Related Experiment Video
Updated: Jun 4, 2025

Glycomics-Guided Glycoproteomics Facilitates Comprehensive Profiling of the Glycoproteome in Complex Tumor Microenvironments
Published on: February 7, 2025
Mass Spectrometry-Based Glycomics and Proteomics Profiling of On-Slide Digested Tissue from Complex Biological
Sayantani Chatterjee1, Joseph Zaia1,2, Manveen K Sethi3
1Department of Biochemistry, Center for Biomedical Mass Spectrometry, Boston University School of Medicine, Boston, MA, USA.
This study presents an on-slide tissue digestion method for comprehensive glycoproteome mapping. This technique enables detailed profiling of glycosaminoglycans, N-linked glycans, and (glyco)peptides from small tissue samples.
Area of Science:
- Biochemistry
- Proteomics
- Glycomics
Background:
- Mass spectrometry is crucial for analyzing complex biological samples.
- Current methods for tissue glycoproteome analysis can be limited by sample variability and regional specificity.
Purpose of the Study:
- To develop a simple, cost-effective method for comprehensive glycoproteome mapping from small tissue samples.
- To enable simultaneous analysis of glycosaminoglycans, N-linked glycans, and (glyco)peptides.
Main Methods:
- On-slide tissue digestion protocol for fresh frozen or formalin-fixed paraffin-embedded tissue slides.
- Sequential enzymatic digestions and desalting without prior derivatization.
- Liquid chromatography-tandem mass spectrometry for biomolecule identification and quantification.
Main Results:
- Simultaneous identification of glycosaminoglycan disaccharides (hyaluronan, chondroitin sulfate, heparan sulfate), N-linked glycans, and intact (glyco)peptides.
- Detailed profiling of disaccharide composition, glycan structures, peptide abundances, and site-specific glycan occupancies from single tissue spots.
- Method applicable to tissue volumes as small as 10 nL.
Conclusions:
- The on-slide digestion method provides in-depth glycoproteome profiling from minimal tissue samples.
- This approach offers a robust and disseminable tool for biomedical laboratories.
- Enables detailed characterization of tissue composition and molecular dynamics.
Related Concept Videos
MALDI-TOF Mass Spectrometry
Matrix-assisted laser desorption ionization (MALDI) is a commonly...
Mass Spectrometry: Complex Analysis
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
Peptide Identification Using Tandem Mass Spectrometry
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...

