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Wilson MR, Patel BV, Takata M. S75 Do "clinically relevant" tidal volumes really cause ventilator-induced lung injury in mice? Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054b.75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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52
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Takata M, Nakagomi T, Kashiwamura S, Nakano-Doi A, Saino O, Nakagomi N, Okamura H, Mimura O, Taguchi A, Matsuyama T. Glucocorticoid-induced TNF receptor-triggered T cells are key modulators for survival/death of neural stem/progenitor cells induced by ischemic stroke. Cell Death Differ 2011; 19:756-67. [PMID: 22052192 PMCID: PMC3321616 DOI: 10.1038/cdd.2011.145] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Increasing evidences show that immune response affects the reparative mechanisms in injured brain. Recently, we have demonstrated that CD4(+)T cells serve as negative modulators in neurogenesis after stroke, but the mechanistic detail remains unclear. Glucocorticoid-induced tumor necrosis factor (TNF) receptor (GITR), a multifaceted regulator of immunity belonging to the TNF receptor superfamily, is expressed on activated CD4(+)T cells. Herein, we show, by using a murine model of cortical infarction, that GITR triggering on CD4(+)T cells increases poststroke inflammation and decreases the number of neural stem/progenitor cells induced by ischemia (iNSPCs). CD4(+)GITR(+)T cells were preferentially accumulated at the postischemic cortex, and mice treated with GITR-stimulating antibody augmented poststroke inflammatory responses with enhanced apoptosis of iNSPCs. In contrast, blocking the GITR-GITR ligand (GITRL) interaction by GITR-Fc fusion protein abrogated inflammation and suppressed apoptosis of iNSPCs. Moreover, GITR-stimulated T cells caused apoptosis of the iNSPCs, and administration of GITR-stimulated T cells to poststroke severe combined immunodeficient mice significantly reduced iNSPC number compared with that of non-stimulated T cells. These observations indicate that among the CD4(+)T cells, GITR(+)CD4(+)T cells are major deteriorating modulators of poststroke neurogenesis. This suggests that blockade of the GITR-GITRL interaction may be a novel immune-based therapy in stroke.
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Saigo K, Takenokuchi M, Hiramatsu Y, Tada H, Hishita T, Takata M, Misawa M, Imoto S, Imashuku S. Oxidative Stress Levels in Myelodysplastic Syndrome Patients: Their Relationship to Serum Ferritin and Haemoglobin Values. J Int Med Res 2011; 39:1941-5. [DOI: 10.1177/147323001103900539] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Reactive oxygen species (ROS) and serum ferritin levels are both considered to be important biological factors in the pathogenesis of myelodysplastic syndrome (MDS). This study evaluated the levels of ROS in 40 patients with MDS (19 males and 21 females) using the Free Radical Analytical System, FRAS4, and derivatives of reactive oxygen metabolite kits. The patients' mean age was 67.3 years (range 58–86 years). The sera of 34 (85%) patients exhibited higher levels of oxidative stress than the reference range. There was a positive correlation between ROS levels and serum ferritin levels, and a negative correlation between ROS levels and haemoglobin levels. There was a negative relationship between serum haemoglobin and ferritin levels. The results indicated that iron accumulation or severe anaemia could contribute to oxidative stress in MDS patients. Iron chelation and antioxidant therapy may be suitable for the management of MDS.
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54
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Okuhara Y, Matsubara H, Takata M. Near-infrared reflection from Al-doped ZnO films prepared by multi-target reactive sputtering. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1757-899x/18/9/092018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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55
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Kubota Y, Hori A, Kobayashi TC, Matsuda R, Kindo K, Kato K, Takata M, Kitagawa S. Molecular arrangement and magnetic properties of O 2in the nanoporous materials. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311083784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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56
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Sheu CF, Shih CH, Sugimoto K, Cheng BM, Takata M, Wang Y. Photo-induced metastable low spin state in a iron(II) high-spin complex. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311082304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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57
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Shakudo K, Kifune K, Kubota Y, Matsunaga T, Yamada N, Takata M. Incommensurate structure analyses of Bi-Te and Sb-Te binary system. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311081748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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58
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Yamada I, Tsuchida K, Ohgushi K, Hayashi N, Kim J, Tsuji N, Takahashi R, Nishiyama N, Inoue T, Irifune T, Kato K, Takata M, Takano M. Structural anomaly in a novel iron-based perovskite. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311091768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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59
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Bagautdinov B, Tanaka H, Shih CH, Sugimoto K, Sasaki S, Tashiro K, Takata M. New insights into the polymerization and structural mechanisms of the polydiacetylene DCHD: an X-ray/MEM study. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311099430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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60
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Hagiya K, Mikouchi T, Zolensky ME, Joy K, Ohsumi K, Terada Y, Yagi N, Takata M. Identification of mineral in thin section by energy-scanning X-ray diffraction. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311079505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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61
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Kitano Y, Takata M, Komura Y. High resolution electron microscopy of partial dislocations in the Laves phase structure. J Microsc 2011. [DOI: 10.1111/j.1365-2818.1986.tb02755.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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62
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Bunker N, O'Dea KP, Handy JM, Takata M. Monocyte subset recruitment to the peritoneum following abdominal surgical incision in mice. Crit Care 2011. [PMCID: PMC3066920 DOI: 10.1186/cc9666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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63
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Patel BV, Wilson MR, Takata M. P252 A physiological characterisation of injury, inflammation and resolution in murine aspiration pneumonitis. Thorax 2010. [DOI: 10.1136/thx.2010.151076.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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64
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Waite AC, O'Dea KP, Wilson MR, Takata M. P251 Flow cytometric detection of intracellular activation markers of pulmonary cells during acute lung injury. Thorax 2010. [DOI: 10.1136/thx.2010.151076.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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65
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Wakabayashi K, Wilson MR, O'Dea KP, Takata M. S107 Comparison of high-stretch versus atelectasis in the pathophysiology of ventilator-induced lung injury using the mouse isolated perfused lung. Thorax 2010. [DOI: 10.1136/thx.2010.150946.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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66
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Bertok S, Wilson MR, Morley PJ, de Wildt R, Bayliffe A, Takata M. T2 Blockade of intraalveolar p55 TNF-receptor signalling by a domain antibody decreases inflammation and oedema in an in vivo mouse model of ventilator-induced lung injury. Thorax 2010. [DOI: 10.1136/thx.2010.150896.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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67
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Iwase S, Kondo M, Kuwahara Y, Takata M, Sugenoya J, Mano T. S6-4 Conduction velocity of C-fibers in humans. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60063-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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68
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Miyazaki J, Matsudaira K, Shimizu Y, Itoh M, Nagamine Y, Mori S, Kim JE, Kato K, Takata M, Katsufuji T. Formation of a three-dimensional network of V trimers in A2V13O22 (A=Ba, Sr). PHYSICAL REVIEW LETTERS 2010; 104:207201. [PMID: 20867054 DOI: 10.1103/physrevlett.104.207201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Indexed: 05/29/2023]
Abstract
We found that in A2V13O22 (A=Ba, Sr), which contains a trilayer slab of VO in the sodium-chloride structure with periodically missing ions, the trimerization of V ions occurs at 290 K (A=Ba) and 380 K (A=Sr). V trimers form a three-dimensional network, but some V ions remain untrimerized in these compounds. The suppression of magnetic susceptibility with trimerization and the existence of a Curie tail at low temperatures, together with the result of NMR measurement, indicate that the V trimers are spin singlet, whereas the untrimerized V ions have a magnetic moment; i.e., there is a spontaneous separation between nonmagnetic and magnetic ions in the crystal.
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69
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Svendsen H, Overgaard J, Busselez R, Arnaud B, Rabiller P, Kurita A, Nishibori E, Sakata M, Takata M, Iversen BB. Multipole electron-density modelling of synchrotron powder diffraction data: the case of diamond. Acta Crystallogr A 2010; 66:458-69. [PMID: 20555186 DOI: 10.1107/s0108767310014236] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Accepted: 04/18/2010] [Indexed: 11/11/2022] Open
Abstract
Accurate structure factors are extracted from synchrotron powder diffraction data measured on crystalline diamond based on a novel multipole model division of overlapping reflection intensities. The approach limits the spherical-atom bias in structure factors extracted from overlapping powder data using conventional spherical-atom Rietveld refinement. The structure factors are subsequently used for multipole electron-density modelling, and both the structure factors and the derived density are compared with results from ab initio theoretical calculations. Overall, excellent agreement is obtained between experiment and theory, and the study therefore demonstrates that synchrotron powder diffraction can indeed provide accurate structure-factor values based on data measured in minutes with limited sample preparation. Thus, potential systematic errors such as extinction and twinning commonly encountered in single-crystal studies of small-unit-cell inorganic structures can be overcome with synchrotron powder diffraction. It is shown that the standard Hansen-Coppens multipole model is not flexible enough to fit the static theoretical structure factors, whereas fitting of thermally smeared structure factors has much lower residuals. If thermally smeared structure factors (experimental or theoretical) are fitted with a slightly wrong radial model (s(2)p(2) instead of sp(3)) the radial scaling parameters (kappa' parameters) are found to be inadequate and the ;error' is absorbed into the atomic displacement parameter. This directly exposes a correlation between electron density and thermal parameters even for a light atom such as carbon, and it also underlines that in organic systems proper deconvolution of thermal motion is important for obtaining correct static electron densities.
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70
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Jóvári P, Kaban I, Kohara S, Takata M. Comment on "Formation of large voids in the amorphous phase-change memory Ge2Sb2Te5 alloy". PHYSICAL REVIEW LETTERS 2010; 104:019601-019602. [PMID: 20366401 DOI: 10.1103/physrevlett.104.019601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Indexed: 05/29/2023]
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71
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Handy JM, Scott AJ, Cross AM, Sinha P, OâDea KP, Takata M. HLA-DR expression and differential trafficking of monocyte subsets following low to intermediate risk surgery*. Anaesthesia 2010; 65:27-35. [DOI: 10.1111/j.1365-2044.2009.06161.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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72
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Takata M, Nishibori E, Sakata M. Charge density studies utilizing powder diffraction and MEM. Exploring of high Tc superconductors, C60 superconductors and manganites. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zkri.216.2.71.20335] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The recent progress of the accurate charge density studies by the Maximum Entropy Method(MEM) utilizing X-ray powder diffraction is reviewed with some examples. Results for PrBCO (PrBa2Cu3O7-δ), YBCO (YBa2Cu3O7-δ), C60 superconductors (Rb2CsC60, K2RbC60, Na2RbC60) and the layered manganite, NdSr2Mn2O7, which is well known as colossal magnetoresistive (CMR)-related material, are given. For non-super conductor, PrBCO, it is found in the MEM charge density that there exist directional robes of the charge density from Pr atom toward the O atoms in the CuO2 conduction planes. On the other hand, for a very well known high Tc super conductor, YBCO, appreciable charge densities in the interatomic region around the Y atom is not recognized in the MEM charge density. The distinct difference of the charge densities between PrBCO and YBCO presents clear experimental evidence of the hybridization between Pr(4f)–O(2pπ) orbitals which supports the idea that the hole trapping by the hybridizes states suppresses the superconductivity in PrBCO. The MEM charge densities of the fullerene superconductors, Rb2CsC60, K2RbC60 and Na2RbC60, show distinct structural differences from that of non-superconductors, C60 and Li2CsC60, reflecting the superconducting properties. And the charge deficiencies of the doped metal atoms, which should be associated with charge transfer from the metal atoms to the C60 molecule seems to have strong correlation to the superconducting transition temperature, Tc. As the bigger the charge charge trnsfer, the higher the Tc. In the accurate MEM charge density of antiferromagnetic manganite, NdSr2Mn2O7,the direct imaging of spontaneous ordering of the dx
2-y
2 orbital indicating anisotropic exchange couplings between the local-spins on the Mn sites, which causes an unique layered-type spin order. The theoretical background of the MEM is also mentioned in some detail.
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73
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Lin J, Koga H, Takata M, Saida T. Dermoscopy of pigmented lesions on mucocutaneous junction and mucous membrane. Br J Dermatol 2009; 161:1255-61. [PMID: 19673880 DOI: 10.1111/j.1365-2133.2009.09251.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The dermoscopic features of pigmented lesions on the mucocutaneous junction and mucous membrane are different from those on hairy skin. Differentiation between benign lesions and malignant melanomas of these sites is often difficult. OBJECTIVE To define the dermoscopic patterns of lesions on the mucocutaneous junction and mucous membrane, and assess the applicability of standard dermoscopic algorithms to these lesions. PATIENTS AND METHODS An unselected consecutive series of 40 lesions on the mucocutaneous junction and mucous membrane was studied. All the lesions were imaged using dermoscopy devices, analysed for dermoscopic patterns and scored with algorithms including the ABCD rule, Menzies method, 7-point checklist, 3-point checklist and the CASH algorithm. RESULTS Benign pigmented lesions of the mucocutaneous junction and mucous membrane frequently presented a dotted-globular pattern (25%), a homogeneous pattern (25%), a fish scale-like pattern (18.8%) and a hyphal pattern (18.8%), while melanomas of these sites showed a multicomponent pattern (75%) and a homogeneous pattern (25%). The fish scale-like pattern and hyphal pattern were considered to be variants of the ring-like pattern. The sensitivities of the ABCD rule, Menzies method, 7-point checklist, 3-point checklist and CASH algorithm in diagnosing mucosal melanomas were 100%, 100%, 63%, 88% and 100%; and the specificities were 100%, 94%, 100%, 94% and 100%, respectively. CONCLUSION The ring-like pattern and its variants (fish scale-like pattern and hyphal pattern) are frequently observed as well as the dotted-globular pattern and homogeneous pattern in mucosal melanotic macules. The algorithms for pigmented lesions on hairy skin also apply to those on the mucocutaneous junction and mucous membrane with high sensitivity and specificity.
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Noguchi T, Katsuda S, Kawashiri MA, Nohara A, Kobayashi J, Inazu A, Takata M, Tsuchida M, Tada H, Nakanishi C, Yamagishi M, Mabuchi H. Abstract: P851 PROFILES OF GAIN-OF-FUNCTION PCSK9 E32K MUTATION: INCLUDING PURE HOMOZYGOTE AND COMPOUND HETEROZYGOTE WITH LDLR GENE MUTATION. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70972-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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75
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Tada H, Kawashiri MA, Nakano T, Nakajima K, Takata M, Nohara A, Inazu A, Kobayashi J, Mabuchi H, Yamagishi M. Abstract: P859 IMPACT OF ACCELERATION OF POST-PRANDIAL REMNANT LIPOPROTEIN CLEARANCE IN AUTOSOMAL RECESSIVE HYPERCHOLESTEROLEMIA (ARH). ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70980-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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76
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Shiohara J, Koga H, Uhara H, Takata M, Saida T, Uehara T. Herpes zoster histopathologically mimicking CD30-positive anaplastic large cell lymphoma. J Eur Acad Dermatol Venereol 2009; 23:618-9. [DOI: 10.1111/j.1468-3083.2008.02986.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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77
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Takabayashi Y, Ganin AY, Jeglic P, Arcon D, Takano T, Iwasa Y, Ohishi Y, Takata M, Takeshita N, Prassides K, Rosseinsky MJ. The Disorder-Free Non-BCS Superconductor Cs3C60 Emerges from an Antiferromagnetic Insulator Parent State. Science 2009; 323:1585-90. [DOI: 10.1126/science.1169163] [Citation(s) in RCA: 191] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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78
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Kato K, Moritomo Y, Takata M. Bonding electrons visualization in photo-excited state using synchrotron X-ray powder diffractometry. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308097237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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79
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Tashiro K, Hanesaka M, Yoshizawa Y, Ohhara T, Kurihara K, Kuroki R, Tamada T, Fujiwara S, Ozeki T, Takata M, Sasaki S, Kohara S. First success in direct evaluation of electron density distribution of polymer by X–N method. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730809315x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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80
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Kubota Y, Muroyama N, Yoshimura A, Terasaki O, Ryoo R, Takata M. Gas adsorption process on silica mesoporous crystals obtained by in situSR powder diffraction. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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81
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Takeshi M, Ohsumi H, Takashi K, Sakai S, Arima T, Takahashi I, Nishino Y, Tamasaku K, Tanaka Y, Ishikawa T, Takata M. Flipping ratio in circularly polarized X-ray diffraction. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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82
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Kuroiwa Y, Terado Y, Moriyoshi C, Aoyagi S, Nishibori E, Sakata M, Takata M. Thermal motion of atoms in cubic structure of perovskites and ferroelectric phase transitions. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308095330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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83
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Werner F, Tada K, Ishii A, Ohtsu H, Kim J, Kato K, Takata M, Hasegawa M. Subtle structural differences in the system [Ln(phen/phen- d8) 2(NO 3) 3] (Ln = Eu 3+, Tb 3+). Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308085097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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84
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Aoyagi S, Ina H, Nishibori E, Ohishi Y, Sato M, Takata M, Sakata M. High-pressure and low-temperature charge-density study of Pr1−xCaxCoO3by SR powder diffraction. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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85
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Porcher F, Leclercq-Hugeux F, Lede B, Kato K, Takata M, Hsu IJ. Zeolite-based (guest–host) systems: structure, interactions and optical properties. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308083803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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86
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Hattori K, Fujii K, Itoh K, Kubo H, Miuchi K, Takata M, Tanimori T, Tsuchiya K, Uekusa H. Performance of micro-pixel gas chamber in small-angle X-ray scattering experiments. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308094804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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87
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Takata M, Tanaka H, Kuroiwa Y, Moritomo Y, Kato K, Yoshida F. Electrostatic potential and electric field imaging by MEM powder diffraction data analysis. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308096992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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88
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Uma Devi P, Utsumiz H, Takata M, Takeda S. Enhancement of radiation induced cell death in chicken B lymphocytes by withaferin A. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY 2008; 46:437-442. [PMID: 18697601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Withaferin A (WA), a plant withanolide, has shown significant radiosensitizing effect in vitro and in vivo. Inhibition of DNA repair has been suggested as a mechanism of radiosensitization by WA. To test this, the effect of withaferin A on survival of DT40 chicken B-lymphocyte cell line and its repair deficient single gene mutants Rad54-/-, Ku70-/- and double mutant Ku70-/- /Rad54-/- after irradiation was studied. Exponentially growing cells were treated for 1 hr with 5 microM WA and then exposed to different doses of X-rays. Cell survival was studied by clonogenic assay. WA significantly reduced survival of DT40, Ku70-/- and Ku70-/- /Rad54-/-, but not Rad54-/- cells, suggesting that WA enhances radiosensitivity by interfering with homologous repair, the major pathway of DSB repair in these cells. Inhibition of DNA repair is further indicated in a significant decrease in surviving fraction of DT40 cells by post-irradiation incubation with WA. This could have relevance to cancer radiotherapy.
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Nohara A, Noguchi T, Tada H, Mori M, Tsuchida M, Takata M, Kawashiri M, Inazu A, Kobayashi J, Yamagishi M, Mabuchi H. MAXIMUM LIPID-LOWERING THERAPY FOR FAMILIAL HYPERCHOLESTEROLEMIA: EFFICACY AND SAFETY WITH HIGH-DOSE STATIN, RESIN AND EZETIMIBE. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70830-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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90
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Tanaka H, Furukawa Y, Sone A, Kinugawa K, Kawahara H, Takata M. Intra-arterial Chemotherapy and Concurrent Radiotherapy for Invasive Bladder Cancer. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1058360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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91
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Burioka N, Koyanagi S, Endo M, Takata M, Fukuoka Y, Miyata M, Takeda K, Chikumi H, Ohdo S, Shimizu E. Clock gene dysfunction in patients with obstructive sleep apnoea syndrome. Eur Respir J 2008; 32:105-12. [PMID: 18321934 DOI: 10.1183/09031936.00138207] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Clock genes regulate mammalian circadian rhythms, and dysfunction of clock genes can contribute to various disorders. To investigate whether obstructive sleep apnoea syndrome (OSAS) influences clock gene function, the present authors examined Period1 (Per1) mRNA expression in vitro and in vivo. In eight healthy subjects and eight OSAS patients, plasma noradrenaline, serum interleukin (IL)-6, high-sensitivity C-reactive protein (hsCRP) and Per1 mRNA expression in peripheral whole blood were measured. Expression of Per1 mRNA in cultured cells was examined under IL-6 or noradrenaline stimulation in vitro. After noradrenaline was administered to mice in vivo, Per1 mRNA expression in the brain was examined. The concentrations of serum IL-6, hsCRP and plasma noradrenaline were elevated in OSAS patients, but improved by continuous positive airway pressure (CPAP) therapy. Per1 mRNA expression in the peripheral blood significantly decreased at 02:00 h by CPAP in OSAS patients. Stimulation with IL-6 did not directly induce Per1 mRNA in vitro. Administration of noradrenaline induced Per1 mRNA in the cerebral cortex of mice in vivo. The current study revealed that obstructive sleep apnoea syndrome caused clock gene dysfunction, and continuous positive airway pressure helped to improve it. Sympathetic activation and elevation of the plasma noradrenaline concentration in obstructive sleep apnoea syndrome may be one of the factors involved in disorders of Period1 mRNA expression.
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92
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Yoshioka M, Miwa T, Horii H, Takata M, Yokoyama T, Nishizawa K, Watanabe M, Shinagawa M, Murayama Y. Characterization of a proteolytic enzyme derived from a Bacillus strain that effectively degrades prion protein. J Appl Microbiol 2007; 102:509-15. [PMID: 17241357 DOI: 10.1111/j.1365-2672.2006.03080.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The purpose of this paper was to screen candidate bacterial strains for the production of proteases suitable for application to the degradation of pathogenic forms of prion protein (PrP(Sc)). This paper describes the biochemical characteristics and proteolytic activity of the isolated protease. METHODS AND RESULTS After screening more than 200 bacterial proteases for keratinolytic activity, we identified a Bacillus stain that produced a protease exhibiting high-degradation activity against a scrapie PrP(Sc). Sequence analysis indicated that this serine-protease belonged to the Subtilisin family and had optimum pH and temperature ranges of 9-10 and 60-70 degrees C. Western blotting analysis revealed that the protease was also capable of decomposing bovine spongiform encephalopathy-infected brain homogenate. In addition, the protease was demonstrated to degrade dried PrP(Sc) that had become firmly attached to a plastic surface considerably more effectively than proteinase K or PWD-1, a previously reported keratinase. CONCLUSIONS These results indicate that the isolated protease exhibited higher activity for PrP(Sc) degradation compared with other proteases examined. SIGNIFICANCE AND IMPACT OF THE STUDY This protease could be used under moderate conditions for the decontamination of precision instruments that are susceptible to PrP(Sc) contamination.
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93
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Takata M, Kitao H, Ishiai M. Fanconi anemia: genetic analysis of a human disease using chicken system. Cytogenet Genome Res 2007; 117:346-51. [PMID: 17675877 DOI: 10.1159/000103197] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2006] [Accepted: 10/11/2006] [Indexed: 01/26/2023] Open
Abstract
Fanconi anemia (FA) is a rare hereditary disorder characterized by skeletal abnormalities, bone marrow failure, and an increased incidence of cancer. The basic cellular abnormality in FA has been postulated to lie in the DNA repair mechanisms because cells from FA patients display chromosomal breakage, which is particularly remarkable following induction of DNA crosslinks. However, experimental evidence for this hypothesis has been lacking. To test whether DNA repair is really defective in FA cells, we disrupted several FA genes in chicken B cell line DT40. By measuring efficiency of gene conversion and hypermutation at the Immunoglobulin locus, we have shown that DT40 FA mutant cell lines exhibited defects in homologous DNA recombination, and possibly, translesion synthesis. However, levels of sister chromatid exchange, another important cellular event mediated by HR, were not reduced, possibly indicating the role of FA genes only in a subpathway of HR. Our results indicate that chicken DT40 cells could be highly useful in molecular dissection of basic biochemical processes, which are deficient in a human genetic disorder.
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94
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Takata M, Lin J, Takayanagi S, Suzuki T, Ansai S, Kimura T, Cerroni L, Saida T. Genetic and epigenetic alterations in the differential diagnosis of malignant melanoma and spitzoid lesion. Br J Dermatol 2007; 156:1287-94. [PMID: 17535228 DOI: 10.1111/j.1365-2133.2007.07924.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The histopathological differentiation of malignant melanoma and Spitz naevus often presents diagnostic problems. OBJECTIVES We aimed to find out applicable diagnostic parameters other than routine pathology. METHODS The cases included conventional melanomas and Spitz naevi as well as atypical spitzoid lesions that had posed diagnostic difficulties. We examined hotspots of mutation in the BRAF, NRAS and HRAS genes by polymerase chain reaction-based direct sequencing. We also analysed DNA copy number aberrations and the methylation of CpG sequences in several cancer-related genes by utilizing a novel methylation-specific multiplex ligation-dependent probe amplification method. RESULTS Twenty three of 24 conventional melanomas showed at least one of the genetic and epigenetic alterations examined, although one acral melanoma did not show any alteration. By sharp contrast, 12 Spitz naevi with an unambiguous histopathology showed no or few chromosomal aberrations, no oncogene mutations and no methylation of CpG sequences. Of the 16 ambiguous spitzoid lesions, most of which were designated atypical Spitz tumour by one of the authors, all but one showed no mutations, no methylations and few copy number aberrations. However, three tumours showed copy number loss of the cyclin-dependent kinase inhibitor 2A gene (CDKN2A), an alteration observed frequently in melanomas but not found in conventional Spitz naevi. These results show that, although most atypical Spitz tumours do not differ from conventional Spitz naevi showing virtually no genetic and epigenetic aberrations, some cases may have chromosomal aberrations that include copy number loss of the CDKN2A gene. CONCLUSIONS Genetic and epigenetic analyses may be useful as an additional diagnostic tool to distinguish between melanoma and Spitz naevus, and may help to define subgroups in atypical Spitz tumours.
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Blackbeard J, O'Dea KP, Wallace VCJ, Segerdahl A, Pheby T, Takata M, Field MJ, Rice ASC. Quantification of the rat spinal microglial response to peripheral nerve injury as revealed by immunohistochemical image analysis and flow cytometry. J Neurosci Methods 2007; 164:207-17. [PMID: 17553569 PMCID: PMC2726922 DOI: 10.1016/j.jneumeth.2007.04.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Revised: 04/17/2007] [Accepted: 04/22/2007] [Indexed: 12/29/2022]
Abstract
Microgliosis is implicated in the pathophysiology of several neurological disorders, including neuropathic pain. Consequently, perturbation of microgliosis is a mechanistic and drug development target in neuropathic pain, which highlights the requirement for specific, sensitive and reproducible methods of microgliosis measurement. In this study, we used the spinal microgliosis associated with L5 spinal nerve transection and minocycline-induced attenuation thereof to: (1) evaluate novel software based semi-quantitative image analysis paradigms for the assessment of immunohistochemical images. Microgliosis was revealed by immunoreactivity to OX42. Several image analysis paradigms were assessed and compared to a previously validated subjective categorical rating scale. This comparison revealed that grey scale measurement of the proportion of a defined area of spinal cord occupied by OX42 immunoreactive cells is a robust image analysis paradigm. (2) Develop and validate a flow cytometric approach for quantification of spinal microgliosis. The flow cytometric technique reliably quantified microgliosis in spinal cord cell suspensions, using OX42 and ED9 immunoreactivity to identify microglia. The results suggest that image analysis of immunohistochemical revelation of microgliosis reliably detects the spinal microgliosis in response to peripheral nerve injury and pharmacological attenuation thereof. In addition, flow cytometry provides an alternative approach for quantitative analysis of spinal microgliosis elicited by nerve injury.
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96
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Chi DH, Iwasa Y, Takata M. Bonding nature and structural phase transition in fullerene based nanomaterials. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2006; 6:3888-92. [PMID: 17256347 DOI: 10.1166/jnn.2006.667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Rare-earth-metal-doped fullerides with a nominal composition of R3C70 (R = Sm, Eu, Yb) adopt a pseudomonoclinic structure in which C70 dimers glued with rare-earth ions are involved. High-temperature powder X-ray diffraction experiments revealed that the dimers undergo reversible first-order structural phase transitions, associated with reduction of the unit cell volume, similar to the results observed in previous high-pressure experiments. Structural analyses showed that C70 molecules are realigned to form closely packed structures, causing a reduction of volume at high temperature. The derived charge density map indicates that the transitions can be regarded as reversible structural changes from fullerene dimers to monomers. These features are ascribed to the unique bonding nature of rare-earth C70 compounds.
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Yoshida A, Suzuki H, Tanaka M, Takahashi A, Seida K, Takata M. P-208. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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98
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Murayama Y, Yoshioka M, Horii H, Takata M, Miura K, Shinagawa M. Specific detection of prion antigenic determinants retained in bovine meat and bone meal by flow microbead immunoassay. J Appl Microbiol 2006; 101:369-76. [PMID: 16882144 DOI: 10.1111/j.1365-2672.2006.02944.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS The purpose of this study was to develop an effective method for detecting prion (PrP) antigenic determinants remaining in bovine meat and bone meal (MBM) using pressurized fluid extraction (PSE) equipment and flow microbead immunoassay (FMI). METHODS AND RESULTS Using the FMI, bovine recombinant PrP could be determined quantitatively in the 7 pmol-7 nmol range using anti-PrP peptide polyclonal antibody-coupled microbeads and anti-PrP monoclonal antibody (SAF61) as a detection antibody. PSE extraction at 120 degrees C for 5 min under high pressure was most effective for eluting PrP determinants from bovine MBMs. The FMI was capable of detecting PrP determinants in bovine MBM extracts with high specificity and indicated that the MBMs contained high levels of PrP determinants. This assay was also applied to the detection of PrP(Sc) determinants in bovine MBM spiked with a scrapie-infected brain at a weight ratio of 50 : 1. CONCLUSIONS These data indicate that this assay was effective for the specific detection of PrP determinants contained in bovine MBM extracts. SIGNIFICANCE AND IMPACT OF THE STUDY To our knowledge, this is the first report detailing the detection of PrP determinants in bovine MBM. The assay could be applied to securing the safety of bovine MBM.
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Yashiki N, Saito H, Imagawa T, Takata M, Niwa H, Masuda S. [Right atrial blood cyst; report of a case]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2006; 59:238-40. [PMID: 16528999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A 53-year-old female was admitted to our hospital for examination of an abnormal shadow on chest X-ray. Computed tomography (CT) revealed a large mass of 3 cm in diameter in the right atrium. The mass arose from the right atrial septum and was removed with the interatrial septum. Histological specimen showed a blood cyst contained serous effusion.
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100
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Nohara A, Tsuchida M, Takata M, Katsuda S, Miwa K, Kawashiri M, Inazu A, Kobayashi J, Koizumi J, Mabuchi H. Tu-P8:321 RXR-gamma and FXR variants affect serum cholesterol levels mainly through lipoprotein lipase levels. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81024-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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