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https://www.readbyqxmd.com/read/29341861/genome-wide-survey-reveals-dynamic-effects-of-folate-supplement-on-dna-methylation-and-gene-expression-during-c2c12-differentiation
#1
Yi Li, Qiang Feng, Miao Guo, Yuding Wang, Yunliang Jiang, Jinyi Xing
Folic acid supplements during pregnancy can prevent neural tube defects and other developmental abnormalities. Here, we explored the effects of folate supplement on gene expression and DNA methylation during C2C12 differentiation. Based on the folic acid concentration, this study comprised three groups: low folate (L), normal folate (N), and high-folate supplement (H). Our analyses revealed that differentiation and the mRNA expression of myogenin in C2C12 cell were enhanced by folic acid, however, the overall methylation percentage in myogenin promoter between different treatment groups was not significantly different (P>0...
January 12, 2018: Physiological Genomics
https://www.readbyqxmd.com/read/29341619/a-new-folate-grafted-chitosan-derivative-to-improve-the-delivery-of-paclitaxel-loaded-solid-lipid-nanoparticles-for-lung-tumour-therapy-by-inhalation
#2
Remi Rosiere, Matthias Van Woensel, Michel Gelbcke, Véronique Mathieu, Julien Hecq, Thomas Mathivet, Marjorie Vermeersch, Pierre G Van Antwerpen, Karim Amighi, Nathalie Wauthoz
Inhaled chemotherapy for the treatment of lung tumours requires that drug delivery systems improve selectivity for cancer cells and tumour penetration and allow sufficient lung residence. To this end, we developed solid lipid nanoparticles (SLN) with modified surface properties. We successfully synthesized a new folate-grafted copolymer of polyethylene glycol (PEG) and chitosan, F-PEG-HTCC, with a PEG-graft ratio of 7% and a molecular weight range of 211-250 kDa. F-PEG-HTCC-coated, paclitaxel-loaded SLN were prepared with an encapsulation efficiency, mean diameter and zeta potential of about 100%, 250 nm and +32 mV, respectively...
January 17, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29341053/-the-use-of-anticonvulsants-and-the-levels-of-folate-vitamin-b12-and-homocysteine
#3
D Dinç, P F J Schulte
BACKGROUND Patients with epilepsy who use anticonvulsants frequently show low levels of folate and vitamin B12 and high levels of homocysteine. Patients with bipolar disorder use some anticonvulsants as mood stabilisers.<br/> AIM: To determine whether some anticonvulsants lower folate and vitamin B12 and raise homocysteine levels.<br/> METHOD: Systematic literature search to determine the relation between the anticonvulsants valproic acid, carbamazepine, lamotrigine and topiramate on the one hand and blood levels of folate, vitamin B12 and homocysteine on the other hand...
2018: Tijdschrift Voor Psychiatrie
https://www.readbyqxmd.com/read/29340279/effect-of-mthfr-a1298c-and-mtrr-a66g-genetic-mutations-on-homocysteine-levels-in-the-chinese-population-a-systematic-review-and-meta-analysis
#4
Jiancheng Wang, Nengtai Ouyang, Long Qu, Tengfei Lin, Xianglin Zhang, Yaren Yu, Chongfei Jiang, Liling Xie, Liping Wang, Zhigui Wang, Shuzhen Ren, Shizhi Chen, Jiang Huang, Fang Liu, Weiqing Huang, Xianhui Qin
Background and Objectives: The Chinese population typically has inadequate folate intake and no mandatory folic acid fortification. Methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR) are the two key regulatory enzymes in the folate/homocysteine (Hcy) metabolism. Hcy has been implicated in the pathogenesis of cardiovascular disease. We conducted a meta-analysis to assess whether the MTHFR gene A1298C and the MTRR gene A66G polymorphisms affect Hcy levels in the Chinese population...
December 2017: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/29340017/altered-gnas-imprinting-due-to-folic-acid-deficiency-contributes-to-poor-embryo-development-and-may-lead-to-neural-tube-defects
#5
Li Wang, Shaoyan Chang, Zhen Wang, Shan Wang, Junsheng Huo, Gangqiang Ding, Rui Li, Chi Liu, Shaofang Shangguan, Xiaolin Lu, Ting Zhang, Zhiyong Qiu, Jianxin Wu
Disturbed epigenetic modifications have been linked to the pathogenesis of Neural Tube Defects (NTDs) in those with folate deficiency during pregnancy. However, evidence is lacking to delineate the critical region in epigenome regulated by parental folic acid and mechanisms by which folate deficiency affects normal embryogenesis. Our data from clinical samples revealed the presence of aberrant DNA methylation in GNAS imprinting cluster in NTD samples with low folate concentrations. Results from mouse models indicated that the establishment of GNAS imprinting was influenced by both maternal and paternal folate-deficient diets...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29338573/triphenylphosphine-docetaxel-conjugate-incorporated-albumin-nanoparticles-for-cancer-treatment
#6
Gantumur Battogtokh, Oyuntuya Gotov, Jee He Kang, Jinsung Cho, Tae Ho Jeong, Ganzorig Chimed, Young Tag Ko
AIM: The objective of this study was to develop a mitochondria-targeted anticancer drug, docetaxel (DTX), for chemotherapy. MATERIALS & METHODS: The DTX was conjugated to 4-carboxybutyl triphenylphosphonium (TPP) to enhance mitochondrial targeting, and the TPP-DTX conjugate was further loaded into folate-cholesteryl albumin (FA-chol-BSA) nanoparticles (NPs) to improve its biocompatibility. RESULTS & CONCLUSION: In vitro studies showed that TPP-DTX and its NP primarily accumulated in the mitochondria; generated high reactive oxygen species, leading to mitochondrial disruption and cell apoptosis; and had a higher cytotoxicity against cancer cells...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338433/in-vivo-ovarian-cancer-gene-therapy-using-crispr-cas9-system
#7
Zhi-Yao He, Ya-Guang Zhang, Yu-Han Yang, Cui-Cui Ma, Ping Wang, Wei Du, Ling Li, Rong Xiang, Xiang-Rong Song, Xia Zhao, Shaohua Yao, Yu-Quan Wei
CRISPR-Cas9 genome editing technology holds great promise for the field of human gene therapy. However, deficiency of safe and effective delivery systems restricts the biomedical application of CRISPR-Cas9 technique. Here, we use a folate receptor-targeted liposome (F-LP) to deliver a CRISPR plasmid DNA co-expressing Cas9 and single guide RNA targeting the DNA methyltransferase 1 (DNMT1) gene of ovarian cancer. F-LP binds CRISPR plasmid (gDNMT1) efficiently and the formed lipoplex (F-LP/gDNMT1) is stable and safe for injection...
January 16, 2018: Human Gene Therapy
https://www.readbyqxmd.com/read/29336146/coordination-triggered-hierarchical-folate-zinc-supramolecular-hydrogels-leading-to-printable-biomaterials
#8
Kaerdun Liu, Shihao Zang, Rongrong Xue, Jinghui Yang, Lizhi Wang, Jianbin Huang, Yun Yan
Printable hydrogels desired in bioengineering have extremely high demands on biocompatibility and mechanic strength, which can hardly be achieved in conventional hydrogels made with biopolymers. Here we show that on employment of the strategy of coordination triggered hierarchical self-assembly of naturally occurred small molecule folic acid, supramolecular hydrogels with robust mechanical elastic modulus comparable to synthetic double network (DN) polymer gels can be made at concentrations below 1 %. A sequence of hierarchical steps are involved in the formation of this extraordinary hydrogel: petrin rings on folate form tetramers through hydrogen bonding, tetramers stack into nanofibers by π-π stacking, zinc ions cross-link the nanofibers into larger scale fibrils, and further crosslink the fibril network to gel water...
January 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29334793/controlled-synthesis-and-size-effects-of-multifunctional-mesoporous-silica-nanosystem-for-precise-cancer-therapy
#9
Bin Ma, Lizhen He, Yuanyuan You, Jianbin Mo, Tianfeng Chen
Nanomaterials-based drug delivery systems display potent applications in cancer therapy, owing to the enhanced permeability and retention effect and diversified chemical modification. In this study, we have tailored and synthesized different sized mesoporous silica nanoparticles (MSNs) through reactant control to investigate the relevancy of nanoparticle size toward anticancer efficacy and suppressing cancer multidrug resistance. The different sized MSNs loaded with anticancer ruthenium complex (RuPOP) and conjugated with folate acid (FA) to enhance the selectivity between cancer and normal cells...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29334247/development-of-fisetin-loaded-folate-functionalized-pluronic-micelles-for-breast-cancer-targeting
#10
Atmaram Pawar, Srishti Singh, S Rajalakshmi, Karimunnisa Shaikh, C Bothiraja
The natural flavonoid fisetin (FS) has shown anticancer properties but its in-vivo administration remains challenging due to its poor aqueous solubility. The aim of the study was to develop FS loaded pluronic127 (PF)-folic acid (FA) conjugated micelles (FS-PF-FA) by the way of increasing solubility, bioavailability and active targetability of FS shall increase its therapeutic efficacy. FA-conjugated PF was prepared by carbodiimide crosslinker chemistry. FS-PF-FA micelles were prepared by thin-film hydration method and evaluated in comparison with free FS and FS loaded PF micelles (FS-PF)...
January 15, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29333614/the-effect-of-risk-factor-misclassification-on-the-partial-population-attributable-risk
#11
Benedict H W Wong, Sarah B Peskoe, Donna Spiegelman
The partial population attributable risk (pPAR) is used to quantify the population-level impact of preventive interventions in a multifactorial disease setting. In this paper, we consider the effect of nondifferential risk factor misclassification on the direction and magnitude of bias of pPAR estimands and related quantities. We found that the bias in the uncorrected pPAR depends nonlinearly and nonmonotonically on the sensitivities, specificities, relative risks, and joint prevalence of the exposure of interest and background risk factors, as well as the associations between these factors...
January 15, 2018: Statistics in Medicine
https://www.readbyqxmd.com/read/29329322/methylene-tetrahydrofolate-reductase-contributes-to-allergic-airway-disease
#12
Kenneth R Eyring, Brent S Pedersen, Kenneth N Maclean, Sally P Stabler, Ivana V Yang, David A Schwartz
RATIONALE: Environmental exposures strongly influence the development and progression of asthma. We have previously demonstrated that mice exposed to a diet enriched with methyl donors during vulnerable periods of fetal development can enhance the heritable risk of allergic airway disease through epigenetic changes. There is conflicting evidence on the role of folate (one of the primary methyl donors) in modifying allergic airway disease. OBJECTIVES: We hypothesized that blocking folate metabolism through the loss of methylene-tetrahydrofolate reductase (Mthfr) activity would reduce the allergic airway disease phenotype through epigenetic mechanisms...
2018: PloS One
https://www.readbyqxmd.com/read/29326243/concentrative-transport-of-antifolates-mediated-by-the-proton-coupled-folate-transporter-pcft-slc46a1-augmentation-by-a-hepes-buffer
#13
Rongbao Zhao, Mitra Najmi, Srinivas Aluri, David C Spray, I David Goldman
The proton-coupled folate transporter (PCFT) is ubiquitously expressed in solid tumors where it delivers antifolates, particularly pemetrexed, into cancer cells. Studies on PCFT-mediated transport, to date, have focused exclusively on the influx of folates and antifolates. This paper addresses the impact of PCFT on concentrative transport, critical to the formation of the active polyglutamate congeners, and at pH levels relevant to the tumor microenvironment. A HeLa-derived cell line was employed in which folate-specific transport was mediated exclusively by PCFT...
January 11, 2018: Molecular Pharmacology
https://www.readbyqxmd.com/read/29324341/biotin-conjugated-organic-molecules-and-proteins-for-cancer-therapy-a-review
#14
Santanu Maiti, Priyankar Paira
The main transporter for biotin is sodium dependent multivitamin transporter (SMVT), which is overexpressed in various aggressive cancer cell lines such as ovarian (OV 2008, ID8), leukemia (L1210FR), mastocytoma (P815), colon (Colo-26), breast (4T1, JC, MMT06056), renal (RENCA, RD0995), and lung (M109) cancer cell lines. Furthermore, its overexpression was found higher to that of folate receptor. Therefore, biotin demand in the rapidly growing tumors is higher than normal tissues. Several biotin conjugated organic molecules has been reported here for selective delivery of the drug in cancer cell...
January 2, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29322314/cognitive-impairment-is-associated-with-elevated-serum-homocysteine-levels-among-older-adults
#15
Sunghee Kim, Bo Youl Choi, Jung Hyun Nam, Mi Kyung Kim, Dong Hoon Oh, Yoon Jung Yang
PURPOSE: The aim of this study was to examine the associations between the risk of cognitive impairment and the serum levels of folate, vitamin B12, and homocysteine (Hcy). METHODS: Subjects were persons aged 60-79 years who participated in the Yangpyeong Cohort study between 2011 and 2012. Cognitive impairment and normal subjects consisted of 100 pairs of old adults matched by age, sex, and education levels. Cognitive function was evaluated with the Korean version of the Mini-Mental State Examination for Dementia Screening (MMSE-DS)...
January 10, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29321536/enzymes-of-the-one-carbon-folate-metabolism-as-anticancer-targets-predicted-by-survival-rate-analysis
#16
Jun Koseki, Masamitsu Konno, Ayumu Asai, Hugh Colvin, Koichi Kawamoto, Naohiro Nishida, Daisuke Sakai, Toshihiro Kudo, Taroh Satoh, Yuichiro Doki, Masaki Mori, Hideshi Ishii
The significance of mitochondrial metabolism in cancer cells has recently been gaining attention. Among other findings, One-carbon folate metabolism has been reported to be closely associated with cellular characteristics in cancer. To study molecular targets for efficient cancer therapy, we investigated the association between the expressions of genes that code enzymes involved in one-carbon metabolism and survival rate of patients with adenocarcinomas of the colorectum and lung. Patients with high expression of genes that control the metabolic cycle of tetrahydrofolate (THF) in mitochondria, SHMT2, MTHFD2, and ALDH1L2, have a shorter overall survival rate compared with patients with low expression of these genes...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321350/neuro-fuzzy-model-of-homocysteine-metabolism
#17
Shaik Mohammad Naushad, Akella Radha Rama Devi, Sriraman Nivetha, Ganapathy Lakshmitha, Alex Balraj Stanley, Tajamul Hussain, Vijay Kumar Kutala
In view of well-documented association of hyperhomocysteinaemia with a wide spectrum of diseases and higher incidence of vitamin deficiencies in Indians, we proposed a mathematical model to forecast the role of demographic and genetic variables in influencing homocysteinemetabolism and investigated the influence of life style modulations in controlling homocysteine levels. Total plasma homocysteine levels were measured in fasting samples using reverse phase HPLC. Multiple linear regression (MLR) and neuro-fuzzy models were developed...
December 2017: Journal of Genetics
https://www.readbyqxmd.com/read/29320411/inihibition-of-glycolysis-by-using-a-micro-nano-lipid-bromopyruvic-chitosan-carrier-as-a-promising-tool-to-improve-treatment-of-hepatocellular-carcinoma
#18
Nemany A Hanafy, Luciana Dini, Cinzia Citti, Giuseppe Cannazza, Stefano Leporatti
Glucose consumption in many types of cancer cells, in particular hepatocellular carcinoma (HCC), was followed completely by over-expression of type II hexokinase (HKII). This evidence has been used in modern pharmacotherapy to discover therapeutic target against glycolysis in cancer cells. Bromopyruvate (BrPA) exhibits antagonist property against HKII and can be used to inhibit glycolysis. However, the clinical application of BrPA is mostly combined with inhibition effect for healthy cells particularly erythrocytes...
January 10, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29320333/prostate-specific-membrane-antigen-pet-clinical-utility-in-prostate-cancer-normal-patterns-pearls-and-pitfalls
#19
Michael S Hofman, Rodney J Hicks, Tobias Maurer, Matthias Eiber
Prostate-specific membrane antigen (PSMA) is a transmembrane glycoprotein that is overexpressed in prostate cancer. Radiolabeled small molecules that bind with high affinity to its active extracellular center have emerged as a potential new diagnostic standard of reference for prostate cancer, resulting in images with extraordinary tumor-to-background contrast. Currently, gallium 68 (68Ga)-PSMA-11 (or HBED-PSMA) is the most widely used radiotracer for PSMA positron emission tomography (PET)/computed tomography (CT) or PSMA PET/magnetic resonance (MR) imaging...
January 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29317006/secular-trends-in-regional-differences-in-nutritional-biomarkers-and-self-reported-dietary-intakes-among-american-adults-national-health-and-nutrition-examination-survey-nhanes-1988-1994-to-2009-2010
#20
Ashima K Kant, Barry I Graubard
OBJECTIVE: To understand the contribution of regional differentials in dietary exposures to regional gradients in health, we examined 20-year trends in the association of US census region of residence with nutritional biomarkers and dietary intakes of American adults. DESIGN: Observational. SETTING: The biomarker and 24 h dietary recall data were from the National Health and Nutrition Examination Surveys (NHANES) conducted during 1988-1994 and 1999-2010...
January 10, 2018: Public Health Nutrition
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