5-Methyltetrahydrofolic acid (BioDeep_00000001267)

 

Secondary id: BioDeep_00000016512, BioDeep_00000180451, BioDeep_00001868257

human metabolite PANOMIX_OTCML-2023 Endogenous blood metabolite Volatile Flavor Compounds


代谢物信息卡片


(2R)-2-[(4-{[(2-amino-5-methyl-4-oxo-3,4,5,6,7,8-hexahydropteridin-6-yl)methyl]amino}phenyl)formamido]pentanedioic acid

化学式: C20H25N7O6 (459.186623)
中文名称: L-5-甲基四氢叶酸
谱图信息: 最多检出来源 Homo sapiens(blood) 0.5%

Reviewed

Last reviewed on 2024-08-14.

Cite this Page

5-Methyltetrahydrofolic acid. BioDeep Database v3. PANOMIX ltd, a top metabolomics service provider from China. https://query.biodeep.cn/s/5-methyltetrahydrofolic_acid (retrieved 2024-11-22) (BioDeep RN: BioDeep_00000001267). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

分子结构信息

SMILES: c1([nH]c(=O)c2c(n1)NC[C@@H](N2C)CNc1ccc(cc1)C(=O)N[C@H](CCC(=O)O)C(=O)O)N
InChI: InChI=1S/C20H25N7O6/c1-27-12(9-23-16-15(27)18(31)26-20(21)25-16)8-22-11-4-2-10(3-5-11)17(30)24-13(19(32)33)6-7-14(28)29/h2-5,12-13,22H,6-9H2,1H3,(H,24,30)(H,28,29)(H,32,33)(H4,21,23,25,26,31)/t12-,13+/m0/s1

描述信息

5 methyltetrahydrofolic acid (5-MTHF) is the most biologically active form of the B-vitamin known as folic acid, also known generically as folate. 5-MTHF functions, in concert with vitamin B12, as a methyl-group donor involved in the conversion of the amino acid homocysteine to methionine. Methyl (CH3) group donation is vital to many bodily processes, including serotonin, melatonin, and DNA synthesis. Therapeutically, 5-MTHF is instrumental in reducing homocysteine levels, preventing neural tube defects, and improving vascular endothelial function. Research on folate supplementation suggests it plays a key role in preventing cervical dysplasia and protecting against neoplasia in ulcerative colitis. Folic acid also shows promise as part of a nutritional protocol to treat vitiligo, and may reduce inflammation of the gingiva. Furthermore, certain neurological, cognitive, and psychiatric presentations may be secondary to folate deficiency. Such presentations include depression, peripheral neuropathy, myelopathy, restless legs syndrome, insomnia, dementia, forgetfulness, irritability, endogenous depression, organic psychosis, and schizophrenia-like syndromes. After ingestion, the process of conversion of folic acid to the metabolically active coenzyme forms is relatively complex. Synthesis of the active forms of folic acid requires several enzymes, adequate liver and intestinal function, and adequate supplies of riboflavin (B2), niacin (B3), pyridoxine (B6), zinc, vitamin C, and serine. After formation of the coenzyme forms of the vitamin in the liver, these metabolically active compounds are secreted into the small intestine with bile (the folate enterohepatic cycle), where they are reabsorbed and distributed to tissues throughout the body. Human pharmacokinetic studies indicate folic acid has high bioavailability, with large oral doses of folic acid substantially raising plasma levels in healthy subjects in a time and dose dependent manner. Red blood cells (RBCs) appear to be the storage depot for folic acid, as RBC levels remain elevated for periods in excess of 40 days following discontinuation of supplementation. Folic acid is poorly transported to the brain and rapidly cleared from the central nervous system. The primary methods of elimination of absorbed folic acid are fecal (through bile) and urinary. Despite the biochemical complexity of this process, evidence suggests oral supplementation with folic acid increases the bodys pool of 5-MTHF in healthy individuals. However, enzyme defects, mal-absorption, digestive system pathology, and liver disease can result in impaired ability to activate folic acid. In fact, some individuals have a severe congenital deficiency of the enzyme Methyl tetrahydrofolate reductase (5-MTHFR), which is needed to convert folic acid to 5-MTHF. Milder forms of this enzyme defect likely interact with dietary folate status to determine risk for some disease conditions. In individuals with a genetic defect of this enzyme (whether mild or severe), supplementation with 5- MTHF might be preferable to folic acid supplementation. (PMID: 17176169).
5 methyltetrahydrofolic acid (5-MTHF) is the most biologically active form of the B-vitamin folic acid, also known generically as folate. 5-MTHF functions, in concert with vitamin B12, as a methyl-group donor involved in the conversion of the amino acid homocysteine to methionine. Methyl (CH3) group donation is vital to many bodily processes, including serotonin, melatonin, and DNA synthesis. Therapeutically, 5-MTHF is instrumental in reducing homocysteine levels, preventing neural tube defects, and improving vascular endothelial function. Research on folate supplementation suggests it plays a key role in preventing cervical dysplasia and protecting against neoplasia in ulcerative colitis. Folic acid also shows promise as part of a nutritional protocol to treat vitiligo, and may reduce inflammation of the gingiva. Furthermore, certain neurological, cognitive, and psychiatric presentations may be secondary to folate deficiency. Such presentations include depression, peripheral neuropathy, myelopathy, restless legs syndrome, insomnia, dementia, forgetfulness, irritability, endogenous depression, organic psychosis, and schizophrenia-like syndromes. After ingestion, the process of conversion of folic acid to the metabolically active coenzyme forms is relatively complex. Synthesis of the active forms of folic acid requires several enzymes, adequate liver and intestinal function, and adequate supplies of riboflavin (B2), niacin (B3), pyridoxine (B6), zinc, vitamin C, and serine. After formation of the coenzyme forms of the vitamin in the liver, these metabolically active compounds are secreted into the small intestine with bile (the folate enterohepatic cycle), where they are reabsorbed and distributed to tissues throughout the body. Human pharmacokinetic studies indicate folic acid has high bioavailability, with large oral doses of folic acid substantially raising plasma levels in healthy subjects in a time and dose dependent manner. Red blood cells (RBCs) appear to be the storage depot for folic acid, as RBC levels remain elevated for periods in excess of 40 days following discontinuation of supplementation. Folic acid is poorly transported to the brain and rapidly cleared from the central nervous system. The primary methods of elimination of absorbed folic acid are fecal (through bile) and urinary. Despite the biochemical complexity of this process, evidence suggests oral supplementation with folic acid increases the bodys pool of 5-MTHF in healthy individuals. However, enzyme defects, mal-absorption, digestive system pathology, and liver disease can result in impaired ability to activate folic acid. In fact, some individuals have a severe congenital deficiency of the enzyme Methyl tetrahydrofolate reductase (5-MTHFR), which is needed to convert folic acid to 5-MTHF. Milder forms of this enzyme defect likely interact with dietary folate status to determine risk for some disease conditions. In individuals with a genetic defect of this enzyme (whether mild or severe), supplementation with 5- MTHF might be preferable to folic acid supplementation. (PMID: 17176169) [HMDB]
5-Methyltetrahydrofolic acid (5-Methyl THF) is a biologically active form of folic acid. 5-Methyltetrahydrofolic acid is a methylated derivate of tetrahydrofolate. 5-Methyltetrahydrofolic acid is the predominant natural dietary folate and the principal form of folate in plasma and cerebrospinal fluid[1].
Levomefolic acid (5-MTHF) is an orally active, brain-penetrant natural active form of folic acid and is one of the most widely used folic acid food supplements[1][2].

同义名列表

39 个代谢物同义名

(2R)-2-[(4-{[(2-amino-5-methyl-4-oxo-3,4,5,6,7,8-hexahydropteridin-6-yl)methyl]amino}phenyl)formamido]pentanedioic acid; (2R)-2-[(4-{[(2-amino-5-methyl-4-oxo-3,6,7,8-tetrahydropteridin-6-yl)methyl]amino}phenyl)formamido]pentanedioic acid; N-(4-(((2-Amino-1,4,5,6,7,8-hexahydro-5-methyl-4-oxo-6-pteridinyl)methyl)amino)benzoyl)-L-glutamic acid; N-(4-(((2-Amino-1,4,5,6,7,8-hexahydro-5-methyl-4-oxo-6-pteridinyl)methyl)amino)benzoyl)-L-glutamate; 5-Methyltetrahydrofolate, methyl-(14)C-labeled, (DL-glu)-isomer; 5-Methyltetrahydrofolate, methyl-(14)C-labeled, (L-glu)-isomer; 5-Methyltetrahydrofolate, calcium salt (1:1), (L-glu)-isomer; N-(5-Methyl-5,6,7,8-tetrahydropteroyl)-L-glutamic acid; N-(5-Methyl-5,6,7,8-tetrahydropteroyl)-L-glutamate; [(6S)-5-Methyl-5,6,7,8-tetrahydropteroyl]glutamate; 5-Methyltetrahydrofolate, (L-glu)-(S)-isomer; 5-Methyltetrahydrofolate, (L-glu)-(R)-isomer; N5-Methyltetrahydropteroyl mono-L-glutamate; 5-Methyltetrahydrofolate, (DL-glu)-isomer; 5-Methyltetrahydropteroylglutamate; 5-Methyl-5,6,7,8-tetrahydrofolate; N(5)-Methyltetrahydrofolic acid; N5-Methyl-tetrahydrofolic acid; 5-Methyltetrahydrofolic acid; N( 5)-Methyltetrahydrofolate; N5-Methyl-tetrahydrofolate; 5-Methyl-tetrahydrofolate; 5-Methyl tetrahydrofolate; N5-Methyltetrahydrofolate; 5-Methyltetrahydrofolate; Methyl-tetrahydrofolate; Levomefolic acid; L-Methyl folate; L-Methylfolate; Methyl folate; 5-Methyl-THF; Mefolinate; Prefolic a; methyl-THF; CH3-FH4; Deplin; 5-Methyl THF; 5-MTHF; 5-Methyltetrahydrofolate



数据库引用编号

26 个数据库交叉引用编号

分类词条

相关代谢途径

Reactome(0)

BioCyc(6)

PlantCyc(0)

代谢反应

74 个相关的代谢反应过程信息。

Reactome(13)

BioCyc(7)

WikiPathways(3)

Plant Reactome(0)

INOH(2)

PlantCyc(0)

COVID-19 Disease Map(0)

PathBank(49)

PharmGKB(0)

2 个相关的物种来源信息

在这里通过桑基图来展示出与当前的这个代谢物在我们的BioDeep知识库中具有相关联信息的其他代谢物。在这里进行关联的信息来源主要有：

  • PubMed: 来源于PubMed文献库中的文献信息，我们通过自然语言数据挖掘得到的在同一篇文献中被同时提及的相关代谢物列表，这个列表按照代谢物同时出现的文献数量降序排序，取前10个代谢物作为相关研究中关联性很高的代谢物集合展示在桑基图中。
  • NCBI Taxonomy: 通过文献数据挖掘，得到的代谢物物种来源信息关联。这个关联信息同样按照出现的次数降序排序，取前10个代谢物作为高关联度的代谢物集合展示在桑吉图上。
  • Chemical Taxonomy: 在物质分类上处于同一个分类集合中的其他代谢物
  • Chemical Reaction: 在化学反应过程中，存在为当前代谢物相关联的生化反应过程中的反应底物或者反应产物的关联代谢物信息。

点击图上的相关代谢物的名称，可以跳转到相关代谢物的信息页面。



文献列表

  • Han Yang, Jinning Yang, Cheng Liu, Xueqin Lv, Long Liu, Jianghua Li, Guocheng Du, Jian Chen, Yanfeng Liu. High-Level 5-Methyltetrahydrofolate Bioproduction in Bacillus subtilis by Combining Modular Engineering and Transcriptomics-Guided Global Metabolic Regulation. Journal of agricultural and food chemistry. 2022 May; 70(19):5849-5859. doi: 10.1021/acs.jafc.2c01252. [PMID: 35521920]
  • Yu Cheng, Shuai Liu, Duo Chen, Yiman Yang, Qiongyue Liang, Ya Huo, Ziyi Zhou, Nan Zhang, Zhuo Wang, Lishun Liu, Yun Song, Xiangyi Liu, Yong Duan, Xiuwen Liang, Bingjie Hou, Binyan Wang, Genfu Tang, Xianhui Qin, Fangrong Yan. Association between serum 5-methyltetrahydrofolate and homocysteine in Chinese hypertensive participants with different MTHFR C677T polymorphisms: a cross-sectional study. Nutrition journal. 2022 05; 21(1):29. doi: 10.1186/s12937-022-00786-w. [PMID: 35562805]
  • Ajana Pathikkal, Bijesh Puthusseri, Peethambaran Divya, Sudha Rudrappa, Vikas Singh Chauhan. Folate derivatives, 5-methyltetrahydrofolate and 10-formyltetrahydrofolate, protect BEAS-2B cells from high glucose-induced oxidative stress and inflammation. In vitro cellular & developmental biology. Animal. 2022 May; 58(5):419-428. doi: 10.1007/s11626-022-00691-w. [PMID: 35678985]
  • Hong Wu, Zhengduo Zhang, Yuxin Wang, Tianran Zhang, Shaojun Qi, Yanjin Tang, Xibao Gao. Investigation into the Properties of L-5-Methyltetrahydrofolate and Seal Oil as a Potential Atherosclerosis Intervention in Rats. Journal of nutritional science and vitaminology. 2022; 68(2):87-96. doi: 10.3177/jnsv.68.87. [PMID: 35491209]
  • Shaimaa M Sallam, Eman Shawky, Samah M El Sohafy. Determination of the effect of germination on the folate content of the seeds of some legumes using HPTLC-mass spectrometry-multivariate image analysis. Food chemistry. 2021 Nov; 362(?):130206. doi: 10.1016/j.foodchem.2021.130206. [PMID: 34082289]
  • Zenglin Lian, Hong Chen, Kang Liu, Qianghua Jia, Feng Qiu, Yongzhi Cheng. Improved Stability of a Stable Crystal Form C of 6S-5-Methyltetrahydrofolate Calcium Salt, Method Development and Validation of an LC-MS/MS Method for Rat Pharmacokinetic Comparison. Molecules (Basel, Switzerland). 2021 Oct; 26(19):. doi: 10.3390/molecules26196011. [PMID: 34641555]
  • Seok-Won Hyung, Sunyoung Lee, Jeesoo Han, Joonhee Lee, Song-Yee Beak, Byungjoo Kim, Kiwhan Choi, Seonghee Ahn. Highly sensitive analytical method for the accurate determination of 5-methyltetrahydrofolic acid monoglutamate in various volumes of human plasma using isotope dilution ultra-high performance liquid chromatography-mass spectrometry. Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 2021 Aug; 1179(?):122725. doi: 10.1016/j.jchromb.2021.122725. [PMID: 34311437]
  • Xuanye Cao, Annika Wolf, Sung-Eun Kim, Robert M Cabrera, Bogdan J Wlodarczyk, Huiping Zhu, Margaret Parker, Ying Lin, John W Steele, Xiao Han, Vincent Th Ramaekers, Robert Steinfeld, Richard H Finnell, Yunping Lei. CIC de novo loss of function variants contribute to cerebral folate deficiency by downregulating FOLR1 expression. Journal of medical genetics. 2021 07; 58(7):484-494. doi: 10.1136/jmedgenet-2020-106987. [PMID: 32820034]
  • Mengyi Liu, Zhuxian Zhang, Chun Zhou, Qinqin Li, Panpan He, Yuanyuan Zhang, Huan Li, Chengzhang Liu, Min Liang, Xiaobin Wang, Xiping Xu, Fan Fan Hou, Xianhui Qin. Relationship of several serum folate forms with the risk of mortality: A prospective cohort study. Clinical nutrition (Edinburgh, Scotland). 2021 06; 40(6):4255-4262. doi: 10.1016/j.clnu.2021.01.025. [PMID: 33551219]
  • Emanuela Pannia, Rola Hammoud, Ruslan Kubant, Jong Yup Sa, Rebecca Simonian, Brandi Wasek, Paula Ashcraft, Teodoro Bottiglieri, Zdenka Pausova, G Harvey Anderson. High Intakes of [6S]-5-Methyltetrahydrofolic Acid Compared with Folic Acid during Pregnancy Programs Central and Peripheral Mechanisms Favouring Increased Food Intake and Body Weight of Mature Female Offspring. Nutrients. 2021 Apr; 13(5):. doi: 10.3390/nu13051477. [PMID: 33925570]
  • Patrycja Guzik, Martina Benešová, Magdalena Ratz, Josep M Monné Rodríguez, Luisa M Deberle, Roger Schibli, Cristina Müller. Preclinical evaluation of 5-methyltetrahydrofolate-based radioconjugates-new perspectives for folate receptor-targeted radionuclide therapy. European journal of nuclear medicine and molecular imaging. 2021 04; 48(4):972-983. doi: 10.1007/s00259-020-04980-y. [PMID: 33063250]
  • Pooja Dhiman, Raji Ramachandran Pillai, Anand Babu Wilson, Nancy Premkumar, Balaji Bharadwaj, Veena P Ranjan, Soundravally Rajendiran. Cross-sectional association between vitamin B12 status and probable postpartum depression in Indian women. BMC pregnancy and childbirth. 2021 Feb; 21(1):146. doi: 10.1186/s12884-021-03622-x. [PMID: 33596868]
  • Dandan Sun, Yue Jin, Qingyu Zhao, Chaohua Tang, Yi Li, Hao Wang, Yuchang Qin, Junmin Zhang. Modified EMR-lipid method combined with HPLC-MS/MS to determine folates in egg yolks from laying hens supplemented with different amounts of folic acid. Food chemistry. 2021 Feb; 337(?):127767. doi: 10.1016/j.foodchem.2020.127767. [PMID: 32799162]
  • Emanuela Pannia, Rola Hammoud, Rebecca Simonian, Erland Arning, Paula Ashcraft, Brandi Wasek, Teodoro Bottiglieri, Zdenka Pausova, Ruslan Kubant, G Harvey Anderson. [6S]-5-Methyltetrahydrofolic Acid and Folic Acid Pregnancy Diets Differentially Program Metabolic Phenotype and Hypothalamic Gene Expression of Wistar Rat Dams Post-Birth. Nutrients. 2020 Dec; 13(1):. doi: 10.3390/nu13010048. [PMID: 33375730]
  • Rima Obeid, Christiane Schön, Klaus Pietrzik, Daniel Menzel, Manfred Wilhelm, Yvo Smulders, Jean-Pierre Knapp, Ruth Böhni. Pharmacokinetics of Sodium and Calcium Salts of (6S)-5-Methyltetrahydrofolic Acid Compared to Folic Acid and Indirect Comparison of the Two Salts. Nutrients. 2020 Nov; 12(12):. doi: 10.3390/nu12123623. [PMID: 33255787]
  • Ramkripa Raghavan, Jacob Selhub, Ligi Paul, Yuelong Ji, Guoying Wang, Xiumei Hong, Barry Zuckerman, M Daniele Fallin, Xiaobin Wang. A prospective birth cohort study on cord blood folate subtypes and risk of autism spectrum disorder. The American journal of clinical nutrition. 2020 11; 112(5):1304-1317. doi: 10.1093/ajcn/nqaa208. [PMID: 32844208]
  • Karen L Koenig, Stephanie Scarmo, Yelena Afanasyeva, Tess V Clendenen, Per Magne Ueland, Anne Zeleniuch-Jacquotte. Circulating unmetabolized folic acid and 5-methyltetrahydrofolate and risk of breast cancer: a nested case-control study. European journal of clinical nutrition. 2020 09; 74(9):1306-1315. doi: 10.1038/s41430-020-0615-6. [PMID: 32317749]
  • Yubin Ji, Hongjun Luo, Hui Li, Zhexuan Lin, Wenhong Luo. Determination of plasma homocysteine with a UHPLC-MS/MS method: Application to analyze the correlation between plasma homocysteine and whole blood 5-methyltetrahydrofolate in healthy volunteers. Biomedical chromatography : BMC. 2020 Aug; 34(8):e4845. doi: 10.1002/bmc.4845. [PMID: 32267542]
  • Han Yang, Yanfeng Liu, Jianghua Li, Long Liu, Guocheng Du, Jian Chen. Systems metabolic engineering of Bacillus subtilis for efficient biosynthesis of 5-methyltetrahydrofolate. Biotechnology and bioengineering. 2020 07; 117(7):2116-2130. doi: 10.1002/bit.27332. [PMID: 32170863]
  • Alessandra Vezzoli, Cinzia Dellanoce, Teresa Maria Caimi, Daniele Vietti, Michela Montorsi, Simona Mrakic-Sposta, Roberto Accinni. Influence of Dietary Supplementation for Hyperhomocysteinemia Treatments. Nutrients. 2020 Jun; 12(7):. doi: 10.3390/nu12071957. [PMID: 32630031]
  • Yoshinori Kubo, Hideoki Fukuoka, Terue Kawabata, Kumiko Shoji, Chisato Mori, Kenichi Sakurai, Masazumi Nishikawa, Takeshi Ohkubo, Kyoichi Oshida, Naotake Yanagisawa, Yuichiro Yamashiro. Distribution of 5-Methyltetrahydrofolate and Folic Acid Levels in Maternal and Cord Blood Serum: Longitudinal Evaluation of Japanese Pregnant Women. Nutrients. 2020 Jun; 12(6):. doi: 10.3390/nu12061633. [PMID: 32492914]
  • Rama Kiblawi, Andreana N Holowatyj, Biljana Gigic, Stefanie Brezina, Anne J M R Geijsen, Jennifer Ose, Tengda Lin, Sheetal Hardikar, Caroline Himbert, Christy A Warby, Jürgen Böhm, Martijn J L Bours, Fränzel J B van Duijnhoven, Tanja Gumpenberger, Dieuwertje E Kok, Janna L Koole, Eline H van Roekel, Petra Schrotz-King, Arve Ulvik, Andrea Gsur, Nina Habermann, Matty P Weijenberg, Per Magne Ueland, Martin Schneider, Alexis Ulrich, Cornelia M Ulrich, Mary Playdon. One-carbon metabolites, B vitamins and associations with systemic inflammation and angiogenesis biomarkers among colorectal cancer patients: results from the ColoCare Study. The British journal of nutrition. 2020 05; 123(10):1187-1200. doi: 10.1017/s0007114520000422. [PMID: 32019627]
  • Kelsey M Cochrane, Chantal Mayer, Angela M Devlin, Rajavel Elango, Jennifer A Hutcheon, Crystal D Karakochuk. Is natural (6S)-5-methyltetrahydrofolic acid as effective as synthetic folic acid in increasing serum and red blood cell folate concentrations during pregnancy? A proof-of-concept pilot study. Trials. 2020 May; 21(1):380. doi: 10.1186/s13063-020-04320-3. [PMID: 32370802]
  • Zia Fazili, Maya R Sternberg, Nancy Potischman, Chia-Yih Wang, Renee J Storandt, Lorraine Yeung, Sedigheh Yamini, Jaime J Gahche, WenYen Juan, Yan Ping Qi, Neelima Paladugula, Gwendolyn Gabey, Christine M Pfeiffer. Demographic, Physiologic, and Lifestyle Characteristics Observed with Serum Total Folate Differ Among Folate Forms: Cross-Sectional Data from Fasting Samples in the NHANES 2011-2016. The Journal of nutrition. 2020 04; 150(4):851-860. doi: 10.1093/jn/nxz278. [PMID: 31875475]
  • Doreen Schmidl, Kinga Howorka, Stephan Szegedi, Kristina Stjepanek, Stefan Puchner, Ahmed Bata, Ulrike Scheschy, Gerold Aschinger, René M Werkmeister, Leopold Schmetterer, Gerhard Garhofer. A pilot study to assess the effect of a three-month vitamin supplementation containing L-methylfolate on systemic homocysteine plasma concentrations and retinal blood flow in patients with diabetes. Molecular vision. 2020; 26(?):326-333. doi: . [PMID: 32355442]
  • Nafisa M Jadavji, Hannah Mosnier, Erin Kelly, Kamaya Lawrence, Sarah Cruickshank, Sarah Stacey, Adelina McCall, Sandeep Dhatt, Erland Arning, Teodoro Bottiglieri, Patrice D Smith. One-carbon metabolism supplementation improves outcome after stroke in aged male MTHFR-deficient mice. Neurobiology of disease. 2019 12; 132(?):104613. doi: 10.1016/j.nbd.2019.104613. [PMID: 31525435]
  • Fanyue Meng, Guoqing Zhang, Caifen Wang, Rui Zhu, Haiyan Li, Jian Xu, Shailendra Shakya, Weidong Chen, Li Wu, Jiwen Zhang. Folic acid and its metabolite codetermination for pharmacokinetics with circadian rhythms and evaluation of oral bioavailability. The Journal of pharmacy and pharmacology. 2019 Nov; 71(11):1645-1654. doi: 10.1111/jphp.13155. [PMID: 31435940]
  • Wansu Qiu, Aarthi R Gobinath, Yanhua Wen, Jehannine Austin, Liisa A M Galea. Folic acid, but not folate, regulates different stages of neurogenesis in the ventral hippocampus of adult female rats. Journal of neuroendocrinology. 2019 10; 31(10):e12787. doi: 10.1111/jne.12787. [PMID: 31478270]
  • Chenfeng Xu, Wenkai Hui, Lili Sun, Qianqian Gao, Qiaogen Zou. [Simultaneous determination of leucovorin and 5-methyl-tetrahydrofolate diastereoisomers in human plasma by high-performance liquid chromatography-tandem mass spectrometry coupled with ultrafiltration centrifugation-based pretreatment and its application to a pharmacokinetic study]. Se pu = Chinese journal of chromatography. 2019 Jun; 37(6):581-588. doi: 10.3724/sp.j.1123.2019.01008. [PMID: 31152507]
  • Petra Ložnjak, Carolina García-Salinas, Rocío Isabel Díaz de la Garza, Anette Bysted, Jette Jakobsen. The use of a plant enzyme for rapid and sensitive analysis of naturally-occurring folates in food by liquid chromatography-tandem mass spectrometry. Journal of chromatography. A. 2019 Jun; 1594(?):34-44. doi: 10.1016/j.chroma.2019.02.037. [PMID: 30799066]
  • Baiyi Li, Shaoyan Chang, Chi Liu, Min Zhang, Lianfeng Zhang, Liang Liang, Rui Li, Xiuwei Wang, Chuan Qin, Ting Zhang, Bo Niu, Li Wang. Low Maternal Dietary Folate Alters Retrotranspose by Methylation Regulation in Intrauterine Growth Retardation (IUGR) Fetuses in a Mouse Model. Medical science monitor : international medical journal of experimental and clinical research. 2019 May; 25(?):3354-3365. doi: 10.12659/msm.914292. [PMID: 31061382]
  • Lisa Striegel, Beate Brandl, Markus Kopp, Lukas Sam, Thomas Skurk, Michael Rychlik. Quantitation of 5-methyltetraydrofolic acid in plasma for determination of folate status and clinical studies by stable isotope dilution assays. PloS one. 2019; 14(2):e0212255. doi: 10.1371/journal.pone.0212255. [PMID: 30789924]
  • Barbara Troesch, Johann Demmelmair, Martina Gimpfl, Christina Hecht, Goran Lakovic, Robert Roehle, Ljilja Sipka, Branka Trisic, Milica Vusurovic, Rotraut Schoop, Sznezana Zdjelar, Berthold Koletzko. Suitability and safety of L-5-methyltetrahydrofolate as a folate source in infant formula: A randomized-controlled trial. PloS one. 2019; 14(8):e0216790. doi: 10.1371/journal.pone.0216790. [PMID: 31425504]
  • Helena Taflin, Elisabeth Odin, Kristoffer Derwinger, Göran Carlsson, Bengt Gustavsson, Yvonne Wettergren. Relationship between folate concentration and expression of folate-associated genes in tissue and plasma after intraoperative administration of leucovorin in patients with colorectal cancer. Cancer chemotherapy and pharmacology. 2018 12; 82(6):987-997. doi: 10.1007/s00280-018-3690-9. [PMID: 30269276]
  • Agata Sobczyńska-Malefora, Dominic J Harrington. Laboratory assessment of folate (vitamin B9) status. Journal of clinical pathology. 2018 Nov; 71(11):949-956. doi: 10.1136/jclinpath-2018-205048. [PMID: 30228213]
  • Yi-Yung Chen, Madhulika B Gupta, Rob Grattton, Theresa L Powell, Thomas Jansson. Down-regulation of placental folate transporters in intrauterine growth restriction. The Journal of nutritional biochemistry. 2018 09; 59(?):136-141. doi: 10.1016/j.jnutbio.2018.06.003. [PMID: 29986308]
  • Pietro G Signorile, Rosa Viceconte, Alfonso Baldi. Novel dietary supplement association reduces symptoms in endometriosis patients. Journal of cellular physiology. 2018 08; 233(8):5920-5925. doi: 10.1002/jcp.26401. [PMID: 29243819]
  • Kaliyaperumal Ashokkumar, Paramasivam Sivakumar, Muthukrishnan Saradhadevi. Identification and determination of naturally occurring folates in grains of rice (Oryza sativa L.) by UPLC-MS/MS analysis. Natural product research. 2018 Jul; 32(14):1733-1737. doi: 10.1080/14786419.2017.1392957. [PMID: 29058482]
  • M Stracquadanio, L Ciotta, M A Palumbo. Effects of myo-inositol, gymnemic acid, and L-methylfolate in polycystic ovary syndrome patients. Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology. 2018 Jun; 34(6):495-501. doi: 10.1080/09513590.2017.1418852. [PMID: 29265900]
  • Amanda M Henderson, Rika E Aleliunas, Su Peng Loh, Geok Lin Khor, Sarah Harvey-Leeson, Melissa B Glier, David D Kitts, Tim J Green, Angela M Devlin. l-5-Methyltetrahydrofolate Supplementation Increases Blood Folate Concentrations to a Greater Extent than Folic Acid Supplementation in Malaysian Women. The Journal of nutrition. 2018 06; 148(6):885-890. doi: 10.1093/jn/nxy057. [PMID: 29878267]
  • Ming Zhang, Maya R Sternberg, Christine M Pfeiffer. Harmonizing the Calibrator and Microorganism Used in the Folate Microbiological Assay Increases the Comparability of Serum and Whole-Blood Folate Results in a CDC Round-Robin Study. The Journal of nutrition. 2018 05; 148(5):807-817. doi: 10.1093/jn/nxy030. [PMID: 30053280]
  • Soo-Sang Kang, Robert S Rosenson. Analytic Approaches for the Treatment of Hyperhomocysteinemia and Its Impact on Vascular Disease. Cardiovascular drugs and therapy. 2018 04; 32(2):233-240. doi: 10.1007/s10557-018-6790-1. [PMID: 29679304]
  • Steven W Bailey, June E Ayling. The pharmacokinetic advantage of 5-methyltetrahydrofolate for minimization of the risk for birth defects. Scientific reports. 2018 03; 8(1):4096. doi: 10.1038/s41598-018-22191-2. [PMID: 29511242]
  • J L Roffman, L J Petruzzi, A S Tanner, H E Brown, H Eryilmaz, N F Ho, M Giegold, N J Silverstein, T Bottiglieri, D S Manoach, J W Smoller, D C Henderson, D C Goff. Biochemical, physiological and clinical effects of l-methylfolate in schizophrenia: a randomized controlled trial. Molecular psychiatry. 2018 02; 23(2):316-322. doi: 10.1038/mp.2017.41. [PMID: 28289280]
  • Ewa Sicińska, Anna Brzozowska, Wojciech Roszkowski, Paul M Finglas. Supplementation with [6S]-5-methyltetrahydrofolate or folic acid equally reduces serum homocysteine concentrations in older adults. International journal of food sciences and nutrition. 2018 Feb; 69(1):64-73. doi: 10.1080/09637486.2017.1320536. [PMID: 28460586]
  • Desiree Smith, Jacqueline Hornstra, Monica Rocha, Gerrit Jansen, Yehuda Assaraf, Inbal Lasry, Henk Blom, Yvo M Smulders. Folic Acid Impairs the Uptake of 5-Methyltetrahydrofolate in Human Umbilical Vascular Endothelial Cells. Journal of cardiovascular pharmacology. 2017 Oct; 70(4):271-275. doi: 10.1097/fjc.0000000000000514. [PMID: 28991880]
  • Zia Fazili, Maya R Sternberg, Neelima Paladugula, Christine M Pfeiffer. Two International Round-Robin Studies Showed Good Comparability of 5-Methyltetrahydrofolate but Poor Comparability of Folic Acid Measured in Serum by Different High-Performance Liquid Chromatography-Tandem Mass Spectrometry Methods. The Journal of nutrition. 2017 09; 147(9):1815-1825. doi: 10.3945/jn.117.254144. [PMID: 28768831]
  • Maria G Kakkoura, Kleitos Sokratous, Christiana A Demetriou, Maria A Loizidou, Giorgos Loucaides, Eleni Kakouri, Andreas Hadjisavvas, Kyriacos Kyriacou. Mediterranean diet-gene interactions: A targeted metabolomics study in Greek-Cypriot women. Molecular nutrition & food research. 2017 04; 61(4):. doi: 10.1002/mnfr.201600558. [PMID: 27860207]
  • Sarah Meadows. Multiplex Measurement of Serum Folate Vitamers by UPLC-MS/MS. Methods in molecular biology (Clifton, N.J.). 2017; 1546(?):245-256. doi: 10.1007/978-1-4939-6730-8_21. [PMID: 27896774]
  • A de Ambrosis, S Vishnumohan, J Paterson, P Haber, J Arcot. Relative bioavailability of 13C5-folic acid in pectin-coated folate fortified rice in humans using stable isotope techniques. European journal of clinical nutrition. 2017 01; 71(1):103-106. doi: 10.1038/ejcn.2016.122. [PMID: 27460262]
  • Aikaterini Oikonomidi, Piotr Lewczuk, Johannes Kornhuber, Yvo Smulders, Michael Linnebank, Alexander Semmler, Julius Popp. Homocysteine metabolism is associated with cerebrospinal fluid levels of soluble amyloid precursor protein and amyloid beta. Journal of neurochemistry. 2016 10; 139(2):324-332. doi: 10.1111/jnc.13766. [PMID: 27507672]
  • Małgorzata Bednarska-Makaruk, Ałła Graban, Agata Sobczyńska-Malefora, Dominic J Harrington, Michael Mitchell, Kieran Voong, Letian Dai, Wanda Łojkowska, Anna Bochyńska, Danuta Ryglewicz, Anna Wiśniewska, Hanna Wehr. Homocysteine metabolism and the associations of global DNA methylation with selected gene polymorphisms and nutritional factors in patients with dementia. Experimental gerontology. 2016 08; 81(?):83-91. doi: 10.1016/j.exger.2016.05.002. [PMID: 27167582]
  • Niccolò Miraglia, Marco Agostinetto, Davide Bianchi, Ermanno Valoti. Enhanced oral bioavailability of a novel folate salt: comparison with folic acid and a calcium folate salt in a pharmacokinetic study in rats. Minerva ginecologica. 2016 Apr; 68(2):99-105. doi: NULL. [PMID: 27008238]
  • Tomoyuki Akiyama, Hiroko Tada, Tsugumi Shiokawa, Katsuhiro Kobayashi, Harumi Yoshinaga. Total folate and 5-methyltetrahydrofolate in the cerebrospinal fluid of children: correlation and reference values. Clinical chemistry and laboratory medicine. 2015 Nov; 53(12):2009-14. doi: 10.1515/cclm-2015-0208. [PMID: 25941913]
  • Christine M Pfeiffer, Maya R Sternberg, Zia Fazili, David A Lacher, Mindy Zhang, Clifford L Johnson, Heather C Hamner, Regan L Bailey, Jeanne I Rader, Sedigheh Yamini, R J Berry, Elizabeth A Yetley. Folate status and concentrations of serum folate forms in the US population: National Health and Nutrition Examination Survey 2011-2. The British journal of nutrition. 2015 Jun; 113(12):1965-77. doi: 10.1017/s0007114515001142. [PMID: 25917925]
  • Pasquale Ambrosino, Roberta Lupoli, Alessandro Di Minno, Assunta Nardo, Emiliana Marrone, Valentina Lupoli, Alessandra Scaravilli, Emma Mitidieri, Antonella Tufano, Matteo Nicola Dario Di Minno. Cyclic supplementation of 5-MTHF is effective for the correction of hyperhomocysteinemia. Nutrition research (New York, N.Y.). 2015 Jun; 35(6):489-95. doi: 10.1016/j.nutres.2015.02.006. [PMID: 25841618]
  • Christine M Pfeiffer, Maya R Sternberg, Zia Fazili, Elizabeth A Yetley, David A Lacher, Regan L Bailey, Clifford L Johnson. Unmetabolized folic acid is detected in nearly all serum samples from US children, adolescents, and adults. The Journal of nutrition. 2015 Mar; 145(3):520-31. doi: 10.3945/jn.114.201210. [PMID: 25733468]
  • Jeong-Hwa Choi, Zoe Yates, Charlotte Martin, Lyndell Boyd, Xiaowei Ng, Virginia Skinner, Ron Wai, Jeongseon Kim, Hae Dong Woo, Martin Veysey, Mark Lucock. Genetic Variation in Glutamate Carboxypeptidase II and Interaction with Dietary Natural Vitamin C May Predict Risk for Adenomatous Polyp Occurrence. Asian Pacific journal of cancer prevention : APJCP. 2015; 16(10):4383-6. doi: 10.7314/apjcp.2015.16.10.4383. [PMID: 26028103]
  • Sabine Mönch, Michael Netzel, Gabriele Netzel, Undine Ott, Thomas Frank, Michael Rychlik. Folate bioavailability from foods rich in folates assessed in a short term human study using stable isotope dilution assays. Food & function. 2015 Jan; 6(1):242-8. doi: 10.1039/c4fo00658e. [PMID: 25407846]
  • Jeong-hwa Choi, Zoe Yates, Charlotte Martin, Lyndell Boyd, Xiaowei Ng, Virginia Skinner, Ron Wai, Martin Veysey, Mark Lucock. Gene-Nutrient Interaction between Folate and Dihydrofolate Reductase in Risk for Adenomatous Polyp Occurrence: A Preliminary Report. Journal of nutritional science and vitaminology. 2015; 61(6):455-9. doi: 10.3177/jnsv.61.455. [PMID: 26875486]
  • Ryan S Funk, Leon van Haandel, J Steven Leeder, Mara L Becker. Folate depletion and increased glutamation in juvenile idiopathic arthritis patients treated with methotrexate. Arthritis & rheumatology (Hoboken, N.J.). 2014 Dec; 66(12):3476-85. doi: 10.1002/art.38865. [PMID: 25186097]
  • Zia Fazili, Maya R Sternberg, Neelima Paladugula, Ralph D Whitehead, Huiping Chen, Christine M Pfeiffer. The loss of 5-methyltetrahydrofolate in human serum under suboptimal preanalytical conditions can only partially be recovered by an oxidation product. The Journal of nutrition. 2014 Nov; 144(11):1873-9. doi: 10.3945/jn.114.198358. [PMID: 25332487]
  • Jianhua Wang, Xiuwei Wang, Tao Guan, Qian Xiang, Mingsheng Wang, Zhi Zhang, Zhen Guan, Guoliang Wang, Zhiqiang Zhu, Qiu Xie, Guannan Li, Jin Guo, Fang Wang, Zhengguo Zhang, Bo Niu, Ting Zhang. Analyses of copy number variation reveal putative susceptibility loci in MTX-induced mouse neural tube defects. Developmental neurobiology. 2014 Sep; 74(9):877-93. doi: 10.1002/dneu.22170. [PMID: 24515751]
  • George I Papakostas, Richard C Shelton, John M Zajecka, Teodoro Bottiglieri, Joshua Roffman, Clair Cassiello, Stephen M Stahl, Maurizio Fava. Effect of adjunctive L-methylfolate 15 mg among inadequate responders to SSRIs in depressed patients who were stratified by biomarker levels and genotype: results from a randomized clinical trial. The Journal of clinical psychiatry. 2014 Aug; 75(8):855-63. doi: 10.4088/jcp.13m08947. [PMID: 24813065]
  • Imran Patanwala, Maria J King, David A Barrett, John Rose, Ralph Jackson, Mark Hudson, Mark Philo, Jack R Dainty, Anthony J A Wright, Paul M Finglas, David E Jones. Folic acid handling by the human gut: implications for food fortification and supplementation. The American journal of clinical nutrition. 2014 Aug; 100(2):593-9. doi: 10.3945/ajcn.113.080507. [PMID: 24944062]
  • Xiuwei Wang, Ting Zhang, Xin Zhao, Zhen Guan, Zhen Wang, Zhiqiang Zhu, Qiu Xie, Jianhua Wang, Bo Niu. Quantification of folate metabolites in serum using ultraperformance liquid chromatography tandem mass spectrometry. Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 2014 Jul; 962(?):9-13. doi: 10.1016/j.jchromb.2014.05.023. [PMID: 24878879]
  • Elizabeth A Williams, Mark Welfare, Alison Spiers, Marilyn H Hill, Wendy Bal, Eileen R Gibney, Yvonne Duckworth, Hilary J Powers, John C Mathers. Systemic folate status, rectal mucosal folate concentration and dietary intake in patients at differential risk of bowel cancer (The FAB2 Study). European journal of nutrition. 2013 Oct; 52(7):1801-10. doi: 10.1007/s00394-012-0483-5. [PMID: 23271614]
  • Alina Andras, Gerard Stansby, Monica Hansrani. Homocysteine lowering interventions for peripheral arterial disease and bypass grafts. The Cochrane database of systematic reviews. 2013 Jul; ?(7):CD003285. doi: 10.1002/14651858.cd003285.pub2. [PMID: 23881650]
  • Luai Z Hasoun, Steven W Bailey, Kitti K Outlaw, June E Ayling. Effect of serum folate status on total folate and 5-methyltetrahydrofolate in human skin. The American journal of clinical nutrition. 2013 Jul; 98(1):42-8. doi: 10.3945/ajcn.112.057562. [PMID: 23676422]
  • Agnieszka Seremak-Mrozikiewicz. [Metafolin--alternative for folate deficiency supplementation in pregnant women]. Ginekologia polska. 2013 Jul; 84(7):641-6. doi: 10.17772/gp/1618. [PMID: 24032278]
  • Timothy J Green, Yazheng Liu, Samira Dadgar, Wangyang Li, Ruth Böhni, David D Kitts. Wheat rolls fortified with microencapsulated L-5-methyltetrahydrofolic acid or equimolar folic acid increase blood folate concentrations to a similar extent in healthy men and women. The Journal of nutrition. 2013 Jun; 143(6):867-71. doi: 10.3945/jn.113.174268. [PMID: 23616513]
  • Elodie Rozoy, Monica Araya-Farias, Stéphan Simard, David Kitts, Jean Lessard, Laurent Bazinet. Redox properties of catechins and enriched green tea extracts effectively preserve L-5-methyltetrahydrofolate: assessment using cyclic voltammetry analysis. Food chemistry. 2013 Jun; 138(2-3):1982-91. doi: 10.1016/j.foodchem.2012.09.135. [PMID: 23411334]
  • Zia Fazili, Ralph D Whitehead, Neelima Paladugula, Christine M Pfeiffer. A high-throughput LC-MS/MS method suitable for population biomonitoring measures five serum folate vitamers and one oxidation product. Analytical and bioanalytical chemistry. 2013 May; 405(13):4549-60. doi: 10.1007/s00216-013-6854-9. [PMID: 23462981]
  • Perla A Ramos-Parra, Carolina García-Salinas, Carmen Hernández-Brenes, Rocío I Díaz de la Garza. Folate levels and polyglutamylation profiles of papaya (Carica papaya cv. Maradol) during fruit development and ripening. Journal of agricultural and food chemistry. 2013 Apr; 61(16):3949-56. doi: 10.1021/jf305364x. [PMID: 23574547]
  • R E Frye, J M Sequeira, E V Quadros, S J James, D A Rossignol. Cerebral folate receptor autoantibodies in autism spectrum disorder. Molecular psychiatry. 2013 Mar; 18(3):369-81. doi: 10.1038/mp.2011.175. [PMID: 22230883]
  • Yazheng Liu, Timothy J Green, Philip Wong, David D Kitts. Microencapsulation of L-5-methyltetrahydrofolic acid with ascorbate improves stability in baked bread products. Journal of agricultural and food chemistry. 2013 Jan; 61(1):247-54. doi: 10.1021/jf304229b. [PMID: 23234354]
  • Katey L Witham, Neville J Butcher, Kim S Sugamori, Debbie Brenneman, Denis M Grant, Rodney F Minchin. 5-methyl-tetrahydrofolate and the S-adenosylmethionine cycle in C57BL/6J mouse tissues: gender differences and effects of arylamine N-acetyltransferase-1 deletion. PloS one. 2013; 8(10):e77923. doi: 10.1371/journal.pone.0077923. [PMID: 24205029]
  • Melinda Farkas, Salla Keskitalo, Desiree E C Smith, Nadja Bain, Alexander Semmler, Benjamin Ineichen, Yvo Smulders, Henk Blom, Luka Kulic, Michael Linnebank. Hyperhomocysteinemia in Alzheimer's disease: the hen and the egg?. Journal of Alzheimer's disease : JAD. 2013; 33(4):1097-104. doi: 10.3233/jad-2012-121378. [PMID: 23099812]
  • Marcel Grapp, Arne Wrede, Michaela Schweizer, Sabine Hüwel, Hans-Joachim Galla, Nicolas Snaidero, Mikael Simons, Johanna Bückers, Philip S Low, Henning Urlaub, Jutta Gärtner, Robert Steinfeld. Choroid plexus transcytosis and exosome shuttling deliver folate into brain parenchyma. Nature communications. 2013; 4(?):2123. doi: 10.1038/ncomms3123. [PMID: 23828504]
  • Marta Czarnowska, Elzbieta Gujska. Effect of freezing technology and storage conditions on folate content in selected vegetables. Plant foods for human nutrition (Dordrecht, Netherlands). 2012 Dec; 67(4):401-6. doi: 10.1007/s11130-012-0312-2. [PMID: 22983767]
  • Jamal Golbahar, Esmael Mostafavi. Association between low red blood cell 5-methyltetrahydrofolate and hyperhomocysteinaemia with hypertension : a cross-sectional study. High blood pressure & cardiovascular prevention : the official journal of the Italian Society of Hypertension. 2012 Dec; 19(4):229-35. doi: 10.1007/bf03297635. [PMID: 23430668]
  • Emmanuela Prado de Paiva, Clayton Anderson de Azevedo Filho, Sabrina Gomes Ferreira, Tânia Lucia Montenegro Stamford, Jose Almiro da Paixão. Investigation of protocols to extraction and quantification of folates in vegetables matrices split into liquor and fiber fraction using factorial design. Journal of chromatography. A. 2012 Oct; 1260(?):33-41. doi: 10.1016/j.chroma.2012.08.077. [PMID: 22980643]
  • Allyson A West, Jian Yan, Cydne A Perry, Xinyin Jiang, Olga V Malysheva, Marie A Caudill. Folate-status response to a controlled folate intake in nonpregnant, pregnant, and lactating women. The American journal of clinical nutrition. 2012 Oct; 96(4):789-800. doi: 10.3945/ajcn.112.037523. [PMID: 22932279]
  • Alessandra F Perna, Eleonora Violetti, Diana Lanza, Immacolata Sepe, Guido Bellinghieri, Vincenzo Savica, Domenico Santoro, Ersilia Satta, Giovanni Cirillo, Antonio Lupo, Cataldo Abaterusso, Ilaria Raiola, Paolino Raiola, Salvatore Coppola, Biagio Di Iorio, Giuseppina Tirino, Massimo Cirillo, Diego Ingrosso, Natale G De Santo. Therapy of hyperhomocysteinemia in hemodialysis patients: effects of folates and N-acetylcysteine. Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation. 2012 Sep; 22(5):507-514.e1. doi: 10.1053/j.jrn.2011.10.007. [PMID: 22226754]
  • Leon van Haandel, Mara L Becker, Todd D Williams, John F Stobaugh, J Steven Leeder. Comprehensive quantitative measurement of folate polyglutamates in human erythrocytes by ion pairing ultra-performance liquid chromatography/tandem mass spectrometry. Rapid communications in mass spectrometry : RCM. 2012 Jul; 26(14):1617-30. doi: 10.1002/rcm.6268. [PMID: 22693118]
  • Meg J Jardine, Amy Kang, Sophia Zoungas, Sankar D Navaneethan, Toshiharu Ninomiya, Sagar U Nigwekar, Martin P Gallagher, Alan Cass, Giovanni Strippoli, Vlado Perkovic. The effect of folic acid based homocysteine lowering on cardiovascular events in people with kidney disease: systematic review and meta-analysis. BMJ (Clinical research ed.). 2012 Jun; 344(?):e3533. doi: 10.1136/bmj.e3533. [PMID: 22695899]
  • David Mischoulon, Jonathan E Alpert, Erland Arning, Teodoro Bottiglieri, Maurizio Fava, George I Papakostas. Bioavailability of S-adenosyl methionine and impact on response in a randomized, double-blind, placebo-controlled trial in major depressive disorder. The Journal of clinical psychiatry. 2012 Jun; 73(6):843-8. doi: 10.4088/jcp.11m07139. [PMID: 22687580]
  • Zsila Sadighi, Ian J Butler, Mary Kay Koenig. Adult-onset cerebral folate deficiency. Archives of neurology. 2012 Jun; 69(6):778-9. doi: 10.1001/archneurol.2011.3036. [PMID: 22371854]
  • Mara L Becker, Leon van Haandel, Roger Gaedigk, Bradley Thomas, Mark F Hoeltzel, Andrew Lasky, Hongying Dai, John Stobaugh, James S Leeder. Red blood cell folate concentrations and polyglutamate distribution in juvenile arthritis: predictors of folate variability. Pharmacogenetics and genomics. 2012 Apr; 22(4):236-46. doi: 10.1097/fpc.0b013e3283500202. [PMID: 22344247]
  • Desirée E C Smith, Yvo M Smulders, Henk J Blom, Julius Popp, Frank Jessen, Alexander Semmler, Melinda Farkas, Michael Linnebank. Determinants of the essential one-carbon metabolism metabolites, homocysteine, S-adenosylmethionine, S-adenosylhomocysteine and folate, in cerebrospinal fluid. Clinical chemistry and laboratory medicine. 2012 Mar; 50(9):1641-7. doi: 10.1515/cclm-2012-0056. [PMID: 22962226]
  • Eveline E O Hagebeuk, Marinus Duran, Johannes H T M Koelman, Nicolaas G G M Abeling, Arno Vyth, Bwee-Tien Poll-The. Folinic acid supplementation in Rett syndrome patients does not influence the course of the disease: a randomized study. Journal of child neurology. 2012 Mar; 27(3):304-9. doi: 10.1177/0883073811417184. [PMID: 21868372]
  • Nissar Ahmad Wani, Abid Hamid, Krishan Lal Khanduja, Jyotdeep Kaur. Folate malabsorption is associated with down-regulation of folate transporter expression and function at colon basolateral membrane in rats. The British journal of nutrition. 2012 Mar; 107(6):800-8. doi: 10.1017/s0007114511003710. [PMID: 21861943]
  • Maria J King, Eid I Brima, Jack R Dainty, David A Barrett, Anthony J Wright, Gavin Willis, Paul M Finglas. Estimation of the 5-methyltetrahydrofolate apparent volume of distribution in humans. The Journal of nutrition. 2012 Feb; 142(2):389-95. doi: 10.3945/jn.111.143685. [PMID: 22223574]
  • Tao Huang, Mark L Wahlqvist, Duo Li. Effect of n-3 polyunsaturated fatty acid on gene expression of the critical enzymes involved in homocysteine metabolism. Nutrition journal. 2012 Jan; 11(?):6. doi: 10.1186/1475-2891-11-6. [PMID: 22260268]
  • Siaw C Liew, Esha Das-Gupta, Shew F Wong, Nagarajah Lee, Najeeb Safdar, Adawiyah Jamil. Association of methylentetraydrofolate reductase (MTHFR) 677 C > T gene polymorphism and homocysteine levels in psoriasis vulgaris patients from Malaysia: a case-control study. Nutrition journal. 2012 Jan; 11(?):1. doi: 10.1186/1475-2891-11-1. [PMID: 22217364]
  • Carmen E Perrone, Dwight A L Mattocks, Jason D Plummer, Sridar V Chittur, Rob Mohney, Katie Vignola, David S Orentreich, Norman Orentreich. Genomic and metabolic responses to methionine-restricted and methionine-restricted, cysteine-supplemented diets in Fischer 344 rat inguinal adipose tissue, liver and quadriceps muscle. Journal of nutrigenetics and nutrigenomics. 2012; 5(3):132-57. doi: 10.1159/000339347. [PMID: 23052097]
  • Ying Liu, Yi-Qun Liu, Tatsuya Morita, Makoto Mori, Kimio Sugiyama. Effect of dietary supplementation with folate on choline deficiency-induced hyperhomocysteinemia in rats. Journal of nutritional science and vitaminology. 2012; 58(1):20-8. doi: 10.3177/jnsv.58.20. [PMID: 23007063]
  • Stephan Bart, Joachim Marr, Konstanze Diefenbach, Dietmar Trummer, Carole Sampson-Landers. Folate status and homocysteine levels during a 24-week oral administration of a folate-containing oral contraceptive: a randomized, double-blind, active-controlled, parallel-group, US-based multicenter study. Contraception. 2012 Jan; 85(1):42-50. doi: 10.1016/j.contraception.2011.05.013. [PMID: 22067790]
  • Carolyn Tam, Deborah O'Connor, Gideon Koren. Circulating unmetabolized folic Acid: relationship to folate status and effect of supplementation. Obstetrics and gynecology international. 2012; 2012(?):485179. doi: 10.1155/2012/485179. [PMID: 22529856]