Human parainfluenza virus type 2 V protein inhibits mitochondrial apoptosis pathway through two ways.

Autor: Saka N; Department of Microbiology, School of Medicine, Wakayama Medical University, Wakayama, Japan. Electronic address: nsaka@wakayama-med.ac.jp., Nishio M; Department of Microbiology, School of Medicine, Wakayama Medical University, Wakayama, Japan. Electronic address: mnishio@wakayama-med.ac.jp., Ohta K; Department of Microbiology, School of Medicine, Wakayama Medical University, Wakayama, Japan. Electronic address: k-ooota@wakayama-med.ac.jp.
Jazyk: angličtina
Zdroj: Virology [Virology] 2024 Jun; Vol. 594, pp. 110053. Date of Electronic Publication: 2024 Mar 11.
DOI: 10.1016/j.virol.2024.110053
Abstrakt: Paramyxoviruses are reported to block apoptosis for their replication, but the mechanisms remain unclear. Furthermore, regulation of mitochondrial apoptosis by paramyxoviruses has been hardly reported. We investigated whether and how human parainfluenza virus type 2 (hPIV-2) counteracts apoptosis. Infection of recombinant hPIV-2 carrying mutated V protein showed higher caspase 3/7 activity and higher cytochrome c release from mitochondria than wild type hPIV-2 infection. This indicates that V protein controls mitochondrial apoptosis pathway. hPIV-2 V protein interacted with Bad, an apoptotic promoting protein, and this interaction inhibited the binding of Bad to Bcl-X L . V protein also bound to 14-3-3ε, which was essential for inhibition of 14-3-3ε cleavage. Our data collectively suggest that hPIV-2 V protein has two means of preventing mitochondrial apoptosis pathway: the inhibition of Bad-Bcl-X L interaction and the suppression of 14-3-3ε cleavage. This is the first report of the mechanisms behind how paramyxoviruses modulate mitochondrial apoptosis pathways.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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