JP2022533431A - ペプチド試料を調製する方法 - Google Patents
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- G01N1/00—Sampling; Preparing specimens for investigation
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Abstract
Description
本発明の技術分野は、生物学的試料に由来するタンパク質の生化学分析の分野である。
●タンパク質の変性に適した試薬、
●ジスルフィド結合の還元に適した試薬及びおそらくはアルキル化剤、
●タンパク質の酵素消化に適した試薬、並びに
●固体担体であってポリスチレン‐ジビニルベンゼンポリマーの一群から選択された少なくとも1つのポリマーを含んでいる固体担体上の逆相クロマトグラフィに適した試薬、
を含んでいる。
前記試薬は、当業者に良く知られた既存の試薬から選択される。
●神経変性、特にアルツハイマー病、
●神経疾患又は精神疾患、特に多発性硬化症及び自閉症、
●欠損症、感染症、炎症又は栄養不良の状態、
●慢性疾患又は進行性の疾患、特にがん、肝炎又は代謝性疾患、
から選択された特定の健康状態又は疾患の検出及び/又はモニタリングのための使用に関する。
本発明による方法の効率性について、LC‐MSによる26種のタンパク質の検出及び定量によって、本発明の方法を使用して処理されたDBS試料の分析(「DBS‐RPW」)及び、個々に、従来技術の方法を使用して処理された血漿試料の分析(「血漿」)を、DBS試料から直接行われた分析(「標準的DBS」)と比較することにより、評価した。本発明の方法のステップは図1Aに図解されており、血漿から、かつ従来技術の方法に従って試料を調製する方法のステップは、図1Bに図解されている。実験は2連で行い、LC‐MS分析はそれぞれ2回行った。26種のタンパク質は、以下すなわちA1BG、A2MG、ANT3、ApoA1、ApoA2、ApoB100、ApoC2、ApoE、B2M、CERU、CF_X、C2、C3、C4B、CRP、CysC、FIBA、HPT、FIBB、IGFB3、PLMN、ORM、RET4、TRANSF、TTHY、ALBUである。
Claims (9)
- 生物学的試料からのペプチド試料のin vitro調製のための方法であって、以下の連続したステップ、
a)前記試料中に存在するタンパク質の変性ステップ、
b)ステップa)で生じたタンパク質の還元及びアルキル化のステップ、
c)ステップb)で生じたタンパク質の、固体ポリマー担体上での逆相クロマトグラフィによる清浄化のステップであって、前記固体担体は、少なくとも1つのポリスチレン‐ジビニルベンゼンポリマーを含んでいるステップ、並びに
d)プロテアーゼによる、ステップc)で生じたタンパク質の消化のステップ、
を含む方法。 - 前記生物学的試料は、全血、血清及び血漿からなる群から選択された液体形態の血液試料であることを特徴とする、請求項1に記載の方法。
- 前記生物学的試料は、全血、血清及び血漿からなる群から選択された血液試料であること、前記試料は固体形態又は乾燥形態であること、並びに前記方法は、タンパク質の変性ステップに先立ち、固体形態又は乾燥形態の前記試料からの前記タンパク質の抽出ステップを含むこと、を特徴とする、請求項1に記載の方法。
- 固体形態又は乾燥形態の前記血液試料は、採取紙、好ましくは吸取紙型の紙に沈着しているDBS(乾燥血液スポット)型の試料である、請求項3に記載の方法。
- プロテアーゼによるタンパク質の消化のステップは、トリプシン/エンドプロテイナーゼLys‐Cが酵素量/基質タンパク質量の比を1/10~1/200、好ましくは1/50~1/100として存在する状態で、継続時間を2時間以上、好ましくは10時間以上、好ましくは14時間以上、好ましくは14時間として行われることを特徴とする、請求項1~4のいずれか1項に記載の方法。
- DBS型の試料はステップd)の際に、トリプシン/エンドプロテイナーゼLys‐Cが酵素量/基質タンパク質量の比を1/50~1/100として存在する状態で、継続時間を2時間以上として処理される、請求項1~5のいずれか1項に記載の方法。
- 生物学的試料の中のタンパク質を検出又は定量する方法であって、請求項1~6のいずれか1項に記載のペプチド試料のin vitro調製のための方法と、その後の分析技法による、好ましくは質量分析法による、好ましくは液体クロマトグラフィ質量分析(LC‐MS)技法による、少なくとも1つのタンパク質の検出又は定量のステップとを含む方法。
- 前記少なくとも1つのタンパク質は、以下のタンパク質、すなわちアファミン、アルファ‐1アンチキモトリプシン、アルファ‐1B糖タンパク質(A1BG)、アルファ‐1酸性糖タンパク質、アルブミン(ALBU)、アルファ‐2‐HS糖タンパク質、アルファ‐2マクログロブリン(A2MG)、アンチトロンビン3(ANT3)、アポリポタンパク質B100(ApoB100)、アポリポタンパク質C2(ApoC2)、アポリポタンパク質D、アポリポタンパク質E(ApoE)、アポリポタンパク質M、アポリポタンパク質(a)、アポリポタンパク質a1(ApoA1)、アポリポタンパク質A2(ApoA2)、アポリポタンパク質a4、ベータ‐2糖タンパク質1、ベータ‐2ミクログロブリン(B2M)、ベータ‐Ala‐Hisジペプチターゼ、C4b結合タンパク質(アルファ鎖)、CD5抗原様、cDNA‐FLJ53327、セルロプラスミン(CERU)、コリンエステラーゼ、クラステリン、凝固第X因子(CF‐X)、凝固第XI因子、凝固第XII因子、補体C1q亜成分サブユニットB、補体C1qのサブユニットC、補体C1r亜成分、補体C1s亜成分、補体C2(C2)、補体C3(C3)、補体C4B(C4B)、補体C5、補体成分C8(ベータ鎖)、補体成分C9、補体B因子、補体D因子、補体I因子、シスタチンC(CysC)、コルチコイド結合グロブリン、C反応性タンパク質(CRP)、フィブリノゲン(アルファ鎖)(FIBA)、フィブリノゲン(ベータ鎖)(FIBB)、フィブロネクチン、ファイブリン‐1、ゲルゾリン、ハプトグロビン、ヘモグロビンサブユニットアルファ、ヘモペキシン、ヘパリンコファクター2、インスリン様成長因子結合タンパク質の酸不安定サブユニット、インスリン様成長因子結合タンパク質3、ハプトグロビン(HPT)、インターアルファトリプシンインヒビター重鎖H1、インターアルファトリプシンインヒビター重鎖H2、インスリン様成長因子結合タンパク質3(IGFB3)、リポ多糖類結合タンパク質、 ルミカン、ニューロピリン2、オロソムコイド(ORM)、PEDF、プラスミノゲン(PLMN)、タンパク質AMBP、プロトロンビン、レチノール結合タンパク質4、セロトランスフェリン(TRANSF)、血清アミロイドA4タンパク質、チロキシン結合グロブリン、トランスサイレチン(プレアルブミン)(TTHY)、バソリン、ビタミンD結合タンパク質、ビタミンK依存性プロテインC、ビタミンK依存性プロテインS、レチノール結合タンパク質4(RET4)から選択されることを特徴とする、請求項7に記載の方法。
- 請求項1~8のいずれか1項に記載の方法の使用であって、
-神経変性、特にアルツハイマー病、
-神経疾患又は精神疾患、特に多発性硬化症及び自閉症、
-欠損症、感染症、炎症又は栄養不良の状態、
-慢性疾患又は進行性の疾患、特にがん、肝炎又は代謝性疾患、
から選択された健康状態の検出又は進行のモニタリングのためのペプチド試料の調製のための使用。
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PCT/EP2020/063944 WO2020234287A1 (fr) | 2019-05-20 | 2020-05-19 | Procédé de préparation d'un échantillon peptidique |
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