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Published in: Immunologic Research 6/2019

01-12-2019 | Breast Cancer | Original Article

Retained or altered expression of major histocompatibility complex class I in patient-derived xenograft models in breast cancer

Authors: In Hye Song, Young-Ae Kim, Hyeonjin Lee, Hye Seon Park, In Ah Park, Chan Kyu Sim, Myeong Sup Lee, Gyungyub Gong, Hee Jin Lee

Published in: Immunologic Research | Issue 6/2019

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Abstract

The expression of major histocompatibility complex class I (MHC I) in tumor cells is regulated by interferon signaling, and it is an important factor in the efficacy of cytotoxic T cell–dependent immunotherapy. To determine the impact of immune cells in MHC I expression on tumor cells, we compared the expression of MHC I in tumor cells derived from primary breast cancers and patient-derived xenograft (PDX) models. MHC I and myxovirus resistance gene A (MxA) expression were analyzed using immunohistochemistry in 23 cases of tumor tissue and corresponding primary and secondary PDXs. The median H score of MHC I was 210 (0–300) in patient tumor tissues, 197.5 (0–300) in primary PDX tumors, and 157.5 (5–300) in secondary PDX tumors. Cases were divided into four groups based on the difference in MHC I expression between the patient tumor tissues and secondary PDXs. Eleven cases constituted the high MHC I group, four constituted the low MHC I group, six comprised the decreased MHC I group, and two comprised the increased MHC I group. MHC I and MxA expressions in each tumor were weakly correlated within patients’ tumors, while strongly correlated within PDX models. Retained or altered expression of MHC I in breast cancer PDXs reveals the presence of intrinsic and extrinsic interferon signaling pathways in tumor cells. Thus, considering MHC I expression in PDX is important when using PDX models to evaluate the efficacy of cancer immunotherapy in a preclinical setting.
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Metadata
Title
Retained or altered expression of major histocompatibility complex class I in patient-derived xenograft models in breast cancer
Authors
In Hye Song
Young-Ae Kim
Hyeonjin Lee
Hye Seon Park
In Ah Park
Chan Kyu Sim
Myeong Sup Lee
Gyungyub Gong
Hee Jin Lee
Publication date
01-12-2019
Publisher
Springer US
Published in
Immunologic Research / Issue 6/2019
Print ISSN: 0257-277X
Electronic ISSN: 1559-0755
DOI
https://doi.org/10.1007/s12026-019-09109-4

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