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Shiono Y, Hatakeyama T, Murayama T, Koseki T. Polyketide metabolites from the endophytic fungus Microdiplodia sp. KS 75-1. Nat Prod Commun 2012; 7:1065-1068. [PMID: 22978230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Through our screening for new natural compounds, four new polyketide metabolites, 7,8-dihydonivefuranone A (1), 6(7)-dehydro-8-hydroxyterrefuranone (2), 8-hydroxyterrefuranone (3), and 6-hydroxyterrefuranone (4) were isolated from the fermentation extract of Microdiplodia sp. KS 75-1, together with the known compounds nivefuranones A (5) and B (6); their structures were determined by spectroscopic (NMR, UV and IR) and MS analysis. Compounds 1, 2, 4 and 5 showed antimicrobial activity against Candida albicans and Staphylococcus aureus.
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Akahane T, Nagata M, Matsumoto T, Murayama T, Isaka A, Kameda T, Fujita M, Oana K, Kawakami Y. A case of wound dual infection with Pasteurella dagmatis and Pasteurella canis resulting from a dog bite -- limitations of Vitek-2 system in exact identification of Pasteurella species. Eur J Med Res 2012; 16:531-6. [PMID: 22112359 PMCID: PMC3351896 DOI: 10.1186/2047-783x-16-12-531] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Background Pasteurella species, widely known as indigenous orgganisms in the oral and gastrointestinal floras of many wild and domestic animals, are important pathogens in both animals and humans. Human infections due to Pasteurella species are in most cases associated with infected injuries following animal bites. We encountered a rare case of dual infections caused by different two Pasteurella species occurred in a previously healthy 25-year-old female sustaining injury by a dog-bite. Methodology Exudates from the open wound of her dog-bite site, together with the saliva of the dog were submitted for bacteriological examination. Predominantly appearing grayish-white smooth colonies with almost the same colonial properties but slightly different glistening grown on chocolate and sheep blood agar plates were characterized morphologically by Gram's stain, biochemically by automated instrument using Vitek 2 system using GN cards together with commercially available kit system, ID-Test HN-20 rapid panels, and genetically by sequencing the 16S rRNA genes of the organism using a Taq DyeDeoxy Terminator Cycle Sequencing and a model 3100 DNA sequencer instrument. Results The causative isolates from the dog-bite site were finally identified as P. canis and P. dagmatis from the findings of the morphological, cultural, and biochemical properties together with the comparative sequences of the 16S rRNA genes. Both the isolates were highly susceptible to many antibiotics and the patient was successfully treated with the administration of so-called the first generation cephalosporin, cefazolin followed by so-called the third generation cephalosporin, cefcapene pivoxil. The isolate from the dog was subsequently identified as P. canis, the same species as the isolate from the patient. Conclusions To the best of our knowledge, this was the second report of a dual infection with Pasteurella species consisting of P. dagmatis and P. canis resulting from a dog-bite, followed by the first report of dual infections due to P. dagmatis and P. multocida in 1988. Our isolate finally identified as P. dagmatis was misidentified as P. pneumotripica by means of the Vitek 2 system. The species name "P. dagmatis" was not included in the database of the system. It is also important for routine clinical microbiology laboratories to know the limitation of the automated Vitek 2 system for the accurate identification of Pasteurella species especially P. dagmatis. It should be emphasized that there still exists much room for improvement in Vitek 2 system. Significant improvement of Vitek 2 system especially in the identification of Pasteurella species is urgently desired.
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Murakawa T, Murayama T, Nakajima J, Ono M. Lung lobectomy in a patient with an implantable left ventricular assist device. Interact Cardiovasc Thorac Surg 2011; 13:676-8. [DOI: 10.1510/icvts.2011.281493] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Shimada K, Murayama T, Yokode M, Kita T, Fujita M, Kishimoto C. Olmesartan, a novel angiotensin II type 1 receptor antagonist, reduces severity of atherosclerosis in apolipoprotein E deficient mice associated with reducing superoxide production. Nutr Metab Cardiovasc Dis 2011; 21:672-678. [PMID: 20399087 DOI: 10.1016/j.numecd.2009.12.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Revised: 12/10/2009] [Accepted: 12/31/2009] [Indexed: 10/19/2022]
Abstract
BACKGROUND AND AIM Oxidative stress may play an important role in the development of atherosclerosis. Some angiotensin II type 1 (AT(1)) receptor antagonists have the capacity of reducing oxidative stress in addition to the hemodynamic actions. Accordingly, we assessed the hypothesis that olmesartan, a novel AT(1) receptor antagonist, reduced the severity of atherosclerosis in apolipoprotein (apo) E-deficient mice associated with reducing oxidative stress. METHODS AND RESULTS Atherosclerosis was induced in apo E-deficient mice fed a high fat diet. Mice were intraperitoneally treated with an injection of olmesartan (1mg/kg/day) daily over 8 weeks, and were compared with the untreated controls. Blood pressure was not changed significantly by the olmesartan treatment. Fatty streak plaque developed in apo E-deficient mice, and was suppressed in mice that received olmesartan. In addition, olmesartan reduced not only superoxide production but the overload of oxidative stress in aortic walls. There were no significant differences in serum lipid levels between olmesartan-treated and -untreated groups. In vitro study showed that both olmesartan and its active metabolite RNH-6270, an enantiomer of olmesartan, suppressed interferon-γ, macrophage inflammatory protein-2, and thioredoxin (a marker of oxidative stress) concentrations in cultured cells. CONCLUSION Olmesartan may suppress atherosclerosis via reducing not only superoxide production but also the overload of oxidative stress in this animal model.
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Hayasaka S, Koseki T, Murayama T, Kwon E, Shiono Y. Phenylisobenzofuranones from Fungicolous Nodulisporium sp. SH-1. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2011. [DOI: 10.1515/znb-2011-0915] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Two new phenylisobenzofuranone nodulisporones A (1) and B (2) were isolated from the fungicolous Nodulisporium sp. Their structures were determined by spectroscopic methods. Compound 1 exhibited antimicrobial activity against Candida albicans and Trichoderma harzianum.
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Shiono Y, Kikuchi M, Koseki T, Murayama T, Kwon E, Aburai N, Kimura KI. Isopimarane diterpene glycosides, isolated from endophytic fungus Paraconiothyrium sp. MY-42. PHYTOCHEMISTRY 2011; 72:1400-1405. [PMID: 21612804 DOI: 10.1016/j.phytochem.2011.04.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 02/18/2011] [Accepted: 04/21/2011] [Indexed: 05/30/2023]
Abstract
Six isopimarane diterpenes, compounds 1-6, were isolated from the endophytic fungus Paraconiothyrium sp. MY-42. Compound 1 possesses a 19-glucopyranosyloxy group. Its structure was first elucidated by spectroscopic data analysis and finally confirmed by X-ray crystallography, whereas structures 2-6 were mainly elucidated based on the analysis of spectroscopic evidence. Compounds 2 and 3 showed moderate cytotoxicities against the human promyelocytic leukemia cell line HL60 (IC₅₀ 6.7 μM value for 2 and 9.8 μM for 3).
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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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Arai H, Tamura Y, Murayama T, Minami M, Yokode M. 767 EFFECTS OF VARIOUS LIPID-LOWERING DRUGS ON DIABETIC NEPHROPATHY IN DB/DB MICE. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70768-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hiramatsu F, Murayama T, Koseki T, Funakoshi T, Shiono Y. Cadinane sesquiterpenoids, strobilols L and M, fromStrobilurus ohshimae. Nat Prod Res 2011; 25:781-8. [DOI: 10.1080/14786410902858077] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Jurewicz M, Ueno T, Azzi J, Tanaka K, Murayama T, Yang S, Sayegh MH, Niimi M, Abdi R. Donor antioxidant strategy prolongs cardiac allograft survival by attenuating tissue dendritic cell immunogenicity(†). Am J Transplant 2011; 11:348-55. [PMID: 21182586 DOI: 10.1111/j.1600-6143.2010.03360.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ischemic reperfusion injury (IRI) enhances allograft immunogenicity, worsens transplantation outcome, and is the primary cause of activation of the recipient innate immune response, resulting in subsequent amplification of the alloimmune adaptive response. Here, we aimed at demonstrating that the link between innate injury and alloimmunity occurs predominantly through activation of allograft-derived dendritic cells (ADDC). Perfusion of MCI-186, a free radical scavenger, into donor cardiac allografts prior to transplantation resulted in prolongation of complete MHC-mismatched allograft survival in the absence of immunosuppression (MST of 8 vs. 26 days). This prolongation was associated with a reduction in trafficking of ADDC to recipient lymphoid tissue as well as a reduction in T cell priming. Depleting ADDC with diphtheria toxin (using DTR-GFP-DC mice as donors) 24 h prior to transplant resulted in abrogation of the prolongation observed with MCI-186 treatment, demonstrating that the beneficial effect of MCI-186 is mediated by ADDC. This donor-specific anti-ischemic regimen was also shown to reduce chronic rejection, which represents the primary obstacle to long-term allograft acceptance. These data for the first time establish a basis for donor anti-ischemic strategies, which in the ever-expanding marginal donor pools, can be instituted to promote engraftment.
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Hayasaka S, Koseki T, Murayama T, Kwon E, Shiono Y. Phenylisobenzofuranones from Fungicolous Nodulisporium sp. SH-1. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2011. [DOI: 10.5560/znb.2011.66b0961] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Matsumoto K, Hosoya T, Tashima K, Namiki T, Murayama T, Horie S. Distribution of transient receptor potential vanilloid 1 channel-expressing nerve fibers in mouse rectal and colonic enteric nervous system: relationship to peptidergic and nitrergic neurons. Neuroscience 2010; 172:518-34. [PMID: 20951772 DOI: 10.1016/j.neuroscience.2010.10.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 09/29/2010] [Accepted: 10/11/2010] [Indexed: 12/22/2022]
Abstract
In the gut, transient receptor potential vanilloid (TRPV) 1 activation leads to release of neurotransmitters such as neuropeptides and nitric oxide. However, the distribution of TRPV1 nerve fibers and neurotransmitters released form sensory nerve endings in the enteric nervous system are currently not well understood. The present study investigated the immunohistochemical distribution of TRPV1 channels, sensory neuropeptides, and nitric oxide and their co-localization in mouse large intestine. Numerous TRPV1 and calcitonin gene-related peptide (CGRP) immunoreactivities were detected, mainly in the mucosa, submucosal layer, and myenteric plexus. Abundant substance P (SP), neurokinin A (NKA), and neuronal nitric oxide synthase (nNOS)-immunoreactivity were revealed in muscle layers. Motor function studies of circular and longitudinal muscles found that contractile responses to capsaicin in the rectum were most sensitive among the rectum, and distal, transverse, and proximal colon. Double labeling studies were carried out in horizontal sections of mouse rectum. TRPV1/protein gene product (PGP)9.5 double labeled axons were observed, but PGP9.5 and neuronal nuclear protein immunopositive cell bodies did not express TRPV1 immunoreactivity in the myenteric plexus. In the mucosa, submucosal layer, deep muscular plexus, circular muscle, myenteric plexus and longitudinal muscle layer, TRPV1 nerve fibers were found to contain CGRP, SP and nNOS. SP and NKA were almost entirely colocalized at the axons and cell bodies in all layers. Double labeling with c-Kit revealed that TRPV1 nerve fibers localized adjacent to the interstitial cells of Cajal (ICC). These results suggest that the TRPV1-expressing nerve and its neurotransmitters regulate various functions of the large intestine.
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Shiono Y, Yokoi M, Koseki T, Murayama T, Aburai N, Kimura KI. Allantopyrone A, a new alpha-pyrone metabolite with potent cytotoxicity from an endophytic fungus, Allantophomopsis lycopodina KS-97. J Antibiot (Tokyo) 2010; 63:251-3. [PMID: 20224600 DOI: 10.1038/ja.2010.18] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Koseki T, Mochizuki K, Kisara H, Miyanaga A, Fushinobu S, Murayama T, Shiono Y. Characterization of a chimeric enzyme comprising feruloyl esterase and family 42 carbohydrate-binding module. Appl Microbiol Biotechnol 2009; 86:155-61. [DOI: 10.1007/s00253-009-2224-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2009] [Revised: 08/24/2009] [Accepted: 08/31/2009] [Indexed: 11/24/2022]
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Shiono Y, Nitto A, Shimanuki K, Koseki T, Murayama T, Miyakawa T, Yoshida J, Kimura KI. A new benzoxepin metabolite isolated from endophytic fungus Phomopsis sp. J Antibiot (Tokyo) 2009; 62:533-5. [PMID: 19609290 DOI: 10.1038/ja.2009.65] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sekine N, Ashitani T, Murayama T, Shibutani S, Hattori S, Takahashi K. Bioactivity of latifolin and its derivatives against termites and fungi. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:5707-5712. [PMID: 19499920 DOI: 10.1021/jf900719p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Latifolin (1) and its derivatives were investigated with the aim of confirming the correlation between bioactivity (antitermite and antifungal activity) and chemical structure. Termite mortality in response to the derivatives 2'-O-methyllatifolin (2), latifolin dimethyl ether (4), and latifolin diacetate (5) increased 2-fold compared to compound 1. The mortality rate from 5-O-methyllatifolin (3) was not different from 1. The mass loss (feed consumption by termite) in response to compounds 3-5 was 3 times greater than compound 1, and the mass loss from compound 2 was twice as great as compound 1. The mortality rate from compounds 4 and 5 increased sharply 7 days after initial exposure. In assessing the antifungal activity of these compounds, it was found that the inhibition rates of white- and brown-rot fungi in response to all derivatives were less than that for compound 1. Our findings indicate that the phenolic hydroxyl group at C-5 of the A ring provides antitermite activities (mortality and mass loss). In addition, both C-5 and C-2' phenolic hydroxyl groups in the A and B rings have antifungal activity against white- and brown-rot fungi. In conclusion, the bioactivity of compound 1 depends upon the position of phenolic hydroxyl groups.
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Kusumoto N, Ashitani T, Hayasaka Y, Murayama T, Ogiyama K, Takahashi K. Antitermitic activities of abietane-type diterpenes from Taxodium distichum cones. J Chem Ecol 2009; 35:635-42. [PMID: 19475449 DOI: 10.1007/s10886-009-9646-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2008] [Revised: 04/13/2009] [Accepted: 05/15/2009] [Indexed: 10/20/2022]
Abstract
Eight known abietane-type diterpenes were isolated from the weak acidic fraction of the n-hexane extract from cones of Taxodium distichum, one of the extant, living fossil conifers. They were identified as 6,7-dehydroroyleanone (1), taxodal (2), taxodione (3), salvinolone (4), 14-deoxycoleon U (5), 5,6-dehydrosugiol (6), sandaracopimaric acid (7), and xanthoperol (8). The structures of these compounds were determined by comparison of NMR spectral data with published data. The antitermitic (termicidal and antifeedant) activities of the compounds 1-8 against the subterranean termite, Reticulitermes speratus Kolbe, were evaluated. Compounds 1 and 3 showed potent termicidal activity, and 5 and 8 showed potent antifeedant activity. Compound 1 was found to be one of the representative bioactive compounds in the n-hexane extract of T. distichum cones. Compounds 1-8, with the exception of 7, were oxides of ferruginol (9). Therefore, the presence of various oxidation forms of the abietane-type structure reflects their various bioactivities.
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Shiono Y, Motoki S, Koseki T, Murayama T, Tojima M, Kimura KI. Isopimarane diterpene glycosides, apoptosis inducers, obtained from fruiting bodies of the ascomycete Xylaria polymorpha. PHYTOCHEMISTRY 2009; 70:935-939. [PMID: 19467682 DOI: 10.1016/j.phytochem.2009.03.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Revised: 01/19/2009] [Accepted: 03/18/2009] [Indexed: 05/27/2023]
Abstract
The methanol extract of fruiting bodies of the ascomycete Xylaria polymorpha afforded three isopimarane diterpene glycosides, namely, 16-alpha-D-mannopyranosyloxyisopimar-7-en-19-oic acid (1), 15-hydroxy-16-alpha-D-mannopyranosyloxyisopimar-7-en-19-oic acid (2), and 16-alpha-D-glucopyranosyloxyisopimar-7-en-19-oic acid (3). Their structures were determined by spectroscopic methods and by single-crystal X-ray analysis. They showed cytotoxicity against human cancer cell lines and exhibited IC50 values ranging from 71 to 607 microM. Further studies on the cytotoxicity of these compounds against HL60 cells demonstrated that they induced apoptosis along with typical DNA fragmentation. It was observed that 2 was less active than 1 and 3.
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Adachi T, Aoyagi Y, Kobayashi M, Murayama T, Goto Y, Suzuki H. Effective NOx Reduction in High Boost, Wide Range and High EGR Rate in a Heavy Duty Diesel Engine. ACTA ACUST UNITED AC 2009. [DOI: 10.4271/2009-01-1438] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Shirakawa H, Shimeno T, Koseki T, Shiono Y, Murayama T, Hatakeyama E, Komai M. Adenosine, an identified active component from the Driselase-treated fraction of rice bran, is effective at improving metabolic syndrome in stroke-prone spontaneously hypertensive rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:2558-2564. [PMID: 19292472 DOI: 10.1021/jf803347c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In the present study, we isolated and identified an active component from the Driselase-treated fraction and investigated its effect by acute and chronic oral administration on hypertension, lipid, and glucose metabolism in stroke-prone spontaneously hypertensive rats. The active component was identified as adenosine and improves hypertension after single oral administration. Rats who were 10 weeks old were divided into control and adenosine groups and were administered water or water with adenosine (10 mg/L), respectively, for 3 weeks. Hypertension and plasma lipid, nitric oxide, insulin, leptin, adiponectin levels, and glucose metabolism were significantly improved in the adenosine group. The mRNA expression levels of genes involved in lipid and glucose metabolism were altered in the adenosine group. Single oral administration of adenosine (10 mg/kg body weight) improved hypertension and plasma triglyceride, glucose, and nitric oxide levels 2 h after administration. In conclusion, oral acute and chronic administration of adenosine are beneficial and improve the metabolic syndrome-related disease parameters.
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Murayama T, Inokuchi M, Takagi Y, Yamada H, Kojima K, Kumagai J, Kawano T, Sugihara K. Relation between outcomes and localisation of p-mTOR expression in gastric cancer. Br J Cancer 2009; 100:782-8. [PMID: 19223902 PMCID: PMC2653759 DOI: 10.1038/sj.bjc.6604915] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Revised: 01/08/2009] [Accepted: 01/12/2009] [Indexed: 02/07/2023] Open
Abstract
The mammalian target of rapamycin (mTOR), a Ser/Thr protein kinase that mediates intracellular signalling related to cell growth, proliferation, and differentiation, has received considerable interest as a possible target for cancer treatment. We evaluated the correlation of mTOR expression with clinicopathological features, outcomes, and the expression of Akt, an upstream regulator of mTOR, in gastric cancer. Tumour samples were obtained from 109 patients with gastric adenocarcinomas who underwent a radical gastrectomy. The expressions of phosphorylated mTOR (p-mTOR) and phosphorylated Akt (p-Akt) in the cytoplasm and in the nucleus were analysed by immunohistochemical staining. Cytoplasmic p-mTOR expression positively correlated with the depth of tumour invasion (T1 vs T2-4, P=0.003), involved lymph nodes (P=0.010), and tumour stage (I vs II-IV, P=0.002). In contrast, nuclear p-mTOR expression negatively correlated with these variables (P<0.001,=0.035, and <0.001). Cytoplasmic p-mTOR expression was associated with significantly poorer relapse-free survival (RFS, P=0.037) and overall survival (OS, P=0.024), whereas nuclear p-mTOR expression was associated with better RFS and OS (P=0.029, 0.059). Neither cytoplasmic nor nuclear p-Akt expression was associated with any clinicopathological factor or with survival. Localisation of p-mTOR may play an important role in tumour progression and outcomes in patients with gastric cancer.
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Mokuno K, Kiyosawa K, Sugimura K, Yasuda T, Riku S, Murayama T, Yanagi T, Takahashi A, Kato K. Prognostic value of cerebrospinal fluid neuron-specific enolase and S-100b protein in Guillain-Barré syndrome. Acta Neurol Scand 2009. [DOI: 10.1111/j.1600-0404.1994.tb01628.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Khan MSH, Tawaraya K, Sekimoto H, Koyama H, Kobayashi Y, Murayama T, Chuba M, Kambayashi M, Shiono Y, Uemura M, Ishikawa S, Wagatsuma T. Relative abundance of Delta(5)-sterols in plasma membrane lipids of root-tip cells correlates with aluminum tolerance of rice. PHYSIOLOGIA PLANTARUM 2009; 135:73-83. [PMID: 19121101 DOI: 10.1111/j.1399-3054.2008.01175.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We investigated variations in aluminum (Al) tolerance among rice plants, using ancestor cultivars from the family line of the Al-tolerant and widely cultivated Japonica cultivar, Sasanishiki. The cultivar Rikuu-20 was Al sensitive, whereas a closely related cultivar that is a descendant of Rikuu-20, Rikuu-132, was Al tolerant. These two cultivars were compared to determine mechanisms underlying variations in Al tolerance. The sensitive cultivar Rikuu-20 showed increased permeability of the plasma membrane (PM) and greater Al uptake within 1 h of Al treatment. This could not be explained by organic acid release. Lipid composition of the PM differed between these cultivars, and may account for the difference in Al tolerance. The tolerant cultivar Rikuu-132 had a lower ratio of phospholipids to Delta(5)-sterols than the sensitive cultivar Rikuu-20, suggesting that the PM of Rikuu-132 is less negatively charged and less permeabilized than that of Rikuu-20. We used inhibitors of Delta(5)-sterol synthesis to alter the ratio of phospholipids to Delta(5)-sterols in both cultivars. These inhibitors reduced Al tolerance in Rikuu-132 and its Al-tolerant ancestor cultivars Kamenoo and Kyoku. In addition, Rikuu-132 showed a similar level of Al sensitivity when the ratio of phospholipids to Delta(5)-sterols was increased to match that of Rikuu-20 after treatment with uniconazole-P, an inhibitor of obtusifoliol-14alpha-demethylase. These results indicate that PM lipid composition is a factor underlying variations in Al tolerance among rice cultivars.
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Kondo Y, Morino Y, Fukuda M, Kanaya Y, Miyazaki Y, Takegawa N, Tanimoto H, McKenzie R, Johnston P, Blake DR, Murayama T, Koike M. Formation and transport of oxidized reactive nitrogen, ozone, and secondary organic aerosol in Tokyo. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jd010134] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shiono Y, Hiramatsu F, Murayama T, Koseki T, Funakoshi T. Two Cyathane-Type Diterpenoids from the Liquid Culture of Strobilurus tenacellus. Chem Biodivers 2008; 5:1811-6. [DOI: 10.1002/cbdv.200890170] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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