JP6161183B1 - 記憶改善用ペプチド - Google Patents
記憶改善用ペプチド Download PDFInfo
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- JP6161183B1 JP6161183B1 JP2017024946A JP2017024946A JP6161183B1 JP 6161183 B1 JP6161183 B1 JP 6161183B1 JP 2017024946 A JP2017024946 A JP 2017024946A JP 2017024946 A JP2017024946 A JP 2017024946A JP 6161183 B1 JP6161183 B1 JP 6161183B1
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Abstract
Description
[1]配列番号1のアミノ酸配列からなるペプチド。
[2]上記[1]に記載のペプチドをコードする核酸。
[3]上記[1]に記載のペプチドを含む、記憶障害改善用医薬組成物。
[4]配列番号1のアミノ酸配列からなるペプチドを含む医薬組成物を、それを必要とする対象に投与することを含む、記憶障害改善方法。
[5]記憶障害改善方法のための、配列番号1のアミノ酸配列からなるペプチド。
[6]記憶障害改善用医薬組成物を製造するための、配列番号1のアミノ酸配列からなるペプチドの使用。
アルツハイマー病モデルマウス:アルツハイマー病の動物モデルであるトランスジェニックマウス(5XFAD)は、ジャクソン研究所(バーハーバー(Bar Harbor)、メイン州、米国)から入手した。5XFADマウスは、ニューロン特異的マウスThy−1プロモータの転写制御下、スウェーデン(Swedish)(K670NとM671L)、フロリダ(Florida)(I716V)及びロンドン(London)(V717I)に変異を持つヒトAPP695 cDNA、及びヒトPS1 cDNA(M146LとL286Vの変異)を過剰発現している(Oakley,H.ら,J Neurosci,26,10129-10140,2006.)。それらはB6/SJL F1ブリーダーとヘミ接合トランスジェニックマウスを交配することによって維持された。
本実施例で用いたペプチドを表1に示す。ペプチドは、培養神経細胞実験の場合は滅菌精製水に、マウス脳室内投与実験の場合は人工脳脊髄液(artificial cerebrospinal fluid(ACSF):130mM NaCl,24mM NaHCO3,3.5mM KCl,1.3mM NaH2PO4,2mM CaCl2,2mM MgCl2・6H2O and 10mM glucose at pH7.4)に溶解した。
本実施例において、得られた結果は以下の統計処理を行った:
一元配置分散分析(one−way ANOVA)、事後ダネット(Dunnett)検定、非対応t−検定及び対応t−検定は、グラフパッド5(Graphpad Prism 6) (グラフパッドソフトウエア(Graphpad Software)社、ラホヤ(La Jolla)、カリフォルニア州、米国)を用いて行った。*P<0.05、**P<0.01、#P< 0.05は統計学的に有意とし、平均値は標準誤差とともに示す。
マウス大脳皮質神経細胞は胎生14日齢のddYマウス(Japan SLC, 静岡)から取り出した胎児をPBSで洗浄後、断頭し、初代培養用に作成した培地[Neurobasal media(ライフテクノロジーズ,Carlsbad,CA,USA)中に12%馬血清(ライフテクノロジーズ),2mM L−グルタミン酸,0.6%グルコースを溶解]に入れた。培地中で、実体顕微鏡(SZ−61,Olympus,東京)下で大脳皮質のみを単離した。
前シナプス密度定量実験の際は、細胞の培養開始5時間後及び3日後に培地を全量、馬血清の代わりにB−27 supplement(Invitrogen)を含む新しい培地で交換した。その後1週間に1度程度の頻度で培地交換を繰り返した。培養開始から21日後の培地交換の際、事前に凝集させておいたアミロイドベータ部分配列(Aβ25−35)を10μMになるように加えた。その3日後に培地を全量新しいものに換える際にペプチドあるいは溶媒を加え、さらに4日後に免疫染色を実施した。
GPPGPAGを人工脳脊髄液に溶解して、浸透圧ミニポンプ1004タイプ(ALZET Osmotic Pumps、Cupertino、米国)を用いて、5XFADマウスの右側脳室に刺入固定し、側脳室内に28日間持続的に注入した。投与量はGPPGPAGが脳脊髄液中で常に10nMになるように設定した。具体的には、ポンプからのペプチドの流量0.11μl/hと、マウスにおける脳脊髄液生成量18μl/hから計算し、マウス脳脊髄液中のペプチド濃度が、(細胞実験での有効濃度であった)10nMになっているようにペプチド液濃度を調製してポンプに入れた。比較群として、5XFADマウスの右側脳室に同様に浸透圧ミニポンプを刺入固定し、人工脳脊髄液のみを持続的に投与した5XFADマウス群(溶媒投与群)も設けた。これらのマウス群に対し、物体認知記憶試験を実施した。
Claims (3)
- 配列番号1のアミノ酸配列からなるペプチド。
- 請求項1に記載のペプチドをコードする核酸。
- 請求項1に記載のペプチドを含む、記憶障害改善用医薬組成物。
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