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Zavarykina TM, Lomskova PK, Pronina IV, Khokhlova SV, Stenina MB, Sukhikh GT. Circulating Tumor DNA Is a Variant of Liquid Biopsy with Predictive and Prognostic Clinical Value in Breast Cancer Patients. Int J Mol Sci 2023; 24:17073. [PMID: 38069396 PMCID: PMC10706922 DOI: 10.3390/ijms242317073] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
This paper introduces the reader to the field of liquid biopsies and cell-free nucleic acids, focusing on circulating tumor DNA (ctDNA) in breast cancer (BC). BC is the most common type of cancer in women, and progress with regard to treatment has been made in recent years. Despite this, there remain a number of unresolved issues in the treatment of BC; in particular, early detection and diagnosis, reliable markers of response to treatment and for the prediction of recurrence and metastasis, especially for unfavorable subtypes, are needed. It is also important to identify biomarkers for the assessment of drug resistance and for disease monitoring. Our work is devoted to ctDNA, which may be such a marker. Here, we describe its main characteristics and potential applications in clinical oncology. This review considers the results of studies devoted to the analysis of the prognostic and predictive roles of various methods for the determination of ctDNA in BC patients. Currently known epigenetic changes in ctDNA with clinical significance are reviewed. The possibility of using ctDNA as a predictive and prognostic marker for monitoring BC and predicting the recurrence and metastasis of cancer is also discussed, which may become an important part of a precision approach to the treatment of BC.
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Affiliation(s)
- Tatiana M. Zavarykina
- N.M. Emanuel Institute of Biochemical Physics of the Russian Academy of Sciences, Moscow 119334, Russia;
- “B.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology of Ministry of Health of the Russian Federation, Moscow 117997, Russia; (S.V.K.); (G.T.S.)
| | - Polina K. Lomskova
- N.M. Emanuel Institute of Biochemical Physics of the Russian Academy of Sciences, Moscow 119334, Russia;
| | - Irina V. Pronina
- Institute of General Pathology and Pathophysiology, Moscow 125315, Russia;
| | - Svetlana V. Khokhlova
- “B.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology of Ministry of Health of the Russian Federation, Moscow 117997, Russia; (S.V.K.); (G.T.S.)
| | - Marina B. Stenina
- “N.N. Blokhin National Medical Research Center of Oncology of Ministry of Health of the Russian Federation, Moscow 115522, Russia;
| | - Gennady T. Sukhikh
- “B.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology of Ministry of Health of the Russian Federation, Moscow 117997, Russia; (S.V.K.); (G.T.S.)
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Silvoniemi A, Laine J, Aro K, Nissi L, Bäck L, Schildt J, Hirvonen J, Hagström J, Irjala H, Aaltonen LM, Seppänen M, Minn H. Circulating Tumor DNA in Head and Neck Squamous Cell Carcinoma: Association with Metabolic Tumor Burden Determined with FDG-PET/CT. Cancers (Basel) 2023; 15:3970. [PMID: 37568786 PMCID: PMC10416934 DOI: 10.3390/cancers15153970] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/28/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
BACKGROUND The detection of circulating tumor DNA (ctDNA) with next-generation sequencing (NGS) in venous blood is a promising tool for the genomic profiling of head and neck squamous cell carcinoma (HNSCC). The association between ctDNA findings and metabolic tumor burden detected with FDG-PET/CT imaging is of particular interest for developing prognostic and predictive algorithms in HNSCC. METHODS Twenty-six prospectively enrolled HNSCC patients were eligible for further analysis. All patients underwent tumor tissue and venous liquid biopsy sampling and FDG-PET/CT before definitive oncologic treatment. An NGS-based commercial panel was used for a genomic analysis of the samples. RESULTS Maximum variant allele frequency (VAF) in blood correlated positively with whole-body (WB) metabolic tumor volume (MTV) and total lesion glycolysis (TLG) (r = 0.510, p = 0.008 and r = 0.584, p = 0.002, respectively). A positive liquid biopsy was associated with high WB-TLG using VAF ≥ 1.00% or ≥5.00% as a cut-off value (p = 0.006 or p = 0.003, respectively). Additionally, ctDNA detection was associated with WB-TLG when only concordant variants detected in both ctDNA and tissue samples were considered. CONCLUSIONS A high metabolic tumor burden based on FDG imaging is associated with a positive liquid biopsy and high maximum VAF. Our findings suggest a complementary role of metabolic and genomic signatures in the pre-treatment evaluation of HNSCC.
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Affiliation(s)
- Antti Silvoniemi
- Department of Otorhinolaryngology—Head and Neck Surgery, Turku University Hospital, University of Turku, FI-20521 Turku, Finland
- Turku PET Centre, University of Turku, FI-20521 Turku, Finland
| | - Jukka Laine
- Department of Pathology, Turku University Hospital, University of Turku, FI-20520 Turku, Finland
| | - Katri Aro
- Department of Otorhinolaryngology—Head and Neck Surgery, Helsinki University Hospital, University of Helsinki, FI-00029 Helsinki, Finland
| | - Linda Nissi
- Department of Oncology, Turku University Hospital, University of Turku, FI-20521 Turku, Finland
| | - Leif Bäck
- Department of Otorhinolaryngology—Head and Neck Surgery, Helsinki University Hospital, University of Helsinki, FI-00029 Helsinki, Finland
| | - Jukka Schildt
- Department of Nuclear Medicine, HUS Diagnostic Center, Helsinki University Hospital, University of Helsinki, FI-00029 Helsinki, Finland
| | - Jussi Hirvonen
- Department of Radiology, Turku University Hospital, University of Turku, FI-20521 Turku, Finland
- Department of Radiology, Faculty of Medicine and Health Technology, Tampere University Hospital, Tampere University, FI-33520 Tampere, Finland
| | - Jaana Hagström
- Department of Oral Pathology and Radiology, University of Turku, FI-20520 Turku, Finland
- Department of Pathology, Helsinki University Hospital, Helsinki University, FI-00290 Helsinki, Finland
| | - Heikki Irjala
- Department of Otorhinolaryngology—Head and Neck Surgery, Turku University Hospital, University of Turku, FI-20521 Turku, Finland
| | - Leena-Maija Aaltonen
- Department of Otorhinolaryngology—Head and Neck Surgery, Helsinki University Hospital, University of Helsinki, FI-00029 Helsinki, Finland
| | - Marko Seppänen
- Turku PET Centre, University of Turku, FI-20521 Turku, Finland
- Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital, University of Turku, FI-20521 Turku, Finland
| | - Heikki Minn
- Turku PET Centre, University of Turku, FI-20521 Turku, Finland
- Department of Oncology, Turku University Hospital, University of Turku, FI-20521 Turku, Finland
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Hsiehchen D, Bucheit L, Yang D, Beg MS, Lim M, Lee SS, Kasi PM, Kaseb AO, Zhu H. Genetic features and therapeutic relevance of emergent circulating tumor DNA alterations in refractory non-colorectal gastrointestinal cancers. Nat Commun 2022; 13:7477. [PMID: 36463294 PMCID: PMC9719461 DOI: 10.1038/s41467-022-35144-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 11/17/2022] [Indexed: 12/05/2022] Open
Abstract
Acquired resistance to systemic treatments is inevitable in most cancers, but the genetic basis for this in many cancer types has remained elusive due to constraints in obtaining tissue specimens longitudinally. In the management of gastrointestinal cancers, molecular profiling is conventionally performed at a single time point, although serial evaluations may yield biological insights that inform treatment decisions. We characterize genetic changes in serial liquid biopsies which provide real-time snapshots of tumor genetics and heterogeneity in refractory non-colorectal gastrointestinal cancers, and determine the clinical utility of repeat circulating tumor DNA (ctDNA) testing. In a national cohort of 449 patients with pancreatic, biliary, esophagogastric, and hepatocellular cancers, resistance to conventional therapies is broadly associated with tumor evolution. Emergent ctDNA alterations only detectable at progression occurs in 63% of patients and are frequently associated with treatment actionability. Tumor mutation burden is dynamic in cancers undergoing treatment, but is not associated with time to progression. Objective tumor responses in a case series of patients receiving treatment matched to emergent alterations show that repeat liquid biopsies may have clinical benefit by expanding treatment options in advanced gastrointestinal cancers.
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Affiliation(s)
- David Hsiehchen
- Division of Hematology and Oncology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | | | - Dong Yang
- Guardant Health Inc, Redwood City, CA, USA
| | - Muhammad Shaalan Beg
- Division of Hematology and Oncology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Mir Lim
- Division of Hematology and Oncology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Sunyoung S Lee
- Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Pashtoon Murtaza Kasi
- Weill Cornell Medicine, Englander Institute of Precision Medicine, Meyer Cancer Center, New York, NY, USA
| | - Ahmed O Kaseb
- Department of Gastrointestinal Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hao Zhu
- Division of Hematology and Oncology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Liquid Biopsy and the Translational Bridge from the TIME to the Clinic. Cells 2022; 11:cells11193114. [PMID: 36231076 PMCID: PMC9563580 DOI: 10.3390/cells11193114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 09/09/2022] [Accepted: 09/28/2022] [Indexed: 11/16/2022] Open
Abstract
Research and advancing understanding of the tumor immune microenvironment (TIME) is vital to optimize and direct more effective cancer immune therapy. Pre-clinical bench research is vital to better understand the genomic interplay of the TIME and immune therapy responsiveness. However, a vital key to effective translational cancer research is having a bridge of translation to bring that understanding from the bench to the bedside. Without that bridge, research into the TIME will lack an efficient and effective translation into the clinic and cancer treatment decision making. As a clinical oncologist, the purpose of this commentary is to emphasize the importance of researching and improving clinical utility of the bridge, as well as the TIME research itself.
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Nikanjam M, Kato S, Kurzrock R. Liquid biopsy: current technology and clinical applications. J Hematol Oncol 2022; 15:131. [PMID: 36096847 PMCID: PMC9465933 DOI: 10.1186/s13045-022-01351-y] [Citation(s) in RCA: 172] [Impact Index Per Article: 86.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 09/06/2022] [Indexed: 11/10/2022] Open
Abstract
Liquid biopsies are increasingly used for cancer molecular profiling that enables a precision oncology approach. Circulating extracellular nucleic acids (cell-free DNA; cfDNA), circulating tumor DNA (ctDNA), and circulating tumor cells (CTCs) can be isolated from the blood and other body fluids. This review will focus on current technologies and clinical applications for liquid biopsies. ctDNA/cfDNA has been isolated and analyzed using many techniques, e.g., droplet digital polymerase chain reaction, beads, emulsion, amplification, and magnetics (BEAMing), tagged-amplicon deep sequencing (TAm-Seq), cancer personalized profiling by deep sequencing (CAPP-Seq), whole genome bisulfite sequencing (WGBS-Seq), whole exome sequencing (WES), and whole genome sequencing (WGS). CTCs have been isolated using biomarker-based cell capture, and positive or negative enrichment based on biophysical and other properties. ctDNA/cfDNA and CTCs are being exploited in a variety of clinical applications: differentiating unique immune checkpoint blockade response patterns using serial samples; predicting immune checkpoint blockade response based on baseline liquid biopsy characteristics; predicting response and resistance to targeted therapy and chemotherapy as well as immunotherapy, including CAR-T cells, based on serial sampling; assessing shed DNA from multiple metastatic sites; assessing potentially actionable alterations; analyzing prognosis and tumor burden, including after surgery; interrogating difficult-to biopsy tumors; and detecting cancer at early stages. The latter can be limited by the small amounts of tumor-derived components shed into the circulation; furthermore, cfDNA assessment in all cancers can be confounded by clonal hematopoeisis of indeterminate potential, especially in the elderly. CTCs can be technically more difficult to isolate that cfDNA, but permit functional assays, as well as evaluation of CTC-derived DNA, RNA and proteins, including single-cell analysis. Blood biopsies are less invasive than tissue biopsies and hence amenable to serial collection, which can provide critical molecular information in real time. In conclusion, liquid biopsy is a powerful tool, and remarkable advances in this technology have impacted multiple aspects of precision oncology, from early diagnosis to management of refractory metastatic disease. Future research may focus on fluids beyond blood, such as ascites, effusions, urine, and cerebrospinal fluid, as well as methylation patterns and elements such as exosomes.
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Affiliation(s)
- Mina Nikanjam
- Division of Hematology-Oncology, University of California San Diego, La Jolla, 1200 Garden View Road, Encinitas, CA, 92024, USA.
| | - Shumei Kato
- Division of Hematology-Oncology, University of California San Diego, La Jolla, 1200 Garden View Road, Encinitas, CA, 92024, USA
| | - Razelle Kurzrock
- Medical College of Wisconsin Cancer Center, Milwaukee, WI, USA.,WIN Consortium, Paris, France
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Sánchez-Herrero E, Serna-Blasco R, Robado de Lope L, González-Rumayor V, Romero A, Provencio M. Circulating Tumor DNA as a Cancer Biomarker: An Overview of Biological Features and Factors That may Impact on ctDNA Analysis. Front Oncol 2022; 12:943253. [PMID: 35936733 PMCID: PMC9350013 DOI: 10.3389/fonc.2022.943253] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/16/2022] [Indexed: 11/13/2022] Open
Abstract
Cancer cells release nucleic acids, freely or associated with other structures such as vesicles into body fluids, including blood. Among these nucleic acids, circulating tumor DNA (ctDNA) has emerged as a minimally invasive biomarker for tumor molecular profiling. However, certain biological characteristics of ctDNA are still unknown. Here, we provide an overview of the current knowledge about ctDNA biological features, including size and structure as well as the mechanisms of ctDNA shedding and clearance, and the physio-pathological factors that determine ctDNA levels. A better understanding of ctDNA biology is essential for the development of new methods that enable the analysis of ctDNA.
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Affiliation(s)
- Estela Sánchez-Herrero
- Liquid Biopsy Laboratory. Biomedical Sciences Research Institute Puerta de Hierro-Majadahonda, Majadahonda, Spain
- +D Department, Atrys Health, Barcelona, Spain
| | - Roberto Serna-Blasco
- Liquid Biopsy Laboratory. Biomedical Sciences Research Institute Puerta de Hierro-Majadahonda, Majadahonda, Spain
| | - Lucia Robado de Lope
- Liquid Biopsy Laboratory. Biomedical Sciences Research Institute Puerta de Hierro-Majadahonda, Majadahonda, Spain
| | | | - Atocha Romero
- Liquid Biopsy Laboratory. Biomedical Sciences Research Institute Puerta de Hierro-Majadahonda, Majadahonda, Spain
- Medical Oncology Department, Hospital Universitario Puerta de Hierro-Majadahonda, Majadahonda, Spain
- *Correspondence: Atocha Romero, ; orcid.org/0000-0002-1634-7397
| | - Mariano Provencio
- Liquid Biopsy Laboratory. Biomedical Sciences Research Institute Puerta de Hierro-Majadahonda, Majadahonda, Spain
- Medical Oncology Department, Hospital Universitario Puerta de Hierro-Majadahonda, Majadahonda, Spain
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Shaya J, Nonato T, Cabal A, Randall JM, Millard F, Stewart T, McKay RR. Analysis of the Prognostic Significance of Circulating Tumor DNA in Metastatic Castrate Resistant Prostate Cancer. Clin Genitourin Cancer 2021; 19:564.e1-564.e10. [PMID: 34452870 DOI: 10.1016/j.clgc.2021.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 07/18/2021] [Indexed: 12/25/2022]
Abstract
BACKGROUND There has been considerable interest in ctDNA next generation sequencing platforms to assess genomic alterations in mCRPC given its accessibility and identification of temporal genomic data. PATIENTSAND METHODS In this retrospective analysis, we analyzed 63 patients who underwent ctDNA genomic profiling during their mCRPC disease course using a CLIA-certified commercial assay. The primary objective was to assess the feasibility of commercial ctDNA analysis in a real world mCRPC cohort. Key secondary objectives included assessment of the landscape of pathogenic ctDNA alterations and the prognostic significance of ctDNA detection on overall survival (OS). RESULTS Among the cohort, at the time of ctDNA collection, median age was 70 years, and 47.6% (N = 30/63) had bone-only metastases. ctDNA was detected in the majority of patients with at least 1 pathogenic alteration detected in 90.5% (N = 57/63) of individuals. The most common alterations detected were in AR, TP53, and PIK3CA. Actionable alterations with FDA-approved therapies were found in 15.8% (N = 10) of the cohort. The presence of ≤ 1 versus > 1 alteration on ctDNA analysis was strongly associated with inferior OS with a median OS of 26.1 versus 8.8 months, respectively (HR = 7.0, 95% CI, 2.2-23.1, P < .001). In multivariate analysis, the number of detected alterations remained a significant predictor for OS. Lastly, there was weak correlation between Prostate-Specific Antigen (PSA), and ctDNA characteristics. CONCLUSION ctDNA is a viable next generation sequencing (NGS) platform in mCRPC and can be utilized to identify actionable alterations. The presence and extent of ctDNA alterations appear to be prognostic of OS in mCRPC.
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Affiliation(s)
- Justin Shaya
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA
| | - Taylor Nonato
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA
| | - Angelo Cabal
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA
| | - James Michael Randall
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA
| | - Frederick Millard
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA
| | - Tyler Stewart
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA
| | - Rana R McKay
- Division of Hematology-Oncology, Department of Medicine, University of California San Diego, San Diego, CA.
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Haghighat Jahromi A, Zabel M, Okamura R, Hoh CK, Kurzrock R. Variant allele fraction of genomic alterations in circulating tumor DNA (%ctDNA) correlates with SUV max in PET scan. AMERICAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 2021; 11:307-312. [PMID: 34513284 PMCID: PMC8414395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
The relationship between higher variant allele fraction (VAF) of genomic alterations in circulating tumor DNA (%ctDNA), an indicator of poor outcome, and maximum standardized uptake value (SUVmax), the most commonly used semi-quantitative parameter in 18F-FDG PET/CT, has not been studied. Overall, 433 cancer patients had blood-based next generation sequencing. Maximum and sum of %ctDNA alterations (%ctDNAmax and %ctDNAsum, respectively) represent the maximum and sum of VAF, reported as a percentage. The subset of 46 eligible patients had treatment-naïve metastatic disease and PET/CT imaging, with median 13 days prior to ctDNA testing. We found a linear correlation between the maximum VAF (%ctDNAmax) (as well as the sum of the VAFs (%ctDNAsum)) and SUVmax of the most 18F-FDG-avid lesion (r=0.43, P=0.003; r=0.43, P=0.002; respectively). Our data suggest that SUVmax may be a non-invasive and readily available surrogate indicator for %ctDNA, a prognostic factor for patient survival. Since higher %ctDNA has been previously correlated with worse outcome, the relationship between SUVmax, %ctDNA and survival warrants further study.
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Affiliation(s)
- Amin Haghighat Jahromi
- Department of Radiology, University of CaliforniaSan Diego, La Jolla, California, USA
- Division of Nuclear Medicine, Edward Mallinckrodt Institute of Radiology, Washington University School of MedicineSt. Louis, MO, USA
| | - Matthew Zabel
- Department of Radiology, University of CaliforniaSan Diego, La Jolla, California, USA
| | - Ryosuke Okamura
- Center for Personalized Cancer Therapy and Division of Hematology and Oncology, Department of Medicine, University of California San Diego Moores Cancer CenterLa Jolla, CA, USA
| | - Carl K Hoh
- Department of Radiology, University of CaliforniaSan Diego, La Jolla, California, USA
| | - Razelle Kurzrock
- Center for Personalized Cancer Therapy and Division of Hematology and Oncology, Department of Medicine, University of California San Diego Moores Cancer CenterLa Jolla, CA, USA
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Adashek JJ, Janku F, Kurzrock R. Signed in Blood: Circulating Tumor DNA in Cancer Diagnosis, Treatment and Screening. Cancers (Basel) 2021; 13:3600. [PMID: 34298813 PMCID: PMC8306582 DOI: 10.3390/cancers13143600] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/23/2021] [Accepted: 07/13/2021] [Indexed: 12/18/2022] Open
Abstract
With the addition of molecular testing to the oncologist's diagnostic toolbox, patients have benefitted from the successes of gene- and immune-directed therapies. These therapies are often most effective when administered to the subset of malignancies harboring the target identified by molecular testing. An important advance in the application of molecular testing is the liquid biopsy, wherein circulating tumor DNA (ctDNA) is analyzed for point mutations, copy number alterations, and amplifications by polymerase chain reaction (PCR) and/or next-generation sequencing (NGS). The advantages of evaluating ctDNA over tissue DNA include (i) ctDNA requires only a tube of blood, rather than an invasive biopsy, (ii) ctDNA can plausibly reflect DNA shedding from multiple metastatic sites while tissue DNA reflects only the piece of tissue biopsied, and (iii) dynamic changes in ctDNA during therapy can be easily followed with repeat blood draws. Tissue biopsies allow comprehensive assessment of DNA, RNA, and protein expression in the tumor and its microenvironment as well as functional assays; however, tumor tissue acquisition is costly with a risk of complications. Herein, we review the ways in which ctDNA assessment can be leveraged to understand the dynamic changes of molecular landscape in cancers.
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Affiliation(s)
- Jacob J. Adashek
- Department of Internal Medicine, University of South Florida, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33606, USA
| | - Filip Janku
- Department of Investigational Cancer Therapeutics (Phase 1 Clinical Trials Program), Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
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Strategies for the successful implementation of plasma-based NSCLC genotyping in clinical practice. Nat Rev Clin Oncol 2020; 18:56-62. [PMID: 32918064 DOI: 10.1038/s41571-020-0423-x] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/24/2020] [Indexed: 12/11/2022]
Abstract
Upfront tumour genotyping is now considered an essential step in guiding treatment decision-making in the management of patients with advanced-stage non-small-cell lung cancer (NSCLC) in light of the ever-expanding toolbox of targeted therapies and immune-checkpoint inhibitors. However, genotyping of tumour biopsy samples is not feasible for all patients and, therefore, genomic analysis of circulating tumour DNA (ctDNA) has emerged as a compelling non-invasive option. Current guidelines universally recommend genotyping and support the use of ctDNA testing in certain settings, although they often omit the detail necessary for integrating these tests into clinical care on an individual basis. In this Perspective, we describe the rationale, promise and challenges associated with ctDNA-based NSCLC genotyping and suggest a framework for the implementation of these assays into routine clinical practice. We also offer considerations for the interpretation of ctDNA genotyping results, which, particularly when using next-generation sequencing panels, can be nuanced. Through the addition of this new approach to clinical practice, we propose that oncologists might finally be able to utilize effective genotyping in nearly all patients with advanced-stage NSCLC.
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