Name: protocol for rnai assays in adult mosquitoes (a. gambiae)
Uploaded: 2007-07-04T00:00:00
Description: Watch this Scientific Journal Video about Protocol for RNAi Assays in Adult Mosquitoes A. gambiae at JoVE.com

<p class="jove_content">RNAi-mediated gene silencing in mosquitoes requires prior preparation and purification of specific dsRNAs that target the gene of interest. For dsRNA synthesis, we recommend the Ambion Megascript kit which makes use of a T7 RNA polymerase-mediated <em>in vitro </em>transcription reaction. For dsRNA purification, we recommend the Qiagen RNeasy kit. Samples of dsRNA should be quantified and adjusted to 3 &mu;g/&mu;L in water. Other materials you will need include: fine-tipped forceps, glass slide, glass microcapillary need...

<ol>
	<li>Boisson, ., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> , (2006).</li><li>Blandin, ., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> , (2002).</li></ol>

<p class="jove_content">Efficiency of gene silencing is highly variable and depends on a number of factors including transcript and protein turn-over rates, and dsRNA uptake efficiency by cells and organs. We have found that silencing begins as early as 1 day post injection and can last up to 6 days post injection. Use transcript and protein detection methods such as quantitative PCR and Western blotting to validate silencing.</p>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
		
		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>Megascript</td>
<td>kit</td>
<td>Ambion</td>
<td>&nbsp;</td>
<td>for dsRNA synthesis; T7 RNA polymerase-mediated in vitro transcription reaction</td>
</tr>
<tr>
<td>RNeasy</td>
<td>&nbsp;</td>
<td>Qiagen</td>
<td>&nbsp;</td>
<td>For dsRNA purification</td>
</tr>
<tr>
<td>dsRNA</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>should be quantified and adjusted to 3 &#x03BC;g/ &#x03BC;L in water</td>
</tr>
<tr>
<td>fine-tipped forceps</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>glass slide</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>glass microcapillary needles</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>microinjector</td>
<td>&nbsp;</td>
<td>Drummond</td>
<td>Nanoject II</td>
<td>&nbsp;</td>
<tr>
<td>light microscope</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>mounted above a cold block</td>
</tr>
<tr>
<td>Petri dish</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>covered, glass</td>
</tr>
<tr>
<td>paper towels</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>10% sucrose</td>
<td>food</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>A. gambiae</td>
<td>Animal</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>mosquitos</td>
</tr>		</tbody>
		</table>
		</div>
	

protocol for rnai assays in adult mosquitoes (a. gambiae)

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 Dimopoulos lab to inject dsRNA into Anopheles gambiae mosquitoes, which harbor the malaria parasite.  The technique manipulating the injection setup and injecting dsRNA into the thorax is illustrated.

Watch this Scientific Journal Video about Protocol for RNAi Assays in Adult Mosquitoes A. gambiae at JoVE.com

Protocol for RNAi Assays in Adult Mosquitoes A. gambiae

<p class="jove_content">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 Dimopoulos lab to inject dsRNA into Anopheles gambiae mosquitoes, which harbor the malaria parasite.  The technique manipulating the injection setup and injecting dsRNA into the thorax is illustrated.</p>

Protocol for RNAi Assays in Adult Mosquitoes (A. gambiae)

Reverse genetic approaches have proven extremely useful for determining  which genes underly resistance to vector pathogens in mosquitoes.  This video ...

Research

JoVE Journal

Biology

Protocol for Dengue Infections in Mosquitoes (A. aegypti) and Infection Phenotype Determination

Protocol for Dengue Infections in Mosquitoes A. aegypti and Infection Phenotype Determination

The purpose of this procedure is to infect the Aedes mosquito with dengue virus in a laboratory condition and examine the infection level and dynamic of ...

Protocol for Mosquito Rearing (A. gambiae)

Protocol for Mosquito Rearing A. gambiae

This protocol describes mosquito rearing in the insectary. The insectary rooms are maintained at 28&deg;C and ~80% humidity, with a 12 hr. day/night ...

Protocol for Plasmodium falciparum Infections in Mosquitoes and Infection Phenotype Determination

Once a gene is identified as potentially refractory for malaria, it must be evaluated for its role in preventing Plasmodium infections within the ...

Building a Better Mosquito: Identifying the Genes Enabling Malaria and Dengue Fever Resistance in A. gambiae and A. aegypti Mosquitoes

In this interview, George Dimopoulos focuses on the physiological mechanisms used by mosquitoes to combat Plasmodium falciparum and dengue virus ...

MISSION esiRNA for RNAi Screening in Mammalian Cells

RNA interference (RNAi) is a basic cellular mechanism for the control of gene expression. RNAi is induced by short double-stranded RNAs also known as ...

Bacterial Delivery of RNAi Effectors: Transkingdom RNAi

RNA interference (RNAi) represents a high effective mechanism for specific inhibition of mRNA expression. Besides its potential as a powerful laboratory ...

RNAi-mediated Gene Knockdown and <em>In Vivo</em> Diuresis Assay in Adult Female <em>Aedes aegypti</em> Mosquitoes

RNAi-mediated Gene Knockdown and In Vivo Diuresis Assay in Adult Female Aedes aegypti Mosquitoes

This video protocol demonstrates an effective technique to knockdown a particular gene in an insect and conduct a novel bioassay to measure excretion ...

Endurance Training Protocol and Longitudinal Performance Assays for <em>Drosophila melanogaster</em>

Endurance Training Protocol and Longitudinal Performance Assays for Drosophila melanogaster

One of the most pressing problems facing modern medical researchers is the surging levels of obesity, with the consequent increase in associated disorders ...

A Multi-detection Assay for Malaria Transmitting Mosquitoes

The Anopheles gambiae species complex includes the major malaria transmitting mosquitoes in Africa. Because these species are of such medical importance, ...

RNAi Trigger Delivery into <em>Anopheles gambiae</em> Pupae

RNAi Trigger Delivery into Anopheles gambiae Pupae

RNA interference (RNAi), a naturally occurring phenomenon in eukaryotic organisms, is an extremely valuable tool that can be utilized in the laboratory ...