2017 Fiscal Year Final Research Report
ICOS+ Foxp3+ TILs in gastric cancer are prognostic markers and effector regulatory T cells
| Project/Area Number |
16K19892
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
General surgery
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| Research Institution | Osaka University |
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Principal Investigator |
KATO Ryo 大阪大学, 医学部附属病院, 医員 (80745422)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | 胃癌 / ICOS / 活性化Treg / ピロリ菌 / pDC |
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| Outline of Final Research Achievements |
Tissue-infiltrating mononuclear cells extracted from fresh gastric cancer tissues were analyzed by flow cytometry. ICOS+ Foxp3+ CD4T cell(ICOS+ Treg) TILs was higher in the late stages, and patients with higher ICOS+ Treg showed shorter relapse-free survival in gastric cancer. Moreover, ICOS+ Treg had highly immunosuppressive function. In multicolor immunohistochemistry and flow cytometry, the expression of ICOS in Treg was closely related to Helicobacter pylori infection and plasmacytoid dendritic cells (pDCs).
Our results indicated the potential of ICOS+ Treg as prognostic markers and that of direct and indirect immunotherapy targeting for ICOS, pDC or Helicobacter pylori.
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| Free Research Field |
Treg
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