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The elucidation of the PAI-1 expression through the natural immunity system in a lupus nephritis.

Research Project

Project/Area Number 19K17319
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionHirosaki University

Principal Investigator

Aizawa Tomomi  弘前大学, 医学部附属病院, 助教 (90836248)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsPAI-1 / 全身性エリテマトーデス / ループス腎炎 / 腎血管内皮細胞 / 抗マラリア薬 / PAI-1 / Toll様受容体
Outline of Research at the Start

Plasminogen activator inhibitor-1 (PAI-1)は、抗リン脂質抗体陽性の全身性エリテマトーデス (SLE)患者の血栓形成やループス腎炎 (LN)の進展に関わるという報告がある。申請者は、ヒト培養腎糸球体内皮細胞 (GECs)におけるToll様受容体3 (TLR3)を介するPAI-1産生について報告した。今回、GECsにおけるTLR3, TLR7, TLR9を介する PAI-1の発現とⅠ型IFNの関連性、既存の治療薬やSLE患者血清添加によるPAI-1発現の変化、SLE患者の尿, 血液検体中のPAI-1の濃度と疾患活動性との関連性について検討する。

Outline of Final Research Achievements

We examined the effect of the systemic lupus erythematosus (SLE) patient's serum on plasminogen activator inhibitor-1 (PAI-1) and tissue plasminogen activator (t-PA) expression in glomerular endothelial cells (GECs). We analyzed the expression of PAI-1 and tPA mRNA using reverse-transcriptase polymerase chain reaction. We also added the serum of nephrotic syndrome (NS) cases as a comparison. Expression of PAI-1 and tPA mRNA in GECs was intentionally observed by the group which added the serum of SLE but not by the serum of NS. We also examined correlation with a disease activity and PAI-1 or tPA mRNA expression in GECs. Expression of mRNA of PAI-1 and tPA correlates with a serum complement level and SLE disease activity index (SLEDAI).

Academic Significance and Societal Importance of the Research Achievements

ループス腎炎(LN)と凝固線溶系因子の関連性を解明するため、正常ヒト腎血管内皮細胞(GECs)におけるPAI-1、tPAの発現を調べている。我々はこれまでToll-like receptor (TLR3)を介してGECsからPAI-1が産生されることを確認し報告した。本研究では、全身性エリテマトーデス(SLE)患者血清をGECsへ直接添加し、よりLNの病態に近い培養系でのPAI-1発現を調べた。その結果、SLEの疾患活動性の指標である補体、SLEDAIとPAI-1のmRNA発現の相関が認められた。以上より、PAI-1がループス腎炎の進展に関与している可能性が示唆され、今後も解析を続けていく。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (1 results)

All 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] Inhibitory effect of anti-malarial agents on the expression of proinflammatory chemokines via Toll-like receptor 3 signaling in human glomerular endothelial cells2021

    • Author(s)
      Sato Riko、Imaizumi Tadaatsu、Aizawa Tomomi、Watanabe Shojiro、Tsugawa Koji、Kawaguchi Shogo、Seya Kazuhiko、Matsumiya Tomoh、Tanaka Hiroshi
    • Journal Title

      Renal Failure

      Volume: 43 Issue: 1 Pages: 643-650

    • DOI

      10.1080/0886022x.2021.1908901

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

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