The preventive and therapeutic potential of DNA vaccines combined with benefits of lipid-based delivery (lipofection) allow efficient nucleic acid transfer and immunization applicable in treatment of infections, cancer or autoimmune disorders. Lipofecting compositions consisting of cationic and neutral lipids can be used for both in vitro and in vivo applications and may also play the role of adjuvants. Here we describe a simple protocol of DNA vaccine carrier preparation based on cationic polyprenyl derivatives (PTAI-trimethylpolyprenylammonium iodides) and commonly used helper lipids with use of basic laboratory equipment. Such formulas have proven effective for immunization of animals as well as for cell transfection.
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