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Iwama M, Tokoro F, Tanaka S, Matsuoka R, Kojima T, Yagasaki H, Iida M, Arai M, Noda T, Watanabe S. Improvement of left ventricular function after successful chronic total occlusion recanalization in patients with evidence of ischemia by stress myocardial perfusion imaging. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Maruoka D, Arai M, Kishimoto T, Matsumura T, Inoue M, Nakagawa T, Watanabe Y, Katsuno T, Tsuyuguchi T, Imazeki F, Yokosuka O. Clinical outcomes of endoscopic resection for nonampullary duodenal high-grade dysplasia and intramucosal carcinoma. Endoscopy 2013; 45:138-41. [PMID: 23322475 DOI: 10.1055/s-0032-1325799] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study retrospectively analyzed the clinical outcomes of endoscopic resection of 26 sporadic (i. e., not associated with polyposis syndrome) nonampullary duodenal lesions representing high-grade dysplasia or intramucosal carcinoma (duodenal HGD/IMC) in 23 patients. No severe complications such as perforation were observed, but three cases of delayed bleeding were seen. The use of endoscopic clips significantly decreased the delayed bleeding rate (0/19, 0%) compared with cases in which clips were not used (3/7, 42.9%; P = 0.013, χ2 test). Eighteen lesions (69.2%) were removed by en bloc resection. The follow-up period after resection was 25.5 ± 23.3 months. Two lesions (7.7%) that recurred locally were detected at the first surveillance endoscopy 3 months after resection. These lesions were 22 and 15 mm in size respectively and were resected piecemeal. Endoscopic resection is an effective and safe procedure for treating duodenal HGD/IMC. En bloc resection and prophylactic clip usage are encouraged.
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Kaneta A, Araki T, Taira M, Aomori T, Nagano D, Arai M, Nakamura T, Kurabayashi M, Yamamoto K. CPC-009 Administration of Dabigatran Removed from the Capsule. Eur J Hosp Pharm 2013. [DOI: 10.1136/ejhpharm-2013-000276.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Jin H, Shinotsuka H, Yoshikawa H, Iwai H, Arai M, Tanuma S, Tougaard S. Evaluation of robustness to surface conditions of the target factor analysis method for determining the dielectric function from reflection electron energy loss spectra: Application to GaAs. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5196] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kiyanagi Y, Shinohara T, Kai T, Kamiyama T, Sato H, Kino K, Aizawa K, Arai M, Harada M, Sakai K, Oikawa K, Ooi M, Maekawa F, Iikura H, Sakai T, Matsubayashi M, Segawa M, Kureta M. Present Status of Research on Pulsed Neutron Imaging in Japan. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.phpro.2013.03.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Saito K, Katsuno T, Nakagawa T, Saito M, Sazuka S, Sato T, Matsumura T, Arai M, Miyauchi H, Matsubara H, Yokosuka O. Predictive factors of response to intravenous ciclosporin in severe ulcerative colitis: the development of a novel prediction formula. Aliment Pharmacol Ther 2012; 36:744-54. [PMID: 22957944 DOI: 10.1111/apt.12033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 05/15/2012] [Accepted: 08/10/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND When treating patients with severe ulcerative colitis (UC), accurate prediction of drug efficacy contributes to early clinical decision-making. AIM To identify predictive factors and to develop a reliable prediction formula and a decision tree of response to intravenous ciclosporin treatment for severe UC. METHODS Patients included in this study were those diagnosed with refractory severe UC who had undergone ciclosporin treatment between December 2004 and March 2011 at a tertiary referral centre in Japan. Demographic and clinical parameters from all patients were analysed by multivariate statistics. RESULTS Fifty-two patients were included in this study (36.5% men with an average age of ciclosporin initiation of 40.2 ± 15.6 years). Thirty-four patients (65.4%) were responders to the treatment with ciclosporin and avoided colectomy, 18 patients (34.6%) were nonresponders and underwent colectomy. Stepwise multiple logistic regression analysis identified four independent predictive factors of response to intravenous ciclosporin: age at hospitalisation (AGE), platelet count (×10(4) /μL) on the first day (PLA), Lichtiger score on the third day (LIC) and total protein (g/dL) on the third day minus total protein on the first day (ΔTP). The calculation formula (8.5 - 0.16 × AGE + 0.21 × PLA - 0.61 × LIC + 2.3 × ΔTP < 0) predicted colectomy with an accuracy of 88.5% and the decision tree predicted colectomy with an accuracy of 90.4%. CONCLUSION The novel calculation formula and the decision tree effectively predict the clinical outcome of ciclosporin treatment for severe ulcerative colitis as early as on day 3 after starting ciclosporin treatment.
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Sazuka S, Katsuno T, Nakagawa T, Saito M, Saito K, Matsumura T, Arai M, Sato T, Yokosuka O. Concomitant use of enteral nutrition therapy is associated with sustained response to infliximab in patients with Crohn’s disease. Eur J Clin Nutr 2012; 66:1219-23. [DOI: 10.1038/ejcn.2012.120] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Yamamoto K, Uchida S, Kitano K, Fukuhara N, Okumura-Kitajima L, Gunji E, Kozakai A, Tomoike H, Kojima N, Asami J, Toyoda H, Arai M, Takahashi T, Takahashi K. TS-071 is a novel, potent and selective renal sodium-glucose cotransporter 2 (SGLT2) inhibitor with anti-hyperglycaemic activity. Br J Pharmacol 2012; 164:181-91. [PMID: 21410690 DOI: 10.1111/j.1476-5381.2011.01340.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE The renal sodium-glucose cotransporter 2 (SGLT2) plays an important role in the reuptake of filtered glucose in the proximal tubule and therefore may be an attractive target for the treatment of diabetes mellitus. This study characterizes the pharmacological profile of TS-071 ((1S)-1,5-anhydro-1-[5-(4-ethoxybenzyl)-2-methoxy-4-methylphenyl]-1-thio-D-glucitol hydrate), a novel SGLT2 inhibitor in vitro and in vivo. EXPERIMENTAL APPROACH Inhibition of glucose uptake by TS-071 was studied in CHO-K1 cells stably expressing either human SGLT1 or SGLT2. Single oral dosing studies were performed in rats, mice and dogs to assess the abilities of TS-071 to increase urinary glucose excretion and to lower plasma glucose levels. KEY RESULTS TS-071 inhibited SGLT2 activity in a concentration-dependent manner and was a potent and highly selective inhibitor of SGLT2. Orally administered TS-071 increased urinary glucose excretion in Zucker fatty rats and beagle dogs at doses of 0.3 and 0.03 mg·kg(-1) respectively. TS-071 improved glucose tolerance in Zucker fatty rats without stimulating insulin secretion and reduced hyperglycaemia in streptozotocin (STZ)-induced diabetic rats and db/db mice at a dose of 0.3 mg·kg(-1). CONCLUSION AND IMPLICATIONS These data indicate that TS-071 is a potent and selective SGLT2 inhibitor that improves glucose levels in rodent models of type 1 and 2 diabetes and may be useful for the treatment for diabetes mellitus.
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Maruoka D, Imazeki F, Arai M, Kanda T, Fujiwara K, Yokosuka O. Longitudinal changes of the laboratory data of chronic hepatitis C patients with sustained virological response on long-term follow-up. J Viral Hepat 2012; 19:e97-104. [PMID: 22239532 DOI: 10.1111/j.1365-2893.2011.01512.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
There is no study that follows up longitudinal changes in laboratory data of patients with C-viral chronic liver disease (C-CLD) who achieved sustained virological esponse (SVR) with interferon treatment in a long-term study. We investigated the laboratory data in a long-term retrospective cohort study of 581 patients with C-CLD who underwent liver biopsy between January 1986 and December 2005. 467 were treated with interferon and 207 of these patients achieved SVR with follow-up periods of 8.36 ± 5.13 years. Alanine aminotransferase (ALT) levels, albumin levels, platelet counts, and the aspartate aminotransferase (AST)-to-platelet ratio index (APRI) values were serially examined during the follow-up period. None of the 207 patients with SVR exhibited hepatitis C virus (HCV) RNA positivity more than 6 months after the end of IFN treatment. Platelet counts and albumin levels increased only in those with eradication of HCV. APRI values decreased more in patients with SVR than in those with nonsustained virological responses (non-SVR). Patients who achieved SVR and had fibrosis stage 0-1 and 2-4 at enrolment had platelet counts that longitudinally increased by 2.81 ± 3.95 and 5.49 ± 4.53 × 10(3) /μL during the 10-year follow-up period, respectively. Albumin levels continuously increased during the first 2 years by 0.15 ± 0.31 and 0.33 ± 0.37 in fibrosis stage 0-1 and 2-4, respectively and then plateaued. ALT levels decreased rapidly one year after the start of treatment by 110.3 ± 140.0 and 100.5 ± 123.4 in fibrosis 0-1 and 2-4, respectively. HCV RNA negativity persisted in all patients with SVR, and laboratory data including APRI longitudinally improved during the long-term follow-up period.
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Togo S, Arai M, Tawada A, Chiba T, Kanda T, Fujiwara K, Imazeki F, Yokosuka O. Clinical importance of serum hepatitis B surface antigen levels in chronic hepatitis B. J Viral Hepat 2011; 18:e508-15. [PMID: 21914070 DOI: 10.1111/j.1365-2893.2011.01486.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Quantitative serology for hepatitis B surface antigen (HBsAg) is a new candidate marker for prediction of clinical outcome. The aim of this study was to investigate the clinical significance of quantifying HBsAg in patients with hepatitis B virus (HBV) infection. A total of 424 patients who tested positive for HBsAg and were referred to Chiba University Hospital between January 1985 and April 2008 were included in the study, and the following characteristics were analyzed: age, gender, status of hepatitis B e antigen (HBeAg), alanine aminotransferase level (ALT), HBV DNA level, number of platelets and development of hepatocellular carcinoma. Measurement of HBsAg was performed using the chemiluminescent enzyme immunoassay method. The study group consisted of 239 men and 185 women, and their average age was 40.6 ± 14.0 years. HBsAg showed a positive correlation with HBV DNA level (Pearson's product moment correlation, r = 0.586, P < 0.001) and a weak inverse correlation with age (r = 0.3325, P < 0.001). A control study, matched with age and sex, was performed between two groups with and without HBeAg seroconversion during follow-up period. Compared with the age and sex-matched controls, the change in HBsAg levels per year showed a significant decrease 2 years before seroconversion (paired t-test, P < 0.05). The serial measurement of quantitative HBsAg level has the possibility of predicting the occurrence of HBeAg seroconversion.
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Nakamura M, Nakajima K, Inamura Y, Ohira Kawamura S, Kikuchi T, Otomo T, Arai M. A New Possibility of Dynamical Study on Solid State Ionic Materials by Inelastic Neutron Scattering. ATOM INDONESIA 2011. [DOI: 10.17146/aij.2010.33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Toyosima M, Maekawa M, Toyota T, Iwayama Y, Arai M, Ichikawa T, Miyashita M, Arinami T, Itokawa M, Yoshikawa T. Schizophrenia with the 22q11.2 deletion and additional genetic defects: case history. Br J Psychiatry 2011; 199:245-6. [PMID: 21881099 DOI: 10.1192/bjp.bp.111.093849] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The 22q11.2 deletion is the most prominent known genetic risk factor for schizophrenia, but its penetrance is at most approximately 50% suggesting that additional risk factors are required for disease progression. We examined a woman with schizophrenia with this deletion for such risk factors. She had high plasma pentosidine levels ('carbonyl stress') and a frameshift mutation in the responsible gene, GLO1. She also had a constant exotropia, so we examined the PHOX2B gene associated with both schizophrenia and strabismus, and detected a 5-alanine deletion. We propose that the combination of these genetic defects may have exceeded the threshold for the manifestation of schizophrenia.
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Kiyanagi R, Oikawa K, Tamura I, Ohhara T, Kawasaki T, Kaneko K, Kimura H, Takahashi M, Kiyotani T, Nakao A, Hanashima T, Munakata K, Arai M, Noda Y, Ohshima K. Construction of new time-of-flight single-crystal diffractometer SENJU at J-PARC. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311093524] [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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Tanaka H, Arai M, Harada M, Hozumi A, Hirata K. Cognition and event-related potentials in adult-onset non-demented myotonic dystrophy type 1. Clin Neurophysiol 2011; 123:261-9. [PMID: 21741303 DOI: 10.1016/j.clinph.2011.06.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 06/13/2011] [Accepted: 06/15/2011] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To clarify the cognitive and event-related potentials (ERPs) profiles of adult-onset genetically-proven non-demented myotonic dystrophy type 1 (DM1). METHODS Fourteen DM1 patients and matched 14 normal controls were enrolled. DM1 patients were compared with normal controls, using a variety of neuropsychological tests; an auditory "oddball" counting paradigm for the ERPs, and low-resolution brain electromagnetic tomography (LORETA). For patients, ERPs and neuropsychological parameters were correlated with CTG repeat size, duration of illness, grip strength, and arterial blood gas analysis. RESULTS Frontal lobe dysfunction, prolonged N1 latency, and attenuated N2/P3 amplitudes were observed in DM1. Longer CTG repeat size was associated with fewer categories achieved on Wisconsin Card Sorting Test. Greater grip strength was associated with better scores on color-word "interference" of Stroop test. P3 latency was negatively correlated with PaO(2). LORETA revealed significant hypoactivities at the orbitofrontal and medial temporal lobe, cingulate, and insula. There was no correlation between ERPs and CTG expansion. CONCLUSIONS Adult-onset non-demented DM1 presented frontal lobe dysfunction. Absence of correlations between CTG repeat size and objective ERP parameters suggested CTG expansion in lymphocytes does not directly contribute to cognitive dysfunction. SIGNIFICANCE CTG expansion in lymphocytes does not directly contribute to cognitive dysfunction of adult-onset non-demented DM1.
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Kanda T, Imazeki F, Yonemitsu Y, Mikami S, Takada N, Nishino T, Takashi M, Tsubota A, Kato K, Sugiura N, Tawada A, Wu S, Tanaka T, Nakamoto S, Mikata R, Tada M, Chiba T, Kurihara T, Arai M, Fujiwara K, Kanai F, Yokosuka O. Quantification of hepatitis C virus in patients treated with peginterferon-alfa 2a plus ribavirin treatment by COBAS TaqMan HCV test. J Viral Hepat 2011; 18:e292-7. [PMID: 21129130 DOI: 10.1111/j.1365-2893.2010.01409.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Extremely low levels of serum hepatitis C virus (HCV) RNA can be detected by COBAS TaqMan HCV test. To investigate whether the COBAS TaqMan HCV test is useful for measuring rapid virological response (RVR) and early virological response (EVR) to predict sustained virological response (SVR), we compared the virological response to PEG-IFN-alfa 2a plus RBV in 76 patients infected with HCV genotype 1 when undetectable HCV RNA by the COBAS TaqMan HCV test was used, with those when below 1.7 log IU/mL HCV RNA by COBAS TaqMan HCV test was used, which corresponded to the use of traditional methods. Among the 76 patients, 28 (36.8%) had SVR, 13 (17.1%) relapsed, 19 (25.0%) did not respond, and 16 (21.0%) discontinued the treatment due to side effects. The positive predictive values for SVR based on undetectable HCV RNA by COBAS TaqMan HCV test at 24 weeks after the end of treatment [10/10 (100%) at week 4, 21/23 (91.3%) at week 8 and 26/33 (78.7%) at week 12] were superior to those based on <1.7 log IU/mL HCV RNA [17/19 (89.4%) at week 4, 27/38 (71.0%) at week 8, and 27/43 (62.7%) at week 12]. The negative predictive values for SVR based on <1.7 log IU/mL HCV RNA by COBAS TaqMan HCV test [46/57 (80.7%) at week 4, 37/38 (97.3%) at week 8, and 32/33 (96.9%) at week 12] were superior to those based on undetectable HCV RNA [48/66 (72.7%) at week 4, 46/53 (86.7%) at week 8, and 41/43 (95.3%) at week 12]. The utilization of both undetectable RNA and <1.7 log IU/mL HCV RNA by COBAS TaqMan HCV test is useful and could predict SVR and non-SVR patients with greater accuracy.
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Kira H, Sakaguchi Y, Oku T, Suzuki J, Nakamura M, Arai M, Endoh Y, Chang LJ, Kakurai K, Arimoto Y, Ino T, Shimizu HM, Kamiyama T, Ohoyama K, Hiraka H, Tsutsumi K, Yamada K. Developments of In-Situ SEOP Polarized3He Neutron Spin Filter in Japan. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/294/1/012014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sakaguchi Y, Kira H, Oku T, Shinohara T, Suzuki J, Sakai K, Nakamura M, Suzuya K, Aizawa K, Arai M, Takeda M, Endoh Y, Chang LJ, Arimoto Y, Ino T, Shimizu HM, Kamiyama T, Ohoyama K, Hiraka H, Tsutsumi K, Yamada K, Ohara K, Kakurai K. Structure of glasses for3He neutron spin filter cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/294/1/012004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Teruya K, Sueda J, Arai M, Tsurumaru N, Yamakawa R, Hirata A, Hirose T. Patching retinal breaks with Seprafilm in experimental rhegmatogenous retinal detachment of rabbit eyes. Eye (Lond) 2011; 23:2256-9. [PMID: 19169237 DOI: 10.1038/eye.2008.403] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To examine the short-term effect of Seprafilm for patching retinal breaks in experimental rhegmatogenous retinal detachment of rabbit eyes. METHODS Experimental retinal detachment with a break was made and repaired by fluid-gas exchange during vitreous surgery in 10 rabbit eyes. In seven eyes, Seprafilm was applied to cover iatrogenic retinal breaks entirely (study group) and in other three eyes operations were finished without Seprafilm application (control group). Funduscopic examination was carried out in both groups and in study group optical coherence tomography (OCT) was performed to observe Seprafilm on the retinal break. Eyes of study group were enucleated on 7th and 14th postoperative day for histological evaluation. RESULTS The funduscopic examination showed that the retina was reattached in all eyes of study group. Meanwhile all three eyes of control group resulted in proliferative vitreoretinopathy. OCT showed that Seprafilm adhered to the retina tightly. Funduscopic examination and OCT showed Seprafilm dissolved within 14 days. Histological examination revealed that Seprafilm adhered tightly to the retina and there was no inflammatory change at the Seprafilm application sites. CONCLUSIONS In our small number of this study, Seprafilm was found to be beneficial to patch small and posteriorly located retinal breaks in vitreous surgery for rhegmatogenous retinal detachment.
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Arai M. [International collaboration of the NGO for Hansen's disease in China]. NIHON HANSENBYO GAKKAI ZASSHI = JAPANESE JOURNAL OF LEPROSY : OFFICIAL ORGAN OF THE JAPANESE LEPROSY ASSOCIATION 2010; 79:269-272. [PMID: 20857657 DOI: 10.5025/hansen.79.269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Abe J, Arakawa M, Hattori T, Arima H, Kagi H, Komatsu K, Sano-Furukawa A, Uwatoko Y, Matsubayashi K, Harjo S, Moriai A, Ito T, Aizawa K, Arai M, Utsumi W. A cubic-anvil high-pressure device for pulsed neutron powder diffraction. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2010; 81:043910. [PMID: 20441353 DOI: 10.1063/1.3384238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A compact cubic-anvil high-pressure device was developed for in situ neutron powder diffraction studies. In this device, a cubic shaped pressure medium is compressed by six anvils, and neutron beams pass through gaps between the anvils. The first high-pressure experiment using this device was conducted at J-PARC and clearly showed the neutron diffraction patterns of Pb. Combining the cubic-anvil high-pressure device with a pulsed neutron source will prove to be a useful tool for neutron diffraction experiments.
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Suzuki F, Yamaguchi J, Koba A, Nakajima T, Arai M. Changes in Fungicide Resistance Frequency and Population Structure of Pyricularia oryzae after Discontinuance of MBI-D Fungicides. PLANT DISEASE 2010; 94:329-334. [PMID: 30754249 DOI: 10.1094/pdis-94-3-0329] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The changes in fungicide resistance frequency and population structure of the rice blast fungus Pyricularia oryzae were monitored after the discontinuance of melanin biosynthesis inhibitor targeting scytalone dehydratase (MBI-D) fungicides use in Saga Prefecture, Japan. After discontinuance in 2003, the frequency of resistant isolates decreased from 71.8% in 2002 to 25% in 2003, and became undetectable in 2007. The initial marked decrease was due to a decline of isolates possessing the predominant haplotype, although the haplotypic diversity among resistant isolates remained high from 2003 to 2005. These results revealed that resistant isolates were less fit in comparison with sensitive isolates in the absence of MBI-D fungicide pressure under field conditions. Pairwise FST values indicated that the change in population structure after MBI-D discontinuance was explainable by a rapid change in the proportions of resistant and sensitive subpopulations. Depending upon the existence of fitness cost and rapid changes in population structure, it may be possible to reintroduce MBI-D fungicides in areas where resistance has already developed, although we speculate that fitness cost related to MBI-D resistance may be small based on our present results and previous findings.
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Sato Y, Nozawa S, Yoshiike M, Arai M, Sasaki C, Iwamoto T. Xenografting of testicular tissue from an infant human donor results in accelerated testicular maturation. Hum Reprod 2010; 25:1113-22. [DOI: 10.1093/humrep/deq001] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Shi Y, Guo Y, Yu S, Arai M, Belik A, Sato A, Yamaura K, Takayama-Muromachi E, Varga T, Mitchell J. High-pressure crystal growth and magnetic and electrical properties of the quasi-one dimensional osmium oxide Na2OsO4. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2009.12.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Niibe Y, Watanabe J, Tsunoda S, Arai M, Arai T, Kawaguchi M, Matsuo K, Jobo T, Ono S, Numata A, Unno N, Hayakawa K. Concomitant expression of HER2 and HIF-1alpha is a predictor of poor prognosis in uterine cervical carcinoma treated with concurrent chemoradiotherapy: prospective analysis (KGROG0501). EUR J GYNAECOL ONCOL 2010; 31:491-496. [PMID: 21061787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND In previously reported retrospective analyses of uterine cervical carcinoma cases, HER2 was correlated with poor radiation sensitivity and poor treatment outcomes and HIF-1alpha was found to be an indicator of poor prognosis. To date, no prospective studies have been performed to evaluate the radiation sensitivity and treatment outcomes of patients with uterine cervical carcinoma relative to HER2 and HIF-1alpha expressions. We conducted a prospective evaluation of HER2 and HIF-1alpha in cases of locally advanced uterine cervical carcinoma treated with concurrent chemoradiotherapy. METHODS Between June 2005 and April 2008, 25 patients with locally advanced uterine cervical carcinoma were registered in this study, KGROG0501. Their clinical stages were Ib2/IIb/IIIb/IVa in 1/2/22/1 cases, respectively. Nineteen cases had squamous cell carcinoma and six had adenocarcinoma. HER2 expression and HIF-1alpha expression were analyzed using an immunohistochemical kit on pretreatment biopsied specimens. HIF-1alpha expression was studied using another commercial immunohistochemical kit on pretreatment biopsied specimens. The survival rates were compared between patients with and without positive HER2 and HIF-1alpha expressions. RESULTS The 20-month survival of HER2(-) and HIF-1alpha(-) cases (n = 6) was 100% and that of HER2(+) and HIF-1alpha(+) cases (n = 4) was 37.5% (p = 0.0032). CONCLUSIONS In this first prospective analysis of patients with uterine cervical carcinoma treated with concurrent chemoradiotherapy, concomitant expression of HER2 and HIF-1alpha was suggested to be a strong indicator of poor prognosis. A novel therapy including molecular targeted therapy such as anti-HER2 and anti-HIF-1alpha may be worth considering in patients with concomitant expression of HER2 and HIF-1alpha.
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Arai M, Wu X. Inelastic deformation behavior of thermal barrier coatings exposed at a high-temperature environment. EPJ WEB OF CONFERENCES 2010. [DOI: 10.1051/epjconf/20100626010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Akiyama Y, Meng X, Fujita S, Chen YC, Lu N, Cheng H, Zhao F, Arai M. Carbon dioxide pressure induced heterogeneous and homogeneous Heck and Sonogashira coupling reactions using fluorinated palladium complex catalysts. J Supercrit Fluids 2009. [DOI: 10.1016/j.supflu.2009.08.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Haba H, Tsukada K, Asai M, Toyoshima A, Ishii Y, Toume H, Sato T, Nishinaka I, Ichikawa T, Ichikawa S, Nagame Y, Sato W, Matsuo K, Kitamoto Y, Tashiro Y, Shinohara A, Saito J, Ito M, Ikezawa T, Sakamaki M, Goto S, Kudo H, Kikunaga H, Arai M, Kamataki S, Yokoyama A, Akiyama K, Sueki K, Oura Y, Schädel M, Brüchle W, Kratz JV. Extraction behavior of rutherfordium into tributylphosphate from hydrochloric acid. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2007.95.1.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The extraction behavior of rutherfordium (Rf) into tributylphosphate (TBP) from hydrochloric acid (HCl) has been studied together with those of the lighter group-4 elements Zr and Hf. The extractability of261Rf,169Hf, and85Zr into TBP was investigated under identical conditions in 7.2–8.0 M HCl by on-line reversed-phase extraction chromatography. The percent extractions of Rf, Hf, and Zr into the TBP resin increase steeply with increasing HCl concentration, and the order of extraction is Zr > Hf ≈ Rf. By considering the order of chloride complexation among these elements, it is suggested that the stability of the TBP complex of Rf tetrachloride is lower than those of Zr and Hf.
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Nakamoto S, Sakai Y, Kasanuki J, Kondo F, Ooka Y, Kato K, Arai M, Suzuki T, Matsumura T, Bekku D, Ito K, Tanaka T, Yokosuka O. Indications for the use of endoscopic mucosal resection for early gastric cancer in Japan: a comparative study with endoscopic submucosal dissection. Endoscopy 2009; 41:746-50. [PMID: 19681023 DOI: 10.1055/s-0029-1215010] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND STUDY AIMS Endoscopic submucosal dissection (ESD) has been reported to produce excellent treatment results for early gastric cancer. In terms of lesions that previously met the criteria for endoscopic mucosal resection (EMR), there is now controversy about which of the two methods is superior, and whether the two methods are comparable. PATIENTS AND METHODS A total of 177 patients (202 lesions) with early gastric cancer who met the guidelines for EMR and who underwent either EMR or ESD were studied. The rates of en bloc resection, complete resection, local recurrence, and complications were compared between EMR and ESD. RESULTS The overall en bloc and complete resection rates were lower in patients undergoing EMR than in those undergoing ESD (en bloc: 53.8 % vs. 94.3 %, P < 0.001; complete: 37.5 % vs. 92.6 %, P < 0.001). The overall 5-year recurrence-free rate was lower in the EMR group than in the ESD group (82.5 % vs. 100 %; P < 0.001). However, with regard to the tumor size, the two groups did not differ in en bloc ( P = 1.0) or complete resection rate ( P = 0.8) for tumors < or = 5 mm and in 5-year recurrence-free rate ( P = 0.19) for tumors < or = 10 mm. The mean time required for resection was longer for ESD than for EMR ( P < 0.001). Perforation and bleeding requiring blood transfusion occurred in a small percentage in the ESD group, but in none in the EMR group. CONCLUSION In this study, EMR was comparable to ESD for the millimeter-sized lesions. We suggest that such small lesions might be well suited to treatment with EMR.
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Kanda T, Nakano M, Arai M, Yamamoto A, Suzuki T, Murata K. Myocardial atrial natriuretic factor gene expression after coronary ligation in rats. EXPERIMENTAL AND CLINICAL ENDOCRINOLOGY 2009; 101:173-7. [PMID: 8223987 DOI: 10.1055/s-0029-1211226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The atrial natriuretic factor (ANF) messenger RNA (mRNA) content was determined in a rat model of acute myocardial infarction. Non-infarcted tissue of left and right ventricles were examined soon after ligation of the left descending anterior coronary artery. In the left ventricles, ANF mRNA/alpha-actin mRNA ratio increased to reach a maximum on day 7 and was sustained while in the right ventricle, the maximum was reached on day 1. The plasma ANF was significantly (p < 0.01) elevated from days 1 to 28 after coronary ligation. The primary compensatory response of ANF within the first 7 days may be attributed not only its synthesis in the left ventricle but also to its generation in the right ventricle in acute heart failure.
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Collins-Racie LA, Yang Z, Arai M, Li N, Majumdar MK, Nagpal S, Mounts WM, Dorner AJ, Morris E, LaVallie ER. Global analysis of nuclear receptor expression and dysregulation in human osteoarthritic articular cartilage: reduced LXR signaling contributes to catabolic metabolism typical of osteoarthritis. Osteoarthritis Cartilage 2009; 17:832-42. [PMID: 19217805 DOI: 10.1016/j.joca.2008.12.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Revised: 11/12/2008] [Accepted: 12/20/2008] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Compare the expression and regulation of nuclear receptors (NRs) in osteoarthritic and normal human articular cartilage. METHOD The transcriptional levels of 48 NRs and additional related proteins were measured in mRNA from human articular cartilage from subjects with osteoarthritis (OA) and compared to samples from subjects without OA, using microarrays, individual quantitative reverse transcriptase polymerase chain reaction assays, and a custom human NR TaqMan Low Density Array (TLDA). The functional effect of liver X receptor (LXR) activity in cartilage was studied by measuring proteoglycan (PG) synthesis and degradation in articular cartilage explant cultures following treatment with the synthetic LXR agonist T0901317. RESULTS Thirty-one of 48 NRs analyzed by TLDA were found to be measurably expressed in human articular cartilage; 23 of these 31 NRs showed significantly altered expression in OA vs unaffected cartilage. Among these, LXRalpha and LXRbeta, and their heterodimeric partners retinoid X receptor (RXR)alpha and RXRbeta were all expressed at significantly lower levels in OA cartilage, as were LXR target genes ABCG1 and apolipoproteins D and E. Addition of LXR agonist to human OA articular chondrocytes and to cartilage explant cultures resulted in activation of LXR-mediated transcription and significant reduction of both basal and interleukin (IL)-1-mediated PG degradation. CONCLUSIONS Articular cartilage expresses a substantial number of NRs, and a large proportion of the expressed NRs are dysregulated in OA. In particular, LXR signaling in OA articular cartilage is impaired, and stimulation of LXR transcriptional activity can counteract the catabolic effects of IL-1. We conclude that LXR agonism may be a possible therapeutic option for OA.
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Arai M, Iwabuchi M. Pramipexole as a possible cause of the syndrome of inappropriate antidiuresis. CASE REPORTS 2009; 2009:bcr01.2009.1484. [DOI: 10.1136/bcr.01.2009.1484] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Suzuki F, Suga H, Tomimura K, Fuji S, Arai M, Koba A, Nakajima T. Development of simple sequence repeat markers for Japanese isolates of Magnaporthe grisea. Mol Ecol Resour 2009; 9:588-90. [PMID: 21564699 DOI: 10.1111/j.1755-0998.2008.02446.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
We developed nine simple sequence repeat (SSR) markers useful for differentiating Japanese isolates of Magnaporthe grisea through a bioinformatic approach. Repeat sequences in the genome of M. grisea were identified by a Tandem Repeat Finding program. Length polymorphisms at 28 loci were examined, nine of which were selected on the basis of detected polymorphisms. These nine SSR markers showed a Nei's gene diversity ranging from 0.23 to 0.91 among 48 field isolates of two natural populations. These SSR markers are well suited for M. grisea epidemiology and population genetics.
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Nakamura M, Arai M, Kajimoto R, Yokoo T, Nakajima K, Krist T. Conceptual Design Of Magic Chopper Used For 4SEASONS at J-PARC. JOURNAL OF NEUTRON RESEARCH 2008. [DOI: 10.1080/10238160902819510] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Akiyama Y, Fujita S, Senboku H, Rayner C, Brough S, Arai M. An in situ high pressure FTIR study on molecular interactions of ketones, esters, and amides with dense phase carbon dioxide. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.03.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kajimoto R, Nakajima K, Nakamura M, Osakabe T, Sato TJ, Arai M. Curved neutron guide of the cold neutron disk-chopper spectrometer at J-PARC. JOURNAL OF NEUTRON RESEARCH 2008. [DOI: 10.1080/10238160902819346] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ishigaki T, Hoshikawa A, Yonemura M, Iwase K, Adipranoto D, Wuernisha T, Morishima T, Oishi R, Kamiyama T, Aizawa K, Arai M, Hayashi M, Ebata K, Takano Y, Kasao T. The current status of iMATERIA – versatile neutron diffractometer at J-PARC. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308094075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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87
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Shibata K, Takahashi N, Tsukushi I, Nakajima K, Arai M. The study of thermal diffuse scattering measured by pulsed neutron diffraction. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308093951] [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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Fujita S, Tanaka T, Akiyama Y, Asai K, Hao J, Zhao F, Arai M. Impact of Carbon Dioxide Pressurization on Liquid Phase Organic Reactions: A Case Study on Heck and Diels–Alder Reactions. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800212] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Niibe Y, Watanabe J, Tsunoda S, Imai M, Jobo T, Arai M, Arai T, Kawaguchi M, Unno N, Hayakawa K. Clinical significance radadiation sennsitivity of nuclear survivin expression in uterine cervical carcinoma treated with concurrent chemoradiotherapy: prospective analysis (KGROG0501). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.16569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Komura H, Uchiba M, Mizuochi Y, Arai M, Harada N, Katsuya H, Okajima K. Antithrombin inhibits lipopolysaccharide-induced tumor necrosis factor-alpha production by monocytes in vitro through inhibition of Egr-1 expression. J Thromb Haemost 2008; 6:499-507. [PMID: 18088351 DOI: 10.1111/j.1538-7836.2007.02869.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Antithrombin (AT) improves the outcome of septic patients with intravascular coagulation. However, the mechanisms underlying the therapeutic benefits of AT are not fully understood. Tumor necrosis factor-alpha (TNF-alpha) plays a critical role in the development of organ failure and intravascular coagulation in sepsis. AIM This study aimed to elucidate a molecular mechanism by which AT inhibits TNF-alpha production. METHODS Human peripheral monocyte was stimulated by lipopolysaccharide (LPS) and TNF-alpha concentration in media was measured. Levels of phosphorylation of extracellular signal-regulated protein kinases (ERK) 1/2 and early growth response factor-1 (Egr-1) were estimated by western blotting or by electrophoretic mobility shift assay. RESULTS Antithrombin (3 U mL(-1)) inhibited TNF-alpha production by monocytes stimulated with LPS. Conversely, chemically modified AT that lacks affinity for heparin did not. AT inhibited the phosphorylation of ERK 1/2 and decreased the expression of Egr-1 in LPS-stimulated monocytes. However, it did not affect the activation of either nuclear factor-kappaB or activator protein-1. Pretreatment with KT5720, a protein kinase A inhibitor, reversed the inhibitory effect of AT on the LPS-induced phosphorylation of ERK1/2. Although 2 U mL(-1) AT slightly inhibited TNF-alpha production by LPS-stimulated monocytes, it significantly inhibited TNF-alpha production in the presence of a low concentration of beraprost, a stable derivative of prostacyclin. CONCLUSIONS These observations suggest that AT might inhibit LPS-induced production of TNF-alpha by inhibiting the increase in Egr-1 expression in monocytes via interaction with heparin-like substances expressed on the cell surface.
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Tanaka H, Arai M, Kadowaki T, Takekawa H, Kokubun N, Hirata K. Phantom arm and leg after pontine hemorrhage. Neurology 2008; 70:82-3. [PMID: 18166712 DOI: 10.1212/01.wnl.0000265394.80360.b5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Watanabe A, Arai M, Kurabayashi M. Mitochondrial transcription factor, Tfam, regulates the SERCA2 gene transcription. J Mol Cell Cardiol 2008. [DOI: 10.1016/j.yjmcc.2007.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nitta H, Kinoyama M, Watanabe A, Shirao K, Kihara H, Arai M. Effects of nutritional supplementation with antioxidant vitamins and minerals and fish oil on antioxidant status and psychosocial stress in smokers: an open trial. Clin Exp Med 2008; 7:179-83. [PMID: 18188532 DOI: 10.1007/s10238-007-0144-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2007] [Accepted: 09/18/2007] [Indexed: 11/27/2022]
Abstract
Nutritional supplement foods containing antioxidant vitamins and minerals and fish oil (mainly docosahexaenoic acid, DHA, C22:6n-3), referred to as capsules, were administered to seven smokers every day for 34 days. Concentrations of antioxidant vitamins and minerals in serum, activity of superoxide dismutase in plasma and the concentration of 8-isoprostane (8-epi-prostaglandin F(2) alpha) in the urine showed an increase or a tendency to increase after the end of administration. The frequency of subjects showing poor state of psychological health evidenced by a total score of 8 points or more on the General Health Questionnaire (30-item edition) scale was 42.9%, although there was a significant decrease to 14.3% upon completion of administration of the capsules. These biochemical and psychological changes were mostly returned to the basal level one month after the end of administration of the capsules. The results suggest that administration of antioxidant vitamins and minerals and fish oil to smokers resulted in an increase in antioxidant capacity. Effectiveness in alleviating psychosocial stress likely to be attributable to DHA was also observed.
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Yamaura K, Arai M, Sato A, Karki AB, Young DP, Movshovich R, Okamoto S, Mandrus D, Takayama-Muromachi E. NaV2O4: a quasi-1D metallic antiferromagnet with half-metallic chains. PHYSICAL REVIEW LETTERS 2007; 99:196601. [PMID: 18233097 DOI: 10.1103/physrevlett.99.196601] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2006] [Revised: 07/03/2007] [Indexed: 05/25/2023]
Abstract
NaV2O4 crystals were grown under high pressure using a NaCl flux, and the crystals were characterized with x-ray diffraction, electrical resistivity, heat capacity, and magnetization. The structure of NaV2O4 consists of double chains of edge-sharing VO6 octahedra. The resistivity is highly anisotropic, with the resistivity perpendicular to the chains more than 20 times greater than that parallel to the chains. Magnetically, the intrachain interactions are ferromagnetic and the interchain interactions are antiferromagnetic; 3D antiferromagnetic order is established at 140 K. First-principles electronic structure calculations indicate that the chains are half-metallic. Interestingly, the case of NaV2O4 seems to be a quasi-1D analogue of what was found for half-metallic materials.
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Murata R, Nakagawa K, Ohtori S, Ochiai N, Arai M, Saisu T, Sasho T, Takahashi K, Moriya H. The effects of radial shock waves on gene transfer in rabbit chondrocytes in vitro. Osteoarthritis Cartilage 2007; 15:1275-82. [PMID: 17537650 DOI: 10.1016/j.joca.2007.04.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2006] [Accepted: 04/03/2007] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The purpose of this study was to develop a new technique of gene transfer utilizing radial shock waves. The effects of radial shock waves on gene transfer in rabbit chondrocytes were examined by varying the parameters of exposure conditions in vitro. METHODS Chondrocytes were obtained from New Zealand white rabbits and cultured in a monolayer. A luciferase-encoding gene expression vector, or vector alone, was added to chondrocyte cell suspensions, and the cells were then exposed to radial shock waves. Parameters such as pressure amplitude, number of pulses, frequency, and DNA concentration were varied, and luciferase activity was measured 48h after transfection. Transfection efficiency of radial shock waves was compared with the FuGENE6 transfection method using a green fluorescence protein (GFP)-encoding gene vector by fluorescent-activated cell sorter (FACS) analysis. RESULTS Radial shock wave exposure significantly increased luciferase activity over 140-fold as compared to the control under the optimal exposure conditions. Both pressure amplitude and number of pulses were relevant to transfection efficiency and cell viability, but frequency was not. Transfection efficiency increased in a dose-dependent manner with DNA concentration. FACS analysis showed 4.74% of GFP-encoding gene using radial shock waves. FuGENE6 transfection was almost similar in transfection efficiency to radial shock wave. CONCLUSION In spite of certain degree of cell disruption, radial shock waves significantly augmented reporter gene transfection in rabbit chondrocytes in vitro. Radial shock waves may potentially contribute to the treatment of the cartilage morbidities by enhancing the potency of tissue healing and gene transfection of growth factors.
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Kanamasa S, Kawaguchi T, Takada G, Kajiwara S, Sumitani J, Arai M. Development of an efficient production method for ?-mannosidase by the creation of an overexpression system in Aspergillus aculeatus. Lett Appl Microbiol 2007; 45:142-7. [PMID: 17651209 DOI: 10.1111/j.1472-765x.2007.02160.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM To develop an overexpression system in Aspergillus aculeatus in order to establish an efficient overproduction method of beta-mannosidase (MANB). METHODS AND RESULTS An overexpression plasmid for the manB gene, encoding A. aculeatus MANB, was constructed and introduced into A. aculeatus cells. The gene was overexpressed under an improved promoter containing 12 copies of Region III cis-elements of Aspergillus oryzae in the transformant, and it secreted 2.56 mg MANB ml(-1) in liquid culture, which obtained a 9.4-fold higher productivity than that achieved in an overexpression system in A. oryzae. Most of the secreted protein in the cultured medium of the transformed A. aculeatus was the overproduced enzyme. CONCLUSIONS Aspergillus aculeatus with the introduced overexpression plasmid produced 2.56 mg MANB ml(-1) in cultured medium. The improved promoter with A. oryzae Region III functioned in A. aculeatus; thus the strain is an expectant host for recombinant protein productions. SIGNIFICANCE AND IMPACT OF THE STUDY The overexpression system with the improved promoter in A. aculeatus brought the highest productivity of MANB reported to date. The expression system would be a strong bioindustrial tool for protein production.
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Sakakibara M, Nagashima T, Nakamura R, Fujimoto H, Arai M, Kadowaki M, Miyazaki M. Pathologic complete remission of cytologically proven axillary node metastases may be a strong prognostic factor in HER2-positive breast cancer. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.21149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
21149 Background: Preoperative chemotherapy has become one of the standard modes of treatment in patients with breast cancer, and pathologic complete remission (pCR) thus obtained has become an important prognostic factor. However, the number of cells in the main lesion is enormous and changes over time in a heterogeneous manner. Thus, time and individual differences in sensitivity influence the acquisition of pCR, and questions about the coincidence with the effects of metastatic lesions also remain. On the other hand, although pCR of axillary lymph node metastasis lesions with relatively lower numbers of the cells is considered one of the best surrogate prognostic markers, evaluation criteria have not yet been established because definitive preoperative diagnosis is difficult. In our department, preoperative axillary cytodiagnosis has been conducted in all surgical breast cancer cases. In this study, we investigated pCR of the axillary lymph nodes (ALN- pCR) in cytologically proven axillary node metastasis cases. Subjects and Methods: ALN-pCR, DFS, and OS were investigated in 52 surgical breast cancer cases (observation period: 15–52 months; medial level: 28 months) positive for cytological axillary metastasis and received preoperative chemotherapy (AC-Paclitaxel) during the period from 2002 to 2005. Results: ALN-pCR was found in 21 of 52 cases (40.4%). Rates of disease-free survival (DFS) at 36 months in ALN-pCR and non-ALN-pCR cases were 85.0% and 42.3% (P=0.031) and those of overall survival (OS; 48 months) were 100% and 87.9% (P=0.353), respectively. DFS (36 months) was very favorable 100% in ALN-pCR cases that obtained the effect of 1b or higher on evaluation of the main lesion effect and ALN-pCR cases with Her2-positive results on sub-type analysis. Conclusions: ALN-pCR of cytologically proven axillary node metastasis was indicated to be a prognostic factor in cases of breast cancer. Especially, its importance was demonstrated in HER2-positive breast cancer. From these findings, HER2-positive and cytologically axillary lymph node-positive cases were considered the best indications for preoperative chemotherapy. No significant financial relationships to disclose.
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Nakamura R, Sakakibara M, Nagashima T, Fujimoto H, Arai M, Hashimoto H, Kaneoya K, Ueda T, Miyazaki M. Use of oblique supine magnetic resonance imaging in breast-conserving surgery following neoadjuvant chemotherapy. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.11064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
11064 Background: The success of breast-conserving surgery (BCS) after neoadjuvant chemotherapy (NAC) is dependent on accurate assessment of the extent of surgical excision of the original tumor bed (OTB). However the difficulty in locating microscopic residual disease often leads to a high re-excision rate (RER) and large excision specimen area (ESA). Methods: Magnetic resonance imaging (MRI) scans in the oblique supine position are performed with the patient in the same posture as that adopted during surgery. Maximum intensity projection (MIP) images of MR coronary section images of OTB are generated and used for surgery. OTB images are copied onto transparent sheets overlaid on the MIP images. These images are projected onto the breast before surgery, and used to determine the lines for surgical excision. In the conventional method (CM), OTB is determined by ultrasonography (US) and CT images. The oblique supine MRI method (SMM) has been used at our hospital since 2005. In this study, 14 patients treated prospectively with SMM (12/05- 12/06) were compared with a series of 19 consecutive patients treated with CM (04/03–11/05). ESA and RER were analyzed. Re-excision was performed in cases with a calcified lesion or tumor within 1 cm of the excised margin by X-ray or US during surgery, or invasive cancer was detected within 1 mm by pathological examination. ESA was analyzed using NIH Image. All patients received anthracycline/taxane-based chemotherapy. Results: There were no significant differences in characteristics of patients in the initial stages (T1, 2) or pathological chemotherapy responses between SMM and CM groups. There were four T3.4 cases in the SMM group, but none in the CM group. Clinical responses in CM and SMM were as follows (cases): CR 6, 7; PR 12, 7; SD 1, 0, respectively. RER was significantly greater in CM (36.8%, n=7) than in SMM (7.1%, n=1) (P<0.05). Average ESA in SMM were 19.0 cm2 (n=2) in T1, 33.6 cm2 (7) in T2, and 59.3 cm2 (5) in T3.4, while corresponding values in CM were 49.4 cm2 (4) and 65.5 cm2 (15), respectively; ESA was significantly improved in SMM. Conclusions: SMM, which has the benefits of decreased ESA and RER with superior cosmetic results, is a reliable technique for BCS following NAC. No significant financial relationships to disclose.
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Hachisuka K, Arai K, Arai M. Carbon fibre reinforced plastic knee-ankle-foot orthosis with a partially flexible thigh cuff: a modification for comfort while sitting on a toilet seat. Prosthet Orthot Int 2007; 31:133-7. [PMID: 17520490 DOI: 10.1080/03093640600863844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
At the request of a polio survivor, a partially flexible thigh cuff made of leather and canvas for a carbon KAFO was devised to allow the wearer to feel more comfortable while sitting on a toilet seat. The original, acrylic resin, thigh cuff was partially excised to make an opening (15x10 cm), which was stuffed with rubber sponge, and was sealed with leather and canvas. The opening's surround was vertically and horizontally reinforced with carbon fibres. This modification provided relief to the polio survivor from the discomfort previously experienced while sitting on a toilet seat, and satisfied her needs in daily life.
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Nagashima T, Sakakibara M, Nakamura R, Arai M, Kadowaki M, Kazama T, Nakatani Y, Koda K, Miyazaki M. Dynamic enhanced MRI predicts chemosensitivity in breast cancer patients. Clin Imaging 2007. [DOI: 10.1016/j.clinimag.2007.02.012] [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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