Lewis Y tetrasaccharide - the key carbohydrate antigen to unlock precision tumor immunotherapy

Lewis Y tetrasaccharide is one of the important carbohydrate antigens on the cell surface and an outstanding representative of tumor-associated carbohydrate antigens. It is not only a key molecule for cell recognition and signaling, but also an indispensable core raw material in the field of modern tumor immunotherapy and diagnosis.

Chemical Information

Chemical name: 2-acetamido-2-deoxy-3-O-(α-L-glucopyranose)-4-O-[2-O-(α-L-glucopyranose)-β-D-galactopyran]-D-glutamic acid

Common name: Lewis Y tetrasaccharide

English name: Lewis Y tetrasaccharide

Chemical formula: C26H45NO19

Molecular weight: 675.63 g/mol

CAS number: 82993-43-9

Structural features

The structure of Lewis Y tetrasaccharide is exquisite and unique. Its core characteristics are:

Unique antigenic determinant: Lewis Y antigen has a tetrasaccharide structure of [Fucα1→2Galβ1→3(Fucα1→4)GlcNAc], and two fucose (Fuc) branches are the structural basis of its immune specificity.

High immunogenicity: This structure is highly expressed on the surface of a variety of epithelial cancer cells (such as breast cancer, ovarian cancer, colorectal cancer, etc.), but its expression is limited in normal tissues, making it an ideal target for immune attack.

Main applications and advantages

1. Core antigens of anti-cancer vaccines and immunotherapy

Precisely activate the immune system: Using Lewis Y tetrasaccharide as an antigen, the body can be induced to produce specific antibodies and T cell immune responses, thereby identifying and attacking Lewis Y-expressing tumor cells like "precision guidance".

Develop combined vaccines: Lewis Y tetrasaccharide can be coupled with a carrier protein (such as KLH) to prepare a highly efficient glycoconjugate vaccine, which significantly enhances its immunogenicity and provides a new strategy for the prevention and treatment of cancer recurrence.

2. Basics of development of targeted drugs and diagnostic reagents

Target of antibody drug conjugates (ADC): Monoclonal antibodies developed against Lewis Y antigen are the ideal "navigator" for constructing ADC drugs. These antibodies can accurately deliver cytotoxic drugs to tumor sites, enabling efficient and low-toxic cancer treatment.

Tumor diagnosis and imaging: Anti-Lewis Y antibodies labeled with radioisotopes or fluorescent groups can be used for in vivo tumor imaging (such as PET-CT) or in vitro pathology detection to achieve early detection, precise location and staging of tumors.

3. Basic research and biological tool development

Glycobiology and Cancer Research: Lewis Y tetrasaccharide is a valuable tool for studying the role of glycosylation in tumor occurrence, development, invasion and metastasis, helping to reveal new disease mechanisms.

Host-pathogen interaction research: Some pathogens (such as Helicobacter pylori) can also express similar structures to Lewis Y. Lewis Y tetrasaccharide can be used to study the immune evasion and infection mechanisms of microorganisms.

Conclusion

Lewis Y tetrasaccharide is more than just a sugar chain molecule, it is a bridge to the next generation of precision oncology therapies. From therapeutic cancer vaccines to targeted drugs, from in vitro diagnostics to in vivo imaging, its application prospects are broad.