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Takei S, Teramoto K, Fujimura J, Fujiwara M, Suzuki M, Fukui Y, Sekiguchi Y, Kawakami T, Chonan M, Wakita M, Horiuchi Y, Miida T, Naito T, Kirikae T, Tada T, Tabe Y. Isolation and identification of Wickerhamiella tropicalis from blood culture by MALDI-MS. Front Cell Infect Microbiol 2024; 14:1361432. [PMID: 38510957 PMCID: PMC10953818 DOI: 10.3389/fcimb.2024.1361432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 02/20/2024] [Indexed: 03/22/2024] Open
Abstract
Wickerhamiella is a genus of budding yeast that is mainly isolated from environmental samples, and 40 species have been detected. The yeast isolated from human clinical samples usually only contain three species: W. infanticola, W. pararugosa and W. sorbophila. In this study, we isolated W. tropicalis from a blood sample of a six-year-old female with a history of B-cell precursor lymphoblastic leukemia in Japan in 2022. Though the strain was morphologically identified as Candida species by routine microbiological examinations, it was subsequently identified as W. tropicalis by sequencing the internal transcribed spacer (ITS) of ribosomal DNA (rDNA). The isolate had amino acid substitutions in ERG11 and FKS1 associated with azole and echinocandin resistance, respectively, in Candida species and showed intermediate-resistant to fluconazole and micafungin. The patient was successfully treated with micafungin. Furthermore, matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) detected three novel peaks that are specific for W. tropicalis, indicating that MALDI-MS analysis is useful for rapid detection of Wickerhamiella species in routine microbiological examinations.
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Affiliation(s)
- Satomi Takei
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of MALDI-TOF MS Practical Application Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kanae Teramoto
- Department of MALDI-TOF MS Practical Application Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Analytical & Measurement Instruments Division, Shimadzu Corporation, Kyoto, Japan
| | - Junya Fujimura
- Department of Pediatrics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Megumi Fujiwara
- Department of Pediatrics, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Mai Suzuki
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yukiko Fukui
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuji Sekiguchi
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Takaaki Kawakami
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Masayoshi Chonan
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Mitsuru Wakita
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Yuki Horiuchi
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Naito
- Department of MALDI-TOF MS Practical Application Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Teruo Kirikae
- Department of MALDI-TOF MS Practical Application Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Microbiome Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Tatsuya Tada
- Department of Microbiology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoko Tabe
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of MALDI-TOF MS Practical Application Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Ihara H, Kondo K, Muto Y, Haba M, Nakazawa H, Handoh T, Arai Y, Shibayama K, Sumiyoshi I, Ochi Y, Watanabe J, Takei S, Nakamura A, Fujimoto Y, Togo S, Takahashi K. The epidemiology of pulmonary Mycobacterium abscessus species in Japanese population. J Infect Chemother 2024:S1341-321X(24)00053-9. [PMID: 38432559 DOI: 10.1016/j.jiac.2024.02.018] [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: 11/05/2023] [Revised: 12/20/2023] [Accepted: 02/18/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND Mycobacterium abscessus species (MABS) is now a most virulent rapidly growing mycobacteria (RGM), and the rapid increase of MABS was recently observed worldwide, including in Japan. Thus, we gathered evidences of the presence of pulmonary MABS in Japanese population from Japanese articles. METHODS we searched studies that addressed the isolation of pulmonary non-tuberculous Mycobacteria (NTM) or MABS from clinical respiratory specimens in Japan. RESULTS the ratio of MABS to NTM was 3.04% (95% confidence interval [CI]: 2.51-3.68), found using the meta-analysis of single proportions. The estimated mean age of patients infected with MABS was 67.72 years (95% CI: 65.41-70.02), found using the meta-analysis of single means. The estimated proportion of females, never smoker, and the co-infection with Mycobacterium avium complex (MAC) was 66.75% (95% CI: 59.23-73.50), 67.57% (95% CI: 62.43-72.32), and 36.74% (95% CI: 25.30-49.90), respectively. The characteristics of MABS in Japan were considerably different from that in Europe and United States from the perspective of age, gender, and complications, wherein the patients in these countries tended to be younger, had lower number of females, and had more occurrences of hereditary diseases, including cystic fibrosis (CF). CONCLUSION we hypothesized that the characteristics of MABS in the Japanese were involved in those of non-CF MABS, and the distribution of gender and age of MABS were similar to that of MAC in the Japanese.
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Affiliation(s)
- Hiroaki Ihara
- Department of Respiratory Medicine, Tokyo, Japan; Koto Hospital, Tokyo, Japan.
| | | | - Yuki Muto
- Department of Respiratory Medicine, Tokyo, Japan; Koto Hospital, Tokyo, Japan
| | - Manami Haba
- Department of Respiratory Medicine, Tokyo, Japan
| | | | - Tetsuya Handoh
- Department of Clinical Laboratory Medicine, Tokyo, Japan
| | - Yuta Arai
- Department of Respiratory Medicine, Tokyo, Japan
| | | | | | - Yusuke Ochi
- Department of Respiratory Medicine, Tokyo, Japan
| | | | - Satomi Takei
- Department of Clinical Laboratory Medicine, Tokyo, Japan
| | - Ayako Nakamura
- Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | | | - Shinsaku Togo
- Department of Respiratory Medicine, Tokyo, Japan; Research Institute for Diseases of Old Ages, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
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Takahashi T, Ai T, Saito K, Nojiri S, Takahashi M, Igawa G, Yamamoto T, Khasawneh A, Paran FJ, Takei S, Horiuchi Y, Kanno T, Tobiume M, Hiki M, Wakita M, Miida T, Okuzawa A, Suzuki T, Takahashi K, Naito T, Tabe Y. Assessment of antibody dynamics and neutralizing activity using serological assay after SARS-CoV-2 infection and vaccination. PLoS One 2023; 18:e0291670. [PMID: 37725623 PMCID: PMC10508622 DOI: 10.1371/journal.pone.0291670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 09/01/2023] [Indexed: 09/21/2023] Open
Abstract
The COVID-19 antibody test was developed to investigate the humoral immune response to SARS-CoV-2 infection. In this study, we examined whether S antibody titers measured using the anti-SARS-CoV-2 IgG II Quant assay (S-IgG), a high-throughput test method, reflects the neutralizing capacity acquired after SARS-CoV-2 infection or vaccination. To assess the antibody dynamics and neutralizing potency, we utilized a total of 457 serum samples from 253 individuals: 325 samples from 128 COVID-19 patients including 136 samples from 29 severe/critical cases (Group S), 155 samples from 71 mild/moderate cases (Group M), and 132 samples from 132 health care workers (HCWs) who have received 2 doses of the BNT162b2 vaccinations. The authentic virus neutralization assay, the surrogate virus neutralizing antibody test (sVNT), and the Anti-N SARS-CoV-2 IgG assay (N-IgG) have been performed along with the S-IgG. The S-IgG correlated well with the neutralizing activity detected by the authentic virus neutralization assay (0.8904. of Spearman's rho value, p < 0.0001) and sVNT (0.9206. of Spearman's rho value, p < 0.0001). However, 4 samples (2.3%) of S-IgG and 8 samples (4.5%) of sVNT were inconsistent with negative results for neutralizing activity of the authentic virus neutralization assay. The kinetics of the SARS-CoV-2 neutralizing antibodies and anti-S IgG in severe cases were faster than the mild cases. All the HCWs elicited anti-S IgG titer after the second vaccination. However, the HCWs with history of COVID-19 or positive N-IgG elicited higher anti-S IgG titers than those who did not have it previously. Furthermore, it is difficult to predict the risk of breakthrough infection from anti-S IgG or sVNT antibody titers in HCWs after the second vaccination. Our data shows that the use of anti-S IgG titers as direct quantitative markers of neutralizing capacity is limited. Thus, antibody tests should be carefully interpreted when used as serological markers for diagnosis, treatment, and prophylaxis of COVID-19.
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Affiliation(s)
- Toshihiro Takahashi
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Tomohiko Ai
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kaori Saito
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shuko Nojiri
- Medical Technology Innovation Center, Juntendo University, Tokyo, Japan
| | - Maika Takahashi
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Gene Igawa
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Takamasa Yamamoto
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Abdullah Khasawneh
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Faith Jessica Paran
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Satomi Takei
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuki Horiuchi
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takayuki Kanno
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Minoru Tobiume
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Makoto Hiki
- Department of Emergency Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
- Department of Cardiovascular Biology and Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Mitsuru Wakita
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Atsushi Okuzawa
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Coloproctological Surgery, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kazuhisa Takahashi
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Respiratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Naito
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoko Tabe
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Jin B, Oyama R, Tabe Y, Tsuchiya K, Hando T, Wakita M, Yan Y, Saita M, Takei S, Horiuchi Y, Miida T, Naito T, Takahashi K, Ogawa H. Investigation of the individual genetic evolution of SARS-CoV-2 in a small cluster during the rapid spread of the BF.5 lineage in Tokyo, Japan. Front Microbiol 2023; 14:1229234. [PMID: 37744926 PMCID: PMC10516552 DOI: 10.3389/fmicb.2023.1229234] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 08/17/2023] [Indexed: 09/26/2023] Open
Abstract
There has been a decreasing trend in new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) cases and fatalities worldwide. The virus has been evolving, indicating the potential emergence of new variants and uncertainties. These challenges necessitate continued efforts in disease control and mitigation strategies. We investigated a small cluster of SARS-CoV-2 Omicron variant infections containing a common set of genomic mutations, which provided a valuable model for investigating the transmission mechanism of genetic alterations. We conducted a study at a medical center in Japan during the Omicron surge (sub-lineage BA.5), sequencing the entire SARS-CoV-2 genomes from infected individuals and evaluating the phylogenetic tree and haplotype network among the variants. We compared the mutations present in each strain within the BA.5 strain, TKYnat2317, which was first identified in Tokyo, Japan. From June 29th to July 4th 2022, nine healthcare workers (HCWs) tested positive for SARS-CoV-2 by real-time PCR. During the same period, five patients also tested positive by real-time PCR. Whole genome sequencing revealed that the infected patients belonged to either the isolated BA.2 or BA.5 sub-lineage, while the healthcare worker infections were classified as BF.5. The phylogenetic tree and haplotype network clearly showed the specificity and similarity of the HCW cluster. We identified 12 common mutations in the cluster, including I110V in nonstructural protein 4 (nsp4), A1020S in the Spike protein, and H47Y in ORF7a, compared to the BA.5 reference. Additionally, one case had the extra nucleotide-deletion mutation I27* in ORF10, and low frequencies of genetic alterations were also found in certain instances. The results of genome sequencing showed that the nine HCWs shared a set of genetic mutations, indicating transmission within the cluster. Minor mutations observed in five HCW individuals suggested the emergence of new virus variants. Five amino acid substitutions occurred in nsp3, which could potentially affect virus replication or immune escape. Intra-host evolution also generated additional mutations. The cluster exhibited a mild disease course, with individuals in this case, recovering without requiring any medical treatments. Further investigation is needed to understand the relationship between the genetic evolution of the virus and the symptoms.
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Affiliation(s)
- Bo Jin
- Department of Clinical Laboratory, Peking University First Hospital, Beijing, China
| | - Rieko Oyama
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoko Tabe
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Koji Tsuchiya
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Tetsuya Hando
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Mitsuru Wakita
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Yan Yan
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Mizue Saita
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Satomi Takei
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuki Horiuchi
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Naito
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kazuhisa Takahashi
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Respiratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hideoki Ogawa
- Department of Dermatology, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Kim J, Hasegawa T, Tada K, Uehara Y, Fukui Y, Nakamura A, Takei S, Mitarai S, Aono A, Ikeda S. A Systemic Lupus Erythematosus Patient with Cutaneous Mycobacterium haemophilum Infection under Belimumab Treatment: A Case Report. Ann Dermatol 2023; 35:S63-S66. [PMID: 37853868 PMCID: PMC10608360 DOI: 10.5021/ad.21.077] [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: 04/14/2021] [Revised: 07/21/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2023] Open
Abstract
A 38-year-old female with systemic lupus erythematosus (SLE) initiated belimumab treatment. One month later, she presented with a reddish painful swelling on her right lower leg. She was treated with ceftriaxone and vancomycin. However, novel erythematous papules and indurated nodules appeared on both her lower legs. Skin biopsy revealed microabscess formation with mixed cell granuloma surrounded by inflammatory cell infiltration within the dermis with subcutaneous fat tissue. A large number of acid-fast bacilli were observed with Ziehl-Neelsen staining. DNA sequencing of both the hsp65 and the 16S rRNA sequences showed a 100% match with the corresponding region of Mycobacterium haemophilum. Mycobacterial culture revealed satellite growth enhancement on Middlebrook 7H11 agar plates around a paper strip containing hemin. She was treated with levofloxacin, rifabutin, and ethambutol. Within 13 months, her cutaneous lesions improved markedly without any side effects. The B cell-targeted biologic belimumab, a fully humanized IgG1γ monoclonal antibody that inactivates B lymphocyte stimulator, has been considered to be beneficial for active SLE. However, this therapy could increase the risk for the development of biologic therapy-associated mycobacterial infections, both tuberculosis and nontuberculous mycobacteria infections.
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Affiliation(s)
- Jonghun Kim
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Hasegawa
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - Kurisu Tada
- Department of Rheumatology and Internal Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuki Uehara
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Clinical Laboratory, St Luke's International Hospital, Tokyo, Japan
| | - Yukiko Fukui
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Ayako Nakamura
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Satomi Takei
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Satoshi Mitarai
- Department of Mycobacterium Reference and Research, the Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - Akio Aono
- Department of Mycobacterium Reference and Research, the Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan
| | - Shigaku Ikeda
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Hayashi R, Katsumi T, Ansai O, Takei S, Yokoyama R, Yuki A, Hasegawa A, Takatsuka S, Takenouchi T, Abe R. 157 Analysis of the hybrid schwannoma and neurofibroma including a case report of schwannomatosis caused by a mutation in the LZTR1 gene. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.167] [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: 11/19/2022]
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Takei S, Ai T, Yamamoto T, Igawa G, Kanno T, Tobiume M, Hiki M, Saito K, Khasawneh A, Wakita M, Misawa S, Miida T, Okuzawa A, Suzuki T, Takahashi K, Naito T, Tabe Y. Performance evaluation of the Roche Elecsys® Anti-SARS-CoV-2 immunoassays by comparison with neutralizing antibodies and clinical assessment. PLoS One 2022; 17:e0274181. [PMID: 36107911 PMCID: PMC9477342 DOI: 10.1371/journal.pone.0274181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 08/24/2022] [Indexed: 11/19/2022] Open
Abstract
Quantitative measurement of SARS-CoV-2 neutralizing antibodies is highly expected to evaluate immune status, vaccine response, and antiviral therapy. The Elecsys® Anti-SARS-CoV-2 S (Elecsys® anti-S) was developed to measure anti-SARS-CoV-2 S proteins. We sought to investigate whether Elecsys® anti-S can be used to predict neutralizing activities in patients' serums using an authentic virus neutralization assay. One hundred forty-six serum samples were obtained from 59 patients with COVID-19 at multiple time points. Of the 59 patients, 44 cases were included in Group M (mild 23, moderate 21) and produced 84 samples (mild 35, moderate 49), while 15 cases were included in Group S (severe 11, critical 4) and produced 62 samples (severe 43, critical 19). The neutralization assay detected 73% positive cases, and Elecsys® anti-S and Elecsys® Anti-SARS-CoV-2 (Elecsys® anti-N) showed 72% and 66% positive cases, respectively. A linear correlation between the Elecsys® anti-S assay and the neutralization assay were highly correlated (r = 0.7253, r2 = 0.5261) than a linear correlation between the Elecsys® anti-N and neutralization assay (r = 0.5824, r2 = 0.3392). The levels of Elecsys® anti-S antibody and neutralizing activities were significantly higher in Group S than in Group M after 6 weeks from onset of symptoms (p < 0.05). Conversely, the levels of Elecsys® anti-N were comparable in both groups. Three immunosuppressed patients, including cancer patients, showed low levels of anti-S and anti-N antibodies and neutralizing activities throughout the measurement period, indicating the need for careful follow-up. Our data indicate that Elecsys® anti-S can predict the neutralization antibodies in COVID-19.
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Affiliation(s)
- Satomi Takei
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Tomohiko Ai
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takamasa Yamamoto
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Gene Igawa
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Takayuki Kanno
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Minoru Tobiume
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Makoto Hiki
- Department of Emergency Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
- Department of Cardiovascular Biology and Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Kaori Saito
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Abdullah Khasawneh
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Mitsuru Wakita
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Shigeki Misawa
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Atsushi Okuzawa
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Coloproctological Surgery, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Kazuhisa Takahashi
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Respiratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Naito
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoko Tabe
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Takahashi M, Ai T, Sinozuka K, Baba Y, Igawa G, Nojiri S, Yamamoto T, Yuri M, Takei S, Saito K, Horiuchi Y, Kanno T, Tobiume M, Khasawneh A, Paran FJ, Hiki M, Wakita M, Miida T, Suzuki T, Okuzawa A, Takahashi K, Naito T, Tabe Y. Activation of SARS-CoV-2 neutralizing antibody is slower than elevation of spike-specific IgG, IgM, and nucleocapsid-specific IgG antibodies. Sci Rep 2022; 12:14909. [PMID: 36050347 PMCID: PMC9436163 DOI: 10.1038/s41598-022-19073-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 08/24/2022] [Indexed: 11/19/2022] Open
Abstract
COVID-19 antibody testing has been developed to investigate humoral immune response in SARS-CoV-2 infection. To assess the serological dynamics and neutralizing potency following SARS-CoV-2 infection, we investigated the neutralizing (NT) antibody, anti-spike, and anti-nucleocapsid antibodies responses using a total of 168 samples obtained from 68 SARS-CoV-2 infected patients. Antibodies were measured using an authentic virus neutralization assay, the high-throughput laboratory measurements of the Abbott Alinity quantitative anti-spike receptor-binding domain IgG (S-IgG), semiquantitative anti-spike IgM (S-IgM), and anti-nucleocapsid IgG (N-IgG) assays. The quantitative measurement of S-IgG antibodies was well correlated with the neutralizing activity detected by the neutralization assay (r = 0.8943, p < 0.0001). However, the kinetics of the SARS-CoV-2 NT antibody in severe cases were slower than that of anti-S and anti-N specific antibodies. These findings indicate a limitation of using the S-IgG antibody titer, detected by the chemiluminescent immunoassay, as a direct quantitative marker of neutralizing activity capacity. Antibody testing should be carefully interpreted when utilized as a marker for serological responses to facilitate diagnostic, therapeutic, and prophylactic interventions.
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Affiliation(s)
- Maika Takahashi
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Tomohiko Ai
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Konomi Sinozuka
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Yuna Baba
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Gene Igawa
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Shuko Nojiri
- Medical Technology Innovation Center, Juntendo University, Tokyo, Japan
| | - Takamasa Yamamoto
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Maiko Yuri
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Satomi Takei
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Kaori Saito
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Yuki Horiuchi
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Takayuki Kanno
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Minoru Tobiume
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Abdullah Khasawneh
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Faith Jessica Paran
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Makoto Hiki
- Department of Emergency Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
- Department of Cardiovascular Biology and Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Mitsuru Wakita
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Atsushi Okuzawa
- Medical Technology Innovation Center, Juntendo University, Tokyo, Japan
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kazuhisa Takahashi
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Respiratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Naito
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of General Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yoko Tabe
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Hongo 2-1-2, Bunkyo-ku, Tokyo, 113-8421, Japan.
- Department of Research Support Utilizing Bioresource Bank, Juntendo University Graduate School of Medicine, Tokyo, Japan.
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9
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Takei S, Lu YJ, Tohya M, Watanabe S, Misawa S, Tabe Y, Miida T, Mya S, Tin HH, Tada T, Kirikae T. Spread of Carbapenem-Resistant Klebsiella pneumoniae Clinical Isolates Producing NDM-Type Metallo-β-Lactamase in Myanmar. Microbiol Spectr 2022; 10:e0067322. [PMID: 35762817 PMCID: PMC9431462 DOI: 10.1128/spectrum.00673-22] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/30/2022] [Indexed: 11/20/2022] Open
Abstract
A total of 38 isolates of carbapenem-resistant Klebsiella pneumoniae harboring blaNDM were obtained during surveillance of 10 hospitals in Myanmar. Of these 38 isolates, 19 (50%) harbored genes encoding 16S rRNA methylases, such as armA or rmtB. The K. pneumoniae strains tested belonged to 17 sequence types (STs), including the high-risk clonal lineages ST101 and ST147. The ST101 and ST147 isolates carried IncFII plasmids harboring blaNDM-5 and IncFIB(pQil) plasmids harboring blaNDM-1, respectively. These results indicate that IncFII plasmids harboring blaNDM-5 and IncFIB(pQil) plasmids harboring blaNDM-1 have been spreading in K. pneumoniae ST101 and ST147 isolates, respectively, in Myanmar. IMPORTANCE The emergence of carbapenem-resistant K. pneumoniae has become a serious problem in medical settings worldwide. The present study demonstrated that carbapenem-resistant K. pneumoniae strains have been spreading in medical settings in Myanmar. In particular, plasmid genes encoding NDMs and 16S rRNA methylases have been spreading in K. pneumoniae high-risk clones.
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Affiliation(s)
- Satomi Takei
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yu Jie Lu
- Department of Microbiology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Mari Tohya
- Department of Microbiology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shin Watanabe
- Department of Microbiome Research, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shigeki Misawa
- Department of Clinical Laboratory, Juntendo University Hospital, Tokyo, Japan
| | - Yoko Tabe
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - San Mya
- National Health Laboratory, Yangon, Myanmar
| | | | - Tatsuya Tada
- Department of Microbiology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Teruo Kirikae
- Department of Microbiology, Juntendo University Graduate School of Medicine, Tokyo, Japan
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10
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Tsutsui Y, Hasegawa A, Uchida S, Terao K, Takei S, Yokoyama A, Sato A, Kabata Y, Hayashi R, Fujikawa H, Togashi K, Abe R. Dermatitis herpetiformis triggered by iodine contrast media. J Eur Acad Dermatol Venereol 2021; 36:e348-e350. [PMID: 34897819 DOI: 10.1111/jdv.17860] [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: 11/29/2022]
Affiliation(s)
- Y Tsutsui
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - A Hasegawa
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - S Uchida
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Terao
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - S Takei
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - A Yokoyama
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - A Sato
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Y Kabata
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - R Hayashi
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - H Fujikawa
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | | | - R Abe
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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11
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Takei S, Hama N, Mizukawa Y, Takahashi H, Miyagawa F, Asada H, Abe R. Purpura as an indicator of severity in drug-induced hypersensitivity syndrome/drug reaction with eosinophilia and systemic symptoms: evidence from a 49-case series. J Eur Acad Dermatol Venereol 2021; 36:e310-e313. [PMID: 34839562 DOI: 10.1111/jdv.17838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 10/23/2021] [Accepted: 11/26/2021] [Indexed: 11/28/2022]
Affiliation(s)
- S Takei
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - N Hama
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Y Mizukawa
- Department of Dermatology, Kyorin University School of Medicine, Tokyo, Japan
| | - H Takahashi
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - F Miyagawa
- Department of Dermatology, Nara Medical University School of Medicine, Nara, Japan
| | - H Asada
- Department of Dermatology, Nara Medical University School of Medicine, Nara, Japan
| | - R Abe
- Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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12
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Kambe N, Kitagawa Y, Kawasaki Y, Yamasaki Y, Takei S, Saito M. 209 TNF-Targeting Treatment Corrects Proinflammatory Signatures of Autoinflammatory Blau Syndrome. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.08.214] [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: 10/20/2022]
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13
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Watabe E, Togo-Ohno M, Ishigami Y, Wani S, Hirota K, Kimura-Asami M, Hasan S, Takei S, Fukamizu A, Suzuki Y, Suzuki T, Kuroyanagi H. m 6 A-mediated alternative splicing coupled with nonsense-mediated mRNA decay regulates SAM synthetase homeostasis. EMBO J 2021; 40:e106434. [PMID: 34152017 DOI: 10.15252/embj.2020106434] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [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: 08/04/2020] [Revised: 04/29/2021] [Accepted: 05/07/2021] [Indexed: 12/24/2022] Open
Abstract
Alternative splicing of pre-mRNAs can regulate gene expression levels by coupling with nonsense-mediated mRNA decay (NMD). In order to elucidate a repertoire of mRNAs regulated by alternative splicing coupled with NMD (AS-NMD) in an organism, we performed long-read RNA sequencing of poly(A)+ RNAs from an NMD-deficient mutant strain of Caenorhabditis elegans, and obtained full-length sequences for mRNA isoforms from 259 high-confidence AS-NMD genes. Among them are the S-adenosyl-L-methionine (SAM) synthetase (sams) genes sams-3 and sams-4. SAM synthetase activity autoregulates sams gene expression through AS-NMD in a negative feedback loop. We furthermore find that METT-10, the orthologue of human U6 snRNA methyltransferase METTL16, is required for the splicing regulation in␣vivo, and specifically methylates the invariant AG dinucleotide at the distal 3' splice site (3'SS) in␣vitro. Direct RNA sequencing coupled with machine learning confirms m6 A modification of endogenous sams mRNAs. Overall, these results indicate that homeostasis of SAM synthetase in C. elegans is maintained by alternative splicing regulation through m6 A modification at the 3'SS of the sams genes.
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Affiliation(s)
- Eichi Watabe
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
| | - Marina Togo-Ohno
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
| | - Yuma Ishigami
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Shotaro Wani
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
| | - Keiko Hirota
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba-shi, Ibaraki, Japan
| | - Mariko Kimura-Asami
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
| | - Sharmin Hasan
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
| | - Satomi Takei
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan
| | - Akiyoshi Fukamizu
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba-shi, Ibaraki, Japan
| | - Yutaka Suzuki
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa-shi, Chiba, Japan
| | - Tsutomu Suzuki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Hidehito Kuroyanagi
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University (TMDU), Bunkyo-ku, Tokyo, Japan.,Department of Biochemistry, Graduate School of Medicine, University of the Ryukyus, Nishihara-cho, Okinawa, Japan
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14
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Kurokawa K, Harada N, Sasano H, Takagi H, Takei S, Nakamura A, Kamada K, Yoshida A, Kikuchi K, Takahashi K. Pulmonary infection due to fluoroquinolone-resistant Mycolicibacterium fortuitum: a case report. BMC Infect Dis 2020; 20:866. [PMID: 33213390 PMCID: PMC7678322 DOI: 10.1186/s12879-020-05596-1] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 11/05/2020] [Indexed: 01/21/2023] Open
Abstract
Background Mycolicibacterium fortuitum is a species of the rapidly growing mycobacteria that can cause pulmonary infection. It is susceptible to multiple antibiotics both in vitro and in clinical practice, so that any combination of susceptible drugs is effective. However, we encountered a case of infection due to fluoroquinolone-resistant M. fortuitum. In this study, we report the case and describe the mechanism of resistance. Case presentation A 65-year-old man with a history of total gastrectomy and immunosuppressant treatment for rheumatoid arthritis developed a recurrence of pulmonary infection caused by M. fortuitum. He was treated with clarithromycin and levofloxacin as a first-line treatment, based on the favorable susceptibility at that time. After recurrence, a high minimum inhibitory concentration to fluoroquinolones was detected. DNA sequencing of the pathogen showed the substitution of serine for tryptophan at residue 83 in the gyrA gene. He was successfully treated with a combination of other antibiotics. Conclusion This is the first report on the treatment of fluoroquinolone-resistant M. fortuitum and investigation of the mechanism of resistance. We suggest that the susceptibility test remains effective for determining the next line of treatment after a pathogen has acquired resistance, and resistance to fluoroquinolones in M. fortuitum can be attributed to a single change of amino acid.
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Affiliation(s)
- Kana Kurokawa
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Norihiro Harada
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan.
| | - Hitoshi Sasano
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Haruhi Takagi
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Satomi Takei
- Department of Clinical Laboratory, Juntendo University Hospital, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Ayako Nakamura
- Department of Clinical Laboratory, Juntendo Tokyo Koto Geriatric Medical Center, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Keisuke Kamada
- Department of Infectious Diseases, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Atsushi Yoshida
- Department of Infectious Diseases, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Ken Kikuchi
- Department of Infectious Diseases, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Kazuhisa Takahashi
- Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, 3-1-3 Hongo, Bunkyo-ku, Tokyo, 113-8431, Japan
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15
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Watanabe J, Ishibe A, Takei S, Suwa Y, Suwa H, Endo I. A new intracorporeal suture-less stapled end-to-end anastomosis in laparoscopic left-colectomy for colon cancer - a video vignette. Colorectal Dis 2020; 22:1803-1804. [PMID: 32620045 DOI: 10.1111/codi.15232] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 06/15/2020] [Indexed: 02/08/2023]
Affiliation(s)
- J Watanabe
- Department of Surgery, Gastroenterological Center, Yokohama City University Medical Center, Yokohama, Japan
| | - A Ishibe
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - S Takei
- Department of Surgery, Gastroenterological Center, Yokohama City University Medical Center, Yokohama, Japan
| | - Y Suwa
- Department of Surgery, Gastroenterological Center, Yokohama City University Medical Center, Yokohama, Japan
| | - H Suwa
- Department of Surgery, Yokosuka Kyosai Hospital, Yokosuka, Japan
| | - I Endo
- Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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16
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Takei S, Ihara H, Togo S, Nakamura A, Fujimoto Y, Watanabe J, Kurokawa K, Shibayama K, Sumiyoshi I, Ochi Y, Iwai M, Okabe T, Chonan M, Misawa S, Ohsaka A, Takahashi K. The synergetic effect of Imipenem-clarithromycin combination in the Mycobacteroides abscessus complex. BMC Microbiol 2020; 20:316. [PMID: 33076820 PMCID: PMC7574464 DOI: 10.1186/s12866-020-02000-5] [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: 05/31/2020] [Accepted: 10/09/2020] [Indexed: 12/05/2022] Open
Abstract
Background Nontuberculous mycobacteria (NTM) are ubiquitous organisms and the incidence of NTM infections has been increasing in recent years. Mycobacteroides abscessus (M. abscessus) is one of the most antimicrobial-resistant NTM; however, no reliable antibiotic regimen can be officially advocated. We evaluated the efficacy of clarithromycin in combination with various antimicrobial agents against the M. abscessus complex. Results Twenty-nine clinical strains of M. abscessus were isolated from various clinical samples. Of the isolates, 10 (34.5%) were of M. abscessus subsp. abscessus, 18 (62.1%) of M. abscessus subsp. massiliense, and 1 (3.4%) of M. abscessus subsp. bolletii. MICs of three antimicrobial agents (amikacin, imipenem, and moxifloxacin) were measured with or without clarithromycin. The imipenem-clarithromycin combination significantly reduced MICs compared to clarithromycin and imipenem monotherapies, including against resistant strains. The association between susceptibility of the M. abscessus complex and each combination of agents was significant (p = 0.001). Adjusted residuals indicated that the imipenem-clarithromycin combination had the synergistic effect (adjusted residual = 3.1) and suppressed the antagonistic effect (adjusted residual = − 3.1). In subspecies of M. abscessus complex, the association with susceptibility of M. abscessus subsp. massiliense was similarly statistically significant (p = 0.036: adjusted residuals of synergistic and antagonistic effect respectively: 2.6 and − 2.6). The association with susceptibility of M. abscessus subsp. abscessus also showed a similar trend but did not reach statistical significance. Conclusion Our data suggest that the imipenem-clarithromycin combination could be the recommended therapeutic choice for the treatment of M. abscessus complex owing to its ability to restore antimicrobial susceptibility.
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Affiliation(s)
- Satomi Takei
- Department of Clinical Laboratory, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
| | - Hiroaki Ihara
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan. .,Koto Hospital, Tokyo, Japan.
| | - Shinsaku Togo
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan. .,Research Institute for Diseases of Old Ages, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan.
| | - Ayako Nakamura
- Juntendo Tokyo Koto Geriatric Medical Center, Tokyo, Japan
| | - Yuichi Fujimoto
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Junko Watanabe
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kana Kurokawa
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Kohei Shibayama
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Issei Sumiyoshi
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Yusuke Ochi
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
| | - Moe Iwai
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan.,Research Institute for Diseases of Old Ages, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
| | - Takahiro Okabe
- Leading Center for the Development and Research of Cancer Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
| | - Masayoshi Chonan
- Department of Clinical Laboratory, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
| | - Shigeki Misawa
- Department of Clinical Laboratory, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
| | - Akimichi Ohsaka
- Department of Transfusion Medicine and Stem Cell Regulation, Juntendo University, Faculty of Medicine & Graduate School of Medicine, Tokyo, Japan
| | - Kazuhisa Takahashi
- Department of Respiratory Medicine, Juntendo University, Faculty of Medicine & Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo, 113-8421, Japan
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17
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Ruperto N, Mccann L, Takei S, Pilkington C, Bass D, Ji B, Hammer A, Okily M, Eriksson G, Quasny H, Brunner H. SAT0505 PLUTO TRIAL OF INTRAVENOUS BELIMUMAB IN PAEDIATRIC PATIENTS WITH CHILDHOOD-ONSET SYSTEMIC LUPUS ERYTHEMATOSUS (cSLE): PATIENT RESPONSES OVER TIME. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Belimumab (BEL) is a human monoclonal antibody that specifically inhibits B-cell activating factor (BAFF). PLUTO is an ongoing trial evaluating efficacy and safety of intravenous (IV) BEL in children ≥5 years of age with cSLE. Efficacy, and safety endpoints of PLUTO have been reported;1briefly, numerically more BEL vs PBO pts met the primary and major secondary efficacy endpoints. We present patient (pt) response to BEL over time.Objectives:To evaluate changes in SLE Responder Index (SRI) 4 and SRI6 responses, and disease activity over 52 weeks, in paediatric pts receiving BEL, or placebo (PBO), plus standard SLE therapy (SST).Methods:PLUTO (GSK Study BEL114055,NCT01649765) is a Phase 2, randomised, double-blind, placebo-controlled study. Pts 5–17 years of age with active cSLE were randomised to monthly BEL 10 mg/kg IV, or PBO, plus SST. Endpoints assessed: SRI4 and SRI6 response rate, mean percentage and absolute change from baseline in Safety of Estrogens in Lupus Erythematosus National Assessment (SELENA)-SLE Disease Activity Index (SLEDAI) and Physicians’ Global Assessment (PGA) scores, and percentage of pts with no new British Isles Lupus Assessment Group (BILAG) 1A/2B organ domain scores compared with baseline, all by study visit. The last-observation-carried-forward (LOCF) principle (missing values imputed using the last available non-missing value) was applied to pts who withdrew or received protocol-prohibited medication or a dose of allowable medication that resulted in treatment failure prior to the Week (Wk) 52 visit. Descriptive statistics were used.Results:A total of 93 pts (94.6% female, mean [SD] age 14.0 [2.49] years) were randomised for the intention-to-treat (ITT) population: 53 to BEL and 40 to PBO. Mean (SD) BEL and PBO baseline scores were 10.3 (3.34) and 10.4 (3.63) for SELENA-SLEDAI and 1.3 (0.43) and 1.4 (0.42) for PGA, respectively. Pt number with at least BILAG 1A/2B organ domain involvement at baseline was 37 (69.8%) for BEL and 29 (72.5%) for PBO. SRI4 and SRI6 responses over 52 weeks were mostly numerically higher with BEL than PBO; more BEL than PBO pts were SRI4 and SRI6 responders at Wk 52 (Figure 1). Unadjusted mean (SE) percentage changes from baseline over time in SELENA-SLEDAI and PGA scores generally favoured BEL over PBO, as did unadjusted mean (SE) absolute changes (Figure 2). Wk 52 adjusted mean (95% CI) percentage treatment difference vs PBO was -4.0% (-21.8, 13.9) for SELENA-SLEDAI and -6.1% (-23.9, 11.7) for PGA, while Wk 52 adjusted mean (95% CI) treatment difference vs PBO was -0.7 (-2.4, 1.1) for SELENA-SLEDAI and -0.1 (-0.3, 0.1) for PGA. Over the study duration, numerically more BEL than PBO pts had no new BILAG 1A/2B organ domain scores (Figure 2).Figure 1.SRI4 and SRI6 response by study visitFigure 2.SELENA-SLEDAI and PGA score mean percentage and absolute change from baseline, and no new BILAG 1A/2B organ domain scores compared with baseline, all by study visitConclusion:In line with the main analyses performed at Wk 52,1further analyses of responses over time in SRI4, SRI6 and disease activity generally favoured BEL over PBO. Combined, these results continue to support the efficacy profile of IV BEL in the treatment of children with cSLE.References:[1]Brunner HI,et al.Arthritis Rheumatol.2018;70(59): 3224–5, Abst. 2867Acknowledgments:We acknowledge all PLUTO investigators (PRINTO, PRCSG and otherwise affiliated). Study funding: GSK.Disclosure of Interests:Nicolino Ruperto Consultant of: Ablynx, AbbVie, AstraZeneca-Medimmune, Biogen, Boehringer, Bristol-Myers Squibb, Eli-Lilly, EMD Serono, GSK, Hoffmann-La Roche, Janssen, Merck, Novartis, Pfizer, R-Pharma, Sanofi, Servier, Sinergie, Sobi and Takeda, Liza McCann: None declared, Syuji Takei Grant/research support from: Eisai, Consultant of: Novartis, Bristol-Myers Squibb, Speakers bureau: GSK, Sanofi, Tanabe-Mitsubishi, Novartis, Chugai, Ono, Abbvie, Eli-Lilly, Bristol-Myers Squibb, Clarissa Pilkington: None declared, Damon Bass Shareholder of: GSK, Employee of: GSK, Beulah Ji Shareholder of: GSK, Employee of: GSK, Anne Hammer Shareholder of: GSK, Employee of: GSK, Mohamed Okily Shareholder of: GSK, Employee of: GSK, Gina Eriksson Shareholder of: GSK, Employee of: GSK, Holly Quasny Shareholder of: GSK, Employee of: GSK, Hermine Brunner Consultant of: Hoffman-La Roche, Novartis, Pfizer, Sanofi Aventis, Merck Serono, AbbVie, Amgen, Alter, AstraZeneca, Baxalta Biosimilars, Biogen Idec, Boehringer, Bristol-Myers Squibb, Celgene, EMD Serono, Janssen, MedImmune, Novartis, Pfizer, and UCB Biosciences, Speakers bureau: GSK, Roche, and Novartis
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Maeda H, Murata K, Sakuma N, Takei S, Yamazaki A, Karim MR, Kawata M, Hirose S, Kawagishi-Kobayashi M, Taniguchi Y, Suzuki S, Sekino K, Ohshima M, Kato H, Yoshida H, Tozawa Y. A rice gene that confers broad-spectrum resistance to β-triketone herbicides. Science 2020; 365:393-396. [PMID: 31346065 DOI: 10.1126/science.aax0379] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 06/28/2019] [Indexed: 01/08/2023]
Abstract
The genetic variation of rice cultivars provides a resource for further varietal improvement through breeding. Some rice varieties are sensitive to benzobicyclon (BBC), a β-triketone herbicide that inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD). Here we identify a rice gene, HIS1 (HPPD INHIBITOR SENSITIVE 1), that confers resistance to BBC and other β-triketone herbicides. We show that HIS1 encodes an Fe(II)/2-oxoglutarate-dependent oxygenase that detoxifies β-triketone herbicides by catalyzing their hydroxylation. Genealogy analysis revealed that BBC-sensitive rice variants inherited a dysfunctional his1 allele from an indica rice variety. Forced expression of HIS1 in Arabidopsis conferred resistance not only to BBC but also to four additional β-triketone herbicides. HIS1 may prove useful for breeding herbicide-resistant crops.
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Affiliation(s)
- Hideo Maeda
- Institute of Crop Science, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8518, Japan
| | - Kazumasa Murata
- Toyama Prefectural Agricultural, Forestry and Fisheries Research Center, Toyama 939-8153, Japan
| | - Nozomi Sakuma
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Satomi Takei
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Akihiko Yamazaki
- Tsukuba Research and Technology Center, SDS Biotech K.K., Tsukuba 300-2646, Japan
| | - Md Rezaul Karim
- Institute of Crop Science, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8518, Japan
| | - Motoshige Kawata
- Institute of Agrobiological Sciences, NARO, Tsukuba 305-8634, Japan
| | - Sakiko Hirose
- Institute of Agrobiological Sciences, NARO, Tsukuba 305-8634, Japan
| | | | - Yojiro Taniguchi
- Institute of Agrobiological Sciences, NARO, Tsukuba 305-8634, Japan
| | - Satoru Suzuki
- Tsukuba Research and Technology Center, SDS Biotech K.K., Tsukuba 300-2646, Japan
| | - Keisuke Sekino
- Tsukuba Research and Technology Center, SDS Biotech K.K., Tsukuba 300-2646, Japan
| | - Masahiro Ohshima
- Institute of Agrobiological Sciences, NARO, Tsukuba 305-8634, Japan
| | - Hiroshi Kato
- Institute of Crop Science, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8518, Japan
| | - Hitoshi Yoshida
- Institute of Agrobiological Sciences, NARO, Tsukuba 305-8634, Japan
| | - Yuzuru Tozawa
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan.
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Takei S, Togo-Ohno M, Suzuki Y, Kuroyanagi H. Evolutionarily conserved autoregulation of alternative pre-mRNA splicing by ribosomal protein L10a. Nucleic Acids Res 2016; 44:5585-5596. [PMID: 26961311 PMCID: PMC4937301 DOI: 10.1093/nar/gkw152] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 11/26/2022] Open
Abstract
Alternative splicing of pre-mRNAs can regulate expression of protein-coding genes by generating unproductive mRNAs rapidly degraded by nonsense-mediated mRNA decay (NMD). Many of the genes directly regulated by alternative splicing coupled with NMD (AS-NMD) are related to RNA metabolism, but the repertoire of genes regulated by AS-NMD in vivo is to be determined. Here, we analyzed transcriptome data of wild-type and NMD-defective mutant strains of the nematode worm Caenorhabditis elegans and demonstrate that eight of the 82 cytoplasmic ribosomal protein (rp) genes generate unproductively spliced mRNAs. Knockdown of any of the eight rp genes exerted a dynamic and compensatory effect on alternative splicing of its own transcript and inverse effects on that of the other rp genes. A large subunit protein L10a, termed RPL-1 in nematodes, directly and specifically binds to an evolutionarily conserved 39-nt stretch termed L10ARE between the two alternative 5′ splice sites in its own pre-mRNA to switch the splice site choice. Furthermore, L10ARE-mediated splicing autoregulation of the L10a-coding gene is conserved in vertebrates. These results indicate that L10a is an evolutionarily conserved splicing regulator and that homeostasis of a subset of the rp genes are regulated at the level of pre-mRNA splicing in vivo.
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Affiliation(s)
- Satomi Takei
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Marina Togo-Ohno
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Yutaka Suzuki
- Department of Medical Genome Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Hidehito Kuroyanagi
- Laboratory of Gene Expression, Medical Research Institute, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8510, Japan
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Harigai M, Ishiguro N, Inokuma S, Mimori T, Ryu J, Takasaki Y, Takei S, Takeuchi T, Tanaka Y, Yamanaka H, Watanabe M, Koike T. AB0435 Effects of Prior Use of BIOLOGICS on the Safety and Effectiveness of Abatacept Administered with or without Methotrexate in Japanese Patients with Rheumatoid Arthritis: Sub-Analysis of the Abatacept All-Cases Post-Marketing Surveillance. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1987] [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: 11/03/2022]
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Kuroyanagi H, Takei S, Suzuki Y. Comprehensive analysis of mutually exclusive alternative splicing in C. elegans. Worm 2014; 3:e28459. [PMID: 25254147 PMCID: PMC4165533 DOI: 10.4161/worm.28459] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/28/2014] [Accepted: 03/06/2014] [Indexed: 12/03/2022]
Abstract
Mutually exclusive selection of one exon in a cluster of exons is a rare form of alternative pre-mRNA splicing, yet suggests strict regulation. However, the repertoires of regulation mechanisms for the mutually exclusive (ME) splicing in vivo are still unknown. Here, we experimentally explore putative ME exons in C. elegans to demonstrate that 29 ME exon clusters in 27 genes are actually selected in a mutually exclusive manner. Twenty-two of the clusters consist of homologous ME exons. Five clusters have too short intervening introns to be excised between the ME exons. Fidelity of ME splicing relies at least in part on nonsense-mediated mRNA decay for 14 clusters. These results thus characterize all the repertoires of ME splicing in this organism.
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Affiliation(s)
- Hidehito Kuroyanagi
- Laboratory of Gene Expression; Medical Research Institute; Tokyo Medical and Dental University; Bunkyo-ku, Tokyo, Japan
| | - Satomi Takei
- Laboratory of Gene Expression; Medical Research Institute; Tokyo Medical and Dental University; Bunkyo-ku, Tokyo, Japan
| | - Yutaka Suzuki
- Department of Medical Genome Science; University of Tokyo; Kashiwa, Chiba, Japan
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Yamanaka H, Harigai M, Inokuma S, Ishiguro N, Ryu J, Takei S, Takeuchi T, Tanaka Y, Sano Y, Koike T. THU0092 The advantage of early intervention by tocilizumab for rheumatoid arthritis - full analysis of all-case postmarketing surveillance in 7,901 patients in japan:. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2057] [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: 11/04/2022]
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Harigai M, Inokuma S, Ishiguro N, Ryu J, Takeuchi T, Takei S, Tanaka Y, Yamanaka H, Sano Y, Yaguramaki H, Koike T. SAT0120 Characteristics Associated with Better Effectiveness and Safety in Rheumatoid Arthritis Patients Treated with Intravenous Tocilizumab: Results from Full Analysis of All-Patient Postmarketing Surveillance in Japan. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1846] [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: 11/03/2022]
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Chiba Y, Takei S, Kawamura N, Kawaguchi Y, Sasaki K, Hasegawa-Ishii S, Furukawa A, Hosokawa M, Shimada A. Immunohistochemical localization of aggresomal proteins in glial cytoplasmic inclusions in multiple system atrophy. Neuropathol Appl Neurobiol 2013; 38:559-71. [PMID: 22013984 DOI: 10.1111/j.1365-2990.2011.01229.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS Multiple system atrophy (MSA) is pathologically characterized by the formation of α-synuclein-containing glial cytoplasmic inclusions (GCIs) in oligodendrocytes. However, the mechanisms of GCI formation are not fully understood. Cellular machinery for the formation of aggresomes has been linked to the biogenesis of the Lewy body, a characteristic α-synuclein-containing inclusion of Parkinson's disease and dementia with Lewy bodies. Here, we examined whether GCIs contain the components of aggresomes by immunohistochemistry. METHODS Sections from five patients with MSA were stained immunohistochemically with antibodies against aggresome-related proteins and analysed in comparison with sections from five patients with no neurological disease. We evaluated the presence or absence of aggresome-related proteins in GCIs by double immunofluorescence and immunoelectron microscopy. RESULTS GCIs were clearly immunolabelled with antibodies against aggresome-related proteins, such as γ-tubulin, histone deacetylase 6 (HDAC6) and 20S proteasome subunits. Neuronal cytoplasmic inclusions (NCIs) were also immunopositive for these aggresome-related proteins. Double immunofluorescence staining and quantitative analysis demonstrated that the majority of GCIs contained these proteins, as well as other aggresome-related proteins, such as Hsp70, Hsp90 and 62-kDa protein/sequestosome 1 (p62/SQSTM1). Immunoelectron microscopy demonstrated immunoreactivities for γ-tubulin and HDAC6 along the fibrils comprising GCIs. CONCLUSIONS Our results indicate that GCIs, and probably NCIs, share at least some characteristics with aggresomes in terms of their protein components. Therefore, GCIs and NCIs may be another manifestation of aggresome-related inclusion bodies observed in neurodegenerative diseases.
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Affiliation(s)
- Y Chiba
- Department of Pathology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
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Takei S, Hasegawa-Ishii S, Uekawa A, Chiba Y, Umegaki H, Hosokawa M, Woodward DF, Watanabe K, Shimada A. Immunohistochemical demonstration of increased prostaglandin F₂α levels in the rat hippocampus following kainic acid-induced seizures. Neuroscience 2012; 218:295-304. [PMID: 22609937 DOI: 10.1016/j.neuroscience.2012.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 05/04/2012] [Accepted: 05/05/2012] [Indexed: 10/28/2022]
Abstract
Prostaglandin (PG) F(2α) is one of the major prostanoids biosynthesized by cyclooxygenases (COXs) from arachidonic acid. Although it has been reported that there is a selective surge in PGF(2α) production in the hippocampus during kainic acid (KA)-induced seizure activity, the precise intra-hippocampal distribution of PGF(2α) has not been elucidated due to the paucity of effective histological techniques for detecting PGs in tissues. We investigated the tissue distribution of PGF(2α) in the rat hippocampus 30 min after KA injection by developing fixation and immunohistological-staining methods. To detect PGF(2α) directly on histological sections, we used systemic perfusion fixation with water-soluble carbodiimide fixative, followed by immersion of the brains in Zamboni's fixative. We then performed immunofluorescence staining with anti-PGF(2α) antibody, with negative control experiments used to confirm the staining specificity. Definitive immunolabeling for PGF(2α) was evident most markedly in pyramidal cells of the hippocampal cornu Ammonis (CA) 3 sector and neurons of the hilus in KA-treated rats. Immunolabeling for PGF(2α) was also evident in granule cells of the dentate gyrus. Double immunfluorescence staining revealed that PGF(2α)-immunopositive neurons expressed cytosolic phospholipases A(2), COX-2, and FP receptor. These results suggest that the major source of PGF(2α) production immediately after KA injection was neurons of the hippocampal CA3 sector, hilus and dentate gyrus. These neurons exert PGF(2α)-mediated functions via FP receptors in an autocrine/paracrine manner and may play pathophysiological roles in the acute phase (30 min) of excitotoxicity.
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Affiliation(s)
- S Takei
- Division of Neuropathology, Department of Pathology, Institute for Developmental Research, Aichi Human Service Center, 713-8 Kamiya-cho, Kasugai, Aichi 480-0392, Japan
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Mima T, Ishikawa S, Aoki C, Yoshio-Hoshino N, Adachi Y, Imagawa T, Mori M, Tomiita M, Iwata N, Murata T, Miyoshi M, Takei S, Aihara Y, Yokota S, Matsubara K, Nishimoto N. Interleukin 11 and paired immunoglobulin-like type 2 receptor α expression correlates with the number of joints with active arthritis in systemic juvenile idiopathic arthritis. Ann Rheum Dis 2009; 68:286-7. [DOI: 10.1136/ard.2008.091041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ishikawa S, Mima T, Aoki C, Yoshio-Hoshino N, Adachi Y, Imagawa T, Mori M, Tomiita M, Iwata N, Murata T, Miyoshi M, Takei S, Aihara Y, Yokota S, Matsubara K, Nishimoto N. Abnormal expression of the genes involved in cytokine networks and mitochondrial function in systemic juvenile idiopathic arthritis identified by DNA microarray analysis. Ann Rheum Dis 2008; 68:264-72. [DOI: 10.1136/ard.2007.079533] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objectives:Systemic juvenile idiopathic arthritis (sJIA) is a rheumatic disease in childhood characterised by systemic symptoms and a relatively poor prognosis. Peripheral leukocytes are thought to play a pathological role in sJIA although the exact cause of the disease is still obscure. In this study, we aimed to clarify cellular functional abnormalities in sJIA.Methods:We analysed the gene expression profile in peripheral leukocytes from 51 patients with sJIA, 6 patients with polyarticular type JIA (polyJIA) and 8 healthy children utilising DNA microarrays. Gene ontology analysis and network analysis were performed on the genes differentially expressed in sJIA to clarify the cellular functional abnormalities.Result:A total of 3491 genes were differentially expressed in patients with sJIA compared to healthy individuals. They were functionally categorised mainly into a defence response group and a metabolism group according to gene ontology, suggesting the possible abnormalities in these functions. In the defence response group, molecules predominantly constituting interferon (IFN)γ and tumour necrosis factor (TNF) network cascades were upregulated. In the metabolism group, oxidative phosphorylation-related genes were downregulated, suggesting a mitochondrial disorder. Expression of mitochondrial DNA-encoded genes including cytochrome c oxidase subunit 1(MT-CO1) and MT-CO2 were suppressed in patients with sJIA but not in patients with polyJIA or healthy children. However, nuclear DNA-encoded cytochrome c oxidases were intact.Conclusion:Our findings suggest that sJIA is not only an immunological disease but also a metabolic disease involving mitochondria disorder.
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Imaoka H, Hoshino T, Takei S, Kinoshita T, Okamoto M, Kawayama T, Kato S, Iwasaki H, Watanabe K, Aizawa H. Interleukin-18 production and pulmonary function in COPD. Eur Respir J 2007; 31:287-97. [PMID: 17989120 DOI: 10.1183/09031936.00019207] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Interleukin (IL)-18 production and pulmonary function were evaluated in patients with chronic obstructive pulmonary disease (COPD) in order to determine the role of IL-18 in COPD. Immunohistochemical techniques were used to examine IL-18 production in the lungs of patients with very severe COPD (Global Initiative for Chronic Obstructive Lung Disease (GOLD) stage IV, n = 16), smokers (n = 27) and nonsmokers (n = 23). Serum cytokine levels and pulmonary function were analysed in patients with GOLD stage I-IV COPD (n = 62), smokers (n = 34) and nonsmokers (n = 47). Persistent and severe small airway inflammation was observed in the lungs of ex-smokers with very severe COPD. IL-18 proteins were strongly expressed in alveolar macrophages, CD8+ T-cells, and both the bronchiolar and alveolar epithelia in the lungs of COPD patients. Serum levels of IL-18 in COPD patients and smokers were significantly higher than those in nonsmokers. Moreover, serum levels of IL-18 in patients with GOLD stage III and IV COPD were significantly higher than in smokers and nonsmokers. There was a significant negative correlation between serum IL-18 level and the predicted forced expiratory volume in one second in patients with COPD. In contrast, serum levels of IL-4, IL-13 and interferon-gamma were not significantly increased in any of the three groups. In conclusion, overproduction of interleukin-18 in the lungs may be involved in the pathogenesis of chronic obstructive pulmonary disease.
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Affiliation(s)
- H Imaoka
- Division of Respirology, Neurology and Rheumatology, Dept of Medicine, Kurume University School of Medicine, Kurume, Fukuoka 830-0011, Japan
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Ruperto N, Garcia-Munitis P, Villa L, Pesce M, Aggarwal A, Fasth A, Avcin T, Bae SC, Balogh Z, Li C, De Inocencio J, Dibra M, Dolezalova P, El Miedany Y, Flato B, Harjacek M, Huppertz HI, Kanakoudi-Tsakalidou F, Wulffraat N, Lahdenne P, Melo-Gomes JA, Mihaylova D, Nielsen S, Nikishina I, Ozdogan H, Pagava K, Panaviene V, Prieur AM, Romicka AM, Rumba I, Shafaie N, Susic G, Takei S, Uziel Y, Vesely R, Woo P, Martini A. PRINTO/PRES international website for families of children with rheumatic diseases: www.pediatric-rheumatology.printo.it. Ann Rheum Dis 2005; 64:1101-6. [PMID: 15760930 PMCID: PMC1755575 DOI: 10.1136/ard.2004.030221] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To prepare a website for families and health professionals containing up to date information about paediatric rheumatic diseases (PRD). METHODS Firstly, paediatric rheumatology centres and family self help associations were surveyed to characterise current clinical practice of physicians providing care for children with PRD, research activities, and training facilities of each centre. Secondly, international consensus was reached on the content of the website. Finally, the website was developed and the texts translated. RESULTS The web page contains three main sections: (a) description for families of the characteristics of 15 PRD; (b) list of paediatric rheumatology centres; (c) contact information for family self help associations. A version for 45 countries in 52 languages (with another three in progress) is now available on the web. 291 surveys from 171 centres and 102 family associations were received from 42 countries. The median proportion of time spent in paediatric practice in the centres examined was 100%, with 70% of this time dedicated to paediatric rheumatology. 90% of the centres were willing to perform clinical trials in the future. CONCLUSIONS The PRINTO/PRES website provides a well defined and competent set of information about PRD, with appropriate multiple translated versions and easy web navigational direction.
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Affiliation(s)
- N Ruperto
- Paediatric Rheumatology INternational Trials Organisation (PRINTO), IRCCS G. Gaslini, Pediatria II Reumatologia, Largo Gaslini, 5, 16147 Genova, Italy.
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Takei S, Takeuchi T, Yokosawa K. Effect of attention in the peripheral cuing effect. J Vis 2004. [DOI: 10.1167/4.8.452] [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: 11/24/2022] Open
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Baba Y, Honma T, Takei S, Suzuki K, Arai F, Kobayashi M, Sugimura K, Narisawa R, Takahashi T, Asakura H, Tomiyama K, Ajioka Y. [A case of ulcerative colitis with Sweet's syndrome]. Nihon Shokakibyo Gakkai Zasshi 2001; 98:1278-82. [PMID: 11729655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Y Baba
- Third Department of Internal Medicine, Niigata University School of Medicine
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Reiff A, Zastrow M, Sun BC, Takei S, Mitsuhada H, Bernstein B, Durden DL. Treatment of collagen induced arthritis in DBA/1 mice with L-asparaginase. Clin Exp Rheumatol 2001; 19:639-46. [PMID: 11791634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate the safety and efficacy of L-asparaginase as an immunosuppressive agent in a mouse model of rheumatoid arthritis. METHODS Male DBA/1 mice with collagen-induced arthritis (CIA) were treated at different intervals with various doses of native and pegylated L-asparaginase from E. coli. The mice were observed for 4 weeks during which time arthritis was scored. Outcome parameters included effect on severity and progression of established arthritis as well as prevention of disease. In addition, X-rays from the affected joints were obtained for comparison. RESULTS Both native L-asparaginase at a dose of 50 IU/injection intraperitoneally three days a week and pegylated asparaginase (PEG-L-asparaginase) at a dose of 25 IU/injection twice a week, significantly reduced the mean arthritic score (MAS) in mice with established arthritis (p < 0.001 for PEG-L-asparaginase). When native L-asparaginase was administered before the onset of arthritis (days 14-post immunization) the number of mice developing arthritis as well as the number of arthritic paws and the severity of arthritis in the treatment group were significantly decreased (p < 0.0001). Significant differences were found in the X-ray evaluation between treated and control mice. None of the animals died due to drug related events or showed signs of asparaginase induced toxicity. CONCLUSION Our data provide the first direct evidence that L-asparaginase is a potent antiarthritic agent and may represent an effective second line agent for future treatment studies in juvenile and adult rheumatoid arthritis.
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Affiliation(s)
- A Reiff
- Division of Rheumatology, Childrens Hospital Los Angeles, California 90027, USA.
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Nerome Y, Imanaka H, Maeno N, Mori H, Akaike H, Shigemori M, Takei S, Hokonohara M, Miyata K. [A case of primary Sjögren syndrome with repeated purpura]. Ryumachi 2001; 41:864-8. [PMID: 11729665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
Abstract
In Sjögren syndrome, purpura is one of its various well known eruptions. Although this disease state is assumed to be based on hypergammaglobulinemia, the details of its mechanism are unknown. We experienced a case involving a female patient with primary Sjögren syndrome showing repeated purpura on the legs, and examined her blood viscosity and histopathology. This girl developed Sjögren syndrome and was admitted to our hospital at 12-years-old. She underwent steroid treatment because of aggravation of the xerosis state and prominent purpura on the legs. Hypergammaglobulinemia was improved during the course; however, purpura appeared repeatedly. Although her blood viscosity was slightly higher than normal, this had no relation to purpura and serum gamma globulin values. Skin biopsy revealed necrotizing angiitis. These results suggest that the purpura of this case was caused not only by hyperviscosity from the hypergammaglobulinemia but also involvement of vasculitis by the primary disease.
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Affiliation(s)
- Y Nerome
- Deprtment of Pediatrics and School of Health Sciences, Faculty of Medicine, Kagoshima University, Kagoshima-city
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Yamazaki T, Ichige T, Takei S, Kawashita S, Kitazume T, Kubota T. Effect of allylic CH(3-n)F(n) groups (n = 1-3) on pi-facial diastereoselection. Org Lett 2001; 3:2915-8. [PMID: 11529789 DOI: 10.1021/ol016401g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text]. Michael addition of various enolates toward gamma-CH(3-n)F(n)-alpha,beta-unsaturated ketones (n = 1-3) was proven to smoothly furnish the 1,4-adducts with high si face selectivities which monotonously decreased by reduction in the number of fluorines. Although the Felkin-Anh model correctly anticipates the present stereochemical outcome only with E-acceptors, the hyperconjugative stabilization of transition states by electron donation from the allylic substituents (the Cieplak rule) successfully explains the pi-facial preference of both acceptors at least in a qualitative level.
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Affiliation(s)
- T Yamazaki
- Department of Bioengineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.
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Takei S, Groh D, Bernstein B, Shaham B, Gallagher K, Reiff A. Safety and efficacy of high dose etanercept in treatment of juvenile rheumatoid arthritis. J Rheumatol 2001; 28:1677-80. [PMID: 11469478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
OBJECTIVE To evaluate safety and efficacy of high dose etanercept (> 0.8 mg/kg, maximum 25 mg subcutaneously twice weekly) (Enbrel) in children with juvenile rheumatoid arthritis (JRA) and inadequate prior response to standard dose etanercept. METHODS Retrospective chart review of 8 children (6 girls, 2 boys, mean age 8.4 yrs, range 5-16 yrs). Five children had systemic onset, polyarticular course JRA; 2 had polyarticular onset; and one had pauciarticular onset, polyarticular course JRA. All children had failed at least 3 mo (mean 9 mo) treatment with standard dose etanercept (0.4 mg/kg SC twice a week). All 8 children had increase in the etanercept dose to at least 0.8 mg/kg (mean 1.1 mg/kg, maximum 25 mg SC twice weekly) for a mean of 7 mo (range 3-10 mo). Efficacy of high dose etanercept was evaluated by changes in joint count, laboratory data, and ability to decrease concomitant medication. RESULTS Improvements in the joint count and laboratory findings (erythrocyte sedimentation rate, hemoglobin and platelet count) were observed in 2 of 8 (25%) children. In these 2, concomitant prednisone was reduced or discontinued. In contrast, no changes in disease activity or laboratory findings were observed in the other 6 children. Overall, high dose etanercept was well tolerated. No laboratory abnormalities were detected and no child withdrew because of adverse events. CONCLUSION High dose etanercept is safe and well tolerated in children, but efficacy seems limited. In children with unsatisfactory response to standard dose etanercept, an increased dose or treatment prolongation may not offer any additional benefit.
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Affiliation(s)
- S Takei
- Department of Pediatrics, Keck School of Medicine, University of Southern California, Children's Hospital Los Angeles, USA.
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Takei S. [Systemic lupus erythematosus in childhood]. Ryoikibetsu Shokogun Shirizu 2001:462-5. [PMID: 11269136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- S Takei
- Department of Pediatrics, Faculty of Medicine, Kagoshima University
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Maeno N, Takei S. [Juvenile rheumatoid arthritis]. Ryoikibetsu Shokogun Shirizu 2001:458-61. [PMID: 11269135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- N Maeno
- Department of Pediatrics, Faculty of Medicine, Kagoshima University
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Abstract
OBJECTIVE To evaluate the safety and efficacy of the tumor necrosis factor fusion protein etanercept in children with treatment-resistant uveitis. METHODS Ten children with chronic active uveitis (7 girls and 3 boys, mean age 7.5 years [range 3-12 years]) were enrolled in this prospective study. In 7 children, uveitis was associated with pauciarticular juvenile rheumatoid arthritis. Five children were antinuclear antibody positive. All patients had failed previous therapy with topical steroids and methotrexate and/or cyclosporine. All were treated with etanercept at a dosage of 0.4 mg/kg twice weekly for the first 3 months, and then, if eyes did not improve, with 25 mg twice weekly (mean 1.1 mg/kg) for at least 3 additional months. RESULTS At the beginning of the trial, uveitis affected 18 eyes in the 10 children. Within 3 months, 10 of 16 affected eyes (63%; P = 0.017) showed a rapid decrease in anterior chamber cell density, including remission of uveitis in 4 eyes. In children with visual acuity of less than 20/25, 4 of 10 eyes (40%) improved. An exacerbation of uveitis during etanercept therapy occurred in only 1 child (1 of 14 eyes [7%]). Other ocular outcome parameters, such as intraocular pressure, synechia formation, and lens clarity, remained unchanged. Following a dosage increase to an average of 1.1 mg/kg after 3 months in 7 children, no further improvement was noted. CONCLUSION Our data suggest that etanercept injected subcutaneously twice a week has a beneficial effect on treatment-resistant chronic uveitis in children. Further controlled studies with etanercept in systemic or topical form are necessary to confirm its efficacy and optimal mode of administration.
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Affiliation(s)
- A Reiff
- Division of Rheumatology, Children's Hospital Los Angeles, California 90027, USA
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Vacha M, Takei S, Suzuki H, Hashizume KI, Tani T. Sub-wavelength region spectroscopy and local morphology of individual mesoscopic quantum systems. J Microsc 2001; 202:391-4. [PMID: 11309101 DOI: 10.1046/j.1365-2818.2001.00828.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Results of reflection microscopy and local reflection spectroscopy of J-aggregates of two pseudoisocyanine dyes in a thin film polymer matrix are reported. The individual J-aggregates assemble into fibre-like shapes of large structural heterogeneity. Reflectance spectra obtained at different samples, different locations on one sample and even at different positions of the same aggregate fibre reveal a wide distribution of optical properties. The shapes and absolute reflectivities of the spectra are suggested to originate from varying strengths of exciton-photon interaction and from the effect of finite thickness of the aggregate fibres. Polarization dependence measurements of local reflectivities provide orientations of the exciton transition dipole moments at 572 nm and 540 nm with respect to the orientation of the aggregate fibres. Furthermore, modified synthesis of capped semiconductor nanocrystals of CdSe is presented. The method yields high quality quantum dots suitable for microscopic imaging and spectroscopy.
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Affiliation(s)
- M Vacha
- Department of Applied Physics, Tokyo University of Agriculture and Technology, 2-24-16 Naka-machi, Koganei, Tokyo 184-8588, Japan
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Maeno N, Takei S, Imanaka H, Oda H, Yanagi K, Hayashi Y, Miyata K. Anti-alpha-fodrin antibodies in Sjögren's syndrome in children. J Rheumatol 2001; 28:860-4. [PMID: 11327263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
OBJECTIVE To investigate the prevalence of anti-alpha-fodrin antibody specific for adult Sjögren's syndrome (SS) in patients with juvenile onset SS. METHODS Serum anti-alpha-fodrin antibody was examined in 15 patients with juvenile SS (11 cases of primary SS and 4 secondary SS) and in 16 children with systemic lupus erythematosus (SLE) by Western blot analysis using a recombinant 120 kDa alpha-fodrin fusion protein. RESULTS All the 15 serum samples from patients with SS reacted with a recombinant alpha-fodrin fusion protein in Western blot analysis. In contrast, reactivity was found in only 2 of the 16 patients with SLE. The clinical features of the 15 patients with juvenile onset SS were very specific; only 4 patients complained of dryness, while 6 had abnormal excretion ability. Salivary gland enlargement was the most common clinical manifestation. Characteristic laboratory findings in juvenile onset SS included a higher prevalence of antinuclear antibodies, anti-SSA/Ro antibodies, and rheumatoid factor, as well as increased erythrocyte sedimentation rate and hypergammaglobulinemia. CONCLUSION The pathogenesis of juvenile SS seems to be the same as that of adult SS, although subjective symptoms of dryness are less frequent in juvenile cases. This discrepancy may indicate that SS is a slowly progressive disease with a long time span. The anti-alpha-fodrin antibody is likely to be a reliable diagnostic marker for juvenile SS.
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Affiliation(s)
- N Maeno
- Department of Pediatrics, Faculty of Medicine, Kagoshima University, Kagoshima City, Japan
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Abstract
Symptoms of early onset sarcoidosis characterized by skin eruptions, arthritis, and uveitis mimic those of systemic type juvenile rheumatoid arthritis (JRA). We report 2 Japanese patients with early onset sarcoidosis, both of whom were initially diagnosed and treated as having JRA. Intermittent fever and synovial swelling may mask sarcoidosis in children less than 4 years old.
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Affiliation(s)
- S Yotsumoto
- Department of Dermatology, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890, Japan.
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Nakazawa T, Yano M, Suzuki K, Takei S, Kobayashi I. [Efficacy of preventive treatment for complications in percutaneous endoscopic gastrostomy in elderly]. Nihon Ronen Igakkai Zasshi 2000; 37:613-8. [PMID: 11086386 DOI: 10.3143/geriatrics.37.613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
From September 1995 through May 1999, percutaneous endoscopic gastrostomy (PEG) was performed in 47 elderly patients, aged 65 to 93 (average 78.9). Several treatments were additionally performed to prevent serious complications in these cases, and their usefulness and problems were investigated. Gastropexy was performed to prevent peritonitis in cases of self-removal of tubes in the acute stage. Intraoperative fluoroscopy was used prevent perforation of the intestines. However, re-insertion of the endoscopic, which was necessary with the push method, was omitted to reduce the burden on the patients. In patients with tube troubles in the chronic stage such as the buried bumper syndrome or self-removal, the existing fistula was preserved and the gastrostomy was reconstructed using a narrow polyvinyl chloride tube and a flexible guide wire to prevent peritonitis by erroneous insertion of the tube. In terms of results, gastropexy was useful to prevent peritonitis in one patient with early self-removal of the tube. Data to evaluate the usefulness of fluoroscopy in preventing perforation of the intestine were insufficient, so more patients need to be studied in the future. Even when confirmation of the location of the internal bumper by endoscopy was omitted, there was no case of poor traction of the bumper, so this procedure seems unnecessary. Review of tube troubles, in the chronic stage revealed no case of peritonitis caused by erroneous insertion of tubes or erroneous injection of nutrients with our reconstruction methods, and complete reconstruction of the gastrostomy with preservation of the existing fistula appeared to be possible. However, those additional treatments require extension of the operation time and rise in cost with increased use of medical instruments, so the indications should be carefully considered.
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Affiliation(s)
- T Nakazawa
- Department of Internal Medicine, Kariwa County General Hospital
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Abstract
The effect of a male steroid hormone, 5DHT, on the expression of TNF-alpha was examined using a human leukemia T cell line, Jurkat. Cells were treated with 5DHT in the presence or absence of PHA, and RNA was isolated followed by a reverse transcriptase - mediated PCR (RT-PCR) to measure the steady state levels of TNF-alpha mRNA. The treatment of cells with 5DHT resulted in a 50% of decrease in the level of TNF-alpha mRNA compared to that in untreated conditions (basal level). A similar level of reduction of the message by 5DHT was also observed in PHA-stimulated cells. The reduction of the steady state levels of TNF-alpha mRNA in Jurkat cells was a result of destabilization of the gene as demonstrated by actinomycin D treatment; a half-life of TNF-alpha message in 5DHT treated cells and non-treated cells was 1 hr and 2.5 hr, respectively, whereas that in 5DHT/PHA and PHA-treated cells was 3hr and 6hr, respectively.
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Affiliation(s)
- S Takei
- Department of Medicine, Cedars-Sinai Medical Center, UCLA School of Medicine, Los Angeles, California 90048, USA
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Abstract
OBJECTIVE The aim of this study is to describe the long-term outcome of preserved hearing after vestibular schwannoma surgery. METHODS Subjects are 20 unilateral vestibular schwannoma patients whose class A hearing of the AAO-HNS classification was preserved successfully after tumor removal. Hearing preservation surgery was attempted via the middle cranial fossa (MCF) or the extended MCF approach. The follow-up periods ranged from 2 to 16 years. The outcome measures included the pure tone average (PTA) and speech discrimination score (SDS). RESULTS PTA was maintained in less than 30 dB in 11 out of 20 patients within 2 years follow-up, six out of 13 patients within 4 years follow-up, and two out of five patients within 6 years follow-up, respectively. SDS was maintained in more than 70% in 17 out of 20 patients within 2 years follow-up, ten out of 13 patients within 4 years follow-up, and three out of five patients within 6 years follow-up, respectively. CONCLUSIONS The preserved hearing maintained about more than 40% of the patients with the class A hearing in every 2 years follow-up. From this result, we can conclude that the hearing preservation surgery could be one of the best treatments for vestibular schwannoma patients with class A hearing. However, further study will be needed to clarify the mechanism of the deterioration in hearing after hearing preservation surgery.
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Affiliation(s)
- Y Inoue
- Department of Otolaryngology, School of Medicine, Keio University, Tokyo, Japan
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Ninomiya K, Nomura Y, Takei S. Large coronary aneurysms in a child with suspected Behçet's disease. J Rheumatol 2000; 27:278-9. [PMID: 10648056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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Maeno N, Takei S, Imanaka H, Takasaki I, Kitajima I, Maruyama I, Matsuo K, Miyata K. Increased circulating vascular endothelial growth factor is correlated with disease activity in polyarticular juvenile rheumatoid arthritis. J Rheumatol 1999; 26:2244-8. [PMID: 10529148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
OBJECTIVE To investigate the relevance of vascular endothelial growth factor (VEGF) in the pathogenesis of juvenile rheumatoid arthritis (JRA). METHODS Serum VEGF levels in 58 patients with JRA (systemic in 17, polyarticular in 29, pauciarticular in 12) were measured by ELISA and compared with those of 21 patients with infectious diseases and 50 healthy children. Correlations of VEGF levels with number of joints with active arthritis, erythrocyte sedimentation rate (ESR), and hyaluronic acid (HA) were examined. RESULTS Serum levels of VEGF in patients with JRA were significantly higher than in healthy controls. Patients with systemic and polyarticular JRA showed statistically higher levels of VEGF than those with infectious diseases. VEGF levels correlated statistically with C-reactive protein (CRP) in patients with both infectious diseases and polyarticular JRA, but the regression slope (VEGF/CRP) was much steeper in polyarticular JRA than in infectious diseases. Serum VEGF levels correlated with disease activity variables such as the number of joints with active arthritis, ESR, and serum HA levels in polyarticular JRA. CONCLUSION The correlation of serum VEGF levels and disease activity in polyarticular JRA suggests that VEGF may take an active part in joint inflammation.
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Affiliation(s)
- N Maeno
- Department of Pediatrics, Faculty of Medicine, Kagoshima University, Kagoshima City, Japan
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Maeno N, Yoshinaga M, Takei S, Nishi J, Imanaka H, Wahid MR, Sameshima K, Miyata K. Anti-M protein antibody in post-streptococcal reactive arthritis. J Rheumatol 1999; 26:1417-9. [PMID: 10381072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
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