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folic acid and cancer

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https://www.readbyqxmd.com/read/28231500/silver-nanoparticle-embedded-graphene-oxide-methotrexate-for-targeted-cancer-treatment
#1
Raj Kumar Thapa, Jae Hee Kim, Jee-Heon Jeong, Beom Soo Shin, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Combination therapies are widely investigated cancer treatment modalities. Carbon based systems such as graphene oxide (GO), plasmonic nanoparticles such as silver nanoparticles (AgNPs), and the folate analog, methotrexate (MTX), have been separately studied for their potential anticancer effects. In this study, we combined these systems to develop AgNPs-embedded GO with conjugated MTX (MTX-GO/AgNPs) and studied their folate receptor-targeted anticancer effects. Results revealed successful formation of AgNPs on GO along with MTX conjugation as suggested by UV/visible, TEM, AFM, FTIR, and XRD analysis...
February 13, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28193559/dual-functional-mesoporous-silicon-nanoparticles-enhance-the-radiosensitivity-of-vpa-in-glioblastoma
#2
Hailong Zhang, Wei Zhang, Yong Zhou, Yuhua Jiang, Shupeng Li
Radiotherapy is a critical strategy and standard adjuvant approach to glioblastoma treatment. One of the major challenges facing radiotherapy is to minimize radiation damage to normal tissue without compromising therapeutic effects on cancer cells. Various agents and numerous approaches have been developed to improve the therapeutic index of radiotherapy. Among them, radiosensitizers have attracted much attention because they selectively increase susceptibility of cancer cells to radiation and thus enhance biological effectiveness of radiotherapy...
February 10, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28192920/diagnosis-therapy-integrative-systems-based-on-magnetic-rna-nanoflowers-for-co-drug-delivery-and-targeted-therapy
#3
Yingshu Guo, Shuang Li, Yujie Wang, Shusheng Zhang
This study was to develop a codrug delivery system for targeting cancer therapy based on magnetic RNA nanoflowers (RNA NF). Compared with traditional nucleic acid structure, convenient separation can be achieved by introducing magnetic nanoparticle (MNP) into RNA NF. Folic acid (FA) modified MNP/RNA NF (FA/MNP/RNA NF) was used as a targeting nanocarrier with excellent biocompatibility to overcome the nonselectivity of MNP/RNA NF. And then, anticancer drug doxorubicin (DOX) and photosensitizer 5, 10, 15, 20-tetrakis (1-methylpyridinium-4-yl) porphyrin (TMPyP4) binding with RNA NF were used as codrug cargo models...
February 8, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28191959/mitoxantrone-and-folate-tpgs2k-conjugate-hybrid-micellar-aggregates-to-circumvent-toxicity-and-enhance-efficiency-for-breast-cancer-therapy
#4
Nida El Islem Guissi, Huipeng Li, Yurui Xu, Farouk Semcheddine, Minglei Chen, Zhigui Su, Qineng Ping
Mitoxantrone (MTO) is a potent drug used to treat breast cancer; however, efforts to expand its applicability have been limited by the risk of cardiotoxicity. In this study, we successfully conjugated MTO or folic acid (FA) to a synthesized d-α-tocopheryl polyethylene glycol 2000 succinate (TPGS2k), which were short for MCT or FCT. These two micellar materials could self-assemble to form MCT micelles or MCT/FCT mixed micelles (FMCT) aiming to lower systemic toxicity, enhance entrapment efficiency and provide a platform for targeting delivery...
February 13, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28168180/association-between-nutrient-intake-and-metabolic-syndrome-in-patients-with-colorectal-cancer
#5
Hee-Sook Lim, Eung-Jin Shin, Jeong-Won Yeom, Yoon-Hyung Park, Soon-Kyung Kim
The purpose of this study was to investigate the difference of nutritional status according to metabolic syndrome in colorectal cancer patients. The subjects were divided into 2 groups (metabolic syndrome group and normal group) according to the presence or absence of metabolic syndrome in 143 patients diagnosed with colorectal cancer, and their lifestyle and nutritional status were analyzed. Recall method was used for the dietary survey, and metabolic syndrome was defined as the presence of 3 or more of waist circumference, fasting blood glucose, triglyceride, high-density lipoprotein (HDL)-cholesterol, and blood pressure...
January 2017: Clinical Nutrition Research
https://www.readbyqxmd.com/read/28155935/folate-binding-protein-therapeutic-natural-nanotechnology-for-folic-acid-methotrexate-and-leucovorin
#6
Rachel L Merzel, Sarah M Boutom, Junjie Chen, Carolina Frey, Kerby Shedden, E Neil G Marsh, Mark M Banaszak Holl
Blood serum proteins play a critical role in the transport, biodistribution, and efficacy of systemically-delivered therapeutics. Here, we have investigated the concentration- and ligand-dependent aggregation of folate binding protein (FBP), focusing in particular on folic acid, an important vitamin and targeting agent; methotrexate, an antifolate drug used to treat cancer and rheumatoid arthritis; and leucovorin which is used to decrease methotrexate toxicity. We employed atomic force microscopy to characterize, on a particle-by-particle basis, the volumes of the FBP nanoparticles that form upon ligand binding...
February 3, 2017: Nanoscale
https://www.readbyqxmd.com/read/28153257/a-supramolecular-material-for-dual-modal-imaging-and-targeted-cancer-therapy
#7
Shanyue Guan, Ruizheng Liang, Chunyang Li, Min Wei
Recently, how to design a formulation system with simultaneous diagnosis and therapy toward cancer has attracted tremendous attention. Herein, a supramolecular material was prepared via a facile method by the co-intercalation of folic acid (FA) and doxorubicin (DOX) into the gallery of Gd(3+)-doped layered double hydroxides (LDHs), followed by surface adsorption of fluorescein isothiocyanate (FITC). This supramolecular agent was proved to exhibit excellent magnetic resonance imaging (MRI) and fluorescence imaging (FI) behavior, as well as chemotherapy toward cancer (KB cell)...
April 1, 2017: Talanta
https://www.readbyqxmd.com/read/28152548/high-folic-acid-diet-enhances-tumour-growth-in-pymt-induced-breast-cancer
#8
Mariann Fagernæs Hansen, Sarah Østrup Jensen, Ernst-Martin Füchtbauer, Pia M Martensen
BACKGROUND: The B-vitamin folate is among the most studied bioactive food compound, and a dietary intake meeting the daily requirements has been found to reduce the risk of cancer and cardiovascular diseases as well as preventing neural tube defects during fetal development. Several countries have therefore introduced dietary fortification with folic acid. However, clinical and animal studies suggest that folic acid has a dual role in cancer development. METHODS: During the period of initial tumour progression, MMTV-PyMT (MMTV-polyoma virus middle T) transgenic mice were fed with normal diet and high folic acid diet...
February 2, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28150350/nutrient-intakes-and-compliance-with-nutrient-recommendations-in-children-aged-1-4-years-in-ireland
#9
J Walton, L Kehoe, B A McNulty, A P Nugent, A Flynn
BACKGROUND: The early childhood years represent a period of rapid growth and development characterised by unique requirements for energy and individual nutrients. METHODS: The present study uses data from the National Pre-School Nutrition Survey, a nationally representative sample of Irish children (1-4 years) (n = 500), aiming to estimate energy and nutrient intakes across age and compliance with recommendations (UK and European). A 4-day weighed food-record was used to collect dietary data and statistical modelling (National Cancer Institute method) was applied to estimate usual nutrient intakes...
February 2, 2017: Journal of Human Nutrition and Dietetics: the Official Journal of the British Dietetic Association
https://www.readbyqxmd.com/read/28142123/plasmonic-nanocarrier-grid-enhanced-raman-sensor-for-studies-of-anticancer-drug-delivery
#10
Katarzyna Kurzątkowska, Ty Santiago, Maria Hepel
Targeted drug delivery systems using nanoparticle nanocarriers offer remarkable promise for cancer therapy by discriminating against devastating cytotoxicity of chemotherapeutic drugs to healthy cells. To aid in the development of new drug nanocarriers, we propose a novel plasmonic nanocarrier grid-enhanced Raman sensor which can be applied for studies and testing of drug loading onto the nanocarriers, attachment of targeting ligands, dynamics of drug release, assessment of nanocarrier stability in biological environment, and general capabilities of the nanocarrier...
May 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28138029/dual-targeting-of-epithelial-ovarian-cancer-via-folate-receptor-%C3%AE-and-the-proton-coupled-folate-transporter-with-6-substituted-pyrrolo-2-3-d-pyrimidine-antifolates
#11
Zhanjun Hou, Leda Gattoc, Carrie O'Connor, Si Yang, Adrianne Wallace-Povirk, Christina George, Steve Orr, Lisa Polin, Kathryn White, Juiwanna Kushner, Robert T Morris, Aleem Gangjee, Larry H Matherly
Folate uptake in epithelial ovarian cancer (EOC) involves the reduced folate carrier (RFC) and the proton-coupled folate transporter (PCFT), both facilitative transporters, and folate receptor (FR) α. Whereas in primary EOC specimens, FRα is widely expressed and increases with tumor stage, PCFT was expressed independent of tumor stage (by real-time RT-PCR and immunohistochemistry). EOC cell line models, including cisplatin sensitive (IGROV1 and A2780) and resistant (SKOV3 and TOV112D) cells, expressed a 17-fold range of FRα and similar amounts (within ~2-fold) of PCFT...
January 30, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28123543/increased-chemosensitivity-and-radiosensitivity-of-human-breast-cancer-cell-lines-treated-with-novel-functionalized-single-walled-carbon-nanotubes
#12
Yijun Jia, Ziyi Weng, Chuanying Wang, Mingjie Zhu, Yunshu Lu, Longlong Ding, Yongkun Wang, Xianhua Cheng, Qing Lin, Kejin Wu
Hypoxia is a major cause of treatment resistance in breast cancer. Single-walled carbon nanotubes (SWCNTs) exhibit unique properties that make them promising candidates for breast cancer treatment. In the present study, a new functionalized single-walled carbon nanotube carrying oxygen was synthesized; it was determined whether this material could increase chemosensitivity and radiosensitivity of human breast cancer cell lines, and the underlying mechanisms were investigated. MDA-MB-231 cells growing in folic acid (FA) free medium, MDA-MB-231 cells growing in medium containing FA and ZR-75-1 cells were treated with chemotherapy drugs or radiotherapy with or without tombarthite-modified-FA-chitosan (R-O2-FA-CHI)-SWCNTs under hypoxic conditions, and the cell viability was determined by water-soluble tetrazolium salts-1 assay...
January 2017: Oncology Letters
https://www.readbyqxmd.com/read/28113133/boronic-acid-vs-folic-acid-a-comparison-of-the-bio-recognition-performances-by-impedimetric-cytosensors-based-on-ferrocene-cored-dendrimer
#13
Muamer Dervisevic, Mehmet Şenel, Tugba Sagir, Sevim Isik
A comparative study is reported where folic acid (FA) and boronic acid (BA) based cytosensors and their analytical performances in cancer cell detection were analyzed by using electrochemical impedance spectroscopy (EIS) method. Cytosensors were fabricated using self-assembled monolayer principle by modifying Au electrode with cysteamine (Cys) and immobilization of ferrocene cored polyamidiamine dendrimers second generation (Fc-PAMAM (G2)), after which electrodes were modified with FA and BA. Au/Fc-PAMAM(G2)/FA and Au/Fc-PAMAM(G2)/BA based cytosensors showed extremely good analytical performances in cancer cell detection with linear range of 1×10(2) to 1×10(6)cellsml(-1), detection limit of 20cellsml(-1) with incubation time of 20min for FA based electrode, and for BA based electrode detection limit was 28cellsml(-1) with incubation time of 10min...
May 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28112858/cooperative-strategies-for-enhancing-performance-of-photothermal-therapy-ptt-agent-optimizing-its-photothermal-conversion-and-cell-internalization-ability
#14
Baoji Du, Chongbo Ma, Guanyu Ding, Xu Han, Dan Li, Erkang Wang, Jin Wang
Photothermal conversion ability (PCA) and cell internalization ability (CIA) are two key factors for determining the performance of photothermal agents. The previous studies mostly focus on improving the PCA by exploring new photothermal nanomaterials. Herein, the authors take the hybrids of graphene and gold nanostar (GGN) as an example to investigate the gradually enhanced phototherapy effect by changing the PCA and CIA of photothermal therapy (PTT) agent simultaneously. Based on the GGN, the GGN and the reduced GGN protected by bovine serum albumin (BSA) or BSA-FA (folic acid) are prepared, which are named as GGNB, rGGNB, and rGGNB-FA, respectively...
January 23, 2017: Small
https://www.readbyqxmd.com/read/28110184/structural-analysis-of-binding-functionality-of-folic-acid-peg-dendrimers-against-folate-receptor
#15
Diana Sampogna-Mireles, Ingrid D Araya-Durán, Valeria Márquez-Miranda, Jesús A Valencia-Gallegos, Fernando D González-Nilo
Dendrimers functionalized with folic acid (FA) are drug delivery systems that can selectively target cancer cells with folate receptors (FR-α) overexpression. Incorporation of polyethylene glycol (PEG) can enhance dendrimers solubility and pharmacokinetics, but ligand-receptor binding must not be affected. In this work we characterized, at atomic level, the binding functionality of conventional site-specific dendrimers conjugated with FA with PEG 750 or PEG 3350 as a linker. After Molecular Dynamics simulation, we observed that both PEG's did not interfere over ligand-receptor binding functionality...
January 6, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28106163/synergistically-enhanced-selective-intracellular-uptake-of-anticancer-drug-carrier-comprising-folic-acid-conjugated-hydrogels-containing-magnetite-nanoparticles
#16
Haneul Kim, Ara Jo, Seulgi Baek, Daeun Lim, Soon-Yong Park, Soo Kyung Cho, Jin Woong Chung, Jinhwan Yoon
Targeted drug delivery has long been extensively researched since drug delivery and release at the diseased site with minimum dosage realizes the effective therapy without adverse side effects. In this work, to achieve enhanced intracellular uptake of anticancer drug carriers for efficient chemo-therapy, we have designed targeted multifunctional anticancer drug carrier hydrogels. Temperature-responsive poly(N-isopropylacrylamide) (PNIPAm) hydrogel core containing superparamagnetic magnetite nanoparticles (MNP) were prepared using precipitation polymerization, and further polymerized with amine-functionalized copolymer shell to facilitate the conjugation of targeting ligand...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098453/surface-engineered-multifunctional-eu-gd2o3-nanoplates-for-targeted-and-ph-responsive-drug-delivery-and-imaging-applications
#17
Arindam Saha, Subas Chandra Mohanta, Kashmiri Deka, Pritam Deb, Parukuttyamma Sujatha Devi
In this paper, we report the synthesis of surface-engineered multifunctional Eu:Gd2O3 triangular nanoplates with small size and uniform shape via a high-temperature solvothermal technique. Surface engineering has been performed by a one-step polyacrylate coating, followed by controlled conjugation chemistry. This creates the desired number of surface functional groups that can be used to attach folic acid as a targeting ligand on the nanoparticle surface. To specifically deliver the drug molecules in the nucleus, the folate density on the nanoparticle surface has been kept low...
February 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28098215/epigenetic-modifications-at-dmrs-of-placental-genes-are-subjected-to-variations-in-normal-gestation-pathological-conditions-and-folate-supplementation
#18
Beenish Rahat, Aatish Mahajan, Rashmi Bagga, Abid Hamid, Jyotdeep Kaur
Invasive placentation and cancer development shares many similar molecular and epigenetic pathways. Paternally expressed, growth promoting genes (SNRPN, PEG10 and MEST) which are known to play crucial role in tumorogenesis, are not well studied during placentation. This study reports for the first time of the impact of gestational-age, pathological conditions and folic acid supplementation on dynamic nature of DNA and histone methylation present at their differentially methylated regions (DMRs). Here, we reported the association between low DNA methylation/H3K27me3 and higher expression of SNRPN, PEG10 and MEST in highly proliferating normal early gestational placenta...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28096125/dietary-supplements-and-risk-of-cause-specific-death-cardiovascular-disease-and-cancer-a-systematic-review-and-meta-analysis-of-primary-prevention-trials
#19
REVIEW
Lukas Schwingshackl, Heiner Boeing, Marta Stelmach-Mardas, Marion Gottschald, Stefan Dietrich, Georg Hoffmann, Anna Chaimani
Our aim was to assess the efficacy of dietary supplements in the primary prevention of cause-specific death, cardiovascular disease (CVD), and cancer by using meta-analytical approaches. Electronic and hand searches were performed until August 2016. Inclusion criteria were as follows: 1) minimum intervention period of 12 mo; 2) primary prevention trials; 3) mean age ≥18 y; 4) interventions included vitamins, fatty acids, minerals, supplements containing combinations of vitamins and minerals, protein, fiber, prebiotics, and probiotics; and 5) primary outcome of all-cause mortality and secondary outcomes of mortality or incidence from CVD or cancer...
January 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28094532/preclinical-comparison-of-albumin-binding-radiofolates-impact-of-linker-entities-on-the-in-vitro-and-in-vivo-properties
#20
Klaudia Siwowska, Stephanie Haller, Francesca Bortoli, Martina Benešová, Viola Groehn, Peter Bernhardt, Roger Schibli, Cristina Müller
Tumor targeting with folic acid radioconjugates has been proposed as a promising strategy for radionuclide therapy of folate receptor α (FR)-positive cancer. Recently, it was shown that modification of radiofolates with an albumin-binding entity increased the tumor-to-kidney ratios of accumulated radioactivity in mice. The goal of this study was to evaluate the lead compound cm10 and compare it with new albumin-binding folate conjugates. Compound cm12 was designed with a long spacer consisting of a PEG-11 entity, and compound cm13 contained a short alkane chain between the albumin-binding moiety and folic acid...
January 17, 2017: Molecular Pharmaceutics
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