ABSTRACT
@#At present , methamphetamine has become a major hidden danger in global public health safety. In order to judge methamphetamine addicts and methamphetamine abstainers more scientifically and reliably, this study analyzed the endogenous metabolites in plasma, serum and urine of methamphetamine addicts, methamphetamine abstainers and healthy volunteers by highly sensitive high-throughput liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOF-MS) analytical instrument. The obtained metabolomic data were processed by univariate analysis (t-test) and multivariate analysis (PLS-DA and OPLS-DA) and eligible potential biomarkers were then screened.The identified biomarkers set enrichment analysis to find the connection between metabolites and metabolic pathways.Multivariate statistical results showed that methamphetamine acute group, recovery group and healthy group were clearly separated.3, 18 and 6 regulated metabolites were identified in serum, plasma and urine, respectively, suggesting that lipid metabolism was abnormal in methamphetamine acute group, and that fatty acid metabolism, sulfate/sulfite metabolism and sex hormone metabolism were abnormal in methamphetamine recovery group.The selected potential biomarkers in this study provide the possibility for scientific judgment of the clinical stage of methamphetamine detoxification.
ABSTRACT
Objective To detect the changes in the immune function of opioid-dependent subjects during the withdrawal stage through the administration of Jitai tablet.Methods Subjects were treated as Jitai tablet alone,Jitai tablet plus buprenorphine and placebo,in a randomized,double-blind,placebo-controlled trial.Before and after the 14th day of withdrawal,levels of immunoglobulin (IgM,IgA,IgG),T cell subsets (CD3+,CD4+,CD8+,CD4+/CD8+) and cytokines (IL-2,IFN-γ,IL-4,IFN-γ/IL-4) were detected.Results Compared with healthy people,immunity function before withdrawal among the opioid abusers showed higher levels of IgM,IL-2,IFN-γ,IL-4 and lower level of CD3+ T,as (1.67 ± 0.87) g/L,(14.44 ± 13.50)％,(20.23 ± 15.10)％,(1.97 ± 1.59)％,(47.01 ± 13.62)％,respectively,with difference statistically significant (P＜0.05).There was no big difference of other immunity indicators between the two groups (P＞0.05).At the 14th day of withdrawal in placebo group,levels of IL-4 returned to normal while IFN-γ/IL-4 ratio increased by 3.43 times (P＜0.05).Levels of IgA,IgG,CD4+ and CD4+/CD8+ ratio fluctuated within normal range.There were no significant changes in other immunity indicators (P＞0.05).Compared with placebo group,fluctuation of IgG and IgM decreased in Jitai group during withdrawal period,together with a normal level of IgM at the 14th day.Level of IL-4 abnormally rose up by 0.54 times in Jitai tablet plus buprenorphine group,while IFN-γ/IL-4 ratio been switched back at the 14th day of withdrawal.Other immune indicators were not affected by medical interventions.Conclusion We noticed that certain impairment of the immune function might be restored by Jitai tablet during the withdrawal period.
ABSTRACT
Objective To detect the changes in the immune function of opioid-dependent subjects during the withdrawal stage through the administration of Jitai tablet.Methods Subjects were treated as Jitai tablet alone,Jitai tablet plus buprenorphine and placebo,in a randomized,double-blind,placebo-controlled trial.Before and after the 14th day of withdrawal,levels of immunoglobulin (IgM,IgA,IgG),T cell subsets (CD3+,CD4+,CD8+,CD4+/CD8+) and cytokines (IL-2,IFN-γ,IL-4,IFN-γ/IL-4) were detected.Results Compared with healthy people,immunity function before withdrawal among the opioid abusers showed higher levels of IgM,IL-2,IFN-γ,IL-4 and lower level of CD3+ T,as (1.67 ± 0.87) g/L,(14.44 ± 13.50)％,(20.23 ± 15.10)％,(1.97 ± 1.59)％,(47.01 ± 13.62)％,respectively,with difference statistically significant (P＜0.05).There was no big difference of other immunity indicators between the two groups (P＞0.05).At the 14th day of withdrawal in placebo group,levels of IL-4 returned to normal while IFN-γ/IL-4 ratio increased by 3.43 times (P＜0.05).Levels of IgA,IgG,CD4+ and CD4+/CD8+ ratio fluctuated within normal range.There were no significant changes in other immunity indicators (P＞0.05).Compared with placebo group,fluctuation of IgG and IgM decreased in Jitai group during withdrawal period,together with a normal level of IgM at the 14th day.Level of IL-4 abnormally rose up by 0.54 times in Jitai tablet plus buprenorphine group,while IFN-γ/IL-4 ratio been switched back at the 14th day of withdrawal.Other immune indicators were not affected by medical interventions.Conclusion We noticed that certain impairment of the immune function might be restored by Jitai tablet during the withdrawal period.
ABSTRACT
A low energy germanium (LEGe) detector was calibrated by Monte Carlo simulation and experiment with radionuclides. At first, Monte Carlo simulations were carried out for calibrating the detector for parallel incident photons in the 1.5-180keV energy range. Then, a set of radionuclides emitting low-energy X- or γ-rays was used to calibrate the detector for quasi-parallel incident photons, which provided experimental values to compare with the simulated ones. The results show good agreement with a largest relative discrepancy of -1.8%.
