Researchers Database

NOZAKI Miho

    Graduate School of Medical Sciences Department of Ophthalmology and Visual Science Professor
Last Updated :2024/06/11

Researcher Information

URL

J-Global ID

Research Interests

  • laser photocoagulation   diabetic macular edema (DME)   レーザー網膜光凝固   糖尿病黄斑浮腫   糖尿病網膜症   血管内皮増殖因子   加齢黄斑変性   血管新生   diabetic retinopathy   VEGF   age-related macular degeneration   angiogenesis   

Research Areas

  • Life sciences / Ophthalmology

Education

  •        - 1993  Nagoya City University  医学部  医学科
  •        - 1993  Nagoya City University  Faculty of Medicine

Association Memberships

  • 日本糖尿病眼学会   日本眼科学会   眼循環学会   日本緑内障学会   網膜硝子体学会   眼炎症学会   

Published Papers

MISC

Awards & Honors

  • 2019/10 名古屋市立大学 高インパクト論文賞
     
    受賞者: 高瀬 範明;野崎;実穂
  • 2007 名古屋市立大学医学部同窓会 瑞友会賞(学術部門)
     
    受賞者: 野崎 実穂

Research Grants & Projects

  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2022/04 -2025/03 
    Author : 安川 力; 野崎 実穂; 平原 修一郎; 小椋 俊太郎; 平野 佳男; 加藤 亜紀
  • 日本学術振興会:科学研究費助成事業 基盤研究(C)
    Date (from‐to) : 2020/04 -2023/03 
    Author : 野崎 実穂; 高瀬 範明; 小椋 祐一郎
     
    名古屋市立大学病院で汎網膜光凝固を施行して1年以上経過した糖尿病網膜症のうち、経時的に網膜光凝固斑の眼底自発蛍光が撮影可能であった13例19眼(従来凝固7眼、ショートパルス凝固12眼)を対象として自発蛍光の定量化を行なった。網膜光凝固は黄色波長を用い、スポットサイズ200μm、灰白色の凝固斑が得られる出力で行った。眼底自発蛍光はOptos 200TxあるいはOptos Californiaを用いて凝固後1か月、3か月、6か月、12か月に撮影し、画像解析ソフト (Image J)を用いて、網膜血管アーケード近傍の凝固斑の自発蛍光の明度(mean grey value)とアーケード血管(静脈)の明度との比を算出した。 従来凝固による網膜光凝固1か月、3か月、6か月、12か月後の凝固斑の眼底自発蛍光の明度はそれぞれ1.52±0.16、1.29±0.08、1.18±0.75、0.95±0.13、ショートパルス凝固では1.88±0.14、1.49±0.13、1.26±0.11、1.20±0.11と、両群とも凝固斑の自発蛍光は経時的に低下し、凝固後1か月、6か月、12か月で従来凝固がショートパルス凝固と比較して有意に凝固斑に明度は低く(p < 0.01)、低蛍光化を認めた。 追加凝固が必要となった眼数は従来凝固とショートパルス凝固で有意な差はみられなかったが、ショートパルス凝固を用いた網膜光凝固は、従来凝固と比べ凝固斑の低蛍光化が緩徐で、光凝固後のatrophic creepが生じにくい反面、汎網膜光凝固の虚血改善効果が緩徐となる可能性が示唆され、眼底自発蛍光を用いた評価法は有用と考えられた。
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2018/04 -2021/03 
    Author : Yuichiro Ogura
     
    In diabetic retinopathy, dropout of pericytes from retinal capillary walls evokes vascular hyperpermeability. Furthermore, progression of vessel obstruction leads to the formation of fibrovascular membranes, which create blinding conditions including retinal detachment. In the present study, by exploiting a pericyte-deficient retinopathy mouse model, we have elucidated that remaining pericytes and retinal pigment epithelium cells transdifferentiate into myofibroblasts, and activated microglia promotes fibrosis during the transition from acute to chronic inflammation. This machinery may underlie the fibrovascular membrane formation in human diabetic retinopathy.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2017/04 -2019/03 
    Author : Hasegawa Norio; Nozaki Miho
     
    Endpoint Management (EPM) software is one of the subthreshold laser. The level of HSP70 in the RPE was significantly elevated after laser treatment in EPM group, whereas there was no significant elevation in conventional setting group. On day 1 after laser, both EPM and conventional laser group showed destruction of ZO-1 and RPE65 staining, but EpM group showed normal staining of ZO-1 and RPE65 on day 3. However conventional laser group showed destruction of ZO-1 and RPE staining even on day 7 after laser. Our results showed that EpM laser induced HSP70 expression in the RPE, and early recovery of tight junction of the RPE, and the function of the RPE cells. Clinical data showed EpM was effective in serous retinal detachment type classified by OCT in the eyes of refractory diabetic macular edema.Our findings suggest that EpM laser might be effective in the macular diseases, via induction of the RPE remodeling.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2016/04 -2019/03 
    Author : Nozaki Miho
     
    We evaluated the efficacy of anti-CCR3 treatment in mouse oxygen-induced retinopathy model. In OIR mouse retina, CCR3 and eotaxin were significantly up-regulated. And intravitreous injection of anti-CCR3 antibody suppressed retinal neovascularization, and VEGF 164 mRNA but not VEGF120 mRNA. We also studied the fibrovascular membrane which was surgically excised during vitrectomy in proliferative diabetic retinopathy eyes. In vascular endothelial cells, CCR3 and eotaxin were found in the fibrovascular membrane, but not in epiretinal membrane. From our studies, we demonstrated that CCR3-eotaxin pathway contributes to retinal angiogenesis, and that anti-CCR3 antibody treatment suppressed retinal neovascularization. Anti-CCR3 treatment may have potential as a new therapy for proliferative retinopathies such as diabetic retinopathy and retinopathy of prematurity.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2015/04 -2018/03 
    Author : Ogura Yuichiro; Koh Gou Young; Kim Pilhan
     
    In diabetic retinopathy (DR), dropout of pericytes from capillary walls is assumed to initiate various vascular dysfunctions, including blood-retina barrier breakdown. However, hyperglycemic mice fail to reproduce retinal pathology characteristic of DR. In this research project, we established a new mouse model of DR in adult mice, by transiently inhibiting pericyte recruitment to developing retinal vessels during neonatal periods following single intraperitoneal injections of an anti-PDGFRβ antibody. Furthermore, we uncovered that endothelial cells and macrophages formed a cycle of vessel damage via VEGF-A, PlGF, and angiopoietin-2 in pericyte-deficient retinal vessels.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2015/04 -2018/03 
    Author : Hirano Yoshio
     
    Age-related macular degeneration (AMD) is a vision-threatening disease and the number of patients continues to grow. Recently developed anti-vascular endothelial growth factor (VEGF) therapy for choroidal neovascularization (CNV) has revolutionized the treatment in visual improvement. However, there are still ineffective cases or most of the patients need multiple injections of anti-VEGF agents. We aimed to elucidate the pathophysiology of CNV using mouse laser CNV model to investigate a new target for CNV. Inflammation and apoptosis were associated with the CNV formation. Therefore, to control inflammation and apoptosis chould be an alternative therapy to suppress vision loss associated with CNV in AMD.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2013/04 -2016/03 
    Author : YASUKAWA Tsutomu; NOZAKI Miho; OGURA Yuichiro
     
    Since anti-vascular endothelial growth factor (VEGF) therapies have been commercially available for the treatment of exudative age-related macular degeneration, myopic choroidal neovascularization, and macular edema secondary to diabetic retinopathy and retinal vein occlusion, visual outcomes are greatly improved. However, many patients should be treated repeatedly. One of strategies to address this issue is the development of drug delivery systems to achieve controlled release of drug. We confirmed the feasibility of slow release of growth factors and cytokines impregnated into gelatin hydrogel by making an experimental model of proliferative vitreoretinopathy in rabbits. Also we currently perform clinical and basic researches to evaluate additional impacts of tissue plasminogen activator, a fibrinolytic serine protease on choroidal neovascularization, which may be not obtained by anti-VEGF monotherapies. Furthermore, we prepare for a patent regarding a new drug delivery system.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2011 -2013 
    Author : YOSHIDA MUNENORI; OGURA Yuichiro; NOZAKI Miho
     
    Short pulse duration laser has been reported that induced less damage into inner retina and less pain for patients. However, some researchers reported that retinal photocoagulation with short pulse laser might be less effective than that with conventional laser photocoagulation. The purpose of this study was to determine the efficacy of short pulse laser photocoagulation in ischemic murine retina. Short pulse laser induced less damage to the murine inner retina, and the size of lateral scar formation was 70% of that with conventional laser. And the reduction of VEGF was less with short pulse laser compared with conventional laser. Our findings indicated that we have to perform laser photocoagulation with tighter spacing and more number of treatment spots when we use short pulse laser.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2009 -2012 
    Author : OGURA Yuichiro; YASUKAWA Tsutomu; NOZAKI Miho; MATSUBARA Akihisa
     
    Previous studies have shown that siRNAs could suppress angiogenesis via stimulation of toll-like receptor (TLR) -3. The purpose of this study was to determine the efficacy of atelocollagen to deliver siRNA without TLR3 stimulation in the laser-induced choroidal neovascularization (CNV) model. The mean CNV volumes were significantly smaller in the naked siRNA-Luc, naked siRNA-Vegfa, or siRNA-Vegfa /atelocollagen complex compared with PBS, atelocollagen, or siRNA-Luc/atelocollagen complex-injected mice (p < 0.05). These findings demonstrate that atelocollagen may deliver siRNA without non-specific TLR3 stimulation in the murine laser-CNV model.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2009 -2011 
    Author : YASUKAWA Tsutomu; OGURA Yuichiro; NOZAKI Miho
     
    Age-related macular degeneration(AMD) is a major cause of legal blindness in the adult. Understanding of aging changes in eyes may be required to elucidate the pathogenesis of AMD and develop new prophylactic modalities. The first senescent change in the eye is the accumulation of lipofuscin, granules refractory to lysosomal degradation into retinal pigment epithelial cells. In this study, the rabbit AMD model was developed by injecting imitation lipofuscin into the subretinal space. This model revealed abnormal fundus autofluorescence similar to the findings observed in human aging eyes with or without AMD. This model mimicked the pathology of AMD and might be useful to elucidate the biogenesis of abnormal fundus autofluorescence and the pathogenesis of AMD.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2009 -2011 
    Author : NOZAKI Miho; OGURA Yuichiro; YASUKAWA Tsutomu
     
    Osteopontin(OPN) is a chemokine like phospholyrated glycoprotein and involved in inflammation, tumor genesis and wound healing. The purpose of the study was to clarify a role of OPN in the development of laser-induced choroidal neovascularization(CNV) in mice. OPN neutralizing Abs significantly abolished CNV area. Genetic ablation of OPN also significantly suppressed CNV area compared with wild-type mice. OPN was immunopositive in the CNV lesions and co-localized with infiltrated macrophages. Collectively these findings demonstrate a significant role of OPN in the development of CNV. OPN blockade may be considered further therapeutic potential for age-related macular degeneration.
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 2007 -2008 
    Author : NOZAKI Miho; OGURA Yuichiro; SAKURAI Eiji; YASUKAWA Tsutomu
     
    なぜ加齢黄斑変性は黄斑部にのみ脈絡膜新生血管が発生するのか?なぜ黄斑部(中心窩)は無血管なのか?血管新生内皮増殖因子(VEGF-A)を血管新生促進あるいは抑制に働かせるスイッチの働きを持つSPARC に着目し、マウスレーザー誘導実験的脈絡膜新生血管モデルを用いて検討した。レーザー照射後、SPARCの投与により、血管新生は有意に促進され、黄斑部における血管新生促進作用にSPARCが関与しており、今後加齢黄斑変性の治療ターゲットになりうると考えられた
  • 日本学術振興会:科学研究費助成事業
    Date (from‐to) : 2004 -2004 
    Author : 野崎 実穂
  • 日本学術振興会:科学研究費助成事業
    Date (from‐to) : 2002 -2003 
    Author : 野崎 実穂
     
    平成14年度の研究により、自然発症糖尿病モデル動物であるOLETFラット網膜血管内皮において接着分子が増加していることが明らかとなった。平成15年度は、インスリン依存性糖尿病(IDDM)のモデルとして、アロキサンによる実験的糖尿病ラットを用いて、網膜における接着分子について検討した。生後8週齢のSDラットにアロキサン30mg/kgを静脈注射で投与し、糖尿病ラットを作製した。生後72週に、4%パラホルムアルデヒドおよび0.1MPBS混合液で灌流固定を施行した後、眼球を摘出し、パラフィン包埋し厚さ4μmの連続切片を作製した。コントロールとして、同週齢のSDラットを用い、同様にパラフィン包埋、連続切片を作製した。 抗P-セレクチン抗体(ARP2-4)およびIntercellular adhesion molecules-1(ICAM-1)抗体(IA29)を用いて、_SABC(Streptoavidin Biotin Complex)法により免疫染色を行い、光学顕微鏡で観察した。アロキサンによる実験的糖尿病ラット網膜の血管内皮で、P-セレクチン、ICAM-1とも強く染色されたが、コントロールラット網膜の血管内皮ではICAM-1はわずかに、P-セレクチンはほとんど染色性を認めなかった。以上のことから、自然発症糖尿病ラット網膜と同様に、実験的糖尿病ラット網膜においてもP-セレクチン、ICAM-1が増加しており、糖尿病網膜症発症と接着分子P-selectin、ICAM-1の関連性が強く示唆された。
  • 日本学術振興会:科学研究費助成事業
    Date (from‐to) : 1998 -1999 
    Author : 野崎 実穂
     
    白色家兎を用い、角膜に深さ約200μmの切創を作製し、創作製直後、3時間、6時間、12時間、3日、7日、4週、2か月および3か月後に屠殺し、直ちに眼球を取り出し、4%パラホルムアルデヒト・0.1%グルタールアルデヒド・リン酸塩緩衝液で固定し、パラフィンに包埋して厚さ3μmの連続切片を作製した。水和後の切片に一般染色法としてヘマトキシリン・エオジン染色、硫酸基含有酸性複合糖質検出法として増感高鉄ジアミン(S-HID)染色を行った。また、S-HID染色に先立ってchondroitinase B(ChaseB)消化法、Chase B-testicular hyaluronidase二重消化法、またはChase ABC、Chase ABC-keratanase二重消化法を併用して、光学顕微鏡で観察した。角膜創傷治癒過程で、角膜実質創周囲の主要なグリコサミノグリカン分子種は、創作製7日後ではコンドロイチン硫酸A/Cであった。そして、創作製後2週後にはデルマタン硫酸が出現し、創作製1か月後からケラタン硫酸がみられた。角膜創傷治癒の再構築過程の角膜実質における主要なグリコサミノグリカン分子種は、経時的に低分子量のものへと変化した。この結果は、昨年の角膜発生過程のグリコサミノグリカンの動態と同様であった。この、グリコミノグリカンの動態により、角膜実質のコラーゲン線維がより緻密に配列し、角膜は透明性を獲得すると考えられた。 また、臨床的に前眼部形成異常のひとつで角膜混濁をきたすPeters奇形について、合併する緑内障との観点から検討した。Peters奇形を合併していた緑内障症例では、術後の眼圧下降により角膜のびまん性混濁だけでなく角膜中央部の混濁も軽減したことから、眼圧を下降させることにより、高眼圧が原因の角膜実質浮腫が消失するだけでなく、欠損していない部の健全な内皮細胞が機能できるようになり再構築機転が働くため、Peters奇形による角膜中央部の混濁も軽減するものと考えられた。
  • 日本学術振興会:科学研究費助成事業
    Date (from‐to) : 1997 -1998 
    Author : 小椋 祐一郎; 野崎 実穂; 水野 晋一
     
    網膜において虚血再灌流後には血管内皮には様々な接着分子が発現し、白血球の集積に関与していると考えられている。これまで網膜虚血再灌流後に網膜血管内皮に発現している接着分子の検討は生化学的、または組織学的な方法に限定されていた。そこで、今回我々は網膜血管内皮に発現している接着分子intracellular adhesion molecule-1(ICAM-1)、P-selectinの発現を生体内で観察し、定量する方法を試みた。方法としては抗ICAM-1抗体、抗P-selectin抗体をFLUOTAGを用いてFITCで標識した。 1mgの抗体を緩衝液内でFITCと室温下に2時間かけ結合させた。Sephadex G-25Mカラムにより結合しなかったFITCを除去し、FITC標識された抗体を分離した。有色Long-Evansラットに対し、全身麻酔下に視神経結紮術により60分の網膜虚血を作成した後、再灌流させた。様々な再灌流時間の後、再び、全身麻酔下に尾静脈にカテーテルを留置し、標識した抗体を2mg/kg投与した。ラットの眼底は走査型レーザー検眼鏡(SLO)を用いてargon laserを励起光として観察し、動画としてS-VHSビデオテープに録画した。SLOによって得られた画像はコンピューターに取り込み、画像解析ソフトを用いて種々の解析を行った。 励起光のargon laserの強度、filterゲインを様々に変化させたが、今回の研究ではSLOによりFITC標識された抗ICAM-1抗体、抗P-selectin抗体の蛍光を充分なコントラストでとらえることはできなかった。励起光のargon laserの強度を更に強くし、抗体分子に対する、FITC分子の結合比率を更に大きくすることにより、ICAM-1、P-selectinの発現を生体内で観察することが可能になる可能性があると考えられた。
  • Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research
    Date (from‐to) : 1997 -1998 
    Author : OZEKI Hironori; NOZAKI Miho; MIZUNO Shinichi
     
    Using retinoic acid as a teratogenic factor, we made experimental models in mouse fetuses for various human ocular anomalies, including persistent hyperplastic primary vitreous, uveal coloboma. Axenfeld-Rieger syndrome, and Peters' anomaly. And we elucidated that these ocular anomalies are caused by the abnormal neural crest cell migration. In addition, we determined their critical periods in mice ; from day 7 through day 11 of gestation. Based on the results, we inferred corresponding periods in human ; from 2.5 weeks through 7 weeks of gestation. We believe that these results lead to the prevention of human ocular congenital anomalies. We also clarified the role of hialuronic acid in the developmental process of the eyelids. We also found the delay in changes of main glycosaminoglycans in the eyelids of spontaneous small eye mice. Clinically, we reviewed cases with Axenfeld-Rieger syndrome, Peters' anomaly and uveal coloboma encountered at our hospital. We warned that these ocular anomalies frequently accompanied other anomalies in the tissues derived from neural crest cells. To prevent ocular anomalies, we are to investigate the role of programmed cell death and growth factors in the developmental process of the normal and malformed eye.
  • siRNAによる非特異的血管新生抑制
  • 網膜中心窩はなぜ無血管なのか
  • 加齢黄斑変性の病態解明
  • 糖尿病ラット網膜における接着分子
  • 小眼球症マウスにおける眼瞼発生過程の組織学的・組織化学的研究
  • 眼先天異常の組織学的・組織化学的研究
  • Enhanced expression of adhesion molecules of the retinal vascular endothelium in diabetic rats
  • Histological and histochemical studies in the developing eyelid of experimental microphthalmic mice.
  • Histological and histochemical studies on the developmental process of ocular malformations


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