2020 Fiscal Year Final Research Report
Elucidation of the contribution of Epstein-Barr virus reactivation to refractory ulcerative colitis
Project/Area Number |
19K17430
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 53010:Gastroenterology-related
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Research Institution | Kyoto University |
Principal Investigator |
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Project Period (FY) |
2019-04-01 – 2021-03-31
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Keywords | 炎症性腸疾患 / 潰瘍性大腸炎 / Epstein-Barr virus |
Outline of Final Research Achievements |
We focused on the reactivation of Epstein-Barr virus (EBV), which is same herpesvirus family as cytomegalovirus, already known as an exacerbating factor of ulcerative colitis (UC). EBV reactivation was detected in colonic inflamed mucosa of 50% of UC patients. EBV reactivation rate was correlated with UC disease activity and endoscopic severity, considered to be an UC exacerbation factor. Treatment with Anti-TNF-α antibody or calcineurin inhibitor was a risk factor for EBV reactivation, suggesting that TNF-α may suppress EBV lytic infection in refractory UC.
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Free Research Field |
炎症性腸疾患
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Academic Significance and Societal Importance of the Research Achievements |
潰瘍性大腸炎(UC)患者数は増加の一途を辿り、20万人を越えている。患者数の増加に伴い、内科的治療に抵抗性を示す難治例も増加している。難治化は複合的な要因によると考えられているが、詳細は明らかになっていない。近年抗TNF-α抗体製剤をはじめ、免疫抑制治療の研究・開発が進み、高い有効性が示されているが、難治例の原因の一つとしてこれら治療に起因するEBV再活性化の関与が示唆された。今後、再活性化の抑制や抗ウイルス治療といった新たな治療戦略に繋がる可能性も示唆された。
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