Serum Folate Levels in Patients with Chronic Hemolytic Anemia on Regular Folic Acid Supplementation Before and After Dose Modification

2019 ◽  
Vol 56 (10) ◽  
pp. 845-848 ◽  
Author(s):  
Mona Azzam ◽  
Samy Attalla
Keyword(s):  
Folic Acid ◽  
Hemolytic Anemia ◽  
Folic Acid Supplementation ◽  
Serum Folate ◽  
Acid Supplementation ◽  
Dose Modification ◽  
Before And After ◽  
Chronic Hemolytic Anemia

Folate: In Vitro and in Vivo Effects on VLDL and LDL Oxidation

2007 ◽  
Vol 77 (1) ◽  
pp. 66-72 ◽  
Author(s):  
McEneny ◽  
Couston ◽  
McKibben ◽  
Young ◽  
Woodside
Keyword(s):  
Folic Acid ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Folic Acid Supplementation ◽  
Serum Folate ◽  
Ldl Oxidation ◽  
Low Density ◽  
Acid Supplementation

Raised total homocysteine (tHcy) levels may be involved in the etiology of cardiovascular disease and can lead to damage of vascular endothelial cells and arterial wall matrix. Folic acid supplementation can help negate these detrimental effects by reducing tHcy. Recent evidence has suggested an additional anti-atherogenic property of folate in protecting lipoproteins against oxidation. This study utilized both an in vitro and in vivo approach. In vitro: Very-low-density lipoprotein (VLDL) and low density lipoprotein (LDL) were isolated by rapid ultracentrifugation and then oxidized in the presence of increasing concentrations (0→ μmol/L) of either folic acid or 5-methyltetrahydrofolate (5-MTHF). In vivo: Twelve female subjects were supplemented with folic acid (1 mg/day), and the pre- and post-VLDL and LDL isolates subjected to oxidation. In vitro: 5-MTHF, but not folic acid, significantly increased the resistance of VLDL and LDL to oxidation. In vivo: Following folic acid supplementation, tHcy decreased, serum folate increased, and both VLDL and LDL displayed a significant increase in their resistance to oxidation. These results indicated that in vitro, only the active form of folate, 5-MTHF, had antioxidant properties. In vivo results demonstrated that folic acid supplementation reduced tHcy and protected both VLDL and LDL against oxidation. These findings provide further support for the use of folic acid supplements to aid in the prevention of atherosclerosis.

Folic acid attenuates homocysteine and enhances antioxidative capacity in atherosclerotic rats

2017 ◽  
Vol 42 (10) ◽  
pp. 1015-1022 ◽  
Author(s):  
Shanshan Cui ◽  
Wen Li ◽  
Xin Lv ◽  
Pengyan Wang ◽  
Guowei Huang ◽  
...  
Keyword(s):  
Folic Acid ◽  
Antioxidant Capacity ◽  
Wistar Rats ◽  
Folic Acid Supplementation ◽  
Plasma Homocysteine ◽  
Serum Folate ◽  
Antioxidative Capacity ◽  
High Fat ◽  
Acid Supplementation ◽  
Atherosclerotic Lesions

Atherosclerosis is a chronic disease that can seriously endanger human life. Folic acid supplementation modulates several disorders, including atherosclerosis, via its antiapoptotic and antioxidative properties. This study investigated whether folic acid alleviates atherogenesis by restoring homocysteine levels and antioxidative capacity in atherosclerosis Wistar rats. To this end, 28 Wistar rats were randomly divided into 4 groups (7 rats/group) as follows: (i) wild-type group, fed only the AIN-93 semi-purified rodent diet (folic acid: 2.1 mg/kg); (ii) high-fat + folic acid-deficient group (HF+DEF) (folic acid: 0.2 mg/kg); (iii) high-fat + normal folic acid group (folic acid: 2.1 mg/kg); and (iv) high-fat + folic acid-supplemented group (folic acid: 4.2 mg/kg). After 12 weeks, histopathological changes in the atherosclerotic lesions of the aortic arch were determined. In addition, serum folate levels, plasma homocysteine levels, plasma S-adenosyl-homocysteine levels, antioxidant status, oxidant status, and lipid profiles were evaluated. The results show aggravated atherosclerotic lesions in the HF+DEF group. Folic acid supplementation increased concentrations of serum folate. Further, folic acid supplementation increased high-density lipoprotein-cholesterol, decreased plasma homocysteine levels, and improved antioxidant capacity in atherogenic rats. These findings are consistent with the hypothesis that folic acid alleviates atherogenesis by reducing plasma homocysteine levels and improving antioxidant capacity in rats fed a high-fat diet.

Obesity is associated with folate metabolism

2020 ◽  
Vol 90 (3-4) ◽  
pp. 353-364 ◽  
Author(s):  
Süleyman Köse ◽  
Saniye Sözlü ◽  
Hatice Bölükbaşi ◽  
Nüket Ünsal ◽  
Makbule Gezmen-Karadağ
Keyword(s):  
Folic Acid ◽  
Folic Acid Supplementation ◽  
Normal Weight ◽  
Folate Intake ◽  
Serum Folate ◽  
Systemic Review ◽  
Lower Serum ◽  
Cross Sectional ◽  
Acid Supplementation ◽  
Supplement Use

Abstract. Objective: The aim of the present study is to perform a systemic review of the previous studies executed on the association between obesity and folate. Method: In the present research, the selected keywords were scanned on the PubMed, Web of Science, Cochrane and Lilac databases between May and June, 2017 through Gazi University’s network. In total, 4236 clinical, randomized controlled, cross-sectional and prospective studies were determined and 17 of these that specifically fit the aims of the present research were reviewed. This study involved an electronic literature search of databases on folic acid and obesity published in the English language between 2000 and 2016. Results: Of the 17 studies, 5 were based on folic acid supplementation and 12 were related with participants’ folate status. As a general consequence of both intake and serum/status measurements of folic acid supplementation: It was found that obesity-associated metabolic changes might affect individual folate use and obese individuals had lower serum folate levels, although there was no change in folate intake. Conclusion: Overweight and obese individuals have lower serum folate concentrations when compared with individuals with normal weight. It is explained by increased use of folic acid, urinary excretion, dilution of blood volume, different levels in different tissues and changes in the endocrine functions of folate. Individuals with higher Body Mass Indexes have less supplement use, unhealthier diets and donot consume sufficient vegetables and fruits, all of which can affect decrease in folate levels. Furthermore, adiposity may affect folate absorption by intestinal epithelium.

No effect of folic acid supplementation in the course of 1 year on haemostasis markers and C-reactive protein in older adults

2005 ◽  
Vol 94 (07) ◽  
pp. 96-100 ◽  
Author(s):  
Mariska Klerk ◽  
Jane Durga ◽  
Evert G. Schouten ◽  
Cornelis Kluft ◽  
Frans J. Kok ◽  
...  
Keyword(s):  
Older Adults ◽  
Folic Acid ◽  
Disease Risk ◽  
Controlled Trial ◽  
Folic Acid Supplementation ◽  
Serum Folate ◽  
Tissue Type ◽  
C Reactive Protein ◽  
Acid Supplementation ◽  
Reactive Protein

SummaryElevated homocysteine levels are associated with an increased cardiovascular disease (CVD) risk, but the underlying mechanism is still unclear. High homocysteine might affect the endothelium, and consequently lead to impaired haemostasis. In a randomized placebo controlled trial among 276 older adults with plasma total homocysteine concentrations above 13 mM at screening, we investigated the effect of homocysteine lowering by folic acid supplementation (0.8 mg/day) for 1 year on markers of endothelial function (vonWillebrand factor), coagulation (tissue factor, factor VIIa, fragments 1+2), and fibrinolysis (fibrin degradation products, tissue-type plasminogen activator), and inflammation (C-reactive protein). Despite a 24% reduction in plasma homocysteine concentration and four-fold increase in serum folate concentration in the folic acid group compared to the placebo group, there was no clear change in any of the haemostasis markers, nor CRP. Although homocysteine is associated with vascular disease risk in the general population, marked lowering of slightly elevated homocysteine concentrations by one-year folic acid supplementation does not influence haemostasis markers.

A Reassessment of the Red Blood Cell Folate Assay

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 3209-3209 ◽  
Author(s):  
James Hoyer ◽  
Jennifer Oliveira ◽  
Nikola Baumann ◽  
Amy Saenger
Keyword(s):  
Folic Acid ◽  
Alcohol Abuse ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Previous History ◽  
Folate Deficiency ◽  
Folic Acid Supplementation ◽  
Serum Folate ◽  
Acid Supplementation ◽  
History Of

Abstract Abstract 3209 Background: The red blood cell folate (RCF) assay has historically been recommended as a more reliable indicator of tissue folate stores compared to the serum folate (SF) assay, as it is not affected by recent ingestion of food. However, the RCF assay suffers from inherent problems with imprecision and accuracy, which are not encountered with SF measurements. Furthermore, following the advent of required folic acid supplementation of many foods by the Food and Drug Administration (FDA) in 1992, folate deficiency is increasingly rare. Very few studies have looked at the value of the RCF versus the SF. We undertook a 10 year retrospective analysis of RCF and SF results to determine the clinical utility of RCF beyond that of SF. Methods: We retrieved all RCF and SF results from the laboratory information system at Mayo Clinic (Rochester, MN) ordered on inpatients and outpatients between 1999–2009. Data for patients who had concurrent orders for SF and RCF were analyzed and chart reviews were conducted on those patients with normal SF but low RCF. Abnormal values were defined by the National Health and Nutrition Examination Surveys (NHANES)/Center for Disease Control (CDC) criteria for folate deficiency (SF< 3.0 ng/ml, RCF < 140 ng/ml). Results: A total of 152,166 SF and 15,708 RCF were performed over the decade of the study. The prevalence of folate deficiency using only SF values was 0.39% and 0.27% using only RCF values. There were 1082 patients in which SFA and RCFA were ordered concurrently (Table 1). Only 1 patient (0.09%) had both abnormal SF and RCF. Chart reviews of the 4 patients with a normal SF but low RCF were as follows: 1) a 6 year old (yo). male with known folic acid transporter deficiency treated with Leucovorin. 2) a 58 yo male with history of gout, hypertension, psoriasis, and hyperlipidemia with normal hemoglobin (Hb) and MCV. 3) a 65 yo male with chronic diarrhea and suspected alcohol abuse; slight macrocytosis (MCV=100.3 fL) but normal Hb. 4) a 51 yo male with multifactorial gait disorder and alcohol abuse. There was a previous history of vitamin B12 deficiency but B12 levels were normal at this time. The CBC was notable for macrocytosis (MCV=115.1 fL) without anemia. Only in patient 4 did the RCF value result in the institution of folic acid supplementation. Conclusions: The RCF provides no additional information beyond that provided by the SF in virtually all situations. Thus SF alone is sufficient for assessment of folate stores. However, there is no evidence to support routine ordering of either SF or RCF, as true folate deficiency in the current era of FDA mandated folic acid supplementation is exceedingly rare. Disclosures: No relevant conflicts of interest to declare.

scholarly journals Serum and red-blood-cell folate demonstrate differential associations with BMI in pregnant women

2016 ◽  
Vol 19 (14) ◽  
pp. 2572-2579 ◽  
Author(s):  
Minxue Shen ◽  
Shazia Hira Chaudhry ◽  
Amanda J MacFarlane ◽  
Laura Gaudet ◽  
Graeme N Smith ◽  
...  
Keyword(s):  
Folic Acid ◽  
Pregnant Women ◽  
Maternal Education ◽  
Folic Acid Supplementation ◽  
Differential Association ◽  
Serum Folate ◽  
Obese Women ◽  
Sample Collection ◽  
Cross Sectional ◽  
Acid Supplementation

AbstractObjectiveTo examine the association between BMI and folate concentrations in serum and red blood cells (RBC) in pregnant women.DesignA cross-sectional comparison of folate concentrations in serum and RBC sampled simultaneously from the same individual.SettingThe Ottawa Hospital and Kingston General Hospital, Ontario, Canada.SubjectsPregnant women recruited between 12 and 20 weeks of gestation.ResultsA total of 869 pregnant women recruited from April 2008 to April 2009 were included in the final analysis. Serum folate was inversely associated and RBC folate positively associated with BMI, after adjusting for folic acid supplementation, age, gestational age at blood sample collection, race, maternal education, annual income, smoking and MTHFR 677C→T genotype. In stratified analyses, this differential association was significant in women with the MTHFR CC variant. In women with the CT and TT variants, the differential associations were in the same direction but not significant. Folic acid supplementation during pregnancy did not alter the differential association of BMI with serum and RBC folate concentration. This indicates that the current RBC folate cut-off approach for assessing risk of neural tube defects in obese women may be limited.ConclusionsBMI is inversely associated with serum folate and positively associated with RBC folate in pregnant women, especially for those with the MTHFR CC variant.

Sign in / Sign up

Export Citation Format

Share Document