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Tay TKY, Tan GS, Lee SH, Sam XX, Lim TH, Ng JWK, Tan DSW, Lim TKH. Comparison of an amplicon-based large panel next generation sequencing (NGS) assay with conventional testing methods for MET and HER2 amplification in lung and breast cancers. Pathology 2024; 56:325-333. [PMID: 38195375 DOI: 10.1016/j.pathol.2023.10.011] [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: 03/02/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 01/11/2024]
Abstract
The frequency of MET and HER2 amplification being detected by next generation sequencing (NGS) is increasing due to NGS being increasingly adopted for molecular profiling of cancers. However, the accuracy of NGS in detecting these gene amplifications remains uncertain due to conflicting reports in the scientific literature. We studied the accuracy of an amplicon-based large panel NGS assay in detecting MET and HER2 amplification in lung and breast cancers, respectively, by comparing it against conventional testing methods. Amongst 48 lung cancers, four of five cancers that were MET amplified on fluorescence in situ hybridisation (FISH) were classified as amplified on NGS while 42 of the remaining 43 non-amplified cancers were classified as non-amplified on NGS, giving a sensitivity of 80%, specificity of 97.7% and overall concordance of 95.8%. Of the 46 breast cancers tested, only six of the nine cancers that were HER2-positive on immunohistochemistry (IHC)/FISH were HER2-positive on NGS, while all the remaining HER2-negative cases were negative on NGS, giving a sensitivity of 66.7%, specificity of 100% and overall concordance of 93.5%. All the false-negative cases had low level gene amplification (MET:CEP7 or HER2:CEP17 FISH ratio of <3). The low sensitivity for HER2 amplification may be confounded by the small sample size and disproportionate number of cases with low level amplification. In summary, the NGS assay has good concordance with conventional testing methods but may be less sensitive in detecting low level gene amplification.
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Affiliation(s)
- Timothy Kwang Yong Tay
- Department of Anatomical Pathology, Singapore General Hospital, Singapore; Department of Molecular Pathology, Singapore General Hospital, Singapore.
| | - Gek San Tan
- Department of Molecular Pathology, Singapore General Hospital, Singapore
| | - Say Hwee Lee
- Department of Molecular Pathology, Singapore General Hospital, Singapore
| | - Xin Xiu Sam
- Department of Anatomical Pathology, Singapore General Hospital, Singapore
| | - Tse Hui Lim
- Department of Molecular Pathology, Singapore General Hospital, Singapore
| | - Jeremy Wee Kiat Ng
- Department of Molecular Pathology, Singapore General Hospital, Singapore
| | | | - Tony Kiat Hon Lim
- Department of Anatomical Pathology, Singapore General Hospital, Singapore; Department of Molecular Pathology, Singapore General Hospital, Singapore
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Zhang Y, Wang J, Liu M, Ni Y, Yue Y, He D, Liu R. Magnetically induced self-assembly electrochemical biosensor with ultra-low detection limit and extended measuring range for sensitive detection of HER2 protein. Bioelectrochemistry 2024; 155:108592. [PMID: 37925821 DOI: 10.1016/j.bioelechem.2023.108592] [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: 08/17/2023] [Revised: 10/17/2023] [Accepted: 10/24/2023] [Indexed: 11/07/2023]
Abstract
An innovative electrochemical biosensor was fabricated for sensitive detection of human epidermal growth factor receptor 2 (HER2) protein, which was considered as an essential tumor marker for diagnosis and treatment evaluation of breast cancer. The sensor was constructed using Apt and PNA as recognition probes incorporated with magnetic Fe3O4/α-Fe2O3@Au nanocomposites. The sensing strategy was designed to lower the detection limit of HER2, and avoid the large steric interference caused by macromolecular HER2 on the electrode surface. Rigid structure dsDNA (Apt/ssDNA) was designed to improve the sensitivity of the sensor. Apt captured the macromolecular HER2 protein, and ssDNA chains were simultaneously released, causing a sensitive change in the electrochemical signal. PNA captured the released ssDNA chains, which converted the electrochemical signal changes caused by HER2 to those caused by the number of short strand ssDNA, so the detection range was extended. Under optimized conditions, this sensing strategy realized an ultra-low detection LOD of HER2 (4.1 fg·mL-1), and the detection range was 10 fg·mL-1-5 × 106 fg·mL-1. The experimental results confirmed that the electrochemical biosensor had excellent selectivity, reproducibility, and storage stability. Analysis of spiked serum samples exhibited a recovery rate of 95.9-115.7 %, which indicated great promise for HER2 detection in serum samples.
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Affiliation(s)
- Yanling Zhang
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Jie Wang
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Min Liu
- The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang 212300, PR China
| | - Yun Ni
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Yao Yue
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Dawei He
- Affiliated Kunshan Hospital, Jiangsu University, Suzhou 215300, PR China.
| | - Ruijiang Liu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China.
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Zhu M, Benson AB. An update on pharmacotherapies for colorectal cancer: 2023 and beyond. Expert Opin Pharmacother 2024; 25:91-99. [PMID: 38224000 DOI: 10.1080/14656566.2024.2304654] [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: 10/03/2023] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Abstract
INTRODUCTION Colorectal cancer (CRC) is one of the most prevalent and lethal cancers worldwide. The treatment of metastatic colorectal cancer (mCRC) is difficult, and mCRC has a survival rate of only 13-17% compared with 70-90% in locoregional CRC. There is ongoing research effort on pharmacotherapy for CRC to improve the treatment outcome. AREAS COVERED We reviewed the current literature and ongoing clinical trials on CRC pharmacotherapy, with a focus on targeted therapy based on the results of genetic testing. The pharmacotherapies covered in this article include novel agents targeting EGFR and EGFR-related pathways, agents targeting the VEGF pathway, immunotherapy options depending on the MMR/MSI status, and new therapies targeting genetic fusions such as NTRK. We also briefly discuss the value of next-generation sequencing (NGS) in treatment selection and response monitoring. EXPERT OPINION We advocate for the early and routine use of NGS to genetically characterize CRC to assist with pharmacotherapy selection. Targeted therapy is a promising field of ongoing research and improves CRC treatment outcome.
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Affiliation(s)
- Mengou Zhu
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Al B Benson
- Department of Medicine, Division of Hematology and Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL, USA
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Li J, Li X, Quan C, Li X, Wan C, Wu X. Genomic profile of Chinese patients with endometrial carcinoma. BMC Cancer 2023; 23:888. [PMID: 37730563 PMCID: PMC10512642 DOI: 10.1186/s12885-023-11382-4] [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: 04/04/2023] [Accepted: 09/06/2023] [Indexed: 09/22/2023] Open
Abstract
BACKGROUNDS Endometrial carcinoma (EC) is one of the most commonly diagnosed gynecologic malignancy in China. However, the genetic profile of Chinese EC patients has not been well established yet. METHODS In current study, 158 Chinese EC patients were subjected to next-generation sequencing assay (74 took testing of EC-related 20-genes panel, and 84 took the expanded panel). Of the 158 patients, 91 patients were performed germline mutation testing using the expanded panel. Moreover, the public datasets from TCGA and MSKCC were utilized to compare the genomic differences between Chinese and Western EC patients. The proteomic and transcriptomic from CPTAC and TCGA were derived and performed unsupervised clustering to identify molecular subtypes. RESULTS Among the 158 patients analyzed, a significant majority (85.4%) exihibited at least one somatic alteration, with the most prevalent alterations occurring in PTEN, PIK3CA, TP53, and ARID1A. These genomic alterations were mainly enriched in the PI3K, cell cycle, RAS/RAF/MAPK, Epigenetic modifiers/Chromatin remodelers, and DNA damage repair (DDR) signaling pathways. Additionally, we identified ten individuals (11.0%) with pathogenic or likely pathogenic germline alterations in seven genes, with the DDR pathway being predominantly involved. Compared to Western EC patients, Chinese EC patients displayed different prevalence in AKT1, MET, PMS2, PIK3R1, and CTCF. Notably, 69.6% of Chinese EC patients were identified with actionable alterations. In addition, we discovered novel molecular subtypes in ARID1A wild-type patients, characterized by an inferior prognosis, higher TP53 but fewer PTEN and PIK3CA alterations. Additionally, this subtype exhibited a significantly higher abundance of macrophages and activated dendritic cells. CONCLUSION Our study has contributed valuable insights into the unique germline and somatic genomic profiles of Chinese EC patients, enhancing our understanding of their biological characteristics and potential therapeutic avenues. Furthermore, we have highlighted the presence of molecular heterogeneity in ARID1A-wild type EC patients, shedding light on the complexity of this subgroup.
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Affiliation(s)
- Jin Li
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, 200032, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, 200032, Shanghai, China
| | - Xiaoqi Li
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, 200032, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, 200032, Shanghai, China
| | - Chenlian Quan
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, 200032, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, 200032, Shanghai, China
| | - Xiaoqiu Li
- Department of Pathology, Fudan University Shanghai Cancer Center, Fudan University, 200032, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, 200032, Shanghai, China
| | - Chong Wan
- Precision Medicine Center, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, China
| | - Xiaohua Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, 200032, Shanghai, China.
- Department of Oncology, Shanghai Medical College, Fudan University, 200032, Shanghai, China.
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Kumaki Y, Oda G, Ikeda S. Targeting MET Amplification: Opportunities and Obstacles in Therapeutic Approaches. Cancers (Basel) 2023; 15:4552. [PMID: 37760522 PMCID: PMC10526812 DOI: 10.3390/cancers15184552] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/01/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
The MET gene plays a vital role in cellular proliferation, earning it recognition as a principal oncogene. Therapies that target MET amplification have demonstrated promising results both in preclinical models and in specific clinical cases. A significant obstacle to these therapies is the ability to distinguish between focal amplification and polysomy, a task for which simple MET copy number measurement proves insufficient. To effectively differentiate between the two, it is crucial to utilize comparative measures, including in situ hybridization (ISH) with the centromere or next generation sequencing (NGS) with adjacent genes. Despite the promising potential of MET amplification treatment, the judicious selection of patients is paramount to maximize therapeutic efficacy. The effectiveness of MET inhibitors can fluctuate depending on the extent of MET amplification. Future research must seek to establish the ideal threshold value for MET amplification, identify the most efficacious combination therapies, and innovate new targeted treatments for patients exhibiting MET amplification.
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Affiliation(s)
- Yuichi Kumaki
- Department of Specialized Surgery, Tokyo Medical and Dental University, Tokyo 113-8519, Japan;
| | - Goshi Oda
- Department of Specialized Surgery, Tokyo Medical and Dental University, Tokyo 113-8519, Japan;
| | - Sadakatsu Ikeda
- Center for Innovative Cancer Treatment, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92037, USA
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Reyes A, Pharaon R, Mohanty A, Massarelli E. Arising Novel Agents in Lung Cancer: Are Bispecifics and ADCs the New Paradigm? Cancers (Basel) 2023; 15:3162. [PMID: 37370772 DOI: 10.3390/cancers15123162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Lung cancer is one of the most common cancers with the highest mortality. Non-small cell lung cancer (NSCLC) contributes to around 85% of lung cancer diagnoses (vs. 15% for small cell lung cancer). The treatment of NSCLC has vastly changed in the last two decades since the development of immunotherapy and targeted therapy against driver mutations. As is the nature of malignancy, cancer cells have acquired resistance to these treatments prompting an investigation into novel treatments and new targets. Bispecific antibodies, capable of targeting multiple substrates at once, and antibody-drug conjugates that can preferentially deliver chemotherapy to tumor cells are examples of this innovation. From our initial evaluation, both treatment modalities appear promising.
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Affiliation(s)
- Amanda Reyes
- Department of Medical Oncology & Therapeutics Research, City of Hope National Medical Center, Duarte, CA 910102, USA
| | - Rebecca Pharaon
- Department of Medical Oncology & Therapeutics Research, City of Hope National Medical Center, Duarte, CA 910102, USA
| | - Atish Mohanty
- Department of Medical Oncology & Therapeutics Research, City of Hope National Medical Center, Duarte, CA 910102, USA
| | - Erminia Massarelli
- Department of Medical Oncology & Therapeutics Research, City of Hope National Medical Center, Duarte, CA 910102, USA
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