Mosquito Embryo Preparation
Mosquito Embryo Preparation - Related Videos
17:39
Microinjection of A. aegypti Embryos to Obtain Transgenic Mosquitoes
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Cited by 56 •
2007
In this video, Nijole Jasinskiene demonstrates the methodology employed to generate transgenic Aedes aegypti mosquitoes, which are vectors for dengue fever. The techniques for correctly preparing microinjection needles, dessicating embryos, and performing microinjection are demonstrated.
10:58
Hybridization in situ of Salivary Glands, Ovaries, and Embryos of Vector Mosquitoes
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Cited by 24 •
2012
Temporal and spatial gene expression analyses have a crucial role in functional genomics. Whole-mount hybridization in situ is useful for determining the localization of transcripts within tissues and subcellular compartments. Here we outline a hybridization in situ protocol with modifications for specific target tissues in mosquitoes.
06:54
Injection of An. stephensi Embryos to Generate Malaria-resistant Mosquitoes
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Cited by 9 •
2007
Anopheles stephensi mosquitoes are vectors for malaria inhabiting India and throughout Asia. This video demonstrates the technique for performing microinjections of this species with transgenes that will confer resistance to the malaria to the mosquito. Much of the methodology demonstrated in this video is applicable to microinjection techniques of other mosquito species.
03:12
Mosquito Embryo Microinjection: A Technique to Deliver Exogenous DNA into Embryo Yolk of Anopheles Gambiae to Generate Germline Mutations
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2025
In this video, we demonstrate the delivery of gene drive construct into the embryo of Anopheles gambiae mosquito through embryo microinjection technique. This procedure allows for integration of delivered DNA construct, through homologous recombination, into the germline cells to generate transformed mosquito population.
07:45
Preparing and Injecting Embryos of Culex Mosquitoes to Generate Null Mutations using CRISPR/Cas9
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Cited by 5 •
2020
CRISPR/Cas9 is increasingly used to characterize gene function in non-model organisms. This protocol describes how to generate knock-out lines of Culex pipiens, from preparing injection mixes, to obtaining and injecting mosquito embryos, as well as how to rear, cross, and screen injected mosquitoes and their progeny for desired mutations.
FAQs
The chorion is a protective outer layer that must be removed in a controlled manner before many observations or manipulations. Dechorionation exposes the embryo while preparation continues to prioritize viability. The balance matters because excessive or poorly controlled handling could compromise the material being studied, whereas effective removal improves access for microscopy, microinjection, and other analyses.
Controlled dechorionation helps standardize how embryos are exposed and handled across experiments. Consistent treatment supports comparable imaging and manipulation conditions, which strengthens reproducibility when investigators examine embryogenesis or gene function. Because the embryos must remain viable, dechorionation is not simply a cleaning step; it is a condition that directly influences whether downstream experiments produce interpretable results.
A suitable medium and deliberate orientation place the embryo in a stable, accessible position for the intended analysis. This arrangement can improve the quality and consistency of microscopic views and create workable access for microinjection. The best setup therefore depends on the planned observation or manipulation, while preserving embryo viability remains an essential preparation criterion.
Utility depends on maintaining viability while achieving adequate cleaning, positioning, and accessibility. Preparation that varies in dechorionation, mounting, or orientation can produce inconsistent images or complicate experimental manipulation. A reproducible workflow reduces these sources of variation, making it easier to compare developmental observations, genetic experiments, and physiological analyses across embryos or experimental groups.
The workflow begins with collecting embryos, followed by cleaning and controlled removal of the chorion. Embryos are then mounted in a suitable medium and positioned for the planned observation or manipulation. Depending on the study, the prepared material proceeds to microscopy, microinjection, or another analysis. Each stage supports access while the overall process preserves viability.
Prepared embryos are useful when researchers need to examine early development or manipulate embryos for biological analysis. Applications include studying embryogenesis, investigating gene function, and analyzing mosquito physiology. The approach also supports work on traits relevant to disease-vector biology, allowing early developmental material to connect cellular or genetic findings with broader biological questions.