JP5363123B2 - 網膜神経又は視神経の保護剤 - Google Patents
網膜神経又は視神経の保護剤 Download PDFInfo
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- JP5363123B2 JP5363123B2 JP2008556121A JP2008556121A JP5363123B2 JP 5363123 B2 JP5363123 B2 JP 5363123B2 JP 2008556121 A JP2008556121 A JP 2008556121A JP 2008556121 A JP2008556121 A JP 2008556121A JP 5363123 B2 JP5363123 B2 JP 5363123B2
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Description
本発明は、アルドース還元酵素(AR)阻害作用を有する化合物を有効成分とする、網膜神経又は視神経の保護剤である。本発明の網膜神経又は視神経の保護剤は、例えば、視機能の低下若しくは悪化の予防又は治療効果を有している。
実験はマウス急性眼動脈梗塞モデル、すなわちマウス眼動脈閉塞モデルを用いた。実験1として、8-10週齢のC57BL/6N系のノーマルマウス(野生型マウス)を用い、AR阻害作用を有する化合物として、フィダレスタットの治療効果を評価した。ここでは、賦形剤のみを投与するコントロール群とフィダレスタットを投与するフィダレスタット投与群の2群とした。また、実験2として、8-10週齢のC57BL/6N系のノーマルマウス(野生型マウス:AR+/+マウス)とAR遺伝子欠損マウス(AR-/-マウス)を用いて、ARの役割について検討した。こちらは薬物投与群はなく、野生型マウス群(AR+/+マウス)とAR遺伝子欠損マウス群(AR-/-マウス)の2群とした。
(1)網膜神経節細胞の生存についての病理所見
[実験1]
コントロール群では、2時間の網膜虚血に続く22時間の虚血後再灌流によって、網膜虚血側において網膜神経節細胞死(▼)を示す所見が見られた(図1:D2)。しかし、網膜非虚血側では、網膜神経節細胞死を示す所見はみられなかった(図1:D1)。一方、フィダレスタット投与群では、網膜虚血側および網膜非虚血側とも網膜神経節細胞死を示す所見は見られなかった(図1:D3、D4)。
網膜虚血側においては、野生型マウス群では網膜神経節細胞死を示す所見が見られた(図2:A2)が、AR遺伝子欠損マウス群では見られなかった(図2:A4)。一方、網膜非虚血側では、両マウス群とも網膜神経節細胞死を示す所見は見られなかった(図2:A1、A3)。
[実験1]
結果は表1に示す。コントロール群の網膜虚血側における生存網膜神経節細胞数は、網膜非虚血側に比べて有意に減少していた(P < 0.001)。一方、フィダレスタット投与群では、網膜虚血側における生存網膜神経節細胞数はコントロール群に比べて有意に多かった(P < 0.001)。網膜非虚血側では、フィダレスタット投与群及びコントロール群とも生存網膜神経節細胞数に差は見られなかった。
結果は表2に示す。野生型マウス群では、網膜虚血側における生存網膜神経節細胞数が網膜非虚血側に比べて有意に減少した(P < 0.001)。一方、AR遺伝子欠損マウス群では、網膜虚血側における生存網膜神経節細胞数が野生型マウスの場合に比べて有意に多かった(P < 0.01)。網膜非虚血側では、野生型マウス群及びAR遺伝子欠損マウス群とも、生存網膜神経節細胞数に差は見られなかった。
網膜神経節細胞は網膜内の光受容と神経伝達において重要な役割を果たし、網膜神経節細胞の変性又は脱落は、視力低下、視野欠損などの視機能障害を引き起こすと考えられている。今回、マウス急性眼動脈梗塞モデル、すなわちマウス眼動脈閉塞モデルを用いて、網膜神経節細胞に対するフィダレスタットの効果及びAR遺伝子欠損の効果を検討した。その結果、フィダレスタットは網膜虚血再灌流後に見られる網膜神経節細胞死や生存網膜神経節細胞数の減少に対して顕著な有効性を示した。また、その効果は、AR遺伝子欠損による効果とほぼ同等のものであった。
Claims (6)
- 前記緑内障が、原発開放隅角緑内障、原発閉塞隅角緑内障、急性閉塞隅角緑内障、続発性緑内障、発達緑内障、及び正常眼圧緑内障からなる群より選択される、
請求項1に記載の視機能の低下若しくは悪化の予防又は治療剤。 - 前記加齢性黄斑変性症に起因する視機能の低下若しくは悪化が、加齢性黄斑変性症に対する光凝固術又は硝子体手術の後に起こるものであり、
前記BRVO(網膜静脈分枝閉塞症)若しくは前記CRVO(網膜中心静脈閉塞症)に起因する視機能の低下若しくは悪化が、BRVO(網膜静脈分枝閉塞症)若しくはCRVO(網膜中心静脈閉塞症)、に対する光凝固術又は硝子体手術の後に起こるものであり、
前記緑内障に起因する視機能の低下若しくは悪化が、原発開放隅角緑内障若しくは正常眼圧緑内障に対するレーザー線維柱帯形成術の後に起こるもの、又は原発閉塞隅角緑内障に対するレーザー的虹彩切開術若しくは手術的虹彩切除術の後に起こるものである、
請求項1又は2に記載の視機能の低下若しくは悪化の予防又は治療剤。 - 前記視機能の低下若しくは悪化が、加齢性黄斑変性症に起因するものである、請求項1〜3のいずれか一項に記載の視機能の低下若しくは悪化の予防又は治療剤。
- 前記一般式に示す化合物が、(2S,4S)−6−フルオロ−2’,5’−ジオキソスピロ[クロマン−4,4’−イミダゾリジン]−2−カルボキサミドである、請求項1〜4のいずれか一項に記載の視機能の低下若しくは悪化の予防又は治療剤。
- 前記視機能の低下若しくは悪化が、前記眼疾患における網膜虚血再灌流障害に起因するものである、請求項1〜3及び5のいずれか一項に記載の視機能の低下若しくは悪化の予防又は治療剤。
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US20120301478A1 (en) * | 2010-01-14 | 2012-11-29 | Yuichiro Ogura | Pharmaceutical for Preventing or Treating Disorders Accompanied by Ocular Angiogenesis and/or Elevated Ocular Vascular Permeability |
AU2011246232A1 (en) | 2010-04-28 | 2012-11-01 | Sanwa Kagaku Kenkyusho Co., Ltd. | Prophylactic or therapeutic medication for inner ear disorders |
WO2012105610A1 (ja) | 2011-02-02 | 2012-08-09 | 公立大学法人名古屋市立大学 | 眼内血管新生及び/又は眼内血管透過性亢進を伴う疾患の予防又は治療のための医薬 |
KR101423631B1 (ko) * | 2012-08-17 | 2014-07-25 | 주식회사파마킹 | 에스-알릴엘-시스테인을 유효성분으로 포함하는 안질환 예방 또는 치료용 조성물 및 이를 포함하는 의약제제 |
EP3192510B1 (en) | 2014-09-11 | 2022-01-05 | Sumitomo Dainippon Pharma Co., Ltd. | Ophthalmic suspension formulation |
KR102007640B1 (ko) | 2017-11-29 | 2019-08-07 | 퓨쳐메디신 주식회사 | 아데노신 유도체를 포함하는 망막 질환 또는 시신경 질환 예방 및 치료용 약학적 조성물 |
WO2019152875A1 (en) | 2018-02-01 | 2019-08-08 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
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PL2110141T3 (pl) | 2013-09-30 |
CA2673751C (en) | 2012-05-08 |
US8536212B2 (en) | 2013-09-17 |
WO2008093691A1 (ja) | 2008-08-07 |
US20100216856A1 (en) | 2010-08-26 |
AU2008210970A1 (en) | 2008-08-07 |
CN103222974A (zh) | 2013-07-31 |
AU2008210970B2 (en) | 2012-11-29 |
EP2594267A1 (en) | 2013-05-22 |
EP2110141A4 (en) | 2011-01-19 |
EP2110141B1 (en) | 2013-04-03 |
CN101594884A (zh) | 2009-12-02 |
KR20090104014A (ko) | 2009-10-05 |
JPWO2008093691A1 (ja) | 2010-05-20 |
ES2409930T3 (es) | 2013-06-28 |
DK2110141T3 (da) | 2013-06-17 |
EP2110141A1 (en) | 2009-10-21 |
CA2673751A1 (en) | 2008-08-07 |
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