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Ito A, Nanjo Y, Kajiwara C, Shiozawa A, Urabe N, Homma S, Kishi K, Yamada K, Ishii Y, Tateda K. Intrinsic clarithromycin heteroresistance in Mycobacterium avium. J Infect Chemother 2024:S1341-321X(24)00051-5. [PMID: 38369123 DOI: 10.1016/j.jiac.2024.02.016] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/05/2024] [Accepted: 02/14/2024] [Indexed: 02/20/2024]
Abstract
BACKGROUND Mycobacterium avium is associated with pulmonary disease in otherwise healthy adults. Several clarithromycin-refractory cases have been reported, including some cases caused by clarithromycin-susceptible strains. OBJECTIVES To characterize the reason for the discrepancy between clinical response and antibiotic susceptibility results. METHODS We conducted population analysis of clarithromycin-tolerant and heteroresistant subpopulations of M. avium cultured in vitro and in homogenates of infected lungs of mice. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined for 28 M. avium and two M. kansasii strains. Mice were intranasally infected with M. avium and treated with or without clarithromycin (100 mg/kg) thrice weekly. They were sacrificed on day 35 and the bacteria in lung homogenates were tested for clarithromycin resistance. Population analysis assays were performed based on colony growth on plates containing two-fold dilutions of clarithromycin. RESULTS The MBC/MIC ratios were ≥8 in all 28 strains of M. avium tested. In the population analysis assay, several colonies were observed on the plates containing clarithromycin concentrations above the MIC (2-64 mg/L). No growth of M. kansasii colonies was observed on the plates containing clarithromycin concentrations ≥2 mg/L. M. avium in the homogenates of infected lungs showed clearer clarithromycin-resistant subpopulations than in vitro, regardless of clarithromycin exposure. CONCLUSION M. avium shows intrinsic heterogeneous resistance (heteroresistance) to clarithromycin. This may explain the observed discrepancies between clarithromycin susceptibility testing results and clinical response to clarithromycin treatment. Further studies are needed to confirm a link between heteroresistance and clinical outcomes.
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Affiliation(s)
- Ai Ito
- Department of Respiratory Medicine, Toho University Omori Medical Center, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan; Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Yuta Nanjo
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan; Department of Respiratory Medicine, Juntendo University School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Ayako Shiozawa
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Naohisa Urabe
- Department of Respiratory Medicine, Toho University Omori Medical Center, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Sakae Homma
- Department of Respiratory Medicine, Toho University Omori Medical Center, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Kazuma Kishi
- Department of Respiratory Medicine, Toho University Omori Medical Center, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Kageto Yamada
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
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Sato T, Yamaguchi T, Aoki K, Kajiwara C, Kimura S, Maeda T, Yoshizawa S, Sasaki M, Murakami H, Hisatsune J, Sugai M, Ishii Y, Tateda K, Urita Y. Whole-genome sequencing analysis of molecular epidemiology and silent transmissions causing meticillin-resistant Staphylococcus aureus bloodstream infections in a university hospital. J Hosp Infect 2023; 139:141-149. [PMID: 37301229 DOI: 10.1016/j.jhin.2023.05.014] [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: 03/03/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND The emergence of novel genomic-type clones, such as community-associated meticillin-resistant Staphylococcus aureus (MRSA) and livestock-associated MRSA, and their invasion into hospitals have become major concerns worldwide; however, little information is available regarding the prevalence of MRSA in Japan. Whole-genome sequencing (WGS) has been conducted to analyse various pathogens worldwide. Therefore, it is important to establish a genome database of clinical MRSA isolates available in Japan. AIM A molecular epidemiological analysis of MRSA strains isolated from bloodstream-infected patients in a Japanese university hospital was conducted using WGS and single-nucleotide polymorphism (SNP) analysis. Additionally, through a review of patients' clinical characteristics, the effectiveness of SNP analysis as a tool for detecting silent nosocomial transmission that may be missed by other methods was evaluated in diverse settings and various time points of detection. METHODS Polymerase-chain-reaction-based staphylococcal cassette chromosome mec (SCCmec) typing was performed using 135 isolates obtained between 2014 and 2018, and WGS was performed using 88 isolates obtained between 2015 and 2017. FINDINGS SCCmec type II strains, prevalent in 2014, became rare in 2018, whereas the prevalence of SCCmec type IV strains increased from 18.75% to 83.87% of the population, and became the dominant clones. Clonal complex (CC) 5 CC8 and CC1 were detected between 2015 and 2017, with CC1 being dominant. In 88 cases, SNP analyses revealed nosocomial transmissions among 20 patients which involved highly homologous strains. CONCLUSIONS Routine monitoring of MRSA by whole-genome analysis is effective not only for gaining knowledge regarding molecular epidemiology, but also for detecting silent nosocomial transmission.
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Affiliation(s)
- T Sato
- Department of General Medicine and Emergency Care, Toho University Graduate School of Medicine, Tokyo, Japan; Department of General Medicine and Emergency Care, Toho University Omori Medical Centre, Tokyo, Japan.
| | - T Yamaguchi
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.
| | - K Aoki
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - C Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - S Kimura
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - T Maeda
- Department of General Medicine and Emergency Care, Toho University Omori Medical Centre, Tokyo, Japan
| | - S Yoshizawa
- Department of Clinical Laboratories, Toho University Omori Medical Centre, Tokyo, Japan
| | - M Sasaki
- Department of Clinical Laboratories, Toho University Omori Medical Centre, Tokyo, Japan
| | - H Murakami
- Department of Clinical Laboratories, Toho University Omori Medical Centre, Tokyo, Japan
| | - J Hisatsune
- National Institute of Infectious Diseases, Tokyo, Japan
| | - M Sugai
- National Institute of Infectious Diseases, Tokyo, Japan
| | - Y Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - K Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan; Department of Clinical Laboratories, Toho University Omori Medical Centre, Tokyo, Japan
| | - Y Urita
- Department of General Medicine and Emergency Care, Toho University Omori Medical Centre, Tokyo, Japan
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Kajiwara C, Shiozawa A, Urabe N, Yamaguchi T, Kimura S, Akasaka Y, Ishii Y, Tateda K. Apoptosis Inhibitor of Macrophages Contributes to the Chronicity of Mycobacterium avium Infection by Promoting Foamy Macrophage Formation. J Immunol 2023; 210:431-441. [PMID: 36602769 DOI: 10.4049/jimmunol.2200306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 12/07/2022] [Indexed: 01/06/2023]
Abstract
In Mycobacterium avium infections, macrophages play a critical role in the host defense response. Apoptosis inhibitor of macrophage (AIM), also known as CD5L, may represent a novel supportive therapy against various diseases, including metabolic syndrome and infectious diseases. The mechanisms of AIM include modulating lipid metabolism in macrophages and other host cells. We investigated the role of AIM in M. avium infections in vitro and in vivo. In a mouse model of M. avium pneumonia, foamy macrophages were induced 6 wk after infection. The bacteria localized in these macrophages. Flow cytometric analysis also confirmed that the percentage of CD11chighMHCclassIIhigh interstitial and alveolar macrophages, a cell surface marker defined as foamy macrophages, increased significantly after infection. AIM in alveolar lavage fluid and serum gradually increased after infection. Administration of recombinant AIM significantly increased the number of bacteria in the lungs of mice, accompanied by the induction of inflammatory cytokine and iNOS expression. In mouse bone marrow-derived macrophages, the mRNA expression of AIM after M. avium infection and the amount of AIM in the supernatant increased prior to the increase in intracellular bacteria. Infected cells treated with anti-AIM Abs had fewer bacteria and a higher percentage of apoptosis-positive cells than infected cells treated with isotype control Abs. Finally, AIM in the sera of patients with M. avium-pulmonary disease was measured and was significantly higher than in healthy volunteers. This suggests that AIM production is enhanced in M. avium-infected macrophages, increasing macrophage resistance to apoptosis and providing a possible site for bacterial growth.
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Affiliation(s)
- Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo, Japan
| | - Ayako Shiozawa
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo, Japan
| | - Naohisa Urabe
- Department of Respiratory Medicine, Toho University Omori Medical Center, Tokyo, Japan
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo, Japan
| | - Soichiro Kimura
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Shonan University of Medical Sciences, Kanagawa, Japan; and
| | - Yoshikiyo Akasaka
- Department of Diagnostic Pathology, Saiseikai Yokohamashi Tobu Hospital, Kanagawa, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo, Japan
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4
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Mizuno Y, Konishi S, Imai H, Fujimori E, Kojima N, Kajiwara C, Yoshinaga J. Telomere length and urinary 8-hydroxy-2'-deoxyguanosine and essential trace element concentrations in female Japanese university students. J Environ Sci Health A Tox Hazard Subst Environ Eng 2021; 56:1328-1334. [PMID: 34672915 DOI: 10.1080/10934529.2021.1991741] [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: 01/08/2021] [Revised: 10/04/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Telomere length is thought to be a biomarker of biological aging. This study examined whether telomere length was associated with urinary concentrations of 8-hydroxy-2'-deoxyguanosine (8-OHdG), a biomarker of oxidative stress, and antioxidative trace elements in 73 female Japanese university students (age: 19.2 ± 0.7 years). We quantified 8-OHdG and selenium in urine by liquid chromatography-mass spectrometry and inductively coupled plasma-mass spectrometry, respectively. Telomere length and urinary concentrations of other essential trace elements (molybdenum, cobalt, and chromium) that were previously measured in the same study participants, were used in this study. We used multiple linear regression analysis to examine the associations of telomere length with urinary 8-OHdG and essential trace element concentrations (covariates: urinary cotinine concentration, age, BMI, and drinking status). The geometric means (geometric standard deviation) of 8-OHdG and selenium were 3.4 (1.5) and 31 (1.3) µg/g creatinine, respectively. Telomere length was not associated with urinary 8-OHdG concentration, but was negatively associated with urinary selenium concentration. In conclusion, telomere length was not associated with urinary 8-OHdG concentration in the young women in this study. Longitudinal studies should be conducted to clarify the association between telomere shortening rate and oxidative stress level.
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Affiliation(s)
- Yuki Mizuno
- Department of Human Ecology, School of International Health, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Shoko Konishi
- Department of Human Ecology, School of International Health, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Hideki Imai
- Faculty of Nursing, Ishikawa Prefectural Nursing University, Ishikawa, Japan
- Tokyo Healthcare University, Tokyo, Japan
| | - Eiji Fujimori
- National Environmental Research and Training Institute, Saitama, Japan
| | | | | | - Jun Yoshinaga
- Faculty of Life Sciences, Toyo University, Gunma, Japan
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McKee HK, Kajiwara C, Yamaguchi T, Ishii Y, Shimizu N, Ohara A, Tateda K. Clostridioides difficile toxins enhanced the in vitro production of CXC chemokine ligand 2 and tumor necrosis factor-α via Toll-like receptors in macrophages. J Med Microbiol 2021; 70. [PMID: 33830910 DOI: 10.1099/jmm.0.001342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Introduction. Clostridioides difficile infection (CDI) causes toxin-mediated enteropathy, such as antibiotic-associated diarrhoea and pseudomembranous colitis. Rho-glucosylating toxin A (TcdA) and toxin B (TcdB) have been clearly implicated in pathogenesis, whereas the virulence of binary toxin (CDT) is still debated.Hypothesis statement. We hypothesized that CDT is involved in the host immune response and plays a pivotal role in establishing virulence by modulating pro-inflammatory cytokine production; this is achieved through the integral Toll-like receptor (TLR) signalling pathways.Aim. The aim of the present study was to determine whether and how CDT impacts macrophages compared to TcdA or TcdB by examining the induction of CXC chemokine ligand 2 (CXCL2) and tumour necrosis factor-α (TNF-α), both of which are crucial in mediating local and systematic inflammatory responses.Methodology. RAW264.7 cells or transfected human embryonic kidney (HEK) 293 T cells were incubated with TcdA, TcdB, or CDT. In some experiments, a neutralizing antibody against TLR2 or TLR4, or myeloid differentiation 88 inhibitory peptide were added. The amount of CXCL2 and TNF-α secreted was then measured.Results. In RAW264.7 macrophages, CXCL2 and TNF-α were produced via the Toll-like receptor 2 (TLR2) or Toll-like receptor 4 (TLR4) pathway in a TcdA, TcdB, or CDT dose-dependent manner. Interleukin-8 secretion was induced in TLR4/MD2/CD14-transfected, but not in TLR2-transfected, HEK 293 T cells following TcdB or CDT exposure.Conclusion. Our results showed that C. difficile toxins, including CDT, enhanced macrophage-mediated CXCL2 and TNF-α production via TLR2 and TLR4, indicating that CDT affects host immune responses.
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Affiliation(s)
- Hiroe Konishi McKee
- Department of Pediatrics, Toho University Ohashi Medical Center, Tokyo 153-8515, Japan.,Department of Pediatrics, Toho University Graduate School of Medicine, Tokyo 143-8540, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Norikazu Shimizu
- Department of Pediatrics, Toho University Ohashi Medical Center, Tokyo 153-8515, Japan.,Department of Pediatrics, Toho University Graduate School of Medicine, Tokyo 143-8540, Japan
| | - Akira Ohara
- Department of Pediatrics, Toho University Graduate School of Medicine, Tokyo 143-8540, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo 143-8540, Japan
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6
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Hamada M, Yamaguchi T, Sato A, Ono D, Aoki K, Kajiwara C, Kimura S, Maeda T, Sasaki M, Murakami H, Ishii Y, Tateda K. Increased Incidence and Plasma-Biofilm Formation Ability of SCC mec Type IV Methicillin-Resistant Staphylococcus aureus (MRSA) Isolated From Patients With Bacteremia. Front Cell Infect Microbiol 2021; 11:602833. [PMID: 33842382 PMCID: PMC8032974 DOI: 10.3389/fcimb.2021.602833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 02/12/2021] [Indexed: 12/15/2022] Open
Abstract
In Japan, Staphylococcal cassette chromosome mec (SCCmec) type IV methicillin-resistant Staphylococcus aureus (MRSA) is an increasingly prominent cause of bacteremia, but the virulence of most of these strains is unclear. We aimed to investigate the relationship between the molecular characteristics and the ability to form biofilms in the presence of blood plasma (plasma-biofilms) of MRSA strains isolated from bloodstream infections. In this study, the molecular characteristics and biofilms of MRSA strains isolated from blood cultures between 2015 and 2017 were analyzed by PCR-based assays, crystal violet staining, and confocal reflection microscopy methods. Among the 90 MRSA isolates, the detection rate of SCCmec type II clones decreased from 60.7 to 20.6%. The SCCmec type IV clone replaced the SCCmec type II clone as the dominant clone, with a detection rate increasing from 32.1 to 73.5%. The plasma-biofilm formation ability of the SCCmec type IV clone was higher than the SCCmec type II clone and even higher in strains harboring the cna or arcA genes. Plasma-biofilms, mainly composed of proteins, were formed quickly and strongly. Our study demonstrated the increased plasma-biofilm formation ability of SCCmec type IV strains.
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Affiliation(s)
- Masakaze Hamada
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Ayami Sato
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.,Department of Surgery, Toho University Sakura Medical Center, Chiba, Japan
| | - Daisuke Ono
- Department of Infectious Diseases and Infection Control, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - Kotaro Aoki
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Tadashi Maeda
- Department of General Medicine and Emergency Care, Toho University Omori Medical Center, Tokyo, Japan
| | - Masakazu Sasaki
- Department of Clinical Laboratories, Toho University Omori Medical Center, Tokyo, Japan
| | - Hinako Murakami
- Department of Clinical Laboratories, Toho University Omori Medical Center, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.,Department of Clinical Laboratories, Toho University Omori Medical Center, Tokyo, Japan
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7
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Nakakubo S, Kimura S, Mimura K, Kajiwara C, Ishii Y, Konno S, Tateda K. Traditional Japanese Herbal Medicine Hochu-Ekki-to Promotes Pneumococcal Colonization Clearance via Macrophage Activation and Interleukin 17A Production in Mice. Front Cell Infect Microbiol 2020; 10:569158. [PMID: 33194807 PMCID: PMC7649813 DOI: 10.3389/fcimb.2020.569158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/22/2020] [Indexed: 12/15/2022] Open
Abstract
Streptococcus pneumoniae may colonize the nasopharynx, and as pneumococcal colonization causes invasive diseases and the subsequent transmission, reducing bacterial burden in the nasal cavity is critical. Hochu-ekki-to (TJ-41) is a traditional Japanese herbal medicine that exerts immunomodulatory effects in host cells. In this study, we investigated the potency of TJ-41 in modulating pneumococcal colonization clearance by activating host immunity. Mice, intranasally inoculated with pneumococci, were treated orally with TJ-41. During colonization, TJ-41 treatment significantly reduced pneumococcal burden and increased macrophage population in the nasopharynx. Furthermore, interleukin 17A production was significantly enhanced after TJ-41 treatment. In vitro experiment using nasal-derived cells revealed that pneumococcal antigen exposure upregulated the transcription of interleukin 17A in the TJ-41-treated group compared with that in the control group. Macrophages activated by killed bacteria were significantly increased in the presence of TJ-41 in an interleukin 17A-dependent manner. Moreover, TJ-41 enhanced phagocytosis, inhibited bacterial growth, and improved the antigen-presenting capacity of macrophages. Our results demonstrate that TJ-41 accelerates the clearance of pneumococcal nasopharyngeal colonization via macrophage activation. Subsequent production of interleukin 17A provides an additional benefit to effector cells.
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Affiliation(s)
- Sho Nakakubo
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan.,Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Kazuyuki Mimura
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Satoshi Konno
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Hokkaido, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
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8
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Shiozawa A, Kajiwara C, Ishii Y, Tateda K. N-acetyl-cysteine mediates protection against Mycobacterium avium through induction of human β-defensin-2 in a mouse lung infection model. Microbes Infect 2020; 22:567-575. [PMID: 32882411 DOI: 10.1016/j.micinf.2020.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 08/18/2020] [Accepted: 08/24/2020] [Indexed: 02/08/2023]
Abstract
Mycobacterium avium complex is a causative organism for refractory diseases. In this study, we examined the effects of N-acetyl-cysteine on M. avium infection in vitro and in vivo. N-acetyl-cysteine treatment suppressed the growth of M. avium in A549 cells in a concentration-dependent manner. This effect was related to the induction of the antibacterial peptide human β-defensin-2. In a mouse model, N-acetyl-cysteine treatment significantly reduced the number of bacteria in the lungs and induced murine β-defensin-3. In interleukin-17-deficient mice, the effects of N-acetyl-cysteine disappeared, indicating that these mechanisms may be mediated by interleukin-17. Moreover, an additional reduction in bacterial load was observed in mice administered N-acetyl-cysteine in combination with clarithromycin. Our findings demonstrate the potent antimycobacterial effects of N-acetyl-cysteine against M. avium by inducing antimicrobial peptide, suggesting that N-acetyl-cysteine may have applications as an alternative to classical treatment regimens.
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Affiliation(s)
- Ayako Shiozawa
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan.
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan
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9
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Kajiwara C, Kimura S, Tanaka Y, Akasaka Y, Ishii Y, Tateda K. Tissue Damage Caused by Impaired Phagocytosis of Dead Cells: A Previously Unrecognized Adverse Effect Contributing to the Pathogenesis of γδ T Cells in Legionella Pneumonia. Immunohorizons 2020; 4:402-414. [PMID: 32665299 DOI: 10.4049/immunohorizons.2000054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 06/30/2020] [Indexed: 11/19/2022] Open
Abstract
IL-17 plays a critical role in the immunological control of various infectious diseases; its function has been investigated in the removal of both extracellular and intracellular bacteria. Our group previously revealed the importance of IL-17 in neutrophil migration following Legionella infection by using IL-17AF knockout mice; however, aside from neutrophil infiltration, alternative causes for the reduced survival of these mice have not been characterized. In this study, we found that γδ T cells in IL-17AF knockout mice were markedly increased and produced the cytotoxic substances granzyme B and perforin. Moreover, the elimination of γδ T cells from these mice, via an anti-TCRδ Ab, caused a substantial reduction in the level of lactate dehydrogenase in bronchoalveolar lavage fluid, indicating that γδ T cells contribute to lung tissue damage. Moreover, although cells lysed by cytotoxic substances are typically eliminated by phagocytic cells, in IL-17AF knockout mice, lung homeostasis was not maintained because of a decrease in phagocytic cells that impaired the clearance of dead cells. Our results indicate that increased γδ T cells in IL-17AF knockout mice help eliminate Legionella by releasing cytotoxic substances and lysing infected cells; however, this results in tissue damage due to insufficient removal of dead cells by phagocytic cells. This study enhances our understanding of the protective response against Legionella and provides insights into γδ T cell-mediated protective immunity against various infectious diseases.
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Affiliation(s)
- Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan;
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Yuriko Tanaka
- Department of Molecular Immunology, Toho University School of Medicine, Tokyo 143-8540, Japan; and
| | - Yoshikiyo Akasaka
- Unit of Regenerative Diseases Research, Division of Research Promotion and Development, Advanced Medical Research Center, Toho University Graduate School of Medicine, Tokyo 143-8540, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
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10
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Mimura K, Kimura S, Kajiwara C, Nakakubo S, Schaller MA, Ishii Y, Standiford TJ, Kunkel SL, Tateda K. Pneumococcal conjugate vaccine modulates macrophage-mediated innate immunity in pneumonia caused by Streptococcus pneumoniae following influenza. Microbes Infect 2020; 22:312-321. [PMID: 31958572 DOI: 10.1016/j.micinf.2019.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/09/2019] [Accepted: 12/10/2019] [Indexed: 11/30/2022]
Abstract
Pneumococcal conjugate vaccination (PCV) may prevent influenza-related pneumonia, including Streptococcus pneumoniae pneumonia. To investigate PCV efficacy against secondary pneumococcal pneumonia following influenza, PCV was administered intramuscularly 2 and 5 weeks before S. pneumoniae serotype-3 colonization of murine nasopharynges followed by intranasal challenge with a sublethal dose of influenza A virus. Bacterial and viral loads, including innate immune responses were compared across conditions. PCV vaccination improved the survival of mice with secondary pneumococcal pneumonia and significantly reduced the pulmonary bacterial burden. Increased monocyte/macrophage influx into the lungs, alleviated loss of alveolar macrophages and decreased neutrophil influx into the lungs occurred in PCV-treated mice irrespective of pneumococcal colonization. Higher monocyte chemoattractant protein 1 levels and lower levels of CXCL1, interferon-γ, interleukin-17A, and IL-10, were detected in PCV-treated mice. Additionally, PCV treatment activated the macrophage intracellular killing of S. pneumoniae. Collectively, PCV potentially modulates the host's innate immunity and specific antibodies induction. Macrophage-related innate immunity should be further explored to elucidate the efficacy and mechanisms of PCV versus influenza-related life-threatening diseases.
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Affiliation(s)
- Kazuyuki Mimura
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, 143-8540, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, 143-8540, Japan.
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, 143-8540, Japan
| | - Sho Nakakubo
- First Department of Internal Medicine, Hokkaido University Hospital, Hokkaido, 060-8638, Japan
| | - Matthew A Schaller
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, 143-8540, Japan
| | - Theodore J Standiford
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Steven L Kunkel
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, 143-8540, Japan
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11
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Ono D, Yamaguchi T, Hamada M, Sonoda S, Sato A, Aoki K, Kajiwara C, Kimura S, Fujisaki M, Tojo H, Sasaki M, Murakami H, Kato K, Ishii Y, Tateda K. Analysis of synergy between beta-lactams and anti-methicillin-resistant Staphylococcus aureus agents from the standpoint of strain characteristics and binding action. J Infect Chemother 2019; 25:273-280. [PMID: 30713034 DOI: 10.1016/j.jiac.2018.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 12/20/2018] [Indexed: 11/17/2022]
Abstract
In light of the increasing number of clinical cases resistant to traditional monotherapies and the lack of novel antimicrobial agents, combination therapy is an appealing solution for the treatment of methicillin-resistant Staphylococcus aureus (MRSA) infections. Here, we evaluated the efficacy of anti-MRSA agents, such as vancomycin (VAN), daptomycin (DAP), and linezolid (LZD), in conjunction with 13 beta-lactams and non-beta-lactams. We assessed the in vitro activities of the various combinations against 40 MRSA strains based on the maximum synergistic effect (MSE), an index calculated from the MIC change with a combination agent. Nearly all the anti-MRSA agents, which were combined with beta-lactams as well as VAN and DAP, showed a synergistic effect with arbekacin. VAN also exhibited varying degrees of synergy depending on the type of beta-lactam, whereas DAP and LZD showed similar synergy with different beta-lactams. These effects were confirmed by antibiotic kill curves, except for the apparent interaction between LZD and beta-lactams. The MSE results were analyzed according to strain characteristics including susceptibility to combination agents, staphylococcal cassette chromosome mec type, and presence of the blaZ gene; however, no obvious correlations were observed. In a fluorescence binding assay, the fluorescence intensity of boron-dipyrromethene (BODIPY)-VAN decreased, whereas that of BODIPY-DAP increased in combination with a beta-lactam agent. These findings suggest that beta-lactam combinations are promising treatment options for MRSA infections and that the type of beta-lactam combined with VAN is important for the synergistic effect.
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Affiliation(s)
- Daisuke Ono
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Masakaze Hamada
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Shiro Sonoda
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Ayami Sato
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan; Department of Surgery, Toho University Sakura Medical Center, Chiba, Japan.
| | - Kotaro Aoki
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Soichiro Kimura
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Momoko Fujisaki
- Research and Development Headquarters, Eiken Chemical Co., Ltd., Tokyo, Japan.
| | - Hiroyuki Tojo
- Research and Development Headquarters, Eiken Chemical Co., Ltd., Tokyo, Japan.
| | - Masakazu Sasaki
- Department of Clinical Laboratories, Toho University Omori Medical Center, Tokyo, Japan.
| | - Hinako Murakami
- Department of Clinical Laboratories, Toho University Omori Medical Center, Tokyo, Japan.
| | - Keisuke Kato
- Department of Organic Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan.
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Disease, Toho University School of Medicine, Tokyo, Japan.
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12
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Shiozawa A, Kajiwara C, Ishii Y, Tateda K. 813. Combination of N-Acetyl-Cysteine With Clarithromycin Against Mycobacterium avium Infection. Open Forum Infect Dis 2018. [PMCID: PMC6254830 DOI: 10.1093/ofid/ofy210.820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Background N-Acetyl-cysteine (NAC) is widely used in patients with chronic pulmonary diseases. In previous studies, its antimicrobacterial and antimycobacterial effects have been reported. Among its effect in Mycobacteria, it has been mainly studied in Mycobacterium tuberculosis. Here, we examined whether NAC has antibiotic activity against M. avium. Methods The antimycobacterial effect of NAC was assessed in JCM 15430 M. avium strain infected A-549 (human lung epithelial cells) and MH-S (mouse alveolar macrophages). These cells were infected with M. avium at multiplicity of infection of 10 for 1 hours, washed and then cultivated for 5 days. Bacterial uptake was evaluated at 0 days and 5 days of cultivation. For the NAC treatment group, 5% FBS medium with 10 mM NAC was used as culture medium. We also tested its effect in combination with clarithromycin in vivo. BALB/c mice were infected intranasally with M. avium, and were given NAC (400 mg/kg) or clarithromycin (100 mg/kg) or both by gavage daily for 6 days. On day 7 of infection, lungs were harvested and CFU, cytokines and antimicrobial peptides were measured. Results NAC treatment of M. avium-infected A-549 and MH-S resulted in a significant reduction of mycobacterial loads (P = 0.014 and P = 0.014). In vivo, NAC treatment resulted in a significant reduction of mycobacterial loads in the lungs of M. avium-infected mice (P = 0.007). When in combination with clarithromycin, we also had an additional reduction (vs. clarithromycin monotherapy; P = 0.001). Several antimicrobial peptides significantly increased when treated with NAC and clarithromycin combination therapy. Conclusion NAC exhibits potent anti-mycobacterial effects and may limit M. avium infection. In addition with clarithromycin, it showed an additive effect in reduction of mycobacterial loads. Interestingly, in our study, several antimicrobial peptides increased significantly which may be one of the possibility on how NAC is involved in antimycobacterial effects. These results indicate that NAC may be an additional option in treating M. avium-infected patients in future, along with its classical drug regimens containing clarithromycin. Disclosures All authors: No reported disclosures.
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Affiliation(s)
- Ayako Shiozawa
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
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13
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Sonoda S, Yamaguchi T, Aoki K, Ono D, Sato A, Kajiwara C, Kimura S, Akasaka Y, Ishii Y, Miyazaki Y, Inase N, Tateda K. Evidence of latent molecular diversity determining the virulence of community-associated MRSA USA300 clones in mice. Immun Inflamm Dis 2018; 6:402-412. [PMID: 30091216 PMCID: PMC6113770 DOI: 10.1002/iid3.234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/10/2018] [Accepted: 07/13/2018] [Indexed: 01/26/2023]
Abstract
Introduction The USA300 clone of community‐associated MRSA is reported to be hypervirulent and epidemic in the United States. This clone causes a variety of diseases from lethal pneumonia to mild skin infections. We hypothesized that evolutionary diversity may exist among USA300 clones, which may link virulence traits with host responses and mortality rates. Methods USA300 isolates from severe pneumonia (IP) and skin infection (IS) were characterized by pulsed‐field gel electrophoresis (PFGE) and next‐generation sequencing. Their virulence traits and host responses were compared in a lung infection model. Results The two USA300 isolates were found to be identical in genomic analysis. Robust IL‐6 production, aggregation of bacteria, and hemorrhaging were observed in IP‐infected lungs, which were associated with a higher rate of mortality than that observed with strain IS. Few neutrophils were detected in the lungs infected with strain IP, even at high bacterial loads. Massive production of α‐toxin and coagulase were evident during the early phase of IP infection, and robust gene expression of hla (α‐toxin) and lukS‐PV (Panton–Valentine leukocidin), but not coa, agrA, or rnaIII, was confirmed in vitro. Strain IP also induced strong hemolysis in red blood cells. Conclusions The present data demonstrated latent diversity in the virulence of USA300 clones. Unknown regulatory mechanisms, probably involving a host factor(s) as a trigger, may govern the virulence expression and resultant high mortality in certain sub‐clones of USA300.
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Affiliation(s)
- Shiro Sonoda
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan.,Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Kotaro Aoki
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Daisuke Ono
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Ayami Sato
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan.,Department of Surgery, Toho University Sakura Medical Center, Chiba, 285-8741, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Yoshikiyo Akasaka
- Department of Pathology, Toho University. Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Yasunari Miyazaki
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Naohiko Inase
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
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14
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Kusaka Y, Kajiwara C, Shimada S, Ishii Y, Miyazaki Y, Inase N, Standiford TJ, Tateda K. Potential Role of Gr-1+ CD8+ T Lymphocytes as a Source of Interferon-γ and M1/M2 Polarization during the Acute Phase of Murine Legionella pneumophila Pneumonia. J Innate Immun 2018; 10:328-338. [PMID: 30021216 DOI: 10.1159/000490585] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 06/01/2018] [Indexed: 01/04/2023] Open
Abstract
In this study, we analyzed interferon (IFN)-γ-producing cells and M1/M2 macrophage polarization in Legionella pneumophila pneumonia following anti-Gr-1 antibody treatment. Anti-Gr-1 treatment induced an M1-to-M2 shift of macrophage subtypes in the lungs and weakly in the peripheral blood, which was associated with increased mortality in legionella-infected mice. CD8+ T lymphocytes and natural killer cells were the dominant sources of IFN-γ in the acute phase, and anti-Gr-1 treatment reduced the number of IFN-γ-producing CD8+ T lymphocytes. In the CD3-gated population, most Gr-1-positive cells were CD8+ T lymphocytes in the lungs and lymph nodes (LNs) of infected mice. Additionally, the number of IFN-γ-producing Gr-1+ CD8+ T lymphocytes in the lungs and LNs increased 2 and 4 days after L. pneumophila infection, with anti-Gr-1 treatment attenuating these populations. Antibody staining revealed that Gr-1+ CD8+ T lymphocytes were Ly6C-positive cells rather than Ly6G, a phenotype regarded as memory type cells. Furthermore, the adoptive transfer of Gr-1+ CD8+ T lymphocytes induced increases in IFN-γ, M1 shifting and reduced bacterial number in the Legionella pneumonia model. These data identified Ly6C+ CD8+ T lymphocytes as a source of IFN-γ in innate immunity and partially associated with reduced IFN-γ production, M2 polarization, and high mortality in anti-Gr-1 antibody-treated mice with L. pneumophila pneumonia.
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Affiliation(s)
- Yu Kusaka
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.,Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Sho Shimada
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.,Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Yasunari Miyazaki
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Naohiko Inase
- Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Theodore J Standiford
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
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15
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Shibue Y, Kimura S, Kajiwara C, Iwakura Y, Yamaguchi K, Tateda K. Role of interleukin-17 in a murine community-associated methicillin-resistant Staphylococcus aureus pneumonia model. Microbes Infect 2018; 21:33-39. [PMID: 30026066 DOI: 10.1016/j.micinf.2018.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 06/20/2018] [Accepted: 06/28/2018] [Indexed: 11/30/2022]
Abstract
Interleukin (IL)-17 is a key member of the Th17 cytokines and has been reported to be involved in the pathomechanisms underlying various diseases, including infectious diseases. Infections with community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) have garnered worldwide attention, and the representative USA300 strain is known to cause pneumonia in healthy people, which can be lethal. However, little is known about the role of IL-17 in CA-MRSA pneumonia. In this study, we investigated the role of IL-17 in a CA-MRSA pneumonia animal model. Mortality was higher and occurred at an earlier stage of infection in the IL-17A-knockout mice than in the wild-type (P < 0.01) and IL-17A/F-knockout mice (P < 0.05); however, no significant difference in the intrapulmonary bacterial counts was observed among the three groups of mice. Moreover, the IL-17A-knockout group showed significantly higher levels of IL-17F and granulocyte-colony stimulating factor (G-CSF) and a significantly higher neutrophil count in the bronchoalveolar lavage fluid than the other groups. These results confirmed that G-CSF expression significantly increased, and significant neutrophilic inflammation occurred under conditions of IL-17A deficiency in the murine CA-MRSA pneumonia model.
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Affiliation(s)
- Yasushi Shibue
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, 5-21-16, Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan; First Department of Medicine, Hokkaido University School of Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, 5-21-16, Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan.
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, 5-21-16, Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Yoichiro Iwakura
- Research Institute for Biomedical Sciences, Tokyo University of Science, 2669 Yamasaki, Noda, Chiba, 278-0022, Japan
| | - Keizo Yamaguchi
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, 5-21-16, Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, 5-21-16, Omori-nishi, Ota-ku, Tokyo, 143-8540, Japan
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16
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Kajiwara C, Kusaka Y, Kimura S, Yamaguchi T, Nanjo Y, Ishii Y, Udono H, Standiford TJ, Tateda K. Metformin Mediates Protection against Legionella Pneumonia through Activation of AMPK and Mitochondrial Reactive Oxygen Species. J Immunol 2017; 200:623-631. [PMID: 29246951 DOI: 10.4049/jimmunol.1700474] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 11/06/2017] [Indexed: 12/25/2022]
Abstract
In Legionella pneumophila infection, macrophages play a critical role in the host defense response. Metformin, an oral drug for type 2 diabetes, is attracting attention as a new supportive therapy against a variety of diseases, such as cancer and infectious diseases. The novel mechanisms for metformin actions include modulation of the effector functions of macrophages and other host immune cells. In this study, we have examined the effects of metformin on L. pneumophila infection in vitro and in vivo. Metformin treatment suppressed growth of L. pneumophila in a time- and concentration-dependent fashion in bone marrow-derived macrophages, RAW cells (mouse), and U937 cells (human). Metformin induced phosphorylation of AMP-activated protein kinase (AMPK) in L. pneumophila-infected bone marrow-derived macrophages, and the AMPK inhibitor Compound C negated metformin-mediated growth suppression. Also, metformin induced mitochondrial reactive oxygen species but not phagosomal NADPH oxidase-derived reactive oxygen species. Metformin-mediated growth suppression was mitigated in the presence of the reactive oxygen species scavenger glutathione. In a murine L. pneumophila pneumonia model, metformin treatment improved survival of mice, which was associated with a significant reduction in bacterial number in the lung. Similar to in vitro observations, induction of AMPK phosphorylation and mitochondrial ROS was demonstrated in the infected lungs of mice treated with metformin. Finally, glutathione treatment abolished metformin effects on lung bacterial clearance. Collectively, these data suggest that metformin promotes mitochondrial ROS production and AMPK signaling and enhances the bactericidal activity of macrophages, which may contribute to improved survival in L. pneumophila pneumonia.
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Affiliation(s)
- Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Yu Kusaka
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan.,Department of Respiratory Medicine, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Yuta Nanjo
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan.,Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109; and
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan
| | - Heiichiro Udono
- Department of Immunology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Theodore J Standiford
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109; and
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University School of Medicine, Tokyo 143-8540, Japan;
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17
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Nakagawa T, Mori N, Kajiwara C, Kimura S, Akasaka Y, Ishii Y, Saji T, Tateda K. Endogenous IL-17 as a factor determining the severity of Clostridium difficile infection in mice. J Med Microbiol 2016; 65:821-827. [PMID: 27166143 DOI: 10.1099/jmm.0.000273] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Clostridium difficile infection (CDI) is a toxin-mediated intestinal disease. Toxin A, toxin B and binary toxin are believed to be responsible for the pathogenesis of CDI, which is characterized by massive infiltration of neutrophils at the infected intestinal mucosa. IL-17 is one of the cytokines that play critical roles in several inflammatory and immunological diseases through various actions, including promoting neutrophil recruitment. The aim of this study was to examine the role of this cytokine in CDI by employing IL-17 A and F double knockout (IL-17 KO) mice for the CDI model. We demonstrated that IL-17 KO mice were more resistant to CDI than WT mice using several factors, such as diarrhoea score, weight change and survival rate. Although the bacterial numbers of C. difficile in faeces were not different, the inflammatory mediator levels at the large intestine on day 3 post-infection were attenuated in IL-17 KO mice. Finally, we showed that infiltration of neutrophils, but not macrophages, in the large intestine was significantly decreased in IL-17 KO mice compared to WT mice. In conclusion, the data demonstrate that endogenous IL-17 may be a factor determining the severity of CDI in mice. Although the mechanism is totally unknown, IL-17-mediated inflammatory responses, such as cytokine/chemokine production and neutrophil accumulation, may be plausible targets for future investigations.
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Affiliation(s)
- Tomoaki Nakagawa
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.,Division of Pediatrics, Toho University Omori Medical Center, Tokyo, Japan
| | - Nobuaki Mori
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Yoshikiyo Akasaka
- Division of Chronic Inflammatory Diseases, Advanced Medical Research Center, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Tsutomu Saji
- Division of Pediatrics, Toho University Omori Medical Center, Tokyo, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
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18
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Kajiwara C, Kondo S, Uda S, Dai L, Ichiyanagi T, Chiba T, Ishido S, Koji T, Udono H. Spermatogenesis arrest caused by conditional deletion of Hsp90α in adult mice. Biol Open 2012; 1:977-82. [PMID: 23213375 PMCID: PMC3507171 DOI: 10.1242/bio.2012646] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 07/11/2012] [Indexed: 12/17/2022] Open
Abstract
It is controversial whether a functional androgen receptor (AR) on germ cells, including spermatogonia, is essential for their development into sperm and, thus, initiation and maintenance of spermatogenesis. It was recently shown that many spermatocytes underwent apoptosis in the testes of Hsp90α KO mice. We had generated Hsp90α KO mice independently and confirmed this phenotype. However, the important question of whether Hsp90α is required to maintain spermatogenesis in adult mice in which testicular maturation is already completed could not be addressed using these conventional KO mice. To answer this question, we generated a tamoxifen-inducible deletion mutant of Hsp90α and found that conditional deletion of Hsp90α in adult mice caused even more severe apoptosis in germ cells beyond the pachytene stage, leading to complete arrest of spermatogenesis and testicular atrophy. Importantly, immunohistochemical analysis revealed that AR expression in WT testis was more evident in spermatogonia than in spermatocytes, whereas its expression was aberrant and ectopic in Hsp90α KO testis, raising the possibility that an AR abnormality in primordial germ cells is involved in spermatogenesis arrest in the Hsp90α KO mice. Our results suggest that the AR, specifically chaperoned by Hsp90α in spermatogonia, is critical for maintenance of established spermatogenesis and for survival of spermatocytes in adult testis, in addition to setting the first wave of spermatogenesis before puberty.
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Affiliation(s)
- Chiaki Kajiwara
- Laboratories for Immunochaperones, Research Center for Allergy and Immunology (RCAI), RIKEN Yokohama Institute , Yokohama 230-0045 , Japan
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19
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Li Y, Li S, Hoshino M, Ishikawa R, Kajiwara C, Gao X, Zhao Y, Ishido S, Udono H, Wang JY. HSP90α deficiency does not affect immunoglobulin gene hypermutation and class switch but causes enhanced MHC class II antigen presentation. Int Immunol 2012; 24:751-8. [PMID: 22855849 DOI: 10.1093/intimm/dxs076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Heat shock protein 90 (HSP90) is a molecular chaperone required for efficient antigen presentation and cross-presentation. In addition, HSP90 was recently reported to interact with and stabilize the activation-induced cytidine deaminase (AID) and plays a critical role in immunoglobulin gene hypermutation and class switch recombination. In mice and humans, there are two HSP90 isoforms, HSP90α and HSP90β, but the in vivo role of each isoform remains largely unknown. Here we have analyzed humoral immune responses in HSP90α-deficient mice. We found that HSP90α deficiency did not affect AID protein expression. B cell development and maturation, as well as immunoglobulin gene hypermuation and class switch, occurred normally in HSP90α-deficient mice. However, antibody production to a T-dependent antigen was elevated in the mutant mice and this was associated with enhanced MHC class II antigen presentation to T helper cells by dendritic cells. Our results reveal a previously unidentified inhibitory role for HSP90α isoform in MHC class II antigen presentation and the humoral immune response. Along with our recent finding that HSP90α is required for antigen cross-presentation, these results suggest that HSP90α controls the balance of humoral and cellular immunity by dictating the fate of presentation of exogenous antigen.
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Affiliation(s)
- Yingqian Li
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center, Medical School of Nanjing University Nanjing 210061, China
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Mizukami S, Kajiwara C, Tanaka M, Kaisho T, Udono H. Differential MyD88/IRAK4 requirements for cross-priming and tumor rejection induced by heat shock protein 70-model antigen fusion protein. Cancer Sci 2012; 103:851-9. [PMID: 22320267 DOI: 10.1111/j.1349-7006.2012.02233.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/24/2012] [Accepted: 01/26/2012] [Indexed: 11/27/2022] Open
Abstract
Priming of CD8(+) T cells requires two signals, one produced by T-cell receptor recognition of antigen, and a second that is often provided by the innate immune response. In this context, antigens non-covalently or covalently associated with heat shock proteins (HSP) are internalized and processed in antigen-presenting cells (APC) to be presented by MHC I molecules to CD8(+) T cells, thus, signal 1 has been well characterized in this pathway of cross-presentation. Signal 2 is not fully understood, although there are reports that Toll-like receptors (TLRs) interact with HSP and activate APC. The ability of HSP to activate APC through TLRs is, however, controversial because of the possibility of endotoxin contamination. Using a variety of TLR KO mice, we present evidence that TLRs (TLR2, 3, 4, 7, and 9) and their adaptor molecules MyD88 and IRAK4 are dispensable in cross-priming by a mycobacterial HSP70-antigen (ovalbumin as a model antigen) fusion protein; in contrast, MyD88/IRAK4, but not TLRs, are required for tumor rejection induced by the same reagent. Our results indicate that HSP-mediated cross-priming uses a second signal produced by mechanisms other than TLR cascades. We hypothesize that efficient cross-priming by HSP70 alone is insufficient for tumor rejection and that MyD88/IRAK4-dependent inflammatory stimulation, which might contribute to maintenance of the initially primed effector cells, is required to eradicate tumor burden.
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Affiliation(s)
- Shusaku Mizukami
- Department of Immunology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Ichiyanagi T, Imai T, Kajiwara C, Mizukami S, Nakai A, Nakayama T, Udono H. Essential role of endogenous heat shock protein 90 of dendritic cells in antigen cross-presentation. J Immunol 2010; 185:2693-700. [PMID: 20668218 DOI: 10.4049/jimmunol.1000821] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Extracellular HSP90 associated with Ag peptides have been demonstrated to efficiently cross-prime T cells, following internalization by dendritic cells (DCs). In addition, the nature of cell-associated Ags required for cross-priming is implicated as peptides and proteins chaperoned by heat shock protein (HSP). However, the role of endogenous HSP in DCs during cross-presentation remains elusive. In this paper, we show that endogenous HSP90 is essential for cross-presentation of both soluble and cell-associated Ags in DCs. Cross-presentation of soluble OVA and OVA-loaded transporter associated with Ag processing-1-deficient cells by bone marrow-derived DCs and DC-like cell line DC2.4 was profoundly blocked by HSP90 inhibitors, whereas presentation of endogenously expressed OVA was only partially suppressed. Assays using small interfering RNA and heat shock factor-1-deficient DCs (with defective expression of HSP90alpha) revealed the pivotal role of HSP90alpha in cross-presentation. The results suggest that in addition to HSP90 in Ag donor cells, endogenous HSP90 in DCs plays an essential role during Ag cross-presentation and, moreover, points to a link between heat shock factor-1-dependent induction of HSP90alpha within DC and cytotoxic T cell immunity.
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Affiliation(s)
- Tomoko Ichiyanagi
- Laboratory for Immunochaperones, Research Center for Allergy and Immunology, RIKEN, Yokohama Institute, Tsurumi-Ku, Yokohama, Japan
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Mizukami S, Kajiwara C, Ishikawa H, Katayama I, Yui K, Udono H. Both CD4+and CD8+T cell epitopes fused to heat shock cognate protein 70 (hsc70) can function to eradicate tumors. Cancer Sci 2008; 99:1008-15. [DOI: 10.1111/j.1349-7006.2008.00788.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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