Serial 3D imaging mass spectrometry at its tipping point

Area of Science:

• Life Sciences
• Biomedical Research
• Analytical Chemistry

Background:

• Biology is inherently 3-dimensional, necessitating advanced imaging techniques.
• Imaging mass spectrometry (MS) is a label-free method for localizing molecules in situ.
• Serial 3D imaging MS combines serial sectioning with MS for 3D molecular mapping.

Purpose of the Study:

• To review the development and challenges of serial-sectioning 3D imaging MS.
• To discuss the transition of 3D imaging MS from academic research to a practical tool.
• To identify future applications that leverage the unique capabilities of 3D imaging MS.

Main Methods:

• Reconstruction of 3D molecular images from serial sections analyzed by mass spectrometry.
• Development of protocols for reproducible sample preparation and accelerated data acquisition.
• Computational analysis of large datasets generated by 3D imaging MS.

Main Results:

• Significant technical challenges in serial-sectioning 3D imaging MS have been addressed over the past decade.
• Methodological advancements have improved reproducibility, speed, and data analysis.
• Emerging experimental data begins to utilize the 3D spatial information provided by imaging MS.

Conclusions:

• 3D imaging MS has matured but primarily focuses on method development.
• Future success depends on identifying specific biological applications that benefit from its 3D chemical sensitivity.
• The technique needs to move beyond academic curiosity to become a valuable tool for biological and medical questions.