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© Institut Pasteur
Cristaux de cellulase, enzyme purifiée de Clostridium thermocellum permettant la digestion de la cellulose. Image colorisée.
Publication : The journal of peptide research : official journal of the American Peptide Society

Induction of carbohydrate-specific antibodies in HLA-DR transgenic mice by a synthetic glycopeptide: a potential anti cancer vaccine for human use

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The journal of peptide research : official journal of the American Peptide Society - 01 Sep 2003

Vichier-Guerre S, Lo-Man R, BenMohamed L, Dériaud E, Kovats S, Leclerc C, Bay S

Link to Pubmed [PMID] – 12895273

J. Pept. Res. 2003 Sep;62(3):117-24

Over the last few years, anticancer immunotherapy has emerged as a new exciting area for controlling tumors. In particular, vaccination using synthetic tumor-associated antigens (TAA), such as carbohydrate antigens hold promise for generating a specific antitumor response by targeting the immune system to cancer cells. However, development of synthetic vaccines for human use is hampered by the extreme polymorphism of human leukocyte-associated antigens (HLA). In order to stimulate a T-cell dependent anticarbohydrate response, and to bypass the HLA polymorphism of the human population, we designed and synthesized a glycopeptide vaccine containing a cluster of a carbohydrate TAA B-cell epitope (Tn antigen: alpha-GalNAc-Ser) covalently linked to peptides corresponding to the Pan DR ‘universal’ T-helper epitope (PADRE) and to a cytotoxic T lymphocyte (CTL) epitope from the carcinoembryonic antigen (CEA). The immunogenicity of the construct was evaluated in outbred mice as well as in HLA transgenic mice (HLA-DR1, and HLA-DR4). A strong T-cell dependent antibody response specific for the Tn antigen was elicited in both outbred and HLA transgenic mice. The antibodies induced by the glycopeptide construct efficiently recognized a human tumor cell line underlying the biological relevance of the response. The rational design and synthesis of the glycopeptide construct presented herein, together with its efficacy to induce antibodies specific for native tumor carbohydrate antigens, demonstrate the potential of a such synthetic molecule as an anticancer vaccine candidate for human use.

http://www.ncbi.nlm.nih.gov/pubmed/12895273