Efficient and Cost-Effective Enzyme Deposition onto Tissues for Mass Spectrometry Imaging of N-Glycans Using a...

Area of Science:

• Biochemistry
• Analytical Chemistry
• Biotechnology

Background:

• Mass spectrometry imaging (MSI) is crucial for mapping N-linked glycans, vital biomarkers for diseases, within biological tissues.
• Enzyme application, such as peptide N-glycosidase F (PNGase F), is necessary to release N-linked glycans for MSI analysis.
• Current enzyme deposition equipment for MSI is often expensive and inaccessible to many research laboratories.

Purpose of the Study:

• To develop and evaluate a cost-effective alternative for enzyme deposition in MSI.
• To demonstrate the efficacy of a mini-humidifier for applying enzymes onto tissue sections for glycan analysis.
• To provide an accessible method for spatial glycan profiling using MSI.

Main Methods:

• Development of a novel, low-cost mini-humidifier device for enzyme application.
• Application of peptide N-glycosidase F (PNGase F) using the mini-humidifier onto mouse brain tissue sections.
• Analysis of N-linked glycans using nanospray desorption electrospray ionization (nano-DESI) MSI.

Main Results:

• The mini-humidifier effectively applied PNGase F onto tissue sections for N-linked glycan MSI.
• The performance of the mini-humidifier was comparable to the widely used HTX-TM Sprayer.
• Spatial distribution of N-linked glycans in mouse brain tissue was successfully visualized.

Conclusions:

• The mini-humidifier offers a cost-effective and efficient solution for enzyme deposition in MSI.
• This approach enhances accessibility to glycan analysis via MSI for a broader range of laboratories.
• The method facilitates the spatial investigation of N-linked glycans as potential disease biomarkers.