JP6231783B2 - 完全フロイントアジュバント投与による眼瞼状態の変化方法 - Google Patents
完全フロイントアジュバント投与による眼瞼状態の変化方法 Download PDFInfo
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Description
(1)ヒトを除く哺乳動物に対して完全フロイントアジュバントを投与することによる眼瞼の状態を変化させる方法。
(4)哺乳動物がラット又はウサギである、上記(1)又は(2)に記載の方法。
本発明の完全フロイントアジュバント投与による眼瞼状態の変化方法は、ヒトを除く哺乳動物に対して完全フロイントアジュバントを投与することによる眼瞼の状態を変化させることを特徴とする。本発明の完全フロイントアジュバント投与による眼瞼状態の変化方法に利用される「哺乳動物」とは、ヒトを除くほか、特に制限はなく、具体例として、マウス、ラット、ハムスター、モルモット、ウサギ、ネコ、イヌ、サル等が挙げられ、マウス、ラット又はウサギが好ましく、ラット又はウサギが特に好ましい。雌雄、週齢、体重については、特に制限はない。
(実験方法)
約2kgの雄性日本白色種ウサギに完全フロイントアジュバントまたは生理食塩液を上眼瞼に10μLずつ3箇所に投与した。投与後7日目、14日目、21日目に、スリットランプを用いて観察し、上眼瞼の眼瞼縁を耳側、中央部、鼻側の3分画に等分してそれぞれの分画についてマイボーム腺開口部の閉塞、開口部周辺の毛細血管拡張スコアを下記表1、2に示す基準に従い判定し、3分画のスコアの和を1眼あたりのスコアとして算出した。この実験では、「マイボーム腺開口部の閉塞」として、マイボーム腺開口部が白色または黄白色に混濁した状態を確認した。また、「拡張した毛細血管」とは、血管径が拡大した結果、通常視認できない毛細血管が確認できる状態にある毛細血管をいう。
マイボーム腺開口部閉塞スコア(各群8匹)についての結果を表3、マイボーム腺開口部周辺毛細血管拡張スコア(各群8匹)についての結果を表4に示す。
(実験方法)
約2kgの雄性日本白色種ウサギに完全フロイントアジュバントを上眼瞼に10μLずつ3箇所に投与した。惹起4日目に、スリットランプを用いて右上眼瞼のマイボーム腺開口部ならびにその周辺を観察し、スコア判定を行った。スコア判定は、上記表1、2に示した基準に従った。各スコアの平均値のばらつきが小さくなるように、生理食塩液投与群とTobraDexST(0.3% tobramycin、0.05% dexamethasone)投与群に群分けした(各群8匹)。惹起後5日目より、生理食塩液、TobraDexST点眼液を10日間右眼に点眼した(50μL/眼、1日4回)。惹起11日目ならびに15日目にスリットランプを用いて、右上眼瞼縁のマイボーム腺開口部ならびにその周辺を観察し、スコア判定を行った。マイボーム腺開口部閉塞スコアについての結果を表5、マイボーム腺開口部周辺毛細血管拡張スコアについての結果を表6に示す。
TobraDexST点眼液投与群は生理食塩液投与群に比べ、明らかにマイボーム腺開口部の閉塞スコア及び毛細血管拡張スコアを改善し、本試験系で薬効評価が可能なことが明らかとなった。
(実験方法)
5週齢の雌性Lewisラットに完全フロイントアジュバントを25μL右上眼瞼に1箇所投与した。惹起7日目に、スリットランプを用いて右上眼瞼のマイボーム腺開口部周辺を観察し、毛細血管拡張スコア判定を行った。毛細血管拡張スコア判定は、下記表7に示す基準に従った。各スコアの平均値のばらつきが小さくなるように、生理食塩液投与群とリンデロン(登録商標)点眼・点耳・点鼻液0.1%(0.1% ベタメタゾンリン酸エステルナトリウム)投与群に群分けした(各群5または6眼)。惹起後8日目より、生理食塩液(5μL/眼、1日4回)、リンデロン(登録商標)点眼・点耳・点鼻液0.1%を21日間右眼に点眼した(5μL/眼、1日2回又は1回)。惹起14日目、21日目及び28日目にスリットランプを用いて、右上眼瞼のマイボーム腺開口部周辺を観察し、スコア判定を行った。
マイボーム腺開口部周辺毛細血管拡張スコアの結果を表8に示す。
Claims (9)
- げっ歯目又はウサギ目に対して完全フロイントアジュバントを投与することによる眼瞼の状態を変化させる方法であって、該眼瞼の状態の変化が、マイボーム腺開口部の閉塞及び/又はマイボーム腺開口部周辺毛細血管の拡張である、方法。
- げっ歯目又はウサギ目がラット又はウサギである、請求項1に記載の方法。
- 完全フロイントアジュバントを上眼瞼に投与する、請求項1又は2に記載の方法。
- 投与する完全フロイントアジュバントの量が1〜300μLである、請求項1〜3のいずれかに記載の方法。
- 完全フロイントアジュバントの投与後3日間以上経過させる、請求項1〜4のいずれかに記載の方法。
- 請求項1〜5のいずれかに記載の方法によるマイボーム腺開口部の閉塞及び/又はマイボーム腺開口部周辺毛細血管の拡張を伴う眼瞼疾患の治療又は予防効果を評価するためのモデル動物の製造方法。
- 眼瞼疾患が眼瞼炎、眼瞼縁炎、マイボーム腺機能不全、マイボーム腺炎又はマイボーム腺梗塞である、請求項6に記載のモデル動物の製造方法。
- 請求項6又は7に記載の製造方法によりモデル動物を製造し、そのモデル動物に被験物質を投与し、その眼瞼の状態を測定することを特徴とする、眼瞼疾患の治療又は予防効果を有する物質のスクリーニング方法であって、該眼瞼の状態がマイボーム腺開口部の閉塞及び/又はマイボーム腺開口部周辺毛細血管の拡張である、スクリーニング方法。
- 被験物質を点眼投与する請求項8に記載のスクリーニング方法。
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