1
|
ErbB3-Targeting Oncolytic Adenovirus Causes Potent Tumor Suppression by Induction of Apoptosis in Cancer Cells. Int J Mol Sci 2022; 23:ijms23137127. [PMID: 35806132 PMCID: PMC9266575 DOI: 10.3390/ijms23137127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/23/2022] [Accepted: 06/23/2022] [Indexed: 12/10/2022] Open
Abstract
Cancer is a multifactorial and deadly disease. Despite major advancements in cancer therapy in the last two decades, cancer incidence is on the rise and disease prognosis still remains poor. Furthermore, molecular mechanisms of cancer invasiveness, metastasis, and drug resistance remain largely elusive. Targeted cancer therapy involving the silencing of specific cancer-enriched proteins by small interfering RNA (siRNA) offers a powerful tool. However, its application in clinic is limited by the short half-life of siRNA and warrants the development of efficient and stable siRNA delivery systems. Oncolytic adenovirus-mediated therapy offers an attractive alternative to the chemical drugs that often suffer from innate and acquired drug resistance. In continuation to our reports on the development of oncolytic adenovirus-mediated delivery of shRNA, we report here the replication-incompetent (dAd/shErbB3) and replication-competent (oAd/shErbB3) oncolytic adenovirus systems that caused efficient and persistent targeting of ErbB3. We demonstrate that the E1A coded by oAd/shErbB, in contrast to dAd/shErbB, caused downregulation of ErbB2 and ErbB3, yielding stronger downregulation of the ErbB3-oncogenic signaling axis in in vitro models of lung and breast cancer. These results were validated by in vivo antitumor efficacy of dAd/shErbB3 and oAd/shErbB3.
Collapse
|
2
|
Hua Y, Li W, Jin N, Cai D, Sun J, Sun C, Yang F, Wu X, Huang X, Wang B, Yin Y. Treatment with pyrotinib-based therapy in lapatinib-resistant HER2-positive metastatic breast cancer: a multicenter real-world study. Ther Adv Med Oncol 2022; 14:17588359221085232. [PMID: 35356262 PMCID: PMC8958671 DOI: 10.1177/17588359221085232] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 02/15/2022] [Indexed: 11/25/2022] Open
Abstract
Background: Tyrosine kinase inhibitors (TKIs) are effective for treating human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer. However, therapies subsequent to TKI progression remain controversial, and effective treatments for TKI resistance are urgently needed. We evaluate the practice of exchange of TKIs, which involves treatment with a different TKI following prior TKI failure. Specifically, this study investigated the efficacy of pyrotinib-based therapy in lapatinib-resistant HER2-positive metastatic breast cancer (NCT04899128). Methods: This real-world study included 76 patients diagnosed with HER2-positive metastatic breast cancer who received pyrotinib-based therapy after lapatinib progression at four Chinese institutions between August 2018 and March 2020. Progression-free survival (PFS), overall survival (OS), objective response rate (ORR), clinical benefit rate (CBR), and toxicity profiles were reported. Results: All patients received pyrotinib-based therapy in two or later line therapy. The median PFS was 8.0 months (95% CI 5.1–10.9). OS has not reached. The ORR and CBR were 17.1% and 60.5%, respectively. The median PFS was 7.1 months (95% CI 5.633–8.567) and intracranial ORR was 42.9% in patients who had brain metastasis (n = 14). Patients who benefited from lapatinib ⩾ 6.0 months prior exhibited a longer PFS (10.6 versus 6.0 months, p = 0.034, stratified hazard ratio (HR) 0.534, 95% CI 0.293–0.975). The most common adverse effects were diarrhea (n = 34, 44.7%) and hand-foot syndrome (n = 10, 13.2%). Conclusion: Pyrotinib-based therapy has the potential to improve survival in patients with lapatinib-resistant HER2-positive metastatic breast cancer, including those with brain metastases. Pyrotinib could provide a clinically significant increase in PFS for patients who benefited from prior lapatinib.
Collapse
Affiliation(s)
- Yijia Hua
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- The First Clinical College of Nanjing Medical University, Nanjing, China
| | - Wei Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Nan Jin
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- The First Clinical College of Nanjing Medical University, Nanjing, China
| | - Dongyan Cai
- Department of Medical Oncology, The Affiliated Hospital of Jiangnan University Wuxi, China
| | - Jie Sun
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Chunxiao Sun
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Fan Yang
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xinyu Wu
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- The First Clinical College of Nanjing Medical University, Nanjing, China
| | - Xiang Huang
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Biyun Wang
- Department of Breast Cancer and Urological Medical Oncology, Fudan University Shanghai Cancer Center
- Department of Oncology, Shanghai Medical College, Fudan University, No.270, Dong’an Road, Xuhui District, Shanghai 200032, China
| | - Yongmei Yin
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing 210029, China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Nanjing Medical University, Nanjing, China
| |
Collapse
|
3
|
Dong H, Du L, Cai S, Lin W, Chen C, Still M, Yao Z, Coppes RP, Pan Y, Zhang D, Gao S, Zhang H. Tyrosine Phosphatase PTPRO Deficiency in ERBB2-Positive Breast Cancer Contributes to Poor Prognosis and Lapatinib Resistance. Front Pharmacol 2022; 13:838171. [PMID: 35431974 PMCID: PMC9010868 DOI: 10.3389/fphar.2022.838171] [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: 12/17/2021] [Accepted: 03/07/2022] [Indexed: 02/05/2023] Open
Abstract
Despite the initial benefit from treating ERBB2-positive breast cancer with tyrosine kinase inhibitor lapatinib, resistance develops inevitably. Since the expression of protein tyrosine phosphatase receptor-type O (PTPRO), a member of the R3 subfamily of receptor protein tyrosine phosphatases (PTPs), is inversely correlated with the aggressiveness of multiple malignancies, we decided to explore the correlation between PTPRO and lapatinib resistance in ERBB2-positive breast cancer. Results of immunohistochemical (IHC) staining and the correlation analysis between the expression levels of PTPRO and the clinicopathological parameters indicate that PTPRO is downregulated in cancer tissues as compared with normal tissues and negatively associated with differentiation, tumor size, tumor depth, as well as the expression of ERBB2 and Ki67. Results from Kaplan-Meier analyses indicate that lower expression of PTPRO is correlated with shorter relapse-free survival for patients with ERBB2-positive breast cancer, and multivariable Cox regression analysis found that PTPRO can potentially serve as an independent prognostic indicator for ERBB2-positive breast cancer. Results from both human breast cancer cells with PTPRO knockdown or overexpression and mouse embryonic fibroblasts (MEFs) which derived from Ptpro +/+ and Ptpro -/- mice with then stably transfected plasmid FUGW-Erbb2 consistently demonstrated the essentiality of PTPRO in the lapatinib-mediated anticancer process. Our findings suggest that PTPRO is not only able to serve as an independent prognostic indicator, but upregulating PTPRO can also reverse the lapatinib resistance of ERBB2-positive breast cancer.
Collapse
Affiliation(s)
- Hongmei Dong
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Department of General Surgery, The First Affiliated Hospital of Jinan University, Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, China
| | - Liang Du
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Department of General Surgery, The First Affiliated Hospital of Jinan University, Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, China
- Departments of Biomedical Sciences of Cells and Systems, Section Molecular Cell Biology and Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- Graduate School, Shantou University Medical College, Shantou, China
| | - Songwang Cai
- Department of Thoracic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Wan Lin
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - Chaoying Chen
- Graduate School, Shantou University Medical College, Shantou, China
- Department of Clinical Laboratory, The First Affiliated Hospital of Hunan Traditional Chinese Medical College (Hunan Province Directly Affiliated TCM Hospital), Zhuzhou, China
| | - Matthew Still
- Department of Bio-Medical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States
| | - Zhimeng Yao
- Institute of Precision Cancer Medicine and Pathology, School of Medicine, Department of General Surgery, The First Affiliated Hospital of Jinan University, Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, China
| | - Robert P. Coppes
- Departments of Biomedical Sciences of Cells and Systems, Section Molecular Cell Biology and Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Yunlong Pan
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Dianzheng Zhang
- Department of Bio-Medical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States
| | - Shegan Gao
- Henan Key Laboratory of Microbiome and Esophageal Cancer Prevention and Treatment, Henan Key Laboratory of Cancer Epigenetics, Cancer Hospital, The First Affiliated Hospital (College of Clinical Medicine) of Henan University of Science and Technology, Luoyang, China
- *Correspondence: Hao Zhang, ; Shegan Gao,
| | - Hao Zhang
- Department of General Surgery, The First Affiliated Hospital of Jinan University, Institute of Precision Cancer Medicine and Pathology, School of Medicine, Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou, China
- *Correspondence: Hao Zhang, ; Shegan Gao,
| |
Collapse
|
4
|
Gameiro A, Urbano AC, Ferreira F. Emerging Biomarkers and Targeted Therapies in Feline Mammary Carcinoma. Vet Sci 2021; 8:164. [PMID: 34437486 PMCID: PMC8402877 DOI: 10.3390/vetsci8080164] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/09/2021] [Accepted: 08/09/2021] [Indexed: 12/19/2022] Open
Abstract
Feline mammary carcinoma (FMC) is a common aggressive malignancy with a low survival rate that lacks viable therapeutic options beyond mastectomy. Recently, increasing efforts have been made to understand the molecular mechanisms underlying FMC development, using the knowledge gained from studies on human breast cancer to discover new diagnostic and prognostic biomarkers, thus reinforcing the utility of the cat as a cancer model. In this article, we review the current knowledge on FMC pathogenesis, biomarkers, and prognosis factors and offer new insights into novel therapeutic options for HER2-positive and triple-negative FMC subtypes.
Collapse
Affiliation(s)
| | | | - Fernando Ferreira
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal; (A.G.); (A.C.U.)
| |
Collapse
|
5
|
Ye M, Huang W, Liu R, Kong Y, Liu Y, Chen X, Xu J. Synergistic Activity of the HSP90 Inhibitor Ganetespib With Lapatinib Reverses Acquired Lapatinib Resistance in HER2-Positive Breast Cancer Cells. Front Pharmacol 2021; 12:651516. [PMID: 34290605 PMCID: PMC8287059 DOI: 10.3389/fphar.2021.651516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 06/23/2021] [Indexed: 11/23/2022] Open
Abstract
Lapatinib is an FDA-approved EGFR and HER2 tyrosine kinase inhibitor for the treatment of HER2-positive breast cancer patients. However, its therapeutic efficacy is limited by primary or acquired resistance. In the present study, we established breast cancers cells with acquired lapatinib resistance and investigated the antitumor activity of the second-generation HSP90 inhibitor ganetespib in association with lapatinib in lapatinib-sensitive and -resistant cells. The combination treatment showed synergistic inhibition of HER and the downstream PI3K/Akt and Ras/MEK/ERK pathways, in addition to enhancing induction of early apoptotic cell death and G1 arrest in both parent and lapatinib-resistant cells in vitro. The joint administration of ganetespib and lapatinib depleted the aberrant nuclear transcription factor STAT3, a mediator of the cell cycle and apoptosis-related pathways that is probably involved in the lapatinib resistance of HER2-positive breast cancer cells. In conjunctive with the augmented inhibition of tumor growth observed in both SKBR3 and SKBR3-L xenografts compared to monotherapy, our data provide a sound preclinical basis for combination treatment with lapatinib and ganetespib for refractory HER2-positive breast cancer.
Collapse
Affiliation(s)
- Min Ye
- School of Pharmacy, Fujian Medical University, Fuzhou, China
- Fuijan Provincial Key Laboratory of Natural Medicine Pharmacology, Fuzhou, China
| | - Wei Huang
- School of Pharmacy, Fujian Medical University, Fuzhou, China
- College of Life Sciences, Fujian Agriculature and Forestry University, Fuzhou, China
| | - Rui Liu
- School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Yingli Kong
- School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Yang Liu
- School of Pharmacy, Fujian Medical University, Fuzhou, China
- Fuijan Provincial Key Laboratory of Natural Medicine Pharmacology, Fuzhou, China
| | - Xiaole Chen
- School of Pharmacy, Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, Fuzhou, China
| | - Jianhua Xu
- School of Pharmacy, Fujian Medical University, Fuzhou, China
- Fuijan Provincial Key Laboratory of Natural Medicine Pharmacology, Fuzhou, China
| |
Collapse
|
6
|
Wang BW, Huang CH, Liu LC, Cheng FJ, Wei YL, Lin YM, Wang YF, Wei CT, Chen Y, Chen YJ, Huang WC. Pim1 Kinase Inhibitors Exert Anti-Cancer Activity Against HER2-Positive Breast Cancer Cells Through Downregulation of HER2. Front Pharmacol 2021; 12:614673. [PMID: 34267653 PMCID: PMC8276059 DOI: 10.3389/fphar.2021.614673] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 06/17/2021] [Indexed: 11/25/2022] Open
Abstract
The proviral integration site for moloney murine leukemia virus 1 (Pim1) is a serine/threonine kinase and able to promote cell proliferation, survival and drug resistance. Overexpression of Pim1 has been observed in many cancer types and is associated with the poor prognosis of breast cancer. However, it remains unclear whether Pim1 kinase is a potential therapeutic target for breast cancer patients. In this study, we found that Pim1 expression was strongly associated with HER2 expression and that HER2-overexpressing breast cancer cells were more sensitive to Pim1 inhibitor-induced inhibitions of cell viability and metastatic ability. Mechanistically, Pim1 inhibitor suppressed the expression of HER2 at least in part through transcriptional level. More importantly, Pim1 inhibitor overcame the resistance of breast cancer cells to HER2 tyrosine kinase inhibitor lapatinib. In summary, downregulation of HER2 by targeting Pim1 may be a promising and effective therapeutic approach not only for anti-cancer growth but also for circumventing lapatinib resistance in HER2-positive breast cancer patients.
Collapse
Affiliation(s)
- Bo-Wei Wang
- Graduate Institute of Biomedical Sciences, Center for Molecular Medicine and Research Center for Cancer Biology, China Medical University, Taichung, Taiwan
| | - Chih-Hao Huang
- Division of Breast Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Liang-Chih Liu
- Division of Breast Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Fang-Ju Cheng
- Graduate Institute of Biomedical Sciences, Center for Molecular Medicine and Research Center for Cancer Biology, China Medical University, Taichung, Taiwan
| | - Ya-Ling Wei
- Graduate Institute of Biomedical Sciences, Center for Molecular Medicine and Research Center for Cancer Biology, China Medical University, Taichung, Taiwan
| | - Yueh-Ming Lin
- Division of Colorectal Surgery, Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yu-Fei Wang
- Graduate Institute of Biomedical Sciences, Center for Molecular Medicine and Research Center for Cancer Biology, China Medical University, Taichung, Taiwan
| | - Ching-Ting Wei
- School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan
| | - Yeh Chen
- Institute of New Drug Development, China Medical University, Taichung, Taiwan
| | - Yun-Ju Chen
- School of Medicine for International Students, I-Shou University, Kaohsiung, Taiwan.,Department of Medical Research, E-Da Hospital, Kaohsiung, Taiwan
| | - Wei-Chien Huang
- Graduate Institute of Biomedical Sciences, Center for Molecular Medicine and Research Center for Cancer Biology, China Medical University, Taichung, Taiwan.,Drug Development Center, China Medical University, Taichung, Taiwan.,Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung, Taiwan.,The Ph.D. Program for Cancer Biology and Drug Discovery, China Medical University and Academia Sinica, Taichung, Taiwan
| |
Collapse
|
7
|
Borrero-García LD, Del Mar Maldonado M, Medina-Velázquez J, Troche-Torres AL, Velazquez L, Grafals-Ruiz N, Dharmawardhane S. Rac inhibition as a novel therapeutic strategy for EGFR/HER2 targeted therapy resistant breast cancer. BMC Cancer 2021; 21:652. [PMID: 34074257 PMCID: PMC8170972 DOI: 10.1186/s12885-021-08366-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 05/17/2021] [Indexed: 11/10/2022] Open
Abstract
Background Even though targeted therapies are available for cancers expressing oncogenic epidermal growth receptor (EGFR) and (or) human EGFR2 (HER2), acquired or intrinsic resistance often confounds therapy success. Common mechanisms of therapy resistance involve activating receptor point mutations and (or) upregulation of signaling downstream of EGFR/HER2 to Akt and (or) mitogen activated protein kinase (MAPK) pathways. However, additional pathways of resistance may exist thus, confounding successful therapy. Methods To determine novel mechanisms of EGFR/HER2 therapy resistance in breast cancer, gefitinib or lapatinib resistant variants were created from SKBR3 breast cancer cells. Syngenic therapy sensitive and resistant SKBR3 variants were characterized for mechanisms of resistance by mammosphere assays, viability assays, and western blotting for total and phospho proteins. Results Gefitinib and lapatinib treatments reduced mammosphere formation in the sensitive cells, but not in the therapy resistant variants, indicating enhanced mesenchymal and cancer stem cell-like characteristics in therapy resistant cells. The therapy resistant variants did not show significant changes in known therapy resistant pathways of AKT and MAPK activities downstream of EGFR/HER2. However, these cells exhibited elevated expression and activation of the small GTPase Rac, which is a pivotal intermediate of GFR signaling in EMT and metastasis. Therefore, the potential of the Rac inhibitors EHop-016 and MBQ-167 to overcome therapy resistance was tested, and found to inhibit viability and induce apoptosis of therapy resistant cells. Conclusions Rac inhibition may represent a viable strategy for treatment of EGFR/HER2 targeted therapy resistant breast cancer. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-021-08366-7.
Collapse
Affiliation(s)
- Luis D Borrero-García
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Maria Del Mar Maldonado
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Julia Medina-Velázquez
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Angel L Troche-Torres
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Luis Velazquez
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Nilmary Grafals-Ruiz
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Suranganie Dharmawardhane
- Department of Biochemistry, School of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico.
| |
Collapse
|
8
|
Gameiro A, Almeida F, Nascimento C, Correia J, Ferreira F. Tyrosine Kinase Inhibitors Are Promising Therapeutic Tools for Cats with HER2-Positive Mammary Carcinoma. Pharmaceutics 2021; 13:pharmaceutics13030346. [PMID: 33800900 PMCID: PMC8002158 DOI: 10.3390/pharmaceutics13030346] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 02/28/2021] [Accepted: 03/02/2021] [Indexed: 12/21/2022] Open
Abstract
Feline mammary carcinoma (FMC) is a common neoplasia in cat, being HER2-positive the most prevalent subtype. In woman’s breast cancer, tyrosine kinase inhibitors (TKi) are used as a therapeutic option, by blocking the phosphorylation of the HER2 tyrosine kinase domain. Moreover, clinical trials demonstrated that TKi produce synergistic antiproliferative effects in combination with mTOR inhibitors, overcoming resistance to therapy. Thus, to uncover new chemotherapeutic strategies for cats, the antiproliferative effects of two TKi (lapatinib and neratinib), and their combination with a mTOR inhibitor (rapamycin), were evaluated in FMC cell lines (CAT-M, FMCp and FMCm) and compared with a human breast cancer cell line (SkBR-3). Results revealed that both TKi induced antiproliferative effects in all feline cell lines, by blocking the phosphorylation of EGFR members and its downstream effectors. Furthermore, combined treatments with rapamycin presented synergetic antiproliferative effects. Additionally, the DNA sequence of the her2 TK domain (exons 18 to 20) was determined in 40 FMC tissue samples, and despite several mutations were found none of them were described as inducing resistance to therapy. Altogether, our results demonstrated that TKi and combined protocols may be useful in the treatment of cats with mammary carcinomas, and that TKi-resistant FMC are rare.
Collapse
Affiliation(s)
- Andreia Gameiro
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal; (A.G.); (F.A.); (C.N.); (J.C.)
| | - Filipe Almeida
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal; (A.G.); (F.A.); (C.N.); (J.C.)
- Antiviral Resistance Laboratory, Infectious Diseases Department, National Institute of Health Dr. Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
| | - Catarina Nascimento
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal; (A.G.); (F.A.); (C.N.); (J.C.)
| | - Jorge Correia
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal; (A.G.); (F.A.); (C.N.); (J.C.)
| | - Fernando Ferreira
- CIISA—Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal; (A.G.); (F.A.); (C.N.); (J.C.)
- Correspondence: ; Tel.: +351-21-365-2800 (ext. 431234)
| |
Collapse
|
9
|
Zheng Q, Zhang M, Zhou F, Zhang L, Meng X. The Breast Cancer Stem Cells Traits and Drug Resistance. Front Pharmacol 2021; 11:599965. [PMID: 33584277 PMCID: PMC7876385 DOI: 10.3389/fphar.2020.599965] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022] Open
Abstract
Drug resistance is a major challenge in breast cancer (BC) treatment at present. Accumulating studies indicate that breast cancer stem cells (BCSCs) are responsible for the BC drugs resistance, causing relapse and metastasis in BC patients. Thus, BCSCs elimination could reverse drug resistance and improve drug efficacy to benefit BC patients. Consequently, mastering the knowledge on the proliferation, resistance mechanisms, and separation of BCSCs in BC therapy is extremely helpful for BCSCs-targeted therapeutic strategies. Herein, we summarize the principal BCSCs surface markers and signaling pathways, and list the BCSCs-related drug resistance mechanisms in chemotherapy (CT), endocrine therapy (ET), and targeted therapy (TT), and display therapeutic strategies for targeting BCSCs to reverse drug resistance in BC. Even more importantly, more attention should be paid to studies on BCSC-targeted strategies to overcome the drug resistant dilemma of clinical therapies in the future.
Collapse
Affiliation(s)
- Qinghui Zheng
- Department of Breast Surgery, Zhejiang Provincial People's Hospital, Hangzhou, China
| | - Mengdi Zhang
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, China
| | - Fangfang Zhou
- Institutes of Biology and Medical Science, Soochow University, Suzhou, China
| | - Long Zhang
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, China
| | - Xuli Meng
- Department of Breast Surgery, Zhejiang Provincial People's Hospital, Hangzhou, China
| |
Collapse
|
10
|
Lamie PF, El-Kalaawy AM, Abdel Latif NS, Rashed LA, Philoppes JN. Pyrazolo[3,4-d]pyrimidine-based dual EGFR T790M/HER2 inhibitors: Design, synthesis, structure-activity relationship and biological activity as potential antitumor and anticonvulsant agents. Eur J Med Chem 2021; 214:113222. [PMID: 33545637 DOI: 10.1016/j.ejmech.2021.113222] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 11/17/2022]
Abstract
A new series of pyrazolo[3,4-d]pyrimidine/triazine hybrids 6a-r was designed as antitumor and anticonvulsant agents. All the prepared compounds were evaluated against colon (HCT-116), breast (MCF-7) and normal human fibroblast (WI38) cell lines. The most potent derivatives against HCT-116 and MCF-7 cells were 6o and 6q, with IC50 = 4.80 and 6.50 nM, respectively, when compared to lapatinib, the reference drug (IC50 = 12.00 and 21.00 nM, on HCT-116 and MCF-7, sequentially). All other derivatives exhibited good to moderate cytotoxic activity. Four compounds 6f, 6j, 6o and 6q were evaluated for their EGFR T790M/HER2 inhibitory activity. They revealed 81.81-65.70% and 86.66-54.49% inhibitory activity against EGFR T790M and HER2 in a sequent. The most potent derivatives 6o and 6q were further estimated for cell cycle analysis showing pre G1 apoptotic activity and cell growth arrest at G2/M phase. Apoptotic marker proteins expression levels (caspase-3/7/9, Bax and Bcl-2) were measured for 6o and 6q. They showed pro-apoptotic effect by increasing caspase-3/7/9 protein levels and Bax/Bcl-2 ratio. Moreover, anticonvulsant activity for the prepared compounds 6a-r were evaluated in vivo using lithium-pilocarpine mice model of Status Epilepticus. EEG changes where recorded and MDA, GSH, GABA and glutamate were measured in brain tissue of different groups. All tested compounds revealed variable anti-epileptic effects, the most potent compounds were 6b and 6m. Also 6d, 6e, 6h, 6i, 6k, 6l and 6n compounds exhibited good anti-seizure activity, while compound 6j showed the lower activity. The rest of compounds displayed a neutral activity.
Collapse
Affiliation(s)
- Phoebe F Lamie
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt.
| | - Asmaa M El-Kalaawy
- Department of Pharmacology, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Noha S Abdel Latif
- Department of Medical Pharmacology, Faculty of Medicine, Cairo University, Egypt
| | - Laila A Rashed
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Cairo University, Egypt
| | - John N Philoppes
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| |
Collapse
|
11
|
Huang T, Luo X, Wu B, Peng P, Dai Y, Hu G, Qiu H, Yuan X. Pyrotinib enhances the radiosensitivity of HER2‑overexpressing gastric and breast cancer cells. Oncol Rep 2020; 44:2634-2644. [PMID: 33125154 PMCID: PMC7640366 DOI: 10.3892/or.2020.7820] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 08/31/2020] [Indexed: 02/07/2023] Open
Abstract
The overexpression or amplification of HER2 has been observed in a significant proportion of both gastric cancer (GC) and breast cancer (BC) cases. Pyrotinib is an irreversible dual (EGFR/HER2) tyrosine kinase inhibitor (TKI), newly evaluated for the treatment of HER2-overexpressing cancer types. As radiotherapy (RT) serves a crucial role in controlling the local recurrence of GC and BC, the present study investigated the impact of pyrotinib on the irradiation response. The current results demonstrated that pyrotinib enhanced the radiosensitivity of HER2-overexpressing GC and BC cells in vitro and in vivo. In both NCI-N87 and SKBR3 cells, pyrotinib suppressed the irradiation-induced HER2 nuclear transport. Furthermore, pyrotinib increased DNA damage induced by irradiation in both cancer cell lines. Pyrotinib also enhanced the cytotoxicity of docetaxel, which may provide a novel strategy for potential drug combinations. Thus, pyrotinib is a promising irradiation sensitizer in patients with HER2-overexpressing GC and BC. The present results provide a theoretical foundation for further clinical evaluation of pyrotinib.
Collapse
Affiliation(s)
- Tingting Huang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Xiaoxiao Luo
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Bili Wu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Ping Peng
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Yuhong Dai
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Guangyuan Hu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Hong Qiu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Xianglin Yuan
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| |
Collapse
|
12
|
Im JY, Kim DM, Park H, Kang MJ, Kim DY, Chang KY, Kim BK, Won M. VGLL1 phosphorylation and activation promotes gastric cancer malignancy via TGF-β/ERK/RSK2 signaling. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1868:118892. [PMID: 33069758 DOI: 10.1016/j.bbamcr.2020.118892] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 12/27/2022]
Abstract
We previously reported that vestigial-like 1 (VGLL1), a cofactor of transcriptional enhanced associate domain 4 (TEAD4), is transcriptionally regulated by PI3K and β-catenin signaling and is involved in gastric cancer malignancy. However, the precise mechanism underlying the regulation of VGLL1 activation remains unknown. Therefore, we aimed to investigate the molecular mechanism underlying the transforming growth factor-β (TGF-β)-mediated activation of VGLL1 and the VGLL1-TEAD4 interaction in gastric cancer cells. We showed that TGF-β enhanced VGLL1 phosphorylation and that this phosphorylated VGLL1 functioned as a transcription cofactor of TEAD4 in NUGC3 cells. TGF-β also increased the phosphorylation of ERK and ribosomal S6 kinase 2 (RSK2) in NUGC3 cells, thereby triggering the translocation of phosphorylated RSK2 to the nucleus. Site-directed mutagenesis and immunoprecipitation experiments revealed that RSK2 phosphorylated VGLL1 at S84 in the presence of TGF-β. Mutation of VGLL1 at S84 suppressed VGLL1-TEAD4 binding and the subsequent transcriptional activation of matrix metalloprotease 9 (MMP9). Moreover, VGLL1 peptide containing S84 suppressed the TGF-β-induced MMP9 expression and reduced the invasion and proliferation of gastric cancer cells, whereas VGLL1 peptide containing S84A did not. Furthermore, suppression of expression or activation of VGLL1 enhances the therapeutic effects of lapatinib. Collectively, these results indicate that VGLL1 phosphorylation via TGF-β/ERK/RSK2 signaling plays a crucial role in MMP9-mediated malignancy of gastric cancer. In addition, our study highlights the therapeutic potential of the peptide containing VGLL1 S84 for the treatment of gastric cancer.
Collapse
Affiliation(s)
- Joo-Young Im
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea
| | - Da-Mi Kim
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea
| | - Hyunkyung Park
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea
| | - Mi-Jung Kang
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea
| | - Da-Yoon Kim
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea
| | - Kwan Young Chang
- R&D Center, OneCureGEN Co., Ltd, Daejeon, 34141, Republic of Korea
| | - Bo-Kyung Kim
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea.
| | - Misun Won
- Personalized Genomic Medicine Research Center, KRIBB, Daejeon, 34141, Republic of Korea; KRIBB School of Bioscience, University of Science and Technology, Daejeon, 34113, Republic of Korea; R&D Center, OneCureGEN Co., Ltd, Daejeon, 34141, Republic of Korea,.
| |
Collapse
|
13
|
Adjibade P, Simoneau B, Ledoux N, Gauthier WN, Nkurunziza M, Khandjian EW, Mazroui R. Treatment of cancer cells with Lapatinib negatively regulates general translation and induces stress granules formation. PLoS One 2020; 15:e0231894. [PMID: 32365111 PMCID: PMC7197775 DOI: 10.1371/journal.pone.0231894] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 04/02/2020] [Indexed: 12/22/2022] Open
Abstract
Stress granules (SG) are cytoplasmic RNA granules that form during various types of stress known to inhibit general translation, including oxidative stress, hypoxia, endoplasmic reticulum stress (ER), ionizing radiations or viral infection. Induction of these SG promotes cell survival in part through sequestration of proapoptotic molecules, resulting in the inactivation of cell death pathways. SG also form in cancer cells, but studies investigating their formation upon treatment with chemotherapeutics are very limited. Here we identified Lapatinib (Tykerb / Tyverb®), a tyrosine kinase inhibitor used for the treatment of breast cancers as a new inducer of SG in breast cancer cells. Lapatinib-induced SG formation correlates with the inhibition of general translation initiation which involves the phosphorylation of the translation initiation factor eIF2α through the kinase PERK. Disrupting PERK-SG formation by PERK depletion experiments sensitizes resistant breast cancer cells to Lapatinib. This study further supports the assumption that treatment with anticancer drugs activates the SG pathway, which may constitute an intrinsic stress response used by cancer cells to resist treatment.
Collapse
Affiliation(s)
- Pauline Adjibade
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Centre de Recherche en Cancérologie, Centre de Recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
| | - Bryan Simoneau
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Centre de Recherche en Cancérologie, Centre de Recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
| | - Nassim Ledoux
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Centre de Recherche en Cancérologie, Centre de Recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
| | - William-Naud Gauthier
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Centre de Recherche en Cancérologie, Centre de Recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
| | - Melisse Nkurunziza
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Centre de Recherche en Cancérologie, Centre de Recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
| | - Edouard W. Khandjian
- Département de Psychiatrie et de Neurosciences, Centre de Recherche, Institut Universitaire en Santé mentale de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
| | - Rachid Mazroui
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Centre de Recherche en Cancérologie, Centre de Recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Parti Québécois, Canada
- * E-mail:
| |
Collapse
|
14
|
Alkahtani HM, Abdalla AN, Obaidullah AJ, Alanazi MM, Almehizia AA, Alanazi MG, Ahmed AY, Alwassil OI, Darwish HW, Abdel-Aziz AAM, El-Azab AS. Synthesis, cytotoxic evaluation, and molecular docking studies of novel quinazoline derivatives with benzenesulfonamide and anilide tails: Dual inhibitors of EGFR/HER2. Bioorg Chem 2020; 95:103461. [PMID: 31838290 DOI: 10.1016/j.bioorg.2019.103461] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 09/11/2019] [Accepted: 11/20/2019] [Indexed: 12/19/2022]
Abstract
We synthesized a new series of 2-[(3-(4-sulfamoylphenethyl)-4(3H)-quinazolinon-2-yl)thio]anilide derivatives (2-16) and evaluated their cytotoxic activity against breast adenocarcinoma (MCF-7), colorectal adenocarcinoma (HT-29), and acute myeloid leukemia (HL-60 and K562) cells. To reveal their selectivity toward cancer cells, the compounds were also tested against the human fibroblast cell line, MRC-5. Compounds 1-5 exhibited potent cytotoxic activity against the tested cell lines with IC50 values of 0.65-3.86, 0.68-4.60, 0.41-1.45, 0.42-4.07, and 3.77-25.55 μM, respectively compared to sorafenib, the standard drug (IC50 2.50, 2.50, and 3.14 μM against MCF-7, HT-29, and HL60 cells, respectively). Interestingly, compounds 1-5 displayed selectivity toward the cancer cell lines over MRC-5 (IC50 3.77-25.55 μM). These compounds also displayed potent inhibitory activity against EGFR and HER2 kinases (IC50 0.09-0.43 and 0.15-0.33 μM, respectively) compared to the standard drug, sorafenib (IC50 0.11 and 0.13 μM, respectively). Likewise, compounds 1, 4, and 5 showed strong inhibitory activity against VEGFR2 (IC50 0.34, 0.28 and 0.39 μM, respectively) compared to sorafenib (IC50 0.17 μM). We also employed molecular docking to identify the structural features required for the EGFR/HER2 inhibitory activity of the new series. Ultimately, compounds 1, 4, and 5 were demonstrated to be candidates for further preclinical investigations.
Collapse
Affiliation(s)
- Hamad M Alkahtani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
| | - Ashraf N Abdalla
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia.
| | - Ahmad J Obaidullah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohammed M Alanazi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Abdulrahman A Almehizia
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mashael G Alanazi
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Ahmed Y Ahmed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Osama I Alwassil
- Department of Pharmaceutical Sciences, College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, 3163, P.O. Box 3660, Riyadh 11481, Saudi Arabia
| | - Hany W Darwish
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Alaa A-M Abdel-Aziz
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Adel S El-Azab
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
| |
Collapse
|
15
|
Mele L, la Noce M, Paino F, Regad T, Wagner S, Liccardo D, Papaccio G, Lombardi A, Caraglia M, Tirino V, Desiderio V, Papaccio F. Glucose-6-phosphate dehydrogenase blockade potentiates tyrosine kinase inhibitor effect on breast cancer cells through autophagy perturbation. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:160. [PMID: 30987650 PMCID: PMC6466760 DOI: 10.1186/s13046-019-1164-5] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/01/2019] [Indexed: 02/21/2023]
Abstract
Background Glucose-6-phospate dehydrogenase (G6PD) is the limiting enzyme of the pentose phosphate pathway (PPP) correlated to cancer progression and drug resistance. We previously showed that G6PD inhibition leads to Endoplasmic Reticulum (ER) stress often associated to autophagy deregulation. The latter can be induced by target-based agents such as Lapatinib, an anti-HER2 tyrosine kinase inhibitor (TKI) largely used in breast cancer treatment. Methods Here we investigate whether G6PD inhibition causes autophagy alteration, which can potentiate Lapatinib effect on cancer cells. Immunofluorescence and flow cytometry for LC3B and lysosomes tracker were used to study autophagy in cells treated with lapatinib and/or G6PD inhibitors (polydatin). Immunoblots for LC3B and p62 were performed to confirm autophagy flux analyses together with puncta and colocalization studies. We generated a cell line overexpressing G6PD and performed synergism studies on cell growth inhibition induced by Lapatinib and Polydatin using the median effect by Chou-Talay. Synergism studies were additionally validated with apoptosis analysis by annexin V/PI staining in the presence or absence of autophagy blockers. Results We found that the inhibition of G6PD induced endoplasmic reticulum stress, which was responsible for the deregulation of autophagy flux. Indeed, G6PD blockade caused a consistent increase of autophagosomes formation independently from mTOR status. Cells engineered to overexpress G6PD became resilient to autophagy and resistant to lapatinib. On the other hand, G6PD inhibition synergistically increased lapatinib-induced cytotoxic effect on cancer cells, while autophagy blockade abolished this effect. Finally, in silico studies showed a significant correlation between G6PD expression and tumour relapse/resistance in patients. Conclusions These results point out that autophagy and PPP are crucial players in TKI resistance, and highlight a peculiar vulnerability of breast cancer cells, where impairment of metabolic pathways and autophagy could be used to reinforce TKI efficacy in cancer treatment.
Collapse
Affiliation(s)
- Luigi Mele
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy
| | - Marcella la Noce
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy
| | - Francesca Paino
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | - Tarik Regad
- Department Precision Medicine, University of Campania "Luigi Vanvitelli", 80138, Naples, Italy.,The John van Geest Cancer Research Centre, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK
| | - Sarah Wagner
- The John van Geest Cancer Research Centre, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK
| | - Davide Liccardo
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy
| | - Gianpaolo Papaccio
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy.
| | - Angela Lombardi
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy
| | - Michele Caraglia
- Department Precision Medicine, University of Campania "Luigi Vanvitelli", 80138, Naples, Italy.,Molecular Oncology Laboratory, Biogem Scarl, Ariano Irpino, Avellino, Italy
| | - Virginia Tirino
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy
| | - Vincenzo Desiderio
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy.
| | - Federica Papaccio
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via Luciano Armanni, 5, 80138 Napoli, Naples, Italy
| |
Collapse
|
16
|
Zaal EA, Berkers CR. The Influence of Metabolism on Drug Response in Cancer. Front Oncol 2018; 8:500. [PMID: 30456204 PMCID: PMC6230982 DOI: 10.3389/fonc.2018.00500] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 10/15/2018] [Indexed: 12/23/2022] Open
Abstract
Resistance to therapeutic agents, either intrinsic or acquired, is currently a major problem in the treatment of cancers and occurs in virtually every type of anti-cancer therapy. Therefore, understanding how resistance can be prevented, targeted and predicted becomes increasingly important to improve cancer therapy. In the last decade, it has become apparent that alterations in cellular metabolism are a hallmark of cancer cells and that a rewired metabolism is essential for rapid tumor growth and proliferation. Recently, metabolic alterations have been shown to play a role in the sensitivity of cancer cells to widely-used first-line chemotherapeutics. This suggests that metabolic pathways are important mediators of resistance toward anticancer agents. In this review, we highlight the metabolic alterations associated with resistance toward different anticancer agents and discuss how metabolism may be exploited to overcome drug resistance to classical chemotherapy.
Collapse
Affiliation(s)
- Esther A. Zaal
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Celia R. Berkers
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| |
Collapse
|
17
|
Xiang Z, Huang X, Wang J, Zhang J, Ji J, Yan R, Zhu Z, Cai W, Yu Y. Cross-Database Analysis Reveals Sensitive Biomarkers for Combined Therapy for ERBB2+ Gastric Cancer. Front Pharmacol 2018; 9:861. [PMID: 30123134 PMCID: PMC6085474 DOI: 10.3389/fphar.2018.00861] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 07/17/2018] [Indexed: 12/13/2022] Open
Abstract
Exploring ERBB2-related pathways will help us finding sensitive molecules and potential combined therapeutic targets of ERBB2-targeted therapy for ERBB2+ gastric cancer (GC). In this study, we performed a cross-databases study focused on ERBB2+ GC. The data of ERBB2+ GC deposited in the cancer genome atlas (TCGA), gene expression omnibus (GEO), InBio MapTM, cancer cell line encyclopedia (CCLE), and cancer therapeutics response portal (CTRP) were analyzed. The correlation of expression levels of candidate and IC50 of candidate genes-targeted drugs were verified on NCI-N87 and MKN-45 GC cell lines. We found that RARA, THRA, CACNB1, and TOP2A are drug sensitive biomarkers of ERBB2-targeted treatment with FDA-approved drugs. All these genes act through Myc signaling pathway. Myc is the downstream hub gene of both ERBB2 and RARA. The expression of RARA, THRA, and CACNB1 were negatively correlated with Myc activation, while ERBB2 and TOP2A positively correlated with Myc activation. SH3BGRL3, SH3BGRL, and NRG2 were identified as potential ligands of ERBB2. The ERBB2+ GC with RARA amplification demonstrated better prognosis than those without RARA amplification, while overexpression of NRG2 and SH3BGRL correlated with poor prognosis in ERBB2+ GC. About 90% of ERBB2+ GC was compatible with chromosome instability (CIN) subtype of TCGA, which overlaps with intestinal-type GC in Lauren classification. In validating experiments, combination of Lapatinib and all-trans retinoic acid (ATRA) synergistically suppresses cell growth, and accompanied by decreased expression of MYC. In conclusions, we identified several predicting biomarkers for ERBB2-targeted therapy and corresponding histological features of ERBB2+ GC. Combination of ERBB2 antagonist or RARA agonist may be effective synergistic regimens for ERBB2+ GC.
Collapse
Affiliation(s)
- Zhen Xiang
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Xia Huang
- Department of Disease Prevention and Control, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiexuan Wang
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Jun Zhang
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Jun Ji
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Ranlin Yan
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Zhenggang Zhu
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Wei Cai
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| | - Yingyan Yu
- Department of Surgery, Ruijin Hospital, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai, China
| |
Collapse
|
18
|
Raimondi A, Nichetti F, Peverelli G, Di Bartolomeo M, De Braud F, Pietrantonio F. Genomic markers of resistance to targeted treatments in gastric cancer: potential new treatment strategies. Pharmacogenomics 2018; 19:1047-1068. [PMID: 30041572 DOI: 10.2217/pgs-2018-0077] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Gastric cancer is a highly heterogeneous disease, displaying a complex genomic landscape and an unfavorable outcome with standard therapies. Based on distinctive genomic alterations, novel targeted agents have been developed with the aim of personalizing treatments and improving patient outcome. However, a subgroup of patients is primarily treatment-resistant, and even in the initially sensitive population, secondary resistance emerges, thus limiting therapeutic benefit. In this review, we summarize the clinical data about standard targeted agents in gastric cancer, specifically anti-HER2 treatments and antivascular therapies. We also illustrate the available evidence regarding molecular mechanisms of resistance to these agents and we discuss potential strategies for new targeted treatments that could overcome such resistance.
Collapse
Affiliation(s)
- Alessandra Raimondi
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Federico Nichetti
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Giorgia Peverelli
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Maria Di Bartolomeo
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Filippo De Braud
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.,Department of Oncology & Hemato-oncology, University of Milan, Italy
| | - Filippo Pietrantonio
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.,Department of Oncology & Hemato-oncology, University of Milan, Italy
| |
Collapse
|
19
|
Milik SN, Abdel-Aziz AK, Lasheen DS, Serya RAT, Minucci S, Abouzid KAM. Surmounting the resistance against EGFR inhibitors through the development of thieno[2,3-d]pyrimidine-based dual EGFR/HER2 inhibitors. Eur J Med Chem 2018; 155:316-336. [PMID: 29902719 DOI: 10.1016/j.ejmech.2018.06.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/11/2018] [Accepted: 06/04/2018] [Indexed: 12/31/2022]
Abstract
In light of the emergence of resistance against the currently available EGFR inhibitors, our study focuses on tackling this problem through the development of dual EGFR/HER2 inhibitors with improved enzymatic affinities. Guided by the binding mode of the marketed dual EGFR/HER2 inhibitor, Lapatinib, we proposed the design of dual EGFR/HER2 inhibitors based on the 6-phenylthieno[2,3-d]pyrimidine as a core scaffold and hinge binder. After two cycles of screening aiming to identify the optimum aniline headgroup and solubilizing group, we eventually identified 27b as a dual EGFR/HER2 inhibitor with IC50 values of 91.7 nM and 1.2 μM, respectively. Notably, 27b dramatically reduced the viability of various patient-derived cancer cells preferentially overexpressing EGFR/HER2 (A431, MDA-MBA-361 and SKBr3 with IC50 values of 1.45, 3.5 and 4.83 μM, respectively). Additionally, 27b efficiently thwarted the proliferation of lapatinib-resistant human non-small lung carcinoma (NCI-H1975) cells, harboring T790 M mutation, with IC50 of 4.2 μM. Consistently, 27b significantly blocked EGF-induced EGFR activation and inactivated its downstream AKT/mTOR/S6 signalling pathway triggering apoptotic cell death in NCI-H1975 cells. The present study presents a promising candidate for further design and development of novel EGFR/HER2 inhibitors capable of overcoming EGFR TKIs resistance.
Collapse
Affiliation(s)
- Sandra N Milik
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, 11566, Egypt.
| | - Amal Kamal Abdel-Aziz
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, 11566, Egypt; Department of Experimental Oncology, European Institute of Oncology, Via Adamello 16, 20139, Milan, Italy
| | - Deena S Lasheen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, 11566, Egypt
| | - Rabah A T Serya
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, 11566, Egypt
| | - Saverio Minucci
- Department of Experimental Oncology, European Institute of Oncology, Via Adamello 16, 20139, Milan, Italy; Department of Biosciences, University of Milan, Milan, 20100, Italy
| | - Khaled A M Abouzid
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, 11566, Egypt.
| |
Collapse
|
20
|
Bai M, Song N, Che X, Wang X, Qu X, Liu Y. Chk1 activation attenuates sensitivity of lapatinib in HER2-positive gastric cancer. Cell Biol Int 2018; 42:781-793. [PMID: 29271513 DOI: 10.1002/cbin.10922] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 12/17/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Ming Bai
- Department of Medical Oncology; The First Hospital of China Medical University; Shenyang 110001 China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province; The First Hospital of China Medical University; Shenyang 110001 China
| | - Na Song
- Department of Medical Oncology; The First Hospital of China Medical University; Shenyang 110001 China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province; The First Hospital of China Medical University; Shenyang 110001 China
| | - Xiaofang Che
- Department of Medical Oncology; The First Hospital of China Medical University; Shenyang 110001 China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province; The First Hospital of China Medical University; Shenyang 110001 China
| | - Xiaoxun Wang
- Department of Medical Oncology; The First Hospital of China Medical University; Shenyang 110001 China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province; The First Hospital of China Medical University; Shenyang 110001 China
| | - Xiujuan Qu
- Department of Medical Oncology; The First Hospital of China Medical University; Shenyang 110001 China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province; The First Hospital of China Medical University; Shenyang 110001 China
| | - Yunpeng Liu
- Department of Medical Oncology; The First Hospital of China Medical University; Shenyang 110001 China
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province; The First Hospital of China Medical University; Shenyang 110001 China
| |
Collapse
|
21
|
Abstract
Approximately 20% of breast cancers have amplification of a cancer-causing signaling molecule known as human epidermal growth factor receptor 2 (HER2). Decreased mRNA expression of the autophagy gene, beclin 1/BECN1, increases the risk of HER2-positive breast cancer. However, the role of Beclin 1-dependent autophagy in regulating HER2-mediated tumorigenesis is unknown. Here, we show that a mutation in Becn1 that increases basal autophagy prevents HER2-mediated tumorigenesis in mice and prevents HER2-mediated inhibition of autophagy in cultured cells. Furthermore, treatment with a cell-penetrating, autophagy-inducing peptide derived from Beclin 1 inhibits growth of HER2-positive human breast tumor xenografts in mice as efficiently as a clinically used agent that inhibits HER2 receptor tyrosine kinase activity. These findings demonstrate that genetic and pharmacological activation of autophagy inhibits HER2-mediated breast tumorigenesis. Allelic loss of the autophagy gene, beclin 1/BECN1, increases the risk of patients developing aggressive, including human epidermal growth factor receptor 2 (HER2)-positive, breast cancers; however, it is not known whether autophagy induction may be beneficial in preventing HER2-positive breast tumor growth. We explored the regulation of autophagy in breast cancer cells by HER2 in vitro and the effects of genetic and pharmacological strategies to increase autophagy on HER2-driven breast cancer growth in vivo. Our findings demonstrate that HER2 interacts with Beclin 1 in breast cancer cells and inhibits autophagy. Mice with increased basal autophagy due to a genetically engineered mutation in Becn1 are protected from HER2-driven mammary tumorigenesis, and HER2 fails to inhibit autophagy in primary cells derived from these mice. Moreover, treatment of mice with HER2-positive human breast cancer xenografts with the Tat-Beclin 1 autophagy-inducing peptide inhibits tumor growth as effectively as a clinically used HER2 tyrosine kinase inhibitor (TKI). This inhibition of tumor growth is associated with a robust induction of autophagy, a disruption of HER2/Beclin 1 binding, and a transcriptional signature in the tumors distinct from that observed with HER2 TKI treatment. Taken together, these findings indicate that the HER2-mediated inhibition of Beclin 1 and autophagy likely contributes to HER2-mediated tumorigenesis and that strategies to block HER2/Beclin 1 binding and/or increase autophagy may represent a new therapeutic approach for HER2-positive breast cancers.
Collapse
|
22
|
Hu W, Tan C, He Y, Zhang G, Xu Y, Tang J. Functional miRNAs in breast cancer drug resistance. Onco Targets Ther 2018; 11:1529-1541. [PMID: 29593419 PMCID: PMC5865556 DOI: 10.2147/ott.s152462] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Owing to improved early surveillance and advanced therapy strategies, the current death rate due to breast cancer has decreased; nevertheless, drug resistance and relapse remain obstacles on the path to successful systematic treatment. Multiple mechanisms responsible for drug resistance have been elucidated, and miRNAs seem to play a major part in almost every aspect of cancer progression, including tumorigenesis, metastasis, and drug resistance. In recent years, exosomes have emerged as novel modes of intercellular signaling vehicles, initiating cell–cell communication through their fusion with target cell membranes, delivering functional molecules including miRNAs and proteins. This review particularly focuses on enumerating functional miRNAs involved in breast cancer drug resistance as well as their targets and related mechanisms. Subsequently, we discuss the prospects and challenges of miRNA function in drug resistance and highlight valuable approaches for the investigation of the role of exosomal miRNAs in breast cancer progression and drug resistance.
Collapse
Affiliation(s)
- Weizi Hu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University.,School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University.,Nanjing Medical University Affiliated Cancer Hospital
| | - Chunli Tan
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University.,School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University.,Nanjing Medical University Affiliated Cancer Hospital
| | - Yunjie He
- The First Clinical School of Nanjing Medical University
| | - Guangqin Zhang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University
| | - Yong Xu
- Nanjing Medical University Affiliated Cancer Hospital.,Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Nanjing Medical University, Nanjing, People's Republic of China
| | - Jinhai Tang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University
| |
Collapse
|
23
|
ErbB Family Signalling: A Paradigm for Oncogene Addiction and Personalized Oncology. Cancers (Basel) 2017; 9:cancers9040033. [PMID: 28417948 PMCID: PMC5406708 DOI: 10.3390/cancers9040033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/05/2017] [Accepted: 04/06/2017] [Indexed: 02/07/2023] Open
Abstract
ErbB family members represent important biomarkers and drug targets for modern precision therapy. They have gained considerable importance as paradigms for oncoprotein addiction and personalized medicine. This review summarizes the current understanding of ErbB proteins in cell signalling and cancer and describes the molecular rationale of prominent cases of ErbB oncoprotein addiction in different cancer types. In addition, we have highlighted experimental technologies for the development of innovative cancer cell models that accurately predicted clinical ErbB drug efficacies. In the future, such cancer models might facilitate the identification and validation of physiologically relevant novel forms of oncoprotein and non-oncoprotein addiction or synthetic lethality. The identification of genotype-drug response relationships will further advance personalized oncology and improve drug efficacy in the clinic. Finally, we review the most important drugs targeting ErbB family members that are under investigation in clinical trials or that made their way already into clinical routine. Taken together, the functional characterization of ErbB oncoproteins have significantly increased our knowledge on predictive biomarkers, oncoprotein addiction and patient stratification and treatment.
Collapse
|
24
|
Shen X, Zhi Q, Wang Y, Li Z, Zhou J, Huang J. Hypoxia Induces Multidrug Resistance via Enhancement of Epidermal Growth Factor-Like Domain 7 Expression in Non-Small Lung Cancer Cells. Chemotherapy 2017; 62:172-180. [PMID: 28351036 DOI: 10.1159/000456066] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 01/12/2017] [Indexed: 12/20/2022]
Abstract
Chemotherapy is widely used in non-small cell lung cancer (NSCLC) treatment, yet multidrug resistance (MDR) is a major chemotherapeutic obstacle in both resectable and advanced NSCLC. Epidermal growth factor-like domain 7 (EGFL7), also known as vascular endothelial stain, is an endothelial cell-derived secreted factor that regulates vascular tube formulation. The aim of this study was to investigate the potential relationships between EGFL7 and MDR in NSCLC cells. We first obtained the CDDP-based MDR phenotype cell line A549/CDDP by repeated exposure to a proper concentration of CDDP (cisplatin) from original A549 cells. These A549/CDDP cells, which maintained relative high levels of EGFL7 and P-glycoprotein (P-gp), were resistant to other chemotherapy drugs, such as carboplatin (CBP), paclitaxel (TAX), and gemcitabine (GEM) (p < 0.05). We also found that hypoxia significantly reduced the chemosensitivity of NSCLC cells, and hypoxia-induced MDR was mediated by P-gp and EGFL7 (p < 0.05). EGFL7 was veryy relevant to NSCLC cell MDR, and downregulation of EGFL7 could significantly increase the chemosensitivity of NSCLC cells (p < 0.05). Thus, our findings first indicate that hypoxia induced NSCLC cell MDR at least partly by enhancing the expression of EGFL7 protein. EGFL7 might be a feasible target for reversing hypoxia-mediated MDR in NSCLC cells and a promising biomarker for predicting the development of MDR in NSCLC patients on chemotherapy.
Collapse
Affiliation(s)
- Xiaochun Shen
- Department of Respiratory Medicine, The First Affiliated Hospital of Soochow University, Suzhou, China
| | | | | | | | | | | |
Collapse
|