Source: University of Texas Medical Branch at Galveston
Summary: Researchers have developed a less expensive way to produce vaccines that cuts the costs of vaccine production and storage by up to 80 percent without decreasing safety or effectiveness.
Vaccines are the most effective way to prevent and eradicate infectious diseases. Currently, many vaccines have to be manufactured in cell culture or eggs, which is expensive and carries the risk of contaminations. In addition, most vaccines must be kept refrigerated during the transportation from manufacturers to health care clinics. In tropical and subtropical regions, such cold storage requirements could contribute to more than 80 percent of the vaccine cost. The ability to eliminate cell culture or eggs and cold storage will change the process of vaccine development. Researchers at The University of Texas Medical Branch at Galveston have developed a less expensive way to produce vaccines that cuts the costs of vaccine production and storage by up to 80 percent without decreasing safety or effectiveness. The study findings were published in the journal EBioMedicine.
To achieve the goals, the UTMB team engineered a live-attenuated Zika vaccine in the DNA form. Once the DNA is delivered into our body, it launches the vaccine in our cells, leading to antibody production and other protective immunity. With this production method, there is no need to manufacture the vaccine in cell culture or eggs at factories. Because DNA molecules are shelf stable, the vaccine will not expire at warm temperatures and could be stockpiled at room temperature for years. Using UTMB’s Zika vaccine as a model, the research group showed that the DNA platform worked very efficiently in mice. After a single low dose, the DNA vaccine protected mice from Zika virus infection, mother-to-fetus transmission during pregnancy and male reproductive tract infection and damage.
Prof. Pei-Yong Shi said, “Importantly, this vaccine technology could potentially serve as a universal platform for development of live-attenuated vaccines for many viral pathogens.”
More Information: Jing Zou et al, “A single-dose plasmid-launched live-attenuated Zika vaccine induces protective immunity”, EBioMedicine (2018). DOI: 10.1016/j.ebiom.2018.08.056