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https://www.readbyqxmd.com/read/28735519/expression-of-the-hpv18-e6-oncoprotein-induces-dna-damage
#1
Elva I Cortés Gutiérrez, Catalina García-Vielma, Adriana Aguilar-Lemarroy, Veronica Vallejo-Ruíz, Patricia Piña-Sánchez, Pablo Zapata-Benavides, Jaime Gosalvez
This study investigated possible variations in DNA damage in HeLa cells with silenced expression of the HPV/E6 oncogene compared with HeLa cells with normal expression of the E6 oncogene using the DNA breakage detection-fluorescence in situ hybridization (DBD-FISH) technique and a whole human genome DNA probe. The variable levels of DNA breaks present were measured quantitatively using image analysis after whole-genome DNA hybridization. HeLa cells with silenced expression of the HPV18/E6 oncogene showed a significant decrease in DNA damage compared with parental cells with normal expression of the E6 oncogene...
June 15, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/28735473/low-concentration-bpaf-and-bpf-induced-cell-biological-effects-are-mediated-by-ros-in-mcf-7-breast-cancer-cells
#2
Bingli Lei, Su Sun, Jie Xu, Chenglian Feng, Yingxin Yu, Gang Xu, Minghong Wu, Wei Peng
Reactive oxygen species (ROS) induced by bisphenol A (BPA) have been implicated in cellular oxidative damage and carcinogenesis. It is not known whether the potential alternatives of BPA, bisphenol AF (BPAF), and bisphenol F (BPF) can also induce ROS involved in mediating biological responses. This study evaluated the toxicity of BPAF and BPF on cell proliferation, DNA damage, intracellular calcium homeostasis, and ROS generation in MCF-7 human breast cancer cells. The results showed that BPAF at 0.001-1 μM and BPF at 0...
July 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28735362/the-role-of-sulforaphane-in-cancer-chemoprevention-and-health-benefits-a-mini-review
#3
Reza Bayat Mokhtari, Narges Baluch, Tina S Homayouni, Zhenya Morgatskaya, Sushil Kumar, Parandis Kazemi, Herman Yeger
Cancer is a multi-stage process resulting from aberrant signaling pathways driving uncontrolled proliferation of transformed cells. The development and progression of cancer from a premalignant lesion towards a metastatic tumor requires accumulation of mutations in many regulatory genes of the cell. Different chemopreventative approaches have been sought to interfere with initiation and control malignant progression. Here we present research on dietary compounds with evidence of cancer prevention activity that highlights the potential beneficial effect of a diet rich in cruciferous vegetables...
July 23, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/28734894/glce-rs3865014-val597ile-polymorphism-is-associated-with-breast-cancer-susceptibility-and-triple-negative-breast-cancer-in-siberian-population
#4
Valentina A Belyavskaya, Tatiana Y Prudnikova, Natalya V Domanitskaya, Nikolay V Litviakov, Vladimir N Maksimov, Nadezhda V Cherdyntseva, Elvira V Grigorieva
d-Glucuronyl C5-epimerase (GLCE) is one of key enzymes in heparan sulfate biosynthesis and possesses tumour-suppressor function in breast carcinogenesis. Here, we investigated a potential involvement of GLCE polymorphism(s) in breast cancer development in Siberian women population. Comprehensive analysis of SNP databases revealed GLCE rs3865014 (Val597Ile) missense polymorphism as the main significantly present in human populations. According the TaqMan-based SNP assay, allele distributions for the rs3865014 (A>G) were similar in healthy Siberian women (n=136) and cancer patients (n=129) (A0,73:G0,27) and intermediate between the European and Asian populations, while genotype distributions were different, with the increase of AG rate in breast cancer patients (OR=1...
July 19, 2017: Gene
https://www.readbyqxmd.com/read/28734697/prognostic-significance-of-hmsh2-hmsh3-and-hmsh6-expression-in-ameloblastoma
#5
Gleyson Kleber do Amaral-Silva, Celeste Sánchez-Romero, Vivian Petersen Wagner, Manoela Domingues Martins, Hélder Antônio Rebelo Pontes, Eduardo Rodrigues Fregnani, Fernando Augusto Soares, Oslei Paes de Almeida, André Caroli Rocha, Alan Roger Santos-Silva, Felipe Paiva Fonseca, Pablo Agustin Vargas
OBJECTIVE: The aim of this study was to investigate hMutS proteins in developing human tooth, ameloblastomas, and ameloblastic carcinoma and to determine whether the expression of these proteins has any prognostic potential. STUDY DESIGN: Ten cases of developing human tooth, 39 ameloblastomas, and 2 ameloblastic carcinomas were used to determine the distribution of the proteins during the process of carcinogenesis. Simultaneously, another sample of 73 ameloblastomas was arranged in tissue microarray, and their clinical, microscopic, and radiographic features; treatment outcome; presence of BRAF-V600E mutation; and follow-up data were assessed to determine the prognostic relevance of the expression of hMutS (hMSH2, hMSH3, hMSH6) and Ki-67...
June 7, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28733896/precancerous-acf-induction-affects-their-regional-distribution-forsaking-oxidative-stress-implication-in-1-2-dimethylhydrazine-induced-colon-carcinogenesis-model
#6
Hichem Moulahoum, Andras-Laszlo Nagy, Bahia Djerdjouri, Simona Clichici
Colon cancer is thought to develop in a stepwise fashion. In this study, the relationship between aberrant crypt foci (ACF) regional distribution and oxidative stress evolution was studied in a murine model of initial colon carcinogenesis induced by dimethylhydrazine (DMH). Mice were given 2 weekly subcutaneous injections of DMH (20 mg/kg) and killed at the 10th, 12th or 14th week. ACF was scored for number, distribution and crypt multiplicity after methylene-blue coloration and histologically analyzed afterwards...
July 21, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28733876/human-papillomavirus-type-8-e7-protein-binds-nuclear-myosin-1c-and-downregulates-the-expression-of-pre-rrna
#7
Evelyn Oswald, Eileen Reinz, Renate Voit, François Aubin, Angel Alonso, Eeva Auvinen
Our aim was to search for new cellular binding partners for the E6 and E7 oncogenes of beta human papillomaviruses (HPV), whose direct role in skin carcinogenesis has not been thoroughly investigated. By employing glutathione S-transferase pulldown and coimmunoprecipitation, we identified nuclear myosin 1c as a binding partner of HPV 8 E7 protein. As nuclear myosin 1c is an essential component of the RNA polymerase I transcription complex, we studied the effects of HPV 8 E7 protein expression on ribosomal RNA (rRNA) expression...
July 21, 2017: Virus Genes
https://www.readbyqxmd.com/read/28733453/a-novel-functional-splice-variant-of-akt3-defined-by-analysis-of-alternative-splice-expression-in-hpv-positive-oropharyngeal-cancers
#8
Theresa Guo, Akihiro Sakai, Bahman Afsari, Michael Considine, Ludmila Danilova, Alexander V Favorov, Srinivasan Yegnasubramanian, Dylan Z Kelley, Emily Flam, Patrick K Ha, Zubair Khan, Sarah J Wheelan, J Silvio Gutkind, Elana J Fertig, Daria A Gaykalova, Joseph Califano
The incidence of HPV-related oropharyngeal squamous cell carcinoma (OPSCC) has increased more than 200% in the past 20 years. Recent genetic sequencing efforts have elucidated relevant genes in head and neck cancer, but HPV-related tumors have consistently shown few DNA mutations. In this study, we sought to analyze alternative splicing events (ASE) that could alter gene function independent of mutations. To identify ASE unique to HPV-related tumors, RNA sequencing was performed on 46 HPV-positive OPSCC and 25 normal tissue samples...
July 21, 2017: Cancer Research
https://www.readbyqxmd.com/read/28733220/pan-mtor-inhibitor-mln0128-is-effective-against-intrahepatic-cholangiocarcinoma-induced-in-mice-by-akt-and-yap-co-expression
#9
Shanshan Zhang, Xinhua Song, Dan Cao, Zhong Xu, Biao Fan, Li Che, Junjie Hu, Bin Chen, Mingjie Dong, Maria G Pilo, Antonio Cigliano, Katja Evert, Silvia Ribback, Frank Dombrowski, Rosa M Pascale, Antonio Cossu, Gianpaolo Vidili, Alberto Porcu, Maria M Simile, Giovanni M Pes, Gianluigi Giannelli, John Gordan, Lixin Wei, Matthias Evert, Wenming Cong, Diego F Calvisi, Xin Chen
BACKGROUND & AIMS: Intrahepatic cholangiocarcinoma (ICC) is a lethal malignancy without effective treatment options. MLN0128, a second-generation pan-mTOR inhibitor, shows efficacy for multiple tumor types. METHODS: We established a novel ICC mouse model via hydrodynamic transfection of activated forms of AKT (myr-AKT) and Yap (YapS127A) protooncogenes (that will be referred to as AKT/YapS127A). Genetic approaches were applied to study the requirement of mTORC1 and mTORC2 in mediating AKT/YapS127A driven tumorigenesis...
July 18, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28732359/resveratrol-inhibits-age-dependent-spontaneous-tumorigenesis-by-sirt1-mediated-post-translational-modulations-in-the-annual-fish-nothobranchius-guentheri
#10
Tingting Liu, Long Ma, Zhaodi Zheng, Fenglin Li, Shan Liu, Yingbo Xie, Guorong Li
Resveratrol, SIRT1 activator, inhibits carcinogenesis predominantly performed in transgenic animal models, orthotopic cancers of nude mice or different cancer cell lines, but its effects during process of spontaneous tumors using vertebrate models remain untested. Spontaneous liver neoplasm is an age-related disease and is inhibited by resveratrol in the annual fish Nothobranchius guentheri, which indicates that the fish can act as an excellent model to study spontaneous tumorigenesis. Totally, 175 fish were fed with resveratrol and another 175 fish for controls...
July 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732240/constitutive-transgene-expression-of-stem-cell-antigen-1-in-the-hair-follicle-alters-the-sensitivity-to-tumor-formation-and-progression
#11
Rikke Christensen, David M Owens, Annette C Füchtbauer, Anders Gunnarsson, Mette Ramsing, Ernst-Martin Füchtbauer, Uffe Birk Jensen
The cell surface protein Stem Cell Antigen-1 (Sca-1) marks stem or progenitor cells in several murine tissues and is normally upregulated during cancer development. Although the specific function of Sca-1 remains unknown, Sca-1 seems to play a role in proliferation, differentiation and cell migration in a number of tissues. In the skin epithelium, Sca-1 is highly expressed in the interfollicular epidermis but is absent in most compartments of the hair follicle; however, the function of Sca-1 in the skin has not been investigated...
July 8, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28731992/-effect-of-sacha-inchi-oil-plukenetiavolubilis-l-on-1-2-dimethylhydrazine-induced-colon-carcinogenesis-in-holtzman-rats
#12
César Abel Centurión-Rodríguez, Juan Jorge Huamán-Saavedra, Víctor Raúl Requena-Fuentes
OBJECTIVES: To evaluate the preventive effect of Sacha Inchi oil (SIO) on 1,2-dimethylhydrazine (DMH)-induced colon carcinogenesis (CC) in Holtzman rats. MATERIALS AND METHODS: Experimental study with 28 Holtzman male albino rats randomly distributed into 4 groups: a positive control group exposed to DMH (C1), a negative control group exposed to SIO at 150 uL/kg/day (C2), and two experimental groups exposed to DMH with SIO at 150 uL/kg/day (E1) and SIO at 300 uL/kg/day (E2)...
April 2017: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/28731139/inhibitory-effects-of-fkbp14-on-human-cervical-cancer-cells
#13
Lian-Yi Sun, Jiu-Zhi Tao, Bing Yan, Jian-Shu Lin
The FK506-binding protein 14 (FKBP14), which belongs to a subfamily of immunophilins, has been implicated in various biochemical processes. However, its effects on human cervical cancer remain to be elucidated. The present study aimed to determine the exact role of FKBP14 in human cervical cancer cell proliferation, cell cycle progression, apoptosis, invasion and migration. Cell proliferation was measured by Cell Counting Kit‑8 assay. Flow cytometry was conducted to determine the effects of FKBP14 on cell cycle progression and apoptosis...
July 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731137/phosphorylation-of-bcl-2-plays-an-important-role-in-glycochenodeoxycholate-induced-survival-and-chemoresistance-in-hcc
#14
Maojun Zhou, Qi Zhang, Jinfeng Zhao, Mingmei Liao, Sailan Wen, Manyi Yang
Hepatocellular carcinoma (HCC) is a highly malignant tumor and can evolve rapidly to resistance to chemotherapies. Glycochenodeoxycholate (GCDA), which is toxic and hydrophobic, is the main ingredient in the bile and associated with carcinogenesis of gastrointenstinal tumors. Bcl-2 is the most important anti-apoptotic protein and overexpressed in various human tumors. In the present study, we found that GCDA can induce the chemoresistance of human liver cancer cells and specific depletion of Bcl-2 by RNA interference blocks GCDA-stimulated chemoresistance, which indicate the pivotal role of Bcl-2 in such process...
July 18, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28731132/mir-374-mediates-the-malignant-transformation-of-gastric-cancer-associated-mesenchymal-stem-cells-in-an-experimental-rat-model
#15
Runbi Ji, Xu Zhang, Hui Qian, Hongbing Gu, Zixun Sun, Fei Mao, Yongmin Yan, Jingyan Chen, Zhaofeng Liang, Wenrong Xu
Mesenchymal stem cells (MSCs) are a critical component of the tumor microenvironment. Upon distinct pathological stimulus, MSCs show phenotypic and functional changes. Gastric cancer is one of the leading causes of cancer‑related deaths worldwide. The roles and mechanisms of MSCs in gastric cancer have not been well characterized. In the present study, we investigated the roles of MSCs in the malignant transformation from gastritis to gastric cancer using an N-methyl-N'-nitro-N-nitrosoguanidine (MNNG)-induced gastric cancer model...
July 18, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28730826/effect-of-carcinogen-1-2-dimethylhydrazine-treatment-on-fibre-types-in-skeletal-muscles-of-male-wistar-rats
#16
V Smerdu, M Perše
The cancerogen 1,2-dimethylhydrazine (DMH), widely used in the experimental animal model of carcinogenesis, affects various organs, but its effect on muscle fibres is unknown. To evaluate the effect of 15-week DMH treatment on the fibre size and myosin heavy chain (MyHC) isoforms, which substantially determine fibre types and their contractile characteristics, pure and hybrid fibre types were immunohistochemically determined according to the MyHC isoform expression in soleus, extensor digitorum longus, gastrocnemius medialis and lateralis muscles of DMH-treated and control male Wistar rats...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28730545/platelet-first-responders-in-wound-response-cancer-and-metastasis
#17
REVIEW
David G Menter, Scott Kopetz, Ernest Hawk, Anil K Sood, Jonathan M Loree, Paolo Gresele, Kenneth V Honn
Platelets serve as "first responders" during normal wounding and homeostasis. Arising from bone marrow stem cell lineage megakaryocytes, anucleate platelets can influence inflammation and immune regulation. Biophysically, platelets are optimized due to size and discoid morphology to distribute near vessel walls, monitor vascular integrity, and initiate quick responses to vascular lesions. Adhesion receptors linked to a highly reactive filopodia-generating cytoskeleton maximizes their vascular surface contact allowing rapid response capabilities...
July 20, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/28730507/can-we-use-diet-to-effectively-treat-esophageal-disease-a-review-of-the-current-literature
#18
REVIEW
Carolyn Newberry, Kristle Lynch
PURPOSE OF REVIEW: Esophageal diseases represent a wide variety of conditions affecting esophageal anatomy, physiology, and motility. Therapy focuses on pharmacotherapy and endoscopic or surgical management. Dietary therapy can be considered in management algorithms for specific esophageal diseases. This review focuses on outlining the literature related to dietary therapy in gastroesophageal reflux disease, eosinophilic esophagitis, Barrett's esophagus, and esophageal adenocarcinoma...
August 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28729694/paracrine-cyclooxygenase-2-activity-by-macrophages-drives-colorectal-adenoma-progression-in-the-apc-min-mouse-model-of-intestinal-tumorigenesis
#19
Mark A Hull, Richard J Cuthbert, C W Stanley Ko, Daniel J Scott, Elizabeth J Cartwright, Gillian Hawcroft, Sarah L Perry, Nicola Ingram, Ian M Carr, Alexander F Markham, Constanze Bonifer, P Louise Coletta
Genetic deletion or pharmacological inhibition of cyclooxygenase (COX)-2 abrogates intestinal adenoma development at early stages of colorectal carcinogenesis. COX-2 is localised to stromal cells (predominantly macrophages) in human and mouse intestinal adenomas. Therefore, we tested the hypothesis that paracrine Cox-2-mediated signalling from macrophages drives adenoma growth and progression in vivo in the Apc (Min/+) mouse model of intestinal tumorigenesis. Using a transgenic C57Bl/6 mouse model of Cox-2 over-expression driven by the chicken lysozyme locus (cLys-Cox-2), which directs integration site-independent, copy number-dependent transgene expression restricted to macrophages, we demonstrated that stromal macrophage Cox-2 in colorectal (but not small intestinal) adenomas from cLys-Cox-2 x Apc (Min/+) mice was associated with significantly increased tumour size (P = 0...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729023/micrornas-in-dna-damage-response-carcinogenesis-and-chemoresistance
#20
Yuanzhang Fang, Lu Zhang, Zhenghu Li, Yujing Li, Cheng Huang, Xiongbin Lu
In the classical model of tumorigenesis, cancer develops via slowly accumulating mutations that facilitate uncontrolled cell growth and allow cells to escape apoptosis. Oncogenes and tumor suppressor genes regulate the key signaling pathways involved in tumorigenesis and cancer progression. Moreover, studies indicate that MicroRNAs (MiRNAs) are also key parts of these processes. MiRNAs are short, noncoding RNAs that regulate the expression of target genes at the posttranscriptional level. By regulating the expression of numerous cytokines, MiRNAs play crucial roles in cell growth, apoptosis, and stemness maintenance...
2017: International Review of Cell and Molecular Biology
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