1
|
Mitsuhashi R, Song BS, Inoue K, Asano T, Noda S. Design and fabrication of a coupled high-Q photonic nanocavity system with large coupling coefficients. Opt Express 2024; 32:10630-10647. [PMID: 38571269 DOI: 10.1364/oe.513508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/27/2024] [Indexed: 04/05/2024]
Abstract
In a previous work, we demonstrated a coupled cavity system where photons in one storage cavity can be transferred to another storage cavity at an arbitrary time by applying a voltage pulse to a third cavity placed in a p-i-n junction. In this work, we demonstrate methods to improve the transfer efficiency and photon lifetimes of such a coupled system. Firstly, we designed a photonic-crystal structure that achieves a large coupling coefficient without reducing the radiation quality factor compared to the previously proposed structure: The photonic-crystal design was changed to a more symmetric configuration to suppress radiation losses and then optimized using an automatic structure tuning method based on the Covariance Matrix Adaptive Evolutional Strategy (CMAES). Here we added two improvements to achieve an evolution toward the desired direction in the two-dimensional target parameter space (spanned by the coupling coefficient and the inverse radiation loss). Secondly, to improve the experimental cavity quality factors, we developed a fabrication process that reduces the surface contamination associated with the fabrication of the p-i-n junction: We covered the photonic structure with a SiO2 mask to avoid the contamination and the electrode material was changed from Al to Au/Cr to enable cleaning by a weak acid. Owing to these improvements of the cavity design and the fabrication process, the obtained system provides coupling strengths that are about three times stronger and photon lifetimes that are about two times longer, compared to the previously reported system.
Collapse
|
2
|
Ichikawa K, Kawahara R, Asano T, Morishita S. A landscape of complex tandem repeats within individual human genomes. Nat Commun 2023; 14:5530. [PMID: 37709751 PMCID: PMC10502081 DOI: 10.1038/s41467-023-41262-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 08/28/2023] [Indexed: 09/16/2023] Open
Abstract
Markedly expanded tandem repeats (TRs) have been correlated with ~60 diseases. TR diversity has been considered a clue toward understanding missing heritability. However, haplotype-resolved long TRs remain mostly hidden or blacked out because their complex structures (TRs composed of various units and minisatellites containing >10-bp units) make them difficult to determine accurately with existing methods. Here, using a high-precision algorithm to determine complex TR structures from long, accurate reads of PacBio HiFi, an investigation of 270 Japanese control samples yields several genome-wide findings. Approximately 322,000 TRs are difficult to impute from the surrounding single-nucleotide variants. Greater genetic divergence of TR loci is significantly correlated with more events of younger replication slippage. Complex TRs are more abundant than single-unit TRs, and a tendency for complex TRs to consist of <10-bp units and single-unit TRs to be minisatellites is statistically significant at loci with ≥500-bp TRs. Of note, 8909 loci with extended TRs (>100b longer than the mode) contain several known disease-associated TRs and are considered candidates for association with disorders. Overall, complex TRs and minisatellites are found to be abundant and diverse, even in genetically small Japanese populations, yielding insights into the landscape of long TRs.
Collapse
Affiliation(s)
- Kazuki Ichikawa
- Department of Computational Biology and Medical Sciences, The University of Tokyo, 277-8561, Chiba, Japan
| | - Riki Kawahara
- Department of Computational Biology and Medical Sciences, The University of Tokyo, 277-8561, Chiba, Japan
| | - Takeshi Asano
- Department of Computational Biology and Medical Sciences, The University of Tokyo, 277-8561, Chiba, Japan
| | - Shinichi Morishita
- Department of Computational Biology and Medical Sciences, The University of Tokyo, 277-8561, Chiba, Japan.
| |
Collapse
|
3
|
Fukunaga R, Asano T, Matsui R, Abe M, Ishiwada N, Shima Y. A case of bacteremia and meningitis in a neonate infected with Group B Streptococcus via breastfeeding who survived without neurological sequelae: A case report. J NIPPON MED SCH 2023:JNMS.2024_91-501. [PMID: 37271545 DOI: 10.1272/jnms.jnms.2024_91-501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Invasive neonatal infection with Group B Streptococcus (GBS) is a disease of concern that can lead to neurological sequelae. Guidelines for preventing mother-to-child transmission have been introduced to reduce the incidence of early-onset infection, but guidelines for controlling the late-onset form are lacking. Recently, the trans-breastfeeding route of transmission has been highlighted as an example of late-onset infection, but no consensus on how to manage such infections has been reached. In this report, we describe a case of late-onset bacteremia/meningitis in a neonate suspected to have been infected with GBS via breastfeeding. A vaginal culture test of the mother at 35 weeks' gestation was negative for GBS. Since she had symptoms of mastitis, breast milk and nipple cultures were also tested and found to be positive for the strain of GBS identified in the neonate on genetic analysis. Diagnosis of trans-mammary GBS infection is challenging because breastfeeding-related events are difficult to identify. In our case, the diagnosis was based on the mother's history of mastitis, and the patient was treated without escalation to sequelae. When a neonate develops a fever, physicians should consider GBS infection and examine the mother's medical history to facilitate accurate diagnosis, especially if the history includes mastitis. A breast milk culture should be performed if the mother has mastitis, especially in cases of infection in preterm infants and in recurrent cases.
Collapse
Affiliation(s)
- Ryohei Fukunaga
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Ryosuke Matsui
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Masanori Abe
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Naruhiko Ishiwada
- Department of Infectious Diseases, Medical Mycology Research Center, Chiba University
| | - Yoshio Shima
- Department of Neonates, Nippon Medical School Musashi Kosugi Hospital
| |
Collapse
|
4
|
Bartoli-Leonard F, Rogers M, Zheng K, Small A, Asano T, Kuraoka S, Blaser M, Natarajan P, Yeang C, Tsimikas S, O'donnell C, Aikawa M, Singh S, Stroes E, Aikawa E. Inhibition of novel lipoprotein(a) receptor major facilitator superfamily domain containing 5 (MFSD5) reduces development of aortic valve calcification. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Other. Main funding source(s): Private grant from Kowa Pharmaceuticals to Brigham and Woman's Hospital
Calcific aortic valve stenosis (CAVS) is the most prevent valvular heart disease in the western world increasing exponentially with age, with an 112% increase in CAVS deaths in the last three decades; however no therapeutic treatment is currently available. Recently, lipoprotein(a) [Lp(a)] has been demonstrated to be an independent and causal risk factor for CAVS, yet the understanding of its cellular uptake and catabolism is limited thus underscoring the need for further investigation.
This study aimed to determine a target receptor, unique for Lp(a) on the surface of valvular interstitial cells (VICs) and ascertain the role of the receptor on the development of VIC calcification.
Unbiased ligand-receptor capture mass spectrometry (TriCEPS) was used to identify target receptor, with western blotting, ELISA, qPCR, alizarin red calcium staining and immunofluorescence used to validate the targets in vitro via siRNA inhibition and overexpression. Transmission electron microscopy (TEM) was used to determine uptake of Lp(a) within excised human valves. Identification of small molecule inhibitors was assessed computationally via the L1000 dataset, with the top hit candidate validated in vitro. Genotype-phenotype studies were examined using the United Kingdom Biobank (UKBB) and the Millions Veterans Program. Linear regression was used to evaluate association between aortic stenosis and plasma Lp(a) levels, and a phenotype-wide association analysis was then performed against this generated ‘genotype’.
Ligand-receptor capture mass spectrometry was used to detect novel membrane proteins with specific binding to Lp(a); MFSD5, MRC2, LDLR were identified as possible candidates. MFSD5 RNAscope demonstrated its presence in human aortic valves. Lp(a) uptake in VICs was confirmed via western blot and TEM. MFSD5 siRNA significantly reduced dil-labelled Lp(a) uptake in human VICs (p=0.003) and HEPG2 cells (p=0.0003), conversely MFSD5 overexpression increased uptake (p=0.0345, p=0.0318), whilst specificity of MFSD5 to Lp(a) alone was shown via no change in LDL uptake following MFSD5 inhibition (p=0.616, p=0.991). MFSD5 inhibition reduced RUNX2 (p=0.0124) and Osteocalcin (p<0.001) RNA expression and reduced alizarin red staining following culture in Lp(a) osteogenic media for 21 days (p<0.0033). Druggability of MFSD5 was confirmed by the L1000 database, which identified aminopurvalanol as a binding partner for MFSD5 and significantly reduced Lp(a) uptake within VICs (p=0.0091). MFSD5-loss of function within the UKBB showed no significant cardiovascular association, however 50kb +/- of the MFSD5 gene showed nominal association with hyperlipidaemia and atrial fibrillation.
The current study demonstrates the novel Lp(a) receptor MFSD5 may be responsible for uptake of Lp(a) within VICs, resulting in the development of aortic valve calcification, highlighting the need for further exploration into the role of MFSD5 in aortic valve disease.
Collapse
Affiliation(s)
- F Bartoli-Leonard
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - M Rogers
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - K Zheng
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - A Small
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - T Asano
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - S Kuraoka
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - M Blaser
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - P Natarajan
- Boston VA Healthcare System , Boston , United States of America
| | - C Yeang
- University of California, San Diego , San Diego , United States of America
| | - S Tsimikas
- University of California, San Diego , San Diego , United States of America
| | - C O'donnell
- Boston VA Healthcare System , Boston , United States of America
| | - M Aikawa
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - S Singh
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| | - E Stroes
- Amsterdam UMC - Location Academic Medical Center , Amsterdam , Netherlands (The)
| | - E Aikawa
- Brigham And Women'S Hospital, Harvard Medical School , Boston , United States of America
| |
Collapse
|
5
|
Yoshida K, Fujita A, Narazaki H, Asano T, Itoh Y. Drug resistance to nelarabine in leukemia cell lines might be caused by reduced expression of deoxycytidine kinase through epigenetic mechanisms. Cancer Chemother Pharmacol 2021; 89:83-91. [PMID: 34825941 DOI: 10.1007/s00280-021-04373-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 11/11/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE Drug resistance is a serious problem in leukemia therapy. A novel purine nucleoside analogue, nelarabine, is available for the treatment of children with T cell acute lymphoblastic leukemia. We investigated the mechanisms of drug resistance to nelarabine. METHODS Nelarabine-resistant cells were selected by stepwise and continuous exposure to nelarabine using the limiting dilution method in human B and T cell lymphoblastic leukemia cell lines. Expression analysis was performed using real-time polymerase chain reaction, and epigenetic analysis was performed using methylation-specific polymerase chain reaction and chromatin immunoprecipitation. RESULTS The RNA expression level for deoxycytidine kinase (dCK) was decreased in nelarabine-resistant leukemia cells. There were no differences between the parental and nelarabine-resistant leukemia cells in the methylation status of the promoter region of the dCK gene. In the chromatin immune precipitation assay, decreased acetylation of histones H3 and H4 bound to the dCK promoter was seen in the nelarabine-resistant cells when compared to the parental cells. Furthermore, treatment with a novel histone deacetylase inhibitor, vorinostat, promoted the cytotoxic effect of nelarabine along with increased expression of the dCK gene, and it increased acetylation of both histones H3 and H4 bound to the dCK promoter in nelarabine-resistant leukemia cells. The combination index showed that the effect of nelarabine and vorinostat was synergistic. CONCLUSION This study reports that nelarabine with vorinostat can promote cytotoxicity in nelarabine-resistant leukemia cells through epigenetic mechanisms.
Collapse
Affiliation(s)
- Keishi Yoshida
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, 1715 Kamagari, Inzai, Chiba, 270-1694, Japan
| | - Atsushi Fujita
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, 1715 Kamagari, Inzai, Chiba, 270-1694, Japan
| | - Hidehiko Narazaki
- Department of Pediatrics, Nippon Medical School, Inzai, Chiba, Japan
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, 1715 Kamagari, Inzai, Chiba, 270-1694, Japan.
| | - Yasuhiko Itoh
- Department of Pediatrics, Nippon Medical School, Inzai, Chiba, Japan
| |
Collapse
|
6
|
Abstract
After the accident at Fukushima Daiichi nuclear power plant on 11 March 2011, radioactive materials were released into the atmosphere resulting in environmental contamination. Following the implementation of environmental decontamination efforts, the Radiation Dose Registration Centre of the Radiation Effects Association established the radiation dose registration system for decontamination and related workers to consolidate and prevent the loss of radiation records. This article presents statistics on the radiation doses of decontamination and related workers using official records. Since approximately 10 years have passed since the accident in Fukushima, the types of work conducted in the affected restricted areas have changed over time. Therefore, changes in radiation dose for each type of work and comparisons with nuclear workers are presented.
Collapse
Affiliation(s)
- T Ogawa
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - T Ueno
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - T Asano
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - A Suzuki
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| | - A Ito
- Radiation Effects Association, 1-9-16 Kaji-cho, Chiyoda-ku, Tokyo 101-0044, Japan
| |
Collapse
|
7
|
Kuramochi E, Mae K, Ohtomo Y, Kamada R, Sugano-Tajima H, Asano T. Growth Hormone Treatment at Nippon Medical School Chiba Hokusoh Hospital. J NIPPON MED SCH 2021; 88:39-44. [PMID: 32475901 DOI: 10.1272/jnms.jnms.2021_88-103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Since 2002, the Department of Pediatrics of Nippon Medical School Chiba Hokusoh Hospital has offered educational activities for children with short stature. We analyzed outcomes of growth hormone (GH) treatment for children with short stature treated at our hospital, particularly outcomes after the growth spurt. METHODS We analyzed data from children aged 0 to 17 years who were treated with recombinant GH during the period from 2000 through 2016 and were followed for at least 2 years after the start of treatment. RESULTS Among children with short stature, 85 had GH deficiency, 5 had Turner syndrome, 9 were small for gestational age, and 1 had Noonan syndrome. The outcomes of GH treatment was similar to those previously reported in Japan. Children with GH deficiency who started GH treatment before the growth spurt exhibited marked height catch-up until the second year, but the effect decreased after 3 years. The effect of treatment for GH deficiency that was started after the growth spurt continued for 4 to 5 years after the start of treatment. CONCLUSIONS Improvement in height standard deviation score was similar when treatment was started before and after the growth spurt.
Collapse
Affiliation(s)
- Eri Kuramochi
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Kazuya Mae
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Yuuka Ohtomo
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Reina Kamada
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | | | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| |
Collapse
|
8
|
Yoshino M, Ueda T, Takada H, Kanno A, Maeda M, Matsumoto H, Matsui Y, Asano T, Itoh Y. Post-traumatic stress disorder of children with traffic accidents and their parents in Japan. J NIPPON MED SCH 2021; 89:47-55. [PMID: 33692302 DOI: 10.1272/jnms.jnms.2022_89-105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Children who survive traffic accidents, and their parents, may develop post-traumatic stress disorder (PTSD) or related symptoms (depression or anxiety), which can hinder the children's development and the parents' ability to provide effective care. In Japan, the PTSD incidence rate following traffic accidents and its related factors remain unclarified. METHOD Participants were 79 children and 104 parents. The children were aged 3-18 years when injured. From August-December 2015, participants completed a self-reported questionnaire survey that comprised the 15-item Post-traumatic Stress Symptoms for Children and the Japanese version of the Impact of Event Scale-Revised. The children's Injury Severity Score (ISS) was also obtained from their medical records. Correlations, analyses of variance, and multiple regression analyses were conducted. RESULTS Among the children and the parents, 10.2% and 22.1% were deemed to be at high risk of PTSD, respectively. Their stress scores were significantly positively correlated with each other and negatively correlated with children's age at the time of the accident. Parents who witnessed their children's accidents and those whose children were hospitalized were more stressed. Neither the children's nor the parents' risk for PTSD was associated with the ISS and the amount of time since the accident. CONCLUSIONS A system that simultaneously works with children and parents, to support both parties' psychological recovery is required. To ensure psychological care post-injury, it is necessary to evaluate PTSD risk, regardless of injury severity. Implementing preventive and early interventions can prove more valuable than awaiting natural recovery.
Collapse
Affiliation(s)
- Mio Yoshino
- Department of Pediatrics, Nippon Medical School
| | | | - Haruki Takada
- Department of Clinical Psychology, Faculty of Psychology, Iryo Sosei University
| | - Aya Kanno
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Miho Maeda
- Department of Pediatrics, Nippon Medical School.,Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, Nippon Dental University
| | - Hisashi Matsumoto
- Shock and Trauma Center, Nippon Medical School Chiba Hokusoh Hospital
| | - Yutaka Matsui
- Graduate School of Comprehensive Human Science, Tsukuba University
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | | |
Collapse
|
9
|
Ueharu K, Asano T, Fukunaga R, Matsui R, Yoshida K, Miyatake-Sudoh C, Abe M, Fujita A, Ito Y. A Case of Kawasaki Disease with Intussusception. J NIPPON MED SCH 2020; 87:346-349. [DOI: 10.1272/jnms.jnms.2020_87-606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Koji Ueharu
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Ryohei Fukunaga
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Ryosuke Matsui
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Keishi Yoshida
- Department of Pediatrics, Nippon Medical School Hospital
| | | | - Masanori Abe
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Atsushi Fujita
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Yasuhiko Ito
- Department of Pediatrics, Nippon Medical School Hospital
| |
Collapse
|
10
|
Onuki T, Shoji M, Kikuchi M, Asano T, Suzuki H, Tannno K, Shinke T. Clinical risk predictors for bradycardia, supraventricular tachycardia and epilepsy necessitating therapy in patients with unexplained syncope monitored by insertable cardiac monitor. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Insertable cardiac monitors (ICMs) allow for lengthy monitoring of cardiac rhythm and improve diagnostic yield in patients with unexplained syncope. In most cardiac syncope cases, sick sinus syndrome, atrioventricular block, and paroxysmal supraventricular tachycardia (SVT) are detected using ICMs. On the other hand, epileptic seizures are sometimes diagnosed as unexplained syncope because in these situations, the loss of consciousness is a similar manifestation. Thus, the population of patients with unexplained syncope monitored by ICMs includes epileptic patients. Clinical risk factors for bradycardia, SVT and epilepsy that necessitate therapy in patients with unexplained syncope are not well known. If these risks can be clarified, clinicians could provide more specific targeted monitoring.
Purpose
We aimed to identify these predictors.
Methods
We retrospectively reviewed medical records of consecutive patients who received ICMs to monitor unexplained syncope in three medical facilities. We performed Cox's stepwise logistic regression analysis to identify significant independent risk factors for bradycardia, SVT, and epilepsy.
Results
One hundred thirty-two patients received ICMs to monitor unexplained syncope. During the 17-month follow-up period, 19 patients (10 patients had sick sinus syndrome and 9 had atrioventricular block) needed pacemaker for bradycardia; 8 patients (3 had atrial flutter, 4 had atrial tachycardia, and 1 had paroxysmal atrial fibrillation) needed catheter ablation for SVT; and 9 patients needed antiepileptic agents from the neurologist.Stepwise logistic regression analysis indicated that syncope during effort (odds ratio [OR] = 3.41; 95% confidence interval [CI], 1.21 to 9.6; p=0.02) was an independent risk factor for bradycardia. Palpitation before syncope (OR = 9.46; 95% CI, 1.78 to 50.10; p=0.008) and history of atrial fibrillation (OR = 10.1; 95% CI, 1.96 to 52.45; p=0.006) were identified as significant independent prognostic factors for SVT. Syncope while supine (OR = 11.7; 95% CI, 1.72 to 79.7; p=0.01) or driving (OR = 15.6; 95% CI, 2.10 to 115.3; p=0.007) was an independent factor for epileptic seizure.
Conclusions
ICMs are useful devices for diagnosing unexplained syncope. Palpitation, atrial fibrillation and syncope during effort were independent risk factors for bradycardia and for SVT. Syncope while supine or driving was an independent risk factor for epilepsy. We should carefully follow up of patients with these risk factors.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- T Onuki
- Showa University Hospital, Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - M Shoji
- Showa University Hospital, Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| | - M Kikuchi
- Cardiovascular Center, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - T Asano
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Kanagawa, Japan
| | - H Suzuki
- Division of Cardiology, Department of Medicine, Showa University Fujigaoka Hospital, Kanagawa, Japan
| | - K Tannno
- Cardiovascular Center, Showa University Koto Toyosu Hospital, Tokyo, Japan
| | - T Shinke
- Showa University Hospital, Division of Cardiology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
| |
Collapse
|
11
|
Asano T, Mitsuhashi Y, Yamashita J, Ito R, Saji M, Wakabayashi K, Yahagi K, Shinke T, Mase T, Miyachi H, Higuchi S, Miyauchi K, Yamamoto T, Nagao K, Takayama M. Relationship between age and the impact of revascularization on mortality in patients with non-ST-elevation myocardial infarction. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
It is known that the early coronary revascularization in patients with non-ST-elevation myocardial infarction (NSTEMI) was associated with favorable clinical outcomes. However, it is still unclear whether this efficacy is equivalent over all the ages of the patients.
Methods
Patients with NSTEMI were screened from the database of the Tokyo CCU network registry. Of those, the patients treated without revascularization (medical treatment) were matched with the patients receiving revascularization by propensity score matching. The probabilities of in-hospital death were calculated in the logistic regression model. In two subgroups stratified according to median of the age (elderly and non-elderly subgroups), the odds ratios of revascularization for in-hospital death were calculated.
Results
In the patients registered between 2013 and 2017, 4,851 patients with NSTEMI were identified. After the screening, 370 patients with medical treatment were matched with 370 patients treated with revascularization. The incidence of in-hospital death was significantly higher in the patients with medical treatment (20.3% vs 13.0%, P=0.01). The two probability curves of in-hospital death in patients with and without revascularization converged as age increased. In the elderly subgroup, the revascularization was not significantly associated with favorable outcome of mortality, whereas it had a significant impact on mortality in the non-elderly subgroup (odds ratio: 0.47 [95% CI 0.23–0.95]).
Conclusion
The impact of revascularization on short-term mortality in patients with NSTEMI tended to be reduced as age increased.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- T Asano
- Tokyo CCU Network, Tokyo, Japan
| | | | | | - R Ito
- Tokyo CCU Network, Tokyo, Japan
| | - M Saji
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | - T Mase
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | | | - K Nagao
- Tokyo CCU Network, Tokyo, Japan
| | | |
Collapse
|
12
|
Asano T, Mitsuhashi Y, Sachi M, Wakabayashi K, Yahagi K, Shinke T, Mase T, Miyachi H, Tujiguchi S, Yamashita J, Yamazaki M, Miyauchi K, Yamamoto T, Nagao K, Takayama M. The impact of low diastolic blood pressure on 30-day mortality of patients with acute myocardial infarction. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
It is known that low diastolic blood pressure (DBP) is associated with long-term cardiovascular events after acute myocardial infarction (AMI). However, the impact of low diastolic blood pressure on short-term outcome has not yet been well investigated.
Methods and results
We included 15,208 patients who were hospitalized for AMI and registered in the Tokyo CCU network registry between 2013 and 2016. Thirty-day in-hospital mortality rate was 4.8% (728/15,208). To assess the relationship between DBP at the time of admission and 30-day mortality non-linearly, spline regression model was applied with the stratification of the cohort according to tercile of systolic blood pressure (SBP, low:≤122 mmHg, intermediate:123–148 mmHg, high:≥149 mmHg) and J-curve phenomenon was observed in the low and high SBP groups. In multivariate logistic regression analysis, adjusted odds ratio of the lowest quintile of DBP (≤64 mmHg) was 1.65 (95% CI:1.02–2.66) in low SBP group and 4.55 (95% CI:1.72–12.00) in high SBP group.
Conclusion
Low DBP was associated with increased 30-day in-hospital mortality rate after AMI even in patients with high SBP.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- T Asano
- Tokyo CCU Network, Tokyo, Japan
| | | | - M Sachi
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | - T Mase
- Tokyo CCU Network, Tokyo, Japan
| | | | | | | | | | | | | | - K Nagao
- Tokyo CCU Network, Tokyo, Japan
| | | |
Collapse
|
13
|
Asano T, Ono M, Saito A, Kanie T, Takaoka T, Komiyama N. Twenty-year trends in clinical outcome of randomized controlled trial for coronary intervention: systematic review and meta-regression analysis of 46 randomized controlled trials. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Aim
The technology of percutaneous coronary intervention (PCI) has been developed after the advent of coronary stent. However, the impact of the technological development on clinical outcomes is still unclear, whereas a remarkable improvement of clinical outcomes after PCI has not been observed in the trials comparing to medical therapy or coronary bypass graft. The current analysis aims to investigate trends in clinical outcomes after PCI after the emargence of coronary stent, using the randomized controlled trials (RCTs) comparing coronary stents.
Methods and results
We performed a systematic review of RCTs investigating coronary stents in non-specific population (excluding the trials particularly enrolling diabetic or myocardial infarction etc.) conducted between 1996 and 2015 (publication between 1997 and 2019) with independent clinical event adjudication. The random-effect meta-regression analysis including 90 arms with 94,831 patients in 46 RCTs was performed investigating the 20-year trends in clinical outcomes such as death, cardiac death, myocardial infarction, target lesion revascularization (TLR) and stent thrombosis at one and five years after the index procedure. The sensitivity analysis was performed by limiting to 20 all comer trials. In the meta-regression analysis, we did not observe significant change in the incidences of cardiac death and myocardial infarction after PCI over 20 years (P values for cardiac death: 0.666 at one year, 0.256 at five years and P values for myocardial infarction: 0.121 at one year, 0.376 at five years; R2 for cardiac death: <0.01 at one year and five years and R2 for myocardial infarction: <0.01 at one year and five years), whereas the incidences of clinically indicated TLR (P value <0.001, R2 = 0.40 at one year, P value = 0.002, R2 = 0.22 at five years) and stent thrombosis were decreased steeply in the first decade and slightly in the second decade (P value = 0.040, R2 = 0.09 at one year; P value = 0.017, R2 = 0.17 at five year). The sencitivity analysis limiting all-comer population revealed the consistent results.
Conclusion
The development of PCI had an impact on the 20-year trends in TLR and ST, despite there were no trends in the cardiac death and myocardial infarction.
Trends in the incidence of the outcomes
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- T Asano
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - M Ono
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - A Saito
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - T Kanie
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - T Takaoka
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| | - N Komiyama
- St. Luke's International Hospital, Cardiology, Tokyo, Japan
| |
Collapse
|
14
|
Maeda M, Morimoto A, Shioda Y, Asano T, Koga Y, Nakazawa Y, Kanegane H, Kudo K, Ohga S, Ishii E. Long-term outcomes of children with extracutaneous juvenile xanthogranulomas in Japan. Pediatr Blood Cancer 2020; 67:e28381. [PMID: 32383820 DOI: 10.1002/pbc.28381] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/27/2020] [Accepted: 04/16/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND Juvenile xanthogranuloma (JXG) is the most common non-Langerhans cell histiocytosis in children. The mortality and morbidity of JXG with extracutaneous lesions remain unclear. METHODS Data of patients aged < 18 years who were diagnosed with JXG between 2001 and 2010 were retrospectively collected through a nationwide survey. RESULTS Twenty patients (11 male and nine female) had extracutaneous lesions. The median observation time was 10 years (range, 0-17). Six patients presented with symptoms at birth. The median age at diagnosis was 8.5 months (range, 0 month-13 years). Fifteen patients underwent treatment for JXG, including chemotherapy (n = 11), and five did not receive treatment. All patients except one survived; 17 were disease-free and two survived with disease. One newborn-onset patient with liver, spleen, and bone marrow involvement died of the disease. Permanent sequelae included central diabetes insipidus, growth hormone deficiency, and panhypopituitarism detected at diagnosis in three, one, and two patients, respectively. Four patients had visual impairment (optic nerve compression and intraocular invasion in two each), three had epilepsy, one had mental retardation, and one had a skin scar. Eight patients who had intracranial lesions were older at diagnosis, and had a higher frequency of disease-related comorbidities and permanent sequelae than those without intracranial involvement. CONCLUSIONS Patients with extracutaneous JXG had good outcomes, although those with intracranial lesions had serious permanent sequelae. Effective and safe treatment regimens for patients with intracranial JXG need to be developed.
Collapse
Affiliation(s)
- Miho Maeda
- Department of Pediatrics, Nippon Medical School, Tokyo, Japan
| | - Akira Morimoto
- Department of Pediatrics, Jichi Medical University School of Medicine, Shimotsuke, Japan
| | - Yoko Shioda
- Children's Cancer Center, National Center for Child Health and Development, Tokyo, Japan
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokuso Hospital, Chiba, Japan
| | - Yuhki Koga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yozo Nakazawa
- Department of Pediatrics, Shinshu University, Matsumoto, Japan
| | - Hirokazu Kanegane
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kazuko Kudo
- Department of Pediatrics, Fujita Health University School of Medicine, Toyoake, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eiichi Ishii
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Japan
| | | |
Collapse
|
15
|
Okubo K, Asano T, Sato A. Simvastatin augments anticancer activity of romidepsin in bladder cancer cells by causing AMP-activated protein kinase activation and histone acetylation. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32620-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
16
|
Abstract
Children with leukemia treated with methotrexate (MTX) may develop MTX-induced leukoencephalopathy, which can present as seizures or focal neurological deficits. However, the precise pathophysiology has not been fully elucidated. Differences in cytokine/chemokine profiles in cerebrospinal fluid (CSF) between children with MTX-induced leukoencephalopathy and those with posterior reversible encephalopathy syndrome (PRES), an acute neurological condition associated with hypertension, were investigated. Interleukin (IL)-1β, 2, 4, 5, 6, 7, 8, 10, 12, 13, and 17, tumor necrosis factor-alpha, interferon-gamma, granulocyte monocyte colony-stimulating factor, granulocyte colony-stimulating factor, macrophage inflammatory protein-1β, and monocyte chemoattractant protein-1 concentrations were measured in CSF supernatants from 3 children with acute leukemia with MTX-induced leukoencephalopathy, 3 children with acute leukemia with PRES, 6 children with acute leukemia without neurological complications, and 8 children with acute encephalopathy. CSF IL-6 concentrations were higher in children with MTX-induced leukoencephalopathy than in children with acute leukemia with PRES, with acute leukemia without neurological complications, and with acute encephalopathy. We concluded that IL-6 may be involved in the pathogenesis of MTX-induced leukoencephalopathy.
Collapse
Affiliation(s)
- Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Japan
| | - Akihiro Iguchi
- Department of Pediatrics, Hokkaido University Hospital, Sapporo, Japan
| | - Taku Miyasho
- Department of Veterinary Science, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan
| |
Collapse
|
17
|
Abstract
Effective leukemia treatment is seriously hampered by drug resistance, and the potential role of epigenetic mechanisms in cancer drug resistance has recently been investigated. With conventional anticancer drugs, including alkylating drugs, anti-metabolite drugs, topoisomerase inhibitors, and microtubule inhibitors-which have been available for half a century-drug resistance often develops because of decreased expression of target enzymes, in conjunction with increased expression of drug export pumps. Alterations of target gene expression and increased export pump function might be caused by epigenetic changes, such as alterations in methylation status, as well as by changes in histone acetylation status. In addition, newly developed anticancer drugs, including small-molecule drugs, such as kinase inhibitors, antibody drugs, and immune modulatory drugs, also resulted in development of drug resistance within 1 year, although these drugs showed significant effectiveness for patients resistant to conventional anticancer drugs. The resistant cells exhibited increased expression of bypass pathways, activation of downstream cascades, decreased expression of antigens of tumor cells, increased DNA repair activity, and increased expression of drug export pumps, which also suggests the presence of epigenetic changes. This article reviews drug resistance in cancer therapy and the possible roles of epigenetic mechanisms.
Collapse
Affiliation(s)
- Takeshi Asano
- Department of Pediatrics, Nippon Medical School, Tokyo, Japan
| |
Collapse
|
18
|
Shindo Y, Kuribara H, Matsuoka T, Futo S, Sawada C, Shono J, Akiyama H, Goda Y, Toyoda M, Hino A, Asano T, Hiramoto M, Iwaya A, Jeong SI, Kajiyama N, Kato H, Katsumoto H, Kim YM, Kwak HS, Ogawa M, Onozuka Y, Takubo K, Yamakawa H, Yamazaki F, Yoshida A, Yoshimura T. Validation of Real-Time PCR Analyses for Line-Specific Quantitation of Genetically Modified Maize and Soybean UsingNew Reference Molecules. J AOAC Int 2019. [DOI: 10.1093/jaoac/85.5.1119] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Novel analytical methods based on real-time quantitative polymerase chain reactions by use of new reference molecules were validated in interlaboratory studies for the quantitation of genetically modified (GM) maize and soy. More than 13 laboratories from Japan, Korea, and the United States participated in the studies. The interlaboratory studies included 2 separate stages: (1) measurement tests of coefficient values, the ratio of recombinant DNA (r-DNA) sequence, and endogenous DNA sequence in the seeds of GM maize and GM soy; and (2) blind tests with 6 pairs of maize and soy samples, including different levels of GM maize or GM soy. Test results showed that the methods are applicable to the specific quantitation of the 5 lines of GM maize and one line of GM soy. After statistical treatment to remove outliers, the repeatability and reproducibility of these methods at a level of 5.0% were <13.7 and 15.9%, respectively. The quantitation limits of the methods were 0.50% for Bt11, T25, and MON810, and 0.10% for GA21, Event176, and Roundup Ready soy. The results of blind tests showed that the numerical information obtained from these methods will contribute to practical analyses for labeling systems of GM crops.
Collapse
Affiliation(s)
- Yoichiro Shindo
- Fundamental Research Laboratory, Asahi Breweries Ltd., 1-1-21 Midori, Moriya, Kitasoma-gun, Ibaraki 302-0106, Japan
| | - Hideo Kuribara
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Takeshi Matsuoka
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Satoshi Futo
- FASMAC Co., Ltd., 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Chihiro Sawada
- Japan Frozen Foods Inspection Corp., Nishi-1 Koyo, Higashinada-ku, Kobe, Hyogo 658-0033, Japan
| | - Jinji Shono
- Somatech Center, House Foods Co., 1-4 Takanodai, Yotsukaido, Chiba 284-0033, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Yukihiro Goda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Masatake Toyoda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Akihiro Hino
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Dai Z, Asano T, Ohde S, Komiyama N. P1643An exploratory analysis for the optimal monitoring interval of N-terminal pro-B-type natriuretic peptide in patients with stable heart failure. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
N-terminal pro-B-type natriuretic peptide (NT-proBNP) is a potential biomarker for monitoring the status of heart failure. However, the optimal monitoring interval is unknown. This study aims to investigate minimal informative monitoring interval of NT-proBNP in patients with stable chronic heart failure.
Methods
In this retrospective open cohort study, adult patients followed up at a tertiary hospital for chronic heart failure with NT-proBNP measurements were included if they had been previously admitted due to acute heart failure and were free from readmission over 6 months after discharge. We analyzed NT-proBNP measured between 6 months after discharge and the timepoint of an alteration of medication regimen or readmission due to worsening of heart failure. To distinguish actual progression of the disease from biological variability and measurement error, the signal-to-noise ratio method was applied with a random-effects model. Stratified analysis was performed according to underlying risks.
Results
In this analysis, 368 patients were included with NT-proBNP measured between July 2009 and December 2017. The patients had 6.0 times of NT-proBNP measurements in median (interquartile range [IQR] 4.0–10.0) during the follow-up period (median 12.0 months [IQR 6.0–27.0]). In the estimates of the random-effects model, signal (i.e. actual progression of the disease) exceeded noise (i.e. biological variability and measurement error) at 8.1 months (95% confidence interval [CI]: 5.7–10.1) after the index measurement. In a subgroup analysis according to the AHEAD risk score, the minimal informative monitoring interval was shortened as the risk score increased (0–1 point: 12.3 months [95% CI: 10.3–14.5]; 2–3 points: 8.0 months [95% CI: 6.8–9.7]; 4–5 points: 3.3 months [95% CI: 3.0–3.8]; Figure).
Informative intervals stratified by risk
Conclusion
In patients with stable chronic heart failure, the overall minimal informative monitoring interval of NT-proBNP measurement was 8.1 months, which varies by underlying risk. The optimal monitoring interval could be lengthened especially for patients at lower risk.
Collapse
Affiliation(s)
- Z Dai
- St. Luke's International Hospital, Department of Cardiology, Tokyo, Japan
| | - T Asano
- St. Luke's International Hospital, Department of Cardiology, Tokyo, Japan
| | - S Ohde
- St. Luke's International University, Graduate School of Public Health, Tokyo, Japan
| | - N Komiyama
- St. Luke's International Hospital, Department of Cardiology, Tokyo, Japan
| |
Collapse
|
20
|
Arakawa T, Norimoto S, Iwakiri S, Asano T, Niimi Y. Cavity resonator for circularly polarized microwave irradiation mounted on a cryostat. Rev Sci Instrum 2019; 90:084707. [PMID: 31472660 DOI: 10.1063/1.5098846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/07/2019] [Indexed: 06/10/2023]
Abstract
We have constructed a cylindrical cavity resonator with a hybrid coupler where circularly polarized microwaves can be irradiated to a sample. The polarity of the microwave can be switched by changing the input ports of the hybrid coupler. The cavity resonator is small enough to be mounted on a cryostat which enables us to change the sample temperature in a wide range. To demonstrate the performance of the cavity resonator mounted on a cryostat, Yttrium Iron Garnet (YIG) was used as a test sample. We succeeded in selectively exciting left and right circularly polarized modes with high polarization (>80%). We also evaluated the susceptibility tensor of YIG in the cryostat. The technique presented here would offer a new direction in the fields of spintronics and quantum information.
Collapse
Affiliation(s)
- T Arakawa
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Norimoto
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Iwakiri
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Asano
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Niimi
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| |
Collapse
|
21
|
Ueda T, Migita M, Itabashi T, Tanabe Y, Uchimura R, Gocho Y, Yamanishi M, Kobayashi F, Yoshino M, Fujita A, Yamanishi S, Kaizu K, Hayakawa J, Asano T, Maeda M, Itoh Y. Therapy-related Secondary Malignancy After Treatment of Childhood Malignancy: Cases from a Single Center. J NIPPON MED SCH 2019; 86:207-214. [DOI: 10.1272/jnms.jnms.2018_86-401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | - Mio Yoshino
- Department of Pediatrics, Nippon Medical School
| | - Atsushi Fujita
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | | | | | | | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Miho Maeda
- Department of Pediatrics, Nippon Medical School
| | | |
Collapse
|
22
|
Takamiya S, Osanai T, Seki T, Fujima N, Hida K, Asano T, Yamazaki K, Hamauchi S, Sasamori T, Ono K, Terasaka S, Houkin K. Estimation of the number of feeding arteries of spinal arteriovenous malformations by using three-dimensional digital subtraction angiography. Eur Spine J 2018; 28:842-848. [PMID: 30535513 DOI: 10.1007/s00586-018-5852-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 12/05/2018] [Indexed: 11/24/2022]
Abstract
PURPOSE Spinal angiography is the gold standard for evaluation or diagnosis of spinal arteriovenous malformations (AVMs). However, some feeding arteries might be overlooked when multiple feeders exist. This study aimed to retrospectively review cases of spinal intra-dural AVMs, which were identified by three-dimensional digital subtraction angiography (3D-DSA), and attempted to estimate the number of feeding arteries. METHODS We retrospectively reviewed patients with spinal intra-dural AVMs who underwent 3D-DSA at Hokkaido University Hospital from January 2005 to December 2016. We selected 9 patients in whom we could obtain data of multi-planar reconstruction of 3D-DSA. We measured the computed tomography (CT) values of feeding arteries and draining veins. The CT values represented the averages of maximum CT values of 5 continuous axial slices. The ratio of the CT value of feeders to that of drainers (F/D ratio) was calculated. The correlation between the F/D ratio and the number of feeders was examined with Pearson's correlation coefficient. RESULTS The average number of feeders was 2.3 (1-4), and the number of feeders was significantly positively correlated with the F/D ratio (r = 0.855, P = .003). CONCLUSIONS We conclude that the number of feeding arteries of spinal intra-dural AVMs can be estimated by using the F/D ratio obtained from 3D-DSA. These slides can be retrieved under Electronic Supplementary Material.
Collapse
Affiliation(s)
- Soichiro Takamiya
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Toshiya Osanai
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
| | - Toshitaka Seki
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Noriyuki Fujima
- Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
| | - Kazutoshi Hida
- Department of Neurosurgery, Sapporo Azabu Neurosurgical Hospital, Sapporo, Japan
| | - Takeshi Asano
- Department of Neuroendovascular, Chiba Medical Center, Chiba, Japan
| | - Kazuyoshi Yamazaki
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shuji Hamauchi
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Toru Sasamori
- Department of Neurosurgery, Sapporo Azabu Neurosurgical Hospital, Sapporo, Japan
| | - Kota Ono
- Clinical Research and Medical Innovation Center, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | - Shunsuke Terasaka
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kiyohiro Houkin
- Department of Neurosurgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| |
Collapse
|
23
|
Nishigori A, Hatori T, Asano T. An 8-Year-Old Girl with Autoimmune Hepatitis Following Aplastic Anemia. J NIPPON MED SCH 2018; 85:241-244. [PMID: 30259895 DOI: 10.1272/jnms.jnms.2018_85-38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We herein report a case of severe aplastic anemia diagnosed in an 8-year-old girl with a previous diagnosis of autoimmune hepatitis. We found significantly increased CD8+ and CD68+ cell numbers in her bone marrow, which can induce severe organ damage, refractory to immunosuppressive therapy.
Collapse
Affiliation(s)
- Ayako Nishigori
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Tsutomu Hatori
- Department of Pathology, Nippon Medical School Chiba Hokusoh Hospital
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| |
Collapse
|
24
|
Modolo R, Collet C, Miyazaki Y, Chichareon P, Asano T, Katagiri Y, Tenekecioglu E, Walsh S, Lesiak M, Moreno R, Escaned J, Banning A, Onuma Y, Serruys PW. P2639Clinical outcomes with the state-of-the-art PCI for the treatment of bifurcation lesions: a sub-analysis of the SYNTAX II study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R Modolo
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - Y Miyazaki
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - P Chichareon
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - T Asano
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - Y Katagiri
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - E Tenekecioglu
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - S Walsh
- Belfast Health and Social Care Trust, Department of Cardiology, Belfast, United Kingdom
| | - M Lesiak
- Poznan University of Medical Sciences, Department of Cardiology, Poznan, Poland
| | - R Moreno
- University Hospital La Paz, Department of Cardiology, Madrid, Spain
| | - J Escaned
- Hospital Clinic San Carlos, Department of Cardiology, Madrid, Spain
| | - A Banning
- John Radcliffe Hospital, Department of Cardiology, Oxford, United Kingdom
| | - Y Onuma
- Erasmus Medical Center, Department of Cardiology, Rotterdam, Netherlands
| | - P W Serruys
- Imperial College London, Department of Cardiology, London, United Kingdom
| | | |
Collapse
|
25
|
Sano T, Suzuki T, Nishigori A, Miyatake C, Koizumi S, Kaizu K, Fujita A, Kamisago M, Chang B, Ishiwada N, Asano T. The Incidence of Pediatric Invasive Bacterial Diseases in Nippon Medical School Chiba Hokusoh Hospital before and after the Introduction of Conjugate Vaccines. J NIPPON MED SCH 2018. [PMID: 29540644 DOI: 10.1272/jnms.2018_85-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The introduction of the Haemophilus influenzae type b (Hib) vaccine and the 7-valent pneumococcal conjugate vaccine (PCV7) has led to dramatic reductions in cases of invasive H. influenzae disease and invasive pneumococcal disease (IPD). After the introduction of the PCV7 and the 13-valent pneumococcal conjugate vaccine (PCV13), the number of children with IPD markedly decreased in our hospital. However, since 2015, three children with IPD have been admitted to our hospital. We analyzed the serotype, multilocus sequence type, and antimicrobial susceptibility of Streptococcus pneumoniae strains isolated in these newly diagnosed cases. The strains were serotypes 7F and 12F. In addition, we analyzed the incidence of invasive bacterial disease before and after the introduction of conjugate vaccines and found no change in the incidences. We found that cases of IPD and invasive H. influenzae disease clearly decreased following the introduction of the PCV7, the PCV13, and the Hib vaccine, as well as disease caused by antibiotic-resistant strains.
Collapse
Affiliation(s)
- Toumi Sano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Tamaho Suzuki
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Ayako Nishigori
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Chiharu Miyatake
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Shinya Koizumi
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Kiyohiko Kaizu
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Atsushi Fujita
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | | | - Bin Chang
- Department of Bacteriology I, National Institute of Infectious Diseases
| | - Naruhiko Ishiwada
- Department of Infectious Diseases, Medical Mycology Research Center, Chiba University
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| |
Collapse
|
26
|
Asano T, Onuma Y, Escaned J, Van Der Schaaf R, Van Geuns R, Piek J, Serruys P. P3627The assessment of microvascular resistance and conductance three years after the implantation of Absorb bioresorbable vascular scaffold and Xience metallic stent: ABSORB II pressure-velocity substudy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Asano
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J Escaned
- Hospital Clinic San Carlos, Madrid, Spain
| | | | - R Van Geuns
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J Piek
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - P Serruys
- Imperial College London, London, United Kingdom
| |
Collapse
|
27
|
Asano T, Onuma Y, Collet C, Sabate M, Morice M, Chevalier B, Windecker S, Serruys P. P573Angiographic late lumen loss revisited: impact on target lesion revascularization and device thrombosis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T Asano
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - M Sabate
- Hospital Clinic de Barcelona, Barcelona, Spain
| | - M Morice
- Institut Cardiovasculaire Paris Sud, Paris, France
| | - B Chevalier
- Institut Cardiovasculaire Paris Sud, Paris, France
| | | | - P Serruys
- Imperial College London, London, United Kingdom
| |
Collapse
|
28
|
Chichareon P, Collet C, Tenekecioglu E, Asano T, Katagiri Y, Miyazaki Y, Modolo R, Takahashi K, Kogame N, Onuma Y, Serruys P. P5344Clinical outcomes after primary PCI using contemporary drug eluting stents: evidence from a network meta-analysis comprising 12,639 patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- P Chichareon
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - E Tenekecioglu
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - T Asano
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Katagiri
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Miyazaki
- Erasmus Medical Center, Rotterdam, Netherlands
| | - R Modolo
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - K Takahashi
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - N Kogame
- Academic Medical Center of Amsterdam, Amsterdam, Netherlands
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| | - P Serruys
- Imperial College London, London, United Kingdom
| |
Collapse
|
29
|
Katagiri Y, Serruys PW, Tenekecioglu E, Asano T, Collet C, Miyazaki Y, Piek JJ, Wykrzykowska J, Chevalier B, Mintz G, Onuma Y. P6374Acute and long-term relocation of minimal lumen area after Absorb bioresorbable scaffold or Xience metallic stent implantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Katagiri
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - P W Serruys
- Imperial College London, London, United Kingdom
| | | | - T Asano
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - C Collet
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - Y Miyazaki
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J J Piek
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - J Wykrzykowska
- Academic Medical Center of Amsterdam, Department of Cardiology, Amsterdam, Netherlands
| | - B Chevalier
- Institut Hospitalier Jacques Cartier, Massy, France
| | - G Mintz
- Cardiovascular Research Foundation, New York, United States of America
| | - Y Onuma
- Erasmus Medical Center, Rotterdam, Netherlands
| |
Collapse
|
30
|
Tsuno K, Miyatake C, Nishijima H, Hotta C, Ogawa T, Asano T. Coxsackievirus B5 Aseptic Meningitis in Infants in Chiba Prefecture, Japan, in 2016. J NIPPON MED SCH 2018; 85:187-190. [DOI: 10.1272/jnms.jnms.2018_85-28] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Kanae Tsuno
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Chiharu Miyatake
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | - Haruna Nishijima
- Division of Virology, Chiba Prefectural Institute of Public Health
| | - Chiemi Hotta
- Division of Virology, Chiba Prefectural Institute of Public Health
| | - Tomoko Ogawa
- Division of Virology, Chiba Prefectural Institute of Public Health
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| |
Collapse
|
31
|
Ikari N, Shimizu A, Asano T. Lysosomal Acid Lipase Deficiency in Japan: A Case Report of Siblings and a Literature Review of Cases in Japan. J NIPPON MED SCH 2018; 85:131-137. [DOI: 10.1272/jnms.2018_85-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
| | - Akira Shimizu
- Department of Diagnostic Pathology, Nippon Medical School Hospital
| | | |
Collapse
|
32
|
Uemura MT, Asano T, Hikawa R, Yamakado H, Takahashi R. Zonisamide inhibits monoamine oxidase and enhances motor performance and social activity. Neurosci Res 2017. [DOI: 10.1016/j.neures.2017.05.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
33
|
Narazaki H, Terada Y, Kaizu K, Jitsukawa T, Ito Y, Asano T. Therapeutic Drug Monitoring Simulator for Antibiotic Dosage for Methicillin-Resistant Staphylococcus aureus Sepsis in a Patient with Primary Immunodeficiency on Peritoneal Dialysis. J NIPPON MED SCH 2017; 84:177-182. [PMID: 28978898 DOI: 10.1272/jnms.84.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bacterial infections often cause fatal systemic infections in patients with primary immunodeficiency. To prevent unfortunate results, the selection, dose, and dosage of antibiotics are extremely important. Here, we report a case of Wiskott-Aldrich syndrome in a patient undergoing peritoneal dialysis because of chronic renal failure in whom methicillin-resistant Staphylococcus aureus sepsis developed. Because of the primary disease and complications, teicoplanin was the only chosen anti-S. aureus drug to prevent side effects. We used parameter estimation and dosage adjustment from a therapeutic drug monitoring simulation software program to overcome the challenges with teicoplanin treatment.
Collapse
Affiliation(s)
| | | | | | - Toyo Jitsukawa
- Department of Pharmacy, Nippon Medical School, Chiba Hokuso Hospital.,Division of Infection Control and Prevention, Nippon Medical School, Chiba Hokusoh Hospital
| | | | | |
Collapse
|
34
|
Osanai T, Hida K, Asano T, Seki T, Sasamori T, Houkin K. Ten-Year Retrospective Study on the Management of Spinal Arteriovenous Lesions: Efficacy of a Combination of Intraoperative Digital Subtraction Angiography and Intraarterial Dye Injection. World Neurosurg 2017; 104:841-847. [DOI: 10.1016/j.wneu.2017.05.081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/12/2017] [Accepted: 05/13/2017] [Indexed: 11/16/2022]
|
35
|
Zeng Y, Zeng Y, Cavalcante R, Collet C, Tenekecioglu E, Sotomi Y, Miyazaki Y, Katagiri Y, Asano T, Abdelghani M, Nie S, Bourantas C, Bruining N, Onuma Y, Serruys P. P2398Coronary calcification as a mechanism of plaque media shrinkage a multimodality intracoronary imaging study. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
36
|
Sano T, Nagayasu S, Suzuki S, Iwashita M, Yamashita A, Shinjo T, Sanui T, Kushiyama A, Kanematsu T, Asano T, Nishimura F. Epicatechin downregulates adipose tissue CCL19 expression and thereby ameliorates diet-induced obesity and insulin resistance. Nutr Metab Cardiovasc Dis 2017; 27:249-259. [PMID: 28062181 DOI: 10.1016/j.numecd.2016.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/05/2016] [Accepted: 11/11/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Epicatechin (EC) intake has been suggested to be beneficial for the prevention of cardiovascular disorders, and it is well known that adipose tissue inflammation is one of the major risk factors for coronary heart diseases. The purpose of the present study was to determine the in vitro and in vivo effects of EC on adipose tissue inflammation and obesity. METHODS AND RESULTS DNA microarray analysis was performed to evaluate the effects of EC on gene expression in adipocytes co-cultured with bacterial endotoxin-stimulated macrophages. To determine the in vivo effects of the catechin, C57BL/6 mice were fed either a high-fat diet (HFD) or HFD combined with EC, and metabolic changes were observed EC suppressed the expression of many inflammatory genes in the adipocytes co-cultured with endotoxin-stimulated macrophages. Specifically, EC markedly suppressed chemokine (CC motif) ligand 19 (CCL19) expression. The target cell of EC appeared to macrophages. The in vivo study indicated that mice fed the EC-supplemented HFD were protected from diet-induced obesity and insulin resistance. Accordingly, the expression levels of genes associated with inflammation in adipose tissue and in the liver were downregulated in this group of mice. CONCLUSIONS EC exerts beneficial effects for the prevention of adipose tissue inflammation and insulin resistance. Since we previously reported that mice deficient in the CCL19 receptor were protected from diet-induced obesity and insulin resistance, it can be concluded that the beneficial effects of EC could be mediated, at least in part, by marked suppression of CCL19 expression.
Collapse
Affiliation(s)
- T Sano
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - S Nagayasu
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - S Suzuki
- Department of Dental Science for Health Promotion, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - M Iwashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Yamashita
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Shinjo
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - T Sanui
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - A Kushiyama
- Division of Metabolic Diseases, The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
| | - T Kanematsu
- Department of Cellular and Molecular Pharmacology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - T Asano
- Department of Biological Chemistry, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan
| | - F Nishimura
- Section of Periodontology, Kyushu University Faculty of Dental Science, Fukuoka, Japan.
| |
Collapse
|
37
|
Shitara K, Kuwabara A, Fisher CAJ, Ogawa T, Asano T, Kaneko Y, Omote A, Moriwake H. Effect of oxygen vacancy segregation in Au or Pt/oxide hetero-interfaces on electronic structures. RSC Adv 2017. [DOI: 10.1039/c7ra04804a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We investigated the effects of oxygen vacancy segregation on electronic structures in the vicinity of hetero-interfaces between noble metals (Au and Pt) and yttria stabilized zirconia by performing first-principles calculations and Bader analysis.
Collapse
Affiliation(s)
- K. Shitara
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
- Research and Services Division of Materials Data and Integrated System
| | - A. Kuwabara
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
- Research and Services Division of Materials Data and Integrated System
| | - C. A. J. Fisher
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
| | - T. Ogawa
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
| | - T. Asano
- Advanced Research Division
- Panasonic Corporation
- Kyoto
- Japan
| | - Y. Kaneko
- Advanced Research Division
- Panasonic Corporation
- Kyoto
- Japan
| | - A. Omote
- Advanced Research Division
- Panasonic Corporation
- Kyoto
- Japan
| | - H. Moriwake
- Nanostructures Research Laboratory
- Japan Fine Ceramics Center
- Nagoya
- Japan
- Research and Services Division of Materials Data and Integrated System
| |
Collapse
|
38
|
Asano T, Narazaki H, Fujita A. Genome-wide DNA methylation profiling of CpG islands in a morpholino anthracycline derivative-resistant leukemia cell line: p38 α as a novel candidate for resistance. Pharmacol Res Perspect 2016; 5:e00285. [PMID: 28596837 PMCID: PMC5461645 DOI: 10.1002/prp2.285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 11/12/2016] [Accepted: 11/27/2016] [Indexed: 11/18/2022] Open
Abstract
Effective leukemia treatment is seriously hampered by drug resistance. We previously showed that aberrant methylation of the topoisomerase IIα gene causes altered gene expression and acquired drug resistance in etoposide‐resistant leukemia cells. In this study, we analyzed the genome‐wide methylation status in resistant leukemia cells. We used MX2, which is a morpholino anthracycline derivative that functions as a topoisomerase IIα inhibitor. We established a human myelogenous leukemia cell line (K562/P) and a related cell line with resistance to MX2 (K562/MX2). Using these cell lines, we investigated the genome‐wide methylation status, compared expression profiles with a microarray, and analyzed the data using Gene Ontology and key node analysis. We demonstrate that the MX2‐resistant cell line was globally hypermethylated. Gene Ontology analysis identified genes involved in the immunological response and gene silencing that were responsible for methylation‐related altered gene expression in drug‐resistant cells. Key node analysis showed that p38α mitogen‐activated protein kinase was a novel enzyme involved in MX2‐related resistance. p38 kinase activity in resistant cells was increased compared to MX2‐sensitive parent cells. Blocking p38α activity using inhibitors and p38α knock down with small interfering RNA restored the sensitivity to MX2 in resistant cells with a decrease in p38 kinase activity as well as decreased expression of p38α mRNA and phosphorylated p38α protein. These findings may lead to a new strategy for treatment of drug‐resistant leukemia cells.
Collapse
Affiliation(s)
- Takeshi Asano
- Department of Pediatrics Nippon Medical School Tokyo Japan
| | | | - Atsushi Fujita
- Department of Pediatrics Nippon Medical School Tokyo Japan
| |
Collapse
|
39
|
Sato A, Asano T, Isono M, Okubo K, Asano T. Ritonavir interacts with ixazomib synergistically to cause ubiquitinated protein accumulation and endoplasmic reticulum stress in bladder cancer cells. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61435-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
40
|
Nakaseko K, Asano T. AB0784 A Study of Serum Electrolyte Levels after Denosumab Administration. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
41
|
Sato S, Asano T, Kobayashi H, Watanabe H, Ohira H. AB0572 Impact of Aging on The Clinical Features and Treatment of Anca Associated Vasculitis in The Elderly. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
42
|
Okuda H, Noguchi A, Kobayashi H, Kondo D, Harada KH, Youssefian S, Shioi H, Kabata R, Domon Y, Kubota K, Kitano Y, Takayama Y, Hitomi T, Ohno K, Saito Y, Asano T, Tominaga M, Takahashi T, Koizumi A. Infantile Pain Episodes Associated with Novel Nav1.9 Mutations in Familial Episodic Pain Syndrome in Japanese Families. PLoS One 2016; 11:e0154827. [PMID: 27224030 PMCID: PMC4880298 DOI: 10.1371/journal.pone.0154827] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 04/19/2016] [Indexed: 12/19/2022] Open
Abstract
Painful peripheral neuropathy has been correlated with various voltage-gated sodium channel mutations in sensory neurons. Recently Nav1.9, a voltage-gated sodium channel subtype, has been established as a genetic influence for certain peripheral pain syndromes. In this study, we performed a genetic study in six unrelated multigenerational Japanese families with episodic pain syndrome. Affected participants (n = 23) were characterized by infantile recurrent pain episodes with spontaneous mitigation around adolescence. This unique phenotype was inherited in an autosomal-dominant mode. Linkage analysis was performed for two families with 12 affected and nine unaffected members, and a single locus was identified on 3p22 (LOD score 4.32). Exome analysis (n = 14) was performed for affected and unaffected members in these two families and an additional family. Two missense variants were identified: R222H and R222S in SCN11A. Next, we generated a knock-in mouse model harboring one of the mutations (R222S). Behavioral tests (Hargreaves test and cold plate test) using R222S and wild-type C57BL/6 (WT) mice, young (8-9 weeks old; n = 10-12 for each group) and mature (36-38 weeks old; n = 5-6 for each group), showed that R222S mice were significantly (p < 0.05) more hypersensitive to hot and cold stimuli than WT mice. Electrophysiological studies using dorsal root ganglion neurons from 8-9-week-old mice showed no significant difference in resting membrane potential, but input impedance and firing frequency of evoked action potentials were significantly increased in R222S mice compared with WT mice. However, there was no significant difference among Nav1.9 (WT, R222S, and R222H)-overexpressing ND7/23 cell lines. These results suggest that our novel mutation is a gain-of-function mutation that causes infantile familial episodic pain. The mouse model developed here will be useful for drug screening for familial episodic pain syndrome associated with SCN11A mutations.
Collapse
Affiliation(s)
- Hiroko Okuda
- Department of Health and Environmental Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Atsuko Noguchi
- Department of Pediatrics, Akita University School of Medicine, Akita, Japan
| | - Hatasu Kobayashi
- Department of Health and Environmental Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Daiki Kondo
- Department of Pediatrics, Akita University School of Medicine, Akita, Japan
| | - Kouji H. Harada
- Department of Health and Environmental Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shohab Youssefian
- Laboratory of Molecular Biosciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hirotomo Shioi
- Department of Health and Environmental Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Risako Kabata
- Department of Health and Environmental Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yuki Domon
- Biological Research Laboratories, Daiichi Sankyo Co., Ltd., Shinagawa-ku, Tokyo, Japan
| | - Kazufumi Kubota
- Biological Research Laboratories, Daiichi Sankyo Co., Ltd., Shinagawa-ku, Tokyo, Japan
| | - Yutaka Kitano
- Biological Research Laboratories, Daiichi Sankyo Co., Ltd., Shinagawa-ku, Tokyo, Japan
| | - Yasunori Takayama
- Okazaki Institute for Integrative Bioscience, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Aichi, Japan
| | - Toshiaki Hitomi
- Department of Preventive Medicine, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Kousaku Ohno
- Department of Pediatrics, Sanin Rosai Hospital, Tottori, Japan
| | - Yoshiaki Saito
- Division of Child Neurology, Institute of Neurological Sciences, Faculty of Medicine, Tottori University, Tottori, Japan
| | - Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Makoto Tominaga
- Okazaki Institute for Integrative Bioscience, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Aichi, Japan
| | - Tsutomu Takahashi
- Department of Pediatrics, Akita University School of Medicine, Akita, Japan
- * E-mail: (AK); (TT)
| | - Akio Koizumi
- Department of Health and Environmental Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- * E-mail: (AK); (TT)
| |
Collapse
|
43
|
Inokuchi J, Kuroiwa K, Naito S, Kakehi Y, Sugimoto M, Tanikawa T, Fujimoto H, Gotoh M, Masumori N, Ogawa O, Etoh M, Ohyama C, Yamaguchi A, Matsuyama H, Ichikawa T, Asano T, Takenaka A, Fujimoto K, Yamaguchi R, Habuchi T, Hashine K, Arai Y, Nagaoka A, Nishiyama H, Shinohara N, Niwakawa M, Egawa S, Ozono S, Kawano Y, Ishizuka O, Nishimura K, Tochigi T, Sugimura Y, Mizusawa J, Eba J. 801 The impact of ureteral ligation on clinical outcome during radical nephroureterectomy for upper urinary tract urothelial carcinoma: Multi-institutional case series study JCOG1110A. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1569-9056(16)60803-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
44
|
|
45
|
Asano T, Narazaki H, Kaizu K, Matsukawa S, Takema-Tochikubo Y, Fujii S, Saitoh N, Mashiko K, Fujino O. Neglect-induced pseudo-thrombotic thrombocytopenic purpura due to vitamin B12 deficiency. Pediatr Int 2015; 57:988-90. [PMID: 26387768 DOI: 10.1111/ped.12718] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 12/09/2014] [Accepted: 02/13/2015] [Indexed: 11/26/2022]
Abstract
Although thrombotic thrombocytopenic purpura (TTP) is rare, early diagnosis and treatment are important for decreasing the mortality rate. Acquired vitamin B12 deficiency is frequently overlooked because of its rarity in developed countries, particularly in children and adolescents. The hematological changes in vitamin B12 deficiency present as megaloblastic anemia, increased lactate dehydrogenase, vasoconstriction, increased platelet aggregation, and abnormal activation of the coagulation followed by microangiopathy as well as neutropenia and thrombocytopenia. We report herein the case of a 15-year-old girl who had been neglected, which might have caused pseudo-TTP through malnutrition, particularly vitamin B12 deficiency. When we encounter cases of TTP in children, clinicians must be aware of the possibility of malnutrition, particularly with vitamin B12 deficiency, even in developed countries, and investigate the cause of malnutrition including neglect.
Collapse
Affiliation(s)
- Takeshi Asano
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Hidehiko Narazaki
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Kiyohiko Kaizu
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Shouhei Matsukawa
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Yuki Takema-Tochikubo
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Shuichi Fujii
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Nobuyuki Saitoh
- Department of Emergency and Critical Care Medicine, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Kunihiko Mashiko
- Department of Emergency and Critical Care Medicine, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| | - Osamu Fujino
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital, Inzai City, Chiba, Japan
| |
Collapse
|
46
|
Imai Y, Kobayashi Y, Inoshita T, Meng H, Arano T, Uemura K, Asano T, Yoshimi K, Zhang CL, Matsumoto G, Ohtsuka T, Kageyama R, Kiyonari H, Shioi G, Nukina N, Hattori N, Takahashi R. The Parkinson's Disease-Associated Protein Kinase LRRK2 Modulates Notch Signaling through the Endosomal Pathway. PLoS Genet 2015; 11:e1005503. [PMID: 26355680 PMCID: PMC4565672 DOI: 10.1371/journal.pgen.1005503] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 08/14/2015] [Indexed: 12/03/2022] Open
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is a key molecule in the pathogenesis of familial and idiopathic Parkinson’s disease (PD). We have identified two novel LRRK2-associated proteins, a HECT-type ubiquitin ligase, HERC2, and an adaptor-like protein with six repeated Neuralized domains, NEURL4. LRRK2 binds to NEURL4 and HERC2 via the LRRK2 Ras of complex proteins (ROC) domain and NEURL4, respectively. HERC2 and NEURL4 link LRRK2 to the cellular vesicle transport pathway and Notch signaling, through which the LRRK2 complex promotes the recycling of the Notch ligand Delta-like 1 (Dll1)/Delta (Dl) through the modulation of endosomal trafficking. This process negatively regulates Notch signaling through cis-inhibition by stabilizing Dll1/Dl, which accelerates neural stem cell differentiation and modulates the function and survival of differentiated dopaminergic neurons. These effects are strengthened by the R1441G ROC domain-mutant of LRRK2. These findings suggest that the alteration of Notch signaling in mature neurons is a component of PD etiology linked to LRRK2. LRRK2 is linked to autosomal dominant late-onset Parkinson’s disease, suggesting that LRRK2 gain-of-function mutations lead to age-dependent degeneration of the midbrain dopaminergic neurons. In this study, we describe two novel LRRK2-associated proteins HERC2 and NEURL4, which are a ubiquitin ligase and an adaptor-like protein, respectively. HERC2 and NEURL4 direct LRRK2 to Notch signaling pathway, in which the LRRK2-NEURL4-HERC2 complex promotes the recycling of the Notch ligand Delta-like 1 (Dll1)/Delta (Dl) through the modulation of endosomal trafficking. As a result, the amounts of Dll1/D1 on the plasma membrane are increased, which affects negatively Notch signaling through cis-inhibition. The effect is enhanced by a Parkinson’s-disease associated mutation of LRRK2. Inhibition of Notch signaling in adult dopaminergic neurons impairs its functions and survival. These findings indicate a possible link between Notch pathway and Parkinson’s disease.
Collapse
Affiliation(s)
- Yuzuru Imai
- Department of Research for Parkinson's Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan
- * E-mail: (YI); (NH); (RT)
| | - Yoshito Kobayashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- CREST (Core Research for Evolutionary Science and Technology), Japan Science and Technology Agency, Saitama, Japan
| | - Tsuyoshi Inoshita
- Department of Research for Parkinson's Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hongrui Meng
- Research Institute for Diseases of Old Age, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Taku Arano
- Department of Research for Parkinson's Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kengo Uemura
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takeshi Asano
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kenji Yoshimi
- Department of Neurophysiology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Chang-Liang Zhang
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- CREST (Core Research for Evolutionary Science and Technology), Japan Science and Technology Agency, Saitama, Japan
| | - Gen Matsumoto
- Department of Neuroscience for Neurodegenerative Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshiyuki Ohtsuka
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Kyoto, Japan
| | - Ryoichiro Kageyama
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Kyoto, Japan
| | - Hiroshi Kiyonari
- Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Developmental Biology, Kobe, Japan
| | - Go Shioi
- Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Developmental Biology, Kobe, Japan
| | - Nobuyuki Nukina
- Department of Neuroscience for Neurodegenerative Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Nobutaka Hattori
- Department of Research for Parkinson's Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan
- CREST (Core Research for Evolutionary Science and Technology), Japan Science and Technology Agency, Saitama, Japan
- Research Institute for Diseases of Old Age, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Neuroscience for Neurodegenerative Disorders, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Neurology, Juntendo University Graduate School of Medicine, Tokyo, Japan
- * E-mail: (YI); (NH); (RT)
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- CREST (Core Research for Evolutionary Science and Technology), Japan Science and Technology Agency, Saitama, Japan
- * E-mail: (YI); (NH); (RT)
| |
Collapse
|
47
|
Ito T, Kenmochi T, Nishikawa T, Maruyama M, Kusaka M, Sasaki H, Asano T, Matsubara H, Hoshinaga K. A novel screening test for detecting graft thrombosis after pancreatic transplantation using contrast-enhanced ultrasonography with sonazoid. Transplant Proc 2015; 46:1917-9. [PMID: 25131070 DOI: 10.1016/j.transproceed.2014.05.071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Pancreatic graft thrombosis is the primary cause of nonimmunologic graft loss, with an incidence ranging from 5% to 15%. Therefore, developing a screening test to detect graft thrombosis after pancreatic transplantation is important. We created a screening test to assess graft thrombosis after pancreatic transplantation using contrast-enhanced ultrasonography (CEUS) with Sonazoid in addition to Doppler ultrasonography. A total of seven patients were examined using CEUS after undergoing pancreatic transplantation. All patients were observed to have a clear blood flow from the horizontal region to the peripheral region of the splenic vein in the pancreatic graft, and only one of the seven patients exhibited a blood flow in the horizontal portion of the splenic vein on Doppler ultrasonography performed immediately after pancreatic transplantation. Results from CEUS with Sonazoid showed the blood flow in the splenic vein and parenchyma of the pancreatic graft in detail, despite the slow and lateral blood flow in the splenic vein of the pancreatic graft immediately after transplantation.
Collapse
Affiliation(s)
- T Ito
- Department of Organ Transplant Surgery, Fujita Health University, School of Medicine, Aichi, Japan.
| | - T Kenmochi
- Department of Organ Transplant Surgery, Fujita Health University, School of Medicine, Aichi, Japan
| | - T Nishikawa
- Division of Liver Biliary Tract and Pancreas Disease, Fujita Health University, School of Medicine, Aichi, Japan
| | - M Maruyama
- Department of Surgery, National Hospital Organization, Chiba East Hospital, Chiba, Japan
| | - M Kusaka
- Department of Urology, Fujita Health University, School of Medicine, Aichi, Japan
| | - H Sasaki
- Department of Urology, Fujita Health University, School of Medicine, Aichi, Japan
| | - T Asano
- Department of Surgery, National Hospital Organization, Chiba East Hospital, Chiba, Japan
| | - H Matsubara
- Department of Frontier Surgery, Chiba University, Graduate School of Medicine, Chiba, Japan
| | - K Hoshinaga
- Department of Urology, Fujita Health University, School of Medicine, Aichi, Japan
| |
Collapse
|
48
|
Miyatake C, Koizumi S, Narazaki H, Asano T, Osaka H, Kurosawa K, Takanashi JI, Fujino O. Clinical pictures in Pelizaeus-Merzbacher disease: a report of a case. J NIPPON MED SCH 2015; 82:74-5. [PMID: 25959197 DOI: 10.1272/jnms.82.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Chiharu Miyatake
- Department of Pediatrics, Nippon Medical School Chiba Hokusoh Hospital
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Endo Y, Kawai K, Asano T, Amano S, Asanuma Y, Sawada K, Onodera Y, Ueo N, Takahashi N, Sonoda Y, Kamei N, Irie T. 2-(Isopropylamino)thieno[3,2-d]pyrimidin-4(3H)-one derivatives as selective phosphodiesterase 7 inhibitors with potent in vivo efficacy. Bioorg Med Chem Lett 2015; 25:1910-4. [DOI: 10.1016/j.bmcl.2015.03.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/11/2015] [Accepted: 03/14/2015] [Indexed: 12/19/2022]
|
50
|
Nakata K, Sato N, Hirakawa K, Asakura T, Suzuki T, Zhu R, Asano T, Koike K, Ohno Y, Yokota H. Pattern recognition analysis of proton nuclear magnetic resonance spectra of extracts of intestinal epithelial cells under oxidative stress. J NIPPON MED SCH 2015; 81:236-47. [PMID: 25186577 DOI: 10.1272/jnms.81.236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Mesenteric ischemia-reperfusion induces gut mucosal damage. Intestinal mucosal wounds are repaired by epithelial restitution. Although many different molecular mechanisms have been shown to affect cell metabolism under oxidative conditions, these molecular mechanisms and metabolic phenotypes are not well understood. Nuclear magnetic resonance (NMR) spectroscopic data can be used to study metabolic phenotypes in biological systems. Pattern recognition with multivariate analysis is one chemometric technique. The purpose of this study was to visualize, using a chemometric technique to interpret NMR data, different degrees of oxidant injury in rat small intestine (IEC-6) cells exposed to H2O2. METHODS Oxidant stress was induced by H2O2 in IEC-6 cells. Cell restitution and viability were assessed at different H2O2 concentrations and time points. Cells were harvested for pattern recognition analysis of (1)H-NMR data. RESULTS Cell viability and restitution were significantly suppressed by H2O2 in a dose-dependent manner compared with control. Each class was clearly separated into clusters by partial least squares discriminant analysis, and class variance was greater than 90% from 2 factors. CONCLUSION Pattern recognition of NMR spectral data using a chemometric technique clearly visualized the differences of oxidant injury in IEC-6 cells under oxidant stress.
Collapse
Affiliation(s)
- Keiji Nakata
- Department of Emergency and Critical Care Medicine, Nippon Medical School
| | | | | | | | | | | | | | | | | | | |
Collapse
|