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Liang Q, Liu Z, Liang Z, Zhu C, Li D, Kong Q, Mou H. Development strategies and application of antimicrobial peptides as future alternatives to in-feed antibiotics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172150. [PMID: 38580107 DOI: 10.1016/j.scitotenv.2024.172150] [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: 01/12/2024] [Revised: 03/14/2024] [Accepted: 03/30/2024] [Indexed: 04/07/2024]
Abstract
The use of in-feed antibiotics has been widely restricted due to the significant environmental pollution and food safety concerns they have caused. Antimicrobial peptides (AMPs) have attracted widespread attention as potential future alternatives to in-feed antibiotics owing to their demonstrated antimicrobial activity and environment friendly characteristics. However, the challenges of weak bioactivity, immature stability, and low production yields of natural AMPs impede practical application in the feed industry. To address these problems, efforts have been made to develop strategies for approaching the AMPs with enhanced properties. Herein, we summarize approaches to improving the properties of AMPs as potential alternatives to in-feed antibiotics, mainly including optimization of structural parameters, sequence modification, selection of microbial hosts, fusion expression, and industrially fermentation control. Additionally, the potential for application of AMPs in animal husbandry is discussed. This comprehensive review lays a strong theoretical foundation for the development of in-feed AMPs to achieve the public health globally.
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Affiliation(s)
- Qingping Liang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
| | - Zhemin Liu
- Fundamental Science R&D Center of Vazyme Biotech Co. Ltd., Nanjing 210000, China
| | - Ziyu Liang
- Section of Neurobiology, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA
| | - Changliang Zhu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
| | - Dongyu Li
- College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
| | - Qing Kong
- College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
| | - Haijin Mou
- College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China.
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Chu X, Jiang D, Yu L, Li M, Wu S, Zhang F, Hu X. Heterologous Expression and Bioactivity Determination of Monochamus alternatus Antibacterial Peptide Gene in Komagataella phaffii (Pichia pastoris). Int J Mol Sci 2023; 24:ijms24065421. [PMID: 36982491 PMCID: PMC10049621 DOI: 10.3390/ijms24065421] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/21/2023] [Accepted: 03/09/2023] [Indexed: 03/18/2023] Open
Abstract
Insects have evolved to form a variety of complex natural compounds to prevent pathogen infection in the process of a long-term attack and defense game with various pathogens in nature. Antimicrobial Peptides (AMPs) are important effector molecules of the insect immune response to the pathogen invasion involved in bacteria, fungi, viruses and nematodes. The discovery and creation of new nematicides from these natural compounds is a key path to pest control. A total of 11 AMPs from Monochamus alternatus were classified into 3 categories, including Attacin, Cecropin and Defensin. Four AMP genes were successfully expressed by Komagataella phaffii KM71. The bioassay results showed that the exogenous expressed AMPs represented antimicrobial activity against Serratia (G−), Bacillus thuringiensis (G+) and Beauveria bassiana and high nematicide activity against Bursaphelenchus xylophilus. All four purified AMPs’ protein against B. xylophilus reached LC50 at 3 h (LC50 = 0.19 mg·mL−1 of MaltAtt-1, LC50 = 0.20 mg·mL−1 of MaltAtt-2 and MaltCec-2, LC50 = 0.25 mg·mL−1 of MaltDef-1). Furthermore, the AMPs could cause significant reduction of the thrashing frequency and egg hatching rate, and the deformation or fracture of the body wall of B. xylophilus. Therefore, this study is a foundation for further study of insect biological control and provides a theoretical basis for the research and development of new insecticidal pesticides.
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Affiliation(s)
- Xu Chu
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- International Joint Laboratory of Forest Symbiology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Di Jiang
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Lu Yu
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- International Joint Laboratory of Forest Symbiology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ming Li
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Songqing Wu
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Feiping Zhang
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xia Hu
- Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management in Ecological Forests, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- International Joint Laboratory of Forest Symbiology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Correspondence: ; Tel.: +86-18350068276
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Two Foreign Antimicrobial Peptides Expressed in the Chloroplast of Porphyridium purpureum Possessed Antibacterial Properties. Mar Drugs 2022; 20:md20080484. [PMID: 36005487 PMCID: PMC9409725 DOI: 10.3390/md20080484] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 07/23/2022] [Accepted: 07/25/2022] [Indexed: 12/10/2022] Open
Abstract
To solve the problem of antibiotic abuse in aquaculture and to utilize the application potential of antimicrobial peptides (AMPs), a chloroplast transformation system of Porphyridium purpureum was successfully constructed for effectively expressing two exogenous AMPs. The endogenous fragments of 16S rDNA/trnA-23S rDNA were used as flanking fragments for the homologous recombination in the chloroplast genome. Two AMPs encoded by the transformation vector were controlled by the native promoter psbB in a polycistron. The plasmids were transferred into P. purpureum via particle bombardment and the transformation vectors were screened using phosphinothricin (bar), a dominant selection marker under the control of the psbA promoter. Subsequently, in the positive transformed colonies, the exogenous fragments were found to be inserted in the flanking fragments directionally as expected and two foreign AMPs were successfully obtained. Finally, two exogenous peptides with antibacterial properties were obtained from the transformed strain. The two AMPs expressed by the transformed strain were shown to have similar inhibitory effects to antibiotics by inhibition tests. This suggested that AMPs can be introduced into aquaculture using baited microalgae, providing new ideas and ways to solve a series of aquaculture diseases caused by bacteria.
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Zhan N, Zhang L, Yang H, Zheng Y, Wei X, Wang J, Shan A. Design and heterologous expression of a novel dimeric LL37 variant in Pichia pastoris. Microb Cell Fact 2021; 20:143. [PMID: 34301247 PMCID: PMC8305873 DOI: 10.1186/s12934-021-01635-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/16/2021] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND The antimicrobial peptide LL37 is produced by white blood cells (mainly neutrophils) and various epithelial cells, and has the outstanding advantages of participating in immune regulation, causing chemotaxis of immune cells and promoting wound healing. However, the central domain of LL37 needs to be improved in terms of antimicrobial activity. RESULTS In this study, the amino acid substitution method was used to improve the antimicrobial activity of the LL37 active center, and a dimeric design with a better selection index was selected. A flexible linker was selected and combined with the 6 × His-SUMO tag and LG was successfully expressed using Pichia pastoris as a host. Recombinant LG displayed strong antimicrobial activity by destroying the cell membrane of bacteria but had low hemolytic activity. In addition, compared with monomeric peptide FR, rLG had improved ability to tolerate salt ions. CONCLUSION This research provides new ideas for the production of modified AMPs in microbial systems and their application in industrial production.
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Affiliation(s)
- Na Zhan
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China
| | - Licong Zhang
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China
| | - Hong Yang
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China
| | - Yalan Zheng
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China
| | - Xinke Wei
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China
| | - Jiajun Wang
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, China.
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