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https://www.readbyqxmd.com/read/28433747/chemical-composition-of-ocimum-sanctum-by-lc-esi-ms-ms-analysis-and-its-protective-effects-against-smoke-induced-lung-and-neuronal-tissue-damage-in-rats
#1
M P Venuprasad, Hemanth Kumar Kandikattu, Sakina Razack, Narayanappa Amruta, Farhath Khanum
Smoke induced oxidative stress is known to cause various cancers and associated health problems including lung cancer. Herbal extracts have been reported as antioxidant supplements which attenuate free radical induced oxidative damage of tissues, among which Ocimum sanctum has been reported as the elixir of life due to its innumerable health benefits. In the present study, we investigated the protective effect of O. sanctum against cracker smoke induced lung and brain tissue damage. The results of the study demonstrate that O...
April 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28433662/iron-and-thiol-redox-signaling-in-cancer-an-exquisite-balance-to-escape-ferroptosis
#2
REVIEW
Shinya Toyokuni, Fumiya Ito, Kyoko Yamashita, Yasumasa Okazaki, Shinya Akatsuka
Epidemiological data indicate a constant worldwide increase in cancer mortality, although the age of onset is increasing. Recent accumulation of genomic data on human cancer via next-generation sequencing confirmed that cancer is a disease of genome alteration. In many cancers, the Nrf2 transcription system is activated via mutations either in Nrf2 or Keap1 ubiquitin ligase, leading to persistent activation of the genes with antioxidative functions. Furthermore, deep sequencing of passenger mutations is clarifying responsible cancer causative agent(s) in each case, including aging, APOBEC activation, smoking and UV...
April 19, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28432944/phototoxic-action-of-a-zinc-ii-phthalocyanine-encapsulated-into-poloxamine-polymeric-micelles-in-2d-and-3d-colon-carcinoma-cell-cultures
#3
Nicolás Chiarante, María C García Vior, Josefina Awruch, Julieta Marino, Leonor P Roguin
Photodynamic therapy is emerging as a hopeful method for the treatment of oncological diseases. In the search of novel therapeutic strategies for colorectal cancer, in this work we reported the photocytotoxic activity of a lipophilic zinc(II) phthalocyanine on a murine colon adenocarcinoma cell line (CT26 cells). The 2,9(10),16(17),23(24) tetrakis[(2-dimethylamino)ethylsulfanyl]phthalocyaninatozinc(II), named Pc9, was encapsulated into Tetronic® 1107 polymeric poloxamine micelles (T1107) and assayed in 2D and 3D cell cultures...
April 11, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28432031/membrane-lipid-replacement-for-chronic-illnesses-aging-and-cancer-using-oral-glycerolphospholipid-formulations-with-fructooligosaccharides-to-restore-phospholipid-function-in-cellular-membranes-organelles-cells-and-tissues
#4
REVIEW
Garth L Nicolson, Michael E Ash
Membrane Lipid Replacement is the use of functional, oral supplements containing mixtures of cell membrane glycerolphospholipids, plus fructooligosaccharides (for protection against oxidative, bile acid and enzymatic damage) and antioxidants, in order to safely replace damaged, oxidized, membrane phospholipids and restore membrane, organelle, cellular and organ function. Defects in cellular and intracellular membranes are characteristic of all chronic medical conditions, including cancer, and normal processes, such as aging...
April 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28431297/nano-zirconia-evaluation-of-its-antioxidant-and-anticancer-activity
#5
Siripireddy Balaji, Badal Kumar Mandal, Shivendu Ranjan, Nandita Dasgupta, Ramalingam Chidambaram
Bioactivity of nanomaterials largely depends on its size, shape and crystalline nature. In this work, the smaller sized spherical shaped nano-zirconia (ZrO2 NPs) (of ~9 to 11nm) was fabricated and studied its biological activity especially antioxidant and cytotoxicity against human colon carcinoma (HCT-116) and human lung carcinoma (A-549) cell lines. To have its real applications in biological aspects readily available Eucalyptus globulus (E. globulus) leaf extract was used as an effective capping and reducing agent for its synthesis...
April 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28430636/exploring-the-role-of-paraoxonase-2-in-bladder-cancer-analyses-performed-on-tissue-samples-urines-and-cell-cultures
#6
Tiziana Bacchetti, Davide Sartini, Valentina Pozzi, Tiziana Cacciamani, Gianna Ferretti, Monica Emanuelli
The enzyme paraoxonase-2 (PON2) is ubiquitously expressed and exerts its antiapoptotic and antioxidative functions in several intracellular compartments.The aim of this study is to investigate the role of PON2 in bladder cancer (BC). The expression levels of PON2 in paired tumor and normal bladder tissue samples and in urinary exfoliated cells from patients affected with BC and healthy donors were evaluated. Moreover, the effect of PON2 overexpression on tumor cell proliferation and susceptibility to oxidative stress was investigated in human bladder cancer cell line T24...
February 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28429775/fucoxanthin-provides-neuroprotection-in-models-of-traumatic-brain-injury-via-the-nrf2-are-and-nrf2-autophagy-pathways
#7
Li Zhang, Handong Wang, Youwu Fan, Yongyue Gao, Xiang Li, Zhigang Hu, Ke Ding, Yujie Wang, Xiaoliang Wang
Fucoxanthin is abundant in seaweed and is considered as a powerful antioxidant. It has been proposed to possess anti-cancer, anti-obesity and anti-diabetes effects. However, its roles in brain injury models have not been fully understood. The objective of this study was to investigate the neuroprotection of fucoxanthin in models of traumatic brain injury (TBI) and the role of the nuclear factor erythroid 2-related factor 2 (Nrf2)-antioxidant-response element (ARE) and Nrf2-autophagy pathways in the putative neuroprotection...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429737/the-glutamate-cystine-xct-antiporter-antagonizes-glutamine-metabolism-and-reduces-nutrient-flexibility
#8
Chun-Shik Shin, Prashant Mishra, Jeramie D Watrous, Valerio Carelli, Marilena D'Aurelio, Mohit Jain, David C Chan
As noted by Warburg, many cancer cells depend on the consumption of glucose. We performed a genetic screen to identify factors responsible for glucose addiction and recovered the two subunits of the xCT antiporter (system xc(-)), which plays an antioxidant role by exporting glutamate for cystine. Disruption of the xCT antiporter greatly improves cell viability after glucose withdrawal, because conservation of glutamate enables cells to maintain mitochondrial respiration. In some breast cancer cells, xCT antiporter expression is upregulated through the antioxidant transcription factor Nrf2 and contributes to their requirement for glucose as a carbon source...
April 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28429624/impact-of-high-dose-oleuropein-on-cisplatin-induced-oxidative-stress-genotoxicity-and-pathological-changes-in-rat-stomach-and-lung
#9
Fatime Geyikoglu, Hatice Isikgoz, Hakan Onalan, Suat Colak, Salim Cerig, Murat Bakir, Mirkhalil Hosseinigouzdagani, Kubra Koc, Huseyin Serkan Erol, Yavuz Selim Saglam, Serkan Yildirim
The current systemic treatments of the various solid tumors involve Cisplatin (CIS)-based chemotherapy. Due to its cytotoxicity, this approach is limited. Moreover, the safety of CIS is only discussed especially in breast and stomach cancers. Therefore, we, for the first time, explored the restorative efficacy of oleuropein (OLE), in stomach and lung injuries induced by CIS. Sprague-Dawley rats were divided into eight groups: control CIS, OLE and CIS + OLE. Single dose of (7 mg/kg) CIS was administered intraperitoneally to CIS and CIS + OLE groups...
April 21, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28427863/ros-in-cancer-the-burning-question
#10
REVIEW
Iok In Christine Chio, David A Tuveson
An unanswered question in human health is whether antioxidation prevents or promotes cancer. Antioxidation has historically been viewed as chemopreventive, but emerging evidence suggests that antioxidants may be supportive of neoplasia. We posit this contention to be rooted in the fact that ROS do not operate as one single biochemical entity, but as diverse secondary messengers in cancer cells. This cautions against therapeutic strategies to increase ROS at a global level. To leverage redox alterations towards the development of effective therapies necessitates the application of biophysical and biochemical approaches to define redox dynamics and to functionally elucidate specific oxidative modifications in cancer versus normal cells...
April 17, 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/28427227/high-dose-ascorbate-and-arsenic-trioxide-selectively-kill-acute-myeloid-leukemia-and-acute-promyelocytic-leukemia-blasts-in-vitro
#11
Nélida I Noguera, Elvira Pelosi, Daniela F Angelini, Maria Liliana Piredda, Gisella Guerrera, Eleonora Piras, Luca Battistini, Lauretta Massai, Anna Berardi, Gianfranco Catalano, Laura Cicconi, Germana Castelli, Agnese D'Angiò, Luca Pasquini, Grazia Graziani, Giuseppe Fioritoni, Maria Teresa Voso, Domenico Mastrangelo, Ugo Testa, Francesco Lo-Coco
The use of high-dose ascorbate (ASC) for the treatment of human cancer has been attempted several decades ago and has been recently revived by several in vitro and in vivo studies in solid tumors. We tested the cytotoxic effects of ASC, alone or in combination with arsenic trioxide (ATO) in acute myeloid leukemia (AML) and acute promyelocytic leukemia (APL). Leukemic cell lines and primary blasts from AML and APL patients were treated with graded concentrations of ASC, alone or in association with standard concentration (1 μM) of ATO...
March 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28426875/bisphenol-a-activates-egfr-and-erk-promoting-proliferation-tumor-spheroid-formation-and-resistance-to-egfr-pathway-inhibition-in-estrogen-receptor-negative-inflammatory-breast-cancer-cells
#12
Scott J Sauer, Michael Tarpley, Imran Shah, Akshay V Save, H Kim Lyerly, Steven R Patierno, Kevin P Williams, Gayathri R Devi
Emerging evidence from epidemiological studies suggests a link between environmental chemical exposure and progression of aggressive breast cancer subtypes. Of all clinically distinct types of breast cancers, the most lethal phenotypic variant is inflammatory breast cancer (IBC). Overexpression of epidermal growth factor receptors (EGFR/HER2) along with estrogen receptor (ER) negativity is common in IBC tumor cells, which instead of a solid mass present as rapidly proliferating diffuse tumor cell clusters. Our previous studies have demonstrated a role of an adaptive response of increased antioxidants in acquired resistance to EGFR-targeting drugs in IBC...
March 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28426671/effect-of-mitochondrially-targeted-carboxy-proxyl-nitroxide-on-akt-mediated-survival-in-daudi-cells-significance-of-a-dual-mode-of-action
#13
Gokul Variar, Tarun Pant, Apoorva Singh, Abinaya Ravichandran, Sushant Swami, Balaraman Kalyanaraman, Anuradha Dhanasekaran
Vicious cycles of mutations and reactive oxygen species (ROS) generation contribute to cancer progression. The use of antioxidants to inhibit ROS generation promotes cytostasis by affecting the mutation cycle and ROS-dependent survival signaling. However, cancer cells select mutations to elevate ROS albeit maintaining mitochondrial hyperpolarization (Δψm), even under hypoxia. From this perspective, the use of drugs that disrupt both ROS generation and Δψm is a viable anticancer strategy. Hence, we studied the effects of mitochondrially targeted carboxy proxyl nitroxide (Mito-CP) and a control ten carbon TPP moiety (Dec-TPP+) in the human Burkitt lymphoma cell line (Daudi) and normal peripheral blood mononuclear cells under hypoxia and normoxia...
2017: PloS One
https://www.readbyqxmd.com/read/28425857/antioxidant-properties-of-fractions-for-unripe-fruits-of-capsicum-annuum-l-var-conoides
#14
Chung-Yi Chen, Ching-Yu Yen, Gao-Mai Shen, Tzu-Jung Yu, Yi-Shin Liao, Ru-In Jian, Sheng-Chieh Wang, Jen-Yang Tang, H-W Chang
BACKGROUND: Capsicum plant, especially for C. annuum, is an abundant resource for bioactive antioxidants, but few studies have examined the unripe fruit part of the Capsicum plant. OBJECTIVE: MeOH extract of unripe fruits of C. annuum L. var. conoides (UFCA) was chromatographed over a silica gel column using a gradient of CH2Cl2/MeOH as eluent to produce 9 fractions. Antioxidant activities are evaluated along with cell viabilities of 9 fractions of UFCA. METHOD: The antioxidant properties were analyzed in terms of total phenol content (TPC), total flavonoid content (TFC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, 2,2-azinobis (3-ethyl-benzothiazoline-6-sulfonic acid) (ABTS) radical scavenging, ferric reducing, and ferrous ion-chelating ability...
April 19, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28425269/evaluation-of-cytotoxic-membrane-and-dna-damaging-effects-of-thymus-revolutus-c%C3%A3-lak-essential-oil-on-different-cancer-cells
#15
Aysun Özkan, Ayşe Erdoğan
BACKGROUND/AIM: In this study, we evaluated Thymus revolutus Célak essential oil and its two main constituents, γ-terpinene and p-cymene, as potential oxidative agents against lung cancer and epidermoid carcinoma cells. MATERIALS AND METHODS: Cell viability assessment was made by CellTiter-Blue1397904493 cell viability and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay after treatment with 5-600 μg/mL concentrations of essential oil, γ-terpinene, and p-cymene...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28425013/cannabinoids-as-modulators-of-cell-death-clinical-applications-and-future-directions
#16
B M Fonseca, N A Teixeira, G Correia-da-Silva
Endocannabinoids are bioactive lipids that modulate various physiological processes through G-protein-coupled receptors (CB1 and CB2) and other putative targets. By sharing the activation of the same receptors, some phytocannabinoids and a multitude of synthetic cannabinoids mimic the effects of endocannabinoids. In recent years, a growing interest has been dedicated to the study of cannabinoids properties for their analgesic, antioxidant, anti-inflammatory and neuroprotective effects. In addition to these well-recognized effects, various studies suggest that cannabinoids may affect cell survival, cell proliferation or cell death...
April 20, 2017: Reviews of Physiology, Biochemistry and Pharmacology
https://www.readbyqxmd.com/read/28424758/redox-related-epigenetic-mechanisms-in-glioblastoma-nuclear-factor-erythroid-derived-2-like-2-cobalamin-and-dopamine-receptor-subtype-4
#17
Matthew Scott Schrier, Malav Suchin Trivedi, Richard Carlton Deth
Glioblastoma is an exceptionally difficult cancer to treat. Cancer is universally marked by epigenetic changes, which play key roles in sustaining a malignant phenotype, in addition to disease progression and patient survival. Studies have shown strong links between the cellular redox state and epigenetics. Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) is a redox-sensitive transcription factor that upregulates endogenous antioxidant production, and is aberrantly expressed in many cancers, including glioblastoma...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28423703/artocarpin-an-isoprenyl-flavonoid-induces-p53-dependent-or-independent-apoptosis-via-ros-mediated-mapks-and-akt-activation-in-non-small-cell-lung-cancer-cells
#18
Ming-Horng Tsai, Ju-Fang Liu, Yao-Chang Chiang, Stephen Chu-Sung Hu, Lee-Fen Hsu, Yu-Ching Lin, Zih-Chan Lin, Hui-Chun Lee, Mei-Chuan Chen, Chieh-Liang Huang, Chiang-Wen Lee
Artocarpin has been shown to exhibit cytotoxic effects on different cancer cells, including non-small cell lung carcinoma (NSCLC, A549). However, the underlying mechanisms remain unclear. Here, we explore both p53-dependent and independent apoptosis pathways in artocarpin-treated NSCLC cells. Our results showed that artocarpin rapidly induced activation of cellular protein kinases including Erk1/2, p38 and AktS473. Inhibition of these protein kinases prevented artocarpin-induced cell death. Moreover, artocarpin-induced phosphorylation of these protein kinases and apoptosis were mediated by induction of reactive oxygen species (ROS), as pretreatment with NAC (a ROS scavenger) and Apocynin (a Nox-2 inhibitor) blocked these events...
March 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423510/genistein-inhibits-the-growth-and-regulates-the-migration-and-invasion-abilities-of-melanoma-cells-via-the-fak-paxillin-and-mapk-pathways
#19
Shuna Cui, Juan Wang, Qingqing Wu, Jing Qian, Changshui Yang, Ping Bo
Genistein is one of the main components of soy-based foods, which are widely known for their many benefits, including anti-cancer, anti-inflammatory, and antioxidant effects. In this study, we investigated the anti-metastasis effects of genistein on B16F10 melanoma cells. Our results showed that genistein strongly inhibited B16F10 cell proliferation and induced apoptosis in time- and concentration-dependent manners. Genistein altered the morphology of B16F10 cells to an elongated shape with slim pseudopodia-like protrusions...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420170/fisetin-protects-pc12-cells-from-tunicamycin-mediated-cell-death-via-reactive-oxygen-species-scavenging-and-modulation-of-nrf2-driven-gene-expression-sirt1-and-mapk-signaling-in-pc12-cells
#20
Jui-Hung Yen, Pei-Shan Wu, Shu-Fen Chen, Ming-Jiuan Wu
BACKGROUND: Fisetin (3,7,3',4'-tetrahydroxyflavone) is a dietary flavonol and exhibits antioxidant, anti-inflammatory, and neuroprotective activities. However, high concentration of fisetin is reported to produce reactive oxygen species (ROS), induce endoplasmic reticulum (ER) stress and cause cytotoxicity in cancer cells. The aim of this study is to investigate the cytoprotective effects of low concentration of fisetin against tunicamycin (Tm)-mediated cytotoxicity in neuronal-like catecholaminergic PC12 cells...
April 17, 2017: International Journal of Molecular Sciences
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