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Huang YC, Chen CJ, Kuo AJ, Hwang KR, Chien CC, Lee CY, Wu TH, Ko WC, Hseuh PR. Dissemination of methicillin-resistant Staphylococcus aureus sequence type 8 (USA300) in Taiwan. J Hosp Infect 2024:S0195-6701(24)00173-7. [PMID: 38782057 DOI: 10.1016/j.jhin.2024.04.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 04/23/2024] [Accepted: 04/26/2024] [Indexed: 05/25/2024]
Abstract
BACKGROUND In Taiwan, sequence type (ST) 239 and ST59 were two major clones among methicillin-resistant Staphylococcus aureus (MRSA) clinical isolates in the past two decades. USA300 (ST8) prevailed in Americas but not in outside areas. Recently USA300 (ST8) emerged and were increasingly identified in Taiwan; we thus conducted an islandwide study to explore the role of USA300 among MRSA isolates. METHODS 100 MRSA bloodstream isolates identified in 2020, respectively, from each of the six participating hospitals in Taiwan were collected and characterized. First ten ST8 isolates from each hospital were further analyzed by whole genome sequencing (WGS). RESULTS Of the 590 confirmed MRSA isolates, a total of 22 pulsotypes and 21 STs were identified. The strain of pulsotype AI/ ST8 was the most common lineage identified, accounting for 187 isolates (31.7%) and dominating in 5 of 6 hospitals, followed by pulsotype A/ ST239 (14.7%), pulsotype C/ ST59 (13.9%) and pulsotype D/ ST59 (9.2%). Of the 187 pulsotype AI/ ST8 isolates, 184 isolates were characterized as USA300 and clustered in three major sub-pulsotypes, accounting for 78%. Ninety percent of the 60 ST8 isolates for WGS were clustered in three major clades. CONCLUSIONS In 2020, USA300 became the most common clone of MRSA in Taiwan, accounting for > 30% of MRSA bloodstream isolates islanwide. Most of USA300 isolates circulating in Taiwan might be imported at multiple occasions and evolved into at least 3 successful local clades. MRSA USA300 had successfully established its role in Taiwan, an area outside of Americas.
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Affiliation(s)
- Yhu-Chering Huang
- Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan; College of Medicine, Chang Gung University, Taoyuan City, Taiwan.
| | - Chih-Jung Chen
- Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan; College of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - An-Jing Kuo
- College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Laboratory Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
| | - Kuo-Rue Hwang
- Department of Laboratory Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan; Department of Laboratory Medicine, Chang Gung Memorial Hospital at Keelung, Keelung City, Taiwan
| | - Chun-Chih Chien
- Department of Laboratory Medicine, Chang Gung Memorial Hospital at Kaohsiung, Kaohsiung City, Taiwan
| | - Chun-Yi Lee
- Department of Pediatrics, Chang Bing Show Chwan Memorial Hospital, Changhua County, Taiwan
| | - Tsung-Hua Wu
- Department of Pediatrics, Chang Hua Show Chwan Memorial Hospital, Changhua, Taiwan
| | - Wen-Chien Ko
- Department of Medicine, National Cheng Kung University Hospital, Tainan City, Taiwan
| | - Po-Ren Hseuh
- Department of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan; Departments of Laboratory Medicine and Internal Medicine, China Medical University Hospital, and School of Medicine, China Medical University, Taichung, Taiwan
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2
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Chandler DJ, Walker SL. HIV and skin infections. Clin Dermatol 2024; 42:155-168. [PMID: 38142787 DOI: 10.1016/j.clindermatol.2023.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
HIV infection alters the skin microbiome and predisposes to a wide range of cutaneous infections, from atypical presentations of common skin infections to severe disseminated infections involving the skin that are AIDS-defining illnesses. Bacterial infection of the skin, most commonly caused by Staphylococcus aureus, occurs frequently and can result in bacteremia. Nontuberculous mycobacterial infections that are usually localized to the skin may disseminate, and guidance on the treatment of these infections is limited. Herpes simplex can be severe, and less common presentations such as herpetic sycosis and herpes vegetans have been reported. Severe herpes zoster, including disseminated infection, requires intravenous antiviral treatment. Viral warts can be particularly difficult to treat, and in atypical or treatment-resistant cases a biopsy should be considered. Superficial candidosis occurs very commonly in people living with HIV, and antifungal resistance is an increasing problem in non-albicans Candida species. Systemic infections carry a poor prognosis. In tropical settings the endemic mycoses including histoplasmosis are a problem for people living with HIV, and opportunistic infections can affect those with advanced HIV in all parts of the world. Most cutaneous infections can develop or worsen as a result of immune reconstitution in the weeks to months after starting antiretroviral therapy. Direct microscopic examination of clinical material can facilitate rapid diagnosis and treatment initiation, although culture is important to provide microbiological confirmation and guide treatment.
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Affiliation(s)
- David J Chandler
- Dermatology Department, University Hospitals Sussex NHS Foundation Trust, Brighton, UK; Department of Global Health & Infection, Brighton and Sussex Medical School, Brighton, UK.
| | - Stephen L Walker
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK; Hospital for Tropical Diseases and Department of Dermatology, University College London Hospitals NHS Foundation Trust, London, UK
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3
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Jhelum H, Čerina D, Harbort CJ, Lindner A, Hanitsch LG, Leistner R, Schröder JT, von Bernuth H, Stegemann MS, Schürmann M, Zychlinsky A, Krüger R, Marsman G. Panton-Valentine leukocidin-induced neutrophil extracellular traps lack antimicrobial activity and are readily induced in patients with recurrent PVL + -Staphylococcus aureus infections. J Leukoc Biol 2024; 115:222-234. [PMID: 37943843 DOI: 10.1093/jleuko/qiad137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 10/04/2023] [Accepted: 10/09/2023] [Indexed: 11/12/2023] Open
Abstract
Staphylococcus aureus strains that produce the toxin Panton-Valentine leukocidin (PVL-SA) frequently cause recurrent skin and soft tissue infections. PVL binds to and kills human neutrophils, resulting in the formation of neutrophil extracellular traps (NETs), but the pathomechanism has not been extensively studied. Furthermore, it is unclear why some individuals colonized with PVL-SA experience recurring infections whereas others are asymptomatic. We thus aimed to (1) investigate how PVL exerts its pathogenicity on neutrophils and (2) identify factors that could help to explain the predisposition of patients with recurring infections. We provide genetic and pharmacological evidence that PVL-induced NET formation is independent of NADPH oxidase and reactive oxygen species production. Moreover, through NET proteome analysis we identified that the protein content of PVL-induced NETs is different from NETs induced by mitogen or the microbial toxin nigericin. The abundance of the proteins cathelicidin (CAMP), elastase (NE), and proteinase 3 (PRTN3) was lower on PVL-induced NETs, and as such they were unable to kill S. aureus. Furthermore, we found that neutrophils from affected patients express higher levels of CD45, one of the PVL receptors, and are more susceptible to be killed at a low PVL concentration than control neutrophils. Neutrophils from patients that experience recurring PVL-positive infections may thus be more sensitive to PVL-induced NET formation, which might impair their ability to combat the infection.
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Affiliation(s)
- Hina Jhelum
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117, Berlin, Germany
| | - Dora Čerina
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117, Berlin, Germany
| | - C J Harbort
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117, Berlin, Germany
| | - Andreas Lindner
- Institute of Tropical Medicine and International Health, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Leif Gunnar Hanitsch
- Department of Medical Immunology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Rasmus Leistner
- Institute of Hygiene and Environmental Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Jennyver-Tabea Schröder
- Department of Pediatric Surgery, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Horst von Bernuth
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
- Department of Immunology, Labor Berlin GmbH, Sylter Straße 2, 13353, Berlin, Germany
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
- Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Miriam Songa Stegemann
- Department of Infectious Diseases and Respiratory Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Mariana Schürmann
- Department of Infectious Diseases and Respiratory Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Arturo Zychlinsky
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117, Berlin, Germany
| | - Renate Krüger
- Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany
| | - Gerben Marsman
- Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117, Berlin, Germany
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De La Mora L, Pitart C, Morata L, Ugarte A, Martinez-Rebollar M, De Lazzari E, Vergara A, Bosch J, Roca I, Piquet M, Rodriguez A, Laguno M, Ambrosioni J, Torres B, González-Cordón A, Inciarte A, Foncillas A, Riera J, Fuertes I, Chivite I, Martinez E, Blanco JL, Soriano A, Mallolas J. Increasing of New CA-MRSA Infections Detected in people living with HIV Who Engage in Chemsex in Barcelona: An Ambispective Study. Infect Dis Ther 2023; 12:2179-2189. [PMID: 37491688 PMCID: PMC10505111 DOI: 10.1007/s40121-023-00846-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 07/03/2023] [Indexed: 07/27/2023] Open
Abstract
INTRODUCTION There are no data on community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) infections in the context of the chemsex phenomenon. This study aimed to characterize CA-MRSA-related infections in a cohort of people living with HIV (PLWH) who engage in chemsex. METHODS At the Hospital Clinic of Barcelona, from February 2018 to January 2022, we analyzed CA-MRSA infections diagnosed in a cohort of PLWH who engage in chemsex. Epidemiological, behavioral and clinical variables were assessed. Mass spectrometry identification and antimicrobial susceptibility testing were performed on MRSA isolates. Pulse field electrophoresis was used to assess the clonality of the MRSA strains. The presence of Panton-Valentine leukocidin was also investigated. RESULTS Among the cohort of 299 participants who engage in chemsex, 25 (8%) with CA-MRSA infections were identified, 9 at baseline and 16 with incident cases; the cumulative incidence was 5.5% (95% CI: 3.2%, 8.8%). The most common drugs were methamphetamine (96%) and GHB/GBL (92%). Poly-consumption and slamming were reported by 32% and 46%, respectively. CA-MRSA was isolated from the infection sites of 20 participants, and CA-MRSA colonization was confirmed in the remaining 5 persons. Seventy-one percent had used antibiotics in the previous year. All participants presented with skin and soft tissue infections, 28% required hospitalization, and 48% had recurrence. Of the 23 MRSA isolates further studied, 19 (82,6%) belonged to the same clone. Panton-Valentine leukocidin was detected in all isolates. CONCLUSION PLWH who engage in chemsex may present with CA-MRSA infections. Clinical suspicion and microbiological diagnosis are required to provide adequate therapy, and CA-MRSA prevention interventions should be designed.
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Affiliation(s)
- Lorena De La Mora
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Cristina Pitart
- Department of Clinical Microbiology, ISGlobal, Hospital Clínic-University of Barcelona, CIBERINF, Barcelona, Spain
| | - Laura Morata
- Department of Infectious Diseases, Hospital Clinic, IDIBAPS, CIBERINF, University of Barcelona, Barcelona, Spain
| | - Ainoa Ugarte
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - María Martinez-Rebollar
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain.
| | - Elisa De Lazzari
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Andrea Vergara
- Department of Clinical Microbiology, ISGlobal, Hospital Clínic-University of Barcelona, CIBERINF, Barcelona, Spain
| | - Jordi Bosch
- Department of Clinical Microbiology, ISGlobal, Hospital Clínic-University of Barcelona, CIBERINF, Barcelona, Spain
| | - Ignasi Roca
- Department of Clinical Microbiology, ISGlobal, Hospital Clínic-University of Barcelona, CIBERINF, Barcelona, Spain
| | - Maria Piquet
- Department of Clinical Microbiology, ISGlobal, Hospital Clínic-University of Barcelona, CIBERINF, Barcelona, Spain
| | - Ana Rodriguez
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Montserrat Laguno
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Juan Ambrosioni
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Berta Torres
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Ana González-Cordón
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Alexy Inciarte
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Alberto Foncillas
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Josep Riera
- Dermatology Service, Hospital Clinic, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Irene Fuertes
- Dermatology Service, Hospital Clinic, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Iván Chivite
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Esteban Martinez
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - José L Blanco
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
| | - Alex Soriano
- Department of Infectious Diseases, Hospital Clinic, IDIBAPS, CIBERINF, University of Barcelona, Barcelona, Spain
| | - Josep Mallolas
- HIV Unit, Infectious Diseases Service, Hospital Clinic, IDIBAPS, AIDS and HIV Research Group, University of Barcelona, Villarroel 170, 08036, Barcelona, Spain
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5
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Shinohara K, Uehara Y, Teruya K, Sasaki T, Baba T, Nakaminami H, Kananizadeh P, Morimoto Y, Kikuchi Y, Oka S. Emergence of community-associated methicillin-resistant Staphylococcus aureus ΨUSA300 among Japanese people with HIV, resulted from stepwise mutations in 2010s. Sci Rep 2023; 13:8322. [PMID: 37221358 DOI: 10.1038/s41598-023-35171-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 05/14/2023] [Indexed: 05/25/2023] Open
Abstract
Although infection with the methicillin-resistant Staphylococcus aureus (MRSA) clone USA300 is extremely rare in Japan, the uniquely evolved clone ΨUSA300 has been reported in Japan. An outbreak of a distinct USA300 clone was recently reported in an HIV/AIDS referral hospital in Tokyo. The present study investigated the evolutionary origin and genetic diversity of USA300-related clones causing regional outbreaks among people living with HIV (PLWHIV) in Tokyo. MRSA isolates collected from PLWHIV in an HIV/AIDS referral center in Tokyo were subjected to whole-genome sequencing and their genetic features were compared with those of previously described USA300 MRSA genomes. Of the 28 MRSAs isolated in 2016-2019, 23 (82.1%) were identified as USA300, with 22 (95.6%) of the latter identified as ΨUSA300. Although the genomic structure of ΨUSA300 was identical to the structures of reference USA300 strains, one clade (cluster A) was found to have acquired 29 previously identified lineage-specific mutations in a stepwise manner. The estimated divergence dates of ΨUSA300 and Cluster A were 2009 and 2012, respectively. These findings suggested that the ΨUSA300 clone had spread among PLWHIVs in Tokyo in the early 2010s, with stepwise acquisition of lineage-specific nonsynonymous mutations.
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Affiliation(s)
- Koh Shinohara
- AIDS Clinical Center, The National Center for Global Health and Medicine, Tokyo, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yuki Uehara
- Department of Microbiology, Faculty of Medicine, Juntendo University, Tokyo, Japan.
- Department of Infectious Diseases, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Katsuji Teruya
- AIDS Clinical Center, The National Center for Global Health and Medicine, Tokyo, Japan
| | - Takashi Sasaki
- Animal Research Center, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tadashi Baba
- Graduate School of Nursing, Seisen Jogakuin College, Nagano, Japan
| | - Hidemasa Nakaminami
- Department of Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Pegah Kananizadeh
- Department of Microbiology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Yuh Morimoto
- Faculty of Health Science, Juntendo University, Tokyo, Japan
| | - Yoshimi Kikuchi
- AIDS Clinical Center, The National Center for Global Health and Medicine, Tokyo, Japan
| | - Shinichi Oka
- AIDS Clinical Center, The National Center for Global Health and Medicine, Tokyo, Japan
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6
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Znaidia M, de Souza-Angelo Y, Létoffé S, Staropoli I, Grzelak L, Ghigo JM, Schwartz O, Casartelli N. Exposure to Secreted Bacterial Factors Promotes HIV-1 Replication in CD4 + T Cells. Microbiol Spectr 2023; 11:e0431322. [PMID: 36853052 PMCID: PMC10100953 DOI: 10.1128/spectrum.04313-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 02/08/2023] [Indexed: 03/01/2023] Open
Abstract
Microbial translocation is associated with systemic immune activation in HIV-1 disease. Circulating T cells can encounter microbial products in the bloodstream and lymph nodes, where viral replication takes place. The mechanisms by which bacteria contribute to HIV-associated pathogenesis are not completely deciphered. Here, we examined how bacteria may impact T cell function and viral replication. We established cocultures between a panel of live bacteria and uninfected or HIV-1-infected activated peripheral blood CD4-positive (CD4+) T cells. We show that some bacteria, such as Escherichia coli and Acinetobacter baumannii, sustain lymphocyte activation and enhance HIV-1 replication. Bacteria secrete soluble factors that upregulate CD25 and ICAM-1 cell surface levels and activate NF-κB nuclear translocation. Our data also demonstrate that CD25 polarizes at the virological synapse, suggesting a previously unappreciated role of CD25 during viral replication. These findings highlight how interactions between bacterial factors and T cells may promote T cell activation and HIV-1 replication. IMPORTANCE People living with HIV suffer from chronic immune activation despite effective antiretroviral therapy. Early after infection, HIV-1 actively replicates in the gut, causing the breakage of the intestinal epithelial barrier and microbial translocation. Microbial translocation and chronic immune activation have been proven linked; however, gaps in our knowledge on how bacteria contribute to the development of HIV-related diseases remain. Whether T cells in the peripheral blood react to bacterial products and how this affects viral replication are unknown. We show that some bacteria enriched in people living with HIV activate T cells and favor HIV-1's spread. Bacteria release soluble factors that cause the overexpression of cellular molecules related to their activation state. T cells overexpressing these molecules also replicate HIV-1 more efficiently. These results help us learn more about how HIV-1, T cells, and bacteria interact with each other, as well as the mechanisms behind chronic immune activation.
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Affiliation(s)
- M. Znaidia
- Institut Pasteur, Université Paris-Cité, UMR CNRS 3569, Virus and Immunity Unit, Paris, France
| | - Y. de Souza-Angelo
- Institut Pasteur, Université Paris-Cité, UMR CNRS 3569, Virus and Immunity Unit, Paris, France
| | - S. Létoffé
- Institut Pasteur, Université Paris-Cité, UMR CNRS 6047, Genetics of Biofilms Laboratory, Paris, France
| | - I. Staropoli
- Institut Pasteur, Université Paris-Cité, UMR CNRS 3569, Virus and Immunity Unit, Paris, France
| | - L. Grzelak
- Institut Pasteur, Université Paris-Cité, UMR CNRS 3569, Virus and Immunity Unit, Paris, France
| | - J. M. Ghigo
- Institut Pasteur, Université Paris-Cité, UMR CNRS 6047, Genetics of Biofilms Laboratory, Paris, France
| | - O. Schwartz
- Institut Pasteur, Université Paris-Cité, UMR CNRS 3569, Virus and Immunity Unit, Paris, France
- Vaccine Research Institute, Créteil, France
| | - N. Casartelli
- Institut Pasteur, Université Paris-Cité, UMR CNRS 3569, Virus and Immunity Unit, Paris, France
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7
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Mpox associated with Panton-Valentin leucocidin-producing methicillin-resistant Staphylococcus aureus among people with HIV. J Infect Chemother 2023; 29:710-712. [PMID: 37011835 PMCID: PMC10066592 DOI: 10.1016/j.jiac.2023.03.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/04/2023]
Abstract
We report three cases of mpox (disease caused by the monkeypox virus) that developed in people with HIV co-infected with Panton-Valentin leucocidin-producing methicillin-resistant Staphylococcus aureus (PVL-MRSA), diagnosed in mid-February 2023. All three cases had preserved HIV immune status, and their mpox was mild and resolved without antiviral medications, but the trigger for their visit was the presence and history of skin and soft tissue infections. Our cases suggest that mpox is already prevalent among sexually active MSM in Tokyo, Japan. PVL-MRSA has been extremely rare in the general population of Japan, but several literatures reported widespread prevalence of PVL-MRSA among sexually active MSM-HIV. Mpox will become prevalent in the future in a population of sexually active MSM at high risk for PVL-MRSA infection, requiring an understanding of the interaction and pathogenesis of the two diseases.
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8
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Ote H, Ito H, Akira T, Sugai M, Hisatsune J, Uehara Y, Oba Y. A fatal case of disseminated infection caused by community-associated methicillin-resistant Staphylococcus aureus USA300 clone. Jpn J Infect Dis 2023. [PMID: 37005273 DOI: 10.7883/yoken.jjid.2022.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) USA300 is a representative community-associated MRSA (CA-MRSA) clone around the world. We herein report a patient of USA300 clone infection who could not be saved. A 25-year-old man who had sex with men presented with fever lasting one week and skin lesions on the buttocks. Computed tomography imaging showed the findings of multiple nodules and consolidations, especially in the peripheral lung fields, right iliac vein thrombosis, and pyogenic myositis of bilateral medial thighs. Blood cultures revealed MRSA bacteremia. The conditions of the patient deteriorated rapidly, complicated by acute respiratory distress syndrome and infective endocarditis, and was finally intubated on the 6th hospital day and died on the 9th day. Multilocus sequence typing of this patient's MRSA strain was sequence type 8, had a staphylococcal cassette chromosome of mec type IVa, Panton-Valentine leukocidin gene, and the arginine catabolic mobile element, indicating it was USA300 clone. Past literatures suggest that CA-MRSA skin lesions presenting with furuncle or carbuncle on the lower body are at a high risk for severe disease. The patient's background and appearance as well as the location of the skin lesions should be critical for the early diagnosis of severe CA-MRSA infection.
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Affiliation(s)
- Hiroyuki Ote
- Department of General Internal Medicine and Infectious Diseases, Osaka General Medical Center, Japan
| | - Hideyuki Ito
- Department of General Internal Medicine and Infectious Diseases, Osaka General Medical Center, Japan
| | - Taroh Akira
- Department of General Internal Medicine and Infectious Diseases, Osaka General Medical Center, Japan
| | - Motoyuki Sugai
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Japan
| | - Junzo Hisatsune
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Japan
| | - Yuki Uehara
- Department of Infectious Diseases, Fujita Health University School of Medicine, Japan
| | - Yuichiro Oba
- Department of General Internal Medicine and Infectious Diseases, Osaka General Medical Center, Japan
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9
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Complete Genome Sequencing of a Community-Associated Methicillin-Resistant Staphylococcus aureus ψUSA300 Strain JICS127, a Uniquely Evolved USA300 Lineage in Japan. Microbiol Resour Announc 2022; 11:e0071722. [PMID: 35969061 PMCID: PMC9476983 DOI: 10.1128/mra.00717-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A ψUSA300 clone of MRSA, a derivative of USA300, is uniquely found in Japan and has 12-bp deletion on
ccrB2
in type IVa staphylococcal cassette chromosome
mec
element. We hereby present the complete genome of ψUSA300 strain JICS127.
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10
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Sugawara-Mikami M, Kaneko H, Sasaki H, Sagawa N, Kambara T, Nakaminami H. Clinical features and antimicrobial treatment of skin infections caused by Panton-Valentine leukocidin-positive methicillin-resistant Staphylococcus aureus. J Dermatol 2022; 49:1338-1342. [PMID: 36029001 DOI: 10.1111/1346-8138.16548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/25/2022] [Accepted: 07/29/2022] [Indexed: 11/27/2022]
Abstract
Skin infections caused by Panton-Valentine leukocidin (PVL)-positive methicillin-resistant Staphylococcus aureus (MRSA), especially the USA300 clone, have been increasing in Japan. To prevent an epidemic of PVL-positive MRSA, rapid diagnosis and effective antimicrobial therapy are essential. However, the clinical features of, and antimicrobial efficacy against, these skin infections are not well understood in Japan. Here, we report 10 cases of skin infections caused by PVL-positive MRSA that presented over a two-year period in our clinic. Genetic analyses revealed that 90% of the PVL-positive MRSA strains were identified as USA300 and its related clones. Notably, 70% of the patients had atopic dermatitis (AD) as an underlying disease. Average durations of antimicrobial therapy for AD patients (10.6 weeks) were 2.9-fold longer than those for non-AD patients (3.7 weeks). However, all cases were improved by a long-term course of fosfomycin, minocycline, doxycycline, and/or rifampicin. Our data suggest that AD may be an important risk factor for intractable skin infections caused by PVL-positive MRSA.
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Affiliation(s)
- Mariko Sugawara-Mikami
- West Yokohama Sugawara Dermatology Clinic, Yokohama, Japan.,Department of Clinical Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hiroshi Kaneko
- Department of Clinical Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hiroaki Sasaki
- Department of Infectious Diseases, Yokohama Municipal Citizen's Hospital, Yokohama, Japan
| | - Nobuko Sagawa
- Department of Dermatology, Yokohama Municipal Citizen's Hospital, Yokohama, Japan
| | - Takeshi Kambara
- Department of Dermatology, Yokohama Municipal Citizen's Hospital, Yokohama, Japan
| | - Hidemasa Nakaminami
- Department of Clinical Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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Rahman S, Das AK. Integrated Multi-omics, Virtual Screening and Molecular Docking Analysis of Methicillin-Resistant Staphylococcus aureus USA300 for the Identification of Potential Therapeutic Targets: An In-Silico Approach. Int J Pept Res Ther 2021; 27:2735-2755. [PMID: 34548853 PMCID: PMC8446483 DOI: 10.1007/s10989-021-10287-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2021] [Indexed: 11/28/2022]
Abstract
Staphylococcus aureus infection is a leading cause of mortality and morbidity in community, hospital and live-stock sectors, especially with the widespread emergence of methicillin-resistant S. aureus (MRSA) strains. To identify new drug molecules to treat MRSA patients, we have undertaken to search essential proteins that are indispensable for their survival but non-homologous to human host proteins. The current study utilizes a subtractive genome and proteome approach to screen the possible therapeutic targets against S. aureus USA300. Bacterial essential genes are obtained from the DEG database and are compared to avoid cross-reactivity with human host genes. In silico analysis shows 198 proteins that may be considered as therapeutic candidates. Depending on their sub-cellular localization, proteins are grouped as either vaccine or drug targets or both. Extracellular proteins such as cell division proteins (Q2FZ91, Q2FZ95), penicillin-binding proteins (Q2FZ94, Q2FYI0) of the bacterial cell wall, phosphoglucomutase (Q2FE11) and lipoteichoic acid synthase (Q2FIS2) are considered as vaccine targets, and their epitopes have been mapped. Altogether, 53 drug targets are identified, which have shown similarity with the drug targets available in the DrugBank database. Predicted drug targets belong to the common metabolic pathways of MRSA, such as fatty acid biosynthesis, folate biosynthesis, peptidoglycan biosynthesis, ribosome, etc. Protein-protein interaction analysis emphasizing peptidoglycan biosynthesis reveals the connection between penicillin-binding proteins, mur-family proteins and FemXAB proteins. In this study, staphylococcal FemA protein (P0A0A5) is subjected to structure-based virtual screening for the drug repurposing approach. There are 20 residues missing in the crystal structure of FemA, and 12 of these residues are located at the catalytic site. The missing residues are modelled, and stereochemistry is checked. FDA approved drugs available in the DrugBank database have been used in virtual screening with FemA in search of potential repurposed molecules. This approach provides us with 10 drugs that may be used in the treatment of methicillin-resistant staphylococcal mediated diseases. AutoDock 4.2 is used for in silico screening and shows a comparable inhibition constant (Ki) for all 10 FDA-approved drugs towards FemA. Most of these drugs are used in the treatment of various cancers, migraines and leukaemia. Protein-drug interaction analysis shows that the drugs mostly interact with hydrophobic residues of FemA. Moreover, Tyr328 and Lys383 contribute largely to hydrogen bondings during interactions. All interacting amino acids that bind to the drugs are part of the active site cavity of FemA. Supplementary Information The online version contains supplementary material available at 10.1007/s10989-021-10287-9.
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Affiliation(s)
- Shakilur Rahman
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302 India
| | - Amit Kumar Das
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302 India
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12
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Staphylococcal Infections: Host and Pathogenic Factors. Microorganisms 2021; 9:microorganisms9051080. [PMID: 34069873 PMCID: PMC8157358 DOI: 10.3390/microorganisms9051080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 12/12/2022] Open
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13
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Popovich KJ. Using Genomic Sequencing to Delineate Community Networks of Methicillin-Resistant Staphylococcus aureus Transmission Among Men Who Have Sex With Men. J Infect Dis 2021; 223:543-546. [PMID: 33057661 PMCID: PMC7904285 DOI: 10.1093/infdis/jiaa652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 11/13/2022] Open
Affiliation(s)
- Kyle J Popovich
- Rush University Medical Center, Chicago, Illinois, USA
- Cook County Health, Chicago, Illinois, USA
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