 |
Journal articles
HTLV-1-induced leukotriene B4 secretion by T cells promotes T cell recruitment and virus propagation.
Abstract : The human T-lymphotropic virus type 1 (HTLV-1) is efficiently transmitted through cellular contacts. While the molecular mechanisms of viral cell-to-cell propagation have been extensively studied in vitro, those facilitating the encounter between infected and target cells remain unknown. In this study, we demonstrate that HTLV-1-infected CD4 T cells secrete a potent chemoattractant, leukotriene B4 (LTB4). LTB4 secretion is dependent on Tax-induced transactivation of the pla2g4c gene, which encodes the cytosolic phospholipase A2 gamma. Inhibition of LTB4 secretion or LTB4 receptor knockdown on target cells reduces T-cell recruitment, cellular contact formation and virus propagation in vitro. Finally, blocking the synthesis of LTB4 in a humanized mouse model of HTLV-1 infection significantly reduces proviral load. This results from a decrease in the number of infected clones while their expansion is not impaired. This study shows the critical role of LTB4 secretion in HTLV-1 transmission both in vitro and in vivo.
Cited literature [61 references]
https://hal-pasteur.archives-ouvertes.fr/pasteur-01545491
Contributor : Philippe Afonso <>
Submitted on : Thursday, June 22, 2017 - 4:05:02 PM
Last modification on : Friday, June 11, 2021 - 2:48:01 PM
Long-term archiving on: : Wednesday, January 10, 2018 - 4:08:33 PM
Contributor : Philippe Afonso <>
Submitted on : Thursday, June 22, 2017 - 4:05:02 PM
Last modification on : Friday, June 11, 2021 - 2:48:01 PM
Long-term archiving on: : Wednesday, January 10, 2018 - 4:08:33 PM
File
ncomms15890.pdf
Publication funded by an institution
Licence
Distributed under a Creative Commons Attribution 4.0 International License