Autoantibodies in patients with autoimmune pancreatitis: its pathophysiological roles and clinical significance
| Project/Area Number |
18K07958
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 53010:Gastroenterology-related
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| Research Institution | 株式会社関西メディカルネット(関西電力医学研究所) |
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Principal Investigator |
Chiba Tsutomu 株式会社関西メディカルネット(関西電力医学研究所), 関西電力医学研究所, 学術顧問 (30188487)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 自己免疫性膵炎 / 抗ラミニン511抗体 / 自己抗体 / IgG4関連疾患 / ラミニン抗体 / IgG4硬化性胆管炎 / ラミニン511-E8抗体 / ラミニン511抗体 / IgG4 |
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| Outline of Final Research Achievements |
We examined significance of anti-laminin 511 antibody in patients with autoimmune pancreatitis (AIP). In AIP patients with anti-laminin antibody, pancreas damage was more broad as compared to those without the antibody, and association of cancer and allergy was less prominent than in those without the antibody. A number of AIP patients without anti-laminin antibody had anti-integrin α6β1 antibody, and these were frequently associated with cancer or allergy. Nearly half of AIP patients had IgG4-related cholangitis, a half of which were positive for anti-laminin antibody. Some patients with type II AIP had anti-laminin antibody, and these patients were considered type I AIP. In contrast, some AIP patients with positive for neither antibody had UC. These patients were considered type II AIP.
Administration of IgG from AIP patients induced not only pancreatic but also biliary lesion in neonatal mice, but no pathology was found in lacrimal gland, salivary gland and in the kidney.
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| Academic Significance and Societal Importance of the Research Achievements |
抗ラミニン511抗体を測定することによって、AIPの診断のみならず、原発性硬化性胆管炎とIgG4関連胆管炎を鑑別が可能となる。またI型、II型AIPの鑑別も容易になり、治療法の選択に役立つと思われた。一方、患者の抗体投与により病変が形成されることは、AIPの発症に自己抗体が関与することを示しており、このことは、今後の治療法開発に役立つと期待される。
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Report
(4 results)
Research Products
(6 results)
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[Journal Article] Phenotyping of IgG4-related diseases based on affected organ pattern: A multicenter cohort study using cluster analysis.2020
Author(s)
Niwamoto T, Handa T, Matsui S, Yamamoto H, Yoshifuji H, Abe H, MatsumotoH, Kodama Y, Chiba T, Seno H, Mimori T, Hirai T.
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Journal Title
Modern Rheumatology
Volume: in press
Issue: 1
Pages: 235-240
DOI
Related Report
Peer Reviewed
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