Abstract:
:In the human malaria vector Anopheles gambiae, the gene doublesex (Agdsx) encodes two alternatively spliced transcripts, dsx-female (AgdsxF) and dsx-male (AgdsxM), that control differentiation of the two sexes. The female transcript, unlike the male, contains an exon (exon 5) whose sequence is highly conserved in all Anopheles mosquitoes so far analyzed. We found that CRISPR-Cas9-targeted disruption of the intron 4-exon 5 boundary aimed at blocking the formation of functional AgdsxF did not affect male development or fertility, whereas females homozygous for the disrupted allele showed an intersex phenotype and complete sterility. A CRISPR-Cas9 gene drive construct targeting this same sequence spread rapidly in caged mosquitoes, reaching 100% prevalence within 7-11 generations while progressively reducing egg production to the point of total population collapse. Owing to functional constraint of the target sequence, no selection of alleles resistant to the gene drive occurred in these laboratory experiments. Cas9-resistant variants arose in each generation at the target site but did not block the spread of the drive.
journal_name
Nat Biotechnoljournal_title
Nature biotechnologyauthors
Kyrou K,Hammond AM,Galizi R,Kranjc N,Burt A,Beaghton AK,Nolan T,Crisanti Adoi
10.1038/nbt.4245subject
Has Abstractpub_date
2018-12-01 00:00:00pages
1062-1066issue
11eissn
1087-0156issn
1546-1696pii
nbt.4245journal_volume
36pub_type
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