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Qu H, Zong Q, Wang H, Wu S, Cai D, Bao W. C/EBPα Epigenetically Modulates TFF1 Expression via mC-6 Methylation in the Jejunum Inflammation Induced by a Porcine Coronavirus. Front Immunol 2022; 13:881289. [PMID: 35693767 PMCID: PMC9174463 DOI: 10.3389/fimmu.2022.881289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/26/2022] [Indexed: 11/20/2022] Open
Abstract
Porcine epidemic diarrhea virus (PEDV) is an emerging coronavirus which causes acute diarrhea and destroys gastrointestinal barrier function in neonatal pigs. Trefoil factor 1 (TFF1) is a protective peptide for maintaining the integrity of gastrointestinal mucosa and reducing intestinal inflammation. However, its role in protecting intestinal epithelium against PEDV infection is still unclear. In this study, we discovered that TFF1 expression was activated in the jejunum of pigs with PEDV infection and TFF1 is required for the growth of porcine intestinal epithelial cells. For instance, inhibited cell proliferation and cell arrest were observed when TFF1 is genetically knocked-out using CRISPR-Cas9. Additionally, TFF1 depletion increased viral copy number and PEDV titer, along with the elevated genes involved in antiviral and inflammatory cytokines. The decreased TFF1 mRNA expression is in line with hypermethylation on the gene promoter. Notably, the strong interactions of protein-DNA complexes containing CCAAT motif significantly increased C/EBPα accessibility, whereas hypermethylation of mC-6 loci decreased C/EBPα binding occupancies in TFF1 promoter. Overall, our findings show that PEDV triggers the C/EBPα-mediated epigenetic regulation of TFF1 in intestine epithelium and facilitates host resistance to PEDV and other Coronavirus infections.
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Affiliation(s)
- Huan Qu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Qiufang Zong
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Haifei Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, China
| | - Shenglong Wu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, China
| | - Demin Cai
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, China
| | - Wenbin Bao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou, China
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2
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Romero-Luna HE, Hernández-Mendoza A, González-Córdova AF, Peredo-Lovillo A. Bioactive peptides produced by engineered probiotics and other food-grade bacteria: A review. Food Chem X 2022; 13:100196. [PMID: 35498967 PMCID: PMC9039921 DOI: 10.1016/j.fochx.2021.100196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/09/2021] [Accepted: 12/22/2021] [Indexed: 12/11/2022] Open
Abstract
Synthetic biology improves probiotics therapeutic approaches. Engineering technologies contribute to design probiotics mechanisms of action. Edition of proteolytic systems induce the generation of specific bioactive peptides. Engineered probiotics should be evaluated as therapeutic agents in clinical trials. Therapeutical and technological uses of engineered probiotics are still controversial.
Synthetic biology is employed for the study and design of engineered microbes with new and improved therapeutic functions. The main advantage of synthetic biology is the selective genetic manipulation of living organisms with desirable beneficial effects such as probiotics. Engineering technologies have contributed to the edition of metabolic processes involved in the mechanisms of action of probiotics, such as the generation of bioactive peptides. Hence, current information related to bioactive peptides, produced by different engineering probiotics, with antimicrobial, antiviral, antidiabetic, and antihypertensive activities, as well as their potential use as functional ingredients, is discussed here. Besides, the effectiveness and safety aspects of these bioactive peptides were also described.
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Affiliation(s)
- Haydee Eliza Romero-Luna
- Subdirección de Posgrado e Investigación, Instituto Tecnológico Superior de Xalapa, Xalapa 91096, Veracruz, Mexico
| | - Adrián Hernández-Mendoza
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD, A.C.), Hermosillo 83304, Sonora, Mexico
| | - Aarón Fernando González-Córdova
- Laboratorio de Química y Biotecnología de Productos Lácteos, Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD, A.C.), Hermosillo 83304, Sonora, Mexico
| | - Audry Peredo-Lovillo
- Subdirección de Posgrado e Investigación, Instituto Tecnológico Superior de Xalapa, Xalapa 91096, Veracruz, Mexico
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3
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Li C, Zhuang M, Zhu B, Li Y, Zhang W, Yan H, Zhang P, Li D, Yang J, Sun Y, Chen H, Cui Q, Jin P, Sun Y. Epidermal growth factor regulation by autophagy-mediated lncRNA H19 in murine intestinal tract after severe burn. J Cell Mol Med 2020; 24:5878-5887. [PMID: 32301281 PMCID: PMC7214185 DOI: 10.1111/jcmm.15262] [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: 08/01/2019] [Revised: 10/31/2019] [Accepted: 11/26/2019] [Indexed: 12/19/2022] Open
Abstract
To investigate the regulation of epidermal growth factor (EGF) by autophagy‐mediated long non‐coding RNA (lncRNA) H19 in the intestinal tracts of severely burned mice. C57BL/6J mice received third‐degree burns to 30% of the total body surface area. Rapamycin and 3‐methyladenine (3‐MA) were used to activate and inhibit autophagy, and the changes in LC3 and Beclin1 levels were assessed by Western blotting. The effect of autophagy on lncRNA H19 was detected by qRT‐PCR. Adenovirus‐mediated overexpression of lncRNA H19 in IEC‐6 cells was used to assess the effects of lncRNA H19 on EGF and let‐7g via bioinformatics analysis, Western blotting and qRT‐PCR. let‐7g mimic/inhibitor was used to overexpress/inhibit let‐7g, and qRT‐PCR and Western blotting were used to detect the effects of let‐7g on EGF. The expression levels of LC3‐II, Beclin1 and lncRNA H19 were increased in intestinal tissues and IEC‐6 cells after rapamycin treatment but were reversed after 3‐MA treatment. LC3‐II, Beclin1 and lncRNA H19 levels increased in intestinal tissues after the burn, and these increases were more significant after rapamycin treatment but decreased after 3‐MA treatment. The lncRNA H19 overexpression in IEC‐6 cells resulted in increased and decreased expression levels of EGF and let‐7g, respectively. Furthermore, overexpression and inhibition of let‐7g resulted in decreased and increased expression of EGF, respectively. Taken together, intestinal autophagy is activated after a serious burn, which can increase the transcription level of lncRNA H19. lncRNA H19 may regulate the repair of EGF via let‐7g following intestinal mucosa injury after a burn.
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Affiliation(s)
- Cuijie Li
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Mengmeng Zhuang
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Bo Zhu
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Ye Li
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Wenwen Zhang
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Hao Yan
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Pan Zhang
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Dan Li
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Juan Yang
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Yuan Sun
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Haijun Chen
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Qingwei Cui
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
| | - Peisheng Jin
- Department of Plastic Surgery, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Yong Sun
- Department of Burn Surgery, The Affiliated Huaihai Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Burn Surgery, The 71st Group Army Hospital of PLA, Xuzhou, China
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4
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Li HP, Xu CM, Wen BY, Li AQ, Zha GM, Jin XY, Zhao YZ, Feng LP, Cao YD, Yang GY, Wang YY, Zhong K. Extracellular production of recombinant sus scrofa trefoil factor 3 by Brevibacillus choshinensis. Exp Ther Med 2020; 19:2149-2154. [PMID: 32104278 PMCID: PMC7027283 DOI: 10.3892/etm.2020.8477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 12/12/2019] [Indexed: 11/06/2022] Open
Abstract
Trefoil factor 3 (TFF3) is involved in cell adhesion, motility and apoptosis, regulates mucosal immunity and maintains the functional integrity of intestinal epithelia. The upregulation of TFF3 expression in the weaning rat intestine attracted our interest. The present study hypothesized that TFF3 may serve a role in preventing diarrhea in weaning piglets, which is an important consideration in the pig farming industry. Previous recombinant TFF3 protein expression yields obtained from Escherichia coli were too low and the bioactivity of the protein was poor. Hence, this expression system was unsuitable for industrial applications. The present study explored the production of recombinant sus scrofa TFF3 in a Brevibacillus choshinensis (B. choshinensis) expression system, aiming to enhance the expression level of bioactive protein. To achieve this, the sus scrofa TFF3-encoding gene fragment was fused into an E. coli-Brevibacillus shuttle vector pNCMO2. High levels of TFF3 (30 mg/l) were produced and secreted into the B. choshinensis culture medium in soluble form with a molecular mass of 13.6 kDa and high immunoreactivity in western blotting. Thus, Brevibacillus may be used to produce useful mucosal factors for biochemical analyses and mucosal protection, and in industrial applications to produce novel inhibitors of diarrhea.
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Affiliation(s)
- He-Ping Li
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Chun-Mei Xu
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Bing-Yan Wen
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - An-Qi Li
- Kansas International College, Zhengzhou Sias University, Xinzheng, Henan 451100, P.R. China
| | - Guang-Ming Zha
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Xiang-Yang Jin
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Yun-Ze Zhao
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Lu-Ping Feng
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Ye-Dong Cao
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Guo-Yu Yang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Yue-Ying Wang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
| | - Kai Zhong
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, Henan 450002, P.R. China
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5
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Engineering of lactic acid bacteria for delivery of therapeutic proteins and peptides. Appl Microbiol Biotechnol 2019; 103:2053-2066. [DOI: 10.1007/s00253-019-09628-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 12/11/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023]
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6
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Ciaćma K, Więckiewicz J, Kędracka-Krok S, Kurtyka M, Stec M, Siedlar M, Baran J. Secretion of tumoricidal human tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) by recombinant Lactococcus lactis: optimization of in vitro synthesis conditions. Microb Cell Fact 2018; 17:177. [PMID: 30446013 PMCID: PMC6238363 DOI: 10.1186/s12934-018-1028-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 11/12/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) selectively eliminates tumor cells. However, the short biological half-life of this molecule limits its potential use in the clinic. Our aim was to construct a recombinant strain of nonpathogenic Lactococcus lactis bacteria as a vector for effective and prolonged human TRAIL production. Herein, we examined the expression and secretion conditions leading to the production of biologically active protein in vitro. RESULTS The human soluble TRAIL-cDNA (hsTRAIL-cDNA) with optimized codons was designed to fit the codon usage pattern (codon bias) of the L. lactis host. This cDNA construct was synthesized and cloned in lactococcal plasmid secretion vector pNZ8124 under the control of the nisin-induced PnisA promoter. The pNZ8124-hsTRAIL plasmid vector was transformed into the L. lactis NZ9000 host strain cells by electroporation. Secretion of the protein occurred at the neutral pH during induction, with optimized concentration of the inducer and presence of serine proteases inhibitor. Using Western blotting and amino acid sequencing method we found that TRAIL was secreted in two forms, as visualized by the presence of two distinct molecular size bands, both deprived of the usp45 protein, the bacterial signal peptide. By the use of MTS assay we were able to prove that hsTRAIL present in supernatant from L. lactis (hsTRAIL+) broth culture was cytotoxic to human HCT116 colon cancer cells but not to normal human fibroblasts. Flow cytometry analysis revealed TRAIL-induced apoptosis of cancer cells. CONCLUSIONS We designed recombinant L. lactis bacteria, which efficiently produce biologically active, anti-tumorigenic human TRAIL in vitro. Further studies in tumor-bearing NOD-SCID mice will reveal whether the TRAIL-secreting L. lactis bacteria can be used as a safe carrier of this protein, capable of inducing effective elimination of human colon cancer cells in vivo.
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Affiliation(s)
- Katarzyna Ciaćma
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Wielicka str. 265, 30-663, Kraków, Poland
| | - Jerzy Więckiewicz
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Wielicka str. 265, 30-663, Kraków, Poland
| | - Sylwia Kędracka-Krok
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Magdalena Kurtyka
- Proteomics and Mass Spectrometry Laboratory, Malopolska Centre of Biotechnology, Jagiellonian University, Kraków, Poland
| | - Małgorzata Stec
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Wielicka str. 265, 30-663, Kraków, Poland
| | - Maciej Siedlar
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Wielicka str. 265, 30-663, Kraków, Poland
| | - Jarek Baran
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Wielicka str. 265, 30-663, Kraków, Poland.
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7
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Lu Y, Yan H, Deng J, Huang Z, Jin X, Yu Y, Hu Q, Hu F, Wang J. Development and evaluation of an efficient heterologous gene knock-in reporter system in Lactococcus lactis. Microb Cell Fact 2017; 16:154. [PMID: 28923077 PMCID: PMC5604289 DOI: 10.1186/s12934-017-0770-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 09/09/2017] [Indexed: 02/07/2023] Open
Abstract
Background Lactococcus lactis is a food grade probiotics and widely used to express heterologous proteins. Generally, target genes are knocked into the L. lactis genome through double-crossover recombination to express heterologous proteins stably. However, creating marker-less heterologous genes knocked-in clones is laborious. In this study, an efficient heterologous gene knock-in reporter system was developed in L. lactis NZ9000. Results Our knock-in reporter system consists of a temperature-sensitive plasmid pJW and a recombinant L. lactis strain named NZB. The pJW contains homologous arms, and was constructed to knock-in heterologous genes at a fixed locus of NZ9000 genome. lacZ (β-galactosidase) gene was knocked into the chromosome of NZ9000 as a counter-selective marker through the plasmid pJW to generate NZB. The engineered NZB strain formed blue colonies on X-Gal plate. The desired double-crossover mutants formed white colonies distinctive from the predominantly blue colonies (parental and plasmid-integrated clones) when the embedded lacZ was replaced with the target heterologous genes carried by pJW in NZB. Conclusions By using the system, the heterologous gene knocked-in clones are screened by colony phenotype change rather than by checking colonies individually. Our new knock-in reporter system provides an efficient method to create heterologous genes knocked-in clones. Electronic supplementary material The online version of this article (doi:10.1186/s12934-017-0770-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yifei Lu
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Hongxiang Yan
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Jiezhong Deng
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Zhigang Huang
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Xurui Jin
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Yanlan Yu
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Qiwen Hu
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Fuquan Hu
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China
| | - Jing Wang
- Department of Microbiology, Third Military Medical University, Chongqing, 400038, China.
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8
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Yang N, Wang X, Teng D, Mao R, Hao Y, Feng X, Wang J. Deleting the first disulphide bond in an arenicin derivative enhances its expression in Pichia pastoris. Lett Appl Microbiol 2017; 65:241-248. [PMID: 28656630 DOI: 10.1111/lam.12770] [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] [Received: 01/23/2017] [Revised: 06/01/2017] [Accepted: 06/13/2017] [Indexed: 11/30/2022]
Abstract
The marine antimicrobial peptide NZ17074, a variant of arenicin-3 from Arenicola marina that has broad antimicrobial activity and high bioavailability, can be designed to treat bacterial and fungal diseases. To reduce the toxicity of NZ17074, N6 was designed by replacing a cysteine in positions 3 and 20 with alanine, fused to the C-terminus of the small ubiquitin-like modifier tag (SUMO), and expressed in yeast. SUMO-N6 yielded as much as 921 mg l-1 at 72 h after induction in a fermentor and increased 1·8-fold over SUMO-NZ17074. After cleavage with 30% formic acid and purification by a Sephadex G-25 column, 9·7 mg of the recombinant peptide N6 (rN6) was obtained from one-litre fermentation broth, increasing 1·4-fold over NZ17074. Compared to NZ17074, rN6 displayed almost identical antimicrobial activity with a minimal inhibitory concentration of 0·5, 0·25-0·5, 4, 0·25-16 and 16 μg ml-1 against Escherichia, Salmonella, Pseudomonas, Staphylococcus and Streptococcus strains. Our results indicate that the first disulphide bond, Cys3-Cys20, in NZ17074 is not necessary for antimicrobial activity and that its deletion might reduce toxicity to host cells. These findings may help design new antimicrobial peptides harbouring fewer disulphide bridges and may have more potent activity. SIGNIFICANCE AND IMPACT OF THE STUDY Disulphide bond formation is an important step in the protein expression and can also influence protein secretion. A deletion of the first disulphide bond in NZ17074 increased the secreted level of target protein, and its antimicrobial activity was almost unaffected by the deletion of the first disulphide bond. The first disulphide bond in NZ17074 is favourable for correctly forming another disulphide bond during expression but not necessary for its activity. This may help design and produce a novel class of antimicrobial peptides harbouring fewer disulphide bridges to save the cost.
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Affiliation(s)
- N Yang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - D Teng
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - R Mao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Y Hao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Feng
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - J Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing, China.,Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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9
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Song AAL, In LLA, Lim SHE, Rahim RA. A review on Lactococcus lactis: from food to factory. Microb Cell Fact 2017; 16:55. [PMID: 28376880 PMCID: PMC5379754 DOI: 10.1186/s12934-017-0669-x] [Citation(s) in RCA: 176] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 03/28/2017] [Indexed: 02/08/2023] Open
Abstract
Lactococcus lactis has progressed a long way since its discovery and initial use in dairy product fermentation, to its present biotechnological applications in genetic engineering for the production of various recombinant proteins and metabolites that transcends the heterologous species barrier. Key desirable features of this gram-positive lactic acid non-colonizing gut bacteria include its generally recognized as safe (GRAS) status, probiotic properties, the absence of inclusion bodies and endotoxins, surface display and extracellular secretion technology, and a diverse selection of cloning and inducible expression vectors. This have made L. lactis a desirable and promising host on par with other well established model bacterial or yeast systems such as Escherichia coli, Saccharomyces [corrected] cerevisiae and Bacillus subtilis. In this article, we review recent technological advancements, challenges, future prospects and current diversified examples on the use of L. lactis as a microbial cell factory. Additionally, we will also highlight latest medical-based applications involving whole-cell L. lactis as a live delivery vector for the administration of therapeutics against both communicable and non-communicable diseases.
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Affiliation(s)
- Adelene Ai-Lian Song
- Department of Microbiology, Faculty of Biotechnology & Biomolecular Sciences, University Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
| | - Lionel L A In
- Functional Food Research Group, Department of Biotechnology, Faculty of Applied Sciences, UCSI University, Kuala Lumpur, Malaysia
| | - Swee Hua Erin Lim
- Perdana University-Royal College of Surgeons in Ireland, Perdana University, Block B and D, MAEPS Building, MARDI Complex, Jalan MAEPS Perdana, 43400, Serdang, Selangor, Malaysia
| | - Raha Abdul Rahim
- Department of Cell & Molecular Biology, Faculty of Biotechnology & Biomolecular Sciences, University Putra Malaysia, Serdang, Selangor, Malaysia
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10
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Cytoplasmic expression of a thermostable invertase from Thermotoga maritima in Lactococcus lactis. Biotechnol Lett 2017; 39:759-765. [DOI: 10.1007/s10529-017-2295-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 01/24/2017] [Indexed: 10/20/2022]
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11
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Khoruts A, Hippen KL, Lemire AM, Holtan SG, Knights D, Young JAH. Toward revision of antimicrobial therapies in hematopoietic stem cell transplantation: target the pathogens, but protect the indigenous microbiota. Transl Res 2017; 179:116-125. [PMID: 27513211 PMCID: PMC5555748 DOI: 10.1016/j.trsl.2016.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 07/12/2016] [Accepted: 07/15/2016] [Indexed: 12/13/2022]
Abstract
Host microbiota plays important roles in providing colonization resistance to pathogens and instructing development and function of the immune system. Antibiotic treatments intended to target pathogens further weaken the host defenses and may paradoxically increase the risk of systemic infections. This consequence is especially problematic in patients undergoing hematopoietic stem cell transplantation, where the mucosal defenses are already weakened by the conditioning regimens. This review discusses the roles that indigenous microbiota plays in protecting the host and maintaining immune homeostasis. In addition, we highlight possible strategies that are being developed to allow targeted antimicrobial therapy against pathogens, while minimizing the harm to indigenous microbiota.
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Affiliation(s)
- Alexander Khoruts
- Division of Gastroenterology, Department of Medicine, Center for Immunology and Biotechnology Institute, University of Minnesota, Minneapolis, Minn.
| | - Keli L Hippen
- Division of Hematology/Oncology and Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, Minn
| | - Amanda M Lemire
- Division of Hematology/Oncology and Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, Minn
| | - Shernan G Holtan
- Blood and Marrow Transplant Program, Department of Medicine, University of Minnesota, Minneapolis, Minn
| | - Dan Knights
- Department of Computer Science and Engineering, Biotechnology Institute, University of Minnesota, Minneapolis, Minn
| | - Jo-Anne H Young
- Division of Infectious Diseases, Department of Medicine, University of Minnesota, Minneapolis, Minn
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