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Tsai TY, Chen CY, Shiao LR, Ou TT, Wu CH, Leung YM, Chow LWC. Afatinib triggers a Ni 2+ -resistant Ca 2+ influx pathway in A549 non-small cell lung cancer cells. Fundam Clin Pharmacol 2023; 37:253-262. [PMID: 36191338 DOI: 10.1111/fcp.12835] [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: 06/14/2022] [Revised: 09/09/2022] [Accepted: 10/02/2022] [Indexed: 03/04/2023]
Abstract
Afatinib is used to treat non-small cell lung cancer cells (NSCLC), and its mechanism involves irreversible inhibition of epidermal growth factor receptor (EGFR) tyrosine kinase. In this study, we examined if afatinib had cytotoxic action against NSCLC other than inhibition of tyrosine kinase. Afatinib (1-30 μM) caused apoptotic death in A549 NSCLC in a concentration-dependent manner. Afatinib triggered Ca2+ influx without causing Ca2+ release, and the Ca2+ influx was unaffected by sodium orthovanadate (SOV, an inhibitor of tyrosine phosphatase), suggesting that afatinib-triggered Ca2+ response was unrelated to its inhibition of tyrosine kinase. Addition of afatinib also promoted Mn2+ influx. Ca2+ influx triggered by afatinib was resistant to SKF96365 and ruthenium red (two general blockers of TRP channels) and, unexpectedly, Ni2+ (a non-specific Ca2+ channel blocker). Afatinib caused an increase in mitochondrial Ca2+ level, an initial mitochondrial hyperpolarization (4 h) and followed by mitochondrial potential collapse (24-48 h). Afatinib-induced cell death was slightly but significantly alleviated in low extracellular Ca2+ condition or under pharmacological block of mitochondrial permeability transition pore (MPTP) opening by cyclosporin A. Therefore, in addition to tyrosine kinase inhibition as a major anti-cancer mechanism of afatinib, stimulation of an atypical Ca2+ influx pathway, mitochondrial Ca2+ overload, and potential collapse in part contribute to afatinib-induced cell death.
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Affiliation(s)
- Tien-Yao Tsai
- Cardiovascular Division, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Cing-Yu Chen
- Department of Physiology, China Medical University, Taichung, Taiwan
| | - Lian-Ru Shiao
- Department of Physiology, China Medical University, Taichung, Taiwan
| | - Ting-Tsz Ou
- Department of Medicinal Botanicals and Healthcare, Dayeh University, Changhua, Taiwan
| | - Cheng-Hsun Wu
- Department of Anatomy, China Medical University, Taichung, Taiwan
| | - Yuk-Man Leung
- Department of Physiology, China Medical University, Taichung, Taiwan
| | - Louis W C Chow
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Taipa, Macau.,UNIMED Medical Institute, Hong Kong.,Organisation for Oncology and Translational Research, Hong Kong
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2
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Wei X, Song M, Huang C, Yu Q, Jiang G, Jin G, Jia X, Shi Z. Effectiveness, safety and pharmacokinetics of Polo-like kinase 1 inhibitors in tumor therapy: A systematic review and meta-analysis. Front Oncol 2023; 13:1062885. [PMID: 36845678 PMCID: PMC9947705 DOI: 10.3389/fonc.2023.1062885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/24/2023] [Indexed: 02/11/2023] Open
Abstract
Objective To provide a systematic review of existing meta-analysis on the efficacy, safety and pharmacokinetics of the novel Polo-like kinase-1 (Plk1) inhibitors in various tumor treatments, and assess the methodological quality and the strength of evidence of the included meta-analysis. Methods The Medline, PubMed, Embase, etc. were searched and updated on 30 June 2022. 22 eligible clinical trials involving a total of 1256 patients were included for analyses. Randomised controlled trials (RCTs) compared the efficacy or safety, or both of any Plk1 inhibitors with placebo (active or inert) in participants. To be included, studies had to be RCTs, quasi-RCTs, and nonrandomized comparative studies. Results A meta-analysis of two trials reported progression-free survival (PFS) of the overall population (effect size (ES), 1.01; 95% confidence intervals (CIs), 0.73-1.30, I2 =0.0%, P<0.001) and overall survival (OS) of the overall population (ES, 0.91; 95% CIs, 0.31-1.50, I2 =77.6%, P=0.003). 18 adverse events (AEs) reflected that the possibility of occurrence of AEs in the Plk1 inhibitors group was 1.28 times higher than in the control group (odds ratios (ORs), 1.28; 95% CIs,1.02-1.61). The results of meta-analysis showed that the incidence of AEs in the nervous system was the highest (ES, 0.202; 95% CIs, 0.161-0.244), followed by blood system (ES, 0.190; 95% CIs, 0.178-0.201) and digestive system (ES, 0.181; 95% CIs, 0.150-0.213). Rigosertib (ON 01910.Na) was associated with a decreased risk of AEs in digestive system (ES, 0.103; 95% CIs, 0.059-0.147), but BI 2536 and Volasertib (BI 6727) increased risk of AEs in blood system (ES, 0.399; 95% CIs, 0.294-0.504). Five eligible studies reported the pharmacokinetic parameters of the low dosage (100 mg) cohort and the high dosage (200 mg) cohort, and there was no statistical difference in the total plasma clearance, terminal half-life and apparent volume of distribution at steady state. Conclusions Plk1 inhibitors work better in improving OS and they are well tolerated, effective and safe in reducing the severity of illness while improving the quality of life, especially in patients with non-specific tumors, respiratory system tumors, musculoskeletal system tumors, and urinary system tumors. However, they fail to prolong the PFS. From the vertical whole level analysis, compared to other systems in the body, Plk1 inhibitors should be avoided as far as possible for the treatment of tumors related to the blood circulatory system, digestive system and nervous system, which were attributed to the intervention of Plk1 inhibitors associated with an increased risk of AEs in these systems. The toxicity caused by immunotherapy should be carefully considered. Conversely, a horizontal comparison of three different types of Plk1 inhibitors suggested that Rigosertib (ON 01910.Na) might be relatively suitable for the treatment of tumors associated with the digestive system, while Volasertib (BI 6727) might be even less suitable for the treatment of tumors associated with the blood circulation system. Additionally, in the dose selection of Plk1 inhibitors, the low dose of 100 mg should be preferred, and meanwhile, it can also ensure the pharmacokinetic efficacy that is indistinguishable from the high dose of 200 mg. Systematic review registration https://www.crd.york.ac.uk/prospero/, identifier CRD42022343507.
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Affiliation(s)
- Xiao Wei
- School of Preclinical Medicine, Chengdu University, Chengdu, China
| | - Mingzhu Song
- School of Preclinical Medicine, Chengdu University, Chengdu, China,*Correspondence: Mingzhu Song, ; Xibiao Jia, ; Zheng Shi,
| | - Chan Huang
- School of Preclinical Medicine, Chengdu University, Chengdu, China
| | - Qiao Yu
- School of Preclinical Medicine, Chengdu University, Chengdu, China
| | - Guirong Jiang
- School of Preclinical Medicine, Chengdu University, Chengdu, China
| | - Guanghao Jin
- School of Preclinical Medicine, Chengdu University, Chengdu, China
| | - Xibiao Jia
- Key Laboratory of Ministry of Education of Birth Defects and Related Maternal and Child Diseases, West China Second Hospital, Sichuan University, Chengdu, China,*Correspondence: Mingzhu Song, ; Xibiao Jia, ; Zheng Shi,
| | - Zheng Shi
- Clinical Genetics Laboratory, Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu University, Chengdu, China,*Correspondence: Mingzhu Song, ; Xibiao Jia, ; Zheng Shi,
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3
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Gurbi B, Brauswetter D, Pénzes K, Varga A, Krenács T, Dános K, Birtalan E, Tamás L, Csala M. MEK Is a Potential Indirect Target in Subtypes of Head and Neck Cancers. Int J Mol Sci 2023; 24:ijms24032782. [PMID: 36769112 PMCID: PMC9917750 DOI: 10.3390/ijms24032782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
The poor prognosis of head-and-neck squamous cell carcinoma (HNSCC) is partly due to the lack of reliable prognostic and predictive markers. The Ras/Raf/MEK/ERK signaling pathway is often activated by overexpressed epidermal growth factor receptor (EGFR) and stimulates the progression of HNSCCs. Our research was performed on three human papillomavirus (HPV)-negative HNSCC-cell lines: Detroit 562, FaDu and SCC25. Changes in cell viability upon EGFR and/or MEK inhibitors were measured by the MTT method. The protein-expression and phosphorylation profiles of the EGFR-initiated signaling pathways were assessed using Western-blot analysis. The EGFR expression and pY1068-EGFR levels were also studied in the patient-derived HNSCC samples. We found significant differences between the sensitivity of the tumor-cell lines used. The SCC25 line was found to be the most sensitive to the MEK inhibitors, possibly due to the lack of feedback Akt activation through EGFR. By contrast, this feedback activation had an important role in the FaDu cells. The observed insensitivity of the Detroit 562 cells to the MEK inhibitors might have been caused by their PIK3CA mutation. Among HNSCC cell lines, EGFR-initiated signaling pathways are particularly versatile. An ERK/EGFR feedback loop can lead to Akt-pathway activation upon MEK inhibition, and it is related not only to increased amounts of EGFR but also to the elevation of pY1068-EGFR levels. The presence of this mechanism may justify the combined application of EGFR and MEK inhibitors.
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Affiliation(s)
- Bianka Gurbi
- Department of Molecular Biology, Semmelweis University, H-1094 Budapest, Hungary
- MTA-SE Pathobiochemistry Research Group, Semmelweis University, H-1094 Budapest, Hungary
| | - Diána Brauswetter
- MTA-SE Pathobiochemistry Research Group, Semmelweis University, H-1094 Budapest, Hungary
- Correspondence: (D.B.); (M.C.)
| | - Kinga Pénzes
- MTA-SE Pathobiochemistry Research Group, Semmelweis University, H-1094 Budapest, Hungary
| | - Attila Varga
- Department of Molecular Biology, Semmelweis University, H-1094 Budapest, Hungary
- MTA-SE Pathobiochemistry Research Group, Semmelweis University, H-1094 Budapest, Hungary
| | - Tibor Krenács
- Department of Pathology and Experimental Cancer Research, Semmelweis University, H-1085 Budapest, Hungary
| | - Kornél Dános
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Semmelweis University, H-1083 Budapest, Hungary
| | - Ede Birtalan
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Semmelweis University, H-1083 Budapest, Hungary
| | - László Tamás
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Semmelweis University, H-1083 Budapest, Hungary
- Department of Voice, Speech and Swallowing Therapy, Faculty of Health Sciences, Semmelweis University, H-1088 Budapest, Hungary
| | - Miklós Csala
- Department of Molecular Biology, Semmelweis University, H-1094 Budapest, Hungary
- MTA-SE Pathobiochemistry Research Group, Semmelweis University, H-1094 Budapest, Hungary
- Correspondence: (D.B.); (M.C.)
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Bei R, Benvenuto M, Focaccetti C, Fazi S, Moretti M, Nardozi D, Angiolini V, Ciuffa S, Cifaldi L, Carrano R, Palumbo C, Miele MT, Bei R, Barillari G, Manzari V, De Smaele E, Modesti A, Masuelli L. Combined treatment with inhibitors of ErbB Receptors and Hh signaling pathways is more effective than single treatment in reducing the growth of malignant mesothelioma both in vitro and in vivo. Lab Invest 2022; 20:286. [PMID: 35752861 PMCID: PMC9233819 DOI: 10.1186/s12967-022-03490-9] [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: 05/13/2022] [Accepted: 06/16/2022] [Indexed: 11/11/2022]
Abstract
Malignant mesothelioma (MM) is a rare orphan aggressive neoplasia with low survival rates. Among the other signaling pathways, ErbB receptors and Hh signaling are deregulated in MM. Thus, molecules involved in these signaling pathways could be used for targeted therapy approaches. The aim of this study was to evaluate the effects of inhibitors of Hh- (GANT-61) and ErbB receptors (Afatinib)-mediated signaling pathways, when used alone or in combination, on growth, cell cycle, cell death and autophagy, modulation of molecules involved in transduction pathways, in three human MM cell lines of different histotypes. The efficacy of the combined treatment was also evaluated in a murine epithelioid MM cell line both in vitro and in vivo. This study demonstrated that combined treatment with two inhibitors counteracting the activation of two different signaling pathways involved in neoplastic transformation and progression, such as those activated by ErbB and Hh signaling, is more effective than the single treatments in reducing MM growth in vitro and in vivo. This study may have clinical implications for the development of targeted therapy approaches for MM.
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Affiliation(s)
- Roberto Bei
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy.
| | - Monica Benvenuto
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy.,Saint Camillus International University of Health and Medical Sciences, via di Sant'Alessandro 8, 00131, Rome, Italy
| | - Chiara Focaccetti
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Sara Fazi
- Department of Experimental Medicine, University of Rome "Sapienza", viale Regina Elena 324, 00161, Rome, Italy
| | - Marta Moretti
- Department of Experimental Medicine, University of Rome "Sapienza", viale Regina Elena 324, 00161, Rome, Italy
| | - Daniela Nardozi
- Department of Experimental Medicine, University of Rome "Sapienza", viale Regina Elena 324, 00161, Rome, Italy
| | - Valentina Angiolini
- Department of Experimental Medicine, University of Rome "Sapienza", viale Regina Elena 324, 00161, Rome, Italy
| | - Sara Ciuffa
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Loredana Cifaldi
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy.,Academic Department of Pediatrics (DPUO), Ospedale Pediatrico Bambino Gesù, IRCCS, 00165, Rome, Italy
| | - Raffaele Carrano
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Camilla Palumbo
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Martino Tony Miele
- Department of Experimental Medicine, University of Rome "Tor Vergata", Via Montpellier 1, 00133, Rome, Italy
| | - Riccardo Bei
- Medical School, University of Rome "Tor Vergata", 00133, Rome, Italy
| | - Giovanni Barillari
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Vittorio Manzari
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Enrico De Smaele
- Department of Experimental Medicine, University of Rome "Sapienza", viale Regina Elena 324, 00161, Rome, Italy
| | - Andrea Modesti
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", via Montpellier 1, 00133, Rome, Italy
| | - Laura Masuelli
- Department of Experimental Medicine, University of Rome "Sapienza", viale Regina Elena 324, 00161, Rome, Italy
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5
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Huang W, Hao Z, Mao F, Guo D. Small Molecule Inhibitors in Adult High-Grade Glioma: From the Past to the Future. Front Oncol 2022; 12:911876. [PMID: 35785151 PMCID: PMC9247310 DOI: 10.3389/fonc.2022.911876] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 05/13/2022] [Indexed: 12/12/2022] Open
Abstract
Glioblastoma is the most common primary malignant tumor in the brain and has a dismal prognosis despite patients accepting standard therapies. Alternation of genes and deregulation of proteins, such as receptor tyrosine kinase, PI3K/Akt, PKC, Ras/Raf/MEK, histone deacetylases, poly (ADP-ribose) polymerase (PARP), CDK4/6, branched-chain amino acid transaminase 1 (BCAT1), and Isocitrate dehydrogenase (IDH), play pivotal roles in the pathogenesis and progression of glioma. Simultaneously, the abnormalities change the cellular biological behavior and microenvironment of tumor cells. The differences between tumor cells and normal tissue become the vulnerability of tumor, which can be taken advantage of using targeted therapies. Small molecule inhibitors, as an important part of modern treatment for cancers, have shown significant efficacy in hematologic cancers and some solid tumors. To date, in glioblastoma, there have been more than 200 clinical trials completed or ongoing in which trial designers used small molecules as monotherapy or combination regimens to correct the abnormalities. In this review, we summarize the dysfunctional molecular mechanisms and highlight the outcomes of relevant clinical trials associated with small-molecule targeted therapies. Based on the outcomes, the main findings were that small-molecule inhibitors did not bring more benefit to newly diagnosed glioblastoma, but the clinical studies involving progressive glioblastoma usually claimed “noninferiority” compared with historical results. However, as to the clinical inferiority trial, similar dosing regimens should be avoided in future clinical trials.
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Affiliation(s)
- Wenda Huang
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhaonian Hao
- Department of Neurosurgery, Beijing TianTan Hospital, Capital Medical University, Beijing, China
| | - Feng Mao
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Dongsheng Guo, ; Feng Mao,
| | - Dongsheng Guo
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Dongsheng Guo, ; Feng Mao,
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6
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Maarof NNN, Abdulmalek E, Fakurazi S, Rahman MBA. Biodegradable Carbonate Apatite Nanoparticle as a Delivery System to Promote Afatinib Delivery for Non-Small Cell Lung Cancer Treatment. Pharmaceutics 2022; 14:pharmaceutics14061230. [PMID: 35745802 PMCID: PMC9228174 DOI: 10.3390/pharmaceutics14061230] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 12/04/2022] Open
Abstract
Nanomedicine-based drug-delivery systems have significant interest in cancer treatment, such as improving the stabilities and biocompatibilities, precise targeting, and reducing toxicities for non-cancerous cells. Herein, this study presents the synthesis and characterisation of carbonate apatite nanoparticles (nCA) and encapsulated afatinib (AFA) as promising drug delivery candidates for lung cancer treatment. nCA/AFA was synthesised and physicochemically characterised, then the encapsulation capacity, drug loading, and cumulative drug release profile were evaluated. Powder X-ray diffraction (PXRD) confirmed that the synthesised nCA is apatite. Fourier-transform infrared spectroscopy (FTIR) results confirmed the drug loading into the nanoparticles. High-resolution transmission electron microscopy (HR-TEM) determined the morphology of nCA and nCA/AFA and the diameters of 47.36 ± 3.16 and 42.97 ± 2.78 nm, respectively, without an unaltered nCA phase. Encapsulation efficiency (%) and drug loading (%) were 55.08% ± 1.68% and 8.19% ± 0.52%. Brunauer–Emmett–Teller (BET) and dynamic light-scattering (DLS) results revealed that the synthesised nCA is mesoporous, with a surface area of 55.53 m2/g, and is negatively charged. Atomic force microscopy (AFM) showed increasing roughness of nCA/AFA compared to nCA. The drug release from the nano-formulation nCA/AFA demonstrated slow and sustained release compared to the pure drug. Accordingly, nCA/AFA represents a promising drug delivery system for NSCLC treatment.
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Affiliation(s)
- Nian N. N. Maarof
- Integrated Chemical BioPhysics Research, Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.N.N.M.); (E.A.)
- Department of Chemistry, College of Education, University of Sulaimani, Sulaimani 46001, Iraq
| | - Emilia Abdulmalek
- Integrated Chemical BioPhysics Research, Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.N.N.M.); (E.A.)
| | - Sharida Fakurazi
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia UPM, Serdang 43400, Selangor, Malaysia;
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia UPM, Serdang 43400, Selangor, Malaysia
| | - Mohd Basyaruddin Abdul Rahman
- Integrated Chemical BioPhysics Research, Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (N.N.N.M.); (E.A.)
- UPM-MAKNA Cancer Laboratory, Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Correspondence: ; Tel.: +60-397-696-601
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7
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Satgunaseelan L, Porazinski S, Strbenac D, Istadi A, Willet C, Chew T, Sadsad R, Palme CE, Lee JH, Boyer M, Yang JYH, Clark JR, Pajic M, Gupta R. Oral Squamous Cell Carcinoma in Young Patients Show Higher Rates of EGFR Amplification: Implications for Novel Personalized Therapy. Front Oncol 2021; 11:750852. [PMID: 34912708 PMCID: PMC8666981 DOI: 10.3389/fonc.2021.750852] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/26/2021] [Indexed: 12/16/2022] Open
Abstract
There is an increasing worldwide incidence of patients under 50 years of age presenting with oral squamous cell carcinoma (OSCC). The molecular mechanisms driving disease in this emerging cohort remain unclear, limiting impactful treatment options for these patients. To identify common clinically actionable targets in this cohort, we used whole genome and transcriptomic sequencing of OSCC patient samples from 26 individuals under 50 years of age. These molecular profiles were compared with those of OSCC patients over 50 years of age (n=11) available from TCGA. We show for the first time that a molecular signature comprising of EGFR amplification and increased EGFR RNA abundance is specific to the young subset of OSCC patients. Furthermore, through functional assays using patient tumor-derived cell lines, we reveal that this EGFR amplification results in increased activity of the EGFR pathway. Using a panel of clinically relevant EGFR inhibitors we determine that an EGFR-amplified patient-derived cell line is responsive to EGFR inhibition, suggesting EGFR amplification represents a valid therapeutic target in this subset of OSCC patients. In particular, we demonstrate sensitivity to the second-generation EGFR tyrosine kinase inhibitor afatinib, which offers a new and promising therapeutic avenue versus current EGFR-targeting approaches. We propose that testing for EGFR amplification could easily be integrated into current diagnostic workflows and such measures could lead to more personalized treatment approaches and improved outcomes for this younger cohort of OSCC patients.
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Affiliation(s)
- Laveniya Satgunaseelan
- Department of Tissue Pathology and Diagnostic Oncology, NSW Health Pathology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Sydney Medical School, Faculty of Medicine and Health Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Sean Porazinski
- Cancer Theme, The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, NSW, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Dario Strbenac
- School of Mathematics and Statistics, The University of Sydney, Sydney, NSW, Australia
| | - Aji Istadi
- Cancer Theme, The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Cali Willet
- The Sydney Informatics Hub, Core Research Facilities, The University of Sydney, Sydney, NSW, Australia
| | - Tracy Chew
- The Sydney Informatics Hub, Core Research Facilities, The University of Sydney, Sydney, NSW, Australia
| | - Rosemarie Sadsad
- The Sydney Informatics Hub, Core Research Facilities, The University of Sydney, Sydney, NSW, Australia
| | - Carsten E Palme
- Sydney Head and Neck Cancer Institute, Department of Head and Neck Surgery, Chris O'Brien Lifehouse, Sydney, NSW, Australia
| | - Jenny H Lee
- Department of Medical Oncology, Chris O'Brien Lifehouse, Sydney, NSW, Australia
| | - Michael Boyer
- Sydney Medical School, Faculty of Medicine and Health Sciences, The University of Sydney, Sydney, NSW, Australia.,Department of Medical Oncology, Chris O'Brien Lifehouse, Sydney, NSW, Australia
| | - Jean Y H Yang
- School of Mathematics and Statistics, The University of Sydney, Sydney, NSW, Australia.,Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
| | - Jonathan R Clark
- Sydney Medical School, Faculty of Medicine and Health Sciences, The University of Sydney, Sydney, NSW, Australia.,Sydney Head and Neck Cancer Institute, Department of Head and Neck Surgery, Chris O'Brien Lifehouse, Sydney, NSW, Australia.,Royal Prince Alfred Institute of Academic Surgery, Sydney Local Health District, Sydney, NSW, Australia
| | - Marina Pajic
- Cancer Theme, The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, NSW, Australia.,St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Ruta Gupta
- Department of Tissue Pathology and Diagnostic Oncology, NSW Health Pathology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.,Sydney Medical School, Faculty of Medicine and Health Sciences, The University of Sydney, Sydney, NSW, Australia.,Sydney Head and Neck Cancer Institute, Department of Head and Neck Surgery, Chris O'Brien Lifehouse, Sydney, NSW, Australia
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