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Wu M, Gu C, Duan L, Yin P, Zhu T, Xu Y, Yin Q, Liu R, Ge Q, Yu H. Inoculation fermentation with Lactobacillus fermentum L28 and Staphylococcus epidermidis S24 for improving the protein degradation of air-dried goose. Food Chem 2024; 447:138955. [PMID: 38471279 DOI: 10.1016/j.foodchem.2024.138955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/28/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024]
Abstract
The inoculation fermentation technology was applied to the processing of dried cured goose to investigate the protein degradation. Lactobacillus fermentum (L), Staphylococcus epidermidis (S) and mixed strains (L + S) were individually inoculated into the whole goose before drying. We studied the degradation of protein in the air-dried period of goose. The results showed that compared with natural fermentation, inoculation fermentation significantly increased the content of non-protein nitrogen (14.85 mg/g NPN), proteolysis index (8.98% PI), myofibril fragmentation index (89.35 MFI) and total amount of free amino acids (1332.6 mg/g FAA) of dried cured goose. Electrophoresis revealed that the inoculation fermentation accelerated the degradation of macromolecular proteins and the accumulation of small molecular proteins. The degree of protein degradation in four groups of goose was in an order of L + S group > S group > L group > CK group. It suggested that inoculation fermentation could promote the degradation of myofibrillar proteins.
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Affiliation(s)
- Mangang Wu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China.
| | - Chen Gu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Likun Duan
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Peipei Yin
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Tianhao Zhu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Yuyu Xu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Qing Yin
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Rui Liu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Qingfeng Ge
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Hai Yu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China; Industrial Engineering Center for Huaiyang Cuisin of Jiangsu Province, Yangzhou University, Yangzhou 225127, China.
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2
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Wang W, Qiu Z, Li H, Wu X, Cui Y, Xie L, Chang B, Li P, Zeng H, Ding T. Patient-derived pathogenic microbe deposition enhances exposure risk in pediatric clinics. Sci Total Environ 2024; 924:171703. [PMID: 38490424 DOI: 10.1016/j.scitotenv.2024.171703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/17/2024]
Abstract
Healthcare-associated infections (HAIs) pose significant risks to pediatric patients in outpatient settings. To prevent HAIs, understanding the sources and transmission routes of pathogenic microorganisms is crucial. This study aimed to identify the sources of opportunistic bacterial pathogens (OBPs) in pediatric outpatient settings and determine their transmission routes. Furthermore, assessing the public health risks associated with the core OBPs is important. We collected 310 samples from various sites in pediatric outpatient areas and quantified the bacteria using qPCR and CFU counting. We also performed 16S rRNA gene and single-bacterial whole-genome sequencing to profile the transmission routes and antibiotic resistance characteristics of OBPs. We observed significant variations in microbial diversity and composition among sampling sites in pediatric outpatient settings, with active communication of the microbiota between linked areas. We found that the primary source of OBPs in multi-person contact areas was the hand surface, particularly in pediatric patients. Five core OBPs, Staphylococcus epidermidis, Acinetobacter baumannii, Pseudomonas aeruginosa, Streptococcus mitis, and Streptococcus oralis, were mainly derived from pediatric patients and spread into the environment. These OBPs accumulated at multi-person contact sites, resulting in high microbial diversity in these areas. Transmission tests confirmed the challenging spread of these pathogens, with S. epidermidis transferring from the patient's hand to the environment, leading to an increased abundance and emergence of related strains. More importantly, S. epidermidis isolated from pediatric patients carried more antibiotic-resistance genes. In addition, two strains of multidrug-resistant A. baumannii were isolated from both a child and a parent, confirming the transmission of the five core OBPs centered around pediatric patients and multi-person contact areas. Our results demonstrate that pediatric patients serve as a significant source of OBPs in pediatric outpatient settings. OBPs carried by pediatric patients pose a high public health risk. To effectively control HAIs, increasing hand hygiene measures in pediatric patients and enhancing the frequency of disinfection in multi-person contact areas remains crucial. By targeting these preventive measures, the spread of OBPs can be reduced, thereby mitigating the risk of HAIs in pediatric outpatient settings.
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Affiliation(s)
- Wan Wang
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Zongyao Qiu
- Center for Disease Control and Prevention of Nanhai District, Foshan 528200, China
| | - Hui Li
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Xiaorong Wu
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Ying Cui
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Lixiang Xie
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Bozhen Chang
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Peipei Li
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China
| | - Hong Zeng
- Center for Disease Control and Prevention of Nanhai District, Foshan 528200, China.
| | - Tao Ding
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China; Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou 510080, China.
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Szałapata K, Pięt M, Kasela M, Grąz M, Kapral-Piotrowska J, Mordzińska-Rak A, Samorek E, Pieniądz P, Polak J, Osińska-Jaroszuk M, Paduch R, Pawlikowska-Pawlęga B, Malm A, Jarosz-Wilkołazka A. Modified polymeric biomaterials with antimicrobial and immunomodulating properties. Sci Rep 2024; 14:8025. [PMID: 38580807 PMCID: PMC10997598 DOI: 10.1038/s41598-024-58730-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 04/02/2024] [Indexed: 04/07/2024] Open
Abstract
The modification of the surgical polypropylene mesh and the polytetrafluoroethylene vascular prosthesis with cecropin A (small peptide) and puromycin (aminonucleoside) yielded very stable preparations of modified biomaterials. The main emphasis was placed on analyses of their antimicrobial activity and potential immunomodulatory and non-cytotoxic properties towards the CCD841 CoTr model cell line. Cecropin A did not significantly affect the viability or proliferation of the CCD 841 CoTr cells, regardless of its soluble or immobilized form. In contrast, puromycin did not induce a significant decrease in the cell viability or proliferation in the immobilized form but significantly decreased cell viability and proliferation when administered in the soluble form. The covalent immobilization of these two molecules on the surface of biomaterials resulted in stable preparations that were able to inhibit the multiplication of Staphylococcus aureus and S. epidermidis strains. It was also found that the preparations induced the production of cytokines involved in antibacterial protection mechanisms and stimulated the immune response. The key regulator of this activity may be related to TLR4, a receptor recognizing bacterial LPS. In the present study, these factors were produced not only in the conditions of LPS stimulation but also in the absence of LPS, which indicates that cecropin A- and puromycin-modified biomaterials may upregulate pathways leading to humoral antibacterial immune response.
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Affiliation(s)
- Katarzyna Szałapata
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka, 19, 20-033, Lublin, Poland
| | - Mateusz Pięt
- Department of Virology and Immunology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Martyna Kasela
- Department of Pharmaceutical Microbiology, Medical University of Lublin, Chodzki 1, 20-093, Lublin, Poland
| | - Marcin Grąz
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka, 19, 20-033, Lublin, Poland
| | - Justyna Kapral-Piotrowska
- Department of Functional Anatomy and Cytobiology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Aleksandra Mordzińska-Rak
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka, 19, 20-033, Lublin, Poland
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Chodzki 1, 20-093, Lublin, Poland
| | - Elżbieta Samorek
- Department of Virology and Immunology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Pulawy, Poland
| | - Paulina Pieniądz
- Department of Virology and Immunology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Jolanta Polak
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka, 19, 20-033, Lublin, Poland
| | - Monika Osińska-Jaroszuk
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka, 19, 20-033, Lublin, Poland
| | - Roman Paduch
- Department of Virology and Immunology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Bożena Pawlikowska-Pawlęga
- Department of Functional Anatomy and Cytobiology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Anna Malm
- Department of Pharmaceutical Microbiology, Medical University of Lublin, Chodzki 1, 20-093, Lublin, Poland
| | - Anna Jarosz-Wilkołazka
- Department of Biochemistry and Biotechnology, Institute of Biological Sciences, Maria Curie-Sklodowska University, Akademicka, 19, 20-033, Lublin, Poland.
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Singha S, Koop G, Rahman MM, Ceciliani F, Addis MF, Howlader MMR, Hossain MK, Piccinini R, Locatelli C, Persson Y, Bronzo V. Pathogen group-specific risk factors for intramammary infection in water buffalo. PLoS One 2024; 19:e0299929. [PMID: 38573969 PMCID: PMC10994383 DOI: 10.1371/journal.pone.0299929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 02/16/2024] [Indexed: 04/06/2024] Open
Abstract
A cross-sectional study was conducted to estimate the prevalence of intramammary infection (IMI) associated bacteria and to identify risk factors for pathogen group-specific IMI in water buffalo in Bangladesh. A California Mastitis Test (CMT) and bacteriological cultures were performed on 1,374 quarter milk samples collected from 763 water buffalo from 244 buffalo farms in nine districts in Bangladesh. Quarter, buffalo, and farm-related data were obtained through questionnaires and visual observations. A total of 618 quarter samples were found to be culture positive. Non-aureus staphylococci were the predominant IMI-associated bacterial species, and Staphylococcus (S.) chromogenes, S. hyicus, and S. epidermidis were the most common bacteria found. The proportion of non-aureus staphylococci or Mammaliicoccus sciuri (NASM), S. aureus, and other bacterial species identified in the buffalo quarter samples varied between buffalo farms. Therefore, different management practices, buffalo breeding factors, and nutrition were considered and further analyzed when estimating the IMI odds ratio (OR). The odds of IMI by any pathogen (OR: 1.8) or by NASM (OR: 2.2) was high in buffalo herds with poor milking hygiene. Poor cleanliness of the hind quarters had a high odds of IMI caused by any pathogen (OR: 2.0) or NASM (OR: 1.9). Twice daily milking (OR: 3.1) and farms with buffalo purchased from another herd (OR: 2.0) were associated with IMI by any pathogen. Asymmetrical udders were associated with IMI-caused by any bacteria (OR: 1.7). A poor body condition score showed higher odds of IMI by any pathogen (OR: 1.4) or by NASM (OR: 1.7). This study shows that the prevalence of IMI in water buffalo was high and varied between farms. In accordance with the literature, our data highlight that IMI can be partly controlled through better farm management, primarily by improving hygiene, milking management, breeding, and nutrition.
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Affiliation(s)
- Shuvo Singha
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Lodi, Italy
- Laboratorio di Malattie Infettive degli Animali (MiLab), Università degli Studi di Milano, Lodi, Italy
- Department of Physiology, Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
- Department of Medicine and Surgery, Chattogram Veterinary and Animal Sciences University, Chattogram, Bangladesh
- Udder Health Bangladesh, Chattogram, Bangladesh
| | - Gerrit Koop
- Udder Health Bangladesh, Chattogram, Bangladesh
- Department of Population Health Sciences, Sustainable Ruminant Health, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Md. Mizanur Rahman
- Department of Medicine and Surgery, Chattogram Veterinary and Animal Sciences University, Chattogram, Bangladesh
- Udder Health Bangladesh, Chattogram, Bangladesh
| | - Fabrizio Ceciliani
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Lodi, Italy
- Udder Health Bangladesh, Chattogram, Bangladesh
| | - Maria Filippa Addis
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Lodi, Italy
- Laboratorio di Malattie Infettive degli Animali (MiLab), Università degli Studi di Milano, Lodi, Italy
| | - Md. Matiar Rahman Howlader
- Department of Physiology, Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Mohammed Kawser Hossain
- Udder Health Bangladesh, Chattogram, Bangladesh
- Department of Surgery and Theriogenology, Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Renata Piccinini
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Lodi, Italy
- Laboratorio di Malattie Infettive degli Animali (MiLab), Università degli Studi di Milano, Lodi, Italy
| | - Clara Locatelli
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Lodi, Italy
- Laboratorio di Malattie Infettive degli Animali (MiLab), Università degli Studi di Milano, Lodi, Italy
| | - Ylva Persson
- Udder Health Bangladesh, Chattogram, Bangladesh
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Swedish Veterinary Agency, Uppsala, Sweden
| | - Valerio Bronzo
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Lodi, Italy
- Laboratorio di Malattie Infettive degli Animali (MiLab), Università degli Studi di Milano, Lodi, Italy
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5
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Kou Y, Kumaran D, Howell A, Ramirez-Arcos S. Comparable bacterial growth in platelet concentrates suspended in plasma and platelet additive solution and improved detection of bacterial contamination using a new generation automated culture system. Transfusion 2024; 64:665-673. [PMID: 38456520 DOI: 10.1111/trf.17772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/09/2024] [Accepted: 02/12/2024] [Indexed: 03/09/2024]
Abstract
BACKGROUND Microbial screening of platelet concentrates (PC) with automated culture methods is widely implemented to reduce septic transfusion reactions. Herein, detection of bacterial contamination in PC was compared between units prepared in plasma and a mix of plasma and platelet additive solution (PAS) and between the BACT/ALERT 3D and next generation BACT/ALERT VIRTUO systems. STUDY DESIGN/METHODS Double apheresis units were split into single units, diluted in either PAS (PAS-PC) or plasma (plasma-PC), and tested for in vitro quality and sterility prior to spiking with ~30 CFU/unit of Staphylococcus epidermidis, Staphylococcus aureus, Serratia marcescens, and Klebsiella pneumoniae or ~10 CFU/mL of Cutibacterium acnes. Spiked PC were sampled for BACT/ALERT testing (36 and 48 h post-spiking) and colony counts (24, 36, and 48 h post-spiking). Times to detection (TtoD) and bacterial loads were compared between PC products and BACT/ALERT systems (N = 3). RESULTS Bacterial growth was similar in plasma-PC and PAS-PC. No significant differences in TtoD were observed between plasma-PC and PAS-PC at the 36-h sampling time except for S. epidermidis which grew faster in plasma-PC and C. acnes which was detected earlier in PAS-PC (p < .05). Detection of facultative bacteria was 1.3-2.2 h sooner in VIRTUO compared with 3D (p < .05) while TtoD for C. acnes was not significantly different between the two systems. DISCUSSION Comparable bacterial detection was observed in plasma-PC and PAS-PC with PC sampling performed at 36-h post blood collection. PC sampling at ≤36 h could result in faster detection of facultative pathogenic organisms with the VIRTUO system and improved PC safety.
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Affiliation(s)
- Yuntong Kou
- Product & Process Development, Canadian Blood Services, Ottawa, Ontario, Canada
| | - Dilini Kumaran
- Product & Process Development, Canadian Blood Services, Ottawa, Ontario, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
| | - Anita Howell
- Product & Process Development, Canadian Blood Services, Ottawa, Ontario, Canada
| | - Sandra Ramirez-Arcos
- Product & Process Development, Canadian Blood Services, Ottawa, Ontario, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
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Metryka O, Wasilkowski D, Dulski M, Adamczyk-Habrajska M, Augustyniak M, Mrozik A. Metallic nanoparticle actions on the outer layer structure and properties of Bacillus cereus and Staphylococcus epidermidis. Chemosphere 2024; 354:141691. [PMID: 38484999 DOI: 10.1016/j.chemosphere.2024.141691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/05/2024] [Accepted: 03/11/2024] [Indexed: 03/19/2024]
Abstract
Although the antimicrobial activity of nanoparticles (NPs) penetrating inside the cell is widely recognised, the toxicity of large NPs (>10 nm) that cannot be translocated across bacterial membranes remains unclear. Therefore, this study was performed to elucidate the direct effects of Ag-NPs, Cu-NPs, ZnO-NPs and TiO2-NPs on relative membrane potential, permeability, hydrophobicity, structural changes within chemical compounds at the molecular level and the distribution of NPs on the surfaces of the bacteria Bacillus cereus and Staphylococcus epidermidis. Overall analysis of the results indicated the different impacts of individual NPs on the measured parameters in both strains depending on their type and concentration. B. cereus proved to be more resistant to the action of NPs than S. epidermidis. Generally, Cu-NPs showed the most substantial toxic effect on both strains; however, Ag-NPs exhibited negligible toxicity. All NPs had a strong affinity for cell surfaces and showed strain-dependent characteristic dispersion. ATR-FTIR analysis explained the distinctive interactions of NPs with bacterial functional groups, leading to macromolecular structural modifications. The results presented provide new and solid evidence for the current understanding of the interactions of metallic NPs with bacterial membranes.
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Affiliation(s)
- Oliwia Metryka
- Doctoral School, University of Silesia, Bankowa 14, 40-032, Katowice, Poland.
| | - Daniel Wasilkowski
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellońska 28, 40-032, Katowice, Poland
| | - Mateusz Dulski
- Institute of Materials Science, Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pulku Piechoty 1A, 41-500, Chorzów, Poland
| | - Małgorzata Adamczyk-Habrajska
- Institute of Materials Science, Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pulku Piechoty 1A, 41-500, Chorzów, Poland
| | - Maria Augustyniak
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellońska 28, 40-032, Katowice, Poland
| | - Agnieszka Mrozik
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellońska 28, 40-032, Katowice, Poland.
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Morimura A, Taniguchi M, Takei H, Sakamoto O, Naono N, Akeda Y, Onozuka D, Yoshimura J, Tomono K, Kutsuna S, Hamaguchi S. Using novel micropore technology combined with artificial intelligence to differentiate Staphylococcus aureus and Staphylococcus epidermidis. Sci Rep 2024; 14:6994. [PMID: 38523156 PMCID: PMC10961322 DOI: 10.1038/s41598-024-55773-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 02/27/2024] [Indexed: 03/26/2024] Open
Abstract
Methods for identifying bacterial pathogens are broadly categorised into conventional culture-based microbiology, nucleic acid-based tests, and mass spectrometry. The conventional method requires several days to isolate and identify bacteria. Nucleic acid-based tests and mass spectrometry are relatively rapid and reliable, but they require trained technicians. Moreover, mass spectrometry requires expensive equipment. The development of a novel, inexpensive, and simple technique for identifying bacterial pathogens is needed. Through combining micropore technology and assembly machine learning, we developed a novel classifier whose receiver operating characteristic (ROC) curve showed an area under the ROC curve of 0.94, which rapidly differentiated between Staphylococcus aureus and Staphylococcus epidermidis in this proof-of-concept study. Morphologically similar bacteria belonging to an identical genus can be distinguished using our method, which requires no specific training, and may facilitate the diagnosis and treatment of patients with bacterial infections in remote areas and in developing countries.
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Affiliation(s)
- Ayumi Morimura
- Department of Infection Control and Prevention, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Hiroyasu Takei
- Aipore Inc., 26-1 Sakuraoka-cho, Shibuya-ku, Tokyo, 150-8512, Japan
| | - Osamu Sakamoto
- Aipore Inc., 26-1 Sakuraoka-cho, Shibuya-ku, Tokyo, 150-8512, Japan
| | - Norihiko Naono
- Aipore Inc., 26-1 Sakuraoka-cho, Shibuya-ku, Tokyo, 150-8512, Japan
| | - Yukihiro Akeda
- Department of Bacteriology I, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan
| | - Daisuke Onozuka
- Department of Oral Microbe Control, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Jumpei Yoshimura
- Department of Traumatology and Acute Critical Medicine, Graduate School of Medicine, Osaka University, 2-15 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazunori Tomono
- Osaka Institute of Public Health, 1-3-3 Nakamichi, Higashinari-ku, Osaka, 537-0025, Japan
| | - Satoshi Kutsuna
- Department of Infection Control and Prevention, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Department of Oral Microbe Control, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Division of Infection Control and Prevention, Osaka University Hospital, 2-15 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Division of Fostering Required Medical Human Resources, Center for Infectious Disease Education and Research (CiDER), Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shigeto Hamaguchi
- Division of Infection Control and Prevention, Osaka University Hospital, 2-15 Yamadaoka, Suita, Osaka, 565-0871, Japan.
- Division of Fostering Required Medical Human Resources, Center for Infectious Disease Education and Research (CiDER), Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
- Department of Transformative Analysis for Human Specimen, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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Sousa M, Oliveira IM, Correia L, Gomes IB, Sousa CA, Braga DFO, Simões M. Far-UV-C irradiation promotes synergistic bactericidal action against adhered cells of Escherichia coli and Staphylococcus epidermidis. Sci Total Environ 2024; 917:170352. [PMID: 38286293 DOI: 10.1016/j.scitotenv.2024.170352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/17/2024] [Accepted: 01/20/2024] [Indexed: 01/31/2024]
Abstract
The contamination of indoor areas is a global health problem that can cause the dispersion of infectious diseases. In that sense, it is urgent to find new strategies applying a lower concentration of the traditional chemicals used for cleaning and disinfection. Ultraviolet radiation (UV), in particular far-UV-C (200-225 nm), has emerged as a successful, powerful, easy-to-apply, and inexpensive approach for bacterial eradication that still requires scientific assessment. This study investigated new strategies for disinfection based on far-UV-C (222 nm) combined with chlorine and mechanical cleaning, providing an innovative solution using low doses. The bactericidal activity of far-UV-C (222 nm) was tested at an intensity of irradiation from 78.4 μW/cm2 to 597.7 μW/cm2 (for 1 min) against Escherichia coli and Staphylococcus epidermidis adhered on polystyrene microtiter plates. It was further tested in combination with mechanical cleaning (ultrasounds for 1 min) and free chlorine (0.1, 0.5, and 1 mg/L for 5 min). The triple combination consisting of mechanical cleaning + free chlorine (0.5 mg/L) + far-UV-C (54 mJ/cm2) was tested against cells adhered to materials found in hospital settings and other public spaces: polyvinyl chloride (PVC), stainless steel (SS), and polyetheretherketone (PEEK). Disinfection with far-UV-C (54 mJ/cm2) and free chlorine at 0.5 mg/L for 5 min allowed a total reduction of culturable E. coli cells and a logarithmic reduction of 2.98 ± 0.03 for S. epidermidis. The triple combination of far-UV-C, free chlorine, and mechanical cleaning resulted in a total reduction of culturable cells for both adhered bacteria. Bacterial adhesion to PVC, SS, and PEEK occurred at distinct extents and influenced the bactericidal activity of the triple combination, with logarithmic reductions of up to three. The overall results highlight that, based on culturability assessment, far-UV-C (54 mJ/cm2) with chlorine (0.5 mg/L; 5 min) and mechanical cleaning (1 min) as an efficient disinfection strategy using mild conditions. The combination of culturability and viability assessment of disinfection is recommended to detect regrowth events and increase the effectiveness in microbial growth control.
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Affiliation(s)
- M Sousa
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, Department of Chemical Engineering, University of Porto, 4200-465 Porto, Portugal; ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
| | - I M Oliveira
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, Department of Chemical Engineering, University of Porto, 4200-465 Porto, Portugal; ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
| | - L Correia
- SpinnerDynamics, Lda., Rua da Junta de Freguesia 194, 4540-322 Escariz, Arouca, Portugal
| | - I B Gomes
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, Department of Chemical Engineering, University of Porto, 4200-465 Porto, Portugal; ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
| | - C A Sousa
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, Department of Chemical Engineering, University of Porto, 4200-465 Porto, Portugal; ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
| | - D F O Braga
- SpinnerDynamics, Lda., Rua da Junta de Freguesia 194, 4540-322 Escariz, Arouca, Portugal
| | - M Simões
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, Department of Chemical Engineering, University of Porto, 4200-465 Porto, Portugal; ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal.
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9
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Numata T, Iwamoto K, Matsunae K, Miyake R, Suehiro M, Yanagida N, Kan T, Takahagi S, Hide M, Tanaka A. A Staphylococcus epidermidis strain inhibits the uptake of Staphylococcus aureus derived from atopic dermatitis skin into the keratinocytes. J Dermatol Sci 2024; 113:113-120. [PMID: 38395669 DOI: 10.1016/j.jdermsci.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 11/20/2023] [Accepted: 01/24/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND Various bacterial species form a microbiome in the skin. In the past, dead Staphylococcus aureus derived from atopic dermatitis (AD) are taken up by keratinocytes; however, whether live S. aureus can be taken up by keratinocytes is unknown. OBJECTIVE This study aimed to examine whether live AD strains of S. aureus internalize into the keratinocytes and how the internalization changes under conditions in which other bacterial species including S. epidermidis are present. METHODS HaCaT cells were cultured with live S. aureus and S. epidermidis (live or heat-treated) or their culture supernatants. After coculture, the change in the amount of S. aureus in the cytoplasm of HaCaT cells was analyzed using, a high-throughput imaging system, Opera Phenix™. RESULTS Live S. aureus were taken up in the cytoplasm of HaCaT cells. Coculturing live S. aureus with live S. epidermidis or the culture supernatants decreased the abundance of S. aureus in the cytoplasm. The heat-treated culture supernatants of live S. epidermidis or culture supernatants of other S. strains did not decrease the abundance of S. aureus in the cytoplasm. CONCLUSION Live S. aureus was internalized into the cytoplasm of HaCaT cells as does heat-treated S. aureus. In addition, the heat-sensitive substances secreted by coculture with S. epidermidis and keratinocytes inhibited the uptake of S. aureus by keratinocytes.
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Affiliation(s)
- Tomofumi Numata
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Kazumasa Iwamoto
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Kyouka Matsunae
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Ryu Miyake
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Masataka Suehiro
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Nozomi Yanagida
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Takanobu Kan
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Shunsuke Takahagi
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Michihiro Hide
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan
| | - Akio Tanaka
- Department of Dermatology, Graduate School of Biomedical and Health Sciences Hiroshima University, Hiroshima, Japan.
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10
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Hasan WANBW, Nezhad NG, Yaacob MA, Salleh AB, Rahman RNZRA, Leow TC. Shifting the pH profiles of Staphylococcus epidermidis lipase (SEL) and Staphylococcus hyicus lipase (SHL) through generating chimeric lipases by DNA shuffling strategy. World J Microbiol Biotechnol 2024; 40:106. [PMID: 38386107 DOI: 10.1007/s11274-024-03927-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 02/14/2024] [Indexed: 02/23/2024]
Abstract
Enzymes are often required to function in a particular reaction condition by the industrial procedure. In order to identify critical residues affecting the optimum pH of Staphylococcal lipases, chimeric lipases from homologous lipases were generated via a DNA shuffling strategy. Chimeric 1 included mutations of G166S, K212E, T243A, H271Y. Chimeric 2 consisted of substitutions of K212E, T243A, H271Y. Chimeric 3 contained substitutions of K212E, R359L. From the screening results, the pH profiles for chimeric 1 and 2 lipases were shifted from pH 7 to 6. While the pH of chimeric 3 was shifted to 8. It seems the mutation of K212E in chimeric 1 and 2 decreased the pH to 6 by changing the electrostatic potential surface. Furthermore, chimeric 3 showed 10 ˚C improvement in the optimum temperature due to the rigidification of the catalytic loop through the hydrophobic interaction network. Moreover, the substrate specificity of chimeric 1 and 2 was increased towards the longer carbon length chains due to the mutation of T243A adjacent to the lid region through increasing the flexibility of the lid. Current study illustrated that directed evolution successfully modified lipase properties including optimum pH, temperature and substrate specificity through mutations, especially near catalytic and lid regions.
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Affiliation(s)
- Wan Atiqah Najiah Binti Wan Hasan
- Enzyme and Microbial Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
| | - Nima Ghahremani Nezhad
- Enzyme and Microbial Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
| | - Mohd Adilin Yaacob
- Enzyme and Microbial Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
| | - Abu Bakar Salleh
- Enzyme and Microbial Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
| | - Raja Noor Zaliha Raja Abdul Rahman
- Enzyme and Microbial Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia
| | - Thean Chor Leow
- Enzyme and Microbial Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
- Institute of Bioscience, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
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11
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Nothias LF, Schmid R, Garlet A, Cameron H, Leoty-Okombi S, André-Frei V, Fuchs R, Dorrestein PC, Ternes P. Functional metabolomics of the human scalp: a metabolic niche for Staphylococcus epidermidis. mSystems 2024; 9:e0035623. [PMID: 38206014 PMCID: PMC10878091 DOI: 10.1128/msystems.00356-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 11/29/2023] [Indexed: 01/12/2024] Open
Abstract
Although metabolomics data acquisition and analysis technologies have become increasingly sophisticated over the past 5-10 years, deciphering a metabolite's function from a description of its structure and its abundance in a given experimental setting is still a major scientific and intellectual challenge. To point out ways to address this "data to knowledge" challenge, we developed a functional metabolomics strategy that combines state-of-the-art data analysis tools and applied it to a human scalp metabolomics data set: skin swabs from healthy volunteers with normal or oily scalp (Sebumeter score 60-120, n = 33; Sebumeter score > 120, n = 41) were analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS), yielding four metabolomics data sets for reversed phase chromatography (C18) or hydrophilic interaction chromatography (HILIC) separation in electrospray ionization (ESI) + or - ionization mode. Following our data analysis strategy, we were able to obtain increasingly comprehensive structural and functional annotations, by applying the Global Natural Product Social Networking (M. Wang, J. J. Carver, V. V. Phelan, L. M. Sanchez, et al., Nat Biotechnol 34:828-837, 2016, https://doi.org/10.1038/nbt.3597), SIRIUS (K. Dührkop, M. Fleischauer, M. Ludwig, A. A. Aksenov, et al., Nat Methods 16:299-302, 2019, https://doi.org/10.1038/s41592-019-0344-8), and MicrobeMASST (S. ZuffaS, R. Schmid, A. Bauermeister, P. W, P. Gomes, et al., bioRxiv:rs.3.rs-3189768, 2023, https://doi.org/10.21203/rs.3.rs-3189768/v1) tools. We finally combined the metabolomics data with a corresponding metagenomic sequencing data set using MMvec (J. T. Morton, A. A. Aksenov, L. F. Nothias, J. R. Foulds, et. al., Nat Methods 16:1306-1314, 2019, https://doi.org/10.1038/s41592-019-0616-3), gaining insights into the metabolic niche of one of the most prominent microbes on the human skin, Staphylococcus epidermidis.IMPORTANCESystems biology research on host-associated microbiota focuses on two fundamental questions: which microbes are present and how do they interact with each other, their host, and the broader host environment? Metagenomics provides us with a direct answer to the first part of the question: it unveils the microbial inhabitants, e.g., on our skin, and can provide insight into their functional potential. Yet, it falls short in revealing their active role. Metabolomics shows us the chemical composition of the environment in which microbes thrive and the transformation products they produce. In particular, untargeted metabolomics has the potential to observe a diverse set of metabolites and is thus an ideal complement to metagenomics. However, this potential often remains underexplored due to the low annotation rates in MS-based metabolomics and the necessity for multiple experimental chromatographic and mass spectrometric conditions. Beyond detection, prospecting metabolites' functional role in the host/microbiome metabolome requires identifying the biological processes and entities involved in their production and biotransformations. In the present study of the human scalp, we developed a strategy to achieve comprehensive structural and functional annotation of the metabolites in the human scalp environment, thus diving one step deeper into the interpretation of "omics" data. Leveraging a collection of openly accessible software tools and integrating microbiome data as a source of functional metabolite annotations, we finally identified the specific metabolic niche of Staphylococcus epidermidis, one of the key players of the human skin microbiome.
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Affiliation(s)
- Louis-Félix Nothias
- Collaborative Mass Spectrometry Innovation Center, University of California San Diego, La Jolla, California, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, USA
| | - Robin Schmid
- Collaborative Mass Spectrometry Innovation Center, University of California San Diego, La Jolla, California, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, USA
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
| | | | - Hunter Cameron
- BASF Corporation, Research Triangle Park, North Carolina, USA
| | | | | | | | - Pieter C. Dorrestein
- Collaborative Mass Spectrometry Innovation Center, University of California San Diego, La Jolla, California, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, USA
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12
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Pogány Simonová M, Chrastinová Ľ, Ščerbová J, Focková V, Plachá I, Tokarčíková K, Žitňan R, Lauková A. The effect of enterocin A/P dipeptide on growth performance, glutathione-peroxidase activity, IgA secretion and jejunal morphology in rabbits after experimental methicillin-resistant Staphylococcus epidermidis P3Tr2a Infection. Vet Res Commun 2024; 48:507-517. [PMID: 38051451 PMCID: PMC10810977 DOI: 10.1007/s11259-023-10277-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 12/02/2023] [Indexed: 12/07/2023]
Abstract
The increasing frequency of methicillin-resistant (MR) staphylococci in humans and animals need special attention for their difficult treatment and zoonotic character, therefore novel antimicrobial compounds on a natural base against antibiotic-resistant bacteria are requested. Currently, bacteriocins/enterocins present a new promising way to overcome this problem, both in prevention and treatment. Therefore, the preventive and medicinal effect of dipeptide enterocin EntA/P was evaluated against MR Staphylococcus epidermidis SEP3/Tr2a strain in a rabbit model, testing their influence on growth performance, glutathione-peroxidase (GPx) enzyme activity, phagocytic activity (PA), secretory (s)IgA, and jejunal morphometry (JM). Eighty-eight rabbits (aged 35 days, meat line M91, both sexes) were divided into experimental groups S (SEP3/Tr2a strain; 1.0 × 105 CFU/mL; dose 500µL/animal/day for 7 days, between days 14 and 21 to simulate the pathogen attack), E (EntA/P; 50 µL/animal/day, 25,600 AU/mL in two intervals, for preventive effect between days 0 and 14; for medicinal effect between days 28 and 42), E + S (EntA/P + SEP3/Tr2a; preventive effect; SEP3/Tr2a + EntA/P; medicinal effect) and control group (C; without additives). Higher body weight was recorded in all experimental groups (p < 0.001) compared to control data. The negative influence/attack of the SEP3Tra2 strain on the intestinal immunity and environment was reflected as decreased GPx activity, worse JM parameters and higher sIgA concentration in infected rabbits. These results suggest the promising preventive use of EntA/P to improve the immunity and growth of rabbits, as well as its therapeutic potential and protective role against staphylococcal infections in rabbit breeding.
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Affiliation(s)
- Monika Pogány Simonová
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, Košice, 04001, Slovakia.
| | - Ľubica Chrastinová
- Department of Animal Nutrition, National Agricultural and Food Centre, Hlohovecká 2, Nitra-Lužianky, 95141, Slovakia
| | - Jana Ščerbová
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, Košice, 04001, Slovakia
| | - Valentína Focková
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, Košice, 04001, Slovakia
| | - Iveta Plachá
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, Košice, 04001, Slovakia
| | - Katarína Tokarčíková
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, Košice, 04001, Slovakia
| | - Rudolf Žitňan
- Department of Animal Nutrition, National Agricultural and Food Centre, Hlohovecká 2, Nitra-Lužianky, 95141, Slovakia
| | - Andrea Lauková
- Centre of Biosciences of the Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, Košice, 04001, Slovakia
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Augusto de Oliveira MF, Agne DB, Bastos LSS, Andrade de Oliveira LM, Saintive S, Goudouris ES, do Prado EA, Fragoso Dos Santos H, da Silva Pereira R, Cavalcante FS, de Carvalho Ferreira D, Dos Santos KRN. Atopic dermatitis pediatric patients show high rates of nasal and intestinal colonization by methicillin-resistant Staphylococcus aureus and coagulase-negative staphylococci. BMC Microbiol 2024; 24:42. [PMID: 38287251 PMCID: PMC10823624 DOI: 10.1186/s12866-023-03165-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 12/18/2023] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND Atopic dermatitis (AD) patients have high rates of colonization by Staphylococcus aureus, which has been associated with worsening of the disease. This study characterized Staphylococcus spp isolates recovered from nares and feces of pediatric patients with AD in relation to antimicrobial susceptibility, staphylococcal cassette chromosome mec (SCCmec) type, presence of pvl genes and clonality. Besides, gut bacterial community profiles were compared with those of children without AD. RESULTS All 55 AD patients evaluated had colonization by Staphylococcus spp. Fifty-three (96.4%) patients had colonization in both clinical sites, whereas one patient each was not colonize in the nares or gut. Staphylococcus aureus was identified in the nostrils and feces of 45 (81.8%) and 39 (70.9%) patients, respectively. Methicillin-resistant Staphylococcus spp. isolates were found in 70.9% of the patients, and 24 (43.6%) had methicillin-resistant S. aureus (MRSA). S. aureus (55.6%) and S. epidermidis (26.5%) were the major species found. The prevalent lineages of S. aureus were USA800/SCCmecIV (47.6%) and USA1100/SCCmecIV (21.4%), and 61.9% of the evaluated patients had the same genotype in both sites. Additionally, gut bacterial profile of AD patients exhibits greater dissimilarity from the control group than it does among varying severities of AD. CONCLUSIONS High rates of nasal and intestinal colonization by S. aureus and methicillin-resistant staphylococci isolates were found in AD patients. Besides, gut bacterial profiles of AD patients were distinctly different from those of the control group, emphasizing the importance of monitoring S. aureus colonization and gut microbiome composition in AD patients.
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Affiliation(s)
- Mariana Fernandes Augusto de Oliveira
- Laboratório de Infecção Hospitalar, Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, CCS, Bloco I, Sala I2-010, UFRJ. Cidade Universitária, Rio de Janeiro, RJ, Brasil, CEP: 21941-590
| | - Daiane Bitencourt Agne
- Laboratório de Infecção Hospitalar, Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, CCS, Bloco I, Sala I2-010, UFRJ. Cidade Universitária, Rio de Janeiro, RJ, Brasil, CEP: 21941-590
| | - Ludmila Sento Sé Bastos
- Laboratório de Infecção Hospitalar, Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, CCS, Bloco I, Sala I2-010, UFRJ. Cidade Universitária, Rio de Janeiro, RJ, Brasil, CEP: 21941-590
| | - Laura Maria Andrade de Oliveira
- Laboratório de Cocos Patogênicos e Microbiota, Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Simone Saintive
- Serviço de Dermatologia Pediátrica, Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Ekaterini Simoes Goudouris
- Serviço de Imunologia Pediátrica, Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Evandro Alves do Prado
- Serviço de Imunologia Pediátrica, Instituto de Puericultura e Pediatria Martagão Gesteira, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | | | - Raphael da Silva Pereira
- Laboratório de Biotecnologia e Ecologia Microbiana, Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Fernanda Sampaio Cavalcante
- Departamento de Clínica Médica, Instituto de Ciências Médicas, Centro Multidisciplinar de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Brasil
| | - Dennis de Carvalho Ferreira
- Faculdade de Odontologia, Universidade Veiga de Almeida, Rio de Janeiro, Brasil
- Faculdade de Odontologia, Universidade Estácio de Sá, Rio de Janeiro, Brasil
- Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Kátia Regina Netto Dos Santos
- Laboratório de Infecção Hospitalar, Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, CCS, Bloco I, Sala I2-010, UFRJ. Cidade Universitária, Rio de Janeiro, RJ, Brasil, CEP: 21941-590.
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D’Angelo C, Trecca M, Carpentieri A, Artini M, Selan L, Tutino ML, Papa R, Parrilli E. Cold-Azurin, a New Antibiofilm Protein Produced by the Antarctic Marine Bacterium Pseudomonas sp. TAE6080. Mar Drugs 2024; 22:61. [PMID: 38393032 PMCID: PMC10890351 DOI: 10.3390/md22020061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/25/2024] Open
Abstract
Biofilm is accountable for nosocomial infections and chronic illness, making it a serious economic and public health problem. Staphylococcus epidermidis, thanks to its ability to form biofilm and colonize biomaterials, represents the most frequent causative agent involved in biofilm-associated infections of medical devices. Therefore, the research of new molecules able to interfere with S. epidermidis biofilm formation has a remarkable interest. In the present work, the attention was focused on Pseudomonas sp. TAE6080, an Antarctic marine bacterium able to produce and secrete an effective antibiofilm compound. The molecule responsible for this activity was purified by an activity-guided approach and identified by LC-MS/MS. Results indicated the active protein was a periplasmic protein similar to the Pseudomonas aeruginosa PAO1 azurin, named cold-azurin. The cold-azurin was recombinantly produced in E. coli and purified. The recombinant protein was able to impair S. epidermidis attachment to the polystyrene surface and effectively prevent biofilm formation.
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Affiliation(s)
- Caterina D’Angelo
- Department of Chemical Sciences, University of Naples “Federico II”, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (A.C.); (M.L.T.)
| | - Marika Trecca
- Department of Public Health and Infectious Diseases, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, Italy; (M.T.); (M.A.); (L.S.); (R.P.)
| | - Andrea Carpentieri
- Department of Chemical Sciences, University of Naples “Federico II”, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (A.C.); (M.L.T.)
| | - Marco Artini
- Department of Public Health and Infectious Diseases, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, Italy; (M.T.); (M.A.); (L.S.); (R.P.)
| | - Laura Selan
- Department of Public Health and Infectious Diseases, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, Italy; (M.T.); (M.A.); (L.S.); (R.P.)
| | - Maria Luisa Tutino
- Department of Chemical Sciences, University of Naples “Federico II”, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (A.C.); (M.L.T.)
| | - Rosanna Papa
- Department of Public Health and Infectious Diseases, Sapienza University, Piazzale Aldo Moro 5, 00185 Rome, Italy; (M.T.); (M.A.); (L.S.); (R.P.)
| | - Ermenegilda Parrilli
- Department of Chemical Sciences, University of Naples “Federico II”, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (A.C.); (M.L.T.)
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Sharafi T, Ghaemi EA, Rafiee M, Ardebili A. Combination antimicrobial therapy: in vitro synergistic effect of anti-staphylococcal drug oxacillin with antimicrobial peptide nisin against Staphylococcus epidermidis clinical isolates and Staphylococcus aureus biofilms. Ann Clin Microbiol Antimicrob 2024; 23:7. [PMID: 38245727 PMCID: PMC10800071 DOI: 10.1186/s12941-024-00667-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/04/2024] [Indexed: 01/22/2024] Open
Abstract
The ability of Staphylococcus epidermidis and S. aureus to form strong biofilm on plastic devices makes them the major pathogens associated with device-related infections (DRIs). Biofilm-embedded bacteria are more resistant to antibiotics, making biofilm infections very difficult to effectively treat. Here, we evaluate the in vitro activities of anti-staphylococcal drug oxacillin and antimicrobial peptide nisin, alone and in combination, against methicillin-resistant S. epidermidis (MRSE) clinical isolates and the methicillin-resistant S. aureus ATCC 43,300. The minimum inhibitory concentrations (MIC) and minimum biofilm eradication concentrations (MBEC) of oxacillin and nisin were determined using the microbroth dilution method. The anti-biofilm activities of oxacillin and nisin, alone or in combination, were evaluated. In addition, the effects of antimicrobial agents on the expression of icaA gene were examined by quantitative real-time PCR. MIC values for oxacillin and nisin ranged 4-8 µg/mL and 64-128 µg/mL, respectively. Oxacillin and nisin reduced biofilm biomass in all bacteria in a dose-dependent manner and this inhibitory effect was enhanced with combinatorial treatment. MBEC ranges for oxacillin and nisin were 2048-8192 µg/mL and 2048-4096 µg/mL, respectively. The addition of nisin significantly decreased the oxacillin MBECs from 8- to 32-fold in all bacteria. At the 1× MIC and 1/2× MIC, both oxacillin and nisin decreased significantly the expression of icaA gene in comparison with untreated control. When two antimicrobial agents were combined at 1/2× MIC concentration, the expression of icaA were significantly lower than when were used alone. Nisin/conventional oxacillin combination showed considerable anti-biofilm effects, including inhibition of biofilm formation, eradication of mature biofilm, and down-regulation of biofilm-related genes, proposing its applications for treating or preventing staphylococcal biofilm-associated infections, including device-related infections.
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Affiliation(s)
- Toktam Sharafi
- Infectious Disease Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
- Department of Microbiology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ezzat Allah Ghaemi
- Infectious Disease Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
- Department of Microbiology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Maryam Rafiee
- Infectious Disease Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
- Department of Microbiology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Abdollah Ardebili
- Infectious Disease Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran.
- Department of Microbiology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran.
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16
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Gómez-Alonso IS, Betanzos-Cabrera G, Moreno-Lafont MC, Cancino-Diaz ME, García-Pérez BE, Cancino-Diaz JC. Non-biofilm-forming Staphylococcus epidermidis planktonic cell supernatant induces alterations in osteoblast biological function. Sci Rep 2024; 14:1807. [PMID: 38245549 PMCID: PMC10799936 DOI: 10.1038/s41598-024-51899-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/10/2024] [Indexed: 01/22/2024] Open
Abstract
Staphylococcal biofilms significantly contribute to prosthetic joint infection (PJI). However, 40% of S. epidermidis PJI isolates do not produce biofilms, which does not explain the role of biofilms in these cases. We studied whether the supernatant from planktonic S. epidermidis alters osteoblast function. Non-biofilm-forming S. epidermidis supernatants (PJI- clinical isolate, healthy skin isolate (HS), and ATCC12228 reference strain) and biofilm-forming supernatants (PJI+ clinical isolate, ATCC35984 reference strain, and Staphylococcus aureus USA300 reference strain) were included. Osteoblasts stimulated with supernatants from non-biofilm-forming isolates for 3, 7, and 14 days showed significantly reduced cellular DNA content compared with unstimulated osteoblasts, and apoptosis was induced in these osteoblasts. Similar results were obtained for biofilm-forming isolates, but with a greater reduction in DNA content and higher apoptosis. Alkaline phosphatase activity and mineralization were significantly reduced in osteoblasts treated with supernatants from non-biofilm-forming isolates compared to the control at the same time points. However, the supernatants from biofilm-forming isolates had a greater effect than those from non-biofilm-forming isolates. A significant decrease in the expression of ATF4, RUNX2, ALP, SPARC, and BGLAP, and a significant increase in RANK-L expression were observed in osteoblasts treated with both supernatants. These results demonstrate that the supernatants of the S. epidermidis isolate from the PJI- and HS (commensal) with a non-biofilm-forming phenotype alter the function of osteoblasts (apoptosis induction, failure of cell differentiation, activation of osteoblasts, and induction of bone resorption), similar to biofilm-forming isolates (PJI+, ATCC35984, and S. aureus USA300), suggesting that biofilm status contributes to impaired osteoblast function and that the planktonic state can do so independently of biofilm production.
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Affiliation(s)
- Itzia Sidney Gómez-Alonso
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Manuel Carpio, Plutarco Elías Calles, Miguel Hidalgo, 11350, Mexico City, Mexico
| | - Gabriel Betanzos-Cabrera
- Área Académica de Nutrición, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Actopan Camino a Tilcuautla S/N., Pueblo San Juan Tilcuautla, 42160, Pachuca Hidalgo, Mexico
| | - Martha Cecilia Moreno-Lafont
- Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Manuel Carpio, Plutarco Elías Calles, Miguel Hidalgo, 11350, Mexico City, Mexico
| | - Mario Eugenio Cancino-Diaz
- Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Manuel Carpio, Plutarco Elías Calles, Miguel Hidalgo, 11350, Mexico City, Mexico
| | - Blanca Estela García-Pérez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Manuel Carpio, Plutarco Elías Calles, Miguel Hidalgo, 11350, Mexico City, Mexico
| | - Juan Carlos Cancino-Diaz
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Manuel Carpio, Plutarco Elías Calles, Miguel Hidalgo, 11350, Mexico City, Mexico.
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17
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Naman A, Tahseen H, Nawaz H, Majeed MI, Ali A, Haque A, Akbar MU, Mehmood N, Nosheen R, Nadeem S, Shahzadi A, Imran M. Surface-enhanced Raman spectroscopy for characterization of supernatant samples of biofilm forming bacterial strains. Spectrochim Acta A Mol Biomol Spectrosc 2024; 305:123414. [PMID: 37852119 DOI: 10.1016/j.saa.2023.123414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/07/2023] [Accepted: 09/13/2023] [Indexed: 10/20/2023]
Abstract
Staphylococcus epidermidis is considered major cause of nosocomial infections. Its pathogenicity is mainly due to the ability to form biofilms on different surfaces, particularly indwelling medical devices. This bacterium consists of different strains consisting of non, medium and strong biofilm forming ones. Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical technique that can be used to detect and analyze biochemical composition of the supernatant samples of different strains of bacteria including non, medium and strong biofilm forming bacterial strains. SERS is a powerful technique for the robust, reliable, rapid detection and discrimination of bacteria in the form of characteristic SERS spectral features which can be used for detection and classification. SERS is used to differentiate three classes of bacteria with respect to their biofilm forming ability. Silver nanoparticles (Ag NPs) are used as SERS substrate and synthesized with chemical reduction method. Principal component analysis (PCA) and partial least square discriminant analysis (PLS-DA) are used to discriminate SERS spectral data sets of non, medium and strong biofilm forming bacteria. PLS-DA analysis is a multivariate statistical technique that can be used to analyze data from bacterial sets.
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Affiliation(s)
- Abdul Naman
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Hira Tahseen
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Haq Nawaz
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan.
| | - Muhammad Irfan Majeed
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan.
| | - Aamir Ali
- National Institute for Biotechnology and Genetic Engineering College, Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Jhang Road, Faisalabad 38000, Pakistan
| | - Asma Haque
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Faisalabad 38000, Pakistan
| | - Muhammad Umair Akbar
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad (GCUF), Faisalabad 38000, Pakistan
| | - Nasir Mehmood
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Rashid Nosheen
- Department of Chemistry, University of Education, Faisalabad Campus, Faisalabad 38000, Pakistan.
| | - Sana Nadeem
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Aqsa Shahzadi
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Imran
- Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
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18
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Ohkubo T, Matsumoto Y, Sasaki H, Kinoshita K, Ogasawara Y, Sugita T. Citrobacter koseri inhibits the growth of Staphylococcus epidermidis by suppressing iron utilization. Biochem Biophys Res Commun 2024; 691:149277. [PMID: 38029543 DOI: 10.1016/j.bbrc.2023.149277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 11/15/2023] [Indexed: 12/01/2023]
Abstract
The human skin microbiome consists of many species of bacteria, including Staphylococcus aureus and S. epidermidis. Individuals with atopic dermatitis (AD) have an increased relative abundance of S. aureus, which exacerbates the inflammation of AD. Although S. epidermidis, a main component of healthy skin microbiota, inhibits the growth of S. aureus, the balance between S. epidermidis and S. aureus is disrupted in the skin of individuals with AD. In this study, we found that Citrobacter koseri isolated from patients with AD produces substances that inhibit the growth of S. epidermidis. Heat-treated culture supernatant (CS) of C. koseri inhibited the growth of S. epidermidis but not S. aureus. The genome of C. koseri has gene clusters related to siderophores and the heat-treated CS of C. koseri contained a high concentration of siderophores compared with the control medium. The inhibitory activity of C. koseri CS against the growth of S. epidermidis was decreased by the addition of iron, but not copper or zinc. Deferoxamine, an iron-chelating agent, also inhibited the growth of S. epidermidis, but not that of S. aureus. These findings suggest that C. koseri inhibits the growth of S. epidermidis by interfering with its iron utilization.
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Affiliation(s)
- Tomotaka Ohkubo
- Department of Microbiology, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo, 204-8588, Japan; Department of Analytical Biochemistry, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo, 204-8588, Japan
| | - Yasuhiko Matsumoto
- Department of Microbiology, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo, 204-8588, Japan.
| | - Hiroaki Sasaki
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo, 204-8588, Japan
| | - Kaoru Kinoshita
- Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo, 204-8588, Japan
| | - Yuki Ogasawara
- Department of Analytical Biochemistry, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo, 204-8588, Japan
| | - Takashi Sugita
- Department of Microbiology, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo, 204-8588, Japan
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19
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Golosova NN, Khlusevich YA, Morozova VV, Matveev AL, Kozlova YN, Tikunov AY, Panina EA, Tikunova NV. Characterization of a Thermostable Endolysin of the Aeribacillus Phage AeriP45 as a Potential Staphylococcus Biofilm-Removing Agent. Viruses 2024; 16:93. [PMID: 38257793 PMCID: PMC10819204 DOI: 10.3390/v16010093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/06/2024] [Accepted: 01/06/2024] [Indexed: 01/24/2024] Open
Abstract
Multidrug-resistant Gram-positive bacteria, including bacteria from the genus Staphylococcus, are currently a challenge for medicine. Therefore, the development of new antimicrobials is required. Promising candidates for new antistaphylococcal drugs are phage endolysins, including endolysins from thermophilic phages against other Gram-positive bacteria. In this study, the recombinant endolysin LysAP45 from the thermophilic Aeribacillus phage AP45 was obtained and characterized. The recombinant endolysin LysAP45 was produced in Escherichia coli M15 cells. It was shown that LysAP45 is able to hydrolyze staphylococcal peptidoglycans from five species and eleven strains. Thermostability tests showed that LysAP45 retained its hydrolytic activity after incubation at 80 °C for at least 30 min. The enzymatically active domain of the recombinant endolysin LysAP45 completely disrupted biofilms formed by multidrug-resistant S. aureus, S. haemolyticus, and S. epidermidis. The results suggested that LysAP45 is a novel thermostable antimicrobial agent capable of destroying biofilms formed by various species of multidrug-resistant Staphylococcus. An unusual putative cell-binding domain was found at the C-terminus of LysAP45. No domains with similar sequences were found among the described endolysins.
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Affiliation(s)
| | | | | | | | | | | | | | - Nina V. Tikunova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (N.N.G.); (V.V.M.); (A.L.M.); (Y.N.K.); (A.Y.T.); (E.A.P.)
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20
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Udduttula A, Jakubovics N, Khan I, Pontiroli L, Rankin KS, Gentile P, Ferreira AM. Layer-by-Layer Coatings of Collagen-Hyaluronic acid Loaded with an Antibacterial Manuka Honey Bioactive Compound to Fight Metallic Implant Infections. ACS Appl Mater Interfaces 2023; 15:58119-58135. [PMID: 38055248 PMCID: PMC10739588 DOI: 10.1021/acsami.3c11910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 12/07/2023]
Abstract
Implant-associated severe infections can result in catastrophic implant failures; thus, advanced antibacterial coatings are needed to combat infections. This study focuses on harnessing nature-inspired self-assembly of extracellular matrix (ECM)-like coatings on Ti alloy with a combination of jellyfish-derived collagen (J-COLL) and hyaluronic acid (HA) using our customized automated hybrid layer-by-layer apparatus. To improve the anti-infection efficacy of coatings, we have incorporated a natural antibacterial agent methylglyoxal (MGO, a Manuka honey compound) in optimized multilayer coatings. The obtainment of MGO-loaded multilayer coatings was successfully assessed by profilometry, contact angle, attenuated total reflectance (ATR)-Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. In vitro degradation confirmed the controlled release activity of MGO with a range of concentrations from 0.90 to 2.38 mM up to 21 days. A bacterial cell culture study using Escherichia coli (E. coli) and Staphylococcus epidermidis (S. epidermidis) confirmed that the MGO incorporated within layers 7 and 9 had a favorable effect on preventing bacterial growth and colonization on their surfaces. An in vitro cytocompatibility study confirmed that MGO agents included in the layers did not affect or reduce the cellular functionalities of L929 fibroblasts. In addition, MGO-loaded layers with Immortalized Mesenchymal Stem Cells (Y201 TERT-hMSCs) were found to favor the growth and differentiation of Y201 cells and promote calcium nodule formation. Overall, these surface coatings are promising candidates for delivering antimicrobial activity with bone-inducing functions for future bone tissue engineering applications.
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Affiliation(s)
- Anjaneyulu Udduttula
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
- Centre
of Biomaterials, Cellular & Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore, TN 632014, India
| | - Nicholas Jakubovics
- School
of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle
Upon Tyne NE1 7RU, U.K.
| | - Imran Khan
- Biomet
UK Healthcare Ltd, Stella Building, Windmill Hill Business Park, Swindon SN5 6NX, U.K.
| | - Lucia Pontiroli
- Biomet
UK Healthcare Ltd, Stella Building, Windmill Hill Business Park, Swindon SN5 6NX, U.K.
| | - Kenneth S. Rankin
- Translational
and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, U.K.
| | - Piergiorgio Gentile
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
| | - Ana M. Ferreira
- School
of Engineering, Newcastle University, Newcastle Upon Tyne NE1
7RU, U.K.
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21
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Klubthawee N, Wongchai M, Aunpad R. The bactericidal and antibiofilm effects of a lysine-substituted hybrid peptide, CM-10K14K, on biofilm-forming Staphylococcus epidermidis. Sci Rep 2023; 13:22262. [PMID: 38097636 PMCID: PMC10721899 DOI: 10.1038/s41598-023-49302-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023] Open
Abstract
Staphylococci, notably biofilm-forming Staphylococcus epidermidis, have been recognized as global nosocomial pathogens in medical device-related infections. Their potential to attach to and form biofilm on indwelling catheters are significant factors impeding conventional treatment. Due to their extensive antimicrobial and antibiofilm actions, antimicrobial peptides (AMPs) have attracted interest as promising alternative compounds for curing difficult-to-treat, biofilm-forming bacterial infections. Cecropin A-melittin or CM, a well-known hybrid peptide, exhibits broad-spectrum antimicrobial activity, however it also possesses high toxicity. In the current study, a series of hybrid CM derivatives was designed using an amino acid substitution strategy to explore potential antibacterial and antibiofilm peptides with low toxicity. Among the derivatives, CM-10K14K showed the least hemolysis along with potent antibacterial activity against biofilm-forming S. epidermidis (MICs = 3.91 μg/mL) and rapid killing after 15 min exposure (MBCs = 7.81 μg/mL). It can prevent the formation of S. epidermidis biofilm and also exhibited a dose-dependent eradication activity on mature or established S. epidermidis biofilm. In addition, it decreased the development of biofilm by surviving bacteria, and formation of biofilm on the surface of CM-10K14K-impregnated catheters. Released CM-10K14K decreased planktonic bacterial growth and inhibited biofilm formation by S. epidermidis in a dose-dependent manner for 6 and 24 h post-exposure. Impregnation of CM-10K14K prevented bacterial attachment on catheters and thus decreased formation of extensive biofilms. SEM images supported the antibiofilm activity of CM-10K14K. Flow cytometry analysis and TEM images demonstrated a membrane-active mechanism of CM-10K14K, inducing depolarization and permeabilization, and subsequent membrane rupture leading to cell death. The presence of an interaction with bacterial DNA was verified by gel retardation assay. These antibacterial and antibiofilm activities of CM-10K14K suggest its potential application to urinary catheters for prevention of biofilm-forming colonization or for treatment of medical devices infected with S. epidermidis.
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Affiliation(s)
- Natthaporn Klubthawee
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Mathira Wongchai
- Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Ratchaneewan Aunpad
- Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, 12120, Pathum Thani, Thailand.
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22
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Albac S, Anzala N, Bonnot D, Mirfendereski H, Chavanet P, Croisier D. Efficacy of ceftaroline and rifampin, alone or combined, in a rat model of methicillin-resistant Staphylococcus epidermidis osteomyelitis without implant. Microbiol Spectr 2023; 11:e0015323. [PMID: 37791959 PMCID: PMC10715034 DOI: 10.1128/spectrum.00153-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 07/19/2023] [Indexed: 10/05/2023] Open
Abstract
IMPORTANCE Methicillin-resistant Staphylococcus epidermidis (MRSE) contributes to a high percentage of orthopedic infections, and their treatment represents a huge challenge. The present study aimed to evaluate the efficacy of ceftaroline alone or combined with rifampin in a rat MRSE osteomyelitis model and the bone penetration of ceftaroline. A ceftaroline monotherapy showed a significant bacterial reduction in infected bones after a 7-day period of treatment. The combination ceftaroline plus rifampin leveraged rifampin's bactericidal activity, shortening the duration of positive culture in infected animals. These results suggest that ceftaroline and rifampin combination therapy could represent a valuable therapeutic option for human MRSE osteomyelitis and deserves further preclinical and clinical evaluation.
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Affiliation(s)
| | | | | | - H. Mirfendereski
- Université de Poitiers, Poitiers, France
- Centre Hospitalier Universitaire de Poitiers, Poitiers, France
| | - P. Chavanet
- Vivexia, Dijon, France
- Département d’Infectiologie, Centre Hospitalier Universitaire, Dijon, France
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23
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Chiera S, Bosco F, Mollea C, Piscitello A, Sethi R, Nollo G, Caola I, Tessarolo F. Staphylococcus epidermidis is a safer surrogate of Staphylococcus aureus in testing bacterial filtration efficiency of face masks. Sci Rep 2023; 13:21807. [PMID: 38071253 PMCID: PMC10710463 DOI: 10.1038/s41598-023-49005-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/02/2023] [Indexed: 12/18/2023] Open
Abstract
Face masks play a role in reducing the spread of airborne pathogens, providing that they have a good filtration performance, are correctly fitted and maintained. Bacterial Filtration Efficiency (BFE) is a key indicator for evaluating filtration performance according to both European and US standards, requiring the use of Staphylococcus aureus loaded aerosol. However, the generation and handling of a Biohazard group 2 bacterium aerosol require a careful management of the biological risk and pose limitations to the accessibility to this method. To mitigate these drawbacks, we investigated the use of S. epidermidis ATCC 12228, a Biohazard group 1 bacterium, as surrogate in BFE test. To this end, tests with the surrogate strain were performed to tune the method. Then, three face mask models, representative for both surgical and community masks, were tested according to the standard method and then using an aerosolized suspension of S. epidermidis. BFE% values were calculated for each mask model and tested microorganisms. Results showed that BFE test can be performed using the S. epidermidis instead of S. aureus, preserving results validity and turnaround time, but reducing residual risk for laboratory operators.
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Affiliation(s)
- Silvia Chiera
- Department of Industrial Engineering, University of Trento, Trento, Italy
| | - Francesca Bosco
- DISAT-Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy.
| | - Chiara Mollea
- DISAT-Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy
| | - Amelia Piscitello
- DIATI-Department of Environment, Land and Infrastructure Engineering, Politecnico di Torino, Torino, Italy
| | - Rajandrea Sethi
- DIATI-Department of Environment, Land and Infrastructure Engineering, Politecnico di Torino, Torino, Italy
| | - Giandomenico Nollo
- Department of Industrial Engineering, University of Trento, Trento, Italy
| | - Iole Caola
- Microbiology and Virology Department, Azienda Provinciale per i Servizi Sanitari di Trento, Trento, Italy
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24
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Díaz-Navarro M, Samaniego R, Piqueras JC, Díez R, Hafian R, Manzano I, Muñoz P, Guembe M. Understanding the diagnosis of catheter-related bloodstream infection: real-time monitoring of biofilm growth dynamics using time-lapse optical microscopy. Front Cell Infect Microbiol 2023; 13:1286527. [PMID: 38125909 PMCID: PMC10731284 DOI: 10.3389/fcimb.2023.1286527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/13/2023] [Indexed: 12/23/2023] Open
Abstract
Background The differential time to positivity (DTTP) technique is recommended for the conservative diagnosis of catheter-related bloodstream infection (C-RBSI). The technique is based on a 120-minute difference between microbial growth in blood drawn through the catheter and blood drawn through a peripheral vein. However, this cut-off has failed to confirm C-RBSI caused by Candida spp. and Staphylococcus aureus. Objective We hypothesized that the biofilm of both microorganisms disperses faster than that of other microorganisms and that microbial load is rapidly equalized between catheter and peripheral blood. Therefore, our aim was to compare the biofilm dynamics of various microorganisms. Methods Biofilm of ATCC strains of methicillin-resistant Staphylococcus epidermidis, methicillin-susceptible S. aureus, Enterococcus faecalis, Escherichia coli and Candida albicans was grown on silicon disks and analyzed using time-lapse optical microscopy. The time-lapse images of biofilms were processed using ImageJ2 software. Cell dispersal time and biofilm thickness were calculated. Results The mean (standard deviation) dispersal time in C. albicans and S. aureus biofilms was at least nearly 3 hours lower than in biofilm of S. epidermidis, and at least 15 minutes than in E. faecalis and E. coli biofilms. Conclusion Our findings could explain why early dissemination of cells in C. albicans and S. aureus prevents us from confirming or ruling out the catheter as the source of the bloodstream infection using the cut-off of 120 minutes in the DTTP technique. In addition, DTTP may not be sufficiently reliable for E. coli since their dispersion time is less than the cut-off of 120 minutes.
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Affiliation(s)
- Marta Díaz-Navarro
- Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Rafael Samaniego
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Confocal Microscopy Unit, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | | | - Rafael Díez
- School of Biology, Universidad Complutense de Madrid, Madrid, Spain
| | - Rama Hafian
- School of Biology, Universidad Complutense de Madrid, Madrid, Spain
| | - Irene Manzano
- School of Biology, Universidad Complutense de Madrid, Madrid, Spain
| | - Patricia Muñoz
- Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- CIBER Enfermedades Respiratorias-CIBERES (CB06/06/0058), Madrid, Spain
- School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - María Guembe
- Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
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25
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Roese KHC, Torlone C, Cooper LA, Esposito L, Deveau AM, Röse USR, Burkholder KM. Pyrogallol impairs staphylococcal biofilm formation via induction of bacterial oxidative stress. J Appl Microbiol 2023; 134:lxad270. [PMID: 37974055 DOI: 10.1093/jambio/lxad270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 07/13/2023] [Accepted: 11/15/2023] [Indexed: 11/19/2023]
Abstract
AIMS To examine the effect of the phenolic compound pyrogallol on staphylococcal biofilm formation. METHODS AND RESULTS In crystal violet biofilm assays, pyrogallol-reduced biofilm formation in Staphylococcus epidermidis ATCC 35984, Staph. epidermidis NRRL-B41021, Staphylococcus aureus USA300, and Staph. aureus Newman, without significantly impairing bacterial viability. Pyrogallol-mediated impairment of biofilm formation was likely due to induction of bacterial oxidative stress, as its effect was greater in catalase-deficient versus WT Staph. aureus, and biofilm production was rescued by exogenous catalase. The effect of pyrogallol on staphylococcal biofilm formation mirrored that of the known oxidant hydrogen peroxide, which also reduced biofilm formation in a dose-dependent manner. CONCLUSIONS Pyrogallol reduces biofilm formation in S. aureus and Staph. epidermidis in a mechanism involving induction of bacterial oxidative stress.
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Affiliation(s)
- Katharina H C Roese
- School of Biological Sciences, University of New England, Biddeford, ME 04005, USA
| | - Christina Torlone
- School of Biological Sciences, University of New England, Biddeford, ME 04005, USA
| | - Lauren A Cooper
- School of Biological Sciences, University of New England, Biddeford, ME 04005, USA
| | - Lee Esposito
- School of Biological Sciences, University of New England, Biddeford, ME 04005, USA
| | - Amy M Deveau
- School of Mathematical and Physical Sciences, University of New England, Biddeford, ME 04005, USA
| | - Ursula S R Röse
- School of Biological Sciences, University of New England, Biddeford, ME 04005, USA
| | - Kristin M Burkholder
- School of Biological Sciences, University of New England, Biddeford, ME 04005, USA
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Guo Y, Du X, Krusche J, Beck C, Ali S, Walter A, Winstel V, Mayer C, Codée JD, Peschel A, Stehle T. Invasive Staphylococcus epidermidis uses a unique processive wall teichoic acid glycosyltransferase to evade immune recognition. Sci Adv 2023; 9:eadj2641. [PMID: 38000019 PMCID: PMC10672168 DOI: 10.1126/sciadv.adj2641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/26/2023] [Indexed: 11/26/2023]
Abstract
Staphylococcus epidermidis expresses glycerol phosphate wall teichoic acid (WTA), but some health care-associated methicillin-resistant S. epidermidis (HA-MRSE) clones produce a second, ribitol phosphate (RboP) WTA, resembling that of the aggressive pathogen Staphylococcus aureus. RboP-WTA promotes HA-MRSE persistence and virulence in bloodstream infections. We report here that the TarM enzyme of HA-MRSE [TarM(Se)] glycosylates RboP-WTA with glucose, instead of N-acetylglucosamine (GlcNAc) by TarM(Sa) in S. aureus. Replacement of GlcNAc with glucose in RboP-WTA impairs HA-MRSE detection by human immunoglobulin G, which may contribute to the immune-evasion capacities of many invasive S. epidermidis. Crystal structures of complexes with uridine diphosphate glucose (UDP-glucose), and with UDP and glycosylated poly(RboP), reveal the binding mode and glycosylation mechanism of this enzyme and explain why TarM(Se) and TarM(Sa) link different sugars to poly(RboP). These structural data provide evidence that TarM(Se) is a processive WTA glycosyltransferase. Our study will support the targeted inhibition of TarM enzymes, and the development of RboP-WTA targeting vaccines and phage therapies.
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Affiliation(s)
- Yinglan Guo
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
| | - Xin Du
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Infection Biology, University of Tübingen, Tübingen, Germany
- German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Janes Krusche
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Infection Biology, University of Tübingen, Tübingen, Germany
- German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Christian Beck
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Infection Biology, University of Tübingen, Tübingen, Germany
- German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Sara Ali
- Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Axel Walter
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Organismic Interactions/Glycobiology, University of Tübingen, Tübingen, Germany
| | - Volker Winstel
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Infection Biology, University of Tübingen, Tübingen, Germany
- German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Christoph Mayer
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Organismic Interactions/Glycobiology, University of Tübingen, Tübingen, Germany
| | | | - Andreas Peschel
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
- Interfaculty Institute of Microbiology and Infection Medicine Tübingen, Infection Biology, University of Tübingen, Tübingen, Germany
- German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | - Thilo Stehle
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
- Cluster of Excellence “Controlling Microbes to Fight Infections (CMFI)”, University of Tübingen, Tübingen, Germany
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Kim MJ, Park J, Kang M, Jeong U, Jeong D, Kang NG, Hwang SJ, Youn SH, Hwang BK, Hyun Y, Kim D. Bacteria detection and species identification at the single-cell level using super-resolution fluorescence imaging and AI analysis. Biosens Bioelectron 2023; 240:115603. [PMID: 37647686 DOI: 10.1016/j.bios.2023.115603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 08/14/2023] [Indexed: 09/01/2023]
Abstract
The skin microbiome is thought to play a critical role in maintaining skin health and protecting against infection. While most microorganisms that live on the skin are harmless or even beneficial, some can cause skin infections or other health problems, emphasizing the importance of diagnosis of the composition and diversity of the skin flora. However, conventional diagnostic methods for evaluation of the skin microbiome are not sensitive enough to detect bacteria at low concentrations and suffer from poor specificity, thus limiting early diagnosis of bacterial infections. In this study, we developed novel approaches for bacterial species detection and identification methods with single-cell sensitivity using super-resolution microscopy and AI-based image analysis: a protein quantification-based method and an AI-based bacterial image analysis method. We demonstrate that these methods can differentiate between common bacterial members of the skin flora, including Staphylococcus aureus and Staphylococcus epidermidis, and different ribotypes of Cutibacterium acnes, both in purified bacterial samples and in scaling skin samples. The advantages of these methods, including the lack of time-consuming amplification or purification steps and single-cell level detection sensitivity, allow early diagnosis of bacterial infections, even from bacterial samples at extremely low concentrations, thus showing promise as a next-generation platform for microbiome detection as single-cell diagnostics.
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Affiliation(s)
- Min Jeong Kim
- Department of Chemistry, Hanyang University, Seoul, 04763, Republic of Korea
| | - Jinyong Park
- Department of Mathematics, Inha University, Incheon, 22212, Republic of Korea
| | - Minjae Kang
- Department of Chemistry, Hanyang University, Seoul, 04763, Republic of Korea
| | - Uidon Jeong
- Department of Chemistry, Hanyang University, Seoul, 04763, Republic of Korea
| | - Dokyung Jeong
- Department of Chemistry, Hanyang University, Seoul, 04763, Republic of Korea
| | - Nae-Gyu Kang
- R&D Center, LG H&H Co., Ltd., Seoul, 07795, Republic of Korea
| | - Seung Jin Hwang
- R&D Center, LG H&H Co., Ltd., Seoul, 07795, Republic of Korea
| | - Sung Hun Youn
- R&D Center, LG H&H Co., Ltd., Seoul, 07795, Republic of Korea
| | - Bo Kyoung Hwang
- R&D Center, LG H&H Co., Ltd., Seoul, 07795, Republic of Korea
| | - Yoonsuk Hyun
- Department of Mathematics, Inha University, Incheon, 22212, Republic of Korea
| | - Doory Kim
- Department of Chemistry, Hanyang University, Seoul, 04763, Republic of Korea; Research Institute for Convergence of Basic Science, Hanyang University, Seoul, 04763, Republic of Korea; Institute of Nano Science and Technology, Hanyang University, Seoul, 04763, Republic of Korea; Research Institute for Natural Sciences, Hanyang University, Seoul, 04763, Republic of Korea.
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Casillo A, D’Angelo C, Imbimbo P, Monti DM, Parrilli E, Lanzetta R, Gomez d’Ayala G, Mallardo S, Corsaro MM, Duraccio D. Aqueous Extracts from Hemp Seeds as a New Weapon against Staphylococcus epidermidis Biofilms. Int J Mol Sci 2023; 24:16026. [PMID: 38003214 PMCID: PMC10671263 DOI: 10.3390/ijms242216026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
This study investigated the antibiofilm activity of water-soluble extracts obtained under different pH conditions from Cannabis sativa seeds and from previously defatted seeds. The chemical composition of the extracts, determined through GC-MS and NMR, revealed complex mixtures of fatty acids, monosaccharides, amino acids and glycerol in ratios depending on extraction pH. In particular, the extract obtained at pH 7 from defatted seeds (Ex7d) contained a larger variety of sugars compared to the others. Saturated and unsaturated fatty acids were found in all of the analysed extracts, but linoleic acid (C18:2) was detected only in the extracts obtained at pH 7 and pH 10. The extracts did not show cytotoxicity to HaCaT cells and significantly inhibited the formation of Staphylococcus epidermidis biofilms. The exception was the extract obtained at pH 10, which appeared to be less active. Ex7d showed the highest antibiofilm activity, i.e., around 90%. Ex7d was further fractionated by HPLC, and the antibiofilm activity of all fractions was evaluated. The 2D-NMR analysis highlighted that the most active fraction was largely composed of glycerolipids. This evidence suggested that these molecules are probably responsible for the observed antibiofilm effect but does not exclude a possible synergistic contribution by the other components.
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Affiliation(s)
- Angela Casillo
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Caterina D’Angelo
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Paola Imbimbo
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Daria Maria Monti
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Ermenegilda Parrilli
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Rosa Lanzetta
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Giovanna Gomez d’Ayala
- Institute of Polymers, Composites and Biomaterials (IPCB)-CNR, Via Campi Flegrei 34, 80078 Pozzuoli, Italy;
| | - Salvatore Mallardo
- Institute of Polymers, Composites and Biomaterials (IPCB)-CNR, Via Campi Flegrei 34, 80078 Pozzuoli, Italy;
| | - Maria Michela Corsaro
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, 80126 Napoli, Italy; (A.C.); (C.D.); (P.I.); (D.M.M.); (E.P.); (R.L.); (M.M.C.)
| | - Donatella Duraccio
- Institute of Sciences and Technologies for Sustainable Energy and Mobility (STEMS)-CNR, Strada Delle Cacce 73, 10135 Torino, Italy;
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Kareem YM, Hamad TI. Assessment of the antibacterial effect of Barium Titanate nanoparticles against Staphylococcus epidermidis adhesion after addition to maxillofacial silicone. F1000Res 2023; 12:385. [PMID: 37663198 PMCID: PMC10468664 DOI: 10.12688/f1000research.132727.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/02/2023] [Indexed: 09/05/2023] Open
Abstract
Background: Maxillofacial silicones are the most popular and acceptable material for making maxillofacial prostheses, but they are not perfect in every sense. To enhance their effectiveness, more improvements to their properties are required, such as their antimicrobial efficiency. This study assess the antibacterial effect of barium titanate nanoparticles in various percentages against staphylococcus epidermidis biofilm adhesion after addition to maxillofacial silicone. Methods: Barium titanate nanoparticles were added into VST-50 platinum silicone elastomer in four weight percentages (0.25wt%, 0.5wt%, 0.75wt% and 1wt%). 50 specimens were prepared and categorized into five groups; one control group and four experimental groups. All conducted data was statistically analyzed using (one-way ANOVA) analysis of variance, and Games-Howell multiple comparison test (significant level at p < 0.05). Shapiro-Wilk and Levene's tests were used, respectively, to evaluate the normal distribution and homogeneity of the data. Result: One-way ANOVA test revealed a highly significant difference between all groups, and Games-Howell test revealed a highly significant difference between the control group and the four experimental groups. The 0.25wt% and 0.5wt% groups revealed a highly significant difference between them and with the (0.75%wt and 0.1%wt) groups. While the 0.75wt% group revealed a significant difference with 1wt% group. Conclusions: The addition of barium titanate to VST-50 maxillofacial silicone enhanced the antibacterial activity of silicon against Staphylococcus epidermidis, and this activity seems to be concentration dependent. FTIR analysis demonstrated no chemical interaction between the Barium Titanate and the VST-50 maxillofacial silicone elastomer. SEM pictures show that the barium titanate nanopowder was effectively dispersed inside the maxillofacial silicone matrix.
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Affiliation(s)
- Yasir Mohammed Kareem
- B.D.S. Department of Prosthodontic, College of Dentistry, University of Baghdad, Baghdad, Baghdad Governorate, Iraq
| | - Thekra Ismael Hamad
- B.D.S., M.Sc., Ph.D., Prof. Department of Prosthodontic, College of Dentistry, University of Baghdad, Baghdad, Baghdad Governorate, Iraq
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Cai J, Cao XL, Wang B, Liu J, Chen MJ, Luo YZ, Zhang XL, Li P, Zheng CJ. Bioactive secondary metabolites from tomato-derived bacterium Bacillus velezensis Hnu24. Nat Prod Res 2023; 37:3964-3970. [PMID: 36622890 DOI: 10.1080/14786419.2022.2164279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 11/28/2022] [Accepted: 12/21/2022] [Indexed: 01/10/2023]
Abstract
A series of secondary metabolites have been isolated from the genus of Bacillus velezensis, most of which show antibacterial and insecticidal activities. In order to find more bioactive secondary metabolites from B. velezensis, one new natural component aminoindole dimer baciindole A (1), together with seven known compounds (2-8) were isolated from the tomato-derived bacterium Bacillus velezensis Hnu24. The structure of compound 1 was elucidated by its HR-ESI-MS spectral data and 1 D/2D NMR spectroscopic analysis. Compound 3 showed antibacterial activity against Staphylococcus aureus, S. epidermidis and Ralstonia solanacearum with the MIC values of 3.125, 12.5 and 50 μg/mL, respectively. Compound 4 showed antibacterial activity against S. aureus with the MIC value of 12.5 μg/mL. Compound 3 showed cytotoxic activity for human colon cancer HTC116 cancer cells with the IC50 value of 8.42 ± 0.48 μM. Five compounds (1-4 and 8) were obtained from the strain of B. velezensis for the first time. These results indicated that 3 will be useful in developing antimicrobial and treatment of colon cancer agents.
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Affiliation(s)
- Jin Cai
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Xiu-Lan Cao
- Key Laboratory of Tropical Islands Ecology of Ministry of Education, College of Life Sciences, Hainan Normal University, Haikou, Hainan, People's Republic of China
| | - Bin Wang
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Jing Liu
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Min-Jing Chen
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Yun-Zhan Luo
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Xue-Long Zhang
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Peng Li
- Key Laboratory of Tropical Islands Ecology of Ministry of Education, College of Life Sciences, Hainan Normal University, Haikou, Hainan, People's Republic of China
| | - Cai-Juan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou, Hainan, People's Republic of China
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31
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Liang J, Adeleye M, Onyango LA. Combinatorial efficacy of Manuka honey and antibiotics in the in vitro control of staphylococci and their small colony variants. Front Cell Infect Microbiol 2023; 13:1219984. [PMID: 37928190 PMCID: PMC10622673 DOI: 10.3389/fcimb.2023.1219984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 09/04/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction Staphylococci are among the list of problematic bacteria contributing to the global antibiotic resistance (ABR) crisis. Their ability to adopt the small colony variant (SCV) phenotype, induced by prolonged antibiotic chemotherapy, complicates staphylococcal infection control options. Novel and alternative approaches are needed to tackle staphylococcal infections and curb ABR. Manuka honey (MH), a non-antibiotic alternative is recognized for its unique antibacterial activity based on its methylglyoxal (MGO) component. Methods In this study, MH (MGO 830+) was tested in combination with gentamicin (GEN), rifampicin (RIF), or vancomycin (VA) against staphylococcal wildtype (WT) and SCVs. To our knowledge, there are no current studies in the literature documenting the effects of MH on staphylococcal SCVs. While Staphylococcus aureus is well-studied for its international ABR burden, limited data exists demonstrating the effects of MH on S. epidermidis and S. lugdunensis whose pathogenic relevance and contribution to ABR is also rising. Results & discussion The three staphylococci were most susceptible to RIF (0.06-0.24 μg/ml), then GEN (0.12-0.49 μg/ml), and lastly VA (0.49-0.96 μg/ml). The MICs of MH were 7%, 7-8%, and 6-7% (w/v), respectively. Fractional inhibitory concentration (FIC) evaluations showed that the combined MH + antibiotic effect was either additive (FICI 1-2), or partially synergistic (FICI >0.5-1). While all three antibiotics induced SCVs in vitro, stable SCVs were observed in GEN treatments only. The addition of MH to these GEN-SCV-induction analyses resulted in complete suppression of SCVs (p<0.001) in all three staphylococci, suggesting that MH's antibacterial properties interfered with GEN's SCV induction mechanisms. Moreover, the addition of MH to growth cultures of recovered stable SCVs resulted in the inhibition of SCV growth by at least 99%, indicating MH's ability to prevent subsequent SCV growth. These in vitro analyses demonstrated MH's broad-spectrum capabilities not only in improving WT staphylococci susceptibility to the three antibiotics, but also mitigated the development and subsequent growth of their SCV phenotypes. MH in combination with antibiotics has the potential to not only resensitize staphylococci to antibiotics and consequently require less antibiotic usage, but in instances where prolonged chemotherapy is employed, the development and growth of SCVs would be hampered, providing a better clinical outcome, all of which mitigate ABR.
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Ba X, Raisen CL, Restif O, Cavaco LM, Vingsbo Lundberg C, Lee JYH, Howden BP, Bartels MD, Strommenger B, Harrison EM, Larsen AR, Holmes MA, Larsen J. Cryptic susceptibility to penicillin/β-lactamase inhibitor combinations in emerging multidrug-resistant, hospital-adapted Staphylococcus epidermidis lineages. Nat Commun 2023; 14:6479. [PMID: 37838722 PMCID: PMC10576800 DOI: 10.1038/s41467-023-42245-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 10/04/2023] [Indexed: 10/16/2023] Open
Abstract
Global spread of multidrug-resistant, hospital-adapted Staphylococcus epidermidis lineages underscores the need for new therapeutic strategies. Here we show that many S. epidermidis isolates belonging to these lineages display cryptic susceptibility to penicillin/β-lactamase inhibitor combinations under in vitro conditions, despite carrying the methicillin resistance gene mecA. Using a mouse thigh model of S. epidermidis infection, we demonstrate that single-dose treatment with amoxicillin/clavulanic acid significantly reduces methicillin-resistant S. epidermidis loads without leading to detectable resistance development. On the other hand, we also show that methicillin-resistant S. epidermidis is capable of developing increased resistance to amoxicillin/clavulanic acid during long-term in vitro exposure to these drugs. These findings suggest that penicillin/β-lactamase inhibitor combinations could be a promising therapeutic candidate for treatment of a high proportion of methicillin-resistant S. epidermidis infections, although the in vivo risk of resistance development needs to be further addressed before they can be incorporated into clinical trials.
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Affiliation(s)
- Xiaoliang Ba
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Claire L Raisen
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Olivier Restif
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Lina Maria Cavaco
- Department of Bacteria, Parasites & Fungi, Statens Serum Institut, Copenhagen, Denmark
| | | | - Jean Y H Lee
- Department of Microbiology and Immunology, The University of Melbourne at The Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Benjamin P Howden
- Department of Microbiology and Immunology, The University of Melbourne at The Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Mette D Bartels
- Department of Clinical Microbiology, Copenhagen University Hospital - Amager and Hvidovre, Hvidovre, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Birgit Strommenger
- National Reference Centre for Staphylococci and Enterococci, Division Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - Ewan M Harrison
- Department of Medicine, University of Cambridge, Cambridge, UK
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- Wellcome Sanger Institute, Hinxton, UK
| | - Anders Rhod Larsen
- Department of Bacteria, Parasites & Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Mark A Holmes
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Jesper Larsen
- Department of Bacteria, Parasites & Fungi, Statens Serum Institut, Copenhagen, Denmark.
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Zheng K, Zheng X, Gan D, Zhou X. Successful antibiotic management of Staphylococcus epidermidis endophthalmitis after implantable collamer lens implantation. BMC Ophthalmol 2023; 23:410. [PMID: 37828437 PMCID: PMC10568818 DOI: 10.1186/s12886-023-03127-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 09/08/2023] [Indexed: 10/14/2023] Open
Abstract
PURPOSE We report a case of successful medical management of endophthalmitis post implantable collamer lens (ICL) culture-positive of Staphylococcus epidermidis. OBSERVATIONS A 18-year-old female presented with decreased visual acuity in the left eye 20 days after ICL implantation. A diagnosis of postoperative endophthalmitis was made based on examination and ultrasonography. A vitreous tap was taken, and intravitreal antibiotics (vancomycin 1 mg/0.1ml and ceftazidime 2 mg/0.1ml) were administered twice (every 72 h), and peribulbar injection of triamcinolone acetonide after four days of the second intravitreal injection. The vitreous culture was confirmed for Staphylococcus epidermidis. The endophthalmitis was resolved, and visual acuity improved from 6/20 to 12/20 on day 7 and 22/20 on day 38. This is the first successful medical resolution of Staphylococcus epidermidis endophthalmitis post ICL surgery without ICL explantation and vitrectomy in the V4c model. CONCLUSIONS AND IMPORTANCE In antibiotic therapy, the excellent compliance and close follow-up of this endophthalmitis patient enabled careful postoperative surveillance on the effect of antibiotic therapy, avoiding the removal of the ICL or the loss of the integrity of the eye. The risk of potential infectious endophthalmitis post-ICL surgery should be fully emphasized during preoperative counseling.
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Affiliation(s)
- Ke Zheng
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, No.19 Baoqing Road, Xuhui District, 200031, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
- Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | - Xiaohong Zheng
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, No.19 Baoqing Road, Xuhui District, 200031, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
- Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | - Dekang Gan
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, No.19 Baoqing Road, Xuhui District, 200031, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China
- Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
- Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
| | - Xingtao Zhou
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, No.19 Baoqing Road, Xuhui District, 200031, Shanghai, China.
- NHC Key Laboratory of Myopia (Fudan University), Shanghai, China.
- Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China.
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Hefzy EM, Radwan TEE, Hozayen BMM, Mahmoud EE, Khalil MAF. Antiseptics and mupirocin resistance in clinical, environmental, and colonizing coagulase negative Staphylococcus isolates. Antimicrob Resist Infect Control 2023; 12:110. [PMID: 37794413 PMCID: PMC10552417 DOI: 10.1186/s13756-023-01310-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/18/2023] [Indexed: 10/06/2023] Open
Abstract
BACKGROUND Coagulase-Negative Staphylococci (CoNS) are opportunistic and nosocomial pathogens. The excessive use of antimicrobial agents, including antiseptics, represents one of the world's major public health problems. This study aimed to test the susceptibility of CoNS to antiseptics. METHODS Out of 250 specimens collected from different sections of the hospital, 55 samples were identified as CoNS, categorized into three groups based on their sources: environmental samples (n = 32), healthcare worker carriers samples (n = 14), and clinical infection samples (n = 9). Isolates were examined for susceptibility to antibiotics and antiseptics, such as benzalkonium chloride (BC), cetyltrimethylammonium bromide (CTAB), and chlorhexidine digluconate (CHDG). Mupirocin and antiseptic resistance genes, as well as the mecA gene, were detected using polymerase chain reaction. CoNS isolates with notable resistance to antiseptics and antibiotics were identified using the API-Staph system. RESULTS A high frequency of multidrug resistance among CoNS clinical infection isolates was observed. Approximately half of the CoNS isolates from healthcare workers were susceptible to CHDG, but 93% were resistant to BC and CTAB. The frequency of antiseptics and antibiotics resistance genes in CoNS isolates was as follows: qacA/B (51/55; 92.7%), smr (22/55; 40.0%), qacG (1/55; 1.8%), qacH (6/55; 10.9%), qacJ (4/55; 7.3%), mecA (35/55; 63.6%), mupB (10/55; 18.2%), and mupA (7/55; 12.7%). A significant difference in the prevalence of smr gene and qacJ genes between CoNS isolates from healthcare workers and other isolates was reported (P value = 0.032 and ˂0.001, respectively). Four different CoNS species; S. epidermidis, S. chromogene, S. haemolyticus, and S. hominis, were identified by API. CONCLUSIONS CoNS isolates colonizing healthcare workers showed a high prevalence of antiseptic resistance genes, while clinical infection samples were more resistant to antibiotics. CHDG demonstrated greater efficacy than BC and CTAB in our hospital.
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Affiliation(s)
- Enas Mamdouh Hefzy
- Medical Microbiology and Immunology Department, Faculty of Medicine, Fayoum University, Fayoum, 63514, Egypt.
| | | | - Basma M M Hozayen
- Botany Department, Faculty of Science, Fayoum University, Fayoum, Egypt
| | - Eman E Mahmoud
- Department of Clinical and Chemical Pathology, Faculty of Medicine, Fayoum University, Fayoum, Egypt
| | - Mahmoud A F Khalil
- Microbiology and Immunology Department, Faculty of Pharmacy, Fayoum University, Fayoum, Egypt
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Fawi HMT, Papastergiou P, Khan F, Hart A, Coleman NP. Use of monofilament sutures and triclosan coating to protect against surgical site infections in spinal surgery: a laboratory-based study. Eur J Orthop Surg Traumatol 2023; 33:3051-3058. [PMID: 37000241 PMCID: PMC10504140 DOI: 10.1007/s00590-023-03534-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/20/2023] [Indexed: 04/01/2023]
Abstract
PURPOSE We investigated bacterial propagation through multifilament, monofilament sutures and whether sutures coated with triclosan would exhibit a different phenomenon. METHODS One centimetre (cm) wide trenches were cut in the middle of Columbia blood Agar plates. We tested a 6 cm length of two Triclosan-coated (PDS plus®, Vicryl plus®) and two uncoated (PDS ®, Vicryl ®) sutures. Each suture was inoculated with a bacterial suspension containing methicillin-sensitive Staphylococcus aureus (MSSA), Escherichia coli (E. coli), Staphylococcus epidermidis, methicillin-resistant Staphylococcus aureus (MRSA) at one end of each suture. The plates were incubated at 36C for 48 h, followed by room temperature for a further 5 days. We established bacterial propagation by observing for any bacterial growth on the Agar on the opposite side of the trench. RESULTS Bacterial propagation was observed on the opposite side of the trench with both suture types, monofilament PDS and multifilament Vicryl, when tested with the motile bacterium (E. coli). Propagation was not observed on the other side of the trench with the monofilament PDS suture following incubation with MSSA and S. epidermidis, and in 66% of MRSA. With multifilament suture Vicryl, propagation was observed on the other side of the trench in 90% (MSSA), 80% (S. epidermidis), and 100% (MRSA) of plates tested. No bacterial propagation was observed in any of the triclosan-coated sutures (monofilament or multifilament). CONCLUSIONS Monofilament sutures are associated in vitro with less bacterial propagation along their course when compared to multifilament sutures. Inhibition in both sutures can be further enhanced with a triclosan coating.
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Affiliation(s)
- H M T Fawi
- Trauma and Orthopaedics Department, Queen Elizabeth Hospital NHS Trust, Kings Lynn, UK.
- School of Public Health, Imperial College London, London, UK.
| | - P Papastergiou
- Microbiology Department, Limassol General Hospital, Kato Polemidia, Cyprus
- Microbiology Department, Norfolk & Norwich University Hospital NHS Trust, Norwich, UK
| | - F Khan
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | - A Hart
- Microbiology Department, Norfolk & Norwich University Hospital NHS Trust, Norwich, UK
| | - N P Coleman
- Trauma and Orthopaedics Department, Queen Elizabeth Hospital NHS Trust, Kings Lynn, UK
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Demiselle J, Meyer P, Lavigne T, Kaurin J, Merdji H, Schenck M, Studer A, Janssen-Langenstein R, Helms J, Hoellinger B, Castelain V, Grillon A, Schneider F, Meziani F, Clere-Jehl R. Staphylococcus epidermidis bloodstream infections are a cause of septic shock in intensive care unit patients. Int J Infect Dis 2023; 135:45-48. [PMID: 37517512 DOI: 10.1016/j.ijid.2023.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/16/2023] [Accepted: 07/18/2023] [Indexed: 08/01/2023] Open
Abstract
OBJECTIVES Staphylococcus epidermidis (SE) is a supposedly low-virulence agent, which may cause proven bloodstream infections (BSIs), with little-known consequences on intensive care unit (ICU) patients. We aimed at studying ICU patients diagnosed with BSIs caused by SE (SE-BSIs). METHODS We constituted a retrospective cohort in two medical ICUs. SE-BSIs were defined by two or more independent SE-positive blood cultures of the same strain, within 48 hours, without concurrent infection. RESULTS We included 59 patients; 58% were men (n = 34), with median age of 67 (interquartile range 60-74) years and a simplified acute physiology score II of 59 (36-74) points, and 56% were immunocompromised (n = 33). Among the 37 (63%) patients requiring norepinephrine initiation or increase at the onset of SE-BSI versus patients not requiring vasopressors (37%; n = 22), concomitant arterial lactate levels reached 2.8 (1.9-5.8) versus 1.5 (1.3-2.2) mmol/l (P <0.01), whereas the mean blood pressure was 49 (42-54) versus 61 (56-65) mm Hg (P = 0.01) and the mortality was 46% (n = 17) vs 14% (n = 3) at day 28 (P = 0.01), respectively. Regarding antibiotics, the susceptibility rates toward linezolid and vancomycin were 71% (n = 41/58) and 100% (n = 54/54), respectively. At the time of SE-BSI, all but one patient had a central venous access device. CONCLUSION This work highlights SE-BSIs as a cause of septic shock, mostly in immunocompromised ICU patients, with increasing concerns about resistance to antibiotics and central line management.
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Affiliation(s)
- Julien Demiselle
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France; INSERM, UMR_S1260, Regenerative Nanomedicine (RNM), CRBS, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, 1 rue Eugène Boeckel, 67000 Strasbourg, France
| | - Pierre Meyer
- Service d'Anesthésie-Réanimation, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1 place de l'hôpital, 67000 Strasbourg, France
| | - Thierry Lavigne
- Hygiène Hospitalière et Médecine Préventive, Pôle de Santé Publique, Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1 place de l'hôpital, 67000 Strasbourg, France
| | - Julian Kaurin
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France
| | - Hamid Merdji
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France; INSERM, UMR_S1260, Regenerative Nanomedicine (RNM), CRBS, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, 1 rue Eugène Boeckel, 67000 Strasbourg, France
| | - Maleka Schenck
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Hôpital de Hautepierre, 1 avenue Molière, 67200 Strasbourg, France
| | - Antoine Studer
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France
| | - Ralf Janssen-Langenstein
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Hôpital de Hautepierre, 1 avenue Molière, 67200 Strasbourg, France
| | - Julie Helms
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France; INSERM, UMR_S1260, Regenerative Nanomedicine (RNM), CRBS, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, 1 rue Eugène Boeckel, 67000 Strasbourg, France
| | - Baptiste Hoellinger
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Maladies Infectieuses et Tropicales, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France
| | - Vincent Castelain
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Hôpital de Hautepierre, 1 avenue Molière, 67200 Strasbourg, France
| | - Antoine Grillon
- UR7290, Virulence bactérienne précoce, Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Institut de bactériologie, 3 rue Koeberlé, 67000, Strasbourg, France
| | - Francis Schneider
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Hôpital de Hautepierre, 1 avenue Molière, 67200 Strasbourg, France
| | - Ferhat Meziani
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Nouvel Hôpital Civil, 1 place de l'hôpital, 67000 Strasbourg, France; INSERM, UMR_S1260, Regenerative Nanomedicine (RNM), CRBS, Centre de Recherche en Biomédecine de Strasbourg, Université de Strasbourg, 1 rue Eugène Boeckel, 67000 Strasbourg, France
| | - Raphaël Clere-Jehl
- Université de Strasbourg (UNISTRA), Faculté de Médecine, Hôpitaux Universitaires de Strasbourg, Service de Médecine Intensive-Réanimation, Hôpital de Hautepierre, 1 avenue Molière, 67200 Strasbourg, France; Laboratoire d'ImmunoRhumatologie Moléculaire, INSERM (French National Institute of Health and Medical Research), UMR_S1109, Centre de Recherche d'Immunologie et d'Hématologie, Faculté de Médecine, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, 1 place de l'hôpital, 67000 Strasbourg, France.
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Polat SE, Uytun S, Bilgiç I, Tuğcu GD. Macrophage activation syndrome induced by Staphylococcus Epidermidis in a pediatric patient with cystic fibrosis and familial Mediterranean fever. Saudi Med J 2023; 44:1061-1064. [PMID: 37777261 PMCID: PMC10541974 DOI: 10.15537/smj.2023.44.10.20230201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 09/05/2023] [Indexed: 10/02/2023] Open
Abstract
Staphylococcus epidermidis (S. epidermidis) is the most frequently isolated member of the coagulase-negative staphylococci, which colonizes the skin and mucous membranes of the human body. Despite being a component of the normal flora, S. epidermidis can act as an opportunistic pathogen and is frequently implicated in both bacterial and nosocomial infections. Macrophage activation syndrome (MAS) is a rare but potentially fatal disease that occurs as a result of increased activation and proliferation of T lymphocytes and macrophages in response to infections and immune mediated diseases. It is very rare in patients with cystic fibrosis. Here we report a case of an 8-year-old girl with cystic fibrosis and familial Mediterranean fever who developed MAS after contracting a S. epidermidis infection.
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Affiliation(s)
- Sanem Eryilmaz Polat
- From the Department of Pediatrics, Division of Pediatric Pulmonology, Ankara City Hospital, Ankara, Turkey.
| | - Salih Uytun
- From the Department of Pediatrics, Division of Pediatric Pulmonology, Ankara City Hospital, Ankara, Turkey.
| | - Işıl Bilgiç
- From the Department of Pediatrics, Division of Pediatric Pulmonology, Ankara City Hospital, Ankara, Turkey.
| | - Gokcen D. Tuğcu
- From the Department of Pediatrics, Division of Pediatric Pulmonology, Ankara City Hospital, Ankara, Turkey.
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Guarch-Pérez C, Riool M, de Boer L, Kloen P, Zaat SAJ. Bacterial reservoir in deeper skin is a potential source for surgical site and biomaterial-associated infections. J Hosp Infect 2023; 140:62-71. [PMID: 37544367 DOI: 10.1016/j.jhin.2023.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/08/2023]
Abstract
BACKGROUND The origin of surgical site and biomaterial-associated infection is still elusive. Micro-organisms contaminating the wound may come from the air in the operating theatre, the surgical team or the skin of the patient. The skin of patients is disinfected prior to surgery, but bacteria deeper in the skin (e.g. in sweat glands or sebaceous glands) may not be reached. METHODS A preliminary cohort study was performed to study the origin of surgical site and biomaterial-associated infection between May 2020 and February 2021. In order to investigate whether cutaneous microbiota colonize the wound when released from the skin upon cutting, aerobic and anaerobic bacteria were isolated, quantified and identified from the skin of 99 patients undergoing trauma surgery, before and after skin disinfection, from knife blades and from the wound directly after the first cut. RESULTS Ninety-nine percent of the patients were culture-positive before disinfection with chlorhexidine. Of these, 40% were still culture-positive after disinfection. Of these, 54% had a positive culture of the wound after cutting the skin. Twenty percent of the patients with a negative culture after disinfection had a positive wound culture after cutting the skin. Staphylococcus epidermidis and Cutibacterium acnes were the most commonly cultured bacterial species. In 9% of cases, more than 100 bacterial colonies were cultured from the wound; this may cause biomaterial-associated infection. CONCLUSION Bacteria residing in the skin and not eradicated by disinfection may enter the surgical wound upon cutting, resulting in contamination which may cause biomaterial-associated infection.
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Affiliation(s)
- C Guarch-Pérez
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - M Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - L de Boer
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - P Kloen
- Department of Orthopaedic Surgery and Sports Medicine, Amsterdam Movement Sciences, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - S A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
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Williams MR, Bagood MD, Enroth TJ, Bunch ZL, Jiang N, Liu E, Almoughrabie S, Khalil S, Li F, Brinton S, Cech NB, Horswill AR, Gallo RL. Staphylococcus epidermidis activates keratinocyte cytokine expression and promotes skin inflammation through the production of phenol-soluble modulins. Cell Rep 2023; 42:113024. [PMID: 37610872 PMCID: PMC10586132 DOI: 10.1016/j.celrep.2023.113024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 06/05/2023] [Accepted: 08/10/2023] [Indexed: 08/25/2023] Open
Abstract
Staphylococcus epidermidis is a common microbe on human skin and has beneficial functions in the skin microbiome. However, under conditions of allergic inflammation, the abundance of S. epidermidis increases, establishing potential danger to the epidermis. To understand how this commensal may injure the host, we investigate phenol-soluble modulin (PSM) peptides produced by S. epidermidis that are similar to peptides produced by Staphylococcus aureus. Synthetic S. epidermidis PSMs induce expression of host defense genes and are cytotoxic to human keratinocytes. Deletion mutants of S. epidermidis lacking these gene products support these observations and further show that PSMs require the action of the EcpA bacterial protease to induce inflammation when applied on mouse skin with an intact stratum corneum. The expression of PSMδ from S. epidermidis is also found to correlate with disease severity in patients with atopic dermatitis. These observations show how S. epidermidis PSMs can promote skin inflammation.
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Affiliation(s)
- Michael R Williams
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Michelle D Bagood
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Timothy J Enroth
- Department of Veterans Affairs Denver Health Care System, Denver, CO, USA; Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Zoie L Bunch
- Department of Chemistry and Biochemistry, University of North Carolina Greensboro, Greensboro, NC 27402, USA
| | - Nina Jiang
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Edward Liu
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Samia Almoughrabie
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Shadi Khalil
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Fengwu Li
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Samantha Brinton
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA
| | - Nadja B Cech
- Department of Chemistry and Biochemistry, University of North Carolina Greensboro, Greensboro, NC 27402, USA
| | - Alexander R Horswill
- Department of Veterans Affairs Denver Health Care System, Denver, CO, USA; Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Richard L Gallo
- Department of Dermatology, University of California, San Diego, San Diego, CA 92093, USA.
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Nguyen L, DeVico B, Mannan M, Chang M, Rada Santacruz C, Siragusa C, Everhart S, Fazen CH. Tea Tree Essential Oil Kills Escherichia coli and Staphylococcus epidermidis Persisters. Biomolecules 2023; 13:1404. [PMID: 37759804 PMCID: PMC10526169 DOI: 10.3390/biom13091404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Persister cells are a small subpopulation of non-growing bacteria within a population that can survive long exposures to antibiotic treatment. Following antibiotic removal, persister cells can regrow and populate, playing a key role in the chronic reoccurrence of bacterial infections. The development of new molecules and methods to kill bacterial persisters is critical. Essential oils and other natural products have long been studied for their antimicrobial effects. Here, we studied the effectiveness of tea tree essential oil (TTO), a common component in many commercial care products, against Escherichia coli and Staphylococcus epidermidis persister cells. Using biphasic kill curve assays, we found that concentrations of 0.5% and 1.0% TTO for E. coli and S. epidermidis, respectively, completely eradicated persister cells over a period of 24 h, with the component terpinen-4-ol responsible for most of the killing. Using a colorimetric assay, it was determined that the TTO exhibited its anti-persister effects through a membrane disruption mechanism.
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Affiliation(s)
| | | | | | | | | | | | | | - Christopher H. Fazen
- Department of Chemistry, Drew University, Madison, NJ 07940, USA; (L.N.); (B.D.); (M.M.); (M.C.); (C.R.S.); (C.S.); (S.E.)
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Armeftis C, Ioannou A, Lazarou T, Giannopoulos A, Dimitriadou E, Makrides K, Pana ZD. Staphylococcus epidermidis induced toxic shock syndrome (TSS) secondary to influenza infection. BMC Infect Dis 2023; 23:583. [PMID: 37674134 PMCID: PMC10481523 DOI: 10.1186/s12879-023-08487-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 07/27/2023] [Indexed: 09/08/2023] Open
Abstract
BACKGROUND To date, few cases of TSS caused by coagulase negative (CoN) staphylococci have been reported in the literature. Recent data show that CoN staphylococci are capable of secreting a number of enterotoxins and cytotoxins, normally produced by S. aureus. Herewith, we describe a case of TSS caused by Staphylococcus epidermidis with a favorable outcome. CASE PRESENTATION We report a case of a 46-year-old man who developed TSS from S. epidermidis. The patient was admitted for a 7-day history of general malaise and headache following a recent influenza infection and a 3-day history of vomiting, diarrhea, diffuse erythroderma, and fever. The main laboratory findings on admission were leukopenia (WBC 800/mm3), thrombocytopenia (Plt count 78.000/mm3), elevated urea, creatine levels and increased inflammatory markers (CRP 368 mg/ml). The patient had clinical and radiological evidence of pneumonia with chest computed tomography (CT) showing diffuse bilateral airspace opacifications with air bronchogram. On the second day, a methicillin resistant S. epidermidis (MRSE) strain was detected in both sets of blood cultures, but the organism was unavailable for toxin testing. All other cultures and diagnostic PCR tests were negative. His clinical signs and symptoms fulfilled at that stage four out of five clinical criteria of TSS with a fever of 39 °C, diffuse erythroderma, multisystem involvement and hypotension. On the same day the patient was admitted to the ICU due to acute respiratory failure. The initial treatment was meropenem, vancomycin, levofloxacin, clindamycin, IVIG and steroids. Finger desquamation appeared on the 9th day of hospitalization, fulfilling all five clinical criteria for TSS. CONCLUSIONS To our knowledge, this is the first adult case with TSS induced by CoNS (MRSE) secondary to an influenza type B infection, who had favorable progression and outcome. Further research is warranted to determine how TSS is induced by the CoNS infections.
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Affiliation(s)
- Charis Armeftis
- Ygia Polyclinic Private Hospital, 21 Nafpliou Str, Limassol, 3025, Cyprus
- Medical School, European University, 6, Diogenous Str, Engomi, 2404, Nicosia, Cyprus
| | - Andreas Ioannou
- Ygia Polyclinic Private Hospital, 21 Nafpliou Str, Limassol, 3025, Cyprus
| | | | | | | | | | - Zoi Dorothea Pana
- Medical School, European University, 6, Diogenous Str, Engomi, 2404, Nicosia, Cyprus.
- Infection Control and Antimicrobial Stewardship Medical School, EUC, Engomi, Nicosia, Cyprus.
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Pérez-Narváez OA, Castillo Hernández S SL, Leos-Rivas C, Pérez-Hernández RA, Chávez-Montes A, Verduzco-Martínez JA, Sánchez-García E. Antibacterial Effect of Ethanolic Extracts of Dodonaea viscosa L. Jacq. and Mammea americana L. against Staphylococci Isolated from Skin Lesions. Biomed Res Int 2023; 2023:5584412. [PMID: 37700878 PMCID: PMC10495233 DOI: 10.1155/2023/5584412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/30/2023] [Accepted: 08/22/2023] [Indexed: 09/14/2023]
Abstract
Background The resistance to antibiotics shown by some dermatological pathogenic microorganisms has increased the interest of pharmaceutical and cosmetic industries in developing natural products that possess different biological activities, including antimicrobial effects. Methods In the present investigation, the antibacterial activity of ethanolic extracts of Dodonaea viscosa aerial part and Mammea americana leaves and seed was evaluated against resistant strains of Staphylococcus isolated from skin lesions and against S. aureus ATCC 25923 (reference strain). Column chromatography (CC) and preparative thin-layer chromatography (PTLC) were used to obtain separate fractions of the seed extract of M. americana. We also determined the antimicrobial resistance of the strains against antibiotics using the agar disc diffusion assay. In addition, phytochemical screening was performed by colorimetric standard techniques. Results M. americana seed extract showed the highest antibacterial activity with MBC from 2.3 μg/mL to 19.5 μg/mL without differences with gentamicin (p = 0.998). The isolated strain S. epidermidis I showed the highest antimicrobial resistance against the tested antibiotics. PTLC-fractions of M. americana seed extract showed MBC from 3.2 μg/mL to 40.7 μg/mL against S. epidermidis I and S. aureus 25923 (reference), respectively, which suggests a synergistic effect of the secondary metabolites present in the crude ethanolic extract compared to its active PTLC-fractions, where only coumarins and compounds with lactone groups were detected in the phytochemical screening. Conclusion M. americana seed extract has promising effects that should be considered in further studies as an alternative or adjuvant in treating skin infections caused by staphylococci.
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Affiliation(s)
- Oscar Alberto Pérez-Narváez
- Department of Chemistry, Laboratory of Analytical Chemistry, Universidad Autónoma de Nuevo León, Faculty of Biological Sciences, San Nicolás de los Garza, Nuevo León C.P. 66455, Mexico
| | | | - Catalina Leos-Rivas
- Department of Chemistry, Laboratory of Analytical Chemistry, Universidad Autónoma de Nuevo León, Faculty of Biological Sciences, San Nicolás de los Garza, Nuevo León C.P. 66455, Mexico
| | - Raymundo Alejandro Pérez-Hernández
- Department of Chemistry, Laboratory of Analytical Chemistry, Universidad Autónoma de Nuevo León, Faculty of Biological Sciences, San Nicolás de los Garza, Nuevo León C.P. 66455, Mexico
| | - Abelardo Chávez-Montes
- Department of Chemistry, Laboratory of Analytical Chemistry, Universidad Autónoma de Nuevo León, Faculty of Biological Sciences, San Nicolás de los Garza, Nuevo León C.P. 66455, Mexico
| | - Jorge Armando Verduzco-Martínez
- Department of Cell Biology and Genetics, Faculty of Biological Sciences, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León C.P. 66455, Mexico
| | - Eduardo Sánchez-García
- Department of Chemistry, Laboratory of Analytical Chemistry, Universidad Autónoma de Nuevo León, Faculty of Biological Sciences, San Nicolás de los Garza, Nuevo León C.P. 66455, Mexico
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Ruffilli A, Barile F, Fiore M, Manzetti M, Viroli G, Mazzotti A, Govoni M, De Franceschi L, Dallari D, Faldini C. Allogenic bone grafts and postoperative surgical site infection: are positive intraoperative swab cultures predictive for a higher infectious risk? Cell Tissue Bank 2023; 24:627-637. [PMID: 36571669 DOI: 10.1007/s10561-022-10061-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 12/04/2022] [Indexed: 12/27/2022]
Abstract
In spine surgery, allogenic bone grafts are often required to ensure bone fusion, however, the main concern regarding their use is the infection risk: therefore, an intraoperative swab for culture test is performed. The cost-effectiveness of these swabs and their influence on the patients' postoperative course have often been questioned. This study aims at determining whether positive spine allograft culture results are predictive of an increased risk of surgical site infection and whether they influence the surgeon's choices in postoperative management. The records of 340 patients who received allogenic bone graft during spinal fusion surgery in our institution were reviewed, for a total of 677 allografts. Each graft was swabbed intraoperatively. All patients were followed clinically for postoperative complications. Infection was diagnosed based on clinical data, blood tests and radiographic images, all assessed by an infectious disease specialist. Only 4 of the 677 allografts used (0.6%) resulted positive at the intraoperative swab culture. Three cultures were positive for Staphylococcus epidermidis and one culture for S. warneri. No clinical infection occurred in any of these patients. Twenty-eight of the 340 patients (8.2%) developed an infection, but none of them had a positive intraoperative swab culture. The most common microbiologic pathogen isolated from this cohort was S. aureus. According to our series, intraoperative swab culture results were not predictive for higher risk of infection and did not affect the clinical behavior of the surgeons in postoperative management.
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Affiliation(s)
- Alberto Ruffilli
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy
- 1st Orthopaedic and Traumatologic Clinic, IRCCS Rizzoli Orthopaedic Institute, Via G. C. Pupilli 1, 40136, Bologna, Italy
| | - Francesca Barile
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy.
| | - Michele Fiore
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy
| | - Marco Manzetti
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy
| | - Giovanni Viroli
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy
| | - Antonio Mazzotti
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy
- 1st Orthopaedic and Traumatologic Clinic, IRCCS Rizzoli Orthopaedic Institute, Via G. C. Pupilli 1, 40136, Bologna, Italy
| | - Marco Govoni
- Reconstructive Orthopaedic Surgery and Innovative Techniques Clinic - Musculoskeletal Tissue Bank, IRCCS Rizzoli Orthopaedic Institute, Via G.C. Pupilli 1, 40136, Bologna, Italy
| | - Lucia De Franceschi
- Reconstructive Orthopaedic Surgery and Innovative Techniques Clinic - Musculoskeletal Tissue Bank, IRCCS Rizzoli Orthopaedic Institute, Via G.C. Pupilli 1, 40136, Bologna, Italy
| | - Dante Dallari
- Reconstructive Orthopaedic Surgery and Innovative Techniques Clinic - Musculoskeletal Tissue Bank, IRCCS Rizzoli Orthopaedic Institute, Via G.C. Pupilli 1, 40136, Bologna, Italy
| | - Cesare Faldini
- Alma Mater Studiorum - University of Bologna, Via Zamboni 33, 40126, Bologna, Italy
- 1st Orthopaedic and Traumatologic Clinic, IRCCS Rizzoli Orthopaedic Institute, Via G. C. Pupilli 1, 40136, Bologna, Italy
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Sahal G, Donmez HG, Beksac MS. Cervicovaginal Bacillus velezensis Isolate: A Potential Probiotic and an Antagonist Against Candida and Staphylococcus. Curr Microbiol 2023; 80:332. [PMID: 37642756 DOI: 10.1007/s00284-023-03447-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 08/10/2023] [Indexed: 08/31/2023]
Abstract
The cervicovaginal microbiota is an essential aspect of women's reproductive and overall health. In this study, we aimed to evaluate the probiotic properties of a cervicovaginal isolate, obtained from a gynecologically healthy woman and assess its antagonistic effect against various microorganisms isolated from the vagina. Cytological examination was performed using Papanicolaou staining, and the isolated microorganism was identified via 16S Ribosomal RNA Gene Sequence Analysis. Probiotic characteristics were evaluated by determining the tolerance of the isolate to low pH, different NaCl concentrations, and bile salts. Bacterial adherence to stainless steel sheets, antibiotic susceptibility, and antimicrobial activity tests were also conducted and analyzed. Antimicrobial tests and antagonistic activities were assessed through disc diffusion assays. The cervicovaginal isolate was identified as B. velezensis ON116948 and was found to be tolerant to low pH, high NaCl and 0.3% bile salts. Additionally, it exhibited adherence. With the exception of amoxicillin/clavulanic acid (AMC) (30 μg) and oxacillin (OX) (1 μg), this isolate was susceptible to all the antibiotics tested. Candida species did not grow on B. velezensis spread media, while B. velezensis was able to grow on C. albicans, C. glabrata, C. tropicalis, S. condimenti and S. epidermidis spread media with growth zones of 13.7 ± 0.6, 13.3 ± 0.6, 14.2 ± 4.4, 10.5 ± 0.5 and 16.0 ± 1.0 (around discs), respectively. Our findings suggest that the cervicovaginal B. velezensis ON116948 isolate exhibits probiotic properties and antagonistic activity. These results provide important insights into the potential use of this isolate as a probiotic for the prevention of vaginal infections.
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Affiliation(s)
- Gulcan Sahal
- Department of Biology (Biotechnology), Faculty of Science, Hacettepe University, Ankara, Turkey.
| | - Hanife Guler Donmez
- Department of Biology (General Biology), Faculty of Science, Hacettepe University, Ankara, Turkey
| | - Mehmet Sinan Beksac
- Department of Obstetrics and Gynecology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Masuda-Kuroki K, Alimohammadi S, Di Nardo A. S. epidermidis Rescues Allergic Contact Dermatitis in Sphingosine 1-Phosphate Receptor 2-Deficient Skin. Int J Mol Sci 2023; 24:13190. [PMID: 37685997 PMCID: PMC10487941 DOI: 10.3390/ijms241713190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/19/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023] Open
Abstract
Recent studies have identified a subtype of the S1P-receptor family called sphingosine-1-phosphate receptor 2 (S1PR2), which plays a crucial role in maintaining the skin barrier. It has been observed that S1PR2 and Staphylococcus epidermidis (S. epidermidis) work together to regulate the skin barrier. However, the interaction between these two factors is still unclear. To investigate this, a study was conducted on healthy skin and allergic contact dermatitis (ACD) using 3,4-Dibutoxy-3-cyclobutene-1,2-dione (SADBE) on the ears of S1pr2fl/fl and S1pr2fl/flK14-Cre mice and using 1 × 106 CFU of S. epidermidis to examine its effects on the skin. The results showed that in S. epidermidis-conditioned ACD, the ear thickness of S1pr2fl/flK14-Cre mice was lower than that of S1pr2fl/fl mice, and mRNA expressions of Il-1β and Cxcl2 of S1pr2fl/flK14-Cre mice were lower than that of S1pr2fl/fl mice in ACD with S. epidermidis. Furthermore, the gene expression of Claudin-1 and Occludin in S1pr2fl/flK14-Cre mice was higher than that of S1pr2fl/fl mice in ACD with S. epidermidis. The study concludes that S. epidermidis colonization improves the skin barrier and prevents ACD even when S1P signaling malfunctions.
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Affiliation(s)
| | | | - Anna Di Nardo
- Department of Dermatology, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; (K.M.-K.); (S.A.)
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Ravera S, Tancreda G, Vezzulli L, Schito AM, Panfoli I. Cirsiliol and Quercetin Inhibit ATP Synthesis and Decrease the Energy Balance in Methicillin-Resistant Staphylococcus aureus (MRSA) and Methicillin-Resistant Staphylococcus epidermidis (MRSE) Strains Isolated from Patients. Molecules 2023; 28:6183. [PMID: 37687012 PMCID: PMC10488605 DOI: 10.3390/molecules28176183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/19/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Polyphenols have attracted attention in the fight against antibiotic-resistant bacteria, as they show antibacterial action. Considering that polyphenols inhibit F1Fo-ATP synthase (ATP synthase) and that bacteria need a constant energy production to maintain their homeostasis, we evaluated the effect of two flavones, cirsiliol (tri-hy-droxy-6,7-dimethoxyflavone) and quercetin (3,3,4,5,7-pentahydroxyflavone), on energy production and intracellular ATP content in a methicillin-resistant Staphylococcus aureus (MRSA) strain and a methicillin-resistant Staphylococcus epidermidis (MRSE) strain isolated from patients, comparing the results to those obtained by treating the bacteria with oligomycin, a specific ATP synthase Fo moiety inhibitor. Real-time quantitative ATP synthesis and total ATP content of permeabilized Gram-positive bacteria were assayed by luminometry. The results showed that cirsiliol and quercetin inhibited ATP synthase and decreased the intracellular ATP levels in both strains, although the effect was higher in MRSE. In addition, while cirsiliol and quercetin acted immediately after the treatment, oligomycin inhibited ATP synthesis only after 30 min of incubation, suggesting that the different responses may depend on the different permeability of the bacterial wall to the three molecules. Thus, cirsiliol and quercetin could be considered potential additions to antibiotics due to their ability to target ATP synthase, against which bacteria cannot develop resistance.
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Affiliation(s)
- Silvia Ravera
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy; (S.R.)
| | - Gabriele Tancreda
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy; (S.R.)
| | - Luigi Vezzulli
- Department of Earth, Environmental and Life Sciences (DISTAV), University of Genoa, Corso Europa 26, 16132 Genoa, Italy
| | - Anna Maria Schito
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, 16132 Genoa, Italy
| | - Isabella Panfoli
- Department of Pharmacy (DIFAR), University of Genoa, 16132 Genoa, Italy
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Poudel I, Annaji M, Zhang C, Panizzi PR, Arnold RD, Kaddoumi A, Amin RH, Lee S, Shamsaei N, Babu RJ. Gentamicin Eluting 3D-Printed Implants for Preventing Post-Surgical Infections in Bone Fractures. Mol Pharm 2023; 20:4236-4255. [PMID: 37455392 DOI: 10.1021/acs.molpharmaceut.3c00373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
A surgically implantable device is an inevitable treatment option for millions of people worldwide suffering from diseases arising from orthopedic injuries. A global paradigm shift is currently underway to tailor and personalize replacement or reconstructive joints. Additive manufacturing (AM) has provided dynamic outflow to the customized fabrication of orthopedic implants by enabling need-based design and surface modification possibilities. Surgical grade 316L Stainless Steel (316L SS) is promising with its cost, strength, composition, and corrosion resistance to fabricate 3D implants. This work investigates the possibilities of application of the laser powder bed fusion (L-PBF) technique to fabricate 3D-printed (3DP) implants, which are functionalized with a multilayered antimicrobial coating to treat potential complications arising due to postsurgical infections (PSIs). Postsurgical implant-associated infection is a primary reason for implantation failure and is complicated mainly by bacterial colonization and biofilm formation at the installation site. PLGA (poly-d,l-lactide-co-glycolide), a biodegradable polymer, was utilized to impart multiple layers of coating using the airbrush spray technique on 3DP implant surfaces loaded with gentamicin (GEN). Various PLGA-based polymers were tested to optimize the ideal lactic acid: glycolic acid ratio and molecular weight suited for our investigation. 3D-Printed PLGA-GEN substrates sustained the release of gentamicin from the surface for approximately 6 weeks. The 3DP surface modification with PLGA-GEN facilitated cell adhesion and proliferation compared to control surfaces. The cell viability studies showed that the implants were safe for application. The 3DP PLGA-GEN substrates showed good concentration-dependent antibacterial efficacy against the common PSI pathogen Staphylococcus aureus (S. aureus) and Staphylococcus epidermidis (S. epidermidis). The GEN-loaded substrates demonstrated antimicrobial longevity and showed significant biofilm growth inhibition compared to control. The substrates offered great versatility regarding the in vitro release rates, antimicrobial properties, and biocompatibility studies. These results radiate great potential in future human and veterinary clinical applications pertinent to complications arising from PSIs, focusing on personalized sustained antibiotic delivery.
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Affiliation(s)
- Ishwor Poudel
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Manjusha Annaji
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Chu Zhang
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Peter R Panizzi
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Robert D Arnold
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Amal Kaddoumi
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Rajesh H Amin
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
| | - Seungjong Lee
- Department of Mechanical Engineering, Samuel Ginn College of Engineering, Auburn University, Auburn, Alabama 36849, United States
- National Center for Additive Manufacturing Excellence (NCAME), Auburn University, Auburn, Alabama 36849, United States
| | - Nima Shamsaei
- Department of Mechanical Engineering, Samuel Ginn College of Engineering, Auburn University, Auburn, Alabama 36849, United States
- National Center for Additive Manufacturing Excellence (NCAME), Auburn University, Auburn, Alabama 36849, United States
| | - R Jayachandra Babu
- Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama 36849, United States
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Kim S, Choi JP, Oh DH, Ahn MY, Yang E. Increased incidence of teicoplanin-non-susceptible Staphylococcus epidermidis strains: a 6-year retrospective study. Sci Rep 2023; 13:12582. [PMID: 37537250 PMCID: PMC10400644 DOI: 10.1038/s41598-023-39666-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 07/28/2023] [Indexed: 08/05/2023] Open
Abstract
Glycopeptide antibiotics (vancomycin and teicoplanin) are usually used for the treatment of Staphylococcus epidermidis infections owing to their increased oxacillin resistance. However, S. epidermidis strains with decreased susceptibility to teicoplanin have become increasingly incident in recent years. We aimed to identify the characteristics of teicoplanin-non-susceptible (Teico-NS) S. epidermidis isolated at our hospital and analyze its relationship with teicoplanin usage. We retrospectively evaluated 328 S. epidermidis strains isolated from clinical isolates between January 2016 and December 2021. All strains were susceptible to vancomycin (minimal inhibitory concentration (MIC) ≤ 4 mg/L). The annual incidence for S. epidermidis strains with an elevated teicoplanin MIC of 8 mg/L ranged from 22.2 to 28.9%. In addition, in 2021, the number of S. epidermidis strains with teicoplanin MIC ≥ 16 mg/L rapidly increased (n = 13, 32.5%). Furthermore, teicoplanin use increased annually until 2019; however, in 2020, it decreased abruptly due to the COVID 19 pandemic. Thus, we could not confirm the existence of a clear correlation between teicoplanin usage and increased incidence of S. epidermidis with reduced teicoplanin-susceptibility. We showed the increased incidence of Teico-NS S. epidermidis in recent years. Further studies are needed to identify the mechanisms and risk factors for teicoplanin-resistance in S. epidermidis.
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Affiliation(s)
- Subin Kim
- Division of Infectious Disease, Seoul Medical Center, 156, Sinnae-ro, Jungnang-gu, Seoul, 05505, Republic of Korea
| | - Jae-Phil Choi
- Division of Infectious Disease, Seoul Medical Center, 156, Sinnae-ro, Jungnang-gu, Seoul, 05505, Republic of Korea
| | - Dong Hyun Oh
- Division of Infectious Disease, Seoul Medical Center, 156, Sinnae-ro, Jungnang-gu, Seoul, 05505, Republic of Korea
| | - Mi Young Ahn
- Division of Infectious Disease, Seoul Medical Center, 156, Sinnae-ro, Jungnang-gu, Seoul, 05505, Republic of Korea
| | - Eunmi Yang
- Division of Infectious Disease, Seoul Medical Center, 156, Sinnae-ro, Jungnang-gu, Seoul, 05505, Republic of Korea.
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Bayan R, Tauseef I, Hussain M, Ahmed MS, Haider A, Khalil AA, Islam SU, Subhan F. Fish collagen peptides' modulating effect on human skin microbiota against pathogenic Staphylococcus aureus. Future Microbiol 2023; 18:795-807. [PMID: 37650688 DOI: 10.2217/fmb-2022-0208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023] Open
Abstract
Aim: The current research aims to design effective strategies to enhance the body's immune system against pathogenic bacteria. Methods: Skin commensals were isolated, identified and cultured in fish collagen peptides (FCPs). Results: After culturing in FCP, the skin commensals were used in a dose-dependent manner for Staphylococcus aureus in a dual-culture test, which showed significant growth inhibition of the pathogenic bacteria, which concluded that FCP induced the immune defense system of skin microbiota against pathogenic strains. Conclusion: Results have validated that fish collagen peptide plays a vital role in the growth of selected human skin flora and induces more defensive immunity against pathogenic S. aureus bacteria in dual-culture experimentation.
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Affiliation(s)
- Rasol Bayan
- Department of Microbiology, Hazara University Mansehra, Mansehra, 21300, Pakistan
| | - Isfahan Tauseef
- Department of Microbiology, Hazara University Mansehra, Mansehra, 21300, Pakistan
| | - Mubashir Hussain
- Department of Microbiology, Kohat University of Science & Technology (KUST), Kohat, 26010, Pakistan
| | - Muhammad S Ahmed
- Department of Biological Sciences, National University of Medical Sciences (NUMS), Rawalpindi, 46000, Pakistan
| | - Adnan Haider
- Department of Biological Sciences, National University of Medical Sciences (NUMS), Rawalpindi, 46000, Pakistan
| | - Atif Ak Khalil
- Department of Pharmacognosy, Lahore College for Women University, Lahore, 54600, Pakistan
| | - Salman U Islam
- Department of Pharmacy, CECOS University, Peshawar, 25000, Pakistan
| | - Fazli Subhan
- Department of Biological Sciences, National University of Medical Sciences (NUMS), Rawalpindi, 46000, Pakistan
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50
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Affiliation(s)
- Taylor L Burke
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - M E Rupp
- Department of Internal Medicine, Division of Infectious Diseases, University of Nebraska Medical Center, Omaha, NE, USA
| | - P D Fey
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA.
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