title: Proteomic identification of peroxiredoxin 6 for host defence against Opisthorchis viverrini infection.
abstract: Opisthorchis viverrini infection causes opisthorchiasis and is a risk factor for cholangiocarcinoma via chronic inflammation. To investigate the mechanism of O. viverrini -induced liver disease, we applied a proteomic approach to examine alterations in hepatic protein levels in O. viverrini -infected hamsters. Two-dimensional gel electrophoresis (2DE) revealed that O. viverrini infection induced upregulation (1.5- to 4.3-fold) of 25 proteins and downregulation (1.5 to 2.5-fold) of 24 proteins compared with uninfected animals. Expression of proteins related to stress response, DNA replication and repair, and cell structure was significantly increased, whereas that of proteins associated with normal liver function, such as metabolism, blood volume maintenance and fatty acid cycle was decreased. Among the upregulated proteins, a 2.7-fold increase in peroxiredoxin 6 (Prdx6), an antioxidant protein, was confirmed by 2DE and immunoblot analysis, Western blot and quantitative PCR. Immunohistochemical analysis showed that Prdx6 expression was observed mainly in the cytoplasm of inflammatory cells. These results suggest that Prdx6 is important for host defence against O. viverrini infection. This study provides basic information for Prdx6 as a potential biomarker and therapeutic target for opisthorchiasis.
authors.affiliation: Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.
authors.forename: J
authors.initials: J
authors.lastname: Khoontawad
authors.forename: C
authors.initials: C
authors.lastname: Wongkham
authors.forename: Y
authors.initials: Y
authors.lastname: Hiraku
authors.forename: P
authors.initials: P
authors.lastname: Yongvanit
authors.forename: S
authors.initials: S
authors.lastname: Prakobwong
authors.forename: T
authors.initials: T
authors.lastname: Boonmars
authors.forename: P
authors.initials: P
authors.lastname: Pinlaor
authors.forename: S
authors.initials: S
authors.lastname: Pinlaor
mesh_terms: D000818:Animals; D015153:Blotting, Western; D006224:Cricetinae; D003593:Cytoplasm / Q000737:chemistry; D015180:Electrophoresis, Gel, Two-Dimensional; D020869:Gene Expression Profiling; D007150:Immunohistochemistry; D008099:Liver / Q000737:chemistry*; D008297:Male; D008647:Mesocricetus; D009889:Opisthorchiasis / Q000276:immunology*; D009891:Opisthorchis / Q000276:immunology*; D054465:Peroxiredoxin VI / Q000276:immunology*; D020543:Proteome / Q000032:analysis*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D020543:Proteome; D054465:Peroxiredoxin VI