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https://www.readbyqxmd.com/read/28738589/2-aminopurine-probe-in-combination-with-catalyzed-hairpin-assembly-signal-amplification-for-simple-and-sensitive-detection-of-microrna
#1
Chan Liu, Sifang Lv, Hang Gong, Chunyan Chen, Xiaoming Chen, Changqun Cai
A quencher-free and enzyme-free fluorescent sensor was proposed to simply and sensitively detect miRNA via the target catalyzed hairpin assembly (CHA) signal amplification in combination with 2-aminopurine (2-AP) molecular beacon (MBs). This sensor contains two DNA hairpins termed as H1 and H2. H1 labeled by 2-AP needs no quenchers because 2-AP can be quenched through its stacking interaction with the adjacent bases. H2 is partially complementary to H1. In the presence of the target microRNA (miRNA), H1 is unfolded and produces the DNA/RNA complexes, enhancing the fluorescent signal...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738361/expression-intracellular-localization-and-prognostic-value-of-plasminogen-activator-inhibitor-1-and-pai-1-rna-binding-protein-1-in-primary-and-recurrent-ovarian-cancer-a-study-of-the-tumor-bank-ovarian-cancer-network
#2
Dominique Koensgen, Matthias B Stope, Ivana Tuerbachova, Daniela Bruennert, Thomas Kohlmann, Ioana Braicu, Jalid Sehouli, Carsten Denkert, Silvia Darb-Esfahani, Elmar Stickeler, Dumitru Sofroni, Edgar Dahl, Alexander Mustea
BACKGROUND: The plasminogen activator system plays a key role in ovarian cancer (OC) tumor progression. The plasminogen activator inhibitor type 1 (PAI-1) and the recently identified PAI-1 RNA binding protein 1 (PAI-RBP1) are primary regulators of plasminogen activation and thus are putative biomarkers for OC progression. METHODS: One hundred fifty six OC patients were analyzed to identify the presence of PAI-1 and PAI-RBP1 and subsequently correlated to clinicopathological parameters...
July 22, 2017: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/28737829/expression-profile-of-circular-rnas-in-human-gastric-cancer-tissues
#3
You-Sheng Huang, Na Jie, Ke-Jian Zou, Yang Weng
Circular RNAs (circRNAs) represent a newly identified class of non‑coding RNA molecules, which interfere with gene transcription by adsorbing microRNAs (miRNAs). CircRNAs serve important roles in disease development and have the potential to serve as a novel class of biomarkers for clinical diagnosis. However, the role of circRNAs in the occurrence and development of gastric cancer (GC) remains unclear. In the present study, the expression profiles of circRNAs were compared between GC and adjacent normal tissues using a circRNA microarray, following which quantitative polymerase chain reaction (qPCR) was used to confirm the results of the circRNA microarray...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28737470/recent-advances-in-circulating-tumor-cells-and-cell-free-dna-in-metastatic-prostate-cancer-a-review
#4
Sunil Parimi, Jenny J Ko
The treatment landscape of metastatic prostate cancer has changed dramatically over the past five years. As new discoveries are made and further novel therapies become available, there is a heightened urgency to develop biomarkers that can guide prognoses and predict therapy responses. Circulating tumor cells (CTCs) and cell-free circulating tumor DNA (ctDNA) in the blood have emerged as potential promising tumor avatars. Areas covered: In this review, we describe technological breakthroughs and clinical implementation of the CTCs and ctDNA...
July 24, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28736784/a-bioorthogonal-fluorescent-probe-for-mitochondrial-hydrogen-sulfide-new-strategy-for-cancer-cell-labeling
#5
Nithya Velusamy, Anupama Binoy, Kondapa Naidu Bobba, Divya Nedungadi, Nandita Mishra, Sankarprasad Bhuniya
We report the application of a chemodosimeter 'turn on' fluorescent probe for detecting endogenous H2S formation in cancer cells. Mito-HS showed a bathochromic shift in the UV-vis-absorption spectrum from 355 nm to 395 nm in the presence of H2S. Furthermore, it showed an ∼43-fold fluorescence enhancement at λem = 450 nm in the presence of H2S (200 μM). The cancer cell-specific fluorescence imaging reveals that Mito-HS has the ability to distinguish cancer cells from normal cells based on the level of endogenous H2S formation...
July 24, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28736630/current-biologics-for-treatment-of-biliary-tract-cancers
#6
REVIEW
Diana Y Zhao, Kian-Huat Lim
Biliary tract cancers (BTC) is a group of malignancies that arise from the epithelial cells of the biliary tree. These cancers are typically classified by anatomic site of origin: intrahepatic cholangiocarcinoma (IHCC) and extrahepatic cholangiocarcinoma (EHCC), and gallbladder cancer (GBC). To date, complete surgical resection remains the mainstay of treatment especially for earlier stage disease. Unfortunately, most patients present with advanced or metastatic disease, when systemic chemotherapy is the only treatment option...
June 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28736628/predictive-and-prognostic-biomarkers-in-personalized-gastrointestinal-cancer-treatment
#7
REVIEW
Helena Verdaguer, Tamara Saurí, Teresa Macarulla
Biomarkers play an important role in the detection and management of cancer patients. In gastrointestinal cancer, there is increasing interest in their development and validation according to specific tumor type. Prognostic biomarkers enable identification of patients with a more aggressive tumor evolution, while predictive biomarkers permit the identification of patients with a higher probability of responding or not to a specific treatment. Several biomarkers are currently widely employed in gastrointestinal cancers...
June 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28736627/personalized-and-precision-medicine-integrating-genomics-into-treatment-decisions-in-gastrointestinal-malignancies
#8
REVIEW
Trang H Au, Kai Wang, David Stenehjem, Ignacio Garrido-Laguna
The advent of next generation sequencing (NGS) technologies has advanced our understanding of the intrinsic biology of different gastrointestinal (GI) tumor types. The use of novel, more efficient sequencing platforms has improved turnaround times of sequencing results. This is providing real time opportunities to put precision medicine to the test. A number of early phase clinical trials are testing targeted therapies in unique molecularly characterized subsets of patients (baskets). While basket studies are gaining momentum, treatment failures serve to remind us that shifting from a histology-driven to a histology-agnostic approach is unlikely to be a failure-free strategy for a number of tumor types as recently learnt from vemurafenib failure in BRAF mutated metastatic colorectal cancer (mCRC)...
June 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28736583/microrna-profiling-of-ovarian-granulosa-cell-tumours-reveals-novel-diagnostic-and-prognostic-markers
#9
Wei-Tzu Cheng, Roseanne Rosario, Anita Muthukaruppan, Michelle K Wilson, Kathryn Payne, Peter C Fong, Andrew N Shelling, Cherie Blenkiron
BACKGROUND: The aim of this study was to explore the clinical utility of microRNAs (miRNAs) as improved markers of ovarian granulosa cell tumours (GCTs) for cancer diagnosis and prognosis prediction. Current histopathological and genetic markers, such as the presence of a FOXL2 gene mutation to distinguish between the two major subtypes are not wholly accurate and as such novel biomarkers are warranted. METHODS: The miRNA expression profiles of five formalin-fixed, paraffin-embedded (FFPE) adult-GCTs and five juvenile-GCTs were assessed using Affymetrix miRNA 3...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28736317/next-generation-proteomics-and-its-application-to-clinical-breast-cancer-research
#10
REVIEW
Mariya Mardamshina, Tamar Geiger
Proteomics technology aims to map the protein landscapes of biological samples, and can be applied to a variety of samples, including cells, tissues, and body fluids. As the proteins are the main functional molecules in the cells, their levels reflect much more accurately the cellular phenotype and the regulatory processes within them than gene levels, mutations, and even mRNA levels. With the advancement in the technology, it is possible nowadays to obtain comprehensive views of the biological systems, and study large patient cohorts in a streamlined manner...
July 20, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28736238/the-pursuit-of-therapeutic-biomarkers-with-high-throughput-cancer-cell-drug-screens
#11
REVIEW
Steven P Williams, Ultan McDermott
In the last decade we have witnessed tremendous advances in our understanding of the landscape of the molecular alterations that underpin many of the most prevalent cancers, in the use of automated high-throughput platforms for high-throughput drug screens in cancer cells, in the creation of more clinically relevant cancer cell models, and lastly in the development of more useful computational approaches in the pursuit of biomarkers of drug response. Separately, each of these improvements will undoubtedly lead to improvements in the treatment of cancer patients but to fulfill the promise of truly personalized cancer medicine, we must bring these disciplines together in a truly multidisciplinary fashion...
July 12, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28735743/exposure-to-meat-derived-carcinogens-and-bulky-dna-adduct-levels-in-normal-appearing-colon-mucosa
#12
Vikki Ho, Vanessa Brunetti, Sarah Peacock, Thomas E Massey, Roger W L Godschalk, Frederik J van Schooten, Janet E Ashbury, Stephen J Vanner, Will D King
INTRODUCTION: Meat consumption is a risk factor for colorectal cancer. This research investigated the relationship between meat-derived carcinogen exposure and bulky DNA adduct levels, a biomarker of DNA damage, in colon mucosa. METHODS: Least squares regression was used to examine the relationship between meat-derived carcinogen exposure (PhIP and meat mutagenicity) and bulky DNA adduct levels in normal-appearing colon tissue measured using (32)P-postlabelling among 202 patients undergoing a screening colonoscopy...
September 2017: Mutation Research
https://www.readbyqxmd.com/read/28735685/utilizing-circulating-tumour-dna-in-radiation-oncology
#13
REVIEW
Ariana Rostami, Scott V Bratman
Emerging technologies for detection of circulating tumour DNA (ctDNA) are expanding the possibilities for clinical impact to patients with localized, potentially curable cancer. For such patients, ctDNA analysis could aid in prognostication, prediction of treatment response, longitudinal monitoring for adaptive treatment, and evaluation of minimal residual disease. Radiation oncologists currently have few tools at their disposal for predicting or rapidly assessing treatment efficacy. By reflecting the genetic and epigenetic makeup of tumours as well as dynamic changes with treatment, ctDNA as a biomarker for radiation response could enable new personalized treatment approaches...
July 20, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28735300/caveolin-1-expression-as-a-prognostic-marker-in-triple-negative-breast-cancers-of-asian-women
#14
Joe Yeong, Aye Aye Thike, Murasaki Ikeda, Jeffrey Chun Tatt Lim, Bernett Lee, Seigo Nakamura, Jabed Iqbal, Puay Hoon Tan
BACKGROUND: Triple-negative breast cancers (TNBCs) are defined by their lack of oestrogen receptor, progesterone receptor and epidermal growth factor receptor 2. Although heterogeneous, the majority are aggressive and treatment options are limited. Caveolin acts as tumour suppressor or promoter depending on the cancer type. AIM: In this study, we aimed to determine if the expression levels of the candidate biomarker caveolin-1 on stromal or tumour cells were associated with clinicopathological parameters and disease outcomes in TNBCs from an ethnically diverse cohort of Asian women...
July 22, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28735000/application-of-pharmacometrics-and-quantitative-systems-pharmacology-to-cancer-therapy-the-example-of-luminal-a-breast-cancer
#15
REVIEW
Brett Fleisher, Kayla Andrews, Ashley A Brown, Sihem Ait-Oudhia
Breast cancer (BC) is the most common cancer in women, and the second most frequent cause of cancer-related deaths in women worldwide. It is a heterogeneous disease composed of multiple subtypes with distinct morphologies and clinical implications. Quantitative systems pharmacology (QSP) is an emerging discipline bridging systems biology with pharmacokinetics (PK) and pharmacodynamics (PD) leveraging the systematic understanding of drugs' efficacy and toxicity. Despite numerous challenges in applying computational methodologies for QSP and mechanism-based PK/PD models to biological, physiological, and pharmacological data, bridging these disciplines has the potential to enhance our understanding of complex disease systems such as BC...
July 19, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28734806/snora21-an-oncogenic-small-nucleolar-rna-with-a-prognostic-biomarker-potential-in-human-colorectal-cancer
#16
Kazuhiro Yoshida, Shusuke Toden, Wenhao Weng, Kunitoshi Shigeyasu, Jinsei Miyoshi, Jacob Turner, Takeshi Nagasaka, Yanlei Ma, Tetsuji Takayama, Toshiyoshi Fujiwara, Ajay Goel
BACKGROUND: Emerging evidence indicates that small nucleolar RNAs (snoRNAs) play a central role in oncogenesis. Herein, we systematically evaluated expression profiles of snoRNAs in colorectal cancer (CRC) and investigated their clinical and functional role in this malignancy. METHODS: We compared expression levels of snoRNAs between cancer and normal tissues using publicly available datasets and identified the most differentially expressed and commonly upregulated snoRNAs in CRC...
July 12, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28734369/systematic-comparison-of-exosomal-proteomes-from-human-saliva-and-serum-for-the-detection-of-lung-cancer
#17
Yan Sun, Sha Liu, Zhi Qiao, Zhi Shang, Zhijun Xia, Xiaomin Niu, Liqiang Qian, Yan Zhang, Liuyin Fan, Cheng-Xi Cao, Hua Xiao
Circulating tumor exosomes harbor plenty of cancer biological information, which have emerged as promising targets for cancer early detection and diagnosis. Human serum and saliva are unique diagnostic body fluids, which contain numerous circulating exosomes. It is necessary to establish standardized isolation method and compare their proteome profiling for translational medicine. High abundant proteins in these body fluids were removed before exosomes isolation and obtained exosomes were further confirmed by morphology analysis and surface biomarker test...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28733961/a-review-of-biomarkers-for-neurodegenerative-disease-will-they-swing-us-across-the-valley
#18
REVIEW
Thomas G Beach
Measures of the severity of cognitive impairment or parkinsonism are the usual endpoints in clinical trials for Alzheimer's disease (AD) and Parkinson's disease (PD), but are critically hampered by their lack of disease sensitivity and specificity. Due to the high failure rate of clinical trials, the rate of regulatory approval for efficacious new drugs has stagnated in the past few decades, with the gap between basic science discovery and clinical application metaphorically termed the "Valley of Death". While the causes for this are probably multiple and complex, the usage of biomarkers as surrogate endpoints, particularly when they are molecularly-specific for the disease, has achieved some success in cancer trials, and it is likely that neurodegenerative disease trials would benefit from the same approach...
July 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/28733557/down-regulation-of-lincrna-p21-contributes-to-gastric-cancer-development-through-hippo-independent-activation-of-yap
#19
Ying Chen, Guoqing Wei, Hongwei Xia, Huangfei Yu, Qiuling Tang, Feng Bi
Long intergenic non-coding RNA p21 (lincRNA-p21), known as the direct transcriptional target of p53, was found down-regulated in several human solid tumors. However, little is known about the role of lincRNA-p21 in gastric cancer. The expression levels of lincRNA-p21 in tissue samples and cell lines were detected by qRT-PCR. MGC-803 and MKN-45 cells were transfected with siRNAs targeting lincRNA-p21 or control siRNAs to determine the effect of reduced lincRNA-p21 expression on tumorigenesis. We also overexpressed lincRNA-p21 in MGC-803 cells...
July 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28733549/pretreatment-serum-lactate-level-as-a-prognostic-biomarker-in-patients-undergoing-supratentorial-primary-brain-tumor-resection
#20
Chung-Chih Shih, Tzong-Shiun Lee, Fon-Yih Tsuang, Pei-Lin Lin, Ya-Jung Cheng, Hsiao-Liang Cheng, Chun-Yu Wu
INTRODUCTION: Malignant primary brain tumors are one of the most aggressive cancers. Pretreatment serum nonneuronal biomarkers closely associated with postoperative outcomes are of high clinical relevance. The present study aimed to identify potential pretreatment serum biomarkers that may influence oncological outcomes in patients with primary brain tumors. METHODS: A total of 74 patients undergoing supratentorial primary brain tumor resection were enrolled. Before tumor resection, serum neuronal biomarkers, namely neuron-specific enolase (NSE), S100β, and glial fibrillary acidic protein (GFAP), and serum nonneuronal biomarkers, namely neutrophil gelatinase-associated lipocalin (NGAL), lactate dehydrogenase (LDH), and lactate, were measured and associated postoperative oncological outcomes, including brain tumor grading, progression-free survival (PFS), and overall survival (OS), were compared...
June 29, 2017: Oncotarget
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