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https://www.readbyqxmd.com/read/28858732/decreased-expression-of-cytochrome-p450-1b1-in-non-small-cell-lung-cancer
#1
Bartosz Kazimierz Słowikowski, Bartłomiej Gałęcki, Wojciech Dyszkiewicz, Paweł Piotr Jagodziński
Recent studies have associated oestrogen metabolism and cigarette smoking with their carcinogenic impact on the lungs. Compounds commonly found in tobacco smoke induce the activity of CYP1B1, the enzyme responsible for the synthesis of catecholic derivatives of oestrogens. During their redox transformations, these structures can release large amounts of reactive oxygen species or can form DNA adducts, which lead to the decomposition of genetic material. This process may illustrate the synergistic effect of oestrogenic activity and tobacco combustion on oestrogen-dependant lung cancer development...
August 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28798007/industrial-pollutants-and-nasopharyngeal-cancer-an-open-question
#2
Roberto Menicagli, Gianni Bolla, Laura Menicagli, Anastassia Esseiridou
INTRODUCTION AND OBJECTIVES: Nasopharyngeal Carcinoma represents 0.7% of the total cancer cases in the world with an ASR index of 1.7 and is widely associated with Epstein-Barr virus. It is not common in Italy (ASR index of 0.5) while in China (ASR 1.9), one third of the clinical cases are observed in Guangdong (ASR index 11.3). It is also quite common in Malaysia and Indonesia. The activation of the cancerogenesis process happens after the exposure to some environmental parameters that epidemiological studies have indicated with various dietary habits, mainly for salted fish consumption...
May 2017: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28768706/the-prevalence-of-cancer-associated-autoantibodies-in-patients-with-gastric-cancer-and-progressive-grades-of-premalignant-lesions
#3
Irēna Meistere, Simone Werner, Pawel Zayakin, Karīna Siliņa, Undīne Rulle, Angelina Pismennaja, Daiga Šantare, Ilze Kikuste, Sergejs Isajevs, Marcis Leja, Limas Kupčinskas, Juozas Kupčinskas, Laimas Jonaitis, Chun-Ying Wu, Hermann Brenner, Aija Linē, Zane Kalniņa
BACKGROUND: Serum autoantibodies against tumor-associated antigens (TAA) are detectable in early stage gastric cancer patients; however, the time point during cancerogenesis when they appear in circulation is still obscure. METHODS: In this study, we developed a recombinant antigen microarray and analyzed the prevalence of autoantibodies against 102 TAAs in 829 gastric cancer patients and 929 healthy controls from Caucasian and Asian populations, as well as 100 patients with chronic atrophic gastritis and 775 individuals staged according to different grades of intestinal metaplasia...
August 2, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28731146/aberrant-expression-of-rsk4-in-breast-cancer-and-its-role-in-the-regulation-of-tumorigenicity
#4
Yi Jiang, Xinqing Ye, Yinan Ji, Xiao Zhou, Huawei Yang, Wei Wei, Qiuyun Li
Breast cancer is the most frequently diagnosed cancer in both more and less economically developed countries and remains the leading cause of cancer-related death in women worldwide. In this study, to explore the expression and pathological role of RSK4 in breast cancer progression, we demonstrated that RSK4 expression was significantly decreased in breast cancer cells and tissues, and the overexpression of RSK4 in MDA‑MB‑231 cells inhibited cell migration and invasion. In a mouse model experiment, overexpression of RSK4 in mice further confirmed its critical role in regulating breast cancer tumorigenicity...
July 17, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28727129/potentialization-of-n-a-tosyl-l-phenylalanine-chloromethyl-ketone-tpck-cytotoxic-activity-by-2-1-adamantylamino-6-methylpyridine-adamp-in-human-ovarian-cancer-cells
#5
Jacek Sieńko, Witold Lasek, Justyna Teliga-Czajkowska, Roman Smolarczyk, Krzysztof Czajkowski
OBJECTIVES: TNF is one of the key cytokines involved in cancer development. TNF signaling can result in both stimulating and inhibitory signals that can result in opposite biological effects in cancerogenesis. 2-(1-adamantylamino)-6-methylpyridine (AdAMP) enhances TNF secretion whereas N-a-tosyl-L-phenylalanine chloromethyl ketone (TPCK) is a NF-κB inhibitor potentially stimulating proapoptotic TNF signals. The aim of the study was to assess the effect of TPCK in combination with AdAMP on human ovarian cells...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28715499/helicobacter-pylori-modulates-host-cell-responses-by-cagt4ss-dependent-translocation-of-an-intermediate-metabolite-of-lps-inner-core-heptose-biosynthesis
#6
Saskia C Stein, Eugenia Faber, Simon H Bats, Tatiana Murillo, Yvonne Speidel, Nina Coombs, Christine Josenhans
Highly virulent Helicobacter pylori cause proinflammatory signaling inducing the transcriptional activation and secretion of cytokines such as IL-8 in epithelial cells. Responsible in part for this signaling is the cag pathogenicity island (cagPAI) that codetermines the risk for pathological sequelae of an H. pylori infection such as gastric cancer. The Cag type IV secretion system (CagT4SS), encoded on the cagPAI, can translocate various molecules into cells, the effector protein CagA, peptidoglycan metabolites and DNA...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28639131/mirna-signature-of-hepatocellular-carcinoma-vascularization-how-the-controls-can-influence-the-signature
#7
Silvia Fittipaldi, Francesco Vasuri, Sonia Bonora, Alessio Degiovanni, Giacomo Santandrea, Alessandro Cucchetti, Laura Gramantieri, Luigi Bolondi, Antonia D'Errico
BACKGROUND: miRNA deregulation and vascular modifications constitute promising predictors in the study of hepatocellular carcinoma (HCC). In the literature, the relative miRNA abundance in HCC is usually determined using as control non-matched tumoral tissue, healthy liver, or cirrhotic liver. However, a common standard RNA control for the normalization toward the tissue gene expression was not settled yet. AIM: To assess the differences existing in the quantitative miRNA gene expression in HCC on tissue according to two different liver controls...
June 21, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28630591/notch-signalinio-kelio-ir-ginekologini%C3%A5-piktybini%C3%A5-navik%C3%A5-s%C3%A4-saja
#8
Nadežda Lachej, Daiva Dabkevičienė, Aušra Sasnauskienė, Rūta Marija Trimonytė, Daiva Kanopienė, Birutė Kazbarienė, Janina Didžiapetrienė
Background. The body's cell behaviour is controlled by various signalling pathways, one of which is NOTCH. It has been found that a partial loss of the NOTCH function or abnormal strengthening of NOTCH signalling are related to various human diseases and developmental disorders. Materials and methods. PubMed was the main source of information for this paper. Results. The paper overviews the association between oncologic diseases and the participants of the NOTCH signalling pathway. In cancerogenesis, the NOTCH signalling pathway can act as a tumour suppressor or an oncogene...
2017: Acta medica Lituanica
https://www.readbyqxmd.com/read/28616749/mir-183-and-mir-21-expression-as-biomarkers-of-progression-and-survival-in-tongue-carcinoma-patients
#9
Gordana Supic, Katarina Zeljic, Aleksandra Divac Rankov, Ruzica Kozomara, Aleksandra Nikolic, Dragica Radojkovic, Zvonko Magic
OBJECTIVES: Micro RNAs (miRNAs) have a major role in human cancerogenesis.The current study investigated the prognostic significance of miR-183 and miR-21 expression in tongue carcinoma patients. MATERIAL AND METHOD: For qPCR of miR-183 and miR-21 expression, total RNA isolated from 60 fresh-frozen tissue of tongue carcinomas was converted into cDNA by TaqMan MicroRNA Reverse Transcription Kit and quantified by TaqMan MicroRNAs Expression Assays. Fold changes in the miRNAs expression, normalized to RNU6B, were determined using 2(-ΔΔCt) method, and dichotomized into high and low according to cut-off values derived from ROC curve analysis...
June 14, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28612612/-molecular-aspects-of-thyroid-tumors-with-emphasis-on-microrna-and-their-clinical-implications
#10
REVIEW
M Ludvíková, I Kholová, D Kalfeřt
BACKGROUND: Central to neoplastic transformation and tumor progression is alteration of the signaling pathways that control cell proliferation and apoptosis. The key mechanisms for this neoplastic process are genetic changes (mutations of cancer-related genes) and recently identified epigenetic changes that involve DNA methylation, chromatin remodeling (which has a profound effect on the control of gene expression), and noncoding, regulatory RNA (notably, microRNA - miRNA). MiRNAs control expression of their target gene post-transcriptionally...
December 0: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28604784/potential-therapeutic-impact-of-cd13-expression-in-non-small-cell-lung-cancer
#11
Lars Henning Schmidt, Caroline Brand, Janine Stucke-Ring, Christoph Schliemann, Torsten Kessler, Saliha Harrach, Michael Mohr, Dennis Görlich, Alessandro Marra, Ludger Hillejan, Carsten Müller-Tidow, Georg Lenz, Eva Wardelmann, Rainer Wiewrodt, Wolfgang E Berdel, Christian Schwöppe, Wolfgang Hartmann
BACKGROUND: Aminopeptidase N (CD13) is a zinc-binding protease that has functional effects on both cancerogenesis and tumor angiogenesis. Since CD13 is an antigen suitable for molecular targeted therapies (e.g. tTF-NGR induced tumor vascular infarction), we evaluated its impact in NSCLC patients, and tested the effects of the CD13-targeted fusion protein tTF-NGR (truncated tissue factor (tTF) containing the NGR motif: asparagine-glycine-arginine) in vivo in nude mice. METHODS: Expression of both CD13 and CD31 was studied in 270 NSCLC patients by immunohistochemistry...
2017: PloS One
https://www.readbyqxmd.com/read/28599991/clinical-perspective-on-diagnostic-x-ray-examinations-of-pregnant-patients-what-to-take-into-account
#12
REVIEW
Peter Vock
Imaging during pregnancy has increased in frequency. Radiation protection is extremely important although tissue reactions of the conceptus, requiring a threshold dose of around 100mGy, are unlikely in the diagnostic use of X-rays and stochastic effects of cancerogenesis have a rather low risk (around 10(-4)/mGy for childhood cancer due to in utero exposure). This article will review the risk depending on dose and phase of pregnancy and the exposure by frequent examinations; it will then concentrate on the duties of an imaging department: screening for pregnancy, examination justification, planning and optimization, patient information, counseling, involving the patient in the decisions, and managing the situation of pregnant staff members...
June 6, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28552560/2102ep-embryonal-carcinoma-cells-have-compromised-respiration-and-shifted-bioenergetic-profile-distinct-from-h9-human-embryonic-stem-cells
#13
Lyudmila Ounpuu, Aleksandr Klepinin, Martin Pook, Indrek Teino, Nadezda Peet, Kalju Paju, Kersti Tepp, Vladimir Chekulayev, Igor Shevchuk, Sulev Koks, Toivo Maimets, Tuuli Kaambre
Recent studies have shown that cellular bioenergetics may be involved in stem cell differentiation. Considering that during cancerogenesis cells acquire numerous properties of stem cells, it is possible to assume that the energy metabolism in tumorigenic cells might be differently regulated. The aim of this study was to compare the mitochondrial bioenergetic profile of normal pluripotent human embryonic stem cells (hESC) and relatively nullipotent embryonal carcinoma cells (2102Ep cell line). We examined three parameters related to cellular bioenergetics: phosphotransfer system, aerobic glycolysis, and oxygen consumption...
August 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28528692/insulin-like-growth-factor-igf-axis-in-cancerogenesis
#14
REVIEW
Aldona Kasprzak, Wojciech Kwasniewski, Agnieszka Adamek, Anna Gozdzicka-Jozefiak
Determination of the role of insulin-like growth factor (IGF) family components in carcinogenesis of several human tumors is based on numerous epidemiological and pre-clinical studies, experiments in vivo and in vitro and on attempts at application of drugs affecting the IGF axis. Investigative hypotheses in original studies were based on biological functions manifested by the entire family of IGF (ligands, receptors, linking proteins, adaptor molecules). In the context of carcinogenesis the most important functions of IGF family involve intensification of proliferation and inhibition of cell apoptosis and effect on cell transformation through synthesis of several regulatory proteins...
April 2017: Mutat Res Rev Mutat Res
https://www.readbyqxmd.com/read/28504958/prognostic-value-of-dna-repair-genes-based-on-stratification-of-glioblastomas
#15
Sun Kun, Qiwen Duan, Gang Liu, Jing-Min Lu
Abnormal expression of DNA repair genes is frequently associated with cancerogenesis of many tumors, however, the role DNA repair genes play in the progression of glioblastoma remains unclear. In this study, taking advantage of large scale of RNA-seq data, as well as clinical data, the function and prognosis value of key DNA repair genes in glioblastoma were analyzed by systematically bioinformatic approaches. Clustering was performed to screen potentially abnormal DNA repair genes related to the prognosis of glioblastoma, followed by unsupervised clustering to identify molecular subtypes of glioblastomas...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28483679/sensitive-and-non-invasive-assessment-of-hepatocellular-iron-using-a-novel-room-temperature-susceptometer
#16
Johannes Mueller, Hanna Raisi, Vanessa Rausch, Teresa Peccerella, David Simons, Christian Herbert Ziener, Heinz-Peter Schlemmer, Helmut Karl Seitz, Nina Waldburger, Thomas Longerich, Beate Katharina Straub, Sebastian Mueller
BACKGROUND & AIMS: Liver iron accumulates in various chronic liver diseases where it is an independent factor for survival and carcinogenesis. We tested a novel room-temperature susceptometer (RTS) to non-invasively assess liver iron concentration (LIC). METHODS: Two hundred and sixty-four patients with or without signs of iron overload or liver disease were prospectively enrolled. Thirty-five patients underwent liver biopsy with semiquantitative iron determination (Prussian Blue staining), atomic absorption spectroscopy (AAS, n=33), or magnetic resonance imaging (MRI, n=15)...
September 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28470968/fluorescent-diagnostics-of-epithelial-neoplasms-of-different-colon-parts
#17
Yulia S Korneva, Alexander E Dorosevich, Valeriya S Maryakhina
OBJECTIVE: Changes in the biochemical composition of the tissue during colon cancer progression usually precede morphological changes registered by light microscopy. These changes are very sensitive and may be used for diagnostics in difficult cases, when it is impossible to obtain sufficient amount of material during colonoscopy. The aim of the study is analysis of spectral characteristics of sporadic adenomas and tumors in different parts of colon for improving tumors diagnostics in disputable cases...
May 4, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28443463/decreased-expression-of-hsa_circ_0001895-in-human-gastric-cancer-and-its-clinical-significances
#18
Yongfu Shao, Linbo Chen, Rongdan Lu, Xinjun Zhang, Bingxiu Xiao, Guoliang Ye, Junming Guo
Circular RNAs are a special class of endogenous RNAs characterized by jointing 3' and 5' ends together via exon or intron circularization. Recent studies found that circular RNAs are involved in the development of some human diseases. However, little is known about their roles in human gastric cancer. In this study, we chose hsa_circ_0001895 as a targeted circRNA to investigate its clinical significances in gastric cancer patients. Hsa_circ_0001895 expression levels in five gastric cancer cell lines and 257 specimens of tissues were measured by real-time quantitative reverse transcription polymerase chain reaction...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28398662/rhesus-ce-expression-on-patient-red-blood-cells-is-an-independent-prognostic-factor-for-adenocarcinoma-of-the-lung
#19
A B Schulze, L H Schmidt, L Baie, B Heitkötter, A Kümmel, M Mohr, R Buhl, H Hillmann, G Geißler, R Kelsch, D Görlich, W E Berdel, W Hartmann, R Wiewrodt
OBJECTIVES: The influence of blood group antigens on cancerogenesis is shown for distinct tumor types, yet the impact of Rhesus blood group antigens in lung cancer is not clarified. MATERIALS AND METHODS: To investigate the impact of Rhesus blood groups a non-small cell lung cancer (NSCLC) collective (n=1,047) was analyzed retrospectively. Using a second cohort of n=340 primarily operated stage I-III NSCLC patients, we evaluated immunohistochemistry of CD47-antibody stained tissue samples in correlation to histopathologic subtype and Rhesus blood group...
April 11, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28387492/-skin-carcinogenesis-in-renal-transplant-recipients
#20
REVIEW
G E Piérard, C Piérard-Franchimont, P Delvenne
Organ transplants are bound to the induction and upkeep of immunosuppression. The immunomodulatory regimen modalities have changed over time with an improvement of the overage graft survival. The effects are also present on the skin and its cancerogenesis which is particularly activated for the squamous cell carcinoma. A review of the recent medical literature reveals the importance of searching squamous cell carcinomas, actinic keratoses, seborrheic keratoses and keratocanthomas before and after organ transplants...
March 2017: Revue Médicale de Liège
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