Related Experiment Video
Updated: Jul 10, 2026
Standard Membrane Feeding Assay for the Detection of Plasmodium falciparum Infection in Anopheles Mosquito Vectors
Published on: May 12, 2022
Anopheles gambiae miRNAs as actors of defence reaction against Plasmodium invasion
Flore Winter1, Sonia Edaye, Alexander Hüttenhofer
1Architecture et Réactivité de l'ARN, Université Louis Pasteur, CNRS, Institut de Biologie Moléculaire et Cellulaire, 15 rue Descarte, 67084 Strasbourg, France.
Abstract:
The path Plasmodium takes across the Anopheles midgut constitutes the major bottleneck during the malaria transmission cycle. In the present study, using a combination of shot-gun cloning and bioinformatic analysis, we have identified 18 miRNAs from Anopheles gambiae including three miRNAs unique to mosquito. Twelve of them are expressed ubiquitously across the body, independently of gender, while the other six exhibited an expression pattern restricted to the digestive system. Strikingly, the expression patterns of four miRNAs, including the three unique to mosquito, are affected by the presence of Plasmodium. We also show that knocking down Dicer1 and Ago1 mRNAs led to an increased sensitivity to Plasmodium infection. Altogether, these data support an involvement of miRNAs as new layers in the regulation of Anopheles defence reaction.
Insights
This study identifies 18 microRNAs (miRNAs) in Anopheles gambiae mosquitoes, revealing their role in defense against Plasmodium parasites. Knocking down key miRNA-related genes increased mosquito susceptibility to infection.
Area of Science:
- Molecular Biology
- Genetics
- Parasitology
- Entomology
Background:
- The Anopheles midgut is a critical barrier for Plasmodium parasite development during malaria transmission.
- MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression and are involved in various biological processes.
Purpose of the Study:
- To identify and characterize miRNAs in Anopheles gambiae.
- To investigate the role of Anopheles gambiae miRNAs in the mosquito's response to Plasmodium infection.
Main Methods:
- Shot-gun cloning and bioinformatic analysis were employed to identify miRNAs in Anopheles gambiae.
- Quantitative real-time PCR (qRT-PCR) was used to analyze miRNA expression patterns.
- RNA interference (RNAi) was used to knock down Dicer1 and Ago1 genes.
Main Results:
- Eighteen miRNAs were identified in Anopheles gambiae, including three novel mosquito-specific miRNAs.
- Twelve miRNAs were ubiquitously expressed, while six showed restricted expression in the digestive system.
- The expression of four miRNAs, including the mosquito-specific ones, was altered by Plasmodium infection.
- Knockdown of Dicer1 and Ago1 resulted in increased susceptibility to Plasmodium infection.
Conclusions:
- Anopheles gambiae possesses a unique set of miRNAs, some of which are specifically regulated during Plasmodium infection.
- miRNAs play a significant role in regulating the Anopheles gambiae defense response against Plasmodium parasites.
- These findings highlight miRNAs as a potential target for malaria control strategies.
More Related Videos
15:03Building a Better Mosquito: Identifying the Genes Enabling Malaria and Dengue Fever Resistance in A. gambiae and A. aegypti Mosquitoes
Published on: July 4, 2007
08:24Inoculating Anopheles gambiae Mosquitoes with Beads to Induce and Measure the Melanization Immune Response
Published on: January 12, 2017
Related Concept Videos
01:29Malaria
00:58Symbiosis