2022 Fiscal Year Final Research Report
Pathology of Epstein-Barr virus-associated lymphoproliferative disorders and their associations with microRNA abnormalities
Project/Area Number |
20K07403
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 49020:Human pathology-related
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Research Institution | The University of Tokyo |
Principal Investigator |
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | EBウイルス / 悪性リンパ腫 / リンパ増殖性疾患 / microRNA / PD-L1 |
Outline of Final Research Achievements |
To clarify the pathology of Epstein-Barr virus-associated lymphoproliferative disorders (LPD), clinicopathological analysis including several biological markers was performed. There were no significant differences in the profiles of intratumoral immune cells between histological subtypes, while high EBV-microRNA expression was associated with LPD and cases showing latecy type III. In silico analysis demonstrated that some of these microRNAs might target cancer-related genes. The study also demonstrated that PD-L1 expression in EBV-positive tumor cells had close associations with tumor cell morpholgy and LMP-1 eexression.
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Free Research Field |
病理学
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Academic Significance and Societal Importance of the Research Achievements |
本研究により、EBウイルス関連LPDにおけるEBウイルス由来microRNAの意義の一端を示すことができた。さらにEBウイルス陽性腫瘍細胞が抗腫瘍免疫を回避する手段として発現しているPD-L1が、細胞形態や潜伏感染遺伝子の一つであるLMP-1の発現と相関していることが明らかになった。これらの分子の発現と細胞形態との相関について、これまで詳細に検討した報告は乏しく、EBウイルス関連LPDの病態の理解に寄与するとともに、治療標的としての可能性を示唆するものとなる。
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