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Li S, Guo K, Wang X, Lin Y, Wang J, Wang Y, Du C, Hu Z, Wang X. Development and evaluation of a real-time quantitative PCR for the detection of equine infectious anemia virus. Microbiol Spectr 2023; 11:e0259923. [PMID: 37811976 PMCID: PMC10715080 DOI: 10.1128/spectrum.02599-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 08/22/2023] [Indexed: 10/10/2023] Open
Abstract
IMPORTANCE Equine infectious anemia (EIA) has a worldwide distribution and causes significant losses to the equine industry worldwide. A reliable detection method is necessary to control the transmission of EIA virus (EIAV). Currently, most of the available real-time PCR assays, including the qPCR of recommended by WOAH, are developed according to the sequences of European or American EIAV strains; however, the primers and probe sequences have low homology with Asian EIAV strains. To the best of our knowledge, no qPCR method capable of the well detection of Asian EIAV strains, especially Chinese EIAV strains, has been published to date. The development of a sensitive, specific, and rapid qPCR assay for the detection of the EIAV strains is therefore of great importance.
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Affiliation(s)
- Shuaijie Li
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Kui Guo
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Xuefeng Wang
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Yuezhi Lin
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Jinhui Wang
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Yaoxin Wang
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Cheng Du
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
| | - Zhe Hu
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
- WOAH Reference Laboratory for Equine Infectious Anemia, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, China
| | - Xiaojun Wang
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agriculture Sciences, Harbin, China
- WOAH Reference Laboratory for Equine Infectious Anemia, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, China
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Panei CJ, Gos ML, Valera AR, Galosi CM, Echeverria MG. First isolation and nucleotide comparison of the gag gene of the caprine arthritis encephalitis virus circulating in naturally infected goats from Argentina. Open Vet J 2017; 7:32-35. [PMID: 28331831 PMCID: PMC5356288 DOI: 10.4314/ovj.v7i1.5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 02/01/2017] [Indexed: 01/25/2023] Open
Abstract
Caprine arthritis encephalitis virus (CAEV) has been reported in different countries worldwide, based on serological and molecular detection. In Argentina, the prevalence of CAEV infections is increasing, with goats showing symptoms associated mostly with cachexia and arthritis. Although in Argentina the virus has been detected by serology, it has never been isolated or characterized. Thus, the objectives of this work were to isolate and analyze the nucleotide sequences of the gag gene of Argentine CAEV strains and compare them with those of other SRLVs previously reported. Nucleotide sequence comparison showed homology with CAEV-Co, the CAEV prototype. Phylogenetic analyses showed that the Argentine strains clustered with genotype B, subtype B1. Because the molecular characterization of the gag region is suitable for phylogenetic studies and may be applied to monitor the control of SRLV, molecularly characterizing the Argentine CAEV strains may help develop a proper plan of eradication of CAEV infections.
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Affiliation(s)
- Carlos Javier Panei
- Virology Laboratory, Faculty of Veterinary Sciences, National University of La Plata, 60 and 118, CC 296, 1900, La Plata, Argentina; National Scientific and Technical Research Council (CONICET), Argentina
| | - Maria Laura Gos
- National Scientific and Technical Research Council (CONICET), Argentina; Immunoparasitology Laboratory, Faculty of Veterinary Sciences, National University of La Plata, 60 and 118, CC 296, 1900, La Plata, Argentina
| | - Alejandro Rafael Valera
- Virology Laboratory, Faculty of Veterinary Sciences, National University of La Plata, 60 and 118, CC 296, 1900, La Plata, Argentina
| | - Cecilia Monica Galosi
- Virology Laboratory, Faculty of Veterinary Sciences, National University of La Plata, 60 and 118, CC 296, 1900, La Plata, Argentina; Scientific Research Commission of Buenos Aires Province (CIC-PBA), Argentina
| | - Maria Gabriela Echeverria
- Virology Laboratory, Faculty of Veterinary Sciences, National University of La Plata, 60 and 118, CC 296, 1900, La Plata, Argentina; National Scientific and Technical Research Council (CONICET), Argentina
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Machinaga A, Takase-Yoden S. A 38 nt region and its flanking sequences within gag of Friend murine leukemia virus are crucial for splicing at the correct 5' and 3' splice sites. Microbiol Immunol 2014; 58:38-50. [PMID: 24236664 DOI: 10.1111/1348-0421.12114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 10/25/2013] [Accepted: 11/12/2013] [Indexed: 11/27/2022]
Abstract
The genome of the Friend murine leukemia virus (Fr-MLV) contains a 5' splice site (5'ss) located at 205 nt and a 3'ss located at 5489 nt. In our previous studies, it was shown that if the HindIII-BglII (879-1904 bp) fragment within gag is deleted from the proA8m1 vector, which carries the entire Fr-MLV sequence, then cryptic splicing of env-mRNA occurs. Here, attempts were made to identify the genomic segment(s) in this region that is/are essential to correct splicing. First, vectors with a serially truncated HindIII-BglII fragment were constructed. The vector, in which a 38 bp fragment (1612-1649 bp) is deleted or reversed in proA8m1, only produced splice variants. It was found that a 38 nt region within gag contains important elements that positively regulate splicing at the correct splice sites. Further analyses of a series of vectors carrying the 38 bp fragment and its flanking sequences showed that a region (1183-1611 nt) upstream of the 38 nt fragment also contains sequences that positively or negatively influence splicing at the correct splice sites. The SphI-NdeI (5140-5400 bp) fragment just upstream of the 3'ss was deleted from vectors that carried the 38 bp fragment and its flanking sequences, which yielded correctly spliced mRNA; interestingly, these deleted vectors showed cryptic splicing. These findings suggest that the 5140-5400 nt region located just upstream of the 3'ss is required for the splicing function of the 38 nt fragment and its flanking sequences.
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Affiliation(s)
- Akihito Machinaga
- Department of Bioinformatics, Faculty of Engineering, Soka University, 1-236, Tangi-machi, Hachioji, Tokyo, 192-8577, Japan
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