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Fu PF, Wang YH, Liu G, Wang DM, Huang WW, Guo DQ, Li XY, Liu P, Wei MX, Lu M, Hong J. First molecular detection and genetic characterization of porcine circovirus 4 in the Gansu Province of China. PLoS One 2024; 19:e0293135. [PMID: 38315677 PMCID: PMC10843115 DOI: 10.1371/journal.pone.0293135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/06/2023] [Indexed: 02/07/2024] Open
Abstract
Since its initial discovery in the Hunan province of China, genomic DNA of porcine circovirus 4 (PCV4) has been detected in pigs across multiple provinces in China, as well as in South Korea. However, the prevalence of porcine circovirus type 4 in Gansu Province, China, remains unknown. To address this gap, we undertook an extensive study where we gathered 121 clinical samples displaying diverse clinical manifestations from pig farms in Gansu Province between 2022 and 2023. Employing a real-time fluorescence quantification method, we identified the presence of PCV4 genome. Out of the 121 clinical samples analyzed, 13 samples tested positive for PCV4, resulting in a positive rate of 10.74% (13/121). This finding confirms the presence of PCV4 in pig farms within Gansu Province, China. Furthermore, we successfully sequenced and analyzed the complete genomes of two distinct PCV4 strains, comparing them with 60 reference sequences archived in the GenBank database. The results revealed a high nucleotide homology (98.2-98.8%) between the strains obtained in this study and the PCV4 reference strains, indicating a relatively low evolutionary rate of the PCV4 genome. Phylogenetic analysis revealed that two strains in this study belong to PCV4a and PCV4c. As far as we know, this study marks the inaugural report on the molecular identification and genomic attributes of PCV4 in Gansu Province, China, offering valuable insights for devising preventive and control strategies against this emerging virus.
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Affiliation(s)
- Peng-Fei Fu
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Yan-Hong Wang
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Guo Liu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, Gansu Province, China
| | - Dong-Mei Wang
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Wei-Wei Huang
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Duan-Qiang Guo
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Xin-Yang Li
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Ping Liu
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Meng-Xiang Wei
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Min Lu
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
| | - Jun Hong
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, China
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Zhang LH, Wang TX, Fu PF, Zhao YY, Li HX, Wang DM, Ma SJ, Chen HY, Zheng LL. First Molecular Detection and Genetic Analysis of a Novel Porcine Circovirus (Porcine Circovirus 4) in Dogs in the World. Microbiol Spectr 2023; 11:e0433322. [PMID: 36728419 PMCID: PMC10100769 DOI: 10.1128/spectrum.04333-22] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 01/11/2023] [Indexed: 02/03/2023] Open
Abstract
A novel circovirus species was identified in farmed pigs and designated porcine circovirus 4 (PCV4); it has recently been proved to be pathogenic to piglets. However, little is known about its cross-species transmission, and there is no evidence of PCV4 in dogs. A total of 217 fecal samples were collected from diarrheal dogs in Henan Province, China, and tested for the presence of PCV4 using a real-time PCR assay. Among the 217 samples, the total positivity rate for PCV4 was 5.99% (13/217 samples), with rates of 7.44% and 4.17% in 2020 and 2021, respectively. PCV4 was detected in dogs in 6 of 10 cities, demonstrating that PCV4 could be detected in dogs in Henan Province, China. One PCV4 strain (HN-Dog) was sequenced in this study and shared high levels of identity (97.9% to 99.6%) with reference strains at the genome level. Phylogenetic analysis based on complete genome sequences of HN-Dog and 42 reference strains showed that the HN-Dog strain was closely related to 3 PCV4 reference strains (from pig, raccoon dog, and fox) but differed genetically from other viruses in the genus Circovirus. Three genotypes, i.e., PCV4a, PCV4b, and PCV4c, were confirmed by phylogenetic analysis of complete genome sequences of 42 PCV4 strains, and one amino acid variation in Rep protein (V239L) and three amino acid variations in Cap protein (N27S, R28G, and M212L) were considered conserved genotype-specific molecular markers. In conclusion, the present study is the first to report the discovery of the PCV4 genome in dogs, and the association between PCV4 infection and diarrhea warrants further study. IMPORTANCE This study is the first to report the presence of PCV4 in dogs worldwide, and the first complete genome sequence was obtained from a dog affected with diarrhea. Three genotypes of PCV4 strains (PCV4a, PCV4b, and PCV4c) were determined, as supported by specific amino acid markers (V239L for open reading frame 1 [ORF1] and N27S R28G and M212L for ORF2). These findings help us understand the current status of intestinal infections in pet dogs in Henan Province, China, and also prompted us to accelerate research on the pathogenesis, epidemiology, and cross-species transmission of PCV4.
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Affiliation(s)
- Liu-Hui Zhang
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Tong-Xuan Wang
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Peng-Fei Fu
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, Henan Province, People’s Republic of China
| | - You-Yi Zhao
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Hong-Xuan Li
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Dong-Mei Wang
- Lushan Dabei Agriculture and Animal Husbandry Food Co., Ltd., Lushan, Henan Province, People’s Republic of China
| | - Shi-Jie Ma
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Hong-Ying Chen
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Lan-Lan Zheng
- International Joint Research Center of National Animal Immunology, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
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Tong C, Fu PF, Ming SL, Zeng L, Zhu HS, Wang J. Acute transcriptomic changes in murine RAW 264.7 cells following pseudorabies virus infection. Arch Virol 2022; 167:2623-2631. [PMID: 36269412 DOI: 10.1007/s00705-022-05598-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 02/14/2022] [Accepted: 07/29/2022] [Indexed: 12/14/2022]
Abstract
Next-generation sequencing enables the evaluation of gene expression changes resulting from virus-host interactions at the RNA level. Pseudorabies virus (PRV) causes substantial economic loss in the swine industry. Recent research has revealed that PRV can be transmitted to and infect humans as well. To identify physiopathological and pathological responses post-PRV infection, we characterized transcriptomic changes in the murine RAW 264.7 cell line over the course of 36 h. In total, 156, 153, and 190 differentially expressed genes were identified at 2 h, 12 h, and 36 h, respectively. Seven differentially expressed genes (Trim27, Ccdc117, Mrps12, Ccl4, Cerkl, Ubald1, and Hmga1-rs1) were present across all treatment groups. Our findings expand our knowledge of gene regulation and immune response following PRV infection. These differentially expressed genes can subsequently improve our understanding of PRV pathogenesis.
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Affiliation(s)
- Chao Tong
- College of Veterinary Medicine, Henan Agricultural University, 450000, Zhengzhou, Henan province, China.,Wuhu Overseas Student Pioneer Park, 241006, Wuhu, China
| | - Peng-Fei Fu
- College of Veterinary Medicine, Henan Agricultural University, 450000, Zhengzhou, Henan province, China.,Key Laboratory of Animal Biochemistry and Nutrition, Henan Agricultural University, Ministry of Agriculture and Rural Affairs of the People's Republic of China, 450046, Zhengzhou, Henan Province, China.,Key Laboratory of Animal Growth and Development, The Education Department of Henan Province, 450046, Zhengzhou, Henan Province, China
| | - Sheng-Li Ming
- College of Veterinary Medicine, Henan Agricultural University, 450000, Zhengzhou, Henan province, China.,Key Laboratory of Animal Biochemistry and Nutrition, Henan Agricultural University, Ministry of Agriculture and Rural Affairs of the People's Republic of China, 450046, Zhengzhou, Henan Province, China.,Key Laboratory of Animal Growth and Development, The Education Department of Henan Province, 450046, Zhengzhou, Henan Province, China
| | - Lei Zeng
- College of Veterinary Medicine, Henan Agricultural University, 450000, Zhengzhou, Henan province, China.,Key Laboratory of Animal Biochemistry and Nutrition, Henan Agricultural University, Ministry of Agriculture and Rural Affairs of the People's Republic of China, 450046, Zhengzhou, Henan Province, China.,Key Laboratory of Animal Growth and Development, The Education Department of Henan Province, 450046, Zhengzhou, Henan Province, China
| | - He-Shui Zhu
- College of Veterinary Medicine, Henan Agricultural University, 450000, Zhengzhou, Henan province, China. .,Key Laboratory of Animal Biochemistry and Nutrition, Henan Agricultural University, Ministry of Agriculture and Rural Affairs of the People's Republic of China, 450046, Zhengzhou, Henan Province, China. .,Key Laboratory of Animal Growth and Development, The Education Department of Henan Province, 450046, Zhengzhou, Henan Province, China.
| | - Jiang Wang
- College of Veterinary Medicine, Henan Agricultural University, 450000, Zhengzhou, Henan province, China. .,Key Laboratory of Animal Biochemistry and Nutrition, Henan Agricultural University, Ministry of Agriculture and Rural Affairs of the People's Republic of China, 450046, Zhengzhou, Henan Province, China. .,Key Laboratory of Animal Growth and Development, The Education Department of Henan Province, 450046, Zhengzhou, Henan Province, China.
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Yu PW, Fu PF, Zeng L, Qi YL, Li XQ, Wang Q, Yang GY, Li HW, Wang J, Chu BB, Wang MD. EGCG Restricts PRRSV Proliferation by Disturbing Lipid Metabolism. Microbiol Spectr 2022; 10:e0227621. [PMID: 35404086 PMCID: PMC9045245 DOI: 10.1128/spectrum.02276-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 03/20/2022] [Indexed: 12/30/2022] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) infection leads to late-term reproductive failure and respiratory illness that affect the global swine industry. Epigallocatechin gallate (EGCG) is a polyphenolic compound from green tea that exerts antiviral activity against diverse viruses. This study aimed to report an uncharacterized mechanism of how EGCG restricted PRRSV proliferation. EGCG showed no significant effects on cell viability, cell cycle progression, and apoptosis in porcine alveolar macrophages and MARC-145 cells. The treatment of cells with EGCG attenuated the replication of both highly pathogenic and less pathogenic PRRSV in vitro. The viral life cycle analysis demonstrated that EGCG affected PRRSV replication and assembly, but not viral attachment, entry, or release. Interestingly, EGCG treatment abrogated the increased lipid droplets formation and lipid content induced by PRRSV infection. We further demonstrated that EGCG blocked PRRSV-stimulated expression of the key enzymes in lipid synthesis. In addition, EGCG attenuated PRRSV-induced autophagy that is critical for PRRSV proliferation. The supplementation of oleic acid restored PRRSV replication and assembly under EGCG treatment. Together, our results support that EGCG inhibits PRRSV proliferation through disturbing lipid metabolism. IMPORTANCE Porcine reproductive and respiratory syndrome virus (PRRSV) is an enveloped single-positive-stranded RNA virus that causes acute respiratory distress in piglets and reproductive failure in sows, resulting in huge economic losses to the global swine industry. Several lines of evidence have suggested the crucial roles of lipids in PRRSV proliferation. Our previous report demonstrated that PRRSV activated lipophagy to facilitate viral replication through downregulating the expression of N-Myc downstream-regulated gene 1. The manipulation of lipid metabolism may be a new perspective to prevent PRRSV spread. In the present study, we reported that epigallocatechin-3-gallate (EGCG), the major component of green tea catechins, significantly attenuated PRRSV infection through inhibiting lipid synthesis and autophagy. Given that natural products derived from plants have helped in the prevention and treatment of various infectious diseases, EGCG has a great potential to serve as a safe and environmentally friendly natural compound to treat PRRSV infection.
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Affiliation(s)
- Peng-Wei Yu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Peng-Fei Fu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Lei Zeng
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Yan-Li Qi
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Xiu-Qing Li
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Qi Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Guo-Yu Yang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Hua-Wei Li
- School of Food and Bioengineering, Henan University of Animal Husbandry and Economy, Zhengzhou, Henan Province, People’s Republic of China
| | - Jiang Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
| | - Bei-Bei Chu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Zhengzhou, Henan Province, People’s Republic of China
- Key Laboratory of Animal Growth and Development, Zhengzhou, Henan Province, People’s Republic of China
- International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, Henan Province, People’s Republic of China
| | - Meng-Di Wang
- School of Food and Bioengineering, Henan University of Animal Husbandry and Economy, Zhengzhou, Henan Province, People’s Republic of China
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Gao BY, Cao YX, Fu PF, Xing Y, Liang D, Jiang S, Xie YX, Li M. Optogenetics stimulates nerve reorganization in the contralesional anterolateral primary motor cortex in a mouse model of ischemic stroke. Neural Regen Res 2021; 17:1535-1544. [PMID: 34916439 PMCID: PMC8771093 DOI: 10.4103/1673-5374.330615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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] [Indexed: 11/15/2022] Open
Abstract
The anterolateral motor cortex of rodents is an important motor auxiliary area, and its function is similar to that of the premotor area in humans. Activation and inhibition of the contralesional anterolateral motor cortex (cALM) have been shown to have direct effects on motor behavior. However, the significance of cALM activation and inhibition in the treatment of stroke remains unclear. This study investigated the role of optogenetic cALM stimulation in a mouse model of cerebral stroke. The results showed that 21-day optogenetic cALM inhibition, but not activation, improved neurological function. In addition, optogenetic cALM stimulation substantially altered dendritic structural reorganization and dendritic spine plasticity, as optogenetic cALM inhibition resulted in increased dendritic length, number of dendritic spines, and number of perforated synapses, whereas optogenetic activation led to an increase in the number of multiple synapse boutons and the number of dendritic intersections. Furthermore, RNA-seq analysis showed that multiple biological processes regulated by the cALM were upregulated immediately after optogenetic cALM inhibition, and that several immediate-early genes (including cFOS, Erg1, and Sema3f) were expressed at higher levels after optogenetic inhibition than after optogenetic activation. These results were confirmed by quantitative reverse transcription-polymerase chain reaction. Finally, immunofluorescence analysis showed that the c-FOS signal in layer V of the primary motor cortex in the ischemic hemisphere was higher after optogenetic cALM activation than it was after optogenetic cALM inhibition. Taken together, these findings suggest that optogenetic cALM stimulation promotes neural reorganization in the primary motor cortex of the ischemic hemisphere, and that optogenetic cALM inhibition and activation have different effects on neural plasticity. The study was approved by the Experimental Animal Ethics Committee of Fudan University (approval No. 201802173S) on March 3, 2018.
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Affiliation(s)
- Bei-Yao Gao
- Department of Rehabilitation Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Yi-Xing Cao
- Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai, China
| | - Peng-Fei Fu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Ying Xing
- Department of Rehabilitation, Huashan Hospital, Fudan University, Shanghai, China
| | - Dan Liang
- Department of Rehabilitation, Huashan Hospital, Fudan University, Shanghai, China
| | - Shan Jiang
- Department of Rehabilitation Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Yu-Xiao Xie
- Department of Rehabilitation Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Min Li
- Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai, China
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Fu PF, Cheng X, Su BQ, Duan LF, Wang CR, Niu XR, Wang J, Yang GY, Chu BB. CRISPR/Cas9-based generation of a recombinant double-reporter pseudorabies virus and its characterization in vitro and in vivo. Vet Res 2021; 52:95. [PMID: 34174954 PMCID: PMC8233574 DOI: 10.1186/s13567-021-00964-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 01/19/2021] [Accepted: 05/27/2021] [Indexed: 11/24/2022] Open
Abstract
Pseudorabies, caused by pseudorabies virus (PRV) variants, has broken out among commercial PRV vaccine-immunized swine herds and resulted in major economic losses to the pig industry in China since late 2011. However, the mechanism of virulence enhancement of variant PRV is currently unclear. Here, a recombinant PRV (rPRV HN1201-EGFP-Luc) with stable expression of enhanced green fluorescent protein (EGFP) and firefly luciferase as a double reporter virus was constructed on the basis of the PRV variant HN1201 through CRISPR/Cas9 gene-editing technology coupled with two sgRNAs. The biological characteristics of the recombinant virus and its lethality to mice were similar to those of the parental strain and displayed a stable viral titre and luciferase activity through 20 passages. Moreover, bioluminescence signals were detected in mice at 12 h after rPRV HN1201-EGFP-Luc infection. Using the double reporter PRV, we also found that 25-hydroxycholesterol had a significant inhibitory effect on PRV both in vivo and in vitro. These results suggested that the double reporter PRV based on PRV variant HN1201 should be an excellent tool for basic virology studies and evaluating antiviral agents.
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Affiliation(s)
- Peng-Fei Fu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Xuan Cheng
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Bing-Qian Su
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Li-Fang Duan
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Cong-Rong Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Xin-Rui Niu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Jiang Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Guo-Yu Yang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.
| | - Bei-Bei Chu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.
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Zheng HH, Wang LQ, Fu PF, Zheng LL, Chen HY, Liu F. Characterization of a recombinant pseudorabies virus expressing porcine parvovirus VP2 protein and porcine IL-6. Virol J 2020; 17:19. [PMID: 32014014 PMCID: PMC6998180 DOI: 10.1186/s12985-020-1292-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 09/19/2019] [Accepted: 01/23/2020] [Indexed: 12/18/2022] Open
Abstract
Background Porcine parvovirus (PPV) and pseudorabies virus (PRV) are the important etiological agents of swine infectious diseases, resulting in huge economic losses to the Chinese swine industry. Interleukin-6 (IL-6) has the roles to support host immune response to infections as a pleiotropic cytokine. It is essential to construct a live attenuated vaccine-based recombinant PRV that expresses PPV VP2 protein and porcine IL-6 for prevention and control of PRV and PPV. Methods The recombinant plasmid, pGVP2-IL6, was constructed by porcine IL-6 gene substituting for EGFP gene of the PRV transfer plasmid pGVP2-EGFP containing VP2 gene of PPV. Plasmid pGVP2-IL6 was transfected into swine testicle cells pre-infected with the virus rPRV-VP2-EGFP strain through homologous recombination and plaque purification to generate a recombinant virus rPRV-VP2-IL6. The recombinant PRV was further identified by PCR and DNA sequencing, and the expression of the VP2 protein and porcine IL-6 was analyzed by reverse transcription-PCR (RT-PCR) and Western blot. The virus titer was calculated according to Reed and Muench method. The immunogenicity of the recombinant virus was preliminarily evaluated in mice by intramuscular administration twice with the rPRV-VP2-IL6 at 4-week intervals. Results A recombinant virus rPRV-VP2-IL6 was successfully constructed and confirmed in this study. The properties of rPRV-VP2-IL6 were similar to the parental virus HB98 in terms of growth curve, morphogenesis and virus plaque sizes, and rPRV-VP2-IL6 was proliferated in different cell types. It induced specific antibodies against PPV as well as a strong increase of PPV-specific lymphocyte proliferation responses in mice immunized with rPRV-VP2-IL6, and provided partial protection against the virulent PPV challenge. rPRV-VP2-IL6 also induced a high level of neutralizing antibodies against PRV, and significantly reduced the mortality rate of (1 of 10) following virulent PRV challenge compared with the control (10 of 10). Conclusions The recombinant rPRV-VP2-IL6 might be a potential candidate vaccine against PRV and PPV infections in pigs.
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Affiliation(s)
- Hui-Hua Zheng
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengdong New District Longzi Lake#15, 450046, Zhengzhou, Henan Province, People's Republic of China
| | - Lin-Qing Wang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengdong New District Longzi Lake#15, 450046, Zhengzhou, Henan Province, People's Republic of China.,Department of Life Science, Zhengzhou Normal University, Zhengzhou, 450044, Henan Province, People's Republic of China
| | - Peng-Fei Fu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengdong New District Longzi Lake#15, 450046, Zhengzhou, Henan Province, People's Republic of China
| | - Lan-Lan Zheng
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengdong New District Longzi Lake#15, 450046, Zhengzhou, Henan Province, People's Republic of China
| | - Hong-Ying Chen
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengdong New District Longzi Lake#15, 450046, Zhengzhou, Henan Province, People's Republic of China.
| | - Fang Liu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengdong New District Longzi Lake#15, 450046, Zhengzhou, Henan Province, People's Republic of China.
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Chen GL, Fu PF, Wang LQ, Li XS, Chen HY. Immune responses of piglets immunized by a recombinant plasmid containing porcine circovirus type 2 and porcine interleukin-18 genes. Viral Immunol 2015; 27:521-8. [PMID: 25268976 DOI: 10.1089/vim.2014.0036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, two recombinant plasmids containing the ORF2 gene of porcine circovirus type 2 (PCV2) with or without porcine interleukin-18 (IL-18) were constructed and evaluated for their ability to protect piglets against PCV2 challenge. Transient expression of the plasmids in PK-15 cells could be detected using Western blot. Piglets were given two intramuscular immunizations 3 weeks apart and were challenged with a virulent Wuzhi strain of PCV2 at 42 days after the initial immunization. All animals vaccinated with pBudCE4.1-ORF2 or with pBudCE4.1-ORF2/IL18 developed PCV2-specific antibody and T-lymphocyte proliferative responses. The levels of T-lymphocyte proliferation in piglets immunized with pBudCE4.1-ORF2/IL18 were significantly higher than in those immunized with pBudCE4.1-ORF2, and pBudCE4.1-ORF2/IL18 stimulated a significantly increased production of IFN-γ and IL-2. Furthermore, PCV2 challenge experiments showed that the DNA vaccine-immunized groups can partially prevent PCV2 viremia and significantly reduce the amount of PCV2 virus in the lymphoid tissues, and the piglets immunized by pBudCE4.1-ORF2/IL18 exhibit a marked inhibition of PCV2 replication compared to the pBudCE4.1-ORF2 group. These data demonstrate that the plasmid pBudCE4.1-ORF2/IL18 may be an effective approach for increasing PCV2 DNA vaccine immunogenicity.
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Affiliation(s)
- Guang-Lei Chen
- 1 College of Animal Science and Veterinary Medicine, Henan Agricultural University , Zhengzhou, Henan Province, People's Republic of China
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Cao X, Chen Y, Chai W, Zhang W, Wang Y, Fu PF. Thermoresponsive self-assembled nanovesicles based on amphiphilic triblock copolymers and their potential applications as smart drug release carriers. J Appl Polym Sci 2014. [DOI: 10.1002/app.41361] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Xia Cao
- School of Material Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Yunxiang Chen
- School of Material Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Wenchao Chai
- School of Material Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Wenjie Zhang
- School of Material Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Yudong Wang
- School of Material Science and Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Peng-Fei Fu
- Dow Corning Corporation; Midland Michigan 48686
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Ma SJ, Li K, Li XS, Guo XQ, Fu PF, Yang MF, Chen HY. Expression of bioactive porcine interferon-alpha in Lactobacillus casei. World J Microbiol Biotechnol 2014; 30:2379-86. [PMID: 24818858 DOI: 10.1007/s11274-014-1663-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 05/03/2014] [Indexed: 12/29/2022]
Abstract
In this study, we constructed an expression cassette containing the inducible lac promoter and the secretion signal from an S-layer protein of Lactobacillus brevis for the expression of porcine interferon-alpha (IFN-α) in Lactobacillus casei (Lb. casei). Reverse-transcriptase PCR verified the presence of porcine IFN-α mRNA in the recombinant Lb. casei. The porcine IFN-α protein expressed in the recombinant Lb. casei was identified by both Western blot analysis and ELISA. We used various pH values and induction times to optimize the yield of IFN-α, and found that induction with 0.8% lactose for 16 h under anaerobic conditions produced the highest concentrations of IFN-α. Furthermore, the activity of porcine IFN-α in the cultural supernatant was evaluated on ST cells infected with pseudorabies virus. The results revealed that porcine IFN-α inhibited virus replication in vitro. The findings of our study indicate that recombinant Lb. casei producing porcine IFN-α has great potential for use as a novel oral antiviral agent in animal healthcare.
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Affiliation(s)
- Shi-jie Ma
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Nongye Road 63#, Zhengzhou, 450002, Henan Province, People's Republic of China
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Pina-Hernandez C, Fu PF, Guo LJ. Ultrasmall structure fabrication via a facile size modification of nanoimprinted functional silsesquioxane features. ACS Nano 2011; 5:923-31. [PMID: 21210695 DOI: 10.1021/nn102127z] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We propose a simple and robust scheme for a precise and controlled fabrication of ultrasmall structures through the direct size modification (either reduction or increment) of functional nanoimprinted silsesquioxane (SSQ) patterns. The size modification of nanopatterned SSQ polymer features was achieved according to two different independent approaches. In the first approach, feature size was reduced by a simple heat-induced mass loss mechanism; in the second approach structure size increment was achieved by building multiple polymeric layers on top of imprinted patterns. The fabricated arrays follow the shape contour of the patterned structures so the original imprinted profile is preserved. The engineered capabilities were applied to produce high resolution stamps for nanoimprinting. These approaches free the need for sophisticated nanofabrication techniques and expensive facilities required for nanopatterning.
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Affiliation(s)
- Carlos Pina-Hernandez
- Macromolecular Science and Engineering, The University of Michigan , Ann Arbor, Michigan 48109, USA
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Pina-Hernandez C, Guo LJ, Fu PF. High-resolution functional epoxysilsesquioxane-based patterning layers for large-area nanoimprinting. ACS Nano 2010; 4:4776-4784. [PMID: 20731453 DOI: 10.1021/nn100478a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Epoxysilsesquioxane (SSQ)-based materials have been developed as patterning layers for large-area and high-resolution nanoimprinting. The SSQ polymers, poly(methyl-co-3-glycidoxypropyl) silsesquioxanes (T(Me)T(Ep)), poly(phenyl-co-3-glycidoxypropyl) silsesquioxanes (T(Ph)T(Ep)), and poly(phenyl-co-3-glycidoxypropyl-co-perfluorooctyl) silsesquioxanes (T(Ph)T(Ep)T(Fluo)), were precisely designed and synthesized by incorporating the necessary functional groups onto the SSQ backbone. The materials possess a variety of characteristics desirable for NIL, such as great coatability, high modulus, good mold release, and excellent dry etch resistance. In particular, the presence of epoxy functional groups allows the resists to be solidified within seconds under UV exposure at room temperature, and the presence of the fluoroalkyl groups in the SSQ resins greatly facilitate mold release after the imprint process. In addition, the absence of metal in the resins makes the materials highly compatible with applications involving Si CMOS integrated circuits fabrication.
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Feng SM, Gan ZJ, Zhai XF, Fu PF, Sun WJ. [Content comparison of pinoresinol diglucoside in original and reborn bark of Eucommia ulmoides]. Zhong Yao Cai 2006; 29:792-4. [PMID: 17076238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
OBJECTIVE To evaluate the reborn barks quality, antihypertensive effective component of pinoresnol diglucoside (PDG) in three times reborn barks were determined. METHODS A YWG C18 column (10 microm, 250 x 4.6 mm) was used with a mobile phase of methanol-water (30:75) and flow rate of 1.0 (ml/min). The detective wave-length was set at 277nm and the column temperature at room temperature. RESULTS PDG in the first reborn barks are slightly higher than the original ones, and in the second reborn barks are similar with the barks before girdling (the fist reborn barks), but in the third reborn barks, PDG are much lower than the barks before girdling (the second reborn barks). CONCLUSION In order to ensure reborn barks quality, we suggest that the girdling bark regeneration can be made two times, the time between the first and the second girdling is not less than five years. PDG in the third reborn barks should be enhanced.
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Affiliation(s)
- Suo-Min Feng
- Biology and Medicine Key Laboratory of Northwest University, Xi'an 710069, China
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Wan Y, Yang L, Zhang J, Zhang P, Fu PF, Zhang T, Xie P, Zhang R. Template of Concerted CT and H-Bonding Interactions-Directed Synthesis of a Highly Soluble and Perfect Organo-Bridged Ladder Polymethylsiloxane. Macromolecules 2005. [DOI: 10.1021/ma0510800] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | - Peng-Fei Fu
- Dow Corning Corporation, Midland, Michigan 48686
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Liu YF, Zhao D, Sun YA, Yang RN, Fu PF. Synthesis of a binuclear copper(I) complex [Cu 2(PPh 3) 6( k-OOCH)](ClO 4) – insertion reaction of carbon dioxide. J COORD CHEM 2005. [DOI: 10.1080/00958970512331325548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ying-Fan Liu
- a Zhengzhou Institute of Light Industry , Zhengzhou 450002, P.R. China
| | - Dong Zhao
- b Henan Institute of Chemistry , Zhengzhou 450002, P.R. China
| | - Yu-An Sun
- a Zhengzhou Institute of Light Industry , Zhengzhou 450002, P.R. China
| | - Rui-Na Yang
- b Henan Institute of Chemistry , Zhengzhou 450002, P.R. China
| | - Peng-Fei Fu
- b Henan Institute of Chemistry , Zhengzhou 450002, P.R. China
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Affiliation(s)
- Peng-Fei Fu
- Dow Corning Corporation, Midland, Michigan 48686
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Sun J, Tang H, Jiang J, Xie P, Zhang R, Fu PF, Wu Q. H-bonding assisted template synthesis of a novel ladder-like organo-bridged polymethylsiloxane. POLYMER 2003. [DOI: 10.1016/s0032-3861(03)00210-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sun J, Tang H, Jiang J, Zhou X, Xie P, Zhang R, Fu PF. Hydrogen-bonding-aided synthesis of novel ladderlike organobridged polysiloxane containing side-chain naphthyl groups. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/pola.10607] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Li Y, Fu PF, Marks TJ. Organolanthanide-Catalyzed Carbon-Heteroatom Bond Formation. Observations on the Facile, Regiospecific Cyclization of Aminoalkynes. Organometallics 2002. [DOI: 10.1021/om00014a015] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yang X, Seyam AM, Fu PF, Mark TJ. exo-Methylene-Functionalized Polyethylenes via Ring-Opening Ziegler Polymerization. Product Control in Organolanthanide-Catalyzed Methylenecyclopropane Polymerization/Copolymerization. Macromolecules 2002. [DOI: 10.1021/ma00094a030] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fu PF, Brard L, Li Y, Marks TJ. Regioselection and Enantioselection in Organolanthanide-Catalyzed Olefin Hydrosilylation. A Kinetic and Mechanistic Study. J Am Chem Soc 2002. [DOI: 10.1021/ja00132a015] [Citation(s) in RCA: 244] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fu PF, Marks TJ. Silanes as Chain Transfer Agents in Metallocene-Mediated Olefin Polymerization. Facile in Situ Catalytic Synthesis of Silyl-Terminated Polyolefins. J Am Chem Soc 2002. [DOI: 10.1021/ja00148a019] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Koo K, Fu PF, Marks TJ. Organolanthanide-Mediated Silanolytic Chain Transfer Processes. Scope and Mechanism of Single Reactor Catalytic Routes to Silapolyolefins. Macromolecules 1999. [DOI: 10.1021/ma981462o] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kwangmo Koo
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Peng-Fei Fu
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
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Chen YX, Fu PF, Stern CL, Marks TJ. A Novel Phenolate “Constrained Geometry” Catalyst System. Efficient Synthesis, Structural Characterization, and α-Olefin Polymerization Catalysis. Organometallics 1997. [DOI: 10.1021/om9707376] [Citation(s) in RCA: 131] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- You-Xian Chen
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Peng-Fei Fu
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Charlotte L. Stern
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
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Jia L, Yang X, Seyam AM, Albert IDL, Fu PF, Yang S, Marks TJ. Ring-Opening Ziegler Polymerization of Methylenecycloalkanes Catalyzed by Highly Electrophilic d0/fn Metallocenes. Reactivity, Scope, Reaction Mechanism, and Routes to Functionalized Polyolefins. J Am Chem Soc 1996. [DOI: 10.1021/ja960811w] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li Jia
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
| | - Xinmin Yang
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
| | - Affif M. Seyam
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
| | - Israel D. L. Albert
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
| | - Peng-Fei Fu
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
| | - Shengtian Yang
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
| | - Tobin J. Marks
- Contribution from the Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113
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