JP5607543B2 - 治療に必要な軽度認知障害患者の特定方法とかかる患者の治療剤 - Google Patents
治療に必要な軽度認知障害患者の特定方法とかかる患者の治療剤 Download PDFInfo
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- JP5607543B2 JP5607543B2 JP2010544704A JP2010544704A JP5607543B2 JP 5607543 B2 JP5607543 B2 JP 5607543B2 JP 2010544704 A JP2010544704 A JP 2010544704A JP 2010544704 A JP2010544704 A JP 2010544704A JP 5607543 B2 JP5607543 B2 JP 5607543B2
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Description
・軽度認知障害と診断された患者の血流からの生体流体の試料で、少なくとも1つの血流関連ペプチドバイオマーカーを測定する、及び
・臨床的に明らかな神経変性疾患を発症するリスクの上昇を、このバイオマーカーの通常の濃度値範囲で設定されるバイオマーカー特異的閾値(カットオフ)を超える少なくとも1つの血流関連ペプチドバイオマーカーの濃度に割り当てる。
本発明のインビトロ法では、試料は好ましくは血清又は血漿試料である。
好ましくは血流関連ペプチドバイオマーカーは、ナトリウム利尿ペプチドANP及び/又はBNP及び/又はアドレノメデュリン(ADM)、又はこれらの関連プロホルモンのフラグメントであるプロ−ANP、プロ−BNP、もしくはプロ−ADMから選択される。
1)外観:白色の粉末
2)融点:175〜185℃
3)分子式:C234H392O152
4)質量スペクトル(ネガティブFAB質量スペクトル):
測定値:M/Z 5536.5(M-H)-
理論値:M/Z 5637.3
5)比旋光度:[α]24 D=−29.4°(c0.24、水溶液)
6)赤外線吸収スペクトル(KBr錠剤法):
cm-1:3420, 2930, 1730, 1635, 1455, 1380, 1250, 1170, 1045
7)紫外線吸収スペクトル(水溶液):末端の吸収がわずかに見えるのみ
8)1H-NMRスペクトル(500MHz、D2O中):
US5,132,112の図1に示される
9)色反応:
アニスアルデヒド、硫酸、及びヨウ素と陽性反応。
ニンヒドリン、ジニトロフェニルヒドラジン、塩化鉄、ブロモクレゾールグリーン、及びDragendorff試薬と陰性反応。
上記発明の特に好適な実施態様において、アデノシン受容体アンタゴニストは1,3−ジプロピル−8−(3−ノルアダマンチル)キサンチンである。
従って好適な実施態様において活性物質はANP受容体アンタゴニストであり、ANP受容体の少なくとも50%、好ましくは70%、最も好ましくは80%(しかし95%以下)がアンタゴニストにより占有される時の用量で投与される。
・競合的受容体アッセイを行ってアンタゴニスト候補を同定する、
・ANP誘導性cGMP生成を阻止するアンタゴニスト候補の能力を試験する、
・心房性ナトリウム利尿ペプチドについて受容体のアンタゴニストを同定する、
を含んでなる、心房性ナトリウム利尿ペプチドの受容体のアンタゴニストを同定するためのスクリーニング法である。
3.室温で90分インキュベーション。
4.遠心分離(30分、4℃、2000g)して、受容体と上清とを分離。
6.IC50値は、添加したアンタゴニストの濃度の関数として、受容体結合放射能標識ANPペプチドの濃度から決定される。
1.100〜100,000細胞/分析の細胞数で、天然の又は組換えANP受容体を有する動物もしくはヒト組織(好ましくは腎細胞調製物)又は適切な細胞株からの膜結合ANP受容体(グアニレートシクラーゼ)の供給。50mM PBS、0.2% BSA、pH7.2、中。
2.1fM〜100nMの(候補)アンタゴニストと5〜100,000pM ANP1-28(ヒト)の添加。
3.37℃で30分インキュベーション。
4.競合的イムノアッセイで、溶解緩衝液中のcGMP-d2と抗cGMPクリプターゼ(溶解緩衝液中の抗cGMP抗体)を加えることによる、生成するcGMP濃度の測定。cGMP濃度は、665/620nmでの蛍光強度の比に比例する。生成するcGMPが関連アンタゴニスト濃度に依存することから、IC50値が決定される。
これらのうちで、アルツハイマー認知症(アルツハイマー病)が最も一般的な神経変性認知症疾患である。これはすべての認知症症例の2/3を構成し、実際本発明の最も重要な適用領域である。ADは3つの重要な特徴があるが、これらが確実に決定できるのは死後である:アミロイド班と神経繊維束の形成、ならびに神経細胞の喪失(上記の以前の出願の説明への紹介を参照)。
好ましくはANP受容体アンタゴニストは、グルコース−カプロン酸ポリマーである。
好ましくはアデノシン受容体アンタゴニストは、1,3−ジプロピル−8−(3−ノルアダマンチル)キサンチン(「ロロフィリン」)である。
10個の図(略図)、以下に詳述する内容を参照されたい。
患者集団:
軽度認知障害(MCD又はMCI)と診断された平均年齢71.5才の131人の患者(n=131)から、最初の診断時(t=0)にEDTA血液試料を得て、そこから、バイオマーカー測定の試験材料としてEDTA血漿試料を調製した。
図1は、臨床診断のみに基づくカプラン・マイヤープロット型の全患者集団の知見を示す。
診断時に得たEDTA血漿試料で、ペプチドバイオマーカーMR−プロANPとMR−プロADMの濃度を本出願人のアッセイを使用して測定した。
血漿中のMR−プロADMの測定は基本的に、上記WO2004/090546号の実験欄に記載された免疫発光サンドイッチアッセイを用いて行った。
MR−プロANP=62.3pmol/l
MR−プロADM=0.60nmol/l。
診断時に得られた131人のMCD患者の血漿で測定されたペプチドバイオマーカーの濃度を、それぞれ図2(MR−プロADMについて)と図3(MR−プロANPについて)に、以後のADへの転換者、他の型の認知症(血管性認知症)への転換者、及び非転換者について別々に示す。
以下の表3に要約するように、以後の転換者について測定した両方のバイオマーカーの濃度の中央値は、顕著に上昇している。
測定されたバイオマーカーADMとANP(血流へのその放出が、それぞれMR−プロANPとMR−プロADMフラグメントにより間接的に決定された)は、心不全のバイオマーカーとして知られている。従って心不全のバイオマーカーの上昇と神経変性疾患の発症(さらに詳しくはアルツハイマー認知症の発症)の間には強い相関がある。しかしこの相関は、関連するマーカーについて決定された「正常濃度」の分布内の驚くべき低レベルのバイオマーカー濃度で証明されている。従って観察されたマーカーのわずかな上昇が、関係している可能性がある。ここから振り返ると、後に神経変性(さらに詳しくはAD型の)を示す患者は、ほんのわずかであるが連続的な血流効率の悪化が観察されると結論された。
Claims (10)
- アルツハイマー病を発症するリスクが高い治療が必要な軽度認知障害を有する患者を特定するためのインビトロ法であって、
− 軽度認知障害と診断された患者の血液試料で、MR-プロANP又はMR-プロADPであるバイオマーカーを測定し、及び
− アルツハイマー病を発症するリスクの上昇を、前記バイオマーカーの通常の濃度値範囲で設定されるバイオマーカー特異的閾値(カットオフ)を超える前記バイオマーカーの濃度に割り当てる、
ことを含んでなる方法。 - アルツハイマー病の発症を遅延させるかもしくは予防するため、又は軽度認知障害の状態を改善もしくは維持するために、請求項1に記載の方法により特定されたアルツハイマー病の発症の高いリスクが確定している軽度認知障害患者に投与するための、ANP受容体アンタゴニスト、アデノシン受容体アンタゴニスト、ACEインヒビター、アンギオテンシンII受容体アンタゴニスト、ベータ遮断薬、抗高血圧利尿薬、及びこれらの組合せを含む群から選択される心血管薬の1つ又はそれ以上の活性物質を含んでなる医薬組成物。
- 前記ANP受容体アンタゴニストがグルコース−カプロン酸ポリマーである、請求項2に記載の医薬組成物。
- 前記アデノシン受容体アンタゴニストが1,3−ジプロピル−8−(3−ノルアダマンチル)キサンチンである、請求項2に記載の医薬組成物。
- 前記活性物質がANP受容体アンタゴニストであり、当該アンタゴニストが、ANP受容体の少なくとも50%が占有される用量で投与される、請求項2又は3に記載の医薬組成物。
- 前記活性物質がアデノシン受容体アンタゴニストであり、当該アンタゴニストが、アデノシン受容体の少なくとも50%が占有される用量で投与される、請求項2又は4に記載の医薬組成物。
- 治療のために、血流中の測定可能なMR-プロANP又はMR-プロADPであるバイオマーカーの上昇に基づいて、臨床的に明らかな型のアルツハイマー認知症を発症するリスクが上昇した患者として特定できる患者群が選択される、請求項2〜6のいずれか1項に記載の医薬組成物。
- 前記血液試料が血清又は血漿試料である、請求項1に記載の方法。
- 測定が免疫診断法を用いて行なわれる、請求項1に記載の方法。
- アルツハイマー病への転換のリスクが上昇している軽度認知障害患者の層別化と特定のための、MR-プロANP又はMR-プロADPであるバイオマーカーの使用。
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AU2007233320B2 (en) | 2006-04-04 | 2013-12-12 | Singulex, Inc. | Highly sensitive system and methods for analysis of troponin |
US7838250B1 (en) | 2006-04-04 | 2010-11-23 | Singulex, Inc. | Highly sensitive system and methods for analysis of troponin |
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US5015633A (en) * | 1987-04-27 | 1991-05-14 | E. R. Squibb & Sons, Inc. | Method for inhibiting loss of cognitive functions employing an ace inhibitor |
AU2315388A (en) * | 1987-07-17 | 1989-02-13 | Brigham And Women's Hospital | Use of atrial peptide antibodies, receptor antagonists, and atrial peptide synthesis inhibitors in controlling renal and systemic vasodilation in diabetes mellitus |
JP2859684B2 (ja) * | 1990-04-10 | 1999-02-17 | 協和醗酵工業株式会社 | 新規生理活性物質hs―142―1およびその製造法 |
WO2002038141A2 (en) * | 2000-11-08 | 2002-05-16 | Massachusetts Institute Of Technology | Compositions and methods for treatment of mild cognitive impairment |
AUPR916301A0 (en) * | 2001-11-29 | 2001-12-20 | Fujisawa Pharmaceutical Co., Ltd. | Pyrazolopyridine compound and pharmaceutical use thereof |
JP2005528395A (ja) * | 2002-04-05 | 2005-09-22 | ザ ユニバーシティ オブ エディンバラ | 組成物 |
JP2005530788A (ja) * | 2002-05-13 | 2005-10-13 | メルク エンド カムパニー インコーポレーテッド | フェニル置換イミダゾピリジン類およびフェニル置換ベンズイミダゾール類 |
AU2003291358A1 (en) * | 2002-11-07 | 2004-06-03 | Molecular Geriatrics Corporation | Methods for predicting whether subjects with mild cognitive impairment (mci) will develop alzheimer's disease |
US20070031908A1 (en) * | 2003-03-18 | 2007-02-08 | Norbert Lamping | Method for detecting a progressive, chronic dementia disease, and corresponding peptides and detection reagents |
DE10316583A1 (de) * | 2003-04-10 | 2004-10-28 | B.R.A.H.M.S Aktiengesellschaft | Bestimmung eines midregionalen Proadrenomedullin-Teilpeptids in biologischen Flüssigkeiten zu diagnostischen Zwecken, sowie Immunoassays für die Durchführung einer solchen Bestimmung |
EP1480041A1 (en) * | 2003-05-22 | 2004-11-24 | Innogenetics N.V. | Method for the prediction, diagnosis and differential diagnosis of Alzheimer's disease |
WO2007112288A2 (en) * | 2006-03-23 | 2007-10-04 | Mount Sinai School Of Medicine | Cardiovascular composition and use the same for the treatment of alzheimers disease |
DE102006023175A1 (de) * | 2006-05-17 | 2007-11-22 | B.R.A.H.M.S Aktiengesellschaft | In vitro Verfahren zur Diagnose und Frühdiagnose von neurodegenerativen Erkrankungen |
DE102006027818A1 (de) * | 2006-06-16 | 2007-12-20 | B.R.A.H.M.S. Aktiengesellschaft | In vitro Multiparameter-Bestimmungsverfahren zur Diagnose und Frühdiagnose von neurodegenerativen Erkrankungen |
JP2010524844A (ja) * | 2007-04-26 | 2010-07-22 | エーザイ・アール・アンド・ディー・マネジメント株式会社 | 認知症のためのシンナミド化合物 |
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- 2009-01-29 WO PCT/EP2009/051035 patent/WO2009095454A2/de active Application Filing
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US20110039343A1 (en) | 2011-02-17 |
EP2247287B1 (de) | 2015-08-12 |
JP2011511282A (ja) | 2011-04-07 |
CN101977594B (zh) | 2015-09-02 |
ES2552816T3 (es) | 2015-12-02 |
WO2009095454A2 (de) | 2009-08-06 |
WO2009095454A3 (de) | 2009-10-01 |
CN101977594A (zh) | 2011-02-16 |
HK1152649A1 (zh) | 2012-03-09 |
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