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https://www.readbyqxmd.com/read/28821205/cerebrospinal-fluid-circulating-tumor-cells-a-novel-tool-to-diagnose-leptomeningeal-metastases-from-epithelial-tumors
#1
Xuling Lin, Martin Fleisher, Marc Rosenblum, Oscar Lin, Adrienne Boire, Samuel Briggs, Yevgeniya Bensman, Brenda Hurtado, Larisa Shagabayeva, Lisa M DeAngelis, Katherine S Panageas, Antonio Omuro, Elena I Pentsova
Background: Diagnosis of leptomeningeal metastasis (LM) remains challenging due to low sensitivity of CSF cytology and infrequent unequivocal MRI findings. In a previous pilot study, we showed that rare cell capture technology (RCCT) could be used to detect circulating tumor cells (CTC) in the CSF of patients with LM from epithelial tumors. To establish the diagnostic accuracy of CSF-CTC in the diagnosis of LM, we applied this technique in a distinct, larger cohort of patients. Methods: In this institutional review board-approved prospective study, patients with epithelial tumors and clinical suspicion of LM underwent CSF-CTC evaluation and standard MRI and CSF cytology examination...
September 1, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28819860/circulating-tumor-cells-markers-and-methodologies-for-enrichment-and-detection
#2
M J Alvarez Cubero, J A Lorente, I Robles-Fernandez, A Rodriguez-Martinez, J L Puche, M J Serrano
Cancer is a leading cause of disease worldwide; however, nowadays many points of its initiation processes are unknown. In this chapter, we are focusing on the role of liquid biopsies in cancer detection and progression. CTCs are one of the main components of liquid biopsies, they represent a subset of tumor cells that have acquired the ability to disseminate from the primary tumor and intravasate to the circulatory system. The greatest challenge in the detection of CTCs is their rarity in the blood. Human blood consists of white blood cells (5-10 × 10(6)/mL), red blood cells (5-9 × 10(9)/mL), and platelets (2...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819859/utilizing-matrigel-transwell-invasion-assay-to-detect-and-enumerate-circulating-tumor-cells
#3
Xingtong Liu, Xiangwei Wu
Metastasis is the cause of 90% of human cancer deaths. Circulating tumor cells (CTCs) in the peripheral blood and/or lymphatic vessels are cells shed from primary tumors and considered to be precursors of metastasis. Study of CTCs allows the serial monitoring of tumor progression and may provide predictive and prognostic biomarkers in clinic. Current CTC isolation and detection technologies encounter several challenges, including: heterogeneity of CTCs, low cell viability and/or high rate of contamination post-isolation, and the inability to distinguish viable/invasive from nonviable/nonfunctional CTCs, all of which can limit in vitro and in vivo characterization of CTCs...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819857/a-noninvasive-and-real-time-method-for-circulating-tumor-cell-detection-by-in-vivo-flow-cytometry
#4
Xunbin Wei, Jian Zhou, Xi Zhu, Xinrong Yang, Ping Yang, Qiyan Wang
The quantification of circulating tumor cells (CTCs) has been considered a potentially powerful tool in cancer diagnosis and prognosis, as CTCs have been shown to appear very early in cancer development. Great efforts have been made to develop methods that were less invasive and more sensitive to detect CTCs earlier. There is growing evidence that CTC clusters have greater metastatic potential than single CTCs. Therefore, the detection of CTC clusters is also important. This chapter is aimed to introduce a noninvasive technique for CTCs detection named in vivo flow cytometry (IVFC), which has been demonstrated to be capable of monitoring CTCs dynamics continuously...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819856/fiber-optic-array-scanning-technology-fast-for-detection-and-molecular-characterization-of-circulating-tumor-cells
#5
Zheng Ao, Xiaohe Liu
Circulating tumor cell (CTC) as an important component in "liquid biopsy" holds crucial clinical relevance in cancer prognosis, treatment efficiency evaluation, prediction and potentially early detection. Here, we present a Fiber-optic Array Scanning Technology (FAST) that enables antigen-agnostic, size-agnostic detection of CTC. By immunofluorescence staining detection of a combination of a panel of markers, FAST technology can be applied to detect rare CTC in non-small cell lung cancer (NSCLC) setting with high sensitivity and specificity...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819852/enumeration-dielectrophoretic-capture-and-molecular-analysis-of-circulating-tumor-cells
#6
Stephanie S Yee, Erica L Carpenter
The identification of therapeutically targetable mutations in circulating tumor cells (CTCs) from cancer patient blood is increasingly used to personalize patient care. Here, we describe a novel approach for the enumeration, capture, and molecular analysis of CTCs from blood using an FDA-approved CTC enrichment and enumeration platform followed by dielectrophoretic capture and next-generation sequencing.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819851/rarecyte-%C3%A2-ctc-analysis-step-3-using-the-cytepicker-%C3%A2-module-for-individual-cell-retrieval-and-subsequent-whole-genome-amplification-of-circulating-tumor-cells-for-genomic-analysis
#7
Jackie L Stilwell, Paulina Varshavskaya, Jeffrey L Werbin, Joshua J Nordberg, Arturo B Ramirez, Steve Quarre, Jay Tzucker, Jennifer Chow, Brennan Enright, Eric P Kaldjian
The CytePicker module built into the RareCyte CyteFinder instrument allows researchers to easily retrieve individual cells from microscope slides for genomic analyses, including array CGH, targeted sequencing, and next-generation sequencing. Here, we describe the semiautomated retrieval of CTCs from the blood processed by AccuCyte (see Chapter 13) and amplification of genomic DNA so that molecular analysis can be performed.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819850/rarecyte-%C3%A2-ctc-analysis-step-2-detection-of-circulating-tumor-cells-by-cytefinder-%C3%A2-automated-scanning-and-semiautomated-image-analysis
#8
Jeffrey L Werbin, Joshua J Nordberg, Jay Tzucker, Paulina Varshavskaya, Jackie L Stilwell, Eric P Kaldjian
The RareCyte CyteFinder instrument is an automated scanner that allows rapid identification of circulating tumor cells (CTCs) on microscope slides prepared by the AccuCyte process (see Chapter 13 ) and stained by immunofluorescence. Here, we present the workflow for CyteFinder scanning, analysis, and CyteMapper scan review which includes CTC confirmation and report generation.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819849/rarecyte%C3%A2-ctc-analysis-step-1-accucyte%C3%A2-sample-preparation-for-the-comprehensive-recovery-of-nucleated-cells-from-whole-blood
#9
Arturo B Ramirez, Lance U'Ren, Daniel E Campton, David Stewart, Joshua J Nordberg, Jackie L Stilwell, Eric P Kaldjian
The RareCyte platform addresses important technology limitations of current circulating tumor cell (CTC) collection methods, and expands CTC interrogation to include advanced phenotypic characterization and single-cell molecular analysis. In this respect, it represents the "next generation" of cell-based liquid biopsy technologies. In order to identify and analyze CTCs, RareCyte has developed an integrated sample preparation, imaging and individual cell retrieval process. The first step in the process, AccuCyte(®), allows the separation, collection, and transfer to a slide the nucleated cell fraction of the blood that contains CTCs...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819846/filter-adapted-fluorescent-in-situ-hybridization-fa-fish-for-filtration-enriched-circulating-tumor-cells
#10
Marianne Oulhen, Emma Pailler, Vincent Faugeroux, Françoise Farace
Circulating tumor cells (CTCs) may represent an easily accessible source of tumor material to assess genetic aberrations such as gene-rearrangements or gene-amplifications and screen cancer patients eligible for targeted therapies. As the number of CTCs is a critical parameter to identify such biomarkers, we developed fluorescent in situ hybridization (FISH) for CTCs enriched on filters (filter-adapted-FISH, FA-FISH). Here, we describe the FA-FISH protocol, the combination of immunofluorescent staining (DAPI/CD45) and FA-FISH techniques, as well as the semi-automated microscopy method that we developed to improve the feasibility and reliability of FISH analyses in filtration-enriched CTC...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819844/fourier-ptychographic-microscopy-for-rapid-high-resolution-imaging-of-circulating-tumor-cells-enriched-by-microfiltration
#11
Anthony Williams, Jaebum Chung, Changhuei Yang, Richard J Cote
Examining the hematogenous compartment for evidence of metastasis has increased significantly within the oncology research community in recent years, due to the development of technologies aimed at the enrichment of circulating tumor cells (CTCs), the subpopulation of primary tumor cells that gain access to the circulatory system and are responsible for colonization at distant sites. In contrast to other technologies, filtration-based CTC enrichment, which exploits differences in size between larger tumor cells and surrounding smaller, non-tumor blood cells, has the potential to improve CTC characterization through isolation of tumor cell populations with greater molecular heterogeneity...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819843/microfilter-based-capture-and-release-of-viable-circulating-tumor-cells
#12
Siddarth Rawal, Zheng Ao, Ram H Datar, Ashutosh Agarwal
Microfilters with slot-pore geometry can be used for size-based capture of circulating tumor cells (CTC) from the blood of cancer patients. The slot pore geometry reduces the shear stress that the cells would typically experience during filtration process and allows the cells to remain viable. The microfilter provides a platform capable of high CTC capture efficiency; however, the release of these cells from the filter following capture is nontrivial, possibly due to the strong nonspecific electrostatic adhesion of CTC to the microfilter surface...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819841/microscale-laminar-vortices-for-high-purity-extraction-and-release-of-circulating-tumor-cells
#13
Soojung Claire Hur, James Che, Dino Di Carlo
Circulating tumor cells (CTCs) are disseminated tumor cells that reflect the tumors of origin and can provide a liquid biopsy that would potentially enable noninvasive tumor profiling, treatment monitoring, and identification of targeted treatments. Accurate and rapid purification of CTCs holds great potential to improve cancer care but the task remains technically challenging. Microfluidic isolation of CTCs within microscale vortices enables high-throughput and size-based purification of rare CTCs from bodily fluids...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819840/microfluidic-based-enrichment-and-retrieval-of-circulating-tumor-cells-for-rt-pcr-analysis
#14
Priya Gogoi, Saedeh Sepehri, Will Chow, Kalyan Handique, Yixin Wang
Molecular analysis of circulating tumor cells (CTCs) is hindered by low sensitivity and high level of background leukocytes of currently available CTC enrichment technologies. We have developed a novel device to enrich and retrieve CTCs from blood samples by using a microfluidic chip. The Celsee PREP100 device captures CTCs with high sensitivity and allows the captured CTCs to be retrieved for molecular analysis. It uses the microfluidic chip which has approximately 56,320 capture chambers. Based on differences in cell size and deformability, each chamber ensures that small blood escape while larger CTCs of varying sizes are trapped and isolated in the chambers...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819839/a-novel-microfluidic-device-for-isolation-of-circulating-tumor-cells-from-pancreatic-cancer-blood-samples
#15
Jose I Varillas, Kangfu Chen, Jinling Zhang, Thomas J George, Z Hugh Fan
Enumeration of circulating tumor cells (CTCs) can provide valuable prognostic information to guide cancer treatment as well as help monitor disease progression. Analysis of these rare malignant cells has the potential to further our understanding of cancer metastasis by gaining insights into CTC characteristics and properties. Microfluidics presents a unique platform to isolate and study CTCs. In this chapter, we describe the detailed procedures for the fabrication and use of a microfluidic device to detect CTCs from the blood of pancreatic cancer patients...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819838/microfluidic-separation-of-circulating-tumor-cells-based-on-size-and-deformability
#16
Emily S Park, Simon P Duffy, Hongshen Ma
Circulating tumor cells (CTCs) have been implicated as the seeds of cancer metastasis and therefore have the potential to provide significant prognostic and diagnostic values. Here, we describe a procedure for separating CTCs from whole blood based on size and deformability using the microfluidic ratchet device. This device leverages the ratcheting motion of single cells created as they are deformed through funnel-shaped constrictions using oscillatory flow in order to divert cells based on differences in size and deformability...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819450/circulating-tumor-cells-moving-biological-insights-into-detection
#17
REVIEW
Lichan Chen, Ann M Bode, Zigang Dong
Circulating tumor cells (CTCs) have shown promising potential as liquid biopsies that facilitate early detection, prognosis, therapeutic target selection and monitoring treatment response. CTCs in most cancer patients are low in abundance and heterogeneous in morphological and phenotypic profiles, which complicate their enrichment and subsequent characterization. Several methodologies for CTC enrichment and characterization have been developed over the past few years. However, integrating recent advances in CTC biology into these methodologies and the selection of appropriate enrichment and characterization methods for specific applications are needed to improve the reliability of CTC biopsies...
2017: Theranostics
https://www.readbyqxmd.com/read/28819424/circulating-tumor-cells-and-microemboli-can-differentiate-malignant-and-benign-pulmonary-lesions
#18
Mario Mascalchi, Cristina Maddau, Lapo Sali, Elena Bertelli, Francesca Salvianti, Stefania Zuccherelli, Marzia Matucci, Alessandra Borgheresi, Claudio Raspanti, Monica Lanzetta, Massimo Falchini, Ernesto Mazza, Alessandra Vella, Michaela Luconi, Pamela Pinzani, Mario Pazzagli
The presence of circulating tumor cells (CTC) or microemboli (CTM) in the peripheral blood can theoretically anticipate malignancy of solid lesions in a variety of organs. We aimed to preliminarily assess this capability in patients with pulmonary lesions of suspected malignant nature. We used a cell-size filtration method (ScreenCell) and cytomorphometric criteria to detect CTC/CTM in a 3 mL sample of peripheral blood that was taken just before diagnostic percutaneous CT-guided fine needle aspiration (FNA) or core biopsy of the suspicious lung lesion...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819021/phenotypic-heterogeneity-of-circulating-tumor-cells-informs-clinical-decisions-between-ar-signaling-inhibitors-and-taxanes-in-metastatic-prostate-cancer
#19
Howard I Scher, Ryon P Graf, Nicole Schreiber, Brigit McLaughlin, Adam Jendrisak, Yipeng Wang, Jerry Lee, Stephanie Greene, Rachel Krupa, David Lu, Pascal Bamford, Jessica Louw, Lyndsey Dugan, Hebert Alberto Vargas, Martin Fleisher, Mark Landers, Glenn Heller, Ryan V Dittamore
The heterogeneity of an individual patient's tumor has been linked to treatment resistance, but quantitative biomarkers to rapidly and reproducibly evaluate heterogeneity in a clinical setting are currently lacking. Using established tools available in a CAP-accredited and CLIA-certified clinical laboratory, we quantified digital pathology features on 9,225 individual circulating tumor cells (CTCs) from 179 unique metastatic castration-resistant prostate cancer (mCRPC) patients to define phenotypically distinct cell types...
August 17, 2017: Cancer Research
https://www.readbyqxmd.com/read/28818355/ar-v7-in-peripheral-whole-blood-of-patients-with-castration-resistant-prostate-cancer-association-with-treatment-specific-outcome-under-abiraterone-and-enzalutamide
#20
Anna Katharina Seitz, Silvia Thoene, Andreas Bietenbeck, Roman Nawroth, Robert Tauber, Mark Thalgott, Sebastian Schmid, Ramona Secci, Margitta Retz, Jürgen E Gschwend, Jürgen Ruland, Christof Winter, Matthias M Heck
BACKGROUND: It has been demonstrated that androgen receptor splice variant 7 (AR-V7) expression in circulating tumor cells (CTCs) predicts poor treatment response in metastatic castration-resistant prostate cancer (mCRPC) patients treated with abiraterone or enzalutamide. OBJECTIVE: To develop a practical and robust liquid profiling approach for direct quantification of AR-V7 in peripheral whole blood without the need for CTC capture and to determine its potential for predicting treatment response in mCRPC patients...
August 14, 2017: European Urology
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