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1.
Zhonghua Liu Xing Bing Xue Za Zhi ; 41(8): 1359-1364, 2020 Aug 10.
Artigo em Chinês | MEDLINE | ID: mdl-32867450

RESUMO

Objectives: To analyze the epidemiological characteristics and levels of vitamin B(12) and folate as well as their relationship in women awaiting delivery, in Shaanxi province. Methods: Data were collected from healthy pregnant women who gave birth at six top hospitals in Shaanxi, from January 2014 to December 2016. Blood samples were taken prenatally to determine the levels of vitamin B(12) and folate. Quantile regression model was used to analyze the relationship between the levels of vitamin B(12) and folates in women awaiting delivery. Results: A total of 1 277 women awaiting delivery were included in this study. Among them, the median level of serum vitamin B(12) was 164.7 pg/ml, in women at late pregnancy, with the deficiency rate as 69.6%, while the median level of serum folate was 7.6 ng/ml, with the deficiency rate as 12.1%. 58.4% of these women presented simple vitamin B(12) deficiency and 0.9% with simple folate deficiency. Women living in rural areas showed lower levels of both vitamin B(12) and folate than the women from the urban areas. Both the levels of vitamin B(12) and folate increased with age but were significantly lower in women under the age of 25. Among those with or without folate deficiency, the average difference in the levels of vitamin B(12) was 37.62 pg/ml. Quantile regression models showed that the vitamin B(12) levels in women with folate deficiency were significantly lower than those without, despite the different levels of vitamin B(12). This difference appeared increasing along with the increase of the vitamin B(12) levels. Conclusions: Our data showed that both vitamin B(12) and folate were deficient in women awaiting delivery, in Shaanxi. We suggest that vitamin B(12) should also be added into the folic acid supplementation program, together with the reinforcement on health education program to improve the awareness of nutrient supplementation in rural and young women. Hopefully, these strategies could increase the levels of both vitamin B(12) and folate, in the province.


Assuntos
Deficiência de Ácido Fólico/epidemiologia , Ácido Fólico/sangue , Deficiência de Vitamina B 12/epidemiologia , Vitamina B 12/sangue , China/epidemiologia , Parto Obstétrico , Feminino , Humanos , Gravidez
2.
Rev Environ Health ; 35(3): 277-280, 2020 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-32651989

RESUMO

Objectives Exposure to inorganic arsenic (iAs) is a world-wide health concern. We reported that Japanese children and pregnant women are exposed to moderate levels of iAs through food. Reducing iAs contamination from foods of high iAs is an important issue unique in Japan. Integrated iAs is methylated to less toxic organic forms, and S-adenosyl-L-methyonine (SAM), a common methyl-donor of DNA and histones, is utilized in this process. Chronic consumption of SAM by iAs metabolism due to exposure to iAs might alter the epigenetic modification of genome. The SAM biosynthesis pathway is dependent on folate cycle, and it is possible that ingestion of sufficient folic acid (FA) is protective to iAs induced toxicity. Methods In the course of our cross-sectional body burden analyses of Pb and iAs in Japanese children and pregnant women, termed "PbAs study", FA concentration in serum of 104 pregnant women was measured. Results Mean (±SEM) of serum FA concentration was 15.8 ± 1.3 (ng/mL). There are significant number of people showing very high FA (>30 ng/ mL), and large fraction of them were taking supplements daily. Conclusions These results suggested that level of FA ingestion of Japanese pregnant women is high for supporting normal fetal development.


Assuntos
Ácido Fólico/sangue , Adulto , Arsênico/metabolismo , Feminino , Humanos , Japão , Chumbo/metabolismo , Gravidez , Adulto Jovem
3.
Nutr Metab Cardiovasc Dis ; 30(6): 939-947, 2020 06 09.
Artigo em Inglês | MEDLINE | ID: mdl-32404292

RESUMO

BACKGROUND AND AIMS: Elevated homocysteine concentration is associated with a higher risk of cardiovascular disease. The aim of our study was to determine the environmental and genetic factors associated with serum homocysteine concentration in healthy young adults. Moreover, we aimed to determine the cutoff value of homocysteine concentration for predicting unfavorable MTHFR genotype and to investigate whether this association is modified by dietary patterns and serum folate status. METHODS AND RESULTS: A total of 744 healthy individuals, aged 18-35 years, were included in the study. Diet quality was assessed by establishing diet quality scores and adherence to the pro-Healthy Diet Index (pHDI) and non-Healthy Diet Index (nHDI). Genotyping was performed using the TaqMan method. Multivariate analysis showed that pHDI, creatinine, folate concentrations, and the T/T genotype of the C677T polymorphism in MTHFR, as well as the interaction between the T/T genotype of MTHFR (C677T polymorphism) and folate level, were most strongly related to homocysteine concentrations. The specificity of a homocysteine >13.1 µmol/l in predicting T/T homozygous status was 76% (area under the curve 0.68). CONCLUSION: Healthy dietary patterns, folate, and creatinine levels, as well as the C677T polymorphism, proved to be the strongest predictors of homocysteine concentrations. T/T genotype of MTHFR modifies the relationship between folate and homocysteine.


Assuntos
Dieta Saudável , Comportamento Alimentar , Interação Gene-Ambiente , Homocisteína/sangue , Metilenotetra-Hidrofolato Redutase (NADPH2)/genética , Polimorfismo Genético , Adolescente , Adulto , Fatores Etários , Biomarcadores/sangue , Creatinina/sangue , Feminino , Ácido Fólico/sangue , Voluntários Saudáveis , Humanos , Masculino , Adulto Jovem
4.
South Med J ; 113(4): 156-163, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32239227

RESUMO

OBJECTIVES: Studies have examined the association between tobacco use and folate levels in pregnancy, yet few have assessed this relation using objective and accurate measures of both smoking and folate. In this study, we evaluated the association between maternal cotinine levels and periconceptional red blood cell (RBC) folic acid reserves in a cohort of low-income pregnant mothers. METHODS: Smoking information, based on salivary cotinine, a highly sensitive and specific tobacco smoke exposure biomarker, was used. Furthermore, folate was assessed using RBC folate, an indicator of long-term folate storage. Participants were early to mid-trimester pregnant women who received antenatal care between 2011 and 2015 at the Genesis Clinic of Tampa (Florida). A total of 496 women were enrolled in the study. Associations between smoking status/maternal salivary cotinine concentrations, sociodemographic factors, and folate concentrations were investigated using Tobit regression analyses. RESULTS: The mean folate level of the participants was 718.3 ± 183.2 ng/mL, and only 2 (0.4%) participants were deficient in folate. We observed no significant difference in folate levels by smoking status. In contrast, salivary cotinine levels were significantly associated with decreased RBC folate concentrations (ß -11.43, standard error 5.45, P = 0.032). Prepregnancy maternal body mass index, gestational age, stress, and depression also were associated with folate levels. CONCLUSIONS: Low RBC folate is associated with perinatal factors, including high maternal cotinine levels, body mass index, stress, and depression. The effect of low folate levels among smokers cannot be overemphasized, considering that tobacco products not only reduce folate levels but also decrease the bioutilization of folate.


Assuntos
Cotinina/análise , Eritrócitos/química , Fertilização/fisiologia , Ácido Fólico/análise , Ácido Fólico/sangue , Adulto , Biomarcadores/análise , Biomarcadores/sangue , Estudos de Coortes , Cotinina/sangue , Feminino , Florida , Humanos , Gravidez , Poluição por Fumaça de Tabaco/análise
5.
Am J Clin Nutr ; 111(4): 919-926, 2020 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-32266401

RESUMO

BACKGROUND: Vitamin B-12 and folate deficiencies in women and children have important public health implications. However, the evidence is conflicting and limited on whether the influence of inflammation on biomarker concentrations may be sufficiently and consistently influenced by inflammation to require adjustment for interpreting concentrations or estimating population prevalence of deficiencies. OBJECTIVE: We examined correlations between concentrations of the inflammation biomarkers C-reactive protein (CRP) and α1-acid glycoprotein (AGP) and serum vitamin B-12 and serum and RBC folate among nonpregnant women of reproductive age (WRA; 15-49 yr) and preschool children (PSC; 6-59 mo). METHODS: We analyzed cross-sectional data from 16 nationally representative nutrition surveys conducted in WRA (n = 32,588) and PSC (n = 8,256) from the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia project. Spearman correlations between CRP or AGP and vitamin B-12 or folate concentrations were examined, taking into account complex survey design effects. RESULTS: Correlations between inflammation and vitamin B-12 or folate were weak, with no clear pattern of association in either WRA or PSC. Correlation coefficients between CRP and vitamin B-12 for WRA and PSC ranged from -0.25 to 0.16, and correlations between AGP and vitamin B-12 ranged between -0.07 and 0.14. Similarly, correlations between CRP and serum folate ranged from -0.13 to 0.08, and correlations between AGP and serum folate between -0.21 and 0.02. Only 3 surveys measured RBC folate, and among them, correlations for WRA ranged from -0.07 to 0.08 for CRP and -0.04 for AGP (1 country). CONCLUSIONS: Based on the weak and inconsistent correlations between CRP or AGP and vitamin B-12 or folate biomarkers, there is no rationale to adjust for inflammation when estimating population prevalence of vitamin B-12 or folate deficiencies in WRA or PSC.


Assuntos
Anemia/sangue , Ácido Fólico/sangue , Vitamina B 12/sangue , Adolescente , Adulto , Anemia/genética , Anemia/imunologia , Biomarcadores/sangue , Proteína C-Reativa/metabolismo , Criança , Pré-Escolar , Estudos Transversais , Feminino , Humanos , Lactente , Pessoa de Meia-Idade , Inquéritos Nutricionais , Orosomucoide/metabolismo , Adulto Jovem
6.
Medicina (Kaunas) ; 56(3)2020 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-32245061

RESUMO

Background and objectives: Although laparoscopic sleeve gastrectomy (LSG) is effective for obesity management, postoperative vitamin B12 (B12) deficiency is of major concern. In this cross-sectional study, we assessed the levels of B12 and its related functional biomarkers, namely, total homocysteine (tHcy), methylmalonic acid (MMA), folate, methylcitric acid (MCA), and hemoglobin (Hb), in one-year postoperative LSG patients and matched controls. Materials and Methods: Plasma B12, tHcy, MMA, folate, and MCA were measured in matched controls (n = 66) and patients (n = 71) using validated liquid chromatography-tandem mass spectrometry techniques and protocols in the United Arab Emirates (UAE). Results: The median B12 concentration in patients (177 pmol/L) was significantly lower (p < 0.001) than in the controls (334.7 pmol/L). The tHcy and MMA levels were significantly increased (p < 0.001 and p = 0.011, respectively) and folate levels were significantly decreased (p = 0.001) in the LSG patients compared to the controls. Interestingly, no significant difference in MCA levels were observed between the two groups. The levels of tHcy and MMA were concomitantly increased with the decreased folate levels in postoperative LSG patients when compared with the controls. The Hb levels were significantly lower in males and females in the patient group compared with those in the control group, respectively (p = 0.005 and p = 0.043). Conclusions: This is the first report of serum levels of B12 and its functional biomarkers in postoperative LSG patients among a local population from the UAE. Our findings revealed significant alterations of the B12 biomarkers, total B12, MMA, and tHcy in one-year postoperative LSG patients.


Assuntos
Gastrectomia/efeitos adversos , Complicações Pós-Operatórias/sangue , Complicações Pós-Operatórias/diagnóstico , Deficiência de Vitamina B 12/sangue , Deficiência de Vitamina B 12/diagnóstico , Adulto , Biomarcadores/sangue , Cromatografia Líquida , Citratos/sangue , Estudos Transversais , Feminino , Ácido Fólico/sangue , Hemoglobinas , Homocisteína/sangue , Humanos , Masculino , Espectrometria de Massas , Ácido Metilmalônico/sangue , Emirados Árabes Unidos
7.
Arch Gynecol Obstet ; 301(6): 1417-1422, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32347355

RESUMO

PURPOSE: To determine the influence of maternal diets on maternal and umbilical cord blood levels of vitamin B12, folic acid, ferritin, and hemoglobin. METHODS: A prospective observational study on women who maintained the same diet for at least 3 months prior to, and throughout current pregnancy. Women were divided according to their diet. Diet questionnaires were filled in during the 3rd trimester. Blood samples for complete blood counts and levels of ferritin, vitamin B12, folate, and albumin were taken from the women prior to delivery and from the umbilical cord immediately after delivery. RESULTS: The 273 enrolled women included 112 omnivores, 37 pescatarians, 64 vegetarians, and 60 vegans. There were no significant differences in the maternal B12 levels between the study groups (P = 0.426). Vegans had lower maternal ferritin levels compared to pescatarians (27 ± 17 vs 60 ± 74 ng/ml, respectively, P = 0.034), but not compared to vegetarians (P = 0.597), or omnivores (P = 1.000). There were no significant differences in the umbilical cord B12, folate, ferritin, and hemoglobin levels between the study groups. A sub-analysis that compared women who consumed multivitamins, B12 and iron supplements during pregnancy to women who did not, revealed differences in the levels of umbilical-cord B12 (1002 ± 608 vs 442 ± 151 pg/ml, respectively, P = 0.000) and maternal blood B12 (388 ± 209 vs 219 ± 95 pg/ml, respectively, P = 0.030) only among vegans, but not among omnivores. CONCLUSION: Vegan diet does not change the umbilical cord levels of B12, folic acid, ferritin, and hemoglobin. Vegans who do not take any vitamin supplementation are at greater risk for B12 deficiency than omnivores.


Assuntos
Dieta Vegana/métodos , Ferritinas/sangue , Sangue Fetal/química , Ácido Fólico/sangue , Vitamina B 12/sangue , Adulto , Feminino , Humanos , Masculino , Gravidez , Estudos Prospectivos
8.
Croat Med J ; 61(1): 28-32, 2020 02 29.
Artigo em Inglês | MEDLINE | ID: mdl-32118375

RESUMO

AIM: To compare the serum levels of 25-hydroxyvitamin D, ferritin, folate, vitamin B12, zinc, and thyroid stimulating hormone between patients with warts and healthy individuals. METHODS: This retrospective study enrolled 40 patients with warts and 40 healthy individuals treated at the Ufuk University Hospital, Ankara, between July and December 2017. Serum levels of 25-hydroxyvitamin D, ferritin, folate, vitamin B12, zinc, and thyroid stimulating hormone status were evaluated retrospectively. RESULTS: Participants with and without warts had similar mean serum 25-hydroxyvitamin D, ferritin, folate, zinc, and thyroid stimulating hormone levels. However, patients with warts had significantly lower mean serum vitamin B12 level (P=0.010). Patients with warts non-significantly more frequently had decreased serum levels of 25-hydroxyvitamin D, ferritin, and folate (P=0.330, P=0.200, P=0.070, respectively). CONCLUSION: Patients with warts may require evaluation of serum levels of vitamin B12, folate, ferritin, and vitamin D.


Assuntos
Ferritinas/sangue , Ácido Fólico/sangue , Vitamina B 12/sangue , Vitamina D/análogos & derivados , Verrugas/sangue , Adolescente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Vitamina D/sangue , Adulto Jovem
10.
Res Vet Sci ; 130: 59-67, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32145458

RESUMO

Folate (vitamin B9) and cobalamin (vitamin B12) play an important role in amino acid metabolism, nucleic acid synthesis, and methyl group transfer. Two intracellular enzymes, methionine synthase and methylmalonyl-CoA mutase, are folate and/or cobalamin-dependent, respectively. At the cellular level, a lack of folate and cobalamin leads to accumulation of serum homocysteine (HCY) and a lack of cobalamin leads to increased methylmalonic acid (MMA) concentrations. Altered serum HCY and MMA concentrations can influence amino acid metabolism and nucleic acid synthesis in pigs. Therefore, we aimed to evaluate serum folate, cobalamin, HCY, and MMA concentrations in postweaning pigs between 6 and 26 weeks of age. Serum samples from 12 pigs collected at week 6, 7, 8, 9, 10, 14, 18, 22, and 26 as part of an unrelated study were analyzed. Serum folate (p < .0001), cobalamin (p = .0001), HCY (p < .0001), and MMA (p < .0001) concentrations differed significantly during the postweaning period between 6 and 26 weeks of age; with significantly higher serum HCY (at weeks 6 and 7 compared to weeks 9, 14, 18, 22, and 26) and MMA concentrations (at weeks 6, 7, and 8 compared to weeks 14, 18, 22, and 26) and an overall decrease of serum MMA concentrations from week 6 to week 14 in the pigs studied. This study suggests age-dependent changes in intracellular folate- and cobalamin-dependent metabolites (i.e., HCY and MMA) in pigs between 6 and 26 weeks of age, possibly reflecting decreased availability of intracellular folate and/or cobalamin for amino acid metabolism, nucleic acid synthesis, and methyl group transfer.


Assuntos
Ácido Fólico/sangue , Soro/química , Sus scrofa/sangue , Vitamina B 12/sangue , Animais , Citoplasma/química , Homocisteína/sangue , Ácido Metilmalônico/sangue
11.
Artigo em Inglês | MEDLINE | ID: mdl-32121219

RESUMO

Ultraviolet radiation (UVR) is a ubiquitous exposure which may contribute to decreased folate levels. Skin pigmentation mediates the biological effect of UVR exposure, but its relationship to folate levels is unexamined. Interactions may exist between UVR and pigmentation genes in determining folate status, which may, in turn, impact homocysteine levels, a potential risk factor for multiple chronic diseases. Therefore, independent and interactive influences of environmental UVR and genetic variants related to skin pigmentation (MC1R-rs1805007, IRF4-rs12203592 and HERC2-rs12913832) on folate (red blood cell (RBC) and serum) and homocysteine levels were examined in an elderly Australian cohort (n = 599). Genotypes were assessed by RT/RFLP-PCR, and UVR exposures were assessed as the accumulated erythemal dose rate accumulated over 4 months (4M-EDR). Multivariate analysis found significant negative associations between 4M-EDR and RBC folate (p < 0.001, ß = -0.19), serum folate (p = 0.045, ß = -0.08) and homocysteine levels (p < 0.001, ß = -0.28). Significant associations between MC1R-rs1805007 and serum folate levels (p = 0.020), and IRF4-rs12203592 and homocysteine levels (p = 0.026) occurred but did not remain significant following corrections with confounders. No interactions between 4M-EDR and pigmentation variants in predicting folate/homocysteine levels were found. UVR levels and skin pigmentation-related variants are potential determinants of folate and homocysteine status, although, associations are mixed and complex, with further studies warranted.


Assuntos
Ácido Fólico/sangue , Homocisteína/sangue , Pigmentação da Pele/genética , Pele/efeitos da radiação , Raios Ultravioleta , Idoso , Austrália , Feminino , Genótipo , Humanos , Masculino
12.
JAMA Netw Open ; 3(2): e200100, 2020 02 05.
Artigo em Inglês | MEDLINE | ID: mdl-32101310

RESUMO

Importance: Patients with rheumatoid arthritis (RA) are at high risk for cardiovascular (CV) mortality, attributed to chronic inflammation coupled with elevated circulatory homocysteine levels. Increasing the serum folate level reduces homocysteine, but the association of serum folate concentration with CV mortality in patients with RA has not been previously examined. Objective: To examine the association of serum folate concentration and CV mortality risk among patients with RA. Design, Setting, and Participants: A cohort study of the third National Health and Nutrition Examination Survey (1988-1994) and 2011 Linked Mortality File was performed. Adults aged 18 years or older with self-reported physician-diagnosed RA were included. Data analysis was performed between April 2019 and June 2019. Exposure: Serum folate level. Main Outcomes and Measures: All-cause and CV mortality risk estimated using Cox proportional hazards models, adjusted for the complex survey design and patient characteristics, including demographic characteristics, body mass index, C-reactive protein level, smoking, RA medication use, and comorbid conditions. Results: A total of 683 patients with RA (mean [SE] age, 55.9 [1.0] years; 225 [30.2%] men; 478 [87.0%] white) were classified into tertiles based on serum folate levels, as follows: tertile 1, folate levels less than 4.3 ng/mL (n = 239); tertile 2, folate levels 4.3 ng/mL to 8.2 ng/mL (n = 234); and tertile 3, folate levels greater than 8.2 ng/mL (n = 210). During a median (interquartile range) follow-up of 17.4 (10.0-19.4) years, a total of 392 all-cause deaths and 258 CV deaths occurred. Compared with tertile 1, patients in tertile 2 had lower all-cause mortality risk (hazard ratio [HR], 0.63; 95% CI, 0.47-0.85). The risk of CV mortality was lower among patients in tertile 2 (HR, 0.52; 95% CI, 0.30-0.92) and tertile 3 (HR, 0.44; 95% CI, 0.26-0.75) compared with those in tertile 1 (P for trend = .01). Findings for CV mortality were consistent in a sensitivity analysis that estimated 10-year risk; patients in tertile 2 (HR, 0.31; 95% CI, 0.17-0.57) and tertile 3 (HR, 0.39; 95% CI, 0.22-0.69) had lower CV mortality risk compared with those in tertile 1 (P for trend = .04). Conclusions and Relevance: Among patients with RA, a serum folate level of at least 4.3 ng/mL was associated with lower CV mortality risk. Further research is needed to examine whether a causal relationship exists between serum folate and CV risk among patients with RA.


Assuntos
Artrite Reumatoide/sangue , Doenças Cardiovasculares/mortalidade , Ácido Fólico/sangue , Artrite Reumatoide/epidemiologia , Doenças Cardiovasculares/complicações , Causalidade , Feminino , Homocisteína/sangue , Humanos , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Medição de Risco , Estados Unidos
13.
Vet Immunol Immunopathol ; 221: 110013, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32058159

RESUMO

Similarly to aged humans, senior horses (≥20 years) exhibit chronic low-grade inflammation systemically, known as inflamm-aging. Inflamm-aging in the senior horse has been characterized by increased circulating inflammatory cytokines as well as increased inflammatory cytokine production by lymphocytes and monocytes in response to a mitogen. Little is currently known regarding underlying causes of inflamm-aging. However, senior horses are also known to present with muscle wasting and often the endocrinopathy pituitary pars intermedia dysfunction (PPID). Despite the concurrence of these phenomena, the relationships inflamm-aging may have with measures of body composition and pituitary function in the horse remain unknown. Furthermore, nutrition has been a focus of research in an attempt to promote health span as well as life span in senior horses, with some nutrients, such as omega-3 fatty acids, having known anti-inflammatory effects. Thus, an exploratory study of a population of n = 42 similarly-managed senior horses was conducted to determine relationships between inflamm-aging and measures of circulating nutrients, body composition, age, and PPID. Serum was collected to determine vitamin, mineral, and fatty acid content. Peripheral blood mononuclear cells were also isolated to determine inflammatory cytokine production of interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α) following stimulation with a mitogen, as well as to determine gene expression of interleukin(IL)-1ß, IL-6, IL-10, IFN-γ, and TNF-α. Serum IL-6 and C-reactive protein were determined by enzyme-linked immunosorbent assay. Whole blood was collected for hematological and biochemical analysis. Body composition was evaluated via ultrasound and muscle scoring for all 42 horses as well as by deuterium oxide dilution for a subset of n = 10 horses. Pituitary function was evaluated by measuring basal adrenocorticotropin hormone concentrations as well as by thyrotropin releasing hormone stimulation testing (to determine PPID status). Results showed various relationships between inflammatory markers and the other variables measured. Most notably, docosadienoic acid (C22:2n6c), docosapentaenoic acid (C22:5n3c), and folate were positively associated with numerous inflammatory parameters (P ≤ 0.05). Although no relationships were found between inflamm-aging and PPID, being positive for PPID was negatively associated with vitamin B12 (P ≤ 0.01). No relationships between inflammation and body composition were found. Even within this senior horse population, age was associated with multiple parameters, particularly with numerous inflammatory cytokines and fatty acids. In summary, inflamm-aging exhibited relationships with various other parameters examined, particularly with certain fatty acids. This exploratory study provides insights into physiological changes associated with inflamm-aging in the senior horse.


Assuntos
Envelhecimento/imunologia , Composição Corporal , Doenças dos Cavalos/sangue , Inflamação , Doenças da Hipófise/veterinária , Adeno-Hipófise Parte Intermédia/patologia , Animais , Citocinas/sangue , Feminino , Ácido Fólico/sangue , Cavalos , Masculino , Nutrientes , Doenças da Hipófise/sangue
14.
Nutrients ; 12(2)2020 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-32019154

RESUMO

Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism associated with body fat accumulation could possibly trigger an inflammatory process by elevating homocysteine levels and increasing cytokine production, causing several diseases. This study aimed to evaluate the effects of food intervention, and not folate supplements, on the levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-1ß (IL-1ß) in overweight and obese women with the MTHFR C677T polymorphism. A randomized, double-blind eight-week clinical trial of 48 overweight and obese women was conducted. Participants were randomly assigned into two groups. They received 300 g of vegetables daily for eight weeks containing different doses of folate: 95 µg/day for Group 1 and 191 µg/day for Group 2. MTHFR C677T polymorphism genotyping was assessed by digestion with HinfI enzyme and on 12% polyacrylamide gels. Anthropometric measurements, 24-h dietary recall, and biochemical analysis (blood folic acid, vitamin B12, homocysteine (Hcy), TNF-α, IL-1ß, and IL-6) were determined at the beginning and end of the study. Group 2 had a significant increase in folate intake (p < 0.001) and plasma folic acid (p < 0.05) for individuals with the cytosine-cytosine (CC), cytosine-thymine (CT), and thymine-thymine (TT) genotypes. However, only individuals with the TT genotype presented reduced levels of Hcy, TNF-α, IL-6, and IL-1ß (p < 0.001). Group 1 showed significant differences in folate consumption (p < 0.001) and folic acid levels (p < 0.05) for individuals with the CT and TT genotypes. Food intervention with folate from vegetables increased folic acid levels and reduced interleukins, TNF-α, and Hcy levels, mainly for individuals with the TT genotype.


Assuntos
Ácido Fólico/administração & dosagem , Metilenotetra-Hidrofolato Redutase (NADPH2)/genética , Obesidade/genética , Sobrepeso/genética , Verduras , Adulto , Dieta/métodos , Inquéritos sobre Dietas , Método Duplo-Cego , Feminino , Ácido Fólico/sangue , Genótipo , Homocisteína/sangue , Humanos , Interleucina-1beta/sangue , Interleucina-6/sangue , Pessoa de Meia-Idade , Nutrigenômica , Obesidade/sangue , Obesidade/dietoterapia , Sobrepeso/sangue , Sobrepeso/dietoterapia , Polimorfismo Genético , Fator de Necrose Tumoral alfa/sangue , Vitamina B 12/sangue
15.
Pediatrics ; 145(3)2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32019814

RESUMO

BACKGROUND AND OBJECTIVES: Vitamin B12 and folate are important for normal brain development. Our objective for this study was to measure the effects of 6-month supplementation of vitamin B12 and/or folic acid in early childhood on cognition when the children were 6 to 9 years old. METHODS: The study is a follow-up of a factorial randomized, double-blind, placebo-controlled trial in 1000 North Indian children. Children 6 to 30 months of age were randomly assigned to receive a placebo or 1.8 µg of vitamin B12, 150 mg of folic acid, or both daily for 6 months. After 6 years, we re-enrolled 791 of these children for cognitive assessments. We compared the scores of the main outcomes (the Wechsler Intelligence Scale for Children, Fourth Edition [India], the Crichton Verbal Scale, and subtests of the NEPSY-II) between the study groups. We also measured the associations between markers of the B vitamins (plasma cobalamin, folate, and total homocysteine concentrations) in early childhood and the cognitive outcomes. RESULTS: There were no differences between the intervention groups and the placebo group on the cognitive outcomes. Plasma cobalamin, folate, and total homocysteine concentrations in early childhood were associated with the cognitive outcomes at follow-up in the unadjusted models. These associations disappeared in models adjusted for relevant confounders. CONCLUSIONS: Our findings, from both an observational and a randomized design suggest that vitamin B12 and folate in children 6 to 36 months have limited public health relevance for long-term cognition.


Assuntos
Desenvolvimento Infantil , Cognição , Ácido Fólico/administração & dosagem , Vitamina B 12/administração & dosagem , Complexo Vitamínico B/administração & dosagem , Criança , Método Duplo-Cego , Feminino , Ácido Fólico/sangue , Homocisteína/sangue , Humanos , Índia , Testes de Inteligência , Desenvolvimento da Linguagem , Masculino , Vitamina B 12/sangue
16.
Am J Clin Nutr ; 111(3): 635-643, 2020 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-31927564

RESUMO

BACKGROUND: The association between circulating folate concentrations and risk of coronary artery disease (CAD) has been evaluated in Western populations with inconsistent results; however, the observational and causal associations in Chinese populations with relatively low folate concentrations remain unclear. OBJECTIVES: We aimed to examine the association of circulating folate concentrations with incident CAD in Chinese adults, and further evaluated the causal relation using Mendelian randomization (MR) analysis. METHODS: We measured baseline serum folate in 1605 incident CAD cases and 1605 age- and sex-matched controls nested within the Dongfeng-Tongji (DFTJ) cohort, which recruited 27,009 individuals with a mean age of 63.6 y in 2008-2010 and followed up until the end of 2013 (mean: 4.4 y). We quantified the observational association between folate and incident CAD using conditional logistic regression models. A 2-sample MR analysis was performed using summary statistics obtained for genetic variants identified from a genome-wide association study (GWAS) of circulating folate concentrations in participants of European ancestry (n = 37,341) and from the CardiogramplusC4D 1000 genomes-based GWAS meta-analysis (n = 184,305). We also conducted 1-sample MR among 1545 incident CAD cases and 1444 controls with genotyping data in the DFTJ cohort. RESULTS: In the DFTJ cohort, higher serum folate concentrations were associated with a lower risk of CAD: the OR (95% CI) across sex-specific quartiles of folate (from lowest to highest concentrations) was 1.00 (reference), 0.78 (0.63, 0.97), 0.77 (0.61, 0.97), and 0.75 (0.60, 0.95), respectively (P-trend = 0.01). In the MR analysis, the OR of CAD per SD increase in genetically predicted serum folate was 0.99 (0.82, 1.20) and 0.88 (0.59, 1.32) for European and Chinese populations, respectively. CONCLUSIONS: We found an inverse association between circulating folate concentrations and incident CAD among Chinese populations. However, we confirmed that there was no genetic evidence to support the causal relation in both European and Chinese populations.


Assuntos
Doença da Artéria Coronariana/genética , Ácido Fólico/sangue , Adulto , Idoso , Grupo com Ancestrais do Continente Asiático/genética , China/epidemiologia , Doença da Artéria Coronariana/sangue , Doença da Artéria Coronariana/epidemiologia , Feminino , Humanos , Masculino , Análise da Randomização Mendeliana , Pessoa de Meia-Idade , Estudos Prospectivos
17.
Ann Hematol ; 99(3): 421-429, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31984437

RESUMO

ß-thalassemia major is one of the most common hematologic disorders in the world. It causes severe anemia and patients require regular blood transfusions, which causes different complications such as iron overload and alloimmunization. Regulatory T cells (Tregs) have an important role in regulation of immune responses. FoxP3 is the major marker of Tregs and its expression can be influenced by different factors. GDF-15 is another gene that plays a role in iron homeostasis and regulation of immune system in different diseases. The aim of this study was to assess the frequency of Tregs and FoxP3/GDF-15 gene expression in ß-thalassemia major patients with and without alloantibody as well as its correlation with different factors such as serum ferritin and folate levels. This study was conducted on 68 ß-thalassemia major patients with and without alloantibodies in comparison with 20 healthy individuals with matched age and sex as control group. Enzyme-linked immunosorbent assay (ELISA), flow cytometry, and real-time PCR were performed in order to evaluate serum ferritin and folate levels, frequency of Tregs, and the expression of FoxP3 and GDF-15 genes, respectively. The percentage and absolute count of Tregs were increased in patients compared with controls (P = 0.0003), but there was no difference between responders and non-responders (P > 0.05). The Tregs count correlated positively with serum ferritin. No correlation was observed between target genes and serum ferritin and folate, but there was a positive significant correlation between the expression of FoxP3 and GDF-15 genes, which shows the immunosuppressive role of GDF-15.


Assuntos
Ferritinas , Ácido Fólico , Fatores de Transcrição Forkhead , Regulação da Expressão Gênica/imunologia , Fator 15 de Diferenciação de Crescimento , Isoanticorpos , Linfócitos T Reguladores , Talassemia beta , Adolescente , Adulto , Criança , Feminino , Ferritinas/sangue , Ferritinas/imunologia , Ácido Fólico/sangue , Ácido Fólico/imunologia , Fatores de Transcrição Forkhead/biossíntese , Fatores de Transcrição Forkhead/imunologia , Fator 15 de Diferenciação de Crescimento/biossíntese , Fator 15 de Diferenciação de Crescimento/imunologia , Humanos , Isoanticorpos/sangue , Isoanticorpos/imunologia , Masculino , Linfócitos T Reguladores/imunologia , Linfócitos T Reguladores/metabolismo , Linfócitos T Reguladores/patologia , Talassemia beta/sangue , Talassemia beta/imunologia , Talassemia beta/patologia
18.
Biomed Pharmacother ; 122: 109654, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31918266

RESUMO

BACKGROUND: Folate deficiency has been long implicated in cancer development. Although the role of folate in preventing cervical cancer is still unclear, emerging evidence shows that microRNAs (miRs) have great influence on tumor cell migration and invasion. OBJECTIVES: The purpose of this study was to conduct an integrated analysis of miR expression in squamous cell carcinoma tissues with adequate or deficient serum folate. Further, study conducted tissue validation and functional analysis of miRs to uncover novel pathogenic mechanisms on the role of folate in squamous cell carcinoma (SCC). MATERIALS AND METHODS: miR expression profiles were obtained from five paired primary SCC tumors with sufficient or deficient serum folate levels through Affymetrix GeneChip microRNA 4.0. This was followed by an integrated bioinformatics analysis and expanded sample size to verify core miRs by molecular biological validation. HeLa and SiHa cells with different concentrations of folate were used to clarify the roles of miR-27a on cell proliferation, migration, and invasion. MiR-27a expression was measured by the quantitative real-time polymerase chain reaction. Cell counting proliferation, wound healing, and transwell invasion assays were used to determine cell survival, proliferation, migration, and invasion abilities, respectively. RESULTS: Our study found increasing miR-27a expression in serum of normal, high-grade squamous intraepithelial lesion (HSIL), and SCC tissues (in order of magnitude), which trend was negatively correlated with serum folate content. Further, there were significant differences in cellular miR-27a expression between 200 nM and 500 nM folate concentrations, with higher folate concentrations showing lower proliferation, migration, and invasion in SCC. Finally, miR-27a promoted proliferation and invasion in HeLa cells, whereas a miR-27a inhibitor blocked cell proliferation and invasion. CONCLUSION: There is a significant association between miR-27a expression and folate during cervical carcinoma progression. Therefore, miR-27a could be used as a new biomarker for SCC diagnosis and prediction, suggesting a new therapeutic strategy for SCC treatment.


Assuntos
Carcinoma/metabolismo , Ácido Fólico/farmacologia , MicroRNAs/efeitos dos fármacos , MicroRNAs/metabolismo , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Progressão da Doença , Feminino , Ácido Fólico/sangue , Regulação Neoplásica da Expressão Gênica , Redes Reguladoras de Genes , Células HeLa , Humanos , MicroRNAs/genética , Taxa de Sobrevida
19.
Support Care Cancer ; 28(9): 4235-4240, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31900617

RESUMO

PURPOSE: The value of testing for folate deficiency has been scrutinized recently given low prevalence of deficiency with widespread dietary fortification. Numerous studies have shown folate testing to be low yield overall. However, the value of such testing in the inpatient cancer population has not been defined. METHODS: We queried all folate tests performed during 2017 at our center on admitted cancer patients. We used diagnosis codes and manual chart review to assess risk factors for folate deficiency. Descriptive statistics were used to summarize characteristics of patients undergoing folate testing, the frequency of vitamin B12 co-testing, and repeat folate testing. Fisher's exact test was used to compare the proportion of deficient vs. not deficient tests based on the presence of risk factors. A Cox proportional hazards model was fit to examine the association between folate deficiency and survival. RESULTS: In total, 937 patients had 1065 tests performed during 2017. Among all tests, 7.0% indicated folate deficiency. In patients who underwent two folate tests in a single hospitalization, 89% were deficient neither instance. Risk factors for folate deficiency were equally common in instances with deficient compared with replete testing (25.3 vs. 20.4%, P = 0.334). Folate deficiency was associated with higher risk for death (HR 1.49, 95% CI 1.10-2.03, P = 0.01). CONCLUSION: Folate deficiency was present in 7% of hospitalized cancer patients and associated with shorter overall survival. Repeat testing in the same patient over time was low yield. Traditional risk factors for folate deficiency do not appear to apply in this patient population.


Assuntos
Deficiência de Ácido Fólico/diagnóstico , Ácido Fólico/sangue , Centros Médicos Acadêmicos/estatística & dados numéricos , Idoso , Dieta , Feminino , Deficiência de Ácido Fólico/sangue , Deficiência de Ácido Fólico/epidemiologia , Deficiência de Ácido Fólico/mortalidade , Humanos , Pacientes Internados/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Prevalência , Modelos de Riscos Proporcionais , Fatores de Risco , Vitamina B 12/análise
20.
Neurology ; 94(11): e1126-e1136, 2020 03 17.
Artigo em Inglês | MEDLINE | ID: mdl-31932513

RESUMO

OBJECTIVE: We evaluated the interaction of serum folate and vitamin B12 with methylenetetrahydrofolate reductase (MTHFR) C677T genotypes on the risk of first ischemic stroke and on the efficacy of folic acid treatment in prevention of first ischemic stroke. METHODS: A total of 20,702 hypertensive adults were randomized to a double-blind treatment of daily enalapril 10 mg and folic acid 0.8 mg or enalapril 10 mg alone. Participants were followed up every 3 months. RESULTS: Median values of folate and B12 concentrations at baseline were 8.1 ng/mL and 280.2 pmol/L, respectively. Over a median of 4.5 years, among those not receiving folic acid, participants with baseline serum B12 or serum folate above the median had a significantly lower risk of first ischemic stroke (hazard ratio [HR], 0.74; 95% confidence interval [CI], 0.57-0.96), especially in those with MTHFR 677 CC genotype (wild-type) (HR, 0.49; 95% CI, 0.31-0.78). Folic acid treatment significantly reduced the risk of first ischemic stroke in participants with both folate and B12 below the median (2.3% in enalapril-folic acid group vs 3.6% in enalapril-only group; HR, 0.62; 95% CI, 0.46-0.86), particularly in MTHFR 677 CC carriers (1.6% vs 4.9%; HR, 0.24; 95% CI, 0.11-0.55). However, TT homozygotes responded better with both folate and B12 levels above the median (HR, 0.28; 95% CI, 0.10-0.75). CONCLUSIONS: The risk of first ischemic stroke was significantly higher in hypertensive patients with low levels of both folate and B12. Effect of folic acid treatment was greatest in patients with low folate and B12 with the CC genotype, and with high folate and B12 with the TT genotype.


Assuntos
Ácido Fólico/uso terapêutico , Metilenotetra-Hidrofolato Redutase (NADPH2)/genética , Acidente Vascular Cerebral/sangue , Acidente Vascular Cerebral/genética , Acidente Vascular Cerebral/prevenção & controle , Idoso , Anti-Hipertensivos/uso terapêutico , Método Duplo-Cego , Enalapril/uso terapêutico , Feminino , Ácido Fólico/sangue , Genótipo , Humanos , Hipertensão/sangue , Hipertensão/complicações , Hipertensão/genética , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , Vitamina B 12/sangue
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