Expression of human leukocyte antigen class I and β2‐microglobulin in colorectal cancer and its prognostic impact

Downregulation of human leukocyte antigen (HLA) class I has been postulated to be a mechanism of adaptive immune escape in various tumors, especially microsatellite instability–high (MSI‐H) colorectal cancer (CRC). In this study, we aimed to investigate HLA class I and β2‐microglobulin (β2M) express...

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Veröffentlicht in:Cancer science 2021-01, Vol.112 (1), p.91-100
Hauptverfasser: Na, Hee Young, Park, Yujun, Nam, Soo Kyung, Lee, Kyu Sang, Oh, Heung‐Kwon, Kim, Duck‐Woo, Kang, Sung‐Bum, Kim, Woo Ho, Lee, Hye Seung
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container_end_page 100
container_issue 1
container_start_page 91
container_title Cancer science
container_volume 112
creator Na, Hee Young
Park, Yujun
Nam, Soo Kyung
Lee, Kyu Sang
Oh, Heung‐Kwon
Kim, Duck‐Woo
Kang, Sung‐Bum
Kim, Woo Ho
Lee, Hye Seung
description Downregulation of human leukocyte antigen (HLA) class I has been postulated to be a mechanism of adaptive immune escape in various tumors, especially microsatellite instability–high (MSI‐H) colorectal cancer (CRC). In this study, we aimed to investigate HLA class I and β2‐microglobulin (β2M) expression in MSI‐H and microsatellite‐stable (MSS) CRCs and determine its prognostic impact. The representative areas from the tumor center (TC) and tumor periphery (TP) from 300 CRCs, including 161 MSI‐H and 139 MSS cases, were selected to construct a tissue microarray. Immunohistochemistry (IHC) for HLA A/B/C, β2M, CD3, and CD8 was performed. Reduced HLA A/B/C expression was detected in 113 (70.2%) MSI‐H and 54 (38.8%) MSS cases, while reduced β2M expression was observed in 69 (42.9%) MSI‐H and 17 (12.2%) MSS cases. Although reduced β2M expression was associated with higher pathological tumor (pT) stage in MSI‐H CRC with borderline significance, no association was found between HLA A/B/C and β2M expression and survival. Interestingly, reduced HLA A/B/C expression in MSS was associated with higher stage, and reduced HLA A/B/C and β2M expression was an independent prognostic factor in multivariate analysis. In conclusion, reduced HLA A/B/C and β2M expression was frequently observed in immunotherapy‐naive MSI‐H CRC, suggesting the possibility of primary resistance to immune checkpoint inhibitor. Interestingly, downregulation of HLA A/B/C and β2M was associated with poor prognosis in MSS cancers. Overall, IHC for HLA A/B/C and β2M might be a feasible predictive or prognostic tool in CRC. Reduced HLA A/B/C and β2M expression is frequently observed in immunotherapy‐naive MSI‐H CRC, suggesting the possibility of primary resistance to immune checkpoint inhibitors. Interestingly, downregulation of HLA A/B/C and β2M was associated with poor survival in MSS cancers, but not in MSI‐H tumors, indicating that cell‐mediated antitumoral immune response may also play an important role in MSS CRC. Together, IHC for HLA A/B/C and β2M can be a predictive or prognostic tool in CRC.
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In this study, we aimed to investigate HLA class I and β2‐microglobulin (β2M) expression in MSI‐H and microsatellite‐stable (MSS) CRCs and determine its prognostic impact. The representative areas from the tumor center (TC) and tumor periphery (TP) from 300 CRCs, including 161 MSI‐H and 139 MSS cases, were selected to construct a tissue microarray. Immunohistochemistry (IHC) for HLA A/B/C, β2M, CD3, and CD8 was performed. Reduced HLA A/B/C expression was detected in 113 (70.2%) MSI‐H and 54 (38.8%) MSS cases, while reduced β2M expression was observed in 69 (42.9%) MSI‐H and 17 (12.2%) MSS cases. Although reduced β2M expression was associated with higher pathological tumor (pT) stage in MSI‐H CRC with borderline significance, no association was found between HLA A/B/C and β2M expression and survival. Interestingly, reduced HLA A/B/C expression in MSS was associated with higher stage, and reduced HLA A/B/C and β2M expression was an independent prognostic factor in multivariate analysis. In conclusion, reduced HLA A/B/C and β2M expression was frequently observed in immunotherapy‐naive MSI‐H CRC, suggesting the possibility of primary resistance to immune checkpoint inhibitor. Interestingly, downregulation of HLA A/B/C and β2M was associated with poor prognosis in MSS cancers. Overall, IHC for HLA A/B/C and β2M might be a feasible predictive or prognostic tool in CRC. Reduced HLA A/B/C and β2M expression is frequently observed in immunotherapy‐naive MSI‐H CRC, suggesting the possibility of primary resistance to immune checkpoint inhibitors. Interestingly, downregulation of HLA A/B/C and β2M was associated with poor survival in MSS cancers, but not in MSI‐H tumors, indicating that cell‐mediated antitumoral immune response may also play an important role in MSS CRC. 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Cancer Science published by John Wiley &amp; Sons Australia, Ltd on behalf of Japanese Cancer Association.</rights><rights>2021. This work is published under http://creativecommons.org/licenses/by-nc/4.0/ (the “License”). 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In this study, we aimed to investigate HLA class I and β2‐microglobulin (β2M) expression in MSI‐H and microsatellite‐stable (MSS) CRCs and determine its prognostic impact. The representative areas from the tumor center (TC) and tumor periphery (TP) from 300 CRCs, including 161 MSI‐H and 139 MSS cases, were selected to construct a tissue microarray. Immunohistochemistry (IHC) for HLA A/B/C, β2M, CD3, and CD8 was performed. Reduced HLA A/B/C expression was detected in 113 (70.2%) MSI‐H and 54 (38.8%) MSS cases, while reduced β2M expression was observed in 69 (42.9%) MSI‐H and 17 (12.2%) MSS cases. Although reduced β2M expression was associated with higher pathological tumor (pT) stage in MSI‐H CRC with borderline significance, no association was found between HLA A/B/C and β2M expression and survival. Interestingly, reduced HLA A/B/C expression in MSS was associated with higher stage, and reduced HLA A/B/C and β2M expression was an independent prognostic factor in multivariate analysis. In conclusion, reduced HLA A/B/C and β2M expression was frequently observed in immunotherapy‐naive MSI‐H CRC, suggesting the possibility of primary resistance to immune checkpoint inhibitor. Interestingly, downregulation of HLA A/B/C and β2M was associated with poor prognosis in MSS cancers. Overall, IHC for HLA A/B/C and β2M might be a feasible predictive or prognostic tool in CRC. Reduced HLA A/B/C and β2M expression is frequently observed in immunotherapy‐naive MSI‐H CRC, suggesting the possibility of primary resistance to immune checkpoint inhibitors. Interestingly, downregulation of HLA A/B/C and β2M was associated with poor survival in MSS cancers, but not in MSI‐H tumors, indicating that cell‐mediated antitumoral immune response may also play an important role in MSS CRC. Together, IHC for HLA A/B/C and β2M can be a predictive or prognostic tool in CRC.</abstract><cop>England</cop><pub>John Wiley &amp; Sons, Inc</pub><pmid>33159376</pmid><doi>10.1111/cas.14723</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-1667-7986</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adolescent
Adult
Aged
Aged, 80 and over
Antigens
Basic and Clinical Immunology
beta 2-Microglobulin - genetics
CD3 antigen
CD8 antigen
Chemotherapy
Colorectal cancer
Colorectal carcinoma
Colorectal Neoplasms - genetics
Colorectal Neoplasms - pathology
Down-Regulation - genetics
Female
Histocompatibility antigen HLA
Histocompatibility Antigens Class I - genetics
human leukocyte antigen class I
Humans
Immune checkpoint inhibitors
Immunohistochemistry
Immunohistochemistry - methods
Immunotherapy
Lung cancer
Lymphocytes
Male
Medical prognosis
Medical research
Microsatellite Instability
Microsatellite Repeats - genetics
Middle Aged
Multivariate analysis
Mutation
Original
Patients
Prognosis
Statistical analysis
Tumors
Young Adult
β2‐microglobulin
title Expression of human leukocyte antigen class I and β2‐microglobulin in colorectal cancer and its prognostic impact
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