JP5950380B2 - リン酸化ペプチドならびに硬組織および/または異所性石灰化抑制剤 - Google Patents
リン酸化ペプチドならびに硬組織および/または異所性石灰化抑制剤 Download PDFInfo
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- JP5950380B2 JP5950380B2 JP2011150487A JP2011150487A JP5950380B2 JP 5950380 B2 JP5950380 B2 JP 5950380B2 JP 2011150487 A JP2011150487 A JP 2011150487A JP 2011150487 A JP2011150487 A JP 2011150487A JP 5950380 B2 JP5950380 B2 JP 5950380B2
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
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- A61P19/00—Drugs for skeletal disorders
- A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
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Description
(a)配列番号1ないし3のいずれかに記載のアミノ酸配列。
(b)配列番号1ないし3のいずれかに記載のアミノ酸配列に対して、80%以上の相同性を有するアミノ酸配列。
(c)配列番号1ないし3のいずれかに記載のアミノ酸配列において、1または数個のアミノ酸が欠失、置換、付加もしくは挿入またはこれらの組み合わせにより配列に変異が生じているアミノ酸配列。
本発明の実施の形態1は、MEPEに由来するASARMペプチドの全部または一部のアミノ酸配列を含有し、当該アミノ酸配列における少なくとも二つ以上のアミノ酸残基がリン酸化されたセリンであり、かつ硬組織石灰化および/または異所性石灰化を抑制する作用を有するリン酸化ペプチドに関する。本実施の形態1に係るリン酸化ペプチドにおいて、好ましくは、当該アミノ酸配列はヒトにおけるPHEX切断部位からN末端側の3アミノ酸残基を含む。なお、好ましくは、当該リン酸化されたセリンは三つまたはそれ以上である。また、より好ましくは、当該リン酸化ペプチドは少なくとも12アミノ酸残基を有する。
本発明の実施の形態2は、前述の実施の形態1に係るリン酸化ペプチドを有効成分として含む硬組織石灰化および/または異所性石灰化抑制剤に関する。有効成分として含まれるリン酸化ペプチドの詳細については、前述の実施の形態1と同様である。
本発明の実施の形態3は、前述の実施の形態1に係るリン酸化ペプチドの活性中心(石灰化抑制活性部位)を認識する抗体に関する。すなわち、本実施の形態3に係る抗体は、石灰化抑制活性を中和する中和抗体である。なお、前述の通り、活性中心とは少なくとも二つ以上のリン酸化セリンである。当該少なくとも二つ以上のリン酸化セリンの詳細については、前述の実施の形態1と同様である。
本発明の実施の形態4は、前述の実施の形態3に係る抗体を有効成分として含む硬組織石灰化および/または異所性石灰化促進剤に関する。有効成分として含まれる抗体の詳細については、前述の実施の形態3と同様である。
本実施例1では、培養成熟骨芽細胞/骨細胞(以下、Obc細胞)におけるASARMペプチドおよびp−ASARMペプチドの基質石灰化抑制作用に係る実施例について詳細に説明する。
本実施例2では、ラット血管平滑筋細胞におけるASARM19ペプチドおよびp−ASARM19ペプチドの石灰化抑制作用(カルシウム量測定)に係る実施例について詳細に説明する。
本実施例3では、抗体作製、精製および抗体吸収試験に係る実施例について詳細に説明する。
本実施例4では、抗p−ASARM19ペプチド抗体を用いたin vivoにおける主要な骨組織の部位別(大腿骨骨端の皮膚骨および海綿骨ならびに頭蓋骨)の免疫染色に係る実施例について詳細に説明する。
本実施例5では、抗p−ASARM19ペプチド抗体を用いた血管のアリザリンレッド/トルイジンブルー染色および免疫染色に係る実施例について詳細に説明する。
本実施例6では、培養骨形成モデルでの抗p−ASARM19ペプチド抗体の中和活性のALP/von Kossa染色における測定に係る実施例について詳細に説明する。
Claims (2)
- MEPEに由来するASARMペプチドの一部のアミノ酸配列を含有し、かつ硬組織石灰化および/または異所性石灰化を抑制する作用を有する、以下の(i)〜(v)のいずれかであることを特徴とする、リン酸化ペプチド:
(i)配列番号9のアミノ酸配列で表され、N末端側から数えて9番目と11番目のセリンがリン酸化されている、二つのセリン残基がリン酸化されたリン酸化ペプチド、
(ii)配列番号9のアミノ酸配列で表され、N末端側から数えて7番目と9番目と11番目のセリンがリン酸化されている、三つのセリン残基がリン酸化されたリン酸化ペプチド、
(iii)配列番号5のアミノ酸配列で表され、N末端側から数えて12番目と14番目のセリンがリン酸化されている、二つのセリン残基がリン酸化されたリン酸化ペプチド、
(iv)配列番号5のアミノ酸配列で表され、N末端側から数えて10番目と12番目と14番目のセリンがリン酸化されている、三つのセリン残基がリン酸化されたリン酸化ペプチド、または、
(v)配列番号7のアミノ酸配列で表され、N末端側から数えて14番目と16番目のセリンがリン酸化されている、二つのセリン残基がリン酸化されたリン酸化ペプチド。 - 請求項1に記載のリン酸化ペプチドを有効成分として含むことを特徴とする、硬組織および/または異所性石灰化抑制剤。
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PCT/JP2012/067351 WO2013005839A1 (ja) | 2011-07-06 | 2012-07-06 | リン酸化ペプチド、硬組織および/または異所性石灰化抑制剤、抗体ならびに硬組織および/または異所性石灰化促進剤 |
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