Neutralization of HPV16, 18, 31, and 58 pseudovirions with antisera induced by immunizing rabbits with synthetic peptides representing segments of the HPV16 minor capsid protein L2 surface region
| Autor: | Tadahito Kanda, Kazunari Kondo, Hiroyuki Ochi, Hiroyuki Yoshikawa, Tamae Matsumoto, Yoshiyuki Ishii |
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| Rok vydání: | 2007 |
| Předmět: |
HPV16
Injections Subcutaneous viruses Molecular Sequence Data Peptide Cross Reactions Antibodies Viral Minor capsid protein L2 Neutralization Epitope Epitopes Antigen Antibody Specificity Neutralization Tests Virology Animals Amino Acid Sequence Papillomavirus Vaccines Neutralizing antibody Antigens Viral Papillomaviridae Peptide sequence Antiserum chemistry.chemical_classification Human papillomavirus 16 Vaccines Synthetic Human papillomavirus 18 biology Neutralization epitope Immune Sera Papillomavirus Infections Oncogene Proteins Viral Molecular biology chemistry Capsid biology.protein Capsid Proteins Immunization Rabbits Peptides |
| Zdroj: | Virology. 358:266-272 |
| ISSN: | 0042-6822 |
| Popis: | Neutralizing antibody against human papillomavirus (HPV) minor capsid protein L2 can cross-neutralize different HPV genotypes in vitro. To identify the segments containing the cross-neutralization epitopes of HPV16 L2, we characterized antisera obtained by immunizing two rabbits with each of the ten synthetic peptides of 14 to 20 amino acids (aa) long, which represents a part of the HPV16 L2 sequence from aa 14 to 144. The antisera against the peptides within the region from aa 18 to 144 efficiently bound to HPV16 L1/L2-capsids and neutralized HPV16 pseudovirions, indicating that the region is displayed on the surface of the capsids and contains several neutralization epitopes. Antiserum against the peptide from aa 18 to 38 (anti-P18/38) cross-neutralized HPV18. Anti-P56/75 cross-neutralized HPV18, 31, and 58. Anti-P61/75 and anti-P64/81 cross-neutralized HPV18 and 58. Anti-P96/115 and the antiserum induced by a mutant P96/115 (S and T at aa 101 and 112 were replaced with L and S, respectively) cross-neutralized HPV31 and 58. The mixture of equal volumes of three antisera, anti-P18/38, anti-P56/75, and anti-mutant P96/115, neutralized HPV16, 18, 31, and 58 more efficiently than anti-P56/75 alone, suggesting that there is a synergistic effect of antibodies on the cross-neutralization. The cross-neutralization appears to be correlated with conserved aa sequences among HPV types. The data in this study provide a basis for designing vaccine antigens effective against a broader spectrum of the high-risk HPVs. |
| Databáze: | OpenAIRE |
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