Sample Treatment for Tissue Proteomics in Cancer, Toxicology, and Forensics

Area of Science:

• Proteomics
• Biomarker Discovery
• Toxicology
• Forensic Science

Background:

• Proteomics has rapidly expanded since the 1990s, significantly contributing to life sciences.
• Improvements in sample preparation are crucial for understanding disease mechanisms, drug effects, and enabling new fields like forensics.

Purpose of the Study:

• To review recent developments in tissue proteomics sample preparation strategies.
• Focus on applications in cancer, toxicology, and forensic science.

Main Methods:

• Cancer: Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) and liquid extraction surface analysis (LESA) for tumor biomarker localization.
• Toxicology: Liquid chromatography-tandem mass spectrometry (LC-MS/MS) for drug-induced liver injury and environmental insult studies.
• Forensics: Mass spectrometry (MS) techniques, including MALDI-MS, for blood and fingerprint evidence analysis.

Main Results:

• MALDI-MSI and LESA offer spatial resolution for cancer biomarker identification.
• LC-MS/MS remains the gold standard for quantitative toxicoproteomics.
• Rapid MS techniques like MALDI-MS are promising for time-sensitive forensic analyses.

Conclusions:

• Advanced proteomics sample preparation is vital across diverse scientific domains.
• Methodologies are tailored to specific applications, balancing information depth with analysis speed.
• Future directions include developing rapid, high-information-yield techniques for forensic proteomics.