The present investigation was undertaken to find out the best medium composition for medium-term preservation of disease free potato shoot tips in in vitro system.Thirteen potato genotypes and fourteen treatments were...The present investigation was undertaken to find out the best medium composition for medium-term preservation of disease free potato shoot tips in in vitro system.Thirteen potato genotypes and fourteen treatments were taken under consideration for the present experiment.Among fourteen treatments,mannitol and sorbitol containing media proved to be the best for medium-term preservation of potato shoot tips.High concentration of mannitol delayed root formation.展开更多
Chronic hepatitis B is globally prevalent and is a major cause of cirrhosis and hepatocellular carcinoma.Despite immunoprophylaxis against hepatitis B in pregnancy,perinatal transmission still occurs in at least 10%of...Chronic hepatitis B is globally prevalent and is a major cause of cirrhosis and hepatocellular carcinoma.Despite immunoprophylaxis against hepatitis B in pregnancy,perinatal transmission still occurs in at least 10%of the children born to a mother with high level of viremia.Decisions regarding hepatitis B therapy during pregnancy must take into account the benefits and safety for both the mother and the unborn baby.In this review,we summarize the current treatment options for chronic hepatitis B with a focus on management during pregnancy and the evidence-based strategies to prevent vertical transmission of hepatitis B virus(HBV).展开更多
Gene silencing (RNA silencing) plays a fundamental role in antiviral defense in plants, fungi and invertebrates. Viruses encode proteins that suppress gene silencing to counter host defense. Viral suppressors of RNA s...Gene silencing (RNA silencing) plays a fundamental role in antiviral defense in plants, fungi and invertebrates. Viruses encode proteins that suppress gene silencing to counter host defense. Viral suppressors of RNA silencing (VSRs) have been identified from almost all plant virus genera and some viruses of insects and mammals. Recent studies have revealed that VSRs counter host defense and interfere with host gene regulation by interacting with RNA or important components of the RNA silencing pathway. Here, we review the current understanding of the complex mechanisms of VSRs that have been revealed by recent studies.展开更多
文摘The present investigation was undertaken to find out the best medium composition for medium-term preservation of disease free potato shoot tips in in vitro system.Thirteen potato genotypes and fourteen treatments were taken under consideration for the present experiment.Among fourteen treatments,mannitol and sorbitol containing media proved to be the best for medium-term preservation of potato shoot tips.High concentration of mannitol delayed root formation.
文摘Chronic hepatitis B is globally prevalent and is a major cause of cirrhosis and hepatocellular carcinoma.Despite immunoprophylaxis against hepatitis B in pregnancy,perinatal transmission still occurs in at least 10%of the children born to a mother with high level of viremia.Decisions regarding hepatitis B therapy during pregnancy must take into account the benefits and safety for both the mother and the unborn baby.In this review,we summarize the current treatment options for chronic hepatitis B with a focus on management during pregnancy and the evidence-based strategies to prevent vertical transmission of hepatitis B virus(HBV).
基金supported by the National Basic Research Program of China (Grant No. 2012CB114004)the National Natural Science Foundation of China (Grant Nos. 31030005 and 30910103904)
文摘Gene silencing (RNA silencing) plays a fundamental role in antiviral defense in plants, fungi and invertebrates. Viruses encode proteins that suppress gene silencing to counter host defense. Viral suppressors of RNA silencing (VSRs) have been identified from almost all plant virus genera and some viruses of insects and mammals. Recent studies have revealed that VSRs counter host defense and interfere with host gene regulation by interacting with RNA or important components of the RNA silencing pathway. Here, we review the current understanding of the complex mechanisms of VSRs that have been revealed by recent studies.
