JP6448990B2 - 薬物依存症の治療薬としてのTrkB受容体拮抗薬 - Google Patents
薬物依存症の治療薬としてのTrkB受容体拮抗薬 Download PDFInfo
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Description
これら依存性薬物の繰り返し投与により生じる薬物依存や精神症状の治療薬としては、現在、精神科領域で使用されている抗精神病薬、抗うつ薬などが使用されるが、一部の症状を抑えるだけであり、根本的に治療できる薬剤は無い。この要因として、これらの依存性薬物の繰り返し投与による脳内の可塑的変化が、断薬後も長期間にわたり持続するためと考えられている(非特許文献1-4)。しかしながら、現在のところ、薬物依存症に有効な治療法は確立されていない。
本発明は以上の知見に基づいてなされたものである。
1)TrkB(tropomyocin-related kinase B、脳由来神経栄養因子受容体)を阻害する化合物またはその薬理学的に許容される塩を含有する、薬物依存症の予防剤および/または治療剤に関する。
2)また、TrkB受容体拮抗作用(TrkBアンタゴニスト作用)を有する化合物を含有する、薬物依存症の予防剤および/または治療剤に関する。
3)さらに、TrkBを阻害する化合物および/またはTrkB受容体拮抗作用(TrkBアンタゴニスト作用)を有する化合物が、ANA−12( N2- (2-{[(2-oxoazepan-3-yl) amino]carbonyl}phenyl)benzo[b]thiophene-2-carboxamide)、AZD6918(5-fluoro-2-[[(1S)-1-(5-fluoro-2-pyridyl)ethyl]amino]-6-[(5-isopropoxy-1H-pyrazol-3-yl)amino]pyridine-3-carbonitrile)、およびCEP701(Lestaurtinib、(9S,10S,12R)-2,3,9,10,11,12-Hexahydro-10-hydroxy-10-(hydroxymethyl)-9-methyl-9,12-epoxy-1H-diindolo[1,2,3-fg:3',2',1'-kl]pyrrolo[3,4-i][1,6]benzodiazocin-1-one)からなる群から選ばれる1つまたは1つ以上の化合物である、上記1)または2)に記載の薬物依存症の予防剤および/または治療剤に関する
4)また、TrkB受容体拮抗作用(TrkBアンタゴニスト作用)を有する化合物の薬物依存症の治療のための使用に関する。
5)さらに、ANA−12( N2- (2-{[(2-oxoazepan-3-yl) amino] carbonyl} phenyl) benzo [b] thiophene-2-carboxamide)のメタンフェタミンの薬物依存症の治療のための使用に関する。
本発明の薬物依存症の治療のために用いる化合物は、BDNFの作用を抑制する化合物、およびTrkB受容体を拮抗する化合物であればよい。
「薬物依存治療薬」とは、薬物依存形成を抑制するために使用される薬剤、または形成された薬物依存の症状を改善(部分的又は完全な治癒を含む)するために使用される薬剤のことをいう。したがって本発明の薬物依存治療薬には、薬物依存症の治療に使用可能な薬剤が含まれる。原因となる薬物によっても異なるが、薬物依存症は薬物の精神的な作用(効果)に依存する精神依存、退薬に伴う生体反応を避けるための身体依存、または耐性の獲得(或いはこれらの組み合わせ)を特徴とする。薬物依存症の原因となる薬物としては、覚せい剤(メタンフェタミン、アンフェタミン)、合成麻薬MDMA、モルヒネ、コカイン、ニコチン、アルコール、フェンザイクリジン、ケタミン、ベンゾジアゼピン類、大麻、危険ドラッグ等(各種の塩を含む)を例示できるが、本発明が対象とする薬物依存症はこれらの薬物に関連するものに限られない。
本発明を構成するTrkB受容体拮抗薬(TrkBアゴニスト)は、薬物依存症による様々な症状を改善する。したがってこれらのTrkB受容体拮抗薬を有効成分として含有する本発明の薬剤は、薬物依存症の治療用として好適である。また、本発明を構成するTrkB受容体拮抗薬は、低分子化合物であり、医薬品としての調製が容易であるという利点を有する。
物モデルはヒトにおける覚せい剤精神病の動物モデルとして有用である。
である。最終投与から3日後に、全てのマウスに低用量のメタンフェタミン(1mg/kg)を皮下投与し、SCANETで運動量を測定した。結果の統計解析は、繰り返しの一元配置分散分析(repeated one−way ANOVA)およびそれに続いて最小有意差検定(LSD test)を行うことにより実施した。データは、平均±標準誤差(n=7−9マウス/群)で表す。*p<0.05、***p<0.001はControl群と比較した有意差を示す。##p<0.05、###p<0.001はMETH群と比較した有意差を示す。
Claims (2)
- ANA−12( N2-(2-{[(2-oxoazepan-3-yl) amino] carbonyl} phenyl) benzo [b]thiophene-2-carboxamide)を含有するメタンフェタミンの薬物依存症の予防剤および/または治療剤。
- ANA−12(N2- (2-{[(2-oxoazepan-3-yl) amino] carbonyl} phenyl) benzo [b]thiophene-2-carboxamide)を含有するメタンフェタミンの薬物依存症の治療剤。
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