VETERINARY MICROBIOLOGY
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2025
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IF 2.7
Xiaomei Du,Qi Xiao,Li Yang,Yiyi Shan,Yueqing Hu,Wenbin Bao,Shenglong Wu,Zhengchang Wu
Porcine circovirus type 2 (PCV2) is the main pathogen causing postweaning multisystemic wasting syndrome, which leads to enormous losses for porcine industry. However, the regulatory mechanism of PCV2 replication in host cells remains not been clarified. Here, pig DNMT3B was identified as be a host regulator associated with PCV2 infection via RNA-seq analysis. We demonstrated that upregulation of DNMT3B expression can effectively inhibit PCV2 replication in PK15 cells. Besides, TMEM37 acts as a key downstream target of DNMT3B in PCV2-infected PK15 cells. TMEM37 knockdown significantly slowed Ca 2+ influx, and thus inhibited PCV2 replication. Taken together, DNMT3B is required for the PCV2-based infection regulation in host cells. Our findings indicated that DNMT3B inhibits PCV2 replication via targeting TMEM37 to regulate Ca 2+ influx in PK15 cells, which offering a theoretical foundation for the use of this gene as a key biomarker for breeding strategies seeking to improve porcine disease resistance.
研究领域:
兽医学
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分子生物学
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病毒学
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动物遗传学
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产品关联
DOI
PubMed
高影响因子
PROCESS BIOCHEMISTRY
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2018
·
IF 2.616
Sipeng Li,Jifu Liu,Zhaoyang Ding,Xuejun Cao
The vaccine against porcine circovirus type II (PCV2) is mainly composed of virus capsid proteins. An efficient separation method of PCV2 Cap protein has not been developed. Affinity precipitation methods with high selectivity and recoverability based on the thermo-responsive affinity polymer (P NDBN -Ni) were introduced to separate the PCV2 Cap protein. When the temperature was above the polymer LCST (36.1 °C), P NDBN -Ni could be precipitated with a recovery of above 95.00%. The affinity ligand immobilized on the polymer could specifically bind the proteins. The optimal conditions for affinity precipitation were a pH of 6.0 with a ligand density of 56.22 μmol/g polymer at 25.0 °C. The final results were detected by electrophoresis. The interactions between proteins and ligands were determined by the change in ligand state as seen using X-ray photoelectron spectra (XPS).
研究领域:
生物化学
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病毒学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL IMMUNOPHARMACOLOGY
·
2026
·
IF 5.6
Lei Zhu,Guan Zhang,Jiasai Kang,Xinru Xu,Haoshu Zhang,Yingying Pu,Yong Huang,Dewen Tong,Qian Du
Background Folium Isatidis (Da Qing Ye), a traditional Chinese medicine, exhibits broad-spectrum antiviral and immunomodulatory properties and has been widely used in treating respiratory diseases. Porcine circovirus type 2 (PCV2), a widespread swine virus, causes respiratory disease complex in piglets and leads to substantial economic losses in the global swine industry. This study aimed to evaluate the anti-PCV2 activity of Folium Isatidis . Materials and methods The anti-PCV2 activity of Folium Isatidis was first validated through both in vivo and in vitro experiments. Potential targets of Folium Isatidis were identified using TCMSP, BATMAN-TCM, and SwissTargetPrediction databases, and intersected with PCV2-related targets. Mechanism exploration involved PPI network analysis, GO annotation, and KEGG enrichment. Molecular docking analyzed component-target interactions, followed by experimental validation of the core component. Finally, the anti-PCV2 effect of the core component was verified through in vitro and in vivo experiments. Results A total of 135 overlapping targets between Folium Isatidis components and PCV2-related disease targets were identified. Key targets, including AKT1 and TNF-α, were implicated in the therapeutic effects of Folium Isatidis against PCV2. Isovitexin was identified to be the core component that directly binds to AKT1 and TNF-α, thereby inhibiting the PI3K/AKT signaling pathway and regulating TNF-α expression and activity to suppress PCV2 replication and alleviate PCV2-induced lung injury. Conclusions Our study reveals that Isovitexin, the core anti-PCV2 component of Folium Isatidis , exerts its effect by inhibiting the PI3K/AKT pathway and modulating TNF-α, thereby outlining a novel therapeutic strategy for combating PCV2 infection and associated respiratory injuries.
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2018
·
IF 3.716
Juan He,Junfen Wan,Ting Yang,Xuejun Cao,Lin Yang
Aqueous two-phase system (ATPS) has great potential in industrial applications of bio-separations and bio-reactions. However, its large-scale application is limited by recovery difficulty of phase systems. In this paper, a recyclable ATPS was prepared by two pH-responsive copolymers (P ADB4.99 and P MDM7.08 ) and applied for purification of porcine circovirus type 2 Cap protein fermentation broth (PCV2 Cap protein). Phase separation mechanism was studied by using low-field nuclear magnetic resonance (LF-NMR). The results showed that relatively desirable ATPS were formed successfully when two copolymer concentrations were 4%–6% (w/w) with pH 7.5–8.6. The main parameters, such as copolymer concentration, temperature, pH, type and concentration of salts, were investigated. The results demonstrated that the best ATPS consisted of 4% (w/w) P ADB4.99 and 6% (w/w) P MDM7.08 , the optimal partition coefficient (K) and extraction recovery (ER) of PCV2 cap protein were 0.25 and 94.2% in the presence of 50 mM Li 2 SO 4 , 3.53 and 93.4% in the presence of 40 mM KCl, respectively, at 30 °C, pH 8.1. The maximum purity of PCV2 Cap protein was 88.4%. In addition, the two phase-forming copolymers could be recycled by adjusting solution pH to their isoelectric points (pI), with recoveries of over 97.5%.
研究领域:
生物分离技术
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病毒学
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生物化学
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产品关联
DOI
PubMed
高影响因子
Veterinary Sciences
·
2024
·Vol. 11
·期 3
·135
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IF 2
Yiyi Shan,Qi Xiao,Kongwang He,Shenglong Wu,Wenbin Bao,Zhengchang Wu
Simple SummaryPorcine circovirus type 2 (PCV2) infection can cause immunosuppression in pigs, create conditions for other virus infections, and bring serious economic losses to the pig industry. 5-Azacytidine (5-Aza) is a potent inhibitor of DNA methylation. In this study, we focused on the effects of 5-Aza on PCV2 infection in porcine kidney cells (PK15 cells). We found that 5-Aza could activate cell apoptosis and inflammatory factors and promote PCV2 replication through the MAPK signaling pathway.AbstractPorcine circovirus type 2 (PCV2) is the main pathogen causing post-weaning multisystemic wasting syndrome (PMWS), which mainly targets the body’s immune system and poses a serious threat to the global pig industry. 5-Azacytidine is a potent inhibitor of DNA methylation, which can participate in many important physiological and pathological processes, including virus-related processes, by inhibiting gene expression. However, the impact of 5-Aza on PCV2 replication in cells is not yet clear. We explored the impact of 5-Aza on PCV2 infection utilizing PK15 cells as a cellular model. Our objective was to gain insights that could potentially offer novel therapeutic strategies for PCV2. Our results showed that 5-Aza significantly enhanced the infectivity of PCV2 in PK15 cells. Transcriptome analysis revealed that PCV2 infection activated various immune-related signaling pathways. 5-Aza may activate the MAPK signaling pathway to exacerbate PCV2 infection and upregulate the expression of inflammatory and apoptotic factors.
研究领域:
兽医学
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分子生物学
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病毒学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Immunology
·
2024
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IF 5.7
Lu Chenhe,Li Haimin,Chen Wenjing,Li Hui,Ma Jiayu,Peng Peng,Yan Yan,Dong Weiren,Jin Yulan,Pan Shiyue,Shang Shaobin,Gu Jinyan,Zhou Jiyong
Introduction: Variant pseudorabies virus (PRV) is a newly emerged zoonotic pathogen that can cause human blindness. PRV can take advantage of its large genome and multiple non-essential genes to construct recombinant attenuated vaccines carrying foreign genes. However, a major problem is that the foreign genes in recombinant PRV are only integrated into the genome for independent expression, rather than assembled on the surface of virion.Methods: We reported a recombinant PRV with deleted gE/TK genes and an inserted porcine circovirus virus 2 (PCV2) Cap gene into the extracellular domain of the PRV gE gene using the Cre-loxP recombinant system combined with the CRISPR-Cas9 gene editing system. This recombinant PRV (PRV-Cap), with the envelope-embedded Cap protein, exhibits a similar replication ability to its parental virus.Results: An immunogenicity assay revealed that PRV-Cap immunized mice have 100% resistance to lethal PRV and PCV2 attacks. Neutralization antibody and ELISPOT detections indicated that PRV-Cap can enhance neutralizing antibodies to PRV and produce IFN-γ secreting T cells specific for both PRV and PCV2. Immunological mechanistic investigation revealed that initial immunization with PRV-Cap stimulates significantly early activation and expansion of CD69+ T cells, promoting the activation of CD4 Tfh cell dependent germinal B cells and producing effectively specific effector memory T and B cells. Booster immunization with PRV-Cap recalled the activation of PRV-specific IFN-γ+IL-2+CD4+ T cells and IFN-γ+TNF-α+CD8+ T cells, as well as PCV2-specific IFN-γ+TNF-α+CD8+ T cells.Conclusion: Collectively, our data suggested an immunological mechanism in that the recombinant PRV with envelope-assembled PCV2 Cap protein can serve as an excellent vaccine candidate for combined immunity against PRV and PCV2, and provided a cost-effective method for the production of PRV- PCV2 vaccine.
研究领域:
病毒学
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免疫学
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分子生物学
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疫苗开发
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产品关联
DOI
PubMed
高影响因子
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