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Classical Hodgkin Lymphoma with Reduced β2M/MHC Class I Expression Is Associated with Inferior Outcome Independent of 9p24.1 Status

Lookup NU author(s): Dr Christopher Carey

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Abstract

In classical Hodgkin lymphoma (cHL), malignant Hodgkin Reed-Sternberg (HRS) cells evade antitumor immunity by multiple mechanisms, including perturbed antigen presentation and enhanced PD-1 signaling. HRS cell expression of the PD-1 ligands is attributable, in part, to copy number alterations of 9p24.1/CD274(PD-L1)/PDCD1LG2(PD-L2) Amplification of PD-L1/PD-L2 is associated with advanced clinical stage and inferior progression-free survival (PFS) following first-line (induction) therapy. The relationships between altered expression of β₂-microglobulin (β₂M), MHC class I, and MHC class II by HRS cells, PD-L1/PD-L2 amplification, and clinical outcome in cHL are poorly defined. We assessed these variables in diagnostic biopsy specimens from 108 patients with cHL who received uniform treatment and had long-term follow-up and found decreased/absent expression of β₂M/MHC class I in 79% (85/108) and decreased/absent expression of MHC class II in 67% (72/108) of cases. Patients with decreased/absent β₂M/MHC class I had shorter PFS, independent of PD-L1/PD-L2 amplification and advanced stage. Decreased or absent MHC class II was unrelated to outcome. These results suggest that MHC class I-mediated antigen presentation by HRS cells is an important component of the biological response to standard chemo/radiotherapy. The paucity of β₂M/MHC class I expression on HRS cells also prompts speculation regarding alternative mechanisms of action of PD-1 blockade in cHL. Cancer Immunol Res; 4(11); 910-6. ©2016 AACR.

Publication metadata

Author(s): Roemer MG, Advani RH, Redd RA, Pinkus GS, Natkunam Y, Ligon AH, Connelly CF, Pak CJ, Carey CD, Daadi SE, Chapuy B, deJong D, Hoppe RT, Neuberg DS, Shipp MA, Rodig SJ

Publication type: Article

Publication status: Published

Journal: Cancer Immunology Research

Year: 2017

Volume: 4

Issue: 11

Pages: 910-916

Print publication date: 04/11/2016

Online publication date: 13/10/2016

Acceptance date: 01/09/2016

ISSN (print): 2326-6066

ISSN (electronic): 2326-6074

Publisher: American Association for Cancer Research

URL: https://doi.org/10.1158/2326-6066.CIR-16-0201

DOI: 10.1158/2326-6066.CIR-16-0201

PubMed id: 27737878

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