AIM To assess the effects of hepatitis E virus(HEV) on the production of type Ⅰ interferons(IFNs) and determine the underlying mechanisms.METHODS We measured the production of interferon(IFN)-alpha and-beta(-α/β) i...AIM To assess the effects of hepatitis E virus(HEV) on the production of type Ⅰ interferons(IFNs) and determine the underlying mechanisms.METHODS We measured the production of interferon(IFN)-alpha and-beta(-α/β) in genotype 3 HEV-infected C3 A cells at different time points(0, 8, 12, 24, 48, 72 and 120 h) by enzyme-linked immunosorbent assay(ELISA). The expression levels of IFN-stimulated gene(ISG)15 in HEVinfected C3A cells at different time points were tested by western blotting. The plasmid-expressing open reading frame 3(ORF3) or control plasmids(green fluorescent protein-expressing) were transfected into C3A cells, and the levels of IFN-α/β and ISG15 were evaluated, respectively. Furthermore, the plasmid-expressing ISG15 or small interfering RNA-inhibiting ISG15 was transfected into infected C3A cells. Then, the production of IFN-α/β was also measured by ELISA.RESULTS We showed that genotype 3 HEV could enhance the production of IFN-α/β and induce elevation of ISG15 in C3A cells. HEV ORF3 protein could enhance the production of IFN-α/β and the expression of ISG15. Additionally, ISG15 silencing enhanced the production of IFN-α/β. Overexpression of ISG15 resulted in the reduction of IFN-α/β.CONCLUSION HEV may promote production of IFN-α/β and expression of ISG15 via ORF3 in the early stages, and increased ISG15 subsequently inhibited the production of IFN-α/β.展开更多
TRIM25 is emerging as a central factor in breast cancer due to its regulation and function.In particular,it has been shown that:(1)Estrogens modulate TRIM25 gene expression;(2)TRIM25 has activity as an E3-ligase enzym...TRIM25 is emerging as a central factor in breast cancer due to its regulation and function.In particular,it has been shown that:(1)Estrogens modulate TRIM25 gene expression;(2)TRIM25 has activity as an E3-ligase enzyme for ubiquitin;and(3)TRIM25 is also an E3 ligase for interferon-stimulated gene 15 protein in the ISGylation system.Consequently,the proteome of mammary tissue is affected by TRIM25-associated pathways,involved in tumor development and metastasis.Here,we discuss the findings on the mechanisms involved in regulating TRIM25 expression and its functional relevance in breast cancer progression.These studies suggest that TRIM25 may be a biomarker and a therapeutic target for breast cancer.展开更多
基金Supported by the National Natural Science Foundation of China,No.81570540
文摘AIM To assess the effects of hepatitis E virus(HEV) on the production of type Ⅰ interferons(IFNs) and determine the underlying mechanisms.METHODS We measured the production of interferon(IFN)-alpha and-beta(-α/β) in genotype 3 HEV-infected C3 A cells at different time points(0, 8, 12, 24, 48, 72 and 120 h) by enzyme-linked immunosorbent assay(ELISA). The expression levels of IFN-stimulated gene(ISG)15 in HEVinfected C3A cells at different time points were tested by western blotting. The plasmid-expressing open reading frame 3(ORF3) or control plasmids(green fluorescent protein-expressing) were transfected into C3A cells, and the levels of IFN-α/β and ISG15 were evaluated, respectively. Furthermore, the plasmid-expressing ISG15 or small interfering RNA-inhibiting ISG15 was transfected into infected C3A cells. Then, the production of IFN-α/β was also measured by ELISA.RESULTS We showed that genotype 3 HEV could enhance the production of IFN-α/β and induce elevation of ISG15 in C3A cells. HEV ORF3 protein could enhance the production of IFN-α/β and the expression of ISG15. Additionally, ISG15 silencing enhanced the production of IFN-α/β. Overexpression of ISG15 resulted in the reduction of IFN-α/β.CONCLUSION HEV may promote production of IFN-α/β and expression of ISG15 via ORF3 in the early stages, and increased ISG15 subsequently inhibited the production of IFN-α/β.
文摘TRIM25 is emerging as a central factor in breast cancer due to its regulation and function.In particular,it has been shown that:(1)Estrogens modulate TRIM25 gene expression;(2)TRIM25 has activity as an E3-ligase enzyme for ubiquitin;and(3)TRIM25 is also an E3 ligase for interferon-stimulated gene 15 protein in the ISGylation system.Consequently,the proteome of mammary tissue is affected by TRIM25-associated pathways,involved in tumor development and metastasis.Here,we discuss the findings on the mechanisms involved in regulating TRIM25 expression and its functional relevance in breast cancer progression.These studies suggest that TRIM25 may be a biomarker and a therapeutic target for breast cancer.
