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Kassem PH, Montasser IF, Mahmoud RM, Ghorab RA, AbdelHakam DA, Fathi MESA, Wahed MAA, Mohey K, Ibrahim M, Hadidi ME, Masssoud YM, Salah M, Abugable A, Bahaa M, Khamisy SE, Meteini ME. Genomic landscape of hepatocellular carcinoma in Egyptian patients by whole exome sequencing. BMC Med Genomics 2024; 17:202. [PMID: 39123171 PMCID: PMC11311965 DOI: 10.1186/s12920-024-01965-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 07/17/2024] [Indexed: 08/12/2024] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is the most common primary liver cancer. Chronic hepatitis and liver cirrhosis lead to accumulation of genetic alterations driving HCC pathogenesis. This study is designed to explore genomic landscape of HCC in Egyptian patients by whole exome sequencing. METHODS Whole exome sequencing using Ion Torrent was done on 13 HCC patients, who underwent surgical intervention (7 patients underwent living donor liver transplantation (LDLT) and 6 patients had surgical resection}. RESULTS Mutational signature was mostly S1, S5, S6, and S12 in HCC. Analysis of highly mutated genes in both HCC and Non-HCC revealed the presence of highly mutated genes in HCC (AHNAK2, MUC6, MUC16, TTN, ZNF17, FLG, MUC12, OBSCN, PDE4DIP, MUC5b, and HYDIN). Among the 26 significantly mutated HCC genes-identified across 10 genome sequencing studies-in addition to TCGA, APOB and RP1L1 showed the highest number of mutations in both HCC and Non-HCC tissues. Tier 1, Tier 2 variants in TCGA SMGs in HCC and Non-HCC (TP53, PIK3CA, CDKN2A, and BAP1). Cancer Genome Landscape analysis revealed Tier 1 and Tier 2 variants in HCC (MSH2) and in Non-HCC (KMT2D and ATM). For KEGG analysis, the significantly annotated clusters in HCC were Notch signaling, Wnt signaling, PI3K-AKT pathway, Hippo signaling, Apelin signaling, Hedgehog (Hh) signaling, and MAPK signaling, in addition to ECM-receptor interaction, focal adhesion, and calcium signaling. Tier 1 and Tier 2 variants KIT, KMT2D, NOTCH1, KMT2C, PIK3CA, KIT, SMARCA4, ATM, PTEN, MSH2, and PTCH1 were low frequency variants in both HCC and Non-HCC. CONCLUSION Our results are in accordance with previous studies in HCC regarding highly mutated genes, TCGA and specifically enriched pathways in HCC. Analysis for clinical interpretation of variants revealed the presence of Tier 1 and Tier 2 variants that represent potential clinically actionable targets. The use of sequencing techniques to detect structural variants and novel techniques as single cell sequencing together with multiomics transcriptomics, metagenomics will integrate the molecular pathogenesis of HCC in Egyptian patients.
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Affiliation(s)
- Perihan Hamdy Kassem
- Clinical Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Iman Fawzy Montasser
- Tropical Medicine Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
| | - Ramy Mohamed Mahmoud
- Clinical Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Rasha Ahmed Ghorab
- Clinical Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Dina A AbdelHakam
- Clinical Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | | | - Marwa A Abdel Wahed
- Clinical Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Khaled Mohey
- Clinical Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mariam Ibrahim
- Pathology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mohamed El Hadidi
- Institute of Cancer and Genomic Sciences, College of Medical and Dental Sciences, University of Birmingham Dubai Campus, Dubai, United Arab Emirates
- Bioinformatics Group, Center for Informatics Science(CIS), School of Information Technology and Computer Science(ITCS), Nile University, Giza, Egypt
| | - Yasmine M Masssoud
- Tropical Medicine Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Manar Salah
- Tropical Medicine Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Arwa Abugable
- School of Biosciences, University of Sheffield, Sheffield, UK
| | - Mohamad Bahaa
- Hepato-Pancreatico-Biliary Surgery Department and liver Transplantation, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | | | - Mahmoud El Meteini
- Hepato-Pancreatico-Biliary Surgery Department and liver Transplantation, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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da Silva TF, de Azevedo JC, Teixeira EB, Casseb SMM, Moreira FC, de Assumpção PP, dos Santos SEB, Calcagno DQ. From haystack to high precision: advanced sequencing methods to unraveling circulating tumor DNA mutations. Front Mol Biosci 2024; 11:1423470. [PMID: 39165643 PMCID: PMC11333322 DOI: 10.3389/fmolb.2024.1423470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 07/11/2024] [Indexed: 08/22/2024] Open
Abstract
Identifying mutations in cancer-associated genes to guide patient treatments is essential for precision medicine. Circulating tumor DNA (ctDNA) offers valuable insights for early cancer detection, treatment assessment, and surveillance. However, a key issue in ctDNA analysis from the bloodstream is the choice of a technique with adequate sensitivity to identify low frequent molecular changes. Next-generation sequencing (NGS) technology, evolving from parallel to long-read capabilities, enhances ctDNA mutation analysis. In the present review, we describe different NGS approaches for identifying ctDNA mutation, discussing challenges to standardized methodologies, cost, specificity, clinical context, and bioinformatics expertise for optimal NGS application.
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Affiliation(s)
- Tamires Ferreira da Silva
- Programa de Residência Multiprofissional em Saúde (Oncologia), Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, Brazil
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, Brazil
| | - Juscelino Carvalho de Azevedo
- Programa de Residência Multiprofissional em Saúde (Oncologia), Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, Brazil
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, Brazil
| | | | | | | | | | | | - Danielle Queiroz Calcagno
- Programa de Residência Multiprofissional em Saúde (Oncologia), Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, Brazil
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, Brazil
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Aalam SMM, Nguyen LV, Ritting ML, Kannan N. Clonal tracking in cancer and metastasis. Cancer Metastasis Rev 2024; 43:639-656. [PMID: 37910295 DOI: 10.1007/s10555-023-10149-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 10/16/2023] [Indexed: 11/03/2023]
Abstract
The eradication of many cancers has proven challenging due to the presence of functionally and genetically heterogeneous clones maintained by rare cancer stem cells (CSCs), which contribute to disease progression, treatment refractoriness, and late relapse. The characterization of functional CSC activity has necessitated the development of modern clonal tracking strategies. This review describes viral-based and CRISPR-Cas9-based cellular barcoding, lineage tracing, and imaging-based approaches. DNA-based cellular barcoding technology is emerging as a powerful and robust strategy that has been widely applied to in vitro and in vivo model systems, including patient-derived xenograft models. This review also highlights the potential of these methods for use in the clinical and drug discovery contexts and discusses the important insights gained from such approaches.
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Affiliation(s)
| | - Long Viet Nguyen
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Megan L Ritting
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA
| | - Nagarajan Kannan
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA.
- Mayo Clinic Comprehensive Cancer Center, Mayo Clinic, Rochester, MN, USA.
- Center for Regenerative Biotherapeutics, Mayo Clinic, Rochester, MN, USA.
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Liu D, Yehia L, Dhawan A, Ni Y, Eng C. Cell-free DNA fragmentomics and second malignant neoplasm risk in patients with PTEN hamartoma tumor syndrome. Cell Rep Med 2024; 5:101384. [PMID: 38242121 PMCID: PMC10897513 DOI: 10.1016/j.xcrm.2023.101384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 11/01/2023] [Accepted: 12/20/2023] [Indexed: 01/21/2024]
Abstract
Individuals with PTEN hamartoma tumor syndrome (PHTS) harbor pathogenic germline PTEN variants that confer a significantly increased lifetime risk of various organ-specific cancers including second primary malignant neoplasms (SMNs). Currently, there are no reliable biomarkers that can predict individual-level cancer risk. Despite the highly promising value of cell-free DNA (cfDNA) as a biomarker for underlying sporadic cancers, the utility of cfDNA in individuals with known cancer-associated germline variants and subclinical cancers remains poorly understood. We perform ultra-low-pass whole-genome sequencing (ULP-WGS) of cfDNA from plasma samples from patients with PHTS and cancer as well as those without cancer. Analysis of cfDNA reveals that patients with PHTS and SMNs have distinct cfDNA size distribution, aberrant genome-wide fragmentation, and differential fragment end motif frequencies. Our work provides evidence that cfDNA profiles may be used as a marker for SMN risk in patients with PHTS.
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Affiliation(s)
- Darren Liu
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA
| | - Lamis Yehia
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Andrew Dhawan
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Rose Ella Burkhardt Brain Tumor and Neuro-Oncology Center, Cleveland Clinic, Cleveland, OH 44195, USA; Center for Personalized Genetic Healthcare, Medical Specialties Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Ying Ni
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA; Center for Immunotherapy and Precision Immuno-oncology, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH 44195, USA; Center for Personalized Genetic Healthcare, Medical Specialties Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Taussig Cancer Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; Germline High Risk Cancer Focus Group, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA.
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Erdem HB, Alay MT, Özdemir Z, Çevik E, Ateş Ö, Karaçin C, Şahin İ, Doğan M, Bahsi T. Higher TP53 somatic mutation prevalence from liquid biopsy analysis in ever smoker non-small-cell lung cancer patients. Mutat Res 2024; 828:111847. [PMID: 38071953 DOI: 10.1016/j.mrfmmm.2023.111847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/20/2023] [Accepted: 11/23/2023] [Indexed: 05/20/2024]
Abstract
OBJECTIVE Cigarette smoking is a primary risk factor, linked to 80% of LC deaths. TP53, a key gene, is implicated in various cancers, with TP53 alterations in 36.7% of cancers. This research aims to investigate TP53 mutations detected in NSCLC patients by liquid biopsy and explore the relationship between these mutations and smoking history. MATERIAL AND METHOD The study enrolled a total of 340 patients diagnosed with non-small cell lung cancer (NSCLC). For sequencing, the Illumina NextSeq 500 system was utilized. The oncogenicity of the variants was assessed according to the ClinGen/CGC/VICC SOP and the variants were categorized into four tiers according to AMP/ASCO/CAP. RESULTS The most common mutations were in TP53 (48.7%), followed by EGFR, PIK3CA, and PTEN. Missense mutations were frequent, with TP53 and EGFR having higher rates in ever-smokers. No indels or complex mutations were found in ever-smokers. Patient age ranged from 20 to 86 years. Tier I-II variants were more common in ever-smokers, while Tier III variants were prevalent in never-smokers. TP53 mutations were more frequent in ever-smokers, showing a strong association with smoking. Domain distribution showed differences in PIK3CA. Transversion/transition ratios varied by gene and smoking status. DISCUSSION The presence of TP53 mutations is strongly associated with both cigarette smoking and elevated Tv/Ti ratios. The tier status of TP53, EGFR, and PTEN variants does not show a specific domain distribution, but interesting associations are observed between the tier status and domain distribution in PIK3CA variants. Therefore, further comprehensive investigations are needed to explore this entity, as well as the underlying factors contributing to the increased Tv/Ti rates in the TP53 gene. Such research will provide deeper insights into the genetic alterations associated with smoking and tumor heterogeneity, ultimately aiding in the development of targeted therapies.
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Affiliation(s)
- Haktan Bağış Erdem
- Ankara Etlik City Hospital, Department of Medical Genetics, Ankara, Türkiye; University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Medical Genetics, Ankara, Türkiye.
| | - Mustafa Tarık Alay
- Ankara Etlik City Hospital, Department of Medical Genetics, Ankara, Türkiye
| | - Zeynep Özdemir
- Ankara Etlik City Hospital, Department of Medical Genetics, Ankara, Türkiye
| | - Ezgi Çevik
- Ankara Etlik City Hospital, Department of Medical Genetics, Ankara, Türkiye
| | - Öztürk Ateş
- University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Medical Oncology, Ankara, Türkiye
| | - Cengiz Karaçin
- University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Medical Oncology, Ankara, Türkiye
| | - İbrahim Şahin
- Arabian Gulf University Medical Faculty, Department of Medical Genetics, Manama, Bahrain
| | - Mutlu Doğan
- University of Health Sciences, Ankara Oncology Training and Research Hospital, Department of Medical Oncology, Ankara, Türkiye
| | - Taha Bahsi
- Ankara Etlik City Hospital, Department of Medical Genetics, Ankara, Türkiye
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陈 颖. [Research progress on circulating tumor DNA as a biomarker for minimal residual disease in solid tumors]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2023; 25:1072-1077. [PMID: 37905766 PMCID: PMC10621050 DOI: 10.7499/j.issn.1008-8830.2304040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 08/02/2023] [Indexed: 11/02/2023]
Abstract
Circulating tumor DNA (ctDNA) is emerging as a novel biomarker for tumor evaluation, offering advantages such as high sensitivity and specificity, minimal invasiveness, and absence of radiation. Currently, various techniques including gene sequencing and PCR are employed for ctDNA detection. The utilization of ctDNA for monitoring minimal residual disease (MRD) enables comprehensive assessment of tumor status and early identification of tumor recurrence, achieving a remarkable detection sensitivity of 0.01%. Therefore, ctDNA holds promise as a biomarker for early diagnosis, treatment response monitoring, and prognosis prediction in solid tumors. This article reviews the commonly used methods for detecting ctDNA and their advantages in evaluating tumor MRD and guiding clinical diagnosis and treatment.
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Affiliation(s)
- 颖 陈
- 汕头大学医学院深圳儿科临床学院,广东深圳518034
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Kim YN, Shim Y, Seo J, Choi Z, Lee YJ, Shin S, Kim SW, Kim S, Choi JR, Lee JY, Lee ST. Investigation of PARP Inhibitor Resistance Based on Serially Collected Circulating Tumor DNA in Patients With BRCA-Mutated Ovarian Cancer. Clin Cancer Res 2023; 29:2725-2734. [PMID: 37067525 DOI: 10.1158/1078-0432.ccr-22-3715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/27/2023] [Accepted: 04/13/2023] [Indexed: 04/18/2023]
Abstract
PURPOSE Patient-specific molecular alterations leading to PARP inhibitor (PARPi) resistance are relatively unexplored. In this study, we analyzed serially collected circulating tumor DNA (ctDNA) from patients with BRCA1/2 mutations who received PARPis to investigate the resistance mechanisms and their significance in postprogression treatment response and survival. EXPERIMENTAL DESIGN Patients were prospectively enrolled between January 2018 and December 2021 (NCT05458973). Whole-blood samples were obtained before PARPi administration and serially every 3 months until progression. ctDNA was extracted from the samples and sequenced with a 531-gene panel; gene sets for each resistance mechanism were curated. RESULTS Fifty-four patients were included in this analysis. Mutation profiles of genes in pre-PARPi samples indicating a high tumor mutational burden and alterations in genes associated with replication fork stabilization and drug efflux were associated with poor progression-free survival on PARPis. BRCA hypomorphism and reversion were found in 1 and 3 patients, respectively. Among 29 patients with matched samples, mutational heterogeneity increased postprogression on PARPis, showing at least one postspecific mutation in 89.7% of the patients. These mutations indicate non-exclusive acquired resistance mechanisms-homologous recombination repair restoration (28%), replication fork stability (34%), upregulated survival pathway (41%), target loss (10%), and drug efflux (3%). We observed poor progression-free survival with subsequent chemotherapy in patients with homologous recombination repair restoration (P = 0.003) and those with the simultaneous involvement of two or more resistance mechanisms (P = 0.040). CONCLUSIONS Analysis of serial ctDNAs highlighted multiple acquired resistance mechanisms, providing valuable insights for improving postprogression treatment and survival.
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Affiliation(s)
- Yoo-Na Kim
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yeeun Shim
- Department of Laboratory Medicine, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jieun Seo
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | | | - Yong Jae Lee
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Saeam Shin
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sang Wun Kim
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sunghoon Kim
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jong Rak Choi
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Dxome, Seoul, Republic of Korea
| | - Jung-Yun Lee
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seung-Tae Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
- Dxome, Seoul, Republic of Korea
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Koval AP, Khromova AS, Blagodatskikh KA, Zhitnyuk YV, Shtykova YA, Alferov AA, Kushlinskii NE, Shcherbo DS. Application of PCR-based approaches for evaluation of cell-free DNA fragmentation in colorectal cancer. Front Mol Biosci 2023; 10:1101179. [PMID: 37051326 PMCID: PMC10083340 DOI: 10.3389/fmolb.2023.1101179] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 03/14/2023] [Indexed: 03/29/2023] Open
Abstract
Cell-free DNA (cfDNA) testing is the core of most liquid biopsy assays. In particular, cfDNA fragmentation features could facilitate non-invasive cancer detection due to their interconnection with tumor-specific epigenetic alterations. However, the final cfDNA fragmentation profile in a purified sample is the result of a complex interplay between informative biological and artificial technical factors. In this work, we use ddPCR to study cfDNA lengths in colorectal cancer patients and observe shorter and more variable cfDNA fragments in accessible chromatin loci compared to the densely packed pericentromeric region. We also report a convenient qPCR system suitable for screening cfDNA samples for artificial high molecular weight DNA contamination.
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Affiliation(s)
- Anastasia P. Koval
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Alexandra S. Khromova
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
| | - Konstantin A. Blagodatskikh
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
- Center of Genetics and Reproductive Medicine “Genetico”, Moscow, Russia
| | - Yulia V. Zhitnyuk
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
| | | | - Aleksandr A. Alferov
- Laboratory of Clinical Biochemistry, N. N. Blokhin Cancer Research Medical Center of Oncology, Moscow, Russia
| | - Nikolay E. Kushlinskii
- Laboratory of Clinical Biochemistry, N. N. Blokhin Cancer Research Medical Center of Oncology, Moscow, Russia
| | - Dmitry S. Shcherbo
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia
- *Correspondence: Dmitry S. Shcherbo,
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Gezer U, Bronkhorst AJ, Holdenrieder S. The Clinical Utility of Droplet Digital PCR for Profiling Circulating Tumor DNA in Breast Cancer Patients. Diagnostics (Basel) 2022; 12:diagnostics12123042. [PMID: 36553049 PMCID: PMC9776872 DOI: 10.3390/diagnostics12123042] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/07/2022] Open
Abstract
Breast cancer is the most common cancer affecting women worldwide. It is a malignant and heterogeneous disease with distinct molecular subtypes, which has prognostic and predictive implications. Circulating tumor DNA (ctDNA), cell-free fragmented tumor-derived DNA in blood plasma, is an invaluable source of specific cancer-associated mutations and holds great promise for the development of minimally invasive diagnostic tests. Furthermore, serial monitoring of ctDNA over the course of systemic and targeted therapies not only allows unparalleled efficacy assessments but also enables the identification of patients who are at risk of progression or recurrence. Droplet digital PCR (ddPCR) is a powerful technique for the detection and monitoring of ctDNA. Due to its relatively high accuracy, sensitivity, reproducibility, and capacity for absolute quantification, it is increasingly used as a tool for managing cancer patients through liquid biopsies. In this review paper, we gauge the clinical utility of ddPCR as a technique for mutational profiling in breast cancer patients and focus on HER2, PIK3CA, ESR1, and TP53, which represent the most frequently mutated genes in breast cancers.
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Affiliation(s)
- Ugur Gezer
- Institute of Oncology, Department of Basic Oncology, Istanbul University, Istanbul 34093, Turkey
| | - Abel J. Bronkhorst
- Munich Biomarker Research Center, Institute of Laboratory Medicine, German Heart Center Munich Technical University Munich, 80636 München, Germany
| | - Stefan Holdenrieder
- Munich Biomarker Research Center, Institute of Laboratory Medicine, German Heart Center Munich Technical University Munich, 80636 München, Germany
- Correspondence:
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Cell-Free DNA Fragmentomics: A Promising Biomarker for Diagnosis, Prognosis and Prediction of Response in Breast Cancer. Int J Mol Sci 2022; 23:ijms232214197. [PMID: 36430675 PMCID: PMC9695769 DOI: 10.3390/ijms232214197] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/04/2022] [Accepted: 11/16/2022] [Indexed: 11/18/2022] Open
Abstract
Identifying novel circulating biomarkers predictive of response and informative about the mechanisms of resistance, is the new challenge for breast cancer (BC) management. The integration of omics information will gradually revolutionize the clinical approach. Liquid biopsy is being incorporated into the diagnostic and decision-making process for the treatment of BC, in particular with the analysis of circulating tumor DNA, although with some relevant limitations, including costs. Circulating cell-free DNA (cfDNA) fragmentomics and its integrity index may become a cheaper, noninvasive biomarker that could provide significant additional information for monitoring response to systemic treatments in BC. The purpose of our review is to focus on the available research on cfDNA integrity and its features as a biomarker of diagnosis, prognosis and response to treatments in BC, highlighting new perspectives and critical issues for future applications.
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