We have recently introduced the use of replication defective human papillomavirus pseudovirions as a novel approach to improve naked DNA vaccine deliv ery in vivo. DNA plasmids can be packaged sellckchem into the papillomavirus L1 and L2 capsid proteins to generate a pseudovirion that can efficiently deliver the encapsi dated DNA into infected Inhibitors,Modulators,Libraries cells. The encapsulation of the therapeutic DNA vaccine protects the DNA from nucleases and provides efficient targeted delivery Inhibitors,Modulators,Libraries with great stability. Additionally, because HPV pseudovirions contain a DNA construct with genes of interest, but not the natural HPV viral genome, they are non replicative and lack many of the safety concerns associated with live viral vectors. Furthermore, neutralizing antibodies against one type of papillomavirus pseudovirion are usually not cross reactive to other types of papilloma virus pseudovirions.

The spectrum of over 100 different types of papillomavirus pseudovirions allows for repeated Inhibitors,Modulators,Libraries boosting with different types of HPV pseudo Inhibitors,Modulators,Libraries virions without concern for preexisting immunity. Thus, HPV pseudovirions represent a potentially safe gene delivery method for clinical usage. We previously characterized human papillomavirus pseudovirions as an efficient delivery system for DNA vaccines in vivo. We demonstrated that vaccination with HPV 16 pseudovirions containing a DNA vaccine encoding model antigen, ovalbumin, subcutaneously generated significantly stron ger OVA specific CD8 T cell immune responses com pared with OVA DNA vaccination via gene gun in a dose dependent manner.

We demonstrated that the L2 minor capsid Inhibitors,Modulators,Libraries protein was essential for the infectivity mediated by HPV 16OVA psV. Additionally, we showed that papillomavirus pseudovirions are capable of infecting DCs. Furthermore, the papillomavirus L1 capsid protein activates DCs to augment the immune response. Thus, human papillomavirus pseudovir ions represent an innovative and promising delivery sys tem to trigger potent antigen specific immune responses. In the current study, we further characterize the appli cation of HPV pseudovirions as an important method for the delivery of naked DNA immunization. We com pared the method of preparing HPV pseudovirions for their ability to efficiently deliver DNA to cells. In addi tion, we analyzed http://www.selleckchem.com/products/Perifosine.html the capability of HPV pseudovirions to deliver naked DNA to a bone marrow derived dendri tic cell line. Furthermore, we compared the delivery of DNA by HPV pseudovirions with other methods of administration and other forms of vaccines for their ability to generate antigen specific CD8 T cell immune responses. Our data indicate that the method of prepar ing HPV pseudovirion is crucial for their ability to infect cells.