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Shimizu Y, Saito T, Aoki Y, Yokota T, Nagata T, Nakamura A, Osawa M, Takeda S. P3.04 Skipping of exons 6 and 8 of the DMD gene has been achieved in myogenic cells from an exon-7 deleted DMD patient: direct application of antisense sequences found in study with canine muscular dystrophy. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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202
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Nakamura H, Nishino I, Komaki H, Mori M, Ooya Y, Motoyoshi Y, Matsumura T, Takeda S, Kawai M. P4.41 REMUDY – DMD/BMD patient registry in Japan. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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203
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Yazawa S, Murahara T, Ishiguro M, Shinozaki J, Sugiura K, Toyoshima T, Takeda S, Shiraishi H, Matsuhashi M, Nagamine T. P36-21 Cerebral networks underlying motor execution triggered by auditory omission. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61316-8] [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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204
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Kohno H, Nogami T, Takeda S, Ohno Y, Yonenaga I, Ichikawa S. Electrical breakdown of individual Si nanochains and silicide nanochains. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2010; 10:6655-6658. [PMID: 21137777 DOI: 10.1166/jnn.2010.3144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Electron transport across individual Si nanochains and silicide nanochains is investigated using a micro-manipulator in a transmission electron microscope. The current increases nonlinearly with increasing the bias voltage. Electrical breakdowns occur with a current typically as large as 10(1)-10(2) nA. Furthermore, some FN plots exhibit a bend presumably due to the formation of a heavily distorted nanotube of carbon.
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205
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Takeda S, Arashima Y, Kato K, Ogawa M, Kono K, Watanabe K, Saito T. A Case of Pasteurella haemolytica Sepsis in a Patient with Mitral Valve Disease who Developed a Splenic Abscess. ACTA ACUST UNITED AC 2010; 35:764-5. [PMID: 14606620 DOI: 10.1080/00365540310016385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We report a patient with sepsis caused by Pasteurella haemolytica, an extremely rare etiologic agent of human infection, who had mitral valve disease and developed a splenic abscess.
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206
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Taniguchi K, Katagiri K, Kashiwagi H, Harada S, Sugimoto Y, Shimizu Y, Arakawa H, Ito T, Yamazaki M, Watanabe T, Kato A, Hoshino E, Takahashi T, Esaki T, Suzuki M, Takeda S, Ichikawa F, Harada A, Sekiguchi N, Ishigai M, Kawata H, Yoneya T, Onuma E, Sudoh M, Aoki Y. A novel nonsecosteroidal VDR agonist (CH5036249) exhibits efficacy in a spontaneous benign prostatic hyperplasia beagle model. J Steroid Biochem Mol Biol 2010; 121:204-7. [PMID: 20304062 DOI: 10.1016/j.jsbmb.2010.03.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 03/09/2010] [Accepted: 03/11/2010] [Indexed: 11/17/2022]
Abstract
To date, there have been no reports showing the efficacy of nonsecosteroidal vitamin D receptor (VDR) agonists in a benign prostatic hyperplasia (BPH) animal model. To examine the efficacy of CH5036249, a novel nonsecosteroidal VDR agonist, we orally administered the compound at 0.03 microg/kg to a beagle model with spontaneous BPH. Prostate volume was checked by rectal ultrasonic probe periodically during 11 months of administration and the prostate tissues histologically examined. CH5036249 inhibited prostate growth in two out of three dogs compared with vehicle-treated dogs. In the prostate specimens, substantial atrophy of the epithelium was observed in all dogs administered CH5036249. At the dose given, serum calcium levels slightly increased in the CH5036249-treated dogs but stayed within a normal range. We next examined the cell growth inhibition of CH5036249 using human prostate stromal cells and found the cell growth inhibitory activity of CH5036249 to be comparable to that of 1alpha,25(OH)2D3. The bioavailability from oral administration in rats was 95.1% with a t1/2 of 17.6 h. Both micro-AMES and micronucleus tests were negative. Although the results are still preliminary, we consider the novel nonsecosteroidal VDR agonist CH5036249 to be a possible new drug candidate for the treatment of BPH in humans.
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207
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Ueyama K, Ikeda K, Sato W, Nakasato N, Horie-Inoue K, Takeda S, Inoue S. Knockdown of Efp by DNA-modified small interfering RNA inhibits breast cancer cell proliferation and in vivo tumor growth. Cancer Gene Ther 2010; 17:624-32. [PMID: 20467453 DOI: 10.1038/cgt.2010.19] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The estrogen-responsive gene Efp promotes the growth of breast cancer cells by stimulating the degradation of a negative cell-cycle regulator, 14-3-3sigma, and is hence considered a suitable molecular target for breast cancer therapy. The use of small interfering RNA (siRNA) and its derivatives to silence cancer-related genes is being investigated with the aim of identifying clinical applications for these molecules. Recently, it has been shown that DNA-modified siRNA (chimeric siRNA) has good potential in clinical applications, because it induces fewer off-target effects or immune responses in mammalian cells. In the present study, we identified the most specific and effective siRNA (siEfp-1) for silencing Efp expression in MCF-7 breast cancer cells. For this purpose, we used an algorithm that primarily eliminates off-target effects. siEfp-1 considerably suppressed the in vitro proliferation and cell-cycle progression of MCF-7 cells, as well as the in vivo growth of MCF-7 tumors, in athymic mice. DNA-modified siEfp-1 (chimeric siEfp) significantly inhibited the expression of Efp, proliferation of cultured cells and the in vivo growth of MCF-7-derived tumors in athymic mice. In addition, the silencing of Efp expression by siEfp-1 and chimeric siEfp increased the expression of the 14-3-3sigma protein. These results suggest that siEfp-1 and chimeric siEfp could be useful in breast cancer therapy. Chimeric siEfp, in particular, has a high specificity and induces few side effects and is therefore expected to be used as a novel nucleic acid-based therapeutic agent.
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208
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Nakamura A, Takeda S. [Exon skipping therapy for Duchenne muscular dystrophy: outcome of preclinical study and prospective for clinical study]. NO TO HATTATSU = BRAIN AND DEVELOPMENT 2010; 42:117-123. [PMID: 23858595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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209
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Oura M, Kobayashi N, Yamamori S, Takeda S, Iwasaki K, Umezu M. Calibration system for pulse spectrophotometry using a double-layer pulsation flow-cell. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2009; 2009:896-9. [PMID: 19965131 DOI: 10.1109/iembs.2009.5334889] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We have studied noninvasive devices for measuring total hemoglobin and hemoglobin derivatives such as carboxyhemoglobin (COHb) and methemoglobin (MetHb). A calibration procedure needs to be developed to evaluate or calibrate these devices and pulse oximeters for clinical practice. However, people and animals are sometimes exposed to risk when they are used for calibration. In this paper, we propose a new in vitro calibration system for a pulse photometer. This system has a novel double-layer pulsation flow-cell that incorporates both venous and arterial blood flow. Using the calibration system, we are able to measure the in vitro pulsatile optical density ratio (Phivt). The measured Phivt agrees well with the in vivo pulsatile optical density ratio (Phivi). This system simulates an in vivo environment with high accuracy and enables safe calibration. Consequently, the calibration system is able to standardize the performance and accuracy of pulse photometry.
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210
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Kohno H, Mori Y, Ichikawa S, Ohno Y, Yonenaga I, Takeda S. Transformation of a SiC nanowire into a carbon nanotube. NANOSCALE 2009; 1:344-346. [PMID: 20648271 DOI: 10.1039/b9nr00163h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A SiC nanowire can be transformed into a carbon nanotube or a SiC-C core-sheath nanowire owing to Joule heating by applying a current typically on the order of 10 muA, and the transformation can be observed in situ by means of transmission electron microscopy.
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211
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Yoshida H, Shimizu T, Uchiyama T, Kohno H, Homma Y, Takeda S. Atomic-scale analysis on the role of molybdenum in iron-catalyzed carbon nanotube growth. NANO LETTERS 2009; 9:3810-5. [PMID: 19731921 DOI: 10.1021/nl9019903] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We have elucidated the synergetic role played by molybdenum in iron-catalyzed chemical vapor deposition growth of carbon nanotubes (CNTs) by in situ environmental transmission electron microscopy. Molybdenum can be well accommodated by Fe-based carbide nanoparticle catalysts of M(23)C(6)-type structure (M = Fe and Mo). We have also shown that molybdenum suppresses the nucleation of iron compounds that are known to exhibit no catalytic activity for the growth of CNTs.
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212
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Matsuoka S, Kitade M, Kikuchi I, Kumakiri J, Kuroda K, Kuroda M, Takeda S. Strategy of Cervical Myoma under Laparoscopy. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.473] [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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213
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Kuroda K, Kitade M, Kikuchi I, Kumakiri J, Matsuoka S, Kuroda M, Takeda S. Peritoneal Vascular Density of Endometriotic Peritoneal Lesions by Narrow Band Imaging System and Vascular Analysis Software, “solemioENDO”. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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214
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Takeda S. M.I.5 The dystrophic dogs as an excellent animal model of Duchenne muscular dystrophy (DMD). Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.007] [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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215
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Kumakiri J, Kitade M, Kikuchi I, Takeda S. Evaluation of post-operative scar and delivery outcome afer laproscopic myomectomy by second-look laparoscopy. Fertil Steril 2009. [DOI: 10.1016/j.fertnstert.2009.07.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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216
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Taniguchi M, Kanagawa M, Takeda S, Miyagoe-Suzuki SY, Takeda S, Endo T, Kobayashi K, Campbell K, Toda T. EM.O.2 Residual laminin-binding activity and enhanced dystroglycan glycosylation by LARGE in novel model mice to dystroglycanopathy. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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217
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Takeda S. T.I.4 Potential of muscle stem cells and cell therapy for Duchenne muscular dystrophy. Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.355] [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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218
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Yagi N, Takeda S, Matsumoto N, Okada K. VAJ/GFA1/CLO is involved in the directional control of floral organ growth. PLANT & CELL PHYSIOLOGY 2009; 50:515-527. [PMID: 19168457 DOI: 10.1093/pcp/pcp011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Flowers assume variant forms of reproductive structures, a phenomenon which may be partially due to the diversity among species in the shape and size of floral organs. However, the organ size and shape of flowers usually remain constant within a species when grown under the same environmental conditions. The molecular and genetic mechanisms that control organ size and shape are largely unknown. We isolated an Arabidopsis mutant, vajra-1 (vaj-1), exhibiting defects in the regulation of floral organ size and shape. In vaj-1, alterations in the size and shape of floral organs were caused by changes in both cell size and cell number. The vaj-1 mutation also affected the number of floral organs. In vaj-1, a mutation was found in GAMETOPHYTIC FACTOR 1 (GFA1)/CLOTHO (CLO), recently shown to be required for female gametophyte development. The VAJ/GFA1/CLO gene encodes a translational elongation factor-2 (EF-2) family protein, of which the human U5-116 kD and yeast Snu114p counterparts are U5 small nuclear ribonucleoprotein (snRNP)-specific proteins. A transient expression assay using Arabidopsis protoplasts revealed that VAJ protein co-localized with SC35, a serine/arginine-rich (SR) protein involved in pre-mRNA splicing. Our results showed that VAJ/GFA1/CLO has a novel role in the directional control of floral organ growth in Arabidopsis, possibly acting through pre-mRNA splicing.
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219
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Kato K, Yamada S, Sugimoto H, Kanazumi N, Nomoto S, Takeda S, Nakao A. QS473. Prognostic Impact of Pancreatic Cut Surface Status of Resected Intraductal Papillary Mucinous Neoplasm of the Pancreas. J Surg Res 2009. [DOI: 10.1016/j.jss.2008.11.788] [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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220
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Izawa T, Yamate J, Takeda S, Kumagai D, Kuwamura M. Cutaneous rhabdoid tumor in a cat. Vet Pathol 2008; 45:897-900. [PMID: 18984792 DOI: 10.1354/vp.45-6-897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Rhabdoid tumor is a highly aggressive neoplasm of unknown cellular origin in humans, usually occurring in the kidney and central nervous system of infants or children. In older patients, it occurs rarely in other organs, including the skin and soft tissues. A subcutaneous mass in a 13-year-old male mixed-breed cat was composed of nests or sheets of round to polygonal cells with glassy eosinophilic cytoplasmic inclusions. Immunohistochemically, many neoplastic cells expressed vimentin, localized to the cytoplasmic inclusions, whereas the cytoplasm of some neoplastic cells was diffusely positive for neuron-specific enolase, neurofilament, or S-100 protein. By electron microscopy, the cytoplasmic inclusions were found to be composed of aggregates of intermediate filaments. These findings are quite similar to the histologic, immunohistochemical, and ultrastructural features of human rhabdoid tumors and the few rhabdoid tumors reported in animals.
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221
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Miyai N, Arita M, Miyashita K, Morioka I, Takeda S. The influence of obesity and metabolic risk variables on brachial-ankle pulse wave velocity in healthy adolescents. J Hum Hypertens 2008; 23:444-50. [PMID: 19078989 DOI: 10.1038/jhh.2008.143] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Measurement of brachial-ankle pulse wave velocity (baPWV) is recognized as a simple and practical method for assessing arterial stiffness. We determined whether the baPWV of adolescents is affected by obesity and its associated metabolic risk variables. A cross-sectional sample of 754 apparently healthy adolescents (383 men and 371 women), aged 15-17 years, was recruited for this study. baPWV was measured by a simple automatic oscillometric technique. Adiposity measures, blood pressure, serum lipoproteins, fasting glucose and insulin were evaluated. The baPWV of the adolescents was significantly higher in men than in women and increased with age in both genders. After being statistically adjusted for age and gender, baPWV was significantly correlated with body mass index, percent body fat, waist-to-height ratio, systolic and diastolic blood pressures, mean arterial pressure, triglycerides, high-density lipoprotein cholesterol (HDL-C), atherogenic index, glucose, insulin, and homoeostasis model assessment of insulin resistance (HOMA-IR). In the multivariate regression analysis, mean arterial pressure, atherogenic index, HOMA-IR, systolic blood pressure and age were found to be significant determinants of baPWV (P<0.001). An increasing number of clustered risk variables, including high values (>gender-specific top quartiles) of waist-to-height ratio, mean arterial pressure, atherogenic index and HOMA-IR showed a graded association with baPWV (P<0.001 for trend). These results suggest that obesity and its associated metabolic abnormalities are important factors in the increased baPWV of adolescents and that baPWV may be useful in investigating early arterial wall changes in this population.
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222
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Kumakiri J, Takeuchi H, Kitade M, Kikuchi I, Takeda S. Prospective Evaluation for the Feasibility and Safety of Vaginal Birth after Laparoscopic Myomectomy. J Minim Invasive Gynecol 2008. [DOI: 10.1016/j.jmig.2008.09.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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223
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Kunieda T, Mitsuda N, Ohme-Takagi M, Takeda S, Aida M, Tasaka M, Kondo M, Nishimura M, Hara-Nishimura I. NAC family proteins NARS1/NAC2 and NARS2/NAM in the outer integument regulate embryogenesis in Arabidopsis. THE PLANT CELL 2008; 20:2631-42. [PMID: 18849494 PMCID: PMC2590734 DOI: 10.1105/tpc.108.060160] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2008] [Revised: 09/10/2008] [Accepted: 09/21/2008] [Indexed: 05/18/2023]
Abstract
Seed morphogenesis consists of embryogenesis and the development of maternal tissues such as the inner and outer integuments, both of which give rise to seed coats. We show that expression of chimeric repressors derived from NAC-REGULATED SEED MORPHOLOGY1 and -2 (NARS1 and NARS2, also known as NAC2 and NAM, respectively) caused aberrant seed shapes in Arabidopsis thaliana. Double knockout mutant nars1 nars2 exhibited abnormally shaped seeds; moreover, neither nars1 nor nars2 produced abnormal seeds, indicating that NARS1 and NARS2 redundantly regulate seed morphogenesis. Degeneration of the integuments in nars1 nars2 was markedly delayed, while that of the wild type occurred around the torpedo-shaped embryo stage. Additionally, nars1 nars2 showed a defect in embryogenesis: some nars1 nars2 embryos were developmentally arrested at the torpedo-shaped embryo stage. Unexpectedly, however, neither NARS1 nor NARS2 was expressed in the embryo at this stage, although they were found to be expressed in the outer integument. Wild-type pistils pollinated with nars1 nars2 pollen generated normal seeds, while the reverse crossing generated abnormal seeds. Taken together, these results indicate that NARS1 and NARS2 regulate embryogenesis by regulating the development and degeneration of ovule integuments. Our findings suggest that there is an intertissue communication between the embryo and the maternal integument.
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224
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Fukushima K, Murata M, Hachisuga M, Tsukimori K, Seki H, Takeda S, Kato K, Wake N. Gene Expression Profiles by Microarray Analysis during Matrigel-induced Tube Formation in a Human Extravillous Trophoblast Cell line: Comparison with Endothelial Cells. Placenta 2008; 29:898-904. [DOI: 10.1016/j.placenta.2008.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2008] [Revised: 07/31/2008] [Accepted: 07/31/2008] [Indexed: 01/20/2023]
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225
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Takeda S, Yoshida H, Uchiyama T, Kohno H. Structure determination of metallic nanoparticle catalysts by atomic scale in situenvironmental TEM. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308082950] [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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226
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Yoshida H, Takeda S, Uchiyama T, Kohno H, Homma Y. Atomic-scale in-situ observation of carbon nanotube growth from solid state iron carbide nanoparticles. NANO LETTERS 2008; 8:2082-6. [PMID: 18505300 DOI: 10.1021/nl080452q] [Citation(s) in RCA: 221] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We have first observed the nucleation and growth process of carbon nanotubes (CNTs) from iron carbide (Fe 3C) nanoparticles in chemical vapor deposition with C 2H 2 by in situ environmental transmission electron microscopy. Graphitic networks are formed on the fluctuating iron carbide nanoparticles, and subsequently CNTs are expelled from them. Our atomic scale observations suggest that carbon atoms diffuse through the bulk of iron carbide nanoparticles during the growth of CNTs.
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227
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Sato K, Yokota T, Ichioka S, Shibata M, Takeda S. Vasodilation of intramuscular arterioles under shear stress in dystrophin-deficient skeletal muscle is impaired through decreased nNOS expression. ACTA MYOLOGICA : MYOPATHIES AND CARDIOMYOPATHIES : OFFICIAL JOURNAL OF THE MEDITERRANEAN SOCIETY OF MYOLOGY 2008; 27:30-36. [PMID: 19108575 PMCID: PMC2859605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Duchenne muscular dystrophy (DMD) is a lethal X-linked disorder of striated muscle caused by the absence of dystrophin. Recently, impairment of vascular dilation under shear stress has been found in DMD, but the underlying molecular mechanism is not fully understood. Moreover, dilation of intramuscular arterioles, which may be a key to the molecular pathogenesis, has not been addressed yet. We examined dilation of arterioles in the mouse cremaster muscle under shear stress due to ligation. The vasodilation was significantly impaired in dystrophin-deficient mdx mice as well as in neuronal nitric oxide synthase (nNOS)-deficient mice; however, neither endothelial NOS-deficient mice nor alpha1-syntrophin-deficient mice showed any difference in vasodilation from control mice. These results indicate that nNOS is the main supplier of nitric oxide in shear stress-induced vasodilation in skeletal muscle, but that the sarcolemmal localization of nNOS is not indispensable for the function. In contrast, the response to acetylcholine or sodium nitroprusside was not impaired in mdx or nNOS-deficient mice, suggesting that pharmacological treatment using a vasoactive agent may ameliorate skeletal and cardiac muscle symptoms of DMD.
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228
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Abstract
The discovery that the brain controls bone remodelling has provided a new paradigm for our understanding of bone biology. This review summarises the genetic, molecular and physiological bases for the central control of bone remodelling and discusses the future directions of this new research field of neuroskeletal biology.
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229
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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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230
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Muto T, Yamazaki A, Takeda S, Sato Y. Effect of bilateral sagittal split ramus osteotomy setback on the soft palate and pharyngeal airway space. Int J Oral Maxillofac Surg 2008; 37:419-23. [DOI: 10.1016/j.ijom.2007.12.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2006] [Revised: 11/29/2007] [Accepted: 12/17/2007] [Indexed: 10/22/2022]
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231
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Macpherson N, Takeda S, Shang Z, Dark A, Mortimer JC, Brownlee C, Dolan L, Davies JM. NADPH oxidase involvement in cellular integrity. PLANTA 2008; 227:1415-8. [PMID: 18317797 DOI: 10.1007/s00425-008-0716-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2007] [Accepted: 02/15/2008] [Indexed: 05/06/2023]
Abstract
NADPH oxidase activity is involved in plant adaptation and development. The reactive oxygen species sourced by NADPH oxidase activity may contribute to wall strength and protoplast volume adjustment. Root hair bulge apices of the NADPH oxidase mutant rhd2/Atrbohc were more robust than the kjk cellulose synthase mutant, but burst more readily than the wild type (WT). Root epidermal wall appeared impaired in rhd2/Atrbohc, as revealed by the number of protoplasts released by wall-degrading enzymes. Root hair bulges of rhd2/Atrbohc burst more than the WT when challenged in situ with hypo-osmotic low ionic strength medium. Inhibition of NADPH oxidase activity with diphenylene iodonium caused WT to phenocopy the rhd2/Atrbohc bursting in response to hypo-osmotic shock. This implicates RHD2/AtRBOHC in softening the cell wall to permit protoplast expansion. Overall, the results point to a role for RHD2/AtRBOHC in contributing to wall strength.
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Takeda S, Kaneoka H, Saito T. Effect of alendronate on glucocorticoid-induced osteoporosis in Japanese women with systemic autoimmune diseases: versus alfacalcidol. Mod Rheumatol 2008; 18:271-6. [PMID: 18427724 DOI: 10.1007/s10165-008-0055-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Accepted: 02/07/2008] [Indexed: 11/30/2022]
Abstract
Glucocorticoids-induced osteoporosis is a serious problem for patients with systemic autoimmune disease requiring relatively long-term glucocorticoid treatment. Effectiveness of alendronate for the prevention of glucocorticoids-induced osteoporosis was evaluated in comparison with that of alfacalcidol in Japanese women with autoimmune disease excluding rheumatoid arthritis. Loss of bone mass was evaluated with bone mineral density (BMD) of lumber vertebrae, bone resorption was with urinary N-telopeptide for type I collagen (NTX), and bone formation was with serum bone-specific alkaline phosphatase (B-ALP). A total of 33 patients who were treated with oral glucocorticoids (>or=5 mg/day of prednisolone equivalence) for more than 6 months were randomized into two groups; alendronate group (n = 17) received 5 mg/day of alendronate, and alfacalcidol group (n = 16) received 1.0 mug/day of alfacalcidol for 24 months with glucocorticoids. The dose of alendronate was the maximal dose approved in Japan. BMD had tendency to decrease with alfacalcidol, while increase with alendronate. The difference in BMD change between the two groups was significant by 4.3% at 18 months and by 4.2% at 24 months (both P < 0.05). Bone resorption was significantly reduced only with alendronate; NTX was decreased by 28 to 35% at 6 to 24 months (P < 0.05), but not changed with alfacalcidol at 24 months. The bone formation was found to be unchanged according to the B-ALP measured between the two groups. In conclusion, the treatment of 5 mg alendronate daily is more effective than alfacalcidol for preventing the glucocorticoid-induced osteoporosis by the mechanism of reducing bone resorption in Japanese women with systemic autoimmune disease.
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Komuro K, Nakanishi Y, Iwashiro N, Ohara M, Ishizaka M, Takeda S, Kaneko R, Ogasawara Y, Yonezawa K. Examination of sentinel lymph node in breast cancer by the combination of computed tomography lymphography, blue dye method and fluorescence navigation. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)70492-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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234
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Takeda S, Gapper C, Kaya H, Bell E, Kuchitsu K, Dolan L. Local Positive Feedback Regulation Determines Cell Shape in Root Hair Cells. Science 2008; 319:1241-4. [DOI: 10.1126/science.1152505] [Citation(s) in RCA: 416] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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235
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Ishii A, Takeda S, Hattori S, Sueoka K, Mukasa K. Ultrasensitive detection of organophosphate insecticides by carbon nanotube field-effect transistor. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.05.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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236
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Oura M, Kobayashi N, Takeda S, Iwasaki K, Umezu M. Development of a compact mock circulation system and a new flow-cell model for pulse spectrophotometry. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2008; 2008:670-673. [PMID: 19162744 DOI: 10.1109/iembs.2008.4649241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We have developed an extremely compact mock circulation system. This system can simulate artery blood circulation and generate a pulse wave with a very small amount of blood. We were also able to measure the in vitro pulsatile optical density ratio (Phivt) using this system with a flow cell [1]. Results showed a difference between Phivt and the in vivo pulsatile optical density ratio (Phivi) for the same oxygen saturations. To explain this difference, we proposed a new flow-cell model that includes venous flow and arterial flow. Because these systems can simulate the in vivo environment with very accurately, they can be applied to various pulse spectrophotometry studies. Moreover, the required blood volume is very small so the system can evaluate artificial blood or artificial red cells at very low cost. Thus, this system can reduce the time and cost of developing new pulse photometry techniques and other medical equipment.
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Nomoto S, Kinoshita T, Kato K, Otani S, Kasuya H, Takeda S, Kanazumi N, Sugimoto H, Nakao A. Hypermethylation of multiple genes as clonal markers in multicentric hepatocellular carcinoma. Br J Cancer 2007; 97:1260-5. [PMID: 17968429 PMCID: PMC2360457 DOI: 10.1038/sj.bjc.6604016] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is highly malignant and prone to multicentric occurrence. Differentiation between a true relapse of HCC and a second primary tumour appearing is of clinical importance. At this point, no convenient method is available to determine the origin of these HCCs. Tissue samples were obtained from 19 patients and analysed for the promoter hypermethylation status of multiple tumour suppressor genes (p16, DAP-Kinase, MGMT, GSTP1, APC, RIZ1, SFRP1, SFRP2, SFRP5, RUNX3, and SOCS1) using methylation-specific PCR (MSP). Methylation status was used to determine tumour clonality. In each of the 19 cases, at least one tumour was recognised as having an aberrantly methylated gene. The frequency of the methylation in tumour tissue was 57.1% in p16, 2.4% in DAP-kinase, 23.8% in GSTP1, 90.5% in APC, 45.2% in RIZ1, 64.3% in SFRP1, 59.5% in SFRP2, 28.6% in SFRP5, 47.6% in RUNX3, and 54.8% in SOCS1, while in MGMT, no aberrant methylation was detected. The methylation status of these genes was assessed using MSP as being either positive or negative, and was used to determine the tumour clonality. The clonality of every tumour could be decided even with lesions that could not be judged by clinical diagnosis or by another molecular method (mt DNA mutation). Determining the methylation status of multiple genes in multicentric HCC was useful as a clonal marker and provided useful information for characterising the tumour. From our findings, multicentric HCCs tend to occur more independently than metastatically from the original tumour. Expanded study should be pursued further for a better understanding of the molecular mechanism of hepatocarcinogenesis.
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238
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Kohno H, Takeda S. Non-Gaussian fluctuation in the charge transport of Si nanochains. NANOTECHNOLOGY 2007; 18:395706. [PMID: 21730431 DOI: 10.1088/0957-4484/18/39/395706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The stability of the tunneling charge transport of a tangle of Si nanochains is investigated at high bias voltages using a micromanipulator in a scanning electron microscope. We confirm that the influence of electron injection due to the electron beam of a scanning electron microscope on the charge transport properties of nanochains is negligible when the electrode gap is small and the bias voltage is large. Under such conditions, current-time curves show large fluctuations. We find that the fluctuation is not a simple Brownian motion, but its distribution function can be fitted well by a Lévy distribution. Its origin is discussed in terms of percolation theory.
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239
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Miyagoe-Suzuki Y, Miyamoto K, Saito F, Matsumura K, Manya H, Endo T, Takeda S. C.P.3.12 POMGnT1-null myoblasts poorly proliferate in vitro. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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240
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Partridge T, Yokota T, Lu Q, Hoffman E, Alter J, Takeda S, Kobayashi M, Nakamura A. T.O.2 Systemic delivery of morpholino oligonucleotides to skip mutations in the dystrophin gene of the mouse and dog. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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241
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Saito M, Okubo M, Hirata R, Takeda S, Maeda H. Association of human leukocyte antigen and T cell message with human papillomavirus 16–positive cervical neoplasia in Japanese women. Int J Gynecol Cancer 2007; 17:1314-21. [PMID: 17433060 DOI: 10.1111/j.1525-1438.2007.00938.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
To investigate whether an association exists between human leukocyte antigen (HLA) haplotype and cervical neoplasia within the Japanese population, we analyzed the human papillomavirus (HPV) genotypes, the HLA class I specificities and class II alleles, and the T-cell responses in the lesions of patients with cervical neoplasia. Eighty-one patients, consisting of 62 cervical intraepithelial neoplasia (CIN) lesions and 19 invasive cervical cancers (ICC), were examined. The frequencies of HPV infection in the CIN I/II and CIN III/ICC groups were 68.0% (17/25) and 80.4% (45/56), respectively. All patients and 138 local Japanese controls were analyzed for HLA-A, HLA-B, HLA-DRB1, and HLA-DQB1. For major histocompatibility complex (MHC) class II HLA-DRB1 alleles, the frequency of DRB1*0901 was significantly elevated in HPV 16–positive CIN III/ICC patients compared with controls (59.3% versus 29.7%, P= 0.0031, OR = 3.44). Similarly for the HLA-DQB1 alleles, a significant increase in the DQB1*03032 frequency was observed in HPV 16–positive CIN III/ICC patients compared with controls (59.3% versus 28.3%, P= 0.0018, OR = 3.69). In the analysis of the T-cell responses in the lesions, Fas ligand was detected at a decreased frequency in HPV 16–positive CIN III/ICC patients with the HLA-DRB1*0901–DQB1*03032 haplotype. The presence of helper T cell–specific messenger RNAs in the cervical lesions supports an association among MHC class II, helper T cells, the immune response to HPV, and the development of cervical carcinoma. Accordingly, a specific MHC class II haplotype, DRB1*0901–DQB1*03032, may be a risk factor for cervical carcinoma in the Japanese population.
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242
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Yoshimura M, Nakamura A, Kobayashi M, Takeda S. G.P.1.13 Deflazacort induced severe skeletal muscle wasting and inguinal herniation in normal Beagle dogs. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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243
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Taniguchi M, Kurahashi H, Meno C, Taniguchi Y, Takeda S, Horie M, Otani H, Toda T. C.P.3.14 Basement membrane fragility underlies embryonic lethality in fukutin-null mice. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.374] [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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244
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Tokita Y, Satoh K, Sakaguchi M, Endoh Y, Mori I, Yuzurihara M, Sakakibara I, Kase Y, Takeda S, Sasaki H. The preventive effect of Daikenchuto on postoperative adhesion-induced intestinal obstruction in rats. Inflammopharmacology 2007; 15:65-6. [PMID: 17450444 DOI: 10.1007/s10787-006-1552-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The present study investigated the effect of Daikenchuto (DKT) on postoperative intestinal adhesion in rats. We evaluated the effects of DKT, constituent medical herbs and active compounds on talc-induced intestinal adhesion in rats and DKT-induced contractions using isolated guinea pig ileum. DKT significantly prevented adhesion formation, and this action was inhibited by pretreatment with atropine or ruthenium red. The constituent medical herbs, Zanthoxylum Fruit and Maltose Syrup Powder significantly prevented adhesion formation. Moreover, hydroxy sanshool (HS) prevented adhesion formation, and this action was inhibited by pretreatment with ruthenium red. In contrast, DKT-induced contractions were inhibited by tetrodotoxin, atropine, and capsazepine. These results suggested that DKT had a preventive action on postoperative adhesive intestinal obstruction, and that this action was mediated by sensory and cholinergic nerves. Furthermore, HS was found to be one of the active compound of DKT, and its action was mediated by sensory nerves.
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245
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Goto T, Takano M, Albergaria A, Briese J, Pomeranz KM, Cloke B, Fusi L, Feroze-Zaidi F, Maywald N, Sajin M, Dina RE, Ishihara O, Takeda S, Lam EWF, Bamberger AM, Ghaem-Maghami S, Brosens JJ. Mechanism and functional consequences of loss of FOXO1 expression in endometrioid endometrial cancer cells. Oncogene 2007; 27:9-19. [PMID: 17599040 DOI: 10.1038/sj.onc.1210626] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The forkhead transcription factor FOXO1, a downstream target of phosphatidylinositol-3-kinase/Akt signalling pathway, regulates cyclic differentiation and apoptosis in normal endometrium, but its role in endometrial carcinogenesis is unknown. Screening of endometrial cancer cell lines demonstrated that FOXO1 is expressed in HEC-1B cells, but not in Ishikawa cells, which in turn highly express the FOXO1 targeting E3-ubiquitin ligase Skp2. FOXO1 transcript levels were also lower in Ishikawa cells and treatment with the proteasomal inhibitor was insufficient to restore expression. Lack of FOXO1 expression in Ishikawa cells was not accounted for by differential promoter methylation or activity, but correlated with increased messenger RNA (mRNA) turnover. Comparative analysis demonstrated that HEC-1B cells proliferate slower, but are more resistant to paclitaxel-mediated cell death than Ishikawa cells, which were partially reversed upon silencing of FOXO1 in HEC-1B cells or its re-expression in Ishikawa cells. We further show that FOXO1 is required for the expression of the growth arrest- and DNA-damage-inducible gene GADD45alpha. Analysis of biopsy samples demonstrated a marked loss of FOXO1 and GADD45alpha mRNA and protein expression in endometrioid endometrial cancer compared to normal endometrium. Together, these observations suggest that loss of FOXO1 perturbs endometrial homeostasis, promotes uncontrolled cell proliferation and increases susceptibility to genotoxic insults.
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246
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Yuasa K, Yoshimura M, Urasawa N, Ohshima S, Howell JM, Nakamura A, Hijikata T, Miyagoe-Suzuki Y, Takeda S. Injection of a recombinant AAV serotype 2 into canine skeletal muscles evokes strong immune responses against transgene products. Gene Ther 2007; 14:1249-60. [PMID: 17581597 DOI: 10.1038/sj.gt.3302984] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Using murine models, we have previously demonstrated that recombinant adeno-associated virus (rAAV)-mediated microdystrophin gene transfer is a promising approach to treatment of Duchenne muscular dystrophy (DMD). To examine further therapeutic effects and the safety issue of rAAV-mediated microdystrophin gene transfer using larger animal models, such as dystrophic dog models, we first investigated transduction efficiency of rAAV in wild-type canine muscle cells, and found that rAAV2 encoding beta-galactosidase effectively transduces canine primary myotubes in vitro. Subsequent rAAV2 transfer into skeletal muscles of normal dogs, however, resulted in low and transient expression of beta-galactosidase together with intense cellular infiltrations in vivo, where cellular and humoral immune responses were remarkably activated. In contrast, rAAV2 expressing no transgene elicited no cellular infiltrations. Co-administration of immunosuppressants, cyclosporine and mycophenolate mofetil could partially improve rAAV2 transduction. Collectively, these results suggest that immune responses against the transgene product caused cellular infiltration and eliminated transduced myofibers in dogs. Furthermore, in vitro interferon-gamma release assay showed that canine splenocytes respond to immunogens or mitogens more susceptibly than murine ones. Our results emphasize the importance to scrutinize the immune responses to AAV vectors in larger animal models before applying rAAV-mediated gene therapy to DMD patients.
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MESH Headings
- Animals
- Base Sequence
- Calmodulin/genetics
- Cyclosporine/administration & dosage
- Dependovirus/genetics
- Dogs
- Dystrophin/genetics
- Dystrophin/metabolism
- Genetic Engineering
- Genetic Therapy/adverse effects
- Genetic Therapy/methods
- Genetic Vectors/adverse effects
- Genetic Vectors/genetics
- Immunosuppressive Agents/administration & dosage
- Injections, Intramuscular
- Interferon-gamma/immunology
- Lymphocyte Activation
- Mice
- Mice, Inbred C57BL
- Models, Animal
- Molecular Sequence Data
- Muscle Fibers, Skeletal/immunology
- Muscle Fibers, Skeletal/virology
- Muscle, Skeletal/immunology
- Muscular Dystrophy, Animal/immunology
- Muscular Dystrophy, Animal/therapy
- Muscular Dystrophy, Duchenne/immunology
- Muscular Dystrophy, Duchenne/therapy
- Parvoviridae Infections/immunology
- RNA, Messenger/analysis
- Reverse Transcriptase Polymerase Chain Reaction
- Species Specificity
- T-Lymphocytes, Cytotoxic/immunology
- Transduction, Genetic/methods
- Transgenes
- beta-Galactosidase/genetics
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247
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Kasuya H, Nishiyama Y, Nomoto S, Goshima F, Takeda S, Watanabe I, Nomura N, Shikano T, Fujii T, Kanazumi N, Nakao A. Suitability of a US3-inactivated HSV mutant (L1BR1) as an oncolytic virus for pancreatic cancer therapy. Cancer Gene Ther 2007; 14:533-42. [PMID: 17415379 DOI: 10.1038/sj.cgt.7701049] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Recently, the use of oncolytic viruses against cancer has attracted considerable attention. We studied the potential of the US3 locus-deficient herpes simplex virus (HSV), L1BR1, for oncolytic virus therapy. Its high specificity and potency indicate that L1BR1 is a promising candidate as a new oncolytic virus against pancreatic cancer. Moreover, the virus exhibited the unique characteristic of increasing apoptosis when used in combination with anticancer drugs. We assessed the feasibility of using the US3 locus-deficient HSV named L1BR1 as a new replication-competent oncolytic virus for the treatment of pancreatic cancer. The US3 locus of HSV has been shown to be a key gene in producing a multifunctional protein kinase that inhibits apoptosis induced by viral infections, chemicals and ultraviolet (UV) light. L1BR1 has been reported to be more than 10 000-fold less virulent than the parental virus in mice. In this study, we examined the tumor specificity and oncolytic effect of this attenuated replication-competent virus, L1BR1, in pancreatic cancers derived from SW1990, Capan2 and Bxpc-3cells compared with the parent virus and other well-known oncolytic herpes viruses (R3616 and hrR3). We also studied the efficacy of L1BR1 for the induction of apoptosis as an attribute of this virus in combination with the anticancer drugs 5FU and cisplatin. The combined treatment of the pancreatic cancer cells with L1BR1 and these anticancer drugs enhanced apoptosis significantly. More importantly, L1BR1 showed the lowest replication capacity in normal human hepatocytes, but the highest tumor-reducing effect in vivo among the oncolytic herpes viruses tested. In addition, L1BR1 significantly increased the induction of apoptosis of cancer cells when treated in combination with anticancer drugs although the parental virus inhibited the induction of apoptosis. These results suggest that L1BR1 is promising as a new anticancer oncolytic virus.
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248
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Nakamura C, Miyamoto C, Obataya I, Takeda S, Yabuta M, Miyake J. Enzymatic nanolithography of FRET peptide layer using V8 protease-immobilized AFM probe. Biosens Bioelectron 2007; 22:2308-14. [PMID: 17270416 DOI: 10.1016/j.bios.2006.12.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2006] [Revised: 12/13/2006] [Accepted: 12/15/2006] [Indexed: 11/22/2022]
Abstract
In our study, a method based on Enzymatic nanolithography was successfully performed in a buffered solution using Staphylococcal serine V8 protease and AFM. To estimate the lithographing activity of the protease immobilized on the AFM tip to peptides immobilized on a substrate, we designed fluorescence resonance energy transfer (FRET) peptides as reporter peptides that showed enzymatic action specific to the V8 protease. When the protease digested the reporter peptide a quencher residue was released from the peptide and resulted in the appearance of fluorescence. In the designed 9-mer peptides, TAMRA functioned as a good quencher for FAM. When the fluorescence resonance energy transfer peptides immobilized on a glass substrate were hydrolyzed by V8 protease at the C-terminal of glutamic acid, fluorescence of a reporter dye was observed because of the release of a quencher from the substrate. After contacting and lateral scanning of the protease-immobilized AFM tip to the reporter peptide layer, a fluorescent area was observed by imaging using total internal refection fluorescence microscopy (TIRFM). The increment of fluorescence intensity of the digested peptide indicates the performance of lithography. Lithographing rates increased in inverse relation to scanning rates of the probe. The maximum limit of the scanning rate, i.e., that was too fast to permit cutting of the peptide on the substrate, and the lithographing performance are discussed in this study.
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249
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Kasuya H, Takeda S, Shimoyama S, Shikano T, Nomura N, Kanazumi N, Nomoto S, Sugimoto H, Nakao A. Oncolytic virus therapy--foreword. Curr Cancer Drug Targets 2007; 7:123-5. [PMID: 17346102 DOI: 10.2174/156800907780058826] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We are very pleased and proud to be able to publish this special issue of Current Cancer Drug Targets devoted to oncolytic virus therapy covering basic and clinical research on adenovirus, vaccinia virus, herpes virus, and Newcastle disease virus. In these papers, we welcome the world's top authorities in the field who have generously contributed their latest review articles for exclusive publication in this special issue. Moreover, this issue also includes a range of opinion from government drug organizations. Here we simply wish to bring together the newest knowledge and experience in the field of cutting-edge oncolytic virus therapy for researchers and every kind of cancer therapist. The Foreword presents a historical perspective on the development of oncolytic virus together with the encouraging results of recent clinical trials (e.g., H101 has been tested in clinical trial of nearly 250 patients and approved for human use by the Chinese FDA, while PV701 has been tried in over 110 patients, as described in our special issue).
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250
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Takeda S, Nakamura M, Ishii A, Subagyo A, Hosoi H, Sueoka K, Mukasa K. A pH sensor based on electric properties of nanotubes on a glass substrate. NANOSCALE RESEARCH LETTERS 2007; 2:207-212. [PMID: 21806848 PMCID: PMC3246224 DOI: 10.1007/s11671-007-9053-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2006] [Accepted: 03/05/2007] [Indexed: 05/27/2023]
Abstract
We fabricated a pH-sensitive device on a glass substrate based on properties of carbon nanotubes. Nanotubes were immobilized specifically on chemically modified areas on a substrate followed by deposition of metallic source and drain electrodes on the area. Some nanotubes connected the source and drain electrodes. A top gate electrode was fabricated on an insulating layer of silane coupling agent on the nanotube. The device showed properties of ann-type field effect transistor when a potential was applied to the nanotube from the top gate electrode. Before fabrication of the insulating layer, the device showed that thep-type field effect transistor and the current through the source and drain electrodes depend on the buffer pH. The current increases with decreasing pH of the CNT solution. This device, which can detect pH, is applicable for use as a biosensor through modification of the CNT surface.
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