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Arai S, Yamaoka Y, Shiomi A, Kagawa H, Hino H, Manabe S, Chen K, Nanishi K, Maeda C, Notsu A, Kinugasa Y. Efficacy of laparoscopic surgery for loop colostomy: a propensity-score-matched analysis. Tech Coloproctol 2023; 27:1319-1326. [PMID: 37725263 DOI: 10.1007/s10151-023-02856-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 08/09/2023] [Indexed: 09/21/2023]
Abstract
PURPOSE Colostomy is a common procedure for fecal diversion, but the optimal colostomy approach is unclear in terms of surgical outcomes and stoma-related complications. The purpose of this study was to examine the efficacy and feasibility of laparoscopic loop colostomy. METHODS This retrospective cohort study included patients who underwent loop colostomy at Shizuoka Cancer Center in Japan between April 2010 and March 2022. Patients were divided into two groups based on surgical approach: the laparoscopic (LAP) and open (OPEN) groups. Surgical outcomes and the incidences of stoma-related complications such as stomal prolapse (SP), parastomal hernia (PSH), and skin disorders (SD) were compared with and without propensity score matching. RESULTS Of the 388 eligible patients, 180 (46%) were in the LAP group and 208 (54%) were in the OPEN group. The male-to-female ratio was 5.5:4.5 in the Lap group and was 5.3:4.7 in the OPEN group, respectively. The median age was 68 years (range, 31-88 years) in the LAP group and 65 years (range, 23-93 years) in the OPEN group, respectively. The LAP group, compared with the OPEN group, had a shorter operative time and lower incidences of surgical site infection (3.9% versus 16.3%, respectively; p < 0.01) and SD (11.7% versus 24.5%, respectively; p < 0.01). There was no significant difference between the LAP and OPEN groups in the incidence of SP (17.3% versus 17.3%, respectively) or PSH (8.9% versus 6.7%, respectively). After propensity score matching, the incidences of surgical site infection and SD were significantly lower in the LAP group than in the OPEN group, while there were no significant differences in the operative time or the incidences of SP and PSH. CONCLUSION Our results suggest that laparoscopic surgery could be beneficial and feasible in loop colostomy.
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Affiliation(s)
- S Arai
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
- Department of Gastrointestinal Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Y Yamaoka
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan.
| | - A Shiomi
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - H Kagawa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - H Hino
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - S Manabe
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - K Chen
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - K Nanishi
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - C Maeda
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center, Shizuoka, Japan
| | - A Notsu
- Clinical Research Promotion Unit, Shizuoka Cancer Center, Shizuoka, Japan
| | - Y Kinugasa
- Department of Gastrointestinal Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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Osako M, Yamaoka Y, Takeuchi C, Mochizuki Y, Fujiwara T. Health care transition for cerebral palsy with intellectual disabilities: A systematic review. Rev Neurol (Paris) 2023:S0035-3787(23)00820-2. [PMID: 36870883 DOI: 10.1016/j.neurol.2022.11.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 10/05/2022] [Accepted: 11/12/2022] [Indexed: 03/06/2023]
Abstract
OBJECTIVE Today, most individuals with cerebral palsy are adults who need a paediatric-to-adult health care transition. However, many remain in paediatric care for treatment of adult-onset health issues. Therefore, a systematic review based on the 'Triple Aim' framework was performed to determine the status of paediatric-to-adult health care transition for people with cerebral palsy. A comprehensive evaluation of transitional care was proposed for using this framework. It consists of 'experience of care', meaning satisfaction with the care, 'population health', meaning the well-being of patients, and 'cost', meaning cost-effectiveness. METHOD Electronic database (PubMed) searches were performed. The inclusion criteria were original articles published between 1990 and 2020. The search terms used in this study were ('cerebral palsy' AND 'transition to adult health care') OR ('cerebral palsy' AND 'transition'). The study type had to be epidemiological, case report, case-control, and cross-sectional, but not qualitative. The outcomes of the studies were categorised into 'care experience', 'population health', and 'cost', according to the Triple Aim framework. RESULTS Thirteen articles met the abovementioned inclusion criteria. Few studies have examined the effect of the intervention of transition for young adults with cerebral palsy. Participants in some studies had no intellectual disability. Young adults were dissatisfied with the 'care experience', 'population health', and 'cost' and had unmet health needs and inadequate social participation. INTERPRETATION Further transition intervention studies with a comprehensive assessment and proactive involvement of individuals are warranted. The presence of an intellectual disability should be considered.
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Affiliation(s)
- M Osako
- Department of Neurology, Tokyo Metropolitan Kita Medical and Rehabilitation Center for the Disabled, 1-2-3 Jujodai, Kita-ku, Tokyo 114-0033, Japan.
| | - Y Yamaoka
- Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan
| | - C Takeuchi
- Department of Neurology, Tokyo Metropolitan Kita Medical and Rehabilitation Center for the Disabled, 1-2-3 Jujodai, Kita-ku, Tokyo 114-0033, Japan
| | - Y Mochizuki
- Department of Neurology, Tokyo Metropolitan Kita Medical and Rehabilitation Center for the Disabled, 1-2-3 Jujodai, Kita-ku, Tokyo 114-0033, Japan
| | - T Fujiwara
- Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan
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Ino Y, Yamaoka Y, Tanaka K, Miyakawa K, Nishi M, Hatayama Y, Kimura H, Kimura Y, Ryo A. Integrated tandem affinity protein purification using the polyhistidine plus extra 4 amino acids (HiP4) tag system. Proteomics 2023; 23:e2200334. [PMID: 36807525 DOI: 10.1002/pmic.202200334] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 02/03/2023] [Accepted: 02/13/2023] [Indexed: 02/22/2023]
Abstract
Peptide tag systems are a robust biophysical and biochemical method that is widely used for protein detection and purification. Here, we developed a novel tag system termed "HiP4" (histidine plus four amino acids) whose epitope sequence comprises only seven amino acids (HHHDYDI) that partially overlap with the conventional 6x histidine tag (6xHis-tag). We produced a monoclonal antibody against the HiP4 tag that can be used in multiple immunoassays with high specificity and affinity. Using this system, we developed a tandem affinity purification (TAP) and mass spectrometry (TAP-MS) system for comprehensive protein interactome analysis. The integrated use of nickel bead purification followed by HiP4 tag immunoprecipitation made it possible to reduce nonspecific binding and improve selectivity, leading to the recovery of previously unrecognized proteins that interact with hepatitis B virus X (HBx) protein or TAR DNA-binding protein 43 (TARDBP or TDP-43). Our results indicate that this system may be viable as a simple and powerful tool for TAP-MS that can achieve low background and high selectivity in comprehensive protein-protein interaction analyses.
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Affiliation(s)
- Yoko Ino
- Advanced Medical Research Center, Yokohama City University, Yokohama, Kanagawa, Japan.,Department of Health Science, Gunma Paz University Graduate School of Health Sciences, Takasaki, Gunma, Japan
| | - Yutaro Yamaoka
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co. Inc., Isehara, Kanagawa, Japan.,Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Kiho Tanaka
- Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Kei Miyakawa
- Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan.,Center for Influenza and Respiratory Virus Research, National Institute of Infectious Diseases, Tokyo, Japan
| | - Mayuko Nishi
- Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Yasuyoshi Hatayama
- Advanced Medical Research Center, Yokohama City University, Yokohama, Kanagawa, Japan.,Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Hirokazu Kimura
- Department of Health Science, Gunma Paz University Graduate School of Health Sciences, Takasaki, Gunma, Japan
| | - Yayoi Kimura
- Advanced Medical Research Center, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Akihide Ryo
- Advanced Medical Research Center, Yokohama City University, Yokohama, Kanagawa, Japan.,Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Kanagawa, Japan.,Department of Virology III, National Institute of Infectious Diseases, Tokyo, Japan
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Nakai Y, Miyakawa K, Yamaoka Y, Hatayama Y, Nishi M, Suzuki H, Kimura H, Takahashi H, Kimura Y, Ryo A. Generation and Utilization of a Monoclonal Antibody against Hepatitis B Virus Core Protein for a Comprehensive Interactome Analysis. Microorganisms 2022; 10:microorganisms10122381. [PMID: 36557634 PMCID: PMC9783060 DOI: 10.3390/microorganisms10122381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/22/2022] [Accepted: 11/29/2022] [Indexed: 12/05/2022] Open
Abstract
Hepatitis B virus (HBV) core antigen (HBc) is a structural protein that forms the viral nucleocapsid and is involved in various steps of the viral replication cycle, but its role in the pathogenesis of HBV infection is still elusive. In this study, we generated a mouse monoclonal antibody (mAb) against HBc and used it in antibody-based in situ biotinylation analysis in order to identify host proteins that interact with HBc. HBc antigen was produced with a wheat germ cell-free protein synthesis system and used to immunize mice. Among the established hybridoma clones, a single clone (mAb #7) was selected and further characterized for its ability in the antibody-based in situ biotinylation analysis to collect host proteins that are in the vicinity of HBc. Using mass spectrometry, we identified 215 HBc-interacting host proteins, three of which bind HBc most significantly under hypoxic conditions. Our results indicate that mAb #7 can be used to systematically identify host proteins that interact with HBc under pathophysiological conditions, and thus may be useful to explore the molecular pathways involved in HBV-induced cytopathogenesis.
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Affiliation(s)
- Yusuke Nakai
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
- Advanced Medical Research Center, Yokohama City University, Yokohama 236-0004, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara 259-1146, Japan
| | - Yasuyoshi Hatayama
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
- Advanced Medical Research Center, Yokohama City University, Yokohama 236-0004, Japan
| | - Mayuko Nishi
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
| | - Hidefumi Suzuki
- Department of Molecular Biology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
| | - Hirokazu Kimura
- Department of Health Science, Gunma Paz University Graduate School, Takasaki 370-0006, Japan
| | - Hidehisa Takahashi
- Department of Molecular Biology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
| | - Yayoi Kimura
- Advanced Medical Research Center, Yokohama City University, Yokohama 236-0004, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan
- Advanced Medical Research Center, Yokohama City University, Yokohama 236-0004, Japan
- Correspondence: ; Tel.: +81-45-787-2602
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5
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Maeda R, Fujita J, Konishi Y, Kazuma Y, Yamazaki H, Anzai I, Watanabe T, Yamaguchi K, Kasai K, Nagata K, Yamaoka Y, Miyakawa K, Ryo A, Shirakawa K, Sato K, Makino F, Matsuura Y, Inoue T, Imura A, Namba K, Takaori-Kondo A. A panel of nanobodies recognizing conserved hidden clefts of all SARS-CoV-2 spike variants including Omicron. Commun Biol 2022; 5:669. [PMID: 35794202 PMCID: PMC9257560 DOI: 10.1038/s42003-022-03630-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 06/24/2022] [Indexed: 12/15/2022] Open
Abstract
We are amid the historic coronavirus infectious disease 2019 (COVID-19) pandemic. Imbalances in the accessibility of vaccines, medicines, and diagnostics among countries, regions, and populations, and those in war crises, have been problematic. Nanobodies are small, stable, customizable, and inexpensive to produce. Herein, we present a panel of nanobodies that can detect the spike proteins of five SARS-CoV-2 variants of concern (VOCs) including Omicron. Here we show via ELISA, lateral flow, kinetic, flow cytometric, microscopy, and Western blotting assays that our nanobodies can quantify the spike variants. This panel of nanobodies broadly neutralizes viral infection caused by pseudotyped and authentic SARS-CoV-2 VOCs. Structural analyses show that the P86 clone targets epitopes that are conserved yet unclassified on the receptor-binding domain (RBD) and contacts the N-terminal domain (NTD). Human antibodies rarely access both regions; consequently, the clone buries hidden crevasses of SARS-CoV-2 spike proteins that go undetected by conventional antibodies. A panel of nanobodies are presented that can detect the spike proteins of five SARS-CoV-2 variants of concern and structural analyses show that one clone targets conserved epitopes on the receptor-binding domain and contacts the N-terminal domain.
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Kato H, Miyakawa K, Ohtake N, Yamaoka Y, Yajima S, Yamazaki E, Shimada T, Goto A, Nakajima H, Ryo A. Vaccine-induced humoral response against SARS-CoV-2 dramatically declined but cellular immunity possibly remained at 6 months post BNT162b2 vaccination. Vaccine 2022; 40:2652-2655. [PMID: 35370020 PMCID: PMC8960126 DOI: 10.1016/j.vaccine.2022.03.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [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: 10/29/2021] [Revised: 03/20/2022] [Accepted: 03/23/2022] [Indexed: 02/07/2023]
Abstract
To evaluate vaccine-induced humoral and cell-mediated immunity at 6 months after completion of two doses of BNT162b2 vaccination, immunoglobulin G against SARS-CoV-2 spike protein (SP IgG), 50% neutralizing antibody (NT50), and spot-forming cell (SFC) counts were evaluated by interferon-γ releasing ELISpot assay of 98 healthy subjects (median age, 43 years). The geometric mean titers of SP IgG and NT50 decreased from 95.2 (95% confidence interval (CI) 79.8–113.4) to 5.7 (95% CI 4.9–6.7) and from 680.4 (588.0–787.2) to 130.4 (95% CI 104.2–163.1), respectively, at 3 weeks and 6 months after the vaccination. SP IgG titer was negatively correlated with age and alcohol consumption. Spot-forming cell counts at 6 months did not correlate with age, gender, and other parameters of the patients. SP IgG, NT50, and SFC titers were elevated in the breakthrough infected subjects. Although the levels of vaccine-induced antibodies dramatically declined at 6 months after vaccination, a certain degree of cellular immunity was observed irrespective of the age.
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Affiliation(s)
- Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Yokohama, Japan; Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Norihisa Ohtake
- Bioscience Division, Research and Development Department, Tosoh Corporation, Tokyo Research Center, Kanagawa, Japan; Advanced Medical Research Center, Yokohama City University, Yokohama, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan; Life Science Laboratory, Technology and Development Division, Kanto Chemical Co, Inc., Isehara, Japan
| | - Satoshi Yajima
- Clinical Laboratory Department, Yokohama City University Hospital, Yokohama, Japan
| | - Etsuko Yamazaki
- Clinical Laboratory Department, Yokohama City University Hospital, Yokohama, Japan
| | - Tomoko Shimada
- Nursing Department, Yokohama City University Hospital, Yokohama, Japan
| | - Atsushi Goto
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Hideaki Nakajima
- Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan.
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Miyakawa K, Jeremiah SS, Yamaoka Y, Koyama T, Tokumasu R, Kudo M, Kato H, Ryo A. Molecular and Epidemiological Characterization of Emerging Immune-Escape Variants of SARS-CoV-2. Front Med (Lausanne) 2022; 9:811004. [PMID: 35223905 PMCID: PMC8866700 DOI: 10.3389/fmed.2022.811004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 01/10/2022] [Indexed: 12/26/2022] Open
Abstract
The successive emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants has presented a major challenge in the management of the coronavirus disease (COVID-19) pandemic. There are growing concerns regarding the emerging variants escaping vaccines or therapeutic neutralizing antibodies. In this study, we conducted an epidemiological survey to identify SARS-CoV-2 variants that are sporadically proliferating in vaccine-advanced countries. Subsequently, we created HiBiT-tagged virus-like particles displaying spike proteins derived from the variants to analyze the neutralizing efficacy of the BNT162b2 mRNA vaccine and several therapeutic antibodies. We found that the Mu variant and a derivative of the Delta strain with E484K and N501Y mutations significantly evaded vaccine-elicited neutralizing antibodies. This trend was also observed in the Beta and Gamma variants, although they are currently not prevalent. Although 95.2% of the vaccinees exhibited prominent neutralizing activity against the prototype strain, only 73.8 and 78.6% of the vaccinees exhibited neutralizing activity against the Mu and the Delta derivative variants, respectively. A long-term analysis showed that 88.8% of the vaccinees initially exhibited strong neutralizing activity against the currently circulating Delta strain; the number decreased to 31.6% for the individuals at 6 months after vaccination. Notably, these variants were shown to be resistant to several therapeutic antibodies. Our findings demonstrate the differential neutralization efficacy of the COVID-19 vaccine and monoclonal antibodies against circulating variants, suggesting the need for pandemic alerts and booster vaccinations against the currently prevalent variants.
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Affiliation(s)
- Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan
- *Correspondence: Kei Miyakawa
| | | | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa, Japan
| | - Takahiko Koyama
- International Business Machines Corporation Thomas J. Watson Research Center, New York, NY, United States
| | | | | | - Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Kanagawa, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan
- Akihide Ryo
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Ino Y, Nishi M, Yamaoka Y, Miyakawa K, Jeremiah SS, Osada M, Kimura Y, Ryo A. Phosphopeptide enrichment using Phos-tag technology reveals functional phosphorylation of the nucleocapsid protein of SARS-CoV-2. J Proteomics 2022; 255:104501. [PMID: 35093569 PMCID: PMC8800104 DOI: 10.1016/j.jprot.2022.104501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 08/24/2021] [Revised: 01/19/2022] [Accepted: 01/23/2022] [Indexed: 11/28/2022]
Abstract
Phosphorylation of viral proteins serves as a regulatory mechanism during the intracellular life cycle of infected viruses. There is therefore a pressing need to develop a method to efficiently purify and enrich phosphopeptides derived from viral particles in biological samples. In this study, we utilized Phos-tag technology to analyze the functional phosphorylation of the nucleocapsid protein (N protein; NP) of severe respiratory syndrome coronavirus 2 (SARS-CoV-2). Viral particles were collected from culture supernatants of SARS-CoV-2-infected VeroE6/TMPRSS2 cells by ultracentrifugation, and phosphopeptides were purified by Phos-tag magnetic beads for LC-MS/MS analysis. Analysis revealed that NP was reproducibly phosphorylated at serine 79 (Ser79). Multiple sequence alignment and phylogenetic analysis showed that the Ser79 was a distinct phospho-acceptor site in SARS-CoV-2 but not in other beta-coronaviruses. We also found that the prolyl-isomerase Pin1 bound to the phosphorylated Ser79 in NP and positively regulated the production of viral particles. These results suggest that SARS-CoV-2 may have acquired the potent virus-host interaction during its evolution mediated by viral protein phosphorylation. Moreover, Phos-tag technology can provide a useful means for analyzing the functional phosphorylation of viral proteins. Significance In this study, we aimed to investigate the functional phosphorylation of SARS-CoV-2 NP. For this purpose, we used Phos-tag technology to purify and enrich virus-derived phosphopeptides with high selectivity and reproducibility. This method can be particularly useful in analyzing viral phosphopeptides from cell culture supernatants that often contain high concentrations of fetal bovine serum and supplements. We newly identified an NP phosphorylation site at Ser79, which is important for Pin1 binding. Furthermore, we showed that the interaction between Pin1 and phosphorylated NP could enhance viral replication in a cell culture model.
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Affiliation(s)
- Yoko Ino
- Advanced Medical Research Center, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan; Graduate School of Health Sciences, Gunma Paz University, Tonyamachi 1-7-1, Takasaki-shi, Gunma 370-0006, Japan
| | - Mayuko Nishi
- Department of Microbiology, School of Medicine, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, School of Medicine, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan; Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Suzukawa 21, Isehara-shi, Kanagawa 259-1146, Japan
| | - Kei Miyakawa
- Department of Microbiology, School of Medicine, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Sundararaj Stanleyraj Jeremiah
- Department of Microbiology, School of Medicine, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Makoto Osada
- Graduate School of Health Sciences, Gunma Paz University, Tonyamachi 1-7-1, Takasaki-shi, Gunma 370-0006, Japan
| | - Yayoi Kimura
- Advanced Medical Research Center, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Akihide Ryo
- Advanced Medical Research Center, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan; Department of Microbiology, School of Medicine, Yokohama City University, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan.
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9
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Miyake S, Ashikari K, Kato S, Takatsu T, Kuwashima H, Kaneko H, Nagai K, Watari I, Sato T, Yamaoka Y, Yamamoto T, Ryo A, Maeda S, Nakajima A, Higurashi T. Severe acute respiratory syndrome coronavirus 2 prevalence in saliva and gastric and intestinal fluid in patients undergoing gastrointestinal endoscopy in coronavirus disease 2019 endemic areas: Prospective cross-sectional study in Japan. Dig Endosc 2022; 34:96-104. [PMID: 33548095 PMCID: PMC8014498 DOI: 10.1111/den.13945] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Gastrointestinal endoscopy (GIE) is useful for the early detection and treatment of many diseases; however, GIE is considered a high-risk procedure in the coronavirus disease 2019 (COVID-19) pandemic era. This study aimed to explore the rate of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) positivity in saliva and gastrointestinal fluids to which endoscopy medical staff are exposed. METHODS The study was a single-center cross-sectional study. From June 1 to July 31, 2020, all patients who underwent GIE at Yokohama City University Hospital were registered. All patients provided 3 mL of saliva. For upper GIE, 10 mL of gastric fluid was collected through the endoscope. For lower GIE, 10 mL of intestinal fluid was collected through the endoscope. The primary outcome was the positive rate of SARS-CoV-2 in saliva and gastrointestinal fluids. We also analyzed serum-specific antibodies for SARS-CoV-2 and patients' background information. RESULTS A total of 783 samples (560 upper GIE and 223 lower GIE samples) were analyzed. Polymerase chain reaction (PCR) on saliva samples did not show any positive results in either upper or lower GIE samples. However, 2.0% (16/783) of gastrointestinal fluid samples tested positive for SARS-CoV-2. No significant differences in age, sex, purpose of endoscopy, medication, or rate of antibody test positivity were found between PCR positive and PCR negative cases. CONCLUSIONS Asymptomatic patients, even those with no detectable virus in their saliva, had SARS-CoV-2 in their gastrointestinal tract. Endoscopy medical staff should be aware of infection when performing procedures. The study was registered as UMIN000040587.
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Affiliation(s)
- Shigeta Miyake
- Departments ofNeurosurgeryGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Keiichi Ashikari
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Shingo Kato
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan,Clinical Cancer GenomicsGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Tomohiro Takatsu
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | | | | | - Koki Nagai
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Ikue Watari
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Takamitsu Sato
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Yutaro Yamaoka
- Department of MicrobiologySchool of MedicineYokohama City UniversityKanagawaJapan,Life Science Laboratory, Technology and Development DivisionKanto Chemical Co., Inc.KanagawaJapan
| | - Tetsuya Yamamoto
- Departments ofNeurosurgeryGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Akihide Ryo
- Department of MicrobiologySchool of MedicineYokohama City UniversityKanagawaJapan
| | - Shin Maeda
- GastroenterologyYokohama City UniversityKanagawaJapan
| | - Atsushi Nakajima
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
| | - Takuma Higurashi
- Gastroenterology and HepatologyGraduate School of MedicineYokohama City UniversityKanagawaJapan
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10
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Miyakawa K, Kubo S, Stanleyraj Jeremiah S, Go H, Yamaoka Y, Ohtake N, Kato H, Ikeda S, Mihara T, Matsuba I, Sanno N, Miyakawa M, Shinkai M, Miyazaki T, Ogura T, Ito S, Kaneko T, Yamamoto K, Goto A, Ryo A. Persistence of Robust Humoral Immune Response in Coronavirus Disease 2019 Convalescent Individuals Over 12 Months After Infection. Open Forum Infect Dis 2021; 9:ofab626. [PMID: 35071683 PMCID: PMC8689844 DOI: 10.1093/ofid/ofab626] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/09/2021] [Indexed: 01/23/2023] Open
Abstract
Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection elicits varying degrees of protective immunity conferred by neutralizing antibodies (nAbs). In this study, we report the persistence of nAb responses over 12 months after infection despite their decreasing trend noticed from 6 months. Methods The study included sera from 497 individuals who had been infected with SARS-CoV-2 between January and August 2020. Samples were collected at 6 and 12 months after onset. The titers of immunoglobulin (Ig)G to the viral nucleocapsid protein (NP) and receptor-binding domain (RBD) of the spike protein were measured by chemiluminescence enzyme immunoassay. The nAb titer was determined using lentivirus-based pseudovirus or authentic virus. Results Antibody titers of NP-IgG, RBD-IgG, and nAbs were higher in severe and moderate cases than in mild cases at 12 months after onset. Although the nAb levels were likely to confer adequate protection against wild-type viral infection, the neutralization activity to recently circulating variants in some of the mild cases (~30%) was undermined, implying the susceptibility to reinfection with the variants of concerns (VOCs). Conclusions Coronavirus disease 2019 convalescent individuals have robust humoral immunity even at 12 months after infection albeit that the medical history and background of patients could affect the function and dynamics of antibody response to the VOCs.
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Affiliation(s)
- Kei Miyakawa
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Sousuke Kubo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | | | - Hirofumi Go
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co, Inc., Kanagawa, Japan
| | - Norihisa Ohtake
- Advanced Medical Research Center, Yokohama City University, Yokohama, Japan
- Bioscience Division, Research and Development Department, Tosoh Corporation, Tokyo Research Center, Kanagawa, Japan
| | - Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Kanagawa, Japan
| | - Satoshi Ikeda
- Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Kanagawa, Japan
| | - Takahiro Mihara
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Kanagawa, Japan
| | | | | | - Masaaki Miyakawa
- Miyakawa Internal Medicine and Pediatrics Clinic, Kanagawa, Japan
- Japan Medical Association, Tokyo, Japan
| | - Masaharu Shinkai
- Division of Internal Medicine, Tokyo-Shinagawa Hospital, Tokyo, Japan
| | - Tomoyuki Miyazaki
- Department of Physiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Takashi Ogura
- Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Kanagawa, Japan
| | - Shuichi Ito
- Department of Pediatrics, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Takeshi Kaneko
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Kouji Yamamoto
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Atsushi Goto
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Kanagawa, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
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11
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Kato H, Miyakawa K, Ohtake N, Go H, Yamaoka Y, Yajima S, Shimada T, Goto A, Nakajima H, Ryo A. Antibody titers against the Alpha, Beta, Gamma, and Delta variants of SARS-CoV-2 induced by BNT162b2 vaccination measured using automated chemiluminescent enzyme immunoassay. J Infect Chemother 2021; 28:273-278. [PMID: 34857462 PMCID: PMC8627865 DOI: 10.1016/j.jiac.2021.11.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/04/2021] [Accepted: 11/23/2021] [Indexed: 12/20/2022]
Abstract
Background Levels of 50% neutralizing titer (NT50) reflect the a vaccine-induced humoral immunity after the vaccination against the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). Measurements of NT50 are difficult to implement in large quantities. A high-throughput laboratory test is expected for determining the level of herd immunity against SARS-CoV-2. Methods We analyzed samples from 168 Japanese healthcare workers who had completed two doses of the BNT162b2 vaccine. We analyzed immunoglobulin G (IgG) index values against spike protein (SP) using automated chemiluminescent enzyme immunoassay system AIA-CL and analyzed the background factors affecting antibody titer. SP IgG index was compared with 50% neutralization titers. Results The median SP IgG index values of the subjects (mean age = 43 years; 75% female) were 0.1, 1.35, 60.80, and 97.35 before and at 2, 4, and 6 weeks after the first dose, respectively. At 4 and 6 weeks after the first dose, SP IgG titers were found to have positive correlation with NT50 titer (r = 0.7535 in 4 weeks; r = 0.4376 in 6 weeks). Proportions of the SP IgG index values against the Alpha, Beta, Gamma, and Delta variants compared with the original strain were 2.029, 0.544, 1.017, and 0.6096 respectively. Older age was associated with lower SP IgG titer index 6 weeks after the first dose. Conclusions SP IgG index values were rised at 3 weeks after two doses of BNT162b2 vaccination and have positive correlation with NT50. SP IgG index values were lower in the older individuals and against Beta and Delta strain.
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Affiliation(s)
- Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Yokohama, Japan; Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Norihisa Ohtake
- Bioscience Division, Research and Development Department, Tosoh Corporation, Tokyo Research Center, Kanagawa, Japan; Advanced Medical Research Center, Yokohama City University, Yokohama, Japan
| | - Hirofumi Go
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan; Life Science Laboratory, Technology and Development Division, Kanto Chemical Co, Inc., Isehara, Japan
| | - Satoshi Yajima
- Clinical Laboratory Department, Yokohama City University Hospital, Yokohama, Japan
| | - Tomoko Shimada
- Nursing Department, Yokohama City University Hospital, Yokohama, Japan
| | - Atsushi Goto
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Hideaki Nakajima
- Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan.
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12
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Miyakawa K, Stanleyraj JS, Kato H, Yamaoka Y, Go H, Yajima S, Shimada T, Mihara T, Goto A, Yamanaka T, Ryo A. Rapid detection of neutralizing antibodies to SARS-CoV-2 variants in post-vaccination sera. J Mol Cell Biol 2021; 13:918-920. [PMID: 34450642 PMCID: PMC8800509 DOI: 10.1093/jmcb/mjab050] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | | | - Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Yokohama, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan.,Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Japan
| | - Hirofumi Go
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Satoshi Yajima
- Clinical Laboratory Department, Yokohama City University Hospital, Yokohama, Japan
| | - Tomoko Shimada
- Nursing Department, Yokohama City University Hospital, Yokohama, Japan
| | - Takahiro Mihara
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Atsushi Goto
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Takeharu Yamanaka
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
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13
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Morita T, Miyakawa K, Jeremiah SS, Yamaoka Y, Sada M, Kuniyoshi T, Yang J, Kimura H, Ryo A. All-Trans Retinoic Acid Exhibits Antiviral Effect against SARS-CoV-2 by Inhibiting 3CLpro Activity. Viruses 2021; 13:1669. [PMID: 34452533 PMCID: PMC8402917 DOI: 10.3390/v13081669] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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: 08/10/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 12/24/2022] Open
Abstract
The pandemic of COVID-19 caused by SARS-CoV-2 continues to spread despite the global efforts taken to control it. The 3C-like protease (3CLpro), the major protease of SARS-CoV-2, is one of the most interesting targets for antiviral drug development because it is highly conserved among SARS-CoVs and plays an important role in viral replication. Herein, we developed high throughput screening for SARS-CoV-2 3CLpro inhibitor based on AlphaScreen. We screened 91 natural product compounds and found that all-trans retinoic acid (ATRA), an FDA-approved drug, inhibited 3CLpro activity. The 3CLpro inhibitory effect of ATRA was confirmed in vitro by both immunoblotting and AlphaScreen with a 50% inhibition concentration (IC50) of 24.7 ± 1.65 µM. ATRA inhibited the replication of SARS-CoV-2 in VeroE6/TMPRSS2 and Calu-3 cells, with IC50 = 2.69 ± 0.09 µM in the former and 0.82 ± 0.01 µM in the latter. Further, we showed the anti-SARS-CoV-2 effect of ATRA on the currently circulating variants of concern (VOC); alpha, beta, gamma, and delta. These results suggest that ATRA may be considered as a potential therapeutic agent against SARS-CoV-2.
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Affiliation(s)
- Takeshi Morita
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan; (T.M.); (K.M.); (S.S.J.); (Y.Y.)
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan; (T.M.); (K.M.); (S.S.J.); (Y.Y.)
| | - Sundararaj Stanleyraj Jeremiah
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan; (T.M.); (K.M.); (S.S.J.); (Y.Y.)
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan; (T.M.); (K.M.); (S.S.J.); (Y.Y.)
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara 259-1146, Japan
| | - Mitsuru Sada
- Advanced Medical Science Research Center, Gunma Paz University, Shibukawa 377-0008, Japan;
| | - Tomoko Kuniyoshi
- R&D Department, TOKIWA Phytochemical Co., Ltd., Sakura, Chiba 285-0801, Japan; (T.K.); (J.Y.)
| | - Jinwei Yang
- R&D Department, TOKIWA Phytochemical Co., Ltd., Sakura, Chiba 285-0801, Japan; (T.K.); (J.Y.)
| | - Hirokazu Kimura
- Department of Health Science, Gunma Paz University Graduate School, Takasaki 370-0006, Japan;
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan; (T.M.); (K.M.); (S.S.J.); (Y.Y.)
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14
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Saji R, Nishii M, Sakai K, Miyakawa K, Yamaoka Y, Ban T, Abe T, Ohyama Y, Nakajima K, Hiromi T, Matsumura R, Suzuki N, Taniguchi H, Otsuka T, Oi Y, Ogawa F, Uchiyama M, Takahashi K, Iwashita M, Kimura Y, Fujii S, Furuya R, Tamura T, Ryo A, Takeuchi I. Combining IL-6 and SARS-CoV-2 RNAaemia-based risk stratification for fatal outcomes of COVID-19. PLoS One 2021; 16:e0256022. [PMID: 34379684 PMCID: PMC8357172 DOI: 10.1371/journal.pone.0256022] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 07/29/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The coronavirus disease 2019 (COVID-19) pandemic rapidly increases the use of mechanical ventilation (MV). Such cases further require extracorporeal membrane oxygenation (ECMO) and have a high mortality. OBJECTIVE We aimed to identify prognostic biomarkers pathophysiologically reflecting future deterioration of COVID-19. METHODS Clinical, laboratory, and outcome data were collected from 102 patients with moderate to severe COVID-19. Interleukin (IL)-6 level and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA copy number in plasma were assessed with ELISA kit and quantitative PCR. RESULTS Twelve patients died or required ECMO owing to acute respiratory distress syndrome despite the use of MV. Among various variables, a ratio of oxygen saturation to fraction of inspired oxygen (SpO2/FiO2), IL-6, and SARS-CoV-2 RNA on admission before intubation were strongly predictive of fatal outcomes after the MV use. Moreover, among these variables, combining SpO2/FiO2, IL-6, and SARS-CoV-2 RNA showed the highest accuracy (area under the curve: 0.934). In patients with low SpO2/FiO2 (< 261), fatal event-rate after the MV use at the 30-day was significantly higher in patients with high IL-6 (> 49 pg/mL) and SARS-CoV-2 RNAaemia (> 1.5 copies/μL) compared to those with high IL-6 or RNAaemia or without high IL-6 and RNAaemia (88% vs. 22% or 8%, log-rank test P = 0.0097 or P < 0.0001, respectively). CONCLUSIONS Combining SpO2/FiO2 with high IL-6 and SARS-CoV-2 RNAaemia which reflect hyperinflammation and viral overload allows accurately and before intubation identifying COVID-19 patients at high risk for ECMO use or in-hospital death despite the use of MV.
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Affiliation(s)
- Ryo Saji
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Mototsugu Nishii
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kazuya Sakai
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Kanagawa, Japan
| | - Tatsuma Ban
- Department of Immunology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Takeru Abe
- Department of Advanced Critical Care and Emergency Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
| | - Yutaro Ohyama
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kento Nakajima
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Taro Hiromi
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Reo Matsumura
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Naoya Suzuki
- Department of Critical Care and Emergency Medicine, National Hospital Organization Yokohama Medical Center, Yokohama, Kanagawa, Japan
| | - Hayato Taniguchi
- Department of Advanced Critical Care and Emergency Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
| | - Tsuyoshi Otsuka
- Department of Critical Care and Emergency Medicine, National Hospital Organization Yokohama Medical Center, Yokohama, Kanagawa, Japan
| | - Yasufumi Oi
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Fumihiro Ogawa
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Munehito Uchiyama
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Kohei Takahashi
- Department of Advanced Critical Care and Emergency Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
| | - Masayuki Iwashita
- Department of Advanced Critical Care and Emergency Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
| | - Yayoi Kimura
- Department of Advanced Medical Research Center, Yokohama City University, School of Medicine, Yokohama, Kanagawa, Japan
| | - Satoshi Fujii
- Department of Molecular Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
| | - Ryosuke Furuya
- Department of Critical Care and Emergency Medicine, National Hospital Organization Yokohama Medical Center, Yokohama, Kanagawa, Japan
| | - Tomohiko Tamura
- Department of Immunology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
- Department of Advanced Medical Research Center, Yokohama City University, School of Medicine, Yokohama, Kanagawa, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
- Department of Advanced Medical Research Center, Yokohama City University, School of Medicine, Yokohama, Kanagawa, Japan
| | - Ichiro Takeuchi
- Department of Emergency Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan
- Department of Advanced Critical Care and Emergency Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
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15
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Funabashi R, Miyakawa K, Yamaoka Y, Yoshimura S, Yamane S, Jeremiah SS, Shimizu K, Ozawa H, Kawakami C, Usuku S, Tanaka N, Yamazaki E, Kimura H, Hasegawa H, Ryo A. Development of highly sensitive and rapid antigen detection assay for diagnosis of COVID-19 utilizing optical waveguide immunosensor. J Mol Cell Biol 2021; 13:763-766. [PMID: 34165565 PMCID: PMC8344664 DOI: 10.1093/jmcb/mjab037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 05/01/2021] [Accepted: 05/12/2021] [Indexed: 01/16/2023] Open
Affiliation(s)
- Rikako Funabashi
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan.,Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa, Japan
| | - Seiko Yoshimura
- Primary Care Testing Solution Development Department, Canon Medical Systems Corporation, Tochigi, Japan
| | - Satoshi Yamane
- Primary Care Testing Solution Development Department, Canon Medical Systems Corporation, Tochigi, Japan
| | | | - Kohei Shimizu
- Yokohama City Institute of Public Health, Kanagawa, Japan
| | - Hiroki Ozawa
- Yokohama City Institute of Public Health, Kanagawa, Japan
| | | | - Shuzo Usuku
- Yokohama City Institute of Public Health, Kanagawa, Japan
| | - Nobuko Tanaka
- Yokohama City Institute of Public Health, Kanagawa, Japan
| | - Etsuko Yamazaki
- Clinical Laboratory Department, Yokohama City University Hospital, Kanagawa, Japan
| | - Hirokazu Kimura
- Department of Health Science, Gunma Paz University Graduate School, Gunma, Japan
| | - Hideki Hasegawa
- Influenza Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Kanagawa, Japan
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16
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Yamaoka Y, Miyakawa K, Jeremiah SS, Funabashi R, Okudela K, Kikuchi S, Katada J, Wada A, Takei T, Nishi M, Shimizu K, Ozawa H, Usuku S, Kawakami C, Tanaka N, Morita T, Hayashi H, Mitsui H, Suzuki K, Aizawa D, Yoshimura Y, Miyazaki T, Yamazaki E, Suzuki T, Kimura H, Shimizu H, Okabe N, Hasegawa H, Ryo A. Highly specific monoclonal antibodies and epitope identification against SARS-CoV-2 nucleocapsid protein for antigen detection tests. Cell Rep Med 2021; 2:100311. [PMID: 34027498 PMCID: PMC8126173 DOI: 10.1016/j.xcrm.2021.100311] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 04/02/2021] [Accepted: 05/13/2021] [Indexed: 12/24/2022]
Abstract
The ongoing coronavirus disease 2019 (COVID-19) pandemic is a major global public health concern. Although rapid point-of-care testing for detecting viral antigen is important for management of the outbreak, the current antigen tests are less sensitive than nucleic acid testing. In our current study, we produce monoclonal antibodies (mAbs) that exclusively react with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and exhibit no cross-reactivity with other human coronaviruses, including SARS-CoV. Molecular modeling suggests that the mAbs bind to epitopes present on the exterior surface of the nucleocapsid, making them suitable for detecting SARS-CoV-2 in clinical samples. We further select the optimal pair of anti-SARS-CoV-2 nucleocapsid protein (NP) mAbs using ELISA and then use this mAb pair to develop immunochromatographic assay augmented with silver amplification technology. Our mAbs recognize the variants of concern (501Y.V1-V3) that are currently in circulation. Because of their high performance, the mAbs of this study can serve as good candidates for developing antigen detection kits for COVID-19.
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Affiliation(s)
- Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa 236-0004, Japan
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Kanagawa 259-1146, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | | | - Rikako Funabashi
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | - Koji Okudela
- Department of Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | - Sayaka Kikuchi
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Kanagawa 259-1146, Japan
| | - Junichi Katada
- Medical Systems Research & Development Center, FUJIFILM Corporation, Kaisei, Kanagawa 258-8538, Japan
| | - Atsuhiko Wada
- Medical Systems Research & Development Center, FUJIFILM Corporation, Kaisei, Kanagawa 258-8538, Japan
| | - Toshiki Takei
- Medical Systems Research & Development Center, FUJIFILM Corporation, Kaisei, Kanagawa 258-8538, Japan
| | - Mayuko Nishi
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | - Kohei Shimizu
- Yokohama City Institute of Public Health, Yokohama, Kanagawa 236-0051, Japan
| | - Hiroki Ozawa
- Yokohama City Institute of Public Health, Yokohama, Kanagawa 236-0051, Japan
| | - Shuzo Usuku
- Yokohama City Institute of Public Health, Yokohama, Kanagawa 236-0051, Japan
| | - Chiharu Kawakami
- Yokohama City Institute of Public Health, Yokohama, Kanagawa 236-0051, Japan
| | - Nobuko Tanaka
- Yokohama City Institute of Public Health, Yokohama, Kanagawa 236-0051, Japan
| | - Takeshi Morita
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | - Hiroyuki Hayashi
- Division of Pathology, Yokohama Municipal Citizen’s Hospital, Yokohama, Kanagawa 221-0855, Japan
| | - Hideaki Mitsui
- Department of Pathology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | - Keita Suzuki
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Kanagawa 259-1146, Japan
| | - Daisuke Aizawa
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Kanagawa 259-1146, Japan
| | - Yukihiro Yoshimura
- Division of Infectious Disease, Yokohama Municipal Citizen’s Hospital, Yokohama, Kanagawa 221-0855, Japan
| | - Tomoyuki Miyazaki
- Department of Physiology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa 236-0004, Japan
| | - Etsuko Yamazaki
- Clinical Laboratory Department, Yokohama City University Hospital, Yokohama, Kanagawa 236-0004, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Shinjuku, Tokyo 162-8640, Japan
| | - Hirokazu Kimura
- School of Medical Technology, Faculty of Health Sciences, Gunma Paz University, Takasaki, Gunma 370-0006, Japan
| | - Hideaki Shimizu
- Division of Virology, Kawasaki City Institute for Public Health, Kawasaki, Kanagawa 210-0821, Japan
| | - Nobuhiko Okabe
- Division of Virology, Kawasaki City Institute for Public Health, Kawasaki, Kanagawa 210-0821, Japan
| | - Hideki Hasegawa
- Center for Influenza and Respiratory Virus Research, National Institute of Infectious Diseases, Musashimurayama, Tokyo 208-0011, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa 236-0004, Japan
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17
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Goto A, Go H, Miyakawa K, Yamaoka Y, Ohtake N, Kubo S, Jeremiah SS, Mihara T, Senuki K, Miyazaki T, Ikeda S, Ogura T, Kato H, Matsuba I, Sanno N, Miyakawa M, Ozaki H, Kikuoka M, Ohashi Y, Ryo A, Yamanaka T. Sustained Neutralizing Antibodies 6 Months Following Infection in 376 Japanese COVID-19 Survivors. Front Microbiol 2021; 12:661187. [PMID: 34025615 PMCID: PMC8137897 DOI: 10.3389/fmicb.2021.661187] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 04/09/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: There is scarce evidence regarding the long-term persistence of neutralizing antibodies among coronavirus disease 2019 (COVID-19) survivors. This study determined neutralizing antibody titers (NT50) and antibodies against spike protein (SP) or nucleocapsid protein (NP) antigens approximately 6 months after the diagnosis of COVID-19. Methods: COVID-19 survivors in Japan were recruited. Serum samples and data related to patients' characteristics and COVID-19 history were collected. NT50 and titers of antibodies against NP and SP antigens were measured at 20-32 weeks after the first positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) test results. Factors associated with NT50 were identified using the multivariable linear regression and the correlations among NT50 and titers of immunoglobulin G (IgG) and total immunoglobulins (Igs) against NP and SP were assessed by Spearman's correlation. Results: Among 376 participants (median [range] days after testing positive for SARS-CoV-2, 180 (147-224); median [range] years of age, 50 (20-78); 188 [50%] male), most tested positive for NT50 (n = 367, 98%), SP-IgG (n = 344, 91%), SP-total Ig (n = 369, 98%), NP-IgG (n = 314, 84%), and NP-total Ig (n = 365, 97%). Regression analysis indicated that higher BMI, fever, and the requirement of mechanical ventilation or extracorporeal membrane oxygenation were significantly associated with higher NT50. Anti-SP antibodies correlated moderately with NT50 (Spearman's correlation: 0.63 for SP IgG; 0.57 for SP-total Ig), while the correlation was weak for anti-NP antibodies (0.37 for NP IgG; 0.32 for NP-total Ig). Conclusions: Most COVID-19 survivors had sustained neutralizing antibodies and tested positive for SP-total Ig and NP-total Ig approximately 6 months after infection.
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Affiliation(s)
- Atsushi Goto
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Hirofumi Go
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- Life Science Laboratory, Technology and Development Division, Kanto Chemical Co, Inc., Kanagawa, Japan
| | - Norihisa Ohtake
- Bioscience Division, Research and Development Department, Tosoh Corporation, Tokyo Research Center, Kanagawa, Japan
- Advanced Medical Research Center, Yokohama City University, Yokohama, Japan
| | - Sousuke Kubo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | | | - Takahiro Mihara
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Kotaro Senuki
- YCU Center for Novel and Exploratory Clinical Trials, Yokohama City University Hospital, Yokohama, Japan
| | - Tomoyuki Miyazaki
- Department of Physiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Satoshi Ikeda
- Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
| | - Takashi Ogura
- Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
| | - Hideaki Kato
- Infection Prevention and Control Department, Yokohama City University Hospital, Yokohama, Japan
| | | | | | | | | | | | - Yasuo Ohashi
- Department of Integrated Science and Engineering for Sustainable Society, Chuo University, Tokyo, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Takeharu Yamanaka
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
- Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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18
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Yamaoka Y, Jeremiah SS, Miyakawa K, Saji R, Nishii M, Takeuchi I, Ryo A. Whole Nucleocapsid Protein of Severe Acute Respiratory Syndrome Coronavirus 2 May Cause False-Positive Results in Serological Assays. Clin Infect Dis 2021; 72:1291-1292. [PMID: 32445559 PMCID: PMC7314131 DOI: 10.1093/cid/ciaa637] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan.,Life Science Laboratory, Technology and Development Division, Kanto Chemical Co, Inc, Kanagawa, Japan
| | - Sundararaj S Jeremiah
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan
| | - Ryo Saji
- Department of Emergency Medicine, Yokohama City University Hospital, Kanagawa, Japan
| | - Mototsugu Nishii
- Department of Emergency Medicine, Yokohama City University Hospital, Kanagawa, Japan
| | - Ichiro Takeuchi
- Department of Emergency Medicine, Yokohama City University Hospital, Kanagawa, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, Japan
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19
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Miyakawa K, Jeremiah SS, Ohtake N, Matsunaga S, Yamaoka Y, Nishi M, Morita T, Saji R, Nishii M, Kimura H, Hasegawa H, Takeuchi I, Ryo A. Rapid quantitative screening assay for SARS-CoV-2 neutralizing antibodies using HiBiT-tagged virus-like particles. J Mol Cell Biol 2021; 12:987-990. [PMID: 32931563 PMCID: PMC7543420 DOI: 10.1093/jmcb/mjaa047] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | | | - Norihisa Ohtake
- Advanced Medical Research Center, Yokohama City University, Kanagawa 236-0004, Japan.,Bioscience Division, Reagent Development Department, Tosoh Corporation, Kanagawa 252-1123, Japan
| | - Satoko Matsunaga
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan.,Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa 259-1146, Japan
| | - Mayuko Nishi
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Takeshi Morita
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Ryo Saji
- Department of Emergency Medicine, Yokohama City University Hospital, Kanagawa 236-0004, Japan
| | - Mototsugu Nishii
- Department of Emergency Medicine, Yokohama City University Hospital, Kanagawa 236-0004, Japan
| | - Hirokazu Kimura
- School of Medical Technology, Faculty of Health Sciences, Gunma Paz University, Gunma 370-0006, Japan
| | - Hideki Hasegawa
- Influenza Research Center, National Institute of Infectious Diseases, Tokyo 208-0011, Japan
| | - Ichiro Takeuchi
- Department of Emergency Medicine, Yokohama City University Hospital, Kanagawa 236-0004, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan.,Advanced Medical Research Center, Yokohama City University, Kanagawa 236-0004, Japan
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20
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Kubo S, Ohtake N, Miyakawa K, Jeremiah SS, Yamaoka Y, Murohashi K, Hagiwara E, Mihara T, Goto A, Yamazaki E, Ogura T, Kaneko T, Yamanaka T, Ryo A. Development of an Automated Chemiluminescence Assay System for Quantitative Measurement of Multiple Anti-SARS-CoV-2 Antibodies. Front Microbiol 2021; 11:628281. [PMID: 33519790 PMCID: PMC7843449 DOI: 10.3389/fmicb.2020.628281] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 11/11/2020] [Accepted: 12/17/2020] [Indexed: 01/19/2023] Open
Abstract
Objectives Serological tests for COVID-19 have been instrumental in studying the epidemiology of the disease. However, the performance of the currently available tests is plagued by the problem of variability. We have developed a high-throughput serological test capable of simultaneously detecting total immunoglobulins (Ig) and immunoglobulin G (IgG) against nucleocapsid protein (NP) and spike protein (SP) and report its performance in detecting COVID-19 in clinical samples. Methods We designed and prepared reagents for measuring NP-IgG, NP-Total Ig, SP-IgG, and SP-Total Ig (using N-terminally truncated NP (ΔN-NP) or receptor-binding domain (RBD) antigen) dedicated automated chemiluminescent enzyme immunoassay analyzer AIA-CL1200. After determining the basal thresholds based on 17 sera obtained from confirmed COVID-19 patients and 600 negative sera, the clinical validity of the assay was evaluated using independent 202 positive samples and 1,000 negative samples from healthy donors. Results All of the four test parameters showed 100% specificity individually (1,000/1,000; 95%CI, 99.63–100). The sensitivity of the assay increased proportionally to the elapsed time from symptoms onset, and all the tests achieved 100% sensitivity (153/153; 95%CI, 97.63–100) after 13 days from symptoms onset. NP-Total Ig was the earliest to attain maximal sensitivity among the other antibodies tested. Conclusion Our newly developed serological testing exhibited 100% sensitivity and specificity after 13 days from symptoms onset. Hence, it could be used as a reliable method for accurate detection of COVID-19 patients and to evaluate seroprevalence and possibly for surrogate assessment of herd immunity.
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Affiliation(s)
- Sousuke Kubo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Norihisa Ohtake
- Bioscience Division, Reagent Development Department, Tosoh Corporation, Kanagawa, Japan.,Advanced Medical Research Center, Yokohama City University, Yokohama, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | | | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa, Japan
| | - Kota Murohashi
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
| | - Eri Hagiwara
- Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
| | - Takahiro Mihara
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Atsushi Goto
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan
| | - Etsuko Yamazaki
- Clinical Laboratory Department, Yokohama City University Hospital, Yokohama, Japan
| | - Takashi Ogura
- Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
| | - Takeshi Kaneko
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Takeharu Yamanaka
- Department of Health Data Science, Yokohama City University Graduate School of Data Science, Yokohama, Japan.,Department of Biostatistics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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21
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Jeremiah SS, Miyakawa K, Morita T, Yamaoka Y, Ryo A. Potent antiviral effect of silver nanoparticles on SARS-CoV-2. Biochem Biophys Res Commun 2020; 533:195-200. [PMID: 32958250 PMCID: PMC7486059 DOI: 10.1016/j.bbrc.2020.09.018] [Citation(s) in RCA: 200] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 12/02/2022]
Abstract
The pandemic of COVID-19 is spreading unchecked due to the lack of effective antiviral measures. Silver nanoparticles (AgNP) have been studied to possess antiviral properties and are presumed to inhibit SARS-CoV-2. Due to the need for an effective agent against SARS-CoV-2, we evaluated the antiviral effect of AgNPs. We evaluated a plethora of AgNPs of different sizes and concentration and observed that particles of diameter around 10 nm were effective in inhibiting extracellular SARS-CoV-2 at concentrations ranging between 1 and 10 ppm while cytotoxic effect was observed at concentrations of 20 ppm and above. Luciferase-based pseudovirus entry assay revealed that AgNPs potently inhibited viral entry step via disrupting viral integrity. These results indicate that AgNPs are highly potent microbicides against SARS-CoV-2 but should be used with caution due to their cytotoxic effects and their potential to derange environmental ecosystems when improperly disposed.
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Affiliation(s)
- Sundararaj S Jeremiah
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Takeshi Morita
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan; Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa, 259-1146, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan.
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22
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Yamaoka Y, Matsunaga S, Jeremiah SS, Nishi M, Miyakawa K, Morita T, Khatun H, Shimizu H, Okabe N, Kimura H, Hasegawa H, Ryo A. Zika virus protease induces caspase-independent pyroptotic cell death by directly cleaving gasdermin D. Biochem Biophys Res Commun 2020; 534:666-671. [PMID: 33208231 DOI: 10.1016/j.bbrc.2020.11.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 11/07/2020] [Indexed: 12/27/2022]
Abstract
The association of Zika virus (ZIKV) infection with a congenital malformation in fetuses, neurological, and other systemic complications in adults have brought significant global health emergency. ZIKV targets nerve cells in the brain and causes cell death, such as pyroptosis, leading to neuroinflammation. Here we described a novel mechanism of pyroptosis caused by ZIKV protease. We found that ZIKV protease directly cleaved the GSDMD into N-terminal fragment (1-249) leading to pyroptosis in a caspase-independent manner, suggesting a direct mechanism of ZIKV-induced cell death and subsequent inflammation. Our findings might shed new light to explore the pathogenesis of ZIKV infections where ZIKV protease might be a suitable target for the development of antiviral agents.
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Affiliation(s)
- Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan; Life Science Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa, 259-1146, Japan
| | - Satoko Matsunaga
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Sundararaj S Jeremiah
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Mayuko Nishi
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Takeshi Morita
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Hajera Khatun
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan
| | - Hideaki Shimizu
- Division of Virology, Kawasaki City Institute for Public Health, Kanagawa, 210-0821, Japan
| | - Nobuhiko Okabe
- Division of Virology, Kawasaki City Institute for Public Health, Kanagawa, 210-0821, Japan
| | - Hirokazu Kimura
- Department of Health Science, Gunma Paz University Graduate School, Gunma, 370-0006, Japan
| | - Hideki Hasegawa
- Influenza Research Center, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa, 236-0004, Japan.
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23
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Hiramatsu M, Sugiu K, Hishikawa T, Haruma J, Takahashi Y, Murai S, Nishi K, Yamaoka Y, Shimazu Y, Fujii K, Kameda M, Kurozumi K, Date I. Detailed Arterial Anatomy and Its Anastomoses of the Sphenoid Ridge and Olfactory Groove Meningiomas with Special Reference to the Recurrent Branches from the Ophthalmic Artery. AJNR Am J Neuroradiol 2020; 41:2082-2087. [PMID: 33004344 DOI: 10.3174/ajnr.a6790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 07/15/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Detailed arterial anatomy of the sphenoid ridge and olfactory groove meningiomas is complicated due to the fine angioarchitecture and anastomoses between each feeder. Herein, we present details of the arterial anatomy and the relationships of feeders in these lesions. MATERIALS AND METHODS This study included 20 patients admitted to our department between April 2015 and March 2020. Conditions of subjects consisted of 16 sphenoid ridge meningiomas and 4 olfactory groove meningiomas. We mainly analyzed arterial anatomy using 3D rotational angiography and slab MIP images of these lesions. We also analyzed the anastomoses of each feeder. RESULTS We found that 19 (95%), 15 (75%), and 15 (75%) lesions had feeders from the ophthalmic, internal carotid, and external carotid arteries, respectively. As feeders from the ophthalmic artery, recurrent meningeal arteries were involved in 18 lesions (90%). Fifteen lesions (75%) had anastomoses between each feeder. CONCLUSIONS Most of the meningiomas in the sphenoid ridge and olfactory groove had feeders from the ophthalmic and internal carotid arteries. There were various anastomoses between each feeder. This is the first report to demonstrate the detailed arterial anatomy and frequency of recurrent branches from the ophthalmic artery and their anastomoses using detailed imaging techniques.
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Affiliation(s)
- M Hiramatsu
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - K Sugiu
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - T Hishikawa
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - J Haruma
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Y Takahashi
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - S Murai
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - K Nishi
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Y Yamaoka
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Y Shimazu
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - K Fujii
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - M Kameda
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - K Kurozumi
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
- Department of Neurosurgery (K.K.), Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - I Date
- From the Department of Neurological Surgery (M.H., K.S., T.H., J.H., Y.T., S.M., K.N., Y.Y., Y.S., K.F., M.K., K.K., I.D.), Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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24
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Yamaoka Y, Shiomi A, Kagawa H, Hino H, Manabe S, Kato S, Hanaoka M. Which is more important in the management of splenic flexure colon cancer: strict central lymph node dissection or adequate bowel resection margin? Tech Coloproctol 2020; 24:873-882. [PMID: 32548666 DOI: 10.1007/s10151-020-02260-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 06/10/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND What qualifies as optimal lymph node (LN) dissection in the surgical management of splenic flexure colon cancer (SFCC) still remains controversial because few studies have evaluated the distribution of LN metastasis of SFCC. The aim of this study was to clarify detailed distribution of LN metastasis and long-term outcomes of SFCC. METHODS This retrospective study enrolled patients who had curative colectomy for primary transverse or descending colon cancer of pathological stage I, II, or III at a single high-volume cancer center between April 2002 and December 2018. The 538 eligible patients were divided into three groups: patients with SFCC (SFCC group, n = 168), patients with proximal transverse colon cancer (PTCC group, n = 290), and patients with distal descending colon cancer (DDCC group, n = 80). LNs were classified into horizontal (pericolic) and vertical (intermediate and main) nodes. Intermediate and main LN station numbers were defined according to the Japanese Society for Cancer of the Colon and Rectum classification. Distributions of LN metastasis and long-term outcomes were compared. RESULTS In the SFCC group, the mean age was 67.3 ± 10.5 years and 110 patients (65.5%) were male. The proportion of patients with LN metastasis in the intermediate or main region was significantly lower in the SFCC group (8%) than in the PTCC (37%) (p < 0.01) or DDCC group (29%) (p < 0.01) in pathological stage III patients. In the SFCC group, the incidence of pericolic LN metastasis on the oral side of tumor (43%) was significantly higher than in the PTCC group (21%) (p < 0.01) and was similar to that in the DDCC group (42%) (p = 0.51), while in the SFCC group, the incidence of pericolic LN metastasis on the anal side of tumor (17%) was lower than in the PTCC group (31%) and was also similar to that in the DDCC group (21%). There were no significant differences in disease-specific survival rates among all groups. CONCLUSIONS LN metastasis occurred mainly in the pericolic region, especially on the oral side of the tumor in SFCC. It may, therefore, be important to have an adequate bowel resection margin, especially on the oral side, for SFCC.
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Affiliation(s)
- Y Yamaoka
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan.
| | - A Shiomi
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - H Kagawa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - H Hino
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - S Manabe
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - S Kato
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - M Hanaoka
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
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Nishi M, Miyakawa K, Matsunaga S, Khatun H, Yamaoka Y, Watashi K, Sugiyama M, Kimura H, Wakita T, Ryo A. Prolyl Isomerase Pin1 Regulates the Stability of Hepatitis B Virus Core Protein. Front Cell Dev Biol 2020; 8:26. [PMID: 32083080 PMCID: PMC7005485 DOI: 10.3389/fcell.2020.00026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/14/2020] [Indexed: 01/14/2023] Open
Abstract
The dynamic interplay between virus and host proteins is critical for establishing efficient viral replication and virus-induced pathogenesis. Phosphorylation-dependent prolyl isomerization by Pin1 provides a unique mechanism of molecular switching to control both protein function and stability. We demonstrate here that Pin1 binds and stabilizes hepatitis B virus core protein (HBc) in a phosphorylation-dependent manner, and promotes the efficient viral propagation. Phos-tag gel electrophoresis with various site-directed mutants of HBc revealed that Thr160 and Ser162 residues within the C terminal arginine-rich domain are phosphorylated concomitantly. GST pull-down assay and co-immunoprecipitation analysis demonstrated that Pin1 associated with phosphorylated HBc at the Thr160-Pro and Ser162-Pro motifs. Chemical or genetic inhibition of Pin1 significantly accelerated the rapid degradation of HBc via a lysosome-dependent pathway. Furthermore, we found that the pyruvate dehydrogenase phosphatase catalytic subunit 2 (PDP2) could dephosphorylate HBc at the Pin1-binding sites, thereby suppressing Pin1-mediated HBc stabilization. Our findings reveal an important regulatory mechanism of HBc stability catalyzed by Pin1 and may facilitate the development of new antiviral therapeutics targeting Pin1 function.
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Affiliation(s)
- Mayuko Nishi
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Satoko Matsunaga
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Hajera Khatun
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan.,Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Japan
| | - Koichi Watashi
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Masaya Sugiyama
- Genome Medical Sciences Project, National Center for Global Health and Medicine, Chiba, Japan
| | - Hirokazu Kimura
- Faculty of Health Sciences, School of Medical Technology, Gunma Paz University, Takasaki, Japan
| | - Takaji Wakita
- Genome Medical Sciences Project, National Center for Global Health and Medicine, Chiba, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Japan
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26
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Hoy CFO, Kushiro K, Yamaoka Y, Ryo A, Takai M. Rapid multiplex microfiber-based immunoassay for anti-MERS-CoV antibody detection. Sens Biosensing Res 2019; 26:100304. [PMID: 32289017 PMCID: PMC7104066 DOI: 10.1016/j.sbsr.2019.100304] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/02/2019] [Accepted: 10/03/2019] [Indexed: 11/26/2022] Open
Abstract
On-site multiplex biosensors for innate immunity antibodies are ideal tools for monitoring health status of individuals against various diseases. This study introduces a novel antibody immunoassay testing platform incorporating microfiber-based arrays of antigens to capture specific antibodies. The fabrication and setup of the device revolved around electrospun polystyrene (ESPS) microfibers that act as three-dimensional membrane filters, capable of rapid and multifold analyte capture. In particular, the ESPS microfibers were patterned through localized oxygen plasma to create hydrophilic zones that facilitate fluid flows and immobilizations of antigens. The bulk of this robust antibody immunoassay platform could be installed into a compact syringe-driven cassette device, which could perform multiplex antibody immunoassay for antibodies specifically against Middle East respiratory syndrome coronavirus (MERS-CoV) with rapid preparation amounting to a total of 5 min, as well as high sensitivity and specificity for the MERS-CoV down to 200 μg/mL.
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Affiliation(s)
- Carlton F O Hoy
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Keiichiro Kushiro
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Japan.,Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Isehara, Japan
| | - Akihide Ryo
- Department of Microbiology, School of Medicine, Yokohama City University, Yokohama, Japan
| | - Madoka Takai
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan
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27
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Khatun H, Yamaoka Y, Matsushima Y, Matsunaga S, Kimura H, Ho J, Shuda M, Ryo A. Production and characterization of monoclonal antibodies specific for major capsid VP1 protein of trichodysplasia spinulosa-associated polyomavirus. Microbiol Immunol 2019; 62:763-773. [PMID: 30537287 DOI: 10.1111/1348-0421.12662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/21/2018] [Accepted: 11/29/2018] [Indexed: 11/26/2022]
Abstract
Trichodysplasia spinulosa-associated polyomavirus (TSPyV), a newly identified polyomavirus, has been implicated as a causative agent of trychodysplasia spinulosa (TS), a rare proliferative skin disease in severely immunocompromised hosts. Diagnosis using mAbs is a promising tool with high specificity towards the specific antigen. However, thus far, no suitable mAbs for diagnosing TS disease have been identified. In this study, mAbs specific for VP1 of TSPyV were developed and characterized. Wheat germ cell-free synthesized VP1 protein of TSPyV was used to immunize BALB/c mice to generate hybridomas. Screening of the resultant hybridoma clones resulted in selection of five strongly positive clones that produce mAbs that react with the TSPyV-VP1 antigen. Epitope mapping and bioinformatic analysis showed that these mAbs recognized epitopes located within highly conserved C-terminal region of all clinical isolates of TSPyV-VP1. Further, all these mAbs were highly effective for immunofluorescence and immunoprecipitation analysis. Three of the five mAbs exhibited no cross-reactivity with VP1 of other related polyomaviruses. In addition, one of our mAbs (#14) provided immunohistochemical staining of skin tissue of TS disease. It can be concluded that three of the mAbs in this panel of anti-VP1 antibodies may provide a useful set of tools for studying TSPyV infection and making the specific diagnosis.
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Affiliation(s)
- Hajera Khatun
- Department of Microbiology, Yokohama City University School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan.,Isehara Research Laboratory, Technology and Development Division, Kanto Chemical, Kanagawa 259-1146, Japan
| | - Yuki Matsushima
- Division of Virology, Kawasaki City Institute for Public Health, Kanagawa 210-0821, Japan
| | - Satoko Matsunaga
- Department of Microbiology, Yokohama City University School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
| | - Hirokazu Kimura
- School of Medical Technology, Faculty of Health Sciences, Gunma Paz University, Gunma 370-0006, Japan
| | - Jonhan Ho
- Department of Dermatology and Pathology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Masahiro Shuda
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, 15213, USA
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama-shi, Kanagawa 236-0004, Japan
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Miyakawa K, Matsunaga S, Yamaoka Y, Dairaku M, Fukano K, Kimura H, Chimuro T, Nishitsuji H, Watashi K, Shimotohno K, Wakita T, Ryo A. Development of a cell-based assay to identify hepatitis B virus entry inhibitors targeting the sodium taurocholate cotransporting polypeptide. Oncotarget 2018; 9:23681-23694. [PMID: 29805766 PMCID: PMC5955094 DOI: 10.18632/oncotarget.25348] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 04/24/2018] [Indexed: 12/18/2022] Open
Abstract
Sodium taurocholate cotransporting polypeptide (NTCP) is a major entry receptor of hepatitis B virus (HBV) and one of the most attractive targets for anti-HBV drugs. We developed a cell-mediated drug screening method to monitor NTCP expression on the cell surface by generating a HepG2 cell line with tetracycline-inducible expression of NTCP and a monoclonal antibody that specifically detects cell-surface NTCP. Using this system, we screened a small molecule library for compounds that protected against HBV infection by targeting NTCP. We found that glabridin, a licorice-derived isoflavane, could suppress viral infection by inducing caveolar endocytosis of cell-surface NTCP with an IC50 of ~40 μM. We also found that glabridin could attenuate the inhibitory effect of taurocholate on type I interferon signaling by depleting the level of cell-surface NTCP. These results demonstrate that our screening system could be a powerful tool for discovering drugs targeting HBV entry.
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Affiliation(s)
- Kei Miyakawa
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Satoko Matsunaga
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Yutaro Yamaoka
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan.,Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa 259-1146, Japan
| | - Mina Dairaku
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
| | - Kento Fukano
- Department of Virology II, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Hirokazu Kimura
- School of Medical Technology, Faculty of Health Sciences, Gunma Paz University, Gunma 370-0006, Japan
| | - Tomoyuki Chimuro
- Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc., Kanagawa 259-1146, Japan
| | - Hironori Nishitsuji
- Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba 272-8516, Japan
| | - Koichi Watashi
- Department of Virology II, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Kunitada Shimotohno
- Research Center for Hepatitis and Immunology, National Center for Global Health and Medicine, Chiba 272-8516, Japan
| | - Takaji Wakita
- Department of Virology II, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Akihide Ryo
- Department of Microbiology, Yokohama City University School of Medicine, Kanagawa 236-0004, Japan
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29
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Hino H, Yamaguchi T, Kinugasa Y, Shiomi A, Kagawa H, Yamakawa Y, Numata M, Furutani A, Yamaoka Y, Manabe S, Suzuki T, Kato S. Robotic-assisted multivisceral resection for rectal cancer: short-term outcomes at a single center. Tech Coloproctol 2017; 21:879-886. [PMID: 29134385 DOI: 10.1007/s10151-017-1710-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/22/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND The safety and feasibility of robotic-assisted multivisceral resection for locally advanced rectal cancer remain unclear. The aim of this study was to assess the short-term outcomes of this procedure at our institution. METHODS From December 2011 to December 2016, patients who underwent robotic-assisted multivisceral resection for rectal cancer were investigated. Patient demographics, treatment characteristics, perioperative outcomes, and pathological results were evaluated retrospectively. RESULTS There were 31 patients; 17 men (54.8%) and 14 women (45.2%), with a median age of 65 years (range 40-82 years). Twenty-one patients (67.7%) had a cT4 tumor, 9 patients (29.0%) had a pT4b tumor, and all patients except one (96.8%) underwent complete resection of the primary tumor with negative resection margins. Eleven patients (35.5%) received neoadjuvant chemoradiation. The most commonly resected organ was the vaginal wall (n = 12, 38.7%), followed by the prostate (n = 10, 32.3%). Lateral lymph node dissection was performed in 20 patients (64.5%). The median operative time was 394 min (range 189-549 min), and the median blood loss was 41 mL (range 0-502 mL). None of the patients received intraoperative blood transfusions or required conversion to open. Overall, postoperative complications occurred in 11 patients (35.5%). The most frequent complication was urinary retention (n = 5, 16.1%), and none of the patients developed serious complications classified as Clavien-Dindo grades III-V. CONCLUSIONS Robotic-assisted multivisceral resection for rectal cancer is safe and technically feasible.
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Affiliation(s)
- H Hino
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - T Yamaguchi
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan.
| | - Y Kinugasa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - A Shiomi
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - H Kagawa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - Y Yamakawa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - M Numata
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - A Furutani
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - Y Yamaoka
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - S Manabe
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - T Suzuki
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
| | - S Kato
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, 411-8777, Japan
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30
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Kashiwabara SI, Tsuruta S, Yamaoka Y, Oyama K, Iwazaki C, Baba T. PAPOLB/TPAP regulates spermiogenesis independently of chromatoid body-associated factors. J Reprod Dev 2017; 64:25-31. [PMID: 29109362 PMCID: PMC5830355 DOI: 10.1262/jrd.2017-106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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] [Indexed: 12/14/2022] Open
Abstract
Mutant mice lacking a testis-specific cytoplasmic poly(A) polymerase, PAPOLB/TPAP, exhibit spermiogenesis arrest and male infertility. However, the mechanism by which PAPOLB regulates spermiogenesis remains unclear. In
this study, we examined the relationships between PAPOLB and other spermiogenesis regulators present in the chromatoid body (CB). The loss of PAPOLB had no impact either on the abundance of CB components such as PIWIL1,
TDRD6, YBX2, and piRNAs, or on retrotransposon expression. In addition, localization of CB proteins and CB architecture were both normal in PAPOLB-null mice. No interactions were observed between PAPOLB and PIWIL1 or
YBX2. While PIWIL1 and YBX2 were associated with translationally inactive messenger ribonucleoproteins and translating polyribosomes, PAPOLB was present almost exclusively in the mRNA-free fractions of sucrose gradients.
These results suggest that PAPOLB may regulate spermiogenesis through a pathway distinct from that mediated by CB-associated factors.
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Affiliation(s)
- Shin-Ichi Kashiwabara
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan.,PhD Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Ibaraki 305-8572, Japan.,Life Science Center, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ibaraki 305-8577, Japan
| | - Satsuki Tsuruta
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan
| | - Yutaro Yamaoka
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan
| | - Kanako Oyama
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan.,PhD Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Ibaraki 305-8572, Japan
| | - Chieko Iwazaki
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan
| | - Tadashi Baba
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan.,PhD Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Ibaraki 305-8572, Japan.,Life Science Center, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ibaraki 305-8577, Japan
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31
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Kashiwabara SI, Tsuruta S, Okada K, Yamaoka Y, Baba T. Adenylation by testis-specific cytoplasmic poly(A) polymerase, PAPOLB/TPAP, is essential for spermatogenesis. J Reprod Dev 2016; 62:607-614. [PMID: 27647534 PMCID: PMC5177979 DOI: 10.1262/jrd.2016-116] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 01/06/2023] Open
Abstract
The testis-specific cytoplasmic poly(A) polymerase PAPOLB/TPAP is essential for spermatogenesis. Although this enzyme is responsible for poly(A) tail
extension of a subset of mRNAs in round spermatids, the stability and translational efficiency of these mRNAs are unaffected by the absence of PAPOLB. To
clarify the functional importance of this enzyme’s adenylation activity, we produced PAPOLB-null mice expressing a polyadenylation-defective PAPOLB mutant
(PAPOLBD114A), in which the catalytic Asp at residue 114 was mutated to Ala. Introducing PAPOLBD114A failed to rescue PAPOLB-null
phenotypes, such as reduced expression of haploid-specific mRNAs, spermiogenesis arrest, and male infertility. These results suggest that PAPOLB regulates
spermatogenesis through its adenylation activity.
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Affiliation(s)
- Shin-Ichi Kashiwabara
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-8572, Japan
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32
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Yamaoka Y, Matsuyama S, Fukushi S, Matsunaga S, Matsushima Y, Kuroyama H, Kimura H, Takeda M, Chimuro T, Ryo A. Development of Monoclonal Antibody and Diagnostic Test for Middle East Respiratory Syndrome Coronavirus Using Cell-Free Synthesized Nucleocapsid Antigen. Front Microbiol 2016; 7:509. [PMID: 27148198 PMCID: PMC4837155 DOI: 10.3389/fmicb.2016.00509] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 03/29/2016] [Indexed: 01/13/2023] Open
Abstract
Protein nativity is one of the most critical factors for the quality of antigens used as immunogens and the reactivities of the resultant antibodies. The preparation and purification of native viral antigens in conventional cell-based protein expression systems are often accompanied by technical hardships. These challenges are attributable mainly to protein aggregation and insolubility during expression and purification, as well as to very low expression levels associated with the toxicity of some viral proteins. Here, we describe a novel approach for the production of monoclonal antibodies (mAbs) against nucleocapsid protein (NP) of the Middle East respiratory syndrome coronavirus (MERS-CoV). Using a wheat germ cell-free protein synthesis system, we successfully prepared large amounts of MERS-CoV NP antigen in a state that was highly soluble and intact for immunization. Following mouse immunization and hybridoma generation, we selected seven hybridoma clones that produced mAbs with exclusive reactivity against MERS-CoV NP. Epitope mapping and subsequent bioinformatic analysis revealed that these mAbs recognized epitopes located within relatively highly conserved regions of the MERS-CoV amino-acid sequence. Consistently, the mAbs exhibited no obvious cross-reactivity with NPs derived from other related viruses, including SARS coronavirus. After determining the optimal combinations of these mAbs, we developed an enzyme-linked immunosorbent assay and a rapid immunochromatographic antigen detection test that can be reliably used for laboratory diagnosis of MERS-CoV. Thus, this study provides strong evidence that the wheat germ cell-free system is useful for the production of diagnostic mAbs against emerging pathogens.
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Affiliation(s)
- Yutaro Yamaoka
- Department of Microbiology, School of Medicine, Yokohama City UniversityYokohama, Japan; Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc.Isehara, Japan
| | - Shutoku Matsuyama
- Department of Virology III, National Institute of Infectious Diseases Musashimurayama, Japan
| | - Shuetsu Fukushi
- Department of Virology I, National Institute of Infectious Diseases Musashimurayama, Japan
| | - Satoko Matsunaga
- Department of Microbiology, School of Medicine, Yokohama City University Yokohama, Japan
| | - Yuki Matsushima
- Department of Microbiology, School of Medicine, Yokohama City UniversityYokohama, Japan; Division of Virology, Kawasaki City Institute for Public HealthKawasaki, Japan
| | - Hiroyuki Kuroyama
- Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc. Isehara, Japan
| | - Hirokazu Kimura
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases Musashimurayama, Japan
| | - Makoto Takeda
- Department of Virology III, National Institute of Infectious Diseases Musashimurayama, Japan
| | - Tomoyuki Chimuro
- Isehara Research Laboratory, Technology and Development Division, Kanto Chemical Co., Inc. Isehara, Japan
| | - Akihide Ryo
- Department of Microbiology, School of Medicine, Yokohama City University Yokohama, Japan
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33
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Koizumi N, Harada Y, Beika M, Minamikawa T, Yamaoka Y, Dai P, Murayama Y, Yanagisawa A, Otsuji E, Tanaka H, Takamatsu T. Highly sensitive fluorescence detection of metastatic lymph nodes of gastric cancer with photo-oxidation of protoporphyrin IX. Eur J Surg Oncol 2016; 42:1236-46. [PMID: 27055944 DOI: 10.1016/j.ejso.2016.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 12/25/2015] [Accepted: 03/04/2016] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND The establishment of a precise and rapid method to detect metastatic lymph nodes (LNs) is essential to perform less invasive surgery with reduced gastrectomy along with reduced lymph node dissection. We herein describe a novel imaging strategy to detect 5-aminolevulinic acid (5-ALA)-induced protoporphyrin IX (PpIX) fluorescence in excised LNs specifically with reduced effects of tissue autofluorescence based on photo-oxidation of PpIX. We applied the method in a clinical setting, and evaluated its feasibility. METHODS To reduce the unfavorable effect of autofluorescence, we focused on photo-oxidation of PpIX: Following light irradiation, PpIX changes into another substance, photo-protoporphyrin, via an oxidative process, which has a different spectral peak, at 675 nm, whereas PpIX has its spectral peak at 635 nm. Based on the unique spectral alteration, fluorescence spectral imaging before and after light irradiation and subsequent originally-developed image processing was performed. Following in vitro study, we applied this method to a total of 662 excised LNs obtained from 30 gastric cancer patients administered 5-ALA preoperatively. RESULTS Specific visualization of PpIX was achieved in in vitro study. The method allowed highly sensitive detection of metastatic LNs, with sensitivity of 91.9% and specificity of 90.8% in the in vivo clinical trial. Receiver operating characteristic analysis indicated high diagnostic accuracy, with the area under the curve of 0.926. CONCLUSIONS We established a highly sensitive and specific 5-ALA-induced fluorescence imaging method applicable in clinical settings. The novel method has a potential to become a useful tool for intraoperative rapid diagnosis of LN metastasis.
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Affiliation(s)
- N Koizumi
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan; Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Y Harada
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - M Beika
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan; Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - T Minamikawa
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Y Yamaoka
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - P Dai
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - Y Murayama
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - A Yanagisawa
- Department of Surgical Pathology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - E Otsuji
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - H Tanaka
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan
| | - T Takamatsu
- Department of Pathology and Cell Regulation, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan.
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Yamaoka Y, Ichikawa Y, Morita A. Evaluation of Rotational Vertebral Artery Occlusion Using Ultrasound Facilitates the Detection of Arterial Dissection in the Atlas Loop. J Neuroimaging 2014; 25:647-51. [DOI: 10.1111/jon.12174] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 06/01/2014] [Accepted: 07/13/2014] [Indexed: 11/30/2022] Open
Affiliation(s)
- Y. Yamaoka
- Stroke Center; NTT Medical Center Tokyo; Tokyo Japan
| | - Y. Ichikawa
- Stroke Center; NTT Medical Center Tokyo; Tokyo Japan
| | - A. Morita
- Department of Neurological Surgery; Nippon Medical School; Tokyo Japan
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Tanaka H, Adachi T, Yamaoka Y, Takahashi M, Takamatsu T. P485Formation of contraction bands of heart muscle cells by spatially high-regional ablation of beta-dystroglycan via multiphoton excitation-evoked CALI. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu091.160] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yamaoka Y, Ichikawa Y, Kimura T, Sameshima T, Ochiai C, Morita A. A Novel Method for Transcranial Doppler Microembolic Signal Monitoring at the Vertebrobasilar Junction in Vertebral Artery Dissection Patients. J Neuroimaging 2012; 24:191-4. [DOI: 10.1111/j.1552-6569.2012.00749.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 04/25/2012] [Accepted: 05/22/2012] [Indexed: 11/28/2022] Open
Affiliation(s)
- Y. Yamaoka
- Stroke Center; NTT Medical Center Tokyo; Japan
| | - Y. Ichikawa
- Stroke Center; NTT Medical Center Tokyo; Japan
| | - T. Kimura
- Department of Neurosurgery; NTT Medical Center Tokyo; Japan
| | - T. Sameshima
- Department of Neurosurgery; NTT Medical Center Tokyo; Japan
| | - C. Ochiai
- Department of Neurosurgery; NTT Medical Center Tokyo; Japan
| | - A. Morita
- Department of Neurosurgery; NTT Medical Center Tokyo; Japan
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Abstract
Helicobacter pylori strains from different geographic areas exhibit clear phylogeographical differentiation; therefore, the genotypes of H. pylori strains can serve as markers for the migration of human populations. Currently, the genotypes of two virulence factors of H. pylori, cagA and vacA, and multilocus sequence typing (MLST) are widely used markers for genomic diversity within H. pylori populations. There are two types of cagA: the East Asian type and the Western type. In addition, the right end of the cag pathogenicity island is divided into five subtypes and there are distinct mosaic structures at the signal region and the middle region of vacA. Using combinations of the cagA, cag right end junction, and vacA genotypes, five major groups (East Asia type, South/Central Asia type, Iberian/Africa type and Europe type) have been defined according to geographical associations. MLST has revealed seven modern population types and six ancestral population types of H. pylori, and is a useful tool for mapping human migration patterns. Serial studies of large numbers of H. pylori strains, including strains isolated from aboriginal populations, show that MLST analysis provides more detailed information on human migration than does the analysis of human genetics. H. pylori infection is rapidly declining as a result of improvements in personal hygiene and quality of life. The molecular epidemiology of H. pylori infection has much to tell us and should be studied before it disappears entirely.
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Affiliation(s)
- Y Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu-city, Oita, Japan.
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Sugimoto M, Yamaoka Y. The association of vacA genotype and Helicobacter pylori-related disease in Latin American and African populations. Clin Microbiol Infect 2009; 15:835-42. [PMID: 19392900 DOI: 10.1111/j.1469-0691.2009.02769.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In the populations of Western countries, particular genotypes of the vacuolating cytotoxin gene, vacA (vacA s, signal region variants; vacA m, middle region variants) of Helicobacter pylori are believed to be risk factors for the development of peptic ulcers and gastric cancer. However, it was unclear whether these vacA gene variants are associated with the development of gastrointestinal diseases in developing nations. The relationship between vacA genotypes and H. pylori-related disease development in Latin American and African populations was investigated using meta-analysis of 2612 patients from Latin America (2285 strains) and 520 patients from Africa (434 strains). The frequencies of vacA s and m genotypes differed between strains from Latin America (77.2% for s1 and 68.1% for m1) and Africa (83.9% for s1 and 56.7% for m1). Latin American strains with s1 and m1 genotypes increased the risk of gastric cancer (OR 4.17, 95% CI 2.49-6.98 for s1, and 3.59, 2.27-5.68 for m1) and peptic ulcers (e.g. 1.73, 1.37-2.20 for s1). African strains with the s1 or m1 genotypes also increased the risk of peptic ulcers (8.69, 1.16-64.75 for s1) and gastric cancer (10.18, 2.36-43.84 for m1). The cagA-positive genotype frequently coincided with s1 and m1 genotypes in both populations. Overall, the vacA s and m genotypes were related to gastric cancer and peptic ulcer development and might be useful markers of risk factors for gastrointestinal disease, especially in Latin America. Further studies will be required to evaluate the effects of vacA genotypes in African populations because of the small sample number currently available.
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Affiliation(s)
- M Sugimoto
- Department of Medicine-Gastroenterology, Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, TX, USA
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Naoi M, Maruyama W, Yi H, Akao Y, Yamaoka Y, Shamoto-Nagai M. Neuroprotection by propargylamines in Parkinson's disease: intracellular mechanism underlying the anti-apoptotic function and search for clinical markers. J Neural Transm Suppl 2007:121-131. [PMID: 17982885 DOI: 10.1007/978-3-211-73574-9_15] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In Parkinson's and other neurodegenerative diseases, a therapeutic strategy has been proposed to halt progressive cell death. Propargylamine derivatives, rasagiline and (-)deprenyl (selegiline), have been confirmed to protect neurons against cell death induced by various insults in cellular and animal models of neurodegenerative disorders. In this paper, the mechanism and the markers of the neuroprotection are reviewed. Propargylamines prevent the mitochondrial permeabilization, membrane potential decline, cytochrome c release, caspase activation and nuclear translocation of glyceraldehyde 3-phosphate dehydrogenase. At the same time, rasagiline induces anti-apoptotic pro-survival proteins, Bcl-2 and glial cell-line derived neurotrophic factor, which is mediated by activated ERK-NF-kappaB signal pathway. DNA array studies indicate that rasagiline increases the expression of the genes coding mitochondrial energy synthesis, inhibitors of apoptosis, transcription factors, kinases and ubiquitin-proteasome system, sequentially in a time-dependent way. Products of cell survival-related gene induced by propargylamines may be applied as markers of neuroprotection in clinical samples.
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Affiliation(s)
- M Naoi
- Gifu International Institute of Biotechnology, Kakamigahara, Gifu, Japan.
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Naoi M, Maruyama W, Akao Y, Yi H, Yamaoka Y. Involvement of type A monoamine oxidase in neurodegeneration: regulation of mitochondrial signaling leading to cell death or neuroprotection. J Neural Transm Suppl 2006:67-77. [PMID: 17447417 DOI: 10.1007/978-3-211-33328-0_8] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In neurodegenerative diseases, including Parkinson's and Alzheimer's diseases, apoptosis is a common type of cell death, and mitochondria emerge as the major organelle to initiate death cascade. Monoamine oxidase (MAO) in the mitochondrial outer membrane produces hydrogen peroxide by oxidation of monoamine substrates, and induces oxidative stress resulting in neuronal degeneration. On the other hand, a series of inhibitors of type B MAO (MAO-B) protect neurons from cell death. These results suggest that MAO may be involved in the cell death process initiated in mitochondria. However, the direct involvement of MAO in the apoptotic signaling has been scarcely reported. In this paper, we present our recent results on the role of MAO in activating and regulating cell death processing in mitochondria. Type A MAO (MAO-A) was found to bind an endogenous dopaminergic neurotoxin, N-methyl(R)salsolinol, and induce apoptosis in dopaminergic SH-SY5Y cells containing only MAO-A. To examine the intervention of MAO-B in apoptotic process, human MAO-B cDNA was transfected to SH-SY5Y cells, but the sensitivity to N-methyl(R)salsolinol was not affected, even though the activity and protein of MAO-B were expressed markedly. MAO-B oxidized dopamine with production of hydrogen peroxide, whereas in control cells expressing only MAO-A, dopamine autoxidation produced superoxide and dopamine-quinone, and induced mitochondrial permeability transition and apoptosis. Rasagiline and other MAO-B inhibitors prevent the activation of apoptotic cascade and induce prosurvival genes, such as bcl-2 and glial cell line-derived neurotrophic factor, in MAO-A-containing cells. These results demonstrate a novel function of MAO-A in the induction and regulation of apoptosis. Future studies will clarify more detailed mechanism behind regulation of mitochondrial death signaling by MAO-A, and bring out new strategies to cure or ameliorate the decline of neurons in neurodegenerative disorders.
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Affiliation(s)
- M Naoi
- Department of Neurosciences, Gifu International Institute of Biotechnology, Kakamigahara, Gifu, Japan.
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Abstract
BACKGROUND AND AIMS A number of Helicobacter pylori outer membrane proteins (OMPs) undergo phase variations. This study examined the relation between OMP phase variations and clinical outcome. METHODS Expression of H pylori BabA, BabB, SabA, and OipA proteins was determined by immunoblot. Multiple regression analysis was performed to determine the relation among OMP expression, clinical outcome, and mucosal histology. RESULTS H pylori were cultured from 200 patients (80 with gastritis, 80 with duodenal ulcer (DU), and 40 with gastric cancer). The most reliable results were obtained using cultures from single colonies of low passage number. Stability of expression with passage varied with OipA > BabA > BabB > SabA. OipA positive status was significantly associated with the presence of DU and gastric cancer, high H pylori density, and severe neutrophil infiltration. SabA positive status was associated with gastric cancer, intestinal metaplasia, and corpus atrophy, and negatively associated with DU and neutrophil infiltration. The Sydney system underestimated the prevalence of intestinal metaplasia/atrophy compared with systems using proximal and distal corpus biopsies. SabA expression dramatically decreased following exposure of H pylori to pH 5.0 for two hours. CONCLUSIONS SabA expression frequently switched on or off, suggesting that SabA expression can rapidly respond to changing conditions in the stomach or in different regions of the stomach. SabA positive status was inversely related to the ability of the stomach to secrete acid, suggesting that its expression may be regulated by changes in acid secretion and/or in antigens expressed by the atrophic mucosa.
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Affiliation(s)
- Y Yamaoka
- Department of Medicine, Michael E DeBakey Veterans Affairs Medical Center (111D), Houston, TX 77030, USA.
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Suetsugu H, Iimuro Y, Uehara T, Nishio T, Harada N, Yoshida M, Hatano E, Son G, Fujimoto J, Yamaoka Y. Nuclear factor {kappa}B inactivation in the rat liver ameliorates short term total warm ischaemia/reperfusion injury. Gut 2005; 54:835-42. [PMID: 15888794 PMCID: PMC1774544 DOI: 10.1136/gut.2004.043034] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND In hepatic ischaemia/reperfusion injury, activated liver macrophages (Kupffer cells) are dominantly regulated by a transcription factor, nuclear factor kappaB (NFkappaB), with respect to expression of inflammatory cytokines, acute phase response proteins, and cell adhesion molecules. AIMS We assessed whether inactivation of NFkappaB in the liver could attenuate total hepatic warm ischaemia/reperfusion injury. METHODS We studied rats with hepatic overexpression of inhibitor kappaBalpha super-repressor (IkappaBalpha SR) caused by a transgene introduced using an adenoviral vector. Hepatic ischaemia/reperfusion injury was induced under warm conditions by total occlusion of hepatoduodenal ligament structures for 20 minutes, followed by reperfusion. Controls included uninfected and control virus (AdLacZ) infected rats. RESULTS IkappaBalpha SR was overexpressed in Kupffer cells as well as in hepatocytes, blocking nuclear translocation of NFkappaB (p65) into the nucleus after reperfusion. Gene transfection with IkappaBalpha SR, but not with LacZ, markedly attenuated ischaemia/reperfusion injury, suppressing inducible nitric oxide synthase and nitrotyrosine expression in the liver. Moreover, no remarkable hepatocyte apoptosis was detected under IkappaBalpha SR overexpression. CONCLUSIONS Adenoviral transfer of the IkappaBalpha SR gene in the liver ameliorates short term warm ischaemia/reperfusion injury, possibly through attenuation of hepatic macrophage activation.
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Affiliation(s)
- H Suetsugu
- First Department of Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
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Saito H, Yamaoka Y, Ishizone S, Maruta F, Sugiyama A, Graham DY, Yamauchi K, Ota H, Miyagawa S. Roles of virD4 and cagG genes in the cag pathogenicity island of Helicobacter pylori using a Mongolian gerbil model. Gut 2005; 54:584-90. [PMID: 15831899 PMCID: PMC1774503 DOI: 10.1136/gut.2004.058982] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS The roles of the virD4 and the cagG genes in the cag pathogenicity island of Helicobacter pylori for gastroduodenal pathogenesis are unclear and their roles in vivo have not been examined. METHODS Seven week old male Mongolian gerbils were inoculated with the wild type H pylori TN2GF4, its isogenic virD4, or cagG mutants. Animals were sacrificed at 4, 12, and 24 weeks after inoculation. Gastric inflammation and H pylori density were evaluated by histology, inflammatory response (as measured by interleukin (IL)-1beta mRNA levels), proliferative activity (as assessed by 5'-bromo-2'deoxyuridine labelling indices), and host systemic reaction (as measured by anti-H pylori IgG antibody). RESULTS Degree of gastric inflammation, proliferative activity, and mucosal IL-1beta mRNA levels remained low throughout the first 12 weeks in gerbils infected with the virD4 mutants. Degree of gastric inflammation and proliferative activity increased at 24 weeks with the virD4 mutants reaching levels comparative with those seen at four weeks with the wild-type strains. Mucosal IL-1beta mRNA levels were also increased at 24 weeks with the virD4 mutants and levels at 24 weeks were similar between the wild-type and virD4 mutants. In contrast, gerbils infected with the cagG mutants had reduced ability to colonise gerbils, and no or little gastric inflammation or proliferative activity was observed. CONCLUSIONS Loss of the virD4 gene temporally retarded but did not abrogate gastric inflammation. Loss of the cagG gene abolished gastric inflammation partially via reduced ability to colonise gerbils. Unknown factors related to the type IV secretion system other than CagA may influence gastric inflammation.
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Affiliation(s)
- H Saito
- Department of Surgery, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
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Dang F, Shinohara S, Tabata O, Yamaoka Y, Kurokawa M, Shinohara Y, Ishikawa M, Baba Y. Replica multichannel polymer chips with a network of sacrificial channels sealed by adhesive printing method. Lab Chip 2005; 5:472-478. [PMID: 15791347 DOI: 10.1039/b417398h] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Replica microchips for capillary array electrophoresis containing 10 separation channels (50 microm width, 50 microm depth and 100 microm pitch) and a network of sacrificial channels (100 microm width and 50 microm depth) were successfully fabricated on a poly(methyl methacrylate) (PMMA) substrate by injection molding. The strategy involved development of moving mask deep X-ray lithography to fabricate an array of channels with inclined channel sidewalls. A slight inclination of channel sidewalls, which can not be fabricated by conventional deep X-ray lithography, is highly required to ensure the release of replicated polymer chips from a mold. Moreover, the sealing of molded PMMA multichannel chips with a PMMA cover film was achieved by a novel bonding technique involving adhesive printing and a network of sacrificial channels. An adhesive printing process enables us to precisely control the thickness of an adhesive layer, and a network of sacrificial channels makes it possible to remove air bubbles and an excess adhesive, which are crucial to achieving perfect sealing of replica PMMA chips with well-defined channel and injection structures. A CCD camera equipped with an image intensifier was used to simultaneously monitor electrophoretic separations in ten micro-channels with laser-induced fluorescence detection. High-speed and high-throughput separations of a 100 bp DNA ladder and phi X174 Hae III DNA restriction fragments have been demonstrated using a 10-channel PMMA chip. The current work establishes the feasibility of mass production of PMMA multichannel chips at a cost-effective basis.
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Affiliation(s)
- F Dang
- Single-Molecule Bioanalysis Laboratory, National Institute of Advanced Industrial Science and Technology, Hayashi-cho 2217-14, Takamatsu 761-0395, Japan.
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Abstract
BACKGROUND A reliable challenge model is needed to evaluate Helicobacter pylori vaccine candidates. METHODS A cag pathogenicity island negative, OipA positive, multiple antibiotic susceptible strain of H pylori obtained from an individual with mild gastritis (Baylor strain 100) was used to challenge volunteers. Volunteers received 40 mg of famotidine at bedtime and 10(4)-10(10) cfu of H pylori in beef broth the next morning. Infection was confirmed by (13)C urea breath test ((13)C-UBT), culture, and histology. Eradication therapy was given four or 12 weeks post challenge and eradication was confirmed by at least two separate UBTs, as well as culture and histology. RESULTS Twenty subjects (nine women and 11 men; aged 23-33 years) received a H pylori challenge. Eighteen (90%) became infected. Mild to moderate dyspeptic symptoms occurred, peaked between days 9 and 12, and resolved. Vomitus from one subject contained >10(3) viable/ml H pylori. By two weeks post challenge gastric histology showed typical chronic H pylori gastritis with intense acute and chronic inflammation. The density of H pylori (as assessed by cfu/biopsy) was similarly independent of the challenge dose. A minimal infectious dose was not found. Gastric mucosal interleukin 8 levels increased more than 20-fold by two weeks after the challenge. CONCLUSION Challenge reliably resulted in H pylori infection. Infection was associated with typical H pylori gastritis with intense polymorphonuclear cell infiltration and interleukin 8 induction in gastric mucosa, despite absence of the cag pathogenicity island. Experimental H pylori infection is one of the viable approaches to evaluate vaccine candidates.
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Affiliation(s)
- D Y Graham
- Veterans Affairs Medical Center, Rm 3A-320 (111D), 2002 Holcombe Boulevard, Houston, TX 77030, USA.
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Chen A, Li CN, Hsu PI, Lai KH, Tseng HH, Hsu PN, Lo GH, Lo CC, Lin CK, Hwang IR, Yamaoka Y, Chen HC. Risks of interleukin-1 genetic polymorphisms and Helicobacter pylori infection in the development of gastric cancer. Aliment Pharmacol Ther 2004; 20:203-11. [PMID: 15233701 DOI: 10.1111/j.1365-2036.2004.01826.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND The host genetic factors that determine the clinical outcomes of Helicobacter pylori-infected individuals remain unclear. AIM To elucidate the risks of host interleukin-1 (IL-1) genetic polymorphisms and H. pylori infection in the development of gastric cancer. METHODS In a case-control study of 164 controls and 142 patients with gastric cancer, the IL-1B-511 biallelic polymorphisms and the IL-1RN penta-allelic variable number of tandem repeats were genotyped. RESULTS The carriage of IL-1RN*2, male gender, old age and H. pylori infection independently increased the risk of gastric cancer, with odds ratios of 3.3 [95% confidence interval (CI), 1.4-7.7], 2.1 (95% CI, 1.2-3.8), 5.3 (95% CI, 3.1-9.0) and 2.2 (95% CI, 1.3-3.8), respectively. H. pylori-infected individuals who were carriers of IL-1RN*2 showed increased risks of both intestinal and diffuse types of gastric cancer, with odds ratios of 11.0 and 8.7, respectively. In addition, these individuals also had a higher score of intestinal metaplasia in the corpus than did uninfected non-carriers. CONCLUSIONS This study is the first to verify IL-1RN*2 as an independent factor governing the development of gastric cancer in Asian individuals. A combination of H. pylori testing and host genotyping may target the eradication of H. pylori to high-risk individuals.
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Affiliation(s)
- A Chen
- Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan
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Tanaka A, Shinohara H, Yamaoka Y. Receptor-mediated biphasic alteration of hepatocellular transport from hepatocyte to bile canaliculi as measured by near-infrared spectroscopy: a novel test with glucagon for biliary excretion. Eur Surg Res 2004; 35:464-9. [PMID: 14593229 DOI: 10.1159/000073384] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2003] [Accepted: 04/08/2003] [Indexed: 11/19/2022]
Abstract
As glucagon is known to cause a receptor-mediated increase in intracellular calcium and cyclic AMP, we have developed a novel method of evaluating the integrity of the signal transduction and transport system using glucagon-induced changes in indocyanine green (ICG) excretion. The kinetics of the hepatocellular concentration of ICG at 4-second intervals was analyzed by near-infrared spectroscopy in vivo on the liver surface. After intravenous injection of 0.5 mg/kg ICG to rabbits, absorbance of ICG increased and then decreased according to the two-compartment model: ICG(t) = -Aexp(-alphat) + Bexp(-betat), where alpha and beta (min(-1)) indicate the time constants of uptake and excretion, respectively. During the excretion phase, 40 microg/kg glucagon was infused as a bolus via the portal vein. A biphasic acceleration and retardation of ICG excretion from the baseline exponential decay was observed in the controls. In order to perturb the glucagon response, colchicine, ouabain, wortmannin and an ischemia-reperfusion insult were employed. Colchicine, ouabain and wortmannin abolished the biphasic acceleration and retardation of ICG excretion. Glucagon response was absent upon the ischemia-reperfusion insult. The observed biphasic response to glucagon clearly indicates that glucagon modulates bile canalicular contraction and peristalsis via the two glucagon receptors and these second messengers. The glucagon response requires the integrity of signal transduction, cytoskeleton structure, myosin function, and bile canalicular pump.
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Affiliation(s)
- A Tanaka
- Department of Surgery, Maizuru Municipal Hospital, Maizuru, Kyoto, Japan.
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Hashida H, Takabayashi A, Tokuhara T, Hattori N, Taki T, Hasegawa H, Satoh S, Kobayashi N, Yamaoka Y, Miyake M. Clinical significance of transmembrane 4 superfamily in colon cancer. Br J Cancer 2003; 89:158-67. [PMID: 12838318 PMCID: PMC2394202 DOI: 10.1038/sj.bjc.6601015] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Cell motility is an important cellular function closely related to the processes of tumour progression and metastasis. Several members of transmembrane 4 superfamily (TM4SF) have been reported to be associated with cell motility and metastatic potential of solid tumour. The aim of this study is to clarify the clinical significance of the member of TM4SF (MRP-1/CD9, KAI1/CD82 and CD151) in human colon cancer. We studied 146 colon cancer patients who underwent curative surgery and studied the expression of MRP-1/CD9, KAI1/CD82 and CD151 using reverse transcriptase - polymerase chain reaction and immunohistochemistry. We found that 64 patients (43.8%) had MRP-1/CD9-positive tumours and that the overall survival rate of patients with MRP-1/CD9-positive tumours was much higher than that of patients with MRP-1/CD9-negative tumours (89.8 vs 50.8%, P<0.001). In contrast, 63 patients (43.2%) had KAI1/CD82-positive tumours and the overall survival rate of patients with KAI1/CD82-positive tumours was also higher than that of patients with KAI1/CD82-negative tumours (84.8 vs 54.9%, P=0.002). On the other hand, positive CD151 expression had a bad effect on the overall survival rate of patients with colon cancer (61.2 vs 74.9%, P=0.022). In a multivariate analysis, MRP-1/CD9 status was a good indicator of the overall survival (P=0.007). We have shown that the reduction of MRP-1/CD9 and KAI1/CD82 expression, and the increasing CD151 expression are indicators for a poor prognosis in patients with colon cancer. This is a first report describing about the relation between CD151 and colon cancer.
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Affiliation(s)
- H Hashida
- Department V of Oncology and Department of Thoracic Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka 530-8480, Japan
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - A Takabayashi
- Department of Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka, 530-8480, Japan
| | - T Tokuhara
- Department V of Oncology and Department of Thoracic Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka 530-8480, Japan
| | - N Hattori
- Department V of Oncology and Department of Thoracic Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka 530-8480, Japan
| | - T Taki
- Department V of Oncology and Department of Thoracic Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka 530-8480, Japan
| | - H Hasegawa
- First Department of Internal Medicine, Ehime University School of Medicine, Oazashizukawa, Shigenobu-cho, Onsen-gun, Ehime 791-0295, Japan
| | - S Satoh
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - N Kobayashi
- First Department of Surgery, Ehime University School of Medicine, Oazashizukawa, Shigenobu-cho, Onsen-gun, Ehime 791-0295, Japan
| | - Y Yamaoka
- Department of Gastroenterological Surgery, Kyoto University Graduate School of Medicine, 54, Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - M Miyake
- Department V of Oncology and Department of Thoracic Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka 530-8480, Japan
- Department V of Oncology and Department of Thoracic Surgery, Kitano Hospital, Tazuke Kofukai Medical Research Institute, 2-4-20, Ohgimachi, Kita-ku, Osaka 530-8480, Japan. E-mail: .
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49
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Abstract
Class II major histocompatilibity complex (MHC)-expressing cells are usually distributed in dental pulp, and it was postulated that the colony-stimulating factor (CSF) derived from dental pulp fibroblasts contributes to the migration of class II MHC-expressing cells into pulp tissue. This study aimed to investigate the CSF production of human dental pulp fibroblasts. In pulp tissue sections, granulocyte (G)-CSF was detected from normal teeth, while G-CSF, macrophage (M)-CSF, and granulocyte-macrophage (GM)-CSF were detected from teeth with dentinal caries. In cultured dental pulp fibroblasts, G-CSF was detected by immunostaining, immunoprecipitation, and ELISA, and mRNAs of G-CSF, M-CSF, and GM-CSF were detected by RT-PCR. The dental pulp fibroblasts cultured with TNF-alpha were found to increase the G-CSF expression and to produce M-CSF and GM-CSF. These findings suggest that dental pulp fibroblasts usually produce G-CSF. In the presence of TNF-alpha, dental pulp fibroblast express M-CSF and GM-CSF.
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Affiliation(s)
- Y Sawa
- Department of Oral Functional Science, Graduate School of Dental Medicine, Hokkaido University, N13 W7, Kita-ku, Sapporo 060-8586, Japan.
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50
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Abstract
BACKGROUND Antisecretory therapy may exacerbate Helicobacter pylori corpus gastritis. The rate and mechanism(s) remain unknown. AIM To investigate the early events in proton pump inhibitor therapy on antral and corpus H. pylori gastritis. METHODS Nine H. pylori-infected volunteers underwent gastric biopsy with jumbo forceps for culture and histology. Histology was scored in the range 0-5 using a visual analogue scale. The depth of inflammation in gastric pits was scored in the range 1-3 (superficial or less than one-third, one-third to two-thirds and greater than two-thirds of the gastric pit, respectively). Tissue interleukin-1 beta and interleukin-8 levels were measured by enzyme-linked immunoabsorbent assay. Omeprazole, 20 mg b.d., was given for 6.5 days and biopsies were repeated on day 7. RESULTS Proton pump inhibitor therapy resulted in a fall in H. pylori density in the antrum and corpus. Inflammation and tissue levels of interleukin-8 and interleukin-1 beta decreased in the antrum and increased in the corpus mucosa. There was a significant increase in the depth of inflammation to include the proliferative zone in the corpus. CONCLUSIONS Within 1 week of starting proton pump inhibitor therapy, there was a marked extension of corpus inflammation into the gastric pit and an increase in corpus mucosal interleukin-1 beta and interleukin-8 levels. H. pylori eradication should be considered for all patients receiving long-term antisecretory therapy.
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Affiliation(s)
- D Y Graham
- Department of Medicine, Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas 77030, USA.
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