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Muto S, Tatsumi K, Rusz J. Parameter-free extraction of EMCD from an energy-filtered diffraction datacube using multivariate curve resolution. Ultramicroscopy 2013; 125:89-96. [DOI: 10.1016/j.ultramic.2012.09.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 09/15/2012] [Accepted: 09/23/2012] [Indexed: 11/30/2022]
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Sogabe S, Fukushima H, Yuki S, Kobayashi Y, Miyagishima T, Okuda H, Kusumi T, Doi A, Tsuji Y, Kawamoto Y, Ehira N, Koike M, Meguro T, Takahashi Y, Yoshizaki K, Muto S, Ishiguro A, Kato S, Sakata Y, Komatsu Y. Retrospective cohort study on the safety and efficacy of panitumumab (Pmab) for patients with metastatic colorectal cancer (mCRC): The HGCSG1002 study—Analysis of clinical early predictor for the efficacy. J Clin Oncol 2013. [DOI: 10.1200/jco.2013.31.4_suppl.593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
593 Background: Inhibition of the EGFR pathway has become a key part in the treatment of colorectal cancer. There were few studies for clinical early predictive markers. To investigate the early magnesium (Mg2+), calcium (Ca2+), albumin (Alb), CEA and CA 19-9 plasma level reductions as a predictor for clinical outcome in terms of progression free survival (PFS) and overall survival (OS). Methods: 200 patients (pts) with mCRC treated by Pmab contained chemotherapy were retrospectively registered from 20 centers in Japan (HGCSG 1002 study). Of these, the pts that were refractory to or intolerant for 5-FU/ irinotecan/ oxaliplatin, and were never administered anti-EGFR-antibody, were included in this analysis. Mg2+, Ca2+, Alb, CEA and CA19-9 plasma levels were obtained from medical records. The differences in terms of PFS and OS according to the presence of Mg2+, Ca2+, Alb, CEA and CA19-9 reductions were evaluated by the log-rank test. Results: Of 67 pts were able to evaluate for this analysis. Pts’ characteristics were as follows: male/female 38/29, median age 64 (range 45-81), ECOG PS (0/1/2- ) 45/17/5. Response rate and disease control rate were 16.4% and 65.7%, PFS and OS were 4.3 m and 12.4 m, respectively. There were no correlations between Ca/Alb plasma level reductions and PFS/OS. Mg2+ reduction of at least 50% respect to the basal value during the course of treatment was significantly correlated with improved OS and PFS (OS, P=0.03; PFS, P=0.01), but the early reduction (until the 4th week or the 8th week after start of chemotherapy) was not correlated with OS and PFS. An early CEA serum level reduction of at least 40% until the 8th week was significantly correlated with improved OS and PFS (OS, P=0.04; PFS, P=0.07), moreover of at least 30% until the 4th week was correlated to longer PFS (P=0.053). Similar results were seen in CA19-9. Conclusions: An early CEA plasma level reduction of at least 30% or 40% was suggested to be a predictor for PFS in Pmab containing chemotherapy for mCRC pts. Although Mg2+ serum level reduction was correlated to clinical outcome, but could not show that is an early predictor for PFS and OS in our study.
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Nakatsumi H, Komatsu Y, Yuki S, Sogabe S, Tateyama M, Muto S, Kudo M, Kato K, Miyagishima T, Uebayashi M, Meguro T, Oba K, Asaka M. Optimal dose period for indisetron tablets for preventing chemotherapy-induced nausea and vomiting with modified FOLFOX6: a randomized pilot study. Chemotherapy 2013; 58:439-44. [PMID: 23364217 DOI: 10.1159/000345920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 11/18/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUND Indisetron is a serotonin (5-hydroxytryptamine type 3) receptor antagonist that also antagonizes 5-hydroxytryptamine type 4 receptors. We designed a pilot study in order to explore the optimal dosing period for indisetron during modified FOLFOX6 (mFOLFOX6). PATIENTS AND METHODS Forty-two chemotherapy-naive patients with advanced colorectal cancer scheduled to receive mFOLFOX6 were randomly assigned to either a 1- or 3-day indisetron regimen arm. The primary endpoint was complete protection from vomiting. RESULTS Proportions of patients with complete protection from vomiting were 85.7% [95% confidence interval (CI) 63.7-97.0] with the 3-day regimen and 81.0% (95% CI 58.1-94.6) with the 1-day regimen. Proportions of patients with complete protection from nausea were 47.6% in each arm (95% CI 25.7-70.2). No rescue therapy rates were 66.7% (95% CI 43.0-85.4) versus 57.1% (95% CI 34.0-78.2). No severe adverse events were observed in either arm. CONCLUSION Both 1- and 3-day indisetron regimens were feasible for preventing nausea and vomiting induced by mFOLFOX6.
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Takeda H, Muto S, Nakagawa K, Ohnishi S, Asaka M. Rikkunshito and Ghrelin Secretion. Curr Pharm Des 2012; 18:4827-38. [DOI: 10.2174/138161212803216933] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 04/05/2012] [Indexed: 11/22/2022]
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Harada T, Ohkubo I, Lippmaa M, Sakurai Y, Matsumoto Y, Muto S, Koinuma H, Oshima M. Spin-filter tunnel junction with matched fermi surfaces. PHYSICAL REVIEW LETTERS 2012; 109:076602. [PMID: 23006390 DOI: 10.1103/physrevlett.109.076602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Indexed: 06/01/2023]
Abstract
Efficient injection of spin-polarized current into a semiconductor is a basic prerequisite for building semiconductor-based spintronic devices. Here, we use inelastic electron tunneling spectroscopy to show that the efficiency of spin-filter-type spin injectors is limited by spin scattering of the tunneling electrons. By matching the Fermi-surface shapes of the current injection source and target electrode material, spin injection efficiency can be significantly increased in epitaxial ferromagnetic insulator tunnel junctions. Our results demonstrate that not only structural but also Fermi-surface matching is important to suppress scattering processes in spintronic devices.
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Ohtsubo T, Stone NJ, Stone JR, Towner IS, Bingham CR, Gaulard C, Köster U, Muto S, Nikolov J, Nishimura K, Simpson GS, Soti G, Veskovic M, Walters WB, Wauters F. Magnetic dipole moment of the doubly-closed-shell plus one proton nucleus 49Sc. PHYSICAL REVIEW LETTERS 2012; 109:032504. [PMID: 22861842 DOI: 10.1103/physrevlett.109.032504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2012] [Indexed: 06/01/2023]
Abstract
The nucleus 49Sc, having a single f(7/2) proton outside doubly magic 48Ca (Z=20, N=28), is one of the very few isotopes which makes possible testing of the fundamental theory of nuclear magnetism. The magnetic moment has been measured by online β NMR of nuclei oriented at milli-Kelvin temperatures to be (+)5.616(25) μ(N). The result is discussed in terms of a detailed theory of the structure of the magnetic moment operator, showing excellent agreement with calculated departure from the f(7/2) Schmidt limit extreme single-particle value. The measurement completes the sequence of moments of Sc isotopes with even numbers of f(7/2) neutrons: the first such isotopic chain between two major shells for which a full set of moment measurements exists. The result further completes the isotonic sequence of ground-state moments of nuclei with an odd number of f(7/2) protons coupled to a closed subshell of f(7/2) neutrons. Comparison with a recent shell-model calculation of the latter sequence is made.
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Nahata M, Muto S, Oridate N, Ohnishi S, Nakagawa K, Sadakane C, Saegusa Y, Hattori T, Asaka M, Takeda H. Impaired ghrelin signaling is associated with gastrointestinal dysmotility in rats with gastroesophageal reflux disease. Am J Physiol Gastrointest Liver Physiol 2012; 303:G42-53. [PMID: 22517773 PMCID: PMC3404573 DOI: 10.1152/ajpgi.00462.2011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Gastroesophageal reflux disease (GERD) is often associated with decreased upper gastrointestinal motility, and ghrelin is an appetite-stimulating hormone known to increase gastrointestinal motility. We investigated whether ghrelin signaling is impaired in rats with GERD and studied its involvement in upper gastrointestinal motility. GERD was induced surgically in Wistar rats. Rats were injected intravenously with ghrelin (3 nmol/rat), after which gastric emptying, food intake, gastroduodenal motility, and growth hormone (GH) release were investigated. Furthermore, plasma ghrelin levels and the expression of ghrelin-related genes in the stomach and hypothalamus were examined. In addition, we administered ghrelin to GERD rats treated with rikkunshito, a Kampo medicine, and examined its effects on gastroduodenal motility. GERD rats showed a considerable decrease in gastric emptying, food intake, and antral motility. Ghrelin administration significantly increased gastric emptying, food intake, and antral and duodenal motility in sham-operated rats, but not in GERD rats. The effect of ghrelin on GH release was also attenuated in GERD rats, which had significantly increased plasma ghrelin levels and expression of orexigenic neuropeptide Y/agouti-related peptide mRNA in the hypothalamus. The number of ghrelin-positive cells in the gastric body decreased in GERD rats, but the expression of gastric preproghrelin and GH secretagogue receptor mRNA was not affected. However, when ghrelin was exogenously administered to GERD rats treated with rikkunshito, a significant increase in antral motility was observed. These results suggest that gastrointestinal dysmotility is associated with impaired ghrelin signaling in GERD rats and that rikkunshito restores gastrointestinal motility by improving the ghrelin response.
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Isotani S, Muto S, Yu J, Nagae M, China T, Koseki T, Kumamoto T, Tokiwa S, Yoshii T, Saito K, Yamaguchi R, Ide H, Horie S. Clinical and safety profiles of bipolar transurethral vaporization of the prostate in saline: a preliminary report. Asian J Endosc Surg 2012; 5:21-4. [PMID: 22776338 DOI: 10.1111/j.1758-5910.2011.00114.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Transurethral vaporization of the prostate in saline (TURisV) is an innovative endoscopic surgical modality for the treatment of benign prostatic hyperplasia (BPH) that vaporizes prostate tissue using a uniquely designed mushroom electrode. TURisV promises instant hemostatic tissue ablation under saline irrigation and offers clinical advantages for endoscopic BPH operations. From July 2008 to February 2009, TURisV was performed in 17 cases with clinically significant BPH. Median operation time was 127.0 min and median volume of vaporized prostate tissue was 41.1 g. Median International Prostate Symptom Score improved from 20 to 4 after 12 months. Median maximum flow rate increased from 5.3 mL/s to 13.8 mL/s after 12 months. Postoperative median residual urine improved from 48.0 mL to 7.0 mL after 12 months. No changes in hemoglobin or electrolyte levels were seen postoperatively. Our results suggest that TURisV is a safe and efficacious treatment for BPH.
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Takeda H, Muto S, Nakagawa K, Ohnishi S, Sadakane C, Saegusa Y, Nahata M, Hattori T, Asaka M. Rikkunshito as a Ghrelin Enhancer. Methods Enzymol 2012; 514:333-51. [DOI: 10.1016/b978-0-12-381272-8.00021-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Takeda SI, Chinda J, Murakami T, Numata A, Iwazu Y, Akimoto T, Hamano Y, Muto S, Takahashi M, Kusano E. Development of features of glomerulopathy in tumor-bearing rats: a potential model for paraneoplastic glomerulopathy. Nephrol Dial Transplant 2011; 27:1786-92. [DOI: 10.1093/ndt/gfr565] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ogawa H, Azuma M, Muto S, Nishioka Y, Honjo A, Tezuka T, Uehara H, Izumi K, Itai A, Sone S. IκB kinase β inhibitor IMD-0354 suppresses airway remodelling in a Dermatophagoides pteronyssinus-sensitized mouse model of chronic asthma. Clin Exp Allergy 2011; 41:104-15. [PMID: 20573155 DOI: 10.1111/j.1365-2222.2010.03564.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Nuclear factor (NF)-κB is a transcription factor that regulates cytokine and chemokine production in various inflammatory diseases, including bronchial asthma. IκB kinase (IKK) β is important for NF-κB activation in inflammatory conditions, and is possibly related to airway remodelling. Thus, inhibition of the IKKβ-NF-κB pathway may be an ideal strategy for the management of airway remodelling. OBJECTIVE We examined the effects of a newly synthesized IKKβ inhibitor, IMD-0354, in a chronic allergen exposure model of bronchial asthma in mice. METHODS A chronic mouse model was generated by challenge with house dust mite antigen (Dermatophagoides pteronyssinus). IMD-0354 was administrated intraperitoneally in therapeutic groups. Lung histopathology, hyperresponsiveness and the concentrations of mediators and molecules in supernatants of lung homogenates were determined. RESULTS NF-κB activation was inhibited by prolonged periods of IMD-0354 administration. IMD-0354 reduced the numbers of bronchial eosinophils. IMD-0354 also inhibited the pathological features of airway remodelling, including goblet cell hyperplasia, subepithelial fibrosis, collagen deposition and smooth muscle hypertrophy. Inhibition of these structural changes by IMD-0354 was the result of the suppressing the production and activation of remodelling-related mediators, such as TGF-β, via inhibition of IKKβ. IMD-0354 inhibited IL-13 and IL-1β production, and it restored the production of IFN-γ. It also ameliorated airway hyperresponsiveness. CONCLUSION IKKβ plays crucial roles in airway inflammation and remodelling in a chronic mouse model of asthma. A specific IKKβ inhibitor, IMD-0354, may be therapeutically beneficial for treating airway inflammation and remodelling in chronic asthma.
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Saegusa Y, Takeda H, Muto S, Nakagawa K, Ohnishi S, Sadakane C, Nahata M, Hattori T, Asaka M. Decreased plasma ghrelin contributes to anorexia following novelty stress. Am J Physiol Endocrinol Metab 2011; 301:E685-96. [PMID: 21712530 DOI: 10.1152/ajpendo.00121.2011] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We hypothesized that anorexia induced by novelty stress caused by exposure to a novel environment may be due to activation of corticotropin-releasing factor (CRF) and subsequently mediated by decreasing peripheral ghrelin concentration via serotonin (5-HT) and melanocortin-4 receptors (MC4R). Each mouse was transferred from group-housed cages to individual cages to establish the novelty stress. We observed the effect of changes in feeding behavior in a novel environment using the method of transferring group-housed mice to individual cages. We investigated the effect of an intracerebroventricular injection of antagonists/agonists of CRF1/2 receptors (CRF1/2Rs), 5-HT(1B)/(2C) receptors (5-HT(1B)/(2C)R), and MC4R to clarify the role of each receptor on the decrease in food intake. Plasma ghrelin levels were also measured. The novelty stress caused a reduction in food intake that was abolished by administering a CRF1R antagonist. Three hours after the novelty stress, appetite reduction was associated with reduced levels of neuropeptide Y/agouti-related peptide mRNA, increased levels of proopiomelanocortin mRNA in the hypothalamus, and a decrease in plasma ghrelin level. Administering a CRF1R antagonist, a 5-HT(1B)/(2C)R antagonist, an MC4R antagonist, exogenous ghrelin, and an enhancer of ghrelin secretion, rikkunshito, resolved the reduction in food intake 3 h after the novelty stress by enhancing circulating ghrelin concentrations. We showed that anorexia during a novelty stress is a process in which CRF1R is activated at the early stage of appetite loss and is subsequently activated by a 5-HT(1B)/(2C)R and MC4R stimulus, leading to decreased peripheral ghrelin concentrations.
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Hisasue SI, Ide H, China T, Isotani S, Muto S, Yamaguchi R, Horie S. Initial experience of low energy shockwaves for the treatment of erectile dysfunction in Teikyo University Hospital, Japan. JOURNAL OF MENS HEALTH 2011. [DOI: 10.1016/j.jomh.2011.08.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Saegusa Y, Takeda H, Muto S, Oridate N, Nakagawa K, Sadakane C, Nahata M, Harada Y, Iizuka M, Hattori T, Asaka M. Decreased motility of the lower esophageal sphincter in a rat model of gastroesophageal reflux disease may be mediated by reductions of serotonin and acetylcholine signaling. Biol Pharm Bull 2011; 34:704-11. [PMID: 21532161 DOI: 10.1248/bpb.34.704] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To elucidate the altered function of the lower esophageal sphincter (LES) in gastroesophageal reflux disease (GERD), we evaluated the motility proximal to LES using force transducers, contraction and relaxation responses to neurotransmitters in LES strips, and gene expression of neurotransmitter receptors in GERD rats. Force transducers were applied to the proximal LES, and contraction of the LES was monitored during free moving. In addition, LES was isolated from sham-operated and GERD rats to investigate the LES function in an organ bath, and to determine gene expression. The in vivo motility proximal to LES (% motility index) in conscious rats was decreased by atropine treatment and increased by cisapride (5-HT(4) receptor agonist) treatment. Acetylcholine- and serotonin (5-HT)-induced LES contraction and sodium nitroprusside-induced relaxation in LES strips of GERD rats markedly decreased compared to sham-operated rats. The mRNA expressions of 5-HT(4) and muscarinic acetylcholine 3 receptors were significantly reduced in esophageal LES strips of GERD rats compared with sham-operated rats. Intraperitoneal administration of cisapride improves the erosive damage in the esophagus in GERD rats. It is suggested that the reduction of 5-HT-induced contraction in LES strips in GERD rats may be partly due to the decrease in 5-HT(4)-receptor activation. The reduction of LES function may be due to the decrease in neurotransmitters signal transduction, leading to the deterioration of histopathological damage in GERD.
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Ide H, Yu J, Lu Y, Muto S, Horie S. 29 Prostate cancer in the aging male. JOURNAL OF MEN'S HEALTH 2011. [DOI: 10.1016/s1875-6867(11)60062-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Masuda T, Murata M, Honma S, Iwazu Y, Sasaki N, Ogura M, Onishi A, Ando Y, Muto S, Shimada K, Kario K, Kusano E, Asano Y. Sleep-disordered breathing predicts cardiovascular events and mortality in hemodialysis patients. Nephrol Dial Transplant 2011; 26:2289-95. [DOI: 10.1093/ndt/gfq756] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Endo N, Sasaki R, Muto S. Pheromonal cross-attraction in true bugs (Heteroptera): attraction of Piezodorus hybneri (Pentatomidae) to its pheromone versus the pheromone of Riptortus pedestris (Alydidae). ENVIRONMENTAL ENTOMOLOGY 2010; 39:1973-1979. [PMID: 22182564 DOI: 10.1603/en10016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigated the attractiveness of a synthetic form of the pheromone of the soybean stink bug, Piezodorus hybneri (Gmelin), under field conditions, and compared it with that of (E)-2-hexenyl (E)-2-hexenoate, a pheromone component of a competitor, Riptortus pedestris (Fabricius). Many adult stink bugs were attracted to traps baited with 100 mg of the synthetic pheromone (1: 1: one mixture of β-sesquiphellandrene, (R)-15-hexadecanolide, and methyl (Z)-8-hexadecenoate), but few were attracted to 1 or 10 mg. More than twice as many females as males were attracted to this male-produced pheromone. None of the individual pheromone components (30 mg) attracted conspecifics. In summer (June-July), when field P. hybneri were not in diapause, (E)-2-hexenyl (E)-2-hexenoate was more attractive to P. hybneri than the synthetic pheromone. The sex ratio of the adults attracted to the synthetic pheromone was highly female-biased, yet almost equal numbers of both sexes were attracted to (E)-2-hexenyl (E)-2-hexenoate. Most females attracted to both attractants were mated and had mature ovaries. However, adults attracted to (E)-2-hexenyl (E)-2-hexenoate were likely to have less food in their stomach than those attracted to the synthetic pheromone. In late autumn (October-November), when the bugs were in reproductive diapause, both attractants attracted many sexually immature female and male adults that had well-developed fat body. The synthetic pheromone also attracted a large number of conspecific nymphs. These results suggest that P. hybneri pheromone and R. pedestris pheromone component, respectively, have different functions for P. hybneri. The male-produced pheromone system of P. hybneri seems to be sex-related but to have other roles.
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Matsuda A, Tanaka A, Muto S, Ohmori K, Furusaka T, Jung K, Karasawa K, Okamoto N, Oida K, Itai A, Matsuda H. A novel NF-κB inhibitor improves glucocorticoid sensitivity of canine neoplastic lymphoid cells by up-regulating expression of glucocorticoid receptors. Res Vet Sci 2010; 89:378-82. [DOI: 10.1016/j.rvsc.2010.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 11/13/2009] [Accepted: 03/08/2010] [Indexed: 01/12/2023]
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Onishi A, Muto S, Homma S, Inaba T, Shuto R, Kusano E, Asano Y. Pseudoaldosteronism with increased serum cortisol associated with pneumonia, hypouricemia, hypocalcemia, and hypophosphatemia. Clin Nephrol 2010; 74:403-408. [PMID: 20979951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
We describe here the interesting case of a 73-year-old hypertensive man with pseudoaldosteronism. He had been taking glycyrrhizin at a dose of 75 mg/day for 12 years because of mild liver damage, but had never experienced any previous symptoms associated with hypokalemia. He was referred to our hospital because of hypokalemic tetraparesis and rhabdomyolysis. At that time, we noted mineralocorticoid excess characterized by hypokalemia due to urinary K loss, exacerbation of hypertension due to increased tubular Na reabsorption, metabolic alkalosis, and suppression of both plasma renin activity and plasma aldosterone concentration. His urinary free cortisol excretion rate and the urinary ratio of free cortisol to free cortisone were markedly elevated. Thus we diagnosed pseudoaldosteronism that was related to the long-term use of glycyrrhizin. When he developed pseudoaldosteronism, he also contracted pneumonia, and exhibited elevated levels of serum cortisol and creatinine clearance (CCr) as well as hypouricemia, hypocalcemia, and hypophosphatemia. All normalized after the recovery from pneumonia and the administration of spironolactone. The extracellular volume expansion associated with increased tubular Na reabsorption by the aldosterone-sensitive distal nephron and the resulting increase in CCr caused an inhibition of proximal tubular reabsorption of uric acid, Ca, and inorganic phosphate, leading to their renal loss and therefore hypouricemia, hypocalcemia, and hypophosphatemia, respectively. In this patient, the increased circulating cortisol associated with the stress of inflammation caused by pneumonia triggered the development of pseudoaldosteronism.
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Takeda H, Muto S, Onishi S, Asaka M. [Role of Kampo medicine in the treatment of dyspepsia and anorexia]. NIHON SHOKAKIBYO GAKKAI ZASSHI = THE JAPANESE JOURNAL OF GASTRO-ENTEROLOGY 2010; 107:1586-1591. [PMID: 20938108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Fujimichi Y, Muto S, Tatsumi K, Kawano T, Yamane H. Quantitative determination of site occupancy of multi-rare-earth elements doped into Ca2SnO4 phosphor by electron channeling microanalysis. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2010.07.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tamura T, Mitsumori K, Muto S, Kasahara H, Kobayashi S, Okuhara Y, Hayashi M, Nagasawa T, Onozato T, Kuroda J. Fifty-two week chronic toxicity of enzymatically decomposed rutin in Wistar rats. Food Chem Toxicol 2010; 48:2312-8. [DOI: 10.1016/j.fct.2010.05.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 04/30/2010] [Accepted: 05/24/2010] [Indexed: 10/19/2022]
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Kawahata K, Peterson BJ, Akiyama T, Ashikawa N, Emoto M, Funaba H, Hamada Y, Ida K, Inagaki S, Ido T, Isobe M, Goto M, Mase A, Masuzaki S, Michael C, Morisaki T, Morita S, Muto S, Nagayama Y, Nakamura Y, Nakanishi H, Sakamoto R, Narihara K, Nishiura M, Ohdachi S, Okajima S, Osakabe M, Sakakibara S, Sanin A, Sasao M, Sato K, Shimizu A, Shoji M, Sudo S, Tamura N, Tanaka K, Toi K, Tokuzawa T, Veshchev EV, Vyacheslavov LN, Yamada I, Yoshinuma M. Overview of LHD Plasma Diagnostics. FUSION SCIENCE AND TECHNOLOGY 2010. [DOI: 10.13182/fst10-a10819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ueno O, Samejima M, Muto S, Miyachi S. Photosynthetic characteristics of an amphibious plant, Eleocharis vivipara: Expression of C(4) and C(3) modes in contrasting environments. Proc Natl Acad Sci U S A 2010; 85:6733-7. [PMID: 16593980 PMCID: PMC282052 DOI: 10.1073/pnas.85.18.6733] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Eleocharis vivipara Link, a freshwater amphibious leafless plant belonging to the Cyperaceae can grow in both terrestrial and submersed aquatic conditions. Two forms of E. vivipara obtained from these contrasting environments were examined for the characteristics associated with C(4) and C(3) photosynthesis. In the terrestrial form (delta (13)C values = -13.5 to -15.4 per thousand, where per thousand is parts per thousand), the culms, which are photosynthetic organs, possess a Kranz-type anatomy typical of C(4) plants, and well-developed bundle-sheath cells contain numerous large chloroplasts. In the submersed form (delta (13)C value = -25.9 per thousand), the culms possess anatomical features characteristic of submersed aquatic plants, and the reduced bundle-sheath cells contain only a few small chloroplasts. (14)C pulse-(12)C chase experiments showed that the terrestrial form and the submersed form fix carbon by way of the C(4) pathway, with aspartate (40%) and malate (35%) as the main primary products, and by way of the C(3) pathway, with 3-phosphoglyceric acid (53%) and sugar phosphates (14%) as the main primary products, respectively. The terrestrial form showed photosynthetic enzyme activities typical of the NAD-malic enzyme-C(4) subtype, whereas the submersed form showed decreased activities of key C(4) enzymes and an increased ribulose 1,5-bisphosphate carboxylase (EC 4.1.1.39) activity. These data suggest that this species can differentiate into the C(4) mode under terrestrial conditions and into the C(3) mode under submersed conditions.
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Ide H, Terado Y, Tokiwa S, Nishio K, Saito K, Isotani S, Kamiyama Y, Muto S, Imamura T, Horie S. Novel Germ Line Mutation p53-P177R in Adult Adrenocortical Carcinoma Producing Neuron-specific Enolase as a Possible Marker. Jpn J Clin Oncol 2010; 40:815-8. [DOI: 10.1093/jjco/hyq045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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