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Smith HG, Mansfield D, Roulstone V, Kyula-Currie JN, McLaughlin M, Patel RR, Bergerhoff KF, Paget JT, Dillon MT, Khan A, Melcher A, Thway K, Harrington KJ, Hayes AJ. PD-1 Blockade Following Isolated Limb Perfusion with Vaccinia Virus Prevents Local and Distant Relapse of Soft-tissue Sarcoma. Clin Cancer Res 2019; 25:3443-3454. [PMID: 30885937 DOI: 10.1158/1078-0432.ccr-18-3767] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/16/2019] [Accepted: 03/08/2019] [Indexed: 11/16/2022]
Abstract
PURPOSE The prevention and treatment of metastatic sarcoma are areas of significant unmet need. Immune checkpoint inhibitor monotherapy has shown little activity in sarcoma and there is great interest in identifying novel treatment combinations that may augment responses. In vitro and in vivo, we investigated the potential for an oncolytic vaccinia virus (GLV-1h68) delivered using isolated limb perfusion (ILP) to promote antitumor immune responses and augment response to PD-1 blockade in sarcoma.Experimental Design: In an established animal model of extremity sarcoma, we evaluated the potential of locoregional delivery of a vaccinia virus (GLV-1h68) alongside biochemotherapy (melphalan/TNFα) in ILP. Complementary in vitro assays for markers of immunogenic cell death were performed in sarcoma cell lines. RESULTS PD-1 monotherapy had minimal efficacy in vivo, mimicking the clinical scenario. Pretreatment with GLV-1h68 delivered by ILP (viral ILP) significantly improved responses. Furthermore, when performed prior to surgery and radiotherapy, viral ILP and PD-1 blockade prevented both local and distant relapse, curing a previously treatment-refractory model. Enhanced therapy was associated with marked modulation of the tumor microenvironment, with an increase in the number and penetrance of intratumoral CD8+ T cells and expansion and activation of dendritic cells. GLV-1h68 was capable of inducing markers of immunogenic cell death in human sarcoma cell lines. CONCLUSIONS Viral ILP augments the response to PD-1 blockade, transforming this locoregional therapy into a potentially effective systemic treatment for sarcoma and warrants translational evaluation.
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Affiliation(s)
- Henry G Smith
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
- The Sarcoma Unit, Department of Academic Surgery, The Royal Marsden Hospital NHS Foundation Trust, London, United Kingdom
| | - David Mansfield
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Victoria Roulstone
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Joan N Kyula-Currie
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Martin McLaughlin
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Radhika R Patel
- Flow Cytometry and Light Microscopy Facility, The Institute of Cancer Research, London, United Kingdom
| | | | - James T Paget
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Magnus T Dillon
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Aadil Khan
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Alan Melcher
- Translational Immunotherapy Team, The Institute of Cancer Research, London, United Kingdom
| | - Khin Thway
- The Sarcoma Unit, Department of Academic Surgery, The Royal Marsden Hospital NHS Foundation Trust, London, United Kingdom
| | - Kevin J Harrington
- Targeted Therapy Team, The Institute of Cancer Research, London, United Kingdom.
| | - Andrew J Hayes
- The Sarcoma Unit, Department of Academic Surgery, The Royal Marsden Hospital NHS Foundation Trust, London, United Kingdom
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