Macleod O.J.S., Bart Jean-Mathieu, MacGregor P., Peacock L., Savill N.J., Hester S., Ravel Sophie, Sunter J.D., Trevor C., Rust S., Vaughan T.J., Minter R., Mohammed S., Gibson W., Taylor M.C., Higgins M.K., Carrington M. (2020). A receptor for the complement regulator factor H increases transmission of trypanosomes to tsetse flies. Nature Communications, 11, art. 1326 [12 p.]. ISSN 2041-1723.
Titre du document
A receptor for the complement regulator factor H increases transmission of trypanosomes to tsetse flies
Année de publication
2020
Auteurs
Macleod O.J.S., Bart Jean-Mathieu, MacGregor P., Peacock L., Savill N.J., Hester S., Ravel Sophie, Sunter J.D., Trevor C., Rust S., Vaughan T.J., Minter R., Mohammed S., Gibson W., Taylor M.C., Higgins M.K., Carrington M.
Source
Nature Communications, 2020,
11, art. 1326 [12 p.] ISSN 2041-1723
Persistent pathogens have evolved to avoid elimination by the mammalian immune system including mechanisms to evade complement. Infections with African trypanosomes can persist for years and cause human and animal disease throughout sub-Saharan Africa. It is not known how trypanosomes limit the action of the alternative complement pathway. Here we identify an African trypanosome receptor for mammalian factor H, a negative regulator of the alternative pathway. Structural studies show how the receptor binds lig and, leaving inhibitory domains of factor H free to inactivate complement C3b deposited on the trypanosome surface. Receptor expression is highest in developmental stages transmitted to thetsetsefly vector and those exposed to blood meals in the tsetse gut. Receptor gene deletion reduced tsetse infection, identifying this receptor as a virulence factor for transmission. This demonstrates how a pathogen evolved a molecular mechanism to increase transmission to an insect vector by exploitation of a mammalian complement regulator.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
;
Sciences du monde animal [080]
Localisation
Fonds IRD [F B010078824]
Identifiant IRD
fdi:010078824
