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de Moraes RCM, Lima GCA, Cardinali CAEF, Gonçalves AC, Portari GV, Guerra-Shinohara EM, Leboucher A, Júnior JD, Kleinridders A, da Silva Torrão A. Benfotiamine protects against hypothalamic dysfunction in a STZ-induced model of neurodegeneration in rats. Life Sci 2022; 306:120841. [PMID: 35907494 DOI: 10.1016/j.lfs.2022.120841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/13/2022] [Accepted: 07/22/2022] [Indexed: 10/16/2022]
Abstract
The neurodegeneration of Alzheimer's disease (AD) affects not only brain structures associate with cognition early in the progression of the disease, but other areas such as the hypothalamus, a region involved in the control of metabolism and appetite. In this context, we evaluated the effects of benfotiamine (BFT), a vitamin B1 analog that is being proposed as a therapeutical approach for AD-related cognitive alterations, which were induced by intracerebroventricular injection of streptozotocin (STZ). In addition to the already described effect of STZ on cognition, we show that this drug also causes metabolic changes which are linked to changes in hypothalamic insulin signaling and orexigenic and anorexigenic circuitries, as well as a decreased cellular integrated stress response. As expected, the supplementation with 150 mg/kg of BFT for 30 days increased blood concentrations of thiamine and its phosphate esters. This led to the prevention of body weight and fat loss in STZ-ICV-treated animals. In addition, we also found an improvement in food consumption, despite hypothalamic gene expression linked to anorexia after STZ exposure. Additionally, decreased apoptosis signaling was observed in the hypothalamus. In in vitro experiments, we noticed a high ability of BFT to increase insulin sensitivity in hypothalamic neurons. Furthermore, we also observed that BFT decreases the mitochondrial unfolded stress response damage by preventing the loss of HSP60 and reversed the mitochondria dysfunction caused by STZ. Taken together, these results suggest that benfotiamine treatment is a potential therapeutic approach in the treatment of hypothalamic dysfunction and metabolic disturbances associated with sporadic AD.
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Affiliation(s)
- Ruan Carlos Macêdo de Moraes
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil; Central Regulation of Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Germany.
| | | | | | - Alisson Carvalho Gonçalves
- Federal Institute of Education, Science and Technology Goiano, Urutaí, GO, Brazil; Laboratory of Experimental Nutrition, Institute of Health Sciences, Federal University of Triângulo Mineiro, Brazil
| | - Guilherme Vannucchi Portari
- Laboratory of Experimental Nutrition, Institute of Health Sciences, Federal University of Triângulo Mineiro, Brazil
| | - Elvira Maria Guerra-Shinohara
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Brazil; Faculty of Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Brazil
| | - Antoine Leboucher
- Central Regulation of Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Germany
| | - José Donato Júnior
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
| | - André Kleinridders
- Central Regulation of Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke, Germany; Institute of Nutritional Science, Department of Molecular and Experimental Nutritional Medicine, University of Potsdam, Germany
| | - Andréa da Silva Torrão
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
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Ferreira CM, de Vasconcelos-Pereira EF, de Oliveira VM, Salgado PR, Domingos JA, Monreal MTFD, Guerra-Shinohara EM, Gubert VT. Hepatotoxicity associated with the use of teriflunomide in a patient with multiple sclerosis: A case report. Medicine (Baltimore) 2021; 100:e28246. [PMID: 34941096 PMCID: PMC8701948 DOI: 10.1097/md.0000000000028246] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 11/25/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Teriflunomide is an inhibitor of pyrimidine synthesis available as a first-line treatment for relapsing-remitting multiple sclerosis. Drug-induced liver damage is a relevant problem in clinical practice, representing a frequent cause of treatment discontinuation. This case report describes the occurrence of liver injury, with a 33.7-fold increase in the upper limit of normality of the liver enzyme alanine aminotransferase during treatment with teriflunomide 14 mg. PATIENT CONCERN A 44-year-old woman receiving teriflunomide 14 mg for the treatment of multiple sclerosis presented symptoms suggestive of liver dysfunction 54 days after starting treatment. The patient had no history of using disease-modifying therapy, neither previous liver disease nor other comorbidities. DIAGNOSTICS The suggested diagnosis was drug-induced liver injury, classified as hepatocellular. Other possible hepatic and autoimmune etiologies were ruled out. INTERVENTIONS Replacement of teriflunomide treatment with glatiramer acetate and follow-up of the disease. OUTCOMES Signs and symptoms regressed after treatment with teriflunomide 14 mg was discontinued, with normalization of liver enzyme activity in ∼5 months. The causality assessment of the adverse drug reaction was determined by the Naranjo scaling system, resulting in probable, with a final score of 7. CONCLUSIONS Teriflunomide-induced liver injury in patients with multiple sclerosis is a serious adverse reaction. The report of this case contributes to updating knowledge about the safety aspects of treatment with teriflunomide and planning of monitoring strategies and patient risk management.
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Affiliation(s)
- Cristiane Munaretto Ferreira
- Pharmacy Post-Graduation Program, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
- Pharmacy School Profª Ana Maria Cervantes Baraza, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - Erica Freire de Vasconcelos-Pereira
- Pharmacy School Profª Ana Maria Cervantes Baraza, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - Vanessa Marcon de Oliveira
- Pharmacy School Profª Ana Maria Cervantes Baraza, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - Pedro Rippel Salgado
- Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - João Américo Domingos
- Faculty of Medicine, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - Maria Tereza Ferreira Duenhas Monreal
- Pharmacy School Profª Ana Maria Cervantes Baraza, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - Elvira Maria Guerra-Shinohara
- Pharmacy Post-Graduation Program, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
| | - Vanessa Terezinha Gubert
- Pharmacy Post-Graduation Program, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
- Pharmacy School Profª Ana Maria Cervantes Baraza, Faculty Pharmaceutical Sciences, Food and Nutrition, Federal University of Mato Grosso do Sul, Campo Grande – MS, Brazil
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Biassi TP, Guerra-Shinohara EM, Moretti PNS, de Freitas Dutra V, Cabañas-Pedro AC, Mecabo G, Colleoni GWB, Figueiredo MS. miRNA profile and disease severity in patients with sickle cell anemia. Ann Hematol 2021; 101:27-34. [PMID: 34677646 DOI: 10.1007/s00277-021-04665-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 09/12/2021] [Indexed: 11/26/2022]
Abstract
Identification of biomarkers associated with severity in sickle cell anemia is desirable. Circulating serum microRNAs (miRNA) are targets studied as diagnostic or prognostic markers, but few studies have been conducted in sickle cell anemia. The purpose of this study is to identify specific signatures of miRNAs in plasma samples from sickle cell anemia patients according to severity indexes. Screening of the miRNAs expression was performed in 8 patients, classified by tricuspid regurgitation velocity (TRV) measure: 4 with TRV ≥ 2.5 m/s and 4 with TRV < 2.5 m/s. The samples were analyzed by real-time PCR using Megaplex RT Human Pool A and Pool B comprising 667 distinct miRNAs. Seventeen miRNAs were differentially expressed between the two groups (p < 0.05). Five differentially expressed miRNAs (miR15b, miR502, miR510, miR544, miR629) were selected for validation in a cohort of 52 patient samples, 26 with TRV ≥ 2.5 m/s. Another two severity scores were also used: organ injury score (OIS) and Bayesian score (BS). Univariate binary logistic regressions were performed to analyze the data. Five out of 17 differentially expressed miRNAs were selected for validation in 52 patient samples: miR15b, miR502, miR510, miR544, and miR629. Two miRNAs (miR510 and miR629) were significantly decreased in cases of greater severity. Whereas miR510 expression discriminated the patients according to TRV and OIS, miR629 expression did it according to BS. This is the first study investigating plasma miRNAs as possible biomarkers for SCA severity. Our data suggest that low levels of miR510 and miR629 expression are associated with greater SCA disease severity. Further studies are still necessary to elucidate mechanism of these miRNAs and their related proteins.
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Affiliation(s)
- Thaís Priscila Biassi
- Hematology and Blood Transfusion Division, Universidade Federal de São Paulo UNIFESP, Sao Paulo, Brazil.
| | | | | | - Valeria de Freitas Dutra
- Hematology and Blood Transfusion Division, Universidade Federal de São Paulo UNIFESP, Sao Paulo, Brazil
| | | | - Grazielle Mecabo
- Hematology and Blood Transfusion Division, Universidade Federal de São Paulo UNIFESP, Sao Paulo, Brazil
| | | | - Maria Stella Figueiredo
- Hematology and Blood Transfusion Division, Universidade Federal de São Paulo UNIFESP, Sao Paulo, Brazil
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Didone TVN, Borelli P, Casari PBB, Souza RRD, Jorge TR, Guerra-Shinohara EM. Appropriate knowledge of the indications for medications in use among older individuals assisted in the Jornada Científica dos Acadêmicos de Farmácia-Bioquímica. BRAZ J PHARM SCI 2021. [DOI: 10.1590/s2175-97902020000419043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | | | - Elvira Maria Guerra-Shinohara
- Federal University of Sao Paulo, Brazil; University of Sao Paulo, Brazil; Federal University of Mato Grosso do Sul, Brazil
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Paniz C, Lucena MR, Bertinato JF, Dos Santos MNN, Gomes GW, Figueiredo MS, Sonati MDF, Blaia-D Avila VLN, Green R, Guerra-Shinohara EM. Serum folate and cytokines in heterozygous β-thalassemia. Int J Lab Hematol 2020; 42:718-726. [PMID: 32662566 DOI: 10.1111/ijlh.13287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Folate deficiency is commonly reported in β-thalassemia. Individuals heterozygous for β-thalassemia may have higher folate requirements than normal individuals. OBJECTIVES To document the concentration of serum total folate and its forms in β-thalassemia heterozygote users (β-TmU) and nonusers (β-TmN) of 5 mg folic acid/d; to determine whether folic acid (FA) consumption from fortified foods allows beta-Tm patients, who do not take FA supplements, to meet their dietary folate requirements; and to investigate the association between higher serum unmetabolized folic acid (UMFA) and inflammatory cytokine concentrations. METHODS Serum total folate and forms were measured in 42 β-Tm (13 β-TmU and 29 β-TmN) and 84 healthy controls. The mononuclear leucocyte mRNA expression of relevant genes and their products and hematological profiles were determined. RESULTS β-TmU had higher serum total folate, 5-methyltetrahydrofolate, UMFA, and tetrahydrofolate (THF) compared with β-TmN. The β-TmN had lower serum total folate and THF than controls. Plasma total homocysteine (tHcy) was lower in β-TmU compared with both β-TmN and controls, while β-TmN had higher tHcy than controls. β-TmU had higher IL-8 than their controls while β-TmN had higher IL-6 and IL-8 than their controls. β-TmU have higher levels of serum total folate, 5- methyltetrahydrofolate, UMFA, and THF than controls. There was no association between UMFA concentrations and cytokine levels. CONCLUSIONS Mandatory flour fortification with FA in Brazil may be insufficient for β-TmN, since they have higher tHcy and lower serum total folate than controls. Furthermore, β-TmN have higher IL-6 levels than β-TmU. UMFA was not associated with inflammatory cytokine levels.
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Affiliation(s)
- Clóvis Paniz
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil.,Departamento de Análises Clínicas e Toxicológicas, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Maylla Rodrigues Lucena
- Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Juliano Felix Bertinato
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | | | - Guilherme Wataru Gomes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil
| | - Maria Stella Figueiredo
- Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Maria de Fátima Sonati
- Departamento de Patologia Clínica, Faculdade de Ciências Médicas, Universidade de Campinas, São Paulo, Brazil
| | | | - Ralph Green
- Department of Pathology and Laboratory Medicine, UC Davis School of Medicine, Sacramento, CA, USA
| | - Elvira Maria Guerra-Shinohara
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brazil.,Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil.,Faculdade e Ciências Farmacêuticas, Alimentos e Nutrição, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
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6
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Paniz C, Lucena MR, Bertinato JF, Lourenço FR, Barros BCA, Gomes GW, Figueiredo MS, Cançado RD, Blaia-D Avila VLN, Pfeiffer CM, Fazili Z, Green R, Carvalho VM, Guerra-Shinohara EM. Daily supplementation with 5 mg of folic acid in Brazilian patients with hereditary spherocytosis. J Investig Med 2019; 67:1110-1117. [PMID: 31076457 DOI: 10.1136/jim-2019-001025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/03/2019] [Indexed: 01/08/2023]
Abstract
Patients with hereditary spherocytosis (HS) have increased rates of erythropoiesis and higher folate requirements. In a case-control study of patients with HS, we evaluated the associations between the use of 5 mg folic acid (FA) daily and serum concentrations of folate, unmetabolized folic acid (UMFA), interleukin (IL)-6, IL-8, IL-10, interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α); and mRNA expression of dihydrofolate reductase (DHFR), methylene tetrahydrofolate reductase (MTHFR), IL8, IFNG and TNFA genes. Total serum folate and folate forms were measured in 27 patients with HS (21 users [HS-U] and 6 non-users [HS-NU] of supplemental FA) and 54 healthy controls not consuming 5 mg/day supplemental FA. Each patient was matched to two controls based on age, sex and body mass index. The mononuclear leucocyte mRNA expression of relevant genes and their products were determined. Serum folate, UMFA, 5-methyl-tetrahydrofolate (5-methyl-THF) and tetrahydrofolate (THF) concentrations were significantly higher in HS-U compared with matched healthy controls (p<0.001, n=42). HS-NU had lower serum folate concentrations than matched healthy controls (p=0.044, n=12). HS-U and HS-NU presented similar hematological and biochemical markers profiles. No differences were found between HS-U and HS-NU for cytokine serum concentrations and mRNA expression genes. DHFR mRNA expression was higher in HS-U than in HS-NU. The use of high daily doses of FA for treatment of patients with HS may be excessive and is associated with elevated serum UMFA and elevated DHFR mRNA expression. It is not known whether long-term high-dose FA use by patients with HS might have adverse health effects.
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Affiliation(s)
- Clóvis Paniz
- Análises Clínicas e Toxicológicas, Universidade de São Paulo, São Paulo, Brazil
| | - Maylla Rodrigues Lucena
- Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | - Bruna Cipriano A Barros
- Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Maria Stella Figueiredo
- Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Rodolfo Delfini Cançado
- Seção de Hematologia e Oncologia, Faculdade de Medicina da Santa Casa de São Paulo, São Paulo, Brazil
| | | | | | - Zia Fazili
- CDC, National Center for Environment Health, Atlanta, Georgia, USA
| | - Ralph Green
- Pathology and Laboratory Medicine, UC Davis School of Medicine, Sacramento, California, USA
| | | | - Elvira Maria Guerra-Shinohara
- Análises Clínicas e Toxicológicas, Universidade de São Paulo, São Paulo, Brazil.,Disciplina de Hematologia e Hemoterapia, Universidade Federal de São Paulo, São Paulo, Brazil
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7
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Palchetti CZ, Paniz C, de Carli E, Marchioni DM, Colli C, Steluti J, Pfeiffer CM, Fazili Z, Guerra-Shinohara EM. Association between Serum Unmetabolized Folic Acid Concentrations and Folic Acid from Fortified Foods. J Am Coll Nutr 2017; 36:572-578. [PMID: 28895788 DOI: 10.1080/07315724.2017.1333929] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE To investigate the association between serum unmetabolized folic acid (UMFA) concentrations and folic acid from fortified foods and nutrients known as dietary methyl-group donors (folate, methionine, choline, betaine and vitamins B2, B6 and B12) in participants exposed to mandatory fortification of wheat and maize flours with folic acid. METHODS Cross-sectional study carried out with 144 healthy Brazilian participants, both sexes, supplement nonusers. Serum folate, UMFA, vitamin B12 and total plasma homocysteine (tHcy) were biochemically measured. Dietary intake was assessed by 2 non-consecutive 24-hour dietary recalls (24-HRs) and deattenuated energy-adjusted nutrient data were used for statistical analysis. RESULTS Ninety eight (68.1%) participants were women. Median (interquartile range) age was 35.5 (28.0-52.0) years. Elevated serum folate concentrations (>45 nmol/L) were found in 17 (11.8%), while folate deficiency (<7 nmol/L) in 10 (6.9%) participants. No one had vitamin B12 deficiency (<148 pmol/L). An elevated serum UMFA concentration was defined as > 1 nmol/L (90th percentile). UMFA concentrations were positively correlated with folic acid intake and negatively correlated to choline, methionine and vitamin B6 intakes. Participants in the lowest quartile of UMFA concentrations had lower dietary intake of total folate (DFEs) and folic acid, and higher dietary intake of methionine, choline and vitamin B6 than participants in the highest quartile of UMFA. Folic acid intake (OR [95% CI] = 1.02 [1.01-1.04)] and being a male (OR [95% CI] = 0.40 [0.19-0.87) were associated with increased and reduced odds for UMFA concentrations > 0.55 nmol/L (median values), respectively. CONCLUSION UMFA concentrations were directly influenced by folic acid intake from fortified foods in a healthy convenience sample of adult Brazilians exposed to mandatory flour fortification with folic acid.
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Affiliation(s)
- Cecília Zanin Palchetti
- a Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Clóvis Paniz
- a Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Eduardo de Carli
- b Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Dirce M Marchioni
- c Department of Nutrition, School of Public Health , University of São Paulo , São Paulo , Brazil
| | - Célia Colli
- b Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
| | - Josiane Steluti
- c Department of Nutrition, School of Public Health , University of São Paulo , São Paulo , Brazil
| | - Christine M Pfeiffer
- d National Center for Environmental Health , Centers for Disease Control and Prevention , Atlanta , Georgia , USA
| | - Zia Fazili
- d National Center for Environmental Health , Centers for Disease Control and Prevention , Atlanta , Georgia , USA
| | - Elvira Maria Guerra-Shinohara
- a Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences , University of São Paulo , São Paulo , Brazil
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Paniz C, Bertinato JF, Lucena MR, De Carli E, Amorim PMDS, Gomes GW, Palchetti CZ, Figueiredo MS, Pfeiffer CM, Fazili Z, Green R, Guerra-Shinohara EM. A Daily Dose of 5 mg Folic Acid for 90 Days Is Associated with Increased Serum Unmetabolized Folic Acid and Reduced Natural Killer Cell Cytotoxicity in Healthy Brazilian Adults. J Nutr 2017; 147:1677-1685. [PMID: 28724658 PMCID: PMC5712455 DOI: 10.3945/jn.117.247445] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 04/25/2017] [Accepted: 06/15/2017] [Indexed: 01/01/2023] Open
Abstract
Background: The effects of high-dose folic acid (FA) supplementation in healthy individuals on blood folate concentrations and immune response are unknown.Objective: The aim of the study was to evaluate the effects of daily consumption of a tablet containing 5 mg FA on serum folate; number and cytotoxicity of natural killer (NK) cells; mRNA expression of dihydrofolate reductase (DHFR), methylenetetrahydrofolate reductase (MTHFR), interferon γ (IFNG), tumor necrosis factor α (TNFA), and interleukin 8 (IL8) genes; and concentrations of serum inflammatory markers.Methods: This prospective clinical trial was conducted in 30 healthy Brazilian adults (15 women), aged 27.7 y (95% CI: 26.4, 29.1 y), with a body mass index (in kg/m2) of 23.1 (95% CI: 22.0, 24.3). Blood was collected at baseline and after 45 and 90 d of the intervention. Serum folate concentrations were measured by microbiological assay and HPLC-tandem mass spectrometry [folate forms, including unmetabolized folic acid (UMFA)]. We used real-time polymerase chain reaction to assess mononuclear leukocyte mRNA expression and flow cytometry to measure the number and cytotoxicity of NK cells.Results: Serum folate concentrations increased by ∼5-fold after the intervention (P < 0.001), and UMFA concentrations increased by 11.9- and 5.9-fold at 45 and 90 d, respectively, when compared with baseline (P < 0.001). UMFA concentrations increased (>1.12 nmol/L) in 29 (96.6%) participants at day 45 and in 26 (86.7%) participants at day 90. We observed significant reductions in the number (P < 0.001) and cytotoxicity (P = 0.003) of NK cells after 45 and 90 d. Compared with baseline, DHFR mRNA expression was higher at 90 d (P = 0.006) and IL8 and TNFA mRNA expressions were higher at 45 and 90 d (P = 0.001 for both).Conclusion: This noncontrolled intervention showed that healthy adults responded to a high-dose FA supplement with increased UMFA concentrations, changes in cytokine mRNA expression, and reduced number and cytotoxicity of NK cells. This trial was registered at www.ensaiosclinicos.gov.br as RBR-2pr7zp.
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Affiliation(s)
- Clovis Paniz
- Departments of Clinical and Toxicological Analysis and
| | | | - Maylla Rodrigues Lucena
- Hematology and Blood Transfusion Division, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Eduardo De Carli
- Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | | | | | | | - Maria Stella Figueiredo
- Hematology and Blood Transfusion Division, Federal University of Sao Paulo, Sao Paulo, Brazil
| | | | - Zia Fazili
- National Center for Environmental Health, CDC, Atlanta, GA; and
| | - Ralph Green
- Department of Pathology and Laboratory Medicine, UC Davis School of Medicine, Sacramento, CA
| | - Elvira Maria Guerra-Shinohara
- Departments of Clinical and Toxicological Analysis and
- Hematology and Blood Transfusion Division, Federal University of Sao Paulo, Sao Paulo, Brazil
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Nunes DPT, Lima LTD, Chauffaille MDL, Mitne-Neto M, Santos MTD, Cliquet MG, Guerra-Shinohara EM. CALR mutations screening in wild type JAK2(V617F) and MPL(W515K/L) Brazilian myeloproliferative neoplasm patients. Blood Cells Mol Dis 2015; 55:236-40. [PMID: 26227853 DOI: 10.1016/j.bcmd.2015.07.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 07/07/2015] [Accepted: 07/08/2015] [Indexed: 01/31/2023]
Abstract
Some myeloproliferative neoplasm (MPN) patients harbor JAK2(V617F) mutation, and CALR mutations were recently discovered in wild type (WT) JAK2(V617F). We evaluated the frequency and type of CALR mutations, and clinical and hematological characteristics in WT JAK2(V617F) and MPL(W515K/L) MPN patients. Sixty-five patients were included: 21 with primary myelofibrosis (PMF), 21 with myelofibrosis post-essential thrombocythemia (MPET) and 23 with essential thrombocythemia (ET). Screening for JAK2(V617F) and MPL(W515K/L) were performed using real-time PCR, while CALR mutations were analyzed by fragment analysis and Sanger sequencing. JAK2(V617F) was the most frequent mutation (54.5%) and one patient (1.5%) harbored MPL(W515L). CALR mutations were present in 38.1% of PMF, 12.5% of ET and 33.3% of MPET patients. Five types of CALR mutations were detected, among which type 1 (32.1%) and type 2 (21.4%) were found to be the most common. A novel CALR mutation in a PMF patient was found. Patients carrying CALR mutations had higher platelet count and less presence of splenomegaly than JAK2(V617F), while triple negatives had higher C-reactive protein levels than CALR mutant carriers. Screening for CALR mutations and its correlation with clinical features could be useful for the characterization of MPN patients and result in its incorporation into a new prognostic score.
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Affiliation(s)
- Daniela Prudente Teixeira Nunes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | - Luciene Terezina de Lima
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | | | | | | | - Marcelo Gil Cliquet
- Departamento de Hematologia, Complexo Hospitalar de Sorocaba, Universidade Católica de São Paulo, Sorocaba, São Paulo, Brazil
| | - Elvira Maria Guerra-Shinohara
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil.
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de Lima LT, Bueno CT, Vivona D, Hirata RDC, Hirata MH, Hungria VTDM, Chiattone CS, Zanichelli MA, Chauffaille MDLLF, Guerra-Shinohara EM. Relationship between SLCO1B3 and ABCA3 polymorphisms and imatinib response in chronic myeloid leukemia patients. ACTA ACUST UNITED AC 2014; 20:137-42. [PMID: 25056761 DOI: 10.1179/1607845414y.0000000181] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Genetic variations in membrane transporters may contribute to imatinib mesylate (IM) resistance in chronic myeloid leukemia (CML). Objective To investigate the relationship between SLCO1B3, SLCO1A2, and ABCA3 polymorphisms and IM response in CML patients. METHODS Patients in chronic phase CML (N = 118) were studied. All patients were treated with a standard dose of IM (400 mg/day) and classified into one of the two groups according to their responses. Major molecular response (MMR) and complete molecular response (CMR) were evaluated. Criteria for response failure were established according to European LeukemiaNet (2009). Analysis of the SLCO1B3 c.334T > G (rs4149117) and c.699G > A (rs7311358), SLCO1A2 c.516A > C (rs11568563) and c.-62-361G > A (rs3764043), and ABCA3 c.1755C > G (rs323043) and c.4548-191C > A (rs150929) polymorphisms was carried out by real-time polymerase chain reaction. RESULTS SLCO1A2 and ABCA3 polymorphisms have similar frequencies between responders and non-responders. SLCO1B3 699GG and 344TT genotypes were more frequent in the responder group (63.8%) than in the non-responder group (44.7%, P = 0.042). Furthermore, carriers of 699GA/AA and 334TG/GG genotypes presented a higher probability of not responding to the standard dose of IM (odds ratio: 2.17; 95% confidence interval: 1.02-4.64, P = 0.04). Poor CMR for ABCA3 4548-91C > A was observed in patients with the CC/CA genotype when compared to AA carriers in the responder group (P = 0.014). CONCLUSIONS SLCO1B3 699GG and 344TT genotypes are associated with non-response to IM, while ABCA3 4548-91 CC/CA genotypes are related to poor CMR in CML patients treated with standard-dose imatinib.
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MESH Headings
- ATP-Binding Cassette Transporters/genetics
- Adult
- Alleles
- Antineoplastic Agents/therapeutic use
- Female
- Fusion Proteins, bcr-abl/genetics
- Gene Frequency
- Genotype
- Humans
- Imatinib Mesylate/therapeutic use
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/diagnosis
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/mortality
- Leukemia, Myeloid, Chronic-Phase/drug therapy
- Leukemia, Myeloid, Chronic-Phase/genetics
- Male
- Middle Aged
- Organic Anion Transporters/genetics
- Organic Anion Transporters, Sodium-Independent/genetics
- Polymorphism, Genetic
- Polymorphism, Single Nucleotide
- Protein Kinase Inhibitors/therapeutic use
- Solute Carrier Organic Anion Transporter Family Member 1B3
- Treatment Outcome
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Vivona D, Lima LT, Rodrigues AC, Bueno CT, Alcantara GKS, Barros LSR, DE Moraes Hungria VT, Chiattone CS, DE Lourdes Lopes Ferrari Chauffaille M, Guerra-Shinohara EM. ABCB1 haplotypes are associated with P-gp activity and affect a major molecular response in chronic myeloid leukemia patients treated with a standard dose of imatinib. Oncol Lett 2014; 7:1313-1319. [PMID: 24660038 PMCID: PMC3961201 DOI: 10.3892/ol.2014.1857] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 01/30/2014] [Indexed: 12/27/2022] Open
Abstract
Despite the high efficacy of imatinib mesylate (IM) treatment for chronic myeloid leukemia (CML) patients, some individuals develop resistance due to impaired bioavailability. It has been previously demonstrated that the haplotypes for ATP-binding cassette subfamily B member 1 (ABCB1)with c.1236C>T, c.3435C>T and c.2677G>T/A polymorphisms markedly affect the secondary structure of ABCB1 mRNA and its activity. These modifications may affect efflux transporter activity and response to treatment with IM. The aim of the present study was to investigate the influence of ABCB1 haplotypes on P-glycoprotein (P-gp) activity, IM plasma levels and IM response. In total, 28 chronic-phase CML patients treated with a standard dose of IM (400 mg/day) were studied. The patients were selected according to the haplotypes of ABCB1, with c.1236C>T, c.3435C>T and c.2677G>T polymorphisms, and were classified into two groups based on the presence of the mutated allele in each genotype for the three ABCB1 polymorphisms. In addition, expression of P-gp and breakpoint cluster region-abelson 1 (BCR-ABL1), ABCB1 and solute carrier family 22 member 1 (SLC22A1) mRNA were evaluated. The P-gp activity in the wild-type group was found to be higher than that in the mutated group (59.1 vs. 38.3%; P=0.001). Furthermore, the patients who did not achieve major molecular response (MMR) showed a higher rate of efflux mediated by P-gp when compared with individuals who achieved MMR (64.7 vs. 45.7%; P=0.001). All patients without MMR demonstrated effluxes of >60%. In addition, patients without MMR exhibited lower plasma concentrations of IM compared with those with MMR (0.51 vs. 1.42 μg/ml; P=0.001). Higher levels of SLC22A1 mRNA were observed in patients who achieved MMR and complete molecular response (P<0.05). In conclusion, the ABCB1 1236CT/3435CT/2677GT and 1236TT/3435TT/2677TT haplotypes are associated with reduced P-gp activity and MMR in chronic-phase CML patients treated with a standard dose of IM.
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Affiliation(s)
- Douglas Vivona
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Science, University of São Paulo, São Paulo 05508-900, Brazil
| | - Luciene Terezina Lima
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Science, University of São Paulo, São Paulo 05508-900, Brazil
| | - Alice Cristina Rodrigues
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo 05508-900, Brazil
| | - Carolina Tosin Bueno
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Science, University of São Paulo, São Paulo 05508-900, Brazil
| | - Greyce Kelly Steinhorst Alcantara
- Department of Clinical, Toxicological and Bromatological Analyses, Faculty of Pharmaceutical Science, University of São Paulo, Ribeirão Preto 14040-903, Brazil
| | - Luiza Saldanha Ribeiro Barros
- Department of Clinical, Toxicological and Bromatological Analyses, Faculty of Pharmaceutical Science, University of São Paulo, Ribeirão Preto 14040-903, Brazil
| | | | - Carlos Sérgio Chiattone
- Department of Hematology and Hemotherapy, Santa Casa Medical School, São Paulo 01223-001, Brazil
| | | | - Elvira Maria Guerra-Shinohara
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Science, University of São Paulo, São Paulo 05508-900, Brazil
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12
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Santos PCJL, Soares RAG, Krieger JE, Guerra-Shinohara EM, Pereira AC. Genotyping of the hemochromatosis HFE p.H63D and p.C282Y mutations by high-resolution melting with the Rotor-Gene 6000® instrument. Clin Chem Lab Med 2011; 49:1633-6. [PMID: 21679129 DOI: 10.1515/cclm.2011.654] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND The genotyping of HFE p.C282Y and p.H63D mutations is one of the most requested molecular analyses in the laboratorial routine. In this scenario, the main aim was to develop a genotyping assay that has advantages compared to other methods. METHODS Genotypes for the HFE p.C282Y (c.G845A; rs1800562) and p.H63D (c.C187G, rs1799945) mutations were assessed by polymerase chain reaction (PCR) followed by high resolution melting (HRM) analysis with the Rotor-Gene 6000(®) instrument. Validation studies were conducted in samples bi-directionally sequenced. RESULTS The melting assay was developed in a unique procedure and to ensure the result in approximately 112 min (31 min for sample preparation and 81 min for the PCR-HRM step). Genotypes for the HFE p.C282Y mutation were easily distinguished in the region of 80-86°C. For the HFE p.H63D, genotypes were also easily distinguished in the region of 76-82°C, but using the addition of known wild-type genotype DNA in all unknown samples plus a reaction without addition. In validation, genotypes were 100% concordant between methods. CONCLUSIONS Our genotyping assay with the Rotor-Gene 6000(®) instrument applies to the laboratorial routine with several advantages, especially in large-scale demand. The main advantages were the non-dependence on gel electrophoresis and on mutagenic reagents for visualization of fragments, reduction of the chances for contamination due to sample preparation, the lack of use of probe-based methods and cost-effectiveness.
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Affiliation(s)
- Paulo Caleb Junior Lima Santos
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School, SP, Brazil
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13
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Terada CT, Santos PCJL, Cançado RD, Rostelato S, Lopreato FR, Chiattone CS, Guerra-Shinohara EM. Iron deficiency and frequency of HFE C282Y gene mutation in Brazilian blood donors. Transfus Med 2009; 19:245-51. [PMID: 19747287 DOI: 10.1111/j.1365-3148.2009.00944.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Limited data are available about iron deficiency (ID) in Brazilian blood donors. This study evaluated the frequencies of ID and iron-deficiency anaemia (IDA) separately and according to frequency of blood donations. The protective effect of the heterozygous genotype for HFE C282Y mutation against ID and IDA in female blood donors was also determined. Five hundred and eight blood donors were recruited at the Blood Bank of Santa Casa in Sao Paulo, Brazil. Haemoglobin and serum ferritin concentrations were measured. The genotype for HFE C282Y mutation was determined by polymerase chain reaction followed by restriction fragment length polymorphism analysis. The ID was found in 21.1% of the women and 2.6% of the men whereas the IDA was found in 6.8 and 0.3%, respectively. The ID was found in 11.9% of the women in group 1 (first-time blood donors) and the frequency increased to 38.9% in women of the group 3 (blood donors donating once or more times in the last 12 months). No ID was found in men from group 1; however the ID frequency increased to 0.9% in group 2 (who had donated blood before but not in the last 12 months) and 5.0% in group 3. In summary, the heterozygous genotype was not associated with reduction of ID or IDA frequencies in both genders, but in male blood donors it was associated with a trend to elevated ferritin levels (P = 0.060). ID is most frequent in Brazilian women but was also found in men of group 3.
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Affiliation(s)
- C T Terada
- Department of Clinical Chemistry and Toxicology, School of Pharmaceutical Sciences, University of Sao Paulo, CEP 05508-900, SP, Brazil
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14
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Santos PCJL, Cançado RD, Terada CT, Rostelato S, Gonzales I, Hirata RDC, Hirata MH, Chiattone CS, Guerra-Shinohara EM. HFE gene mutations and iron status of Brazilian blood donors. Braz J Med Biol Res 2009; 43:107-14. [PMID: 20027482 DOI: 10.1590/s0100-879x2009007500031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2009] [Accepted: 12/04/2009] [Indexed: 12/15/2022] Open
Abstract
Mutations of the HFE and TFR2 genes have been associated with iron overload. HFE and TFR2 mutations were assessed in blood donors, and the relationship with iron status was evaluated. Subjects (N = 542) were recruited at the Hemocentro da Santa Casa de São Paulo, São Paulo, Brazil. Iron status was not influenced by HFE mutations in women and was independent of blood donation frequency. In contrast, men carrying the HFE 282CY genotype had lower total iron-binding capacity (TIBC) than HFE 282CC genotype carriers. Men who donated blood for the first time and were carriers of the HFE 282CY genotype had higher transferrin saturation values and lower TIBC concentrations than those with the homozygous wild genotype for the HFE C282Y mutation. Moreover, in this group of blood donors, carriers of HFE 63DD plus 63HD genotypes had higher serum ferritin values than those with the homozygous wild genotype for HFE H63D mutation. Multiple linear regression analysis showed that HFE 282CY leads to a 17.21% increase (P = 0.018) and a 83.65% decrease (P = 0.007) in transferrin saturation and TIBC, respectively. In addition, serum ferritin is influenced by age (3.91%, P = 0.001) and the HFE 63HD plus DD genotype (55.84%, P = 0.021). In conclusion, the HFE 282Y and 65C alleles were rare, while the HFE 63D allele was frequent in Brazilian blood donors. The HFE C282Y and H63D mutations were associated with alterations in iron status in blood donors in a gender-dependent manner.
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Affiliation(s)
- P C J L Santos
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brasil
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15
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Barbosa PR, Stabler SP, Machado ALK, Braga RC, Hirata RDC, Hirata MH, Sampaio-Neto LF, Allen RH, Guerra-Shinohara EM. Association between decreased vitamin levels and MTHFR, MTR and MTRR gene polymorphisms as determinants for elevated total homocysteine concentrations in pregnant women. Eur J Clin Nutr 2007; 62:1010-21. [PMID: 17522601 DOI: 10.1038/sj.ejcn.1602810] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES To examine the association between methylenetetrahydrofolate reductase (MTHFR) (C677T and A1298C), methionine synthase (MTR) A2756G and methionine synthase reductase (MTRR) A66G gene polymorphisms and total homocysteine (tHcy), methylmalonic acid (MMA) and S-adenosylmethionine/S-adenosylhomocysteine (SAM/SAH) levels; and to evaluate the potential interactions with folate or cobalamin (Cbl) status. SUBJECTS/METHODS Two hundred seventy-five healthy women at labor who delivered full-term normal babies. Cbl, folate, tHcy, MMA, SAM and SAH were measured in serum specimens. The genotypes for polymorphisms were determined by PCR-restriction fragment length polymorphism (RFLP). RESULTS Serum folate, MTHFR 677T allele and MTR 2756AA genotypes were the predictors of tHcy levels in pregnant women. Serum Cbl and creatinine were the predictors of SAM/SAH ratio and MMA levels, respectively. The gene polymorphisms were not determinants for MMA levels and SAM/SAH ratios. Low levels of serum folate were associated with elevated tHcy in pregnant women, independently of the gene polymorphisms. In pregnant women carrying MTHFR 677T allele, or MTHFR 1298AA or MTRR 66AA genotypes, lower Cbl levels were associated with higher levels of tHcy. Lower SAM/SAH ratio was found in MTHFR 677CC or MTRR A2756AA genotypes carriers when Cbl levels were lower than 142 pmol/l. CONCLUSIONS Serum folate and MTHFR C677T and MTR A2576G gene polymorphisms were the determinants for tHcy levels. The interaction between low levels of serum Cbl and MTHFR (C677T or A1298C) or MTRR A66G gene polymorphisms was associated with increased tHcy.
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Affiliation(s)
- P R Barbosa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, SP, Brazil
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16
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Pereira AC, Schettert IT, Morandini Filho AAF, Guerra-Shinohara EM, Krieger JE. Methylenetetrahydrofolate reductase (MTHFR) c677t gene variant modulates the homocysteine folate correlation in a mild folate-deficient population. Clin Chim Acta 2004; 340:99-105. [PMID: 14734201 DOI: 10.1016/j.cccn.2003.09.016] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND A large body of evidence links plasma concentrations of homocysteine and cardiovascular disease. Several genetic and environmental variables may modulate such relationship. We investigated the influence of methylenetetrahydrofolate reductase (MTHFR) gene variants C677T, A1298C, and T1317C on homocysteine, folate, and cobalamin concentrations in a sample of individuals from a mild folate deficiency population to better clarify the complex interactions existing among these variables. METHODS In the present study, 209 individuals belonging to an admixed urban population characterized by mild folate deficiency were investigated. MTHFR gene variants C677T, A1298C, and T1317C were genotyped and homocysteine-, folate-, and cobalamin-determined for each individual. RESULTS Univariate analyses showed a significant association between the C677T variant with homocysteine (P<0.001) and cobalamin (P=0.005) as well as a significant relationship between the T allele and serum folate concentrations (P<0.05). The TT genotype of the C677T polymorphism remained significantly associated with log-transformed homocysteine even after adjustment for age, sex, smoking status, ethnicity, folate, and cobalamin concentrations (P<0.01). Both univariate and multivariate analysis have failed to show any effect of the A1298C and T1317C genetic variants in homocysteine concentrations in this population. Finally, a significant interaction between folate and C677T polymorphism in the determination of homocysteine was also disclosed (P<0.005). CONCLUSIONS Taken together, these results demonstrate a significant interaction between serum folate and MTHFR genotype in predicting homocysteine concentrations. One may consider that a differential response of homocysteine to folic acid supplementation may depend on MTHFR genotype which may have important implications when attempting to lower homocysteine concentrations in populations with mild folate deficiency.
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Affiliation(s)
- Alexandre C Pereira
- Laboratorio de Genética e Cardiologia Molecular, InCor-Instituto do Coracao-HCFMUSP, Av. Dr. Eneas de Carvalho Aguiar 44, SP 05403-000, Sao Paulo, Brazil
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Affiliation(s)
- Gizele Thame
- Departamento de Saúde Materno-Infantil, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo-SP, Brazil CEP 05054-010
- Seção de Hematologia, Instituto Adolfo Lutz, São Paulo-SP, Brazil
| | - Elvira Maria Guerra-Shinohara
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo-SP, Brazil CEP 05508-900
| | - Antonio Fernandes Moron
- Departamento de Saúde Materno-Infantil, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo-SP, Brazil CEP 05054-010
- Setor de Medicina Fetal da Disciplina de Obstetrícia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo-SP, Brazil CEP 0437-002
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Thame G, Guerra-Shinohara EM, Moron AF. Serum folate by two methods in pregnant women carrying fetuses with neural tube defects. Clin Chem 2002; 48:1094-5. [PMID: 12089179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- Gizele Thame
- Departamento de Saúde Materno-Infantil, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo-SP, Brazil CEP 05054-010.
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Fujimori E, de Cassana LM, Szarfarc SC, de Oliveira IM, Guerra-Shinohara EM. [Changes in nutritional status of pregnant women assisted at the basic health network, Santo Andre, Brazil]. Rev Lat Am Enfermagem 2001; 9:64-9. [PMID: 12040792 DOI: 10.1590/s0104-11692001000300010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nutritional conditions in the pre-gestacional period and during pregnancy were evaluated in 372 pregnant women based on the body mass index and Rosso's Graph. Approximately half (51%) the pregnant women presented normal pre-gestacional weight; however, 17.7% were underweight and 31.3% overweight. In the third trimester, 18.8% were underweight and 28.2% overweight. The weight at birth increased as nutritional conditions during pregnancy improved. These results show the importance of appropriate anthropometric control in order to prevent a bad neonatal prognosis and reaffirms the importance of such activity during the whole routine of pre-natal control.
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Affiliation(s)
- E Fujimori
- Departamento de Enfermería en Salud Colectiva, Escuela de Enfermería, Universidad de São Paulo, Dirección: Av. Dr. Enéas de Carvalho Aguiar, 419-05403-000-São Paulo-São Paulo-Brasil
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Szarfarc SC, de Cassana LM, Fujimori E, Guerra-Shinohara EM, de Oliveira IM. Relative effectiveness of iron bis-glycinate chelate (Ferrochel) and ferrous sulfate in the control of iron deficiency in pregnant women. Arch Latinoam Nutr 2001; 51:42-7. [PMID: 11688081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The relative effectiveness of daily supplementation of iron deficiency during pregnancy using 15 mg/day of iron from iron-bis-glycinate chelate (71 pregnant women), or 40 mg iron from ferrous sulfate (74 pregnant women) was evaluated by measuring hemoglobin, transferrin saturation and serum ferritin, at the beginning of the study (< 20 weeks of pregnancy) and at 20-30 weeks and 30-40 weeks thereafter. Ingestion for 13 weeks or more was considered adequate. Seventy three percent of the Ferrochel consuming group and 35% of the ferrous sulfate consuming group were considered to have taken the treatment adequately. The decrease in levels of all the measured parameters was significantly less pronounced in the group that consumed Ferrochel in spite of the lower treatment dose. Iron depletion was found in 30.8% of the women treated with Ferrochel and in 54.5% of the women than consumed ferrous sulfate. Of the factors responsible for non compliance taste was reported in 29.8% of the ferrous sulfate consumers and none in the groups that consumed Ferrochel. It is concluded that daily supplementation with Ferrochel was significantly more effective, in spite of the lower dose, than supplementation with ferrous sulfate.
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Abstract
The assessment of iron status at individual and populational levels has been the target of many studies because some issues still need to be defined. A Medline, Lilacs and Dedalus literature review was carried out for the period of 1972 to 1998 and scientific publications in both English and Portuguese relating hematological and biochemical parameters were used in the assessment of iron status. The parameters reflect the three different stages of iron storage deficiency, which occur in a gradual and progressive way leading to the development of anaemia. In general, when used alone, these parameters are neither sensitive nor specific for detecting iron deficiency anaemia. Moreover, some advantages and limitations should be taken into consideration for the choice of the appropriate parameter. To improve both sensitivity and specificity, different parameters have been used in association and their specific contribution is determined according to the characteristics of the study population, methodological issues and the costs involved in the process.
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Affiliation(s)
- A A Paiva
- Departamento de Nutrição, Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo, SP, Brasil
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Abstract
Erythrocyte membrane proteins from 44 representative mammals were studied. Protein 4.2 was not detected in guinea pigs (Cavia porcellus) (N = 14), Southern Brazilian swamp large rats (Myocastor coypus) (N = 2), cutias (Dasyprocta sp) (N = 4), and horses (Equus caballus) (N = 13). These animals also presented high ankyrin concentrations except for the horse which did not exhibit a sharp band, although minor components located between proteins 2 and 3 could account for the ankyrin family. The rodents studied did present band 6, which was not detectable in other common rodents such as white rats (Rattus norvegicus) (N = 9) and mice (Mus musculus) (N = 12). Since the absence of protein 4.2 does not disrupt the cytoskeleton membrane, we suggest that it is not an essential protein. Its absence may be compensated physiologically by the higher ankyrin concentration observed.
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