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Mizukami M, Zhong G, Fukuchi I, Zhang L, Kurihara K. In situpolymerization of molecular macroclusters on silica: poly( N-isopropylacrylamide) nano-films. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081981] [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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Nakano S, Mizukami M, Kurihara K. Resonance shear measurement on liquid crystal confined between solid surfaces under electric field. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082275] [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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Tadokoro M, Ohhara T, Ohhata Y, Yonamine R, Tanaka I, Kurihara K, Yamamuro O, Ryota K. Dynamics phase transition of water nanotube cluster stabilized in molecular nanoporous crystal. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082688] [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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54
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Shinozaki K, Hayashi S, Wakiya N, Kiguchi T, Tanaka J, Ishizawa N, Sato K, Kondo M, Kurihara K. Fabrication and optical properties of Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) thin films on Si substrates using the PLD method. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2008; 55:1023-1028. [PMID: 18519205 DOI: 10.1109/tuffc.2008.749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Epitaxial 0.67Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3)-0.33PbTiO(3) (PMN-PT) thin films with electro-optic effects were fabricated on (PMN-PT) thin films with electro-optic effects were fabricated on (La0(0.5)Sr0(0.5))CoO(3) (LSCO)/CeO(2)/YSZ-buffered Si(001) substrates using double-pulse excitation pulsed laser deposition (PLD) method with a mask placed between the target and the substrate. Epitaxial growth of PMN-PT thin films was undertaken using the two-step growth method of PMN-PT film. The PMN-PT seed layer was deposited at 500 degrees C on the LSCO/CeO(2)/YSZ/Si, which temperature was the same as that used for LSCO deposition. The PMN-PT thin films were deposited on the PMN-PT seed layer at 600 degrees C, which enables growth of high-crystallinity PMN-PT films with smooth surfaces. We obtained optimum fabrication conditions of PMNPT film with micrometer-order thickness. Resultant films showed high crystallinity with full width at half maximum (FWHM) = 0.73 deg and 1.6 mum thickness. Electro-optic properties and the refractive index value were measured at 633 nm wavelength using the prism coupling method. The obtained refractive index was 2.59. The electro-optic coefficients r(13) and r(33) were determined by applying the electrical field between a semitransparent, thin top electrode of Pt and a bottom LSCO electrode. The electro-optic coefficient was r(13) = 17 pm/V at transverse electric field (TE) mode and r(33) = 55 pm/V at transverse magnetic field (TM) mode.
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Chung KS, Kado S, Woo HJ, Seo YJ, Shikama T, Scotti F, Choi GS, Kurihara K, Kuwahara Y, Lee MJ, Lho T, Tanaka S. Measurement of Density Profiles with Pressure in MAP-II and DiPS Linear Devices. FUSION SCIENCE AND TECHNOLOGY 2007. [DOI: 10.13182/fst07-a1316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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56
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Enomoto Y, Takamasu T, Nakazawa M, Kurihara K, Minami M, Saito H, Okayama Y. Increase of Amphiregulin Level in Sputum during Exacerbation of Acute Asthma Attacks in Children. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yonekawa I, Sueoka M, Hosoyama H, Kawamata Y, Suzuki T, Kurihara K. Advanced data handling for plasma profile control in JT-60. FUSION ENGINEERING AND DESIGN 2006. [DOI: 10.1016/j.fusengdes.2006.04.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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59
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Kurihara K, Yonekawa I, Kawamata Y, Sueoka M, Hosoyama H, Sakata S, Ohshima T, Sato M, Kiyono K, Ozeki. T. Status and prospect of JT-60 plasma control and diagnostic data processing systems for advanced operation scenarios. FUSION ENGINEERING AND DESIGN 2006. [DOI: 10.1016/j.fusengdes.2006.04.058] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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60
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Sata N, Shiozawa M, Suzuki A, Kurihara K, Ohki J, Nagai H. Retroperitoneal hand-assisted laparoscopic surgery for endoscopic adrenalectomy. Surg Endosc 2006; 20:830-3. [PMID: 16544074 DOI: 10.1007/s00464-005-0450-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2005] [Accepted: 12/27/2005] [Indexed: 01/22/2023]
Abstract
Although hand-assisted laparoscopic surgery (HALS) is very common in various laparoscopic procedures, it is rarely used for retroperitoneal endoscopic adrenalectomy because of the small working area. The authors evaluate HALS in endoscopic adrenalectomy with respect to its use as a rescue procedure in complicated cases. In their department, 47 patients underwent endoscopic adrenalectomies between 1998 and 2004. Mainly because of complicated anatomy, three primary aldosteronism cases were converted to retroperitoneal HALS. This involved making an additional 6 cm skin incision, into which the surgeon's left hand was inserted, with the palm used to create a sufficient visual field and working area. The fingers were used for tactile sensation and blunt resection. For these three cases, successful retroperitoneal HALS in endoscopic adrenalectomy resulted in no mortality or morbidity. These findings indicate that this procedure is a feasible technique for complicated benign adrenal tumor cases.
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Niimura N, Arai S, Kurihara K, Chatake T, Tanaka I, Bau R. Recent results on hydrogen and hydration in biology studied by neutron macromolecular crystallography. Cell Mol Life Sci 2006; 63:285-300. [PMID: 16389451 DOI: 10.1007/s00018-005-5418-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Neutron diffraction provides an experimental method of directly locating hydrogen atoms in proteins, a technique complimentary to ultra-high-resolution [1, 2] X-ray diffraction. Three different types of neutron diffractometers for biological macromolecules have been constructed in Japan, France and the United States, and they have been used to determine the crystal structures of proteins up to resolution limits of 1.5-2.5 A. Results relating to hydrogen positions and hydration patterns in proteins have been obtained from these studies. Examples include the geometrical details of hydrogen bonds, H/D exchange in proteins and oligonucleotides, the role of hydrogen atoms in enzymatic activity and thermostability, and the dynamical behavior of hydration structures, all of which have been extracted from these structural results and reviewed. Other techniques, such as the growth of large single crystals, the preparation of fully deuterated proteins, the use of cryogenic techniques, and a data base of hydrogen and hydration in proteins, will be described.
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Tsuchiya K, Akiba M, Azechi H, Fujii T, Fujita T, Fujiwara M, Hamamatsu K, Hashizume H, Hayashi N, Horiike H, Hosogane N, Ichimura M, Ida K, Ikeda Y, Imai T, Inoue N, Ishida S, Itoh S, Kamada Y, Kawashima H, Kikuchi M, Kimura A, Kizu K, Kubo H, Kudo Y, Kurihara K, Kurita G, Kuriyama M, Masaki K, Matsukawa M, Matsuoka M, Miura Y, Miura Y, Miya N, Morioka A, Nakamura K, Ninomiya H, Nishimura A, Okano K, Okuno K, Sagara A, Sakamoto M, Sakurai S, Sato K, Shimada R, Shimizu A, Suzuki T, Takahashi H, Takase Y, Takechi M, Tamai H, Tanaka S, Tsutsui H, Uesugi Y, Yatsu K, Yoshida N. Engineering design and control scenario for steady-state high-beta operation in National Centralized Tokamak. FUSION ENGINEERING AND DESIGN 2006. [DOI: 10.1016/j.fusengdes.2005.08.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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63
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Sata N, Kurihara K, Koizumi M, Tsukahara M, Yoshizawa K, Nagai H. CT virtual pancreatoscopy: a new method for diagnosing intraductal papillary mucinous neoplasm (IPMN) of the pancreas. ACTA ACUST UNITED AC 2005; 31:326-31. [PMID: 16333703 DOI: 10.1007/s00261-005-0359-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2005] [Accepted: 05/04/2005] [Indexed: 11/28/2022]
Abstract
BACKGROUND We sought to validate computed tomographic virtual pancreatoscopy (CT-VP) created by multidetector row CT (MD-CT) in the clinical diagnosis of intraductal papillary mucinous neoplasm (IPMN) of the pancreas. METHODS Five cases of pancreatic IPMNs were included in this study. A nasopancreatic drainage tube was inserted and the pancreatic duct was filled with contrast medium, after which an upper abdominal scan was performed by MD-CT. CT-VP and three-dimensional (3D) CT pancreatographic images were created using a workstation and compared with images by conventional diagnostic techniques. All cases were evaluated by endoscopic retrograde pancreatography (ERP) and three cases of main duct type were assessed by intraoperative real pancreatoscopy (RP). RESULTS In the main duct cases, papillary projections in the main pancreatic duct and branch orifices were clearly detected by CT-VP. These lesions and structures were confirmed by intraoperative RP, and the CT-VP images were clearer than RP images. In branch cases, a surface-rendering method allowed protruding lesions to be clearly detected in the dilated branches. CONCLUSION Compared with conventional ERP or RP, CT-VP and 3D-CT pancreatographic images were finer in quality, and the procedures were less invasive, faster, and less expensive. The potential shown by CT-VP with 3D-CT pancreatography in the clinical diagnosis of pancreatic IPMNs suggests that this approach may replace ERP in the near future.
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Kuroki R, Chatake T, Kurihara K, Ohhara T, Umino H, Cachau RE, Blaber M, Niimura N. Hydrogen and hydration database for bio-macromolecules (HHDB). Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305080049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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65
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Kurihara K, Mizukami M, Endo S. Hydrogen-bonded structure of alcohols adsorbed on silica surface in cyclohexane. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305082632] [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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66
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Obayashi K, Kurihara K, Okano Y, Masaki H, Yarosh DB. L-Ergothioneine scavenges superoxide and singlet oxygen and suppresses TNF-alpha and MMP-1 expression in UV-irradiated human dermal fibroblasts. Int J Cosmet Sci 2005. [DOI: 10.1111/j.0142-5463.2005.00265_2.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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67
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Tanaka I, Ozeki T, Ohhara T, Kurihara K, Niimura N. Single Crystal Pulsed Neutron Diffractometer for Biologically Important Materials Crystallography No.1 (BIX-P1) at Material and Life Science Facility in J-PARC. JOURNAL OF NEUTRON RESEARCH 2005. [DOI: 10.1080/10238160412331297827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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68
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Okura N, Kurihara K, Yasuzumi F. Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges connecting spermatogenic cells in the black snail, Semisulcospira libertina (Mollusca, Mesogastropoda). Tissue Cell 2005; 37:75-9. [PMID: 15695179 DOI: 10.1016/j.tice.2004.10.001] [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] [Received: 04/01/2004] [Revised: 10/14/2004] [Accepted: 10/21/2004] [Indexed: 11/29/2022]
Abstract
Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges between spermatogenic cells are described in the black snail, Semisulcospira libertina. The bundles were occasionally observed in bridges connecting spermatogonia, spermatocytes and typical spermatids. Relations between bundles and centrioles could not be detected. The bundle had electron dense cross bands with a periodicity of approximately 200 nm, and attached to the membrane with almost right angle at the cross linker level. Phalloidin cytochemistry revealed that the bundle contained F-actin. In a case, a bundle connected two cytoplasmic bridges.
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69
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Yokoyama Y, Aonuma K, Yamauchi Y, Kumagai K, Sekiguchi Y, Kurihara K, Tanaka Y, Satoh A, Takahashi A. P-180 Ventricular fibrillationinduction methods without conscious sedation in patients with implantable cardioverter defibrillator. Europace 2003. [DOI: 10.1016/eupace/4.supplement_2.b109-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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71
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Kurihara K, Nakanishi N. Regulation of Na,K-ATPase by cAMP-dependent protein kinase anchored on membrane via A-kinase anchoring protein subtype, AKAP-150, in rat parotid gland. Ann N Y Acad Sci 2003; 986:636-8. [PMID: 12763907 DOI: 10.1111/j.1749-6632.2003.tb07271.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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72
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Kinjo T, Kamiyama K, Chinen K, Iwamasa T, Kurihara K, Hamada T. Squamous metaplasia induced by transfection of human papillomavirus DNA into cultured adenocarcinoma cells. Mol Pathol 2003; 56:97-108. [PMID: 12665627 PMCID: PMC1187300 DOI: 10.1136/mp.56.2.97] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND/AIM It has been reported previously in cases of adenosquamous carcinoma of the lung in Okinawa, a subtropical island 2000 km south of mainland Japan, that the squamous cell carcinoma components were positive for human papillomavirus (HPV) by non-isotopic in situ hybridisation (NISH). The adenocarcinoma cells adjacent to the squamous cell carcinoma components were enlarged and also positive for HPV. This is thought to indicate that after adenocarcinoma cells are infected with HPV, they undergo morphological changes, and that "squamous metaplasia" follows. In this present study, the effects of HPV transfection into adenocarcinoma cells were examined. The relation between the region expressing the HPV gene and squamous metaplasia was also studied. METHODS Plasmid pBR322 containing HPV type 16 (HPV-16) was transfected into cultured colonic adenocarcinoma (DLD-1) and lung adenocarcinoma (PC-14) cells using the calcium phosphate method. Neomycin was used as a selection marker. The presence of HPV E1, E2, E4, E5, E6, E7, L1, and L2 mRNAs and also transglutaminase 1, involucrin, cyclin dependent kinases (CDKs), cyclins, caspases, apoptosis inducing factor, DNase gamma, Fas, and Fas ligand mRNAs in HPV transfected cells was investigated by means of reverse transcription polymerase chain reaction (RT-PCR). The G0-G1 cell population was analysed by flow cytometry. Morphological examination under light and electron microscopes was also carried out. RESULTS The virus transfected cells showed squamous metaplasia when they were injected into severe combined immunodeficient mice, expressing the high molecular weight keratin (Moll's number 1 keratin) and involucrin molecules immunohistochemically, and involucrin and transglutaminase I mRNAs by RT-PCR. The squamous metaplasia was most conspicuous in the HPV transfected DLD-1 cell when compared with HPV transfected PC-14 cells. Squamous metaplasia was most clearly demonstrated in one HPV transfected DLD-1 cell clone, which expressed not only E2 but also E6-E7 fusion gene mRNA. Viral L1 mRNA expression was absent in HPV transfected cell clones, and was not related to squamous metaplasia. The growth rate of HPV transfected cells was reduced. Transfection of the virus into the cultured adenocarcinoma cells increased the G0-G1 cell population greatly, as assessed by flow cytometer analysis. Furthermore, in the virus transfected cells, apoptosis was also observed by means of the terminal deoxynucleotidyl transferase mediated dUTP biotin nick end labelling method. CONCLUSION HPV transfection into adenocarcinoma cells induced clear squamous metaplasia. One of the HPV transfected cell clones that expressed E2 and E6-E7 fusion gene mRNA showed the squamous metaplasia particularly clearly, and apoptosis was also demonstrated.
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Nakamura S, Matsushita H, Nagai T, Sugie H, Furukawa M, Kurihara K. DNA analysis of ABO blood group system detected by single-base nucleotide substitutions in a paternity case. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0531-5131(02)00503-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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74
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Yonekawa I, Kawamata Y, Totsuka T, Akasaka H, Sueoka M, Kurihara K, Kimura T. JT-60 Control System. FUSION SCIENCE AND TECHNOLOGY 2002. [DOI: 10.13182/fst02-a244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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75
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Takamura N, Kurihara K, Yamashita S, Kondo M. Need for measurement of porphyrins in teardrops in patients with congenital erythropoietic porphyria. Br J Ophthalmol 2002; 86:1188. [PMID: 12234907 PMCID: PMC1771311 DOI: 10.1136/bjo.86.10.1188] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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76
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Matsushita H, Nakamura S, Nagai T, Nakamura M, Sugie H, Furukawa M, Komuro T, Kurihara K. Allele frequencies of dinucleotide repeat marker loci on the X chromosome in the Japanese population. Forensic Sci Int 2002; 129:134-6. [PMID: 12243884 DOI: 10.1016/s0379-0738(02)00229-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The allele frequencies of 18 dinucleotide repeat marker loci on the X chromosome have been analyzed in 130 Japanese individuals living in Kanagawa by means of multiplex PCR and the ABI PRISM Linkage Mapping Set MD 10 Panel 28, followed by capillary electrophoresis using the ABI PRISM 310 Genetic Analyzer.
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Miyazaki N, Kurihara K, Nakano H, Shinohara K. Role of ATP in the sensitivity to heat and the induction of apoptosis in mammalian cells. Int J Hyperthermia 2002; 18:316-31. [PMID: 12079587 DOI: 10.1080/02656730210123552] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Heat-induced cell death and apoptosis were studied with respect to intracellular ATP. Studies on the relationship between hyperthermic cell-killing at 44 degrees C and cellular ATP levels in four cell lines grown as monolayers and six cell lines grown in suspension showed good correlations between cellular ATP levels and the sensitivity to heat. D(0) values (the dose required to reduce survival in the linear portion of the response by 63%) linearly increased with an increase in cellular ATP levels. No such changes in sensitivity to heat were observed between the cells cultured at different cell densities, regardless of the change in the cellular ATP level. These results suggest that cellular intrinsic ability to supply ATP rather than the level of pooled ATP per se is responsible for the thermal response. Heat-induced apoptosis in L5178Y cells was observed following treatment at 42 degrees C for 70 min, 44 degrees C for 20 min or 47 degrees C for 3 min, which corresponded to surviving fractions of 25, 0.6 and 0.8%, respectively, but not at 47 degrees C for 20 min, indicating that mild heat shock induced apoptosis. 2-deoxyglucose (2DG) and 2,4-dinitrophenol (DNP) increased the sensitivity to heat and affected the mode of cell death. Cells treated with 2DG and DNP (2DG/DNP) were heated at 42 degrees C for 20 min, and then incubated at 37 degrees C for up to 2h in the presence or absence of 2DG/DNP. In the absence of 2DG/DNP, the cellular ATP level recovered to 76% of the control level and DNA ladder formation was observed, whereas in the presence of 2DG/DNP, the cellular ATP level was further decreased (3-7% of the control) and no DNA fragmentation was detected. These results suggest that the inhibition of ATP synthesis is closely associated with the enhancement of sensitivity to heat and that ATP is required for the induction of apoptosis.
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Tanaka I, Kurihara K, Chatake T, Niimura N. A high-performance neutron diffractometer for biological crystallography (BIX-3). J Appl Crystallogr 2002. [DOI: 10.1107/s0021889801017745] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
A high-performance neutron diffractometer for biological crystallography (BIX-3) has been constructed at JRR-3M in the Japan Atomic Energy Research Institute (JAERI) in order to determine the hydrogen-atom positions in biological macromolecules. It uses several recent technical innovations, such as a neutron imaging plate and an elastically bent silicon monochromator developed by the authors. These have made it possible to realise a compact vertical arrangement of the diffractometer. Diffraction data have been collected from the proteins rubredoxin and myoglobin in about one month, to a resolution of 1.5 Å. The data were good enough to identify the hydrogen atoms with high accuracy. By adopting a crystal-step scan method for measuring Bragg diffraction intensities, the signal-to-noise ratio was much better than that of the Laue method. This shows that BIX-3 is one of the best-performing machines for neutron protein crystallography in the world today.
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Tabata Y, Iizuka Y, Kashiwa J, Masuda NT, Shinei R, Kurihara K, Okonogi T, Hoshiko S, Kurata Y. Fungal metabolites, PF1092 compounds and their derivatives, are nonsteroidal and selective progesterone receptor modulators. Eur J Pharmacol 2001; 430:159-65. [PMID: 11711027 DOI: 10.1016/s0014-2999(01)01382-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The potential of new nonsteroidal progesterone receptor ligands, the derivatives of PF1092C ((4aR,5R,6R,7S)-6,7-dihydroxy-4a,5,6,7-tetrahydro-3,4a,5-trimethylnaphtho[2,3-b]furan-2(4H)-one) discovered from fungal metabolites, was evaluated. PF1092A ((4aR,5R,6R,7S)-6-acetoxy-7-hydroxy-4a,5,6,7-tetrahydro-3,4a,5-trimethylnaphtho[2,3-b]furan-2(4H)-one) showed good and moderate affinity for porcine and human progesterone receptors in in vitro receptor binding assays, respectively, and partial agonist activity for the progesterone receptor, as determined in assays of two types of progesterone-dependent enzymes in human mammary carcinoma T47D cells. The derivative of PF1092C, CP8481, ((4aR,5R,6R,7S)-6-(2-furancarbonyloxy)-7-hydroxy-4a,5,6,7-tetrahydro-3,4a,5-trimethylnaphtho[2,3-b]furan-2(4H)-one) possessed better affinity for both progesterone receptors and showed less cross-reactivity for other steroid receptors, such as rat androgen receptor, human glucocorticoid receptor, and human estrogen receptor, and was a more potent modulator of the progesterone receptor than PF1092A. CP8400 ((4aR,5R,6R,7S)-6,7-diacetoxy-4a,5,6,7-tetrahydro-3,4a,5-trimethylnaphtho[2,3-b]furan-2(4H)-one) and CP8401 ((4aR,5R,6R,7S)-6,7-dipropionyloxy-4a,5,6,7-tetrahydro-3,4a,5-trimethylnaphtho[2,3-b]furan-2(4H)-one), other derivatives, were indicated to be progesterone receptor antagonists. These results suggest that PF1092 compounds can serve as a new pharmacophore for potent and specific nonsteroidal progesterone receptor modulators.
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Kamo N, Muratsugu M, Kurihara K, Kobatake Y. Change in surface charge density and membrane potential of intact mitochondria during energization. FEBS Lett 2001; 72:247-50. [PMID: 16386033 DOI: 10.1016/0014-5793(76)80979-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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81
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Tari A, Asaoku H, Tani H, Kashiwado K, Kurihara K, Fujihara M, Yoshino T. [Evaluation of non-surgical therapy for the malignant lymphomas located mainly in the stomach and duodenum]. NIHON SHOKAKIBYO GAKKAI ZASSHI = THE JAPANESE JOURNAL OF GASTRO-ENTEROLOGY 2001; 98:1154-63. [PMID: 11680989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
We evaluated the effects of the conservative treatment to 29 patients with non-Hodgkin lymphomas located mainly in stomach and duodenum. We could induce complete remission in all the cases of stage I, II, and III including MALT lymphomas by the combination therapy of Helicobacter pylori (H. pylori) eradication, chemotherapy, and radiation, and the complete remission persisted in all except for the three cases who died of other causes. Even in stage IV lymphomas mainly located in stomach and duodenum, we could induce complete remission in 50% of them. Considering the quality of life of patients with lymphomas located mainly in stomach and duodenum, the conservative treatment may be of benefit more than the surgical approach.
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Niimura N, Kurihara K, Ataka M. Dissolution rate of hen egg-white lysozyme crystal under microgravity. UCHU SEIBUTSU KAGAKU 2001; 15 Suppl:S176. [PMID: 11799256 DOI: 10.2187/bss.15.s176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Protein crystallization under micro gravity has been already tried many times in the United States and other countries, and it is reported that about 20% of proteins were better crystallized under microgravity than on earth. This verified that microgravity is sometimes effective in protein crystallization. However, if these procedures continued to be carried out without clarifying which processes are effective, improved development of protein crystallization cannot be expected. The most effective way to study the process is to carry out protein crystallization experiments, each elementary stage of which is clearly observed. To this end, the dissolution rate of a single crystal of hen egg-white lysozyme has been measured both under microgravity and on earth in order to study the mechanism of protein crystallization. In May 1997, we had an opportunity to have an experiment on protein crystallization with use of STS-84 space shuttle missions (the time duration of which was 210 hours). The apparatus for protein crystallization by vapor diffusion techniques was available and we have tried to use it for measurement of crystal dissolution rate under microgravity. The barrels of two syringes (20 ml x 2) were filled with unsaturated protein solutions (hen egg-white lysozyme (HEWL): 0.0wt%, 0.1wt%, 0.2wt%, 0.3wt%; NaCl 3wt% aqueous solution) and a crystal (HEWL: tetragonal form; 1 mm +/- 0.2 mm in diameter) was put on the bottom of the one syringe. Dissolution of the crystal was started by extruding the unsaturated solutions onto the syringe tip with the crystal. The crystal dissoluted in 40 ml droplets that are extruded from syringes. The temperature was kept at 20 degrees C. Just before the Space Shuttle begins returning to the earth, the protein solution was withdrawn back into the syringes by the astronaut, and the melting experiment was finished. In the one syringe the incompletely melted crystal was withdrawn as well. The solution concentration in the other syringe was measured. In the flight experiment, only the initial and final solution concentrations can be measured. In the control experiment on earth the solution concentrations in the course of dissolution were also measured. 20 undersaturated solutions (40 ml in volume) were prepared and a crystal (1 mm +/- 0.2 mm in diameter) was put in each solution. The solution concentration was measured at constant time intervals. When the crystal starts to dissolute [correction of dissolue], molecules in the crystal surface leave the crystal, the concentration around the crystal becomes high and there occurs a radial concentration gradient centered on the nucleus. Molecules diffuse along the gradient and go farther from the crystal. On earth, the concentration gradient might be disturbed by convection and the high concentration around the crystal might be disturbed more quickly than under microgravity. We might therefore expect that dissolution rate on the ground should be larger than under micro-gravity. However, our experimental results show that the expectation was not correct. What might the reason be? One possible reason is that there might be Marangoni convection effects in the apparatus for protein crystallization by vapor diffusion techniques used for the melting experiment. This effect has also been observed by Chayen et al.
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Kurihara K, Takamura N, Imaizumi S, Yamashita S, Kondo M. Ocular involvement caused by the accumulation of porphyrins in a patient with congenital erythropoietic porphyria. Br J Ophthalmol 2001; 85:1265-6. [PMID: 11596583 PMCID: PMC1723725 DOI: 10.1136/bjo.85.10.1260f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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84
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Yoshizawa K, Nagai H, Kurihara K, Sata N, Kawai T, Saito K. Long-term survival after surgical resection for pancreatic cancer. HEPATO-GASTROENTEROLOGY 2001; 48:1153-6. [PMID: 11490822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
BACKGROUND/AIMS Pancreatic cancer remains one of the most formidable tumors defying early detection and effective treatment. Long-term survivors, however, do exist after resection. We investigated the clinicopathologic features of patients with pancreatic cancer who survived more than 5 years to draw out some suggestions concerning the indication of surgical treatment. METHODOLOGY We studied the clinicopathologic features of 13 patients with pancreatic cancer who survived more than 5 years after resection. We reviewed their clinical records to investigate preoperative symptoms, serum tumor markers, operative findings, postoperative adjuvant therapy, and modes of recurrence and survival periods. Information on the location, size, histology and spread of the primary tumors were mainly obtained from pathology reports. RESULTS Histologic types of the long survivors included ductal adenocarcinoma of common type in 4 patients, mucinous noncystic adenocarcinoma in 2, intraductal papillary-mucinous carcinoma (invasive) in 4, undifferentiated carcinoma in 1, endocrine tumor (islet cell carcinoma) in 1 and acinar cell carcinoma in 1. All 4 cases of ductal adenocarcinoma of the common type showed a moderate invasion either to the retroperitoneum, the portal vein or the duodenum. Two patients with mucinous noncystic carcinoma attained a long survival despite extensive invasion of the pancreatic stroma, although one died of peritoneal carcinomatosis. Two of 4 patients with intraductal papillary-mucinous cancer (invasive) died of peritoneal dissemination 6 and 11 years after resection, respectively. Three patients with cancer of other special histologic types, i.e., undifferentiated, well-differentiated endocrine carcinoma and acinar cell carcinoma, showed invasion of the portal vein and splenic artery, involvement of the retroperitoneum and a metastatic tumor in the liver, respectively. CONCLUSIONS Whereas special histologic types including ductal variants tended to predispose to long-term survival, ductal adenocarcinoma of the common type had some chance of long survival even with invasion of the surrounding tissues.
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Utsunomiya K, Yamamoto H, Koiwai H, Kirii Y, Kashiwagi H, Konishi F, Kurihara K, Kawai T, Sugano K. Solitary colonic metastasis from renal cell carcinoma 9 years after nephrectomy: report of a case. Int J Colorectal Dis 2001; 16:193-4. [PMID: 11459294 DOI: 10.1007/s003840000281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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86
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Kurihara M, Kumagai K, Nakae Y, Kurihara K. [Latex allergy in patients with severe motor and intellectual disabilities syndrome]. NO TO HATTATSU = BRAIN AND DEVELOPMENT 2001; 33:241-5. [PMID: 11391967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Our experience of an anaphylactic reaction to latex in a severely disabled patient led us to investigate latex allergy in 58 cases with severe motor and intellectual disabilities syndrome. Latex specific IgE, total serum IgE, and eosinophil counts in peripheral blood were evaluated, as well as past history of treatment with medical latex materials, operation and allergic disorders. Only one case who had been operated three times, had anaphylactic reaction and mild atopic dermatitis. Fifteen cases (25.9%) had latex specific IgE of class 2 or more. In this latex positive group, past history of allergic disorders, such as bronchilal asthma, atopic dermatitis and drug eruptions, were the most prominent factor. Those without such a history were characterized by frequent use of medical latex materials and multiple operations. In conclusion, the danger of an anaphylactic reaction to latex should be recognized, particularly in the medical care for disabled patients.
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Moriyama S, Kurihara K, Yokokawa N, Satake M, Juji T. [Evaluation of absorbed dose-distribution in the X-ray or gamma-irradiator for blood products]. YAKUGAKU ZASSHI 2001; 121:283-8. [PMID: 11305046 DOI: 10.1248/yakushi.121.283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Irradiation of blood products abrogates the proliferation of lymphocytes present in cellular component, which is currently the only accepted methodology to prevent transfusion-associated graft versus host disease (TA-GVHD). A range of irradiation dose levels between 15 Gy and 50 Gy is being used, but the majority of facilities are employing 15 Gy. It should, however, be recognized that the delivered dose in the instrument canister might differ from the actual dose absorbed by the blood bag. This study have evaluated the actual dose distribution under practical conditions where a container was loaded with blood products or water bags, or filled with distilled water. This approach provides data that the maximum attenuation occurred when the container was completely filled with a blood-compatible material. Thus, an error of approximately 20 percent should be considered in the dose measured in the in-air condition. A dose calibration in an in-air condition may lead to substantial underexposure of the blood products. A dose distribution study using adequately prearranged exposure period verified that the absorbed dose of 15 Gy was attained at any point in the container for both linear accelerator and gamma-irradiator. The maximal difference in the absorbed dose between measured points was 1.5- and 1.6-fold for linear accelerator and gamma-irradiator, respectively. In conclusion, using blood-compatible materials, a careful dose calibration study should be employed in which the absorbed dose of 15 Gy is obtained at the point where the lowest dose could be expected.
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Abstract
A 54-year-old man with a complaint of dysphagia was found to have a prominent stricture in the proximal esophagus. A biopsy of the stenotic area indicated sarcoma, leading to subtotal esophagectomy. The surgically removed esophagus demonstrated a well-defined intramural mass, consisting of a mixture of fibroblastic cells with bland cytological appearances and inflammatory cells. Reflux esophagitis which was present distal to the stricture seemed to play a role in the development of this inflammatory pseudotumor.
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Takeshita M, Iwashita A, Kurihara K, Ikejiri K, Higashi H, Udoh T, Kikuchi M. Histologic and immunohistologic findings and prognosis of 40 cases of gastric large B-cell lymphoma. Am J Surg Pathol 2000; 24:1641-9. [PMID: 11117785 DOI: 10.1097/00000478-200012000-00008] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
It has been considered that gastric large B cell lymphoma mainly consists of mucosa-associated lymphoid tissue lymphoma (MALToma) with large cell transformation. However, debate continues about the cell lineage. We analyzed 61 operated cases of gastric B cell lymphoma, mainly focusing on 40 cases of diffuse large cell lymphoma (DLCL). Immunohistologically, two cases were classified as CD10-positive follicular lymphoma, 19 cases were low-grade MALToma, 11 CD10-negative DLCL with a component of low-grade MALToma (high-grade MALToma), 12 CD10-positive DLCL, and 17 CD10-negative DLCL without MALToma (pure DLCL). Lymphoepithelial lesion (LEL) was found in all -cases of high-grade MALToma, and in eight of these its invasion was confined to the mucosa and submucosa. Expression of Bcl-6 was detected in two cases of high-grade MALToma. Only two cases of CD10-positive DLCL had large cell LEL, and seven cases showed tumor invasion beyond the submucosa. All 12 cases were positive for Bcl-6, and a delicate meshwork of CD35 (Ber-MAC-DRC)-positive follicular dendritic cells was detected in eight cases. Pure DLCL of all 17 cases reached the proper muscle layer or more, and expression of Bcl-6 was detected in 10 cases. For patients with pure DLCL, overall survival was significantly (p <0.05) worse than those of high-grade MALToma and CD10-positive DLCL by Kaplan-Meier and log-rank methods. Clinical staging and Bcl-6 expression were also good prognostic factors in patients with DLCL. Three groups of gastric DLCL each had unique histologic findings, immunohistologic characteristics, and prognosis.
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MESH Headings
- Aged
- Female
- Humans
- Immunohistochemistry
- Lymphoma, B-Cell/metabolism
- Lymphoma, B-Cell/pathology
- Lymphoma, B-Cell/surgery
- Lymphoma, B-Cell, Marginal Zone/metabolism
- Lymphoma, B-Cell, Marginal Zone/pathology
- Lymphoma, B-Cell, Marginal Zone/surgery
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Lymphoma, Large B-Cell, Diffuse/pathology
- Lymphoma, Large B-Cell, Diffuse/surgery
- Lymphoma, Non-Hodgkin/metabolism
- Lymphoma, Non-Hodgkin/pathology
- Lymphoma, Non-Hodgkin/surgery
- Male
- Middle Aged
- Neprilysin/analysis
- Prognosis
- Stomach Neoplasms/metabolism
- Stomach Neoplasms/pathology
- Stomach Neoplasms/surgery
- Survival Analysis
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Nishikawa T, Kamijo Y, Kondo R, Sugie H, Kurihara K, Okuda T, Matsumoto N, Okada Y, Ohtani H. Determination of (+)- and (-)-bromoisovalerylurea in sera of overdosed subjects. J Anal Toxicol 2000; 24:691-5. [PMID: 11110023 DOI: 10.1093/jat/24.8.691] [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: 11/12/2022] Open
Abstract
Bromoisovalerylurea (bromisovalum) is a sedative-hypnotic given orally as a racemic mixture of optical isomers (i.e., (+)- and (-)-enantiomer) and frequently taken in overdose in order to commit suicide. Sera from 16 overdosed subjects were analyzed for each enantiomer by high-performance liquid chromatography on chiral stationary phases. The (+)-enantiomer concentration was lower than the (-)-enantiomer concentration in all specimens, that is, the ratio of the (+)-enantiomer to the total concentration ranged from about 50% to 0%. The ratio of the (+)-enantiomer was continuously decreasing in each subject. The data indicate that the drug in gastrointestinal tract was absorbed into blood nonstereoselectively and that the drug in blood was eliminated stereoselectively. The enantioselective determination of this drug will give useful information on absorption and elimination.
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Kurihara K. A new shape reproduction method based on the Cauchy-condition surface for real-time tokamak reactor control. FUSION ENGINEERING AND DESIGN 2000. [DOI: 10.1016/s0920-3796(00)00174-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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92
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Kurihara K, Nakanishi N, Ueha T. Regulation of Na(+)-K(+)-ATPase by cAMP-dependent protein kinase anchored on membrane via its anchoring protein. Am J Physiol Cell Physiol 2000; 279:C1516-27. [PMID: 11029299 DOI: 10.1152/ajpcell.2000.279.5.c1516] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Na(+)-K(+)- ATPase alpha-subunits in basolateral membrane vesicles (BLMVs) purified from rat parotid glands were (32)P-labeled within 5 s by incubation with [gamma-(32)P]ATP at 37 degrees C in the presence of cAMP, but no labeling occurred without cAMP. Phosphorylation of Na(+)-K(+)-ATPase was associated with a decrease in its activity. This alpha-subunit phosphorylation disappeared when BLMVs were briefly incubated with cAMP and subsequent washing before the incubation with [gamma-(32)P]ATP, indicating that catalytic subunit of protein kinase A (PKA) associated to BLMVs via binding with its RII regulatory subunit anchored on the membrane. In the absence of cAMP, a PKA catalytic subunit readily reassociated with the membrane-bound RII subunit. HT-31 peptide inhibited the Na(+)-K(+)-ATPase phosphorylation by membrane-bound endogenous PKA, indicating an involvement of A-kinase anchoring protein (AKAP). AKAP-150 protein in BLMVs was shown by immunoblotting and an RII overlay assay and was coimmunoprecipitated by anti-RII antibody. These results show that Na(+)-K(+)-ATPase of rat parotid gland acinar cells is regulated in vivo by membrane-anchored PKA via AKAP rather than by free cytosolic PKA.
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Kurihara K, Shimizu S, Chong J, Hishima T, Funata N, Kashiwagi H, Nagai H, Miyaki M, Fukayama M. Nuclear localization of immunoreactive beta-catenin is specific to familial adenomatous polyposis in papillary thyroid carcinoma. Jpn J Cancer Res 2000; 91:1100-2. [PMID: 11092973 PMCID: PMC5926294 DOI: 10.1111/j.1349-7006.2000.tb00891.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Thyroid carcinoma is the first symptom in some patients with familial adenomatous polyposis (FAP). We evaluated the cellular localization of beta-catenin in thyroid carcinomas associated (n = 4) or not associated (n = 173) with FAP, since loss of functional protein of the adenomatous polyposis coli (APC) gene leads to nuclear accumulation of beta-catenin in adenomas and carcinomas of the FAP colon. Immunoreactive beta-catenin was demonstrated at the cell membrane of glandular cells of the non-neoplastic thyroid and non-FAP carcinomas. On the other hand, cytoplasmic and nuclear accumulation of beta-catenin is specific to FAP-associated papillary carcinomas. The abnormality in the APC / beta-catenin pathway is thus also important in FAP-associated thyroid carcinoma, and beta-catenin immunohistochemistry is a feasible screening method to identify occult FAP in young patients with thyroid tumors.
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Asakura K, Kurihara K, Ikumo A, Tanaka A, Miura T, Ozawa T, Kushibe Y, Osanai S, Kondepudi D. Chirally autocatalytic reaction performed in highly supersaturated conditions. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1521-3900(200010)160:1<7::aid-masy7>3.0.co;2-h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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95
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Shoji T, Ueda H, Ohgami T, Sakamoto T, Katsuragi Y, Yamauchi K, Kurihara K. Amino acids dissolved in stream water as possible home stream odorants for masu salmon. Chem Senses 2000; 25:533-40. [PMID: 11015325 DOI: 10.1093/chemse/25.5.533] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It is well established that salmon return to their home stream by sensing the odors of the stream water. In this study we have attempted to identify the home stream odorants used by masu salmon in Lake Toya. The salmon in Lake Toya return to the home stream which flows into the lake after lake life for 2-3 years. Besides water from the home stream, waters from two other streams which flow into Lake Toya were also used in the experiments. We analyzed the compositions of amino acids, inorganic cations and bile acids in waters from the three streams. Application of mixtures of inorganic cations or bile acids, reconstituted based on the compositions of the stream waters, to the olfactory epithelium induced only very small responses. On the other hand, application of mixtures of amino acids induced large responses. The response to artificial stream water reconstituted based on the compositions of amino acids and salts closely resembles that to the corresponding stream water. Cross-adaptation experiments with three combinations of the mixtures were carried out. The response pattern for each combination closely resembled that to the corresponding combination of stream waters. Based on the results obtained, we concluded that amino acids dissolved in the home stream water are possible home stream odorants.
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Kurihara K, Miura NN, Uchiyama M, Ohno N, Adachi Y, Aizawa M, Tamura H, Tanaka S, Yadomae T. Measurement of blood clearance time by Limulus G test of Candida-water soluble polysaccharide fraction, CAWS, in mice. FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY 2000; 29:69-76. [PMID: 10967263 DOI: 10.1111/j.1574-695x.2000.tb01507.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Limulus G test, responsive to beta-1,3-D-glucan, is a well-established method for the detection of invasive fungal infection. We have recently found that Candida albicans released a water-soluble polysaccharide fraction (CAWS) into synthetic medium (Uchiyama et al., FEMS Immunol. Med. Microbiol. 24 (1999) 411-420). CAWS was composed of a mannoprotein-beta-glucan complex and activated Limulus factor G, and thus would be similar to the Limulus active substance in patient's blood. In a preliminary investigation, we have found that CAWS is lethal when administered intravenously in a murine system. In this study, we examined the toxicity and then the fate of CAWS in mice. The lethal toxicity was strain-dependent and strain DBA/2 was the most resistant. The toxicity was, at least in part, reduced by salbutamol sulfate and prednisolone treatment in the sensitive strains. On intravenous administration, the half clearance time (t1/2) was approximately 40 min in mice (DBA/2). On intraperitoneal administration, CAWS appeared in the blood with a peak concentration at 1 h. In order to establish a treatment plan, it is important to demonstrate the onset and the termination of deep-seated mycosis. The Limulus G test is suitable for the above purpose; however, it is necessary to fully understand the fate of beta-1,3-D-glucan in patients' blood.
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Kurihara K, Tanaka I, Adams MWW, Moiseeva N, Bau R, Niimura N. 1.5Å high-resolution neutron diffraction results of rubredoxin. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300025903] [Citation(s) in RCA: 3] [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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Takatsu A, Misawa S, Yoshioka N, Nakasono I, Sato Y, Kurihara K, Nishi K, Maeda H, Kurata T. [A proposal of essentials for forensic pathological diagnosis of sudden infant death syndrome (SIDS)]. NIHON HOIGAKU ZASSHI = THE JAPANESE JOURNAL OF LEGAL MEDICINE 2000; 54:247-55. [PMID: 11060995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
There are many sudden unexpected infant death cases which are easily diagnosed as sudden infant death syndrome (SIDS) both with or without autopsy in Japan. A SIDS diagnosis may provide a cover for accidental or criminal death. SIDS should not be a convenient diagnostic box that shelters the cases of unexpected infant death which lack the necessary antemortem information to make the correct diagnosis. The authors consider that SIDS should be diagnosed according to the direction of the international definition of SIDS, and propose the following essentials for a forensic pathological diagnosis. 1) A thorough autopsy should be performed based on precise autopsy protocol, including not only histological observation, but also, if necessary, toxicological, bacteriological, viral and/or biochemical examinations. 2) The forensic pathologist should be provided with pertinent information regarding antemortem health status, past clinical history, social circumstances, death scene investigation, etc. In order to collect more precise information, the authors recommend using a questionnaire such as the example in this report to record information from the deceased's guardians. 3) Suspicion of accidental death or infanticide should be completely ruled out. SIDS should be diagnosed only after these three essentials have been satisfied. When there is even a slight suspicion of accidental death or infanticide, or when the forensic pathologist can not obtain pertinent information about the deceased, the causes and classification of the death should be diagnosed as unspecified or undetermined. That is, the causes and classification of the death are undetermined as to whether it is a natural or unnatural death. Furthermore, several warning flags indicating a possible SIDS diagnosis were proposed: a case found dead in a supine position, the existence of a foreign body in the respiratory tract or mild infectious findings. The authors also emphasize the physician's responsibility to report a case found dead or dying of unnatural or clinically unexplained causes to the police. This is the crucial first step in getting an accurate diagnosis of SIDS.
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Kurihara K, Nakada Y, Morozumi K, Kokawa C, Nakaya N. [A case of Lemmel's syndrome with serious jaundice exacerbated by eating]. Nihon Ronen Igakkai Zasshi 2000; 37:639-43. [PMID: 11086390 DOI: 10.3143/geriatrics.37.639] [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: 11/11/2022]
Abstract
An 86-year old woman rapidly developed serious jaundice (T-Bil 18.3 mg/dl 12.3 mg/dl). Her jaundice was exacerbated by eating, and improved by fasting. Abdominal CT showed a giant diverticulum in the second part of the duodenum and dilation of the proximal common bile duct. Endoscopic findings confirmed juxtapapillary duodenal diverticulum in contact with the distal common bile duct. MRCP revealed extrinsic compression of the distal common bile duct by the diverticulum. Lemmel's syndrome was diagnosed. Jaundice did not recur after surgery. We speculated that in this case the diverticulum filled by duodenal contents easily compressed the distal common bile duct after eating.
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Chong J, Koshiishi N, Kurihara K, Kubono S, Kawai T, Fukayama M. Aspiration and imprint cytopathology of thyroid carcinoma associated with familial adenomatous polyposis. Diagn Cytopathol 2000; 23:101-5. [PMID: 10888754 DOI: 10.1002/1097-0339(200008)23:2<101::aid-dc7>3.0.co;2-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Thyroid carcinomas occur in association with familial adenomatous polyposis (FAP), and some are the first symptom of FAP. Although several histological features have been reported, the cytopathology of FAP-associated thyroid carcinoma has not yet been described. We report on two cases of FAP-associated thyroid carcinomas diagnosed by fine-needle aspiration biopsy and one case imprinted after resection. All 3 patients belonged to the same family, and thyroid carcinoma was the first symptom of the proband. Cytological features include fascicular or whorl formation of spindle cells with papillary, follicular, and/or solid architectures, in addition to the typical features of papillary carcinoma. The cytological features of FAP-associated thyroid carcinomas are characteristic and may suggest FAP.
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