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Plasma dna

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https://www.readbyqxmd.com/read/29679564/frequencies-and-expression-levels-of-programmed-death-ligand-1-pd-l1-in-circulating-tumor-rna-ctrna-in-various-cancer-types
#1
Toshiyuki Ishiba, Andreas-Claudius Hoffmann, Joshua Usher, Yahya Elshimali, Todd Sturdevant, Mai Dang, Yolanda Jaimes, Rama Tyagi, Ronald Gonzalez, Mary Grino, Jacek K Pinski, Afsaneh Barzi, Luis E Raez, Wilfried E Eberhardt, Dirk Theegarten, Heinz-Josef Lenz, Hiroyuki Uetake, Peter V Danenberg, Kathleen Danenberg
BACKGROUND: Precision medicine and prediction of therapeutic response requires monitoring potential biomarkers before and after treatment. Liquid biopsies provide noninvasive prognostic markers such as circulating tumor DNA and RNA. Circulating tumor RNA (ctRNA) in blood is also used to identify mutations in genes of interest, but additionally, provides information about relative expression levels of important genes. In this study, we analyzed PD-L1 expression in ctRNA isolated from various cancer types...
April 18, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29679277/the-role-of-mitochondrial-dna-damage-at-skeletal-muscle-oxidative-stress-on-the-development-of-type-2-diabetes
#2
Julia Matzenbacher Dos Santos, Denise Silva de Oliveira, Marcos Lazaro Moreli, Sandra Aparecida Benite-Ribeiro
Reduced cellular response to insulin in skeletal muscle is one of the major components of the development of type 2 diabetes (T2D). Mitochondrial dysfunction involves in the accumulation of toxic reactive oxygen species (ROS) that leads to insulin resistance. The aim of this study was to verify the involvement of mitochondrial DNA damage at ROS generation in skeletal muscle during development of T2D. Wistar rats were fed a diet containing 60% fat over 8 weeks and at day 14 a single injection of STZ (25 mg/kg) was administered (T2D-induced)...
April 20, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29678144/interferon-alpha-as-antiviral-therapy-in-chronic-active-epstein-barr-virus-disease-with-interstitial-pneumonia-case-report
#3
Jacek Roliński, Ewelina Grywalska, Aleksandra Pyzik, Michał Dzik, Violetta Opoka-Winiarska, Agata Surdacka, Maciej Maj, Franciszek Burdan, Michał Pirożyński, Piotr Grabarczyk, Elżbieta Starosławska
BACKGROUND: Chronic active Epstein-Barr virus (EBV) disease (CAEBV) is defined as a severe, progressive lymphoproliferative disorder associated with active EBV infection persisting longer than 6 months and developing in patients without recognised immunodeficiency. Rarely, interstitial pneumonitis (IP) occurs as a serious complication in CAEBV patients. The standard therapeutic regimen for IP in CAEBV has not yet been defined. Although interferon alpha (IFN-alpha) is known to suppress viral DNA replication by affecting its basal promoter activation process, it is rarely used in CAEBV patients...
April 20, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29677836/convenient-colorimetric-detection-of-thrombin-via-aptamer-mediated-inhibition-and-restoration-of-the-oxidase-activity-of-nanoceria
#4
Han Pill Song, Ji Yeon Jang, So Hyeon Bae, Seong Bong Choi, Byung Jo Yu, Moon Il Kim
Cerium oxide nanoparticles, also called nanoceria, have recently gained much attention as oxidase-mimicking nanozymes that catalyze the oxidation of chromogenic substrates for color generation without the addition of H2O2. Herein, we have developed a unique colorimetric biosensor for thrombin in human blood plasma, which relies on thrombin-binding aptamer (TBA)-mediated inhibition of the oxidase activity of nanoceria and its restoration by very selective interactions of TBA with target thrombin. In this system, nanoceria were first incubated with TBA, resulting in quick reduction of the oxidase activity of nanoceria via the adsorption of single-stranded (ss)DNA-type TBA on nanoceria...
September 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29676606/awareness-of-mutational-artefacts-in-suboptimal-dna-samples-possible-risk-for-therapeutic-choices
#5
Sara Mariani, Luca Bertero, Vittoria Coppola, Giorgio Saracco, Alberto Arezzo, Paola Francia di Celle, Jasna Metovic, Caterina Marchiò, Paola Cassoni
BACKGROUND: Technical biases due to PCR artefacts could represent an insidious obstacle for mutational analysis and precision medicine. METHODS: The authors report a retrospective analysis by fast COLD-PCR and sequencing of 31 suboptimal tumor DNA samples obtained from FFPE tissues and liquid biopsies. RESULTS: In FFPE tumor tissues and plasma liquid biopsies of patients with lung and colorectal adenocarcinoma, we observed a significant rate of artefactual KRAS mutations, unveiled by repeated analysis following UDG pretreatment as well as by simple repetition without UDG pretreatment step, thus suggesting a DNA damage different from cytosine deamination...
April 20, 2018: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/29675493/association-between-seminal-plasma-neopterin-and-oxidative-stress-in-male-infertility-a-case-control-study
#6
Tayebeh Ghiasvand, Mohammad Taghi Goodarzi, Gholamreza Shafiee, Alireza Zamani, Jamshid Karimi, Marzieh Ghorbani, Iraj Amiri
Background: Neopterin is a significant and sensitive marker in estimating the activity of cellular immune system. Oxidative stress plays a role in the etiology of male infertility. Increased reactive oxygen species is accompanied with increase in neopterin level. Hence neopterin may be involved in male infertility. Objective: The objective of this case-control study was to determine neopterin level in idiopathic infertile and normospermic men; furthermore, to identify its relationship with oxidative stress markers including total oxidant, malondialdehyde, sperm DNA fragmentation, and total antioxidant capacity of seminal plasma...
February 2018: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29675214/controllable-extension-of-hairpin-structured-flaps-to-allow-low-background-cascade-invasive-reaction-for-a-sensitive-dna-logic-sensor-for-mutation-detection
#7
Yun-Long Liu, Hai-Ping Wu, Qiang Zhou, Qin-Xin Song, Jian-Zhong Rui, Xiao-Xiang Guan, Guo-Hua Zhou, Bing-Jie Zou
A DNA logic sensor was constructed for gene mutation analysis based on a novel signal amplification cascade by controllably extending a hairpin-structured flap to bridge two invasive reactions. The detection limit was as low as 0.07 fM, and the analytical specificity is high enough to unambiguously pick up 0.02% mutants from a large amount of wild-type DNA. Gene mutations related to the personalized medicine of gefitinib, a typical tyrosine kinase inhibitor, were analyzed by the DNA logic sensor with only a 15 minute response time...
February 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29675023/increased-plasma-levels-of-danger-associated-molecular-patterns-are-associated-with-immune-suppression-and-postoperative-infections-in-patients-undergoing-cytoreductive-surgery-and-hyperthermic-intraperitoneal-chemotherapy
#8
Guus P Leijte, Hettie Custers, Jelle Gerretsen, Amon Heijne, Johannes Roth, Thomas Vogl, Gert J Scheffer, Peter Pickkers, Matthijs Kox
Introduction: Danger-associated molecular patterns (DAMPs) can elicit immune responses and may subsequently induce an immune-suppressed state. Previous work showed that increased plasma levels of DAMPs are associated with immune suppression and increased susceptibility toward infections in trauma patients. Like trauma, major surgical procedures, such as cytoreductive surgery (CRS) combined with hyperthermic intraperitoneal chemotherapy (HIPEC), are also thought to cause profound DAMP release...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29674279/association-of-melatonin-mtnr1b-variants-with-type-2-diabetes-in-gujarat-population
#9
Roma Patel, Nirali Rathwa, Sayantani Pramanik Palit, A V Ramachandran, Rasheedunnisa Begum
AIM/HYPOTHESIS: Melatonin is a circadian rhythm regulator and any imbalance in its levels can be related to various metabolic disorders. Melatonin and the genetic variants of Melatonin Receptor 1B (MTNR1B) are reported to be associated with Type 2 Diabetes (T2D) susceptibility. The aim of the present study was to investigate i) plasma melatonin levels ii) Single Nucleotide Polymorphisms (SNPs) of MTNR1B and iii) Genotype-phenotype correlation analysis in T2D patients. METHODS: Plasma and PBMCs were separated from venous blood of 478 diabetes patients and 502 controls...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29673813/serum-concentrations-of-folate-vitamers-in-patients-with-a-newly-diagnosed-prostate-cancer-or-hyperplasia
#10
Hussain Mohamad Awwad, Carsten-Henning Ohlmann, Michael Stoeckle, Juergen Geisel, Rima Obeid
BACKGROUND: Folate is required for synthesis of methyl groups and DNA in growing cells. The association between folate and prostate cancer (PCa) is not conclusive. METHODS: We investigated concentrations of folate vitamers, S-adenosylhomocysteine (SAH) and S-adenosylmethionine (SAM) in blood of men with PCa (n = 129) or benign prostatic hyperplasia (BPH) (n = 73) who were recruited just after the first diagnosis. RESULTS: In younger subjects <65 years, concentrations of (6S)-5-CH3 -H4 folate (15...
April 16, 2018: Clinical Biochemistry
https://www.readbyqxmd.com/read/29669755/zinc-finger-irf-composite-elements-bound-by-ikaros-irf4-complexes-function-as-gene-repression-in-plasma-cell
#11
Kyoko Ochiai, Haruka Kondo, Yasunobu Okamura, Hiroki Shima, Yuko Kurokochi, Kazumi Kimura, Ryo Funayama, Takeshi Nagashima, Keiko Nakayama, Katsuyuki Yui, Kengo Kinoshita, Kazuhiko Igarashi
The transcription factor (TF) interferon regulatory factor-4 (IRF4) promotes both germinal center (GC) reactions and plasma cell (PC) differentiation by binding to alternative DNA motifs including AP-1-IRF composite elements, Ets-IRF composite elements (EICEs), and interferon sequence response elements (ISREs). Although all of these motifs mediate transcriptional activation by IRF4, it is still unknown how some of the IRF4 target genes are downregulated upon PC differentiation. Here, we revealed a molecular mechanism of IRF4-mediated gene downregulation during PC differentiation...
April 24, 2018: Blood Advances
https://www.readbyqxmd.com/read/29669510/analysis-of-long-non-coding-rna-lncrna-expression-in-hepatitis-b-patients
#12
Sunde Yılmaz Susluer, Cagla Kayabasi, Besra Ozmen Yelken, Aycan Asik, Didem Celik, Tugce Balci Okcanoglu, Suheyla Serin Senger, Cigir Biray Avci, Sukran Kose, Cumhur Gunduz
Long non-coding RNAs (lncRNAs) have been implicated in numerous biological processes, including epigenetic regulation, cell-cycle control, and transcriptional/translational regulation of gene expression. Differential expression of lncRNAs and disruption of the regulatory processes are recognized as critical steps in cancer development. The role of lncRNAs in hepatitis B virus (HBV) infection is not well understood. Here we analyzed the expression of 135 lncRNAs in plasma samples of 82 HBV patients (classified as chronic patients, inactive carriers, or resolved patients) at diagnosis and at 12 months of treatment in relation to control group (81 healthy volunteers)...
April 19, 2018: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29669110/chronic-occupational-exposure-endured-by-tobacco-farmers-from-brazil-and-association-with-dna-damage
#13
Vívian F Silva Kahl, Varinderpal Singh Dhillon, Daniel Simon, Fernanda Rabaioli da Silva, Mirian Salvador, Cátia Dos Santos Branco, Mónica Cappetta, Wilner Martínez-López, Flávia V Thiesen, Johnny F Dias, Claudia Telles de Souza, Michael Fenech, Juliana da Silva
Tobacco farming is an important economic income in Brazil, although it has been challenged as regard the occupational exposure to both pesticides and nicotine endured by farmers. Chronic occupational exposure to complex mixtures can lead to health hazardous. We examined genomic instability and epigenetic changes in tobacco farmers occupationally exposed to pesticide mixtures and nicotine at tobacco fields. DNA damage was assessed by alkaline comet assay in blood cells. Genomic DNA was isolated, and telomere length was measured using quantitative polymerase chain reaction assay...
April 13, 2018: Mutagenesis
https://www.readbyqxmd.com/read/29668342/sequencing-the-next-generation-of-glioblastomas
#14
Ivana Jovčevska
The most aggressive brain malignancy, glioblastoma, accounts for 60-70% of all gliomas and is uniformly fatal. According to the molecular signature, glioblastoma is divided into four subtypes (proneural, neural, classical, and mesenchymal), each with its own genetic background. The Cancer Genome Atlas project provides information about the most common genetic changes in glioblastoma. They involve mutations in TP53, TERT, and PTEN, and amplifications in EFGR, PDGFRA, CDK4, CDK6, MDM2, and MDM4. Recently, epigenetics was used to demonstrate the oncogenic roles of miR-124, miR-137, and miR-128...
April 18, 2018: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/29666348/testosterone-levels-and-the-genetic-variation-of-sex-hormone-binding-globulin-gene-of-bubalus-bubalis-bulls-in-egypt
#15
Samy Naeem, Ahmed Ghoneim, Gamal Abd-Allah, Omaima Hassan
Testosterone is themain plasma androgen produced and secreted by male testis. To be bioactive, it binds to sex hormonebinding globulin (SHBG), i.e. the major transporter protein of sex steroids in the blood of mammals and other vertebrate species.Firstly, this study aimed to determine the levels of testosterone in different-age groups of buffalo bulls (Bubalus bubalis) in Egypt, and secondly to screen the genetic polymorphisms in their SHBG gene and to investigatewhether these polymorphisms are associated with the level of the circulating serum testosterone...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29666156/circulating-bacterial-fragments-as-cardiovascular-risk-factors-in-ckd
#16
Cheuk-Chun Szeto, Christopher William McIntyre, Philip Kam-Tao Li
Cardiovascular disease (CVD) is a major cause of mortality and morbidity in patients with CKD. In the past decade, intestinal dysbiosis and altered gut epithelial barrier function are increasingly recognized in CKD. Uremic patients have slow intestinal transit time, impaired protein assimilation, and decreased consumption of dietary fiber. The use of multiple medications also may contribute to the proliferation of dysbiotic bacteria, which affect the barrier function of intestinal epithelium. In addition, fluid overload and uremic toxins per se directly reduce the gut barrier function...
April 17, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29665652/the-protective-effect-of-p7c3-against-dna-and-neuron-damage-in-rat-pups-with-congenital-hypothyroidism
#17
Halef Okan Dogan, Mehmet Eray Alcigir
Congenital hypothyroidism (CH) is defined as congenital thyroid hormone deficiency. The aim of this study was to examine the DNA and neuron damage in rat pups with CH and to evaluate the beneficial effects of 3.6-Dibromo-α-[(phenylamino) methyl]-9H-carbazole-9-ethanol (P7C3). Rat pups were assigned to four groups as Group 1: CH, Group 2: CH treated with P7C3, Group 3: CH treated with P7C3 and L-thyroxine, and Group 4: control group. Plasma 8-(OH)DG and neuron-specific enolase (NSE) concentrations were determined in all groups...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29665409/epigenomic-biomarkers-for-prognostication-and-diagnosis-of-gastrointestinal-cancers
#18
REVIEW
Chi Chun Wong, Weilin Li, Bertina Chan, Jun Yu
Altered epigenetic regulation is central to many human diseases, including cancer. Over the past two decade, major advances have been made in our understanding of the role of epigenetic alterations in carcinogenesis, particularly for DNA methylation, histone modifications and non-coding RNAs. Aberrant hypermethylation of DNA at CpG islands is a well-established phenomenon that mediates transcriptional silencing of tumor suppressor genes, and it is an early event integral to gastrointestinal cancer development...
April 14, 2018: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/29664957/killer-cell-immunoglobulin-like-receptors-associate-with-hiv-1-infection-in-a-narrow-source-han-chinese-cohort
#19
Linghang Wang, Yonghong Zhang, Keyi Xu, Tao Dong, Sarah Rowland-Jones, Louis-Marie Yindom
BACKGROUND: The HIV pandemic remains the most serious challenge to public health worldwide. The hallmark characteristics of the disease is the eventual failure of the immune system to control opportunistic infections and death. However not everyone who has HIV develops the disease at the same rate and so we are studying how the immune system works to control the virus in those who have been infected for decades and remain relatively healthy without the need of anti-retroviral therapy (ART)...
2018: PloS One
https://www.readbyqxmd.com/read/29664127/cell-free-nucleic-acids-are-present-in-blood-products-and-regulate-genes-of-innate-immune-response
#20
Sophie Waldvogel Abramowski, Diderik Tirefort, Pierre Lau, Arthur Guichebaron, Sofiane Taleb, Christine Modoux, Coralie Lemoine Chaduc, Pascale Bruyere Cerdan, Pascale Roux Lombard, Thomas Lecompte, Olivier Preynat-Seauve
BACKGROUND: Extracellular nucleic acids circulate in plasma. They are expected to be present in manufactured blood products eligible for transfusion, but little is known about their biological activity on human cells. The aim of this study is to investigate whether cell-free nucleic acids (CFNAs) are present and biologically active in red blood cell units (RBCUs), fresh frozen plasmas, and platelet concentrates. STUDY DESIGN AND METHODS: CFNAs were extracted from RBCUs, fresh frozen plasma, and platelet concentrates...
April 17, 2018: Transfusion
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