1
|
Wang F, Ting C, Riemondy KA, Douglas M, Foster K, Patel N, Kaku N, Linsalata A, Nemzek J, Varisco BM, Cohen E, Wilson JA, Riches DW, Redente EF, Toivola DM, Zhou X, Moore BB, Coulombe PA, Omary MB, Zemans RL. Regulation of epithelial transitional states in murine and human pulmonary fibrosis. J Clin Invest 2023; 133:e165612. [PMID: 37768734 PMCID: PMC10645382 DOI: 10.1172/jci165612] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 09/21/2023] [Indexed: 09/29/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive scarring disease arising from impaired regeneration of the alveolar epithelium after injury. During regeneration, type 2 alveolar epithelial cells (AEC2s) assume a transitional state that upregulates multiple keratins and ultimately differentiate into AEC1s. In IPF, transitional AECs accumulate with ineffectual AEC1 differentiation. However, whether and how transitional cells cause fibrosis, whether keratins regulate transitional cell accumulation and fibrosis, and why transitional AECs and fibrosis resolve in mouse models but accumulate in IPF are unclear. Here, we show that human keratin 8 (KRT8) genetic variants were associated with IPF. Krt8-/- mice were protected from fibrosis and accumulation of the transitional state. Keratin 8 (K8) regulated the expression of macrophage chemokines and macrophage recruitment. Profibrotic macrophages and myofibroblasts promoted the accumulation of transitional AECs, establishing a K8-dependent positive feedback loop driving fibrogenesis. Finally, rare murine transitional AECs were highly senescent and basaloid and may not differentiate into AEC1s, recapitulating the aberrant basaloid state in human IPF. We conclude that transitional AECs induced and were maintained by fibrosis in a K8-dependent manner; in mice, most transitional cells and fibrosis resolved, whereas in human IPF, transitional AECs evolved into an aberrant basaloid state that persisted with progressive fibrosis.
Collapse
Affiliation(s)
- Fa Wang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Christopher Ting
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Kent A. Riemondy
- RNA Bioscience Initiative, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Michael Douglas
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Nisha Patel
- College of Literature, Science, and the Arts
| | - Norihito Kaku
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Jean Nemzek
- Unit for Laboratory Animal Medicine, School of Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Brian M. Varisco
- Division of Critical Care Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Erez Cohen
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Jasmine A. Wilson
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
| | - David W.H. Riches
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
- Department of Research, Veterans Affairs Eastern Colorado Health Care System, Denver Colorado, USA
| | - Elizabeth F. Redente
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, Colorado, USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Diana M. Toivola
- Cell Biology, Biosciences, Faculty of Science and Engineering, and InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Xiaofeng Zhou
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Bethany B. Moore
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan, USA
| | - Pierre A. Coulombe
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - M. Bishr Omary
- Department of Medicine, Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA
| | - Rachel L. Zemans
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Program in Cellular and Molecular Biology, School of Medicine, and
| |
Collapse
|
2
|
Miyazaki T, Fukushima K, Hashiguchi K, Ide S, Kobayashi T, Sawai T, Yatera K, Kohno Y, Fukuda Y, Futsuki Y, Matsubara Y, Koga H, Mihara T, Sasaki E, Ashizawa N, Hirayama T, Takazono T, Yamamoto K, Imamura Y, Kaku N, Kosai K, Morinaga Y, Yanagihara K, Mukae H. A high α1-antitrypsin/interleukin-10 ratio predicts bacterial pneumonia in adults with community-acquired pneumonia: a prospective cohort study. Pneumonia (Nathan) 2023; 15:16. [PMID: 37876022 PMCID: PMC10599029 DOI: 10.1186/s41479-023-00118-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/10/2023] [Indexed: 10/26/2023] Open
Abstract
BACKGROUND Current microbiological tests fail to identify the causative microorganism in more than half of all pneumonia cases. We explored biomarkers that could be used for differentiating between bacterial and viral pneumonia in patients with community-acquired pneumonia (CAP). METHODS In this prospective cohort study conducted in Japan, data obtained from adult patients with bacterial pneumonia, including bacterial and viral coinfections (bacterial pneumonia [BP] group), and purely viral pneumonia (VP group) at diagnosis were analyzed using multivariate logistic regression analysis to identify predictors of bacterial pneumonia. Furthermore, a decision tree was developed using the predictors. RESULTS A total of 210 patients were analyzed. The BP and VP groups comprised 108 and 18 patients, respectively. The other 84 patients had no identified causative microorganism. The two groups shared similar characteristics, including disease severity; however, a significant difference (p < 0.05) was observed between the two groups regarding sputum type; sputum volume score; neutrophil counts; and serum levels of interleukin (IL)-8, IL-10, and α1-antitrypsin (AAT). Sputum volume score (p < 0.001), IL-10 (p < 0.001), and AAT (p = 0.008) were ultimately identified as predictors of BP. The area under the curve for these three variables on the receiver operating characteristic (ROC) curve was 0.927 (95% confidence interval [CI]: 0.881-0.974). The ROC curve for sputum volume score and an AAT/IL-10 ratio showed a diagnostic cutoff of 1 + and 65, respectively. Logistic regression analysis using dichotomized variables at the cutoff values showed that the odds ratios for the diagnosis of BP were 10.4 (95% CI: 2.2-50.2) for sputum volume score (absence vs. presence) and 19.8 (95% CI: 4.7-83.2) for AAT/IL-10 ratio (< 65 vs. ≥ 65). CONCLUSIONS Considering that obtaining a definitive etiologic diagnosis with the current testing methods is difficult and time consuming, a decision tree with two predictors, namely sputum volume and the AAT/IL-10 ratio, can be useful in predicting BP among patients diagnosed with CAP and facilitating the appropriate use of antibiotics. TRIAL REGISTRATION UMIN000034673 registered on November 29, 2018.
Collapse
Affiliation(s)
- Taiga Miyazaki
- Division of Respirology, Rheumatology, Infectious Diseases, and Neurology, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan.
| | | | | | - Shotaro Ide
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
- Isahaya General Hospital, Isahaya, Japan
| | | | | | - Kazuhiro Yatera
- Department of Respiratory Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | | | | | | | | | | | | | | | - Nobuyuki Ashizawa
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Tatsuro Hirayama
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
- Department of Pharmacotherapeutics, Nagasaki University Graduate School of Biomedical Science, Nagasaki, Japan
| | - Takahiro Takazono
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kazuko Yamamoto
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
- First Department of Internal Medicine, Division of Infectious, Respiratory, and Digestive Medicine, University of the Ryukyus Graduate School of Medicine, Okinawa, Japan
| | - Yoshifumi Imamura
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
- Medical Education Development Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Microbiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| |
Collapse
|
3
|
Mitsumoto-Kaseida F, Morinaga Y, Sasaki D, Ota K, Kaku N, Sakamoto K, Kosai K, Hasegawa H, Hayashi J, Yanagihara K. The clinical characteristics and molecular epidemiology of methicillin-resistant Staphylococcus aureus (MRSA) among very elderly people in Japan. Geriatr Gerontol Int 2023; 23:744-749. [PMID: 37694453 DOI: 10.1111/ggi.14664] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 08/02/2023] [Accepted: 08/28/2023] [Indexed: 09/12/2023]
Abstract
AIM Methicillin-resistant Staphylococcus aureus (MRSA) is a major nosocomial infection-causing pathogen. The clonal shift from staphylococcal cassette chromosome mec (SCCmec) type II MRSA to SCCmec type IV MRSA has occurred rapidly in acute-care hospitals. However, the epidemiology and clinical impacts of MRSA in geriatric hospitals are poorly documented. We performed a molecular epidemiological analysis of the clinical isolates and retrospectively investigated the clinical characteristics of SCCmec type IV MRSA in elderly individuals. METHODS MRSA isolates were grouped according to the SCCmec type and virulence genes (tst, sea, seb, sec, and lukS/F-PV), and multi-locus sequence typing (MLST) was performed. RESULTS Of the 145 MRSA isolates obtained from patients with a median age of 85 years, 100 (69.0%) were obtained from sputum samples, 22 (15.2%) from skin and soft tissues, and seven (4.8%) from blood samples. The most prevalent clone was SCCmec type IV/clonal complex (CC)1/sea+ (59.3%), followed by SCCmec type I/sequence type (ST) 8 (17.3%). Of the 17 (11.7%) strains to which an anti-MRSA drug was administered by a physician, only three were SCCmec type IV/CC1/sea+ (17.6%) and five were SCCmec type I/ST8 (29.4%). SCCmec type IV/CC1/sea+ MRSA was more frequently isolated in long-term care wards than were SCCmec type I/ST8 strains (odds ratio: 2.85, 95% confidence interval: 1.08-7.54) and was less frequently treated as the cause of MRSA infections (odds ratio: 0.15, 95% confidence interval: 0.03-0.73). CONCLUSIONS SCCmec type IV/CC1/sea+ MRSA was the predominant clone and could be easily transmissible and be capable of colonization. Geriatr Gerontol Int 2023; 23: 744-749.
Collapse
Affiliation(s)
- Fujiko Mitsumoto-Kaseida
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Kyushu General Medicine Center, Haradoi Hospital, Fukuoka, Japan
| | - Yoshitomo Morinaga
- Department of Microbiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Jun Hayashi
- Kyushu General Medicine Center, Haradoi Hospital, Fukuoka, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
4
|
Shimada M, Taniguchi H, Yamaguchi H, Gyotoku H, Sasaki D, Kaku N, Senju C, Senju H, Imamura E, Takemoto S, Yamamoto K, Sakamoto N, Obase Y, Tsuchiya T, Fukuda M, Soda H, Ashizawa K, Fukuoka J, Nagayasu T, Yanagihara K, Mukae H. Genetic profile of thymic epithelial tumors in the Japanese population: an exploratory study examining potential therapeutic targets. Transl Lung Cancer Res 2023; 12:707-718. [PMID: 37197618 PMCID: PMC10183388 DOI: 10.21037/tlcr-22-794] [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: 11/08/2022] [Accepted: 03/07/2023] [Indexed: 03/29/2023]
Abstract
Background Thymic epithelial tumors (TETs) are prone to developing in East Asian populations. However, little is known about the genomic profile of TETs in East Asian populations, and the genomic aberrations in TETs have not yet been fully clarified. Thus, molecular targeted therapies for patients with TETs have not been established. This prospective study was conducted to explore the genetic abnormalities of surgically resected TETs in a Japanese cohort and to identify clues for carcinogenesis and potential therapeutic targets in TETs. Methods Genetic profiles of TETs were investigated using fresh-frozen specimens resected from operable cases with TETs. DNA sequencing was performed using a next-generation sequencing (NGS) gene panel test with Ion Reporter™ and CLC Genomics Workbench 11.0. The mutation sites were further confirmed by Sanger sequencing, digital droplet polymerase chain reaction (ddPCR), and TA cloning for validation. Results Among 43 patients diagnosed with anterior mediastinal tumors between January 2013 and March 2019, NGS and validation analyses were performed in 31 patients [29 thymomas and two thymic cancers (TCs)] who met the study criteria. Of these, 12 cases of thymoma types A, AB, B1, and B2 harbored the general transcription factor 2-I (GTF2I) mutation (L424H). Conversely, the mutation was not detected in type B3 thymoma or TC, suggesting that the GTF2I mutation existed in indolent types of TETs. Rat sarcoma viral oncogene (RAS) mutations were detected in three cases [Harvey RAS (HRAS) in two cases of type AB thymoma and neuroblastoma RAS (NRAS)] in one case of type B1 thymoma), and additional sex combs like 1 (ASXL1) mutation was present in one case of TC. All RAS mutations were observed in GTF2I-mutated cases. Conclusions The GTF2I mutation (L424H) is the most frequently occurring mutation in the limited histology of thymoma, consistent with those in the non-Asian population. HRAS and NRAS mutations co-occurred in cases harboring the GTF2I mutation. These findings suggest that the existence of the GTF2I mutation might be related to indolent types of TETs, and RAS mutations could be candidates as therapeutic targets in TETs.
Collapse
Affiliation(s)
- Midori Shimada
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Clinical Research Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Hirokazu Taniguchi
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroyuki Yamaguchi
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Clinical Oncology Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Hiroshi Gyotoku
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Chikako Senju
- Department of Plastic and Reconstructive Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Senju Hospital, Sasebo, Japan
| | - Hiroaki Senju
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Senju Hospital, Sasebo, Japan
| | - Erika Imamura
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shinnosuke Takemoto
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kazuko Yamamoto
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Division of Infectious, Respiratory, and Digestive Medicine, First Department of Internal Medicine, University of the Ryukyus Graduate School of Medicine, Okinawa, Japan
| | - Noriho Sakamoto
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasushi Obase
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tomoshi Tsuchiya
- Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Thoracic Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Minoru Fukuda
- Clinical Oncology Center, Nagasaki University Hospital, Nagasaki, Japan
- Department of Respiratory Medicine, Nagasaki Prefecture Shimabara Hospital, Shimabara, Japan
| | - Hiroshi Soda
- Department of Respiratory Medicine, Sasebo City General Hospital, Sasebo, Japan
| | - Kazuto Ashizawa
- Clinical Oncology Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Junya Fukuoka
- Department of Pathology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takeshi Nagayasu
- Department of Surgical Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
5
|
Kaku N, Urabe T, Iida T, Yun C, Nishida Y, Onitsuka Y, Hashiguchi K, Hirose K, Tomonaga A, Izumikawa K, Mukae H, Yanagihara K. Gargle sample is an effective option in a novel fully automated molecular point-of-care test for influenza: a multicenter study. Virol J 2023; 20:41. [PMID: 36869389 PMCID: PMC9983540 DOI: 10.1186/s12985-023-01993-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 02/16/2023] [Indexed: 03/05/2023] Open
Abstract
BACKGROUND We conducted a multicenter study to evaluate the performance of a novel fully automated molecular point-of-care test using transcription-reverse transcription concerted reaction that can detect influenza A and B within 15 min in nasopharyngeal swabs and gargle samples (TRCsatFLU). METHODS Patients who visited or were hospitalized at eight clinics and hospitals with influenza-like illnesses between December 2019 and March 2020 participated in this study. We collected nasopharyngeal swabs from all patients and gargle samples from patients whom the physician judged fit to perform gargling. The result of TRCsatFLU was compared to a conventional reverse transcription-polymerase chain reaction (RT-PCR). If the results of TRCsatFLU and conventional RT-PCR were different, the samples were analyzed by sequencing. RESULTS We evaluated 233 nasopharyngeal swabs and 213 gargle samples from 244 patients. The average age of the patients was 39.3 ± 21.2. Of the patients, 68.9% visited a hospital within 24 h of symptom onset. The most common symptoms were fever (93.0%), fatigue (79.5%), and nasal discharge (64.8%). All patients in whom the gargle sample was not collected were children. Influenza A or B was detected in 98 and 99 patients in nasopharyngeal swabs and gargle samples using TRCsatFLU, respectively. Four and five patients in nasopharyngeal swabs and gargle samples, respectively, with different TRCsatFLU and conventional RT-PCR results. Influenza A or B was detected using sequencing in all samples with different results. Based on the combined conventional RT-PCR and sequencing results, the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of TRCsatFLU for influenza detection in nasopharyngeal swabs were 0.990, 1.000, 1.000, and 0.993, respectively. In the gargle samples, the sensitivity, specificity, PPV, and NPV of the TRCsatFLU for detecting influenza were 0.971, 1.000, 1.000, and 0.974, respectively. CONCLUSIONS The TRCsatFLU showed great sensitivity and specificity for the detection of influenza in nasopharyngeal swabs and gargle samples. TRIAL REGISTRATION This study was registered in the UMIN Clinical Trials Registry (reference number: UMIN000038276) on October 11, 2019. Before sample collection, written informed consent for the participation and publication of this study was obtained from all participants.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, 852-8501, Japan. .,Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan. .,Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 4438 BSRB, 109 Zina Pitcher Pl, Ann Arbor, MI, 48109, USA.
| | - Tomohito Urabe
- Urabe Otorhinolaryngology Clinic, Nagasaki City, Nagasaki, Japan
| | - Tetsuya Iida
- Iida Naika Syounika Clinic, Nagasaki City, Nagasaki, Japan
| | - Chyuns Yun
- Ohisama Pediatric Clinic, Nagayo-cho, Nagasaki, Japan
| | - Yoshiyuki Nishida
- Nishida Gastrointestinal Internal Medicine Clinic, Nagasaki City, Nagasaki, Japan
| | | | - Kohji Hashiguchi
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki City, Nagasaki, Japan
| | | | | | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, 852-8501, Japan.,Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| |
Collapse
|
6
|
Kosai K, Kaku N, Horie M, Kodama H, Akamatsu N, Narita Y, Matsumoto Y, Matsushita T, Mizuta Y, Izumikawa K, Mukae H, Yanagihara K. Clinical evaluation of a fully automated and high-throughput molecular testing system for detection of influenza virus. Virol J 2022; 19:188. [PMID: 36384638 PMCID: PMC9667434 DOI: 10.1186/s12985-022-01916-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 11/03/2022] [Indexed: 11/17/2022] Open
Abstract
Introduction We investigated the performance of the cobas® 6800 system and cobas SARS-CoV-2 & Influenza A/B, a fully automated molecular testing system for influenza viruses and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This enabled an assay in a batch of 96 samples in approximately 3 h. Methods An assay was performed using the cobas SARS-CoV-2 & Influenza A/B on the cobas 6800 system for samples collected in four facilities between November 2019 and March 2020 in our previous study. The results were compared with those obtained using the reference methods. Results Of the 127 samples analyzed, the cobas SARS-CoV-2 & Influenza A/B detected influenza A virus in 75 samples, of which 73 were positive using the reference methods. No false negative results were observed. The overall positive and negative percent agreement for influenza A virus detection were 100.0% and 96.3%, respectively. There were no positive results for the influenza B virus or SARS-CoV-2. Conclusion The cobas 6800 system and cobas SARS-CoV-2 & Influenza A/B showed high accuracy for influenza A virus detection and can be useful for clinical laboratories, especially those that routinely assay many samples.
Collapse
|
7
|
Sakatani H, Kono M, Sugita G, Nanushaj D, Hijiya M, Iyo T, Shiga T, Murakami D, Kaku N, Yanagihara K, Nahm MH, Hotomi M. Investigation on the virulence of non-encapsulated Streptococcus pneumoniae using liquid agar pneumonia model. J Infect Chemother 2022; 28:1452-1458. [PMID: 35835387 DOI: 10.1016/j.jiac.2022.07.003] [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: 02/23/2022] [Revised: 06/14/2022] [Accepted: 07/04/2022] [Indexed: 10/31/2022]
Abstract
INTRODUCTION Since the introduction of pneumococcal conjugate vaccine, there have been warnings of an increase in infections caused by non-vaccine type of Streptococcus pneumoniae strains. Among them, nonencapsulated Streptococcus pneumoniae (NESp) has been reported to cause invasive infections, especially in children and the elderly. Due to low virulence, however, basic experimental reports on invasive infections are limited. METHODS We applied a liquid-agar method to establish a mouse model of invasive NESp infection. Mice were intratracheally administered a bacterial suspension including agar. With this technique, we investigated the pathogenicity of NESp and the effect of Pneumococcal surface protein K (PspK), a specific surface protein antigen of NESp. NESp wild-type strain (MNZ11) and NESp pspK-deleted mutant strain (MNZ1131) were used in this study. The survival rate, number of bacteria, cytokine/chemokine levels in the bronchoalveolar lavage fluid, and histology of the lung tissue were evaluated. RESULTS Mice that were intratracheally administered MNZ11 developed lethal pneumonia with bacteremia within 48 h. Conversely, MNZ1131 showed predominantly low lethality without significant pro-inflammatory cytokine production. NESp was found to cause severe pneumonia and bacteremia upon reaching the lower respiratory tract, and PspK was a critical factor of NESp for developing invasive infections. CONCLUSIONS The current study demonstrated the ability of NESp to develop invasive diseases, especially in connection with PspK by use of a mouse pneumonia model.
Collapse
Affiliation(s)
- Hideki Sakatani
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Masamitsu Kono
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Gen Sugita
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan; Sugita ENT Clinic, Mihama-Ku Takasu 3-14-1, Chiba City, Chiba, 261-0004, Japan
| | - Denisa Nanushaj
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Masayoshi Hijiya
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Takuro Iyo
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Tatsuya Shiga
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Daichi Murakami
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University, Sakamoto 1-7-1, Nagasaki City, Nagasaki, 852-8501, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University, Sakamoto 1-7-1, Nagasaki City, Nagasaki, 852-8501, Japan
| | - Moon H Nahm
- Department of Medicine, University of Alabama at Birmingham, 1720 2nd Ave South Birmingham, Alabama, 35294, USA
| | - Muneki Hotomi
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Kimiidera 811-1, Wakayama City, Wakayama, 641-8509, Japan.
| |
Collapse
|
8
|
Kawamoto Y, Kaku N, Akamatsu N, Sakamoto K, Kosai K, Morinaga Y, Ohmagari N, Izumikawa K, Yamamoto Y, Mikamo H, Kaku M, Oishi K, Yanagihara K. The surveillance of colistin resistance and mobilized colistin resistance genes in multidrug-resistant Enterobacteriaceae isolated in Japan. Int J Antimicrob Agents 2021; 59:106480. [PMID: 34801675 DOI: 10.1016/j.ijantimicag.2021.106480] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 11/03/2021] [Accepted: 11/12/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND The plasmid-mediated bacterial colistin-resistant gene, mcr, is of global concern in clinical healthcare. However, there are few reports of surveillance for mcr in Japan. The aim of this study was to assess the prevalence of colistin resistance by identifying nine mcr genes in extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae and carbapenem-resistant Enterobacteriaceae (CRE) isolates in Japan. METHODS A total of 273 ESBL and CRE clinical isolates were collected from patients in five tertiary hospitals from August 2016 to March 2017. Minimum inhibitory concentration (MIC) of colistin was measured using the microdilution method. Polymerase chain reaction (PCR) was performed to detect mcr-1 to mcr-9 genes in all strains. Whole-genome sequencing (WGS) analysis was conducted for any mcr-genes identified that had not been previously reported in patients from Japan. RESULTS The rate of colistin resistance was 7.7% in all strains, with a higher rate in the CRE strains than in the ESBL-producing strains (20.4% versus 1.1%). The mcr-5 and mcr-9 gene were detected in one ESBL-producing Escherichia coli strain (1/273, 0.37%) and three CRE strains (3/273, 1.1%), respectively. As the ESBL-producing E. coli strain was the first clinical strain with mcr-5 in Japan, WGS analysis was performed for the strain. The sequence type of the mcr-5-positive strain was ST1642 and it carried two distinct plasmids, ESBL gene-carrying pN-ES-6-1, and mcr-5.1-carrying pN-ES-6-2. CONCLUSIONS The results of this study showed that the frequency of colistin resistance and mcr-positive strains is not high in Japan. As the MIC for colistin was low in the mcr-5.1 and mcr-9 gene-positive strain, continuous monitoring of mcr genes is necessary.
Collapse
Affiliation(s)
- Yasuhide Kawamoto
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan; Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, USA.
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan; Department of Microbiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
| | - Norio Ohmagari
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Yoshihiro Yamamoto
- Department of Clinical Infectious Diseases, Graduate School of Medicine and Pharmaceutical Sciences for Research, University of Toyama, Japan
| | - Hiroshige Mikamo
- Department of Clinical Infectious Diseases, Aichi Medical University Graduate School of Medicine, Japan
| | - Mitsuo Kaku
- Department of Infection Control and Laboratory Diagnostics, Tohoku University Graduate School of Medicine, Japan
| | - Kazunori Oishi
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases Correspondence, Japan; Toyama Institute of Health, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| |
Collapse
|
9
|
Kaku N, Nishimura F, Shigeishi Y, Tachiki R, Sakai H, Sasaki D, Ota K, Sakamoto K, Kosai K, Hasegawa H, Izumikawa K, Ariyoshi K, Mukae H, Yasuda J, Morita K, Kohno S, Yanagihara K. Performance of anti-SARS-CoV-2 antibody testing in asymptomatic or mild COVID-19 patients: A retrospective study in outbreak on a cruise ship. PLoS One 2021; 16:e0257452. [PMID: 34582459 PMCID: PMC8478248 DOI: 10.1371/journal.pone.0257452] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/01/2021] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVES A few studies on antibody testing have focused on asymptomatic or mild coronavirus disease 2019 (COVID-19) patients with low initial anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibody responses. Anti-SARS-CoV-2 antibody-testing performance was evaluated using blood samples from asymptomatic or mild COVID-19 patients. METHODS Blood samples were collected from 143 COVID-19 patients during an outbreak on a cruise ship 3 weeks after diagnosis. Simultaneously, a follow-up SARS-CoV-2 genetic test was performed. Samples stored before the COVID-19 pandemic were also used to evaluate the lateral flow immunochromatographic assay (LFA) and electrochemiluminescence immunoassay (ECLIA). Titers of anti-SARS-CoV-2 IgM and IgG antibodies against the nucleocapsid and spike proteins were measured using the enzyme-linked immunosorbent assay to confirm which antibodies were influenced on LFA- and ECLIA- false-negative result in crew-member samples. RESULTS Sensitivity, specificity, positive-predictive, and negative-predictive values of LFA-detected IgM antibodies were 0.231, 1.000, 1.000, and 0.613, respectively; those of LFA-detected IgG antibodies were 0.483, 0.989, 0.972, and 0.601, respectively; and those of ECLIA-detected total antibodies were 0.783, 1.000, 1.000, and 0.848, respectively. All antibody titers measured using ELISA were significantly lower in blood samples with negative results than in those with positive results in both LFA and ECLIA. In the patients with negative results from the follow-up genetic testing, IgM-, IgG-, and total-antibody positivity rates were 22.9%, 47.6%, and 72.4%, respectively. CONCLUSIONS These findings suggest that anti-SARS-CoV-2 antibody testing has lower performance in asymptomatic or mild COVID-19 patients than required in the guidelines.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Fumitaka Nishimura
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Yui Shigeishi
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Rina Tachiki
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | | | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki City, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
| | - Jiro Yasuda
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki City, Nagasaki, Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | | | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Nagasaki, Japan
| |
Collapse
|
10
|
Ota K, Yanagihara K, Sasaki D, Kaku N, Uno N, Sakamoto K, Kosai K, Miyazaki T, Hasegawa H, Fujita A, Tashiro M, Tanaka T, Izumikawa K, Ariyoshi K, Mukae H, Yasuda J, Morita K, Kohno S. Detection of SARS-CoV-2 using qRT-PCR in saliva obtained from asymptomatic or mild COVID-19 patients, comparative analysis with matched nasopharyngeal samples. PLoS One 2021; 16:e0252964. [PMID: 34111203 PMCID: PMC8191987 DOI: 10.1371/journal.pone.0252964] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/25/2021] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES The accurate detection of severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) is essential for the diagnosis of coronavirus disease 2019 (COVID-19). We compared the quantitative RT-PCR results between nasopharyngeal swabs and saliva specimens. METHODS A COVID-19 outbreak occurred on a cruise ship at Nagasaki port, Japan. We obtained 123 nasopharyngeal swabs and saliva each from asymptomatic or mild patients in the late phase of infection. RESULTS The intervals from the diagnosis to the sampling were 25.5 days for nasopharyngeal swabs and 28.9 days for saliva. The positive rate was 19.5% (24/123) for nasopharyngeal swabs and 38.2% (47/123) for saliva (P = 0.48). The quantified viral copies (mean ± SEM copies/5 μl) were 9.3±2.6 in nasopharyngeal swabs and 920±850 in saliva (P = 0.0006). CONCLUSIONS The advantages of saliva specimens include positive rate improvement and accurate viral load detection. Saliva may be used as a reliable sample for SARS-CoV-2 detection.
Collapse
Affiliation(s)
- Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Taiga Miyazaki
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Ayumi Fujita
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Masato Tashiro
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Takeshi Tanaka
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Koichi Izumikawa
- Infection Control and Education Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Koya Ariyoshi
- Department of Infectious Diseases, Nagasaki University Hospital, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Jiro Yasuda
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Kouichi Morita
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | | |
Collapse
|
11
|
Taniguchi D, Watanabe H, Morinaga Y, Sasaki D, Matsuda J, Sato S, Kaku N, Miyazaki T, Matsumoto K, Tsuchiya T, Sakaeda T, Yanagihara K, Nagayasu T. Safety, efficacy, and analysis of key parameters after prophylactic administration of a sustained-release formulation of azithromycin in lung cancer surgery. Ann Palliat Med 2021; 10:5098-5107. [PMID: 33894712 DOI: 10.21037/apm-21-383] [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] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 03/23/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND The current use of prophylactic antibiotics for lung cancer surgery requires modification in aging individuals with impaired lung function. A sustained-release formulation of azithromycin (AZM-SR) could help resolve some of these challenges with its sustained antibacterial and anti-inflammatory effects. The aim of this study was to examine the safety and efficacy of AZM-SR in lung cancer surgery as well as its anti-inflammatory effect. METHODS Fifty patients were included in the study, and AZM-SR was administered 1 day prior to the surgery. The clinical course, including postoperative complications, was monitored, and the concentration of AZM, bacterial culture, and inflammatory cytokine levels of resected lung specimens were evaluated. RESULTS No side effects related to AZM-SR were observed. Five cases of postoperative pneumonia (10%) were observed; technical issues were involved in 3 cases. All patients recovered well. Four cases showed positive bacterial culture upon lung tissue examination; however, this was not significantly correlated with postoperative complications. A negative correlation was observed between AZM concentration in lung tissue and interleukin-6 (IL-6) expression. CONCLUSIONS Prophylactic utilization of AZM-SR in lung cancer surgery seems feasible. The anti-inflammatory effect of AZM might contribute additional beneficial effects in the perioperative management of lung cancer surgery.
Collapse
Affiliation(s)
- Daisuke Taniguchi
- Department of Surgical Oncology, Nagasaki University Graduate School of Medicine, Nagasaki, Japan; Medical-Engineering Hybrid Professional Development Program, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hironosuke Watanabe
- Department of Surgical Oncology, Nagasaki University Graduate School of Medicine, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Microbiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan; Department of Laboratory Medicine, Nagasaki University, Nagasaki, Japan;
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University, Nagasaki, Japan;
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University, Nagasaki, Japan;
| | - Shuntaro Sato
- Nagasaki University Hospital Clinical Research Center, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University, Nagasaki, Japan;
| | - Takuro Miyazaki
- Department of Surgical Oncology, Nagasaki University Graduate School of Medicine, Nagasaki, Japan
| | - Keitaro Matsumoto
- Department of Surgical Oncology, Nagasaki University Graduate School of Medicine, Nagasaki, Japan; Medical-Engineering Hybrid Professional Development Program, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tomoshi Tsuchiya
- Department of Surgical Oncology, Nagasaki University Graduate School of Medicine, Nagasaki, Japan
| | - Toshiyuki Sakaeda
- Department of Pharmacokinetics, Kyoto Pharmaceutical University, Kyoto, Japan
| | | | - Takeshi Nagayasu
- Department of Surgical Oncology, Nagasaki University Graduate School of Medicine, Nagasaki, Japan; Medical-Engineering Hybrid Professional Development Program, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
12
|
Kaku N, Ota K, Sasaki D, Akamatsu N, Uno N, Sakamoto K, Kosai K, Hasegawa H, Izumikawa K, Mukae H, Yanagihara K. Had COVID-19 spread in the community before the first confirmed case in Nagasaki, Japan? Microbes Infect 2021; 23:104812. [PMID: 33781868 PMCID: PMC7997852 DOI: 10.1016/j.micinf.2021.104812] [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: 02/22/2021] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 11/17/2022]
Abstract
This retrospective study evaluated stored nasopharyngeal swab samples from Japanese patients with influenza-like illness during the 2019/2020 season. We aimed to determine whether COVID-19 had spread in the community before the first confirmed case. The period of influenza season during 2019/2020 in Nagasaki was shorter than in previous influenza seasons. When the first COVID-19 case was reported in Nagasaki prefecture, the number of influenza cases were very low. No positive results for SARS-CoV-2 were detected in 182 samples that were obtained from adult outpatients. Our results revealed no large-scale spread of COVID-19 in the community before the first confirmed case.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan.
| | - Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, Japan
| |
Collapse
|
13
|
Kaku N, Hashiguchi K, Akamatsu N, Wakigawa F, Matsuda J, Komaru K, Nakao T, Harada Y, Hara A, Uno N, Sakamoto K, Morinaga Y, Kitazaki T, Hasegawa H, Miyazaki T, Fukuda M, Izumikawa K, Mukae H, Yanagihara K. Evaluation of a novel rapid TRC assay for the detection of influenza using nasopharyngeal swabs and gargle samples. Eur J Clin Microbiol Infect Dis 2021; 40:1743-1748. [PMID: 33594599 PMCID: PMC7885976 DOI: 10.1007/s10096-021-04193-7] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 02/09/2021] [Indexed: 11/26/2022]
Abstract
We evaluated a novel transcription-reverse transcription concerted reaction (TRC) assay that can detect influenza A and B within 15 min using nasopharyngeal swab and gargle samples obtained from patients with influenza-like illness, between January and March 2018 and between January and March 2019. Based on the combined RT-PCR and sequencing results, in the nasal swabs, the sensitivity and specificity of TRC for detecting influenza were calculated as 1.000 and 1.000, respectively. In the gargle samples, the sensitivity and specificity of TRC were 0.946 and 1.000, respectively. The TRC assay showed comparable performance to RT-PCR in the detection of influenza viruses.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan.
| | - Kohji Hashiguchi
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Fumiko Wakigawa
- Department of Clinical Laboratory, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kenzo Komaru
- Department of Clinical Laboratory, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Takumi Nakao
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Yosuke Harada
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Atsuko Hara
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Takeshi Kitazaki
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Taiga Miyazaki
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Masaaki Fukuda
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| |
Collapse
|
14
|
Kaku N, Kodama H, Akamatsu N, Ota K, Kosai K, Morinaga Y, Narita Y, Matsumoto Y, Matsushita T, Mizuta Y, Izumikawa K, Mukae H, Yanagihara K. Multicenter evaluation of molecular point-of-care testing and digital immunoassays for influenza virus A/B and respiratory syncytial virus in patients with influenza-like illness. J Infect Chemother 2021; 27:820-825. [PMID: 33509674 DOI: 10.1016/j.jiac.2021.01.010] [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] [Received: 12/21/2020] [Revised: 01/12/2021] [Accepted: 01/15/2021] [Indexed: 10/22/2022]
Abstract
INTRODUCTION Digital immunoassays (DIAs) and molecular point-of-care (POC) tests for influenza were recently developed. We aimed to evaluate and compare the positive rate with molecular POC tests and DIAs in detecting influenza virus A, B and respiratory syncytial virus (RSV). METHODS A prospective observational study was conducted in 2019-2020. Nasopharyngeal swab samples were collected from adult outpatients with influenza-like illness who visited four hospitals and clinics in Japan. DIAs were performed at each facility. The clinical diagnosis was determined based on the findings of DIAs, history taking, and physical assessment. Molecular POC test and reverse transcription polymerase chain reaction (RT-PCR) were performed later. RESULTS A total of 182 patients were evaluated. The positive rate for influenza virus with molecular POC test was significantly higher than that with DIAs (51.6% versus 40.7%, p = 0.046). In patients who tested positive for influenza virus with only molecular POC test, the presence of influenza virus was confirmed by RT-PCR. In a comparison between the patients who were positive for influenza virus with only molecular POC test and those with both molecular POC test and DIA, the percentage of patients who sought consultation within 18 h after the onset of symptoms was significantly higher in the molecular POC test only group than in the both methods group (70.0% versus 43.2%, p = 0.044). CONCLUSIONS A molecular POC test could contribute to the accurate diagnosis of influenza in patients with influenza-like illness, especially those who visited a hospital immediately after the onset of symptoms.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan.
| | - Hina Kodama
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| | - Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan; Department of Microbiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama City, Toyama, Japan
| | - Yusuke Narita
- Narita Naika Clinic, 2026-6 Yoshimuta-go, Nagayo cho, Nishisonogi-gun, Nagasaki, Japan
| | - Yasushi Matsumoto
- Matsumoto Naika, 257-1 Kohjiroki, Kunimi-cho, Unzen City, Nagasaki, Japan
| | - Tetsuro Matsushita
- Shinzato Medicare Group Shinzato Clinic, 3-20 Mori-machi, Nagasaki City, Nagasaki, Japan
| | - Yohei Mizuta
- Menoto Hosiptal, 849-18 Koda-go, Nagayo cho, Nishisonogi-gun, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki City, Nagasaki, Japan
| |
Collapse
|
15
|
Ota K, Kaku N, Uno N, Sakamoto K, Kosai K, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. 1273. Efficacy of Cefiderocol against carbapenem-resistant A. baumannii and P. aeruginosa in ventilator-associated pneumonia mouse model. Open Forum Infect Dis 2020. [PMCID: PMC7777080 DOI: 10.1093/ofid/ofaa439.1457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Cefiderocol (CFDC) is a novel cephalosporin with siderophore structure, characterized by transportation through siderophore receptor on outer membrane of Gram-negative bacteria and structural stability against beta-lactamase. The antimicrobial activity against multidrug resistant bacteria is demonstrated in vitro and in vivo. In this study, we aimed to elucidate the in vivo efficacy of CFDC using ventilator-associated pneumonia (VAP) mouse model. Methods The minimum inhibitory concentration (MIC) of CFDC and meropenem (MEPM) against the test Acinetobacter baumannii (Ab) and Pseudomonas aeruginosa (Pa) isolates were measured by broth microdilution assay. Iron depleted medium was used for CFDC. For VAP mouse models, neutropenia was induced by cyclophosphamide intraperitoneal administration, followed by intubation of sterile tube in the trachea and inoculation of bacterial suspension. PK analysis were performed in infected mice, in order to determine treatment regimens to achieve targeted time above MIC (TAM) of free concentrations in plasma. Treatment was initiated 3 hours post infection and continued up to 120 h for survival analysis. To investigate the bactericidal effect, the mice were sacrificed to count bacterial load in the lung at 48 h and 24 h for VAP-Ab and Pa, respectively. Results MICs(mg/L) of CFDC and MEPM against Ab were 0.5 and 128, and Pa were 0.008 and 16, respectively. The treatment regimens to achieve target MIC were shown in Table 1. In order to assess dose dependency of CFDC, required doses to achieve TAM of 70%, 90%, and 100% were calculated. These doses used in the studies were achievable in human for CFDC, but not for MEPM due to high MICs of the test strains. In treatment study for VAP-Ab, bactericidal effect was achieved at TAM > 70% in CFDC groups, as well as TAM 30% in MEPM group. In VAP-Pa, bactericidal effect was observed at TAM > 90% in CFDC groups, as well as TAM 30% in MEPM group. Table 1.Treatment regimen and free TAM against VAP-Ab and Pa ![]()
Figure 1. Bacterial load in the lungs of VAP-Ab and Pa ![]()
Conclusion The efficacy of CFDC against VAP-Ab and Pa were demonstrated in this study. Although 90% free TAM was required for bactericidal effect, CFDC was shown to be effective against carbapenem-resistant Gram-negative pathogens at the recommended clinical dosing regimen. Disclosures Katsunori Yanagihara, MD, PhD, Shionogi & Co.,Ltd. (Grant/Research Support)
Collapse
Affiliation(s)
- Kenji Ota
- Nagasaki University, Nagasaki, Nagasaki, Japan
| | | | - Naoki Uno
- Nagasaki University, Nagasaki, Nagasaki, Japan
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Ota K, Kaku N, Uno N, Sakamoto K, Morinaga Y, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. The effectiveness of meropenem and amikacin combination therapy against Carbapenemase-producing Klebsiella pneumoniae pneumonia mouse model. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
17
|
Yamashita Y, Nagaoka K, Kimura H, Suzuki M, Fukumoto T, Hayasaka K, Kaku N, Morinaga Y, Yanagihara K, Konno S. Pathogenic Effect of Prevotella intermedia on a Mouse Pneumonia Model Due to Methicillin-Resistant Staphylococcus aureus With Up-Regulated α-Hemolysin Expression. Front Microbiol 2020; 11:587235. [PMID: 33117325 PMCID: PMC7575765 DOI: 10.3389/fmicb.2020.587235] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 09/14/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Methicillin-resistant Staphylococcus aureus (MRSA) is a common causative agent of pneumonia; however, the detailed mechanism underlying severe MRSA pneumonia, including association with oral hygiene or periodontitis, remains poorly characterized. In this study, we examined the pathogenic effect of Prevotella intermedia, a major periodontopathic pathogen, on MRSA pneumonia. Methods: The pathogenic effect of the supernatant of P. intermedia (Pi Sup) was investigated in a murine MRSA pneumonia model, using several clinical strains; whereas the bactericidal activity of polymorphonuclear leukocytes (PMNs) was investigated in vitro. The effect of Pi Sup on messenger RNA (mRNA) expression of the toxin/quorum sensing system (rnaIII) was investigated by quantitative reverse transcription PCR both in vitro and in vivo. Results: Mice infected by hospital-acquired MRSA (HA-MRSA) with Pi Sup exhibited a significantly lower survival rate, higher bacterial loads in the lungs, and higher α-hemolysin (hla) expression in the lungs, than those without Pi Sup. A similar effect of Pi Sup was not observed with MRSA strains producing Panton-Valentine leucocidin (PVL) or toxic shock syndrome toxin (TSST). In vitro, Pi Sup suppressed bactericidal activity of PMNs against the HA-MRSA strain. HA-MRSA was the clinical strain with the highest ability to proliferate in the lungs and was accompanied by time-dependent up-regulation of rnaIII and hla. Conclusions: Our results provide novel evidence that the product of P. intermedia exerts a pathogenic effect on MRSA pneumonia, in particular with a strain exhibiting strong proliferation in the lower airway tract. Moreover, our results indicate that P. intermedia affects MRSA toxin expression via quorum sensing in a strain-dependent fashion, which might be important for understanding the pathogenesis of severe MRSA pneumonia.
Collapse
Affiliation(s)
- Yu Yamashita
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kentaro Nagaoka
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hiroki Kimura
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Masaru Suzuki
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Tatsuya Fukumoto
- Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo, Japan
| | - Kasumi Hayasaka
- Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Satoshi Konno
- Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| |
Collapse
|
18
|
Uno N, Kaku N, Morinaga Y, Hasegawa H, Yanagihara K. Flow cytometry assay for the detection of single-copy DNA in human lymphocytes. Nucleic Acids Res 2020; 48:e86. [PMID: 32544240 PMCID: PMC7470942 DOI: 10.1093/nar/gkaa515] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/09/2020] [Accepted: 06/05/2020] [Indexed: 11/23/2022] Open
Abstract
Specific nucleic acid sequences can be detected in individual cells by in situ hybridization. However, when very few copies of a target sequence are present per cell, its signal is undetectable by flow cytometry. Although various approaches have been developed to increase fluorescence signals for in situ hybridization, flow cytometric detection of specific genomic DNA sequences has not been established. Here, we present a flow cytometry assay for detection of single-copy genomic sequences in human lymphocytes using in situ PCR with universal energy transfer-labelled primers.
Collapse
Affiliation(s)
- Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| |
Collapse
|
19
|
Kaku N, Shimada T, Nogami R, Tagomori H, Tsumura H. Three Dimensional Architecture of the Acetabular Transverse Ligament and its Connection with the Acetabular Labrum. Muscles Ligaments Tendons J 2020. [DOI: 10.32098/mltj.03.2020.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- N. Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - T. Shimada
- Oita College of Judo Therapy and Acupuncture-Moxibustion, Oita City, Japan
| | - R. Nogami
- Oita University Graduate School of Medicine, Graduate School of Orthopedic Surgery, Yufu City, Oita, Japan
| | - H. Tagomori
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - H. Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| |
Collapse
|
20
|
Ota K, Kaku N, Yanagihara K. Efficacy of meropenem and amikacin combination therapy against carbapenemase-producing Klebsiella pneumoniae mouse model of pneumonia. J Infect Chemother 2020; 26:1237-1243. [PMID: 32868198 DOI: 10.1016/j.jiac.2020.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 04/28/2020] [Revised: 05/27/2020] [Accepted: 07/08/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND The emergence and spread of carbapenem-resistant Enterobacteriaceae (CRE) is a global health problem due to its high mortality and limited treatment options. Combination antimicrobial therapy is reported to be effective against CRE in vitro; however, its efficacy in vivo has not been thoroughly evaluated. Thus, this study assessed the efficacy of combination therapy of meropenem (MEPM) and amikacin (AMK) in a carbapenem-resistant Klebsiella pneumoniae (CR-Kp) mouse model of pneumonia. MATERIALS AND METHODS Agar-based bacterial suspension of CR-Kp clinical isolates was inoculated into the trachea of BALB/c mice. Treatment was initiated 6 h post infection, with 100 mg/kg MEPM every 6 h, 100 mg/kg AMK every 12 h, or in combination; survival was evaluated for 7 days. The number of viable bacteria in the lungs, lung histopathology, and neutrophil counts in broncho-alveolar lavage fluid (BALF) were evaluated 42 h after infection. RESULTS All mice in the untreated control group died in 48 h, while all the mice in treatment groups survived past 7 days following infection. The bacterial count in the lungs (log10 CFU/mL, mean ± SEM) in the combination group (2.00 ± 0.00) decreased significantly compared to that in control (10.19 ± 0.11, p < 0.0001), MEPM (6.38 ± 0.17, p < 0.0001), and AMK (6.17 ± 0.16, p < 0.0001) groups. BALF neutrophil count reduced only in the combination therapy group. Combination therapy prevented the progression of lung inflammation, including alveolar neutrophil infiltration and hemorrhage. CONCLUSIONS This study demonstrates in vivo efficacy of MEPM and AMK combination therapy against CR-Kp pneumonia.
Collapse
Affiliation(s)
- Kenji Ota
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan.
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| |
Collapse
|
21
|
Kawamoto Y, Morinaga Y, Kaku N, Uno N, Kosai K, Sakamoto K, Hasegawa H, Yanagihara K. A novel macrolide, solithromycin suppresses mucin overexpression induced by Pseudomonas aeruginosa LPS in airway epithelial cells. J Infect Chemother 2020; 26:1008-1010. [PMID: 32651065 DOI: 10.1016/j.jiac.2020.06.014] [Citation(s) in RCA: 3] [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: 05/08/2020] [Revised: 06/09/2020] [Accepted: 06/12/2020] [Indexed: 11/28/2022]
Abstract
Some macrolides such as 14- and 15-membered macrolides have immunomodulatory effects such as suppression of mucin overproduction. Because a novel macrolide, solithromycin, was developed, we examined whether it suppresses the overexpression of mucin in vitro. A human airway epithelial cell line NCI-H292 was stimulated by Pseudomonas aeruginosa lipopolysaccharides to induce the overproduction of a major mucin, MUC5AC. Treatment with 10 μg/mL of solithromycin significantly inhibited LPS-induced MUC5AC in both mRNA and protein levels as well as a 15-membered macrolide, azithromycin. These findings support that solithromycin has a potential immunomodulatory effect.
Collapse
Affiliation(s)
- Yasuhide Kawamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan.
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Kei Sakamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| | - Katunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan
| |
Collapse
|
22
|
Kaku N, Matsumoto N, Sasaki D, Tsuda K, Kosai K, Uno N, Morinaga Y, Tagami A, Adachi S, Hasegawa H, Osaki M, Yanagihara K. Effect of probiotics on gut microbiome in patients with administration of surgical antibiotic prophylaxis: A randomized controlled study. J Infect Chemother 2020; 26:795-801. [PMID: 32284181 DOI: 10.1016/j.jiac.2020.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/18/2020] [Accepted: 03/10/2020] [Indexed: 01/27/2023]
Abstract
Surgical antibiotic prophylaxis (SAP) is recommended for the prevention of surgical site infections. However, there is a concern about adverse effects of SAP, such as antibiotic-associated diarrhea (AAD). To prevent AAD, administration of probiotics has been investigated. Although recent advances in next-generation sequencing makes it possible to analyze the gut microbiome, the effect of probiotics on the gut microbiome in the patients with SAP remains unknown. To test a hypothesis that SAP influences the gut microbiome and probiotics prevent the influence, a randomized controlled study was conducted with patients who underwent spinal surgery at Nagasaki University Hospital. After obtaining informed consent, the patients were automatically classified into the non-probiotics group and the probiotics group. In the probiotics group, the patients took 1 g of Enterococcus faecium 129 BIO 3B-R, 3 times a day on postoperative days (PODs) 1-5. The feces of all patients were sampled before administration of SAP and on PODs 5 and 10. We compared alpha and beta diversity and differential abundance analysis of the gut microbiome before and after SAP. During the study period, a total of 33 patients were evaluated, comprising 17 patients in the non-probiotics group and 16 in the probiotics group. There was no significant difference between the groups regarding patient characteristics. In alpha and beta diversity, there were no significant differences among all combinations. In differential abundance analysis at operational taxonomic unit level, Streptococcus gallolyticus and Roseburia were significantly increased in the non-probiotics group and significantly decreased in the probiotics group.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Nariyoshi Matsumoto
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Keiichi Tsuda
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Atsushi Tagami
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shinji Adachi
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Makoto Osaki
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
23
|
Kaku N, Ohnishi T, Matsumoto T, Watanabe S, Yanagihara K. Molecular characteristics of methicillin-resistant Staphylococcus aureus isolated from skin and soft tissue infections collected in the Japanese nationwide surveillance. J Dermatol 2019; 46:1205-1209. [PMID: 31553075 DOI: 10.1111/1346-8138.15093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 07/29/2019] [Accepted: 08/27/2019] [Indexed: 11/26/2022]
Abstract
Skin and soft tissue infections (SSTI) are a common infection among both outpatients and inpatients. The most frequently isolated bacterium in SSTI was Staphylococcus aureus, a quarter of which was methicillin-resistant S. aureus (MRSA). In this study, to investigate molecular epidemiology of the 141 MRSA strains collected in the Japanese nationwide surveillance, we performed multiplex real-time polymerase chain reaction to detect staphylococcal cassette chromosome mec (SCCmec) type and virulence genes. The percentage of SCCmec types I, II, III and IV was 1.4%, 52.5%, 5.7% and 40.4%, respectively. According to the SCCmec type, we classified the strains into health-care-associated (HA)-MRSA (n = 84) and community-associated (CA)-MRSA (n = 57). Among the virulence genes, the percentage of enterotoxin C gene-positive strains was significantly higher in CA-MRSA than in HA-MRSA. No significant differences were detected between the two groups in terms of antibiotic susceptibility and patients' background information, classification of SSTI or symptoms of SSTI.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takamitsu Ohnishi
- Department of Dermatology, Teikyo University School of Medicine, Tokyo, Japan
| | - Tetsuya Matsumoto
- Department of Infectious Diseases, International University of Health and Welfare, Chiba, Japan
| | - Shinichi Watanabe
- Department of Dermatology, Teikyo University School of Medicine, Tokyo, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
24
|
Yamaguchi H, Gyotoku H, Taniguchi H, Sasaki D, Shimada M, Dotsu Y, Senju H, Kaku N, Ikeda T, Fukuda M, Yanagihara K, Mukae H. Abstract 1705: Genetic analysis of thymoma and thymic carcinoma. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-1705] [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] [Indexed: 11/16/2022]
Abstract
Abstract
[Background] Thymic epidermal tumors (thymoma and thymic cancer) are rare, and its genetic profiles are unclear. Molecular targeted therapy of thymic tumors has not been established. Clarifying a molecular alteration and to identify the novel targets for molecular targeted therapy is important. So, we conducted the next generation sequencing (NGS) analysis with surgically resected thymic tumor tissues.
[Methods] From July 2013 to October 2018, thirty patients who were resected thymic epidermal tumors in our hospital were enrolled in this study. We got written informed consent from patients, and NGS analysis of extracted DNA sample was performed in 24 patients to the present time. DNA were extracted from fresh frozen surgically resected tissues (tumors and paired normal tissues) and DNA amplicon sequencing was performed with a custom panel of 53 cancer-related genes based on Ion AmpliSeq™ Cancer Hotspot Panel v2 comprising major oncogenes and tumor suppressor genes (including GTF2I). Sequencing was carried out with an Ion Torrent PGM™. Sequencing data were analyzed using Ion Reporter™. In addition, we collected the patient’s information (age, sex, Masaoka-Koga staging, World Health Organization (WHO) histologic classification, tumor size, and complication such as myasthenia gravis and pure red cell aplasia) from medical records. The study was approved by the Institutional Review Board (IRB) of the Nagasaki University Hospital.
[Results] A total of 30 patients were enrolled in this study. The median age was 62 years old (range, 34-84 years old), patients characteristics were 9 male and 21 female, WHO histologic classification (type A, AB, B1, B2, B3, thymic carcinoma) was 1, 11, 4, 10, 2, 2, and Masaoka-Koga staging I, II, III, IV were 12, 6, 9, 3, respectively. Median tumor size was 47mm (range 11-110 mm). Moreover, complications were 7 myasthenia gravis, 4 acetylcholine receptor antibody-positive (do not confirm diagnossis of myasthenia gravis), 1 pure red cell aplasia, and 1 agranulocytosis. In NGS sequencing, the nonsynonymous mutations of HRAS and NRAS (HRAS Q61R, HRAS G13R, and NRAS Q61K) was detected in three patients. These RAS gene mutations were reported to be pathogenic in various malignancies. Low frequently DNMT3A mutation was detected in the other two patients, however this mutation were not validated in other methods. No genetic alterations were detected in the rest 19 patients.
[Conclusion] The frequency of genetic alterations in thymic epidermal tumors was very low in this study, however, active mutations of RAS oncogene were detected in three patients. Although the RAS are still not established as treatment targets, it should be one of the interacting molecules. Further investigation is required to establish new therapeutic strategy according to the genetic alteration in thymic tumors.
Citation Format: Hiroyuki Yamaguchi, Hiroshi Gyotoku, Hirokazu Taniguchi, Daisuke Sasaki, Midori Shimada, Yosuke Dotsu, Hiroaki Senju, Norihito Kaku, Takaya Ikeda, Minoru Fukuda, Katsunori Yanagihara, Hiroshi Mukae. Genetic analysis of thymoma and thymic carcinoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 1705.
Collapse
Affiliation(s)
| | - Hiroshi Gyotoku
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | | | - Daisuke Sasaki
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | - Midori Shimada
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | - Yosuke Dotsu
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | - Hiroaki Senju
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | - Norihito Kaku
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | - Takaya Ikeda
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | - Minoru Fukuda
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| | | | - Hiroshi Mukae
- Nagasaki University Hospital, Nagasaki-city, Nagasaki, Japan
| |
Collapse
|
25
|
Nishimura F, Uno N, Chiang PC, Kaku N, Morinaga Y, Hasegawa H, Yanagihara K. The Effect of In Vitro Hemolysis on Measurement of Cell-Free DNA. J Appl Lab Med 2019; 4:235-240. [PMID: 31639669 DOI: 10.1373/jalm.2018.027953] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/20/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Hemolysis during blood drawing is a common cause of laboratory artifacts. Although circulating cell-free tumor DNA and fetal DNA are currently measured in routine practice, the effect of in vitro hemolysis on the measurement of cell-free DNA (cfDNA) has not been investigated. When in vitro hemolysis occurs, cellular DNA could be released from damaged white blood cells and reduce the fraction of circulating tumor DNA and fetal DNA. METHODS Blood from healthy individuals was collected and passed through a narrow needle to cause in vitro hemolysis. Plasma was separated before and after mechanical damage, and concentrations of free hemoglobin and cfDNA of 2 reference genes were measured. RESULTS cfDNA of 2 reference genes and free hemoglobin increased after mechanical damage. A clear correlation between cfDNA and free hemoglobin was observed. CONCLUSION cfDNA concentrations are higher in hemolyzed plasma. Therefore, the fraction of circulating tumor DNA and fetal DNA can be underestimated in plasma hemolyzed by inappropriate blood collection techniques.
Collapse
Affiliation(s)
- Fumitaka Nishimura
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan;
| | - Ping-Chia Chiang
- Kaohsiung Medical University School of Medicine, Kaohsiung, Taiwan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
26
|
Kawamoto Y, Kosai K, Yamakawa H, Kaku N, Uno N, Morinaga Y, Hasegawa H, Yanagihara K. Detection of extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae using the MALDI Biotyper Selective Testing of Antibiotic Resistance–β-Lactamase (MBT STAR-BL) assay. J Microbiol Methods 2019; 160:154-156. [DOI: 10.1016/j.mimet.2019.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 03/19/2019] [Accepted: 03/19/2019] [Indexed: 10/27/2022]
|
27
|
Miyazaki T, Fukushima K, Hashiguchi K, Inoue Y, Mihara T, Sawai T, Suyama N, Kobayashi T, Kondo A, Fukuda Y, Harada Y, Sasaki E, Kaku N, Ide S, Takazono T, Saijo T, Kosai K, Morinaga Y, Nakamura S, Yamamoto K, Imamura Y, Izumikawa K, Yanagihara K, Kohno S, Mukae H. Efficacy and safety of cefditoren pivoxil for exacerbations of chronic obstructive pulmonary disease: A prospective multicenter interventional study. J Infect Chemother 2019; 25:702-707. [PMID: 30982729 DOI: 10.1016/j.jiac.2019.03.018] [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: 01/10/2019] [Revised: 02/28/2019] [Accepted: 03/19/2019] [Indexed: 11/28/2022]
Abstract
Oral antibiotic therapy for patients with acute exacerbations of chronic obstructive pulmonary disease (COPD) usually involves an aminopenicillin with clavulanic acid, a macrolide, or a quinolone. To date, however, the clinical efficacy and safety of the oral cephalosporin cefditoren pivoxil has not been evaluated in Japanese patients with acute exacerbations of COPD. We conducted a prospective, multicenter, single arm, interventional study from January 2013 to March 2017 to determine the efficacy and safety of oral administration of 200 mg cefditoren pivoxil three times daily for 7 days in a cohort of 29 eligible patients from 15 hospitals. The mean age (SD) of participants was 73.1 (8.1) years and 28 had a smoking history (the mean [SD] of smoking index, 1426.7 [931.7]). The primary efficacy endpoint was clinical response (cure rate) at test of cure, which was set at 5-10 days after treatment ceased. Of the 23 patients finally analyzed, cure was achieved in 15 (65.2%), while 8 (34.8%) remained uncured. Previous experience of acute exacerbations significantly affected the cure rate: none of the three patients who had at least two prior exacerbations were cured, while 15 of the 20 patients with one or fewer prior exacerbations were cured (p = 0.032). The microbiological eradication rate was 88.9% at test of cure. During treatment, mild pneumonia was reported as an adverse event in one patient (3.4%) but resolved within 10 days of onset. We conclude that cefditoren pivoxil represents a viable alternative for antibiotic therapy in patients with few prior exacerbations.
Collapse
Affiliation(s)
- Taiga Miyazaki
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Kiyoyasu Fukushima
- Division of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Isahaya Hospital, Isahaya, Japan
| | - Kohji Hashiguchi
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Yuichi Inoue
- Department of Respiratory Medicine, Aino Memorial Hospital, Unzen, Japan
| | - Tomo Mihara
- Department of Respiratory Medicine, Izumikawa Hospital, Minamishimabara, Japan
| | - Toyomitsu Sawai
- Department of Respiratory Medicine, Nagasaki Harbor Medical Center, Nagasaki, Japan
| | - Naofumi Suyama
- Department of Respiratory Medicine, Nagasaki Harbor Medical Center, Nagasaki, Japan
| | - Tsutomu Kobayashi
- Department of Respiratory Medicine, Sasebo Chuo Hospital, Sasebo, Japan
| | - Akira Kondo
- Department of Respiratory Medicine, JCHO Isahaya General Hospital, Isahaya, Japan
| | - Yuichi Fukuda
- Department of Respiratory Medicine, Sasebo City General Hospital, Sasebo, Japan
| | - Yosuke Harada
- Department of Respiratory Medicine, National Hospital Organization Ureshino Medical Center, Ureshino, Japan
| | - Eisuke Sasaki
- Department of Respiratory Medicine, National Hospital Organization Ureshino Medical Center, Ureshino, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Shotaro Ide
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Takahiro Takazono
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tomomi Saijo
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Shigeki Nakamura
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kazuko Yamamoto
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Yoshifumi Imamura
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Shigeru Kohno
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| |
Collapse
|
28
|
Okada Y, Kaku N, Kosai K, Uno N, Morinaga Y, Hasegawa H, Yanagihara K. Molecular epidemiology of Clostridioides difficile and risk factors for the detection of toxin gene-positive strains. J Infect Chemother 2019; 25:262-266. [PMID: 30642771 DOI: 10.1016/j.jiac.2018.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/02/2018] [Revised: 11/21/2018] [Accepted: 12/12/2018] [Indexed: 01/05/2023]
Abstract
In this study, we investigated all Clostridioides difficile strains isolated from stool samples in Nagasaki University Hospital between January 2012 and December 2014. Toxin genes (tcdA, tcdB and cdtA/cdtB) were analyzed for multiplex PCR in a total of 213 strains. In the toxin gene-positive strain, PCR ribotyping was conducted using capillary gel electrophoresis-based PCR and the Webribo database. Patients' backgrounds were analyzed by departments, disorders, antimicrobials, and clinical dates. The positive rates of tcdA, tcdB, and cdtA/cdtB genes were 62.9%, 63.4%, and 2.8%, respectively. The most frequent PCR ribotype was 047 (14.1%), followed by 014/0 (11.1%) and 002/0 (8.2%). In univariate analysis, the risk factors for the detection of toxin gene-positive strains in patients were older age (p = 0.0036), over ≥ 65 years old (p = 0.0175), the patients hospitalized at Department of Digestive Surgery (P = 0.0059), higher CRP level (P = 0.0395), and lower albumin level (p = 0.0014). In the multivariate analysis, the risk factor for detection of toxin gene-positive strains was the patients hospitalized at Department of Digestive Surgery (OR; 4.62, 95% CI; 1.18-18.0, p = 0.0274). In this study, the percentage of toxin gene-positive and cdtA/cdtB gene-positive strains was almost the same as that reported in previous studies, but the ribotype was different. In addition, we revealed that the risk factor associated with the detection of toxin gene-positive strains was the patients hospitalized at Department of digestive surgery.
Collapse
Affiliation(s)
- Yuya Okada
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
29
|
Yamakawa H, Kosai K, Akamatsu N, Matsuda J, Kaku N, Uno N, Morinaga Y, Hasegawa H, Tsubouchi T, Kaneko Y, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Molecular and epidemiological analysis of IMP-1 metallo-β-lactamase-producing Klebsiella pneumoniae in a tertiary care hospital in Japan. J Infect Chemother 2019; 25:240-246. [PMID: 30611637 DOI: 10.1016/j.jiac.2018.11.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 11/13/2018] [Accepted: 11/30/2018] [Indexed: 02/05/2023]
Abstract
This study investigated the molecular and phenotypic characteristics of carbapenemase-producing Klebsiella pneumoniae, and identified the risk factors underlying its acquisition. We evaluated K. pneumoniae isolated in Nagasaki University Hospital between January 2009 and June 2015. The presence of carbapenemase genes and plasmid characteristics were investigated. We performed multilocus sequence typing (MLST), and generated a dendrogram based on the results of pulsed-field gel electrophoresis (PFGE) for carbapenemase-producing strains. We also performed a case-control study of patients. Of the 88 K. pneumoniae strains that showed minimum inhibitory concentration ≥1 μg/mL for imipenem and/or meropenem, and that were available from our bacterial collection, 18 had the IMP-type carbapenemase gene, all of which were IMP-1 according to sequencing analysis. Strains included seven different sequence types (STs), of which the most common was ST1471. A dendrogram showed the significant similarity of some strains with relationships in PFGE patterns, STs, and the wards in which they were isolated. Plasmid incompatibility group was similar among the IMP-1 producers. Regarding risk factors, multivariate analysis showed that liver disease and previous uses of carbapenems and anti-fungal drugs were significant factors for the acquisition of IMP-1-producing strains. Our results demonstrate that IMP-1 is a major carbapenemase produced by K. pneumoniae. The PFGE results indicated the possibility of transmission in the hospital. The identified risk factors should be considered for appropriate antibiotic therapy and infection-control measures.
Collapse
Affiliation(s)
- Hiromi Yamakawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan.
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Taishi Tsubouchi
- Department of Bacteriology, Osaka City University Graduate School of Medicine, Osaka, Japan; Research Center for Infectious Disease Sciences, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yukihiro Kaneko
- Department of Bacteriology, Osaka City University Graduate School of Medicine, Osaka, Japan; Research Center for Infectious Disease Sciences, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Taiga Miyazaki
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
30
|
Kaku N, Shimada T, Tabata T, Tagomori H, Abe T, Zhang J, Tsumurai H. Three-dimensional architecture of the ligamentum teres in the human hip joint. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.03.2017.06] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- N. Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - T. Shimada
- Oita College of Judo Therapy and Acupuncture-Moxibustion, Yufu City, Oita, Japan
| | - T. Tabata
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - H. Tagomori
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - T. Abe
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - J.J. Zhang
- Department of Matrix Medicine, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | - H. Tsumurai
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| |
Collapse
|
31
|
Abe T, Kaku N, Tabata T, Tagomori H, Tsumura H. Clinical results of hemiarthroplasty using new bipolar cups for stage 3 or lower osteonecrosis of the femoral head: a retrospective study. Musculoskelet Surg 2018; 102:241-246. [PMID: 29151233 DOI: 10.1007/s12306-017-0524-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 11/09/2017] [Indexed: 06/07/2023]
Abstract
PURPOSE The aim of this study was to evaluate clinical and radiographic findings of stage 3 or lower osteonecrosis of the femoral head (ONFH) with intact acetabular cartilage in patients treated with bipolar hemiarthroplasty (BHA). METHODS A total of 79 hips that underwent BHA for ONFH were included in this study. The average observation period was 7.6 years. Clinical results were evaluated using the Harris hip score. We performed radiographic analysis to assess the migration of the outer cup, the permanent image around the outer cup, and loosening of the stem. RESULTS The total Harris hip score improved from 50 points before surgery to 92 points at final follow-up, while pain improved from 14 points to 36 points. Flexion improved from 94° to 120° and abduction from 27° to 37°. One patient on dialysis showed progress in terms of inward migration, and revision surgery was performed on the patient 14 years after the original surgery. CONCLUSIONS Midterm performance of BHA for stage 3 or lower ONFH at our hospital was good.
Collapse
Affiliation(s)
- T Abe
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| | - N Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan.
| | - T Tabata
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| | - H Tagomori
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| | - H Tsumura
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka Hazamacho, Yufu, Oita, 879-5593, Japan
| |
Collapse
|
32
|
Kosai K, Kaku N, Uno N, Saijo T, Morinaga Y, Imamura Y, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Risk Factors for Acquisition of Fluoroquinolone or Aminoglycoside Resistance in Addition to Carbapenem Resistance in Pseudomonas aeruginosa. Open Microbiol J 2018; 12:321-322. [PMID: 30369989 PMCID: PMC6174612 DOI: 10.2174/1874285801812010321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tomomi Saijo
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshifumi Imamura
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Taiga Miyazaki
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
33
|
Kaku N, Hashiguchi K, Iwanaga Y, Akamatsu N, Matsuda J, Kosai K, Uno N, Morinaga Y, Kitazaki T, Hasegawa H, Miyazaki T, Fukuda M, Izumikawa K, Mukae H, Yanagihara K. Evaluation of FilmArray respiratory panel multiplex polymerase chain reaction assay for detection of pathogens in adult outpatients with acute respiratory tract infection. J Infect Chemother 2018; 24:734-738. [PMID: 29895452 PMCID: PMC7128419 DOI: 10.1016/j.jiac.2018.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 12/09/2017] [Revised: 05/01/2018] [Accepted: 05/16/2018] [Indexed: 12/27/2022]
Abstract
Although viruses are the major pathogen that causes upper respiratory tract infection (URTI) and acute bronchitis, antibiotics have been prescribed. This was a prospective observational study in influenza epidemics that enrolled adult outpatients who visited a hospital with respiratory tract infection symptoms. In this study, we evaluated the usefulness of FilmArray respiratory panel (RP). Fifty patients were enrolled. FilmArray RP detected the pathogens in 28 patients. The common pathogens were influenza virus (n = 14), respiratory syncytial virus (n = 6), and human rhinovirus (n = 6). Of the 14 patients with influenza virus, 6 were negative for the antigen test. The physicians diagnosed and treated the patients without the result of FilmArray in this study. Of the patients with positive FilmArray RP, 9 were treated with antibiotics; however, bacteria were detected in only 3 patients. By implementing FilmArray RP, URTI and acute bronchitis would be precisely diagnosed, and inappropriate use of antibiotics can be reduced.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Kohji Hashiguchi
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Yuki Iwanaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takeshi Kitazaki
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Taiga Miyazaki
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Masaaki Fukuda
- Department of Respiratory Medicine, Japanese Red Cross Nagasaki Genbaku Hospital, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
34
|
Nishimura F, Morinaga Y, Akamatsu N, Matsuda J, Kaku N, Takeda K, Uno N, Kosai K, Hasegawa H, Yanagihara K. Plasmid-Mediated AmpC β-Lactamase and Underestimation of Extended-Spectrum β-Lactamase in Cefepime-Susceptible Elevated-Ceftazidime-MIC Enterobacteriaceae Isolates. Jpn J Infect Dis 2018; 71:281-285. [PMID: 29709981 DOI: 10.7883/yoken.jjid.2017.469] [Citation(s) in RCA: 4] [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: 11/17/2022]
Abstract
Phenotypic detection of extended-spectrum β-lactamase (ESBL) is important for public health and infection control; however, plasmid-mediated AmpC β-lactamases (pAmpCs) can interfere with the ESBL phenotyping. We focused on Enterobacteriaceae strains that were susceptible to cefepime but had a mildly elevated minimum inhibitory concentration (MIC) of ceftazidime and studied the effect of pAmpC on the ESBL phenotyping in this population. Genotyping of ESBL and pAmpC was performed on 528 clinical isolates of Escherichia coli, Klebsiella spp., and Proteus spp. with a ceftazidime MIC of ≥2 μg/mL and cefepime MIC≤8 μg/mL; these isolates were collected at Nagasaki University Hospital from January 2005 to March 2011. In this sample, 145 isolates (27.5%) tested positive for pAmpC (pAmpC group). The concordance rates of phenotypic and genotypic detection of ESBLs were 69.2% in the pAmpC group and 88.8% in the non-pAmpC group (P=0.04). pAmpC was more commonly detected in isolates with non-CTX-M genes (5/53, 9.4%) than in isolates with CTX-M genes (8/121, 6.6%). Our data suggest that the presence of pAmpC increases the false negative detection of ESBL. When ESBL phenotyping is used, the underestimation of the prevalence of ESBL producers should be taken into account.
Collapse
Affiliation(s)
- Fumitaka Nishimura
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Kazuaki Takeda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences
| |
Collapse
|
35
|
Yanagihara K, Akamatsu N, Matsuda J, Kaku N, Katsumata K, Kosai K. Susceptibility of Clostridium species isolated in Japan to fidaxomicin and its major metabolite OP-1118. J Infect Chemother 2018; 24:492-495. [PMID: 29373265 DOI: 10.1016/j.jiac.2017.12.006] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 12/05/2017] [Accepted: 12/13/2017] [Indexed: 12/01/2022]
Abstract
The narrow-spectrum macrocyclic antibiotic fidaxomicin is approved for treatment of Clostridium difficile infection in many countries and is currently under evaluation in Japan for this indication. This study was conducted to evaluate the effects of fidaxomicin and its major metabolite, OP-1118, on Clostridium spp. isolated in Nagasaki University Hospital, Japan. Isolates were cultured and antimicrobial susceptibility analyses performed according to the Clinical Laboratory Standards Institute methods. Ninety-eight isolates were obtained between 2012 and 2015, 50 of C. difficile and 48 of eight other Clostridium spp. Fidaxomicin had the lowest minimum inhibitory concentration (MIC) of the antimicrobials tested against C. difficile, with MIC90 (MIC range) 0.12 μg/mL (0.015-0.25), versus vancomycin MIC90 0.5 μg/mL (0.5), metronidazole MIC90 0.5 μg/mL (0.12-0.5), and OP-1118 MIC90 4.0 μg/mL (0.5-4.0). Fidaxomicin and OP-1118 each had a similar spectrum of activity against the other Clostridium spp. C. butyricum and the 29 fidaxomicin- and OP-1118-susceptible C. perfringens isolates had the lowest MIC values, and C. bolteae and C. hathewayi higher. All the C. ramosum isolates (n = 6) and one of 30 C. perfringens isolates had low susceptibility to fidaxomicin and OP-1118 (i.e., MIC >64 μg/mL). In summary, this study showed that fidaxomicin was active against a number of Clostridium spp., including C. difficile. Fidaxomicin was generally more effective than its major metabolite OP-1118, but both showed a similar spectrum of activity, suggesting that OP-1118 contributes to the antimicrobial activity of fidaxomicin. These findings were broadly in accordance with those of similar studies conducted in other settings.
Collapse
Affiliation(s)
- Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Kiyomitsu Katsumata
- Department of Drug Discovery Research, Astellas Pharma, Inc., 21, Miyukigaoka, Tsukuba, Ibaraki, Japan.
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| |
Collapse
|
36
|
Yamakawa H, Kosai K, Kawamoto Y, Akamatsu N, Matsuda J, Kaku N, Uno N, Morinaga Y, Hasegawa H, Yanagihara K. Performance evaluation of BD Phoenix™, an automated microbiology system, for the screening of IMP-producing Enterobacteriaceae. J Microbiol Methods 2017; 145:47-49. [PMID: 29258740 DOI: 10.1016/j.mimet.2017.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 12/15/2017] [Accepted: 12/15/2017] [Indexed: 10/18/2022]
Abstract
BD Phoenix™ is an automated bacterial identification and susceptibility testing system. Here, its performance in screening IMP-producing Enterobacteriaceae was evaluated. The system identified 97.8% of IMP producers as being nonsusceptible to imipenem or meropenem, which was higher than that identified by the broth microdilution method (91.3%, imipenem; 41.3%, meropenem).
Collapse
Affiliation(s)
- Hiromi Yamakawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan.
| | - Yasuhide Kawamoto
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
37
|
Kaku N, Morinaga Y, Takeda K, Kosai K, Uno N, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Efficacy and pharmacokinetics of ME1100, a novel optimized formulation of arbekacin for inhalation, compared with amikacin in a murine model of ventilator-associated pneumonia caused by Pseudomonas aeruginosa. J Antimicrob Chemother 2017; 72:1123-1128. [PMID: 27999047 DOI: 10.1093/jac/dkw517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/02/2016] [Indexed: 01/01/2023] Open
Abstract
Background Arbekacin is an aminoglycoside that shows strong antimicrobial activity against Gram-positive bacteria, including MRSA, as well as Pseudomonas aeruginosa . The therapeutic effectiveness of arbekacin is directly related to C max at the infection site. To maximize drug delivery to the respiratory tract and minimize the systemic toxicity, arbekacin optimized for inhalation, ME1100, is under development. In this study, we investigated the efficacy and pharmacokinetics of ME1100 in a murine model of ventilator-associated pneumonia caused by P. aeruginosa by using a customized investigational nebulizer system. Methods The mice were treated for 5 min, once daily, with placebo, 3, 10 or 30 mg/mL ME1100 or 30 mg/mL amikacin. Results In the survival study, the survival rate was significantly improved in the 10 and 30 mg/mL ME1100 treatment groups compared with that in the placebo group. The number of bacteria in the lungs was significantly lower in the 30 mg/mL ME1100 treatment group at 6 h after the initial treatment, compared with all other groups. In the pharmacokinetic study, the C max in the 30 mg/mL ME1100 treatment group in the epithelial lining fluid (ELF) and plasma was 31.1 and 1.2 mg/L, respectively. Furthermore, we compared the efficacy of ME1100 with that of amikacin. Although there were no significant differences in ELF and plasma concentrations between 30 mg/mL of ME1100 and 30 mg/mL of amikacin, ME1100 significantly improved the survival rate compared with amikacin. Conclusions The results of our study demonstrated the in vivo effectiveness of ME1100 and its superiority to amikacin.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Kazuaki Takeda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan.,Second Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Taiga Miyazaki
- Second Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Hiroshi Mukae
- Second Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki city, Nagasaki, Japan
| |
Collapse
|
38
|
Higashino M, Murata M, Morinaga Y, Akamatsu N, Matsuda J, Takeda K, Kaku N, Kosai K, Uno N, Hasegawa H, Yanagihara K. Fluoroquinolone resistance in extended-spectrum β-lactamase-producing Klebsiella pneumoniae in a Japanese tertiary hospital: silent shifting to CTX-M-15-producing K. pneumoniae. J Med Microbiol 2017; 66:1476-1482. [PMID: 28893357 DOI: 10.1099/jmm.0.000577] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 10/18/2022] Open
Abstract
PURPOSE Fluoroquinolone resistance (FQ-r) in extended-spectrum β-lactamase (ESBL) producers is an urgent health concern in countries where ESBL-producing K. pneumoniae (ESBL-Kpn) is prevalent. We investigated FQ-r in Japan where ESBL-Kpn is less prevalent. METHODOLOGY Clinical ESBL-Kpn isolates from 2011 to 2013 were collected in Nagasaki University Hospital. The ESBL genotypes included CTX-M-15, and the mechanisms of FQ-r through plasmid-mediated quinolone resistance (PMQR) and mutations in quinolone resistance-determining regions (QRDRs) were examined. Clonality was analysed by enterobacterial repetitive intergenic consensus (ERIC)-PCR and multi-locus sequence typing was performed on selected isolates.Results/Key findings. Thirty ESBL-Kpn isolates, including seven levofloxacin-resistant isolates, were obtained from different patients. An increase in CTX-M-15-producing strains was observed during the study period (0/11 in 2011, 3/8 in 2012, and 5/11 in 2013). PMQR was detected in 53.3 % of the isolates and aac-(6')-Ib-cr was the most common (36.7 %). ST15 was observed in 60.0 % of the isolates, and for the most predominant ERIC-PCR profiles, 62.5 % of the isolates possessed the CTX-M-15 genotype and 71.4 % were levofloxacin-resistant. Levofloxacin-resistance was significantly more common in CTX-M-15 isolates (62.5 %) compared to non-CTX-M-15 isolates (9.1 %). Three QRDR mutations and aac(6')-Ib-cr, but not qnrB and qnrS, were significantly enriched in the CTX-M-15 isolates (100.0 %) compared to the non-CTX-M-15 isolates (13.6 %). CONCLUSION Cumulatively, these results indicate that the epidemic strain, the CTX-M-15-producing K. pneumoniae ST15, is covertly spreading even when ESBL producers are not prevalent. Monitoring these epidemic strains and ESBLs in general is important for quickly identifying health crises and minimizing future risks from FQ-r ESBL-Kpn.
Collapse
Affiliation(s)
- Masashi Higashino
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Mika Murata
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Norihiko Akamatsu
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Junichi Matsuda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Kazuaki Takeda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| |
Collapse
|
39
|
Okada Y, Uno N, Sato S, Mori S, Sasaki D, Kaku N, Kosai K, Morinaga Y, Hasegawa H, Yanagihara K. Strong influence of human leukocyte antigen-DP variants on response to hepatitis B vaccine in a Japanese population. Vaccine 2017; 35:5662-5665. [PMID: 28882445 DOI: 10.1016/j.vaccine.2017.08.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 06/20/2017] [Revised: 08/14/2017] [Accepted: 08/19/2017] [Indexed: 12/17/2022]
Abstract
Genome-wide association studies (GWASs) have reported that human leukocyte antigen (HLA) variants are associated with chronic hepatitis B, spontaneous hepatitis B virus (HBV) clearance, and response to hepatitis B vaccine. Single nucleotide polymorphisms (SNPs) in HLA-DP (rs9277535 and rs3077) and HLA-DQ (rs2856718 and rs7453920) have been repeatedly associated with chronic hepatitis B and spontaneous HBV clearance. However, the data on the SNPs associated with response to hepatitis B vaccine are inconclusive. The objective of this study was to determine whether these four HLA SNPs that have been identified as risk loci for chronic HBV infection are associated with response to hepatitis B vaccine in a Japanese population. We enrolled 278 medical students who received hepatitis B vaccination and measured anti-hepatitis B surface (HBs) antibody titers 1month after a three-dose vaccination series. We found that rs9277535 and rs3077 in HLA-DP were strongly associated with response to hepatitis B vaccine (odds ratio [OR]=0.31 and 0.32, P=0.004 and 0.010, respectively). These two SNPs were significantly associated with anti-HBs titers in an allele-dependent manner. On the other hand, rs2856718 and rs7453920 in HLA-DQ were not associated with response to hepatitis B vaccine. These results indicate that rs9277535 and rs3077 in HLA-DP are the major determinants of response to hepatitis B vaccine, whereas rs2856718 and rs7453920 in HLA-DQ have little effect on the immune response to hepatitis B vaccine.
Collapse
Affiliation(s)
- Yuya Okada
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Shuntaro Sato
- Clinical Research Center, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Sayaka Mori
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| |
Collapse
|
40
|
Takeda K, Kaku N, Morinaga Y, Kosai K, Uno N, Imamura Y, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Tedizolid inhibits MUC5AC production induced by methicillin-resistant Staphylococcus aureus in human airway epithelial cells. J Infect Chemother 2017; 23:598-603. [PMID: 28729052 DOI: 10.1016/j.jiac.2017.04.015] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/14/2017] [Accepted: 04/28/2017] [Indexed: 10/19/2022]
Abstract
The innate immune system plays an important role in early immunity against respiratory tract infection. Although airway epithelial cells produce mucus to eliminate pathogens and irritants, hypersecretion of mucus is harmful for the host as it may cause airway obstruction and inhibit influx of antimicrobial agents. It has been reported that several antimicrobial agents have an immunomodulatory effect in vitro and in vivo, but little is known about whether tedizolid, a novel oxazolidinone, can modulate immune responses. In this study, we evaluated whether tedizolid can suppress MUC5AC production in human airway epithelial cells stimulated by methicillin-resistant Staphylococcus aureus (MRSA). Compared with the control, tedizolid significantly inhibited MUC5AC protein production and mRNA overexpression at concentrations of both 2 and 10 μg/mL (representative of trough and peak concentrations in human epithelial lining fluid). Among the mitogen-activated protein kinase inhibitors tested, only extracellular signal-regulated protein kinase 1/2 (ERK1/2) phosphorylation was inhibited by tedizolid as indicated by western blot analysis. These results indicate that tedizolid inhibits the overproduction of MUC5AC protein by inhibiting phosphorylation of ERK1/2. This study revealed that tedizolid suppresses excessive mucin production in human airway epithelial cells. The immunomodulatory effect of tedizolid may improve outcomes in patients with severe respiratory infectious diseases caused by MRSA.
Collapse
Affiliation(s)
- Kazuaki Takeda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan; Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Yoshifumi Imamura
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Taiga Miyazaki
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| |
Collapse
|
41
|
Yanagihara K, Watanabe A, Aoki N, Matsumoto T, Yoshida M, Sato J, Wakamura T, Sunakawa K, Kadota J, Kiyota H, Iwata S, Kaku M, Hanaki H, Ohsaki Y, Fujiuchi S, Takahashi M, Takeuchi K, Takeda H, Ikeda H, Miki M, Nakanowatari S, Takahashi H, Utagawa M, Nishiya H, Kawakami S, Morino E, Takasaki J, Mezaki K, Chonabayashi N, Tanaka C, Sugiura H, Goto H, Saraya T, Kurai D, Katono Y, Inose R, Niki Y, Takuma T, Kudo M, Ehara S, Sato Y, Tsukada H, Watabe N, Honma Y, Mikamo H, Yamagishi Y, Nakamura A, Ohashi M, Seki M, Hamaguchi S, Toyokawa M, Fujikawa Y, Mitsuno N, Ukimura A, Miyara T, Nakamura T, Mikasa K, Kasahara K, Ui K, Fukuda S, Nakamura A, Morimura M, Yamashita M, Takesue Y, Wada Y, Sugimoto K, Kusano N, Nose M, Mihara E, Kuwabara M, Doi M, Watanabe Y, Tokuyasu H, Hino S, Negayama K, Mukae H, Kawanami T, Ota T, Fujita M, Honda J, Hiramatsu K, Aoki Y, Fukuoka M, Magarifuchi H, Nagasawa Z, Kaku N, Fujita J, Higa F, Tateyama M. Nationwide surveillance of bacterial respiratory pathogens conducted by the surveillance committee of Japanese Society of Chemotherapy, the Japanese Association for Infectious Diseases, and the Japanese Society for Clinical Microbiology in 2012: General view of the pathogens' antibacterial susceptibility. J Infect Chemother 2017; 23:587-597. [PMID: 28669567 DOI: 10.1016/j.jiac.2017.05.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 04/03/2017] [Revised: 05/16/2017] [Accepted: 05/31/2017] [Indexed: 10/19/2022]
Abstract
The nationwide surveillance on antimicrobial susceptibility of bacterial respiratory pathogens from the patients in Japan was conducted by Japanese Society of Chemotherapy, Japanese association for infectious diseases and Japanese society for Clinical Microbiology in 2012. The isolates were collected from clinical specimens obtained from well-diagnosed adult patients with respiratory tract infections during the period between January and December in 2012 by three societies. Antimicrobial susceptibility testing was conducted at the central reference laboratory according to the method recommended by Clinical Laboratory Standard Institutes. Susceptibility testing was evaluated in 1236 strains (232 Staphylococcus aureus, 225 Streptococcus pneumoniae, 16 Streptococcus pyogenes, 231 Haemophilus influenzae, 147 Moraxella catarrhalis, 167 Klebsiella pneumoniae and 218 Pseudomonas aeruginosa). Ratio of methicillin-resistant S. aureus was 51.3%, and those of penicillin-intermediate S. pneumoniae was 0.4%. Among H. influenzae, 5.6% of them were found to be β-lactamase-producing ampicillin-resistant strains, and 37.2% to be β-lactamase-non-producing ampicillin-resistant strains. Extended spectrum β-lactamase-producing K. pneumoniae and multi-drug resistant P. aeruginosa with metallo β-lactamase were 4.2% and 3.2%, respectively. Continuous national surveillance is important to determine the actual situation of the resistance shown by bacterial respiratory pathogens to antimicrobial agents.
Collapse
Affiliation(s)
- Katsunori Yanagihara
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan; Nagasaki University School of Medicine, Nagasaki, Japan.
| | - Akira Watanabe
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Nobuki Aoki
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan; Shinrakuen Hospital, Niigata, Japan
| | - Tetsuya Matsumoto
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Masaki Yoshida
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Junko Sato
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Tomotaro Wakamura
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Keisuke Sunakawa
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Junichi Kadota
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan; Oita University Faculty of Medicine, Oita, Japan
| | - Hiroshi Kiyota
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | - Satoshi Iwata
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan; Keio University Hospital, Tokyo, Japan
| | - Mitsuo Kaku
- The Surveillance Committee of Japanese Society of Chemotherapy (JSC), The Japanese Association for Infectious Diseases (JAID), and The Japanese Society for Clinical Microbiology (JSCM), Tokyo, Japan
| | | | | | - Satoru Fujiuchi
- National Hospital Organization Asahikawa Medical Center, Hokkaido, Japan
| | - Manabu Takahashi
- National Hospital Organization Asahikawa Medical Center, Hokkaido, Japan
| | | | | | | | - Makoto Miki
- Japanese Red Cross Sendai Hospital, Miyagi, Japan
| | | | | | | | | | | | - Eriko Morino
- National Center for Global Health and Medicine, Tokyo, Japan
| | - Jin Takasaki
- National Center for Global Health and Medicine, Tokyo, Japan
| | - Kazuhisa Mezaki
- National Center for Global Health and Medicine, Tokyo, Japan
| | | | - Chie Tanaka
- St. Luke's International Hospital, Tokyo, Japan
| | | | | | | | | | | | | | | | | | - Makoto Kudo
- Yokohama City University Hospital, Kanagawa, Japan
| | | | - Yoshimi Sato
- Yokohama City University Hospital, Kanagawa, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Takahito Nakamura
- Japan Community Health Care Organization Hoshigaoka Medical Center, Osaka, Japan
| | - Keiichi Mikasa
- Center for Infectious Diseases, Nara Medical University, Nara, Japan
| | - Kei Kasahara
- Center for Infectious Diseases, Nara Medical University, Nara, Japan
| | - Koji Ui
- Center for Infectious Diseases, Nara Medical University, Nara, Japan
| | | | | | | | | | | | - Yasunao Wada
- Hyogo College of Medicine Hospital, Hyogo, Japan
| | | | | | | | | | | | - Masao Doi
- Hiroshima Prefectural Hospital, Hiroshima, Japan
| | | | | | | | | | - Hiroshi Mukae
- Hospital of the University of Occupational and Environmental Health Japan, Fukuoka, Japan; Nagasaki University School of Medicine, Nagasaki, Japan
| | - Toshinori Kawanami
- Hospital of the University of Occupational and Environmental Health Japan, Fukuoka, Japan
| | - Toshiyuki Ota
- Hospital of the University of Occupational and Environmental Health Japan, Fukuoka, Japan
| | - Masaki Fujita
- Faculty of Medicine, Fukuoka University, Fukuoka, Fukuoka, Japan
| | | | | | - Yosuke Aoki
- Saga University, School of Medicine, Saga, Japan
| | - Mami Fukuoka
- Saga University, School of Medicine, Saga, Japan
| | | | | | - Norihito Kaku
- Nagasaki University School of Medicine, Nagasaki, Japan
| | - Jiro Fujita
- Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Futoshi Higa
- Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Masao Tateyama
- Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| |
Collapse
|
42
|
Kosai K, Kaku N, Uno N, Saijo T, Morinaga Y, Imamura Y, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Risk Factors for Acquisition of Fluoroquinolone or Aminoglycoside Resistance in Addition to Carbapenem Resistance in Pseudomonas Aeruginosa. Open Microbiol J 2017; 11:92-97. [PMID: 28694882 PMCID: PMC5481610 DOI: 10.2174/1874285801711010092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 02/10/2017] [Revised: 03/31/2017] [Accepted: 04/26/2017] [Indexed: 11/22/2022] Open
Abstract
Background: Carbapenems, fluoroquinolones (FQs), and aminoglycosides (AGs) are key drugs for treating Pseudomonas aeruginosa infections, and accumulation of drug resistances make antibiotic therapy difficult. Methods: We evaluated 169 patients with imipenem (IPM)-resistant P. aeruginosa and compared patient background and microbiological characteristics between groups with or without FQ resistance. Similar analyses were performed for AG. Results: Of the 169 IPM-resistant strains, 39.1% showed resistance to FQs and 7.1% to AGs. The frequency of exposure to FQs within 90 days previously was higher in the group with FQ resistance (45.5%) than in the group without FQ resistance (13.6%). Similarly, 33.3% of patients in the group with AG resistance had been previously administered AGs, higher than the 7.6% of patients without AG resistance. Frequencies of metallo-β-lactamase (MBL) production were higher in the group with FQ or AG resistance (16.7% or 33.3%) than in the group without FQ or AG resistance (2.9% or 6.4%). Multivariate analyses showed exposures to FQs or AGs were related to the respective resistances. MBL production was a common factor for resistance to FQs or AGs, in addition to IPM-resistant P. aeruginosa. Conclusion: As well as promoting appropriate use of antibiotics, MBL production should be detected as a target of intervention for infection control.
Collapse
Affiliation(s)
- Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Tomomi Saijo
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshifumi Imamura
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Taiga Miyazaki
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
43
|
Ota K, Kaku N, Kosai K, Uno N, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Solithromycin Inhibits MUC5AC Production Induced by Streptococcus pneumoniae and Haemophilus influenzae in Human Airway Epithelial Cells. Open Forum Infect Dis 2017. [DOI: 10.1093/ofid/ofx163.465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
44
|
Kawamoto Y, Morinaga Y, Kimura Y, Kaku N, Kosai K, Uno N, Hasegawa H, Yanagihara K. TNF-α inhibits the growth of Legionella pneumophila in airway epithelial cells by inducing apoptosis. J Infect Chemother 2016; 23:51-55. [PMID: 27865699 DOI: 10.1016/j.jiac.2016.09.010] [Citation(s) in RCA: 12] [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: 06/21/2016] [Revised: 09/21/2016] [Accepted: 09/28/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND TNF-α plays an important role in the pathogenesis of Legionella pneumophila (Lp)-induced pneumonia. Patients undergoing anti-TNF-α therapy are at an increased risk of Lp infection. Lp infects both phagocytic and non-phagocytic cells such as airway epithelial cells; however, the role of TNF-α in airway epithelial cells is unknown. METHODS Human airway epithelial cell line NCI-H292 was infected with Lp NUL1 strain. After infection, both intracellular growth of Lp and cell death were evaluated after treating the cells with or without TNF-α. Apoptosis was examined by performing activated caspase-3/7 staining and by using a pan-caspase inhibitor. RESULTS Lp infected and replicated in NCI-H292 cells in a time-dependent manner, and TNF-α treatment of Lp-infected NCI-H292 cells inhibited Lp replication. Inhibitory effects of TNF-α on Lp replication were suppressed after treatment with a TNF-α-neutralizing antibody. Lp infection increased extracellular lactate dehydrogenase levels and decreased the number of living cells. Increased number of Lp-infected NCI-H292 cells showed caspase-3/7 activation, indicating they underwent apoptosis. TNF-α treatment inhibited Lp replication by increasing the apoptosis of NCI-H292 cells. CONCLUSIONS Thus, our results suggested that airway epithelial cells were involved in the pathogenesis of Lp infection and that TNF-α played a protective role by inhibiting the intracellular replication of Lp and by increasing the apoptosis of Lp-infected airway epithelial cells. However, Lp infection should be investigated further in patients undergoing anti-TNF-α therapy who develop pneumonia.
Collapse
Affiliation(s)
- Yasuhide Kawamoto
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan.
| | - Yumiko Kimura
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 851-2128, Japan
| |
Collapse
|
45
|
Matsumoto N, Mori S, Hasegawa H, Sasaki D, Mori H, Tsuruda K, Imanishi D, Imaizumi Y, Hata T, Kaku N, Kosai K, Uno N, Miyazaki Y, Yanagihara K. Simultaneous screening for JAK2 and calreticulin gene mutations in myeloproliferative neoplasms with high resolution melting. Clin Chim Acta 2016; 462:166-173. [PMID: 27693531 DOI: 10.1016/j.cca.2016.09.023] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 09/25/2016] [Accepted: 09/27/2016] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Recently, novel calreticulin (CALR) mutations were discovered in Janus kinase 2 (JAK2) non-mutated myelofibrosis (PMF) and essential thrombocythemia (ET) cases, with a frequency of 60-80%. We examined clinical correlations and CALR mutation frequency in our myeloproliferative neoplasms (MPN) cases, and introduce an effective test method for use in clinical practice. METHODS We examined 177 samples previously investigated for the JAK2 mutation for differential diagnosis of MPN. JAK2 and CALR mutations were analyzed using melting curve analysis and microchip electrophoresis, respectively. Next, we constructed a test for simultaneous screening of the JAK2 and CALR mutations utilizing high resolution melting (HRM). RESULTS Among 99 MPN cases, 60 possessed the JAK2 mutation alone. Of the 39 MPN cases without the JAK2 mutation, 14 were positive for the CALR mutation, all of which were ET. Using our novel screening test for the JAK2 and CALR mutations by HRM, the concordance rate of conventional analysis with HRM was 96% for the JAK2 mutation and 95% for the CALR mutation. CONCLUSION Our novel simultaneous screening test for the JAK2 and CALR gene mutations with HRM is useful for diagnosis of MPN.
Collapse
Affiliation(s)
- Nariyoshi Matsumoto
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Sayaka Mori
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Daisuke Sasaki
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Hayato Mori
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Kazuto Tsuruda
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | | | | | - Tomoko Hata
- Department of Hematology, Nagasaki University Hospital, Nagasaki, Japan; Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kousuke Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasushi Miyazaki
- Department of Hematology, Nagasaki University Hospital, Nagasaki, Japan; Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan; Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
46
|
Yanagihara K, Sasaki D, Akamatsu N, Kaku N, Kosai K. [Ebola Virus Disease (Ebola Hemorrhagic Fever)]. Rinsho Byori 2016; 64:1025-1032. [PMID: 30609455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The Ebola virus is a single-stranded negative sense RNA virus belonging to the filovirus family. The Ebo- ]a virus causes Ebola virus disease (EVD). EVD is characterized by fever and malaise, muscle pain, and abnormal blood clotting. The mortality rate associated with EVD is very high, at 88%. In the worldwide outbreak in 2014, the epidemic of EVD started in Guinea and expanded to western Africa. Thereafter, cases of infection with the Ebola virus spread around the world, especially Europe and America. EVD is a zoono- sis. It is considered that the natural host of Ebola virus is a bat, and it causes a fatal clinical condition in go- rillas and chimpanzees as well as humans. People were infected by touching body fluids of blood, secretions, vomit, and other discharges from patients with EVD. Since the numbers of Japanese who work overseas and foreigners who visit Japan are increasing, it is necessary to establish the diagnosis of and medical treatment system for EVD in Japan. In this paper, we mainly describe the laboratory-based testing and risk manage- ment of Ebola hemorrhagic fever in Japanese hospitals. [Review].
Collapse
|
47
|
Abstract
PURPOSE To compare the past and present bipolar hip arthroplasty (BHA) models in terms of balance between pull-out strength and oscillation angle (OA). METHODS The pull-out strength and OA of 8 BHA models were compared: UPF-II, IBC, and Tandem XLPE (Smith & Nephew); Ringloc x (Biomet); J-FX (DePuy); Bipolar (Nakashima Medical); Multipolar (Zimmer); and Centrax (Stryker). RESULTS Respectively for the UPF-II, IBC, Tandem, Ringloc, J-FX, Nakashima Bipolar, Multipolar, and Centrax, the mean pull-out strength was 2219 N, 3303 N, 1503 N, 951 N, 1453 N, 1856 N, 1536 N, and 753 N, whereas the mean OA was 54.2°, 53.8°, 64.0°, 73.2°, 63.0°, 65.4°, 55.6°, and 75.4°. The OA was lower in the integrated types. For pull-out strength of the locking mechanism, the integrated type (IBC and Nakashima) was stronger than the metal or polyethylene ring-lock type (all others). The pull-out strength and OA were negatively correlated (r= -0.881, p=0.007), and the balance between the 2 varied for different models. CONCLUSION There is a trade-off between the pullout strength and OA; optimal balance between the 2 should be based on each patient's need.
Collapse
Affiliation(s)
- N Kaku
- Department of Orthopaedic Surgery, Faculty of Medicine, Oita University, Yufu City, Oita, Japan
| | | | | |
Collapse
|
48
|
Mori S, Morinaga Y, Nishimura F, Murata M, Umihata S, Sasaki D, Kaku N, Kosai K, Uno N, Taguchi J, Hasegawa H, Miyazaki Y, Yanagihara K. [Diagnostic Utilities of an Automated and Standardized DNA Quantification during Cytomegalovirus Monitoring]. Rinsho Byori 2016; 64:881-886. [PMID: 30609324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The accurate and standardized diagnosis of cytomegalovirus (CMV) infection is important for immunocom- promised patients. We prospectively evaluated the performance of an automated and standardized real-time polymerase chain reaction (PCR) -based DNA quantification for the detection of CMV. The results of PCR- based analysis were also compared with pp65 antigenemia (Ag) assay in the clinical records. The PCR- based analysis of 144 plasma samples from 26 patients with hematologic diseases detected CMV in 69 (48.0%) samples (range, <150-1.28 X 10⁴ copies/mL) while Ag detected CMV in 32(22.2%) samples (range, 1-37/50,000 cells). The number of concordant samples between the two tests was 95(66.0%). There were nine patients who had an Ag-positive period sandwiched by Ag-negative periods and, in all these patients, the Ag-positive period was completely covered by PCR-positive period. These results suggest that PCR can detect CMV more sensitively than Ag. The automated and standardized PCR for detection of CMV can support the appropriate management in patients with risks of CMV infection. [Original].
Collapse
|
49
|
Uno N, Araki N, Kaku N, Kosai K, Hasegawa H, Yanagihara K. Clinical application of a ligation-independent pathway of multiplex ligation-dependent probe amplification for the determination of quinolone susceptibility of Streptococcus pneumoniae. J Microbiol Methods 2016; 128:13-15. [PMID: 27343683 DOI: 10.1016/j.mimet.2016.06.024] [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: 04/11/2016] [Revised: 06/20/2016] [Accepted: 06/21/2016] [Indexed: 10/21/2022]
Abstract
We previously uncovered a ligation-independent pathway of multiplex ligation-dependent probe amplification (MLPA) through which products of MLPA could be amplified without both hybridization and ligation reactions. Here, we utilized this pathway to detect an antibiotic resistance mutation of quinolones in Streptococcus pneumoniae.
Collapse
Affiliation(s)
- Naoki Uno
- Department of Laboratory Medicine, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Nobuko Araki
- Department of Laboratory Medicine, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University, Graduate School of Biomedical Sciences, Nagasaki, Japan
| |
Collapse
|
50
|
Kaku N, Morinaga Y, Takeda K, Kosai K, Uno N, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. Antimicrobial and immunomodulatory effects of tedizolid against methicillin-resistant Staphylococcus aureus in a murine model of hematogenous pulmonary infection. Int J Med Microbiol 2016; 306:421-8. [PMID: 27259840 DOI: 10.1016/j.ijmm.2016.05.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 02/02/2016] [Revised: 05/09/2016] [Accepted: 05/12/2016] [Indexed: 02/07/2023] Open
Abstract
Tedizolid (TZD) is a second-generation oxazolidinone and demonstrates potent in-vitro activity against multidrug-resistant Gram-positive bacteria. Phase III studies in patients with acute bacterial skin and skin structure infections (ABSSSI) have demonstrated the non-inferiority of TZD to linezolid (LZD). However, there are only a few studies that show the effect of TZD in pulmonary infections. In this study, we investigated the effect of TZD in a murine model of hematogenous pulmonary infection caused by methicillin-resistant Staphylococcus aureus (MRSA). The mice were treated either twice daily with saline (control), 25mg/kg of vancomycin (low-VAN), 110mg/kg of vancomycin (high-VAN), 120mg/kg of LZD or once daily with 20mg/kg of TZD. As compared to the control, the low- and high-VAN treatment groups, LZD and TZD significantly improved the survival rate, reduced the bacterial count in the lungs. Furthermore, TZD decreased the area of central bacterial colony zone (CBCZ) at 36h post-inoculation, compared with the control. In addition, we investigated the immunomodulatory effect of TZD by evaluating the plasma concentrations of the inflammatory cytokines. Although there were no significant differences in the bacterial count in the lungs amongst the drugs at 26h post-inoculation, TZD and LZD significantly improved the plasma concentrations of TNF-alpha, IL-6 and MIP-2, in comparison with the control. In this study, both TZD and LZD demonstrated antimicrobial and immunomodulatory efficacy in a murine model of hematogenous pulmonary infection caused by MRSA.
Collapse
Affiliation(s)
- Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan.
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Kazuaki Takeda
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Second Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Kosuke Kosai
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Taiga Miyazaki
- Second Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan; Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Koichi Izumikawa
- Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Hiroshi Mukae
- Second Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, Japan
| |
Collapse
|