Synthesis and immunological evaluation of N-acyl modified Globo H derivatives as anticancer vaccine candidates

Area of Science:

• Immunology
• Carbohydrate Chemistry
• Cancer Research

Background:

• Globo H is a tumor-associated carbohydrate antigen (TACA) targeted for cancer immunotherapy.
• Tumor-associated carbohydrate antigens often lack immunogenicity, hindering effective immune responses.
• Developing potent vaccines against TACAs is crucial for advancing cancer immunotherapies.

Purpose of the Study:

• To synthesize novel Globo H analogues with modified N-acyl groups.
• To create glycoconjugate vaccines using modified Globo H and CRM197 carrier protein.
• To evaluate the immunogenicity and efficacy of these synthetic anticancer vaccine candidates.

Main Methods:

• Preparation of Globo H analogues via a preactivation-based glycosylation strategy.
• Conjugation of modified Globo H derivatives with CRM197 carrier protein.
• Immunological studies in Balb/c mice using glycoconjugates with C34 adjuvant.

Main Results:

• Synthetic Globo H analogues with fluorine modification were successfully prepared.
• The resulting glycoconjugates induced higher titers of IgG antibodies.
• These antibodies recognized naturally occurring Globo H on cancer cells and mediated complement-dependent cell lysis.

Conclusions:

• Modified Globo H glycoconjugates demonstrate potential as effective anticancer vaccine candidates.
• Fluorine modification of the N-acyl group enhances immunogenicity and efficacy.
• These findings support the development of novel carbohydrate-based cancer immunotherapies.