Mitochondrial Heat Shock Response Induced by Ectromelia Virus is Accompanied by Reduced Apoptotic Potential in Murine L929 Fibroblasts
| Autor: | Zbigniew Wyżewski, Felix N. Toka, Matylda B. Mielcarska, Justyna Struzik, Marek Niemiałtowski, Lidia Szulc-Dąbrowska, Joanna Szczepanowska, Karolina P. Gregorczyk-Zboroch, Magdalena Bossowska-Nowicka |
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| Rok vydání: | 2019 |
| Předmět: |
Hsp10
Ectromelia virus Protein subunit Immunology Apoptosis Mitochondrion Virus Replication Cofactor Cell Line Mitochondrial Proteins Mice 03 medical and health sciences 0302 clinical medicine Heat shock protein Chaperonin 10 Animals Immunology and Allergy ECTV Ectromelia Infectious Heat shock Immune Evasion Virulence biology Chemistry Chaperonin 60 General Medicine Fibroblasts Hsp60 biology.organism_classification Mitochondria Cell biology Protein Transport Gene Expression Regulation Proto-Oncogene Proteins c-bcl-2 biology.protein Original Article HSP60 Heat-Shock Response 030215 immunology |
| Zdroj: | Archivum Immunologiae et Therapiae Experimentalis |
| ISSN: | 1661-4917 0004-069X |
| Popis: | Poxviruses utilize multiple strategies to prevent activation of extrinsic and intrinsic apoptotic pathways for successful replication. Mitochondrial heat shock proteins (mtHsps), especially Hsp60 and its cofactor Hsp10, are engaged in apoptosis regulation; however, until now, the influence of poxviruses on mtHsps has never been studied. We used highly infectious Moscow strain of ectromelia virus (ECTV) to investigate the mitochondrial heat shock response and apoptotic potential in permissive L929 fibroblasts. Our results show that ECTV-infected cells exhibit mostly mitochondrial localization of Hsp60 and Hsp10, and show overexpression of both proteins during later stages of infection. ECTV infection has only moderate effect on the electron transport chain subunit expression. Moreover, increase of mtHsp amounts is accompanied by lack of apoptosis, and confirmed by reduced level of pro-apoptotic Bax protein and elevated levels of anti-apoptotic Bcl-2 and Bcl-xL proteins. Taken together, we show a positive relationship between increased levels of Hsp60 and Hsp10 and decreased apoptotic potential of L929 fibroblasts, and further hypothesize that Hsp60 and/or its cofactor play important roles in maintaining protein homeostasis in mitochondria for promotion of cell survival allowing efficient replication of ECTV. |
| Databáze: | OpenAIRE |
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