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Chia PL, Parakh S, Tsao MS, Pham NA, Gan HK, Cao D, Burvenich IJG, Rigopoulos A, Reilly EB, John T, Scott AM. Targeting and Efficacy of Novel mAb806-Antibody-Drug Conjugates in Malignant Mesothelioma. Pharmaceuticals (Basel) 2020; 13:E289. [PMID: 33023139 PMCID: PMC7601847 DOI: 10.3390/ph13100289] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 09/26/2020] [Accepted: 09/28/2020] [Indexed: 11/30/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) is highly overexpressed in malignant mesothelioma (MM). MAb806 is a novel anti-EGFR antibody that selectively targets a tumor-selective epitope. MAb806-derived antibody drug conjugates (ADCs), ABT-414, ABBV-221 and ABBV-322, may represent a novel therapeutic strategy in MM. EGFR and mAb806 epitope expressions in mesothelioma cell lines were evaluated using an array of binding assays, and the in vitro cell effects of ABT-414 and ABBV-322 were determined. In vivo therapy studies were conducted in mesothelioma xenograft and patient-derived xenograft (PDX) tumor models. We also performed biodistribution and imaging studies to allow the quantitative targeting of MM by mAb806 using a 89Zr-labeled immunoconjugate-ch806. A high EGFR expression was present in all mesothelioma cell lines evaluated and mAb806 binding present in all cell lines, except NCIH-2452. ABT-414 and ABBV-322 resulted in significant tumor growth inhibition in MM models with high EGFR and mAb806 epitope expressions. In contrast, in an EGFR-expressing PDX model that was negative for the mAb806 epitope, no growth inhibition was observed. We demonstrated the specific targeting of the mAb806 epitope expressing MM tumors using 89Zr-based PET imaging. Our data suggest that targeting EGFR in MM using specific ADCs is a valid therapeutic strategy and supports further investigation of the mAb806 epitope expression as a predictive biomarker.
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Affiliation(s)
- Puey-Ling Chia
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
- Faculty of Medicine, University of Melbourne, Melbourne, Victoria 3010, Australia
- Department of Medical Oncology, Austin Health, Melbourne, Victoria 3084, Australia
| | - Sagun Parakh
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
- Department of Medical Oncology, Austin Health, Melbourne, Victoria 3084, Australia
- School of Cancer Medicine, La Trobe University, Plenty Rd &, Kingsbury Dr, Bundoora, Victoria 3086, Australia
| | - Ming-Sound Tsao
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 2C1, Canada; (M.-S.T.); (N.-A.P.)
| | - Nhu-An Pham
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 2C1, Canada; (M.-S.T.); (N.-A.P.)
| | - Hui K. Gan
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
- Faculty of Medicine, University of Melbourne, Melbourne, Victoria 3010, Australia
- Department of Medical Oncology, Austin Health, Melbourne, Victoria 3084, Australia
- School of Cancer Medicine, La Trobe University, Plenty Rd &, Kingsbury Dr, Bundoora, Victoria 3086, Australia
| | - Diana Cao
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
| | - Ingrid J. G. Burvenich
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
- Faculty of Medicine, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Angela Rigopoulos
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
| | | | - Thomas John
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
- Faculty of Medicine, University of Melbourne, Melbourne, Victoria 3010, Australia
- Department of Medical Oncology, Austin Health, Melbourne, Victoria 3084, Australia
- School of Cancer Medicine, La Trobe University, Plenty Rd &, Kingsbury Dr, Bundoora, Victoria 3086, Australia
| | - Andrew M. Scott
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria 3084, Australia; (P.-L.C.); (S.P.); (H.K.G.); (D.C.); (I.J.G.B.); (A.R.)
- Faculty of Medicine, University of Melbourne, Melbourne, Victoria 3010, Australia
- School of Cancer Medicine, La Trobe University, Plenty Rd &, Kingsbury Dr, Bundoora, Victoria 3086, Australia
- Department of Molecular Imaging and Therapy, Austin Health, Melbourne, Victoria 3084, Australia
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Extracellular Vesicles-Based Drug Delivery Systems: A New Challenge and the Exemplum of Malignant Pleural Mesothelioma. Int J Mol Sci 2020; 21:ijms21155432. [PMID: 32751556 PMCID: PMC7432055 DOI: 10.3390/ijms21155432] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/24/2020] [Accepted: 07/27/2020] [Indexed: 02/07/2023] Open
Abstract
Research for the most selective drug delivery to tumors represents a fascinating key target in science. Alongside the artificial delivery systems identified in the last decades (e.g., liposomes), a family of natural extracellular vesicles (EVs) has gained increasing focus for their potential use in delivering anticancer compounds. EVs are released by all cell types to mediate cell-to-cell communication both at the paracrine and the systemic levels, suggesting a role for them as an ideal nano-delivery system. Malignant pleural mesothelioma (MPM) stands out among currently untreatable tumors, also due to the difficulties in achieving an early diagnosis. Thus, early diagnosis and treatment of MPM are both unmet clinical needs. This review looks at indirect and direct evidence that EVs may represent both a new tool for allowing an early diagnosis of MPM and a potential new delivery system for more efficient therapeutic strategies. Since MPM is a relatively rare malignant tumor and preclinical MPM models developed to date are very few and not reliable, this review will report data obtained in other tumor types, suggesting the potential use of EVs in mesothelioma patients as well.
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