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Ritch EJ, Herberts C, Warner EW, Ng SWS, Kwan EM, Bacon JVW, Bernales CQ, Schönlau E, Fonseca NM, Giri VN, Maurice-Dror C, Vandekerkhove G, Jones SJM, Chi KN, Wyatt AW. A generalizable machine learning framework for classifying DNA repair defects using ctDNA exomes. NPJ Precis Oncol 2023; 7:27. [PMID: 36914848 PMCID: PMC10011564 DOI: 10.1038/s41698-023-00366-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 02/27/2023] [Indexed: 03/16/2023] Open
Abstract
Specific classes of DNA damage repair (DDR) defect can drive sensitivity to emerging therapies for metastatic prostate cancer. However, biomarker approaches based on DDR gene sequencing do not accurately predict DDR deficiency or treatment benefit. Somatic alteration signatures may identify DDR deficiency but historically require whole-genome sequencing of tumour tissue. We assembled whole-exome sequencing data for 155 high ctDNA fraction plasma cell-free DNA and matched leukocyte DNA samples from patients with metastatic prostate or bladder cancer. Labels for DDR gene alterations were established using deep targeted sequencing. Per sample mutation and copy number features were used to train XGBoost ensemble models. Naive somatic features and trinucleotide signatures were associated with specific DDR gene alterations but insufficient to resolve each class. Conversely, XGBoost-derived models showed strong performance including an area under the curve of 0.99, 0.99 and 1.00 for identifying BRCA2, CDK12, and mismatch repair deficiency in metastatic prostate cancer. Our machine learning approach re-classified several samples exhibiting genomic features inconsistent with original labels, identified a metastatic bladder cancer sample with a homozygous BRCA2 copy loss, and outperformed an existing exome-based classifier for BRCA2 deficiency. We present DARC Sign (DnA Repair Classification SIGNatures); a public machine learning tool leveraging clinically-practical liquid biopsy specimens for simultaneously identifying multiple types of metastatic prostate cancer DDR deficiencies. We posit that it will be useful for understanding differential responses to DDR-directed therapies in ongoing clinical trials and may ultimately enable prospective identification of prostate cancers with phenotypic evidence of DDR deficiency.
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Affiliation(s)
- Elie J Ritch
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Cameron Herberts
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Evan W Warner
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Sarah W S Ng
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Edmond M Kwan
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Jack V W Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Cecily Q Bernales
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Elena Schönlau
- Department of Medical Oncology, BC Cancer, Vancouver, BC, Canada
| | - Nicolette M Fonseca
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Veda N Giri
- Yale School of Medicine and Yale Cancer Center, New Haven, CT, USA
| | | | - Gillian Vandekerkhove
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Steven J M Jones
- Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, Canada
| | - Kim N Chi
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada.,Department of Medical Oncology, BC Cancer, Vancouver, BC, Canada
| | - Alexander W Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada. .,Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, BC, Canada.
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2
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Bacon JVW, Müller DC, Ritch E, Annala M, Dugas SG, Herberts C, Vandekerkhove G, Seifert H, Zellweger T, Black PC, Bubendorf L, Wyatt AW, Rentsch CA. Somatic Features of Response and Relapse in Non-muscle-invasive Bladder Cancer Treated with Bacillus Calmette-Guérin Immunotherapy. Eur Urol Oncol 2022; 5:677-686. [PMID: 34895867 DOI: 10.1016/j.euo.2021.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/13/2021] [Accepted: 11/13/2021] [Indexed: 01/26/2023]
Abstract
BACKGROUND High-risk non-muscle-invasive bladder cancer (NMIBC) is treated with bacillus Calmette-Guérin (BCG), but relapse is common. Improvement of patient outcomes requires better understanding of links between BCG resistance and genomic driver alterations. OBJECTIVE To validate the prognostic impact of common genomic alterations in NMIBC pretreatment and define somatic changes present in post-BCG relapses. DESIGN, SETTING, AND PARTICIPANTS We retrieved tumour tissues and outcomes for 90 patients with BCG-naive NMIBC initiating BCG monotherapy. Post-BCG tissue was available from 34 patients. All tissues underwent targeted sequencing of tumour and matched normal. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Associations between clinical outcomes and genomics were determined using Cox proportional hazard models. RESULTS AND LIMITATIONS Of the patients, 58% were relapse free at data cut-off, 24% had NMIBC recurrence, and 18% experienced muscle-invasive progression. The risk of relapse was associated with ARID1A mutation (hazard ratio [HR] = 2.00; p = 0.04) and CCNE1 amplification (HR = 2.61; p = 0.02). Pre- and post-BCG tumours shared truncal driver alterations, with mutations in TERT and chromatin remodelling genes particularly conserved. However, shifts in somatic profiles were common and clinically relevant alterations in FGFR3, PIK3CA, TSC1, and TP53 were temporally variable, despite apparent clonal prevalence at one time point. Limitations include the difficulty of resolving the relative impact of BCG therapy versus surgery on genomics at relapse and biopsy bias. CONCLUSIONS Somatic hypermutation and alterations in CCNE1 and ARID1A should be incorporated into future models predicting NMIBC BCG outcomes. Changes in tumour genomics over time highlight the importance of recent biopsy when considering targeted therapies, and suggest that relapse after BCG is due to persisting and evolving precursor populations. PATIENT SUMMARY Changes in key cancer genes can predict bladder cancer relapse after treatment with bacillus Calmette-Guérin. Relapses after treatment can be driven by large-scale genetic changes within the cancer. These genetic changes help us understand how superficial bladder cancer can progress to be treatment resistant.
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Affiliation(s)
- Jack V W Bacon
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - David C Müller
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland; Department of Urology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Elie Ritch
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Matti Annala
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada; Prostate Cancer Research Center, Faculty of Medicine and Life Sciences and BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Sarah G Dugas
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland; Department of Urology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Cameron Herberts
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Gillian Vandekerkhove
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Helge Seifert
- Department of Urology, University Hospital Basel, University of Basel, Basel, Switzerland
| | | | - Peter C Black
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lukas Bubendorf
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Alexander W Wyatt
- Department of Urologic Sciences, Vancouver Prostate Centre, University of British Columbia, Vancouver, British Columbia, Canada; Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, British Columbia, Canada.
| | - Cyrill A Rentsch
- Department of Urology, University Hospital Basel, University of Basel, Basel, Switzerland.
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3
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Bacon JVW, Giannatempo P, Cataldo G, Fazli L, Saxena N, Ozgun G, Soleimani M, Chi K, Nichols C, Necchi A, Wyatt AW, Kollmannsberger CK, Nappi L. TP53 Alterations Are Associated With Poor Survival in Patients With Primary Mediastinal Nonseminoma Germ Cell Tumors. Oncologist 2022; 27:e912-e915. [PMID: 36166584 PMCID: PMC9632310 DOI: 10.1093/oncolo/oyac197] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 08/17/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Primary mediastinal nonseminoma germ cell tumors (PMNSGCT) are a subgroup of nonseminoma germ cell tumors (GCT) with poor prognosis. In this study, PMNSGCT-specific genomic landscape was analyzed and correlated with clinical outcomes. METHODS DNA was extracted and sequenced from 28 archival tumor tissue of patients with mediastinal GCT (3 seminoma and 25 nonseminoma). Overall survival (OS) and association with gene alterations were estimated using the Kaplan-Meier and univariate Cox regression methods. RESULTS Three patients (11%) had a karyotype XXY, 17/28 (61%) tumor samples presented chromosome 12p amplification. Somatic mutations were detected in 19/28 (68%) samples. The most frequently mutated genes were: TP53 (13/28; 46%), KIT (5/28; 18%), and KRAS (5/28; 18%). Deleterious TP53 alterations were associated with significantly reduced overall survival (HR: 7.16; P = .012). CONCLUSIONS TP53 alterations are common in PMNSGCT and are associated with reduced overall survival, potentially underlying the poor sensitivity to chemotherapy observed in these patients.
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Affiliation(s)
- Jack V W Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Patrizia Giannatempo
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei tumori, Milan, Italy
| | | | - Ladan Fazli
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Neetu Saxena
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Guliz Ozgun
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Maryam Soleimani
- Department of Medical Oncology, BC Cancer, British Columbia, Canada
| | - Kim Chi
- Department of Medical Oncology, BC Cancer, British Columbia, Canada
| | | | - Andrea Necchi
- Vita-Salute San Raffaele University; IRCCS San Raffaele Hospital, Milan, Italy
| | - Alexander W Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada,Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, British Columbia, Canada
| | - Christian K Kollmannsberger
- Christian Kollmannsberger, Department of Medical Oncology, BC Cancer, 600 West 10th Avenue, Vancouver, BC, Canada V5Z 4E6. Tel: +1 604 877 6000; Fax: +1 604 708 2144;
| | - Lucia Nappi
- Corresponding author: Lucia Nappi, MD, PhD, Department of Medical Oncology, BC Cancer, 600 West 10th Avenue, Vancouver, BC, Canada V5Z 4E6. Tel: +1 604 877 6000; Fax: +1 604 877 0585;
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4
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Herberts C, Annala M, Sipola J, Ng SWS, Chen XE, Nurminen A, Korhonen OV, Munzur AD, Beja K, Schönlau E, Bernales CQ, Ritch E, Bacon JVW, Lack NA, Nykter M, Aggarwal R, Small EJ, Gleave ME, Quigley DA, Feng FY, Chi KN, Wyatt AW. Deep whole-genome ctDNA chronology of treatment-resistant prostate cancer. Nature 2022; 608:199-208. [PMID: 35859180 DOI: 10.1038/s41586-022-04975-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 06/14/2022] [Indexed: 01/20/2023]
Abstract
Circulating tumour DNA (ctDNA) in blood plasma is an emerging tool for clinical cancer genotyping and longitudinal disease monitoring1. However, owing to past emphasis on targeted and low-resolution profiling approaches, our understanding of the distinct populations that comprise bulk ctDNA is incomplete2-12. Here we perform deep whole-genome sequencing of serial plasma and synchronous metastases in patients with aggressive prostate cancer. We comprehensively assess all classes of genomic alterations and show that ctDNA contains multiple dominant populations, the evolutionary histories of which frequently indicate whole-genome doubling and shifts in mutational processes. Although tissue and ctDNA showed concordant clonally expanded cancer driver alterations, most individual metastases contributed only a minor share of total ctDNA. By comparing serial ctDNA before and after clinical progression on potent inhibitors of the androgen receptor (AR) pathway, we reveal population restructuring converging solely on AR augmentation as the dominant genomic driver of acquired treatment resistance. Finally, we leverage nucleosome footprints in ctDNA to infer mRNA expression in synchronously biopsied metastases, including treatment-induced changes in AR transcription factor signalling activity. Our results provide insights into cancer biology and show that liquid biopsy can be used as a tool for comprehensive multi-omic discovery.
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Affiliation(s)
- Cameron Herberts
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Matti Annala
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada.,Prostate Cancer Research Center, Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Center, Tampere, Finland
| | - Joonatan Sipola
- Prostate Cancer Research Center, Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Center, Tampere, Finland
| | - Sarah W S Ng
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Xinyi E Chen
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Anssi Nurminen
- Prostate Cancer Research Center, Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Center, Tampere, Finland
| | - Olga V Korhonen
- Prostate Cancer Research Center, Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Center, Tampere, Finland
| | - Aslı D Munzur
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kevin Beja
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Elena Schönlau
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Cecily Q Bernales
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Elie Ritch
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jack V W Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nathan A Lack
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada.,School of Medicine, Koç University, Istanbul, Turkey.,Koç University Research Centre for Translational Medicine, Koç University, Istanbul, Turkey
| | - Matti Nykter
- Prostate Cancer Research Center, Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Center, Tampere, Finland
| | - Rahul Aggarwal
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.,Division of Hematology and Oncology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Eric J Small
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.,Division of Hematology and Oncology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Martin E Gleave
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - David A Quigley
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.,Department of Urology, University of California San Francisco, San Francisco, CA, USA.,Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
| | - Felix Y Feng
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.,Division of Hematology and Oncology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA.,Department of Urology, University of California San Francisco, San Francisco, CA, USA.,Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Kim N Chi
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada.,Department of Medical Oncology, BC Cancer, Vancouver, British Columbia, Canada
| | - Alexander W Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada. .,Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, British Columbia, Canada.
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5
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Annala M, Fu S, Bacon JVW, Sipola J, Iqbal N, Ferrario C, Ong M, Wadhwa D, Hotte SJ, Lo G, Tran B, Wood LA, Gingerich JR, North SA, Pezaro CJ, Ruether JD, Sridhar SS, Kallio HML, Khalaf DJ, Wong A, Beja K, Schönlau E, Taavitsainen S, Nykter M, Vandekerkhove G, Azad AA, Wyatt AW, Chi KN. Cabazitaxel versus abiraterone or enzalutamide in poor prognosis metastatic castration-resistant prostate cancer: a multicentre, randomised, open-label, phase II trial. Ann Oncol 2021; 32:896-905. [PMID: 33836265 DOI: 10.1016/j.annonc.2021.03.205] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/10/2021] [Accepted: 03/29/2021] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Treatment of poor prognosis metastatic castration-resistant prostate cancer (mCRPC) includes taxane chemotherapy and androgen receptor pathway inhibitors (ARPI). We sought to determine optimal treatment in this setting. PATIENTS AND METHODS This multicentre, randomised, open-label, phase II trial recruited patients with ARPI-naive mCRPC and poor prognosis features (presence of liver metastases, progression to mCRPC after <12 months of androgen deprivation therapy, or ≥4 of 6 clinical criteria). Patients were randomly assigned 1 : 1 to receive cabazitaxel plus prednisone (group A) or physician's choice of enzalutamide or abiraterone plus prednisone (group B) at standard doses. Patients could cross over at progression. The primary endpoint was clinical benefit rate for first-line treatment (defined as prostate-specific antigen response ≥50%, radiographic response, or stable disease ≥12 weeks). RESULTS Ninety-five patients were accrued (median follow-up 21.9 months). First-line clinical benefit rate was greater in group A versus group B (80% versus 62%, P = 0.039). Overall survival was not different between groups A and B (median 37.0 versus 15.5 months, hazard ratio (HR) = 0.58, P = 0.073) nor was time to progression (median 5.3 versus 2.8 months, HR = 0.87, P = 0.52). The most common first-line treatment-related grade ≥3 adverse events were neutropenia (cabazitaxel 32% versus ARPI 0%), diarrhoea (9% versus 0%), infection (9% versus 0%), and fatigue (7% versus 5%). Baseline circulating tumour DNA (ctDNA) fraction above the cohort median and on-treatment ctDNA increase were associated with shorter time to progression (HR = 2.38, P < 0.001; HR = 4.03, P < 0.001). Patients with >30% ctDNA fraction at baseline had markedly shorter overall survival than those with undetectable ctDNA (HR = 38.22, P < 0.001). CONCLUSIONS Cabazitaxel was associated with a higher clinical benefit rate in patients with ARPI-naive poor prognosis mCRPC. ctDNA abundance was prognostic independent of clinical features, and holds promise as a stratification biomarker.
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Affiliation(s)
- M Annala
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada; Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Centre, Tampere, Finland
| | - S Fu
- Department of Medical Oncology, BC Cancer, Vancouver, Canada; Oncology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - J V W Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada
| | - J Sipola
- Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Centre, Tampere, Finland
| | - N Iqbal
- Medical Oncology, Saskatoon Cancer Centre, University of Saskatchewan, Saskatoon, Canada
| | - C Ferrario
- Jewish General Hospital, McGill University, Montréal, Quebec, Canada
| | - M Ong
- Department of Medicine, Division of Medical Oncology, The Ottawa Hospital and the University of Ottawa, Ottawa, Canada
| | - D Wadhwa
- BC Cancer - Kelowna Centre, Kelowna, Canada
| | - S J Hotte
- Oncology, Juravinski Cancer Centre, Hamilton, Canada
| | - G Lo
- Department of Medical Oncology, R. S. McLaughlin Durham Regional Cancer Centre, Lakeridge Health, Oshawa, Canada
| | - B Tran
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - L A Wood
- QEII Health Sciences Centre, Halifax, Canada
| | - J R Gingerich
- Department of Medical Oncology and Hematology, Cancer Care Manitoba, Winnipeg, Canada
| | - S A North
- Department of Oncology, University of Alberta, Edmonton, Canada
| | - C J Pezaro
- Eastern Health Clinical School, Monash University, Australia; Department of Oncology, Eastern Health, Australia
| | | | - S S Sridhar
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, Canada
| | - H M L Kallio
- Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Centre, Tampere, Finland
| | - D J Khalaf
- Department of Medical Oncology, BC Cancer, Vancouver, Canada
| | - A Wong
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada
| | - K Beja
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada
| | - E Schönlau
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada
| | - S Taavitsainen
- Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Centre, Tampere, Finland
| | - M Nykter
- Faculty of Medicine and Health Technology, Tampere University and Tays Cancer Centre, Tampere, Finland
| | - G Vandekerkhove
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada
| | - A A Azad
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia
| | - A W Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada; Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, Canada.
| | - K N Chi
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada; Department of Medical Oncology, BC Cancer, Vancouver, Canada.
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Bacon JVW, Annala M, Soleimani M, Lavoie JM, So AI, Gleave ME, Fazli L, Chi KN, Kollmannsberger CK, Wyatt AW, Nappi L. Abstract A18: Plasma circulating tumor DNA is scarce and confounded by clonal hematopoiesis in metastatic renal cell carcinoma. Clin Cancer Res 2020. [DOI: 10.1158/1557-3265.liqbiop20-a18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Despite the recent implementation of novel targeted therapies, the 5-year survival rate for metastatic renal cell carcinoma (mRCC) remains dismal. Prognostic and predictive biomarkers are urgently required to avoid unnecessary patient morbidity and financial toxicity. Exploratory studies leveraging archival primary tumor tissue are considered suboptimal in this setting due to the considerable heterogeneity of metastatic lesions. Circulating tumor DNA (ctDNA) permits the noninvasive characterization of metastatic cancers using a simple blood draw. In this study, we sought to establish the utility of a ctDNA-based assay as a tool to profile the somatic genome of patients with mRCC. We collected whole blood from 55 progressing mRCC patients. All patients were systemic therapy naïve at the time of sample collection. Plasma cell-free DNA (cfDNA) and matched leukocyte DNA were subjected to targeted sequencing across 981 cancer-associated genes. Matched tumor tissue from 14 patients was also analyzed. The median cfDNA sequencing depth for this cohort was 938x. 33% of patients had evidence for RCC-derived ctDNA above 1% of total cfDNA; this was significantly lower than prostate or bladder cancer patients analyzed using the same approach. Among ctDNA-positive patients, ctDNA fraction averaged only 3.9% and showed no association with clinical variables or cfDNA yield. In these patients, the most commonly mutated genes were VHL, BAP1, and PBRM1, and matched tissue concordance was 77%. Evidence of somatic expansions unrelated to RCC, such as clonal hematopoiesis of indeterminate potential (CHIP), was detected in 43% of patients. Pathogenic germline mutations in DNA repair genes were detected in 11% of patients. Patients with ctDNA above 1% had shorter overall survival and progression-free survival on first-line therapy. Patients with evidence of CHIP but not ctDNA had an intermediate prognosis compared to ctDNA-positive and ctDNA-negative patients. CfDNA sequencing enables characterization of the somatic RCC genome in only a minority of metastatic RCC patients. Due to low ctDNA abundance and presence of non-RCC derived somatic clones in circulation, cfDNA sequencing may not be a simple pan-patient alternative to tissue biopsy in metastatic RCC.
Citation Format: Jack V. W. Bacon, Matti Annala, Maryam Soleimani, Jean-Michel Lavoie, Alan I. So, Martin E. Gleave, Ladan Fazli, Kim N. Chi, Christian K. Kollmannsberger, Alexander W. Wyatt, Lucia Nappi. Plasma circulating tumor DNA is scarce and confounded by clonal hematopoiesis in metastatic renal cell carcinoma [abstract]. In: Proceedings of the AACR Special Conference on Advances in Liquid Biopsies; Jan 13-16, 2020; Miami, FL. Philadelphia (PA): AACR; Clin Cancer Res 2020;26(11_Suppl):Abstract nr A18.
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Affiliation(s)
| | | | | | | | - Alan I. So
- 1Vancouver Prostate Centre, Vancouver, BC, Canada,
| | | | - Ladan Fazli
- 1Vancouver Prostate Centre, Vancouver, BC, Canada,
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7
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Bacon JVW, Annala M, Soleimani M, Lavoie JM, So A, Gleave ME, Fazli L, Wang G, Chi KN, Kollmannsberger CK, Wyatt AW, Nappi L. Plasma Circulating Tumor DNA and Clonal Hematopoiesis in Metastatic Renal Cell Carcinoma. Clin Genitourin Cancer 2020; 18:322-331.e2. [PMID: 32046920 DOI: 10.1016/j.clgc.2019.12.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 12/26/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND There is a lack of molecularly-informed biomarkers for patients with metastatic renal cell carcinoma (RCC). Plasma cell-free DNA (cfDNA) sequencing is a minimally-invasive alternative to tissue for profiling the genome in other cancers but relevance in metastatic RCC remains unclear. MATERIALS AND METHODS Whole blood was collected from 55 patients with metastatic RCC. Plasma cfDNA and leukocyte DNA were subjected to targeted sequencing across 981 cancer genes. Matched tumor tissue from 14 patients was analyzed. RESULTS Thirty-three percent of patients had evidence for RCC-derived circulating tumor DNA (ctDNA), significantly lower than patients with metastatic prostate or bladder cancer analyzed using the same approach. Among ctDNA-positive patients, ctDNA fraction averaged only 3.9% and showed no strong association with clinical variables. In these patients, the most commonly mutated genes were VHL, BAP1, and PBRM1, and matched tissue concordance was 77%. Evidence of somatic expansions unrelated to RCC, such as clonal hematopoiesis of indeterminate potential, were detected in 43% of patients. Pathogenic germline mutations in DNA repair genes were detected in 11% of patients. CtDNA-positive patients had shorter overall survival and progression-free survival on first-line therapy. Patients with evidence of clonal hematopoiesis of indeterminate potential had an intermediate prognosis compared with ctDNA-positive and -negative patients. CONCLUSIONS CfDNA sequencing enables straightforward characterization of the somatic RCC genome in a minority of patients with metastatic RCC. Owing to low ctDNA abundance, and the presence of non-RCC derived somatic clones in circulation, cfDNA sequencing may not be a simple pan-patient alternative to tissue biopsy in metastatic RCC.
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Affiliation(s)
- Jack V W Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Matti Annala
- Prostate Cancer Research Center, Faculty of Medicine and Life Sciences and BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Maryam Soleimani
- Department of Medical Oncology, BC Cancer, British Columbia, Canada
| | | | - Alan So
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Martin E Gleave
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Ladan Fazli
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada
| | - Gang Wang
- Department of Medical Oncology, BC Cancer, British Columbia, Canada
| | - Kim N Chi
- Department of Medical Oncology, BC Cancer, British Columbia, Canada
| | | | - Alexander W Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada.
| | - Lucia Nappi
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, British Columbia, Canada; Department of Medical Oncology, BC Cancer, British Columbia, Canada
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8
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Dugas SG, Müller DC, Le Magnen C, Federer‐Gsponer J, Seifert H, Ruiz C, Savic Prince S, Vlajnic T, Zellweger T, Mertz KD, Bacon JVW, Wyatt AW, Rentsch CA, Bubendorf L. Immunocytochemistry for ARID1A as a potential biomarker in urine cytology of bladder cancer. Cancer Cytopathol 2019; 127:578-585. [DOI: 10.1002/cncy.22167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 07/08/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Sarah G. Dugas
- Department of Urology University Hospital Basel Basel Switzerland
- Institute of Pathology University Hospital Basel Basel Switzerland
| | - David C. Müller
- Institute of Pathology University Hospital Basel Basel Switzerland
| | - Clémentine Le Magnen
- Department of Urology University Hospital Basel Basel Switzerland
- Institute of Pathology University Hospital Basel Basel Switzerland
| | | | | | - Christian Ruiz
- Institute of Pathology University Hospital Basel Basel Switzerland
| | | | - Tatjana Vlajnic
- Institute of Pathology University Hospital Basel Basel Switzerland
| | | | - Kirsten D. Mertz
- Institute of Pathology Cantonal Hospital Baselland Liestal Switzerland
| | - Jack V. W. Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences University of British Columbia Vancouver British Columbia Canada
| | - Alexander W. Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences University of British Columbia Vancouver British Columbia Canada
| | | | - Lukas Bubendorf
- Institute of Pathology University Hospital Basel Basel Switzerland
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9
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Annala M, Taavitsainen S, Vandekerkhove G, Bacon JVW, Beja K, Chi KN, Nykter M, Wyatt AW. Frequent mutation of the FOXA1 untranslated region in prostate cancer. Commun Biol 2018; 1:122. [PMID: 30272002 PMCID: PMC6123809 DOI: 10.1038/s42003-018-0128-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 08/03/2018] [Indexed: 12/26/2022] Open
Abstract
Prostate cancer has a low somatic mutation rate but non-coding regions remain underexplored. We sequenced the untranslated regions (UTRs) of 72 established driver genes in 428 patients with metastatic prostate cancer and identified FOXA1 3'-UTR mutations in 12% of patients. The mutations were predominantly insertions or deletions, covered the entire UTR without motif enrichment, and were not detected in other cancers. FOXA1 lies in head-on orientation with the androgen-regulated non-coding gene AL121790.1, resulting in strong prostate lineage-specific bidirectional transcription across the FOXA1 3'-UTR. This suggests transcriptional activity as a cause for the localized hypermutation. The indel-dominant pattern of somatic mutation extends into the FOXA1 coding region, where it is shaped by clonal selection to yield a cluster of non-frameshift indels inside the forkhead domain. Somatic FOXA1 3'-UTR mutations may prove useful for diagnostic and screening approaches, given their high frequency and lineage specificity.
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Affiliation(s)
- Matti Annala
- Faculty of Medicine and Life Sciences and Biomeditech Institute, University of Tampere, FI-33520, Tampere, Finland
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, V6H 3Z6, Canada
| | - Sinja Taavitsainen
- Faculty of Medicine and Life Sciences and Biomeditech Institute, University of Tampere, FI-33520, Tampere, Finland
| | - Gillian Vandekerkhove
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, V6H 3Z6, Canada
| | - Jack V W Bacon
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, V6H 3Z6, Canada
| | - Kevin Beja
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, V6H 3Z6, Canada
| | - Kim N Chi
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, V6H 3Z6, Canada
- Department of Medical Oncology, British Columbia Cancer Agency, Vancouver, BC, V5Z 1G1, Canada
| | - Matti Nykter
- Faculty of Medicine and Life Sciences and Biomeditech Institute, University of Tampere, FI-33520, Tampere, Finland
| | - Alexander W Wyatt
- Vancouver Prostate Centre, Department of Urologic Sciences, University of British Columbia, Vancouver, BC, V6H 3Z6, Canada.
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