JP6032561B2 - 疼痛における中枢機能改善薬 - Google Patents
疼痛における中枢機能改善薬 Download PDFInfo
- Publication number
- JP6032561B2 JP6032561B2 JP2013502409A JP2013502409A JP6032561B2 JP 6032561 B2 JP6032561 B2 JP 6032561B2 JP 2013502409 A JP2013502409 A JP 2013502409A JP 2013502409 A JP2013502409 A JP 2013502409A JP 6032561 B2 JP6032561 B2 JP 6032561B2
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- Prior art keywords
- dose
- pain
- analgesic
- body weight
- tipepidine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
本実施例は、チペピジンの鎮痛作用効果の発現しない用量とモルヒネの鎮痛作用効果の発現しない用量で併用した時の鎮痛作用効果の発現を示す実験である。この実験は、一般的な鎮痛活性評価法である、「酢酸ライジング試験」方法を用いて行った。この方法は、酢酸を投与した際に現れる、マウスのライジング反応(腹が垂れ、身体をよじる反応)の回数を一定時間内でカウントする方法である。この試験は、ある化合物を投与し、その回数が減少した時、鎮痛活性ありと判定する。ddY系 雄性マウス(26-45 g)(九動株式会社)に、塩酸モルヒネ (0.05-0.3 mg/kg)(大日本住友製薬)を皮下投与し、その10分後にクエン酸チペピジン(2.5 mg/kg) (田辺三菱製薬)を腹腔内投与した。そして、その20分後に酢酸(1%)(WAKO)腹腔内投与し、その5分後からライジング回数を10分間測定した。測定は、主観的要素を排除するために、実験者と測定者は別の者で行った。塩酸モルヒネおよびクエン酸チペピジンは、生理食塩水(0.9 %)で溶解し、酢酸は、超純水にて溶解した。塩酸モルヒネは5 ml/kg、クエン酸チペピジンおよび酢酸は、10 ml/kgの容量で投与した。その結果、塩酸モルヒネ (0.1 および0.3 mg/kg)とクエン酸チペピジン (2.5 mg/kg)の併用によって、有意なライジング回数の減少を示した(図1)。
本実験例は、チペピジン単独投与による鎮痛効果を示す比較例である。
ddY系 雄性マウス(26-45 g)(九動株式会社)に、クエン酸チペピジン(2.5 -40 mg/kg)(田辺三菱製薬)を腹腔内投与した。そして、その20分後に酢酸(1%)(WAKO]を腹腔内投与し、その5分後からライジング回数を10分間測定した。測定は、主観的要素を排除するために、実験者と測定者は別の者で行った。クエン酸チペピジンは、生理食塩水(0.9 %)で溶解した。酢酸は、超純水にて溶解した。クエン酸チペピジンおよび酢酸は、10 ml/kgの容量で投与した。クエン酸チペピジン (5 -40 mg/kg)によって有意なライジング回数の減少を示した。しかし、2.5 mg/kgでは、有意な減少を示さなかった(図2)。
本実験例は、モルヒネ単独投与による鎮痛効果を示す比較例である。
ddY系 雄性マウス(26-45 g)(九動株式会社)に、塩酸モルヒネ (0.05-0.3 mg/kg)(大日本住友製薬)を皮下投与した。そして、その30分後に酢酸(1%)(WAKO]を腹腔内投与し、その5分後からライジング回数を10分間測定した。測定は、主観的要素を排除するために、実験者と測定者は別の者で行った。塩酸モルヒネは、生理食塩水(0.9 %)で溶解し、酢酸は、超純水にて溶解した。塩酸モルヒネは5 ml/kgの容量で投与した。その結果、塩酸モルヒネ(0.3 mg/kg)によって有意なライジング回数の減少を示した。しかし、0.05および0.1 mg/kgでは、有意な減少を示さなかった(図3)。
本実施例では、GIRKチャネルに影響を与えるとされているエタノールを用いて、エタノール/モルヒネとの併用投与した場合の併用効果を調べた。
Claims (2)
- チペピジンと麻薬性鎮痛薬としてのモルヒネとからなる疼痛における中枢機能改善薬であって、チペピジンの用量がそれ単独では疼痛に対する鎮痛作用効果を発現しない2.5mg/kg体重〜40mg/kg体重、好ましくは5mg/kg体重〜40mg/kg体重である第1用量であり、また麻薬性鎮痛薬の用量がそれ単独では疼痛に対する鎮痛作用効果を発現しない0.05mg/kg体重〜0.3mg/kg体重、好ましくは0.1mg/kg体重〜0.3mg/kg体重である第2用量であるが、第1用量と第2用量とを合わせると疼痛に対する鎮痛作用効果を発現可能な第3用量からなることを特徴とする疼痛における中枢機能改善薬。
- 請求項1に記載の中枢機能改善薬であって、チペピジンが、ヒベンズ酸チペピジン、クエン酸チペピジンから選ばれる少なくとも1種の化合物であることを特徴とする中枢機能改善薬。
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US20220211695A1 (en) * | 2019-05-23 | 2022-07-07 | Georgia State University Research Foundation, Inc. | Morphine-induced respiratory depression: behavioral, phrenic and brainstem respiratory neuronal evidence |
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