Analysis of the pX region of bovine leukemia virus in different clinical stages of Enzootic Bovine Leukemia in Argentine Holstein cattle

详细信息    查看全文

• 作者：Carlos Javier Panei^a ; ^b ; ² ; Marí ; a Soledad Serena^a ; ¹ ; Germ&#225 ; n Ernesto Metz^a ; ¹ ; Marí ; a Emilia Bravi^a ; Ester Teresa Gonz&#225 ; lez^a ; Marí ; a Gabriela Echeverrí ; a^a ; ² ; ^{gecheverria@fcv.unlp.edu.ar}
• 关键词：Bovine leukemia virus ; pX region ; Clinical stages
• 刊名：Virus Research
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：171
• 期：1
• 页码：97-102
• 全文大小：489 K

文摘

Bovine leukemia virus (BLV) infection in cattle causes Enzootic Bovine Leukemia (EBL). About 30 % of infected cattle develop persistent lymphocytosis (PL), a 0.1-5 % develops tumors, and a 70 % remains asymptomatic in an aleukemic stage (AL). Regulatory genes of BLV (Tax, Rex, R3 and G4) are located in a region known as pX_BLV. The variability of those genes had been postulated with the progression of the disease. The aim of this work was to compare the wild-type proviral pX_BLV region at different stages of BLV natural infected cattle from Argentine Holstein. Pairs of primers were designed to amplify the proviral pX region of 12 cattle by PCR, and products were then sequenced, aligned and compared both with each other and with the reference sequence. Results show a divergence percentage from 0 to 6.1 for the Tax gene, from 0 to 9.4 % for the Rex gene, from 0 to 12.1 % for the R3 gene and finally from 0 to 6.5 % for the G4 gene. Results obtained with hierarchical clustering showed two clusters well differentiated, where the members of each cluster are cattle that had tumor, PL and AL, not allowing differentiate those two cluster by clinical stage.