1
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Le TTH, Than TT, Lai TNH, Le VP. Stixis scandens leaf extract-loading ZnO nanoparticles for porcine epidemic diarrhea virus (PEDV) treatment. RSC Adv 2024; 14:8779-8789. [PMID: 38495987 PMCID: PMC10938554 DOI: 10.1039/d3ra08928b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/09/2024] [Indexed: 03/19/2024] Open
Abstract
Porcine epidemic diarrhea (PED) is one of the diseases that causes great losses for livestock farmers. Because vaccines against the disease are not very effective, there is a great demand for biological products with effective resistance to PED virus (PEDV). One of the most important trends today is the use of active ingredients from nature in animal husbandry. This study aimed to create an effective agent against PEDV from the extract of Stixis scandens, which has been shown to inhibit PEDV. The aqueous (denoted as TCN) and ethanolic extracts (denoted as TCC) of Stixis scandens leaves were first prepared and then qualitatively analyzed for their chemical compositions. The TCN was used to synthesize ZnO nanoparticles (NPs) at various sizes from 20 to 120 nm. Subsequently, TCC was loaded on ZnO NPs to form ZnO-extract nanoformulations with an extract loading content of 5.8-7.6%. Total polyphenols (TP) and total alkaloids (TA) in TCC were 38.51 ± 0.25 μg GAE per mg and 22.37 ± 0.41 μg AtrE per mg, respectively. TP was less loaded but more released from the nanoformulations than TA. The A1T nanoformulation, containing only 7.6% extract, had a minimum PEDV inhibitory concentration of 3.9 μg mL-1, which was comparable to that of TCC. The experiments confirmed that the nanoformulations are promising for PEDV inhibition applications.
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Affiliation(s)
- Thi Thu Huong Le
- Faculty of Natural Resources and Environment, Vietnam National University of Agriculture Trau Quy, Gia Lam Hanoi Vietnam
| | - Thi Tam Than
- Institute of Veterinary Science and Technology Trau Quy, Gia Lam Hanoi Vietnam
| | - Thi Ngọc Ha Lai
- College of Veterinary Medicine, Vietnam National University of Agriculture Hanoi Vietnam
| | - Van Phan Le
- College of Veterinary Medicine, Vietnam National University of Agriculture Hanoi Vietnam
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Suo X, Wang J, Wang D, Fan G, Zhu M, Fan B, Yang X, Li B. DHA and EPA inhibit porcine coronavirus replication by alleviating ER stress. J Virol 2023; 97:e0120923. [PMID: 37843366 PMCID: PMC10688372 DOI: 10.1128/jvi.01209-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 09/12/2023] [Indexed: 10/17/2023] Open
Abstract
IMPORTANCE Porcine epidemic diarrhea caused by porcine coronaviruses remains a major threat to the global swine industry. Fatty acids are extensively involved in the whole life of the virus. In this study, we found that docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) significantly reduced the viral load of porcine epidemic diarrhea virus (PEDV), transmissible gastroenteritis virus (TGEV), and porcine delta coronavirus (PDCoV) and acted on the replication of the viruses rather than attachment and entry. We further confirmed that DHA and EPA inhibited PEDV replication by alleviating the endoplasmic reticulum stress. Meanwhile, DHA and EPA alleviate PEDV-induced inflammation and reactive oxygen species (ROS) levels and enhance the cellular antioxidant capacity. These data indicate that DHA and EPA have antiviral effects on porcine coronaviruses and provide a molecular basis for the development of new fatty acid-based therapies to control porcine coronavirus infection and transmission.
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Affiliation(s)
- Xiaoyi Suo
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Jing Wang
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Danping Wang
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Guoqiang Fan
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Mingjun Zhu
- Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Veterinary Medicine, Nanjing, Jiangsu, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonoses, Yangzhou University, Yangzhou, Jiangsu, China
| | - Baochao Fan
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
- Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Veterinary Medicine, Nanjing, Jiangsu, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonoses, Yangzhou University, Yangzhou, Jiangsu, China
| | - Xiaojing Yang
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Bin Li
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing, Jiangsu, China
- Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Veterinary Medicine, Nanjing, Jiangsu, China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Jiangsu Key Laboratory of Zoonoses, Yangzhou University, Yangzhou, Jiangsu, China
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Li Y, Bao Y, Li Y, Duan X, Dong S, Lin J, Chang X, Tan Y, Zhang H, Shan H. RSL3 Inhibits Porcine Epidemic Diarrhea Virus Replication by Activating Ferroptosis. Viruses 2023; 15:2080. [PMID: 37896857 PMCID: PMC10612067 DOI: 10.3390/v15102080] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/08/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is a highly contagious coronavirus that induces diarrhea and death in neonatal piglets, resulting in substantial economic losses to the global swine industry. The mechanisms of PEDV infection and the roles of host factors are still under exploration. In this study, we used the ferroptosis pathway downstream target activator (1S,3R)-RSL3 compound as a starting point, combined with the interactions of N-acetylcysteine and deferoxamine, to elucidate the effects of a series of compounds on PEDV proliferation. We also established glutathione peroxidase 4 (GPX4) gene overexpression to further elucidate the relationship between the ferroptosis pathway and PEDV. (1S,3R)-RSL3 inhibited PEDV replication in Vero cells, while N-acetylcysteine and deferoxamine promoted its proliferation. In addition, (1S,3R)-RSL3 mainly affected the replication stage of PEDV. Overexpression of GPX4 promoted PEDV proliferation, indicating that the ferroptosis pathway could influence PEDV replication in Vero cells. This study focused on the mechanism of (1S,3R)-RSL3 inhibition on PEDV, laying the foundation for exploring the pathogenic mechanisms of PEDV and drug development.
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Affiliation(s)
- Yingguang Li
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Yuwei Bao
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Yan Li
- Qingdao Animal Disease Prevention and Control Center, Qingdao 266100, China; (Y.L.); (X.D.)
| | - Xiaoxiao Duan
- Qingdao Animal Disease Prevention and Control Center, Qingdao 266100, China; (Y.L.); (X.D.)
| | - Shaoming Dong
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Jiaxu Lin
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Xiaoyun Chang
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Yue Tan
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Hongliang Zhang
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
| | - Hu Shan
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.B.); (S.D.); (J.L.); (X.C.); (Y.T.); (H.S.)
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Zhang H, Li Y, Yang R, Xiao L, Dong S, Lin J, Liu G, Shan H. Erastin inhibits porcine epidemic diarrhea virus replication in Vero cells. Front Cell Infect Microbiol 2023; 13:1142173. [PMID: 36936772 PMCID: PMC10015705 DOI: 10.3389/fcimb.2023.1142173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/17/2023] [Indexed: 03/08/2023] Open
Abstract
Background Porcine epidemic diarrhea virus (PEDV), an intestinal pathogenic coronavirus, has caused significant economic losses to the swine industry worldwide. At present, there are several treatment methods, but there is still a lack of clinically effective targeted drugs, new antiviral mechanisms and drugs need to be explored. Methods In this study, we established a model of erastin versus ferrostatin-1 treatment of Vero cells, and then detected virus proliferation and gene expression by RT-qPCR through PEDV infection experiments. Results We demonstrated for the first time that erastin significantly inhibited the replication of PEDV upon entry into cells; Vero treated with erastin significantly regulated the expression of three genes, NRF2, ACSL4 and GPX4, notably erastin regulated the expression of these three genes negatively correlated with the expression induced by PEDV virus infection. Conclusions Since NRF2, ACSL4 and GPX4 are classical Ferroptosis genes, this study speculates that erastin may inhibit the replication of PEDV in Vero cells in part through the regulation of ferroptosis pathway, and erastin may be a potential drug for the treatment of PEDV infection.
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Affiliation(s)
- Hongliang Zhang
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
| | - Yingguang Li
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
| | - Ruimei Yang
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
| | - Ling Xiao
- Animal Husbandry and Veterinary Station of Rushanzhai Town, Rushan Animal Husbandry Development Center, Weihai, China
| | - Shaoming Dong
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
| | - Jiaxu Lin
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
| | - Gang Liu
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
- *Correspondence: Gang Liu, ; Hu Shan,
| | - Hu Shan
- College of Veterinary Medicine, Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, Qingdao Agricultural University, Qingdao, China
- *Correspondence: Gang Liu, ; Hu Shan,
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A Review of Bioactive Compounds against Porcine Enteric Coronaviruses. Viruses 2022; 14:v14102217. [PMID: 36298772 PMCID: PMC9607050 DOI: 10.3390/v14102217] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/06/2022] [Accepted: 10/07/2022] [Indexed: 11/15/2022] Open
Abstract
Pig diarrhea is a universal problem in the process of pig breeding, which seriously affects the development of the pig industry. Porcine enteric coronaviruses (PECoVs) are common pathogens causing diarrhea in pigs, currently including transmissible gastroenteritis virus (TGEV), porcine epidemic diarrhea virus (PEDV), porcine deltacoronavirus (PDCoV) and swine acute diarrhea syndrome coronavirus (SADS-CoV). With the prosperity of world transportation and trade, the spread of viruses is becoming wider and faster, making it even more necessary to prevent PECoVs. In this paper, the host factors required for the efficient replication of these CoVs and the compounds that exhibit inhibitory effects on them were summarized to promote the development of drugs against PECoVs. This study will be also helpful in discovering general host factors that affect the replication of CoVs and provide references for the prevention and treatment of other CoVs.
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Wang P, Wang X, Liu X, Sun M, Liang X, Bai J, Jiang P. Natural Compound ZINC12899676 Reduces Porcine Epidemic Diarrhea Virus Replication by Inhibiting the Viral NTPase Activity. Front Pharmacol 2022; 13:879733. [PMID: 35600889 PMCID: PMC9114645 DOI: 10.3389/fphar.2022.879733] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is an alphacoronavirus (α-CoV) that causes high mortality in suckling piglets, leading to severe economic losses worldwide. No effective vaccine or commercial antiviral drug is readily available. Several replicative enzymes are responsible for coronavirus replication. In this study, the potential candidates targeting replicative enzymes (PLP2, 3CLpro, RdRp, NTPase, and NendoU) were screened from 187,119 compounds in ZINC natural products library, and seven compounds had high binding potential to NTPase and showed drug-like property. Among them, ZINC12899676 was identified to significantly inhibit the NTPase activity of PEDV by targeting its active pocket and causing its conformational change, and ZINC12899676 significantly inhibited PEDV replication in IPEC-J2 cells. It first demonstrated that ZINC12899676 inhibits PEDV replication by targeting NTPase, and then, NTPase may serve as a novel target for anti-PEDV.
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Affiliation(s)
- Pengcheng Wang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Xianwei Wang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Xing Liu
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Meng Sun
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Xiao Liang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Juan Bai
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Ping Jiang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
- *Correspondence: Ping Jiang,
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Zeng W, Ren J, Li Z, Jiang C, Sun Q, Li C, Li W, Li W, He Q. Levistolide A Inhibits PEDV Replication via Inducing ROS Generation. Viruses 2022; 14:v14020258. [PMID: 35215851 PMCID: PMC8878026 DOI: 10.3390/v14020258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/24/2022] [Accepted: 01/24/2022] [Indexed: 11/16/2022] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) variant strains adversely affect the production of pigs globally. Vaccines derived from PEDV traditional strains impart less protection against the variant strains. Moreover, sequence diversity among different PEDV variant strains is also complicated. This necessitates developing alternative antiviral strategies for defending against PEDV. This study explored a natural product, Levistolide A (LA), to possess antiviral activity against PEDV. LA was found to suppress PEDV replication in a dose-dependent manner. And the inhibitory effect of LA against PEDV was maintained in the course of time. In terms of viral RNA and protein production, LA also showed a strong inhibitory effect. In addition, LA was indicated to inhibit PEDV from attaching to the cellular membrane or penetrating the cells. Further study revealed that LA can induce the generation of reactive oxygen species (ROS), and the corresponding inhibitor, NAC, was found to antagonize the effect of LA on inhibiting PEDV replication. This illustrated that the LA-induced ROS generation played an important role in its anti-PEDV activity. LA was also identified to stimulate ER stress, which is an important consequence of ROS production and was proven to be able to inhibit PEDV replication. To conclude, this study revealed that LA can inhibit PEDV replication via inducing ROS generation.
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Affiliation(s)
- Wei Zeng
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingping Ren
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhonghua Li
- Hubei Key Laboratory of Animal Nutrition and Feed Science, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
| | - Changsheng Jiang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Qi Sun
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Chang Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Wan Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Wentao Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
| | - Qigai He
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (W.Z.); (J.R.); (C.J.); (Q.S.); (C.L.); (W.L.); (W.L.)
- The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China
- Correspondence:
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Dudev T, Cheshmedzhieva D, Dorkov P, Pantcheva I. A DFT/PCM Study on the Affinity of Salinomycin to Bind Monovalent Metal Cations. Molecules 2022; 27:532. [PMID: 35056843 PMCID: PMC8779476 DOI: 10.3390/molecules27020532] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/08/2022] [Accepted: 01/11/2022] [Indexed: 11/29/2022] Open
Abstract
The affinity of the polyether ionophore salinomycin to bind IA/IB metal ions was accessed using the Gibbs free energy of the competition reaction between SalNa (taken as a reference) and its rival ions: [M+-solution] + [SalNa] → [SalM] + [Na+-solution] (M = Li, K, Rb, Cs, Cu, Ag, Au). The DFT/PCM computations revealed that the ionic radius, charge density and accepting ability of the competing metal cations, as well as the dielectric properties of the solvent, have an influence upon the selectivity of salinomycin. The optimized structures of the monovalent metal complexes demonstrate the flexibility of the ionophore, allowing the coordination of one or two water ligands in SalM-W1 and SalM-W2, respectively. The metal cations are responsible for the inner coordination sphere geometry, with coordination numbers spread between 2 (Au+), 4 (Li+ and Cu+), 5/6 (Na+, K+, Ag+), 6/7 (Rb+) and 7/8 (Cs+). The metals' affinity to salinomycin in low-polarity media follows the order of Li+ > Cu+ > Na+ > K+ > Au+ > Ag+ > Rb+ > Cs+, whereas some derangement takes place in high-dielectric environment: Li+ ≥ Na+ > K+ > Cu+ > Au+ > Ag+ > Rb+ > Cs+.
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Affiliation(s)
- Todor Dudev
- Laboratory of Computational Chemistry and Spectroscopy, Faculty of Chemistry and Pharmacy, “St. Kl. Ohridski” University of Sofia, 1164 Sofia, Bulgaria;
| | - Diana Cheshmedzhieva
- Laboratory of Computational Chemistry and Spectroscopy, Faculty of Chemistry and Pharmacy, “St. Kl. Ohridski” University of Sofia, 1164 Sofia, Bulgaria;
| | - Peter Dorkov
- Research & Development Department, Biovet Ltd., 4550 Peshtera, Bulgaria;
| | - Ivayla Pantcheva
- Laboratory of Biocoordination and Bioanalytical Chemistry, Faculty of Chemistry and Pharmacy, “St. Kl. Ohridski” University of Sofia, 1164 Sofia, Bulgaria
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Construction of a Recombinant Porcine Epidemic Diarrhea Virus Encoding Nanoluciferase for High-Throughput Screening of Natural Antiviral Products. Viruses 2021; 13:v13091866. [PMID: 34578449 PMCID: PMC8473292 DOI: 10.3390/v13091866] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/09/2021] [Accepted: 09/14/2021] [Indexed: 02/06/2023] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is the predominant cause of an acute, highly contagious enteric disease in neonatal piglets. There are currently no approved drugs against PEDV infection. Here, we report the development of a nanoluciferase (NLuc)-based high-throughput screening (HTS) platform to identify novel anti-PEDV compounds. We constructed a full-length cDNA clone for a cell-adapted PEDV strain YN150. Using reverse genetics, we replaced the open reading frame 3 (ORF3) in the viral genome with an NLuc gene to engineer a recombinant PEDV expressing NLuc (rPEDV-NLuc). rPEDV-NLuc produced similar plaque morphology and showed similar growth kinetics compared with the wild-type PEDV in vitro. Remarkably, the level of luciferase activity could be stably detected in rPEDV-NLuc-infected cells and exhibited a strong positive correlation with the viral titers. Given that NLuc expression represents a direct readout of PEDV replication, anti-PEDV compounds could be easily identified by quantifying the NLuc activity. Using this platform, we screened for the anti-PEDV compounds from a library of 803 natural products and identified 25 compounds that could significantly inhibit PEDV replication. Interestingly, 7 of the 25 identified compounds were natural antioxidants, including Betulonic acid, Ursonic acid, esculetin, lithocholic acid, nordihydroguaiaretic acid, caffeic acid phenethyl ester, and grape seed extract. As expected, all of the antioxidants could potently reduce PEDV-induced oxygen species production, which, in turn, inhibit PEDV replication in a dose-dependent manner. Collectively, our findings provide a powerful platform for the rapid screening of promising therapeutic compounds against PEDV infection.
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