1
|
Wiegand C, Fink S, Mogrovejo DC, Ruhlandt M, Wiencke V, Eberlein T, Brill FHH, Tittelbach J. A standardized wound infection model for antimicrobial testing of wound dressings in vitro. Int Wound J 2024; 21:e14811. [PMID: 38477866 DOI: 10.1111/iwj.14811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 03/14/2024] Open
Abstract
To investigate the effectiveness of antimicrobial agents against wound infections, experiments using either 2D cultures with planktonic microorganisms or animal infection models are frequently carried out. However, the transferability of the results to human skin is limited by the lack of complexity of the 2D models or by the poor translation of the results from animal models. Hence, there is a need for wound infection models capable of assessing antimicrobial agents. In this study, an easily standardized wound infection model was established. This model consists of a mechanically wounded human skin model on a collagen matrix infected with various clinically relevant bacteria. Infection of the model led to recognition of the pathogens and induction of an inflammatory response. The untreated infection spread over time, causing significant tissue damage. By applying an antimicrobial-releasing wound dressing, the bacterial load could be reduced and the success of the treatment could be further measured by a decrease in the inflammatory reaction. In conclusion, this wound infection model can be used to evaluate new antimicrobial therapeutics as well as to study host-pathogen interactions.
Collapse
Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology, Jena University Hospital, Jena, Germany
| | - Sarah Fink
- Department of Dermatology, Jena University Hospital, Jena, Germany
| | - Diana C Mogrovejo
- Dr. Brill + Partner GmbH, Institute for Hygiene and Microbiology, Hamburg, Germany
| | - Marina Ruhlandt
- Dr. Brill + Partner GmbH, Institute for Hygiene and Microbiology, Hamburg, Germany
| | - Vanessa Wiencke
- Dr. Brill + Partner GmbH, Institute for Hygiene and Microbiology, Hamburg, Germany
| | | | - Florian H H Brill
- Dr. Brill + Partner GmbH, Institute for Hygiene and Microbiology, Hamburg, Germany
| | - Jörg Tittelbach
- Department of Dermatology, Jena University Hospital, Jena, Germany
| |
Collapse
|
2
|
Moses IB, Santos FF, Gales AC. Human Colonization and Infection by Staphylococcus pseudintermedius: An Emerging and Underestimated Zoonotic Pathogen. Microorganisms 2023; 11:microorganisms11030581. [PMID: 36985155 PMCID: PMC10057476 DOI: 10.3390/microorganisms11030581] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/19/2023] [Accepted: 02/21/2023] [Indexed: 03/03/2023] Open
Abstract
S. pseudintermedius is a known resident of the skin and mucous membranes and a constituent of the normal microbiota of dogs. It has also been recognized as an opportunistic and zoonotic pathogen that is able to colonize humans and cause severe diseases, especially in immunocompromised hosts. Most importantly, methicillin-resistant S. pseudintermedius (MRSP), which is intrinsically multidrug-resistant, has emerged with serious public health consequences. The epidemiological situation is further exacerbated with reports of its zoonotic transmission and human infections which have been mostly attributed to the increasing frequency of dog ownership and close contact between dogs and humans. Evidence on the zoonotic transmission of MRSP from pet dogs to humans (such as dog owners, small-animal veterinarians, and other people in close proximity to dogs) is limited, especially due to the misidentification of S. pseudintermedius as S. aureus. Despite this fact, reports on the increasing emergence and spread of MRSP in humans have been increasing steadily over the years since its first documented report in 2006 in Belgium. The emergence of MRSP strains has further compromised treatment outcomes in both veterinary and human medicine as these strains are resistant to beta-lactam antimicrobials usually prescribed as first line treatment. Frustratingly, the limited awareness and surveillance of the zoonotic transmission of S. pseudintermedius have underestimated their extent of transmission, prevalence, epidemiology, and public health significance. In order to fill this gap of information, this review focused on detailed reports on zoonotic transmission, human colonization, and infections by S. pseudintermedius, their pathogenic features, antimicrobial resistance profiles, epidemiology, risk factors, and treatment. In writing this review, we searched Web of Science, PubMed, and SCOPUS databases using the keyword “Staphylococcus pseudintermedius AND humans”. A phylogenetic tree to determine the genetic relatedness/diversity of publicly available genomes of S. pseudintermedius was also constructed.
Collapse
Affiliation(s)
- Ikechukwu Benjamin Moses
- Department of Internal Medicine, Division of Infectious Diseases, Escola Paulista de Medicina/Universidade Federal de São Paulo, Universidade Federal de São Paulo–UNIFESP, São Paulo 04039-032, Brazil
- Department of Applied Microbiology, Faculty of Sciences, Ebonyi State University, Abakaliki PMB 053, Nigeria
| | - Fernanda Fernandes Santos
- Department of Internal Medicine, Division of Infectious Diseases, Escola Paulista de Medicina/Universidade Federal de São Paulo, Universidade Federal de São Paulo–UNIFESP, São Paulo 04039-032, Brazil
| | - Ana Cristina Gales
- Department of Internal Medicine, Division of Infectious Diseases, Escola Paulista de Medicina/Universidade Federal de São Paulo, Universidade Federal de São Paulo–UNIFESP, São Paulo 04039-032, Brazil
- Correspondence:
| |
Collapse
|
3
|
Moses IB, Esimone CO, Iroha IR, Rubin JE, Sniatynsky MK, Ribeiro ÁCDS, Santos FF, Cayo da Silva R, Gales AC. Antibiotypes and high frequency of toxin genes in methicillin-resistant Staphylococcus pseudintermedius from nares of dogs and dog guardians in Nigeria. Comp Immunol Microbiol Infect Dis 2022; 89:101870. [PMID: 36088796 DOI: 10.1016/j.cimid.2022.101870] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 08/31/2022] [Accepted: 09/02/2022] [Indexed: 10/14/2022]
Abstract
To determine the antibiotypes and frequency of toxin genes in methicillin-resistant Staphylococcus pseudintermedius (MRSP), 281 nasal swab samples were collected from dogs and dog guardians in Abakaliki, Southeastern Nigeria. Antimicrobial susceptibility testing was determined by disc diffusion technique while detection of toxin genes was carried out by PCR. Exactly 41 (28.7 %) and 6 (4.3 %) MRSP were obtained from dogs and dog guardians respectively. Isolates exhibited resistance (100-16.7 %) to amoxicillin-clavulanic acid, cephalosporins, fluoroquinolones, and carbapenems. Seccanine, lukD, siet, and exi toxin genes were harboured by 42 (89.4 %), 47 (100 %), 37 (78.7 %), and 2 (4.3 %) MRSP isolates respectively. This study has shown that dogs and dog guardians in Abakaliki, Southeastern Nigeria are colonized by multiple drug-resistant MRSP which harbour toxin genes. This represents a significant public health problem in veterinary and human medicine.
Collapse
Affiliation(s)
- Ikechukwu Benjamin Moses
- Department of Applied Microbiology, Faculty of Sciences, Ebonyi State University, P.M.B. 053, Abakaliki, Nigeria; Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil.
| | - Charles Okechukwu Esimone
- Department of Pharmaceutical Microbiology and Biotechnology, Faculty of Pharmaceutical Sciences, Nnamdi Azikiwe University, Awka, Nigeria
| | - Ifeanyichukwu Romanus Iroha
- Department of Applied Microbiology, Faculty of Sciences, Ebonyi State University, P.M.B. 053, Abakaliki, Nigeria
| | - J E Rubin
- Department of Veterinary Microbiology, Western College of Veterinary Medicine (WCVM), University of Saskatchewan, Canada
| | - M K Sniatynsky
- Department of Veterinary Microbiology, Western College of Veterinary Medicine (WCVM), University of Saskatchewan, Canada
| | - Ághata Cardoso da Silva Ribeiro
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| | - Fernanda Fernandes Santos
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| | - Rodrigo Cayo da Silva
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| | - Ana Cristina Gales
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo - UNIFESP, Rua Pedro de Toledo, 781, São Paulo SP, Brazil
| |
Collapse
|
4
|
Galantini MPL, Leal LS, Rodrigues KB, Ribeiro IS, Pereira IS, Gonçalves CV, Calado SPM, Santos DPD, Muniz IPR, Silva RAADA. Physical activity reduces intradermal bacterial load in a murine model submitted to forced swim training - a pilot study. AN ACAD BRAS CIENC 2022; 94:e20200561. [PMID: 35703689 DOI: 10.1590/0001-3765202220200561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 07/15/2020] [Indexed: 11/22/2022] Open
Abstract
Regular exercise is beneficial to health. This study evaluated the effects of moderate and intense physical exercise modalities on intradermal infection by Staphylococcus aureus in a murine model. Mice that practiced moderate exercise had lower bacterial load on lymph nodes and less inflammatory infiltrate in dermis. They presented greater weight, however, less amount of epididymal fat: the weight was increased while they had fat diminished. A positive correlation was observed between lipid content and bacterial load in mice trained at moderate intensity. Animals that were under high intensity exercises presented superior bacterial load on the lymph nodes, increased neutrophil count and circulating lymphocytes, and had leukocyte recruitment to the dermis augmented, when compared to the ones in moderate exercise. These findings suggest that moderate physical activity modulates the immune response in dermal infection caused by S. aureus in a murine model.
Collapse
Affiliation(s)
- Maria P L Galantini
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Lorena S Leal
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Karine B Rodrigues
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Israel S Ribeiro
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Italo S Pereira
- Universidade de São Paulo (USP), Faculdade de Medicina de Ribeirão Preto (FMRP), Departamento de Bioquímica e Imunologia, Avenida Bandeirantes, 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Caroline V Gonçalves
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Stéfano P M Calado
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Denisar P Dos Santos
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Igor P R Muniz
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| | - Robson A A DA Silva
- Universidade Federal da Bahia (UFBA), Instituto Multidisciplinar em Saúde (IMS), Campus Anísio Teixeira (CAT), Rua Hormindo Barros, 58, 45029-094 Vitória da Conquista, BA, Brazil
| |
Collapse
|
5
|
Albuquerque VDQ, Soares MJC, Matos MNC, Cavalcante RMB, Guerrero JAP, Soares Rodrigues TH, Gomes GA, de Medeiros Guedes RF, Castelo-Branco DDSCM, Goes da Silva IN, Carneiro VA. Anti-Staphylococcal Activity of Cinnamomum zeylanicum Essential Oil against Planktonic and Biofilm Cells Isolated from Canine Otological Infections. Antibiotics (Basel) 2021; 11:antibiotics11010004. [PMID: 35052881 PMCID: PMC8773145 DOI: 10.3390/antibiotics11010004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 11/30/2021] [Accepted: 12/07/2021] [Indexed: 11/23/2022] Open
Abstract
The aim of this study was to evaluate the phytochemical profile of Cinnamomum zeylanicum essential oil (CZEO) and their antimicrobial and antibiofilm activity against Staphylococcus strains isolated from canine otitis. First, the CZEO chemical composition was determined by gas chromatography-mass spectrometry (CG-MS). External otitis samples collected from dogs were submitted to staphylococcal isolation, followed by MALDI-TOF mass spectrometry identification. The antimicrobial action was tested against the isolates using the disk-diffusion and microdilution methods. The antibiofilm activity was evaluated by CZEO-based concentrations, subMIC for biofilm formation and supraMIC against preformed biofilm, quantified by crystal violet (CV) staining and CFU counting. The chemical analysis revealed that (E)-cinnamaldehyde, eugenol and (E)-cinnamyl acetate were the main compounds in the CZEO, representing 77.42, 8.17 and 4.50%, respectively. Two strains of three different species, S. saprophyticus, S. schleiferi and S. pseudintermedius, were identified. The disk-diffusion test showed an inhibitory zone diameter, ranging from 34.0 to 49.5 mm, while the MIC and MBC values were around 500 and 1000 µg/mL. SubMIC demonstrated an inhibition on biofilm formation against 4 out the 6 strains tested. On mature biofilm, the CZEO-based supraMIC groups had slightly change on biomass, however, the biofilm cell viability decreased the CFU in 3 magnitude orders.
Collapse
Affiliation(s)
- Vinicius de Queiroz Albuquerque
- Department of Veterinary Sciences, State University of Ceará—Itaperi Campus, Fortaleza 60714-903, Brazil; (V.d.Q.A.); (I.N.G.d.S.)
| | - Maria Janeila Carvalho Soares
- Center for Bioprospecting and Applied Molecular Experimentation (NUBEM), University Center INTA-UNINTA, Sobral 62050-100, Brazil;
| | - Maria Nágila Carneiro Matos
- Laboratory of Biofilms and Antimicrobial Agents (LaBAM), Federal University of Ceará, Sobral 62048-280, Brazil; (M.N.C.M.); (R.M.B.C.); (J.A.P.G.)
| | - Rafaela Mesquita Bastos Cavalcante
- Laboratory of Biofilms and Antimicrobial Agents (LaBAM), Federal University of Ceará, Sobral 62048-280, Brazil; (M.N.C.M.); (R.M.B.C.); (J.A.P.G.)
| | - Jesús Alberto Pérez Guerrero
- Laboratory of Biofilms and Antimicrobial Agents (LaBAM), Federal University of Ceará, Sobral 62048-280, Brazil; (M.N.C.M.); (R.M.B.C.); (J.A.P.G.)
| | | | - Geovany Amorim Gomes
- Center of Exact Science and Technology, State University of Acaraú Valley, Sobral 62040-370, Brazil; (T.H.S.R.); (G.A.G.)
| | - Rodrigo Fonseca de Medeiros Guedes
- Group of Applied Medical Microbiology, Microbiology Department, Federal University of Ceará, Fortaleza 60430-160, Brazil; (R.F.d.M.G.); (D.d.S.C.M.C.-B.)
| | | | - Isaac Neto Goes da Silva
- Department of Veterinary Sciences, State University of Ceará—Itaperi Campus, Fortaleza 60714-903, Brazil; (V.d.Q.A.); (I.N.G.d.S.)
| | - Victor Alves Carneiro
- Center for Bioprospecting and Applied Molecular Experimentation (NUBEM), University Center INTA-UNINTA, Sobral 62050-100, Brazil;
- Laboratory of Biofilms and Antimicrobial Agents (LaBAM), Federal University of Ceará, Sobral 62048-280, Brazil; (M.N.C.M.); (R.M.B.C.); (J.A.P.G.)
- Correspondence:
| |
Collapse
|
6
|
Qiu L, Wang C, Lan M, Guo Q, Du X, Zhou S, Cui P, Hong T, Jiang P, Wang J, Xia J. Antibacterial Photodynamic Gold Nanoparticles for Skin Infection. ACS APPLIED BIO MATERIALS 2021; 4:3124-3132. [PMID: 35014400 DOI: 10.1021/acsabm.0c01505] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Damage or injury to the skin creates wounds that are vulnerable to bacterial infection, which in turn retards the process of skin regeneration and wound healing. In patients with severe burns and those with chronic diseases, such as diabetes, skin infection by multidrug-resistant bacteria can be lethal. Therefore, a broad-spectrum therapy to effectively eradicate bacterial infection through a mechanism different from that of antibiotics is much sought after. We successfully synthesized antibacterial photodynamic gold nanoparticles (AP-AuNPs), which are self-assembled nanocomposites of an antibacterial photodynamic peptide and poly(ethylene glycol) (PEG)-stabilized AuNPs. The AP-AuNPs exhibited aqueous and light stability, a satisfactory generation of reactive oxygen species (ROS), and a remarkable antibacterial effect toward both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli upon light irradiation. Moreover, the synthesized nanocomposites significantly inhibited bacterial growth and biofilm formation in vitro. Photodynamic antibacterial treatment accelerated the wound-healing rate in S. aureus infections, mimicking staphylococcal skin infections. Using a combination of the bactericidal effect of a peptide, the photodynamic effect of a photosensitizer, and the multivalency clustering on AuNPs for maximal antibacterial effect under light irradiation, we synthesized AP-AuNPs as a wound-dressing nanomaterial in skin infections to promote wound healing. Our findings indicate a promising strategy in the management of bacterial infections resulting from damaged skin tissue, an aspect that has not been fully explored by our peers.
Collapse
Affiliation(s)
- Lin Qiu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Cheng Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Min Lan
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Qianqian Guo
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xuancheng Du
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Shuwen Zhou
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Pengfei Cui
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Tingting Hong
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Pengju Jiang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jianhao Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jiang Xia
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| |
Collapse
|
7
|
Bünsow D, Tantawy E, Ostermeier T, Bähre H, Garbe A, Larsen J, Winstel V. Methicillin-resistant Staphylococcus pseudintermedius synthesizes deoxyadenosine to cause persistent infection. Virulence 2021; 12:989-1002. [PMID: 33779509 PMCID: PMC8018352 DOI: 10.1080/21505594.2021.1903691] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Methicillin-resistant Staphylococcus pseudintermedius (MRSP) is an emerging zoonotic pathogen of canine origin that causes an array of fatal diseases, including bacteremia and endocarditis. Despite large-scale genome sequencing projects have gained substantial insights into the genomic landscape of MRSP, current knowledge on virulence determinants that contribute to S. pseudintermedius pathogenesis during human or canine infection is very limited. Using a panel of genetically engineered MRSP variants and a mouse abscess model, we here identified the major secreted nuclease of S. pseudintermedius designated NucB and adenosine synthase A (AdsA) as two synergistically acting enzymes required for MRSP pathogenesis. Similar to Staphylococcus aureus, S. pseudintermedius requires nuclease secretion along with the activity of AdsA to degrade mammalian DNA for subsequent biosynthesis of cytotoxic deoxyadenosine. In this manner, S. pseudintermedius selectively kills macrophages during abscess formation thereby antagonizing crucial host immune cell responses. Ultimately, bioinformatics analyses revealed that NucB and AdsA are widespread in the global S. pseudintermedius population. Together, these data suggest that S. pseudintermedius deploys the canonical Nuc/AdsA pathway to persist during invasive disease and may aid in the development of new therapeutic strategies to combat infections caused by MRSP.
Collapse
Affiliation(s)
- Dorothea Bünsow
- Research Group Pathogenesis of Bacterial Infections; TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Eshraq Tantawy
- Research Group Pathogenesis of Bacterial Infections; TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Tjorven Ostermeier
- Research Group Pathogenesis of Bacterial Infections; TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Heike Bähre
- Research Core Unit Metabolomics, Hannover Medical School, Hannover, Germany
| | - Annette Garbe
- Research Core Unit Metabolomics, Hannover Medical School, Hannover, Germany
| | - Jesper Larsen
- Department of Bacteria, Parasites, and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Volker Winstel
- Research Group Pathogenesis of Bacterial Infections; TWINCORE, Centre for Experimental and Clinical Infection Research, a Joint Venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany.,Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| |
Collapse
|
8
|
Virulence and Antimicrobial Resistance in Canine Staphylococcus spp. Isolates. Microorganisms 2021; 9:microorganisms9030515. [PMID: 33801518 PMCID: PMC7998746 DOI: 10.3390/microorganisms9030515] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/12/2021] [Accepted: 02/26/2021] [Indexed: 11/24/2022] Open
Abstract
Dogs are reservoirs of different Staphylococcus species, but at the same time, they could develop several clinical forms caused by these bacteria. The aim of the present investigation was to characterize 50 clinical Staphylococcus isolates cultured from sick dogs. Bacterial species determination, hemolysins, protease, lipase, gelatinase, slime, and biofilm production, presence of virulence genes (lukS/F-PV, eta, etb, tsst, icaA, and icaD), methicillin resistance, and antimicrobial resistance were investigated. Most isolates (52%) were Staphylococcus pseudointermedius, but 20% and 8% belonged to Staphylococcusxylosus and Staphylococcus chromogenes, respectively. Gelatinase, biofilm, and slime production were very common characters among the investigated strains with 80%, 86%, and 76% positive isolates, respectively. Virulence genes were detected in a very small number of the tested strains. A percentage of 14% of isolates were mecA-positive and phenotypically-resistant to methicillin. Multi-drug resistance was detected in 76% of tested staphylococci; in particular, high levels of resistance were detected for ampicillin, amoxicillin, clindamycin, and erythromycin. In conclusion, although staphylococci are considered to be opportunistic bacteria, the obtained data showed that dogs may be infected by Staphylococcus strains with important virulence characteristics and a high antimicrobial resistance.
Collapse
|
9
|
Reddersen K, Greber KE, Korona-Glowniak I, Wiegand C. The Short Lipopeptides (C 10) 2-KKKK-NH 2 and (C 12) 2-KKKK-NH 2 Protect HaCaT Keratinocytes from Bacterial Damage Caused by Staphylococcus aureus Infection in a Co-Culture Model. Antibiotics (Basel) 2020; 9:antibiotics9120879. [PMID: 33302597 PMCID: PMC7764661 DOI: 10.3390/antibiotics9120879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/07/2020] [Accepted: 12/07/2020] [Indexed: 11/16/2022] Open
Abstract
The search for new antimicrobial strategies is of major importance since there is a growing resistance of both bacteria and fungi to existing antimicrobials. Lipopeptides are promising and potent antimicrobial compounds. For translation into clinically useful molecules, effectiveness of peptide treatment against human infections must be proved in complex in vitro wound models. The aim of this study was to examine if the synthesized short lipopeptides (C10)2-KKKK-NH2 and (C12)2-KKKK-NH2 can protect HaCaT keratinocytes from bacterial damage caused by Staphylococcus aureus infection in a coculture model. After 1 h, 24 h, and 48 h incubation, cellular ATP level and release of the cytotoxicity marker LDH as well as the proinflammatory cytokines interleukin-6 and interleukin-1α were measured. Infection of the keratinocytes resulted in strong bacterial damage of HaCaT cells along with low cellular ATP levels and high release of LDH, IL-6, and IL-1α after 24 h and 48 h. Incubation of the infected human keratinocytes with (C10)2-KKKK-NH2 and (C12)2-KKKK-NH2 resulted in protection of the keratinocytes from bacterial damage caused by Staphylococcus aureus infection with ATP, LDH, IL-6, and IL-1α levels comparable to the untreated control. Hence, both synthesized lipopeptides are promising candidates with high therapeutic potential in dermatology for the treatment of topical infections.
Collapse
Affiliation(s)
- Kirsten Reddersen
- Klinik für Hautkrankheiten, Universitätsklinikum Jena, 07743 Jena, Germany;
- Correspondence: ; Tel.: +49-3641-932-8879
| | - Katarzyna E. Greber
- Physical Chemistry Department, Faculty of Pharmacy, Medical University of Gdansk, 80-416 Gdansk, Poland;
| | - Izabela Korona-Glowniak
- Department of Pharmaceutical Microbiology, Medical University of Lublin, 20-093 Lublin, Poland;
| | - Cornelia Wiegand
- Klinik für Hautkrankheiten, Universitätsklinikum Jena, 07743 Jena, Germany;
| |
Collapse
|
10
|
Identification and Characterization of Staphylococcus delphini Internalization Pathway in Nonprofessional Phagocytic Cells. Infect Immun 2020; 88:IAI.00002-20. [PMID: 32094259 DOI: 10.1128/iai.00002-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 02/19/2020] [Indexed: 12/20/2022] Open
Abstract
The intracellular lifestyle of bacteria is widely acknowledged to be an important mechanism in chronic and recurring infection. Among the Staphylococcus genus, only Staphylococcus aureus and Staphylococcus pseudintermedius have been clearly identified as intracellular in nonprofessional phagocytic cells (NPPCs), for which the mechanism is mainly fibronectin-binding dependent. Here, we used bioinformatics tools to search for possible new fibronectin-binding proteins (FnBP-like) in other Staphylococcus species. We found a protein in Staphylococcus delphini called Staphylococcus delphini surface protein Y (SdsY). This protein shares 68% identity with the Staphylococcus pseudintermedius surface protein D (SpsD), 36% identity with S. aureus FnBPA, and 39% identity with S. aureus FnBPB. The SdsY protein possesses the typical structure of FnBP-like proteins, including an N-terminal signal sequence, an A domain, a characteristic repeated pattern, and an LPXTG cell wall anchor motif. The level of adhesion to immobilized fibronectin was significantly higher in all S. delphini strains tested than in the fibronectin-binding-deficient S. aureus DU5883 strain. By using a model of human osteoblast infection, the level of internalization of all strains tested was significantly higher than with the invasive-incompetent S. aureus DU5883. These findings were confirmed by phenotype restoration after transformation of DU5883 by a plasmid expression vector encoding the SdsY repeats. Additionally, using fibronectin-depleted serum and murine osteoblast cell lines deficient for the β1 integrin, the involvement of fibronectin and β1 integrin was demonstrated in S. delphini internalization. The present study demonstrates that additional staphylococcal species are able to invade NPPCs and proposes a method to identify FnBP-like proteins.
Collapse
|
11
|
Lei X, Qiu L, Lan M, Du X, Zhou S, Cui P, Zheng R, Jiang P, Wang J, Xia J. Antibacterial photodynamic peptides for staphylococcal skin infection. Biomater Sci 2020; 8:6695-6702. [DOI: 10.1039/d0bm01467b] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A multicomponent system centered on antibacterial photodynamic peptides and supported by a regenerative gelatin–collagen (Gel–Col) hydrogel.
Collapse
Affiliation(s)
- Xiaoling Lei
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Lin Qiu
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Min Lan
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Xuancheng Du
- Institute of Advanced Interdisciplinary Science
- School of Physics
- Shandong University
- Jinan 250100
- China
| | - Shuwen Zhou
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Pengfei Cui
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Ronghui Zheng
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Pengju Jiang
- School of Pharmacy
- Changzhou University
- Changzhou
- China
| | - Jianhao Wang
- School of Pharmacy
- Changzhou University
- Changzhou
- China
- Changzhou Le Sun Pharmaceuticals Co
| | - Jiang Xia
- Department of Chemistry
- the Chinese University of Hong Kong
- Shatin
- China
| |
Collapse
|
12
|
Reddersen K, Wiegand C, Elsner P, Hipler UC. Three-dimensional human skin model infected with Staphylococcus aureus as a tool for evaluation of bioactivity and biocompatibility of antiseptics. Int J Antimicrob Agents 2019; 54:283-291. [PMID: 31279155 DOI: 10.1016/j.ijantimicag.2019.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 06/28/2019] [Indexed: 01/13/2023]
Abstract
In the light of pandemic spreads of multi-drug-resistant micro-organisms, alternative antimicrobial strategies to the use of antibiotics are the focus of research attention. As a prerequisite for medical application, the aim of this study was to develop a three-dimensional full skin infection model to evaluate the bioactivity and biocompatibility of antiseptics in application-relevant concentrations. A three-dimensional (3D) full skin model consisting of collagen-embedded fibroblasts as dermis and a fully differentiated epidermis built from keratinocytes was infected with Staphylococcus aureus. Infected skin models were treated for 24 h with the antiseptics polihexanide, octenidine dihydrochloride, chlorhexidine digluconate and povidone-iodine. Infection resulted in detrimental effects, a strong immune response with increased secretion of lactate dehydrogenase and pro-inflammatory cytokines, and increased gene expression of pro-inflammatory cytokines and antimicrobial peptides after 24 h. Application of antiseptics protected the skin models from damage due to S. aureus infection while demonstrating good biocompatibility. The best ratio of bioactivity to biocompatibility was observed for polihexanide. Polihexanide also enhanced the innate immune response by increasing the gene expression levels of antimicrobial peptides such as human β-defensin 2, human β-defensin 3, psoriasin and ribonuclease 7. The developed model provides an excellent tool to investigate the response of human cells to microbial infections in a complex 3D structure. Furthermore, the infection model is appropriate for evaluation of bioactivity and biocompatibility of antiseptics. As such, the model presented in this study is a promising approach to evaluate the mechanisms and effectiveness of new antimicrobial strategies.
Collapse
Affiliation(s)
| | - Cornelia Wiegand
- Department of Dermatology, University Hospital Jena, Jena, Germany
| | - Peter Elsner
- Department of Dermatology, University Hospital Jena, Jena, Germany
| | | |
Collapse
|
13
|
A Review of Immunotherapeutic Strategies in Canine Malignant Melanoma. Vet Sci 2019; 6:vetsci6010015. [PMID: 30759787 PMCID: PMC6466282 DOI: 10.3390/vetsci6010015] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/06/2019] [Accepted: 02/08/2019] [Indexed: 12/13/2022] Open
Abstract
In dogs, melanomas are relatively common tumors and the most common form of oral malignancy. Biological behavior is highly variable, usually aggressive, and frequently metastatic, with reported survival times of three months for oral or mucosal melanomas in advanced disease stages. Classical clinical management remains challenging; thus, novel and more efficacious treatment strategies are needed. Evidence-based medicine supports the role of the immune system to treat neoplastic diseases. Besides, immunotherapy offers the possibility of a precise medicinal approach to treat cancer. In recent years, multiple immunotherapeutic strategies have been developed, and are now recognized as a pillar of treatment. In addition, dogs represent a good model for translational medicine purposes. This review will cover the most relevant immunotherapeutic strategies for the treatment of canine malignant melanoma, divided among five different categories, namely, monoclonal antibodies, nonspecific immunotherapy activated by bacteria, vaccines, gene therapy, and lymphokine-activated killer cell therapy.
Collapse
|