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Choroidal Neovascularization and Retinal Pigment Epithelium, and Laser Photocoagulation Treatment

Research Project

Project/Area Number 63480401
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Ophthalmology
Research InstitutionKansai Medical University

Principal Investigator

UYAMA Masanobu  Professor, Department of Ophthalmology, Kansai Medical University, 医学部・眼科学教室, 教授 (30025580)

Co-Investigator(Kenkyū-buntansha) NISHIMURA Tetsuya  Assistant Professor, Department of Ophthalmology, Kansai Medical University, 眼科学教室, 講師 (30156111)
ITAGAKI Takashi  Assistant Professor, Department of Ophthalmology, Kansai Medical University, 眼科学教室, 講師 (30140255)
KATOH Naoko  Instructor, Department of Ophthalmology, Kansai Medical University, 眼科学教室, 助手 (10194838)
TAKAHASHI Kanji  Instructor, Department of Ophthalmology, Kansai Medical University, 眼科学教室, 助手 (60216710)
YAMAGISHI Kazuya  Assistant Professor, Department of Ophthalmology, Kansai Medical University, 眼科学教室, 講師 (90174599)
大熊 紘  関西医科大学, 医学部, 講師 (70077775)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1989: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1988: ¥5,800,000 (Direct Cost: ¥5,800,000)
KeywordsChoroidal Neovascularization / Subretinal neovascularization / laser photocoagulation / retinal pigment epithelium / macular disease / retinal photocoagulation / age related macular degeneration / senile disciform macular degeneration / 新生血管黄斑症 / レーザー光凝固 / 網膜色素上皮障害
Research Abstract

1. Choroidal Neovascularization and the Retinal Pigment Epithelium
Choroidal neovascularization (ChNV) was produced experimentally in the macular area in monkey eyes by krypton laser photocoagulation (PC).
In natural course following PC, ChNV occurred in 1 or 2 weeks after PC, and developed in 3 to 4 weeks, thereafter ChNV regressed spontaneously in 5 to 8 weeks.
In histological study, we found, at the developing stage of ChNV, immature ChNVs were usually accompanied with migrated retinal pigment epithelial cells (RPE). At the stage of regression, RPE have proliferated to envelope ChNV as a single cell layer (sealing off).
We damaged RPE by systemic administration of sodium iodite (Na 10_3) pre or post PC, or intravitreal injection of a small amount of 1 Ornithine hydrochloride. Sodium iodite damaged RPE and the outer segment of the photoreceptors, and Ornithine damaged RPE selectively. In the eyes in which these drugs were administrated before PC, ChNV have not developed at all. In the ey … More es in which these drugs were administrated after development of ChNV, ChNV have lasted and grown in half a year without any evidence of spontaneous regression. Histologically, RPE have not shown proliferation and enveloping to ChNV in these eyes.
These results showed RPE cells have close relations to development and regression of ChNV, 1) migrated RPE cells may induce growing of ChN, 2) proliferations of RPE play a role to regression of ChNV, 3) damaged RPE has not shown such a role.
2. Histopathology of Laser Treatment for Experimental Choroidal Neovascularization
We studied histopathological process of lasered lesion following laser photocoagulation (PC) for experimental choroidal neovascularization (Ch NV). We produced well-developed and long-lasting ChNVs in monkey eyes by means of intense Krypton laser PC and succeedingly intravitreal injection of 1-ornithine hydrochloride. Those ChNVs were treated by orange beam (590nm) of dye laser.
After dye laser PC, clinically and fluoangiographically, in some lesions, ChNVs disappeared and the lesions became dry, however, the other lesions, ChNVs grew and the lesions lasted in wet condition. Histopathological studies were made for those PC lesions. Light and EM scopy revealed, at the dry lesions, subretinal space was filled with proliferated RPE cells and NVs were not found. At the wet lesions, new vessels were found numerously, accompanied with fibroblast-like RPE cells, fibroblast, and macrophages in subretinal space.
These results showed in laser treatment, closure of ChNV is essentially necessary by PC, and insufficient PC induces further development of NV and cellular proliferation in the subretinal space, and causes failure of treatment. Less

Report

(3 results)
  • 1990 Final Research Report Summary
  • 1989 Annual Research Report
  • 1988 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Naoko Katoh: "Choroidal vascular repair following orangeday laser photocoagulation" Japanese Journal of Ophthalmology. Vol.33. 166-172 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 加藤 直子: "レ-ザ-光凝固による脈絡膜毛細血管板の閉塞と修復過程についての実験的研究" 日本眼科学会雑誌. 94(2). 55-65 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 高橋 寛二: "網膜下新生血管の発育初期における網膜色素上皮の役割 ーオルニチンによる網膜色素上皮障害実験ー" 日本眼科学会雑誌. 94. 3-17 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 高橋 寛二: "網膜下新生血管の退縮における網膜色素上皮の役割 ーオルニチンによる網膜色素上皮障害実験ー" 日本眼科学会雑誌. 94. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 高橋 寛二: "実験的網膜下新生血管に対する色素レ-ザ-による光凝固治療 1.光凝固による治癒過程の組識学的検索" 日本眼科学会雑誌. 94. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 高橋 寛二: "実験的網膜下新生血管に対する色素レ-ザ-による光凝固治療 2.未治癒病巣の組識学的検索" 日本眼科学会雑誌. 94. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masanobu Uyama: "Retinal Pigment Epithelium ″Experimental Ornithineーinduced Retinopathy″" edited by M.Zingirian and F.Cardillo Piccolino Kugler & Ghedini Publications,Amsterdam,Berkeley Milano, (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kanji Takahashi: "Retinal Pigment Epithelium ″Choroidal neovascularization and the retinal Pigment epithelium″" edited by M.Zingirian and F.Cardillo piccloino Kugler & Ghedini Publications,Amsterdam,Barkeley,Milano, (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Naoko Katoh: "Choroidal vascular repair following orange dye laser photocoagulation" Japanese Journal of Ophthalmology. Vol. 33. 166-172 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Naoko Katoh: "The process of Occlusion and Re-construction of the choriocapillaries following dye laser photocoagulation" Acta Soc. Ophthalmol. Jpn. 94 (2). 55-65 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kanji Takahashi: "The role of retinal pigment epithelium in the early stage of development of subretinal neovascularization" Acta Soc. Ophthalmol. Jpn. 94 (1). 3-17 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masanobu Uyama: "Experimental ornithine-induced retinopathy" Retinal pigment epithelium edited by M. Zingirian and F. Cardillo Piccolino, Kugler & Ghedini Publications, Amsterdam, Berkeley, Milano. 45-52 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Kanji Takahashi: "Choroidal neovascularization and the retinal pigment epithelium"" Retinal pigment epithelium edited by M. Zingirian and F. Cardillo Piccolino, Kugler & Ghedini Publications, Amsterdam, Berkeley, Milano. 211-218 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Naoko Katoh: "Choroidal vascular repair following orange dye laser photocoagulation" Japanese Journal of Ophthalmology. Vol.33. 166-172 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 加藤直子: "レ-ザ-光凝固による脈絡膜毛細血管板の閉塞と修復過程についての実験的研究" 日本眼科学会雑誌. 94(2). 55-65 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 高橋寛二: "網膜下新生血管の発育初期における網膜色素上皮の役割ーオルニチンによる網膜色素上皮障害実験ー" 日本眼科学会雑誌. 94. 3-17 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 高橋寛二: "網膜上新生血管の退縮における網膜色素上皮の役割ーオリニチンによる網膜色素上皮障害実験ー" 日本眼科学会雑誌. 94. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 高橋寛二: "実験的網膜下新生血管に対する色素レ-ザ-による光凝固治療1.光凝固による治癒過程の組織学的検索" 日本眼科学会雑誌. 94. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 高橋寛二: "実験的網膜下新生血管に対する色素レ-ザ-による光凝固に治療2.未治癒病巣の組織学的検索" 日本眼科学会雑誌. 94. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Masanobu Uyama: "Retinal Pigment Epithelium"Experimental Ornithine-induced Retinopathy"" edited by M.Zingirian and F.Cardillo Piccolino Kugirer&Ghedini Publications,Amsterdam,Berkeley Milano, 45-52 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Kanji Takahashi: "Renji Pigment Epithelium"Choroidal neovascularization and theretinal pigment epithelium"" edited by M.Zingirian and F.Cardillo Piccolino Kugler&Ghedini Publications,Amsterdam,Barkeley,Milano, 211-218 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 山岸和矢,大熊紘,板垣隆,加藤直子,宇山昌延: 日本眼科学会雑誌. 92. 1618-1628 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 山岸和矢,大熊紘,板垣隆,加藤直子,高橋寛二,宇山昌延: 日本眼科学会雑誌. 92. 1629-1636 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 高橋寛二,板垣紘,山岸和矢,大熊紘,宇山昌延: 日本眼科紀要. 39. 1444-1450 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 高橋寛二,大熊紘,板垣隆,宇山昌延: 日本眼科学会雑誌. 92. 1797-1808 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 高橋寛二,大熊紘,板垣隆,宇山昌延: 日本眼科学会雑誌. 92. 1809-1817 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Takahashi K.;Ohkuma H.;Uyama M.: Trans Asia:Pacific Acad.Ophthalmol.11. 468-470 (1988)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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