Résumé
Chronic hepatitis C has become a serious public health issue around the world.In recent years,with the development of pharmacotherapy for hepatitis C,it may be possible to cure hepatitis C.With reference to the epidemic status of hepatitis C and the advantages and side effects of conventional standard therapy (pegylated interferon plus ribavirin) and various oral direct-acting antiviral agents (DAAs),this article summarizes the advantages and disadvantages of different combinations of DAAs in the treatment of chronic hepatitis C with different genotypes and briefly introduces the World Health Organization recommendations on the treatment of hepatitis C.Hepatitis C is expected to be eliminated with the development of pharmacotherapy for chronic hepatitis C.
Résumé
Objective To investigate epidemiological and clinical features of human ehrlichiosis.Methods The epidemiological, clinical, laboratory, therapeutic and prognostic data of 21 clinically diagnosed cases of human ehrlichiosis were retrospectively analyzed. Results The epidemic regions where the ticks' activity was high located at the boundary between Hubei and Henan Provinces. All cases were farmers. The median age was 50 years ranged from 19 to 69 years. The male female ratio evident history of tick bite 1 week before the onset. The common symptoms included fever, diarrhea,cough, nausea and vomiting, abdominal pain and expectoration. The complications included hemorrhage, toxic encephalopathy, acute renal insufficiency, secondary infection and respiratory failure. The common abnormalities of routine lab data were thrombocytopenia, hypoeosinophilia,elevated lactate dehydrogenase, creatine kinase and aminotransferases, leucopenia and proteinuria.Nine cases were tested with peripheral blood smear and intracytoplasmic inclusions in neutrophils were found in one case. Seventeen cases were tested with serological assay and antibodies against Ehrlichia were positive in five cases. After doxycycline, symptomatic and supportive treatments, 14 cases were recovered and seven died. The average age of the deaths was 56 years. Conclusions Human ehrlichiosis is an acute tick-borne zoonosis and multiorgan could be involved. The older cases prone to develop complications and the prognosis is poor.
Résumé
In this study, the anti-HBV effects of tea polyphenols (TP) were examined. After cells were exposed to TP for 3, 6, 9 days, amounts of HBsAg, HBeAg and HBV-DNA released into the supernatant of the cultured HepG2 2.2.15 cells were detected. TP, to some extent, inhibited the secretion of HBsAg and strongly suppressed the secretion of HBeAg in a dose-dependent (P<0.01) and time-dependent manner, with 50% maximal inhibitory concentration (IC50) value being 7.34 microg/mL on the 9th day, but the time-dependence was not significant (P=0.051). Expression of HBV-DNA in the supernatant of the cell culture also was significantly decreased in a dose-dependent fashion (P<0.01). The IC50 of TP in inhibiting HBV DNA was 2.54 microg/mL. It concluded that TP possessed potential anti-HBV effects and may be used as a treatment alternative for HBV infection.
Sujets)
Antiviraux/pharmacologie , ADN viral/analyse , Relation dose-effet des médicaments , Flavonoïdes/pharmacologie , Cellules HepG2 , Antigènes de surface du virus de l'hépatite B/analyse , Antigènes e du virus de l'hépatite virale B/analyse , Virus de l'hépatite B/effets des médicaments et des substances chimiques , Concentration inhibitrice 50 , Phénols/pharmacologie , Thé/composition chimiqueRésumé
OBJECTIVE To investigate the effects of somatostatin(SST)on expression of NO,TNF? and 5-lipoxygenase(5-LO)in primary cultured rat Kupffer cells induced by LPS.METHODS Kupffer cells isolated from Sprague-Dawley rats were cultured in the presence of LPS added alone or with SST for 12,24 and 48 h,and the production of TNF? was assessed in culture supernatants by ELISA and that of nitric oxide(NO)by nitrate reductase method.5-LO mRNA expression was assessed by semiquantitative RT-PCR.RESULTS Vehicle-stimulated Kupffer cells produced a basal amount of NO,TNF? and expressed 5-LO mRNA.Kupffer cells stimulated by LPS secreted significantly increased amounts of NO and TNF?(P0.05).CONCLUSIONS SST modulates NO,TNF? production and 5-LO mRNA expression by LPS-stlimulated Kupffer cells.