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Kitano K, Maeda H. Coherent Amplification of Continuous Laser Field via Superfluorescence. Phys Rev Lett 2024; 132:073201. [PMID: 38427863 DOI: 10.1103/physrevlett.132.073201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 12/15/2023] [Accepted: 01/19/2024] [Indexed: 03/03/2024]
Abstract
Superfluorescence (SF) is collective spontaneous emission wherein radiators spontaneously synchronize, resulting in an intense single-pulse emission. The avalanche radiation of photons is initiated by the first photon emitted into the SF propagation mode. Because this process is stochastic, the absolute phase of the SF changes randomly from shot to shot. We demonstrate that this phase can be controlled by seeding the SF with a resonant continuous-wave (CW) laser. The seed light was weak enough not to cause the stimulated emission but strong enough to inject the first photon into the SF propagation mode prior to injection by the radiators themselves. Cross-correlation measurements between the seeded SF and CW laser revealed that the seed light was coherently amplified by the SF. The amplification factor for the instantaneous intensity was estimated to be 7 orders of magnitude. These results will pave the way for the development of new types of quantum optical amplifiers.
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Affiliation(s)
- K Kitano
- Department of Physical Sciences, Aoyama Gakuin University, Kanagawa 252-5258, Japan
| | - H Maeda
- Department of Physical Sciences, Aoyama Gakuin University, Kanagawa 252-5258, Japan
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Kitano K, Maeda H. Cascade and yoked superfluorescence detected by sum frequency generation spectroscopy. Opt Lett 2023; 48:69-72. [PMID: 36563371 DOI: 10.1364/ol.473200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
We investigated the superfluorescent decay process of dense rubidium atomic vapor in a cell. Using a femtosecond laser pulse, the atoms were excited from the 5S ground state to the 6P state. The 2.73μm and 1.37μm fields were generated on the cascaded decay, 6P → 6S → 5P, which further stimulated the 780 nm forward emission on the 5P → 5S transition. Using sum frequency generation (SFG) spectroscopy, we observed all emission fields and the time delay between them, with sufficient temporal resolution. The experimental results were successfully reproduced using semiclassical simulations.
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Yoshiyasu N, Sato M, Kashiwa K, Fujishiro K, Konoeda C, Kitano K, Nakajima J. Introduction of Thromboelastography (TEG®) Shortens the Hemostatic Time in Lung Transplantation Under Veno-Arterial Extracorporeal Membrane Oxygenation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kitano K, Tomida H, Takei D, Maeda H. Polarization correlation in the superfluorescent decay process. Opt Lett 2021; 46:5055-5058. [PMID: 34598267 DOI: 10.1364/ol.436250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
We investigated the polarization properties of superfluorescence (SF) emitted from dense cesium atomic vapor in a cell. The atoms were excited from the 6S ground to the 8P state using a femtosecond laser pulse. The SF fields generated on the cascaded decay, 8P→8S→7P, mediated the nonlinear optical process. We observed 4.2-µm and 456-nm forward directional emissions generated on the 8S→7P and 7P→6S transitions, respectively. The polarizations of the two fields were correlated in each laser shot, and their directions fluctuated from shot to shot, reflecting the noise that initiated the 4.2-µm emission.
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Yanagiya M, Yoshioka T, Kitano K, Nagayama K, Sato M, Nakajima J. P2.15-04 Impact of Prognostic Nutritional Index on Long-Term Outcomes After Surgery for Pulmonary Metastasis from Colorectal Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Nakao K, Nitadori J, Kitano K, Nagayama K, Shinozaki-Ushiku A, Sato M, Fukayama M, Nakajima J. P2.17-22 Retrospective Analysis of Spread Through Air Spaces and Other Features in Patients with Stage IA Adenocarcinoma by the 8th TNM Classification. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Karasaki T, Kobayashi Y, Shinozaki-Ushiku A, Konoeda C, Kitano K, Nagayama K, Sato M, Hosoi A, Kakimi K, Nakajima J. P2.04-55 Tumor Spread Through Air Spaces Is Associated with the Non-Inflamed Immune Microenvironment in Lung Squamous Cell Carcinoma. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Asplenia may yield an increased risk of fulminant sepsis with various pathogens. Human infection with Campylobacter fetus is rare, but it often presents with non-gastrointestinal tract infection among immunocompromised individuals. A 55-year-old abattoir worker presented with a fever. He had had splenectomy for follicular lymphoma and rituximab maintenance therapy by four months before the presentation. Blood cultures yielded C. fetus, and the administration of meropenem dissolved the bacteremia. Further maintenance therapy was withheld, and no recurrence of infection has been observed for seven years. Asplenia, occupational exposure, and/or rituximab maintenance therapy might have been precipitating factors of this rare infection.
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Affiliation(s)
- Hideyuki Nakazawa
- Division of Hematology, Department of Internal Medicine, Shinshu University School of Medicine, Japan
- Department of Hematology, NHO Matsumoto Medical Center, Japan
| | - Sayaka Nishina
- Division of Hematology, Department of Internal Medicine, Shinshu University School of Medicine, Japan
- Department of Hematology, NHO Matsumoto Medical Center, Japan
| | - Hitoshi Sakai
- Division of Hematology, Department of Internal Medicine, Shinshu University School of Medicine, Japan
- Department of Hematology, NHO Matsumoto Medical Center, Japan
| | - Toshiro Ito
- Department of Hematology, NHO Matsumoto Medical Center, Japan
| | - Fumihiro Ishida
- Division of Hematology, Department of Internal Medicine, Shinshu University School of Medicine, Japan
- Biomedical Laboratory Sciences, Shinshu University School of Medicine, Japan
| | - Kiyoshi Kitano
- Department of Hematology, NHO Matsumoto Medical Center, Japan
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Terada Y, Takahashi T, Nitadori J, Kitano K, Nagayama K, Anraku M, Sato M, Shinozaki-Ushiku A, Morita S, Nakajima J. P3.16-43 Is Sublobar Resection for Stage I Invasive Adenocarcinoma (≤2-cm) Feasible? J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Karasaki T, Kitano K, Nagayama K, Nitadori J, Sato M, Anraku M, Kakimi K, Nakajima J. MA19.05 Difference of Tumor Mutational Burden Is Associated with Distinct Immune Microenviroment in the T Cell-Inflamed Lung Adenocarcinoma. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Nitadori J, Sato M, Kitano K, Nagayama K, Anraku M, Nakajima J. P1.16-45 Thoracoscopic Stapler-Based Complex Segmentectomy Assisted by Virtual Assisted Lung Mapping. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ishida F, Furihata K, Ishida K, Kodaira H, Sup Han K, Da-Zhuang L, Kitano K, Kiyosawa K. The Largest Isoform of Platelet Membrane Glycoprotein Iba Is Commonly Distributed in Eastern Asian Populations. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1650562] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryPlatelet membrane glycoprotein Iba has at least two polymorphisms which affect phenotype. One is the dimorphism at codon 145, and the other is a molecular weight polymorphism due to variable numbers of tandem repeats (TR) in the macroglycopeptide region. These two polymorphisms are in linkage disequilibrium. The frequencies of these polymorphisms differ considerably depending on race, and the largest variant with four TR is almost exclusively present in the Japanese population. We examined the genotypes of HPA-2 and TR polymorphism in three different races from Eastern Asia; the Japanese (n = 103), Korean (n = 101) and Chinese population (n = 177). The gene frequency of HPA-2 differed significantly among these three populations. Among HPA-2b-positive individuals, the A isoform with four TR and B with three TR were present in all three populations and A dominated over B. Individuals homozygous for the A isoform were found in both Japanese and Korean populations. These findings indicate that the largest haplotype is common in the Eastern Asian region.
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Affiliation(s)
- Fumihiro Ishida
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Shounan Hospital, Japan
- Matsumoto, Japan
| | - Kenichi Furihata
- Department of Laboratory Medicine, Shinshu University School of Medicine, Shounan Hospital, Japan
| | - Kimitaka Ishida
- First Department of Surgery, Shinshu University School of Medicine, Shounan Hospital, Japan
| | - Hiroshi Kodaira
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Shounan Hospital, Japan
| | - Kyou Sup Han
- Department of Clinical Pathology, Seoul National University College of Medicine, Seoul, Korea
| | | | - Kiyoshi Kitano
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Shounan Hospital, Japan
| | - Kendo Kiyosawa
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Shounan Hospital, Japan
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Shimodaira S, Ishida F, Ichikawa N, Tahara T, Kato T, Kodaira H, Ito T, Tanaka E, Sodeyama T, Kiyosawa K, Kitano K. Serum Thrombopoietin (c-MpI Ligand) Levels in Patients with Liver Cirrhosis. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1650620] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryTo clarify the role of c-Mpl ligand (thrombopoietin: TPO) in liver cirrhosis (LC), we examined serum TPO levels (sTPO) in patients with LG (N = 44), chronic hepatitis (CH; N = 13) and healthy controls (N = 41) by an enzyme-linked immunosorbent assay. Although platelet counts of all LC patients (89 ± 59 × 109/1; mean ± SD) were lower than those of controls and CH patients, sTPO levels in LC patients (1.23 ± 0.51 fmol/ml) were the same as those in controls (1.22 ± 0.37) and CH patients (1.18 ± 0.36). Platelet counts were significantly higher in splenectomized patients than in unsplenectomized patients, but the sTPO level did not differ between these two groups. In LC patients, the sTPO level was not correlated with the platelet count, but was correlated with prothrombin time, activated partial thromboplastin time, and total bilirubin, indicating that production of TPO in the liver decreases slightly with the development of liver dysfunction. Our findings suggest that production of TPO is maintained in LC patients and their thrombocytopenia is not due to a defect in platelet production.
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Affiliation(s)
- Shigetaka Shimodaira
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Fumihiro Ishida
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Naoaki Ichikawa
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tomoyuki Tahara
- The Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd., Maebashi, Japan
| | - Takashi Kato
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Hiroshi Kodaira
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Toshiro Ito
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Eiji Tanaka
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takeshi Sodeyama
- The Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd., Maebashi, Japan
| | - Kendo Kiyosawa
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Kiyoshi Kitano
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
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Ichikawa N, Ishida F, Shimodaira S, Tahara T, Kato T, Kitano K. Regulation of Serum Thrombopoietin Levels by Platelets and Megakaryocytes in Patients with Aplastic Anaemia and Idiopathic Thrombocytopenic Purpura. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1650545] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryTo clarify the regulatory mechanism of thrombopoietin (TPO, c-Mpl ligand) in chronic thrombocytopenic conditions, we determined TPO levels in the sera of patients with aplastic anaemia (AA; n = 26) and idiopathic thrombocytopenic purpura (ITP; n = 32) by an enzyme-linked immunosorbent assay. Despite a similarity in platelet counts, serum TPO levels in the AA group were markedly higher than those in the ITP group: 20.41 ± 9.71 f mol/ml (mean ± SD) and 1.66 ± 0.55 f mol/ml, respectively, both of which were significantly elevated compared to normal subjects (n = 41; 1.22 ± 0.37). In both groups, serum TPO level showed an inverse correlation with the platelet count. We determined the megakaryocyte volume using bone marrow clot section and found that it was markedly small in the AA group; while in the ITP group it was augmented with a correlation to serum TPO level. Our findings suggest that TPO levels may be regulated not only by platelets but also megakaryocytes in AA and ITP.
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Affiliation(s)
- Naoaki Ichikawa
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Fumihiro Ishida
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Shigetaka Shimodaira
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tomoyuki Tahara
- The Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd., Maebashi, Japan
| | - Takashi Kato
- The Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd., Maebashi, Japan
| | - Kiyoshi Kitano
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
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Takamiya O, Ishida F, Kodaira H, Kitano K. APC-Resistance and Mnl I Genotype (Gin 506) of Coagulation Factor V Are Rare in Japanese Population. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1649866] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Osamu Takamiya
- Department of Medical Technology, School of Allied Medical Sciences and The Second Department of Internal Medicine, School of Medicine, Shinshu University, Japan
| | - Fumihiro Ishida
- Department of Medical Technology, School of Allied Medical Sciences and The Second Department of Internal Medicine, School of Medicine, Shinshu University, Japan
| | - Hiroshi Kodaira
- Department of Medical Technology, School of Allied Medical Sciences and The Second Department of Internal Medicine, School of Medicine, Shinshu University, Japan
| | - Kiyoshi Kitano
- Department of Medical Technology, School of Allied Medical Sciences and The Second Department of Internal Medicine, School of Medicine, Shinshu University, Japan
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Nose K, Fujioka S, Yoshida R, Hayashi Y, Kitano K, Maruyama S, Kikuchi H, Tsuboi Y. A potential therapeutic option for postural deformities in Parkinson disease. Parkinsonism Relat Disord 2018. [DOI: 10.1016/j.parkreldis.2017.11.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kurokawa Y, Kamijo T, Kunishima S, Kenny D, Kitano K, Koike K, Ishida F. A Missense Mutation (Tyr88 to Cys) in the Platelet Membrane Glycoprotein Ibβ Gene Affects GPIb/IX Complex Expression. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1616058] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryThis study examined the molecular basis of a missense mutation of the platelet glycoprotein (GP) Ibβ gene in two families. In the propositus with a novel form of Bernard-Soulier syndrome (BSS) from Family I, only GPIbα was detectable in reduced amounts on platelet surfaces by flow cytometry. There were no GPIX or GPIbβ found by immunoblotting. DNA sequencing analysis showed a homozygous mutation in the GPIbβ gene which changed Tyr (TAC) to Cys (TGC) at residue 88. Her parents were heterozygous for Tyr88Cys in the GPIbβ gene. In transient transfection studies on 293T cells, both Tyr88Cys and Tyr88Ala mutations suppressed the expression of GPIb/IX complexes. In addition, Tyr88Cys GPIbβ mutation was found to exert a dominant negative effect on the GPIb expression.Five individuals from Family II, four of whom reported elsewhere as having giant platelet disorders with normal aggregation (BLOOD, 1997; 89: 2404) and one newly analyzed in this study, were heterozygous for Tyr88Cys in the GPIb gene. Microsatellite analysis of chromosome 22 showed a common haplotype in 8 of the individuals with Tyr88Cys mutations in Families I and II. Tyr88 in the GPIbβ gene plays a significant role in the GPIb/IX expression; the defect causes BSS in a homozygous form and possibly giant platelets in a heterozygous form.
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Terasawa F, Higuchi Y, Ishikawa S, Tozuka M, Ishida F, Kitano K, Katsuyama T, Okumura N. Fibrinogen Matsumoto III: a Variant with γ275 Arg→Cys (CGC→TGC) – Comparison of Fibrin Polymerization Properties with those of Matsumoto I (γ364 Asp→His) and Matsumoto II (γ308 Asn→Lys). Thromb Haemost 2017. [DOI: 10.1055/s-0037-1614568] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryFibrinogen Matsumoto III (M-III) is a dysfibrinogen identified in a 66-year-old woman with rectal cancer. The fibrinogen level determined by the thrombin-time method was markedly decreased in preoperative coagulation tests of her plasma. Three fibrinogen polypeptide-chain gene fragments from the proposita were amplified by the polymerase chain reaction method, then sequenced. The triplet CGC encoding the amino acid residue γ275 was replaced by TGC, resulting in the substitution of Arg→Cys. There have been previous reports of nine families with the same alteration, nine families with an Arg→His variant and one family with an Arg→Ser variant in this residue, which has been shown to be one of the most important amino acids in the ’D:D’ interaction site. In addition, there are three silent mutations in the Aα-chain gene and two mutations in the intron of the Bβ-chain and the γ-chain gene. However, none of these mutations is thought to be the cause of the dysfunctional fibrinogen. The thrombin-catalyzed fibrin polymerization in the presence of 1 mM Ca ions was markedly delayed in purified M-III. Its lag period was longer than those of Matsumoto II (M-II; γ308Asn→Lys) and Matsumoto I (M-I; γ364Asp→His). γ364Asp is one of the most important residues in the polymerization pocket of the ’D:E’ interaction site and γ308Asn is located in the vicinity of a high affinity Ca2+ binding site in the D-domain, γ311-336. The maximum slope of the polymerization curve for M-III was about 4-fold steeper than that for M-I but less steep than that for M-II. These results may suggest that the tertiary structure of the polymerization pocket plays a more important role in the lateral aggregation of protofibrils than that of the ’D:D’ interaction site.
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Karasaki T, Nagayama K, Fukumoto K, Kitano K, Nitadori J, Sato M, Anraku M, Hosoi A, Matsushita H, Kakimi K, Nakajima J. P1.07-017 Assessment of Cancer Immunity Status in Each Patient Using Immunogram. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kitano K, Maeda H. Rabi oscillations in the spatial profiles of superfluorescent pulses from rubidium vapor. Opt Express 2017; 25:23826-23832. [PMID: 29041332 DOI: 10.1364/oe.25.023826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 09/15/2017] [Indexed: 06/07/2023]
Abstract
In this study, we investigate 420-nm yoked superfluorescence (YSF) emitted from the atomic vapor of rubidium (Rb) by driving the Rb 5S - 5D two-photon transition with an ultrashort pulsed laser. When the pump pulse is close to its transform limit (~ 100 fs) or down-chirped up to around 200 fs, the 420-nm YSF appears as a low-divergence beam with a ring-shaped radial profile. Although such a beam profile is less sensitive to the vapor pressure of Rb in a cell, its diameter rigorously varies as a function of the pump-pulse power. By numerically solving a time-dependent Schrödinger equation for a single-Rb atom, we well reproduce our experimental observation, indicating that a single-atom Rabi oscillation is responsible for the spatial beam profile of the 420-nm emission.
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Kikuchi H, Narita Y, Abe M, Odachi K, Kitano K, Harada Y, Fukagawa C, Nakai M, Tsuboyama Y. Nationwide survey of respite admission for incurable neurodegenerative diseases in japan. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Affiliation(s)
- S. Okada
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T. Masumoto
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S. Yamamoto
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M. Inomoto
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - K. Kitano
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S. Yoshimura
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Nagai H, Shimomura T, Takeuchi M, Hanada S, Komeno T, Sunami K, Hidaka M, Yano T, Kitano K, Yoshida I, Inoue N, Saito A, Horibe K, Motitani S, Ichihara S, Watanabe T, Sawamura M. Phase II study of intensified rituximab induction and maintenance for low grade B cell lymphoma. Leuk Lymphoma 2017; 58:2845-2851. [PMID: 28509595 DOI: 10.1080/10428194.2017.1319054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Rituximab has markedly improved the outcomes of B cell lymphoma, and its maintenance has been shown to be beneficial in low grade B cell lymphoma (LGBCL). We conducted a multicenter, phase II trial of intensive rituximab induction and maintenance therapy for LGBCL to optimize the rituximab monotherapy. Patients with newly diagnosed or rituximab naïve relapsed LGBCL received 8 weekly rituximab as induction, then continued maintenance therapy with rituximab for 4 weeks at 6-month intervals. The primary endpoint was the overall response rate (ORR). Forty-five patients were enrolled from 2005 to 2009 and 36 were eligible. The ORR was 83.3% (30/36) with a complete response rate of 72.2% (26/36). The 3-year progression-free survival (PFS) was 76.7% with a median follow-up of 43.0 months. Five grade three toxicities were observed (no grade 4). Our findings suggest that this regimen demonstrates high activity with durable PFS and minimal toxicity in LGBCL patients.
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Affiliation(s)
- Hirokazu Nagai
- a Department of Hematology , National Hospital Organization Naogoya Medical Center , Nagoya , Japan.,b Clinical Research Center , National Hospital Organization Naogoya Medical Center , Nagoya , Japan
| | - Takeshi Shimomura
- c Department of Hematology , National Hospital Organization Hiroshima-nishi Medical Center , Otake , Japan
| | - Makoto Takeuchi
- d Department of Hematology , National Hospital Organization Minami-Okayama Medical Center , Tsukubo , Japan
| | - Shuichi Hanada
- e Department of Hematology , National Hospital Organization Kagoshima Medical Center , Kagoshima , Japan
| | - Takuya Komeno
- f Department of Hematology , National Hospital Organization Mito Medical Center , Mito , Japan
| | - Kazutaka Sunami
- g Department of Hematology , National Hospital Organization Okayama Medical Center , Okayama , Japan
| | - Michihiro Hidaka
- h Department of Hematology , National Hospital Organization Kumamoto Medical Center , Kumamoto , Japan
| | - Takahiro Yano
- i Department of Hematology , National Hospital Organization Tokyo Medical Center , Tokyo , Japan
| | - Kiyoshi Kitano
- j Department of Hematology , National Hospital Organization Matsumoto Medical Center , Matsumoto , Japan
| | - Isao Yoshida
- k Department of Hematology , National Hospital Organization Shikoku Cancer Center , Matsuyama , Japan
| | - Nobumasa Inoue
- l Department of Hematology , National Hospital Organization Osaka Medical Center , Osaka , Japan
| | - Akiko Saito
- b Clinical Research Center , National Hospital Organization Naogoya Medical Center , Nagoya , Japan
| | - Keizo Horibe
- b Clinical Research Center , National Hospital Organization Naogoya Medical Center , Nagoya , Japan
| | - Suzuko Motitani
- m Department of Pathology , National Hospital Organization Naogoya Medical Center , Nagoya , Japan
| | - Shu Ichihara
- m Department of Pathology , National Hospital Organization Naogoya Medical Center , Nagoya , Japan
| | - Tomoyuki Watanabe
- b Clinical Research Center , National Hospital Organization Naogoya Medical Center , Nagoya , Japan.,n Department of Nutritional Science , Aichi Gakuin University , Nisshin , Japan
| | - Morio Sawamura
- o Department of Hematology , National Hospital Organization Shibukawa Medical Center , Shibukawa , Japan
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Kawakami T, Hirabayashi Y, Kawakami F, Isobe R, Kaneko N, Mimura Y, Ito T, Furuta K, Shimazaki M, Nakazawa H, Kitano K. Persistent Infection of Drug-resistant Influenza A Virus during Chemotherapy for Malignant Lymphoma. Intern Med 2016; 55:1807-10. [PMID: 27374689 DOI: 10.2169/internalmedicine.55.6327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We herein report the case of an 80-year-old man with malignant lymphoma who became persistently infected with influenza A virus. Although he was repeatedly treated with NA inhibitors, such as oseltamivir or peramivir, nasal cavity swab tests for influenza A antigen continued to be positive for more than 2 months. Virological analyses revealed that he was infected with the NA inhibitor-resistant A (H3N2) virus possessing an R292K substitution in the NA protein. These findings suggest that a drug-resistant influenza virus strain might selectively survive antiviral therapy in elderly patients with refractory malignant lymphoma undergoing multiple chemotherapies.
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Affiliation(s)
- Toru Kawakami
- Division of Hematology, NHO Matsumoto Medical Center, Japan
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25
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Abstract
A 41-year-old nurse was referred to our hospital with a fever and disturbed consciousness. She tested positive for influenza antigen. CT and MRI findings revealed low density and intensity areas in the right occipital and lateral lobes with remarkable brain edema, which led to a diagnosis of influenza encephalopathy. Influenza A antibodies in the serum were below the detection limit despite the patient receiving previous vaccination three months earlier. A PCR analysis revealed that the influenza HA gene was classified into clade 3C.2a, subclass AH3N2. The present case indicates the potential development of encephalopathy in adults under certain conditions.
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Affiliation(s)
- Kiyoshi Kitano
- Department of Hematology, NHO Matsumoto Medical Center, Japan
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26
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Kawakami T, Sakai K, Mimura Y, Senoo Y, Hirabayashi Y, Nakazawa H, Koshihara H, Oguchi K, Takei YI, Ohara S, Watanabe N, Nakazawa K, Oyanagi K, Kitano K. Development of primary central nervous system lymphoma associated with human immunodeficiency virus and JC virus infection. J Clin Exp Hematop 2015; 54:211-7. [PMID: 25501112 DOI: 10.3960/jslrt.54.211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
We report here a case of a 37-year-old man with human immunodeficiency virus (HIV) infection followed by JC virus (JCV) infection and primary central nervous system lymphoma (PCNSL). The patient had been infected with HIV type 1 due to blood products for hemophilia A during infancy. He had progression of nervous symptoms and was diagnosed with progressive multifocal leukoencephalopathy (PML) clinically at the age of 36, when his CD4-positive lymphocyte counts ranged between 350 and 450/μl. Oral mefloquine, intravenous methylprednisolone pulse therapy, and intravenous immunoglobulin were not effective for the PML, and the patient entered a vegetative state. Brain biopsy revealed JCV infection without pathological findings of PML. Eight months after the clinical diagnosis of PML, he developed respiratory failure and brain magnetic resonance imaging revealed a mass lesion in the brain stem. The patient died 19 months after the diagnosis of PML. Autopsy findings were compatible with PCNSL. EBV-encoded small RNA-1-positive cells were not detected. We present a case of JCV-positive PCNSL with HIV infection complicated with clinical PML.
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Affiliation(s)
- Toru Kawakami
- Department of Hematology, NHO Matsumoto Medical Center
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27
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Sasaki S, Fukushima T, Maruyama Y, Gomi D, Kobayashi T, Sekiguchi N, Sakamoto A, Koizumi T, Kitano K. Two Cases of Thymic Carcinoma Initially Presenting as Bone Metastasis: A Clinical Report and the Usefulness of CD5 Immunohistochemistry for Assessing Bone Lesions. Intern Med 2015; 54:1781-5. [PMID: 26179536 DOI: 10.2169/internalmedicine.54.4250] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Thymic carcinoma frequently spreads to the pleural space, regional lymph nodes, liver and lungs. However, an initial clinical presentation involving spinal or multiple bone metastases in patients with thymic carcinoma is extremely rare. We experienced two cases of thymic carcinoma that initially presented with spinal compression and severe pain due to multiple bone metastases, respectively. Both patients were histologically diagnosed with metastatic thymic squamous cell carcinoma based on the findings of specimens resected from the metastatic bone lesions. We herein describe the clinical courses of these cases and review the characteristics of bone metastasis of thymic carcinoma.
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Affiliation(s)
- Shigeru Sasaki
- Department of Comprehensive Cancer Therapy, Shinshu University School of Medicine, Japan
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28
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Murakawa T, Ichinose J, Hino H, Kitano K, Konoeda C, Karasaki T, Nagayama K, Nitadori J, Anraku M, Nakajima J. F-117 * POSSIBLE MISINTERPRETATION OF OUTCOMES OF VIDEO-ASSISTED THORACOSCOPIC LUNG LOBECTOMY FOR TREATMENT OF EARLY STAGE NON-SMALL-CELL LUNG CANCER CAUSED BY CURRENT TNM CLASSIFICATION SYSTEM. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu167.117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Nakazawa H, Nishina S, Mimura Y, Kawakami T, Senoo Y, Sakai K, Nakazawa K, Kitano K. Tumor lysis syndrome in a chronic lymphocytic leukemia patient with pleural effusion after oral fludarabine and cyclophosphamide therapy. Int J Hematol 2014; 99:782-5. [DOI: 10.1007/s12185-014-1560-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 02/21/2014] [Accepted: 02/23/2014] [Indexed: 11/29/2022]
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Konoeda C, Koinuma D, Morishita Y, Kitano K, Nagayama K, Anraku M, Kakimi K, Miyazono K, Nakajima J, Murakawa T. Origin of Fibroblasts in Rejected Airway: Experiment with Orthotopic Tracheal Allotransplantation Model Using Transgenic GFP Mice. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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31
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Ishii N, Kaneshima K, Kitano K, Kanai T, Watanabe S, Itatani J. Sub-two-cycle, carrier-envelope phase-stable, intense optical pulses at 1.6 μm from a BiB3O6 optical parametric chirped-pulse amplifier. Opt Lett 2012; 37:4182-4. [PMID: 23073404 DOI: 10.1364/ol.37.004182] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report on the generation of 9.0 fs, 550 μJ, carrier-envelope phase (CEP)-stabilized optical pulses around 1.6 μm at 1 kHz. Few-cycle IR pulses are obtained from a BiB(3)O(6) optical parametric chirped-pulse amplifier. The amplification of nearly octave-spanning ultrabroad pulses without spectral broadening results in good stability in output energy (0.85% rms) and CEP (160 mrad rms). We observed high harmonics in the water window from a neon cell that corresponds to a laser intensity of 4.1×10(14) W/cm(2).
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Affiliation(s)
- N Ishii
- Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan. ‑tokyo.ac.jp
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Yotsumoto M, Hagiwara S, Ajisawa A, Tanuma J, Uehira T, Nagai H, Fujikawa Y, Maeda S, Kitano K, Arima N, Uno K, Iwai T, Hongo I, Ota Y, Fukutake K, Okada S. Clinical characteristics of human immunodeficiency virus-associated Hodgkin lymphoma patients in Japan. Int J Hematol 2012; 96:247-53. [DOI: 10.1007/s12185-012-1127-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 05/28/2012] [Accepted: 06/06/2012] [Indexed: 12/14/2022]
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Abstract
The precision and rigidity of compact ultrahigh vacuum (UHV) rotary feedthroughs were substantially improved by preparing and installing an optimal crossed roller bearing with mounting holes. Since there are mounting holes on both the outer and inner races, the bearing can be mounted directly to rotary and stationary stages without any fixing plates and housing. As a result, it is possible to increase the thickness of the bearing or the size of the rolling elements in the bearing without increasing the distance between the rotating and fixing International Conflat flanges of the UHV rotary feedthrough. Larger rolling elements enhance the rigidity of the UHV rotary feedthrough. Moreover, owing to the structure having integrated inner and outer races and mounting holes, the performance is almost entirely unaffected by the installation of the bearing, allowing for a precise optical encoder to be installed in the compact UHV rotary feedthrough. Using position feedback via a worm gear system driven by a stepper motor and a precise rotary encoder, the actual angle of the compact UHV rotary feedthrough can be controlled with extremely high precision.
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Affiliation(s)
- Y Aiura
- National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
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Yamamoto K, Uchida S, Kitano K, Fukuhara N, Okumura-Kitajima L, Gunji E, Kozakai A, Tomoike H, Kojima N, Asami J, Toyoda H, Arai M, Takahashi T, Takahashi K. TS-071 is a novel, potent and selective renal sodium-glucose cotransporter 2 (SGLT2) inhibitor with anti-hyperglycaemic activity. Br J Pharmacol 2012; 164:181-91. [PMID: 21410690 DOI: 10.1111/j.1476-5381.2011.01340.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE The renal sodium-glucose cotransporter 2 (SGLT2) plays an important role in the reuptake of filtered glucose in the proximal tubule and therefore may be an attractive target for the treatment of diabetes mellitus. This study characterizes the pharmacological profile of TS-071 ((1S)-1,5-anhydro-1-[5-(4-ethoxybenzyl)-2-methoxy-4-methylphenyl]-1-thio-D-glucitol hydrate), a novel SGLT2 inhibitor in vitro and in vivo. EXPERIMENTAL APPROACH Inhibition of glucose uptake by TS-071 was studied in CHO-K1 cells stably expressing either human SGLT1 or SGLT2. Single oral dosing studies were performed in rats, mice and dogs to assess the abilities of TS-071 to increase urinary glucose excretion and to lower plasma glucose levels. KEY RESULTS TS-071 inhibited SGLT2 activity in a concentration-dependent manner and was a potent and highly selective inhibitor of SGLT2. Orally administered TS-071 increased urinary glucose excretion in Zucker fatty rats and beagle dogs at doses of 0.3 and 0.03 mg·kg(-1) respectively. TS-071 improved glucose tolerance in Zucker fatty rats without stimulating insulin secretion and reduced hyperglycaemia in streptozotocin (STZ)-induced diabetic rats and db/db mice at a dose of 0.3 mg·kg(-1). CONCLUSION AND IMPLICATIONS These data indicate that TS-071 is a potent and selective SGLT2 inhibitor that improves glucose levels in rodent models of type 1 and 2 diabetes and may be useful for the treatment for diabetes mellitus.
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Affiliation(s)
- K Yamamoto
- Molecular Function and Pharmacology Laboratories, Taisho Pharmaceutical Co., Ltd, Saitama, Japan.
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Kitano K, Murayama T, Sakamoto M, Nagayama K, Ueno K, Murakawa T, Nakajima J. Outcome and survival analysis of pulmonary metastasectomy for hepatocellular carcinoma. Eur J Cardiothorac Surg 2011; 41:376-82. [DOI: 10.1016/j.ejcts.2011.05.052] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Kitano K, Konoeda C, Tanaka M. [Multiple presentation of undifferentiated pleomorphic sarcoma in the mediastinum]. Kyobu Geka 2010; 63:1045-1048. [PMID: 21066845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A case of undifferentiated pleomorphic sarcoma in the mediastinum is presented. A 74-year-old man with no complaint was referred to our department for treatment of mediastinal mass pointed out by chest X-ray. Chest computed tomography (CT) revealed 3 tumors located in the left mediastinum. The largest one was adjacent to the esophagus with 10 cm in diameter. The other one was located beneath the left inferior pulmonary vein, and the last adjacent to the pulmonary artery trunk. Complete extirpation of the tumors was unsuccessful because of the invasion to the pulmonary artery trunk. A diagnosis of undifferentiated pleomorphic sarcoma was made with negative immunohistochemical staining for markers except for vimentin. Tumor cells were found to be scattered in the partially resected thymus. We assume this is a rare presentation of mediastinal dissemination of the tumor.
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Affiliation(s)
- K Kitano
- Department of Cardiothoracic Surgery, The University of Tokyo, Graduate School of Medicine, Tokyo, Japan
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38
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Sano A, Kosugi N, Kitano K, Sakamoto M, Yoshida Y, Fukami T, Murakawa T, Nakajima J. [Thymoma with synchronous pulmonary metastasis; report of a case]. Kyobu Geka 2010; 63:1090-1093. [PMID: 21066855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report a resected case of thymoma with a solitary pulmonary metastasis. A 63-year-old woman had pointed out a solitary nodule in right lung field on chest X-ray. Computed tomography (CT) scan showed an anterior mediastinal tumor and a solitary lung nodule in the right lower lobe. Extended thymectomy and partial resection of right lung was performed. Pathological diagnosis showed an invasive thymoma (type B3) and a pulmonary metastasis. Post operative radiotherapy was administered and she is doing well 19 months following the resection. Thymoma with a solitary synclonous pulmonary metastasis is rare and is classified into Masaoka stage IVb. Generally, thymoma cases with distant metastasis are not indication for operation. But, if radical resection is possible, operation is recommended for good prognosis.
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Affiliation(s)
- A Sano
- Department of Cardiothoracic Surgery, The University of Tokyo, Graduate School of Medicine Tokyo, Japan
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40
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Joshita S, Nakazawa K, Koike S, Kamijo A, Matsubayashi K, Miyabayashi H, Furuta K, Kitano K, Yoshizawa K, Tanaka E. A case of granulocyte-colony stimulating factor-producing hepatocellular carcinoma confirmed by immunohistochemistry. J Korean Med Sci 2010; 25:476-80. [PMID: 20191051 PMCID: PMC2826740 DOI: 10.3346/jkms.2010.25.3.476] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2008] [Accepted: 03/04/2009] [Indexed: 12/27/2022] Open
Abstract
Granulocyte-colony stimulating factor (G-CSF) is a naturally occurring glycoprotein that stimulates the proliferation and maturation of precursor cells in the bone marrow into fully differentiated neutrophils. Several reports of G-CSF-producing malignant tumors have been published, but scarcely any in the hepatobiliary system, such as in hepatocellular carcinoma (HCC). Here, we encountered a 69-yr-old man with a hepatic tumor who had received right hepatic resection. He showed leukocytosis of 25,450/microL along with elevated serum G-CSF. Histological examination of surgical samples demonstrated immunohistochemical staining for G-CSF, but not for G-CSF receptor. The patient survived without recurrence for four years, but ultimately passed away with multiple bone metastases. In light of the above, clinicians may consider G-CSF-producing HCC when encountering patients with leukocytosis and a hepatic tumor. More cases are needed to clarify the clinical picture of G-CSF-producing HCC.
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Affiliation(s)
- Satoru Joshita
- Department of Internal Medicine, Matsumoto Medical Center, Matsumoto, Japan.
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Kitano K, Tsuruike M, Robertson CT, Kocejal DM. Effects of a complex balance task on soleus H-reflex and presynaptic inhibition in humans. Electromyogr Clin Neurophysiol 2009; 49:235-243. [PMID: 19694211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Spinal modulation of motoneuron excitability has been extensively investigated during various tasks in humans. Previous studies have revealed that balance tasks induce a decrease in Ia-motoneuron communication which has been attributed to increased levels of presynaptic inhibition (PI). Moreover, this depression in Ia-motoneuron connectivity takes place subsequent to the elevation of muscle activity. Therefore, it is hypothesized that motor learning has inhibitory effects on the spinal mechanisms in spite of the increased muscle activity during a motor task. The purpose of this study was to explore the effects of a complex balance task on the H-reflex. Soleus H-reflexes were measured from 11 healthy adult subjects both before and after 20 minutes of a complex balance task. A commonly reported H-reflex conditioning technique was applied in order to measure changes in spinal PI: an electrical volley to the heteronymous Ia (common peroneal nerve conditioning, CPN). Subjects stood on a custom designed balance board and performed a continuous series of plantar and dorsiflexion. To ensure that the task was performed similarly between subjects, auditory cues for movement were given by a metronome with a frequency of 1 Hz. The initial amplitude of the unconditioned soleus H-reflex was set at 50% of H-max, and unconditioned and conditioned (PI) reflexes were recorded before, during, and after the balance task. The unconditioned soleus H-reflex was significantly decreased 59% after the balance task and PI was increased by 50%. Further, during a period of rest following the task (20 minutes) the unconditioned H-reflex returned to near baseline levels whereas the PI conditioned H-reflex was not altered The results suggest that the initial depression in motoneuron excitability immediately after the balance task is accompanied by an increase in PI, but also that the recovery of the depressed H-reflex after the task appears to be independent of PI.
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Affiliation(s)
- K Kitano
- Motor Control Laboratory, Dept. of Kinesiology, Indiana University, Bloomington, IN 47405, USA
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Nagaya T, Tanaka N, Kamijo A, Joshita S, Nakazawa K, Miyabayashi H, Yoneda S, Ito T, Komatsu M, Tanaka E, Kitano K. Primitive neuroectodermal tumor as a differential diagnosis of CD56-positive tumors in adults. Intern Med 2009; 48:1267-72. [PMID: 19652428 DOI: 10.2169/internalmedicine.48.1980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 33-year-old Japanese man was referred to our hospital after a huge intrapelvic tumor with bilateral hydronephrosis was found following persistent lumbago. Natural killer/T-cell lymphoma was suspected due to positive immunostaining for CD56, but CHOP therapy was ineffective. Re-evaluation of the tumor cells showed that they were positive for CD99, neuron-specific enolase, and synaptophysin and had a t(11 ; 22) (q24 ; q12) translocation, leading to the revised diagnosis of primitive neuroectodermal tumor (PNET). Systemic chemotherapies and radiation therapy were added to surgical resection, and no recurrence has been detected for 3 years. Taken together, PNET may be considered in adult patients with CD56-positive tumors.
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MESH Headings
- Adult
- CD56 Antigen/metabolism
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 22/genetics
- Diagnosis, Differential
- Humans
- Lymphoma, Extranodal NK-T-Cell/diagnosis
- Lymphoma, Extranodal NK-T-Cell/immunology
- Male
- Neuroectodermal Tumors, Primitive/diagnosis
- Neuroectodermal Tumors, Primitive/genetics
- Neuroectodermal Tumors, Primitive/immunology
- Oncogene Proteins, Fusion/genetics
- Pelvic Neoplasms/diagnosis
- Pelvic Neoplasms/genetics
- Pelvic Neoplasms/immunology
- Proto-Oncogene Protein c-fli-1/genetics
- RNA-Binding Protein EWS
- Sarcoma, Ewing/diagnosis
- Sarcoma, Ewing/genetics
- Sarcoma, Ewing/immunology
- Stomach Neoplasms/diagnosis
- Stomach Neoplasms/immunology
- Translocation, Genetic
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Affiliation(s)
- Tadanobu Nagaya
- Department of Internal Medicine, Matsumoto Medical Center, Matsumoto
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43
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Joshita S, Nakazawa K, Sugiyama Y, Kamijo A, Matsubayashi K, Miyabayashi H, Furuta K, Kitano K, Kawa S. Granulocyte-colony stimulating factor-producing pancreatic adenosquamous carcinoma showing aggressive clinical course. Intern Med 2009; 48:687-91. [PMID: 19420814 DOI: 10.2169/internalmedicine.48.1900] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Herein, we encountered an 89-year-old woman with pancreatic cancer who presented with fever without infective focus, leukocytosis of 45,860 /microL, and elevation of serum granulocyte-colony stimulating factor (G-CSF). The patient could not receive any curative therapy due to an extremely aggressive clinical course. Specimens taken at necropsy revealed an adenosquamous carcinoma positive for G-CSF by immunohistochemistry; it was only the second reported case to date. She was finally diagnosed with G-CSF-producing pancreatic cancer. In light of the above, clinicians should consider the presence of G-CSF-producing tumors, including pancreatic cancer, when presented with patients showing leukocytosis of unknown origin and fever without infective focus.
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Affiliation(s)
- Satoru Joshita
- Department of Internal Medicine, Matsumoto Medical Center
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Mori T, Kitano K, Terawaki S, Maesaki R, Fukami Y, Hakoshima T. Structural basis for CD44 recognition by ERM proteins. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308092490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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45
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Sakurai S, Uchida M, Kitano K, Yamaguchi H, Morioka H, Hakoshima T. Crystallization and structure of human flap endonuclease 1, FEN1, in complex with a DNA product. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308090326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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46
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Kitano K, Toshio H. Crystal structure of the HRDC domain of human Werner syndrome protein, WRN. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308090399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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47
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Terawaki S, Kitano K, Hakoshima T. Structural basis of type-II membrane protein binding by ERM proteins. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308089770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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48
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Ito T, Makishima H, Nakazawa H, Kobayashi H, Shimodaira S, Nakazawa Y, Kitano K, Matsuda K, Hidaka E, Ishida F. Promising approach for aggressive NK cell leukaemia with allogeneic haematopoietic cell transplantation. Eur J Haematol 2008; 81:107-11. [DOI: 10.1111/j.1600-0609.2008.01090.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Soga K, Tsuji T, Tashiro F, Chiba J, Oishi M, Yoshimoto K, Nagasaki Y, Kitano K, Hamaguchi S. Development of NIR bioimaging systems. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/106/1/012023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Satake A, Takaoka M, Nishikawa M, Yuba M, Shibata Y, Okumura K, Kitano K, Tsutsui H, Fujii K, Kobuchi S, Ohkita M, Matsumura Y. Protective effect of 17β-estradiol on ischemic acute renal failure through the PI3K/Akt/eNOS pathway. Kidney Int 2008; 73:308-17. [DOI: 10.1038/sj.ki.5002690] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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