Several vaccine candidates against human papilloma virus (HPV), the cause of cervical cancer, are under clinical development. These vaccines which consist of VLPs as the virus like particles, are able to induce antibodies to neutralize the virus infec...
Several vaccine candidates against human papilloma virus (HPV), the cause of cervical cancer, are under clinical development. These vaccines which consist of VLPs as the virus like particles, are able to induce antibodies to neutralize the virus infection. We performed the prophylactic study of the vaccine derived from HPV and neutralization test to standardize HPV serological methods as a measure of validation. We assessed immunogeneity levels and virus neutralization activity of the virus like particles consisting of HPV 16 VLPs. To purify HPV 16 VLPs, the yeast strains expressing VLPs were grown, broken, and purified using sucrose cushion ultracentrifugation and size exclusion chromatography. VLPs were identified using western blot in the supernatant of the sucrose fractions and the early fraction of the size exclusion chromatography. To validate the vaccine efficacy of the purified HPV 16 VLPs and investigate the properties of HPV 16 VLPs to induce the humoral immunity, ELISA assay was performed and a significant increased production of anti-HPV 16 VLP antibodies was observed in sera from the immunized mice. The neutralization activity of antibodies in the sera from the vaccinated mice was undertaken using hemmagglutination inhibition assay. The high levels of the neutralization activity were found in sera from the VLP vaccinated mice. We performed the documentation of SOPs based on the results of this study, which could be useful to make HPV Laboratory technology education program for North-East asian scientists in future. The results of this study could be applied to validate the efficacy of the HPV vaccine candidates and to use an international reference standard for HPV serological methods in future.