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Ogawa N, Higashi K, Nagase H, Endo T, Moribe K, Loftsson T, Yamamoto K, Ueda H. Effects of Cogrinding with β-Cyclodextrin on the Solid State Fentanyl. J Pharm Sci 2010; 99:5019-29. [DOI: 10.1002/jps.22193] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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127
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Higashi K, Tozuka Y, Moribe K, Yamamoto K. Salicylic Acid/γ-Cydodextrin 2:1 and 4:1 Complex Formation by Sealed-Heating Method. J Pharm Sci 2010; 99:4192-200. [DOI: 10.1002/jps.22133] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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128
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Moribe K, Shibata M, Furuishi T, Higashi K, Tomono K, Yamamoto K. Effect of particle size on skin permeation and retention of piroxicam in aqueous suspension. Chem Pharm Bull (Tokyo) 2010; 58:1096-9. [PMID: 20686267 DOI: 10.1248/cpb.58.1096] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of particle size on the skin permeation and retention of piroxicam (PXC) in an aqueous suspension were investigated. PXC particles of about 23 nm, 173 nm, and 2.1 microm in size were prepared by the cogrinding of PXC/polyvinylpyrrolidone (PVP) K12/sodium dodecyl sulfate physical mixture (mean particle size, 9.6 microm) using a vibrational rod and ball mills. Particles were stable after storage in 0.1 m acetate buffer (pH 4.5) for 24 h. The amount of PXC that permeated and was retained in hairless mouse skin increased with the reduction of particle size up to 23 nm. Amorphous PXC was formed when PXC was coground with PVP, though the amorphous formation did not affect the amount of PXC permeated. Reduction of particle size to less than 50 nm, and the subsequent increase in surface area of PXC nanocrystals appeared to affect skin permeation and retention behavior.
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Moribe K, Kinoshita R, Higashi K, Tozuka Y, Yamamoto K. Coloration Phenomenon of Mefenamic Acid in Mesoporous Silica FSM-16. Chem Pharm Bull (Tokyo) 2010; 58:214-8. [DOI: 10.1248/cpb.58.214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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130
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Higashi K, Ideura S, Waraya H, Limwikrant W, Moribe K, Yamamoto K. Simultaneous Dissolution of Naproxen and Flurbiprofen from a Novel Ternary .GAMMA.-Cyclodextrin Complex. Chem Pharm Bull (Tokyo) 2010; 58:769-72. [DOI: 10.1248/cpb.58.769] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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131
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Hanawa K, Hanawa T, Tsuchiya C, Higashi K, Suzuki M, Moribe K, Yamamoto K, Oguchi T. Development of Sarpogrelate External Preparation for Intractable Pain Control. I. Pre-formulation Study on Application of Modified .BETA.-Cyclodextrins. Chem Pharm Bull (Tokyo) 2010; 58:45-50. [DOI: 10.1248/cpb.58.45] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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132
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Limwikrant W, Higashi K, Yamamoto K, Moribe K. Characterization of ofloxacin–oxalic acid complex by PXRD, NMR, and THz spectroscopy. Int J Pharm 2009; 382:50-5. [DOI: 10.1016/j.ijpharm.2009.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2009] [Accepted: 08/02/2009] [Indexed: 10/20/2022]
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133
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Onuki Y, Higashi K, Moribe K, Yamamoto K. Improved chemical stability of ascorbic acid and thiamine nitrate in L-HPC granules. ADV POWDER TECHNOL 2009. [DOI: 10.1016/j.apt.2009.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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134
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Ito A, Watanabe T, Yada S, Hamaura T, Nakagami H, Higashi K, Moribe K, Yamamoto K. Prediction of recrystallization behavior of troglitazone/polyvinylpyrrolidone solid dispersion by solid-state NMR. Int J Pharm 2009; 383:18-23. [PMID: 19732816 DOI: 10.1016/j.ijpharm.2009.08.037] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 08/24/2009] [Accepted: 08/28/2009] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to elaborate the relationship between the (13)C CP/MAS NMR spectra and the recrystallization behavior during the storage of troglitazone solid dispersions. The solid dispersions were prepared by either the solvent method or by co-grinding. The recrystallization behavior under storage conditions at 40 degrees C/94% RH was evaluated by the Kolmogorov-Johnson-Mehl-Avrami (KJMA) equation. Solid dispersions prepared by the solvent method or by prolonged grinding brought about inhibition of the nucleation and the nuclei growth at the same time. No differences in the PXRD profiles were found in the samples prepared by the co-grinding and solvent methods, however, (13)C CP/MAS NMR showed significant differences in the spectra. The correlation coefficients using partial least square regression analysis between the PXRD profiles and the apparent nuclei-growth constant or induction period to nucleation were 0.1305 or 0.6350, respectively. In contrast, those between the (13)C CP/MAS NMR spectra and the constant or the period were 0.9916 or 0.9838, respectively. The (13)C CP/MAS NMR spectra had good correlation with the recrystallization kinetic parameters evaluated by the KJMA equation. Consequently, solid-state NMR was judged to be a useful tool for the prediction of the recrystallization behavior of solid dispersions.
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Nishiwaki A, Watanabe A, Higashi K, Tozuka Y, Moribe K, Yamamoto K. Molecular states of prednisolone dispersed in folded sheet mesoporous silica (FSM-16). Int J Pharm 2009; 378:17-22. [DOI: 10.1016/j.ijpharm.2009.05.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 05/14/2009] [Accepted: 05/16/2009] [Indexed: 11/16/2022]
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136
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Wanawongthai C, Pongpeerapat A, Higashi K, Tozuka Y, Moribe K, Yamamoto K. Nanoparticle formation from probucol/PVP/sodium alkyl sulfate co-ground mixture. Int J Pharm 2009; 376:169-75. [DOI: 10.1016/j.ijpharm.2009.04.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2009] [Revised: 04/21/2009] [Accepted: 04/22/2009] [Indexed: 10/20/2022]
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137
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Tozuka Y, Yokohama C, Higashi K, Moribe K, Yamamoto K. Adsorption state of naphthoic acids on folded sheets mesoporous materials with different pore sizes. J Drug Deliv Sci Technol 2009. [DOI: 10.1016/s1773-2247(09)50083-4] [Citation(s) in RCA: 6] [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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138
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Moribe K, Wanawongthai C, Shudo J, Higashi K, Yamamoto K. Morphology and surface States of colloidal probucol nanoparticles evaluated by atomic force microscopy. Chem Pharm Bull (Tokyo) 2008; 56:878-80. [PMID: 18520102 DOI: 10.1248/cpb.56.878] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Morphology and surface states of colloidal probucol nanoparticles after dispersion of probucol/polyvinylpyrrolidone (PVP)/sodium dodecyl sulphate (SDS) ternary ground mixture into water were investigated by atomic force microscopy (AFM). The observed particles had core-shell structure, i.e. drug nanocrystals were covered with PVP and SDS complex. The AFM phase image and the force curve analyses indicated that probucol nanoparticles with PVP K17 showed layer structure, compared to those with PVPK12. The structural difference was explainable in terms of the molecular states of PVP-SDS complex on the particle surface. These findings support not only the mechanism of drug nanoparticle formation but also the in vivo absorption results with the almost same particle size of ca. 40 nm.
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139
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Takamiya O, Ishikawa S, Ohnuma O, Suehisa H, Iijima K, Kayamori Y, Bando S, Higashi K. Japanese collaborative study to assess inter-laboratory variation in factor VII activity assays. J Thromb Haemost 2007; 5:1686-92. [PMID: 17488350 DOI: 10.1111/j.1538-7836.2007.02612.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The clinical phenotype manifest by patients with factor VII (FVII) deficiency correlates poorly with that predicted by laboratory tests. Despite its importance, there are no data on the variability of inter-laboratory determinations of low to very low plasma FVII activity (FVII:C). METHODS We distributed three FVII-deficient plasma samples, prepared by immunoaffinity chromatography, to 58 laboratories in Japan. All samples were assayed using standardized reference plasma as a calibrator. Recombinant thromboplastin was also supplied as a common reagent. RESULTS In the case of sample A, which had a very low FVII:C, the use of standardized reference plasma and thromboplastin, lowered the variability of inter-laboratory measurements, when compared with the variability observed when samples were assayed using the respective laboratory's routine method. CONCLUSIONS The data obtained indicated that results for samples with a very low FVII:C were greatly influenced by the number of plasma dilutions used in constructing a standard activity curve, and also by the type of calibrator and thromboplastin. Such variability was not seen for samples with moderate FVII:C. We conclude that it is necessary to develop a more sensitive and accurate FVII:C measurement system for the diagnosis and treatment of FVII deficiency.
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Pongpeerapat A, Higashi K, Tozuka Y, Moribe K, Yamamoto K. Molecular Interaction among Probucol/PVP/SDS Multicomponent System Investigated by Solid-State NMR. Pharm Res 2006; 23:2566-74. [PMID: 16969700 DOI: 10.1007/s11095-006-9089-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2006] [Accepted: 06/07/2006] [Indexed: 11/25/2022]
Abstract
PURPOSE Effects of polyvinylpyrrolidone (PVP) molecular weight on the solid-state intermolecular interactions among probucol/PVP/sodium dodecyl sulfate (SDS) ternary ground mixtures (GM) and the formation of nanoparticles were investigated by solid-state NMR spectroscopy. MATERIALS AND METHODS Ternary GMs of probucol were prepared with PVP (K12, K17, K30 or K90) and SDS at a weight ratio of 1:3:1 and were ground for 15, 30 and 60 min. Solid-state interactions were evaluated using powder X-ray diffraction (PXRD) and solid-state cross polarization/magic angle spinning (CP/MAS) (13)C NMR spectroscopy. A high resolution scanning electron microscopy (SEM) was employed to observe nanoparticles of probucol in the GM. RESULTS The solid-state (13)C CP/MAS NMR results indicate that the low molecular weight PVP interacts with probucol and SDS more strongly than the high molecular weight PVP in the ternary GM. This finding was consistent with the result that smaller drug nanoparticles were obtained using low molecular weight of PVP. SEM images of probucol/PVP K12/SDS confirmed the presence of nanoparticles (15-25 nm) in the GM. CONCLUSIONS Grinding-induced solid-state interactions among drug, PVP and SDS could be detected using solid state (13)C NMR. The interactions in both probucol-PVP and PVP-SDS should occur simultaneously to generate nanometer-sized particles of probucol.
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141
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Yokote T, Akioka T, Oka S, Yamano T, Hara S, Higashi K, Enomoto U, Kusakabe H, Kiyokane K, Tsuji M, Hanafusa T. Irinotecan (CPT-11) in the treatment of mycosis fungoides. Br J Dermatol 2005; 153:1086-8. [PMID: 16225643 DOI: 10.1111/j.1365-2133.2005.06930.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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142
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Takamiya O, Hando S, Tekondo M, Bando S, Ohkura M, Negoro T, Yoshida T, Higashi K, Ohnuma O, Kubota K, Tatsumi N. Japanese collaborative study for fibrinogen assay: variability of the fibrinogen assay between different laboratories does not improve when a common calibrator is used. ACTA ACUST UNITED AC 2005; 27:177-83. [PMID: 15938723 DOI: 10.1111/j.1365-2257.2005.00686.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several national and local external quality assurance schemes have been developed to improve the plasma fibrinogen assay in Japan over the past 30 years. Now most commercial calibrant plasma may be calibrated against an International Standard preparation, in order to achieve agreement of results obtained by different laboratories. However, we have never achieved satisfactory results, according to an external quality control survey regarding the fibrinogen assay. Therefore, we distributed two kinds of fibrinogen standards to be used as common calibrators, along with three plasma samples, among 183 general laboratories in Japan. The results of this collaborative study showed that the assigned value for the commercially available calibrators remained problematic. Furthermore, it was concluded that the between-laboratory variability could not be improved beyond a certain degree of standardization, even if a common calibrator was used for the Clauss-derived assay carried out by an automatic coagulometer.
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143
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Higashi K, Takasawa R, Yoshimori A, Goh T, Tanuma S, Kuchitsu K. Identification of a novel gene family, paralogs of inhibitor of apoptosis proteins present in plants, fungi, and animals. Apoptosis 2005; 10:471-80. [PMID: 15909109 DOI: 10.1007/s10495-005-1876-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Only few orthologs of animal apoptosis regulators have been found in plants. Recently, the ectopic expression of mammalian inhibitor of apoptosis proteins (IAPs) has been shown to affect plant programmed cell death. Here, we identified two novel proteins homologous to Arabidopsis thaliana IAP-like protein (AtILP) 1 and 2 by applying an improved motif searching method. Furthermore, homologs of AtILP1 were found to occur as a novel gene family in other organisms such as fungi and animals including Homo sapiens (HsILP1). Like baculovirus IAP repeats (BIRs) in IAPs, ILPs contain two highly conserved BIR-like domains (BLDs) with a putative C2HC-type zinc finger. Phylogenetic analyses indicated that ILPs are putative paralogs of IAPs. Homology modeling revealed that the three-dimensional structure of BLD in HsILP1 is similar to that of BIR. Transient expression of HsILP1 resulted in inhibition of etoposide-induced apoptosis in HEK293 and HeLaS3 cells. These findings suggest that ILPs are conserved in a wide range of eukaryotes including plants, and that their functions are closely related to those of IAPs.
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144
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Higashi K, Tsukiyama-Kohara K, Tanaka T, Tanaka E, Kiyosawa K, Kohara M. Characterization of hypervariable region in hepatitis C virus envelope protein during acute and chronic infection. Arch Virol 2005; 150:883-98. [PMID: 15662481 DOI: 10.1007/s00705-004-0470-0] [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: 09/14/2004] [Accepted: 11/19/2004] [Indexed: 11/24/2022]
Abstract
Hepatitis C virus (HCV) causes persistent infection in most patients. To clarify the mechanisms underlying establishment of this persistent infection, nucleotide sequences of the E1/E2 region were characterized in 5 patients with acute and chronic HCV infection. We used direct DNA sequencing methods to identify the major sequence of HCV in each patient. Each HCV genome displayed a high frequency of nucleotide sequence variation in the hypervariable region (HVR) of E2. However, patient-specific conserved nucleotide sequences were identified in the E1/E2 region during the course of infection and conserved the higher-order protein structure. In the acute phase HCV infection, amino acid substitution in HVR-1 as the monthly rate of amino acids substitution per site (%) between each point exceeded 10.2%. In the chronic phase HCV infection, a significantly lower rate of amino acid substitution was observed in patients. The host immune responses to HVR-1 of each HCV isolates from all clinical courses were characterized using synthetic peptides and ELISA. One chronic patient serum (genotype 1b) did not react at all to its own HVR-1 peptides, however another patient (genotype 2b) reacted to all clinical course. These results indicated that HVR-1 might not always exhibit neutralizing epitopes of HCV infection. The sequence variation in HVR-1 may instead indicate the existence of various clones in acute phase infection and the adaption of these clones is thought to have caused persistent and chronic infection in each patient.
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Sagawa M, Sugita M, Higashi K, Isobe T, Hirose T, Matsubara F, Ida M, Isse K, Sakuma T. [Lung cancer with ground glass opacity diagnosed by transbronchial lung biopsy using an ultrathin bronchoscope and virtual bronchoscopy]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2004; 57:1121-5. [PMID: 15553029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Although thoracic computed tomography (CT) screening indicated that there are many patients who have pulmonary shadow with ground glass opacity, it is sometimes difficult to obtain the appropriate specimens for histological diagnosis of such patients. We herein report a lung cancer patient with ground glass opacity who was diagnosed preoperatively by an ultrathin bronchoscope and virtual bronchoscopy. A 78-year-old female was admitted to our hospital due to bacterial pneumonia. At the admission, CT showed another abnormal small shadow in her right middle lobe. Since the shadow was not visible by fluoroscopy, we reconstructed the images of virtual bronchoscopy using the data obtained by multidetector CT. The location of the shadow was determined in the peripheral area of a dorsal branch of right B4aialpha. Then the transbronchial lung biopsy using an ultrathin bronchoscope with simultaneous CT guidance was performed. The histological findings of the biopsy specimens revealed that the shadow was highly suspicious for malignancy. Therefore, the right middle lobectomy was conducted, and the tumor was diagnosed as an adenocarcinoma. An ultrathin bronchoscope with virtual bronchoscopy is useful to diagnose a pulmonary shadow with ground glass opacity.
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Teraoka H, Russell C, Regan J, Chandrasekhar A, Concha ML, Yokoyama R, Higashi K, Take-Uchi M, Dong W, Hiraga T, Holder N, Wilson SW. Hedgehog and Fgf signaling pathways regulate the development of tphR-expressing serotonergic raphe neurons in zebrafish embryos. ACTA ACUST UNITED AC 2004; 60:275-88. [PMID: 15281067 PMCID: PMC2789256 DOI: 10.1002/neu.20023] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Serotonin (5HT) plays major roles in the physiological regulation of many behavioral processes, including sleep, feeding, and mood, but the genetic mechanisms by which serotonergic neurons arise during development are poorly understood. In the present study, we have investigated the development of serotonergic neurons in the zebrafish. Neurons exhibiting 5HT-immunoreactivity (5HT-IR) are detected from 45 h postfertilization (hpf) in the ventral hindbrain raphe, the hypothalamus, pineal organ, and pretectal area. Tryptophan hydroxylases encode rate-limiting enzymes that function in the synthesis of 5HT. As part of this study, we cloned and analyzed a novel zebrafish tph gene named tphR. Unlike two other zebrafish tph genes (tphD1 and tphD2), tphR is expressed in serotonergic raphe neurons, similar to tph genes in mammalian species. tphR is also expressed in the pineal organ where it is likely to be involved in the pathway leading to synthesis of melatonin. To better understand the signaling pathways involved in the induction of the serotonergic phenotype, we analyzed tphR expression and 5HT-IR in embryos in which either Hh or Fgf signals are abrogated. Hindbrain 5HT neurons are severely reduced in mutants lacking activity of either Ace/Fgf8 or the transcription factor Noi/Pax2.1, which regulates expression of ace/fgf8, and probably other genes encoding signaling proteins. Similarly, serotonergic raphe neurons are absent in embryos lacking Hh activity confirming a conserved role for Hh signals in the induction of these cells. Conversely, over-activation of the Hh pathway increases the number of serotonergic neurons. As in mammals, our results are consistent with the transcription factors Nk2.2 and Gata3 acting downstream of Hh activity in the development of serotonergic raphe neurons. Our results show that the pathways involved in induction of hindbrain serotonergic neurons are likely to be conserved in all vertebrates and help establish the zebrafish as a model system to study this important neuronal class.
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Higashi K, Ueda Y, Ikeda R, Kodama Y, Guo J, Matsunari I, Oguchi M, Tonami H, Katsuda S, Yamamoto I. P-glycoprotein expression is associated with FDG uptake and cell differentiation in patients with untreated lung cancer. Nucl Med Commun 2004; 25:19-27. [PMID: 15061261 DOI: 10.1097/00006231-200401000-00004] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In vitro studies demonstrated that the accumulation of 2-deoxy-D-glucose was reduced in multidrug resistant cell lines. In animal study, it has been suggested that 2-[18F]fluoro-2-deoxy-D-glucose (FDG) may be a marker for multidrug resistance (MDR). The aim of this clinical study was to compare MDR characteristics by immunohistochemical assay with FDG uptake and investigate whether FDG is a marker for MDR in patients with untreated lung cancer. Forty-seven patients with 49 untreated lung cancers, who had undergone both preoperative FDG PET imaging and thoracotomy, were enrolled in this study. Before surgery, FDG PET was performed 40 min after injection, and standardized uptake values (SUVs) were obtained. Patients were classified into low-SUV (< or = 5) and high-SUV (> 5) groups. After surgery, the expression of P-glycoprotein (Pgp) was investigated by immunohistochemistry, and the lung cancer FDG uptake was analysed for possible association with Pgp expression. The strong intensity of Pgp immunoreactivity was seen only in the low-SUV group. The percentage of the Pgp positive area was significantly lower in the high-SUV group (21.7 +/- 13.4%) than in the low-SUV group (44.1 +/- 29.7%) (P = 0.015). In the high-SUV group, the percentage of Pgp positive area did not exceed 50%. In lung adenocarcinoma, the intensity of Pgp immunoreactivity and the percentage of Pgp positive area increased with degree of cell differentiation, while FDG uptake decreased with degree of cell differentiation. Bronchioloalveolar carcinoma, in particular, showed overexpression of Pgp and modest uptake of FDG. In conclusion, Pgp expression was found to be inversely related to FDG uptake in untreated lung cancer. Pgp expression correlated with the degree of cell differentiation in adenocarcinomas, whilst FDG uptake was inversely related to cell differentiation. FDG may be an in vivo marker for MDR in patients with untreated lung cancer.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
- Adenocarcinoma, Bronchiolo-Alveolar/diagnostic imaging
- Adenocarcinoma, Bronchiolo-Alveolar/metabolism
- Adenocarcinoma, Bronchiolo-Alveolar/pathology
- Adenocarcinoma, Bronchiolo-Alveolar/surgery
- Aged
- Aged, 80 and over
- Biomarkers, Tumor/metabolism
- Cell Division
- Drug Resistance, Multiple
- Female
- Fluorodeoxyglucose F18/pharmacokinetics
- Gene Expression Regulation, Neoplastic
- Humans
- Lung Neoplasms/diagnostic imaging
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- Lung Neoplasms/surgery
- Male
- Middle Aged
- Radionuclide Imaging
- Radiopharmaceuticals/pharmacokinetics
- Reproducibility of Results
- Sensitivity and Specificity
- Statistics as Topic
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Ikee R, Hyodo N, Higashi K, Yamada M, Kikuchi Y, Suzuki S, Miura S. Exacerbation of cryoglobulinemia associated with intravenous radiographic contrast medium. Scand J Rheumatol Suppl 2004; 33:61-2. [PMID: 15124948 DOI: 10.1080/03009740310004081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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149
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Takeshita M, Ohsuzu F, Higashi K, Yonemura A, Sawada S, Tabata S, Obata T, Mizuno K, Sano J, Onodera Y, Yamashita T, Miyajima E, Mori K, Tomonobu K, Katsuragi Y, Yasukawa T, Nakamura H. 4P-0930 Effect of diacylglycerol oil containing plant sterols on serum lipid parameters in patients taking pravastatin (10 mg/day). ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91188-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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150
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Kobori S, Takahashi T, Ishi N, Goto R, Higashi K. 1P-0141 Estimation of atherogenic risk factors and complications in type 2 diabetic patients. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90215-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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