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Updated: Apr 12, 2026
05:28
Standard Membrane Feeding Assay for the Detection of Plasmodium falciparum Infection in Anopheles Mosquito Vectors
Published on: May 12, 2022
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Anopheles Midgut FREP1 Mediates Plasmodium Invasion
Genwei Zhang1, Guodong Niu1, Caio M Franca1
1From the Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019.
The Journal of Biological Chemistry
|May 21, 2015
Summary
Mosquitoes’ fibrinogen-related protein 1 (FREP1) anchors malaria parasites to the midgut lining. Targeting FREP1 significantly reduces parasite infection, offering a new strategy to limit malaria transmission.
Area of Science:
- Malariology
- Entomology
- Parasitology
Background:
- Malaria transmission relies on Plasmodium parasites invading the Anopheles mosquito midgut.
- The molecular mechanisms of this invasion are not fully understood.
- Previous studies linked fibrinogen-related protein 1 (FREP1) gene polymorphisms to Plasmodium falciparum infection and FREP1 to mosquito infection.
Purpose of the Study:
- To elucidate the molecular mechanisms of Plasmodium invasion into the Anopheles mosquito midgut.
- To investigate the role of mosquito-expressed fibrinogen-related protein 1 (FREP1) in Plasmodium infection.
Main Methods:
- Investigated FREP1 protein localization and function in Anopheles gambiae mosquitoes.
- Examined FREP1 binding to Plasmodium sexual stages (gametocytes and ookinetes).
- Assessed the impact of FREP1 ablation and antibody targeting on Plasmodium infection levels.
Main Results:
- FREP1 is secreted by the mosquito midgut epithelium and forms tetramers within the peritrophic matrix.
- FREP1 directly binds to Plasmodium gametocytes and ookinetes.
- Ablating FREP1 or using anti-FREP1 antibodies significantly reduced P. falciparum infection in mosquito midguts.
- FREP1 anchors ookinetes to the peritrophic matrix, facilitating invasion.
Conclusions:
- Mosquito-expressed FREP1 is crucial for mediating midgut invasion by multiple Plasmodium species.
- FREP1 anchors parasites to the peritrophic matrix, enabling penetration of the midgut.
- Targeting FREP1 presents a potential strategy to limit malaria transmission by mosquitoes.
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