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Huang QL, Huang LN, Zhao GY, Liu C, Pan XY, Li ZR, Jing XH, Qiu ZY, Xin RH. Naringin attenuates Actinobacillus pleuropneumoniae-induced acute lung injury via MAPK/NF-κB and Keap1/Nrf2/HO-1 pathway. BMC Vet Res 2024; 20:204. [PMID: 38755662 PMCID: PMC11100192 DOI: 10.1186/s12917-024-04055-2] [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: 11/09/2023] [Accepted: 05/03/2024] [Indexed: 05/18/2024] Open
Abstract
Actinobacillus pleuropneumoniae (APP) causes porcine pleuropneumonia (PCP), which is clinically characterized by acute hemorrhagic, necrotizing pneumonia, and chronic fibrinous pneumonia. Although many measures have been taken to prevent the disease, prevention and control of the disease are becoming increasingly difficult due to the abundance of APP sera, weak vaccine cross-protection, and increasing antibiotic resistance in APP. Therefore, there is an urgent need to develop novel drugs against APP infection to prevent the spread of APP. Naringin (NAR) has been reported to have an excellent therapeutic effect on pulmonary diseases, but its therapeutic effect on lung injury caused by APP is not apparent. Our research has shown that NAR was able to alleviate APP-induced weight loss and quantity of food taken and reduce the number of WBCs and NEs in peripheral blood in mice; pathological tissue sections showed that NAR was able to prevent and control APP-induced pathological lung injury effectively; based on the establishment of an in vivo/in vitro model of APP inflammation, it was found that NAR was able to play an anti-inflammatory role through inhibiting the MAPK/NF-κB signaling pathway and exerting anti-inflammatory effects; additionally, NAR activating the Nrf2 signalling pathway, increasing the secretion of antioxidant enzymes Nqo1, CAT, and SOD1, inhibiting the secretion of oxidative damage factors NOS2 and COX2, and enhancing the antioxidant stress ability, thus playing an antioxidant role. In summary, NAR can relieve severe lung injury caused by APP by reducing excessive inflammatory response and improving antioxidant capacity.
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Affiliation(s)
- Qi-Lin Huang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China
| | - Li-Na Huang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou Gansu, 730000, China
| | - Guan-Yu Zhao
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou Gansu, 730000, China
| | - Chen Liu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China
| | - Xiang-Yi Pan
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China
| | - Zhao-Rong Li
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China
| | - Xiao-Han Jing
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China
| | - Zheng-Ying Qiu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China.
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China.
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China.
| | - Rui-Hua Xin
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou Gansu, 730000, China.
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou Gansu, 730000, China.
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of P.R, Lanzhou Gansu, 730000, China.
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Bui DT, Lee YS, Kuo TF, Chen ZW, Yang WC. Novel Experimental Mouse Model to Study the Pathogenesis and Therapy of Actinobacillus pleuropneumoniae Infection. Pathogens 2024; 13:412. [PMID: 38787263 PMCID: PMC11123673 DOI: 10.3390/pathogens13050412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/12/2024] [Accepted: 05/14/2024] [Indexed: 05/25/2024] Open
Abstract
Actinobacillus pleuropneumoniae (APP) is a major cause of lung infections in pigs. An experimental mouse has the edge over pigs pertaining to the ease of experimental operation, disease study and therapy, abundance of genetic resources, and cost. However, it is a challenge to introduce APP into a mouse lung due to the small respiratory tract of mice and bacterial host tropism. In this study, an effective airborne transmission of APP serovar 1 (APP1) was developed in mice for lung infection. Consequently, APP1 infected BALB/c mice and caused 60% death within three days of infection at the indicated condition. APP1 seemed to enter the lung and, in turn, spread to other organs of the mice over the first 5 days after infection. Accordingly, APP1 damaged the lung as evidenced by its morphological and histological examinations. Furthermore, ampicillin fully protected mice against APP1 as shown by their survival, clinical symptoms, body weight loss, APP1 count, and lung damages. Finally, the virulence of two extra APP strains, APP2 and APP5, in the model was compared based on the survival rate of mice. Collectively, this study successfully established a fast and reliable mouse model of APP which can benefit APP research and therapy. Such a model is a potentially useful model for airway bacterial infections.
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Affiliation(s)
- Duc-Thang Bui
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei City 115, Taiwan; (D.-T.B.); (Y.-S.L.); (T.-F.K.)
- Institute of Biotechnology, National Taiwan University, Taipei City 106, Taiwan
| | - Yi-San Lee
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei City 115, Taiwan; (D.-T.B.); (Y.-S.L.); (T.-F.K.)
- Institute of Biotechnology, National Taiwan University, Taipei City 106, Taiwan
| | - Tien-Fen Kuo
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei City 115, Taiwan; (D.-T.B.); (Y.-S.L.); (T.-F.K.)
| | - Zeng-Weng Chen
- Animal Technology Research Center, Agricultural Technology Research Institute, Miaoli County 350, Taiwan;
| | - Wen-Chin Yang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei City 115, Taiwan; (D.-T.B.); (Y.-S.L.); (T.-F.K.)
- Institute of Biotechnology, National Taiwan University, Taipei City 106, Taiwan
- Department of Life Sciences, National Taiwan Ocean University, Keelung City 202, Taiwan
- Graduate Institute of Integrated Medicine, China Medical University, Taichung City 404, Taiwan
- Department of Life Sciences, National Chung-Hsing University, Taichung City 404, Taiwan
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3
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Huang Q, Li W, Jing X, Liu C, Ahmad S, Huang L, Zhao G, Li Z, Qiu Z, Xin R. Naringin's Alleviation of the Inflammatory Response Caused by Actinobacillus pleuropneumoniae by Downregulating the NF-κB/NLRP3 Signalling Pathway. Int J Mol Sci 2024; 25:1027. [PMID: 38256101 PMCID: PMC10816821 DOI: 10.3390/ijms25021027] [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: 12/11/2023] [Revised: 01/04/2024] [Accepted: 01/07/2024] [Indexed: 01/24/2024] Open
Abstract
Actinobacillus pleuropneumoniae (APP) is responsible for causing Porcine pleuropneumonia (PCP) in pigs. However, using vaccines and antibiotics to prevent and control this disease has become more difficult due to increased bacterial resistance and weak cross-immunity between different APP types. Naringin (NAR), a dihydroflavonoid found in citrus fruit peels, has been recognized as having significant therapeutic effects on inflammatory diseases of the respiratory system. In this study, we investigated the effects of NAR on the inflammatory response caused by APP through both in vivo and in vitro models. The results showed that NAR reduced the number of neutrophils (NEs) in the bronchoalveolar lavage fluid (BALF), and decreased lung injury and the expression of proteins related to the NLRP3 inflammasome after exposure to APP. In addition, NAR inhibited the nuclear translocation of nuclear factor kappa-B (NF-κB) P65 in porcine alveolar macrophage (PAMs), reduced protein expression of NLRP3 and Caspase-1, and reduced the secretion of pro-inflammatory cytokines induced by APP. Furthermore, NAR prevented the assembly of the NLRP3 inflammasome complex by reducing protein interaction between NLRP3, Caspase-1, and ASC. NAR also inhibited the potassium (K+) efflux induced by APP. Overall, these findings suggest that NAR can effectively reduce the lung inflammation caused by APP by inhibiting the over-activated NF-κB/NLRP3 signalling pathway, providing a basis for further exploration of NAR as a potential natural product for preventing and treating APP.
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Affiliation(s)
- Qilin Huang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Wei Li
- Lanzhou Center for Disease Control and Prevention, Lanzhou 730050, China;
| | - Xiaohan Jing
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Chen Liu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Saad Ahmad
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Lina Huang
- State Key Laboratory of Applied Organic Chemistry, School of Pharmacy, Lanzhou University, Lanzhou 730013, China;
| | - Guanyu Zhao
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Zhaorong Li
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Zhengying Qiu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
| | - Ruihua Xin
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Sciences (CAAS), Lanzhou 730050, China; (Q.H.); (X.J.); (C.L.); (S.A.); (G.Z.); (Z.L.)
- Engineering and Technology Research Center of Traditional Chinese Veterinary Medicine of Gansu Province, Lanzhou 730050, China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs of China, Lanzhou 730050, China
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Zhu J, Zhu R, Jiang H, Li Z, Jiang X, Li F, Zhang F, Feng X, Gu J, Li N, Lei L. Adh Promotes Actinobacillus pleuropneumoniae Survival in Porcine Alveolar Macrophages by Inhibiting CHAC2-Mediated Respiratory Burst and Inflammatory Cytokine Expression. Cells 2023; 12:cells12050696. [PMID: 36899832 PMCID: PMC10001268 DOI: 10.3390/cells12050696] [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: 12/28/2022] [Revised: 01/30/2023] [Accepted: 02/14/2023] [Indexed: 02/25/2023] Open
Abstract
Actinobacillus pleuropneumoniae (A. pleuropneumoniae) causes porcine pleuropneumonia that seriously endangers pig's health. Adh, located in the head region of trimeric autotransporter adhesion of A. pleuropneumoniae, affects bacterial adhesion and pathogenicity. However, how Adh mediates A. pleuropneumoniae immune invasion is still unclear. Here, we established the A. pleuropneumoniae strain L20 or L20 ΔAdh-infected porcine alveolar macrophages (PAM) model, and applied protein overexpression, RNA interference, qRT-PCR, Western blot and immunoflourescence techniques to dissect the effects of Adh on PAM during A. pleuropneumoniae infection. We found that Adh could increase the A. pleuropneumoniae adhesion and intracellular survival in PAM. Gene chip analysis of piglet lungs further showed that Adh significantly induced cation transport regulatory-like protein 2 (CHAC2) expression, whose overexpression suppressed the phagocytic capacity of PAM. Furthermore, CHAC2 overexpression dramatically increased glutathione (GSH) expression, decreased reactive oxygen species (ROS), and promoted A. pleuropneumoniae survival in PAM, while the knockdown of CHAC2 reversed these phenomena. Meanwhile, CHAC2 silence activated the NOD1/NF-κB pathway, resulting in an increase in IL-1β, IL-6, and TNF-α expression, whereas this effect was weakened by CHAC2 overexpression and addition of NOD1/NF-κB inhibitor ML130. Moreover, Adh enhanced the secretion of LPS of A. pleuropneumoniae, which regulated the expression of CHAC2 via TLR4. In conclusion, through a LPS-TLR4-CHAC2 pathway, Adh inhibits respiratory burst and inflammatory cytokines expression to promote A. pleuropneumoniae survival in PAM. This finding may provide a novel target for the prevention and treatment of A. pleuropneumoniae.
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Affiliation(s)
- Junhui Zhu
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Rining Zhu
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Hexiang Jiang
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Ziheng Li
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Xuan Jiang
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Fengyang Li
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Fuxian Zhang
- College of Animal Science, Yangtze University, Jingzhou 434025, China
| | - Xin Feng
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Jingmin Gu
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Na Li
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
- Correspondence: (N.L.); (L.L.)
| | - Liancheng Lei
- College of Veterinary Medicine, Jilin University, Changchun 130062, China
- College of Animal Science, Yangtze University, Jingzhou 434025, China
- Correspondence: (N.L.); (L.L.)
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5
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Application of the MISTEACHING(S) disease susceptibility framework to Actinobacillus pleuropneumoniae to identify research gaps: an exemplar of a veterinary pathogen. Anim Health Res Rev 2021; 22:120-135. [PMID: 34275511 DOI: 10.1017/s1466252321000074] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Historically, the MISTEACHING (microbiome, immunity, sex, temperature, environment, age, chance, history, inoculum, nutrition, genetics) framework to describe the outcome of host-pathogen interaction, has been applied to human pathogens. Here, we show, using Actinobacillus pleuropneumoniae as an exemplar, that the MISTEACHING framework can be applied to a strict veterinary pathogen, enabling the identification of major research gaps, the formulation of hypotheses whose study will lead to a greater understanding of pathogenic mechanisms, and/or improved prevention/therapeutic measures. We also suggest that the MISTEACHING framework should be extended with the inclusion of a 'strain' category, to become MISTEACHINGS. We conclude that the MISTEACHINGS framework can be applied to veterinary pathogens, whether they be bacteria, fungi, viruses, or parasites, and hope to stimulate others to use it to identify research gaps and to formulate hypotheses worthy of study with their own pathogens.
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6
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Plasencia-Muñoz B, Avelar-González FJ, De la Garza M, Jacques M, Moreno-Flores A, Guerrero-Barrera AL. Actinobacillus pleuropneumoniae Interaction With Swine Endothelial Cells. Front Vet Sci 2020; 7:569370. [PMID: 33195549 PMCID: PMC7658479 DOI: 10.3389/fvets.2020.569370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/28/2020] [Indexed: 12/26/2022] Open
Abstract
Actinobacillus pleuropneumonia is a swine (host) specific respiratory pathogen and the etiological agent of swine pleuropneumonia which affects pigs of all ages, many being asymptomatic carriers. This pathogen has high morbidity and mortality rates which generates large economic losses for the pig industry. Actinobacillus pleuropneumoniae is a widely studied bacterium, however its pathogenesis is not yet fully understood. The prevalence of the 18 serotypes of A. pleuropneumoniae varies by geographic region, in North American area, more specifically in Mexico, serotypes 1, 3, 5b, and 7 show higher prevalence. Actinobacillus pleuropneumoniae is described as a strict extracellular pathogen with tropism for lower respiratory tract. However, this study depicts the ability of these serotypes to adhere to non-phagocytic cells, using an endothelial cell model, as well as their ability to internalize them, proposing it could be considered as an intracellular pathogen.
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Affiliation(s)
- Berenice Plasencia-Muñoz
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Francisco J Avelar-González
- Laboratorio de Estudios Ambientales, Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Mireya De la Garza
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, Mexico
| | - Mario Jacques
- Groupe de Recherche sur les Maladies Infectieuses en Production Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada
| | - Adriana Moreno-Flores
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
| | - Alma L Guerrero-Barrera
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico
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7
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Xiao J, Liu J, Bao C, Zhu R, Gu J, Sun C, Feng X, Du C, Han W, Li Y, Lei L. Recombinant tandem epitope vaccination provides cross protection against Actinobacillus pleuropneumoniae challenge in mice. AMB Express 2020; 10:123. [PMID: 32642871 PMCID: PMC7341470 DOI: 10.1186/s13568-020-01051-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/15/2020] [Indexed: 11/10/2022] Open
Abstract
Actinobacillus pleuropneumoniae (A. pleuropneumoniae/APP) is the pathogen that causes porcine contagious pleuropneumonia. Actinobacillus pleuropneumoniae is divided into 18 serovars, and the cross protection efficacy of epitopes is debatable, which has resulted in the slow development of a vaccine. Consequently, epitope-based vaccines conferring Actinobacillus pleuropneumoniae cross protection have rarely been reported. In this study, B cell epitopes in the head domain of trimeric autotransporter adhesin were predicted, and 6 epitopes were selected. Then, the predicted epitopes (Ba1, Bb5, C1, PH1 and PH2) were connected by linkers to construct a recombinant tandem antigen (rta) gene. The RTA protein encoded by the recombinant rta gene was expressed, and finally the ICR mice were immunized with the RTA protein with or without inactivated Actinobacillus pleuropneumoniae (serovars 1 and 5b) and challenged with Actinobacillus pleuropneumoniae to evaluate the protective effect of the epitope-based vaccine and combined vaccine. The mice in the RTA-immunized group and RTA plus inactivated Actinobacillus pleuropneumoniae vaccine group had a significant improvement in clinical symptoms and a higher level of antibody in the serum than those in the control group. The RTA immune group had a 40% survival rate after Actinobacillus pleuropneumoniae infection, whereas the combination of RTA and inactivated Actinobacillus pleuropneumoniae produced very strong cross immune protection in mice, at least 50% (RTA IB1 + C5) and at most 100% (RTA IB5 + C1), whereas no cross immunoprotection was found in the solo Actinobacillus pleuropneumoniae immune group. Overall, the combination of the RTA protein and inactivated bacteria significantly enhanced the cross protection effects. This implies that RTA protein in combination with a suitable inactivated Actinobacillus pleuropneumoniae strain could be a candidate vaccine for porcine contagious pleuropneumonia.
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Wang L, Zhao X, Xia X, Zhu C, Qin W, Xu Y, Hang B, Sun Y, Chen S, Zhang H, Jiang J, Hu J, Fotina H, Zhang G. Antimicrobial Peptide JH-3 Effectively Kills Salmonella enterica Serovar Typhimurium Strain CVCC541 and Reduces Its Pathogenicity in Mice. Probiotics Antimicrob Proteins 2020; 11:1379-1390. [PMID: 31001786 DOI: 10.1007/s12602-019-09533-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Salmonella is an important zoonotic pathogen and is a major cause of gastrointestinal diseases worldwide. The current serious problem of antibiotic abuse has prompted the search for new substitutes for antibiotics. JH-3 is a small antimicrobial peptide with broad-spectrum bactericidal activity. In this study, we showed that JH-3 has good bactericidal activity towards the clinical isolate Salmonella enterica serovar Typhimurium strain CVCC541. The minimum inhibitory concentration (MIC) of JH-3 against this bacterium was determined to be 100 μg/mL, which could decrease the number of CVCC541 cells by 1000-fold in vitro within 5 h. The transmission electron microscopy (TEM) results showed that JH-3 can damage the cell wall and membrane of CVCC541, leading to the leakage of cell contents and subsequent cell death. To measure the bactericidal activity of CVCC541-infected mice were treated intraperitoneally 40 or 10 mg/kg JH-3 at 2 h or 3 days postinfection. Our results showed that treatment with 40 mg/kg JH-3 at 2 h postinfection had the best therapeutic effect and could significantly protect mice from a lethal dose of CVCC541. Furthermore, the clinical symptoms, bacterial burden in blood and organs, and intestinal pathological changes were all decreased and were close to normal. This study examined the therapeutic effect of the antimicrobial peptide JH-3 against S. enterica CVCC541 infection for the first time and determined the therapeutic effect of different JH-3 doses and treatment times, laying the foundation for studies of new antimicrobial agents.
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Affiliation(s)
- Lei Wang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China.,College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China.,Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang, People's Republic of China
| | - Xueqin Zhao
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China.,Sumy National Agrarian University, Sumy, Ukraine
| | - Xiaojing Xia
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Chunling Zhu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Wanhai Qin
- Center for Experimental and Molecular Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Yanzhao Xu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Bolin Hang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Yawei Sun
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Shijun Chen
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Huihui Zhang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Jinqing Jiang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Jianhe Hu
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China. .,College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, 453003, People's Republic of China.
| | - Hanna Fotina
- Sumy National Agrarian University, Sumy, Ukraine
| | - Gaiping Zhang
- Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang, People's Republic of China
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9
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Structural diversity of coiled coils in protein fibers of the bacterial cell envelope. Int J Med Microbiol 2019; 309:351-358. [PMID: 31182277 DOI: 10.1016/j.ijmm.2019.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/14/2019] [Accepted: 05/31/2019] [Indexed: 02/06/2023] Open
Abstract
The cell envelope of bacteria shows great diversity in architecture and composition, to a large extent due to its proteome. Proteins localized to the cell envelope, whether integrally embedded in the membrane, membrane-anchored, or peripherally associated as part of a macromolecular complex, often form elongated fibers, in which coiled coils represent a prominent structural element. These coiled-coil segments show a surprising degree of structural variability, despite being shaped by a small number of simple biophysical rules, foremost being their geometry of interaction referred to as 'knobs-into-holes'. Here we will review this diversity, particularly as it has emerged over the last decade.
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Nucleus, Cytoskeleton, and Mitogen-Activated Protein Kinase p38 Dynamics during In Vitro Maturation of Porcine Oocytes. Animals (Basel) 2019; 9:ani9040163. [PMID: 31013909 PMCID: PMC6523277 DOI: 10.3390/ani9040163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 12/23/2022] Open
Abstract
The mitogen-activated kinase (MAPK) p38, a member of the MAPK subfamily, is conserved in all mammalian cells and plays important roles in response to various physiologic cues, including mitogens and heat shock. In the present study, MAPK p38 protein expression in porcine oocytes was analyzed during in vitro maturation (IVM) by Western blotting and immunocytochemistry. The levels of p-p38 or activated p38 and p38 expression were at the lowest in the germinal vesicle (GV) stage oocyte, gradually rising at the germinal vesicle breakdown (GVBD) and then reaching a plateau throughout the IVM culture (p < 0.05). Similarly, the expression level of total p38 was also lower in the GV oocyte than in the oocyte of other meiotic stages and uprising after GVBD and remained high until the metaphase III (MII) stage (p < 0.05). In the GV stage, phosphorylated p38 (p-p38) was initially detectable in the ooplasm and subsequently became clear around the nucleus and localized in the ooplasm at GVBD (18 h post-culture). During the metaphase I (MI) and metaphase II (MII) stages, p-p38 was evenly distributed throughout the ooplasm after IVM for 30 or 42 h. We found that the subcellular localization increased in p-p38 expression throughout oocyte maturation (p < 0.05) and that dynamic reorganization of the cytoskeleton, including microfilaments and microtubules, was progressively changed during the course of meiotic maturation which was likely to be associated with the activation or networking of p38 with other proteins in supporting oocyte development. In conclusion, the alteration of p38 activation is essential for the regulation of porcine oocyte maturation, accompanied by the progressive reorganization and redistribution of the cytoskeleton and MAPK p38, respectively, in the ooplasm.
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Bao CT, Xiao JM, Liu BJ, Liu JF, Zhu RN, Jiang P, Li L, Langford PR, Lei LC. Establishment and comparison of Actinobacillus pleuropneumoniae experimental infection model in mice and piglets. Microb Pathog 2019; 128:381-389. [PMID: 30664928 DOI: 10.1016/j.micpath.2019.01.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 01/15/2019] [Accepted: 01/17/2019] [Indexed: 02/07/2023]
Abstract
Actinobacillus pleuropneumoniae (APP) causes porcine pleuropneumonia, a disease responsible for substantial losses in the worldwide pig industry. In this study, outbred Kunming (KM) and Institute of Cancer Research (ICR) mice were evaluated as alternative mice models for APP research. After intranasal infection of serotype 5 reference strain L20, there was less lung damage and a lower clinical sign score in ICR compared to KM mice. However, ICR mice showed more obvious changes in body weight loss, the amount of immune cells (such as neutrophils and lymphocytes) and cytokines (such as IL-6, IL-1β and TNF-α) in blood and bronchoalveolar lavage fluid (BALF). The immunological changes observed in ICR mice closely mimicked those found in piglets infected with L20. While both ICR and KM mice are susceptible to APP and induce pathological lesions, we suggest that ICR and KM mice are more suitable for immunological and pathogenesis studies, respectively. The research lays the theoretical basis for determine that mice could replace pigs as the APP infection model and it is of significance for the study of APP infection in the laboratory.
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Affiliation(s)
- Chun-Tong Bao
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | - Jia-Meng Xiao
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | - Bai-Jun Liu
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | - Jian-Fang Liu
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | - Ri-Ning Zhu
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | - Peng Jiang
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | - Lei Li
- College of Veterinary Medicine, Jilin University, Changchun, PR China
| | | | - Lian-Cheng Lei
- College of Veterinary Medicine, Jilin University, Changchun, PR China.
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Jiang H, Zhu R, Liu H, Bao C, Liu J, Eltahir A, Langford PR, Sun D, Liu Z, Sun C, Gu J, Han W, Feng X, Lei L. Transcriptomic analysis of porcine PBMCs in response to Actinobacillus pleuropneumoniae reveals the dynamic changes of differentially expressed genes related to immuno-inflammatory responses. Antonie van Leeuwenhoek 2018; 111:2371-2384. [DOI: 10.1007/s10482-018-1126-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 07/06/2018] [Indexed: 01/23/2023]
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Li B, Fang J, Zuo Z, Yin S, He T, Yang M, Deng J, Shen L, Ma X, Yu S, Wang Y, Ren Z, Cui H. Activation of the porcine alveolar macrophages via toll-like receptor 4/NF-κB mediated pathway provides a mechanism of resistin leading to inflammation. Cytokine 2018; 110:357-366. [PMID: 29655569 DOI: 10.1016/j.cyto.2018.04.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 03/13/2018] [Accepted: 04/04/2018] [Indexed: 12/11/2022]
Abstract
Resistin, a previously discovered cysteine-rich adipokine known to regulate glucose metabolism, has been emerged as a mediator in inflammation and immunity. Its level was supposed to be related to the expression of indicators, such as interleukin-1β (IL-1β), IL-6 and tumor necrosis factor-α (TNF-α) in inflammation. Toll-like receptor 4 (TLR4) was reported to be a receptor for resistin in cells, like leukocytes and peripheral blood mononuclear cells (PBMC). However, the pro-inflammatory role of resistin and its intracellular mechanisms in alveolar macrophages have not been thoroughly validated. Here we found that the pro-inflammatory cytokine expression in porcine alveolar macrophages (PAMs) was positively correlated with resistin. Our results also showed that resistin induced the expression of TLR4, intracellular molecules myeloid differentiation primary response protein 88 (MyD88), TRIF-related adaptor molecule (TRAM) and nuclear factor κB (NF-κB) in PAMs. In contrast, inhibition of TLR4, MyD88, TRAM and NF-κB abrogated the pro-inflammatory effect of resistin on PAMs. Additionally, the associations among TLR4, MyD88/TRAM and NF-κB were investigated by introducing TLR4-siRNA, MyD88-siRNA and TRAM-siRNA respectively into PAMs prior to the treatment with resistin. Taken together, our findings demonstrated that resistin promoted the production of pro-inflammatory cytokine in PAMs via TLR4/NF-κB-mediated pathway (TLR4/MyD88/TRAM/NF-κB).
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Affiliation(s)
- Bi Li
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Jing Fang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Zhicai Zuo
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China.
| | - Sirui Yin
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Tingting He
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Mingxian Yang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Junliang Deng
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Liuhong Shen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Xiaoping Ma
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Shumin Yu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Ya Wang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Zhihua Ren
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
| | - Hengmin Cui
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road 211, 611130, China
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Activation of Porcine Alveolar Macrophages by Actinobacillus pleuropneumoniae Lipopolysaccharide via the Toll-Like Receptor 4/NF-κB-Mediated Pathway. Infect Immun 2018; 86:IAI.00642-17. [PMID: 29229731 DOI: 10.1128/iai.00642-17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 12/01/2017] [Indexed: 12/17/2022] Open
Abstract
Actinobacillus pleuropneumoniae is the causative agent of porcine contagious pleuropneumonia. Overproduction of proinflammatory cytokines, like interleukin-1β (IL-1β), IL-6, tumor necrosis factor alpha, and resistin, in the lung is an important feature of A. pleuropneumoniae infection. These proinflammatory cytokines enhance inflammatory and immunological responses. However, the mechanism that leads to cytokine production remains unclear. As a major virulence factor of A. pleuropneumoniae, lipopolysaccharide (LPS) may act as a potent stimulator of Toll-like receptor 4 (TLR4), triggering a number of intracellular signaling pathways that lead to the synthesis of proinflammatory cytokines. Porcine alveolar macrophages (PAMs) are the first line of defense against pathogenic microbes during pathogen invasion. The results of the present study demonstrate that A. pleuropneumoniae LPS induces PAMs to produce inflammatory cytokines in time- and dose-dependent manners. Moreover, PAMs were activated by A. pleuropneumoniae LPS, resulting in upregulation of signaling molecules, including TLR4, MyD88, TRIF-related adaptor molecule, and NF-κB. In contrast, the activation effects of A. pleuropneumoniae LPS on PAMs could be suppressed by specific inhibitors, like small interfering RNA and Bay11-7082. Taken together, our data indicate that A. pleuropneumoniae LPS can induce PAMs to produce proinflammatory cytokines via the TLR4/NF-κB-mediated pathway. These findings partially reveal the mechanism of the overproduction of proinflammatory cytokines in the lungs of swine with A. pleuropneumoniae infection and may provide targets for the prevention of A. pleuropneumoniae-induced pneumonia. All the data could be used as a reference for the pathogenesis of respiratory infection.
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Jazayeri O, Daghighi SM, Rezaee F. Lifestyle alters GUT-bacteria function: Linking immune response and host. Best Pract Res Clin Gastroenterol 2017; 31:625-635. [PMID: 29566905 DOI: 10.1016/j.bpg.2017.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/03/2017] [Indexed: 02/07/2023]
Abstract
Microbiota in human is a "mixture society" of different species (i.e. bacteria, viruses, funguses) populations with a different way of relationship classification to Human. Human GUT serves as the host of the majority of different bacterial populations (GUT flora, more than 500 species), which are with us ("from the beginning") in an innate manner known as the commensal (no harm to each other) and symbiotic (mutual benefit) relationship. A homeostatic balance of host-bacteria relationship is very important and vital for a normal health process. However, this beneficial relationship and delicate homeostatic state can be disrupted by the imbalance of microbiome-composition of gut microbiota, expressing a pathogenic state. A strict homeostatic balance of microbiome-composition strongly depends on several factors; 1- lifestyle, 2- geography, 3- ethnicities, 4- "mom" as prime of the type of bacterial colonization in infant and 5- the disease. With such diversity in individuals combined with huge number of different bacterial species and their interactions, it is wise to perform an in-depth systems biology (e.g. genomics, proteomics, glycomics, and etcetera) analysis of personalized microbiome. Only in this way, we are able to generate a map of complete GUT microbiota and, in turn, to determine its interaction with host and intra-interaction with pathogenic bacteria. A specific microbiome analysis provides us the knowledge to decipher the nature of interactions between the GUT microbiota and the host and its response to the invading bacteria in a pathogenic state. The GUT-bacteria composition is independent of geography and ethnicity but lifestyle well affects GUT-bacteria composition and function. Microbiome knowledge obtained by systems biology also helps us to change the behavior of GUT microbiota in response to the pathogenic microbes as protection. Functional microbiome changes in response to environmental factors will be discussed in this review.
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Affiliation(s)
- Omid Jazayeri
- Department of Molecular and Cell Biology, Faculty of Basic Science, University of Mazandaran, Babolsar, Iran
| | - S Mojtaba Daghighi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Iran
| | - Farhad Rezaee
- Department of Gastroenterology-Hepatology, Erasmus Medical Center, Rotterdam, The Netherlands; Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
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Actinobacillus pleuropneumoniae biofilms: Role in pathogenicity and potential impact for vaccination development. Anim Health Res Rev 2017; 19:17-30. [DOI: 10.1017/s146625231700010x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AbstractActinobacillus pleuropneumoniae is a Gram-negative bacterium that belongs to the family Pasteurellaceae. It is the causative agent of porcine pleuropneumonia, a highly contagious respiratory disease that is responsible for major economic losses in the global pork industry. The disease may present itself as a chronic or an acute infection characterized by severe pathology, including hemorrhage, fibrinous and necrotic lung lesions, and, in the worst cases, rapid death. A. pleuropneumoniae is transmitted via aerosol route, direct contact with infected pigs, and by the farm environment. Many virulence factors associated with this bacterium are well characterized. However, much less is known about the role of biofilm, a sessile mode of growth that may have a critical impact on A. pleuropneumoniae pathogenicity. Here we review the current knowledge on A. pleuropneumoniae biofilm, factors associated with biofilm formation and dispersion, and the impact of biofilm on the pathogenesis A. pleuropneumoniae. We also provide an overview of current vaccination strategies against A. pleuropneumoniae and consider the possible role of biofilms vaccines for controlling the disease.
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17
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An anti-Propionibacterium acnes antibody shows heterologous resistance to an Actinobacillus pleuropneumoniae infection independent of neutrophils in mice. Immunol Res 2017; 65:1124-1129. [PMID: 28929313 DOI: 10.1007/s12026-017-8954-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Porcine contagious pleuropneumonia is a highly fatal respiratory disease that is caused by Actinobacillus pleuropneumoniae (APP) and results in tremendous economic losses for the pig breeding industry worldwide. Previous studies have demonstrated that Propionibacterium acnes (PA) could effectively prevent APP infection in mice and pigs. The humoral immune response played a primary role during this process and anti-PA antibody could mediate macrophages to kill the bacteria. However, the role of neutrophils in this process is currently unknown. In this study, mice were injected with cyclophosphamide to deplete neutrophils and then passively immunized with anti-PA serum or negative serum. Mice were subsequently challenged with APP serotype 1. The results showed that the mice exhibited less bacterial colonization, less lung damage, and a high survival rate, which were immunized with the anti-PA antibody whether neutrophils were depleted or not. Worse still, the presence of neutrophils increased the damage to the mice after challenge. These results suggest that the activity of the anti-PA antibody against APP infection was independent of neutrophils. These findings have important significance for understanding the mechanisms of humoral immunity conferred by heterologous immunization and lay a good foundation for preventing APP infection.
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Czyżewska-Dors E, Dors A, Kwit K, Stasiak E, Pomorska-Mól M. Pig Lung Immune Cytokine Response to the Swine Influenza Virus and the Actinobacillus Pleuropneumoniae Infection. J Vet Res 2017; 61:259-265. [PMID: 29978082 PMCID: PMC5894434 DOI: 10.1515/jvetres-2017-0036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 08/31/2017] [Indexed: 01/01/2023] Open
Abstract
Introduction The aim of this study was to evaluate and compare the local innate immune response to the swine influenza virus (SIV) and Actinobacillus pleuropneumoniae (App) infection in pigs. Material and Methods The study was performed on 37 seven-week-old pigs, divided into four groups: App-infected (n=11), App+SIV-infected (n=11), SIV-infected (n=11), and control (n=4). Lung samples were collected, following euthanasia, on the 2nd and 4th dpi (three piglets per inoculated group) and on the 10th dpi (remaining inoculated and control pigs). Lung concentrations of IL-1β, IL-6, IL-8, TNF-α, IL-10, IFN-α, and IFN-γ were analysed with the use of commercial porcine cytokine ELISA kits. Results Lung concentrations of IL-1β, IL-6, IL-8, TNF-α, IFN-α, and IFN-γ were induced in SIV-infected and App+SIV-infected pigs. In the lung tissue of App-infected pigs, only concentrations of IL-1β, IL-6, IL-8, and IFN-γ were elevated. Additionally, in App+SIV-infected pigs, significantly greater concentrations of IL-1β, IL-8, and IFN-α were found when compared with pigs infected with either SIV or App alone. In each tested group, the lung concentration of IL-10 remained unchanged during the entire study. Conclusion The results of the study indicate that the experimental infection of pigs with SIV or App alone and co-infection with both pathogens induced a local lung inflammatory response. However, the local cytokine response was considerably higher in co-infected pigs compared to single-infected pigs.
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Affiliation(s)
- Ewelina Czyżewska-Dors
- Department of Swine Diseases, National Veterinary Research Institute, 24-100 Pulawy, Poland
| | - Arkadiusz Dors
- Department of Swine Diseases, National Veterinary Research Institute, 24-100 Pulawy, Poland
| | - Krzysztof Kwit
- Department of Swine Diseases, National Veterinary Research Institute, 24-100 Pulawy, Poland
| | - Ewelina Stasiak
- Department of Swine Diseases, National Veterinary Research Institute, 24-100 Pulawy, Poland
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Wu W, Hu Z, Wang F, Gu H, Jiang X, Xu J, Zhan X, Zheng D, Zhang Z. Mxi1-0 regulates the growth of human umbilical vein endothelial cells through extracellular signal-regulated kinase 1/2 (ERK1/2) and interleukin-8 (IL-8)-dependent pathways. PLoS One 2017; 12:e0178831. [PMID: 28575053 PMCID: PMC5456372 DOI: 10.1371/journal.pone.0178831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 05/19/2017] [Indexed: 01/28/2023] Open
Abstract
Mxi1 plays an important role in the regulation of cell proliferation. Mxi1-0, a Mxi1 isoform, has a different N-terminal amino acid sequence, intracellular location and expression profile from Mxi1. However, the precise role of Mxi1-0 in cell proliferation and the molecular mechanism underlying its function remain poorly understood. Here, we showed that Mxi1-0 suppression decreased the proliferation of human umbilical vein endothelial cells (HUVECs) along with cell accumulation in the G2/M phase. Mxi1-0 suppression also significantly decreased the expression and secretion of interleukin (IL-8). Neutralizing IL-8 in conditioned medium (CM) from Mxi1-0-overexpressed HUVECs significantly eliminated CM-induced proliferation of HUVECs. In addition, Mxi1-0 suppression significantly decreased the activity of MAP kinase ERK1/2. Treatment of HUVECs with U0126, an ERK1/2 signaling inhibitor, attenuated autocrine production of IL-8 induced by Mxi1-0 overexpression. On the other hand, Mxi1-0 overexpression-induced IL-8 increased the level of phosphorylated ERK1/2 in HUVECs, and such increasing was diminished in cells incubated with CM, which neutralized with anti-IL-8 antibody. Taken together, our results suggest that Mxi1-0 regulates the growth of HUVECs via the IL-8 and ERK1/2 pathways, which apparently reciprocally activate each other.
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Affiliation(s)
- Weiling Wu
- Children’s Health Center, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
| | - Zhenzhen Hu
- Clinical Molecular Diagnostic Laboratory, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
| | - Feng Wang
- Children’s Health Center, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
| | - Hao Gu
- The Second Clinical School, Nanjing Medical University, Nanjing, Jiangsu, P. R.China
| | - Xiuqin Jiang
- Clinical Molecular Diagnostic Laboratory, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
| | - Jinjin Xu
- Clinical Molecular Diagnostic Laboratory, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
| | - Xi Zhan
- Center for Vascular and inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD, United States of America
| | - Datong Zheng
- Children’s Health Center, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
- Clinical Molecular Diagnostic Laboratory, The Second Hospital, Nanjing Medical University, Nanjing, Jiangsu, P. R. China
- The Second Clinical School, Nanjing Medical University, Nanjing, Jiangsu, P. R.China
- * E-mail:
| | - Zhengdong Zhang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, Jiangsu, P. R.China
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Liu J, Ma Q, Yang F, Zhu R, Gu J, Sun C, Feng X, Du C, Langford PR, Han W, Yang J, Lei L. B cell cross-epitope of Propionibacterium acnes and Actinobacillus pleuropneumonia selected by phage display library can efficiently protect from Actinobacillus pleuropneumonia infection. Vet Microbiol 2017. [PMID: 28622855 DOI: 10.1016/j.vetmic.2017.04.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Contagious porcine pleuropneumonia (CPP), caused by Actinobacillus pleuropneumoniae (APP), is a highly transmissible and fatal respiratory illness that causes tremendous economic losses for the pig breeding industry worldwide. Propionibacterium acnes (PA) has a strong cross-reaction with anti-APP1 and anti-APP5 serum and can efficiently prevent APP infection, which was fortuitously found in researching the differential gene between the different APP serotypes. There seems to be some natural cross-protection between PA and APP. To identify the common epitope, the phage display library of a PA whole genome was constructed, whose size is 105. The DNA sequence of the positive clone was determined after three rounds of biopanning, and ten common protein types were identified and the epitope was predicted by computer software. Six peptide epitopes were selected and synthesized for further analysis. Among these epitopes, Ba1, Bb5 and C1 could bind to anti-PA serum and anti-APP1 serum and vice versa. Furthermore, the IgG and IL-4 levels and CD4+/CD8+ T cell ratios in the Ba1, Bb5 and C1 groups were significantly higher than that in the control group, indicating that the epitopes could trigger an immune response, which was mainly humoral immunity. Moreover, Ba1 and Bb5 equally protected 80% of mice from a fatal dose of APP1 infection compared with the control group. Mice could resist APP1 and APP5 challenge after being treated with the combination of Ba1 and Bb5, with survival rates of 80% and 90%, respectively. These findings suggest that the PA epitope confers antigenicity and can heterologously resist to the APP infection. This finding provides a novel strategy for preventing APP infection.
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Affiliation(s)
- Jianfang Liu
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Qiuyue Ma
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Feng Yang
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Rining Zhu
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Jingmin Gu
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Changjiang Sun
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Xin Feng
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Chongtao Du
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Paul R Langford
- Section of Paediatrics, Imperial College London, St. Mary's Campus, London W2 1 PG, United Kingdom
| | - Wenyu Han
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China
| | - Junling Yang
- Department of Respiratory Medicine, The Second Hospital of Jilin University, Changchun, Jilin, 130062, People's Republic of China
| | - Liancheng Lei
- College of Veterinary Medicine, Jinlin University, Changchun, Jilin, 130062, People's Republic of China.
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Wang L, Zhao X, Zhu C, Xia X, Qin W, Li M, Wang T, Chen S, Xu Y, Hang B, Sun Y, Jiang J, Richard LP, Lei L, Zhang G, Hu J. Thymol kills bacteria, reduces biofilm formation, and protects mice against a fatal infection of Actinobacillus pleuropneumoniae strain L20. Vet Microbiol 2017; 203:202-210. [PMID: 28619145 DOI: 10.1016/j.vetmic.2017.02.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 02/23/2017] [Accepted: 02/24/2017] [Indexed: 10/20/2022]
Abstract
Actinobacillus pleuropneumoniae is the causative agent of the highly contagious and deadly respiratory infection porcine pleuropneumonia, resulting in serious losses to the pig industry worldwide. Alternative to antibiotics are urgently needed due to the serious increase in antimicrobial resistance. Thymol is a monoterpene phenol and efficiently kills a variety of bacteria. This study found that thymol has strong bactericidal effects on the A. pleuropneumoniae 5b serotype strain, an epidemic strain in China. Sterilization occurred rapidly, and the minimum inhibitory concentration (MIC) is 31.25μg/mL; the A. pleuropneumoniae density was reduced 1000 times within 10min following treatment with 1 MIC. Transmission electron microscopy (TEM) analysis revealed that thymol could rapidly disrupt the cell walls and cell membranes of A. pleuropneumoniae, causing leakage of cell contents and cell death. In addition, treatment with thymol at 0.5 MIC significantly reduced the biofilm formation of A. pleuropneumoniae. Quantitative RT-PCR results indicated that thymol treatment significantly increased the expression of the virulence genes purC, tbpB1 and clpP and down-regulated ApxI, ApxII and Apa1 expression in A. pleuropneumoniae. Therapeutic analysis of a murine model showed that thymol (20mg/kg) protected mice from a lethal dose of A. pleuropneumoniae, attenuated lung pathological lesions. This study is the first to report the use of thymol to treat A. pleuropneumoniae infection, establishing a foundation for the development of new antimicrobials.
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Affiliation(s)
- Lei Wang
- Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang 453003, China; College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China; College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, P. R.China
| | - Xueqin Zhao
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Chunling Zhu
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Xiaojing Xia
- Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang 453003, China; College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Wanhai Qin
- Center for Experimental and Molecular Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Mei Li
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Tongzhao Wang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Shijun Chen
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Yanzhao Xu
- Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang 453003, China; College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Bolin Hang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Yawei Sun
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Jinqing Jiang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | | | - Liancheng Lei
- College of Veterinary Medicine, JiLin University, Changchun, P. R. China
| | - Gaiping Zhang
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, P. R.China.
| | - Jianhe Hu
- Postdoctoral Research Base, Henan Institute of Science and Technology, Xinxiang 453003, China; College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China.
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