To examine the effect of Gankang Suppository on duck hepatitis B virus （DHBV）, the serum biochemistry and hepatic histology in an animal model of DHBV infection, a model of DHBV infection was established by infectin...To examine the effect of Gankang Suppository on duck hepatitis B virus （DHBV）, the serum biochemistry and hepatic histology in an animal model of DHBV infection, a model of DHBV infection was established by infecting 1-day-old Yingtaogu ducklings with DHBV-positive serum. The successful model was confirmed by PCR assay and 48 ducklings infected with DHBV were randomly divided into 3 groups： a Gankang Suppository treatment group, an acyclovir （ACV） group and a DHBV model group （control）, with each group having 16 animals. All the animals were given the medicines for 4 weeks in a row. The serum of the animals was taken 14 and 28 days after the medica- tion and 7 days after drug discontinuation. Real-time PCR was performed to detect the copy numbers of DHBV DNA in the serum. ALT and AST were dynamically monitored. The ducklings were sacrificed on the 7th day after the discontinuation of the treatment and livers were harvested and examined for inflammation and degeneration of liver cells by using HE staining. The results showed that on day 14, 28 after the treatment and day 7 after the withdrawal, the logarithmic values （log） of DHBV DNA copy numbers in ducklings of Gankang Suppository treatment group were significantly lower than that before the treatment （P=0.0092, P=0.0070, P=0.0080, respectively）. Compared with DHBV model control group, the ALT level was significantly decreased （P=0.0020, P=0.0019, respectively） on day 28 after the treatment and on day 7 after the withdrawal. The AST level was also reduced on day 14 after the treatment （P=0.0298）. Compared with the ACV control group, the level of ALT was lower on day 7 after the withdrawal （P=0.0016）. Histologically, the hepatocyte swelling, vacuolous degeneration and acidophilic degeneration in Gankang Suppository treatment group were alleviated 7 days after the withdrawal as compared with model control group （P=0.0282, P=0.0084, P=0.0195, respectively）. It is concluded that Gankang Suppository can effectively suppress DHBV replication, reduce the levels of serum ALT and AST and improve hepatic histology.展开更多
The hepatitis B virus(HBV)is considered to be a major public health problem worldwide,and a significant number of reports on nosocomial outbreaks of HBV infections have been reported.Prevention of indirect HBV transmi...The hepatitis B virus(HBV)is considered to be a major public health problem worldwide,and a significant number of reports on nosocomial outbreaks of HBV infections have been reported.Prevention of indirect HBV transmission by contaminated objects is only possible through the use of infection-control principles,including the use of chemical biocides,which are proven to render the virus non-infectious.The virucidal activity of biocides against HBV cannot be predicted;therefore,validation of the virucidal action of disinfectants against HBV is essential.However,feasible HBV infectivity assays have not yet been established.Thus,surrogate models have been proposed for testing the efficacy of biocides against HBV.Most of these assays do not correlate with HBV infectivity.Currently,the most promising and feasible assay is the use of the taxonomically related duck hepatitis B virus(DHBV),which belongs to the same Hepadnaviridae virus family.This paper reviews the application of DHBV,which can be propagated in vitro in primary duck embryonic hepatocytes,for the testing of biocides and describes why this model can be used as reliable method to evaluate disinfectants for efficacy against HBV.The susceptibility levels of important biocides,which are often used as ingredients for commercially available disinfectants,are also described.展开更多
The effects of the extracts of 20 Chinese medicinal herbs and an antiviral drug foscarnet on duck hepatitis B virus (DHBV) endogenous DNA polymerase (DNAp) activity were compared. The extracts of P. urinaria showed a ...The effects of the extracts of 20 Chinese medicinal herbs and an antiviral drug foscarnet on duck hepatitis B virus (DHBV) endogenous DNA polymerase (DNAp) activity were compared. The extracts of P. urinaria showed a dose-dependent inhibition on DHBV DNAp. And those of other herbs showed little inhibition effect. Primary duck hepatocyte (PDH) cultures were used for evaluating effects of the extract of P. urinaria, foscarnet and acyclovir (ACV) on DHBV, and all the drugs or the extracts showed inhibition of DHBV DNA replication. Furthermore, in vivo trials were carried out. Peking ducks infected with LJ-76 strain of DHBV were treated with the extract of P. urinaria or ACV and compared with placebo treated control ducks. The treatment results in the loss or reduction of circulating viral DHBV DNA and DHBsAg.展开更多
目的:研究919糖浆时鸭乙型肝炎的体内抗病毒作用。方法:以感染鸭乙型肝炎病毒(DHBV)的武汉麻鸭为实验动物模型。使1d龄武汉麻鸭感染DHBV,7d后用Dot-EIA法筛选出DHBsAg强阳性鸭。随机分组后给予919糖浆治疗14d,于感染后第7d(为用药前)、...目的:研究919糖浆时鸭乙型肝炎的体内抗病毒作用。方法:以感染鸭乙型肝炎病毒(DHBV)的武汉麻鸭为实验动物模型。使1d龄武汉麻鸭感染DHBV,7d后用Dot-EIA法筛选出DHBsAg强阳性鸭。随机分组后给予919糖浆治疗14d,于感染后第7d(为用药前)、用药7d、14d及停药后3d分别采血,采用斑点杂交方法检测血清DHBVDNA。结果。用药919糖浆7d、14d鸭血清DHBV DNA OD值均明显低于给药前,有显著性差异(P<0.05,P<0.01)。停药3d后没有反跳现象。结论:919糖浆有一定的抑制DHBV DNA复制作用。展开更多
基金the National Natural Science Foundation of China (No. 30471533)
文摘To examine the effect of Gankang Suppository on duck hepatitis B virus （DHBV）, the serum biochemistry and hepatic histology in an animal model of DHBV infection, a model of DHBV infection was established by infecting 1-day-old Yingtaogu ducklings with DHBV-positive serum. The successful model was confirmed by PCR assay and 48 ducklings infected with DHBV were randomly divided into 3 groups： a Gankang Suppository treatment group, an acyclovir （ACV） group and a DHBV model group （control）, with each group having 16 animals. All the animals were given the medicines for 4 weeks in a row. The serum of the animals was taken 14 and 28 days after the medica- tion and 7 days after drug discontinuation. Real-time PCR was performed to detect the copy numbers of DHBV DNA in the serum. ALT and AST were dynamically monitored. The ducklings were sacrificed on the 7th day after the discontinuation of the treatment and livers were harvested and examined for inflammation and degeneration of liver cells by using HE staining. The results showed that on day 14, 28 after the treatment and day 7 after the withdrawal, the logarithmic values （log） of DHBV DNA copy numbers in ducklings of Gankang Suppository treatment group were significantly lower than that before the treatment （P=0.0092, P=0.0070, P=0.0080, respectively）. Compared with DHBV model control group, the ALT level was significantly decreased （P=0.0020, P=0.0019, respectively） on day 28 after the treatment and on day 7 after the withdrawal. The AST level was also reduced on day 14 after the treatment （P=0.0298）. Compared with the ACV control group, the level of ALT was lower on day 7 after the withdrawal （P=0.0016）. Histologically, the hepatocyte swelling, vacuolous degeneration and acidophilic degeneration in Gankang Suppository treatment group were alleviated 7 days after the withdrawal as compared with model control group （P=0.0282, P=0.0084, P=0.0195, respectively）. It is concluded that Gankang Suppository can effectively suppress DHBV replication, reduce the levels of serum ALT and AST and improve hepatic histology.
文摘The hepatitis B virus(HBV)is considered to be a major public health problem worldwide,and a significant number of reports on nosocomial outbreaks of HBV infections have been reported.Prevention of indirect HBV transmission by contaminated objects is only possible through the use of infection-control principles,including the use of chemical biocides,which are proven to render the virus non-infectious.The virucidal activity of biocides against HBV cannot be predicted;therefore,validation of the virucidal action of disinfectants against HBV is essential.However,feasible HBV infectivity assays have not yet been established.Thus,surrogate models have been proposed for testing the efficacy of biocides against HBV.Most of these assays do not correlate with HBV infectivity.Currently,the most promising and feasible assay is the use of the taxonomically related duck hepatitis B virus(DHBV),which belongs to the same Hepadnaviridae virus family.This paper reviews the application of DHBV,which can be propagated in vitro in primary duck embryonic hepatocytes,for the testing of biocides and describes why this model can be used as reliable method to evaluate disinfectants for efficacy against HBV.The susceptibility levels of important biocides,which are often used as ingredients for commercially available disinfectants,are also described.
文摘The effects of the extracts of 20 Chinese medicinal herbs and an antiviral drug foscarnet on duck hepatitis B virus (DHBV) endogenous DNA polymerase (DNAp) activity were compared. The extracts of P. urinaria showed a dose-dependent inhibition on DHBV DNAp. And those of other herbs showed little inhibition effect. Primary duck hepatocyte (PDH) cultures were used for evaluating effects of the extract of P. urinaria, foscarnet and acyclovir (ACV) on DHBV, and all the drugs or the extracts showed inhibition of DHBV DNA replication. Furthermore, in vivo trials were carried out. Peking ducks infected with LJ-76 strain of DHBV were treated with the extract of P. urinaria or ACV and compared with placebo treated control ducks. The treatment results in the loss or reduction of circulating viral DHBV DNA and DHBsAg.
文摘目的:研究919糖浆时鸭乙型肝炎的体内抗病毒作用。方法:以感染鸭乙型肝炎病毒(DHBV)的武汉麻鸭为实验动物模型。使1d龄武汉麻鸭感染DHBV,7d后用Dot-EIA法筛选出DHBsAg强阳性鸭。随机分组后给予919糖浆治疗14d,于感染后第7d(为用药前)、用药7d、14d及停药后3d分别采血,采用斑点杂交方法检测血清DHBVDNA。结果。用药919糖浆7d、14d鸭血清DHBV DNA OD值均明显低于给药前,有显著性差异(P<0.05,P<0.01)。停药3d后没有反跳现象。结论:919糖浆有一定的抑制DHBV DNA复制作用。
