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Roosan MR, Mambetsariev I, Pharaon R, Fricke J, Husain H, Reckamp KL, Koczywas M, Massarelli E, Bild AH, Salgia R. Usefulness of Circulating Tumor DNA in Identifying Somatic Mutations and Tracking Tumor Evolution in Patients With Non-small Cell Lung Cancer. Chest 2021; 160:1095-1107. [PMID: 33878340 PMCID: PMC8449001 DOI: 10.1016/j.chest.2021.04.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 03/21/2021] [Accepted: 04/01/2021] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The usefulness of circulating tumor DNA (ctDNA) in detecting mutations and monitoring treatment response has not been well studied beyond a few actionable biomarkers in non-small cell lung cancer (NSCLC). RESEARCH QUESTION How does the usefulness of ctDNA analysis compare with that of solid tumor biopsy analysis in patients with NSCLC? METHODS We retrospectively evaluated 370 adult patients with NSCLC treated at the City of Hope between November 2015 and August 2019 to assess the usefulness of ctDNA in mutation identification, survival, concordance with matched tissue samples in 32 genes, and tumor evolution. RESULTS A total of 1,688 somatic mutations were detected in 473 ctDNA samples from 370 patients with NSCLC. Of the 473 samples, 177 showed at least one actionable mutation with currently available Food and Drug Administration-approved NSCLC therapies. MET and CDK6 amplifications co-occurred with BRAF amplifications (false discovery rate [FDR], < 0.01), and gene-level mutations were mutually exclusive in KRAS and EGFR (FDR, 0.0009). Low cumulative percent ctDNA levels were associated with longer progression-free survival (hazard ratio [HR], 0.56; 95% CI, 0.37-0.85; P = .006). Overall survival was shorter in patients harboring BRAF mutations (HR, 2.35; 95% CI, 1.24-4.6; P = .009), PIK3CA mutations (HR, 2.77; 95% CI, 1.56-4.9; P < .001) and KRAS mutations (HR, 2.32; 95% CI, 1.30-4.1; P = .004). Gene-level concordance was 93.8%, whereas the positive concordance rate was 41.6%. More mutations in targetable genes were found in ctDNA than in tissue biopsy samples. Treatment response and tumor evolution over time were detected in repeated ctDNA samples. INTERPRETATION Although ctDNA analysis exhibited similar usefulness to tissue biopsy analysis, more mutations in targetable genes were missed in tissue biopsy analyses. Therefore, the evaluation of ctDNA in conjunction with tissue biopsy samples may help to detect additional targetable mutations to improve clinical outcomes in advanced NSCLC.
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Affiliation(s)
| | | | | | - Jeremy Fricke
- City of Hope Comprehensive Cancer Center, Duarte, CA
| | - Hatim Husain
- UC San Diego Health Moores Cancer Center, La Jolla, CA
| | - Karen L Reckamp
- City of Hope Comprehensive Cancer Center, Duarte, CA; Division of Medical Oncology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA
| | | | | | - Andrea H Bild
- Division of Molecular Pharmacology, Department of Medical Oncology and Therapeutics Research, City of Hope, Duarte, CA
| | - Ravi Salgia
- City of Hope Comprehensive Cancer Center, Duarte, CA.
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2
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Li Z, Shu J, Yang B, Zhang Z, Huang J, Chen Y. Emerging non-invasive detection methodologies for lung cancer. Oncol Lett 2020; 19:3389-3399. [PMID: 32269611 PMCID: PMC7115116 DOI: 10.3892/ol.2020.11460] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 01/17/2020] [Indexed: 12/24/2022] Open
Abstract
The potential for non-invasive lung cancer (LC) diagnosis based on molecular, cellular and volatile biomarkers has been attracting increasing attention, with the development of advanced techniques and methodologies. It is standard practice to tailor the treatments of LC for certain specific genetic alterations, including the epidermal growth factor receptor, anaplastic lymphoma kinase and BRAF genes. Despite these advances, little is known about the internal mechanisms of different types of biomarkers and the involvement of their related biochemical pathways during the development of LC. The development of faster and more effective techniques is essential for the identification of different biomarkers. The present review summarizes some of the latest methods used for detecting molecular, cellular and volatile biomarkers in LC and their potential use in clinical diagnosis and targeted therapy.
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Affiliation(s)
- Zhen Li
- Beijing Advanced Sciences and Innovation Center, Chinese Academy of Sciences, Beijing 101407, P.R. China.,National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Jinian Shu
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Bo Yang
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Zuojian Zhang
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Jingyun Huang
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, P.R. China
| | - Yang Chen
- Beijing Advanced Sciences and Innovation Center, Chinese Academy of Sciences, Beijing 101407, P.R. China
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3
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Zhang Y, Zheng H, Zhan Y, Long M, Liu S, Lu J, Zang H, Fan S. Detection and application of circulating tumor cell and circulating tumor DNA in the non-small cell lung cancer. Am J Cancer Res 2018; 8:2377-2386. [PMID: 30662798 PMCID: PMC6325475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) is the leading cause of cancer-related death in both men and women. The ability of cancer cells to break-off from the primary tumor and spread to distant organs is the main cause of death of cancer patients. The detection of circulating tumor cells (CTCs) and circulating tumor DNA (ctDNA) is a considerable part of liquid biopsy, which contributes to the diagnosis, treatment and prognosis, and especially to identify the targetable mutations of NSCLC. This review is to discuss the detection and application of CTC and ctDNA in the diagnosis, prognostic evaluation and guiding targeted therapy of NSCLC.
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Affiliation(s)
- Yuting Zhang
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Hongmei Zheng
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Yuting Zhan
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Mengping Long
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Sile Liu
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Junmi Lu
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Hongjing Zang
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Songqing Fan
- Department of Pathology, The Second Xiangya Hospital, Central South University Changsha, Hunan, China
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4
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Fassan M. Molecular Diagnostics in Pathology: Time for a Next-Generation Pathologist? Arch Pathol Lab Med 2018; 142:313-320. [DOI: 10.5858/arpa.2017-0269-ra] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Abstract
Context.—Comprehensive molecular investigations of mainstream carcinogenic processes have led to the use of effective molecular targeted agents in most cases of solid tumors in clinical settings.Objective.—To update readers regarding the evolving role of the pathologist in the therapeutic decision-making process and the introduction of next-generation technologies into pathology practice.Data Sources.—Current literature on the topic, primarily sourced from the PubMed (National Center for Biotechnology Information, Bethesda, Maryland) database, were reviewed.Conclusions.—Adequate evaluation of cytologic-based and tissue-based predictive diagnostic biomarkers largely depends on both proper pathologic characterization and customized processing of biospecimens. Moreover, increased requests for molecular testing have paralleled the recent, sharp decrease in tumor material to be analyzed—material that currently comprises cytology specimens or, at minimum, small biopsies in most cases of metastatic/advanced disease. Traditional diagnostic pathology has been completely revolutionized by the introduction of next-generation technologies, which provide multigene, targeted mutational profiling, even in the most complex of clinical cases. Combining traditional and molecular knowledge, pathologists integrate the morphological, clinical, and molecular dimensions of a disease, leading to a proper diagnosis and, therefore, the most-appropriate tailored therapy.
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Affiliation(s)
- Matteo Fassan
- From the Department of Medicine, Surgical Pathology and Cytopathology Unit, University of Padua, Padua, Italy
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5
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Mahesh PA. Molecular biology tools for precision medicine in managing lung cancer. Lung India 2018; 35:1-3. [PMID: 29319025 PMCID: PMC5760860 DOI: 10.4103/lungindia.lungindia_470_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- P A Mahesh
- Department of Pulmonary Medicine, JSS Medical College, JSS University, Mysore, Karnataka, India
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6
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Goto T, Hirotsu Y, Amemiya K, Nakagomi T, Shikata D, Yokoyama Y, Okimoto K, Oyama T, Mochizuki H, Omata M. Distribution of circulating tumor DNA in lung cancer: analysis of the primary lung and bone marrow along with the pulmonary venous and peripheral blood. Oncotarget 2017; 8:59268-59281. [PMID: 28938635 PMCID: PMC5601731 DOI: 10.18632/oncotarget.19538] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 06/02/2017] [Indexed: 12/14/2022] Open
Abstract
Circulating tumor DNA (ctDNA), extracted from plasma, is a non-invasive surrogate biomarker. However, the distribution of ctDNA in the body still remains to be elucidated. In this study, resected lung tumors, with simultaneous blood and bone marrow samples, were analyzed to elucidate the distribution of ctDNA. Rib bone marrow, pulmonary venous blood (Pul.V) and peripheral blood (Peri.B) were obtained from 30 patients. The liquid samples were divided into cell pellets and supernatant by centrifugation; a total of 212 DNA samples were subjected to massively parallel sequencing. ctDNA was detected in 5 patients. Given that the frequency of mutations in the primary tumor was considered to be 100%, those in the other specimens were as follows; Pul.V plasma 20%, Peri.B plasma 11%, and the other samples 0%. Furthermore, ctDNA reflected the predominant mutations in the primary lesion. Clinically, the presence of ctDNA was associated with significantly poorer survival. These results suggest ctDNA “spill over” into an immediate outflow tract (Pul.V), and from there is disseminated to the entire body. Thus, it can be inferred that ctDNA reflects the cancer progression and could function as a prognostic marker.
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Affiliation(s)
- Taichiro Goto
- Lung Cancer and Respiratory Disease Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Yosuke Hirotsu
- Genome Analysis Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Kenji Amemiya
- Genome Analysis Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Takahiro Nakagomi
- Lung Cancer and Respiratory Disease Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Daichi Shikata
- Lung Cancer and Respiratory Disease Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Yujiro Yokoyama
- Lung Cancer and Respiratory Disease Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Kenichiro Okimoto
- Genome Analysis Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Toshio Oyama
- Department of Pathology, Yamanashi Central Hospital, Yamanashi, Japan
| | - Hitoshi Mochizuki
- Genome Analysis Center, Yamanashi Central Hospital, Yamanashi, Japan
| | - Masao Omata
- Genome Analysis Center, Yamanashi Central Hospital, Yamanashi, Japan.,University of Tokyo, Tokyo, Japan
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7
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Tan WL, Jain A, Takano A, Newell EW, Iyer NG, Lim WT, Tan EH, Zhai W, Hillmer AM, Tam WL, Tan DSW. Novel therapeutic targets on the horizon for lung cancer. Lancet Oncol 2017; 17:e347-e362. [PMID: 27511159 DOI: 10.1016/s1470-2045(16)30123-1] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 04/27/2016] [Accepted: 04/28/2016] [Indexed: 02/08/2023]
Abstract
Lung cancer is a leading cause of cancer-related mortality worldwide, and is classically divided into two major histological subtypes: non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC). Although NSCLC and SCLC are considered distinct entities with different genomic landscapes, emerging evidence highlights a convergence in therapeutically relevant targets for both histologies. In adenocarcinomas with defined alterations such as EGFR mutations and ALK translocations, targeted therapies are now first-line standard of care. By contrast, many experimental and targeted agents remain largely unsuccessful for SCLC. Intense preclinical research and clinical trials are underway to exploit unique traits of lung cancer, such as oncogene dependency, DNA damage response, angiogenesis, and cellular plasticity arising from presence of cancer stem cell lineages. In addition, the promising clinical activity observed in NSCLC in response to immune checkpoint blockade has spurred great interest in the field of immunooncology, with the scope to develop a diverse repertoire of synergistic and personalised immunotherapeutics. In this Review, we discuss novel therapeutic agents for lung cancer that are in early-stage development, and how prospective clinical trials and drug development may be shaped by a deeper understanding of this heterogeneous disease.
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Affiliation(s)
- Wan-Ling Tan
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore; Cancer Therapeutics Research Laboratory, National Cancer Centre Singapore, Singapore
| | - Amit Jain
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Angela Takano
- Department of Pathology, Singapore General Hospital, Singapore
| | | | - N Gopalakrishna Iyer
- Cancer Therapeutics Research Laboratory, National Cancer Centre Singapore, Singapore
| | - Wan-Teck Lim
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore; Institute of Molecular and Cell Biology, A*STAR, Singapore; Duke-National University of Singapore Medical School, Singapore
| | - Eng-Huat Tan
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Weiwei Zhai
- Genome Institute of Singapore, A*STAR, Singapore
| | | | - Wai-Leong Tam
- Genome Institute of Singapore, A*STAR, Singapore; Cancer Science Institute of Singapore, National University of Singapore, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Daniel S W Tan
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore; Cancer Therapeutics Research Laboratory, National Cancer Centre Singapore, Singapore; Genome Institute of Singapore, A*STAR, Singapore.
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8
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Zugazagoitia J, Molina-Pinelo S, Lopez-Rios F, Paz-Ares L. Biological therapies in nonsmall cell lung cancer. Eur Respir J 2017; 49:49/3/1601520. [PMID: 28254765 DOI: 10.1183/13993003.01520-2016] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/28/2016] [Indexed: 11/05/2022]
Abstract
Biological therapies have improved survival outcomes of advanced-stage nonsmall cell lung cancer (NSCLC). Genotype-directed therapies have changed treatment paradigms of patients with EGFR-mutant and ALK/ROS1-rearranged lung adenocarcinomas, and the list of druggable targets with demonstrated clinical actionability (BRAF, MET, RET, NTRK1 and HER2) continues to expand. Furthermore, we have incrementally understood the mechanisms of cancer immune evasion and foresee ways to effectively circumvent them, particularly at the immune checkpoint level. Drugs targeting the tumour immune-evasive PD-1 pathway have demonstrated remarkable treatment benefits in this disease, with a non-negligible fraction of patients potentially receiving long-term survival benefits. Herein, we briefly discuss the role of various medical disciplines in the management of advanced-stage NSCLC and review the most relevant biological therapies for this disease, with particular emphasis in genotype-directed therapies and immune checkpoint inhibitors.
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Affiliation(s)
- Jon Zugazagoitia
- Medical Oncology Dept, Hospital Universitario 12 de Octubre and Instituto de Investigación i+12, Madrid, Spain.,Lung Cancer Group, Clinical Research Program, CNIO (Centro Nacional de Investigaciones Oncológicas), Madrid, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain.,These authors contributed equally to this work
| | - Sonia Molina-Pinelo
- Medical Oncology Dept, Hospital Universitario 12 de Octubre and Instituto de Investigación i+12, Madrid, Spain.,Lung Cancer Group, Clinical Research Program, CNIO (Centro Nacional de Investigaciones Oncológicas), Madrid, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain.,These authors contributed equally to this work
| | - Fernando Lopez-Rios
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain.,Laboratorio de Dianas Terapéuticas, Hospital Universitario HM Sanchinarro, Madrid, Spain
| | - Luis Paz-Ares
- Medical Oncology Dept, Hospital Universitario 12 de Octubre and Instituto de Investigación i+12, Madrid, Spain .,Lung Cancer Group, Clinical Research Program, CNIO (Centro Nacional de Investigaciones Oncológicas), Madrid, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Spain.,Complutense University, Madrid, Spain
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9
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Perakis S, Auer M, Belic J, Heitzer E. Advances in Circulating Tumor DNA Analysis. Adv Clin Chem 2017; 80:73-153. [PMID: 28431643 DOI: 10.1016/bs.acc.2016.11.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The analysis of cell-free circulating tumor DNA (ctDNA) is a very promising tool and might revolutionize cancer care with respect to early detection, identification of minimal residual disease, assessment of treatment response, and monitoring tumor evolution. ctDNA analysis, often referred to as "liquid biopsy" offers what tissue biopsies cannot-a continuous monitoring of tumor-specific changes during the entire course of the disease. Owing to technological improvements, efforts for the establishment of preanalytical and analytical benchmark, and the inclusion of ctDNA analyses in clinical trial, an actual clinical implementation has come within easy reach. In this chapter, recent advances of the analysis of ctDNA are summarized starting from the discovery of cell-free DNA, to methodological approaches and the clinical applicability.
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Affiliation(s)
- Samantha Perakis
- Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Martina Auer
- Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Jelena Belic
- Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Ellen Heitzer
- Institute of Human Genetics, Medical University of Graz, Graz, Austria.
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10
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Pathologists and liquid biopsies: to be or not to be? Virchows Arch 2016; 469:601-609. [PMID: 27553354 DOI: 10.1007/s00428-016-2004-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 06/25/2016] [Accepted: 08/09/2016] [Indexed: 12/19/2022]
Abstract
Recently, the advent of therapies targeting genomic alterations has improved the care of patients with certain types of cancer. While molecular targets were initially detected in nucleic acid samples extracted from tumor tissue, detection of nucleic acids in circulating blood has allowed the development of what has become known as liquid biopsies, which provide a complementary and alternative sample source allowing identification of genomic alterations that might be addressed by targeted therapy. Consequently, liquid biopsies might rapidly revolutionize oncology practice in allowing administration of more effective treatments. Liquid biopsies also provide an approach towards short-term monitoring of metastatic cancer patients to evaluate efficacy of treatment and/or early detection of secondary mutations responsible for resistance to treatment. In this context, pathologists, who have already been required in recent years to take interest in the domain of molecular pathology of cancer, now face new challenges. The attitude of pathologists to and level of involvement in the practice of liquid biopsies, including mastering the methods employed in molecular analysis of blood samples, need close attention. Regardless of the level of involvement of pathologists in this new field, it is mandatory that oncologists, biologists, geneticists, and pathologists work together to coordinate the pre-analytical, analytical, and post-analytical phases of molecular assessment of tissue and liquid samples of individual cancer patients. The challenges include (1) implementation of effective and efficient procedures for reception and analysis of liquid and tissue samples for histopathological and molecular evaluation and (2) assuring short turn-around times to facilitate rapid optimization of individual patient treatment. In this paper, we will review the following: (1) recent data concerning the concept of liquid biopsies in oncology and its development for patient care, (2) advantages and limitations of molecular analyses performed on blood samples compared to those performed on tissue samples, and (3) short-term challenges facing pathologists in dealing with liquid biopsies of cancer patients and new strategies to early detect metastatic tumor cell clones.
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Neueste technologische Entwicklungen für die Analyse von zirkulierender Tumor-DNA. MED GENET-BERLIN 2016. [DOI: 10.1007/s11825-016-0089-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Zusammenfassung
Die Analyse von zirkulierender Tumor-DNA, zusammen mit der Analyse von zirkulierenden Tumorzellen auch oft Liquid Biopsy genannt, ist ein sich rasch entwickelndes Feld in der medizinischen Forschung. Obwohl es von der Entdeckung der zellfreien DNA bis hin zur Erkenntnis, dass sie sich als Biomarker eignet, Jahrzehnte gedauert hat, wurde der klinische Nutzen der ctDNA hinsichtlich der Überwachung des Therapieansprechens, der Identifizierung von Resistenzmechanismen und neu aufkommenden Therapiezielen sowie der Detektion von minimaler Resterkrankung mittlerweile in unzähligen Studien bewiesen.
Aufgrund der hohen Variabilität, mit der ctDNA in der Zirkulation vorkommt, sowie der starken Fragmentierung, stellt die ctDNA aber einen schwierigen Analyten dar. In den letzten Jahren haben erhebliche technologische Fortschritte dazu beigetragen, dass eine Routineanwendung der ctDNA-Analysen tatsächlich realisierbar wird, sofern eine Reihe von regulatorischen Hürden überwunden wird.
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Biosensors for liquid biopsy: circulating nucleic acids to diagnose and treat cancer. Anal Bioanal Chem 2016; 408:7255-64. [PMID: 27497966 DOI: 10.1007/s00216-016-9806-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/05/2016] [Accepted: 07/18/2016] [Indexed: 01/05/2023]
Abstract
The detection of cancer biomarkers freely circulating in blood offers new opportunities for cancer early diagnosis, patient follow-up, and therapy efficacy assessment based on liquid biopsy. In particular, circulating cell-free nucleic acids released from tumor cells have recently attracted great attention also because they become detectable in blood before the appearance of other circulating biomarkers, such as circulating tumor cells. The detection of circulating nucleic acids poses several technical challenges that arise from their low concentration and relatively small size. Here, possibilities offered by innovative biosensing approaches for the detection of circulating DNA in peripheral blood and blood-derived products such as plasma and serum blood are discussed. Different transduction principles are used to detect circulating DNAs and great advantages are derived from the combined use of nanostructured materials.
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