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Roshani A, Mohammadi M, Bahadori T, Ahmadi Zare H, Judaki MA, Mobini M, Golsaz-Shirazi F, Jeddi-Tehrani M, Amiri MM, Shokri F. Comparison of different transient gene expression systems for the production of a new humanized anti-HER2 monoclonal antibody (Hersintuzumab). Daru 2023; 31:221-231. [PMID: 37695454 PMCID: PMC10624790 DOI: 10.1007/s40199-023-00477-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 08/05/2023] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND Producing therapeutic proteins can be done quickly and on a large scale through Transient Gene Expression (TGE). Chinese hamster ovary (CHO) cell lines are commonly used to achieve this. Although there are few comparative studies, TGE has been observed in suspension-adapted CHO cells. OBJECTIVES We tested TGE's effectiveness in DG-44, CHO-S, and ExpiCHO-S cell lines with four transfection reagents. METHODS A design of experiments (DoE) was followed to optimize transfection using a recombinant monoclonal antibody (mAb) construct. To evaluate the efficacy, flow cytometry and ELISA were used. Feeding strategies and temperature shifts were implemented to enhance transfection effectiveness. The quality of the mAb was assessed through ELISA, SDS-PAGE, and proliferation inhibition assays. RESULTS We adapted all cell lines to grow in suspension using a serum-free medium. Our findings from flow cytometry and ELISA tests indicate that PEI and Pmax reagents had a higher rate of transfection and mAb production than the ExpiCHO commercial transfection reagent. While DG-44 cells had better transfection efficiency than CHO-S and ExpiCHO-S, there was no significant difference between CHO-S and ExpiCHO-S. Our TGE system was more productive at 32 °C than at 37 °C. In the optimized TGE of Pmax-based transfection in DG-44 at 37 and 32 °C, the production level of mAb was more than half of the amount of the commercial ExpiCHO-S expression system. Still, the number of transfected cells was three times higher, making it more efficient. The purified mAb from all transfected cell lines had similar structural and functional properties under different conditions. CONCLUSION Our research shows that using Pmax and DG-44 cells in the TGE system is a cost-effective and efficient way to produce humanized monoclonal antibodies. We discovered that this method outperforms the ExpiCHO-S kit.
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Affiliation(s)
- Ali Roshani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Mohammadi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Tannaz Bahadori
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Hengameh Ahmadi Zare
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mohammad Ali Judaki
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Mobini
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Forough Golsaz-Shirazi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
| | - Mohammad Mehdi Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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Liu X, Luan L, Liu X, Jiang D, Deng J, Xu J, Yuan Y, Xing J, Chen B, Xing D, Huang H. A novel nanobody-based HER2-targeting antibody exhibits potent synergistic antitumor efficacy in trastuzumab-resistant cancer cells. Front Immunol 2023; 14:1292839. [PMID: 37954614 PMCID: PMC10634241 DOI: 10.3389/fimmu.2023.1292839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 10/16/2023] [Indexed: 11/14/2023] Open
Abstract
Human epithelial growth factor receptor-2 (HER2) plays an oncogenic role in numerous tumors, including breast, gastric, and various other solid tumors. While anti-HER2 therapies are approved for the treatment of HER2-positive tumors, a necessity persists for creating novel HER2-targeted agents to resolve therapeutic resistance. Utilizing a synthetic nanobody library and affinity maturation, our study identified four anti-HER2 nanobodies that exhibited high affinity and specificity. These nanobodies recognized three distinct epitopes of HER2-ECD. Additionally, we constructed VHH-Fc and discovered that they facilitated superior internalization and showed moderate growth inhibition. Compared to the combination of trastuzumab and pertuzumab, the VHH-Fc combos or their combination with trastuzumab demonstrated greater or comparable antitumor activity in both ligand-independent and ligand-driven tumors. Most remarkably, A9B5-Fc, which targeted domain I of HER2-ECD, displayed significantly enhanced trastuzumab-synergistic antitumor efficacy compared to pertuzumab under trastuzumab-resistant conditions. Our findings offer anti-HER2 nanobodies with high affinity and non-overlapping epitope recognition. The novel nanobody-based HER2-targeted antibody, A9B5-Fc, binding to HER2-ECD I, mediates promising receptor internalization. It possesses the potential to serve as a potent synergistic partner with trastuzumab, contributing to overcoming acquired resistance.
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Affiliation(s)
- Xinlin Liu
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Qingdao Cancer Institute, Qingdao, China
| | - Linli Luan
- Noventi Biopharmaceuticals Co., Ltd, Shanghai, China
| | - Xi Liu
- Bioworkshops (Suzhou) Limited, Souzhou, China
| | - Dingwen Jiang
- Noventi Biopharmaceuticals Co., Ltd, Shanghai, China
| | - Junwen Deng
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Qingdao Cancer Institute, Qingdao, China
| | - Jiazhen Xu
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Qingdao Cancer Institute, Qingdao, China
| | - Yang Yuan
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Qingdao Cancer Institute, Qingdao, China
| | - Jiyao Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Qingdao Cancer Institute, Qingdao, China
| | - Bingguan Chen
- Noventi Biopharmaceuticals Co., Ltd, Shanghai, China
| | - Dongming Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Qingdao Cancer Institute, Qingdao, China
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Haiming Huang
- Noventi Biopharmaceuticals Co., Ltd, Shanghai, China
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3
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Ramezani-Aliakbari K, Khaki-Bakhtiarvand V, Mahmoudian J, Asgarian-Omran H, Shokri F, Hojjat-Farsangi M, Jeddi-Tehrani M, Shabani M. Evaluation of the anti-tumor effects of an anti-Human Epidermal growth factor receptor 2 (HER2) monoclonal antibody in combination with CD11b +/Gr-1 + myeloid cells depletion using a recombinant peptibody in 4 T1-HER2 tumor model. Int Immunopharmacol 2023; 121:110463. [PMID: 37327513 DOI: 10.1016/j.intimp.2023.110463] [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: 04/13/2023] [Revised: 06/01/2023] [Accepted: 06/05/2023] [Indexed: 06/18/2023]
Abstract
INTRODUCTION Clinical efficacy of Human Epidermal growth factor Receptor 2 (HER2) targeted strategies is limited due to impaired anti-tumor responses negatively regulated by immunosuppressive cells. We thus, investigated the inhibitory effects of an anti-HER2 monoclonal antibody (1 T0 mAb) in combination with CD11b+/Gr-1+ myeloid cells depletion in 4 T1-HER2 tumor model. METHODS BALB/c mice were challenged with human HER2-expressing 4 T1 murine breast cancer cell line. A week post tumor challenge, each mouse received 50 µg of a myeloid cells specific peptibody every other day, or 10 mg/kg of 1 T0 mAb two times a week, and their combination for two weeks. The treatments effect on tumor growth was measured by calculating tumor size. Also, the frequencies of CD11b+/Gr-1+ cells and T lymphocytes were measured by flow cytometry. RESULTS Peptibody treated mice indicated tumor regression and 40 % of the mice eradicated their primary tumors. The peptibody was capable to deplete notably splenic CD11b+/Gr-1+ cells as well as intratumoral CD11b+/Gr-1+ cells (P < 0.0001) and led to an increased number of tumor infiltrating CD8+ T cells (3.3 folds) and also that of resident tumor draining lymph nodes (TDLNs) (3 folds). Combination of peptibody and 1 T0 mAb resulted in enhanced expansion of tumor infiltrating CD4 + and CD8+ T cells which was associated with tumor eradication in 60 % of the mice. CONCLUSIONS Peptibody is able to deplete CD11b+/Gr-1+ cells and increase anti-tumoral effects of the 1 T0 mAb in tumor eradication. Thus, this myeloid population have critical roles in development of tumors and their depletion is associated with induction of anti-tumoral responses.
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Affiliation(s)
| | - Vahid Khaki-Bakhtiarvand
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jafar Mahmoudian
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Hossein Asgarian-Omran
- Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hojjat-Farsangi
- Department of Oncology-Pathology, BioClinicum, Karolinska University Hospital Solna and Karolinska Institute, 17164 Stockholm, Sweden
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
| | - Mahdi Shabani
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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4
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Potent anti-tumor immune response and tumor growth inhibition induced by HER2 subdomain fusion protein in a mouse tumor model. J Cancer Res Clin Oncol 2022; 149:2437-2450. [PMID: 35737089 DOI: 10.1007/s00432-022-04084-0] [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: 04/12/2022] [Accepted: 05/20/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE Several approaches have so far been employed to establish anti-tumor immunity by targeting HER2 protein. Active immunization with recombinant HER2 subdomains has previously been demonstrated to induce potent immune response and tumor growth inhibition. In the present study, we investigated the immunogenicity and tumor inhibitory effect of a fusion protein consisting of human HER2 extracellular subdomain (ECD-DI + II) together with T-helper cell epitopes of Tetanus toxin (p2 and p30). METHODS BALB/c mice were immunized with two recombinant proteins (DI + II and p2p30-DI + II) emulsified in 4 different adjuvants. Anti-DI + II antibody response, cytokine profile, frequency of splenic CD25+FOXP3+ regulatory T cells (Tregs) and CD8+CD107a+ cytotoxic T lymphocytes (CTLs) were assessed in the immunized mice. To assess the anti-tumor effect, the immunized mice were subcutaneously challenged with HER2-overexpressing tumor cells and the tumor growth was determined. RESULTS Both recombinant proteins were able to induce comparable levels of ECD-DI + II-specific antibodies. Immunization with p2p30-DI + II resulted in a significant increase in the level of Interferon-gamma (IFN-γ) secretion compared to DI + II protein and significantly higher frequency of CTLs and lower frequency of Tregs. The number of mice that remained tumor-free until day 120 was significantly higher in p2p30-DI + II vaccinated groups. CONCLUSIONS Our data suggest that the p2p30-DI + II fusion protein together with CpG adjuvant induces more potent anti-tumor immune responses in a mouse tumor model. Accordingly, this formulation might be considered as a potential immunotherapeutic approach in HER2+ cancers.
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5
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Mohammadi M, Jeddi-Tehrani M, Golsaz-Shirazi F, Arjmand M, Bahadori T, Judaki MA, Shiravi F, Zare HA, Haghighat FN, Mobini M, Amiri MM, Shokri F. A Novel Anti-HER2 Bispecific Antibody With Potent Tumor Inhibitory Effects In Vitro and In Vivo. Front Immunol 2021; 11:600883. [PMID: 33679691 PMCID: PMC7927792 DOI: 10.3389/fimmu.2020.600883] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 12/23/2020] [Indexed: 01/14/2023] Open
Abstract
Overexpression of HER2 has been reported in many types of cancer, making it a perfect candidate for targeted immunotherapy. The combination of two FDA approved monoclonal antibodies (mAbs), trastuzumab and pertuzumab, has more robust anti-tumor activity in patients with HER2-overexpressing breast cancer. We recently produced a new humanized anti-HER2 mAb, hersintuzumab, which recognizes a different epitope than trastuzumab and pertuzumab on HER2. This mAb, in combination with trastuzumab, exhibits more potent anti-tumor activity than each parental mAb alone. Here we have developed a novel bispecific anti-HER2 antibody (BsAb) designated as trasintuzumab, composed of trastuzumab and hersintuzumab, using dual variable domain immunoglobulin (DVD-Ig) technology. Both variable domains of trasintuzumab are fully functional and have similar affinities to the parental mAbs and are also able to bind to natural HER2 on the surface of several HER2-expressing cell lines. Trasintuzumab was found to inhibit the growth of different types of tumor cell lines through suppression of the AKT and ERK signaling pathways as efficiently as the combination of the parental mAbs. It also induced tumor regression as potently as the combination of the two mAbs in nude mice bearing ovarian and gastric cancer xenografts. Our data suggest that trasintuzumab may be a promising BsAb therapeutic candidate for the treatment of HER2-overexpressing cancers.
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Affiliation(s)
- Mehdi Mohammadi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Forough Golsaz-Shirazi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Arjmand
- Department of Biochemistry, Pasteur Institute of Iran, Tehran, Iran
| | - Tannaz Bahadori
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Judaki
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Fariba Shiravi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Hengameh Ahmadi Zare
- Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Farzaneh Notash Haghighat
- Monoclonal Antibody Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Maryam Mobini
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Mehdi Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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6
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Mansouri-Fard S, Ghaedi M, Shokri MR, Bahadori T, Khoshnoodi J, Golsaz-Shirazi F, Jeddi-Tehrani M, Amiri MM, Shokri F. Inhibitory Effect of Polyclonal Antibodies Against HER3 Extracellular Subdomains on Breast Cancer Cell Lines. Asian Pac J Cancer Prev 2020; 21:439-447. [PMID: 32102522 PMCID: PMC7332115 DOI: 10.31557/apjcp.2020.21.2.439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Indexed: 11/25/2022] Open
Abstract
Objective: Human epidermal growth factor receptor 3 (HER3) is a unique member of the tyrosine kinase receptors with an inactive kinase domain and is the preferable dimerization partner for HER2 which lead to potent tumorigenic signaling. Methods: In this study, the expression plasmids coding for the human HER3 subdomains were transfected into CHO-K1 cells. Produced proteins were characterized by ELISA and SDS-PAGE. Rabbits were immunized and produced polyclonal antibodies (pAbs) that were characterized by ELISA, Immunoblotting and flowcytometry and their inhibitory effects were assessed by XTT on BT-474 and JIMT-1 breast cancer cell lines. Result: The recombinant subdomains were highly immunogenic in rabbits. The pAbs reacted with the recombinant subdomains as well as commercial HER3 and the native receptor on tumor cell membranes and could significantly inhibit growth of Trastuzumab sensitive (BT-474) and resistant (JIMT-1) breast cancer cell lines in vitro. Conclusion: It seems that HER3 extra cellular domains (ECD) induce a strong anti-tumor antibody response and may prove to be potentially useful for immunotherapeutic applications.
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Affiliation(s)
- Samaneh Mansouri-Fard
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mojgan Ghaedi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad-Reza Shokri
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Tannaz Bahadori
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Jalal Khoshnoodi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Forough Golsaz-Shirazi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mohammad Mehdi Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
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7
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Addressing cancer immunotherapy research in Iran: adoptive cell therapy on the horizon. Cytotherapy 2018; 20:1227-1237. [DOI: 10.1016/j.jcyt.2018.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 07/04/2018] [Accepted: 08/14/2018] [Indexed: 12/15/2022]
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8
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Soltantoyeh T, Bahadori T, Hosseini-Ghatar R, Khoshnoodi J, Roohi A, Mobini M, Golsaz-Shirazi F, Jeddi-Tehrani M, Amiri MM, Shokri F. Differential Effects of Inhibitory and Stimulatory Anti-HER2 Monoclonal Antibodies on AKT/ERK Signaling Pathways. Asian Pac J Cancer Prev 2018; 19:2255-2262. [PMID: 30139234 PMCID: PMC6171393 DOI: 10.22034/apjcp.2018.19.8.2255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Objective: Homo- and heterodimerization of the receptor tyrosine kinase HER2 hyperactivate several downstream signaling pathways, leading to uncontrolled growth and proliferation of tumor cells. Anti-HER2 monoclonal antibodies (mAbs) may induce different effects on HER2 dimerization and signaling. Methods: The effect of two inhibitory (2A8, 1T0) and one stimulatory (1H9) anti-HER2 mAbs either alone or in combination with trastuzumab was investigated on AKT and ERK signaling pathways and HER2 degradation in a human breast cancer cell line (BT-474) by Western blotting. Result: While 1H9 mAb had no significant effect on AKT and ERK signaling pathways, 1T0 and 2A8 mAbs inhibited phosphorylation of both pathways. Combination of 1T0 mAb with trastuzumab resulted in significant synergistic inhibition of both pathways and HER2 degradation, much more potently than the combination of trastuzumab and pertuzumab. Conclusion: Our data indicate that anti-HER2 mAbs may induce different signaling pathways depending on their effect on tumor cell growth and proliferation. The significant inhibition of ERK and AKT phosphorylation by 1T0 alone or particularly in combination with trastuzumab suggests its potential therapeutic application for targeted immunotherapy of HER2 overexpressing malignancies.
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Affiliation(s)
- Tahereh Soltantoyeh
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. and
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9
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Rahimi-Zarchi M, Shojaosadati SA, Amiri MM, Jeddi-Tehrani M, Shokri F. All-trans retinoic acid in combination with sodium butyrate enhances specific monoclonal antibody productivity in recombinant CHO cell line. Bioprocess Biosyst Eng 2018; 41:961-971. [PMID: 29619548 DOI: 10.1007/s00449-018-1927-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 03/22/2018] [Indexed: 12/12/2022]
Abstract
The effects of all-trans retinoic acid (RA) and sodium butyrate (NaBu) on growth, viability and antibody production of two types of transfected Chinese hamster ovary cell lines (CHO-K1 and CHO-S) were investigated using a batch mode cell culture. By adding 0.5 mM NaBu in the CHO-K1 cell culture, the cell specific productivity (Qp) and antibody concentration increased by five- and threefold, respectively. The optimal concentration of RA was 100 nM which resulted in twofold increase in antibody production. In a combination model, RA applied at early growth phase of CHO-K1 cells followed by addition of NaBu with lowering culture temperature at the end of stationary phase resulted in two- and threefold increase in Qp and final antibody concentration, respectively. The latter strategy was also applied on suspended CHO-S cells with enhanced Qp and antibody concentration, but to a lesser extent than the CHO-K1 cells. In conclusion, our results demonstrate that the addition of RA and NaBu along with lowering the culture temperature can increase cell culture period as well as Qp and the final concentration of recombinant monoclonal antibody in both CHO-K1 and CHO-S cells without any significant change in binding affinity of the mAb.
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Affiliation(s)
- Mahmood Rahimi-Zarchi
- Biotechnology Group, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | | | - Mohammad Mehdi Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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10
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Ahmadi M, Sadri-Ardalani F, Amiri MM, Jeddi-Tehrani M, Shabani M, Shokri F. Immunization with HER2 extracellular subdomain proteins induces cellular response and tumor growth inhibition in mice. Immunotherapy 2018; 10:511-524. [PMID: 29562854 DOI: 10.2217/imt-2017-0181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
AIM We investigated cellular and protective immune responses in mice vaccinated with recombinant HER2 extracellular subdomains. MATERIALS & METHODS Balb/C mice were immunized with recombinant full HER2 extracellular domain and subdomain proteins. Humoral and cellular immune response and antitumor effect was evaluated using a syngeneic mice tumor model. RESULTS All recombinant proteins induced secretion of IL-4 and particularly IFN-γ and IL-17 cytokines. Challenging of immunized mice with stable 4T1-HER2 transfected cells resulted in partial but significant tumor growth inhibition in all groups of mice particularly those immunized with fHER2-ECD together with CPG. CONCLUSION Our results suggest that the recombinant HER2-ECD subdomains induce mainly Th1 and Th17 responses, which seem to contribute to tumor growth inhibition in syngeneic mice.
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Affiliation(s)
- Moslem Ahmadi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Fateme Sadri-Ardalani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mohammad M Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mahdi Shabani
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
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11
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Hosseini Ghatar R, Soltantoyeh T, Bahadori T, Golara M, Hassannia H, Khosravi Eghbal R, Khoshnoodi J, Judaki MA, Golsaz-Shirazi F, Jeddi-Tehrani M, Amiri MM, Shokri F. Epitope Mapping of Human HER2 Specific Mouse Monoclonal Antibodies Using Recombinant Extracellular Subdomains. Asian Pac J Cancer Prev 2017; 18:3103-3110. [PMID: 29172286 PMCID: PMC5773798 DOI: 10.22034/apjcp.2017.18.11.3103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background: Human epidermal growth factor receptor 2 (HER2) is overexpressed in several human malignancies
and numerous studies have indicated that it plays important roles in the development and maintenance of the malignant
phenotype. Targeting of HER2 molecules with monoclonal antibodies (mAbs) is a promising therapeutic approach.
However, anti-HER2 mAbs affect cancer cells differently, depending on the distinct epitopes which are the targets.
Methods: Reactivity of a panel of 8 mouse anti-HER2 mAbs was investigated by ELISA and Western blotting using
different subdomains of the extracellular domain (ECD) of HER2. All subdomains, including I, II, III, IV, I+II,
III+IV and full HER2-ECD were constructed and expressed in CHO cells. Cross-reactivity of the mAbs with other
members of the human HER family and Cynomolgus HER2 was also studied by ELISA. The mAbs were also tested
by immunohistochemistry (IHC) using HER2 positive breast cancer tissues. Results: Our results demonstrated that 3
out of 8 mAbs detected conformational epitopes (1T0, 2A8 and 1B5), while 5 mAbs identified linear epitopes (1F2,
1H9, 4C7, 1H6 and 2A9). Three of the mAbs recognized subdomain I, one reacted with subdomain I+II, 2 recognized
either subdomain III or IV and 2 recognized subdomain III+IV. However, none of our mAbs recognized the subdomain
II alone. The mAbs displayed either inhibitory or stimulatory effects on HER2-overexpressing tumor cells and did not
react with other members of the human HER family. The pattern of IHC results implied better reactivity of the mAbs
recognizing linear epitopes. Conclusions: Our findings suggest that paired subdomains of HER2 are essential for
mapping of mAbs recognizing conformational epitopes. Moreover, there seems to be no association between subdomain
specificity and antitumor activity of our anti-HER2 mAbs.
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Affiliation(s)
- Reza Hosseini Ghatar
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. ,
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12
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Amiri MM, Golsaz-Shirazi F, Soltantoyeh T, Hosseini-Ghatar R, Bahadori T, Khoshnoodi J, Navabi SS, Farid S, Karimi-Jafari MH, Jeddi-Tehrani M, Shokri F. Hersintuzumab: A novel humanized anti-HER2 monoclonal antibody induces potent tumor growth inhibition. Invest New Drugs 2017; 36:171-186. [PMID: 28983766 DOI: 10.1007/s10637-017-0518-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Accepted: 09/22/2017] [Indexed: 01/30/2023]
Abstract
Humanized monoclonal antibodies (mAbs) against HER2 including trastuzumab and pertuzumab are widely used to treat HER2 overexpressing metastatic breast cancers. These two mAbs recognize distinct epitopes on HER2 and their combination induces a more potent blockade of HER2 signaling than trastuzumab alone. Recently, we have reported characterization of a new chimeric mAb (c-1T0) which binds to an epitope different from that recognized by trastuzumab and significantly inhibits proliferation of HER2 overexpressing tumor cells. Here, we describe humanization of this mAb by grafting all six complementarity determining regions (CDRs) onto human variable germline genes. Humanized VH and VL sequences were synthesized and ligated to human γ1 and κ constant region genes using splice overlap extension (SOE) PCR. Subsequently, the humanized antibody designated hersintuzumab was expressed and characterized by ELISA, Western blot and flow cytometry. The purified humanized mAb binds to recombinant HER2 and HER2-overexpressing tumor cells with an affinity comparable with the chimeric and parental mouse mAbs. It recognizes an epitope distinct from those recognized by trastuzumab and pertuzumab. Binding of hersintuzumab to HER2 overexpressing tumor cells induces G1 cell cycle arrest, inhibition of ERK and AKT signaling pathways and growth inhibition. Moreover, hersintuzumab could induce antibody-dependent cell cytotoxicity (ADCC) on BT-474 cells. This new humanized mAb is a potentially valuable tool for single or combination breast cancer therapy.
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Affiliation(s)
- Mohammad Mehdi Amiri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Forough Golsaz-Shirazi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Tahereh Soltantoyeh
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Hosseini-Ghatar
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Tannaz Bahadori
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Jalal Khoshnoodi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Shadi Sadat Navabi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Samira Farid
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | | | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Fazel Shokri
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. .,Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
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13
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Evolution of anti-HER2 therapies for cancer treatment. Cancer Treat Rev 2017; 59:1-21. [PMID: 28715775 DOI: 10.1016/j.ctrv.2017.06.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 06/21/2017] [Accepted: 06/23/2017] [Indexed: 01/13/2023]
Abstract
The development of HER2-directed monoclonal antibodies and tyrosine kinase inhibitors have provided benefits to cancer patients, as well as produced many insights into the biology of the ErbB receptor family. Current therapies based on ErbB family members have resulted in improved overall survival with associated improvements in quality of life for the cancer patients that respond to treatment. Compared to monotherapy using either two antibodies to block the HER2 receptor blockade or combinatorial approaches with HER2 antibodies and standard therapies has provided additional benefits. Despite the therapeutic success of existing HER2 therapies, personalising treatment and overcoming resistance to these therapies remains a significant challenge. The heterogeneous intra-tumoural HER2 expression and lack of fully predictive and prognostic biomarkers remain significant barriers to improving the use of HER2 antibodies. Imaging modalities using radiolabelled pertuzumab and trastuzumab allow quantitative assessment of intra-tumoural HER2 expression, HER2 antibody saturation and the success of different drug delivery systems to be assessed. Molecular imaging with HER2 antibodies has the potential to be a non-invasive, predictive and prognostic technique capable of influencing therapeutic decisions, predicting response and failure of treatments as well as providing insights into receptor recycling and signalling. Similarly, conjugating HER2 antibodies with novel toxic payloads or combining HER2 antibodies with cellular immunotherapy provide exciting new opportunities for the management of tumours overexpressing HER2. Future research will lead to higher therapeutic responses, lower toxicities and providing insight into the mechanisms of resistance to HER2-targeted treatments.
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14
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Kikuchi M, Yamashita K, Waraya M, Minatani N, Ushiku H, Kojo K, Ema A, Kosaka Y, Katoh H, Sengoku N, Enomoto T, Tanino H, Sawanobori M, Watanabe M. Epigenetic regulation of ZEB1-RAB25/ESRP1 axis plays a critical role in phenylbutyrate treatment-resistant breast cancer. Oncotarget 2016; 7:1741-53. [PMID: 26646320 PMCID: PMC4811494 DOI: 10.18632/oncotarget.6480] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 11/15/2015] [Indexed: 01/14/2023] Open
Abstract
Phenylbutyrate (PB) is a histone deacetylase antagonist that also exhibits antitumor activity. In this study, we used 7 breast cancer cell lines to identify biomarker candidates that predict PB sensitivity in breast cancer. Comprehensive gene expression profiles were compared using microarrays, and the importance of the identified genes to PB sensitivity was confirmed in gene transfection experiments. CRL and MDAMB453 cells were identified as PB-sensitive, while MDAMB231 cells were PB-resistant.RAB25 and ESRP1 were identified as key regulators of PB sensitivity, while ANKD1, ETS1, PTRF, IFI16 and KIAA1199 acted as PB resistance-related genes. Expression of these genes was dramatically altered by DNA demethylation treatments. RAB25 expression inhibited IFI16 and PTRF, while ESRP1 expression suppressed ANKRD1, ETS1, and KIAA1199. Both RAB25 and ESRP1 were suppressed by ZEB1, which was in turn regulated via epigenetic mechanisms. Thus, PB sensitivity is influenced by epigenetic expression alteration of ZEB1. The genes associated with PB sensitivity are downstream targets of ZEB1. Epigenetic regulation of ZEB1 may prove valuable as a critical biomarker for predicting resistance to breast cancer therapies.
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Affiliation(s)
- Mariko Kikuchi
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Keishi Yamashita
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan.,Epigenetic Treatment Research Group, Japan
| | - Mina Waraya
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Naoko Minatani
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Hideki Ushiku
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Ken Kojo
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Akira Ema
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Yoshimasa Kosaka
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Hiroshi Katoh
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Norihiko Sengoku
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Takumo Enomoto
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | - Hirokazu Tanino
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
| | | | - Masahiko Watanabe
- Department of Surgery, Kitasato University School of Medicine, Kanagawa, Japan
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15
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Sadri-Ardalani F, Shabani M, Amiri MM, Bahadori M, Emami S, Sarrafzadeh AR, Noutash-Haghighat F, Jeddi-Tehrani M, Shokri F. Antibody response to HER2 extracellular domain and subdomains in mouse following DNA immunization. Tumour Biol 2015; 37:1217-27. [PMID: 26282003 DOI: 10.1007/s13277-015-3897-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 08/05/2015] [Indexed: 11/27/2022] Open
Abstract
Human epidermal growth factor receptor 2 (HER2) is overexpressed in 15-20 % of breast cancer patients and is an appropriate target for immunotherapy in these patients. Monoclonal antibodies (mAbs) specific to HER2 are currently applied to treat breast cancer patients with HER2 overexpression. Active immunization with HER2 DNA or protein has been considered as a suitable alternative. The aim of this study is to evaluate anti-HER2 antibody response in serum of mice immunized with DNA constructs containing full extracellular domain (fECD) or subdomains of human HER2. Four extracellular subdomains and also fECD of HER2 were cloned into pCMV6-Neo vector. Different groups of Balb/C mice were immunized with HER2 DNA constructs and boosted with HER2 recombinant protein. The anti-HER2 antibody was subsequently determined by ELISA, flow cytometry, and immunohistochemistry. Anti-HER2 antibody was detected only in serum of mice immunized with fECD DNA. None of HER2 extracellular subdomains induced appreciable levels of anti-HER2 antibody. However, boosting with fECD or extracellular subdomain III (DIII) recombinant protein resulted in enhanced anti-HER2 fECD as well as anti-HER2 subdomain antibody responses. In this regard, almost all (99 %) of HER2-overexpressing BT474 cells could be detected by serum antibody from mice immunized with HER2 subdomain DNA and boosted with recombinant HER2 protein by flow cytometry. Similarly, serum of mice immunized with DIII DNA construct and boosted with recombinant DIII protein could also recognize these cells, but to a lesser extent (50 %). Our findings suggest that combination of HER2 DNA and protein immunization could effectively induce anti-HER2 antibody response in Balb/C mice.
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Affiliation(s)
- Fateme Sadri-Ardalani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Shabani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
| | - Mohammad Mehdi Amiri
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Motahareh Bahadori
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Shaghayegh Emami
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | | | | | - Mahmood Jeddi-Tehrani
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Fazel Shokri
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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