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Kim JS, Chowdhury N, Yamasaki R, Wood TK. Viable but non-culturable and persistence describe the same bacterial stress state. Environ Microbiol 2018; 20:2038-2048. [PMID: 29457686 DOI: 10.1111/1462-2920.14075] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 02/01/2018] [Accepted: 02/13/2018] [Indexed: 11/30/2022]
Abstract
Bacteria are often thought of as having two dormant phenotypes: the viable but non-culturable (VBNC) state and the persister state. Here we investigate the relatedness of the two stress-induced phenotypes at the single-cell level and examine cell morphology and quantify cell resuscitation. Using the classic starvation conditions to create VBNC cells, we found that the majority of the remaining Escherichia coli population are spherical, have empty cytosol and fail to resuscitate; however, some of the spherical cells resuscitate immediately (most probably those with dense cytosol). Critically, all the culturable cells in this starved population became persister cells within 14 days of starvation. We found that the persister cells initially are rod-like, have clear but limited membrane damage, can resuscitate immediately and gradually become spherical by aging. After 24 h, only rod-shaped persister cells survive, and all the spherical cells lyse. Both cell populations formed under the VBNC-inducing conditions and the persister conditions are metabolically inactive. Therefore, the bacterial population consists of dead cells and persister cells in the VBNC-inducing conditions; that is, the non-lysed particles that do not resuscitate are dead, and the dormant cells that resuscitate are persister cells. Hence, 'VBNC' and 'persister' describe the same dormant phenotype.
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Kim JS, Yamasaki R, Song S, Zhang W, Wood TK. Single cell observations show persister cells wake based on ribosome content. Environ Microbiol 2018. [PMID: 29528544 DOI: 10.1111/1462-2920.14093] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Since persister cells survive antibiotic treatments through dormancy and resuscitate to reconstitute infections, it is imperative to determine the rate at which these cells revive. Using two sets of Escherichia coli persister cells, those arising after antibiotic treatment at low levels and those generated at high levels by ceasing transcription via rifampicin pretreatment (shown to be bona fide persisters through eight sets of experiments), we used microscopy of single cells to determine that the resuscitation of dormant persisters is heterogeneous and includes cells that grow immediately. In all, five phenotypes were found during the observation of persister cells when fresh nutrients were added: (i) immediate division, (ii) immediate elongation followed by division, (iii) immediate elongation but no division, (iv) delayed elongation/division and (v) no growth. In addition, once cell division begins, the growth rate is that of exponential cells. Critically, the greater the ribosome content, the faster the persister cells resuscitate.
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Guzailiayi M, Shinoda K, Nakamura Y, Masaki K, Matsushita T, Yamasaki R, Yoshikai Y, Kira J. Derangement of gamma deltaγδ t cell subsets is associated with disease severity of multiple sclerosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shinoda K, Matsushita T, Nakamura Y, Masaki K, Yamasaki R, Togao O, Hiwatashi A, Kira J. HLA–DRB1*04:05 is associated with intracortical lesions on 3-dimensional double inversion recovery imaging in Japanese patients with multiple sclerosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Matsushita T, Nakamura Y, Niino M, Fukaura H, Tanaka M, Ochi H, Kanda T, Yokota T, Matsui M, Kusunoki S, Terayama Y, Kawachi I, Ohashi T, Shimohama S, Nishiyama K, Nakatsuji Y, Suzumura A, Ochi K, Yamamoto K, Yamasaki R, Kawano Y, Tsuji S, Hinomura A, Tada M, Matsuyama A, Shimizu Y, Nagaishi A, Okada K, Shinoda K, Isobe N, Kira J. Clinical and genetic features of Japanese patients with multiple sclerosis and neuromyelitis optica spectrum disorder based on Japan multiple sclerosis biobank. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tanaka K, Matsumoto S, Murai H, Yamasaki R, Kira J. Measurement conditions of end-diastolic ratio of common carotid arteries alter diagnostic ability for large artery intracranial occlusive disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kaida K, Kadoya M, Koike H, Iijima M, Takazaki H, Ogata H, Moriguchi K, Shimizu J, Nagata E, Takizawa S, Chiba A, Yamasaki R, Kira J, Sobue G, Ikewaki K. Diagnostic utility of ELISA for anti-neurofascin 155 antibodies in chronic inflammatory demyelinating polyradiculoneuropathy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Koike H, Kadoya M, Kaida K, Nishi R, Ikeda S, Kawagashira Y, Iijima M, Kato D, Ogata H, Yamasaki R, Matsukawa N, Kira J, Katsuno M, Sobue G. Paranodal axo-glial detachment in chronic inflammatory demyelinating polyneuropathy with anti-neurofascin-155 and anti-contactin-1 antibodies. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mezaki N, Miura T, Ogaki K, Eriguchi M, Mizuno Y, Komatsu K, Yamazaki H, Ono N, Kawajiri S, Yamasaki R, Nozaki H, Kasuga K, Okuma Y, Kira J, Hara H, Onodera O, Ikeuchi T. LMNB1-related adult-onset autosomal dominant leukodystrophy: Genetic and clinical studies of four Japanese families. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Saitoh B, Yamasaki R, Van Kruining D, Kira J. Early postnatal allergen exposure induces autism-like behavior in male mice. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ogata H, Yamasaki R, Matsushita T, Kadoya M, Kaida K, Matsui M, Kuwabara S, Kusunoki S, Kira J. Proposal of diagnostic criteria for anti-neurofascin 155 antibody-associated neuropathy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Une H, Yamaguchi H, Zhao Y, Shinoda K, Masaki K, Götz M, Yamasaki R, Kira J. Experimental autoimmune encephalomyelitis is ameliorated in mice with gray matter astroglia-specific inducible connexin 43 knock-out. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yamashita K, Uehara T, Pukovisa P, Taniwaki Y, Utsunomiya H, Yamasaki R, Kira J. Functional connectivity changes related to cognitive improvement by acetylcholine esterase inhibitors in Alzheimer disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hayashi S, Yamasaki R, Okamoto K, Murai H, Kira J. Distinct distribution of activated microglia/macrophages and dendritic cells in the spinal white matter of amyotrophic lateral sclerosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yamasaki R, Takatsuji Y, Morimoto M, Ishikawa S, Fujinami T, Haruyama T. Sustainable process for functional group introduction onto HOPG by exposing OH and 1O2 using a radical vapor reactor (RVR) without any chemical reagents. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kumagai S, Yamasaki R, Kameda T, Saito Y, Watanabe A, Watanabe C, Teramae N, Yoshioka T. Tandem μ-reactor-GC/MS for online monitoring of aromatic hydrocarbon production via CaO-catalysed PET pyrolysis. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00097a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Online monitoring of products by a tandem μ-reactor-GC/MS system revealed the CaO catalysed PET pyrolysis pathway.
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Shinoda K, Iwata T, Nakamura Y, Masaki K, Matsushita T, Yamasaki R, Kira JI. Minocycline-induced human herpesvirus 6 encephalomyelitis with drastically disseminated contrast-enhanced lesions. Eur J Neurol 2016; 23:e76-e77. [PMID: 27882729 DOI: 10.1111/ene.13190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 09/16/2016] [Indexed: 11/27/2022]
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Yamasaki R, Haruyama T. Formation Mechanism of Flattened Top HFBI Domical Droplets. J Phys Chem B 2016; 120:3699-704. [DOI: 10.1021/acs.jpcb.6b01306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yamasaki R, Takatsuji Y, Asakawa H, Fukuma T, Haruyama T. Flattened-Top Domical Water Drops Formed through Self-Organization of Hydrophobin Membranes: A Structural and Mechanistic Study Using Atomic Force Microscopy. ACS NANO 2016; 10:81-87. [PMID: 26595357 DOI: 10.1021/acsnano.5b04049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Trichoderma reesei hydrophobin, HFBI, is a unique structural protein. This protein forms membranes by self-organization at air/water or water/solid interfaces. When HFBI forms a membrane at an air/water interface, the top of the water droplet is flattened. The mechanism underlying this phenomenon has not been explored. In this study, this unique phenomenon has been investigated. Self-organized HFBI membranes form a hexagonal structured membrane on the surface of water droplets; the structure was confirmed by atomic force microscopy (AFM) measurement. Assembled hexagons can form a planar sheet or a tube. Self-organized HFBI membranes on water droplets form a sheet with an array of hexagonal structures or a honeycomb structure. This membrane, with its arrayed hexagonal structures, has very high buckling strength. We hypothesized that the high buckling strength is the reason that water droplets containing HFBI form flattened domes. To test this hypothesis, the strength of the self-organized HFBI membranes was analyzed using AFM. The buckling strength of HFBI membranes was measured to be 66.9 mN/m. In contrast, the surface tension of water droplets containing dissolved HFBI is 42 mN/m. Thus, the buckling strength of a self-organized HFBI membrane is higher than the surface tension of water containing dissolved HFBI. This mechanistic study clarifies why the water droplets formed by self-organized HFBI membranes have a flattened top.
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Kikuchi M, Akahoshi Y, Nakano H, Ugai T, Wada H, Yamasaki R, Sakamoto K, Kawamura K, Ishihara Y, Sato M, Ashizawa M, Terasako-Saito K, Kimura S, Yamazaki R, Kanda J, Kako S, Nishida J, Kanda Y. Risk factors for pre- and post-engraftment bloodstream infections after allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2015; 17:56-65. [PMID: 25580541 DOI: 10.1111/tid.12345] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 08/29/2014] [Accepted: 11/03/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND Bloodstream infections (BSI) are frequently observed after allogeneic hematopoietic stem cell transplant (HSCT), and could cause morbidity and mortality. METHODS We retrospectively evaluated the incidence, characteristics of, and risk factors for BSI at both pre- and post-engraftment in 209 adult HSCT patients at our institute between June 2006 and December 2013. The median age at transplantation was 45 years (range, 15-65). A total of 122 patients received bone marrow, 68 received peripheral blood stem cells, and 19 received umbilical cord blood. RESULTS The cumulative incidences of pre- and post-engraftment BSI were 38.9% and 17.2%, respectively. Nine patients had both pre- and post-engraftment BSI. In the pre- and post-engraftment periods, respectively, 67.4% and 84.1% of isolates were gram-positive bacteria (GPB), 28.3% and 11.4% were gram-negative bacteria (GNB), and 4.3% and 4.5% were fungi. Coagulase-negative staphylococci were the most commonly isolated GPB, while Stenotrophomonas maltophilia and Pseudomonas aeruginosa were the most commonly isolated GNB. Pre-engraftment BSI was associated with an increased risk of death. Overall survival at day 180 for patients with or without pre-engraftment BSI was 70.0% and 82.7%, respectively (P = 0.02). CONCLUSIONS Risk factors for BSI in the pre-engraftment period were the interval between diagnosis and transplantation (261 days or more), engraftment failure, and high-risk disease status at HSCT in a multivariate analysis. No significant risk factor for BSI in the post-engraftment period was identified by a univariate analysis. These findings may be useful for deciding upon empiric antibacterial treatment for HSCT recipients.
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Kimura SI, Murata T, Akahoshi Y, Nakano H, Ugai T, Wada H, Yamasaki R, Ishihara Y, Kawamura K, Sakamoto K, Ashizawa M, Sato M, Terasako-Saito K, Nakasone H, Kikuchi M, Yamazaki R, Kako S, Kanda J, Tanihara A, Nishida J, Kanda Y. Economic evaluation of a preemptive treatment strategy for invasive fungal infection in neutropenic patients with hematological diseases. Eur J Clin Microbiol Infect Dis 2015; 34:951-61. [PMID: 25577175 DOI: 10.1007/s10096-014-2311-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 12/29/2014] [Indexed: 02/03/2023]
Abstract
We compared the expected medical costs of empirical and preemptive treatment strategies for invasive fungal infection in neutropenic patients with hematological diseases. Based on the results of two clinical trials with different backgrounds reported by Oshima et al. [J Antimicrob Chemother 60(2):350-355; Oshima study] and Cordonnier et al. [Clin Infect Dis 48(8):1042-1051; PREVERT study], we developed a decision tree model that represented the outcomes of empirical and preemptive treatment strategies, and estimated the expected medical costs of medications and examinations in the two strategies. We assumed that micafungin was started in the empirical group at 5 days after fever had developed, while voriconazole was started in the preemptive group only when certain criteria, such as positive test results of imaging studies and/or serum markers, were fulfilled. When we used an incidence of positive test results of 6.7 % based on the Oshima study, the expected medical costs of the empirical and preemptive groups were 288,198 and 150,280 yen, respectively. Even in the case of the PREVERT study, in which the incidence of positive test results was 32.9 %, the expected medical costs in the empirical and preemptive groups were 291,871 and 284,944 yen, respectively. A sensitivity analysis indicated that the expected medical costs in the preemptive group would exceed those in the empirical group when the incidence of positive test results in the former was over 34.4 %. These results suggest that a preemptive treatment strategy can be expected to reduce medical costs compared with empirical therapy in most clinical settings.
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Terasako-Saito K, Nakasone H, Tanaka Y, Yamazaki R, Sato M, Sakamoto K, Ishihara Y, Kawamura K, Akahoshi Y, Hayakawa J, Wada H, Harada N, Nakano H, Kameda K, Ugai T, Yamasaki R, Ashizawa M, Kimura SI, Kikuchi M, Tanihara A, Kanda J, Kako S, Nishida J, Kanda Y. Persistence of recipient-derived as well as donor-derived clones of cytomegalovirus pp65-specific cytotoxic T cells long after allogeneic hematopoietic stem cell transplantation. Transpl Infect Dis 2014; 16:930-40. [DOI: 10.1111/tid.12318] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/14/2014] [Indexed: 11/27/2022]
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48
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Yamazaki R, Tanaka Y, Nakasone H, Sato M, Terasako-Saito K, Sakamoto K, Akahoshi Y, Nakano H, Ugai T, Yamasaki R, Wada H, Ishihara Y, Kawamura K, Ashizawa M, Kimura SI, Kikuchi M, Kako S, Kanda J, Tanihara A, Nishida J, Kanda Y. Allotype analysis to determine the origin of cytomegalovirus immunoglobulin-G after allogeneic stem cell transplantation. Transpl Infect Dis 2014; 16:904-13. [DOI: 10.1111/tid.12304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 07/17/2014] [Accepted: 08/07/2014] [Indexed: 11/26/2022]
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49
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Nakasone H, Tanaka Y, Yamazaki R, Terasako K, Sato M, Sakamoto K, Yamasaki R, Wada H, Ishihara Y, Kawamura K, Machishima T, Ashizawa M, Kimura SI, Kikuchi M, Tanihara A, Kanda J, Kako S, Nishida J, Kanda Y. Single-cell T-cell receptor-β analysis of HLA-A*2402-restricted CMV- pp65-specific cytotoxic T-cells in allogeneic hematopoietic SCT. Bone Marrow Transplant 2013; 49:87-94. [DOI: 10.1038/bmt.2013.122] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 04/19/2013] [Accepted: 05/23/2013] [Indexed: 11/09/2022]
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50
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Takatsuji Y, Yamasaki R, Iwanaga A, Lienemann M, Linder MB, Haruyama T. Solid-support immobilization of a "swing" fusion protein for enhanced glucose oxidase catalytic activity. Colloids Surf B Biointerfaces 2013; 112:186-91. [PMID: 23974004 DOI: 10.1016/j.colsurfb.2013.07.051] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 07/10/2013] [Accepted: 07/26/2013] [Indexed: 02/04/2023]
Abstract
The strategic surface immobilization of a protein can add new functionality to a solid substrate; however, protein activity, e.g., enzymatic activity, can be drastically decreased on immobilization onto a solid surface. The concept of a designed and optimized "molecular interface" is herein introduced in order to address this problem. In this study, molecular interface was designed and constructed with the aim of attaining high enzymatic activity of a solid-surface-immobilized a using the hydrophobin HFBI protein in conjunction with a fusion protein of HFBI attached to glucose oxidase (GOx). The ability of HFBI to form a self-organized membrane on a solid surface in addition to its adhesion properties makes it an ideal candidate for immobilization. The developed fusion protein was also able to form an organized membrane, and its structure and immobilized state on a solid surface were investigated using QCM-D measurements. This method of immobilization showed retention of high enzymatic activity and the ability to control the density of the immobilized enzyme. In this study, we demonstrated the importance of the design and construction of molecular interface for numerous purposes. This method of protein immobilization could be utilized for preparation of high throughput products requiring structurally ordered molecular interfaces, in addition to many other applications.
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