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Halse H, Colebatch AJ, Petrone P, Henderson MA, Mills JK, Snow H, Westwood JA, Sandhu S, Raleigh JM, Behren A, Cebon J, Darcy PK, Kershaw MH, McArthur GA, Gyorki DE, Neeson PJ. Multiplex immunohistochemistry accurately defines the immune context of metastatic melanoma. Sci Rep 2018; 8:11158. [PMID: 30042403 PMCID: PMC6057961 DOI: 10.1038/s41598-018-28944-3] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 07/02/2018] [Indexed: 01/01/2023] Open
Abstract
A prospective study explored the heterogeneous nature of metastatic melanoma using Multiplex immunohistochemistry (IHC) and flow cytometry (FACS). Multiplex IHC data quantitated immune subset number present intra-tumoral (IT) vs the tumor stroma, plus distance of immune subsets from the tumor margin (TM). In addition, mIHC showed a close association between the presence of IT CD8+ T cells and PDL1 expression in melanoma, which was more prevalent on macrophages than on melanoma cells. In contrast, FACS provided more detailed information regarding the T cell subset differentiation, their activation status and expression of immune checkpoint molecules. Interestingly, mIHC detected significantly higher Treg numbers than FACS and showed preferential CD4+ T cell distribution in the tumor stroma. Based on the mIHC and FACS data, we provide a model which defines metastatic melanoma immune context into four categories using the presence or absence of PDL1+ melanoma cells and/or macrophages, and their location within the tumor or on the periphery, combined with the presence or absence of IT CD8+ T cells. This model interprets melanoma immune context as a spectrum of tumor escape from immune control, and provides a snapshot upon which interpretation of checkpoint blockade inhibitor (CBI) therapy responses can be built.
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Affiliation(s)
- H Halse
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - A J Colebatch
- Division of Cancer Medicine Melanoma Program, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - P Petrone
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - M A Henderson
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - J K Mills
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia.,Division of Cancer Surgery, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - H Snow
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - J A Westwood
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - S Sandhu
- Division of Cancer Medicine Melanoma Program, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3052, Australia
| | - J M Raleigh
- Division of Cancer Medicine Melanoma Program, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - A Behren
- Olivia Newton John Cancer Research Institute, Heidelberg, Victoria, 3084, Australia.,School of Cancer Medicine, La Trobe University, Bundoora, 3086, Australia
| | - J Cebon
- Olivia Newton John Cancer Research Institute, Heidelberg, Victoria, 3084, Australia.,School of Cancer Medicine, La Trobe University, Bundoora, 3086, Australia
| | - P K Darcy
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3052, Australia
| | - M H Kershaw
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3052, Australia
| | - G A McArthur
- Division of Cancer Medicine Melanoma Program, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia
| | - D E Gyorki
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia.,Division of Cancer Surgery, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia.,Department of Surgery, University of Melbourne, Parkville, Victoria, 3052, Australia
| | - P J Neeson
- Cancer Immunology Research, Peter MacCallum Cancer Centre, 305 Grattan Street, Melbourne, 3000, Australia. .,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, 3052, Australia.
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