Loss of tapasin correlates with diminished CD8(+) T-cell immunity and prognosis in colorectal cancer.

Sokol, Lena; Kölzer, Viktor; Rau, Tilman; Karamitopoulou, Evanthia; Zlobec, Inti; Lugli, Alessandro (2015). Loss of tapasin correlates with diminished CD8(+) T-cell immunity and prognosis in colorectal cancer. Journal of translational medicine, 13(279), p. 279. BioMed Central 10.1186/s12967-015-0647-1

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BACKGROUND Tapasin is a crucial component of the major histocompatibility (MHC) class I antigen presentation pathway. Defects in this pathway can lead to tumor immune evasion. The aim of this study was to test whether tapasin expression correlates with CD8(+) cytotoxic T lymphocyte (CTL) infiltration of colorectal cancer (CRC) and overall survival. METHODS A next-generation tissue microarray (ngTMA) of 198 CRC patients with full clinicopathological information was included in this study. TMA slides were immunostained for tapasin, MHC I and CD8. Marker expression was analyzed with immune-cell infiltration, patient survival and TNM-staging. RESULTS A reduction of tapasin expression strongly correlated with venous invasion (AUC 0.682, OR 2.7, p = 0.002; 95% CI 1.7-5.0), lymphatic invasion (AUC 0.620, OR 2.0, p = 0.005; 95 % CI 1.3-3.3), distant metastasis (AUC 0.727, OR 2.9, p = 0.004; 95% CI 1.4-5.9) and an infiltrative tumor border configuration (AUC 0.621, OR 2.2, p = 0.017; 95% CI 1.2-4.4). Further, tapasin expression was associated with CD8(+) CTL infiltration (AUC 0.729, OR 5.4, p < 0.001; 95% CI 2.6-11), and favorable overall survival (p = 0.004, HR 0.6, 95% CI 0.42-0.85). CONCLUSIONS Consistent with published functional data showing that tapasin promotes antigen presentation, as well as tumor immune recognition and destruction by CD8(+) CTLs, a reduction in tapasin expression is associated with tumor progression in CRC.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Pathology > Clinical Pathology
04 Faculty of Medicine > Service Sector > Institute of Pathology

UniBE Contributor:

Sokol, Lena; Kölzer, Viktor; Rau, Tilman; Karamitopoulou, Evanthia; Zlobec, Inti and Lugli, Alessandro

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

1479-5876

Publisher:

BioMed Central

Language:

English

Submitter:

Doris Haefelin

Date Deposited:

30 Oct 2015 14:28

Last Modified:

26 Jun 2016 02:07

Publisher DOI:

10.1186/s12967-015-0647-1

PubMed ID:

26310568

BORIS DOI:

10.7892/boris.72361

URI:

https://boris.unibe.ch/id/eprint/72361

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