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Alen BO, Estévez-Pérez LS, Hermida-Romero MT, Reguera-Arias A, García-Campelo R, de la Torre-Bravos M, Concha Á. Molecular Targets in Lung Cancer: Study of the Evolution of Biomarkers Associated with Treatment with Tyrosine Kinase Inhibitors—Has NF1 Tumor Suppressor a Key Role in Acquired Resistance? Cancers (Basel) 2022; 14:cancers14143323. [PMID: 35884384 PMCID: PMC9313361 DOI: 10.3390/cancers14143323] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 05/25/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary Resistance to tyrosine kinase inhibitors in patients with EGFR-mutated non-small cell lung cancer is crucial in the development of the disease. Detecting the mechanisms of this resistance is fundamental in lung cancer research, so we evaluated the presence of EGFR mutations in circulating free DNA in plasma of patients with NSCLC under oncological treatment. We studied the role of EGFR and other driver mutations in their involvement in acquired resistance to treatment with EGFR-TKIs and we analyzed the role of liquid biopsy as a non-invasive diagnostic method. Our results showed that liquid biopsy is a very useful tool monitoring the evolution of the disease and the resistance to TKIs. The detection of other concomitant mutations in driver genes is also key in this regard, so we found that alterations in the NFI tumor suppressor gene could be playing a role in disease progression and resistance to targeted therapies. Abstract The application to clinical practice of liquid biopsy in patients with lung cancer has led to an advance in the diagnosis and monitoring of the disease. Detection of alterations in EGFR genes related to TKI treatment in EGFR-mutated non-small cell lung cancer patients is a routine method in pathology laboratories. The primary objective of this work was to analyze the presence of EGFR mutations in cfDNA of 86 patients with lung cancer undergoing oncological treatment related to response to treatment with TKIs. Secondarily, we evaluated the dynamics of EGFR mutations, the presence of the T790M alteration and its relationship with drug resistance and analyzed by NGS molecular alterations in cfDNA of patients with discordant progression. Our results demonstrate that understanding the mutational status of patients treated with TKIs over time is essential to monitor disease progression. In this context, liquid biopsy is a fundamental key. In addition, it is not only necessary to detect EGFR mutations, but also other concomitant mutations that would be influencing the development of the disease. In this sense, we have discovered that mutations in the NF1 tumor suppressor gene could be exerting an as yet unknown function in lung cancer.
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Affiliation(s)
- Begoña O. Alen
- Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain; (M.T.H.-R.); (A.R.-A.); (Á.C.)
- Molecular Biology Area, Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain
- Correspondence: (B.O.A.); (L.S.E.-P.); Tel.: +34-981-178-000 (B.O.A.); +34-981-178-000 (L.S.E.-P.)
| | - Lara S. Estévez-Pérez
- Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain; (M.T.H.-R.); (A.R.-A.); (Á.C.)
- Molecular Biology Area, Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain
- Correspondence: (B.O.A.); (L.S.E.-P.); Tel.: +34-981-178-000 (B.O.A.); +34-981-178-000 (L.S.E.-P.)
| | - María Teresa Hermida-Romero
- Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain; (M.T.H.-R.); (A.R.-A.); (Á.C.)
| | - Ana Reguera-Arias
- Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain; (M.T.H.-R.); (A.R.-A.); (Á.C.)
| | | | | | - Ángel Concha
- Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain; (M.T.H.-R.); (A.R.-A.); (Á.C.)
- Molecular Biology Area, Department of Anatomical Pathology, University Hospital Complex A Coruña, 15006 A Coruña, Spain
- Biobank of A Coruña, Instituto de Investigación Biomédica A Coruña (INIBIC), 15006 A Coruña, Spain
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Li H, Zhao S, Chen X, Feng G, Chen Z, Fan S. MiR-145 modulates the radiosensitivity of non-small cell lung cancer cells by suppression of TMOD3. Carcinogenesis 2021; 43:288-296. [PMID: 34888652 DOI: 10.1093/carcin/bgab121] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/29/2021] [Accepted: 12/07/2021] [Indexed: 12/18/2022] Open
Abstract
Radioresistance is a major problem encountered in the treatment of non-small cell lung cancer (NSCLC). Aberrant microRNA (miRNA) expression contributes to multiple cancer‑associated signaling pathways, and profoundly influences effects of radiotherapy (RT) in cancers. MicroRNA-145-5p (miR-145) is recognized as a tumor suppresser in NSCLC. However, the roles of miR-145 during radiotherapy of NSCLC are largely unknown. The present study aimed to investigate the function and underlying mechanism of miR-145 in modulation of radiosensitivity in NSCLC. We generated radioresistant H460 and A549 subclones, named H460R and A549R, respectively, and found that irradiation (IR) could suppress the expression levels of miR-145 in radioresistant NSCLC cells. Furthermore, overexpression of miR-145 could sensitize radioresistant NSCLC cells to IR, while knockdown of miR-145 in NSCLC cells acted the converse manner. Mechanically, miR-145 was able to directly target 3'UTR of tropomodulin 3 (TMOD3) mRNA and decrease the expression of TMOD3 at the levels of mRNA and protein. Additionally, we confirmed that miR-145 could enhance the radiosensitivity of radioresistant NSCLC cells by targeting TMOD3 in vitro and in vivo, and could be used as a target in clinical treatment of NSCLC. Collectively, restoration of miR-145 expression increases the radiosensitivity of radioresistant NSCLC cells by suppression of TMOD3, and miR-145 can act as a new radiosensitizer for NSCLC therapy.
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Affiliation(s)
- Hang Li
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, P.R. China
| | - Shuya Zhao
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, P.R. China
| | - Xin Chen
- Department of Oncology, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
| | - Guoxing Feng
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, P.R. China
| | - Zhiyuan Chen
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, P.R. China
| | - Saijun Fan
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, P.R. China
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