Long terminal repeat sequences from virulent and attenuated equine infectious anemia virus demonstrate distinct promoter activities
文献类型: 外文期刊
第一作者: Zhou, Tao
作者: Zhou, Tao;Yuan, Xiu-Fang;Hou, Shao-Hua;Tu, Ya-Bin;Peng, Jin-Mei;Wen, Han-Xin;Qiu, Hua-H;Wu, Dong-Lai;Chen, Huan-Chun;Wang, Xiao-Jun;Tong, Guang-Zhi
作者机构:
关键词: EIAV attenuation;LTR variation;In vivo;In vitro;MDM;promoter activity
期刊名称:VIRUS RESEARCH ( 影响因子:3.303; 五年影响因子:3.445 )
ISSN: 0168-1702
年卷期: 2007 年 128 卷 1-2 期
页码:
收录情况: SCI
摘要: In the early 1970s, the Chinese Equine Infectious Anemia Virus (EIAV) vaccine, EIAV(DLA), was developed through successive passages of a wild-type virulent virus (EIAV(L)) in donkeys in vivo and then in donkey macrophages in vitro. EIAV attenuation and cell tropism adaptation are associated with changes in both envelope and long terminal repeat (LTR). However, specific LTR changes during Chinese EIAV attenuation have not been demonstrated. In this study, we compared LTR sequences from both virulent and attenuated EIAV strains and documented the diversities of LTR sequence from in vivo and in vitro infections. We found that EIAV LTRs of virulent strains were homologous, while EIAV vaccine have variable LTRs. Interestingly, experimental inoculation of EIAV(DLA) into a horse resulted in a restriction of the LTR variation, Furthermore, LTRs from EIAVDLA showed higher Tat transactivated activity than LTRs from virulent strains. By using chimeric clones of wild-type LTR and vaccine LTR, the main difference of activity was mapped to the changes of R region, rather than U3 region. (C) 2007 Elsevier B.V. All rights reserved.
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