JP6294773B2 - 口腔粘膜疾患の予防または治療用経口製剤 - Google Patents
口腔粘膜疾患の予防または治療用経口製剤 Download PDFInfo
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Description
以下、実施例を挙げて上述の実施形態を説明するが、本発明及び上述の実施形態は、下記の各実施例の記載内容に限定されるものではない。
ICRマウス(10週齢、オス)を温度23±1℃、湿度55±5%、明暗サイクル(明期8〜20時、暗期20〜8時)で標準量の飼料と水を与え、1週間馴化させ、その後飼育開始とした。上記ICRマウスに、5−フルオロウラシル(以下、「5−FU」という)を8mg/mLの5−FUを生理食塩水に溶解したものを、ICRマウスに対して50mg/kgになるように、飼育開始から0、2日目、及び4日目に6.25mL/kgを腹腔内投与した。
口内炎の評価として、潰瘍面積を測定した。具体的には、マウスをイソフルランで麻酔した後、上述と同様の方法により固定し、潰瘍部位の長径および短径を測定し、潰瘍面積の概算で算出した。
26Gの注射針を用いて、マウスの尾静脈に傷をつけた。出てきた血液を、ピペットを用いて2μLを採取した。採取したこのマウスの血液2μLを、チュルク染色液を38μL入れたチューブ(1.5mL)に加えた。ボルテックスした後、10μLの液を血球計算盤に採り、顕微鏡下で白血球数をカウントした。カウントした白血球数から、マウスの血液中の白血球数を算出した。
本実施例において、作用効果の比較には、ダネット検定を用いた。データは、平均値±SD(標準偏差)で表し、有意水準5%未満を有意差ありと判定した。
(口内炎治療モデルとしての適性評価)
酢酸注射日(飼育開始から5日目)の翌日(同6日目)から、口内炎治療剤であるトリアムシノロンアセトニド(以下、「TA」という)製剤を、上述の口内炎モデルマウス3匹に対して、1日1回、約5mg連日投与した。また、比較例として、乳糖を投与した乳糖投与群と、コントロールとして何も投与しない無治療群とを用いた。それらの結果を図1に示す。なお、図1において、「*」印は無処理群に対して有意水準5%未満であることを意味する。
(ナールスゲンによる口内炎治療効果の評価)
ナールスゲンを精製水に溶解して、それぞれ6.8mg/mL及び13.6mg/mLの濃度の水溶液を作製した。上述の方法により得られた口内炎モデルマウスをイソフルランを用いて麻酔した後、仰向けにして口を開けた状態で固定した。P100ピペットを用いて、上述の各濃度のナールスゲン水溶液25μLずつ(0.5μmol、1.0μmol)を口内炎部位に塗布投与した。
(ナールスゲンとレバミピドの併用による口内炎治療効果の評価)
胃炎や胃潰瘍を治療するための薬剤であるレバミピドと、ナールスゲンとを併用して口内炎治療効果を評価した。具体的には、酢酸注射日(飼育開始から5日目)の翌日(同6日目)から、レバミピドを2.0μmol、ナールスゲンを1.0μmol、ナールスゲン1.0μmolとレバミピドとを2.0μmolを、それぞれ上述の口内炎モデルマウス各4匹に、1日1回連日塗布投与した。比較例として、コントロールとして何も投与しない無治療群とを用いた。実施例1と同様に、潰瘍面積の経時変化と白血球の経時変化とを測定した。結果を図5及び図6に示す。図5及び図6においては、「*」印は無処理群に対して有意水準5%未満であることを意味する。
(1.0μmolを超えるナールスゲンを投与した例)
上述の実施例2に示す方法と同様に、ナールスゲンの量が5.0μmolとなるナールスゲン水溶液を25μLずつ投与した結果、潰瘍面積の経時変化を調べると、1.0μmolの投与の場合と同様に、ナールスゲンを投与してから6日目から、顕著に治療効果が見られた。特筆すべきは、1.0μmolの投与の場合よりも早期に、該潰瘍に対する高い治療効果が発揮されている点である。同様に、ナールスゲンを投与してから8日目及びナールスゲンを投与してから11日目についても、1.0μmolの投与の場合よりも該潰瘍に対する高い治療効果が発揮されていることが確認された。その後は、十分に潰瘍面積が低減されたため、5.0μmolの場合と1.0μmolの場合との差が殆どなくなった。上述のとおり、より多くの量のナールスゲンを投与することが早期の治療に貢献し得ることが確認された。
Claims (2)
- 下記の化学式1で表される化合物を含有する口腔粘膜疾患の予防または治療用経口製剤。
- さらに潰瘍治療剤を含む、
請求項1に記載の口腔粘膜疾患の予防または治療用経口製剤。
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