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https://www.readbyqxmd.com/read/28726047/dietary-acrylamide-exposure-was-associated-with-increased-cancer-mortality-in-chinese-elderly-men-and-women-a-11-year-prospective-study-of-mr-and-ms-os-hong-kong
#1
Zhao-Min Liu, Lap Ah Tse, Suzanne C Ho, Suyang Wu, Bailing Chen, Dicken Chan, Samuel Yeung-Shan Wong
AIM: Our study aims to investigate the association between dietary acrylamide exposure and cancer mortality among Chinese elderly. METHODS: A prospective cohort of 4000 elderly men and women aged 65 years and above (Mr. and Ms. OS Hong Kong study) was recruited from local communities from 2001 to 2003. Dietary exposure to acrylamide was evaluated at baseline based on a validated food frequency questionnaire and an acrylamide database from the 1st Hong Kong Total Diet Study...
July 19, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28720752/a-quasi-direct-lc-ms-ms-based-targeted-proteomics-approach-for-mirna-quantification-via-a-covalently-immobilized-dna-peptide-probe
#2
Liang Liu, Qingqing Xu, Shuai Hao, Yun Chen
MicroRNAs (miRNAs) play a vital role in regulating gene expression and are associated with a variety of cancers, including breast cancer. Their distorted and unique expression is a potential marker in clinical diagnoses and prognoses. Thus, accurate determination of miRNA expression levels is a prerequisite for their applications. However, the assays currently available for miRNA detection typically require pre-enrichment, amplification and labeling steps, and most of the assays are only semi-quantitative. Therefore, we developed a quasi-direct liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based targeted proteomics approach to quantify target miRNA by innovatively converting the miRNA signal into the mass response of a reporter peptide via a covalently immobilized DNA-peptide probe...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720677/synthetic-circulating-cell-free-dna-as-quality-control-materials-for-somatic-mutation-detection-in-liquid-biopsy-for-cancer
#3
Rui Zhang, Rongxue Peng, Ziyang Li, Peng Gao, Shiyu Jia, Xin Yang, Jiansheng Ding, Yanxi Han, Jiehong Xie, Jinming Li
BACKGROUND: Detection of somatic genomic alterations in tumor-derived cell-free DNA (cfDNA) in the plasma is challenging owing to the low concentrations of cfDNA, variable detection methods, and complex workflows. Moreover, no proper quality control materials are available currently. METHODS: We developed a set of synthetic cfDNA quality control materials (SCQCMs) containing spike-in cfDNA on the basis of micrococcal nuclease digestion carrying somatic mutations as simulated cfDNA and matched genomic DNA as genetic background to emulate paired tumor-normal samples in real clinical tests...
July 18, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28712551/facile-synthesis-of-thiol-polyethylene-glycol-functionalized-magnetic-titania-nanomaterials-for-highly-efficient-enrichment-of-n-linked-glycopeptides
#4
Jiawen Wang, Jizong Yao, Nianrong Sun, Chunhui Deng
As protein N-glycosylation involved in generation and development of various cancers and diseases, it is vital to capture glycopeptides from complex biological samples for biomarker discovery. In this work, by taking advantages of the interaction between titania and thiol groups, thiol-polyethylene glycol functionalized magnetic titania nanomaterials (denoted as Fe3O4@TiO2@PEG) were firstly fabricated as an excellent hydrophilic adsorbent of N-linked glycopeptides. On one hand, the special interaction of titanium-thiol makes the synthetic manipulation simple and provides a new idea for design and synthesis of novel nanomaterials; on the other hand, strong magnetic response could realize rapid separation and the outstanding hydrophilicity of polyethylene glycol makes Fe3O4@TiO2@PEG nanomaterials show superior performance for glycopeptides enrichment with ultralow limit of detection (0...
July 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28705771/different-frequencies-of-porphyromonas-gingivalis-infection-in-cancers-of-the-upper-digestive-tract
#5
Xiang Yuan, Yiwen Liu, Jinyu Kong, Bianli Gu, Yijun Qi, Xinshuai Wang, Man Sun, Pan Chen, Wei Sun, Huizhi Wang, Fuyou Zhou, Shegan Gao
The high incidence rate of multiple carcinomas in the upper digestive tract is often explained in terms of involvement of the same underlying risk factors. It has been reported that the oral bacterium Streptococcus anginosus is associated with esophageal, gastric, and pharyngeal cancers. We previously reported occurrence of Porphyromonas gingivalis (P. gingivalis) DNA in esophagus cancer. In this study, the presence of P. gingivalis in specimens of various types of cancer from the upper digestive tract was investigated...
July 11, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28705205/clinicopathological-features-and-prognosis-of-gastroenteropancreatic-neuroendocrine-neoplasms-in-a-chinese-population-a-large-retrospective-single-centre-study
#6
Meng Zhang, Ping Zhao, Xiaodan Shi, Ahong Zhao, Lianfeng Zhang, Lin Zhou
BACKGROUND: Gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) are the most common type of neuroendocrine tumors, accounting for more than half of neuroendocrine neoplasms (NENs). We performed a retrospective study in our center to investigate the clinicopathological features, risk factors of metastasis, and prognosis of GEP-NENs in a Chinese population. METHODS: Four hundred forty patients with GEP-NENs treated at the First Affiliated Hospital of Zhengzhou University between January 2011 and March 2016 were analyzed retrospectively...
July 13, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28693038/coffee-drinking-and-mortality-in-10-european-countries-a-multinational-cohort-study
#7
Marc J Gunter, Neil Murphy, Amanda J Cross, Laure Dossus, Laureen Dartois, Guy Fagherazzi, Rudolf Kaaks, Tilman Kühn, Heiner Boeing, Krasimira Aleksandrova, Anne Tjønneland, Anja Olsen, Kim Overvad, Sofus Christian Larsen, Maria Luisa Redondo Cornejo, Antonio Agudo, María José Sánchez Pérez, Jone M Altzibar, Carmen Navarro, Eva Ardanaz, Kay-Tee Khaw, Adam Butterworth, Kathryn E Bradbury, Antonia Trichopoulou, Pagona Lagiou, Dimitrios Trichopoulos, Domenico Palli, Sara Grioni, Paolo Vineis, Salvatore Panico, Rosario Tumino, Bas Bueno-de-Mesquita, Peter Siersema, Max Leenders, Joline W J Beulens, Cuno U Uiterwaal, Peter Wallström, Lena Maria Nilsson, Rikard Landberg, Elisabete Weiderpass, Guri Skeie, Tonje Braaten, Paul Brennan, Idlir Licaj, David C Muller, Rashmi Sinha, Nick Wareham, Elio Riboli
Background: The relationship between coffee consumption and mortality in diverse European populations with variable coffee preparation methods is unclear. Objective: To examine whether coffee consumption is associated with all-cause and cause-specific mortality. Design: Prospective cohort study. Setting: 10 European countries. Participants: 521 330 persons enrolled in EPIC (European Prospective Investigation into Cancer and Nutrition)...
July 11, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28692695/cancer-in-korean-patients-with-end-stage-renal-disease-a-7-year-follow-up
#8
Kyung Don Yoo, Jung Pyo Lee, Su Mi Lee, Jae Yoon Park, Hajeong Lee, Dong Ki Kim, Shin-Wook Kang, Chul Woo Yang, Yong-Lim Kim, Chun Soo Lim, Kwon Wook Joo, Yon Su Kim
BACKGROUND: The effectiveness of dialysis on the incidence of cancer in patients with end-stage renal disease (ESRD) remains to be clarified. In this study, we evaluated the incidence rate and type of cancer among patients with ESRD, compared to the general population, through a prospective 7-year follow-up. We also calculated the cumulative incidence rate of cancer associated with ESRD, with stratification to control for the competing risk of death. METHODS: This prospective observational cohort study was conducted using data from a nationwide study on patients with ESRD in Korea...
2017: PloS One
https://www.readbyqxmd.com/read/28692406/mortality-from-circulatory-diseases-and-other-non-cancer-outcomes-among-nuclear-workers-in-france-the-united-kingdom-and-the-united-states-inworks
#9
Michael Gillies, David B Richardson, Elisabeth Cardis, Robert D Daniels, Jacqueline A O'Hagan, Richard Haylock, Dominique Laurier, Klervi Leuraud, Monika Moissonnier, Mary K Schubauer-Berigan, Isabelle Thierry-Chef, Ausrele Kesminiene
Positive associations between external radiation dose and non-cancer mortality have been made in a number of published studies, primarily of populations exposed to high-dose, high-dose-rate ionizing radiation. The goal of this study was to determine whether external radiation dose was associated with non-cancer mortality in a large pooled cohort of nuclear workers exposed to low-dose radiation accumulated at low dose rates. The cohort comprised 308,297 workers from France, United Kingdom and United States. The average cumulative equivalent dose at a tissue depth of 10 mm [Hp(10)] was 25...
July 10, 2017: Radiation Research
https://www.readbyqxmd.com/read/28692048/increased-expression-of-programmed-cell-death-protein-1-on-nk-cells-inhibits-nk-cell-mediated-anti-tumor-function-and-indicates-poor-prognosis-in-digestive-cancers
#10
Y Liu, Y Cheng, Y Xu, Z Wang, X Du, C Li, J Peng, L Gao, X Liang, C Ma
Abnormal expression of activating/inhibitory receptors leads to natural killer (NK) cells dysfunction in tumor. Here we show that programmed cell death protein 1 (PD-1), a well-known immune checkpoint of T cells, is highly expressed on peripheral and tumor-infiltrating NK cells from patients with digestive cancers including esophageal, liver, colorectal, gastric and biliary cancer. The increased PD-1 expression on NK cells indicates poorer survival in esophageal and liver cancers. Blocking PD-1/PD-L1 signaling markedly enhances cytokines production and degranulation and suppresses apoptosis of NK cells in vitro...
July 10, 2017: Oncogene
https://www.readbyqxmd.com/read/28684274/construction-of-high-level-prokaryotic-expression-and-purification-system-of-pd-l1-extracellular-domain-by-using-escherichia-coli-host-cell-machinery
#11
Muhammad Kalim, Jie Chen, Shenghao Wang, Caiyao Lin, Saif Ullah, Keying Liang, Qian Ding, Shuqing Chen, Jinbiao Zhan
Programmed cell death 1 ligand 1 (PD-L1) is a trans-membrane protein highly expressed on the membrane of cancer cell, which binds inhibitory receptor of PD-1 on the T cells and attenuates anti-tumor immune response.The strategy of blocking PD1 and PD-L1 interaction has been widely used for anti-cancer drug development. The DNA encoding extracellular domain of PD-L1wascloned and expressed with the pET30(+) and Escherichia coli BL21(DE3) system. Cloning of PD-L1 extracellular domain was confirmed by PCR and enzymatic digestion...
July 3, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28682227/-gut-microbiota-and-efficacy-of-cancer-therapies
#12
Marie Vétizou, Romain Daillère, Laurence Zitvogel
The gut microbiota is known to affect digestion, protection against pathogens infection, immune system maturation and enteric nervous system development, but others links have also been established with diabetes, obesity, autism and cancer. Lately, bacterial species from the gut have been involved in tumor immunosurveillance. Natural or mediated by treatment such as chemotherapy or immunotherapy, anti-tumoral immune responses seem to rely on gut microbiota. The bacteria involved and their mechanisms of action are different according to the treatment of interest...
2017: Biologie Aujourd'hui
https://www.readbyqxmd.com/read/28682224/-challenges-set-by-the-microbiota
#13
Patrice Debré
The microbiota designates the various flora of commensal microbes of living species. Most research in human focusing mainly on the intestinal microbiota, we will limit ourselves to its description and role in physiology and pathology. The intestinal microbiota acts on digestion and the immune system. It seems responsible, at least in part, for obesity, digestive cancers, several autoimmune and allergic pathologies, and pathologies of the nervous system. The role of prebiotics, probiotics, xenobiotics and stool transplantations will be discussed...
2017: Biologie Aujourd'hui
https://www.readbyqxmd.com/read/28680368/choice-of-relative-or-cause-specific-approach-to-cancer-survival-analysis-impacts-estimates-differentially-by-cancer-type-population-and-application-evidence-from-a-canadian-population-based-cohort-study
#14
Diana R Withrow, Jason D Pole, E Diane Nishri, Michael Tjepkema, Loraine D Marrett
BACKGROUND: Cause-specific (CS) and net survival in a relative survival framework (RS) are two of the most common methods for estimating cancer survival. In this paper, we assess the differences in results produced by two permutations of cause-specific and relative survival applied to estimating cancer survival and disparities in cancer survival, using data from First Nations and non-Aboriginal populations in Canada. METHODS: Subjects were members of the 1991 Canadian Census Mortality Cohort, a population-based cohort of adult respondents to the 1991 Long Form Census who have been followed up for incident cancers and death through linkage to administrative databases...
2017: Population Health Metrics
https://www.readbyqxmd.com/read/28679646/multiplexed-elimination-of-wild-type-dna-and-high-resolution-melting-prior-to-targeted-resequencing-of-liquid-biopsies
#15
Ioannis Ladas, Mariana Fitarelli-Kiehl, Chen Song, Viktor A Adalsteinsson, Heather A Parsons, Nancy U Lin, Nikhil Wagle, G Mike Makrigiorgos
BACKGROUND: The use of clinical samples and circulating cell-free DNA (cfDNA) collected from liquid biopsies for diagnostic and prognostic applications in cancer is burgeoning, and improved methods that reduce the influence of excess wild-type (WT) portion of the sample are desirable. Here we present enrichment of mutation-containing sequences using enzymatic degradation of WT DNA. Mutation enrichment is combined with high-resolution melting (HRM) performed in multiplexed closed-tube reactions as a rapid, cost-effective screening tool before targeted resequencing...
July 5, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28678506/a-comprehensive-map-and-functional-annotation-of-human-pituitary-and-thyroid-proteome
#16
Xiaoyan Liu, Zhengguang Guo, Haidan Sun, Wenting Li, Wei Sun
Knowledge about human tissue proteome will provide insights into health organ physiology. To construct a comprehensive dataset of human pituitary and thyroid proteins, post-mortem pituitaries and thyroids from 10 normal individuals were used. The pooled samples were prepared using two methods, one part of sample was processed using 14 high-abundance proteins immunoaffinity column. The other part was directly subjected to digestion. Finally, a total of 7596 proteins in pituitary and 5602 proteins in thyroid with high confidence were identified, with 6623 and 4368 quantified respectively...
July 5, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28678446/mda-mb-231-and-8701bc-breast-cancer-lines-promote-the-migration-and-invasiveness-of-ecv304-cells-on-2d-and-3d-type-i-collagen-matrix
#17
S Saladino, M Salamone, G Ghersi
Tumor angiogenesis is a multiphasic process, having the extracellular matrix remodeling as critical step. Different classes of proteolytic enzymes in matrix digestion/remodeling are involved. The role of lytic enzymes and their activation mode have not been completely elucidated. Herein, the crosstalk between endothelia and tumor cells, by realization of bi- and three-dimensional endothelial and breast cancer cells co-cultures, were studied in vitro. Particularly, the effects of two tumor conditioned media (TCM) were assessed about endothelial proliferation, migration and invasiveness...
July 5, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28675934/characterization-of-the-extracellular-matrix-of-normal-and-diseased-tissues-using-proteomics
#18
Alexandra Naba, Oliver Mt Pearce, Amanda Del Rosario, Duanduan Ma, Huiming Ding, Vinothini Rajeeve, Pedro R Cutillas, Frances R Balkwill, Richard O Hynes
The extracellular matrix (ECM) is a complex meshwork of insoluble fibrillar proteins and signaling factors interacting together to provide architectural and instructional cues to the surrounding cells. Alterations in ECM organization or composition and excessive ECM deposition have been observed in diseases such as fibrosis, cardio-vascular diseases, and cancer. We provide here optimized protocols to solubilize ECM proteins from normal or tumor tissues, digest the proteins into peptides, analyze ECM peptides by mass spectrometry, and interpret the mass spectrometric data...
July 4, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28674879/in-depth-reproducible-analysis-of-human-plasma-using-igy-14-and-supermix-immunodepletion
#19
Lynn A Beer, Bonnie Ky, Kurt T Barnhart, David W Speicher
Identification of cancer and other disease biomarkers in human plasma has been exceptionally challenging due to the complex nature of plasma and the presence of a moderate number of high- and medium-abundance proteins which mask low-abundance proteins of interest. As a result, immunoaffinity depletion formats combining multiple antibodies to target the most abundant plasma proteins have become the first stage in most plasma proteome discovery schemes. This protocol describes the use of tandem IgY 14 and SuperMix immunoaffinity depletion to reproducibly remove >99% of total plasma protein...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28673318/choice-of-relative-or-cause-specific-approach-to-cancer-survival-analysis-impacts-estimates-differentially-by-cancer-type-population-and-application-evidence-from-a-canadian-population-based-cohort-study
#20
Diana R Withrow, Jason D Pole, E Diane Nishri, Michael Tjepkema, Loraine D Marrett
BACKGROUND: Cause-specific (CS) and net survival in a relative survival framework (RS) are two of the most common methods for estimating cancer survival. In this paper, we assess the differences in results produced by two permutations of cause-specific and relative survival applied to estimating cancer survival and disparities in cancer survival, using data from First Nations and non-Aboriginal populations in Canada. METHODS: Subjects were members of the 1991 Canadian Census Mortality Cohort, a population-based cohort of adult respondents to the 1991 Long Form Census who have been followed up for incident cancers and death through linkage to administrative databases...
July 3, 2017: Population Health Metrics
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