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https://www.readbyqxmd.com/read/28529342/circulating-tumor-cells-and-serum-levels-of-mmp-2-mmp-9-and-vegf-as-markers-of-the-metastatic-process-in-patients-with-high-risk-of-metastatic-progression
#1
Marketa Skerenova, Veronika Mikulova, Otakar Capoun, Tomas Zima, Petra Tesarova
BACKGROUND AND AIMS: Metastases are a severe complication in cancer patients and biomarkers predicting their progression are still lacking for specific groups of patients. HER2 positive breast cancer (HER2 BC) patients on trastuzumab therapy are at risk of the development of unpredictable and often fatal central nervous system (CNS) metastases and castration resistant prostate cancer (CRPC) patients urgently need a marker of disease progression during therapy. Proposed metastatic markers: circulating tumor cells (CTC), serum levels of matrix metalloproteinase 2 (MMP-2), 9 (MMP-9) and vascular endothelial growth factor (VEGF) were prospectively studied to confirm their utility in these two narrowly defined groups of cancer patients...
May 16, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28526747/functional-regions-of-the-peroxin-pex19-necessary-for-peroxisome-biogenesis
#2
Gaurav Agrawal, Helen H Shang, Zhi-Jie Xia, Suresh Subramani
The peroxins Pex19 and Pex3 play an indispensable role in peroxisomal membrane protein (PMP) biogenesis, peroxisome division and inheritance. Pex19 plays multiple roles in these processes, but how these functions relate to the structural organization of the Pex19 domains is unresolved. To this end, using deletion mutants, we mapped the Pex19 regions required for peroxisome biogenesis in the yeast Pichia pastoris. Surprisingly, import-competent peroxisomes still formed when Pex19 domains previously believed to be required for biogenesis were deleted, although the peroxisome size was larger than that in wild-type cells...
May 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28524006/circulating-tumor-cells-a-reliable-biomarker-for-prostate-cancer-treatment-assessment
#3
Chiara Ciccarese, Rodolfo Montironi, Michelangelo Fiorentino, Guido Martignoni, Matteo Brunelli, Roberto Iacovelli, Antonio Lopez-Beltran, Liang Cheng, Marina Scarpelli, Holger Moch, Giampaolo Tortora, Francesco Massari
Prostate cancer is a common malignancy with highly molecular heterogeneity responsible for a wide spectrum of clinical behavior. To date, several treatment options are available, whose selection is currently based mainly on clinical criteria. Given the weakness of conventional imaging and PSA assay, the identification of a prognostic and predictive biomarker for choosing the appropriate treatment and monitoring its efficacy is a very topical issue in prostate cancer management. Circulating tumor cells (CTCs) have substantial promise for early tumor diagnosis, disease recurrence and metastatic spread monitoring as well as for biological tumor characterization, thus representing a reliable translational real-time biomarkers of prostate cancer...
May 18, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28523908/peptide-functionalized-nanomaterials-for-efficient-isolation-of-her2-positive-circulating-tumor-cells
#4
Jiaxi Peng, Qiong Zhao, Wangshu Zheng, Ping Li, Wenzhe Li, Ling Zhu, Xiaoran Liu, Bin Shao, Huiping Li, Chen Wang, Yanlian Yang
Specific antigen-positive circulating tumor cell (CTC) detection is necessary in therapeutic response monitoring and targeted therapy guidance. The existence of human epidermal growth factor receptor 2 (HER2) and the concentration of HER2-positive CTCs are strong indicators for patient diagnosis, prognosis, and therapeutic monitoring. We managed the direct isolation of HER2-positive CTCs by peptide-functionalized nanomaterials, designing and screening a peptide as an HER2 antibody alternative demonstrating high HER2 affinity and selectivity...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28523597/prognostic-value-of-chemotherapy-resistant-ck19mrna-positive-circulating-tumor-cells-in-patients-with-advanced-metastatic-non-small-cell-lung-cancer
#5
G Milaki, I Messaritakis, F Koinis, A Kotsakis, S Apostolaki, E K Dermitzaki, M Perraki, D Hatzidaki, V Georgoulias
BACKGROUND: The detection of circulating tumor cells (CTCs) is of prognostic significance in several tumor types. The present study evaluated the detection and the clinical relevance of CK19mRNA(+) CTCs in patients with advanced/metastatic non-small cell lung cancer before and after front-line chemotherapy. PATIENTS AND METHODS: Peripheral blood was obtained from 642 patients with treatment-naïve unresectable stage IIIB and IV non-small cell lung cancer and from 455 patients after the completion of 1st line chemotherapy...
May 18, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28521409/evaluation-of-a-novel-approach-to-circulating-tumor-cell-isolation-for-cancer-gene-panel-analysis-in-patients-with-breast-cancer
#6
Soo Jeong Lee, Cham Han Lee, Sung Ho Choi, Sei Hyun Ahn, Byung Ho Son, Jong Won Lee, Jong Han Yu, Nak-Jung Kwon, Woo Chung Lee, Kap-Seok Yang, Dong Hyoung Lee, Du Yeol Han, Mi So Choi, Pyeong-Soo Park, Hyun Kyung Lee, Myoung Shin Kim, Jinseon Lee, Byung Hee Jeon
Liquid biopsy isolation of circulating tumor cells (CTCs) allows the genomic analysis of CTCs, which is useful in the determination of personalized cancer therapy. In the present study, CTCs from patients with breast cancer were enriched and successfully analyzed using cancer gene panel analysis. Blood samples from 11 patients with breast cancer were collected and CTCs enriched for using size-based filtration. The enriched CTCs were analyzed using immunofluorescence staining with antibodies directed against epithelial cell adhesion molecule (EpCAM) and cluster of differentiation 45...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28521303/emt-circulating-tumor-cells-detected-by-cell-surface-vimentin-are-associated-with-prostate-cancer-progression
#7
Arun Satelli, Izhar Batth, Zachary Brownlee, Abhishek Mitra, Shouhao Zhou, Hyangsoon Noh, Christina R Rojas, Heming Li, Qing H Meng, Shulin Li
Recent advances in the field of circulating tumor cells (CTC) have shown promise in this liquid biopsy-based prognosis of patient outcome. However, not all of the circulating cells are tumor cells, as evidenced by a lack of tumor-specific markers. The current FDA standard for capturing CTCs (CellSearch) relies on an epithelial marker and cells captured via CellSearch cannot be considered to have undergone EMT. Therefore, it is difficult to ascertain the presence and relevance of any mesenchymal or EMT-like CTCs...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28511705/pd-l1-expressing-circulating-tumour-cells-in-head-and-neck-cancers
#8
Arutha Kulasinghe, Chris Perry, Liz Kenny, Majid E Warkiani, Colleen Nelson, Chamindie Punyadeera
BACKGROUND: Blockade of the PD-1/PD-L1 immune checkpoint pathway is emerging as a promising immunotherapeutic approach for the management and treatment of head and neck cancer patients who do not respond to 1st/2nd line therapy. However, as checkpoint inhibitors are cost intensive, identifying patients who would most likely benefit from anti PD-L1 therapy is required. Developing a non-invasive technique would be of major benefit to the patient and to the health care system. CASE PRESENTATION: We report the case of a 56 year old man affected by a supraglottic squamous cell carcinoma (SCC)...
May 16, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28511601/satisfaction-of-patients-attending-public-hiv-or-aids-care-and-treatment-centers-in-kinondoni-district-tanzania
#9
Joel Ndayongeje, Method Kazaura
Satisfaction of care and treatment among HIV patients is one of the important elements for adherence. This study aimed to determine levels of satisfaction and associated factors among HIV-infected patients attending public care and treatment centers (CTCs) in Tanzania. The study was cross-sectional using face-to-face interviews. Satisfaction was measured using a total of 30 questions from a domain of six area of CTC service delivery. To assess independent predictors of levels of satisfaction, we used multilevel ordinal logistic regression analysis...
January 2017: International Quarterly of Community Health Education
https://www.readbyqxmd.com/read/28510571/second-line-pazopanib-in-patients-with-relapsed-and-refractory-small-cell-lung-cancer-a-multicentre-phase-ii-study-of-the-hellenic-oncology-research-group
#10
F Koinis, S Agelaki, V Karavassilis, N Kentepozidis, E Samantas, S Peroukidis, P Katsaounis, E Hartabilas, I I Varthalitis, I Messaritakis, G Fountzilas, V Georgoulias, A Kotsakis
BACKGROUND: Pazopanib is a tyrosine kinase inhibitor with antiangiogenic activity. Vascular endothelial growth factor expression is increased in SCLC and is correlated with poor prognosis. The efficacy and tolerance of second-line pazopanib in SCLC was evaluated. PATIENTS AND METHODS: Patients with platinum-sensitive (cohort A; n=39) and -resistant/refractory (cohort B; n=19) SCLC were enrolled in a multicentre phase II study. The primary end point was the progression-free survival rate (PFS-R) at week 8 in each cohort...
May 16, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28509310/circulating-tumor-cells-in-different-stages-of-colorectal-cancer
#11
Petra Eliasova, Michael Pinkas, Katarina Kolostova, Robert Gurlich, Vladimir Bobek
INTRODUCTION: Liquid biopsies are noninvasive tests using blood or body fluids to detect circulating tumor cells (CTCs) or the products of tumor cells, such as fragments of nucleic acids or proteins that are shed into biological fluids from primary tumor or its metastates. The analysis of published clinical studies provides coherent evidence that the presence of CTCs detected in peripheral blood is a strong prognostic factor in patients with colorectal carcinoma (CRC). The aim of the study was to implement size-based separation protocol of CTCs in CRC patients...
2017: Folia Histochemica et Cytobiologica
https://www.readbyqxmd.com/read/28508152/detection-of-her2-amplification-in-circulating-tumor-cells-of-her2-negative-gastric-cancer-patients
#12
Yuji Mishima, Satoshi Matsusaka, Keisho Chin, Mariko Mikuniya, Sayuri Minowa, Tomoko Takayama, Harumi Shibata, Ryoko Kuniyoshi, Mariko Ogura, Yasuhito Terui, Nobuyuki Mizunuma, Kiyohiko Hatake
A key to the successful use of targeted cancer therapy is the ability to preselect patients who are likely to benefit from the treatment according to molecular markers. Assessment for predicting therapy response is mostly done using tumor biopsies. However, these might not truly represent all of the patient's malignant cells because of tumor heterogeneity and/or clonal evolution during disease progression. One potential strategy that can complement primary tumor biopsy is the analysis of circulating tumor cells (CTCs)...
May 15, 2017: Targeted Oncology
https://www.readbyqxmd.com/read/28507762/circulating-tumor-cell-clusters-associated-gene-plakoglobin-is-a-significant-prognostic-predictor-in-patients-with-breast-cancer
#13
Wataru Goto, Shinichiro Kashiwagi, Yuka Asano, Koji Takada, Katsuyuki Takahashi, Takaharu Hatano, Tsutomu Takashima, Shuhei Tomita, Hisashi Motomura, Masahiko Ohsawa, Kosei Hirakawa, Masaichi Ohira
BACKGROUND: Circulating tumor cells (CTCs) are linked to metastatic relapse and are regarded as a prognostic marker for human cancer. High expression of plakoglobin, a cell adhesion protein, within the primary tumor is positively associated with CTC clusters in breast cancer. In this study, we investigated the correlation between plakoglobin expression and survival of breast cancer. METHODS: We evaluated 121 breast cancer patients treated with neoadjuvant chemotherapy...
2017: Biomarker Research
https://www.readbyqxmd.com/read/28506696/current-approaches-for-avoiding-the-limitations-of-circulating-tumor-cells-detection-methods-implications-for-diagnosis-and-treatment-of-patients-with-solid-tumors
#14
REVIEW
Artur Kowalik, Magdalena Kowalewska, Stanisław Góźdź
Eight million people die of cancer each year and 90% of deaths are caused by systemic disease. Circulating tumor cells (CTCs) contribute to the formation of metastases and thus are the subject of extensive research and an abiding interest to biotechnology and pharmaceutical companies. Recent technological advances have resulted in greatly improved CTC detection, enumeration, expansion, and culture methods. However, despite the fact that nearly 150 years have passed since the first detection and description of CTCs in human blood and enormous technological progress that has taken place in this field, especially within the last decade, few CTC detection methods have been approved for routine clinical use...
April 26, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28498481/comparison-of-three-different-methods-for-the-detection-of-circulating-tumor-cells-in-mice-with-lung-metastasis
#15
Weifeng Xu, Bing Wu, Lengxi Fu, Junying Chen, Zeng Wang, Fei Huang, Jinrong Chen, Mei Zhang, Zhenhuan Zhang, Jingan Lin, Ruilong Lan, Ruiqing Chen, Wei Chen, Long Chen, Jinsheng Hong, Weijian Zhang, Yuxiong Ding, Paul Okunieff, Jianhua Lin, Lurong Zhang
Circulating tumor cells (CTCs) represent the key step of cancer cell dissemination. The alteration of CTCs correlates with the treatment outcome and prognosis. To enrich and identify CTCs from billions of blood cells renders a very challenging task, which triggers development of several methods, including lysis of RBC plus negative or positive enrichment using antibodies, and filter membrane or spiral microfluidics to capture CTCs. To compare the advantages of different enrichment methods for CTCs, we utilized the 4T1 breast cancer cells transfected with both green fluorescent protein (GFP) and luciferase to trace CTCs in the experimental lung metastasis model...
May 2, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28498319/ctc-mrna-ar-v7-analysis-from-blood-samples-impact-of-blood-collection-tube-and-storage-time
#16
Alison W S Luk, Yafeng Ma, Pei N Ding, Francis P Young, Wei Chua, Bavanthi Balakrishnar, Daniel T Dransfield, Paul de Souza, Therese M Becker
Circulating tumour cells (CTCs) are an emerging resource for monitoring cancer biomarkers. New technologies for CTC isolation and biomarker detection are increasingly sensitive, however, the ideal blood storage conditions to preserve CTC-specific mRNA biomarkers remains undetermined. Here we tested the preservation of tumour cells and CTC-mRNA over time in common anticoagulant ethylene-diamine-tetra-acetic acid (EDTA) and acid citrate dextrose solution B (Citrate) blood tubes compared to preservative-containing blood tubes...
May 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28497169/homogeneous-pancreatic-cancer-spheroids-mimic-growth-pattern-of-circulating-tumor-cell-clusters-and-macrometastases-displaying-heterogeneity-and-crater-like-structure-on-inner-layer
#17
Hao Feng, Bao-Chi Ou, Jing-Kun Zhao, Shuai Yin, Ai-Guo Lu, Eva Oechsle, Wolfgang E Thasler
PURPOSE: Pancreatic cancer 3D in vitro models including multicellular tumor spheroid (MCTS), single cell-derived tumor spheroid (SCTS), tissue-derived tumor spheroid, and organotypic models provided powerful platforms to mimic in vivo tumor. Recent work supports that circulating tumor cell (CTC) clusters are more efficient in metastasis seeding than single CTCs. The purpose of this study is to establish 3D culture models which can mimic single CTC, monoclonal CTC clusters, and the expansion of macrometastases...
May 11, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28496340/characteristics-of-circulating-tumor-cells-in-organ-metastases-prognosis-and-t-lymphocyte-mediated-immune-response
#18
Wen-Wen Sun, Zhi-Hong Xu, Peng Lian, Bei-Li Gao, Jia-An Hu
Circulating tumor cells (CTCs) possess profound influence on tumor metastases and disease progression. This study aimed to investigate the correlation of CTCs with clinical characteristics and T-cell immunity, and to explore whether CTCs and the subpopulations can serve as an independent prognostic factor in advanced non-small cell lung cancer (NSCLC). A prospective study was conducted in late stages of NSCLC patients. The levels of overall CTCs and the three subpopulation CTCs were enumerated using the CanPatrol™ CTC enrichment system...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28492978/seizure-response-to-perampanel-in-drug-resistant-epilepsy-with-gliomas-early-observations
#19
Charles Vecht, Alberto Duran-Peña, Caroline Houillier, Thomas Durand, Laurent Capelle, Gilles Huberfeld
Drug-resistant epilepsy (DRE) occurs commonly in gliomas, possibly due to a shared mechanism of AMPA-activation involving both seizure activity and tumor growth. We tested the AMPA-receptor blocker perampanel (PER) in patients with DRE in low- and high-grade gliomas. Seizure response was defined as 50% drop in seizure frequency or as seizure-freedom. Cognitive function was examined by computerized test on cognitive speed (CTCS), which is sensitive to the type of cognitive dysfunction associated with epilepsy and use of anticonvulsants...
May 10, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28492516/circulating-cell-free-dna-and-circulating-tumor-cells-as-prognostic-and-predictive-biomarkers-in-advanced-non-small-cell-lung-cancer-patients-treated-with-first-line-chemotherapy
#20
Simona Coco, Angela Alama, Irene Vanni, Vincenzo Fontana, Carlo Genova, Maria Giovanna Dal Bello, Anna Truini, Erika Rijavec, Federica Biello, Claudio Sini, Giovanni Burrafato, Claudia Maggioni, Giulia Barletta, Francesco Grossi
Cell-free DNA (cfDNA) and circulating tumor cells (CTCs) are promising prognostic and predictive biomarkers in non-small cell lung cancer (NSCLC). In this study, we examined the prognostic role of cfDNA and CTCs, in separate and joint analyses, in NSCLC patients receiving first line chemotherapy. Seventy-three patients with advanced NSCLC were enrolled in this study. CfDNA and CTC were analyzed at baseline and after two cycles of chemotherapy. Plasma cfDNA quantification was performed by quantitative PCR (qPCR) whereas CTCs were isolated by the ScreenCell Cyto (ScreenCell, Paris, France) device and enumerated according to malignant features...
May 11, 2017: International Journal of Molecular Sciences
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