A Guide to MALDI Imaging Mass Spectrometry for Tissues.

Area of Science:

• Biomedical Imaging
• Analytical Chemistry
• Molecular Biology

Background:

• Imaging mass spectrometry (IMS) is a powerful technique for visualizing molecular distribution in biological samples.
• Matrix-assisted laser desorption/ionization (MALDI) IMS is particularly effective for analyzing tissue sections.
• Advances in IMS technology have expanded its capabilities for molecular profiling.

Purpose of the Study:

• To review recent advancements in MALDI IMS for tissue analysis.
• To discuss sample preparation strategies for diverse analytes and tissue types.
• To explore multimodal imaging approaches and data analysis platforms.

Main Methods:

• Focus on matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS).
• Exploration of sample preparation for fresh-frozen and formalin-fixed tissues.
• Discussion of strategies for analyzing lipids, metabolites, proteins, peptides, and glycans.
• Consideration of multimodal imaging and data analysis platforms.

Main Results:

• Detailed overview of MALDI IMS techniques and their applications.
• Insights into optimizing experimental design and standardization for MALDI IMS studies.
• Demonstration of MALDI IMS utility across various scientific disciplines.

Conclusions:

• MALDI IMS is a versatile tool with significant potential in medical research.
• The review underscores the importance of standardized protocols and advanced data analysis for successful IMS studies.
• MALDI IMS applications extend to plant biology and microbe metabolism, showcasing its broad impact.