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Tsukizawa Y, Muguruma K, Hayashi M, Eto F, Tachiyama K, Ishibashi H, Sugimoto T, Fujii H, Agari D, Kurokawa K, Yamawaki T. Efficacy of immunotherapy in retinal vasculopathy with cerebral leukodystrophy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2728] [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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Fujii H, Kurokawa K, Hayashi M, Eto F, Tachiyama K, Ishibashi H, Sugimoto T, Agari D, Sonoo M, Yamawaki T. Clinical features and tibial nerve somatosensory evoked potential findings in patients with neuromyelitis optica spectrum disorder. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.710] [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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Sugimoto T, Ochi K, Kohriyama T, Hayashi M, Tachiyama K, Ishibashi H, Fujii H, Kurokawa K, Yamawaki T, Matsumoto M, Maruyama H. Long term course and malignancy as a prognostic factor of chronic inflammatory demyelinating polyneuropathy. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3038] [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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Ishii M, Suda Y, Kurokawa K, Nakano A. COPI is essential for Golgi cisternal maturation and dynamics. J Cell Sci 2016; 129:3251-61. [PMID: 27445311 PMCID: PMC5047698 DOI: 10.1242/jcs.193367] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 07/15/2016] [Indexed: 02/02/2023] Open
Abstract
Proteins synthesized in the endoplasmic reticulum (ER) are transported to the Golgi and then sorted to their destinations. For their passage through the Golgi, one widely accepted mechanism is cisternal maturation. Cisternal maturation is fulfilled by the retrograde transport of Golgi-resident proteins from later to earlier cisternae, and candidate carriers for this retrograde transport are coat protein complex I (COPI)-coated vesicles. We examined the COPI function in cisternal maturation directly by 4D observation of the transmembrane Golgi-resident proteins in living yeast cells. COPI temperature-sensitive mutants and induced degradation of COPI proteins were used to knockdown COPI function. For both methods, inactivation of COPI subunits Ret1 and Sec21 markedly impaired the transition from cis to medial and to trans cisternae. Furthermore, the movement of cisternae within the cytoplasm was severely restricted when COPI subunits were depleted. Our results demonstrate the essential roles of COPI proteins in retrograde trafficking of the Golgi-resident proteins and dynamics of the Golgi cisternae. Highlighted Article: Knockdown of COPI function restricts retrograde recycling of Golgi-resident proteins and markedly impairs the transition from cis to medial and to trans cisternae, as demonstrated in living yeast cells.
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Kurokawa K, Suda Y, Nakano A. Sar1 localizes at the rims of COPII-coated membranes in vivo. J Cell Sci 2016; 129:3231-7. [PMID: 27432890 PMCID: PMC5047700 DOI: 10.1242/jcs.189423] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 07/12/2016] [Indexed: 12/31/2022] Open
Abstract
The Sar1 GTPase controls coat assembly on coat protein complex II (COPII)-coated vesicles, which mediate protein transport from the endoplasmic reticulum (ER) to the Golgi. The GTP-bound form of Sar1, activated by the ER-localized guanine nucleotide exchange factor (GEF) Sec12, associates with the ER membrane. GTP hydrolysis by Sar1, stimulated by the COPII-vesicle-localized GTPase-activating protein (GAP) Sec23, in turn causes Sar1 to dissociate from the membrane. Thus, Sar1 is cycled between active and inactive states, and on and off vesicle membranes, but its precise spatiotemporal regulation remains unknown. Here, we examined Sar1 localization on COPII-coated membranes in living Saccharomyces cerevisiae cells. Two-dimensional (2D) observation demonstrated that Sar1 showed modest accumulation around the ER exit sites (ERES) in a manner that was dependent on Sec16 function. Detailed three-dimensional (3D) observation further demonstrated that Sar1 localized at the rims of the COPII-coated membranes, but was excluded from the rest of the COPII membranes. Additionally, a GTP-locked form of Sar1 induced abnormally enlarged COPII-coated structures and covered the entirety of these structures. These results suggested that the reversible membrane association of Sar1 GTPase leads to its localization being restricted to the rims of COPII-coated membranes in vivo.
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Nagami GT, Kurokawa K. Ammonia production by isolated perfused mouse proximal tubules. CONTRIBUTIONS TO NEPHROLOGY 2015; 47:105-9. [PMID: 4064681 DOI: 10.1159/000411215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Mizuno K, Kurokawa K, Ohkuma S. SY23-1 * BASIC RESEARCH OF ALCOHOL DEPENDENCE. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu052.99] [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] Open
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Fontsere N, Mestres G, Burrel M, Barrufet M, Montana X, Arias M, Ojeda R, Maduell F, Campistol JM, Nagaraja P, Rees D, Husein T, Chess J, Lin CC, Yang WC, Khosravi M, Kandil H, Cross J, Hopkins S, Collier S, Lopes D, Pereira S, Gomes AM, Ventura A, Martins V, Seabra J, Rothuizen TC, Damanik F, Visser MJT, Lavrijsen T, Cox MAJ, Moroni L, Rabelink TJ, Rotmans JI, Fontsere N, Cardozo C, Donate J, Soriano A, Muros M, Pons M, Mensa J, Campistol JM, Navarro-Gonzalez JF, Maduell F, Wijewardane A, Murley A, Powers S, Allen C, Baharani J, Wilmink T, Esenturk M, Zengin M, Dal M, Tahtal N, Shibata K, Shinzato T, Satta H, Nishihara M, Koguchi N, Kuji T, Kawata S, Kaneda T, Yasuda G, Scrivano J, Pettorini L, Rutigliano T, Ciavarella GM, De Biase L, Punzo G, Mene P, Pirozzi N, El Haggan W, Belazrague K, Ehoussou S, Foucher V, El Salhy M, Ouellet G, Davis J, Caron P, Leblanc M, Pettorini L, Romitelli F, Fazzari L, Scrivano J, Ortu G, Di Stasio E, Punzo G, Mene P, Pirozzi N, Loizzo G, Vigano SM, Bacchini G, Rocchi E, Sala V, Pontoriero G, Letachowicz K, Go biowski T, Kusztal M, Letachowicz W, Weyde W, Klinger M, Murley A, Wijewardane A, Powers S, Allen C, Hollingsworth L, Wilmink T, Baharani J, Roca-Tey R, Samon R, Ibrik O, Roda A, Gonzalez-Oliva JC, Martinez-Cercos R, Viladoms J, Renaud CJ, Lim EK, Seow TY, Teh HS, Tosic J, Jankovic A, Djuric P, Radovic Maslarevic V, Popovic J, Dimkovic N, Kazantzi A, Trigka K, Buono F, Laurino S, Toriello G, Di Luccio R, Galise A, Kim YO, Yoon SA, Kim YS, Choi SJ, Min JW, Cheong MA, Asano M, Oguchi K, Saito A, Onishi Y, Yamamoto Y, Fukuhara S, Akiba T, Akizawa T, Kurokawa K, Guedes Marques M, Ibeas J, Maia P, Ponce P, Chang KY, Park HS, Kim HW, Choi BS, Park CW, Yang CW, Jin DC, Likaj E, Seferi S, Caco G, Petrela E, Barbullushi M, Idrizi A, Thereska N, Lomonte C, Casucci F, Libutti P, Lisi P, Basile C, Ancarani P, Valsuani G, Cavallo L, Parodi D, Lorusso C, Renaud C, Lai BC, Tho S, Yeoh L, Guedes Marques M, Botelho C, Maia P, Ponce P, Yankovoy A, Alexandr S, Smoliacov A, Stepanov V, Rees D, Parker C, Davies P, Taylor S, Mikhail A, Kim YO, Yoon SA, Kim YS, Choi SJ, Min JW, Cheong MA, Gubensek J, Persic V, Vajdic B, Ponikvar R, Buturovic-Ponikvar J, Hadimeri U, Warme AV, Stegmayr B, Jankovic A, Suvakov S, Tosic J, Damjanovic T, Djuric P, Bajcetic S, Radovic-Maslarevic V, Popovic J, Simic T, Dimkovic N, Likaj E, Seferi S, Petrela E, Idrizi A, Rroji M, Barbullushi M, Thereska N, Chua HL, Kanda H, See SL, Liew NC, Tsuchida K, Tomo T, Fukasawa M, Kawashima S, Minakuchi J, Thanaraj V, Dhaygude A, Ikeda K, Forneris G, Cecere P, Pozzato M, Trogolo M, Vallero A, Mesiano P, Roccatello D, Esenturk M, Zengin M, Keskin L, Loizzo G, Vigano SM, Bacchini G, Rocchi E, Sala V, Pontoriero G, Casey JR, Hanson CS, Winkelmayer WC, Craig J, Palmer S, Strippoli G, Tong A, Ferrara D, Scamarda S, Bernardino L, Amico L, Lorito MC, Incalcaterra F, Visconti L, Visconti G, Valenza F, D'Amato F, Di Napoli A, Tazza L, Chicca S, Lapucci E, Silvestri P, Di Lallo D, Michelozzi P, Davoli M. DIALYSIS VASCULAR ACCESS. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kurokawa K, Okamoto M, Nakano A. Contact of cis-Golgi with ER exit sites executes cargo capture and delivery from the ER. Nat Commun 2014; 5:3653. [PMID: 24728174 PMCID: PMC3996532 DOI: 10.1038/ncomms4653] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Accepted: 03/14/2014] [Indexed: 12/19/2022] Open
Abstract
Protein transport from the endoplasmic reticulum (ER) to the Golgi apparatus is mediated by coat complex II (COPII) vesicles. It has been believed that COPII vesicles containing cargo are released from the ER exit sites (ERES) into the cytosol and then reach and fuse with the first post-ER compartment, cis-Golgi or ER-to-Golgi intermediate compartment (ERGIC). However, it still remains elusive how cargo loading to vesicles, vesicle budding, tethering and fusion are coordinated in vivo. Here we show, using extremely high speed and high resolution confocal microscopy, that the cis-Golgi in the budding yeast Saccharomyces cerevisiae approaches and contacts the ERES. The COPII coat cage then collapses and the cis-Golgi captures cargo. The cis-Golgi, thus loaded with cargo, then leaves the ERES. We propose that this ‘hug-and-kiss’ behaviour of cis-Golgi ensures efficient and targeted cargo transport from the ERES to cis-Golgi. Protein traffic from the endoplasmic reticulum (ER) to the Golgi is mediated by COPII-coated vesicles that bud from ER exit sites and fuse with the cis-Golgi. Kurokawa et al. show that in budding yeast, the cis-Golgi reaches out to ER exit sites in a ‘hug-and-kiss’ mechanism to facilitate cargo transfer.
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An JH, Kurokawa K, Jung DJ, Fujimoto Y, Fukase K, Lee B. Human serum amyloid P component is a novel peptidoglycan recognition protein inducing complement-independent phagocytosis of Staphylococcus aureus. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.173] [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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Mizuno K, Kurokawa K, Ohkuma S. Regulation of type 1 IP3 receptor expression by dopamine D2-like receptors via AP-1 and NFATc4 activation. Neuropharmacology 2013; 71:264-72. [DOI: 10.1016/j.neuropharm.2013.03.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/27/2013] [Accepted: 03/29/2013] [Indexed: 10/27/2022]
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Griva K, Mooppil N, Pala Krishnan DS, McBain H, Newman SP, Tripepi G, Pannier B, Mallamaci F, London G, Zoccali C, Sood M, Manns B, Kappel J, Naimark D, Dart A, Komenda P, Rigatto C, Hiebert B, Tangri N, Perl J, Karaboyas A, Tentori F, Morgenstern H, Sen A, Rayner H, Vanholder R, Combe C, Hasegawa T, Mapes D, Robinson B, Pisoni R, Tentori F, Zepel L, Karaboyas A, Mendelssohn D, Ikizler T, Pisoni R, Fukuhara S, Gillespie B, Bieber B, Robinson B, Wilkie M, Karaboyas A, Rayner H, Fluck R, Morgenstern H, Li Y, Kerr P, Mendelssohn D, Wikstrom B, Tentori F, Pisoni R, Robinson B, Vanita Jassal S, Comment L, Karaboyas A, Bieber B, Morgenstern H, Sen A, De Sequera P, Marshall M, Fukuhara S, Robinson B, Pisoni R, Jin HM, Pan Y, Raimann JG, Etter M, Kooman J, Levin N, Marcelli D, Marelli C, van der Sande F, Thijssen S, Usvyat L, Kotanko P, Lu KC, Yang HY, Su SL, Palmer S, Saglimbene V, Ruospo M, Craig J, Celia E, Gelfman R, Stroumza P, Bednarek A, Dulawa J, Frazao J, Del Castillo D, Ecder T, Hegbrant J, Strippoli GFM, Hecking M, Bieber B, Ethier J, Kautzky-Willer A, Jadoul M, Saito A, Sunder-Plassmann G, Saemann M, Gillespie B, Horl W, Mariani L, Ramirez S, Pisoni R, Robinson B, Port F, Mallamaci F, Tripepi G, Leonardis D, Zoccali C, Fukuma S, Akizawa T, Akiba T, Saito A, Kurokawa K, Fukuhara S, Pannier B, Tripepi G, Mallamaci F, Zoccali C, London G, Stack AG, Casserly LF, Abdalla AA, Murthy BVR, Hegarty A, Cronin CJ, Hannigan A, Shaw C, Pitcher D, Sandford R, Spoto B, Pizzini P, Cutrupi S, D'Arrigo G, Tripepi G, Zoccali C, Mallamaci F, Ghalia K, Gubensek J, Arnol M, Ponikvar R, Buturovic-Ponikvar J, Palmer S, de Berardis G, Craig JC, Pellegrini F, Ruospo M, Tong A, Tonelli M, Hegbrant J, Strippoli GFM, Pizzini P, Torino C, Cutrupi S, Spoto B, D'Arrigo G, Tripepi R, Tripepi G, Zoccali C, Mallamaci F, von Gersdorff G, Usvyat L, Schaller M, Wong M, Thijssen S, Marcelli D, Barth C, Kotanko P, Torino C, D'Arrigo G, Postorino M, Tripepi G, Mallamaci F, Zoccali C, Chanouzas D, Ng KP, Baharani J, Endo M, Nakamura Y, Hara M, Murakami T, Tsukahara H, Watanabe Y, Matsuoka Y, Fujita K, Inoue M, Simizu T, Gotoh H, Goto Y, Delanaye P, Cavalier E, Moranne O, Krzesinski JM, Warling X, Smelten N, Pottel H, Schneider S, Malecki AK, Haller HG, Boenisch O, Kielstein JT, Movilli E, Camerini C, Gaggia P, Zubani R, Feller P, Poiatti P, Pola A, Carli O, Valzorio B, Possenti S, Bregoli L, Foini P, Cancarini G, Palmer S, Ruospo M, Natale P, Gargano L, Saglimbene V, Pellegrini F, Johnson DW, Craig JC, Hegbrant J, Strippoli GFM, Brunelli S, Krishnan M, Van Wyck D, Provenzano R, Goykhman I, Patel C, Nissenson A, De Mauri A, Conte MM, Chiarinotti D, David P, Capurro F, De Leo M, Postorino M, Marino C, Vilasi A, Tripepi G, Zoccali C, Dialysis C, Helps A, Edwards G, Mactier R, Coia J, Abe Y, Ito K, Ogahara S, Sasatomi Y, Saito T, Nakashima H, Jean-Charles C, Morgane V, Leila P, Carole S, Pierre-Louis C, Philippe Z, Jean-Francois T, Couchoud C, Dantony E, Guerrin MH, Villar E, Ecochard R, Nishi S, Goto S, Nakai K, Kono K, Yonekura Y, Ito J, Fujii H, Korkmaz S, Ersoy A, Gulten S, Ercan I, Koca N, Serdengecti K, Suleymanlar G, Altiparmak M, Seyahi N, Jager K, Trabulus S, Erek E, Cobo Jaramillo G, Gallar P, Di Gioia C, Rodriguez I, Ortega O, Herrero JC, Oliet A, Vigil A, Pechter U, Luman M, Ilmoja M, Sinimae E, Auerbach A, Lilienthal K, Kallaste M, Sepp K, Piel L, Seppet E, Muliin M, Telling K, Seppet E, Kolvald K, Veermae K, Ots-Rosenberg M, Ambrus C, Kerkovits L, Szegedi J, Benke A, Toth E, Nagy L, Borbas B, Rozinka A, Nemeth J, Varga G, Kulcsar I, Gergely L, Szakony S, Kiss I, Koo JR, Choi MJ, Yoon MH, Park JY, No EY, Seo JW, Lee YK, Noh JW. Epidemiology - CKD 5D II. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kurokawa K, Ishii M, Suda Y, Ichihara A, Nakano A. Live cell visualization of Golgi membrane dynamics by super-resolution confocal live imaging microscopy. Methods Cell Biol 2013; 118:235-42. [PMID: 24295310 DOI: 10.1016/b978-0-12-417164-0.00014-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Super-resolution confocal live imaging microscopy we developed provides cutting-edge high-speed live cell imaging at high space resolution. With this technology we are now able to observe details of membrane traffic events, including behaviors of small vesicles, cisternal maturation of the Golgi apparatus, and membrane segregation within a compartment.
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Trimble EL, Ledermann J, Law K, Miyata T, Imamura CK, Nam BH, Kim YH, Bang YJ, Michaels M, Ardron D, Amano S, Ando Y, Tominaga T, Kurokawa K, Takebe N. International models of investigator-initiated trials: implications for Japan. Ann Oncol 2012; 23:3151-3155. [PMID: 22843420 PMCID: PMC3501232 DOI: 10.1093/annonc/mds168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 03/05/2012] [Accepted: 04/23/2012] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Academic/institutional investigator-initiated clinical trials benefit individuals and society by supplementing gaps in industry-sponsored clinical trials. MATERIALS In May 2010, experts from Japan, the Republic of Korea, the UK, and the United States, met at a symposium in Tokyo, Japan, to discuss how policies related to the conduct of clinical trials, which have been shown to be effective, may be applied to other regions of the world. RESULTS In order to increase the availability of anticancer drugs world-wide, nations including Japan should examine the benefits of increasing the number of investigator-initiated clinical trials. These trials represent one of the most effective ways to translate basic scientific knowledge into clinical practice. These trials should be conducted under GCP guidelines and include Investigational New Drug application submissions with the ultimate goal of future drug approval. CONCLUSIONS To maximize the effectiveness of these trials, a policy to educate health care professionals, cancer patients and their families, and the public in general on the benefits of clinical trials should be strengthened. Finally, policies that expedite the clinical development of novel cancer drugs which have already been shown to be effective in other countries are needed in many nations including Japan to accelerate drug approval.
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Kurokawa K, Mizuno K, Ohkuma S. Possible involvement of type 1 inositol 1,4,5-trisphosphate receptors up-regulated by dopamine D1 and D2 receptors in mouse nucleus accumbens neurons in the development of methamphetamine-induced place preference. Neuroscience 2012; 227:22-9. [DOI: 10.1016/j.neuroscience.2012.09.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 08/31/2012] [Accepted: 09/11/2012] [Indexed: 10/27/2022]
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Ikeda H, Kasahara K, Koba H, Kurokawa K, Nishikawa S, Sakai A, Tanbo Y, Araya T, Sone T, Fukuoka J, Fujimura M, Nakao S. Prognostic Impact of C-MET/phospho-MET and Topoisomerase I in Small-Cell Lung Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32440-6] [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] Open
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Koyama S, Kawanami T, Kurokawa K, Tanji H, Iseki C, Arawaka S, Wada M, Kato T. Carpal tunnel syndrome as an initial manifestation in a case of transthyretin-related familial amyloid polyneuropathy with a novel A120T mutation. Clin Neurol Neurosurg 2012; 114:707-9. [DOI: 10.1016/j.clineuro.2011.11.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 10/06/2011] [Accepted: 11/28/2011] [Indexed: 11/29/2022]
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Kurokawa K, Hemmi S, Izawa N, Nagai T, Sonoo M, Sunada Y. 69. Followup needle electromyography findings in parkinson’s disease patients with dropped head syndrome after steroid therapy. Clin Neurophysiol 2012. [DOI: 10.1016/j.clinph.2011.11.151] [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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Kobayashi A, Ando Y, Kurokawa K. Formation of high heat resistant coatings by using gas tunnel type plasma spraying. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2012; 12:5106-5110. [PMID: 22905586 DOI: 10.1166/jnn.2012.4945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
UNLABELLED Zirconia sprayed coatings are widely used as thermal barrier coatings (TBC) for high temperature protection of metallic structures. However, their use in diesel engine combustion chamber components has the long run durability problems, such as the spallation at the interface between the coating and substrate due to the interface oxidation. Although zirconia coatings have been used in many applications, the interface spallation problem is still waiting to be solved under the critical conditions such as high temperature and high corrosion environment. The gas tunnel type plasma spraying developed by the author can make high quality ceramic coatings such as Al2O3 and ZrO2 coating compared to other plasma spraying method. A high hardness ceramic coating such as Al2O3 coating by the gas tunnel type plasma spraying, were investigated in the previous study. The Vickers hardness of the zirconia (ZrO2) coating increased with decreasing spraying distance, and a higher Vickers hardness of about Hv = 1200 could be obtained at a shorter spraying distance of L = 30 mm. ZrO2 coating formed has a high hardness layer at the surface side, which shows the graded functionality of hardness. In this study, ZrO2 composite coatings (TBCs) with Al2O3 were deposited on SS304 substrates by gas tunnel type plasma spraying. The performance such as the mechanical properties, thermal behavior and high temperature oxidation resistance of the functionally graded TBCs was investigated and discussed. The resultant coating samples with different spraying powders and thickness are compared in their corrosion resistance with coating thickness as variables. Corrosion potential was measured and analyzed corresponding to the microstructure of the coatings. KEYWORDS High Heat Resistant Coatings, Gas Tunnel Type Plasma Spraying, Hardness,
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Nagai T, Kurokawa K, Kushida R, Hemmi S, Sunada Y. 27. The 6-min walk test as a parameter of the fatigability in Kennedy’s disease. Clin Neurophysiol 2012. [DOI: 10.1016/j.clinph.2011.11.110] [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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Okamoto M, Kurokawa K, Matsuura-Tokita K, Saito C, Hirata R, Nakano A. High-curvature domains of the ER are important for the organization of ER exit sites in Saccharomyces cerevisiae. J Cell Sci 2012; 125:3412-20. [PMID: 22467862 DOI: 10.1242/jcs.100065] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Protein export from the endoplasmic reticulum (ER) to the Golgi apparatus occurs at specialized regions known as the ER exit sites (ERES). In Saccharomyces cerevisiae, ERES appear as numerous scattered puncta throughout the ER. We examined ERES within the peripheral ER, finding that the proteins comprising the ERES localize on high-curvature ER domains where curvature-stabilizing protein Rtn1 is present. Δrtn1 Δrtn2 Δyop1 cells have fewer high-curvature ER domains, but ERES accumulate at the remaining high-curvature ER domains on the edge of expanded ER sheets. We propose that membrane curvature is a key geometric feature for the regulation of ERES localization. We also investigated a spatial relationship between ERES and Golgi cisternae. Golgi cisternae in S. cerevisiae are unstacked, dispersed, and moving in the cytoplasm with cis-cisternae positioned adjacent to ERES, whereas trans-cisternae are not. Morphological changes in the ER of Δrtn1 Δrtn2 Δyop1 cells resulted in aberrant Golgi structures, including cis- and trans-markers, and there was reduced movement at ERES between expanded ER sheets and the plasma membrane.
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Kobayashi A, Ando Y, Kurokawa K, Hejwowski T. Microstructure and thermal behaviour of plasma sprayed zirconia/alumina composite coating. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2011; 11:8853-8858. [PMID: 22400271 DOI: 10.1166/jnn.2011.3450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In thermal barrier coatings (TBC), failure occurs near or at the interface between the metallic bondcoat and topcoat. On high temperature conditions, an oxide scale which is named thermally grown oxide (TGO) occurs along the bond/topcoat interface. For diminishing the creation of TGO, a dense coating with low residual stress and thermal stress buffer layer was preferable. High hardness ceramic coatings could be obtained by gas tunnel type plasma spraying, and the deposited coating had superior property in comparison with those deposited by conventional type plasma spray method. In this study, the gas tunnel type plasma spraying system was utilized to produce a zirconia/alumina functionally graded thermal barrier coating and discussed its physical and mechanical properties, thermal behavior and high temperature oxidation resistance of the coating are discussed. Consequently, the proposed system exhibited superior mechanical properties and oxidation resistance at the expenses of a slightly lower thermal insulating effect. This interlayer is preferred in order to minimize the detrimental effect of the phase transformation of gamma-Al2O3 to alpha-Al2O3.
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Winkelmayer W, Liu J, Brookhart A, Wang HY, Kan WC, Chien CC, Fang TC, Lin HF, Li YH, Wang CH, Chou CL, Yazawa M, Shibagaki Y, Kimura K, Ohira S, Ryo K, Hasegawa T, Hanafusa N, Tsubakihara Y, Iseki K, Chen HY, Cheng IC, Pan YJ, Chiu YL, Hsu SP, Pai MF, Yang JY, Peng YS, Tsai TJ, Wu KD, Dzekova-Vidimliski P, Severova-Andreevska G, Pavlevska S, Trajceska L, Selim G, Gelev S, Sikole A, Hecking M, Karaboyas A, Saran R, Sen A, Inaba M, Horl WH, Pisoni R, Robinson B, Sunder-Plassmann G, Port FK, Chiroli S, Perrault L, Mitchell D, Mattin C, Krause R, Roth HJ, Schober-Halstenberg HJ, Edenharter G, Frei U, Wilson R, Adena M, Hodgkins P, Keith M, Smyth M, Couchoud C, Galland R, Man NK, Chanliau J, Lemaitre V, Traeger J, von Gersdorff G, Vega O, Schaller M, Usvyat L, Levin N, Barth C, Kotanko P, Vega O, Usvyat L, Rosales L, Thijssen S, Levin N, Kotanko P, Schmid H, Schiffl H, Romanos A, Lederer S, Chu KH, Lam B, Tang C, Wong S, Cheuk A, Yim KF, Tang HL, Lee W, Fung KS, Chan H, Ng TK, Tong KL, Doyle M, Severn A, Traynor J, Metcalfe W, Boyd J, Cairns S, Reilly J, Henderson A, Simpson K, Tovbin D, Douvdevani A, Novack V, Abd Elkadir A, Zlotnik M, Djuric Z, Dimkovic N, Popovic J, Furumatsu Y, Yamazaki S, Hayashino Y, Takegami M, Yamamoto Y, Kakudate N, Wakita T, Akizawa T, Akiba T, Saito A, Kurokawa K, Fukuhara S, Voronovitsky G, Pinelli L, Paganti L, Silva J, Garofalo R, Reiss E, Gimenez Torrado J, Lafroscia P, Lugo M, Laplante S, Vanovertveld P, Nordio M, Limido A, Maggiore U, Nichelatti M, Postorino M, Quintaliani G, Ebah L, Kanigicherla D, Nikam M, Dutton G, Mitra S, Attipoe L, Baharani J, Pinelli L, Voronovitsky G, Magrini G, Martorell A, Lugo M, Mashima Y, Konta T, Kudo K, Suzuki K, Ikeda A, Takasaki S, Kubota I, Chudek J, Wieczorowska-Tobis K, Wiecek A, Members of the "PolSenior" Study Group, des Grottes JM, Collart F, Lemaitre V, Maheut H, Couchoud C, Goodkin DA, Bieber B, Robinson BM, Jadoul M, Djogan M, Dudar I, Sergeyeva T, Hanafusa N, Yamagata K, Nishi H, Nishi S, Iseki K, Tsubakihara Y, Hommel K, Madsen M, Blicher TM, Kamper AL, Masakane I, Ito S, Seino M, Ito M, Nagasawa J, Rayner HC, Fuller DS, Gillespie BW, Hasegawa T, Morgenstern H, Robinson BM, Saran R, Tentori F, Pisoni RL, Chien CC, Wang JJ, Hwang JC, Wang HY, Kan WC, Trajceska L, Mladenovska D, Severova G, Amitov V, Selim G, Gelev S, Dzekova-Vidimliski P, Sikole A, Yadav P, Baharani J, Attipoe L, Baharani J, Carrero JJ, Jager DJ, Verduijn M, Ravani P, De Meester J, Heaf JG, Finne P, Hoitsma AJ, Pascual J, Jarraya F, Reisaeter AV, Collart F, Dekker FW, Jager KJ, Trajceska L, Mladenovska D, Severova G, Gelev S, Selim G, Amitov V, Sikole A, Sammut H, Ahmed MSA, Sheppard J, Attwood N, Cserep G, Sinnamon K, Pinelli L, Voronovitsky G, Lugo M, Reiss E, Katsipi I, Tatsiopoulos A, Doulgerakis C, Papanikolaou P, Kardouli E, Lamprinoudis G, Kintzoglanakis K, Gennadiou M, Kyriazis J, Granger Vallee A, Covic E, Morena M, Fournier A, Canaud B, Bolignano D, Rastelli S, Curatola G, Caridi G, Tripepi R, Tripepi G, Politi R, Catalano F, Delfino D, Ciccarelli M, Mallamaci F, Zoccali C. Epidemiology & outcome in CKD 5D (1). Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.41] [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] Open
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