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- W2026127130 abstract "A chloroplast-like organelle is present in many species of the Apicomplexa phylum. We have previously demonstrated that the plastid organelle of Plasmodium falciparum is essential to the survival of the blood-stage malaria parasite in culture. One known function of the plastid organelle in another Apicomplexan, Toxoplasma gondii, involves the formation of the parasitophorous vacuole. The effects of interruption of plastid function on sporozoites and sexual-stage parasites have not been investigated. In our previous studies of the effects of thiostrepton, a polypeptide antibiotic from streptococcus spp., on erythrocytic schizongony of the human malaria P. falciparum, we found that this antibiotic appears to interact with the guanosine triphosphatase (GTPase) binding domain of the organellar large subunit ribosomal RNA, as it does in bacteria. We investigate here the effects of this drug on life-cycle stages of the malaria parasite in vivo. Preincubation of mature infective sporozoites with thiostrepton has no observable effect on their infectivity. Sporozoite infection both by mosquito bite and sporozoite injection was prevented by pretreatment of mice with thiostrepton. Thiostrepton eliminates infection with erythrocytic forms of Plasmodium berghei in mice. Clearance of infected red blood cells follows the delayed kinetics associated with drugs that interact with the apicoplast. Thiostrepton treatment of infected mice reduces transmission of parasites by more than ten-fold, indicating that the plastid has a role in sexual development of the parasite. These results indicate that the plastid function is accessible to drug action in vivo and important to the development of both sexual and asexual forms of the parasite." @default.
- W2026127130 created "2016-06-24" @default.
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- W2026127130 date "2000-06-01" @default.
- W2026127130 modified "2023-09-27" @default.
- W2026127130 title "Effects of interruption of apicoplast function on malaria infection, development, and transmission" @default.
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- W2026127130 doi "https://doi.org/10.1016/s0166-6851(00)00226-7" @default.
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