RESUMO
Objective To evaluate the diagnostic value of seven autoantibodies in the differential diagnosis of lung cancer patients. Methods The serum levels of seven autoantibodies p53, PGP9.5, SOX2, GAGE7, GBU4-5, MAGEA1 and CAGE were detected by ELISA in 122 subjects, which include 65 extrapulmonary tumors, 20 benign lung diseases, 3 small cell lung cancers, 20 physical examination subjects and 14 non-small cell lung cancers. Subsequently, the results were statistically analyzed by SPSS. Results The subjects were divided into five sub-groups, included extrapulmonary tumors, benign pulmonary lesions, small cell lung cancer, physical examination and non-small cell lung cancer subgroup. p53, SOX2, GBU4-5 and MAGEA1 in small cell cancer subgroup had significantly higher expression levels. Subjects were categorized differently using a ROC curve for statistical analy-sis. The results showed that p53 (AUC=0.664, P＜0.05) was significantly higher in lung cancer group than an-other group. GBU4-5 (AUC=0.639, P＜0.05) and the combination of the seven indicators (AUC=0.635,P＜0.05) had a certain diagnostic value for differential diagnosis of the non-malignant tumor group and the tumor group. MAGEA1, CAGE, PGP9.5, SOX2 and the combination of the seven indexes(AUC＞0.8,P＜0.05)had a high value in the differential diagnosis of small cell lung cancer group and another group. MAGEA1 ( AUC =0.333,P＜0.05) had some value in the differential diagnosis of the physical examination group and another group. p53 (AUC=0.33), PGP9.5 (AUC=0.355), GBU4-5(AUC=0.280),CAGE(AUC=0.341) and seven indi-cators combined detection( AUC =0.731 ) had certain value in the differential diagnosis of benign lung diseases group and another group. Conclusion According to the different groups, the detection of seven autoantibodies and their combined detection have a certain value for differential diagnosis of lung cancer.
RESUMO
The aim of this study was to determine the effects of the aqueous extract of Salvia miltiorrhiza Bge (danshen in Chinese) on the pharmacokinetics of diazepam and on liver microsomal cytochrome P450 enzyme activity in rats. Rats (n = 5) were pretreated with danshen extract (100 mg kg(-1) per day, p.o.) for 15 consecutive days. Control rats (n = 5) received saline at the same time. Each rat was then administered a single oral dose of 15 mg kg(-1) diazepam. The pharmacokinetic parameters of diazepam were significantly different between the two groups. In the danshen pretreated group, the maximum concentration of diazepam and the area under the plasma concentration-time curve were reduced to about 72.7% and 44.4%, respectively, while the total body clearance was markedly increased by 2-fold. To help explain the results, liver microsomal suspensions were obtained from rats that were randomly divided into the control group (n = 10), and the low- (20 mg kg(-1) for 15 days, p.o., n = 10) and high-dose groups (100 mg kg(-1) for 15 days, p.o., n = 10) pretreated with danshen extract. Compared with the control rats, the microsomal protein content, cytochrome P450 enzyme level and erythromycin N-demethylase activity of pretreated rats were significantly increased. These results indicate that danshen extract can stimulate the activity of cytochrome P450 isoforms, and changes in the pharmacokinetics of diazepam resulting from danshen extract are related to an increase in metabolic activity of cytochrome P450.
