机构:
Sanaria Inc, Rockville, MD 20850 USA
USN, Med Res Ctr, US Mil Malaria Vaccine Program, Silver Spring, MD 20910 USASanaria Inc, Rockville, MD 20850 USA
Hoffman, Stephen L.
[1
,3
]
机构:
[1] Sanaria Inc, Rockville, MD 20850 USA
[2] Prot Potential LLC, Rockville, MD 20850 USA
[3] USN, Med Res Ctr, US Mil Malaria Vaccine Program, Silver Spring, MD 20910 USA
We are developing a radiation attenuated Plasmodium falciparum sporozoite (PfSPZ) malaria vaccine. An important step was to determine the minimum dose of irradiation required to adequately attenuate each sporozoite. This was studied in the Plasm odium yoelii rodent model system. Exposure to 100 Gy completely attenuated P. yoelii sporozoites (PySPZ). Next we demonstrated that immunization of mice intravenously with 3 doses of 750 PySPZ that had received 200 Gy, double the radiation dose required for attenuation, resulted in 100% protection. These results support the contention that a radiation attenuated sporozoite vaccine for malaria will be safe and effective at a range of radiation doses. (C) 2008 Elsevier Ltd. All rights reserved.