Abstract:
:ADVAX is a DNA-based candidate HIV vaccine that was safe but weakly immunogenic when delivered intramuscularly (IM) in humans. Studies were performed in animal models to determine whether an alternative delivery method, in vivo electroporation (EP), could improve the immunogenicity of ADVAX while maintaining an acceptable safety profile. Immunization of mice with ADVAX with or without EP at weeks 0, 3, and 6, revealed significantly higher gamma interferon ELISpot responses to all antigens in the EP groups. Antigen-specific CD4+ and CD8+ T cell responses, as quantified by intracellular cytokine staining, both improved significantly with EP. Evaluation of repeat-dose toxicity of ADVAX-EP in rabbits did not reveal any safety concerns. Biodistribution studies of ADVAX delivered IM and with EP in rats indicated that the vaccine was localized predominantly to the administration site in both groups. PCR-based quantitation of residual plasmid at Day 60 indicated that the potential for integration events into the host genome was low for both IM and EP delivery. Taken together, these data supported the clinical development of ADVAX delivered with EP in human volunteers.
journal_name
Vaccinejournal_title
Vaccineauthors
Dolter KE,Evans CF,Ellefsen B,Song J,Boente-Carrera M,Vittorino R,Rosenberg TJ,Hannaman D,Vasan Sdoi
10.1016/j.vaccine.2010.11.011subject
Has Abstractpub_date
2011-01-17 00:00:00pages
795-803issue
4eissn
0264-410Xissn
1873-2518pii
S0264-410X(10)01617-8journal_volume
29pub_type
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