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https://www.readbyqxmd.com/read/29156821/prognostic-significance-of-circulating-tumor-cells-in-non-small-cell-lung-cancer-patients-undergoing-chemotherapy
#1
Bing Tong, Yan Xu, Jing Zhao, Minjiang Chen, Jia Xing, Wei Zhong, Mengzhao Wang
The utility of circulating tumor cells (CTCs) as prognostic biomarkers in non-small cell lung cancer (NSCLC) is inconclusive due to the limitations of current CTC detection methods. Using a novel high-efficiency detection method, we determined the ability of CTCs to predict survival and chemotherapeutic responses in NSCLC. In 127 patients with advanced NSCLC, CTCs were counted and analyzed at baseline and during follow-up. Median overall survival (OS) and progression-free survival (PFS) were longer in patients with baseline CTC counts <8 CTCs/3...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156783/isolation-of-circulating-tumor-cells-from-pancreatic-cancer-by-automated-filtration
#2
Nora Brychta, Michael Drosch, Christiane Driemel, Johannes C Fischer, Rui P Neves, Irene Esposito, Wolfram Knoefel, Birte Möhlendick, Claudia Hille, Antje Stresemann, Thomas Krahn, Matthias U Kassack, Nikolas H Stoecklein, Oliver von Ahsen
It is now widely recognized that the isolation of circulating tumor cells based on cell surface markers might be hindered by variability in their protein expression. Especially in pancreatic cancer, isolation based only on EpCAM expression has produced very diverse results. Methods that are independent of surface markers and therefore independent of phenotypical changes in the circulating cells might increase CTC recovery also in pancreatic cancer. We compared an EpCAM-dependent (IsoFlux) and a size-dependent (automated Siemens Healthineers filtration device) isolation method for the enrichment of pancreatic cancer CTCs...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29155157/synthesis-characterization-and-the-antifungal-activity-of-chitosan-derivatives-containing-urea-groups
#3
Jingjing Zhang, Wenqiang Tan, Zhenpeng Zhang, Yinping Song, Qing Li, Fang Dong, Zhanyong Guo
As an abundant and renewable polysaccharide, chitosan has been drawing broad attention due to its natural properties. For the further utilization of chitosan, chemical modification can be applied in improving its water solubility and the bioactivities. In this study, four chitosan derivatives were synthesized by the reaction of chloracetyl chitosan derivative with quaternary ammonium salt (CTCS) and urea groups bearing 4-amino-pyridine, including BCTCS, 2CBCTCS, 3CBCTCS, and 4CBCTCS. The structure characteristics of synthesized products were established based on FT-IR spectroscopy, (1)H NMR, and elemental analysis...
November 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29152114/comparison-of-isolation-platforms-for-detection-of-circulating-renal-cell-carcinoma-cells
#4
Yvonne Maertens, Verena Humberg, Franziska Erlmeier, Sandra Steffens, Julie Steinestel, Martin Bögemann, Andres Jan Schrader, Christof Bernemann
Background: Analysis of circulating tumor cells (CTCs) has progressed in several tumor entities. However, little is known about CTCs in clear cell renal cell carcinoma (ccRCC) patients. Aim of our studies was to build a stable in vitro fundament for isolation of CTCs in ccRCC. Methods: We compared the analytical performance of different CTC isolation methods with regard to yield and purity: EpCAM based enrichment, leukocyte depletion and size based enrichment. EpCAM and cytokeratin 8 (KRT8) as biomarker for CTCs expression were evaluated in ccRCC cell lines as well as clinical samples...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29151279/detection-of-ctcs-in-cervical-cancer-using-a-conditionally-replicative-adenovirus-targeting-telomerase-positive-cells
#5
Masahiro Takakura, Takeo Matsumoto, Mitsuhiro Nakamura, Yasunari Mizumoto, Subaru Myojyo, Rena Yamazaki, Jyunpei Iwadare, Yukiko Bono, Shunsuke Orisaka, Takeshi Obata, Takashi Izuka, Kyosuke Kagami, Kentaro Nakayama, Hideki Hayakawa, Fuminori Sakurai, Hiroyuki Mizuguchi, Yasuo Urata, Toshiyoshi Fujiwara, Satoru Kyo, Toshiyuki Sasagawa, Hiroshi Fujiwara
Circulating tumor cells (CTCs) are newly discovered biomarkers of cancers. Although many systems detect CTCs, a gold standard has not yet been established. We analyzed CTCs in uterine cervical cancer patients using an advanced version of conditionally replicative adenovirus targeting telomerase-positive cells, which was enabled to infect coxsackievirus-adenovirus receptor-negative cells and to reduce false-positive signals in myeloid cells. Blood samples from cervical cancer patients were hemolyzed and infected with the virus and then labeled with fluorescent anti-CD45 and anti-pan cytokeratin antibodies...
November 19, 2017: Cancer Science
https://www.readbyqxmd.com/read/29146630/a-role-for-cxcr4-in-peritoneal-and-hematogenous-ovarian-cancer-dissemination
#6
Agnes Figueras, Elisenda Alsina-Sanchís, Alvaro Lahiguera, Manuel Abreu, Laura Muinelo-Romay, Gema Moreno-Bueno, Oriol Casanovas, Mariona Graupera, Xavier Matias-Guiu, August Vidal, Alberto Villanueva, Francesc Viñals
Epithelial ovarian cancer is characterized by a low recovery rate because the disease is typically diagnosed at an advanced stage, by which time, most patients (80%) already exhibit disseminated neoplasia. The cytokine receptor CXCR4 has been implicated in the development of metastasis in various tumor types. Using a patient-derived tissue macroarray and mRNA expression analysis we observed high CXCR4 levels in high-grade serous epithelial ovarian carcinomas, the most metastatic tumor, compared with those in endometrioid carcinomas...
November 16, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29144792/effect-of-blood-collection-tube-type-and-time-to-processing-on-the-enumeration-and-high-content-characterization-of-circulating-tumor-cells-using-the-high-definition-single-cell-assay
#7
Mariam Rodríguez-Lee, Anand Kolatkar, Madelyn McCormick, Angel D Dago, Jude Kendall, Nils Anders Carlsson, Kelly Bethel, Emily J Greenspan, Shelley E Hwang, Kathryn R Waitman, Jorge J Nieva, James Hicks, Peter Kuhn
CONTEXT: - As circulating tumor cell (CTC) assays gain clinical relevance, it is essential to address preanalytic variability and to develop standard operating procedures for sample handling in order to successfully implement genomically informed, precision health care. OBJECTIVE: - To evaluate the effects of blood collection tube (BCT) type and time-to-assay (TTA) on the enumeration and high-content characterization of CTCs by using the high-definition single-cell assay (HD-SCA)...
November 16, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/29143247/using-circulating-tumor-cells-to-evaluate-the-efficacy-of-irreversible-electroporation-for-unresectasble-pancreatic-cancer
#8
Mao Lin, Mohammed Alnaggar, Shu-Zhen Liang, Jian Shi, Li-Zhi Niu, Ji-Bing Chen, Ke-Cheng Xu
We used circulating tumor cells (CTCs) as biomarkers to evaluate the efficacy of pre-irreversible electroporation (IRE) and post-IRE for unresectable pancreatic cancer (PC). Real-time qPCR was used to detect potential biomarker genes in CTCs, and magnetic-activated cell sorting (MACS) and fluorescence-activated cell sorting (FACS) were performed on 43 patients with PC who underwent IRE. Some patients experienced adverse reactions within 30 days of the operation, including arrhythmia (6.9%), intraoperative transient change of blood pressure (25...
November 15, 2017: Immunologic Research
https://www.readbyqxmd.com/read/29141291/-peripheral-blood-circulating-tumor-cells-in-local-advanced-head-and-neck-squamous-cell-carcinoma
#9
J L Lou, L Guo, W H Zheng, J Z Zhao, J Q Zhao, Z Liang, S Y Wang, M Y Fang
Objective: To investigate the value of detecting circulating tumor cells (CTCs) in patients with local advanced head and neck squamous cell carcinoma (LAHNSCC). Methods: Twenty cases of LAHNSCC and eight healthy cases as the negative control were collected. The clinicopathological factors were evaluated. The LAHNSCC CTCs were enriched by specific antibody nanofluidic chip immunoassay using CytoSorter CTCs sorting system. LAHNSCC CTCs were identified by immunofluorescence staining. The relationships between CTCs and the clinicopathological features of LAHNSCC were analyzed...
November 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/29139486/simple-and-rapid-colorimetric-detection-of-melanoma-circulating-tumor-cells-using-bifunctional-magnetic-nanoparticles
#10
Junrong Li, Jing Wang, Yuling Wang, Matt Trau
Circulating tumor cells (CTCs) are a promising biomarker for monitoring cancer metastasis and therapy response. However, the rarity and inherent fragility of CTCs pose great challenges for CTC detection. Currently, CTC detection requires advanced instruments that might be inaccessible in most hospitals or labs. To allow simple and rapid CTC detection, we propose a sensor platform that relies only on the intrinsic properties of magnetic nanoparticles (MNPs) including rapid separation as well as nanozyme activity...
November 15, 2017: Analyst
https://www.readbyqxmd.com/read/29134128/a-preliminary-study-for-the-assessment-of-pd-l1-and-pd-l2-on-circulating-tumor-cells-by-microfluidic-based-chipcytometry
#11
Jinkai Teo, Anja Mirenska, Meihui Tan, Yifang Lee, Janice Oh, Lewis Z Hong, Richard Wnek, Yoon-Sim Yap, Shian-Jiun Shih, Ali Asgar S Bhagat, Chih-Liang Chin, David Ag Skibinski
Aim: Expression of PD-L1 in the tumor is associated with more favorable responses to anti-PD-1 therapy in multiple cancers. However, obtaining tumor biopsies for PD-L1 interrogation is an invasive procedure and challenging to assess repeatedly as the disease progresses. Materials & methods: Here we assess an alternative, minimally invasive approach to analyze blood samples for circulating tumor cells (CTCs) that have broken away from the tumor and entered the periphery...
November 2017: Future Science OA
https://www.readbyqxmd.com/read/29132396/circulating-cell-free-dna-and-circulating-tumor-cells-the-liquid-biopsies-in-ovarian-cancer
#12
REVIEW
Xianliang Cheng, Lei Zhang, Yajuan Chen, Chen Qing
Limited understanding of ovarian cancer (OC) genome portrait has hindered the therapeutic advances. The serial monitoring of tumor genotypes is becoming increasingly attainable with circulating cell-free DNA (cf-DNA) and circulating tumor cells (CTCs) emerging as "liquid biopsies". They represent non-invasive biomarkers and are viable, as they can be isolated from human plasma, serum and other body fluids. Molecular characterization of circulating tumor DNA (ct-DNA) and CTCs offer unique potentials to better understand the biology of metastasis and resistance to therapies...
November 13, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/29132051/high-purity-capture-of-ctcs-based-on-micro-beads-enhanced-isolation-by-size-of-epithelial-tumor-cells-iset-method
#13
Na Sun, Xinpan Li, Zhili Wang, Yuzhi Li, Renjun Pei
In this paper, we develop a low-cost size-based microfluidic chip using conventional polycarbonate membrane to isolate CTCs from blood, and propose a strategy to increase the capture efficiency before cell filtration by a size enlargement method utilizing modified microbeads specifically binding to CTCs. Up to 91% of target cells were isolated from whole blood samples using our microfluidic capture system at a flow rate of 1mL/min. Moreover, a WBC depletion process is introduced which greatly decreases the WBC retaining on the filter membrane...
November 7, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29128899/a-no-touch-technique-for-pulmonary-wedge-resection-of-lung-cancer
#14
Noriyoshi Sawabata, Takeru Hyakutaka, Takeshi Kawaguchi, Motoaki Yasukawa, Norikazu Kawai, Takashi Tojo, Shigeki Taniguchi
OBJECTIVE: Many of the surgical patients with lung cancer die by metastasis originated from circulating tumor cells (CTCs) which are seeds of metastases. A ring-shaped catching forceps, which generates the great pressure by compression, may reduce the risk of tumor cell spreading. Here, we investigated the efficacy of such forceps based on CTC occurrence. METHODS: Twenty-three patients with clinical stage IA lung cancer who underwent a pulmonary wedge resection were investigated in a clinical-pathological manner...
November 11, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29122836/multiplex-gene-expression-profiling-of-in-vivo-isolated-circulating-tumor-cells-in-high-risk-prostate-cancer-patients
#15
Athina Markou, Marifili Lazaridou, Panagiotis Paraskevopoulos, Shukun Chen, Monika Świerczewska, Joanna Budna, Andra Kuske, Tobias M Gorges, Simon A Joosse, Thomas Kroneis, Maciej Zabel, Peter Sedlmayr, Catherine Alix-Panabières, Klaus Pantel, Evi S Lianidou
BACKGROUND: Molecular characterization of circulating tumor cells (CTCs) is important for selecting patients for targeted treatments. We present, for the first time, results on gene expression profiling of CTCs isolated in vivo from high-risk prostate cancer (PCa) patients compared with CTC detected by 3 protein-based assays-CellSearch®, PSA-EPISPOT, and immunofluorescence of CellCollector® in vivo-captured CTCs-using the same blood draw. METHODS: EpCAM-positive CTCs were isolated in vivo using the CellCollector from 108 high-risk PCa patients and 36 healthy volunteers...
November 9, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29115932/prognostic-and-clinicopathological-significance-of-circulating-tumor-cells-detected-by-rt-pcr-in-non-metastatic-colorectal-cancer-a-meta-analysis-and-systematic-review
#16
Chaogang Yang, Kun Zou, Liang Zheng, Bin Xiong
BACKGROUND: Circulating tumor cells (CTCs) have been accepted as a prognostic marker in patients with metastatic colorectal cancer (mCRC, UICC stage IV). However, the prognostic value of CTCs in patients with non-metastatic colorectal cancer (non-mCRC, UICC stage I-III) still remains in dispute. A meta-analysis was performed to investigate the prognostic significance of CTCs detected by the RT-PCR method in patients diagnosed with non-mCRC patients. METHODS: A comprehensive literature search for relevant articles was performed in the EmBase, PubMed, Ovid, Web of Science, Cochrane library and Google Scholar databases...
November 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29113414/epithelial-to-mesenchymal-transition-circulating-tumor-cells-and-cancer-metastasis-mechanisms-and-clinical-applications
#17
REVIEW
Xiao-Xiang Jie, Xiao-Yan Zhang, Cong-Jian Xu
Epithelial-to-mesenchymal transition (EMT) endows epithelial cells with enhanced motility and invasiveness, allowing them to participate in many physiological and pathological processes. Epithelial-to-mesenchymal transition contributes to the generation of circulating tumor cells (CTCs) in epithelial cancers because it increases tumor cell invasiveness, promotes tumor cell intravasation and ensures tumor cell survival in the peripheral system. Although the contribution of epithelial-to-mesenchymal transition to tumor cell invasiveness has been confirmed, the role epithelial-to-mesenchymal transition plays in metastasis remains debated...
October 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/29113213/correlation-between-the-presence-of-circulating-tumor-cells-and-the-pathologic-type-and-staging-of-non-small-cell-lung-cancer-during-the-early-postoperative-period
#18
Zhanqiang Xie, Xiaotian Gao, Keluo Cheng, Lishuang Yu
This study investigated possible correlations between the presence of circulating tumor cells (CTCs) and the pathologic types and staging of non-small cell lung cancer (NSCLC) during the early postoperative period. Sixty-nine patients with NSCLC were enrolled in the study. Clinical staging was performed by postoperative pathological examination and imaging. Multiple mRNA in situ analyses targeting specifically expressed genes were carried out to identify the presence of CTCs. Correlations between age, sex, TNM stage and pathological types with the detection rate of CTCs were also established...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29110843/frequency-and-clinical-impact-of-preoperative-circulating-tumor-cells-in-resectable-non-metastatic-lung-adenocarcinomas
#19
Nadia Dandachi, Verena Tiran, Joerg Lindenmann, Luka Brcic, Nicole Fink-Neuboeck, Karl Kashofer, Gudrun Absenger, Angelika Bezan, Richard J Cote, Ram Datar, Marija Balic
OBJECTIVES: Despite successful surgery, 30-50% of patients with resectable non-small cell lung cancer develop tumor recurrence within 5 years of surgery. MATERIALS AND METHODS: In this prospective study, we performed CTC enumerations in 40 patients with non-metastatic lung adenocarcinoma (NMLA) using a size-based microfilter. Additionally, cfDNA isolated from plasma was analyzed in 35 out of 40 patients. RESULTS: CTCs were identified in 15 out of 40 patients (37...
November 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29108279/size-based-detection-of-sarcoma-circulating-tumor-cells-and-cell-clusters
#20
Masanori Hayashi, Peixuan Zhu, Gregory McCarty, Christian F Meyer, Christine A Pratilas, Adam Levin, Carol D Morris, Catherine M Albert, Kyle W Jackson, Cha-Mei Tang, David M Loeb
Metastatic disease is the most important factor in determining the survival of sarcoma patients. Since sarcoma metastasis is predominantly hematogenous, we hypothesized that detection and quantification of circulating tumor cells (CTCs) could reflect response to therapy and risk of metastatic relapse. We evaluated the presence of CTCs using a novel animal model and in the blood of patients with high grade sarcomas utilizing the CellSieve™ size-based low pressure microfiltration system. Sarcoma CTCs were identified based on antibody staining patterns and nuclear morphology...
October 3, 2017: Oncotarget
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