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https://www.readbyqxmd.com/read/29790047/ascorbic-acid-inhibits-cadmium-induced-disruption-of-the-blood-testis-barrier-by-regulating-oxidative-stress-mediated-p38-mapk-pathways
#1
Na Chen, Ping Su, Mei Wang, Ya-Min Li
Ascorbic acid (AA), one of the best-known reactive oxygen species (ROS) scavengers, exhibits numerous functions such as antioxidant, anti-cancer, and anti-inflammatory effects. Increasing evidence demonstrates that oxidative stress plays an important role in testicular toxicity. In the present study, we investigated the protective effect of AA against cadmium (Cd)-induced blood-testis barrier (BTB) disruption. Sprague-Dawley (SD) rats were divided into four groups: the Cd-treated group received a single dose (s...
May 22, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29788781/purines-and-triazolo-4-3-e-purines-containing-pyrazole-moiety-as-potential-anticancer-and-antioxidant-agents
#2
Omaima G Shaaban, Heba A Abd El Razik, Shams El-Dine A Shams El-Dine, Fawzia A Ashour, Alaa A El-Tombary, Ola S Afifi, Marwa M Abu-Serie
AIM: Targeting apoptosis regulators such as caspases aiming at inducing apoptosis is an attractive strategy in cancer therapy. MATERIALS & METHODS: 8-Substituted purine incorporating pyrazole moiety were designed, synthesized and evaluated for their anticancer and antioxidant activities. RESULTS: Compounds 7a and 8a displayed potent and selective anticancer activity against lung cancer A549 cell line with low cytotoxicity on peripheral blood mononuclear normal cells...
May 23, 2018: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29784329/health-and-taste-related-compounds-in-strawberries-under-various-irrigation-regimes-and-bio-stimulant-application
#3
Burcak Kapur, Mehmet Ali Sarıdaş, Eser Çeliktopuz, Ebru Kafkas, Sevgi Paydaş Kargı
Strawberry has a unique status within the fruit species in terms of health and taste related compounds. This experimental study concerned the application of a bio-stimulant at various drip irrigation levels (IR125, IR100, IR75 and IR50). The effects of the bio-stimulant (seaweed extract) on the eating quality, i.e., the taste-related (TSS, fructose, glucose, sucrose and citric, malic, l-ascorbic acid), and health-related (antioxidant activity, total phenol, myricetin and quercetin) compounds were studied in two strawberry cultivars...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29773172/seleno-l-methionine-and-l-ascorbic-acid-differentiate-the-biological-activity-of-doxorubicin-and-its-metal-complexes-as-a-new-anticancer-drugs-candidate
#4
Marzena Matejczyk, Grzegorz Świderski, Renata Świsłocka, Stanisław Józef Rosochacki, Włodzimierz Lewandowski
The most important problems of anti-cancer therapy include the toxicity of the drugs applied to healthy cells and the multi-drug cells resistance to chemotherapeutics. One of the most commonly used anticancer drugs is doxorubicin (DOX) used to treat certain leukemias and non-Hodgkin's lymphomas, as well as bladder, breast, stomach, lung, ovarian, thyroid, multiple myeloma and other cancers. Preliminary studies showed that metal complex with DOX improve its cytostatic activity with changes in their molecular structure and distribution of electrons, resulting in a substantial change of its biological activity (including antitumor activity)...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29771164/retrospective-evaluation-of-clinical-experience-with-intravenous-ascorbic-acid-in-patients-with-cancer
#5
Anthony J Bazzan, George Zabrecky, Nancy Wintering, Andrew B Newberg, Daniel A Monti
BACKGROUND: Intravenous ascorbic acid (IV AA) has been used extensively in cancer patients throughout the United States. Currently, there are limited data on the safety and clinical effects of IV AA. The purpose of this study was to expand the current literature using a retrospective analysis of adverse events and symptomatic changes of IV AA in a large sample of cancer patients. METHODS: We conducted a retrospective chart review of all patients receiving IV AA for cancer at the Thomas Jefferson University Hospital over a 7-year period...
May 1, 2018: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/29766689/furan-in-roasted-ground-and-brewed-coffee
#6
Eliza Gruczyńska, Dorota Kowalska, Mariola Kozłowska, Ewa Majewska, Katarzyna Tarnowska
Coffee is the most popular hot beverage in the world. The annual coffee production in 2010, 2014 and 2016 was 8.1, 9.0 and 9.3 million tons respectively. There are more than 100 coffee species, but only two of them: Arabica (Coffea arabica) and Robusta (Coffea canephora) have gained commercial importance. During roasting of green coffee beans not only desirable compounds are formed, that exert positive influence on the taste and flavour of coffee, but also small quantities of undesirable ones. Furan (C4H4O) is one of the latter...
2018: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/29766157/dual-acting-antitumor-pt-iv-prodrugs-of-kiteplatin-with-dichloroacetate-axial-ligands
#7
Salvatore Savino, Valentina Gandin, James D Hoeschele, Cristina Marzano, Giovanni Natile, Nicola Margiotta
With the aim to obtain dual acting drugs able to target both nuclear DNA and mitochondria, Pt(iv) kiteplatin derivatives having dichloroacetate (DCA) ligands in axial positions have been synthesized. The rather fast hydrolysis (t1/2 of ca. 1 h) and reduction (by ascorbic acid) of these Pt(iv) derivatives did not impede a potent pharmacological effect on tumor cells. Moreover, similarly to kiteplatin, also the Pt(iv)-DCA compounds proved to be capable of overcoming oxaliplatin-resistance, which is particularly important in view of the fact that metastatic colorectal cancer is the third most common cancer in males and the second in females...
May 16, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29731627/gold-nanoparticle-based-colorimetric-method-for-the-detection-of-prostate-specific-antigen
#8
Ning Xia, Dehua Deng, Yiru Wang, Chao Fang, Su-Juan Li
Background: Prostate-specific antigen (PSA), a serine protease, is a biomarker for preoperative diagnosis and screening of prostate cancer and monitoring of its posttreatment. Methods: In this work, we reported a colorimetric method for clinical detection of PSA using gold nanoparticles (AuNPs) as the reporters. The method is based on ascorbic acid (AA)-induced in situ formation of AuNPs and Cu2+ -catalyzed oxidation of AA. Specifically, HAuCl4 can be reduced into AuNPs by AA; Cu2+ ion can catalyze the oxidation of AA by O2 to inhibit the formation of AuNPs...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29703007/comparative-efficacy-of-combination-of-1-l-polyethylene-glycol-castor-oil-and-ascorbic-acid-versus-2-l-polyethylene-glycol-plus-castor-oil-versus-3-l-polyethylene-glycol-for-colon-cleansing-before-colonoscopy-study-protocol-of-a-randomized-double-blind-single
#9
Xu Tian, Wei-Qing Chen, Xiao-Ling Liu, Hui Chen, Bang-Lun Liu, Yuan-Ping Pi
Colonoscopy has been regarded as an important method of early diagnosing and treating gastrointestinal lesions; however adequate bowel preparation is critical one of many factors needed for successful colonoscopy. Although several modified or novel regimes have been developed, desired quality of bowel preparation has not yet been generated. Scattered evidences revealed that castor oil may have potential of effectively cleansing colon. It is noted that, however, prospective trial of exploring the value of castor oil in preparing bowel before colonoscopy is lacking...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29695695/-increase-in-bacterial-resistance-to-antibiotics-after-cancer-therapy-with-platinum-based-drugs
#10
V A Chistyakov, E V Prazdnova, M S Mazanko, M N Churilov, V K Chmyhalo
The use of platinum-based anticancer drugs is limited by both their side effects and their effect on normal microflora's metagenome. Drugs that possess mutagenic and genotoxic properties may cause mutations in microbial genomes that contribute to the emergence of resistance to antimicrobial preparations and the development of complications after chemotherapy. The effects of cisplatin and oxaliplatin on microorganisms were studied using bacterial biosensors - E. coli strains MG1655 pKatG-lux, which reacts to the generation of hydrogen peroxide; MG1655 pSoxS-lux, which reacts to the superoxide anion radical; and the MG1655 pColD-lux strain, which detects DNA damage...
March 2018: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/29684274/preclinical-development-of-novel-psma-targeting-radioligands-modulation-of-albumin-binding-properties-to-improve-prostate-cancer-therapy
#11
Christoph A Umbricht, Martina Benešová, Roger Schibli, Cristina Müller
The treatment of metastatic castration-resistant prostate cancer (mCRPC) remains challenging with current treatment options. The development of more effective therapies is, therefore, urgently needed. Targeted radionuclide therapy with prostate-specific membrane antigen (PSMA)-targeting ligands has revealed promising clinical results. In an effort to optimize this concept, it was the aim of this study to design and investigate PSMA ligands comprising different types of albumin binders. PSMA-ALB-53 and PSMA-ALB-56 were designed by combining the glutamate-urea-based PSMA-binding entity, a DOTA chelator and an albumin binder based on the 4-( p-iodophenyl)-moiety or p-(tolyl)-moiety...
May 2, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29650443/investigation-of-mir-136-5p-key-target-genes-and-pathways-in-lung-squamous-cell-cancer-based-on-tcga-database-and-bioinformatics-analysis
#12
Zu-Cheng Xie, Tian-Tian Li, Bin-Liang Gan, Xiang Gao, Li Gao, Gang Chen, Xiao-Hua Hu
BACKGROUND: Lung squamous cell cancer (LUSC) is a common but challenging malignancy. It is important to illuminate the molecular mechanism of LUSC. Thus, we aim to explore the molecular mechanism of miR-136-5p in relation to LUSC. METHODS: We used the Cancer Genome Atlas (TCGA) database to investigate the expression of miR-136-5p in relation to LUSC. Then, we identified the possible miR-136-5p target genes through intersection of the predicted miR-136-5p target genes and LUSC upregulated genes from TCGA...
April 5, 2018: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29629369/discovery-of-c-3-tethered-2-oxo-benzo-1-4-oxazines-as-potent-antioxidants-bio-inspired-based-design-synthesis-biological-evaluation-cytotoxic-and-in-silico-molecular-docking-studies
#13
Vashundhra Sharma, Pradeep K Jaiswal, Mukesh Saran, Dharmendra Kumar Yadav, Saloni, Manas Mathur, Ajit K Swami, Sanjeev Misra, Mi-Hyun Kim, Sandeep Chaudhary
The discovery of C-3 tethered 2-oxo-benzo[1,4]oxazines as potent antioxidants is disclosed. All the analogs 20a-20ab have been synthesized via "on water" ultrasound-assisted irradiation conditions in excellent yields (upto 98%). All the compounds have been evaluated for their in vitro antioxidant activities using DPPH free radical scavenging assay as well as FRAP assay. The result showed promising antioxidant activities having IC50 values in the range of 4.74 ± 0.08 to 92.20 ± 1.54 μg/mL taking ascorbic acid (IC50 = 4...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29601946/calculated-cell-specific-intracellular-hydrogen-peroxide-concentration-relevance-in-cancer-cell-susceptibility-during-ascorbate-therapy
#14
Dieanira Erudaitius, Jacqueline Mantooth, Andrew Huang, Jesse Soliman, Claire Doskey, Garry R Buettner, Victor G J Rodgers
The high extracellular hydrogen peroxide (H2 O2 ) concentrations generated during pharmacological ascorbate (P-AscH- ) therapy has been shown to exhibit a high flux into susceptible cancer cells leading to a decrease in clonogenic survival. It is hypothesized that the intracellular H2 O2 concentration for susceptibility is independent of cell type and that the variation observed in dosing is associated with differences in the cell-specific overall steady-state intracellular H2 O2 concentration values. The steady-state variation in intracellular H2 O2 concentration is coupled to a number of cellular specific transport and reaction factors including catalase activity and membrane permeability...
March 27, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29595860/relationship-between-copper-ii-complexes-with-foma-adhesin-fragments-of-f-nucleatum-and-colorectal-cancer-coordination-pattern-and-ability-to-promote-ros-production
#15
M K Lesiów, U K Komarnicka, K Stokowa-Sołtys, K Rolka, A Łęgowska, N Ptaszyńska, R Wieczorek, A Kyzioł, M Jeżowska-Bojczuk
The copper(ii) ion binding of the Ac-KGHGNG-NH2 and Ac-PTVHNE-NH2 fragments of FomA adhesin from Fusobacterium nucleatum was studied using potentiometry, UV-Vis, CD, EPR and DFT techniques. The coordination pattern was described in a wide range of pH values. Ligands begin interactions with metal ions using imidazole nitrogen. At pH 6.8 (a value typical of the large intestine environment), the metal ion was coordinated by the 3N donor atoms {Nim, 2 × N-amide} in both cases. However, the copper(ii) ion was bound more effectively by the Ac-PTVHNE-NH2 peptide...
March 29, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29579321/long-term-outcome-of-relapsed-acute-promyelocytic-leukemia-treated-with-oral-arsenic-trioxide-based-reinduction-and-maintenance-regimens-a-15-year-prospective-study
#16
Harinder Gill, Rita Yim, Harold K K Lee, Vivien Mak, Shek-Ying Lin, Bonnie Kho, Sze-Fai Yip, June S M Lau, Wah Li, Ho-Wan Ip, Yu-Yan Hwang, Thomas S Y Chan, Eric Tse, Wing-Yan Au, Cyrus R Kumana, Yok-Lam Kwong
BACKGROUND: For patients who have acute promyelocytic leukemia (APL) in second complete remission (CR2), optimal postremission strategies remain undefined. METHODS: The role of an oral arsenic trioxide (As2 O3 )-based regimen in the management of patients who had APL in CR2 was examined. RESULTS: Seventy-three patients with APL in first relapse (R1) were studied. Oral As2 O3 -based reinduction resulted uniformly in CR2, irrespective of previous As2 O3 exposure...
March 26, 2018: Cancer
https://www.readbyqxmd.com/read/29567393/ascorbic-acid-metabolism-and-functions-a-comparison-of-plants-and-mammals
#17
Nicholas Smirnoff
Ascorbic acid is synthesised by eukaryotes, the known exceptions being primates and some other animal groups which have lost functional gulonolactone oxidase. Prokaryotes do not synthesise ascorbate and do not need an ascorbate supply, so the functions that are essential for mammals and plants are not required or are substituted by other compounds. The ability of ascorbate to donate electrons enables it to act as a free radical scavenger and to reduce higher oxidation states of iron to Fe2+ . These reactions are the basis of its biological activity along with the relative stability of the resulting resonance stabilised monodehydroascorbate radical...
March 19, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29556134/investigation-of-nepetolide-as-a-novel-lead-compound-antioxidant-antimicrobial-cytotoxic-anticancer-anti-inflammatory-analgesic-activities-and-molecular-docking-evaluation
#18
Tanzeel Ur Rehman, Arif-Ullah Khan, Azar Abbas, Javid Hussain, Farman Ullah Khan, Kimberly Stieglitz, Shamsher Ali
In the present study, we describe various pharmacological effects and computational analysis of nepetolide, a tricyclic clerodane-type diterpene, isolated from Nepeta suavis . Nepetolide concentration-dependently (1.0-1000 µg/mL) exhibited 1,1-diphenyl,2-picrylhydrazyl free radical scavenging activity with maximum effect of 87.01 ± 1.85%, indicating its antioxidant potential, as shown by standard drug, ascorbic acid. It was moderately active against bacterial strain of Staphylococcus aureus . In brine shrimp's lethality model, nepetolide potently showed cytotoxic effect, with LC50 value of 8...
March 2018: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/29547353/pharmacological-ascorbate-as-an-adjuvant-for-enhancing-radiation-chemotherapy-responses-in-gastric-adenocarcinoma
#19
Brianne R O'Leary, Frederick K Houwen, Chase L Johnson, Bryan G Allen, James J Mezhir, Daniel J Berg, Joseph J Cullen, Douglas R Spitz
Gastric adenocarcinoma most often presents at an advanced stage and overall five-year survival of ∼30%. Pharmacological ascorbate (high-dose IV ascorbate) has been proposed as a promising nontoxic adjuvant to standard radio-chemotherapies in several cancer types. In the current study, pharmacological ascorbate (0.5-2 m M) caused a dose-dependent decrease (70-85% at 2 m M) in clonogenic survival of gastric adenocarcinoma cells (AGS and MNK-45), but was relatively nontoxic to a small intestinal epithelial nonimmortalized human cell isolate (FHs 74 Int)...
May 2018: Radiation Research
https://www.readbyqxmd.com/read/29545914/an-integrated-approach-identifies-new-oncotargets-in-melanoma
#20
Daniela Cecconi, Luca Dalle Carbonare, Antonio Mori, Samuele Cheri, Michela Deiana, Jessica Brandi, Vincenzo Degaetano, Valentina Masiero, Giulio Innamorati, Monica Mottes, Giovanni Malerba, Maria Teresa Valenti
Melanoma is an aggressive skin cancer; an early detection of the primary tumor may improve its prognosis. Despite many genes have been shown to be involved in melanoma, the full framework of melanoma transformation has not been completely explored. The characterization of pathways involved in tumor restraint in in vitro models may help to identify oncotarget genes. We therefore aimed to probe novel oncotargets through an integrated approach involving proteomic, gene expression and bioinformatic analysis We investigated molecular modulations in melanoma cells treated with ascorbic acid, which is known to inhibit cancer growth at high concentrations...
February 20, 2018: Oncotarget
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