Objective:To generate insights into the mechanism of NVP induced hepatotoxicity.Methods:Liver(HepG2)cells were cultured with various concentrations of NVP.This cell line was chosen because it has low expression of cyt...Objective:To generate insights into the mechanism of NVP induced hepatotoxicity.Methods:Liver(HepG2)cells were cultured with various concentrations of NVP.This cell line was chosen because it has low expression of cytochrome P450,allowing evaluation of the effects of NVP rather than specific metabolites.Cytotoxicity was determined using a proliferation assay and cell numbers were monitored using trypan blue exclusion assay for long term culture experiments and apoptosis induction was determined by morphological and biochemical investigation.Results:HepG2 cells treated with the highest concentration of NVP tested(819μM)initially showed a rounded morphology and all cells had died by week three of exposure.Nuclear condensation and fragmentation,increased Annexin V/propidium iodide staining and caspase 9 activation all supported the induction of apoptosis in HepG2 cells in response to NVP treatment.Conclusions:There is a clear induction of apoptosis in response to NVP which suggests that NVP has significant cytotoxicity,over and above any cytotoxicity of metabolites and may contribute directly to patient hepatotoxicity.展开更多
Objective:To identify the candidate protein biomarkers of adult-onset-immunodeficiency(AOID) syndrome using serum proteomics. Methods:Screening and verification phases were performed in the study. A total of 97 serum ...Objective:To identify the candidate protein biomarkers of adult-onset-immunodeficiency(AOID) syndrome using serum proteomics. Methods:Screening and verification phases were performed in the study. A total of 97 serum samples were classified into three groups:AOID patients with opportunistic infections(active AOID),AOID patients without opportunistic infections(inactive AOID),and healthy control. In the screening phase,pooled sera collected from patients and healthy control in each group were separated by 2D-gel electrophoresis,analyzed for differentially expressed proteins and identified for biomarkers using LC/MS. In the verification phase,the protein candidates were selected for confirmation by western blotting. Results:The analysis revealed 35 differentially expressed proteins. Three proteins including haptoglobin,gelsolin,and transthyretin,were selected for verification. The results showed that the levels of haptoglobin in both active and inactive AOID groups were significantly higher than that in the control group,while the levels of gelsolin in the active AOID group were significantly lower than that in the inactive AOID group. The level of transthyretin in the active AOID group was also significantly lower than that in the control group. Conclusions:The comparison of serum proteins between the three groups revealed three candidates which are related to chronic inflammatory diseases. Haptoglobin and transthyretin biomarkers could be applied in clinical assessment for monitor of disease outcome,including for the study of AOID pathogenesis.展开更多
基金supported by The National Research Council of Thailand(NRCT)Office of the Higher Education Commission and Chiang Mai University under the National Research Universities Initiative
文摘Objective:To generate insights into the mechanism of NVP induced hepatotoxicity.Methods:Liver(HepG2)cells were cultured with various concentrations of NVP.This cell line was chosen because it has low expression of cytochrome P450,allowing evaluation of the effects of NVP rather than specific metabolites.Cytotoxicity was determined using a proliferation assay and cell numbers were monitored using trypan blue exclusion assay for long term culture experiments and apoptosis induction was determined by morphological and biochemical investigation.Results:HepG2 cells treated with the highest concentration of NVP tested(819μM)initially showed a rounded morphology and all cells had died by week three of exposure.Nuclear condensation and fragmentation,increased Annexin V/propidium iodide staining and caspase 9 activation all supported the induction of apoptosis in HepG2 cells in response to NVP treatment.Conclusions:There is a clear induction of apoptosis in response to NVP which suggests that NVP has significant cytotoxicity,over and above any cytotoxicity of metabolites and may contribute directly to patient hepatotoxicity.
文摘Objective:To identify the candidate protein biomarkers of adult-onset-immunodeficiency(AOID) syndrome using serum proteomics. Methods:Screening and verification phases were performed in the study. A total of 97 serum samples were classified into three groups:AOID patients with opportunistic infections(active AOID),AOID patients without opportunistic infections(inactive AOID),and healthy control. In the screening phase,pooled sera collected from patients and healthy control in each group were separated by 2D-gel electrophoresis,analyzed for differentially expressed proteins and identified for biomarkers using LC/MS. In the verification phase,the protein candidates were selected for confirmation by western blotting. Results:The analysis revealed 35 differentially expressed proteins. Three proteins including haptoglobin,gelsolin,and transthyretin,were selected for verification. The results showed that the levels of haptoglobin in both active and inactive AOID groups were significantly higher than that in the control group,while the levels of gelsolin in the active AOID group were significantly lower than that in the inactive AOID group. The level of transthyretin in the active AOID group was also significantly lower than that in the control group. Conclusions:The comparison of serum proteins between the three groups revealed three candidates which are related to chronic inflammatory diseases. Haptoglobin and transthyretin biomarkers could be applied in clinical assessment for monitor of disease outcome,including for the study of AOID pathogenesis.
