Skip to Content
Merck
  • I. Poloxamer-formulated plasmid DNA-based human cytomegalovirus vaccine: evaluation of plasmid DNA biodistribution/persistence and integration.

I. Poloxamer-formulated plasmid DNA-based human cytomegalovirus vaccine: evaluation of plasmid DNA biodistribution/persistence and integration.

Human gene therapy (2005-10-13)
Adrián Vilalta, Rohit K Mahajan, Jukka Hartikka, Denis Rusalov, Terrie Martin, Vesselina Bozoukova, Vicky Leamy, Keith Hall, Peggy Lalor, Alain Rolland, David C Kaslow
ABSTRACT

Preclinical studies were conducted in mice and rabbits to evaluate biodistribution/persistence and potential integration of plasmid DNA (pDNA) after intramuscular administration of a poloxamer-formulated pDNAbased vaccine, VCL-CT01, encoding gB, pp65, and IE1 human cytomegalovirus (hCMV) immunogens. Tissue distribution in mice vaccinated with VCL-CT01 was compared with that in mice vaccinated with a phosphate- buffered saline (PBS)-formulated control pDNA vaccine. Residual pDNA copy number (PCN), in selected tissues collected on days 3, 30, and 60 after vaccination, was measured by quantitative polymerase chain reaction. In VCL-CT01-vaccinated mice and in control pDNA-vaccinated mice, pDNA was below the limit of detection by day 60 in all tissues except the injection site. Clearance of pDNA from the injection site was slower in VCL-CT01-vaccinated mice compared with PBS-pDNA-vaccinated mice. An integration study was conducted in rabbits to determine whether pDNA integration into the genome of the vaccinated animal contributed to pDNA persistence. Residual pDNA in VCL-CT01-injected rabbit muscle collected 60 days after vaccination (geometric mean of 1085 PCN/microg total DNA) was comparable to that observed in VCL-CT01- injected mouse muscle (geometric mean of 1471 PCN/microg total DNA) collected at the same time point. pDNA integration was not detectable by column agarose gel electrophoresis despite the persistence of pDNA at the injection site 60 days after vaccination. Therefore the risk of genomic integration of hCMV pDNA formulated with poloxamer was considered negligible.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
MTT Cell Growth Assay Kit, MTT Cell Growth Assay is a colorimetric assay that can be used for either proliferation or complement-mediated cytotoxicity assays.
Pricing and availability is not currently available.