VAMP3 and VAMP8 regulate the development and functionality of parasitophorous vacuoles housing Leishmania amazonensis

Séguin, Olivier; Mai, Linh Thuy; Acevedo Ospina, Hamlet Adolfo; Guay-Vincent, Marie-Michèle; Whiteheart, Sydney W; Stäger, Simona ORCID: https://orcid.org/0000-0001-5508-9565 et Descoteaux, Albert ORCID: https://orcid.org/0000-0002-0633-5309 (2022). VAMP3 and VAMP8 regulate the development and functionality of parasitophorous vacuoles housing Leishmania amazonensis Infection and Immunity , vol. 90 , nº 3. pp. 1-16. DOI: 10.1128/iai.00183-21.

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Résumé

To colonize mammalian phagocytic cells, the parasite Leishmania remodels phagosomes into parasitophorous vacuoles that can be either tight-fitting individual or communal. The molecular and cellular bases underlying the biogenesis and functionality of these two types of vacuoles are poorly understood. In this study, we investigated the contribution of host cell Soluble N-ethylmaleimide-sensitive-factor Attachment protein REceptor proteins to the expansion and functionality of communal vacuoles as well as on the replication of the parasite. The differential recruitment patterns of Soluble N-ethylmaleimide-sensitive-factor Attachment protein REceptor to communal vacuoles harboring L. amazonensis and to individual vacuoles housing L. major led us to further investigate the roles of VAMP3 and VAMP8 in the interaction of Leishmania with its host cell. We show that whereas VAMP8 contributes to optimal expansion of communal vacuoles, VAMP3 negatively regulates L. amazonensis replication, vacuole size, as well as antigen cross-presentation. In contrast, neither proteins has an impact on the fate of L. major. Collectively, our data support a role for both VAMP3 and VAMP8 in the development and functionality of L. amazonensis-harboring communal parasitophorous vacuoles.

Type de document:	Article
Informations complémentaires:	article e0018321
Mots-clés libres:	Leishmania; SNARE; cross-presentation; macrophage; parasitophorous vacuole
Centre:	Centre INRS-Institut Armand Frappier
Date de dépôt:	23 juin 2022 02:46
Dernière modification:	20 sept. 2022 04:00
URI:	https://espace.inrs.ca/id/eprint/12445

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