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2017 ; 6
(9
): e1338230
Nephropedia Template TP
gab.com Text
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English Wikipedia
CD103+ tumor-infiltrating lymphocytes are tumor-reactive intraepithelial CD8+ T
cells associated with prognostic benefit and therapy response in cervical cancer
#MMPMID28932636
Komdeur FL
; Prins TM
; van de Wall S
; Plat A
; Wisman GBA
; Hollema H
; Daemen T
; Church DN
; de Bruyn M
; Nijman HW
Oncoimmunology
2017[]; 6
(9
): e1338230
PMID28932636
show ga
Human papilloma virus (HPV)-induced cervical cancer constitutively expresses
viral E6/E7 oncoproteins and is an excellent target for T cell-based
immunotherapy. However, not all tumor-infiltrating T cells confer equal benefit
to patients, with epithelial T cells being superior to stromal T cells. To assess
whether the epithelial T cell biomarker CD103 could specifically discriminate the
beneficial antitumor T cells, association of CD103 with clinicopathological
variables and outcome was analyzed in the TCGA cervical cancer data set (n = 304)
and by immunohistochemistry (IHC) in an independent cohort (n = 460).
Localization of CD103+ cells in the tumor was assessed by immunofluorescence.
Furthermore, use of CD103 as a response biomarker was assessed in an in vivo
E6/E7+ tumor model. Our results show that CD103 gene expression was strongly
correlated with cytotoxic T cell markers (e.g. CD8/GZMB/PD1) in the TCGA series.
In line with this, CD103+ cells in the IHC series co-expressed CD8 and were
preferentially located in cervical tumor epithelium. High CD103+ cell
infiltration was strongly associated with an improved prognosis in both series,
and appeared to be a better predictor of outcome than CD8. Interestingly, the
prognostic benefit of CD103 in both series seemed limited to patients receiving
radiotherapy. In a preclinical mouse model, HPV E6/E7-targeted therapeutic
vaccination in combination with radiotherapy increased the intratumoral number of
CD103+ CD8+ T cells, providing a potential mechanistic basis for our results. In
conclusion, CD103 is a promising marker for rapid assessment of tumor-reactive T
cell infiltration of cervical cancers and a promising response biomarker for
E6/E7-targeted immunotherapy.