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Liang Y, Zhao H, Li Y, Gao F, Qiu J, Liu Z, Li Q. Joint effects about antibiotics combined using with antibiotics or phytochemicals on Aeromonas hydrophila. MARINE ENVIRONMENTAL RESEARCH 2024; 199:106594. [PMID: 38908112 DOI: 10.1016/j.marenvres.2024.106594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 05/01/2024] [Accepted: 06/04/2024] [Indexed: 06/24/2024]
Abstract
Aeromonas hydrophila is highly prevalent in aquaculture animals and aquaculture environment. Due to the abuse of antibiotics, A. hydrophila can change the antibiotic resistance spectrum directly and affect human health indirectly. The use of combined drugs replacement therapy and the long-term coexistence with drug-resistant bacteria are the reality that human beings have to face in dealing with the problem of antibiotic resistance in the future. This study showed the characteristics and trends through abundant results of combined effects related with the combinations of antibiotic and the combinations of antibiotic and phytochemical on A. hydrophila, and revealed the antagonism probability of combinations of antibiotic and phytochemical is significantly higher than that of the combinations of antibiotic. Meanwhile, the combinations of antibiotic and phytochemical could protect the host cells which also achieved the same effectiveness as combination of antibiotics, and the enrichment pathway was proved to be relatively discrete. In addition, the possible mechanism about the reverse "U" shape of the combined effect curve on wild/antibiotic-resistant bacteria was clarified, and it was confirmed that the antagonism for the combinations of antibiotic and phytochemical might has the significance in inhibiting the evolution of bacterial resistance mutations. This study was aims to provide theoretical basis and some clues for the antibiotic resistance control associated with A. hydrophila.
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Affiliation(s)
- Yannei Liang
- Key Laboratory of Agro-products Safety & Quality of Ministry of Agriculture, Beijing, PR China; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Haiqing Zhao
- Key Laboratory of Agro-products Safety & Quality of Ministry of Agriculture, Beijing, PR China; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Yun Li
- Key Laboratory of Agro-products Safety & Quality of Ministry of Agriculture, Beijing, PR China; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, PR China.
| | - Fuqing Gao
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Jing Qiu
- Key Laboratory of Agro-products Safety & Quality of Ministry of Agriculture, Beijing, PR China; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Zhe Liu
- Key Laboratory of Agro-products Safety & Quality of Ministry of Agriculture, Beijing, PR China; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Qiongyan Li
- Key Laboratory of Agro-products Safety & Quality of Ministry of Agriculture, Beijing, PR China; Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, PR China
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Liu Q, Ding J, Zhang X, Bian X, Li M, Chen J, Liu C, Chen X, Liu X, Chen Y, Zhang W, Lei M, Yuan H, Wen Y, Kong Q. Construction and characterization of Aeromonas hydrophila crp and fur deletion mutants and evaluation of its potential as live-attenuated vaccines in crucian carp. FISH & SHELLFISH IMMUNOLOGY 2024; 146:109380. [PMID: 38244821 DOI: 10.1016/j.fsi.2024.109380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/06/2024] [Accepted: 01/14/2024] [Indexed: 01/22/2024]
Abstract
Aeromonas hydrophila (A. hydrophila) is a typical zoonotic pathogenic bacterium that infects humans, animals, and fish. It has been reported that the Fur, a Fe2+ regulatory protein, and the Crp, a cAMP receptor protein, play important roles in bacterial virulence in many bacteria, but no research has been investigated on A. hydrophila. In this study, the Δfur and Δcrp mutant strains were constructed by the suicide plasmid method. These two mutant strains exhibited a slightly diminished bacterial growth and also were observed some alterations in the number of outer membrane proteins, and the disappearance of hemolysis in the Δcrp strain. Animal experiments of crucian carp showed that the Δfur and Δcrp mutant strains significantly decreased virulence compared to the wild-type strain, and both mutant strains were able to induce good immune responses by two kinds of administration routes of intraperitoneal immunization (i.p) and immersion immunization, and the protection rates through intraperitoneal injection of Δfur and Δcrp to crucian carp were as high as 83.3 % and 73.3 %, respectively, and immersion immunization route of Δfur and Δcrp to crucian carp provided protection as high as 40 % and 20 %, respectively. These two mutant strains showed abilities to induce changes in enzymatic activities of the non-specific enzymes SOD, LZM, AKP, and ACP in crucian carp. Together, these results indicated the Δfur and Δcrp mutants were safe and effective candidate vaccine strains, showing good protection against the wild-type A. hydrophila challenge.
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Affiliation(s)
- Qing Liu
- College of Veterinary Medicine, Southwest University, Chongqing, China; Yibin Academy of Southwest University, Yibin, China.
| | - Jianjun Ding
- College of Veterinary Medicine, Southwest University, Chongqing, China; Yibin Academy of Southwest University, Yibin, China
| | - Xiaofen Zhang
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Xiaoping Bian
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Mengru Li
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Jin Chen
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Chengying Liu
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Xin Chen
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Xinyu Liu
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Yaolin Chen
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Wenjin Zhang
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Meihong Lei
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Haoxiang Yuan
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Yusong Wen
- College of Veterinary Medicine, Southwest University, Chongqing, China
| | - Qingke Kong
- College of Veterinary Medicine, Southwest University, Chongqing, China.
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Wang L, Li H, Chen J, Wang Y, Gu Y, Jiu M. Antibacterial Mechanisms and Antivirulence Activities of Oridonin against Pathogenic Aeromonas hydrophila AS 1.1801. Microorganisms 2024; 12:415. [PMID: 38399819 PMCID: PMC10891661 DOI: 10.3390/microorganisms12020415] [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: 01/18/2024] [Revised: 02/08/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024] Open
Abstract
Aeromonas hydrophila, a Gram-negative bacterium widely found in freshwater environments, acts as a common conditional pathogen affecting humans, livestock, and aquatic animals. In this study, the impact of oridonin, an ent-kaurane diterpenoid compound derived from Rabdosia rubescens, on the virulence factors of A. hydrophila AS 1.1801 and its antibacterial mechanism was elucidated. The minimum inhibitory concentration (MIC) of oridonin against A. hydrophila AS 1.1801 was 100 μg/mL. Oridonin at inhibitory concentrations could significantly increase the electrical conductivity in the supernatant and escalate nucleic acid leakage (p < 0.01). This effect was concomitant with observed distortions in bacterial cells, the formation of cytoplasmic cavities, cellular damage, and pronounced inhibition of protein and nucleic acid synthesis. Additionally, oridonin at inhibitory levels exhibited a noteworthy suppressive impact on A. hydrophila AS 1.1801 across biofilm formation, motility, hemolytic activity, lipase activity, and protease activity (p < 0.05), demonstrating a dose-dependent enhancement. qRT-PCR analysis showed that the gene expression of luxR, qseB and omp were significantly downregulated after oridonin treatment in A. hydrophila AS 1.1801 (p < 0.05). Our results indicated that oridonin possessed significant antibacterial and anti-virulence effects on A. hydrophila AS 1.1801.
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Affiliation(s)
- Lunji Wang
- Key Laboratory of Microbial Resources Development and Utilization, Henan University of Science and Technology, Luoyang 471023, China; (L.W.); (J.C.)
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China; (H.L.); (Y.W.); (Y.G.)
| | - Huijuan Li
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China; (H.L.); (Y.W.); (Y.G.)
| | - Jinhao Chen
- Key Laboratory of Microbial Resources Development and Utilization, Henan University of Science and Technology, Luoyang 471023, China; (L.W.); (J.C.)
| | - Yi Wang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China; (H.L.); (Y.W.); (Y.G.)
| | - Yuqing Gu
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China; (H.L.); (Y.W.); (Y.G.)
| | - Min Jiu
- Key Laboratory of Microbial Resources Development and Utilization, Henan University of Science and Technology, Luoyang 471023, China; (L.W.); (J.C.)
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Antimicrobial and Antibiofilm Potential of Thymus vulgaris and Cymbopogon flexuosus Essential Oils against Pure and Mixed Cultures of Foodborne Bacteria. Antibiotics (Basel) 2023; 12:antibiotics12030565. [PMID: 36978432 PMCID: PMC10044171 DOI: 10.3390/antibiotics12030565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/07/2023] [Accepted: 03/10/2023] [Indexed: 03/18/2023] Open
Abstract
The spread of pathogenic and food spoilage microorganisms through the food chain still faces major mitigation challenges, despite modern advances. Although multiple cleaning and disinfection procedures are available for microbial load reduction in food-related settings, microbes can still remain on surfaces, equipment, or machinery, especially if they have the ability to form biofilms. The present study assessed the biofilm-forming properties of pure and mixed cultures of foodborne and spoilage bacteria (Listeria monocytogenes, Enterococcus faecalis, Aeromonas hydrophila, Brochothrix thermosphacta), using polystyrene and stainless steel contact surfaces. Subsequently, the antimicrobial and antibiofilm properties of Thymus vulgaris and Cymbopogon flexuosus essential oils—EOs—were evaluated against these bacteria. Moreover, in silico prediction of the absorption and toxicity values of the EOs’ major constituents was also performed, perceiving the putative application in food-related settings. Overall, biofilm formation was observed for all microbes under study, at different temperatures and both contact surfaces. In polystyrene, at 25 °C, when comparing pure with mixed cultures, the combination Listeria–Aeromonas achieved the highest biofilm biomass. Moreover, at 4 °C, increased biofilm formation was detected in stainless steel. Regarding thyme, this EO showed promising antimicrobial features (especially against A. hydrophila, with a MIC of 0.60 µg/µL) and antibiofilm abilities (MBEC of 110.79 µg/µL against L. monocytogenes, a major concern in food settings). As for lemongrass EO, the highest antimicrobial activity, with a MIC of 0.49 µg/µL, was also observed against L. monocytogenes. Overall, despite promising results, the in situ effectiveness of these essential oils, alone or in combination with other antimicrobial compounds, should be further explored.
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Liu X, Rong N, Sun W, Jian S, Chao J, Chen C, Chen R, Ding R, Chen C, Liu Y, Zhang X. The identification of polyvalent protective immunogens and immune abilities from the outer membrane proteins of Aeromonas hydrophila in fish. FISH & SHELLFISH IMMUNOLOGY 2022; 128:101-112. [PMID: 35926820 DOI: 10.1016/j.fsi.2022.07.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/13/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Among aquaculture vaccines, polyvalent vaccines (for immunoprotection against multiple bacterial species) are more efficient and can better avoid bacterial resistance and antibiotic residues in fish. Here, 15 outer membrane proteins (OMPs) of Aeromonas hydrophila were cloned and purified, and mouse antisera were prepared. Passive immunization to Carassius auratus showed that four OMPs sera (OmpW, OmpAII, P5, and AHA2685) and the entire OMPs serum held effective immunoprotection against A. hydrophila infection. Furthermore, the active immunization of four OMPs to C. auratus showed that OmpW, OmpAII, P5, and AHA2685 held effective immunoprotection against A. hydrophila, and OmpW held active cross-protection against Vibrio alginolyticus. The mechanisms of these four candidate vaccines in triggering immune responses were subsequently explored. They all could activate innate immune responses in active immunization, down-regulate (p < 0.05) the inflammation-related genes expression to reduce the inflammatory reaction induced by A. hydrophila, and down-regulate (p < 0.05) antioxidant-related factors to reduce the antioxidant reaction for bacterial infection. Noteablely, the four OMPs had protective abilities on kidney and spleen tissues of C. auratus after challenged with A. hydrophila and V. alginolyticus by histopathological observation. Collectively, our results identify OmpW as a polyvalent vaccine candidate, and OmpAII, P5, and AHA2685 as vaccine candidates against A. hydrophila infection in fish.
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Affiliation(s)
- Xiang Liu
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236041, China.
| | - Na Rong
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Wei Sun
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Sijie Jian
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Jia Chao
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Chunlin Chen
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236041, China
| | - Rui Chen
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Rui Ding
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Chen Chen
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Yong Liu
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236041, China.
| | - Xiaoying Zhang
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China; Centre of Molecular & Environmental Biology, Department of Biology, University of Minho, 4710-057, Braga, Portugal; Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada.
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6
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de Oliveira IC, Oliveira RSM, Lemos CHDP, de Oliveira CPB, Felix E Silva A, Lorenzo VP, Lima AO, da Cruz AL, Copatti CE. Essential oils from Cymbopogon citratus and Lippia sidoides in the anesthetic induction and transport of ornamental fish Pterophyllum scalare. FISH PHYSIOLOGY AND BIOCHEMISTRY 2022; 48:501-519. [PMID: 35435543 DOI: 10.1007/s10695-022-01075-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
This study verified the effects of essential oils from Lippia sidoides (EOLS) and Cymbopogon citratus (EOCC) on the anesthesia of freshwater angelfish (Pterophyllum scalare) of two different sizes (juveniles I (0.82 g) and II (2.40 g)) and the transport (8 h) of juveniles II. Fish were exposed to different concentrations of EOLS and EOCC: 0, 10, 25, 50, 75, 100, 150, 200, and 250 mg L-1. Ventilatory rate (VR) and transport for 8 h with 0, 10, and 15 mg L-1 of each essential oil were evaluated in juveniles II. The major components found in EOLS and EOCC were carvacrol (44.50%) and α-citral (73.56%), respectively. The best sedation and anesthesia times for both essential oils were obtained with 10 and 25 mg L-1 and 200 and 250 mg L-1 for juveniles I and II, respectively. Fish sedated with EOLS had lower VR values than the other treatments. Blood glucose levels were higher in ornamental fish transported with 10 and 15 mg EOLS L-1 and 15 mg EOCC L-1. Hepatic glycogen values were higher in the control group. In general, fish transported with 10 mg EOLS L-1 showed fewer gill histological alterations than other transported fish. When the type of lesion was evaluated, the highest gill alterations occurred in fish transported with EOCC. In conclusion, 10 mg EOLS L-1 could be used to transport of juveniles II because although this concentration increased blood glucose levels, it decreased the VR and muscle glycogen levels and caused only mild alterations to the gills.
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Affiliation(s)
- Iara Cruz de Oliveira
- Programa de Pós-Graduação Em Zootecnia, Universidade Federal da Bahia, Av. Adhemar de Barros, s/n, Salvador, BA, 40170-110, Brazil
| | - Rebeca Santos Matos Oliveira
- Programa de Pós-Graduação Em Zootecnia, Universidade Federal da Bahia, Av. Adhemar de Barros, s/n, Salvador, BA, 40170-110, Brazil
| | - Carlos Henrique da Paixão Lemos
- Programa de Pós-Graduação Em Zootecnia, Universidade Federal da Bahia, Av. Adhemar de Barros, s/n, Salvador, BA, 40170-110, Brazil
| | | | - Altiery Felix E Silva
- Programa de Pós-Graduação Em Zootecnia, Universidade Federal da Bahia, Av. Adhemar de Barros, s/n, Salvador, BA, 40170-110, Brazil
| | - Vitor Prates Lorenzo
- Instituto Federal Do Sertão Pernambucano, Campus Petrolina Setor Rural, Petrolina, PE, Brazil
| | - Alberto Oliveira Lima
- União Metropolitana de Educação E Cultura, Av. Luis Tarquinio Pontes, 600-Centro, Lauro de Freitas, BA, 42700-000, Brazil
| | - André Luis da Cruz
- Programa de Pós-Graduação Em Biodiversidade E Evolução, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n 40170-115, Salvador, BA, Brazil
| | - Carlos Eduardo Copatti
- Programa de Pós-Graduação Em Zootecnia, Universidade Federal da Bahia, Av. Adhemar de Barros, s/n, Salvador, BA, 40170-110, Brazil.
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Antifungal and Modulatory Activity of Lemon Balm (Lippia alba (MILL.) N. E. BROWN) Essential Oil. Sci Pharm 2022. [DOI: 10.3390/scipharm90020031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fungal diseases and the progressive development of resistance are a challenge. In this context, Lippia alba (lemon balm) is a species used in folk medicine, being described with antimicrobial potential. The aim of this study was to determine the antifungal activity and modulating effect of the essential oil of Lippia alba (Mill.) N.E. Brown leaves (LaEO). The antifungal activity of LaEO on eight Candida strains was determined by minimum inhibitory concentration (MIC) and minimum lethal concentration (MLC), minimum biofilm inhibition concentration (MBIC), minimum biofilm eradication concentration (MBEC) and time-kill. The checkerboard technique was used to determine the modulating effect of LaEO on antifungal activity. The results indicate the presence of 11 constituents, with a predominance of carvone (58.15%) and limonene (25.37%). LaEO was able to inhibit the growth of all tested microorganisms, with MIC and MLC ranging from 0.078 to 1.25 mg/mL and MBIC and MBEC ranging from 0.156 to 5 mg/mL. The time-kill assay showed that LaEO was able to eliminate the strains after two hours of exposure and the best association was observed for the combination of LaEO and ketoconazole. The results of the study indicate that LaEO has excellent antifungal activity with potential biotechnological application.
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