This method is used to screen for specific types of glycans, monitor glycosylation changes in disease, and perform comparative glycoprofiling. It is widely applied in biomedical research, biopharmaceutical quality control, and glycobiology studies due to its simplicity and specificity.
After SDS-PAGE, glycoproteins can either be transferred to a membrane (similar to Western blotting) or detected directly in-gel using labeled lectins (e.g., with biotin, HRP, or fluorescent tags).
There are two main formats:
- In-gel lectin staining, where the gel is incubated directly with the lectin to visualize glycoproteins without transfer.
- Membrane-based lectin blotting, where proteins are transferred and probed with a labeled lectin.
Common sample types include purified glycoproteins, cell lysates, tissue extracts, and biopharmaceutical products run in an SDS gel.
Purposes and applications for lectin glycoblotting
Oncology
Changes in glycan structures, such as increased sialylation or fucosylation, can be visualized using specific lectins, helping identify cancer biomarkers and monitor tumor progression. Lectin blotting is commonly used to detect altered glycosylation and to analyze glycoprotein changes in response to therapy
Infectious Diseases
The technique can reveal glycan motifs on viral envelope proteins or bacterial adhesins that influence infectivity and immune evasion, aiding in vaccine and therapeutic development
Immune and Inflammatory Diseases
Since glycosylation affects immune function and signaling, this technique helps researchers study and analyze glycosylation on antibodies, cytokines, and immune cell receptors
Microbiome
Lectin blotting can be applied to study glycoproteins from gut microbes or their interactions with host glycan, providing insights into host–microbiota communication, especially how microbes bind or modify mucosal glycoproteins in the gut
Biomarkers & Diagnostics
Lectin blotting is a practical tool for detecting disease-related glycosylation changes in clinical samples, such as serum or plasma proteins. It can help identify or validate glyco-biomarkers for diseases like cancer, liver dysfunction, or congenital disorders of glycosylation
Other Fields
- Plant science: lectin blotting helps characterize glycoproteins involved in stress responses, development, or pathogen resistance.
- Agriculture: it’s used to analyze allergenic glycoproteins or study crop glycosylation traits
- Nutraceuticals and cosmetics: it ensures the glycan consistency of functional ingredients. For Human Milk Oligosaccharides (HMOs) and milk glycoproteins, it helps profile glycosylation patterns relevant to infant immunity and gut health, supporting the development of HMO-enriched formulas
