Journal
BIOCONJUGATE CHEMISTRY
Volume 17, Issue 2, Pages 493-500Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bc0502816
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- NIAID NIH HHS [R21 AI054354] Funding Source: Medline
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Human antibody 2G12 is a broadly neutralizing antibody that exerts its anti-HIV activity by targeting a novel oligomannose cluster on HIV-1 gp120. It was previously demonstrated that synthetic oligomannose clusters could mimic the carbohydrate epitope of 2G12 and showed enhanced antigenicity (Wang L. X. et al. (2004) Chem. Biol. 11, 127). This paper describes the synthesis of oligomannose-containing glycoconjugates that include either a carrier protein or a universal T-helper epitope peptide to provide an effective immunogen. It was shown that the synthetic neoglycoconjugates containing oligomannose clusters could be recognized by the human antibody 2G12. Rabbit immunization studies revealed that only a small fraction of antibodies raised by the glycoconjugates was directed to the carbohydrate antigens, with the majority of the IgG type antibodies being directed to the linkers in the conjugates. The anti-sera showed weak cross-reactivity to HIV-1 gp120.
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