» Articles » PMID: 26964736

Endogenously-expressed NH2-terminus of Circumsporozoite Protein Interferes with Sporozoite Invasion of Mosquito Salivary Glands

Overview
Journal Malar J
Publisher Biomed Central
Specialty Tropical Medicine
Date 2016 Mar 12
PMID 26964736
Citations 5
Authors
Affiliations
Soon will be listed here.
Abstract

Background: The circumsporozoite protein is the most abundant polypeptide expressed by sporozoites, the malaria parasite stage capable of infecting humans. Sporozoite invasion of mosquito salivary glands prior to transmission is likely mediated by a receptor/ligand-like interaction of the parasites with the target tissues, and the amino (NH2)-terminal portion of CSP is involved in this interaction but not the TSR region on the carboxyl (C)-terminus. Peptides based on the NH2-terminal domain could compete with the parasites for the salivary gland receptors and thus inhibit penetration.

Methods: Peptides based on the NH2-terminus and TSR domains of the CSP from avian or human malaria parasites, Plasmodium gallinaceum and Plasmodium falciparum, respectively, were expressed endogenously in mosquito haemolymph using a transient (Sindbis virus-mediated) or stable (piggyBac-mediated transgenesis) system.

Results: Transient endogenous expression of partial NH2-terminus peptide from P. falciparum CSP in P. gallinaceum-infected Aedes aegypti resulted in a reduced number of sporozoites in the salivary glands. When a transgenic approach was used to express a partial CSP NH2-terminal domain from P. gallinaceum the number of sporozoites in the salivary glands did not show a difference when compared to controls. However, a significant difference could be observed when mosquitoes with a lower infection were analysed. The same result could not be observed with mosquitoes endogenously expressing peptides based on the TSR domain from either P. gallinaceum or P. falciparum.

Conclusion: These results support the conclusion that CSP partial NH2-terminal domain can be endogenously expressed to promote a competition for the receptor used by sporozoites to invade salivary glands, and they could be used to block this interaction and reduce parasite transmission. The same effect cannot be obtained with peptides based on the TSR domain.

Citing Articles

An system for investigation of invasion of the salivary gland of mosquitoes.

Hussien M, Soliman B, Tewfick M, OBrochta D Pathog Glob Health. 2022; 117(3):308-314.

PMID: 35993325 PMC: 10081056. DOI: 10.1080/20477724.2022.2108647.


Genetic sexing strains for the population suppression of the mosquito vector .

Koskinioti P, Augustinos A, Carvalho D, Misbah-Ul-Haq M, Pillwax G, Duran de la Fuente L Philos Trans R Soc Lond B Biol Sci. 2020; 376(1818):20190808.

PMID: 33357054 PMC: 7776939. DOI: 10.1098/rstb.2019.0808.


Important Extracellular Interactions between Plasmodium Sporozoites and Host Cells Required for Infection.

Dundas K, Shears M, Sinnis P, Wright G Trends Parasitol. 2018; 35(2):129-139.

PMID: 30583849 PMC: 6375296. DOI: 10.1016/j.pt.2018.11.008.


Laboratory strains of Aedes aegypti are competent to Brazilian Zika virus.

Costa-da-Silva A, Ioshino R, de Araujo H, Kojin B, Zanotto P, Oliveira D PLoS One. 2017; 12(2):e0171951.

PMID: 28187183 PMC: 5302382. DOI: 10.1371/journal.pone.0171951.


A Comprehensive Analysis of Plasmodium Circumsporozoite Protein Binding to Hepatocytes.

Zhao J, Bhanot P, Hu J, Wang Q PLoS One. 2016; 11(8):e0161607.

PMID: 27560376 PMC: 4999272. DOI: 10.1371/journal.pone.0161607.

References
1.
Jasinskiene N, Coates C, Benedict M, Cornel A, Rafferty C, James A . Stable transformation of the yellow fever mosquito, Aedes aegypti, with the Hermes element from the housefly. Proc Natl Acad Sci U S A. 1998; 95(7):3743-7. PMC: 19907. DOI: 10.1073/pnas.95.7.3743. View

2.
Wang Q, Fujioka H, Nussenzweig V . Exit of Plasmodium sporozoites from oocysts is an active process that involves the circumsporozoite protein. PLoS Pathog. 2005; 1(1):e9. PMC: 1238744. DOI: 10.1371/journal.ppat.0010009. View

3.
James A, Blackmer K, Racioppi J . A salivary gland-specific, maltase-like gene of the vector mosquito, Aedes aegypti. Gene. 1989; 75(1):73-83. DOI: 10.1016/0378-1119(89)90384-3. View

4.
Sinnis P, Nardin E . Sporozoite antigens: biology and immunology of the circumsporozoite protein and thrombospondin-related anonymous protein. Chem Immunol. 2002; 80:70-96. DOI: 10.1159/000058840. View

5.
Dame J, Williams J, McCutchan T, Weber J, Wirtz R, Hockmeyer W . Structure of the gene encoding the immunodominant surface antigen on the sporozoite of the human malaria parasite Plasmodium falciparum. Science. 1984; 225(4662):593-9. DOI: 10.1126/science.6204383. View