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Antioxidant cancer cervical

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https://www.readbyqxmd.com/read/29774090/strong-sod2-expression-and-hpv-16-18-positivity-are-independent-events-in-cervical-cancer
#1
Silvia Helena Rabelo-Santos, Lara Termini, Enrique Boccardo, Sophie Derchain, Adhemar Longatto-Filho, Maria Antonieta Andreoli, Maria Cecília Costa, Rafaella Almeida Lima Nunes, Liliana Aparecida Lucci Ângelo-Andrade, Luisa Lina Villa, Luiz Carlos Zeferino
It is well known that persistent infection with high-risk HPV (hr-HPV), mostly HPV-16 and 18, is the main cause of cervical cancer development. Manganese superoxide dismutase (MnSOD or SOD2) are highly expressed in different neoplasia. The present study investigated SOD2 protein expression and the presence of hr-HPV types in 297 cervical samples including non-neoplastic tissue, cervical intraepithelial neoplasia grade 3 (CIN3), squamous cell carcinoma (SCC) and adenocarcinoma (ADC). Strong SOD2 expression was significantly higher in ADC (82%) than CIN3 (52%) or SCC (64%)...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29770585/exploring-the-effect-of-vitamin-e-in-cancer-chemotherapy-a-biochemical-and-biophysical-insight
#2
Mustansir Bhori, Kanchanlata Singh, Thankamani Marar, C MuraliKrishna
Many oncologists contend that patient undergoing chemotherapy must avoid antioxidant supplementation as it may interfere with the activity of the drug. In the present investigation, we have explored the influence of vitamin E, a well known antioxidant on Camptothecin (CPT), a potent anti-cancer drug induced cell apoptosis and death of cervical cancer cells. HeLa cells were treated with different concentrations of CPT in presence and absence of 100μm vitamin E. Treated cells were subjected to cytotoxicity studies, catalase assay, DNA fragmentation assay, clonogenic assay and flow cytometry based apoptosis detection...
May 16, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29681946/inhibition-of-rad51-by-sirna-and-resveratrol-sensitizes-cancer-stem-cells-derived-from-hela-cell-cultures-to-apoptosis
#3
Graciela Ruíz, Heriberto A Valencia-González, Ismael León-Galicia, Enrique García-Villa, Alejandro García-Carrancá, Patricio Gariglio
Cervical cancer is the second most frequent tumor type in women worldwide with cases developing clinical recurrence, metastasis, and chemoresistance. The cancer stem cells (CSC) may be implicated in tumor resistance to therapy. RESveratrol (RES), a natural compound, is an antioxidant with multiple beneficial activities. We previously determined that the expression of RAD51 is decreased by RES. The aim of our study was to examine molecular mechanism by which CSC from HeLa cultures exhibit chemoresistance. We hypothesized CSC repair more efficiently DNA breaks and that RAD51 plays an important role in this mechanism...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29667555/synthesis-cytotoxicity-and-antioxidant-activity-of-new-analogues-of-rc-121-synthetic-derivatives-of-somatostatin
#4
Diana Wesselinova, Emilia D Naydenova, S Staykova, I G Goshev, L Vezenkov
BACKGROUND: Based on the structure of RC-121 (D-Phe-c (Cys-Tyr-D-Trp-Lys-Val-Cys)-Thr-NH2, - synthetic derivatives of somatostatin), some analogs were synthesized and tested for in vitro cytotoxic and antioxidant activity. OBJECTIVES: The new analogs were modifyed at position 5 with Dap (diaminopropanoic acid), Dab (diaminobutanoic acid) and Orn and at position 6 with the unnatural amino acids Tle (t-leucine). METHODS: The in vitro cytotoxic effects of the substances were investigated against a panel of human tumor cell lines HT-29 (human colorectal cancer cell line), MDA-MB-23 (human breast cancer cell line), Hep G-2 (human hepatocellular carcinoma cell line) and HeLa (cervical cancer cell line)...
April 17, 2018: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/29541715/fractionation-of-the-more-active-extracts-of-geranium-molle-l-a-relationship-between-their-phenolic-profile-and-biological-activity
#5
V C Graça, Maria Inês Dias, Lillian Barros, Ricardo C Calhelha, P F Santos, Isabel C F R Ferreira
Geranium molle L., commonly known as Dove's-foot Crane's-bill or Dovesfoot Geranium, is an herbaceous plant belonging to the Geraniaceae family. Contrary to many other Geranium species, the bioactivity and the phytochemical composition of G. molle seem not to have attracted attention until a recent study from our group regarding the bioactivity of several aqueous and organic extracts of the plant. In particular, we assessed the cytotoxic activity of these extracts against several human tumor cell lines (breast, lung, cervical and hepatocellular carcinomas) and a non-tumor porcine liver primary cell line, inspired by an ethnopharmacological report describing the traditional use of this medicinal plant in some regions of Northeast Portugal for the treatment of cancer...
March 15, 2018: Food & Function
https://www.readbyqxmd.com/read/29513789/phenolic-profile-and-antioxidant-activity-from-peels-and-seeds-of-melon-cucumis-melo-l-var-reticulatus-and-their-antiproliferative-effect-in-cancer-cells
#6
P M Rolim, G P Fidelis, C E A Padilha, E S Santos, H A O Rocha, G R Macedo
Melon (Cucumis melo L.) has high economic value and in recent years, its production has increased; however, part of the fruit is wasted. Usually, inedible parts such as peel and seeds are discarded during processing and consumption. Extracts of melon residues were prepared and their phenolic compounds, antioxidants and antiproliferative activities were evaluated. Total phenolic compounds were found in hydroethanolic, hydromethanolic, and aqueous extracts, especially for melon peel (1.016 mg gallic acid equivalent/100 g)...
March 1, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29483822/human-papillomavirus-types-16-and-18-early-expressed-proteins-differentially-modulate-the-cellular-redox-state-and-dna-damage
#7
Alfredo Cruz-Gregorio, Joaquín Manzo-Merino, María Cecilia Gonzaléz-García, José Pedraza-Chaverri, Omar Noel Medina-Campos, Mahara Valverde, Emilio Rojas, María Alexandra Rodríguez-Sastre, Claudia María García-Cuellar, Marcela Lizano
Oxidative stress has been proposed as a risk factor for cervical cancer development. However, few studies have evaluated the redox state associated with human papillomavirus (HPV) infection. The aim of this work was to determine the role of the early expressed viral proteins E1, E2, E6 and E7 from HPV types 16 and 18 in the modulation of the redox state in an integral form. Therefore, generation of reactive oxygen species (ROS), concentration of reduced glutathione (GSH), levels and activity of the antioxidant enzymes catalase and superoxide dismutase (SOD) and deoxyribonucleic acid (DNA) damage, were analysed in epithelial cells ectopically expressing the viral proteins...
2018: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/29476965/garlic-green-tea-and-turmeric-extracts-mediated-green-synthesis-of-silver-nanoparticles-phytochemical-antioxidant-and-in-vitro-cytotoxicity-studies
#8
D Arumai Selvan, D Mahendiran, R Senthil Kumar, A Kalilur Rahiman
Phyto-synthesis of silver nanoparticles (AgNPs) was achieved using aqueous garlic, green tea and turmeric extracts, and characterized by different spectroscopic techniques. Phytochemical analysis revealed the presence of rich amount of biochemicals in these extracts, which serve as reducing and capping agents for converting silver nitrate into AgNPs. FT IR spectroscopy confirmed the role of biomolecules in the bioreduction and efficient stabilization of AgNPs. UV-Vis DRS spectra showed a band around 450 nm characteristics of AgNPs...
March 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29337161/cellular-redox-cancer-and-human-papillomavirus
#9
REVIEW
Alfredo Cruz-Gregorio, Joaquín Manzo-Merino, Marcela Lizano
High-risk Human Papillomavirus (HR-HPV) is the causative agent of different human cancers. A persistent HR-HPV infection alters several cellular processes involved in cell proliferation, apoptosis, immune evasion, genomic instability and transformation. Cumulative evidence from past studies indicates that HR-HPV proteins are associated with oxidative stress (OS) and has been proposed as a risk factor for cancer development. Reactive oxygen and nitrogen species (RONS) regulate a plethora of processes inducing cellular proliferation, differentiation and death...
February 15, 2018: Virus Research
https://www.readbyqxmd.com/read/29320894/biomarkers-of-tumour-redox-status-in-response-to-modulations-of-glutathione-and-thioredoxin-antioxidant-pathways
#10
Julie Kengen, Jean-Philippe Deglasse, Marie-Aline Neveu, Lionel Mignion, Céline Desmet, Florian Gourgue, Jean-Christophe Jonas, Bernard Gallez, Bénédicte F Jordan
The ability of certain cancer cells to maintain a highly reduced intracellular environment is correlated with aggressiveness and drug resistance. Since the glutathione (GSH) and thioredoxin (TRX) systems cooperate to a tight regulation of ROS in cell physiology, and to a stimulation of tumour initiation and progression, modulation of the GSH and TRX pathways are emerging as new potential targets in cancer. In vivo methods to assess changes in tumour redox status are critically needed to assess the relevance of redox-targeted agents...
February 2018: Free Radical Research
https://www.readbyqxmd.com/read/29303970/cytotoxic-effects-and-anti-angiogenesis-potential-of-pistachio-pistacia-vera-l-hulls-against-mcf-7-human-breast-cancer-cells
#11
Maryam Seifaddinipour, Reyhaneh Farghadani, Farideh Namvar, Jamaludin Mohamad, Habsah Abdul Kadir
Pistachio ( Pistacia vera L.) hulls (PVLH) represents a significant by-product of industrial pistachio processing that contains high amounta of phenolic and flavonoid compounds known to act as antioxidants. The current study was designed to evaluate the anti-tumor and anti-angiogenic potentials of PVLH extracts. The cytotoxic effects of hexane, ethyl acetate, methanol, and water PVLH extracts toward human colon cancer (HT-29 and HCT-116), breast adenocarcinoma (MCF-7), lung adenocarcinoma (H23), liver hepatocellular carcinoma (HepG2), cervical cancer (Ca Ski), and normal fibroblast (BJ-5ta) cells were assessed using a MTT cell viability assay...
January 5, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29301373/potential-anticancer-properties-of-osthol-a-comprehensive-mechanistic-review
#12
REVIEW
Yalda Shokoohinia, Fataneh Jafari, Zeynab Mohammadi, Leili Bazvandi, Leila Hosseinzadeh, Nicholas Chow, Piyali Bhattacharyya, Mohammad Hosein Farzaei, Ammad Ahmad Farooqi, Seyed Mohammad Nabavi, Mükerrem Betül Yerer, Anupam Bishayee
Cancer is caused by uncontrolled cell proliferation which has the potential to occur in different tissues and spread into surrounding and distant tissues. Despite the current advances in the field of anticancer agents, rapidly developing resistance against different chemotherapeutic drugs and significantly higher off-target effects cause millions of deaths every year. Osthol is a natural coumarin isolated from Apiaceaous plants which has demonstrated several pharmacological effects, such as antineoplastic, anti-inflammatory and antioxidant properties...
January 3, 2018: Nutrients
https://www.readbyqxmd.com/read/29279842/characterization-and-identification-of-cryptic-biopeptides-in-carya-illinoinensis-wangenh-k-koch-storage-proteins
#13
Everardo Mares-Mares, Santiago Gutiérrez-Vargas, Luis Pérez-Moreno, Leandro G Ordoñez-Acevedo, José E Barboza-Corona, Ma Fabiola León-Galván
The objective of this research was to identify and characterize the encoded peptides present in nut storage proteins of Carya illinoinensis . It was found, through in silico prediction, proteomic analysis, and MS spectrometry, that bioactive peptides were mainly found in albumin and glutelin fractions. Glutelin was the major fraction with ~53% of the nut storage proteins containing at least 21 peptides with different putative biological activities, including antihypertensives, antioxidants, immunomodulators, protease inhibitors, and inhibitors of cell cycle progression in cancer cells...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29191192/anticancer-activities-of-ethanol-extract-from-the-antarctic-freshwater-microalga-botryidiopsidaceae-sp
#14
Sung-Suk Suh, Sun-Mi Kim, Jung Eun Kim, Ju-Mi Hong, Sung Gu Lee, Ui Joung Youn, Se Jong Han, Il-Chan Kim, Sanghee Kim
BACKGROUND: Cancer is a leading cause of human death around the world and occurs through the highly complex coordination of multiple cellular pathways. Recent studies have revealed that microalgal extracts exhibit considerable pharmaceutical activities, including those against various cancer cells. Thus, microalgae are promising candidates as novel cancer therapeutic drugs. In this study, we evaluated the biological functions of the ethanolic extract of the Antarctic freshwater microalga, Bo tryidiopsidaceae sp...
December 1, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29180927/comparative-efficacy-of-epigallocatechin-3-gallate-against-h-2-o-2-induced-ros-in-cervical-cancer-biopsies-and-hela-cell-lines
#15
Sohail Hussain
Aim of the study: Antioxidants play an important role in maintaining physiological homeostasis. Recent literature emphasises the potential therapeutic effects of natural antioxidants that play anti-inflammatory and antioxidant effects applicable in preventing oxidative stress-induced injury, which characterises their pathogenesis. The goal of this study was to evaluate the protective role of EGCG on the HeLa cell line and cancerous cells. Material and methods: The HeLa cell line and cervical cancer biopsies (CCB) were treated with varying doses of antioxidants to determine their effects...
2017: Contemporary Oncology Współczesna Onkologia
https://www.readbyqxmd.com/read/29065820/recent-advances-in-antabuse-disulfiram-the-importance-of-its-metal-binding-ability-to-its-anticancer-activity
#16
REVIEW
Maricela Viola-Rhenals, Kush R Patel, Laura Jaimes-Santamaria, Guojun Wu, Jinbao Liu, Q Ping Dou
BACKGROUND: Considerable evidence demonstrates the importance of dithiocarbamates especially disulfiram as anticancer drugs. However there are no systematic reviews outlining how their metal-binding ability is related to their anticancer activity. This review aims to summarize chemical features and metal-binding activity of disulfiram and its metabolite DEDTC, and discuss different mechanisms of action of disulfiram and their contributions to the drug's anticancer activity. METHODS: We undertook a disulfiram-related search on bibliographic databases of peerreviewed research literature, including many historic papers and in vitro, in vivo, preclinical and clinical studies...
February 12, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29049940/photocatalytic-degradation-of-synthetic-food-dye-sunset-yellow-fcf-fd-c-yellow-no-6-by-ailanthus-excelsa-roxb-possessing-antioxidant-and-cytotoxic-activity
#17
Subramanyam Deepika, Rajendran Harishkumar, Murugesan Dinesh, Rajadurai Abarna, Moorthy Anbalagan, Selvaraj Mohana Roopan, Chinnadurai Immanuel Selvaraj
The purpose of our work is to identify the bioactive compounds of bark and leaves extract from Ailanthus excelsa Roxb. and to explore its effectiveness against synthetic food dye. The presence of primary and secondary metabolites was confirmed by carrying out phytochemicals analysis. With the prior knowledge accessible on the indispensable secondary metabolites holding antioxidant and cytotoxicity activity, the quantitative screening of total phenolic and flavonoid content in methanolic and aqueous extract of bark and leaves from Ailanthus excelsa were done...
December 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29039440/betulinic-acid-induces-apoptosis-by-regulating-pi3k-akt-signaling-and-mitochondrial-pathways-in-human-cervical-cancer-cells
#18
Tao Xu, Qiuying Pang, Yang Wang, Xiufeng Yan
Betulinic acid (BA), a potential anticancer compound, could induce apoptosis in human cervical cancer (HeLa) cells, but its mechanism has yet to be fully elucidated. The present study was focused on deciphering the detailed molecular mechanism of BA-induced apoptosis. In the present study, results indicated that BA was highly effective against HeLa cells via induction of time-dependent apoptosis, and the authors demonstrated that the BA treatment acted through downregulating a phosphatidylinositol 3-kinase (PI3K) subunit and suppressing the Akt phosphorylation at Thr308 and Ser473 after increasing the generation of intracellular reactive oxygen species...
September 28, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29022703/probing-the-eumelanin-silica-interface-in-chemically-engineered-bulk-hybrid-nanoparticles-for-targeted-subcellular-antioxidant-protection
#19
Brigida Silvestri, Giuseppe Vitiello, Giuseppina Luciani, Vincenzo Calcagno, Aniello Costantini, Maria Gallo, Silvia Parisi, Simona Paladino, Mariagrazia Iacomino, Gerardino D'Errico, M Federica Caso, Alessandro Pezzella, Marco d'Ischia
We disclose herein the first example of stable monodispersed hybrid nanoparticles (termed MelaSil-NPs) made up of eumelanin biopolymer intimately integrated into a silica nanoscaffold matrix and endowed with high antioxidant and cytoprotective effects associated with a specific subcellular localization. MelaSil-NPs have been fabricated by an optimized sol-gel methodology involving ammonia-induced oxidative polymerization of a covalent conjugate of the eumelanin building block 5,6-dihydroxyindole-2-carboxylic acid (DHICA) with 3-aminopropyltriethoxysilanes (APTS)...
October 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28956121/participation-of-mt3-melatonin-receptors-in-the-synergistic-effect-of-melatonin-on-cytotoxic-and-apoptotic-actions-evoked-by-chemotherapeutics
#20
Roberto Pariente, Ignacio Bejarano, Javier Espino, Ana B Rodríguez, José A Pariente
BACKGROUND: Melatonin has antitumor activity via several mechanisms including its antiproliferative and proapoptotic effects in addition to its potent antioxidant actions. Therefore, melatonin may be useful in the treatment of tumors in association with chemotherapy drugs. PURPOSE AND METHODS: This study was performed to study the role of melatonin receptors on the cytotoxicity and apoptosis induced by the chemotherapeutic agents cisplatin and 5-fluorouracil in two tumor cell lines, such as human colorectal cancer HT-29 cells and cervical cancer HeLa cells...
November 2017: Cancer Chemotherapy and Pharmacology
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