Dsrna Preparation
Dsrna Preparation - Related Videos
02:37
Detection of Zika Viral dsRNA Replication Intermediates Using Immunocytochemistry
0 Views •
2026
Source: Contreras, D., et al. Zika Virus Infectious Cell Culture System and the In Vitro Prophylactic Effect of Interferons. J. Vis. Exp. (2016)The video demonstrates the detection of Zika viral dsRNA intermediates in infected epithelial cells using immunocytochemistry. Infected cells are fixed and then blocked with a blocking solution. The primary and secondary antibodies are added. The nuclei are stained with a fluorescent dye. The labeled viral dsRNA is then seen under a fluorescence...
03:24
RNAi Plating for C. elegans Feeding: A Technique to Induce Target dsRNA Expression in E. coli
0 Views •
2023
This video describes the principles behind RNAi treatment in C. elegans and demonstrates a protocol to knockdown lin-35 in a transgenic worm strain.
04:24
Injection of dsRNA into Female A. aegypti Mosquitos
0 Views •
Cited by 8 •
2007
Reverse genetic approaches have proven extremely useful for determining which genes underly resistance to vector pathogens in mosquitoes. This video protocol illustrates a method used by the James lab to inject dsRNA into female A. aegypti mosquitoes, which harbor the dengue virus. The technique for calibrating injection needles, manipulating the injection setup, and injecting dsRNA into the thorax is illustrated.
08:30
RNAi Interference by dsRNA Injection into Drosophila Embryos
0 Views •
Cited by 6 •
2011
RNA interference has been proven very effective to analyze gene function in Drosophila tracheal development. A detailed protocol used by Jiang lab to inject dsRNA into fly embryos to knockdown gene expression is illustrated. This technique has the potential for screening genes required for tissue and organ development in Drosophila.
08:41
Reproducible dsRNA Microinjection and Oviposition Bioassay in Mosquitoes and House Flies
0 Views •
Cited by 5 •
2018
This protocol describes a microinjection methodology that we have standardized and used for several years to deliver specific quantities of nucleic acids directly to the hemolymph of mosquitoes and house flies. This protocol results in minimal injection mortality and allows dose correlated measurements of fecundity.
FAQs
The DNA templates provide the sequence information for two complementary RNA strands. During preparation, these strands are transcribed separately and then allowed to anneal, meaning they pair with one another to form a double-stranded product. This sequence complementarity is central to producing dsRNA suitable for sequence-specific gene-silencing experiments and investigations of gene function.
These properties can influence both experimental specificity and the biological effects observed after dsRNA application. Sequence determines the intended genetic target, while length and concentration affect the prepared material delivered to a system. Purity helps ensure that responses reflect the dsRNA rather than residual DNA, proteins, enzymes, or incomplete transcripts.
A cleaned product should be separated from DNA templates, proteins, enzymes, and incomplete RNA transcripts generated during the process. Removing these components improves control over the material used in biological experiments. This purification step is important when researchers need to interpret gene-silencing, antiviral, or innate immune responses as effects associated with the prepared dsRNA.
A typical workflow begins with DNA templates that support transcription of complementary RNA strands. The resulting strands are then combined under conditions that allow them to anneal. Subsequent purification removes DNA, proteins, enzymes, and incomplete transcripts, producing a cleaner dsRNA preparation. Researchers then evaluate its relevant quality properties before using it in controlled experiments.
Quality control focuses on whether the preparation has suitable purity, length, concentration, and sequence. These measurements help establish that the material is sufficiently clean, appropriately sized, present at a usable amount, and directed toward the intended target. Consistent assessment supports more reliable comparisons among experiments and helps explain differences in observed biological effects.
Prepared dsRNA supports experiments that trigger sequence-specific gene silencing and clarify the functions of selected genes. It also provides a tool for examining antiviral responses and innate immune responses in cells or organisms. Because these applications depend on controlled biological effects, researchers must match the preparation's sequence and quality characteristics to the question being studied.