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Kaneda T, Yoshioka H, Tamiya M, Tamiya A, Hata A, Okada A, Niwa T, Shiroyama T, Kanazu M, Ishida T, Katakami N. Differential efficacy of cisplatin plus pemetrexed between L858R and Del-19 in advanced EGFR-mutant non-squamous non-small cell lung cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw383.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kumagai S, Ishida T, Tachibana H, Ito A, Ito Y, Hashimoto T. Polybacterial aetiology and outcomes in patients with community-acquired pneumonia. Int J Tuberc Lung Dis 2016; 20:129-35. [PMID: 26688539 DOI: 10.5588/ijtld.15.0353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING Community-acquired pneumonia (CAP) is a common cause of morbidity and mortality worldwide. While interactions among bacterial pathogens in the respiratory tract have been studied, the impact of polybacterial aetiology on mortality has not been fully elucidated. OBJECTIVE To investigate the impact of polybacterial aetiology on mortality, prevalence, microbial patterns and clinical characteristics among CAP patients. DESIGN Retrospective data analysis. RESULTS Bacterial aetiology was established in 711 (46.0%) of 1544 enrolled hospitalised CAP patients. Of these, polybacterial aetiology was identified in 89 (12.5%): Streptococcus pneumoniae was the most frequently identified pathogen (n = 55, 61.8%). The most prevalent microbial combination was S. pneumoniae and Haemophilus influenzae (n = 19, 21.3%). Alcoholism and lack of previous antibiotic therapy were independent predictors of polybacterial aetiology. The proportion of patients with severe pneumonia was significantly higher in the polybacterial aetiology group than in the monobacterial group. Multivariate analysis showed that polybacterial aetiology was a predictor of 30-day mortality (OR 2.14, 95%CI 1.07-4.24, P = 0.030), independently of severe pneumonia status, pneumonia severity index, chronic obstructive pulmonary disease and inappropriate empirical therapy. CONCLUSION Polybacterial CAP tends to advance in severity, and indicates adverse outcomes.
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Richard E, Okumura K, Abe K, Haga Y, Hayato Y, Ikeda M, Iyogi K, Kameda J, Kishimoto Y, Miura M, Moriyama S, Nakahata M, Nakajima T, Nakano Y, Nakayama S, Orii A, Sekiya H, Shiozawa M, Takeda A, Tanaka H, Tomura T, Wendell R, Akutsu R, Irvine T, Kajita T, Kaneyuki K, Nishimura Y, Labarga L, Fernandez P, Gustafson J, Kachulis C, Kearns E, Raaf J, Stone J, Sulak L, Berkman S, Nantais C, Tanaka H, Tobayama S, Goldhaber M, Kropp W, Mine S, Weatherly P, Smy M, Sobel H, Takhistov V, Ganezer K, Hartfiel B, Hill J, Hong N, Kim J, Lim I, Park R, Himmel A, Li Z, O’Sullivan E, Scholberg K, Walter C, Wongjirad T, Ishizuka T, Tasaka S, Jang J, Learned J, Matsuno S, Smith S, Friend M, Hasegawa T, Ishida T, Ishii T, Kobayashi T, Nakadaira T, Nakamura K, Oyama Y, Sakashita K, Sekiguchi T, Tsukamoto T, Suzuki A, Takeuchi Y, Yano T, Cao S, Hiraki T, Hirota S, Huang K, Kikawa T, Minamino A, Nakaya T, Suzuki K, Fukuda Y, Choi K, Itow Y, Suzuki T, Mijakowski P, Frankiewicz K, Hignight J, Imber J, Jung C, Li X, Palomino J, Wilking M, Yanagisawa C, Fukuda D, Ishino H, Kayano T, Kibayashi A, Koshio Y, Mori T, Sakuda M, Xu C, Kuno Y, Tacik R, Kim S, Okazawa H, Choi Y, Nishijima K, Koshiba M, Totsuka Y, Suda Y, Yokoyama M, Bronner C, Hartz M, Martens K, Marti L, Suzuki Y, Vagins M, Martin J, Konaka A, Chen S, Zhang Y, Wilkes R. Measurements of the atmospheric neutrino flux by Super-Kamiokande: Energy spectra, geomagnetic effects, and solar modulation. Int J Clin Exp Med 2016. [DOI: 10.1103/physrevd.94.052001] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Harada A, Toh R, Murakami K, Kiriyama M, Yoshikawa K, Kubo T, Miwa K, Irino Y, Mori K, Tanaka N, Ishida T, Hirata K. A potential role of cholesterol uptake capacity, a new measure for high-density lipoprotein functionality, in coronary risk stratification. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ikezoe J, Johkoh T, Takeuchi N, Ishida T, Morimoto S, Kitamura I, Ohshima M, Kozuka T. CT Findings of Endobronchial Metastasis. Acta Radiol 2016. [DOI: 10.1177/028418519103200604] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
One hundred and sixty-one patients with pulmonary metastases were studied with CT. Six of them proved to have endobronchial (intraluminal) metastatic lesions by bronchoscopy. Retrospective analysis of the CT studies showed obstruction and/or narrowing of the bronchi in 5 cases while no lesion was observed in one patient. Although CT can not always demonstrate intraluminal lesions, it should be performed when an endobronchial metastasis from extrathoracic malignancy is seen by bronchoscopy because it will show hilar or mediastinal lymphadenopathy, or single or multiple pulmonary metastases other than the endobronchial lesion.
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Wakahara C, Morita Y, Tanaka S, Hoshi N, Kawara F, Kibi M, Ishida T, Man-I M, Fujita T, Toyonaga T. Optimization of steroid injection intervals for prevention of stricture after esophageal endoscopic submucosal dissection: A randomized controlled trial. Acta Gastroenterol Belg 2016; 79:315-320. [PMID: 27821027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BACKGROUND Esophageal endoscopic submucosal dissection enables en bloc resection of large superficial esophageal cancer; however, this procedure may induce severe stricture. Intralesional steroid injection is an effective treatment for prevention of stricture after endoscopic resection; however, there have been no studies assessing the duration of such treatment. The aim of this study was to reduce treatment duration and to evaluate the effectiveness of weekly and biweekly steroid injections in preventing esophageal stricture after endoscopic resection. PATIENTS METHOD We performed a randomized controlled trial comparing patients receiving weekly or biweekly intralesional triamcinolone injections. Patients with a mucosal defect greater than 75% (3/4) of the luminal circumference after esophageal endoscopic submucosal dissection for superficial esophageal cancers were enrolled. The primary endpoint was the duration of steroid injection treatment. RESULTS The median duration of treatment was 37.0 days in the weekly group and 34.2 days in the biweekly group (P = 0.059). Among patients with a mucosal defect larger than 50 mm, there was a significant difference in the median duration of treatment between the weekly and biweekly groups (42.5 days vs 29.0 days, P = 0.013). CONCLUSION Biweekly steroid injection of triamcinolone reduces treatment duration, particularly in those with mucosal defects larger than 50 mm. (Acta gastro-enterol. belg., 2016, 79, 315-320).
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Abstract
We have designed a new type of applicator for inductive heating which consists of a one-turn, square, column-like coil, through which RF current flows. The material to be heated is placed alongside one of the external sides of the coil. The depth of penetration from an applicator with a height of 20 cm, width of 20 cm, depth of 60 cm was calculated to be 11.7 cm. However, in experiments using a muscle-equivalent agar phantom 60 cm X 60 cm X 60 cm, the penetration depth proved to be 9.6 cm; but in another experiment using a smaller phantom 20 cm X 40 cm X 60 cm, the penetration depth was 6.3 cm. This means that the depth of penetration depends not only on the size of the applicator but also on the shape of the material heated. Our study clearly showed that this applicator produces much less heat in the fat layer than in the muscle layer and should be an inductive applicator suitable for deep heating cancer therapy.
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Abe K, Andreopoulos C, Antonova M, Aoki S, Ariga A, Assylbekov S, Autiero D, Barbi M, Barker GJ, Barr G, Bartet-Friburg P, Batkiewicz M, Bay F, Berardi V, Berkman S, Bhadra S, Blondel A, Bolognesi S, Bordoni S, Boyd SB, Brailsford D, Bravar A, Bronner C, Buizza Avanzini M, Calland RG, Cao S, Caravaca Rodríguez J, Cartwright SL, Castillo R, Catanesi MG, Cervera A, Cherdack D, Chikuma N, Christodoulou G, Clifton A, Coleman J, Collazuol G, Cremonesi L, Dabrowska A, De Rosa G, Dealtry T, Denner PF, Dennis SR, Densham C, Dewhurst D, Di Lodovico F, Di Luise S, Dolan S, Drapier O, Duffy KE, Dumarchez J, Dytman S, Dziewiecki M, Emery-Schrenk S, Ereditato A, Feusels T, Finch AJ, Fiorentini GA, Friend M, Fujii Y, Fukuda D, Fukuda Y, Furmanski AP, Galymov V, Garcia A, Giffin SG, Giganti C, Gizzarelli F, Gonin M, Grant N, Hadley DR, Haegel L, Haigh MD, Hamilton P, Hansen D, Hara T, Hartz M, Hasegawa T, Hastings NC, Hayashino T, Hayato Y, Helmer RL, Hierholzer M, Hillairet A, Himmel A, Hiraki T, Hirota S, Hogan M, Holeczek J, Horikawa S, Hosomi F, Huang K, Ichikawa AK, Ieki K, Ikeda M, Imber J, Insler J, Intonti RA, Irvine TJ, Ishida T, Ishii T, Iwai E, Iwamoto K, Izmaylov A, Jacob A, Jamieson B, Jiang M, Johnson S, Jo JH, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Karlen D, Karpikov I, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kim H, Kim J, King S, Kisiel J, Knight A, Knox A, Kobayashi T, Koch L, Koga T, Konaka A, Kondo K, Kopylov A, Kormos LL, Korzenev A, Koshio Y, Kropp W, Kudenko Y, Kurjata R, Kutter T, Lagoda J, Lamont I, Larkin E, Laveder M, Lawe M, Lazos M, Lindner T, Liptak ZJ, Litchfield RP, Li X, Longhin A, Lopez JP, Ludovici L, Lu X, Magaletti L, Mahn K, Malek M, Manly S, Marino AD, Marteau J, Martin JF, Martins P, Martynenko S, Maruyama T, Matveev V, Mavrokoridis K, Ma WY, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Mefodiev A, Mezzetto M, Mijakowski P, Minamino A, Mineev O, Mine S, Missert A, Miura M, Moriyama S, Mueller TA, Murphy S, Myslik J, Nakadaira T, Nakahata M, Nakamura KG, Nakamura K, Nakamura KD, Nakayama S, Nakaya T, Nakayoshi K, Nantais C, Nielsen C, Nirkko M, Nishikawa K, Nishimura Y, Nowak J, O'Keeffe HM, Ohta R, Okumura K, Okusawa T, Oryszczak W, Oser SM, Ovsyannikova T, Owen RA, Oyama Y, Palladino V, Palomino JL, Paolone V, Patel ND, Pavin M, Payne D, Perkin JD, Petrov Y, Pickard L, Pickering L, Pinzon Guerra ES, Pistillo C, Popov B, Posiadala-Zezula M, Poutissou JM, Poutissou R, Przewlocki P, Quilain B, Radicioni E, Ratoff PN, Ravonel M, Rayner MAM, Redij A, Reinherz-Aronis E, Riccio C, Rojas P, Rondio E, Roth S, Rubbia A, Rychter A, Sacco R, Sakashita K, Sánchez F, Sato F, Scantamburlo E, Scholberg K, Schoppmann S, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, Shah R, Shaikhiev A, Shaker F, Shaw D, Shiozawa M, Shirahige T, Short S, Smy M, Sobczyk JT, Sorel M, Southwell L, Stamoulis P, Steinmann J, Stewart T, Suda Y, Suvorov S, Suzuki A, Suzuki K, Suzuki SY, Suzuki Y, Tacik R, Tada M, Takahashi S, Takeda A, Takeuchi Y, Tanaka HK, Tanaka HA, Terhorst D, Terri R, Thakore T, Thompson LF, Tobayama S, Toki W, Tomura T, Touramanis C, Tsukamoto T, Tzanov M, Uchida Y, Vacheret A, Vagins M, Vallari Z, Vasseur G, Wachala T, Wakamatsu K, Walter CW, Wark D, Warzycha W, Wascko MO, Weber A, Wendell R, Wilkes RJ, Wilking MJ, Wilkinson C, Wilson JR, Wilson RJ, Yamada Y, Yamamoto K, Yamamoto M, Yanagisawa C, Yano T, Yen S, Yershov N, Yokoyama M, Yoo J, Yoshida K, Yuan T, Yu M, Zalewska A, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman ED, Zito M, Żmuda J. Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam. PHYSICAL REVIEW LETTERS 2016; 116:181801. [PMID: 27203315 DOI: 10.1103/physrevlett.116.181801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Indexed: 06/05/2023]
Abstract
T2K reports its first measurements of the parameters governing the disappearance of ν[over ¯]_{μ} in an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic ν[over ¯]_{μ} beam, produced with a peak energy of 0.6 GeV at J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the ν[over ¯]_{μ} survival probability is expected to be minimal. Using a data set corresponding to 4.01×10^{20} protons on target, 34 fully contained μ-like events were observed. The best-fit oscillation parameters are sin^{2}(θ[over ¯]_{23})=0.45 and |Δm[over ¯]_{32}^{2}|=2.51×10^{-3} eV^{2} with 68% confidence intervals of 0.38-0.64 and 2.26-2.80×10^{-3} eV^{2}, respectively. These results are in agreement with existing antineutrino parameter measurements and also with the ν_{μ} disappearance parameters measured by T2K.
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Takahashi Y, Furukawa Y, Ishida T, Yamada S. Site-selective nanoscale-polymerization of pyrrole on gold nanoparticles via plasmon induced charge separation. NANOSCALE 2016; 8:8520-8524. [PMID: 27067380 DOI: 10.1039/c6nr01531j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We proposed a nanoscale oxidative polymerization method which enables site-selective deposition on the surface of gold nanoparticles (AuNPs) combined with TiO2 by using plasmon induced charge separation (PICS) under visible-to-near infrared (IR) light irradiation. The method also revealed that the anodic site of PICS was located at the surface of AuNPs.
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Niikura N, Tomotaki A, Miyata H, Iwamoto T, Kawai M, Anan K, Hayashi N, Aogi K, Ishida T, Masuoka H, Iijima K, Masuda S, Tsugawa K, Kinoshita T, Nakamura S, Tokuda Y. Changes in tumor expression of HER2 and hormone receptors status after neoadjuvant chemotherapy in 21 755 patients from the Japanese breast cancer registry. Ann Oncol 2016; 27:480-7. [DOI: 10.1093/annonc/mdv611] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 11/28/2015] [Indexed: 12/17/2022] Open
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Narita T, Ri M, Masaki A, Mori F, Ito A, Kusumoto S, Ishida T, Komatsu H, Iida S. Lower expression of activating transcription factors 3 and 4 correlates with shorter progression-free survival in multiple myeloma patients receiving bortezomib plus dexamethasone therapy. Blood Cancer J 2015; 5:e373. [PMID: 26636288 PMCID: PMC4735074 DOI: 10.1038/bcj.2015.98] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 09/18/2015] [Accepted: 10/13/2015] [Indexed: 11/13/2022] Open
Abstract
Bortezomib (BTZ), a proteasome inhibitor, is widely used in the treatment of multiple myeloma (MM), but a fraction of patients respond poorly to this agent. To identify factors predicting the duration of progression-free survival (PFS) of MM patients on BTZ treatment, the expression of proteasome and endoplasmic reticulum (ER) stress-related genes was quantified in primary samples from patients receiving a combination of BTZ and dexamethasone (BD). Fifty-six MM patients were stratified into a group with PFS<6 months (n=33) and a second group with PFS⩾6 months (n=23). Of the 15 genes analyzed, the expression of activating transcription factor 3 (ATF3) and ATF4 was significantly lower in patients with shorter PFS (P=0.0157 and P=0.0085, respectively). Chromatin immunoprecipitation analysis showed that these ATFs bind each other and transactivate genes encoding the pro-apoptotic transcription factors, CHOP and Noxa, which promote ER stress-associated apoptosis. When either ATF3 or ATF4 expression was silenced, MM cells partially lost sensitivity to BTZ treatment. This was accompanied by lower levels of Noxa, CHOP and DR5. Thus low basal expression of ATF3 and ATF4 may attenuate BTZ-induced apoptosis. Hence, ATF3 and ATF4 could potentially be used as biomarkers to predict efficacy of BD therapy in patients with MM.
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Matsumoto Y, Uchimura N, Ishida T, Toyomasu K, Kushino N, Mori M, Morimatsu Y, Hoshiko M, Ishitake T. Suicidal feelings are related to sleep phase, sleep quality, and sleep quantity: A study on the relationship between sleep and suicide prevention by using 3DSS (3 Dimensional Sleep Scale). Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Satoh J, Tabunoki H, Ishida T, Saito Y, Arima K. Accumulation of a repulsive axonal guidance molecule RGMa in amyloid plaques: a possible hallmark of regenerative failure in Alzheimer's disease brains. Neuropathol Appl Neurobiol 2015; 39:109-20. [PMID: 22582881 DOI: 10.1111/j.1365-2990.2012.01281.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
AIMS RGMa is a repulsive guidance molecule that induces the collapse of axonal growth cones by interacting with the receptor neogenin in the central nervous system during development. It remains unknown whether RGMa plays a role in the neurodegenerative process of Alzheimer's disease (AD). We hypothesize that RGMa, if it is concentrated on amyloid plaques, might contribute to a regenerative failure of degenerating axons in AD brains. METHODS By immunohistochemistry, we studied RGMa and neogenin (NEO1) expression in the frontal cortex and the hippocampus of 6 AD and 12 control cases. The levels of RGMa expression were determined by qRT-PCR and Western blot in cultured human astrocytes following exposure to cytokines and amyloid beta (Aβ) peptides. RESULTS In AD brains, an intense RGMa immunoreactivity was identified on amyloid plaques and in the glial scar. In the control brains, the glial scar and vascular foot processes of astrocytes expressed RGMa immunoreactivity, while oligodendrocytes and microglia were negative for RGMa. In AD brains, a small subset of amyloid plaques expressed a weak NEO1 immunoreactivity, while some reactive astrocytes in both AD and control brains showed an intense NEO1 immunoreactivity. In human astrocytes, transforming growth factor beta-1 (TGFβ1 ), Aβ 1-40 or Aβ 1-42 markedly elevated the levels of RGMa, and TGFβ1 also increased its own levels. Coimmunoprecipitation analysis validated the molecular interaction between RGMa and the C-terminal fragment β of amyloid beta precursor protein (APP). Furthermore, recombinant RGMa protein interacted with amyloid plaques in situ. CONCLUSIONS RGMa, produced by TGFβ-activated astrocytes and accumulated in amyloid plaques and the glial scar, could contribute to the regenerative failure of degenerating axons in AD brains.
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Takhistov V, Abe K, Haga Y, Hayato Y, Ikeda M, Iyogi K, Kameda J, Kishimoto Y, Miura M, Moriyama S, Nakahata M, Nakajima T, Nakano Y, Nakayama S, Orii A, Sekiya H, Shiozawa M, Takeda A, Tanaka H, Tomura T, Wendell RA, Irvine T, Kajita T, Kametani I, Kaneyuki K, Nishimura Y, Richard E, Okumura K, Labarga L, Fernandez P, Gustafson J, Kachulis C, Kearns E, Raaf JL, Stone JL, Sulak LR, Berkman S, Nantais CM, Tanaka HA, Tobayama S, Goldhaber M, Carminati G, Kropp WR, Mine S, Weatherly P, Renshaw A, Smy MB, Sobel HW, Ganezer KS, Hartfiel BL, Hill J, Hong N, Kim JY, Lim IT, Himmel A, Li Z, Scholberg K, Walter CW, Wongjirad T, Ishizuka T, Tasaka S, Jang JS, Learned JG, Matsuno S, Smith SN, Friend M, Hasegawa T, Ishida T, Ishii T, Kobayashi T, Nakadaira T, Nakamura K, Oyama Y, Sakashita K, Sekiguchi T, Tsukamoto T, Suzuki AT, Takeuchi Y, Yano T, Hirota S, Huang K, Ieki K, Kikawa T, Minamino A, Nakaya T, Suzuki K, Takahashi S, Fukuda Y, Choi K, Itow Y, Suzuki T, Mijakowski P, Frankiewicz K, Hignight J, Imber J, Jung CK, Li X, Palomino JL, Wilking MJ, Yanagisawa C, Ishino H, Kayano T, Kibayashi A, Koshio Y, Mori T, Sakuda M, Kuno Y, Tacik R, Kim SB, Okazawa H, Choi Y, Nishijima K, Koshiba M, Suda Y, Totsuka Y, Yokoyama M, Bronner C, Hartz M, Martens K, Marti L, Suzuki Y, Vagins MR, Martin JF, de Perio P, Konaka A, Chen S, Zhang Y, Wilkes RJ. Search for Nucleon and Dinucleon Decays with an Invisible Particle and a Charged Lepton in the Final State at the Super-Kamiokande Experiment. PHYSICAL REVIEW LETTERS 2015; 115:121803. [PMID: 26430987 DOI: 10.1103/physrevlett.115.121803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Indexed: 06/05/2023]
Abstract
Search results for nucleon decays p→e^{+}X, p→μ^{+}X, n→νγ (where X is an invisible, massless particle) as well as dinucleon decays np→e^{+}ν, np→μ^{+}ν, and np→τ^{+}ν in the Super-Kamiokande experiment are presented. Using single-ring data from an exposure of 273.4 kton·yr, a search for these decays yields a result consistent with no signal. Accordingly, lower limits on the partial lifetimes of τ_{p→e^{+}X}>7.9×10^{32} yr, τ_{p→μ^{+}X}>4.1×10^{32} yr, τ_{n→νγ}>5.5×10^{32} yr, τ_{np→e^{+}ν}>2.6×10^{32} yr, τ_{np→μ^{+}ν}>2.2×10^{32} yr, and τ_{np→τ^{+}ν}>2.9×10^{31} yr at a 90% confidence level are obtained. Some of these searches are novel.
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Naito T, Kubono N, Ishida T, Deguchi S, Sugihara M, Itoh H, Kanayama N, Kawakami J. Relationship Between Amlodipine Pharmacokinetics And Cyp3a Activity In Lactating Women With Pregnancy-Induced Hypertension. Clin Ther 2015. [DOI: 10.1016/j.clinthera.2015.05.107] [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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Abe K, Adam J, Aihara H, Andreopoulos C, Aoki S, Ariga A, Assylbekov S, Autiero D, Barbi M, Barker G, Barr G, Bartet-Friburg P, Bass M, Batkiewicz M, Bay F, Berardi V, Berger B, Berkman S, Bhadra S, Blaszczyk F, Blondel A, Bolognesi S, Bordoni S, Boyd S, Brailsford D, Bravar A, Bronner C, Buchanan N, Calland R, Caravaca Rodríguez J, Cartwright S, Castillo R, Catanesi M, Cervera A, Cherdack D, Chikuma N, Christodoulou G, Clifton A, Coleman J, Coleman S, Collazuol G, Connolly K, Cremonesi L, Dabrowska A, Das R, Davis S, de Perio P, De Rosa G, Dealtry T, Dennis S, Densham C, Dewhurst D, Di Lodovico F, Di Luise S, Dolan S, Drapier O, Duffy K, Dumarchez J, Dytman S, Dziewiecki M, Emery-Schrenk S, Ereditato A, Escudero L, Feusels T, Finch A, Fiorentini G, Friend M, Fujii Y, Fukuda Y, Furmanski A, Galymov V, Garcia A, Giffin S, Giganti C, Gilje K, Goeldi D, Golan T, Gonin M, Grant N, Gudin D, Hadley D, Haegel L, Haesler A, Haigh M, Hamilton P, Hansen D, Hara T, Hartz M, Hasegawa T, Hastings N, Hayashino T, Hayato Y, Helmer R, Hierholzer M, Hignight J, Hillairet A, Himmel A, Hiraki T, Hirota S, Holeczek J, Horikawa S, Hosomi F, Huang K, Ichikawa A, Ieki K, Ieva M, Ikeda M, Imber J, Insler J, Irvine T, Ishida T, Ishii T, Iwai E, Iwamoto K, Iyogi K, Izmaylov A, Jacob A, Jamieson B, Jiang M, Johnson S, Jo J, Jonsson P, Jung C, Kabirnezhad M, Kaboth A, Kajita T, Kakuno H, Kameda J, Kanazawa Y, Karlen D, Karpikov I, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kilinski A, Kim J, King S, Kisiel J, Kitching P, Kobayashi T, Koch L, Koga T, Kolaceke A, Konaka A, Kopylov A, Kormos L, Korzenev A, Koshio Y, Kropp W, Kubo H, Kudenko Y, Kurjata R, Kutter T, Lagoda J, Lamont I, Larkin E, Laveder M, Lawe M, Lazos M, Lindner T, Lister C, Litchfield R, Longhin A, Lopez J, Ludovici L, Magaletti L, Mahn K, Malek M, Manly S, Marino A, Marteau J, Martin J, Martins P, Martynenko S, Maruyama T, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland K, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Mijakowski P, Miller C, Minamino A, Mineev O, Mine S, Missert A, Miura M, Moriyama S, Mueller T, Murakami A, Murdoch M, Murphy S, Myslik J, Nakadaira T, Nakahata M, Nakamura K, Nakamura K, Nakayama S, Nakaya T, Nakayoshi K, Nantais C, Nielsen C, Nirkko M, Nishikawa K, Nishimura Y, Nowak J, O’Keeffe H, Ohta R, Okumura K, Okusawa T, Oryszczak W, Oser S, Ovsyannikova T, Owen R, Oyama Y, Palladino V, Palomino J, Paolone V, Payne D, Perevozchikov O, Perkin J, Petrov Y, Pickard L, Pinzon Guerra E, Pistillo C, Plonski P, Poplawska E, Popov B, Posiadala-Zezula M, Poutissou JM, Poutissou R, Przewlocki P, Quilain B, Radicioni E, Ratoff P, Ravonel M, Rayner M, Redij A, Reeves M, Reinherz-Aronis E, Riccio C, Rodrigues P, Rojas P, Rondio E, Roth S, Rubbia A, Ruterbories D, Rychter A, Sacco R, Sakashita K, Sánchez F, Sato F, Scantamburlo E, Scholberg K, Schoppmann S, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, Shah R, Shaikhiev A, Shaker F, Shaw D, Shiozawa M, Short S, Shustrov Y, Sinclair P, Smith B, Smy M, Sobczyk J, Sobel H, Sorel M, Southwell L, Stamoulis P, Steinmann J, Suda Y, Suzuki A, Suzuki K, Suzuki S, Suzuki Y, Tacik R, Tada M, Takahashi S, Takeda A, Takeuchi Y, Tanaka H, Tanaka H, Tanaka M, Terhorst D, Terri R, Thompson L, Thorley A, Tobayama S, Toki W, Tomura T, Touramanis C, Tsukamoto T, Tzanov M, Uchida Y, Vacheret A, Vagins M, Vasseur G, Wachala T, Wakamatsu K, Walter C, Wark D, Warzycha W, Wascko M, Weber A, Wendell R, Wilkes R, Wilking M, Wilkinson C, Williamson Z, Wilson J, Wilson R, Wongjirad T, Yamada Y, Yamamoto K, Yanagisawa C, Yano T, Yen S, Yershov N, Yokoyama M, Yoo J, Yoshida K, Yuan T, Yu M, Zalewska A, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman E, Zito M, Żmuda J. Measurement of the electron neutrino charged-current interaction rate on water with the T2K ND280π0detector. Int J Clin Exp Med 2015. [DOI: 10.1103/physrevd.91.112010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kumagai S, Ishida T, Tachibana H, Ito Y, Ito A, Hashimoto T. Impact of bacterial coinfection on clinical outcomes in pneumococcal pneumonia. Eur J Clin Microbiol Infect Dis 2015; 34:1839-47. [PMID: 26059041 DOI: 10.1007/s10096-015-2421-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 05/02/2015] [Indexed: 11/30/2022]
Abstract
The aim of this study was to investigate the influence of bacterial coinfection on patients with pneumococcal pneumonia. We retrospectively analyzed the incidence, clinical features, microbial distributions, and outcomes of patients with bacterial coinfection in a cohort of 433 hospitalized patients with pneumococcal pneumonia. Eighty-five patients (19.6 %) were diagnosed with bacterial coinfection; the most frequent pathogens were Haemophilus influenzae (25 patients, 33.3 %), methicillin-susceptible Staphylococcus aureus (MSSA) (15 patients, 20.0 %), and Moraxella catarrhalis (13 patients, 17.3 %). The CURB-65 score and pneumonia severity index (PSI) were significantly higher in patients with bacterial coinfection (both P < 0.001). In addition, the proportion of patients with bacterial coinfection who met the Infectious Disease Society of America (IDSA)/American Thoracic Society (ATS) severe pneumonia criteria was significantly higher (P < 0.001). Multivariate logistic regression analysis identified three risk factors for bacterial coinfection in patients with pneumococcal pneumonia: alcoholism (odds ratio [OR], 5.12; 95 % confidence interval (95 % CI), 1.60-16.4; P = 0.006), hospitalization for 2 days or more within 90 days preceding admission (OR, 2.02; 95 % CI, 1.03-3.98; P = 0.041), and residence in a nursing home or extended care facility (OR, 3.22; 95 % CI, 1.48-6.97; P = 0.003). Multivariate analysis for 30-day mortality showed that bacterial coinfection was a significant adverse prognostic factor (OR, 2.50; 95 % CI, 1.13-5.53; P = 0.023), independent of IDSA/ATS severe pneumonia, PSI, or healthcare-associated pneumonia. In conclusion, bacterial coinfection may have an adverse impact on severity and outcomes of pneumococcal pneumonia.
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Abe K, Adam J, Aihara H, Andreopoulos C, Aoki S, Ariga A, Assylbekov S, Autiero D, Barbi M, Barker G, Barr G, Bartet-Friburg P, Bass M, Batkiewicz M, Bay F, Berardi V, Berger B, Berkman S, Bhadra S, Blaszczyk F, Blondel A, Bolognesi S, Bordoni S, Boyd S, Brailsford D, Bravar A, Bronner C, Buchanan N, Calland R, Caravaca Rodríguez J, Cartwright S, Castillo R, Catanesi M, Cervera A, Cherdack D, Chikuma N, Christodoulou G, Clifton A, Coleman J, Coleman S, Collazuol G, Connolly K, Cremonesi L, Dabrowska A, Danko I, Das R, Davis S, de Perio P, De Rosa G, Dealtry T, Dennis S, Densham C, Dewhurst D, Di Lodovico F, Di Luise S, Dolan S, Drapier O, Duffy K, Dumarchez J, Dytman S, Dziewiecki M, Emery-Schrenk S, Ereditato A, Escudero L, Ferchichi C, Feusels T, Finch A, Fiorentini G, Friend M, Fujii Y, Fukuda Y, Furmanski A, Galymov V, Garcia A, Giffin S, Giganti C, Gilje K, Goeldi D, Golan T, Gonin M, Grant N, Gudin D, Hadley D, Haegel L, Haesler A, Haigh M, Hamilton P, Hansen D, Hara T, Hartz M, Hasegawa T, Hastings N, Hayashino T, Hayato Y, Hearty C, Helmer R, Hierholzer M, Hignight J, Hillairet A, Himmel A, Hiraki T, Hirota S, Holeczek J, Horikawa S, Hosomi F, Huang K, Ichikawa A, Ieki K, Ieva M, Ikeda M, Imber J, Insler J, Irvine T, Ishida T, Ishii T, Iwai E, Iwamoto K, Iyogi K, Izmaylov A, Jacob A, Jamieson B, Jiang M, Johnson S, Jo J, Jonsson P, Jung C, Kabirnezhad M, Kaboth A, Kajita T, Kakuno H, Kameda J, Kanazawa Y, Karlen D, Karpikov I, Katori T, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kilinski A, Kim J, King S, Kisiel J, Kitching P, Kobayashi T, Koch L, Koga T, Kolaceke A, Konaka A, Kopylov A, Kormos L, Korzenev A, Koshio Y, Kropp W, Kubo H, Kudenko Y, Kurjata R, Kutter T, Lagoda J, Lamont I, Larkin E, Laveder M, Lawe M, Lazos M, Lindner T, Lister C, Litchfield R, Longhin A, Lopez J, Ludovici L, Magaletti L, Mahn K, Malek M, Manly S, Marino A, Marteau J, Martin J, Martins P, Martynenko S, Maruyama T, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland K, McGrew C, Mefodiev A, Metelko C, Mezzetto M, Mijakowski P, Miller C, Minamino A, Mineev O, Missert A, Miura M, Moriyama S, Mueller T, Murakami A, Murdoch M, Murphy S, Myslik J, Nakadaira T, Nakahata M, Nakamura K, Nakamura K, Nakayama S, Nakaya T, Nakayoshi K, Nantais C, Nielsen C, Nirkko M, Nishikawa K, Nishimura Y, Nowak J, O’Keeffe H, Ohta R, Okumura K, Okusawa T, Oryszczak W, Oser S, Ovsyannikova T, Owen R, Oyama Y, Palladino V, Palomino J, Paolone V, Payne D, Perevozchikov O, Perkin J, Petrov Y, Pickard L, Pinzon Guerra E, Pistillo C, Plonski P, Poplawska E, Popov B, Posiadala-Zezula M, Poutissou JM, Poutissou R, Przewlocki P, Quilain B, Radicioni E, Ratoff P, Ravonel M, Rayner M, Redij A, Reeves M, Reinherz-Aronis E, Riccio C, Rodrigues P, Rojas P, Rondio E, Roth S, Rubbia A, Ruterbories D, Rychter A, Sacco R, Sakashita K, Sánchez F, Sato F, Scantamburlo E, Scholberg K, Schoppmann S, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, Shah R, Shaker F, Shaw D, Shiozawa M, Short S, Shustrov Y, Sinclair P, Smith B, Smy M, Sobczyk J, Sobel H, Sorel M, Southwell L, Stamoulis P, Steinmann J, Still B, Suda Y, Suzuki A, Suzuki K, Suzuki S, Suzuki Y, Tacik R, Tada M, Takahashi S, Takeda A, Takeuchi Y, Tanaka H, Tanaka H, Tanaka M, Terhorst D, Terri R, Thompson L, Thorley A, Tobayama S, Toki W, Tomura T, Totsuka Y, Touramanis C, Tsukamoto T, Tzanov M, Uchida Y, Vacheret A, Vagins M, Vasseur G, Wachala T, Wakamatsu K, Walter C, Wark D, Warzycha W, Wascko M, Weber A, Wendell R, Wilkes R, Wilking M, Wilkinson C, Williamson Z, Wilson J, Wilson R, Wongjirad T, Yamada Y, Yamamoto K, Yanagisawa C, Yano T, Yen S, Yershov N, Yokoyama M, Yoo J, Yoshida K, Yuan T, Yu M, Zalewska A, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman E, Zito M, Żmuda J. Measurement of theνμcharged current quasielastic cross section on carbon with the T2K on-axis neutrino beam. Int J Clin Exp Med 2015. [DOI: 10.1103/physrevd.91.112002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kotani T, Takeuchi T, Ishida T, Masutani R, Isoda K, Hata K, Makino S, Hanafusa T. SAT0479 Increased Serum Light Levels Correlate with Disease Progression and Severity of Interstitial Pneumonia in Patients with Dermatomyositis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ishida T, Shoda T, Takeuchi T, Fujiki Y, Hata K, Yoshida S, Kotani T, Makino S, Hanafusa T. FRI0490 Clinical Characteristics of Combined Pulmonary Fibrosis and Emphysema in Patients with Connective Tissue Disease. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gustafson J, Abe K, Haga Y, Hayato Y, Ikeda M, Iyogi K, Kameda J, Kishimoto Y, Miura M, Moriyama S, Nakahata M, Nakajima T, Nakano Y, Nakayama S, Orii A, Sekiya H, Shiozawa M, Takeda A, Tanaka H, Tomura T, Wendell R, Irvine T, Kajita T, Kametani I, Kaneyuki K, Nishimura Y, Richard E, Okumura K, Labarga L, Fernandez P, Berkman S, Tanaka H, Tobayama S, Kearns E, Raaf J, Stone J, Sulak L, Goldhaber M, Carminati G, Kropp W, Mine S, Weatherly P, Renshaw A, Smy M, Sobel H, Takhistov V, Ganezer K, Hartfiel B, Hill J, Hong N, Kim J, Lim I, Akiri T, Himmel A, Scholberg K, Walter C, Wongjirad T, Ishizuka T, Tasaka S, Jang J, Learned J, Matsuno S, Smith S, Hasegawa T, Ishida T, Ishii T, Kobayashi T, Nakadaira T, Nakamura K, Oyama Y, Sakashita K, Sekiguchi T, Tsukamoto T, Suzuki A, Takeuchi Y, Yano T, Hirota S, Huang K, Ieki K, Kikawa T, Minamino A, Nakaya T, Suzuki K, Takahashi S, Fukuda Y, Choi K, Itow Y, Mitsuka G, Suzuki T, Mijakowski P, Hignight J, Imber J, Jung C, Palomino J, Yanagisawa C, Ishino H, Kayano T, Kibayashi A, Koshio Y, Mori T, Sakuda M, Kuno Y, Tacik R, Kim S, Okazawa H, Choi Y, Nishijima K, Koshiba M, Suda Y, Totsuka Y, Yokoyama M, Bronner C, Martens K, Marti L, Suzuki Y, Vagins M, Martin J, de Perio P, Konaka A, Wilking M, Chen S, Zhang Y, Wilkes R. Search for dinucleon decay into pions at Super-Kamiokande. Int J Clin Exp Med 2015. [DOI: 10.1103/physrevd.91.072009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Koike Y, Takeichi K, Ishida T, Yamaguchi M, Ohtsu S. Measurement of mesopharyngeal pressure in patients with obstructive sleep apnea. Adv Otorhinolaryngol 2015; 47:260-6. [PMID: 1456144 DOI: 10.1159/000421754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Abe K, Hayato Y, Iida T, Ishihara K, Kameda J, Koshio Y, Minamino A, Mitsuda C, Miura M, Moriyama S, Nakahata M, Obayashi Y, Ogawa H, Sekiya H, Shiozawa M, Suzuki Y, Takeda A, Takeuchi Y, Ueshima K, Watanabe H, Higuchi I, Ishihara C, Ishitsuka M, Kajita T, Kaneyuki K, Mitsuka G, Nakayama S, Nishino H, Okumura K, Saji C, Takenaga Y, Clark S, Desai S, Dufour F, Herfurth A, Kearns E, Likhoded S, Litos M, Raaf J, Stone J, Sulak L, Wang W, Goldhaber M, Casper D, Cravens J, Dunmore J, Griskevich J, Kropp W, Liu D, Mine S, Regis C, Smy M, Sobel H, Vagins M, Ganezer K, Hartfiel B, Hill J, Keig W, Jang J, Jeoung I, Kim J, Lim I, Scholberg K, Tanimoto N, Walter C, Wendell R, Ellsworth R, Tasaka S, Guillian G, Learned J, Matsuno S, Messier M, Ichikawa A, Ishida T, Ishii T, Iwashita T, Kobayashi T, Nakadaira T, Nakamura K, Nishikawa K, Nitta K, Oyama Y, Suzuki A, Hasegawa M, Maesaka H, Nakaya T, Sasaki T, Sato H, Tanaka H, Yamamoto S, Yokoyama M, Haines T, Dazeley S, Hatakeyama S, Svoboda R, Sullivan G, Gran R, Habig A, Fukuda Y, Itow Y, Koike T, Jung C, Kato T, Kobayashi K, McGrew C, Sarrat A, Terri R, Yanagisawa C, Tamura N, Ikeda M, Sakuda M, Kuno Y, Yoshida M, Kim S, Yang B, Ishizuka T, Okazawa H, Choi Y, Seo H, Gando Y, Hasegawa T, Inoue K, Ishii H, Nishijima K, Ishino H, Watanabe Y, Koshiba M, Totsuka Y, Chen S, Deng Z, Liu Y, Kielczewska D, Berns H, Shiraishi K, Thrane E, Washburn K, Wilkes R. Search forn−n¯oscillation in Super-Kamiokande. Int J Clin Exp Med 2015. [DOI: 10.1103/physrevd.91.072006] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Choi K, Abe K, Haga Y, Hayato Y, Iyogi K, Kameda J, Kishimoto Y, Miura M, Moriyama S, Nakahata M, Nakano Y, Nakayama S, Sekiya H, Shiozawa M, Suzuki Y, Takeda A, Tomura T, Wendell RA, Irvine T, Kajita T, Kametani I, Kaneyuki K, Lee KP, Nishimura Y, Okumura K, McLachlan T, Labarga L, Kearns E, Raaf JL, Stone JL, Sulak LR, Berkman S, Tanaka HA, Tobayama S, Goldhaber M, Carminati G, Kropp WR, Mine S, Renshaw A, Smy MB, Sobel HW, Ganezer KS, Hill J, Hong N, Kim JY, Lim IT, Akiri T, Himmel A, Scholberg K, Walter CW, Wongjirad T, Ishizuka T, Tasaka S, Jang JS, Learned JG, Matsuno S, Smith SN, Hasegawa T, Ishida T, Ishii T, Kobayashi T, Nakadaira T, Nakamura K, Oyama Y, Sakashita K, Sekiguchi T, Tsukamoto T, Suzuki AT, Takeuchi Y, Bronner C, Hirota S, Huang K, Ieki K, Ikeda M, Kikawa T, Minamino A, Nakaya T, Suzuki K, Takahashi S, Fukuda Y, Itow Y, Mitsuka G, Mijakowski P, Hignight J, Imber J, Jung CK, Yanagisawa C, Ishino H, Kibayashi A, Koshio Y, Mori T, Sakuda M, Yano T, Kuno Y, Tacik R, Kim SB, Okazawa H, Choi Y, Nishijima K, Koshiba M, Totsuka Y, Yokoyama M, Martens K, Marti L, Vagins MR, Martin JF, de Perio P, Konaka A, Wilking MJ, Chen S, Zhang Y, Wilkes RJ. Search for neutrinos from annihilation of captured low-mass dark matter particles in the sun by super-kamiokande. PHYSICAL REVIEW LETTERS 2015; 114:141301. [PMID: 25910107 DOI: 10.1103/physrevlett.114.141301] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Indexed: 06/04/2023]
Abstract
Super-Kamiokande (SK) can search for weakly interacting massive particles (WIMPs) by detecting neutrinos produced from WIMP annihilations occurring inside the Sun. In this analysis, we include neutrino events with interaction vertices in the detector in addition to upward-going muons produced in the surrounding rock. Compared to the previous result, which used the upward-going muons only, the signal acceptances for light (few-GeV/c^{2}-200-GeV/c^{2}) WIMPs are significantly increased. We fit 3903 days of SK data to search for the contribution of neutrinos from WIMP annihilation in the Sun. We found no significant excess over expected atmospheric-neutrino background and the result is interpreted in terms of upper limits on WIMP-nucleon elastic scattering cross sections under different assumptions about the annihilation channel. We set the current best limits on the spin-dependent WIMP-proton cross section for WIMP masses below 200 GeV/c^{2} (at 10 GeV/c^{2}, 1.49×10^{-39} cm^{2} for χχ→bb[over ¯] and 1.31×10^{-40} cm^{2} for χχ→τ^{+}τ^{-} annihilation channels), also ruling out some fraction of WIMP candidates with spin-independent coupling in the few-GeV/c^{2} mass range.
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