although the major diagnostics manufacturers have recently developed improved automated 25-hydroxy vitamin D immunoassays, the intra- and inter-laboratory variability is still high (especially at low vitamin D concentrations) which might lead to incorrect vitamin D deficiency/insufficiency diagnosis...
October 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/28888834/season-of-birth-and-primary-central-nervous-system-tumors-a%C3%A2-systematic-review-of-the-literature-with-critical-appraisal-of-underlying-mechanisms
#15
REVIEW
Marios K Georgakis, Erato Ntinopoulou, Despoina Chatzopoulou, Eleni Th Petridou
PURPOSE: Season of birth has been considered a proxy of seasonally varying exposures around perinatal period, potentially implicated in the etiology of several health outcomes, including malignancies. METHODS: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, we have systematically reviewed published literature on the association of birth seasonality with risk of central nervous system tumors in children and adults. RESULTS: Seventeen eligible studies using various methodologies were identified, encompassing 20,523 cases...
August 24, 2017: Annals of Epidemiology
https://www.readbyqxmd.com/read/28888754/effect-of-antioxidant-supplementation-on-the-auditory-threshold-in-sensorineural-hearing-loss-a-meta-analysis
#16
Maria Eduarda Di Cavalcanti Alves de Souza, Klinger Vagner Teixeira da Costa, Paulo Augusto Vitorino, Nassib Bezerra Bueno, Pedro de Lemos Menezes
INTRODUCTION: Hearing loss is conceptualized as any impairment of the ability to hear and/or detect speech or environment sounds, regardless of cause, type, or degree. It may occur at different stages of life; during pregnancy or childbirth, in childhood, adulthood or old age. It should be noted that aging is the most common cause of sensorineural hearing loss followed by noise-induced hearing loss, and both are closely related to the formation of reactive oxygen species. Dietary antioxidant supplementation has been employed as a therapeutic strategy to prevent and/or delay the risks of major human diseases...
August 26, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28887720/early-folic-acid-supplement-initiation-and-risk-of-adverse-early-childhood-respiratory-health-a-population-based-study
#17
Vivian H Alfonso, Gretchen Bandoli, Ondine von Ehrenstein, Beate Ritz
Objectives Folate plays a vital role in biologic functions yet women often do not meet the recommended dietary intake in pregnancy. It has been suggested that high folic acid intake during pregnancy may increase the risk of respiratory diseases in offspring. However, findings from observational studies in human populations are inconclusive. Methods In this population-based study, we collected self-reported folic acid and prenatal vitamin supplement use during pregnancy 3-6 months postpartum from mothers in Los Angeles whose children were born in 2003...
September 8, 2017: Maternal and Child Health Journal
https://www.readbyqxmd.com/read/28885564/relationship-between-the-nutritional-status-of-vitamin-a-per-trimester-of-pregnancy-with-maternal-anthropometry-and-anemia-after-roux-en-y-gastric-bypass
#18
Sabrina Cruz, Andréa Matos, Suelem Pereira da Cruz, Silvia Pereira, Carlos Saboya, Andréa Ramalho
The aim of this study was to compare the nutritional status of vitamin A per trimester of pregnancy, as well as to assess its influence on pre-pregnancy BMI, total gestational weight gain (TGWG) and presence of anemia in women who had previously undergone Roux-en-Y gastric bypass (RYGB). An analytical, longitudinal and retrospective study comprising 30 pregnant women who had previously undergone RYGB was undertaken. In all trimesters of pregnancy, the serum concentrations of retinol, β-carotene, stages of vitamin A deficiency (VAD), night blindness (NB), anemia and anthropometric variables were assessed...
September 8, 2017: Nutrients
https://www.readbyqxmd.com/read/28880995/vitamin-a-supplements-for-reducing-mother-to-child-hiv-transmission
#19
REVIEW
Charles S Wiysonge, Valantine N Ndze, Eugene J Kongnyuy, Muki S Shey
BACKGROUND: Strategies to reduce the risk of mother-to-child transmission of the human immunodeficiency virus (HIV) include lifelong antiretroviral therapy (ART) for HIV-positive women, exclusive breastfeeding from birth for six weeks plus nevirapine or replacement feeding plus nevirapine from birth for four to six weeks, elective Caesarean section delivery, and avoiding giving children chewed food. In some settings, these interventions may not be practical, feasible, or affordable. Simple, inexpensive, and effective interventions (that could potentially be implemented even in the absence of prenatal HIV testing programmes) would be valuable...
September 7, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28870723/managing-malnourishment-in-pregnancy-after-bariatric-surgery
#20
Rachel K Harrison, Charles Berkelhammer, Victor Suarez, Helen H Kay
BACKGROUND: Little information exists to guide monitoring and treatment of malnourishment during pregnancy after bariatric surgery. Here we present a case with severe deficiencies and recommendations for testing and treatment. CASE: Our patient underwent a duodenal switch procedure resulting in significant weight loss and numerous deficiencies. She then experienced a neonatal demise with multiple congenital abnormalities, including diaphragmatic hernia, possibly related to severe vitamin A deficiency...
September 1, 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
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