畜牧兽医学报 ›› 2006, Vol. 37 ›› Issue (4): 396-400.

• 研究简报 • 上一篇    下一篇

伊氏锥虫安锥赛抗药性相关基因-TbTA1的分析

廖党金;沈 杰;董望年   

  1. 1. 四川省畜牧科学研究院,成都 610066; 2. 中国农业科学院上海家畜寄生虫病研究所,上海 200232;3. 眉山市畜牧局,眉山 612100
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-04-25 发布日期:2006-04-25

Analysis of TbTA1 Involved in Antrycide-resistance of Trypanosoma evansi

LIAO Dang-jin; SHEN Jie;DONG Wang-nian
  

  1. 1.Sichuan Academy of Animal and Science, Chengdu 610066, China;2.Shanghai Institute of Animal Parasitology, Chinese Academy of Agricultural Sciences, Shanghai 200232, China; 3.Meishan Animal Bureau, Meishan 612100, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-04-25 Published:2006-04-25

摘要: 为探讨伊氏锥虫对安锥赛抗药性的分子机理,以布氏锥虫对砷剂药物抗药性相关的TbTA1基因设计引物,以55℃、57℃、60℃、63℃和65℃不同退火温度,分别从伊氏锥虫敏感株的cDNA和基因组DNA中扩增出TbTA1基因的全长序列,但是从安锥赛抗药株伊氏锥虫的cDNA和基因组DNA中都未扩增出TbTA1基因,这表明基因TbTA1可能与伊氏锥虫安锥赛抗药性的产生有关。伊氏锥虫与布氏锥虫的TbTA1基因序列比较,它们有10个碱基不同,即第88位的G(T.e)-A(T.b)、第144位的T(T.e)-C(T.b)、第224位的C(T.e)-T(T.b)、第471位的C(T.e)-T(T.b)、第472位的A(T.e)-G(T.b)、第549位的G(T.e)-T(T.b)、第1 008位的C(T.e)-T(T.b)、第1 033位的A(T.e)-G(T.b)、第1 293位的A(T.e)-G(T.b)和第1 384位的T(T.e)-C(T.b),其中有5个碱基所编码的氨基酸不同,即Val30(T.e)-Ile(T.b)、Ala75(T.e)-Val(T.b)、Ile158(T.e)-Val(T.b)、Thr345(T.e)-Ala(T.b)和Ser462(T.e)-Pro(T.b),这表明伊氏锥虫与布氏锥虫的TbTA1差异可能是它们的种间差异。

关键词: 伊氏锥虫, 安锥赛, 抗药性, TbTA1

Abstract: For exploring mechanism of drug-resistance of Trypanosoma evansi to antrycide, the RT-PCR and PCR were performed to clone the TbTA1 from the sensitive strain(TeS) and the resistant strain(TeR) under the different conditions of annealing temperature. The TbTA1 was obtained from the cDNA and DNA of the sensitive strain, but not obtained from the antrycide-resistant strain of T. evansi. The results suggested that the TbTA1 in the drug-resistant strain had some changes which result in antrycide-resistance and the TbTA1 of T. evansi, therefore, is involved in antrycide-resistance of T. evansi. On the other hand, the comparison of sequence of the TbTA1 between T. evansi and T. brucei revealed the 10 different nucleotides, G88(T. e)-A(T. b), T144(T. e)-C(T. b), C224(T. e)-T(T. b), C471(T. e)-T(T. b), A472(T. e)-G(T. b), G549(T. e)-T(T. b), C1 008(T. e)-T(T. b), A1 033(T. e)-G(T. b), A1 293(T. e)-G(T. b) and T1 384(T. e)-C(T. b), resulting in Val30(T. e)-Ile(T. b), Ala75(T. e)-Val(T. b), Ila158(T. e)-Val(T. b), Thr345(T. e)-Ala(T. b) and Ser462(T. e)-Pro(T. b), these difference maybe due to different species.

Key words: Trypanosoma evansi, antrycide, drug-resistance, TbTA1