Positive selection pressure on E2 protein of classical swine fever virus drives variations in virulence, pathogenesis and antigenicity: Implication for epidemiological surveillance in endemic areas

2019 ◽  
Vol 66 (6) ◽  
pp. 2362-2382 ◽  
Author(s):  
Liani Coronado ◽  
Liliam Rios ◽  
María Teresa Frías ◽  
Laymara Amarán ◽  
Paula Naranjo ◽  
...  
Keyword(s):  
Positive Selection ◽  
Classical Swine Fever Virus ◽  
Selection Pressure ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
Epidemiological Surveillance ◽  
Positive Selection Pressure ◽  
E2 Protein ◽  
Endemic Areas

Positive selection pressure on the B/C domains of the E2-gene of classical swine fever virus in endemic areas under C-strain vaccination

2012 ◽  
Vol 12 (7) ◽  
pp. 1405-1412 ◽  
Author(s):  
Lester Josué Pérez ◽  
Heidy Díaz de Arce ◽  
Carmen Laura Perera ◽  
Rosa Rosell ◽  
Maria T. Frías ◽  
...  
Keyword(s):  
Positive Selection ◽  
Classical Swine Fever Virus ◽  
Selection Pressure ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
Positive Selection Pressure ◽  
E2 Gene ◽  
Endemic Areas

scholarly journals Immunogenicity in Swine of Orally Administered Recombinant Lactobacillus plantarum Expressing Classical Swine Fever Virus E2 Protein in Conjunction with Thymosin α-1 as an Adjuvant

2015 ◽  
Vol 81 (11) ◽  
pp. 3745-3752 ◽  
Author(s):  
Yi-Gang Xu ◽  
Xue-Ting Guan ◽  
Zhong-Mei Liu ◽  
Chang-Yong Tian ◽  
Li-Chun Cui
Keyword(s):  
Immune Responses ◽  
Lactobacillus Plantarum ◽  
Classical Swine Fever Virus ◽  
Oral Vaccine ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
Economic Losses ◽  
E2 Protein ◽  
Content Type ◽  
Cellular Immune

ABSTRACTClassical swine fever, caused by classical swine fever virus (CSFV), is a highly contagious disease that results in enormous economic losses in pig industries. The E2 protein is one of the main structural proteins of CSFV and is capable of inducing CSFV-neutralizing antibodies and cytotoxic T lymphocyte (CTL) activitiesin vivo. Thymosin α-1 (Tα1), an immune-modifier peptide, plays a very important role in the cellular immune response. In this study, genetically engineeredLactobacillus plantarumbacteria expressing CSFV E2 protein alone (L. plantarum/pYG-E2) and in combination with Tα1 (L. plantarum/pYG-E2-Tα1) were developed, and the immunogenicity of each as an oral vaccine to induce protective immunity against CSFV in pigs was evaluated. The results showed that recombinantL. plantarum/pYG-E2 andL. plantarum/pYG-E2-Tα1 were both able to effectively induce protective immune responses in pigs against CSFV infection by eliciting immunoglobulin A (IgA)-based mucosal, immunoglobulin G (IgG)-based humoral, and CTL-based cellular immune responses via oral vaccination. Significant differences (P< 0.05) in the levels of immune responses were observed betweenL. plantarum/pYG-E2-Tα1 andL. plantarum/pYG-E2, suggesting a better immunogenicity ofL. plantarum/pYG-E2-Tα1 as a result of the Tα1 molecular adjuvant that can enhance immune responsiveness and augment specific lymphocyte functions. Our data suggest that the recombinantLactobacillusmicroecological agent expressing CSFV E2 protein combined with Tα1 as an adjuvant provides a promising strategy for vaccine development against CSFV.

Hypervariable antigenic region 1 of classical swine fever virus E2 protein impacts antibody neutralization

Vaccine ◽  
2016 ◽  
Vol 34 (33) ◽  
pp. 3723-3730 ◽  
Author(s):  
Xun Liao ◽  
Zuohuan Wang ◽  
Tong Cao ◽  
Chao Tong ◽  
Shichao Geng ◽  
...  
Keyword(s):  
Classical Swine Fever Virus ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
Antibody Neutralization ◽  
E2 Protein ◽  
Antigenic Region

Induction of immune responses in mice and pigs by oral administration of classical swine fever virus E2 protein expressed in rice calli

2014 ◽  
Vol 159 (12) ◽  
pp. 3219-3230 ◽  
Author(s):  
Myunghwan Jung ◽  
Yun Ji Shin ◽  
Ju Kim ◽  
Seung-Bin Cha ◽  
Won-Jung Lee ◽  
...  
Keyword(s):  
Immune Responses ◽  
Oral Administration ◽  
Classical Swine Fever Virus ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
E2 Protein ◽  
Rice Calli

Immunogenicity of a lettuce-derived vaccine candidate expressing the E2 protein against classical swine fever virus

2013 ◽  
Vol 113 (3) ◽  
pp. 483-490 ◽  
Author(s):  
Jinn-Chin Yiu ◽  
Cheng-Wei Liu ◽  
Ruei-Yuan Su ◽  
Wan-Jun Lai ◽  
Menq-Jiau Tseng ◽  
...  
Keyword(s):  
Classical Swine Fever Virus ◽  
Vaccine Candidate ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
E2 Protein

Optimized expression of classical swine fever virus E2 protein via combined strategy in Pichia pastoris

2020 ◽  
Vol 167 ◽  
pp. 105527
Author(s):  
Ding Li ◽  
Junchen Wu ◽  
Jin Chen ◽  
Dong Zhang ◽  
Yuanpeng Zhang ◽  
...  
Keyword(s):  
Pichia Pastoris ◽  
Classical Swine Fever Virus ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
E2 Protein ◽  
Combined Strategy
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