HUANG M Q,ZHONG H,QIU Y,et al.Functionally impaired CD103+CD39+CD8+ T cell subsets with immune-suppressive properties infiltrating gastric cancer tissues promote tumor progression[J].J Army Med Univ,2026,48(04):445-452.DOI:10.16016/j.2097-0927.202512028.
HUANG M Q,ZHONG H,QIU Y,et al.Functionally impaired CD103+CD39+CD8+ T cell subsets with immune-suppressive properties infiltrating gastric cancer tissues promote tumor progression[J].J Army Med Univ,2026,48(04):445-452.DOI:10.16016/j.2097-0927.202512028.DOI:
Functionally impaired CD103+CD39+CD8+ T cell subsets with immune-suppressive properties infiltrating gastric cancer tissues promote tumor progression
T cell subsets in gastric cancer tissues and analyze their response characteristics
clarifying the clinical relevance of this subset.
Methods
2
Surgical specimens (tumor tissues
adjacent tissues
and peripheral blood) were collected from gastric cancer patients at the Department of General Surgery
Second Affiliated Hospital of Army Medical University between January 2023 and May 2024. Flow cytometry and immunofluorescence staining quantified the proportion and number of CD103
+
CD39
+
CD8
+
T cells in tumor ve
rsus adjacent tissues. Flow cytometry further analyzed CD69
PD-1
and IFN-γ expression in this subset. Peripheral blood mononuclear cells (PBMCs) were isolated and cultured
in vitro
to assess TGF-β1-induced differentiation. Correlation with disease stage was analyzed by detecting the infrltration level of CD103
+
CD39
+
CE8
+
T Cell subsets
via
flow cytometry.
Results
2
Compared with adjacent tissues
gastric cancer tissues showed significantly increased proportions of CD103
+
CD39
+
CD8
+
T cells (
P
<
0.05); immunofluorescence confirmed higher numbers in tumor tissues. Relative to CD103
+
CD39
-
and CD103
-
CD39
-
CD8
+
T subsets
CD103
+
CD39
+
CD8
+
T cells exhibited elevated CD69 and PD-1 expression (
P
<
0.05) but reduced IFN-γ (
P
<
0.05).
In vitro
TGF-β1 stimulation upregulated co-expression of CD103 and CD39 in CD8
+
T cells (
P
<
0.05). Moreover
advanced gastric cancer patients had higher tumor infiltration of this subset than early-stage patients (
P
<
0.05).
Conclusion
2
CD103
+
CD39
+
CD8
+
T cell subsets display increased infiltration and functionally impaired responses in gastric cancer
facilitating tumor immune escape.
关键词
Keywords
references
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