Download or read book Label Free Isolation and Molecular Analysis of Circulating Tumor Cells written by Manjima Dhar and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Circulating Tumor Cells (CTCs) are important biomarkers for monitoring tumor dynamics and efficacy of cancer therapy. When these cells disseminate from tumors and enter the blood stream, they carry the tumor's genetic and proteomic information. They are particularly attractive because they can be obtained in a minimally invasive manner. Using microfluidic devices, we can isolate these rare cells from the background of blood cells. Here we study clinically relevant use cases of these CTCs. We characterize two aspects of CTCs: i) the PD-L1 expression levels on CTCs from non-small cell lung cancer patients undergoing immunotherapy ii) the secretion of proteases as it relates to cancer metastasis. In the process of molecular profiling the CTCs, we use a novel label free Vortex isolation system. A modification to the original Vortex device enabled us to capture a wider size range of CTCs at a higher capture efficiency, uncovering further heterogeneity. This simple biophysical method opens doors for a range of downstream analysis. After CTC isolation, we test the hypothesis that tumor cells secrete proteolytic enzymes to facilitate tissue invasion and spread. Given recent work suggesting CTCs can be produced by early stage tumors, MMP production by CTCs could provide a more precise biomarker of the level of metastatic activity for the disease beyond a simple CTC count. We developed a unique integrated microfluidic system able to perform three functions: i) Isolate CTCs rapidly by size. ii) Exchange the fluid around CTCs to both remove contaminants, and introduce a fluorogenic MMP-substrate. iii) Encapsulate purified CTCs into a small number of microdroplets to interrogate MMPs secreted at the single-CTC level. Total analysis from blood input to secretion assay takes minutes and preserves viability, making this system compatible with studying live cells while they retain physiologic conditions. We found that isolated CTCs from metastatic prostate cancer patients, identified through surface markers and nucleus size, release active MMPs. Assaying protease activity of circulating tumor cells will ultimately be important in uncovering the biology of metastasis and serve as a key component of future phenotypic liquid biopsies, potentially enabling companion diagnostics for MMP inhibitor therapies currently in clinical trials.
Download or read book Isolation and Molecular Characterization of Circulating Tumor Cells written by Mark Jesus M. Magbanua and published by Springer. This book was released on 2017-05-29 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous studies have shown that elevated levels of circulating tumor cells (CTCs) in blood of cancer patients are associated with poor response to treatment and inferior survival probabilities. Despite this clinical significance, the molecular biology of CTCs remains poorly understood. The paucity in molecular information can be attributed to the tremendous technical challenges involved in isolating these extremely rare cells. Recent technological advancements in rare-cell technology, however, have allowed for the reliable enrichment and isolation of CTCs. Consequently, the use of recently developed molecular approaches —e.g., multiplexed QPCR, microarray, and next generation sequencing analyses— to profile CTCs have provided novel insights into the molecular makeup of these tumor cells. This book discusses approaches for enrichment and isolation of CTCs as well as recent advances in comprehensive molecular profiling of CTCs using cutting-edge omics technology.
Download or read book Circulating Tumor Cells written by Z. Hugh Fan and published by John Wiley & Sons. This book was released on 2016-04-18 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduces the reader to Circulating Tumor Cells (CTCs), their isolation method and analysis, and commercially available platforms Presents the historical perspective and the overview of the field of circulating tumor cells (CTCs) Discusses the state-of-art methods for CTC isolation, ranging from the macro- to micro-scale, from positive concentration to negative depletion, and from biological-property-enabled to physical-property-based approaches Details commercially available CTC platforms Describes post-isolation analysis and clinical translation Provides a glossary of scientific terms related to CTCs
Download or read book Minimal Residual Disease and Circulating Tumor Cells in Breast Cancer written by Michail Ignatiadis and published by Springer Science & Business Media. This book was released on 2012-04-23 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important book provides up-to-date information on a series of topical issues relating to the approach to minimal residual disease in breast cancer patients. It first explains how the study of minimal residual disease and circulating and disseminated tumor cells (CTCs/DTCs) can assist in the understanding of breast cancer metastasis. A series of chapters then discuss the various technologies available for the detection and characterization of CTCs and DTCs, pinpointing their merits and limitations. Detailed consideration is given to the relevance of CTCs and DTCs, and their detection, to clinical research and practice. The role of other blood-based biomarkers is also addressed, and the closing chapters debate the challenges facing drug and biomarker co-development and the use of CTCs for companion diagnostic development. This book will be of interest and assistance to all who are engaged in the modern management of breast cancer.
Download or read book Circulating Tumor Cells written by Richard J. Cote and published by Springer. This book was released on 2016-02-03 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides the latest research on circulating tumor cells aimed for cancer researchers, scientists, and molecular oncologists. It presents the basic concepts behind circulating tumor cells (CTCs), metastatic biology, and potential applications as to how CTCs can be used in diagnostic biomarkers. CTCs are cells that have detached from the primary tumor and circulate in the bloodstream. Such cells may become "seeds" for the growth of additional tumors. The field of analysis surrounding cancer metastasis has been steadily growing, and CTCs provide effective biomarkers that can be examined in peripheral blood through a minimally invasive “liquid biopsy” procedure. CTCs offer several exciting applications, not only as markers of disease progression but also as biomarkers of monitoring response to therapy and companion diagnostics for novel anticancer drug development. In recent years there has been rapid growth and worldwide developments on CTCs, which span both the basic sciences and biomedical engineering fields.
Download or read book Ex Vivo Engineering of the Tumor Microenvironment written by Amir R. Aref and published by Springer. This book was released on 2016-12-09 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume will outline how to recreate the tumor microenvironment, to culture primary tumors without the need for developmental priming factors, and to deliver targeted therapeutics in a manner that recapitulates pharmacokinetics in vivo. Much of what may be learned from this volume will aid in understanding many aspects of the enhanced study of tumor cell biology in a physiologic context, open new avenues for drug screening and biomarker development, and accelerate the preclinical evaluation of novel personalized medicine strategies for patients in real time.
Download or read book Holland Frei Cancer Medicine written by Robert C. Bast, Jr. and published by John Wiley & Sons. This book was released on 2017-03-10 with total page 2004 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holland-Frei Cancer Medicine, Ninth Edition, offers a balanced view of the most current knowledge of cancer science and clinical oncology practice. This all-new edition is the consummate reference source for medical oncologists, radiation oncologists, internists, surgical oncologists, and others who treat cancer patients. A translational perspective throughout, integrating cancer biology with cancer management providing an in depth understanding of the disease An emphasis on multidisciplinary, research-driven patient care to improve outcomes and optimal use of all appropriate therapies Cutting-edge coverage of personalized cancer care, including molecular diagnostics and therapeutics Concise, readable, clinically relevant text with algorithms, guidelines and insight into the use of both conventional and novel drugs Includes free access to the Wiley Digital Edition providing search across the book, the full reference list with web links, illustrations and photographs, and post-publication updates
Download or read book Automated Isolation of Circulating Tumor Cells and Their Molecular Biological Analysis written by Janis Hendrik Stiefel and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Circulating Tumor Cells written by Mark Jesus M. Magbanua and published by . This book was released on 2017 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores various approaches for enrichment, detection, isolation, and molecular profiling of circulating tumor cells (CTCs). Each chapter provides comprehensive descriptions and guidelines on how to perform innovative experiments in CTC research. Included are protocols for capture of CTCs via filtration and density gradient centrifugation; microfluidic and immunomagnetic separation of CTCs; detection of CTCs by immunocytochemistry, fluorescence in situ hybridization, and flow cytometry; assays designed for genomic characterization and functional analyses of CTCs, and many more. Written in the highly successful Methods in Molecular Biology series format, the chapters in this book include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Cutting-edge and authoritative, Circula ting Tumor Cells: Methods and Protocols is a valuable resource for laboratory researchers and clinicians who are interested in furthering their studies on CTCs.
Download or read book Unmasking Circulating Tumor Cells written by Joost Franciscus Swennenhuis and published by . This book was released on 2017 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Biopsies in Solid Tumors written by Massimo Cristofanilli and published by Humana Press. This book was released on 2017-03-25 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, with chapters written by experts in the field of cancerous tumors, details the key factors associated with liquid biopsies in solid tumors: blood-based diagnostics; circulating tumor cells; enumeration and molecular analysis (association with breast cancer); epithelialmesenchymal transition; detection and monitoring; circulating-free tumor DNA; CTCs and ctDNA; and the exosome. The field of blood-based diagnostics is rapidly evolving demonstrating the possibility of real-time molecular analysis of cancer cells and their phenotype and genotype. Circulating Tumor Cell (CTCs) have demonstrated prognostic and predictive value in advanced cancer and represents a source of tumor cells for transcriptome and genomic analysis. Most recently, the detection of genomic abnormalities in the peripheral blood by sensitive and selective PCR methods (liquid biopsy) opened to the option of a comprehensive blood-based tumor analysis. Similar information can be obtained by analysis of exosome, a natural packaging and messaging system being explored in advanced malignancies. The final frontier is the evaluation of immune cells determinant of innate and adaptive immunity.
Download or read book Tumor Organoids written by Shay Soker and published by Humana Press. This book was released on 2017-10-20 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cancer cell biology research in general, and anti-cancer drug development specifically, still relies on standard cell culture techniques that place the cells in an unnatural environment. As a consequence, growing tumor cells in plastic dishes places a selective pressure that substantially alters their original molecular and phenotypic properties.The emerging field of regenerative medicine has developed bioengineered tissue platforms that can better mimic the structure and cellular heterogeneity of in vivo tissue, and are suitable for tumor bioengineering research. Microengineering technologies have resulted in advanced methods for creating and culturing 3-D human tissue. By encapsulating the respective cell type or combining several cell types to form tissues, these model organs can be viable for longer periods of time and are cultured to develop functional properties similar to native tissues. This approach recapitulates the dynamic role of cell–cell, cell–ECM, and mechanical interactions inside the tumor. Further incorporation of cells representative of the tumor stroma, such as endothelial cells (EC) and tumor fibroblasts, can mimic the in vivo tumor microenvironment. Collectively, bioengineered tumors create an important resource for the in vitro study of tumor growth in 3D including tumor biomechanics and the effects of anti-cancer drugs on 3D tumor tissue. These technologies have the potential to overcome current limitations to genetic and histological tumor classification and development of personalized therapies.
Download or read book Molecular Medicine written by Sinem Nalbantoglu and published by BoD – Books on Demand. This book was released on 2019-11-06 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular medicine is an applied science focused on human genes/transcripts, proteins, metabolites, and metabolic networks that describes molecular and cellular processes of health and disease onset and progression. Molecular medicine-based integrative identification and characterization of biomarker targets and their clinical translations is essential to explain/decipher the mechanism(s) underlying physiological pathways and pathological conditions, and acquire cell-targeted early interventional and therapeutic strategies in the context of precision medicine and public health. Principally, Molecular Medicine provides an overview of the latest headlines/developments of systems and molecular medicine, highlighting the emerging high-throughput technologies, promising potential applications, and progress in biomedical research and development strategies.
Download or read book Quantitative Phase Imaging of Cells and Tissues written by Gabriel Popescu and published by McGraw Hill Professional. This book was released on 2011-03-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cutting-edge quantitative phase imaging techniques and their applications Filled with unique, full-color images taken by advanced quantitative phase imaging (QPI), Quantitative Phase Imaging of Cells and Tissues thoroughly explores this innovative technology and its biomedical applications. An introductory background on optical imaging and traditional optical microscopy is included to illustrate concept development. The book explains how various visualization modalities can be obtained by numerical calculations. This authoritative resource reveals how to take full advantage of the unprecedented capabilities of QPI, such as rendering scattering properties of minute subcellular structures and nanoscale fluctuations in live cells. Coverage includes: Groundwork Spatiotemporal field correlations Image characteristics Light microscopy Holography Point scanning QPI methods Principles of full-field QPI Off-axis full-field methods Phase-shifting techniques Common-path methods White light techniques Fourier transform light scattering (FTLS) Current trends in QPI
Download or read book Translational Nanomedicine written by Robert A. Meyers and published by Wiley-Blackwell. This book was released on 2020-03-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The largest high-level encyclopedia on molecular medicine is now publishing a topical volume on Nanomedicine. The long awaited volume gives a comprehensive overview on nanomaterials in drug delivery, imaging and as therapeutics.
Download or read book Sensitive and High throughput Detection Separation and Analysis of Circulating Tumor Cells written by Mengxia Zhao and published by . This book was released on 2013 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes novel methods to detect, separate and analyze circulating tumor cells (CTCs) from peripheral blood, with a high sensitivity and throughput. The ensemble-decision aliquot ranking (eDAR) platform is a new method for isolating CTCs from cancer patients with a recovery ratio of 93% and a zero false positive rate. We have validated this method by analyzing the samples from breast, pancreatic and lung cancer patients. The capability to perform downstream analyses on the isolated CTCs were also tested and integrated into the eDAR platform. We developed a method that can monitor eight protein markers, using a sequential staining and photobleaching procedure. Single-cell isolation and culture of the trapped CTCs were also tested. Based on these, we re-designed the eDAR platform by applying a new active cell sorting scheme and a new further purification method. Because many applications in the CTC area are focused on the enumeration, we also developed an automated method for counting tumor cells in whole blood samples. This enumeration method was validated by a side-by-side comparison with CellSearch, the only FDA approved method at present, in 90 metastatic breast cancer patient samples. These tools facilitate fundamental investigation of rare cells, as well as developing non-invasive biopsy to improve the clinical treatment.
Download or read book Antibody free Isolation of Circulating Tumor Cells by Dielectrophoretic Field low Fractionation written by Sangjo Shim and published by . This book was released on 2013 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work focuses on the integration of microfluidics and dielectrophoresis(DEP) with the principles of field flow fractionation (FFF) to create a continuous-flow isolator for rare and viable circulating tumor cells (CTCs) from peripheral blood mononuclear cells (PBMNs) drawn from cancer patients. The method exploits differences in the plasma membrane capacitances of tumor and blood cells, which correspond to differences in the membrane surface areas of these cell types. DEP-FFF was first adapted to measure cell membrane capacitance, cell density and deformability profiles of cell populations. These properties of the NCI-60 panel of cancer cell types, which represents the wide functional diversity of cancers from 9 organs and leukemia, were compared with the normal cell subpopulations of peripheral blood. In every case, the NCI-60 cells exhibited membrane capacitance characteristics that were distinct from blood and, as a result, they could be isolated from blood by DEP. The heightened cancer cell membrane capacitances correlated strongly with membrane-rich morphological characteristics at their growth sites, including cell flattening, dendritic projections, and surface wrinkling. Following harvest from culture and maintenance in suspension, cancer cells were found to shed cytoplasm and membrane area over time and the suspended cell populations developed considerable morphological diversity. The shedding changed the cancer cell DEP properties but they could still be isolated from blood cells. A similar shedding process in the peripheral blood could account for the surprisingly wide morphological diversity seen among circulating cells isolated from clinical specimens. A continuous flow DEP-FFF method was devised to exploit these findings by allowing CTCs to be isolated from the nucleated cells of 10 mL clinical blood specimens in 40 minutes, an extremely high throughput rate for a microfluidic-based method. Cultured cancer cells could be isolated at 70-80% efficiency using this approach and the isolation of CTCs from clinical specimens was demonstrated. The results showed that the continuous DEP-FFF method delivers unmodified, viable CTCs for analysis, is perhaps universally applicable to isolation of CTCs from different cancer types and is independent of surface antigens - making it suitable for cells lacking the epithelial markers used in currently accepted CTC isolation methods.
