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Peroxiredoxin-1 from Schistosoma japonicum functions as a scavenger against hydrogen peroxide but not nitric oxide.
- Source :
-
Molecular and biochemical parasitology [Mol Biochem Parasitol] 2009 Mar; Vol. 164 (1), pp. 26-31. Date of Electronic Publication: 2008 Nov 12. - Publication Year :
- 2009
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Abstract
- Three peroxiredoxins (Prxs) are expressed during most of the developmental stages in the schistosome. Prx-1 is localized on the surface of the schistosomula and adults of Schistosoma japonicum, while Prx-2 is localized in the sub-tegumental tissues, parenchyma, vitelline glands, and gut epithelium, but not on the surface of the worms. We applied RNA interference techniques to suppress the specific genes of S. japonicum Prxs. Schistosomula of S. japonicum were cultured together with long-dsRNA encoding Prx-1 and Prx-2 of S. japonicum (the soaking method). The transcription level of each Prx gene was reduced by an RNA interference (RNAi)-mediated effect specifically. Although neither Prx was the essential protein for survival of S. japonicum schistosomula, Prx-1 dsRNA-treated larvae were susceptible to hydrogen peroxide. Moreover, these larvae were also susceptible to t-butyl hydroperoxide and cumene-hydroperoxide. However, the knockdown of neither Prx-1 nor Prx-2 influenced the resistance against nitric oxide generated from DETA/NO. Prx-1 may work as a scavenger against reactive oxygen species (ROS) generated outside of the schistosomes to prevent the oxidation of the bodies and/or the attack by immune cells producing the ROS. These findings suggest that Prx-1 may become a novel target of drugs and vaccines for schistosomiasis.
- Subjects :
- Animals
Benzene Derivatives pharmacology
Free Radical Scavengers metabolism
Gene Expression Regulation drug effects
Nitric Oxide pharmacology
Parasitic Sensitivity Tests
RNA Interference
RNA, Double-Stranded pharmacology
Schistosoma japonicum drug effects
Schistosoma japonicum genetics
Survival Analysis
tert-Butylhydroperoxide pharmacology
Hydrogen Peroxide metabolism
Nitric Oxide metabolism
Peroxiredoxins metabolism
Schistosoma japonicum metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 0166-6851
- Volume :
- 164
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Molecular and biochemical parasitology
- Publication Type :
- Academic Journal
- Accession number :
- 19041905
- Full Text :
- https://doi.org/10.1016/j.molbiopara.2008.11.002