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2017 ; 8
(ä): 138
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Expression of GARP Is Increased in Tumor-Infiltrating Regulatory T Cells and Is
Correlated to Clinicopathology of Lung Cancer Patients
#MMPMID28261204
Jin H
; Sun L
; Tang L
; Yu W
; Li H
Front Immunol
2017[]; 8
(ä): 138
PMID28261204
show ga
Regulatory T cells (Tregs) are immunosuppressive T cells that play an important
role in immune homeostasis. Multiple markers have been associated with the
characterization, as well as function of Tregs. Recently, glycoprotein A
repetitions predominant (GARP), a transmembrane protein containing leucine-rich
repeats, has been found to be highly expressed on the surface of activated Tregs.
GARP maintains Tregs' regulatory function and homeostasis through the activation
and secretion of transforming growth factor ?. In this study, we investigated the
expression of GARP in Tregs from the peripheral blood (PB) and tumor tissues of
lung cancer patients. The association between the proportion and expression level
of GARP on Tregs and the clinicopathological factors of lung cancer patients was
also analyzed. Results showed that in the tumor tissues of patients with lung
cancer, GARP expression was increased in Tregs and was associated with lymph node
metastasis, distant metastasis, and clinical stage. Furthermore, the infiltrating
Tregs from early stage patients exhibited higher GARP expression than that from
advanced cancer patients, which indicated that GARP might be an early prognostic
biomarker. In vitro coculture studies demonstrated that human lung cancer cell
lines might induce the expression of GARP in Tregs by certain mechanisms.
Overall, this research demonstrated the potential value of GARP in Tregs
definition and cancer immunotherapy.