The abstract is read at the publisher; the summary is JClub's.
HF-RfxCas13d integrated at the dispensable pfs47 locus enables constitutive cytosolic RNA-guided depletion of endogenous mRNAs in Plasmodium falciparum, achieving 41%–76% knockdown across three loci.
- Why it matters: Functional genomics in P. falciparum is limited by the lack of an endogenous RNA interference pathway and by slow, direct conditional locus engineering. A programmable post-transcriptional alternative is needed to speed target validation.
- What they did: A HF-RfxCas13d expression cassette was integrated using CRISPR-SpyCas9 at pfs47 to create a stable, marker-free line with no impairment of intraerythrocytic asexual growth. Episomal single or dual gRNAs were delivered to deplete target mRNAs, including ap2-g.
- The result: Episomal gRNAs produced significant mRNA depletion (41%–76%) at atp4, ap2-exp, and ap2-g, and ap2-g depletion impaired sexual differentiation in committed parasites, reducing the Sexual Conversion Rate by 70%. This supports a flexible, scalable, non-locus-modifying addition to the genetic toolbox for functional genomics and drug target identification.
The findingWhy it mattersWhat they didThe result
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