Analysis of mechanism of antiphospholipid antibody-induced central nervous system impairment
Project/Area Number |
20H03718
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 54020:Connective tissue disease and allergy-related
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Research Institution | Hokkaido University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
藤枝 雄一郎 北海道大学, 大学病院, 助教 (70790872)
奥 健志 北海道大学, 大学病院, 講師 (70544295)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2022: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2021: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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Keywords | 精神神経SLE / 抗リン脂質抗体(aPL) / 全身性エリテマトーデス / 認知機能障害 |
Outline of Research at the Start |
APSは代表的自己免疫疾患であるSLEの類縁疾患で、半数はSLEに合併する。即ち、APSの疾患スペクトラムはSLEに極めて近い。SLEに合併しないAPS(原発性APS)でも、脳梗塞、癲癇、舞踏病、横断性脊髄症、多発性硬化症様病態などの特長ある神経疾患がよくみられることが知られており、aPL関連神経疾患とよばれることもある。申請者は、SLEの多様な中枢神経症状の主要な病態の一つがこのaPL関連神経疾患に属すると考えている。aPLが神経系細胞にもたらす変化を探求、その責任分子や細胞を明らかにする。若年者に重篤な後遺症をもたらしうるAPS/SLEにおける中枢神経障害の予防と治療に貢献できると考える。
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Outline of Final Research Achievements |
WBCAL-1, immunoglobulin G (IgG) isotype of mouse monoclonal anti-β2 glycoprotein I (GPI) antiphospholipid antibody was cerebroventricularly infused with the osmotic pump and was deposited in hippocampal CA 2-3 region. Although neuronal death was not observed using TUNEL staining, CD68-positive activated microglia were abundant around the CA 2-3 region. Bulk-RNA sequencing of the hippocampus revealed no difference of genes expressions between the WBCAL-1- and control IgG-infused groups, and specific expression of β2GPI in the CA2-3 region was not found using β2GPI-knock out mice. Further investigation will be needed to confirm the WBCAL-1 binding factor except β2GPI in the hippocampus, the pathogenesis of microglial activation and the effects on neuropsychiatric phenotype.
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Academic Significance and Societal Importance of the Research Achievements |
神経症状は数ある膠原病の病変のなかでも重要で、免疫抑制療法は進歩しているが、中枢神経症状を発症し寛解導入できなかった患者は社会的制限を強いられる。本研究は、抗リン脂質抗体が中枢神経へどのように影響を与えるかを評価した。特に抗リン脂質抗体は海馬CA2-3領域の神経細胞に沈着し、機能へ直接影響を与える可能性、その結合にβ2GPIを介さない可能性、また同領域のミクログリア活性化が明らかとなった。局所的な神経機能変化や炎症が、若年者に重篤な後遺症をもたらしうる抗リン脂質抗体を介した神経病変に関わる可能性を示し、今後の研究、病態予防や治療の原石となるという点で社会的意義がある。
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Report
(4 results)
Research Products
(14 results)
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[Journal Article] IKBKE contributes to neuropsychiatric manifestations in lupus-prone mice through microglial activation.2023
Author(s)
Karino K, Kono M, Takeyama S, Kudo Y, Kanda M, Abe N, Aso K, Fujieda Y, Kato M, Oku K, Amengual O, Atsumi T
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Journal Title
Arthritis Rheumatol.
Volume: 75(3)
Issue: 3
Pages: 411-423
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Improvement of long COVID-associated brain fog after COVID-19 vaccination in a patient with antiphospholipid antibodies.2022
Author(s)
Sakiyama K, Fujieda Y, Tada M, Tsuchida N, Nishino K, Moriya H, Yasuda M, Kono M, Kato M, Amengual O, Atsumi T.
Organizer
ICAPA2022
Related Report
Int'l Joint Research
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[Presentation] Chronic stress-induced microglial interleukin-12/23 axis and medial prefrontal cortex impairment in neuropsychiatric lupus.2021
Author(s)
Abe N, Fujieda Y, Oku K, Takahashi N, Karino K, Uchida M, Kono M, Tanaka Y, Hasebe R, Kato M, Atsumi T, Murakami M.
Organizer
第50回 日本免疫学会 学術集会
Related Report
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[Presentation] The effect of antiphospholipid antibody on cognitive function and microglial activation in mice.2020
Author(s)
Abe N, Oku K, Kudo Y, Karino K, Kono M, Fujieda Y, Amengual O, Kato M, Kamimura D, Yasuda S, Murakami M, Atsumi T.
Organizer
第64回日本リウマチ学会総会・学術集会(WEB)
Related Report
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[Presentation] Pathogenic Effect of Chronic Stress-induced interleukin-12/23p40 on Neuropsychiatric System in Lupus-prone Mouse.2020
Author(s)
Abe N, Oku K, Fujieda Y, Takahashi N, Karino K, Kono M, Kato M, Tanaka Y, Hasebe R, Amengual O, Yamasaki M, Watanabe M, Murakami M, Atsumi T.
Organizer
The American College of Rheumatology Convergence 2020 Annual Meeting, virtual congress
Related Report
Int'l Joint Research
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