AIM:To evaluate the safety and efficacy of vitamin E in children with chronic hepatitis B.METHODS:We randomly assigned patients with chronic hepatitis B,positive for hepatitis B e antigen(HBeAg),to receive either vita...AIM:To evaluate the safety and efficacy of vitamin E in children with chronic hepatitis B.METHODS:We randomly assigned patients with chronic hepatitis B,positive for hepatitis B e antigen(HBeAg),to receive either vitamin E or placebo once daily for 6 mo in a 3:1 ratio and double-blind manner.The primary end point was HBeAg seroconversion,defined as the loss of HBeAg,undetectable levels of serum hepatitis B virus DNA,and the appearance of antibodies against HBeAg 12 mo after therapy.RESULTS:At baseline visit,49 patients had normal and 43 had increased serum aminotransferase levels.Twenty-nine patients did not respond to previous treatment with interferon-α or lamivudine.Seventy-six children completed the study;16 were non-compliant(n = 7),lost to follow-up(n = 7),or started another antiviral treatment(n = 3).Intention-to-treat analysis showed HBeAg seroconversion in 16 children(23.2%) treated with vitamin E and two(8.7%) in the placebo group(P = 0.13).Vitamin E was well tolerated.CONCLUSION:There is only a tendency that vitamin E may promote HBeAg seroconversion.Therefore larger studies are needed to clarify the role of antioxidants in the therapy of chronic hepatitis B.展开更多
The influence of a novel three-step aging on strength, stress corrosion cracking(SCC) and microstructure of AA7085 was investigated by tensile testing and slow strain rate testing combined with transmission electron m...The influence of a novel three-step aging on strength, stress corrosion cracking(SCC) and microstructure of AA7085 was investigated by tensile testing and slow strain rate testing combined with transmission electron microscopy(TEM). The results indicate that with the increase of second-step aging time of two-step aging, the mechanical properties increase first and then decrease, while the SCC resistance increases. Compared with two-step aging, three-step aging treatment improves SCC resistance and the strength increases by about 5%. The effects of novel three-step aging on strength and SCC resistance are explained by the role of matrix precipitates and grain boundary precipitates, respectively.展开更多
文摘AIM:To evaluate the safety and efficacy of vitamin E in children with chronic hepatitis B.METHODS:We randomly assigned patients with chronic hepatitis B,positive for hepatitis B e antigen(HBeAg),to receive either vitamin E or placebo once daily for 6 mo in a 3:1 ratio and double-blind manner.The primary end point was HBeAg seroconversion,defined as the loss of HBeAg,undetectable levels of serum hepatitis B virus DNA,and the appearance of antibodies against HBeAg 12 mo after therapy.RESULTS:At baseline visit,49 patients had normal and 43 had increased serum aminotransferase levels.Twenty-nine patients did not respond to previous treatment with interferon-α or lamivudine.Seventy-six children completed the study;16 were non-compliant(n = 7),lost to follow-up(n = 7),or started another antiviral treatment(n = 3).Intention-to-treat analysis showed HBeAg seroconversion in 16 children(23.2%) treated with vitamin E and two(8.7%) in the placebo group(P = 0.13).Vitamin E was well tolerated.CONCLUSION:There is only a tendency that vitamin E may promote HBeAg seroconversion.Therefore larger studies are needed to clarify the role of antioxidants in the therapy of chronic hepatitis B.
基金Project(2012CB619502)supported by the National Basic Research Program of ChinaProject(2016YFB0300800)supported by the National Key Research and Development Program of China+1 种基金Project(CALT201507)supported by the CALT Research Innovation Partnership Fund,ChinaProject(HPCM-201403)supported by the State Key Laboratory of High Performance Complex Manufacturing,China
文摘The influence of a novel three-step aging on strength, stress corrosion cracking(SCC) and microstructure of AA7085 was investigated by tensile testing and slow strain rate testing combined with transmission electron microscopy(TEM). The results indicate that with the increase of second-step aging time of two-step aging, the mechanical properties increase first and then decrease, while the SCC resistance increases. Compared with two-step aging, three-step aging treatment improves SCC resistance and the strength increases by about 5%. The effects of novel three-step aging on strength and SCC resistance are explained by the role of matrix precipitates and grain boundary precipitates, respectively.
