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2022 Fiscal Year Final Research Report

Pathology of Epstein-Barr virus-associated lymphoproliferative disorders and their associations with microRNA abnormalities

Research Project

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Project/Area Number 20K07403
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49020:Human pathology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Shinozaki-Ushiku Aya (篠崎綾)  東京大学, 医学部附属病院, 准教授 (60581824)

Project Period (FY) 2020-04-01 – 2023-03-31
KeywordsEB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.

Free Research Field

病理学

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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Published: 2024-01-30  

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