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Study on epidemiological meta-analysis of diabetic nephropathy focusing on complex systems of periodontal disease and intestinal immune disturbance

Research Project

Project/Area Number 18H03015
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 57080:Social dentistry-related
Research InstitutionOkayama University

Principal Investigator

SAWA Yoshihiko  岡山大学, 医歯薬学総合研究科, 教授 (70271666)

Co-Investigator(Kenkyū-buntansha) 加藤 幸成  東北大学, 未来科学技術共同研究センター, 教授 (00571811)
坂上 竜資  福岡歯科大学, 口腔歯学部, 教授 (50215612)
丸濱 功太郎  岡山大学, 医歯薬学総合研究科, 助教 (60712792)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
Keywords糖尿病性腎症 / 歯周炎 / toll-like receptor / P. gingivalis / lipopolysaccharide / 白血球接着因子 / SGLT2 / ACE2 / 歯周疾患 / Porphyromonas gingivalis / アンジオテンシン変換酵素2 / リン再吸収抑制ホルモン / LPS / フレイル / TLR / 歯周病 / 腸管免疫撹乱 / 複雑系 / 疫学的メタ解析 / TLR阻害剤 / マウス実験 / ポドプラニン研究 / 予防医学
Outline of Final Research Achievements

It is known that diabetic patients with periodontitis are more likely to develop nephropathy than patients without periodontitis, and that diabetes is more likely to worsen, but the mechanism is unknown. This study showed that renal glomeruli in diabetic patients express TLRs that react with bacterial components and overreact to bacterial components. The intestinal bacteria that enter the blood are sterilized by the liver, but the bacteria that enter the blood from oral tissue due to periodontitis enter the kidneys directly. Glomeruli with complex structures cannot eliminate bacterial components and activate TLRs to release inflammatory factors. As a result, it was suggested that leukocyte adhesion factors and physialogical substances are overproduced in the kidney to promote nephropathy, and that SGLT2, which is responsible for sugar reabsorption, is abnormally expressed and diabetes is exacerbated.

Academic Significance and Societal Importance of the Research Achievements

糖尿病患者は、口腔衛生をしっかりと管理し、歯周病があれば早期に治療することで腎症に移行することを予防できる可能性を示すことができました。糖尿病性腎症の起こる仕組みは多様で、一概に口腔衛生のみと結びつけて言うことは出来ませんが、少しでも透析患者人口を減らすことに貢献できるのではないかと考えています。また、口腔衛生管理は糖尿病のコントロールに生物化学的に有効であることを社会に発信できると考えます。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (16 results)

All 2021 2020 2019 2018

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Immunohistochemical study for the expression of leukocyte adhesion molecules, and FGF23 and ACE2 in P. gingivalis LPS-induced diabetic nephropathy.2021

    • Author(s)
      Kajiwara K, Sawa Y, Fujita T, Tamaoki S.
    • Journal Title

      BMC Nephrology

      Volume: 22 Issue: 1 Pages: 3-3

    • DOI

      10.1186/s12882-020-02203-y

    • NAID

      120006955806

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of bisphosphonates on healing of tooth extraction wounds in infectious osteomyelitis of the jaw2021

    • Author(s)
      Yamashita J, Sawa N, Sawa Y, Miyazono S.
    • Journal Title

      Bone

      Volume: 143 Pages: 115611-115611

    • DOI

      10.1016/j.bone.2020.115611

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression of SARS-CoV-2 entry factors in human oral tissue2021

    • Author(s)
      Sawa Y, Ibaragi S, Okui T, Yamashita J, Ikebe T, Harada H.
    • Journal Title

      Journal of Anatomy

      Volume: ahead of print Issue: 6 Pages: 1341-1354

    • DOI

      10.1111/joa.13391

    • NAID

      120006995388

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cancellation of the Calcification in Cultured Osteoblasts by CLEC-22021

    • Author(s)
      Kanai Takenori、Sawa Yoshihiko、Sato Yoshiaki
    • Journal Title

      Journal of Hard Tissue Biology

      Volume: 30 Issue: 1 Pages: 53-62

    • DOI

      10.2485/jhtb.30.53

    • NAID

      130007975649

    • ISSN
      1341-7649, 1880-828X
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Maxillofacial morphological factors related to acceleration of maxillary growth attributed to facial mask treatment: a structural superimposition study.2019

    • Author(s)
      Kajii TS, Sakaguchi Y, Sawa Y, Tamaoki S.
    • Journal Title

      Prog Orthod

      Volume: 20 Issue: 1 Pages: 2-2

    • DOI

      10.1186/s40510-018-0254-9

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] LpMab-23-recognizing cancer-type podoplanin is a novel predictor for a poor prognosis of early stage tongue cancer.2018

    • Author(s)
      Miyazaki, A., Nakai, H., Sonoda, T., Kaneko, M.K., Kato, Y., Sawa, Y., Hiratsuka, H.
    • Journal Title

      Oncotarget

      Volume: 9 Issue: 30 Pages: 21156-21165

    • DOI

      10.18632/oncotarget.24986

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Expression and Dynamics of Podoplanin in Cultured Osteoblasts with Mechanostress and Mineralization Stimulus2018

    • Author(s)
      Takenawa, T., Kanai, T., Kitamura, T., Yoshimura, Y., Sawa, Y., Iida, J.
    • Journal Title

      ACTA HISTOCHEMICA ET CYTOCHEMICA

      Volume: 51 Issue: 1 Pages: 41-52

    • DOI

      10.1267/ahc.17031

    • NAID

      130006405040

    • ISSN
      0044-5991, 1347-5800
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] P. gingivalis LPS 誘導性糖尿病性腎症マウスにおける白血球接着因子とFGF23 およびACE2の発現.2021

    • Author(s)
      梶原弘一郎, 沢禎彦, 玉置幸雄
    • Organizer
      第126回日本解剖学会総会・全国学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] An immunohistochemical study on the expression of bioactive molecules in the mouse kidney in P. gingivalis LPS-induced diabetic nephropathy.2020

    • Author(s)
      Kajiwara K, Sawa Y, Fujita T, Tamaoki S.
    • Organizer
      第68回国際歯科研究学会総会・学術大会(JADR)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Immunohistochemical study for the expression of renal physiologically active molecules in Porphyromonas gingivalis lipopolysaccharide-induced diabetic nephropathy.2020

    • Author(s)
      Kajiwara K, Sawa Y, Fujita T, Tamaoki S.
    • Organizer
      第62回歯科基礎医学会学術大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Development of scar suppression method applying TGF-β function of microfibril protein2019

    • Author(s)
      Fujita T, Kajiwara K, Takara, K, Sakagami R, Kojima H, Tamaoki S, Sawa Y.
    • Organizer
      4th Meeting of the International Association of Dental Research Asia Pacific Region 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CLEC-2 suppresses calcification in calvarial osteoblasts2019

    • Author(s)
      Takara, K, Kajiwara K, Fujita T, Kanai, T, Sakagami R, Kojima H, Sawa Y.
    • Organizer
      4th Meeting of the International Association of Dental Research Asia Pacific Region 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of TLR4 inhibitors on porphyromonas gingivalis LPS-induced diabetic nephropathy2019

    • Author(s)
      Kajiwara K, Fujita T, Takara, K, Sakagami R, Kojima H, Tamaoki S, Sawa Y.
    • Organizer
      4th Meeting of the International Association of Dental Research Asia Pacific Region 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ポドプラニン欠損マウスにおけるフェノタイプの検討2019

    • Author(s)
      高良憲洋、梶原 弘一郎、藤田 隆寛、坂上 竜資、小島 寛、沢 禎彦
    • Organizer
      第124回日本解剖学会総会・全国学術集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Porphyromonas gingivalis LPS に起因する糖尿病性腎症とTLR阻害剤による予防効果に関する研究2019

    • Author(s)
      梶原弘一郎、高良憲洋、髙田俊輔、玉置幸雄、吉永泰周、沢禎彦、坂上竜資
    • Organizer
      第61回秋季日本歯周病学会学術大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study for the diabetic nephropathy promoted by Porphyromonas gingivalis lipopolysaccharide and the prevension effect by TLR blocker2019

    • Author(s)
      Kajiwara K, Takara K, Takata S, Tamaoki S, Yoshinaga Y, Sawa Y , Sakagami R.
    • Organizer
      第66回 国際歯科研究学会日本部会総会・学術大会(JADR)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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