JP4740532B2 - 骨形成促進及び骨吸収抑制剤 - Google Patents
骨形成促進及び骨吸収抑制剤 Download PDFInfo
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- JP4740532B2 JP4740532B2 JP2003340804A JP2003340804A JP4740532B2 JP 4740532 B2 JP4740532 B2 JP 4740532B2 JP 2003340804 A JP2003340804 A JP 2003340804A JP 2003340804 A JP2003340804 A JP 2003340804A JP 4740532 B2 JP4740532 B2 JP 4740532B2
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- bone
- bone resorption
- prothrombin
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- transferrin
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Description
軽い運動はジョギングや散歩等が良いとされるが、体が弱っている場合は軽い運動も厄介なものであり、まして寝たきりの老人では殆ど運動できない。日光浴は活性型ビタミンD3の補給という点では良いとされているが、これだけでは不充分である。薬物投与には、1α−ヒドロキシビタミンD3やカルシトニン製剤等が使用されており、骨粗鬆症の治療には有効であるということが知られている。しかし、これらの物質は医薬そのものであり、食品素材としても使用可能なものではない。
プロトロンビンは、分子量約7.2kDaのタンパク質であり、血液凝固II因子とも呼ばれる。ビタミンK依存性血液凝固因子の1つであり、ビタミンK存在下で第X因子によりトロンビンに分解される。生じたトロンビンはフィブリノーゲンをフィブリンへと分解し、フィブリンが架橋することによって血液が凝固する。プロトロンビンは、血液を始め、全身組織中に広く分布していることが知られており、ヒトやウシでは乳中にも存在していることが報告されている。
プロトロンビンやトロンビンの骨強化及び骨吸収抑制等の骨への作用についてはこれまで報告されていない。
すなわち、本発明は、プロトロンビン、チトクロームP-450、プラスミノーゲン、トランスフェリン、トロンビン及びプラスミンのいずれか1種以上を有効成分とする骨形成促進及び骨吸収抑制剤に関する。
また、本発明は、プロトロンビン、チトクロームP-450、プラスミノーゲン、トランスフェリン、トロンビン及びプラスミンのいずれか1種以上を配合した骨形成促進及び骨吸収抑制用医薬に関する。
血液からの調製については、クエン酸血漿をクエン酸バリウムと反応させ、不溶性バリウムに吸着したプロトロンビン、チトクロームP-450、プラスミノーゲン、及びトランスフェリンの沈殿をそれぞれ回収する。さらにイオン交換クロマトグラフィーにより純度を高めることができる。
なお、チトクロームP-450、プラスミノーゲン、及びトランスフェリンについても上記プロトロンビンと同様の方法によりウシ血漿より調製することが可能である。
マウス骨芽細胞MC3T3-E1細胞を10%牛胎児血清を含むα−MEM培地(Flow Laboratories社製) で、2×104/mlの細胞数で96穴プレートに播種し、5% CO2存在下、37℃で24時間培養し、試験用培養細胞とした。そして、培地を牛胎児血清を含まないα−MEM培地に交換し、プロトロンビン、チトクロームP-450、プラスミノーゲン、トランスフェリン、プラスミン及びトロンビンを表1記載のそれぞれの最終濃度となるよう培地に添加して、37℃で18時間培養した。これにブロモデオキシウリジン(BrdU)を用いたセルプロロフィレーションアッセイキット(アマシャムバイオサイエンス社製)で細胞増殖活性を調べた。対照として、有効成分無添加のものを用い、有効成分無添加のものの細胞増殖活性を 100%としたときのそれぞれの細胞増殖活性 (%) で表した。その結果を表1に示す。
生後10〜20日齢のICR系マウスの長管骨を摘出し、軟組織を除去した後、5%牛胎児血清を含むα−MEM(Flow Laboratories社製)溶液中で骨を機械的に細切し、破骨細胞を含む全骨髄細胞を得た。この破骨細胞を含む全骨髄細胞を約2×106 細胞になるように象牙片の上に撒き込み、5%牛胎児血清を含むα−MEM溶液でスポットした。2時間後、プロトロンビン、チトクロームP-450、プラスミノーゲン、トランスフェリン、プラスミン及びトロンビンを、表2記載のそれぞれの最終濃度となるように、5%牛胎児血清を含むα−MEM溶液を加え、5日間培養し、既存の破骨細胞の骨吸収抑制活性を調べた。
骨吸収抑制作用の評価は、培養後、象牙片上の細胞を剥がしてヘマトキシリン染色し、PIASLA-555により画像解析して骨吸収窩(ピット) の数を測定した。(瀬野悍二ら,研究テーマ別動物培養細胞マニュアル,pp.199-200, 1993)。すなわち、ピット数が少ないということは、破骨細胞の活性が低下して骨吸収活性が抑制されたことを意味している。また、ピットアッセイで骨吸収抑制効果が示された物質は、動物実験でも骨吸収の抑制効果が示されており(Tobaら、Bone, vol.27, p.403-408, 2000)、一般的にピットアッセイは骨吸収抑制効果を調べる上で適した実験系である。対照として、有効成分無添加のものを用い、有効成分無添加のものの骨吸収活性を100%としたときのそれぞれの骨吸収活性 (%) で表した。その結果を表2に示す。
Claims (3)
- プロトロンビン及び/又はトロンビンを有効成分とする骨形成促進及び骨吸収抑制剤。
- 1日当たり1ng〜100mg投与することを特徴とする請求項1に記載の骨形成促進及び骨吸収抑制剤。
- 請求項1又は2に記載の骨形成促進及び骨吸収抑制剤を配合した骨形成促進及び骨吸収抑制用医薬。
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JP2003340804A JP4740532B2 (ja) | 2003-09-30 | 2003-09-30 | 骨形成促進及び骨吸収抑制剤 |
NZ545953A NZ545953A (en) | 2003-09-30 | 2004-09-30 | Agent for promoting osteogenesis and/or inhibiting bone resorption |
PCT/JP2004/014761 WO2005030244A1 (ja) | 2003-09-30 | 2004-09-30 | 骨形成促進及び/又は骨吸収抑制剤 |
AU2004275649A AU2004275649A1 (en) | 2003-09-30 | 2004-09-30 | Agent for promoting osteogenesis and/or inhibiting bone resorption |
US10/573,776 US20060286084A1 (en) | 2003-09-30 | 2004-09-30 | Agent for promoting osteogenesis and/or inhibiting bone resorption |
NZ584473A NZ584473A (en) | 2003-09-30 | 2004-09-30 | Agent for promoting osteogenesis and/or inhibiting bone resorption |
EP04773639A EP1669084A4 (en) | 2003-09-30 | 2004-09-30 | MEANS FOR PROMOTING OSTEOGENESIS AND / OR FOR INHIBITING BONE RESORPTION |
CA002539445A CA2539445A1 (en) | 2003-09-30 | 2004-09-30 | Agent for promoting osteogenesis and/or inhibiting bone resorption |
KR1020067005999A KR101170852B1 (ko) | 2003-09-30 | 2004-09-30 | 골 형성 촉진 및/또는 골 흡수 억제제 |
US12/102,552 US20080206226A1 (en) | 2003-09-30 | 2008-04-14 | Agent for promoting osteogenesis and/or inhibiting bone resorption |
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