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Cancer chemoprevention

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https://www.readbyqxmd.com/read/29776741/a-small-diversity-library-of-%C3%AE-methyl-amide-analogs-of-sulindac-for-probing-anticancer-structure-activity-relationships
#1
Bini Mathew, Timothy S Snowden, Michele C Connelly, R Kiplin Guy, Robert C Reynolds
Non-steroidal anti-inflammatory drugs (NSAIDs) have a variety of potential indications that include management of pain and inflammation as well as chemoprevention and/or treatment of cancer. Furthermore, a specific form of ibuprofen, dexibuprofen or the S-(+) form, shows interesting neurological activities and has been proposed for the treatment of Alzheimer's disease. In a continuation of our work probing the anticancer activity of small sulindac libraries, we have prepared and screened a small diversity library of α-methyl substituted sulindac amides in the profen class...
May 10, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29775573/indole-3-carbinol-i3c-enhances-the-sensitivity-of-murine-breast-adenocarcinoma-cells-to-doxorubicin-dox-through-inhibition-of-nf-%C3%AE%C2%BA%C3%AE-blocking-angiogenesis-and-regulation-of-mitochondrial-apoptotic-pathway
#2
Subhadip Hajra, Arup Ranjan Patra, Abhishek Basu, Prosenjit Saha, Sudin Bhattacharya
Various epidemiological and preclinical studies have already established the cancer chemopreventive potential of naturally occurring glucosinolate breakdown product Indole-3-Carbinol (I3C) as well as its abilities to induce selective cell death towards malignant cell. Therefore, the objective of the present study is to improve the therapeutic efficacy and prevention of doxorubicin (DOX)-induced toxicity, by the concurrent use of Indole-3-Carbinol (I3C). In this study, I3C was administered (20 mg/kg b.w., p...
May 15, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29774312/breast-cancer-prevention-current-approaches-and-future-directions
#3
REVIEW
Edward R Sauter
The topic of breast cancer prevention is very broad. All aspects of the topic, therefore, cannot be adequately covered in a single review. The objective of this review is to discuss strategies in current use to prevent breast cancer, as well as potential approaches that could be used in the future. This review does not discuss early detection strategies for breast cancer, including breast cancer screening. The breast is the most common site among women worldwide of noncutaneous cancer. Many clinical and genetic factors have been found to increase a woman's risk of developing the disease...
April 2018: European Journal of Breast Health
https://www.readbyqxmd.com/read/29769213/chemopreventive-efficacy-of-the-cyclooxygenase-2-cox-2-inhibitor-celecoxib-is-predicted-by-adenoma-expression-of-cox-2-and-15-pgdh
#4
Jiping Wang, Nancy L Cho, Ann G Zauber, Meier Hsu, Dawn Dawson, Amitabh Srivastava, Kisha A Mitchell-Richards, Sanford D Markowitz, Monica M Bertagnolli
BACKGROUND: The APC trial showed that cyclooxygenase-2 (Cox-2) inhibitor, celecoxib, decreased adenoma development in patients at high risk for colorectal cancer. A prospectively planned analysis of the APC trial tested the hypothesis that expression of target enzymes in adenomas removed before beginning study treatment would identify individuals at high risk of adenoma development, and/or predict response to Cox-2 inhibition. METHODS: Pre-treatment adenomas were examined using immunohistochemistry (IHC) to assess expression of Cox-2 (high vs...
May 16, 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29769200/long-chain-n-3-fatty-acids-attenuate-oncogenic-kras-driven-proliferation-by-altering-plasma-membrane-nanoscale-proteolipid-composition
#5
Natividad R Fuentes, Mohamed Mlih, Rola Barhoumi, Yang-Yi Fan, Paul Hardin, Trevor J Steele, Spencer Behmer, Ian A Prior, Jason Karpac, Robert S Chapkin
Ras signaling originates from transient nanoscale compartmentalized regions of the plasma membrane composed of specific proteins and lipids. The highly specific lipid composition of these nanodomains, termed nanoclusters, facilitates effector recruitment and therefore influences signal transduction. This suggests that Ras nanocluster proteolipid composition could represent a novel target for future chemoprevention interventions. There is evidence that consumption of fish oil containing long-chain n-3 polyunsaturated fatty acids (n-3 PUFA) such as eicosapentaenoic acid (EPA, 20:5Δ5,8,11,14,17) and docosahexaenoic acid (DHA, 22:6Δ4,7,10,13,16,19) may reduce colon cancer risk in humans, yet the mechanism underlying this effect is unknown...
May 16, 2018: Cancer Research
https://www.readbyqxmd.com/read/29765532/chemopreventive-activity-of-celastrol-in-drug-resistant-human-colon-carcinoma-cell-cultures
#6
Helena Moreira, Anna Szyjka, Kazimierz Gąsiorowski
Celastrol (tripterine) a pentacyclic triterpenoid extracted from the roots of Tripterygium wilfordii Hook f., exhibits potent antioxidant and anti-inflammatory activity and also exerts important anti-cancer effects, as induction of apoptosis and lowering the level of drug resistance of several cancers. Increased level of cellular resistance to cytostatic drugs is typical for colorectal cancers, and largely determines the failure of chemotherapy for this tumor. The purpose of our research was to evaluate the chemopreventive effect of celastrol on cultures of colon cancer cells resistant to doxorubicin (LOVO/DX)...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29765153/cox-2-mediates-pro-tumorigenic-effects-of-pkc%C3%AE%C2%B5-in-prostate-cancer
#7
Rachana Garg, Jorge M Blando, Carlos J Perez, Priti Lal, Michael D Feldman, Emer M Smyth, Emanuela Ricciotti, Tilo Grosser, Fernando Benavides, Marcelo G Kazanietz
The pro-oncogenic kinase PKCε is overexpressed in human prostate cancer and cooperates with loss of the tumor suppressor Pten for the development of prostatic adenocarcinoma. However, the effectors driving PKCε-mediated phenotypes remain poorly defined. Here, using cellular and mouse models, we showed that PKCε overexpression acts synergistically with Pten loss to promote NF-κB activation and induce cyclooxygenase-2 (COX-2) expression, phenotypic traits which are also observed in human prostate tumors. Targeted disruption of PKCε from prostate cancer cells impaired COX-2 induction and PGE2 production...
May 16, 2018: Oncogene
https://www.readbyqxmd.com/read/29764806/temporal-efficacy-of-a-sulforaphane-based-broccoli-sprout-diet-in-prevention-of-breast-cancer-through-modulation-of-epigenetic-mechanisms
#8
Yuanyuan Li, Phillip Buckhaults, Shizhao Li, Trygve O Tollefsbol
Breast cancer is the most common cancer and the second leading cause of cancer death among women. An important risk factor for breast cancer is individual genetic background which is initially generated early in human life; for example, during the processes of embryogenesis and fetal development in utero. Bioactive dietary components such as sulforaphane (SFN), an isothiocyanate from cruciferous vegetables including broccoli sprouts (BSp), cabbage and kale, has been shown to reduce the risk of developing many common cancers through regulation of epigenetic mechanisms...
May 15, 2018: Cancer Prevention Research
https://www.readbyqxmd.com/read/29762477/characterization-of-curcumin-cyclodextrin-polymer-inclusion-complex-and-investigation-on-its-antioxidant-and-antiproliferative-activities
#9
Jianping Chen, Xiaoming Qin, Saiyi Zhong, Suhua Chen, Weiming Su, Ying Liu
The aims of this study were to characterize the curcumin/cyclodextrin polymer inclusion complex using X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and UV⁻vis spectroscopy, and to determine the antioxidant activity of this complex by methods of scavenging 2,2-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radicals assays and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals assays. The inhibitory effect of inclusion complex on A375 cells was also investigated by CCK-8 assay, Annexin-V/PI staining assay, and caspase activity assay...
May 15, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29761424/dietary-intake-of-total-polyphenol-and-polyphenol-classes-and-the-risk-of-colorectal-cancer-in-the-european-prospective-investigation-into-cancer-and-nutrition-epic-cohort
#10
Raul Zamora-Ros, Valerie Cayssials, Mazda Jenab, Joseph A Rothwell, Veronika Fedirko, Krasimira Aleksandrova, Anne Tjønneland, Cecilie Kyrø, Kim Overvad, Marie-Christine Boutron-Ruault, Franck Carbonnel, Yahya Mahamat-Saleh, Rudolf Kaaks, Tilman Kühn, Heiner Boeing, Antonia Trichopoulou, Elissavet Valanou, Effie Vasilopoulou, Giovanna Masala, Valeria Pala, Salvatore Panico, Rosario Tumino, Fulvio Ricceri, Elisabete Weiderpass, Marko Lukic, Torkjel M Sandanger, Cristina Lasheras, Antonio Agudo, Maria-Jose Sánchez, Pilar Amiano, Carmen Navarro, Eva Ardanaz, Emily Sonestedt, Bodil Ohlsson, Lena Maria Nilsson, Martin Rutegård, Bas Bueno-de-Mesquita, Petra H Peeters, Kay-Thee Khaw, Nicholas J Wareham, Kathryn Bradbury, Heinz Freisling, Isabelle Romieu, Amanda J Cross, Paolo Vineis, Augustin Scalbert
Polyphenols may play a chemopreventive role in colorectal cancer (CRC); however, epidemiological evidence supporting a role for intake of individual polyphenol classes, other than flavonoids is insufficient. We evaluated the association between dietary intakes of total and individual classes and subclasses of polyphenols and CRC risk and its main subsites, colon and rectum, within the European Prospective Investigation into Cancer and Nutrition (EPIC) study. The cohort included 476,160 men and women from 10 European countries...
May 15, 2018: European Journal of Epidemiology
https://www.readbyqxmd.com/read/29760543/microbiota-modification-by-probiotic-supplementation-reduces-colitis-associated-colon-cancer-in-mice
#11
Maria Carolina S Mendes, Daiane Sm Paulino, Sandra R Brambilla, Juliana A Camargo, Gabriela F Persinoti, José Barreto C Carvalheira
AIM: To investigate the effect of probiotic supplementation during the development of an experimental model of colitis associated colon cancer (CAC). METHODS: C57BL/6 mice received an intraperitoneal injection of azoxymethane (10 mg/kg), followed by three cycles of sodium dextran sulphate diluted in water (5% w/v). Probiotic group received daily a mixture of Lactobacillus acidophilus , Lactobacillus rhamnosus and Bifidobacterium bifidum . Microbiota composition was assessed by 16S rRNA Illumina HiSeq sequencing...
May 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29757351/m10-a-novel-derivative-of-myricetin-prevents-ulcerative-colitis-and-colorectal-tumor-through-attenuating-robust-endoplasmic-reticulum-stress
#12
Feng Wang, Zhi-Yu Song, Xian-Jun Qu, Feng Li, Liang Zhang, Wen-Bao Li, Shu-Xiang Cui
Chronic gut inflammation disposes to an increased risk of colitis-associated cancer (CAC). Chemoprevention is an attractive complementary strategy. We aimed to evaluate the chemopreventive effects of M10, a novel derivative of Myricetin, in the murine azoxymethane (AOM)/dextran sodium sulfate (DSS) model. Oral administration of M10 at 50-100 mg/kg once a day for consecutive 12 weeks significantly prevented ulcerative colitis and colorectal tumor. Pathological analysis of intestines showed that M10 reduced the degree of chronic inflammation and prevented the progression of colorectal tumorigenesis...
May 11, 2018: Carcinogenesis
https://www.readbyqxmd.com/read/29756671/wasabi-6-methylsulfinyl-hexyl-isothiocyanate-induces-apoptosis-in-human-colorectal-cancer-cells-through-p53-independent-mitochondrial-dysfunction-pathway
#13
Satoshi Yano, Shusong Wu, Kozue Sakao, De-Xing Hou
6-(Methylsulfinyl)hexyl isothiocyanate (6-MSITC), a major bioactive compound in Wasabi [Wasabia japonica (Miq.) Matsum.], has revealed the inhibitory effect on colon carcinogenesis in rat cancer model although the underlying mechanism is unclear. In this study, we used two types of human colorectal cancer cells (HCT116 p53+/+ and HCT116 p53-/- ) to investigate the anticancer activity and molecular mechanisms of 6-MSITC. Interestingly, 6-MSITC inhibited the cell proliferation in both types of cells with similar IC50 value although a light increase in the phosphorylation and accumulation of P53 protein was observed in HCT116 p53+/+ cells at 24 h after treatment...
May 14, 2018: BioFactors
https://www.readbyqxmd.com/read/29754265/resveratrol-analogue-e-n-2-4-methoxystyryl-phenyl-furan-2-carboxamide-induces-g-2-m-cell-cycle-arrest-through-the-activation-of-p53-p21-cip1-waf1-in-human-colorectal-hct116-cells
#14
Foo Kit Cheah, Kok Hoong Leong, Noel Francis Thomas, Hui Kee Chin, Azhar Ariffin, Khalijah Awang
Resveratrol, a naturally occurring polyphenolic antioxidant, is a potential chemoprophylactic agent for various cancers, including colorectal cancer. Although emerging evidence continually suggests that a number of resveratrol derivatives may be better cancer chemopreventive candidates than resveratrol, studies on the mechanism of action of these derivatives are limited. This is the first study which investigates the mechanism underlying the cytotoxic effect of a synthesized resveratrol analogue, (E)-N-(2-(4-methoxystyryl) phenyl) furan-2-carboxamide (CS) on colorectal cancer...
May 12, 2018: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/29749746/dithiolethiones-a-privileged-pharmacophore-for-anticancer-therapy-and-chemoprevention
#15
Mohd Imran Ansari, Mohd M Khan, Mohammad Saquib, Shahnaaz Khatoon, Mohd Kamil Hussain
Dithiolethiones are five-membered sulfur-containing cyclic scaffolds that exhibit antioxidative, anti-inflammatory, antithrombic and chemotherapeutic activities. Dithiolethiones display the chemopreventive and cytoprotective effects by activating the antioxidant response element and mounting the transcription of cytoprotective phase II enzymatic machinery. In addition, several classes of dithiolethiones efficiently modulate the activities of proteins that play crucial roles in normal and cancer cells, including glutathione S-transferase, cyclooxygenases and master regulator NF-κB...
May 11, 2018: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29748880/the-cytotoxic-effects-of-propolis-on-breast-cancer-cells-involve-pi3k-akt-and-erk1-2-pathways-mitochondrial-membrane-potential-and-reactive-oxygen-species-generation
#16
Yahima Frión-Herrera, Alexis Díaz-García, Jenny Ruiz-Fuentes, Hermis Rodríguez-Sánchez, José M Sforcin
Propolis has been extensively used to improve health and prevent inflammatory diseases. Different types of Cuban propolis (red, brown and yellow) have been documented. The purpose of this research was to investigate the cytotoxic effects of Cuban red propolis (CP) on MDA MB-231 cell line, since breast cancer is considered one of the most common causes of mortality among women. Antiproliferative and cytotoxic activity of CP against MDA MB-231 cells were determined by the 3-[4,5-dimethylth-iazol-2-yl]-2,5-diphenyl tetrazoliumbromide (MTT) and lactate dehydrogenase (LDH) assays...
May 10, 2018: Inflammopharmacology
https://www.readbyqxmd.com/read/29748795/role-of-lncrnas-as-prognostic-markers-of-hepatic-cancer-and-potential-therapeutic-targeting-by-s-adenosylmethionine-via-inhibiting-pi3k-akt-signaling-pathways
#17
Kadry M Sadek, Mohamed A Lebda, Nasr E Nasr, Sherif M Nasr, Yasser El-Sayed
Hepatic cancer (HCC) is a well-identified dilemma throughout the world, and hence, the molecular mechanisms and strategy for preventive protection against this malignancy are critical. S-adenosylmethionine (SAM) is a unique methyl granter in vast reactions, including DNA methylation, and secures the genome against hypomethylation, which is a hallmark of tumors. Consequently, SAM may control the rate of gene expression. The objective of this investigation was to evaluate the expression of long noncoding RNAs (lncRNAs) transcript involved in hepatic tumorigenesis, including additional coding CEBPA (ecCEBPA) and urothelial carcinoma related 1 (UCA1), antioxidant enzymes transcripts, and relevant signaling pathway in diethylnitrosamine (DEN)-prompted HCC along with their conceivable targeting by SAM at different stages of HCC in rats...
May 10, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29747418/chemopreventive-activities-of-sulforaphane-and-its-metabolites-in-human-hepatoma-hepg2-cells
#18
Peng Liu, Wei Wang, Zhigang Zhou, Andrew J O Smith, Richard P Bowater, Ian Michael Wormstone, Yuqiong Chen, Yongping Bao
Sulforaphane (SFN) exhibits chemopreventive effects through various mechanisms. However, few studies have focused on the bioactivities of its metabolites. Here, three metabolites derived from SFN were studied, known as sulforaphane glutathione, sulforaphane cysteine and sulforaphane- N -acetylcysteine. Their effects on cell viability, DNA damage, tumorigenicity, cell migration and adhesion were measured in human hepatoma HepG2 cells, and their anti-angiogenetic effects were determined in a 3D co-culture model of human umbilical vein endothelial cells (HUVECs) and pericytes...
May 9, 2018: Nutrients
https://www.readbyqxmd.com/read/29746932/prevention-of-carcinogenesis-and-metastasis-by-artemisinin-type-drugs
#19
Mohammed L Abba, Nitin Patil, Jörg Hendrik Leupold, Mohamed E M Saeed, Thomas Efferth, Heike Allgayer
Artemisia annua (sweet wormwood, qinhao) is an ancient Chinese herbal remedy for pyrexia. Nowadays, artemisinin (qinghaosu) and its derivatives belong to the standard therapies against malaria worldwide, and its discovery has led to the Nobel Prize in Physiology and Medicine to Youyou Tu in 2015. While most attention has been paid to the treatment of malaria, there is increasing evidence that Artemisinin-type drugs bear a considerable potential to treat and prevent cancer. Rather than reporting on therapy of cancer, this review gives a comprehensive and timely overview on the chemopreventive effects of artemisinin and its derivatives against carcinogenesis and metastasis formation, following the multistage model of carcinogenesis (initiation, promotion, progression)...
May 7, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29744602/current-clinical-topics-of-lynch-syndrome
#20
REVIEW
Kohji Tanakaya
Lynch syndrome (LS) is one of the most common genetic cancer syndromes, occurring at a rate of 1 per 250-1000 in the general population. This autosomal dominant disease is caused by a germline variant in one of the four mismatch repair genes, MSH2, MLH1, MSH6, PMS2, or the EPCAM gene. LS develops at early ages in colorectal cancer (CRC), endometrial cancer, and various other associated tumors. Accurate diagnosis of LS and utilization of various risk-reduction strategies such as surveillance, prophylactic surgery, and chemoprevention could improve clinical outcomes...
May 9, 2018: International Journal of Clinical Oncology
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