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Liu Y, Du Q, Sun D, Han R, Teng M, Chen S, You H, Dong Y. Clinical applications of circulating tumor DNA in monitoring breast cancer drug resistance. Future Oncol 2020; 16:2863-2878. [PMID: 32976028 DOI: 10.2217/fon-2019-0760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Breast cancer is one of the leading causes of cancer-related deaths in women worldwide. Unfortunately, treatments often fail because of the development of drug resistance, the underlying mechanisms of which remain unclear. Circulating tumor DNA (ctDNA) is free DNA released into the blood by necrosis, apoptosis or direct secretion by tumor cells. In contrast to repeated, highly invasive tumor biopsies, ctDNA reflects all molecular alterations of tumors dynamically and captures both spatial and temporal tumor heterogeneity. Highly sensitive technologies, including personalized digital PCR and deep sequencing, make it possible to monitor response to therapies, predict drug resistance and tailor treatment regimens by identifying the genomic alteration profile of ctDNA, thereby achieving precision medicine. This review focuses on the current status of ctDNA biology, the technologies used to detect ctDNA and the potential clinical applications of identifying drug resistance mechanisms by detecting tumor-specific genomic alterations in breast cancer.
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Affiliation(s)
- Yang Liu
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Qian Du
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Dan Sun
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Ruiying Han
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Mengmeng Teng
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Siying Chen
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Haisheng You
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
| | - Yalin Dong
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, PR China
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van Geelen CT, Savas P, Teo ZL, Luen SJ, Weng CF, Ko YA, Kuykhoven KS, Caramia F, Salgado R, Francis PA, Dawson SJ, Fox SB, Fellowes A, Loi S. Clinical implications of prospective genomic profiling of metastatic breast cancer patients. Breast Cancer Res 2020; 22:91. [PMID: 32811538 PMCID: PMC7436992 DOI: 10.1186/s13058-020-01328-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 08/10/2020] [Indexed: 12/19/2022] Open
Abstract
Background Metastatic breast cancer remains incurable. Next-generation sequencing (NGS) offers the ability to identify actionable genomic alterations in tumours which may then be matched with targeted therapies, but the implementation and utility of this approach is not well defined for patients with metastatic breast cancer. Methods We recruited patients with advanced breast cancer of any subtype for prospective targeted NGS of their most recent tumour samples, using a panel of 108 breast cancer-specific genes. Genes were classified as actionable or non-actionable using the European Society of Medical Oncology Scale for Clinical Actionability of Molecular Targets (ESCAT) guidelines. Results Between February 2014 and May 2019, 322 patients were enrolled onto the study, with 72% (n = 234) of patients successfully sequenced (n = 357 samples). The majority (74%, n = 171) of sequenced patients were found to carry a potentially actionable alteration, the most common being a PIK3CA mutation. Forty-three percent (n = 74) of patients with actionable alterations were referred for a clinical trial or referred for confirmatory germline testing or had a change in therapy outside of clinical trials. We found alterations in AKT1, BRCA2, CHEK2, ESR1, FGFR1, KMT2C, NCOR1, PIK3CA and TSC2 to be significantly enriched in our metastatic population compared with primary breast cancers. Concordance between primary and metastatic samples for key driver genes (TP53, ERBB2 amplification) was > 75%. Additionally, we found that patients with a higher number of mutations had a significantly worse overall survival. Conclusion Genomic profiling of patients with metastatic breast cancer can have clinical implications and should be considered in all suitable patients.
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Affiliation(s)
| | - Peter Savas
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia.,Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Zhi Ling Teo
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Stephen J Luen
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia.,Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Chen-Fang Weng
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Yi-An Ko
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Keilly S Kuykhoven
- Australian Centre for Disease Preparedness, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Health and Biosecurity, Geelong, Australia
| | - Franco Caramia
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Roberto Salgado
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Prudence A Francis
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, 305 Grattan St, Melbourne, VIC, 3000, Australia
| | - Sarah-Jane Dawson
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia.,Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, 305 Grattan St, Melbourne, VIC, 3000, Australia
| | - Stephen B Fox
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia.,Department of Pathology, Peter MacCallum Cancer Centre, Melbourne, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, 305 Grattan St, Melbourne, VIC, 3000, Australia
| | - Andrew Fellowes
- Department of Pathology, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - Sherene Loi
- Division of Research, Peter MacCallum Cancer Centre, Melbourne, Australia. .,Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia. .,Sir Peter MacCallum Department of Oncology, University of Melbourne, 305 Grattan St, Melbourne, VIC, 3000, Australia.
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Fonseca IB, Lindote MVN, Monteiro MR, Doria Filho E, Pinto CAL, Jafelicci AS, de Melo Lôbo M, Calsavara VF, Bertolli E, Duprat Neto JP. Sentinel Node Status is the Most Important Prognostic Information for Clinical Stage IIB and IIC Melanoma Patients. Ann Surg Oncol 2020; 27:4133-4140. [PMID: 32767223 DOI: 10.1245/s10434-020-08959-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 07/02/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Sentinel node biopsy (SNB) for melanoma patients has been questioned. We aimed to study high-risk stage II melanoma patients who underwent SNB to determine what the prognostic factors regarding recurrence and mortality were, and evaluate how relevant SNB status is in this scenario. METHODS This was a retrospective analysis of clinical stage IIB/IIC melanoma patients who underwent SNB from 2000 to 2015 in a single institution. Prognostic factors related to distant recurrence-free survival (DRFS) and melanoma-specific survival (MSS) were assessed from multiple Cox regression. Relevant variables were used to create risk predictor nomograms for DRFS and MSS. RESULTS From 1213 SNB, 259 were performed for clinical stage IIB/IIC melanoma patients. SNB status was the most important variable for both endpoints. Patients with positive SNB presented median DRFS of 35.73 months (95% CI 21.38-50.08, SE 7.32) and median MSS of 66.4 months (95% CI 29.76-103.03, SE 18.69), meanwhile both median DRFS and MSS were not achieved for those with negative SNB (logrank < 0.0001). Both nomograms have been internally validated and presented adequate calibration (C-index was 0.734 for DRFS and 0.718 for MSS). CONCLUSIONS SNB status was the most important risk factor in our cohort of clinical stage IIB and IIC patients and, in conjunction with well-established primary tumor characteristics, should not be abandoned. Their use in prognosis for these patients remains extremely useful for daily practice.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Eduardo Bertolli
- Skin Cancer Department, A. C. Camargo Cancer Center, São Paulo, SP, Brazil.
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