Analysis of metabolic activities of cytochrome P450 isoenzyme is a crucial index to study drug/toxicant metabolism, drug-drug interaction, polymorphism and et al. Due to this practice, it is important to use the proper probe substrate and to conduct the experiment under optimal conditions. The validation information in literatures on the most common and newest in vitro probe substrates have been reviewed.

AIM: To establish the technique of precision-cut fibrotic liver slice (PCLS) and grope the optimal cultural conditions for researching the liver xenobiotic metabolism in vitro and the drug interaction. METHODS: Complex factors (higher fat diet, alcohol and CCl 4) were used to make the animal model of liver fibrosis. Fibrotic liver slices were prepared and cultivation system was established. Lactate dehydrogenase (LDH) leakage, glutathione S-transferase (GST) activity and 3[4,5-Dimethythiazole-2-yl]-2,5- diphenyltetrazolium bromide (MTT) reduction were chosen as indexes to assess the viability of the slice in different thickness, medium pH and cultural time. RESULTS: Rats were in earlier hepatic fibrosis after administration for 3 weeks. When the thickness of slices was 300 ?m and medium pH was 7.0, the LDH leakage, GST activity and MTT reduction could maintain on a steady level in 6 h. CONCLUSION: A 300 ?m of thickness, 7.0 of medium pH and 6 h of cultural time are the optimal slicing and culturing conditions for fibrotic liver slice.

Objective To observe the clinical effects of short-term intermittent ganeiclovir treatment on infants with cytomegalovirus (CMV) hepatitis. Methods The clinical data of infants with CMV hepatitis were analyzed retrospectively. The liver functions including total bilirubin (TBil), direct bilirubin (DBil), alanine aminotransferase (ALT), aspartate aminotransferase (AST) and γ-glutamyltransferase (γ-GT) of the patients in treatment group (85 cases) and control group (37 cases) were collected before and after treatment. Meanwhile, the side effects of ganciclovir during treatment were observed. The measurement data were compared by analysis of variance and numeration data were compared by chi-square test. Results After short-term intermittent ganciclovir treatment in treatment group, TBil level was decreased from (109.1±677.8)μmol/L to (62.9±68.1)μmol/L (F=15.34,P<0.01); ALT level was decreased from (160.2±395.3) U/L to (68.1±56.0) U/L (F=4.73, P<0.05). In control group, TBil level was decreased from (94.9±647.4)μmol/L to (49.2±631.5) μmol/L (F=14.80, P<0.01) ; while ALT level was decreased from (131.6±206.2) U/L to (55.3±631.2) U/L (F=3.50, P=0.067). The readmission rate in control group was significantly higher than that in treatment group (21.6% vs 10.6%). Only one case (0.8%) received three times of intermittent ganciclovir treatment. The longest hospitalization time was six weeks. Conclusions Short-term intermittent ganciclovir treatment may be more suitable for infants with CMV hepatitis. There is no obvious side effect observed during the treatment and the hospitalization time can be shortened.

Objective:To investigate the clinical value of the changes of serum complement,immunoglobulin and inflammatory cytokines in children with mycoplasma pneumonia (MP).Methods:60 cases of children with MP infection were collected as MPP group,60 cases of healthy children as control group.The serum levels of complement (C3,C4) and immunoglobulin (IgA,IgG,IgM) were detected by INA,the serum levels of inflammatory cytokines (IL-8,IL-10,IL-13,TNF-α) were detected by ELISA.Results:①The serum levels of IgM,C3,C4,IL-8,TNF-et and IL-13 in MPP group in acute stage were significantly higher than those in the recovery stage and control group (P＜0.05),the levels of IL-8,TNF-et,IL-13 in the recovery stage were significantly higher than those in control group (P＜0.05);the serum levels of IgA,IL-10 in MPP group in acute stage were significantly lower than those in the recovery stage and control group,and these were still significantly lower than the control group (P＜0.05);the IgG in MPP group in acute stage was not significant difference with control group (P＞0.05),but it in recovery stage was significantly higher than the acute stage and the control group (P＜0.05).②The serum levels of IgM,IgG,C3,C4,IL-8,TNF-et and IL-I 3 in MPP group in severe were significantly higher than those in the mild stage and control group (P＜0.05),and the levels of IgM,IL-8,TNF-αt,IL-13 in the severe stage were significantly higher than those in control group (P＜0.05);the serum levels of IgA,IL-10 in MPP group in severe stage were significantly lower than those in the mild stage and control group,and these in mild stage were still significantly lower than the control group (P＜ 0.05).Conclusion:Children with MP infection have a significant cellular and humoral immune dysfunction,the detection of the changes of serum complement,immunoglobulin and inflammatory cytokines is valuable to assessing the disease staging and degree.

Antineoplastic Agents ; therapeutic use ; Autoimmune Diseases ; pathology ; Benzamides ; Cell Differentiation ; Cell Movement ; Cell Survival ; Eosinophilia ; chemically induced ; pathology ; Eosinophils ; cytology ; physiology ; Helminthiasis ; pathology ; Humans ; Hypereosinophilic Syndrome ; drug therapy ; pathology ; Hypersensitivity ; pathology ; Imatinib Mesylate ; Piperazines ; therapeutic use ; Pyrimidines ; therapeutic use

Air Pollutants, Occupational ; analysis ; Ammonium Sulfate ; analysis ; Chromatography, Ion Exchange ; methods ; Workplace

Objective To construct expression vectors of human ribosomal protein S 3(RPS3) and RPS3Ser209 mutant in orcler to investigate the effect of RPS3Ser209 mutant on NF-κB signaling pathway and DNA binding capacity .Methods The vector RPS3-myc was amplified by polymerase chain reaction ( PCR) from the human liver cDNA and subcloned into pcDNA-3.1myc-HisB.RPS3S209A represented mutant RPS3 expression vectors, in which the designated amino acid was mutated to an alanine residue .Dual luciferase reporter gene assay was used to detect the NF-κB transcription activity in HEK293 cells,immunofluorescence to detect RPS3 location, and EMSA to examine NF-κB DNA-binding activity.Results The expression vectors of RPS3-myc and RPS3S209A-myc were constructed.Compared with wild-type RPS3,the nucleus translocation, transactivation activity of NF-κB and DNA binding ability of RPS3S290A were reduced significantly .Conclu-sion The impact of RPS3 on NF-κB signaling pathway depend on its serine 209.

Objective Published literatures on the relationship between IL-13 gene polymorphism and the susceptibility of children to bronchial asthma in China were comprehensively analyzed with the use of Meta-analysis to evaluate this relationship.Methods The data were collected from the Medline database,Ovid database,the Cochrane library,and Chinese Biomedical database,and the references of eligible studies were manually screened.Published data related to case-control studies reporting the link between IL-13 polymorphisms and asthma in Chinese children were retrieved through those database.Meta-analysis was conducted to determine whether the IL-13 gene polymorphisms were associated with asthma.Results Eighteen studies were finally accepted for analysis.There were three studies focusing on C-1 112T polymorphism,and six studies focusing on C + 1923T polymorphism,and fourteen studies focusing on G + 2044A polymorphism.There was no evidence to confirm that the genotypes in position IL-13-1112 C/T were associated with asthma in Chinese children [odds ratio(OR) =1.00,95％ CI 0.82-1.22,P =0.98].The OR of asthma for TT/CC genotypes was 1.15 (95 ％ CI 0.57-2.33,P =0.69) and for CT/CC was 1.01 (95 ％ CI 0.82-1.25,P =0.89).There was significant evidence to confirm that the genotypes in position + 1923 C/T were associated with asthma in Chinese children(OR =1.86,95％ CI 1.29-2.67,P =0.000 9).The OR of asthma for TT/CC genotypes was 2.12 (95 ％ CI 1.27-3.56,P =0.004) and for TC/CC was 1.67 (95％ CI 1.18-2.35,P =0.003).There was no correlation between IL-13 + 2044G/A polymorphism and the susceptibility (OR =1.33,95％ CI 0.94-1.88,P =0.11).The OR of asthma for AA/GG genotypes was 1.30 (95 ％ CI 0.76-2.20,P =0.34) and for AG/GG was 1.24(95％ CI 0.90-1.70,P =0.19).Conclusions IL-13 gene + 1923 TT and TC genotypes should be associated with susceptibility of asthma in Chinese children,and the T allele could increase the risk of asthma.No clear relationship was found between the genotype TT/TC at the IL-13-1112 site and the incidence of asthma of children in China,and so was the genotype AA/AG at the IL-13 +2044 site and the incidence.

Objective To assess the effect of peroxisome proliferator-activated receptor γ (PPARγ) agonist on prostate epithelial cells in vitro.Methods The expression of peroxisome proliferator-activated receptor γ(PPARγ) was studied by immunocytochemistry and immunofluorescence study.The RWPE-1 human prostate epithelial cell line was treated with PPARγ agonist rosiglitazone 100 μmol/L for 48 h.Analysis of apoptosis was performed by Caspase 3/7 activity assay.Mitochondria depolarization was measured by using the potential-sensitive color,JC-1.The expression of apoptosis-related proteins-Bax was investigated by immunohistochemistry.Results PPARγ mainly located in nucleus and perinucleus.RWPE-1 cell line treated with PPARγ agonist rosiglitazone showed higher Caspase 3/7 activity (10636±1032 RLU) than in control (5936±620 RLU),P＜0.01 and significantly upregulated Bax level (8250±694 vs.6017±563)than in control group,P＜0.01.In addition,mitochondrial membrane potential was depolarized in rosiglitazone treated cells.Conclusions PPARmay play important roles in the pathophysiology of BPH.The mechanism might be that PPARγ regulates cell apoptosis.It is suggested that the mitochondrial and Bax pathway might be involved in signaling PPARγ induced cell apoptosis.

Adult ; Female ; Humans ; Male ; Occupational Diseases ; Organometallic Compounds ; poisoning