レーザーキャプチャFFPEサンプルとOrbitrap Astral DIA-MSのための低入力プロテオミクスプロトコル
Daniele Musiani1, Alessandro Cuomo2
1European Institute of Oncology (IEO), Mass Spectrometry Unit (MSU), Milan, Italy.
Methods in molecular biology (Clifton, N.J.)
|February 2, 2026
まとめ
レーザーマイクロダイセクション(LMD)および質量分析(MS)のための2つの新しいプロトコルは、小さな組織サンプルの高感度プロテオミクス分析を可能にします。これらの方法は、臨床サンプルの組織の不均一性の詳細な調査のためにサンプル損失を最小限に抑えます。
科学分野:
- プロテオミクス
- 分子生物学
- 生化学
背景:
- レーザーマイクロダイセクション(LMD)と質量分析(MS)を組み合わせたものは、組織の不均一性を分析するために不可欠です。
- 低入力組織サンプルの分析は、プロテオーム研究において重大な課題をもたらします。
- 既存のプロトコルは、サンプル損失の最小化または手動処理に最適化されていない場合があります。
研究 の 目的:
- LMD-MS分析のための低入力サンプル調製のための2つの最適化されたプロトコルを提示すること。
- マイクロダイセクションされた組織領域の高感度、高解像度のプロテオーム分析を可能にすること。
- 臨床サンプルの再現性のあるプロテオームプロファイリングのためのガイダンスを提供すること。
主な方法:
- 2つの低入力サンプル調製ワークフローの開発と最適化:固相増強調製(SP3)および界面活性剤/有機溶媒(DDM/ACN)。
- 小さな組織領域(厚さ10μmのFFPE組織の1500μm²まで)にプロトコルを適用すること。
- データ非依存型取得(DIA)を使用した高解像度質量分析(Orbitrap Astral)との統合。
主要な成果:
- プロトコルはサンプル損失を最小限に抑え、非常に小さな組織領域の分析を可能にします。
- 低入力サンプルから実質的なプロテオーム深度で、再現性のあるプロテオームプロファイリングを達成しました。
- マイクロダイセクションされたFFPE組織の高感度かつ高解像度のプロテオーム分析を実証しました。
結論:
- 開発されたSP3およびDDM/ACNプロトコルは、低入力LMD-MSのための堅牢なソリューションを提供します。
- これらの方法は、臨床サンプルにおける空間的不均一性の調査を高い精度で促進します。
- プロトコルは手動処理に適しており、自動化プラットフォームを持たない研究者にとってのアクセス可能性を高めます。
関連する概念動画
Proteomics
9.8K
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
9.8K
Multi-input and Multi-variable systems
423
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...
In the absence of...
423
Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model
318
Drugs administered through various routes can lead to nonlinear elimination, resulting in complex pharmacokinetic behaviors crucial to understanding efficacious drug dosing.
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
318
Sampling Methods: Sample Types
3.3K
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
3.3K
Sampling Plans
985
Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
985
Sample Handling
2.7K
Transportation of samples from the collection point to the laboratory, as well as storage and preservation techniques, are crucial for maintaining sample integrity and ensuring accurate and reliable test results.
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...
Samples should be transported carefully from collection points to the laboratory. They should be properly sealed and clearly labeled to prevent cross-contamination. To preserve the sample integrity, optimal temperature conditions during transport are essential. This could involve using...
2.7K


