Synthesis and Immunological Evaluation of Disaccharide Bearing MUC-1 Glycopeptide Conjugates with Virus-Like Particles.

Synthesis and Immunological Evaluation of Disaccharide Bearing MUC-1 Glycopeptide Conjugates with Virus-Like Particles.

Publication date: Sep 09, 2019

Mucin-1 (MUC1) is a highly attractive antigenic target for anti-cancer vaccines. Naturally existing MUC1 can contain multiple types of O-linked glycans, including the Thomsen-Friedenreich (Tf) antigen and the Sialyl Thomsen-nouveau (STn) antigen. In order to target these antigens as potential anti-cancer vaccines, MUC1 glycopeptides SAPDT*RPAP (T* is the glycosylation site) bearing the Tf and the STn antigen respectively have been synthesized. Bacteriophage Qbeta carrier is a powerful carrier for antigen delivery. The conjugates of MUC1-Tf and -STn glycopeptides with Qbeta were utilized to immunize the immune-tolerant human MUC1 transgenic (MUC1.Tg) mice, which elicited superior levels of anti-MUC1 IgG antibodies with titers reaching over 2 million units. The IgG antibodies recognized a wide range of MUC1 glycopeptides bearing diverse glycans. Antibodies induced by Qbeta-MUC1-Tf showed strongest binding with MUC1 expressing melanoma B16-MUC1 cells and effectively killed these cells in vitro. Vaccination with Qbeta-MUC1-Tf first followed by tumor challenge in a lung metastasis model showed significant reductions of the number of tumor foci in the lungs of immunized mice as compared to those in control mice. This was the first time that MUC1-Tf based vaccine has shown in vivo efficacy in a tumor model. As such, Qbeta-MUC1 glycopeptide conjugates have great potentials as anti-cancer vaccines.

Wu, X., McKay, C., Pett, C., Yu, J., Schorlemer, M., Ramadan, S., Lang, S., Behren, S., Westerlind, U., Finn, M.G., and Huang, X. Synthesis and Immunological Evaluation of Disaccharide Bearing MUC-1 Glycopeptide Conjugates with Virus-Like Particles. 24058. 2019 ACS Chem Biol.

Concepts Keywords
Antibodies Glycosylation site
Antigen Tumor
Antigens Potential anti cancer
Bacteriophage Melanoma B16 MUC1
Cancer Vaccines Significant reductions tumor
Disaccharide Efficacy tumor
Foci Vaccination
Glycans Branches of biology
Glycopeptides Glycoproteins
Glycosylation MUC1
IgG Medical specialties
Lung Vaccination
Lungs Mucin
Melanoma Immunoglobulin G
Metastasis Glycopeptide
Mice Cancer vaccine
MUC1 Monoclonal antibodies
Mucin Antibodies
Transgenic
Tumor
Vaccination
Vaccine
Vivo

Semantics

Type Source Name
gene UNIPROT RXFP2
disease MESH metastasis
pathway BSID Melanoma
disease DOID melanoma
disease MESH melanoma
gene UNIPROT EEF1A2
disease DOID cancer
disease MESH cancer
gene UNIPROT MUC1

Similar

Original Article

Leave a Comment

Your email address will not be published. Required fields are marked *