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RNAi-mediated Gene Knockdown and In Vivo Diuresis Assay in Adult Female Aedes aegypti Mosquitoes
Published on: July 14, 2012
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Trypsin-like Inhibitor Domain (TIL)-Harboring Protein Is Essential for Aedes aegypti Reproduction.
Chinmay Vijay Tikhe1,2, Victor Cardoso-Jaime1,2, Shengzhang Dong1,2
1W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
International Journal of Molecular Sciences
|July 27, 2022
Summary
Cysteine-rich venom protein 379 (CRVP379) is crucial for Aedes aegypti reproduction, with mutations causing severe defects. This finding suggests CRVP379 as a target for mosquito population control.
Area of Science:
- Mosquito biology
- Genetics
- Reproductive physiology
Background:
- Cysteine-rich trypsin inhibitor-like domain (TIL)-harboring proteins are widespread but understudied in vector mosquitoes.
- CRVP379, a TIL domain protein in Aedes aegypti, was previously linked to dengue virus infection.
Purpose of the Study:
- To investigate the biological role of CRVP379 in Aedes aegypti.
- To explore CRVP379's function in mosquito reproduction and arbovirus infection.
Main Methods:
- Gene expression analysis across developmental stages and post-blood feeding.
- CRISPR-Cas9 genome editing to create CRVP379 mutant lines.
- Assessment of reproductive capability and follicular cell morphology in mutant mosquitoes.
Main Results:
- CRVP379 is highly expressed in pupae, testes, and ovaries, with increased ovarian expression post-blood feeding.
- Mutant females exhibited severe reproductive defects and altered follicular cell morphology.
- CRVP379's function may be sexually dimorphic, as male reproductive performance was unaffected in one mutant line.
- No significant difference in dengue virus infection was observed between wild-type and mutant lines.
Conclusions:
- CRVP379 plays a critical role in Aedes aegypti reproductive biology.
- CRVP379's essential role in reproduction makes it a potential target for mosquito population control strategies.
- The study identified potential sexually dimorphic functions of CRVP379 residues.
