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Inhibition of Plasmodium falciparum clag9 gene function by antisense RNA
D L Gardiner1, D C Holt, E A Thomas
1Menzies School of Health Research, Casuarina 0812, Northern Territory 0812, Darwin, Australia. don@menzies.edu.au
Molecular and Biochemical Parasitology
|September 16, 2000
Summary
Antisense RNA effectively inhibits Plasmodium falciparum clag9 gene function, reducing cytoadherence. This novel method offers a valuable tool for malaria research and transfection technology.
Area of Science:
- Malaria research
- Parasitology
- Molecular biology
Background:
- The clag9 gene in Plasmodium falciparum is crucial for cytoadherence to CD36.
- Targeted gene disruption has previously confirmed clag9's essential role.
Purpose of the Study:
- To investigate the inhibition of clag9 function using an antisense RNA vector.
- To establish an alternative method to gene disruption for studying gene function in Plasmodium falciparum.
Main Methods:
- Transfection of a clag9 antisense construct into Plasmodium falciparum clone 3D7.
- Culture of transfected cells in the presence of pyrimethamine.
- Assessment of cytoadherence to C32 melanoma cells.
Main Results:
- A 15-fold reduction in cytoadherence to C32 melanoma cells was observed in the antisense RNA expressing line compared to controls.
- Reversion to wildtype phenotype upon removal of the introduced plasmid confirmed the specificity of the antisense effect.
Conclusions:
- Antisense RNA technology provides a viable alternative to gene disruption for inhibiting gene function in Plasmodium falciparum.
- This approach offers a valuable new tool for malaria transfection technology and functional gene analysis.