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Masuda T, Miura S, Sato Y, Tachihara M, Bessho A, Nakamura A, Miyawaki T, Yoshimine K, Mori M, Shiraishi H, Hamai K, Haratani K, Maeda S, Tabata E, Kitagawa C, Tanizaki J, Imai T, Nogami S, Yamamoto N, Nakagawa K, Hattori N. Significance of micro-EGFR T790M mutations on EGFR-tyrosine kinase inhibitor efficacy in non-small cell lung cancer. Sci Rep 2023; 13:19729. [PMID: 37957228 PMCID: PMC10643699 DOI: 10.1038/s41598-023-45337-3] [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: 05/13/2023] [Accepted: 10/18/2023] [Indexed: 11/15/2023] Open
Abstract
Small amounts of epidermal growth factor receptor (EGFR) T790M mutation (micro-T790M), which is detected using droplet digital PCR (ddPCR) but not conventional PCR, in formalin-fixed and paraffin-embedded (FFPE) samples have been investigated as a predictive factor for the efficacy of EGFR-tyrosine kinase inhibitors (TKIs). However, the predictive value of micro-T790M remains controversial, possibly owing to the failure to examine artificial T790M in FFPE specimens. Therefore, we examined the predictive value of micro-T790M in first-generation (1G), second-generation (2G), and third-generation (3G) EGFR-TKI efficacy using a new method to exclude FFPE-derived artificial mutations in our retrospective cohort. The primary objective was time to treatment failure (TTF) of 1G, 2G, and 3G EGFR-TKIs according to micro-T790M status. In total, 315 patients with EGFR-positive non-small cell lung cancer treated with 1G, 2G, and 3G EGFR-TKIs were included in this study. The proportion of patients positive for micro-T790M in the 1G, 2G, and 3G EGFR-TKI groups was 48.2%, 47.1%, and 47.6%, respectively. In the micro-T790M-positive group, the TTF was significantly longer in the 2G and 3G EGFR-TKI groups than in the 1G TKI group. No differences in the micro-T790M-negative group were observed. Micro-T790M status detected using ddPCR, eliminating false positives, may be a valuable predictor of EGFR-TKI efficacy.
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Affiliation(s)
- Takeshi Masuda
- Department of Respiratory Medicine, Hiroshima University Hospital, Hiroshima, 734-8551, Japan
| | - Satoru Miura
- Department of Internal Medicine, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-cho, Niigata, 951-8566, Japan.
| | - Yuki Sato
- Department of Respiratory Medicine, Kobe City Medical Center General Hospital, Kobe, 650-0047, Japan
| | - Motoko Tachihara
- Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, 650-0017, Japan
| | - Akihiro Bessho
- Department of Respiratory Medicine, Japanese Red Cross Okayama Hospital, Okayama, 700-8607, Japan
| | - Atsushi Nakamura
- Department of Pulmonary Medicine, Sendai Kousei Hospital, Sendai, 980-0873, Japan
| | - Taichi Miyawaki
- Division of Thoracic Oncology, Shizuoka Cancer Center, Shunto-gun, 411-8777, Japan
| | - Kohei Yoshimine
- Department of Respiratory Medicine, Iizuka Hospital, Iizuka, 820-8505, Japan
| | - Masahide Mori
- Department of Thoracic Oncology, National Hospital Organization, Osaka Toneyama Medical Center, Toyonaka, 560-8552, Japan
| | - Hideaki Shiraishi
- Department of Respiratory Medicine, Mitsui Memorial Hospital, Tokyo, 101-8643, Japan
| | - Kosuke Hamai
- Department of Respiratory Medicine, Hiroshima Prefectural Hospital, Hiroshima, 734-8530, Japan
| | - Koji Haratani
- Department of Medical Oncology, Kindai University Faculty of Medicine, Osakasayama, 589-8511, Japan
| | - Sumiko Maeda
- Department of General Thoracic Surgery, Dokkyo Medical University, Shimotsuga-gun, 321-0293, Japan
| | - Eriko Tabata
- Department of Respiratory Medicine, Ikeda City Hospital, Ikeda, 563-8510, Japan
| | - Chiyoe Kitagawa
- Department of Respiratory Medicine and Medical Oncology, National Hospital Organization Nagoya Medical Center, Nagoya, 460-0001, Japan
| | - Junko Tanizaki
- Department of Medical Oncology, Kishiwada City Hospital, Kishiwada, 596-8501, Japan
| | - Takumi Imai
- Department of Medical Statistics, Osaka Metropolitan University Graduate School of Medicine, Osaka, 558-8585, Japan
| | - Shohei Nogami
- Department of Genome Analysis, LSI Medience Corporation, Tokyo, 174-8555, Japan
| | - Nobuyuki Yamamoto
- Department of Internal Medicine III, Wakayama Medical University, Wakayama, 641-8509, Japan
| | - Kazuhiko Nakagawa
- Department of Medical Oncology, Kindai University Faculty of Medicine, Osakasayama, 589-8511, Japan
| | - Noboru Hattori
- Department of Respiratory Medicine, Hiroshima University Hospital, Hiroshima, 734-8551, Japan
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Ren Y, Cao L, You M, Ji J, Gong Y, Ren H, Xu F, Guo H, Hu J, Li Z. “SMART” digital nucleic acid amplification technologies for lung cancer monitoring from early to advanced stages. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Simarro J, Pérez-Simó G, Mancheño N, Ansotegui E, Muñoz-Núñez CF, Gómez-Codina J, Juan Ó, Palanca S. Technical Validation and Clinical Implications of Ultrasensitive PCR Approaches for EGFR-Thr790Met Mutation Detection in Pretreatment FFPE Samples and in Liquid Biopsies from Non-Small Cell Lung Cancer Patients. Int J Mol Sci 2022; 23:ijms23158526. [PMID: 35955661 PMCID: PMC9369170 DOI: 10.3390/ijms23158526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/29/2022] [Accepted: 07/30/2022] [Indexed: 02/04/2023] Open
Abstract
In pretreatment tumor samples of EGFR-mutated non-small cell lung cancer (NSCLC) patients, EGFR-Thr790Met mutation has been detected in a variable prevalence by different ultrasensitive assays with controversial prognostic value. Furthermore, its detection in liquid biopsy (LB) samples remains challenging, being hampered by the shortage of circulating tumor DNA (ctDNA). Here, we describe the technical validation and clinical implications of a real-time PCR with peptide nucleic acid (PNA-Clamp) and digital droplet PCR (ddPCR) for EGFR-Thr790Met detection in diagnosis FFPE samples and in LB. Limit of blank (LOB) and limit of detection (LOD) were established by analyzing negative and low variant allele frequency (VAF) FFPE and LB specimens. In a cohort of 78 FFPE samples, both techniques showed an overall agreement (OA) of 94.20%. EGFR-Thr790Met was detected in 26.47% of cases and was associated with better progression-free survival (PFS) (16.83 ± 7.76 vs. 11.47 ± 1.83 months; p = 0.047). In LB, ddPCR was implemented in routine diagnostics under UNE-EN ISO 15189:2013 accreditation, increasing the detection rate of 32.43% by conventional methods up to 45.95%. During follow-up, ddPCR detected EGFR-Thr790Met up to 7 months before radiological progression. Extensively validated ultrasensitive assays might decipher the utility of pretreatment EGFR-Thr790Met and improve its detection rate in LB studies, even anticipating radiological progression.
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Affiliation(s)
- Javier Simarro
- Molecular Biology Unit, Service of Clinical Analysis, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain; (J.S.); (G.P.-S.)
- Clinical and Translational Cancer Research Group, Instituto de Investigación Sanitaria La Fe (IIS La Fe), 46026 Valencia, Spain
| | - Gema Pérez-Simó
- Molecular Biology Unit, Service of Clinical Analysis, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain; (J.S.); (G.P.-S.)
- Clinical and Translational Cancer Research Group, Instituto de Investigación Sanitaria La Fe (IIS La Fe), 46026 Valencia, Spain
| | - Nuria Mancheño
- Pathology Department, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain;
| | - Emilio Ansotegui
- Pulmonology Department, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain;
| | | | - José Gómez-Codina
- Medical Oncology Department, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain; (J.G.-C.); (Ó.J.)
| | - Óscar Juan
- Medical Oncology Department, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain; (J.G.-C.); (Ó.J.)
| | - Sarai Palanca
- Molecular Biology Unit, Service of Clinical Analysis, Hospital Universitario y Politécnico La Fe, 46026 Valencia, Spain; (J.S.); (G.P.-S.)
- Clinical and Translational Cancer Research Group, Instituto de Investigación Sanitaria La Fe (IIS La Fe), 46026 Valencia, Spain
- Biochemistry and Molecular Biology Department, Universidad de Valencia, 46010 Valencia, Spain
- Correspondence: ; Tel.: +34-961-244586
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Matsumoto Y, Kawaguchi T, Watanabe M, Isa SI, Ando M, Tamiya A, Kubo A, Kitagawa C, Yoshimoto N, Koh Y. Prognostic impact of pretreatment T790M mutation on outcomes for patients with resected, EGFR-mutated, non-small cell lung cancer. BMC Cancer 2022; 22:775. [PMID: 35840951 PMCID: PMC9288048 DOI: 10.1186/s12885-022-09869-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 07/08/2022] [Indexed: 11/20/2022] Open
Abstract
Background Many previous studies have demonstrated that minor-frequency pretreatment T790M mutation (preT790M) could be detected by ultrasensitive methods in a considerable number of treatment-naïve, epidermal growth factor receptor (EGFR)-mutated, non-small cell lung cancer (NSCLC) cases. However, the impact of preT790M in resected cases on prognosis remains unclear. Methods We previously reported that preT790M could be detected in 298 (79.9%) of 373 surgically resected, EGFR-mutated NSCLC patients. Therefore, we investigated the impact of preT790M on recurrence-free survival (RFS) and overall survival (OS) in this cohort by multivariate analysis. All patients were enrolled from July 2012 to December 2013, with follow-up until November 30, 2017. Results The median follow-up time was 48.6 months. Using a cutoff value of the median preT790M allele frequency, the high-preT790M group (n = 151) had significantly shorter RFS (hazard ratio [HR] = 1.51, 95% confidence interval [CI]: 1.01–2.25, P = 0.045) and a tendency for a shorter OS (HR = 1.87, 95% CI: 0.99–3.55, P = 0.055) than the low-preT790M group (n = 222). On multivariate analysis, higher preT790M was independently associated with shorter RFS (high vs low, HR = 1.56, 95% CI: 1.03–2.36, P = 0.035), irrespective of advanced stage, older age, and male sex, and was also associated with shorter OS (high vs low, HR = 2.16, 95% CI: 1.11–4.20, P = 0.024) irrespective of advanced stage, older age, EGFR mutation subtype, and history of adjuvant chemotherapy. Conclusions Minor-frequency, especially high-abundance of, preT790M was an independent factor associated with a poor prognosis in patients with surgically resected, EGFR-mutated NSCLC. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-09869-7.
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Affiliation(s)
- Yoshiya Matsumoto
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Tomoya Kawaguchi
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Masaru Watanabe
- Internal Medicine III, Wakayama Medical University, Wakayama, Japan
| | - Shun-Ichi Isa
- Clinical Research Center, National Hospital Organization Kinki-chuo Chest Medical Center, Sakai, Japan
| | - Masahiko Ando
- Advanced Medicine and Clinical Research, Nagoya University Hospital, Nagoya, Japan
| | - Akihiro Tamiya
- Internal Medicine, National Hospital Organization Kinki-chuo Chest Medical Center, Sakai, Japan
| | - Akihito Kubo
- Division of Respiratory Medicine and Allergology, Department of Internal Medicine, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Chiyoe Kitagawa
- Medical Oncology and Respiratory Medicine, Nagoya Medical Center, Nagoya, Japan
| | - Naoki Yoshimoto
- Respiratory Medicine, Ishikiriseiki Hospital, Higashiosaka, Japan
| | - Yasuhiro Koh
- Internal Medicine III, Wakayama Medical University, Wakayama, Japan. .,Center for Biomedical Sciences, CIMS, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-8509, Japan.
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Wang X, Li X, Guo H, Zhu L, Peng Z, Wang J, Yang F, Guo Y. Highly Sensitive Droplet Digital PCR Method for Detection of de novo EGFR T790M Mutation in Patients with Non-Small Cell Lung Cancer. Onco Targets Ther 2020; 13:10621-10630. [PMID: 33116639 PMCID: PMC7588301 DOI: 10.2147/ott.s267677] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 09/23/2020] [Indexed: 12/15/2022] Open
Abstract
Objective The aim of this study was to investigate the allelic relation between de novo T790M and concomitant sensitizing EGFR mutations in EGFR-TKIs naïve NSCLCs and to explore whether the formalin-fixed and paraffin-embedded (FFPE) materials affect the detection of de novo EGFR T790M mutation. Methods Specimens of 300 consecutive EGFR-TKI naïve NSCLCs who received surgical resection between January 2016 and June 2018 were retrospectively investigated. All the snap-frozen tumor tissues from 300 NSCLCs were screened by droplet digital PCR (ddPCR) for the detection of de novo T790M mutation. The allelic relation between de novo T790M mutation and concomitant sensitizing EGFR mutations was also investigated. Furthermore, we assessed de novo T790M mutation in paired FFPE specimens of 50 patients which included tumor tissues and paired normal lung tissues of the pretreatment NSCLCs to investigate whether FFPE materials affect the detection of de novo T790M mutation. Results The de novo T790M mutation was observed in four patients which included one patient of single de novo T790M mutation and three patients of de novo T790M mutation coexisting with L858R mutation. The incidence of de novo T790M in pretreatment NSCLCs who harboring EGFR mutations was 2.9% (4/139). All the de novo T790M mutations were detected in cis with the concomitant L858R mutations for the three NSCLCs. Our ddPCR method demonstrated that the frequency of de novo T790M mutation was ranging from 0.1% to 0.5% among 90% (45/50) of the FFPE tumor samples and 92% (46/50) of the paired FFPE adjacent normal lung samples. The frequency of de novo T790M mutation in the paired snap-frozen samples was all below 0.1%. Conclusion Our study demonstrated that most de novo T790M mutations were detected in cis with concomitant sensitizing mutations for pretreatment NSCLCs. Analytical cut-off of ddPCR assay for FFPE specimens should be validated carefully considering the possibility of FFPE-derived artificial gene mutations.
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Affiliation(s)
- Xun Wang
- Department of Thoracic Surgery, Peking University People's Hospital, Peking University, Beijing 100044, People's Republic of China
| | - Xiao Li
- Department of Thoracic Surgery, Peking University People's Hospital, Peking University, Beijing 100044, People's Republic of China
| | - Haifa Guo
- Department of Thoracic Surgery, Peking University People's Hospital, Peking University, Beijing 100044, People's Republic of China
| | - Lingxiang Zhu
- National Research Institute for Health and Family Planning, Beijing 100081, People's Republic of China
| | - Zhiyong Peng
- TargetingOne Corporation, Beijing 100190, People's Republic of China
| | - Jun Wang
- Department of Thoracic Surgery, Peking University People's Hospital, Peking University, Beijing 100044, People's Republic of China
| | - Fan Yang
- Department of Thoracic Surgery, Peking University People's Hospital, Peking University, Beijing 100044, People's Republic of China
| | - Yong Guo
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, Beijing 100084, People's Republic of China
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Ye L, Mesbah Ardakani N, Thomas C, Spilsbury K, Leslie C, Amanuel B, Millward M. Detection of Low-level EGFR c.2369 C > T (p.Thr790Met) Resistance Mutation in Pre-treatment Non-small Cell Lung Carcinomas Harboring Activating EGFR Mutations and Correlation with Clinical Outcomes. Pathol Oncol Res 2020; 26:2371-2379. [PMID: 32506395 DOI: 10.1007/s12253-020-00833-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/07/2020] [Accepted: 05/26/2020] [Indexed: 11/25/2022]
Abstract
Increasing evidence points to the presence of low-level de novo T790M mutations in patients with non-small cell lung carcinoma (NSCLC) harboring activating EGFR mutations. We utilized digital PCR (dPCR), a highly sensitive gene mutation detection method, to detect pre-treatment T790M mutations in NSCLC tumor samples and correlated the T790M status with clinical features and patient outcomes. DNA extracted from pre-treatment NSCLC tumor tissue with known activating EGFR mutations, diagnosed between October 2010 and May 2017 at PathWest laboratory, was used to perform targeted dPCR for quantitative detection of T790M mutations. T790M was detected in 42 of 109 pre-treatment samples (38.5%). Median variant allele frequency was 0.14% (range 0.02-28.5%). Overall response rate to first generation EGFR tyrosine kinase inhibitors (TKI) was 67% regardless of T790M status. The median progression free survival was 10.7 (IQR 5.6-19.9) versus 6.7 (IQR 3.5-20.8) months in T790M negative and positive patients respectively. T790M positivity correlated with increased rate of early disease progression. It also correlated with increased mortality (HR 3.1 95%CI 1.2-8.1, p = 0.022) in patients who did not respond to TKI treatment. We detected a significant rate of low-level pre-treatment T790M mutations in NSCLC using highly sensitive dPCR. Low-level pre-treatment T790M did not impact treatment response rate or overall survival, but was associated with increased rate of early progression on TKI therapy.
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Affiliation(s)
- Linda Ye
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
- Faculty of Health and Medical Sciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Nima Mesbah Ardakani
- School of Pathology and Laboratory Medicine, The University of Western Australia, Crawley, Western Australia, Australia.
- Department of Anatomical Pathology, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, 6009, Australia.
- School of Veterinary and Life Science, Murdoch University, Perth, Western Australia, Australia.
| | - Carla Thomas
- School of Pathology and Laboratory Medicine, The University of Western Australia, Crawley, Western Australia, Australia
- Department of Anatomical Pathology, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, 6009, Australia
| | - Katrina Spilsbury
- Institute for Health Research, The University of Notre Dame Australia, Perth, Western Australia, Australia
| | - Connull Leslie
- School of Pathology and Laboratory Medicine, The University of Western Australia, Crawley, Western Australia, Australia
- Department of Anatomical Pathology, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, 6009, Australia
| | - Benhur Amanuel
- School of Pathology and Laboratory Medicine, The University of Western Australia, Crawley, Western Australia, Australia
- Department of Anatomical Pathology, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, 6009, Australia
- School of Medical Science, Edith Cowan University, Joondalup, WA, Australia
| | - Michael Millward
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
- Faculty of Health and Medical Sciences, The University of Western Australia, Crawley, Western Australia, Australia
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Wang X, Zhong D. [Advanced Research on Non-small Cell Lung Cancer with De Novo T790M Mutation]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2019; 22:324-328. [PMID: 31109443 PMCID: PMC7665962 DOI: 10.3779/j.issn.1009-3419.2019.05.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
随着检测技术的发展,原发T790M突变检出率不断增加,三代表皮生长因子受体(epidermal growth factor receptor, EGFR)酪氨酸激酶抑制剂(tyrosine kinase inhibitors, TKIs)出现为其提供治疗机会。临床常重视继发T790M突变,而对原发T790M突变忽视或关注度不够。本综述发现原发T790M突变发生率波动大,主要受检测技术影响。原发T790M突变丰度多较低,易合并其他基因改变,是不良的预测和预后指标,一代和二代EGFR-TKIs疗效欠佳,奥希替尼的治疗价值有待研究。
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Affiliation(s)
- Xin Wang
- Department of Medical Oncology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Diansheng Zhong
- Department of Medical Oncology, Tianjin Medical University General Hospital, Tianjin 300052, China
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Falla-Martinez JC, Espinosa D, Baena JC, Rodriguez LX, Sua LF, Zambrano AR. An endothelial growth factor receptor compound mutation of T790M substitution with exon 19 deletion in a previously untreated patient: a case report. J Med Case Rep 2019; 13:144. [PMID: 31088573 PMCID: PMC6518648 DOI: 10.1186/s13256-019-2075-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 04/08/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Endothelial growth factor receptor (EGFR) mutations are an essential driver of personalized therapy for patients with lung cancer and are detected in approximately 15% of Caucasian and 50% of Asian patients. EGFR tyrosine kinase inhibitors have been developed and used for this set of patients. T790M mutation in exon 20 is usually associated with secondary resistance to EGFR tyrosine kinase inhibitors therapy but is also present in treatment-naïve patients. The frequency for baseline T790M mutation varies from 4 to 35% according to the detection method used. Newer techniques have yielded higher rates, but concerns about false-positive results have been raised. Compound mutations account for 4-14% of all EGFR-mutated tumors, with no studies yet to provide a frequency rate for T790M + 19 deletion association due to the small number of cases. However, there are reports that pretreatment T790M + L858R association is significantly more frequent compared to T790M + exon 19 deletion mutations. Diagnostic challenges, current knowledge on the subject, and therapeutic decisions are discussed. CASE PRESENTATION We present the case of a 43-year-old Hispanic woman, a treatment-naïve patient, with metastasized lung cancer adenocarcinoma harboring a T790M deletion along with the classic 19 mutation. The initial symptoms were monoparesis of her left leg, associated with hyperreflexia, and hypoesthesia. In the absence of third-generation tyrosine kinase inhibitors, a platinum-based therapy was initiated with no response and she died 4 months after diagnosis. CONCLUSIONS Osimertinib seems to be a suitable therapy for treatment-naïve patients with sensitizing and resistant compound EGFR mutations. More studies regarding the clinical characteristics of these patients and the appropriate management of this condition are needed to provide the highest standard of care.
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Affiliation(s)
- Juan C Falla-Martinez
- Hematology-Oncology department, Fundacion Valle del Lili, Carrera 98 No. 18-49, Fundacion Valle del Lili, Cali, Colombia
| | - Daniela Espinosa
- Internal Medicine department, Fundacion Valle del Lili, Carrera 98 No. 18-49, Cali, Colombia
| | - Juan C Baena
- Hematology-Oncology department, Fundacion Valle del Lili, Carrera 98 No. 18-49, Fundacion Valle del Lili, Cali, Colombia
| | - Lisa X Rodriguez
- Human Genetics department, Fundacion Valle del Lili, Carrera 98 No. 18-49, Cali, Colombia
| | - Luz F Sua
- Pathology department, Fundacion Valle del Lili, Carrera 98 No. 18-49, Cali, Colombia
| | - Angela R Zambrano
- Hematology-Oncology department, Fundacion Valle del Lili, Carrera 98 No. 18-49, Fundacion Valle del Lili, Cali, Colombia.
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Vendrell JA, Mazieres J, Senal R, Rouquette I, Quantin X, Pujol JL, Roch B, Bouidioua A, Godreuil S, Coyaud E, Brousset P, Solassol J. Ultra-sensitive EGFR T790M Detection as an Independent Prognostic Marker for Lung Cancer Patients Harboring EGFR del19 Mutations and Treated with First-generation TKIs. Clin Cancer Res 2019; 25:4280-4289. [PMID: 30936123 DOI: 10.1158/1078-0432.ccr-18-2683] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 12/20/2018] [Accepted: 03/28/2019] [Indexed: 11/16/2022]
Abstract
PURPOSE The detection of preexisting EGFR T790M subclones and the assessment of their clinical significance in the pretreatment of patients with EGFR T790M non-small cell lung cancer (NSCLC) remain unclear. EXPERIMENTAL DESIGN A total of 179 tumor samples from patients treated or not with a first-generation tyrosine kinase inhibitor (TKI) was analyzed. The presence of ultra-low levels of preexisting EGFRT790M mutation was evaluated using ultra-sensitive droplet digital PCR (ddPCR) and the clinical implication of these mutations on first-generation TKI efficiency assessed. RESULTS With a ddPCR linear performance of 0.999 and an analytical sensitivity of approximately 0.001%, we observed a 66% (99/150) overall incidence of ultra-low EGFR T790M mutation. Among 82 patients harboring EGFR activating mutations, the presence of a preexisting EGFR T790M mutation prior to any treatment was significantly associated with a longer progression-free survival (PFS; P = 0.009; log-rank test). Interestingly, longer PFS was linked to concomitant EGFR del19 and ultra-low EGFR T790M mutations. Moreover, the presence of both EGFR del19 and ultra-low EGFR T790M mutations was identified as the best fit for predicting the clinical outcome of patients treated with TKI compared with an ultra-low EGFR T790M mutation status or an activating mutation alone (P = 0.042 and P = 0.0071, respectively). CONCLUSIONS We demonstrate that the detection of the ultra-low EGFR T790M mutation in TKI-naïve patients is not a rare event. We suggest that ddPCR should be used in clinical practice to distinguish patients who may respond to first- or third-generation TKIs.
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Affiliation(s)
- Julie A Vendrell
- Département de Pathologie et Oncobiologie, Laboratoire de Biologie des Tumeurs Solides, CHU Montpellier, Univ. Montpellier, Montpellier, France
| | - Julien Mazieres
- Département d'Oncologie Thoracique, Hôpital Larrey, CHU Toulouse, Toulouse, France
| | - Romain Senal
- Laboratoire de Biopathologie, Institut du Cancer de Montpellier (ICM), Montpellier, France
| | - Isabelle Rouquette
- Laboratoire de Pathologie Moléculaire, Institut Universitaire du Cancer Toulouse Oncopôle, CHU de Toulouse, Toulouse, France
| | - Xavier Quantin
- Département d'Oncologie Médicale, Institut du Cancer de Montpellier (ICM), Montpellier, France
| | - Jean-Louis Pujol
- Département d'Oncologie Thoracique, CHU Montpellier, Univ. Montpellier, Montpellier, France
| | - Benoit Roch
- Département d'Oncologie Thoracique, CHU Montpellier, Univ. Montpellier, Montpellier, France
| | - Abdelali Bouidioua
- Département de Pathologie et Oncobiologie, Laboratoire de Biologie des Tumeurs Solides, CHU Montpellier, Univ. Montpellier, Montpellier, France
| | - Sylvain Godreuil
- Laboratoire de Bactériologie, CHU Montpellier, Univ. Montpellier, Montpellier, France.,UMR MIVEGEC IRD-CNRS-Université de Montpellier, IRD, Montpellier, France
| | - Etienne Coyaud
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Pierre Brousset
- Laboratoire de Pathologie Moléculaire, Institut Universitaire du Cancer Toulouse Oncopôle, CHU de Toulouse, Toulouse, France.,Laboratoire d'excellence Labex TOUCAN, Toulouse, France
| | - Jérôme Solassol
- Département de Pathologie et Oncobiologie, Laboratoire de Biologie des Tumeurs Solides, CHU Montpellier, Univ. Montpellier, Montpellier, France. .,IRCM, INSERM, Univ. Montpellier, ICM, Montpellier, France
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Yamashige R, Kimoto M, Okumura R, Hirao I. Visual Detection of Amplified DNA by Polymerase Chain Reaction Using a Genetic Alphabet Expansion System. J Am Chem Soc 2018; 140:14038-14041. [PMID: 30336010 DOI: 10.1021/jacs.8b08121] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Visual DNA amplification using a simple polymerase chain reaction (PCR) device is useful for field tests to detect target DNA and RNA. We hereby describe a detection system involving PCR amplification visualized with the naked eye, by genetic alphabet expansion. The system employs fluorescence resonance energy transfer (FRET) between unnatural base combinations: self-quenched dinucleotides of 2-amino-6-(2-thienyl)purine (s) as a donor and Cy3-conjugated 2-nitro-4-propynylpyrrole (Cy3-hx-Px) as an acceptor. During PCR, the triphosphate substrate of Cy3-hx-Px (Cy3-hx-dPxTP) is incorporated into DNA opposite its pairing partner, 7-(2-thienyl)-imidazo[4,5- b]pyridine (Ds), in the primer, which also contains the dinucleotides of s. Thus, the amplified DNA can be visualized by the Cy3 fluorescence resulting from the FRET between the s-dinucleotides and the incorporated Cy3-hx-Px upon 365 nm irradiation. Using this system, we demonstrated the visual single nucleotide polymorphism detection of a series of quinolone-resistant bacteria genes.
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Affiliation(s)
- Rie Yamashige
- RIKEN Center for Life Science Technologies , 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama , Kanagawa 230-0045 , Japan
| | - Michiko Kimoto
- RIKEN Center for Life Science Technologies , 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama , Kanagawa 230-0045 , Japan.,Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, #07-01 , Singapore 138669 , Singapore
| | - Ryo Okumura
- Rare Disease Laboratories, Group I, R&D Division , Daiichi Sankyo Co. Ltd. , 1-2-58 Hiromachi , Shinagawa-ku , Tokyo 140-8710 Japan
| | - Ichiro Hirao
- RIKEN Center for Life Science Technologies , 1-7-22 Suehiro-cho , Tsurumi-ku, Yokohama , Kanagawa 230-0045 , Japan.,Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos, #07-01 , Singapore 138669 , Singapore
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