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Quigua-Orozco RM, Andrade IEP, Oshiro KGN, Rezende SB, Santos ADO, Pereira JAL, da Silva VG, Buccini DF, Porto WF, Macedo MLR, Cardoso MH, Franco OL. In silico optimization of analogs derived pro-adrenomedullin peptide to evaluate antimicrobial potential. Chem Biol Drug Des 2024; 104:e14588. [PMID: 39048531 DOI: 10.1111/cbdd.14588] [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: 01/30/2024] [Revised: 06/04/2024] [Accepted: 07/09/2024] [Indexed: 07/27/2024]
Abstract
Diverse computational approaches have been widely used to assist in designing antimicrobial peptides with enhanced activities. This tactic has also been used to address the need for new treatment alternatives to combat resistant bacterial infections. Herein, we have designed eight variants from a natural peptide, pro-adrenomedullin N-terminal 20 peptide (PAMP), using an in silico pattern insertion approach, the Joker algorithm. All the variants show an α-helical conformation, but with differences in the helix percentages according to circular dichroism (CD) results. We found that the C-terminal portion of PAMP may be relevant for its antimicrobial activities, as revealed by the molecular dynamics, CD, and antibacterial results. The analogs showed variable antibacterial potential, but most were not cytotoxic. Nevertheless, PAMP2 exhibited the most potent activities against human and animal-isolated bacteria, showing cytotoxicity only at a substantially higher concentration than its minimal inhibitory concentration (MIC). Our results suggest that the enhanced activity in the profile of PAMP2 may be related to their particular physicochemical properties, along with the adoption of an amphipathic α-helical arrangement with the conserved C-terminus portion. Finally, the peptides designed in this study can constitute scaffolds for the design of improved sequences.
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Affiliation(s)
- Raquel M Quigua-Orozco
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - Isadora E P Andrade
- Programa de Pós-Graduação Em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Karen G N Oshiro
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação Em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
| | - Samilla B Rezende
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - Alexandre Duarte O Santos
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - Julia A L Pereira
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - Viviane G da Silva
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - Danieli F Buccini
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
| | - William F Porto
- Programa de Pós-Graduação Em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
| | - Maria L R Macedo
- Laboratório de Purificação de Proteínas e Suas Funções Biológicas, Universidade Federal de Mato Grosso Do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Marlon H Cardoso
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
- Programa de Pós-Graduação Em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação Em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
- Laboratório de Purificação de Proteínas e Suas Funções Biológicas, Universidade Federal de Mato Grosso Do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Octávio L Franco
- S-Inova Biotech, Programa de Pós-Graduação Em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brazil
- Programa de Pós-Graduação Em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília, Distrito Federal, Brazil
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação Em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brazil
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Zhang L, Ma X, Tong P, Zheng B, Zhu M, Peng B, Wang J, Liu Y. RNA-Seq analysis of long non-coding RNA in human intestinal epithelial cells infected by Shiga toxin-producing Escherichia coli. Cytokine 2024; 173:156421. [PMID: 37944420 DOI: 10.1016/j.cyto.2023.156421] [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: 08/14/2023] [Revised: 10/28/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND The Shiga toxin-producing Escherichia coli (STEC) infects animals and induces acute intestinal inflammation. Long non-coding RNAs (lncRNAs) are known to play crucial roles in modulating inflammation response. However, it is not clear whether lncRNAs are involved in STEC-induced inflammation. METHODS AND RESULTS To understand the association of lncRNAs with STEC infection, we used RNA-seq technology to analyze the profiles of lncRNAs in Mock-infected and STEC-infected human intestinal epithelial cells (HIECs). We detected a total of 702 lncRNAs differentially expressed by STEC infection. 583 differentially expressed lncRNAs acted as competitive microRNAs (miRNAs) binding elements in regulating the gene expression involved in TNF signaling pathway, IL-17 signaling pathway, PI3K-Akt signaling pathway, and apoptosis pathways. We analyzed 3 targeted genes, TRADD, TRAF1 and TGFB2, which were differentially regulated by mRNA-miRNA-lncRNA interaction network, potentially involved in the inflammatory and apoptotic response to STEC infection. Functional analysis of up/downstream genes associated with differentially expressed lncRNAs revealed their role in adheres junction and endocytosis. We also used the qRT-PCR technique to validate 8 randomly selected differentially expressed lncRNAs and mRNAs in STEC-infected HIECs. CONCLUSION Our results, for the first time, revealed differentially expressed lncRNAs induced by STEC infection of HIECs. The results will help investigate the molecular mechanisms for the inflammatory responses induced by STEC.
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Affiliation(s)
- Liuqing Zhang
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Xuelian Ma
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Panpan Tong
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Baili Zheng
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Mingyue Zhu
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Bin Peng
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Jinquan Wang
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China
| | - Yingyu Liu
- College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, China.
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Yao L, Liu Q, Lei Z, Sun T. Development and challenges of antimicrobial peptide delivery strategies in bacterial therapy: A review. Int J Biol Macromol 2023; 253:126819. [PMID: 37709236 DOI: 10.1016/j.ijbiomac.2023.126819] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/16/2023]
Abstract
The escalating global prevalence of antimicrobial resistance poses a critical threat, prompting concerns about its impact on public health. This predicament is exacerbated by the acute shortage of novel antimicrobial agents, a scarcity attributed to the rapid surge in bacterial resistance. This review delves into the realm of antimicrobial peptides, a diverse class of compounds ubiquitously present in plants and animals across various natural organisms. Renowned for their intrinsic antibacterial activity, these peptides provide a promising avenue to tackle the intricate challenge of bacterial resistance. However, the clinical utility of peptide-based drugs is hindered by limited bioavailability and susceptibility to rapid degradation, constraining efforts to enhance the efficacy of bacterial infection treatments. The emergence of nanocarriers marks a transformative approach poised to revolutionize peptide delivery strategies. This review elucidates a promising framework involving nanocarriers within the realm of antimicrobial peptides. This paradigm enables meticulous and controlled peptide release at infection sites by detecting dynamic shifts in microenvironmental factors, including pH, ROS, GSH, and reactive enzymes. Furthermore, a glimpse into the future reveals the potential of targeted delivery mechanisms, harnessing inflammatory responses and intricate signaling pathways, including adenosine triphosphate, macrophage receptors, and pathogenic nucleic acid entities. This approach holds promise in fortifying immunity, thereby amplifying the potency of peptide-based treatments. In summary, this review spotlights peptide nanosystems as prospective solutions for combating bacterial infections. By bridging antimicrobial peptides with advanced nanomedicine, a new therapeutic era emerges, poised to confront the formidable challenge of antimicrobial resistance head-on.
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Affiliation(s)
- Longfukang Yao
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China; Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China
| | - Qianying Liu
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhixin Lei
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China; Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Taolei Sun
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China; Hubei Key Laboratory of Nanomedicine for Neurodegenerative Diseases, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
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Escherichia coli 0157:H7 virulence factors and the ruminant reservoir. Curr Opin Infect Dis 2022; 35:205-214. [PMID: 35665714 PMCID: PMC9302714 DOI: 10.1097/qco.0000000000000834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW This review updates recent findings about Escherichia coli O157:H7 virulence factors and its bovine reservoir. This Shiga toxin (Stx)-producing E. coli belongs to the Enterohemorrhagic E. coli (EHEC) pathotype causing hemorrhagic colitis. Its low infectious dose makes it an efficient, severe, foodborne pathogen. Although EHEC remains in the intestine, Stx can translocate systemically and is cytotoxic to microvascular endothelial cells, especially in the kidney and brain. Disease can progress to life-threatening hemolytic uremic syndrome (HUS) with hemolytic anemia, acute kidney failure, and thrombocytopenia. Young children, the immunocompromised, and the elderly are at the highest risk for HUS. Healthy ruminants are the major reservoir of EHEC and cattle are the primary source of human exposure. RECENT FINDINGS Advances in understanding E. coli O157:H7 pathogenesis include molecular mechanisms of virulence, bacterial adherence, type three secretion effectors, intestinal microbiome, inflammation, and reservoir maintenance. SUMMARY Many aspects of E. coli O157:H7 disease remain unclear and include the role of the human and bovine intestinal microbiomes in infection. Therapeutic strategies involve controlling inflammatory responses and/or intestinal barrier function. Finally, elimination/reduction of E. coli O157:H7 in cattle using CRISPR-engineered conjugative bacterial plasmids and/or on-farm management likely hold solutions to reduce infections and increase food safety/security.
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Loss of an Intimin-Like Protein Encoded on a Uropathogenic E. coli Pathogenicity Island Reduces Inflammation and Affects Interactions with the Urothelium. Infect Immun 2021; 90:e0027521. [PMID: 34871042 DOI: 10.1128/iai.00275-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Uropathogenic Escherichia coli (UPEC) causes the majority of uncomplicated urinary tract infections (UTI), which affect nearly half of women worldwide. Many UPEC strains encode an annotated intimin-like adhesin (ila) locus in their genome related to a well-characterized virulence factor in diarrheagenic E. coli pathotypes. Its role in UPEC uropathogenesis, however, remains unknown. In prototype UPEC strain CFT073, there is an ila locus that encodes three predicted intimin-like genes sinH, sinI, and ratA. We used in silico approaches to determine the phylogeny and genomic distribution of this locus among uropathogens. We found that the currently annotated intimin-encoding proteins in CFT073 are more closely related to invasin proteins found in Salmonella. Deletion of the individual sinH, sinI, and ratA genes did not result in measurable effects on growth, biofilm formation, or motility in vitro. On average, sinH was more highly expressed in clinical strains during active human UTI than in human urine ex vivo. Unexpectedly, we found that strains lacking this ila locus had increased adherence to bladder cells in vitro, coupled with a decrease in bladder cell invasion and death. The sinH mutant displayed a significant fitness defect in the murine model of ascending UTI including reduced inflammation in the bladder. These data confirmed an inhibitory role in bladder cell adherence to facilitate invasion and inflammation; therefore, the ila locus should be termed invasin-like, rather than intimin-like. Collectively, our data suggest that loss of this locus mediates measurable interactions with bladder cells in vitro and contributes to fitness during UTI.
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Bacillus amyloliquefaciens B10 inhibits aflatoxin B1-induced cecal inflammation in mice by regulating their intestinal flora. Food Chem Toxicol 2021; 156:112438. [PMID: 34303774 DOI: 10.1016/j.fct.2021.112438] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 07/05/2021] [Accepted: 07/20/2021] [Indexed: 01/24/2023]
Abstract
Aflatoxin B1 is a mycotoxin that widely exists in feed and has a great impact on human and animal health. This study aimed to examine whether Bacillus amyloliquefaciens B10 protected against aflatoxin B1-induced cecal inflammation in mice. It was found that Bacillus amyloliquefaciens B10 could significantly improve the effects of AFB1 on body weight and intestinal inflammation of mice and enhance the expression of tight-junction protein. Compared with the CON group, the combination of AFB1 and B10 significantly increased the abundance of Actinobacteria and Bacilli in a collaborative manner, and significantly reduced the abundance of Ruminococcae, Lactobacillaceae and Clostridia. Meanwhile, the results showed that the abundance of Bacterides and Bacterdia in AFB1 + B10 group was significantly lower than that of AFB1 group, and the Firmicutes increased significantly. Bacillus amyloliquefaciens B10 can be used as a feed additive and alleviate cecal inflammation induced by AFB1 in mice by regulating intestinal flora.
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