1
|
Matsuda K, Nakahara Y, Choirunnisa AR, Arima K, Wakimoto T. Phylogeny-guided Characterization of Bacterial Hydrazine Biosynthesis Mediated by Cupin/methionyl tRNA Synthetase-like Enzymes. Chembiochem 2024; 25:e202300838. [PMID: 38403952 DOI: 10.1002/cbic.202300838] [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: 12/12/2023] [Revised: 01/27/2024] [Accepted: 02/25/2024] [Indexed: 02/27/2024]
Abstract
Cupin/methionyl-tRNA synthetase (MetRS)-like didomain enzymes catalyze nitrogen-nitrogen (N-N) bond formation between Nω-hydroxylamines and amino acids to generate hydrazines, key biosynthetic intermediates of various natural products containing N-N bonds. While the combination of these two building blocks leads to the creation of diverse hydrazine products, the full extent of their structural diversity remains largely unknown. To explore this, we herein conducted phylogeny-guided genome-mining of related hydrazine biosynthetic pathways consisting of two enzymes: flavin-dependent Nω-hydroxylating monooxygenases (NMOs) that produce Nω-hydroxylamine precursors and cupin/MetRS-like enzymes that couple the Nω-hydroxylamines with amino acids via N-N bonds. A phylogenetic analysis identified the largely unexplored sequence spaces of these enzyme families. The biochemical characterization of NMOs demonstrated their capabilities to produce various Nω-hydroxylamines, including those previously not known as precursors of N-N bonds. Furthermore, the characterization of cupin/MetRS-like enzymes identified five new hydrazine products with novel combinations of building blocks, including one containing non-amino acid building blocks: 1,3-diaminopropane and putrescine. This study substantially expanded the variety of N-N bond forming pathways mediated by cupin/MetRS-like enzymes.
Collapse
Affiliation(s)
- Kenichi Matsuda
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Yuto Nakahara
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Atina Rizkiya Choirunnisa
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Kuga Arima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| | - Toshiyuki Wakimoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita 12, Nishi 6, Kita-ku, Sapporo, 060-0812, Japan
| |
Collapse
|
2
|
Asakura H, Nakahara Y, Nagai Y, Sakuraba Y. O-130 The influence of vaginal microbiota on frozen blastocyst implantation after transfer: a prospective study through next-generation 16S rRNA sequencing. Hum Reprod 2021. [DOI: 10.1093/humrep/deab126.055] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Study question
A prospective study to investigate the relationship between the composition of vaginal microbiota through next-generation sequencing and the efficacy of single frozen blastocyst transfer in the same cycle.
Summary answer
Dominant presence of lactobacillus and other lactate producing microbes in the upper vagina was highly correlated with implantation of transferred blastocyst in this pilot study.
What is known already
Next-generation sequencing of 16S rRNA detected microbes in the uterine cavity and recent studies indicated that dominant presence of Lactobacillus correlated highly with successful implantation of the transferred embryos. Aberrant vaginal microbiota has been known to cause poor obstetrical outcomes, however little is known for its effect on embryo implantation in assisted reproduction.
Study design, size, duration
A prospective study with 25 female subjects transferring a frozen blastocyst using autologous oocyte, over 14 months period in 2019-2020.
Participants/materials, setting, methods
25 female patients without tubal and uterine pathology and no history of multiple miscarriages and implantation failures were recruited with consent at a private ART clinic. Transdermal estrogen was used to prepare endometrium. Upper vaginal fluid was obtained in follicular phase of the the same cycle and analyzed through next-generation sequencing, but the result was reported after pregnancy confirmation. Single frozen blastocyst transfer and standard luteal phase support were performed. Institutional IRB approved the protocol.
Main results and the role of chance
The mean age was 36.2 y.o.(range 29-41 y.o.), and 14 gestational sacs (implantation rate 56%), and 3 miscarriage (21.4%) were observed. Next-generation sequencing for 16S rRNA revealed average 69.2% presence of Lactobacillus (0-100%) and average 78.0% (0.2-100%) lactate producing microbes (LPM: Lactobacillus, Bifidobacterium, Streptococcus, and Enterococcus) in the vaginal fluid. Using 90% as cut-off, implantation rates were 11/15 (73.3%) and 3/10 (30%) with Lactobacillus dominant and non-dominant, 12/16 (75%) and 2/9 (22.2%) with LPM dominant and non-dominant microbiota, respectively. The difference in each group were not statistically significant. The relative risks for pregnancy were 2.63 (95%CI 1.03-6.67, P=0.04) for Lactobacillus and 3.11 (95%CI 1.24-7.79, P=0.02) for LPM. As for ROC analysis for embryo implantation and dominant microbes, AUC and associated criterion were 0.62 and 90.7% (sensitivity 78.6%, specificity 72.7%) for Lactobacillus, 0.69 and 96.6% (sensitivity 85.7%, specificity 72.7%) for LPM, respectively. The difference of AUC was not significant (P=0.24).
Limitations, reasons for caution
Despite prospective nature of the study, small sample size limited the analytical power of the study. Aneuploidy screening was not performed to remove confounding factor.
Wider implications of the findings
Our pilot study revealed possible relationship between vaginal microbiota and embryo implantation. Dominance of Lactobacillus or other lactate producing microbes may be advantageous for successful ART. Sampling vaginal fluid for microbe analysis is less invasive than endometrial sampling and can obtain more abundant RNA with possible higher accuracy of analysis.
Trial registration number
not applicable
Collapse
Affiliation(s)
- H Asakura
- Ohgimachi Ladeis’ Clinic, Reproductive Medicine, Osaka, Japan
| | - Y Nakahara
- Ohgimachi Ladeis’ Clinic, Reproductive Medicine, Osaka, Japan
| | - Y Nagai
- Varinos- Inc., DNA Laboratory, Tokyo, Japan
| | - Y Sakuraba
- Varinos- Inc., DNA Laboratory, Tokyo, Japan
| |
Collapse
|
3
|
Nishida T, Nakahara Y. Mass formula dependence of calculated spallation reaction product distributions / Abhängigkeit berechneter Verteilungen von Spallationsprodukten von der benutzten Massenformel. KERNTECHNIK 2021. [DOI: 10.1515/kern-1990-550308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
4
|
Nishida T, Nakahara Y. Analysis of produced nuclei and emitted neutrons in nuclear spallation reactions / Analyse der Reaktionsprodukte und der emittierten Neutronen bei Spallationsreaktionen. KERNTECHNIK 2021. [DOI: 10.1515/kern-1987-500319] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
5
|
Okizaki A, Nakayama M, Nakajima K, Fujimoto O, Oshikiri S, Koike-Satake M, Nakahara Y. Noninvasive estimation of quantitative myocardial blood flow with Tc-99m MIBI by a compartment model analysis in rat. J Nucl Cardiol 2020; 27:1368-1374. [PMID: 29654445 DOI: 10.1007/s12350-018-1274-z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 03/29/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND We aimed to investigate the use of dynamic cardiac planar images to estimate myocardial blood flow (MBF) by a compartment model analysis using time-to-peak (TP) map and compared it by the microsphere technique in rat. Positron emission tomography is considered the gold standard method, but is not available everywhere. By contrast, although myocardial perfusion imaging (MPI) with single-photon tracers is more widely available, it may be difficult to obtain adequate region of interest (ROI) settings. We proposed using the TP map to set the ROI, and hypothesized that this method could facilitate the measurement of absolute MBF by MPI in rat. METHODS Twenty-one normal rats were studied. Dynamic planar images with Tc-99m MIBI were obtained, and input function and cardiac ROIs were set using the obtained TP map. MBF was estimated by a one-compartment model analysis with the Renkin-Crone model and by the microsphere technique. RESULTS The MBFs from these two methods were significantly correlated. A negative proportional bias was observed, but no significant difference was observed between the mean MBFs calculated with each method. CONCLUSIONS MBF estimation by a compartment model analysis using TP map could facilitate absolute MBF measurement in rats.
Collapse
Affiliation(s)
- Atsutaka Okizaki
- Department of Radiology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-higashi, Asahikawa, 078-8510, Japan.
| | - Michihiro Nakayama
- Department of Radiology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-higashi, Asahikawa, 078-8510, Japan
| | - Kaori Nakajima
- Department of Radiology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-higashi, Asahikawa, 078-8510, Japan
| | | | | | | | | |
Collapse
|
6
|
Le TD, Nakahara Y, Ueda M, Okumura K, Hirai J, Sato Y, Takemoto D, Tomimori N, Ono Y, Nakai M, Shibata H, Inoue YH. Sesamin suppresses aging phenotypes in adult muscular and nervous systems and intestines in a Drosophila senescence-accelerated model. Eur Rev Med Pharmacol Sci 2020; 23:1826-1839. [PMID: 30840309 DOI: 10.26355/eurrev_201902_17146] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Sesamin is a major lignan constituent of sesame and possesses various health-promoting effects. Previous studies have demonstrated that sesamin extends the lifespan of Drosophila and Caenorhabditis elegans and corrects oxidative damage-related tissue dysfunction in mammals. To understand its anti-aging effects, we aimed to determine whether sesamin restores tissue function hampered by oxidative damage and suppresses several aging-related phenotypes using Drosophila senescence-accelerated models. MATERIALS AND METHODS We elucidated the anti-aging effects of sesamin on several aging-related phenotypes in the muscle, brain and midgut using the senescence-accelerated models (Sod1n1 mutant and Sod1-depleted flies) by immunostaining experiments. We determined the expression levels of several anti-oxidative and DNA repair genes using quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). We also identified the metabolite of sesamin in Drosophila by LC-MS/MS. RESULTS We confirmed that sesamin (0.35 and 2 mg/ml) extended the lifespan of the fly models. As observed in mammals, it can be absorbed and metabolized by Drosophila adults. The sesamin feeding suppressed the age-dependent impairment of locomotor activity and inhibited the accumulation of reactive oxygen species (ROS) in their bodies. Sesamin delayed the age-dependent accumulation of damaged proteins in the muscle, partially suppressed the loss of dopaminergic neurons in adult brains displaying ROS accumulation, and suppressed the accumulation of DNA damage and hyperproliferation of intestinal stem cells. Four antioxidative genes and two DNA repair genes were simultaneously upregulated in sesamin-fed adults. CONCLUSIONS: These observations represent the first direct evidence of the anti-aging effects of sesamin at the individual level. We propose that sesamin exerts anti-aging effects in the muscles, brain and midgut by inducing antioxidative and DNA repair genes, resulting in extended lifespan in flies.
Collapse
Affiliation(s)
- T D Le
- Insect Biomedical Research Centre, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Yokoyama T, Yoshioka H, Fujimoto D, Demura Y, Hirano K, Kawai T, Kagami R, Ishida T, Tomii K, Akai M, Hirabayashi M, Nishimura T, Nakahara Y, Kim Y, Yoshimura K, Hirai T. Updated survival outcomes of the phase II study of low starting dose of afatinib as first-line treatment in patients with EGFR mutation-positive non-small cell lung cancer (KTORG1402). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz437.007] [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: 11/12/2022] Open
|
8
|
Kondo T, Nakahara Y, Usui R, Murakami S, Kato T, Saito H, Yamada K. EP1.01-72 Treatment Outcome of 2nd Generation EGFR-TKI for Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.2045] [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: 11/25/2022]
|
9
|
Otani S, Yamada K, Miyamoto S, Azuma K, Ishii H, Bessho A, Hosokawa S, Kunitoh H, Miyazaki K, Tanaka H, Miura S, Aono H, Nakahara Y, Kusaka K, Hosomi Y, Hamada A, Okamoto H. MA21.11 A Multicenter Phase II Study of Low-Dose Erlotinib in Frail Patients with EGFR Mutation-Positive, Non-Small Cell Lung Cancer: TORG1425. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.681] [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: 10/25/2022]
|
10
|
Ota T, Fukui T, Nakahara Y, Takeda T, Uchino J, Mouri T, Kudo K, Nakajima S, Suzumura T, Okabe T, Hayashi H, Miyatake N, Nakano Y, Terashima M, Hasegawa Y, Tsukuda H, Matsui K, Masuda N, Fukuoka M. P1.04-40 Serum Perforin Levels During the First Cycle of Anti-PD-1 Antibody Therapies in Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.943] [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: 11/28/2022]
|
11
|
Azuma K, Nakahara Y, Matsuo N, Ishii H, Tokito T, Murotani K, Hoshino T, Sasada T. P2.04-01 Changes of BCR Repertoire Are Predictive Biomarker for the Efficacy of Immune Checkpoint Inhibitor in NSCLC. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1507] [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: 11/29/2022]
|
12
|
Nakahara Y, Oizumi S, Mizugaki H, Fujita Y, Harada T, Takashina T, Ko R, Watanabe K, Hotta T, Minemura H, Saeki S, Yagishita S, Hamada A. Phase II trial of afatinib in elderly patients over 75 years of age with EGFR mutation positive NSCLC. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy425.027] [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: 11/15/2022] Open
|
13
|
Ota T, Takeda T, Fukui T, Nakahara Y, Kudo K, Okabe T, Hayashi H, Otani S, Hiyoshi Y, Yonesaka K, Sugiura T, Suzumura T, Terashima M, Nakano Y, Hasegawa Y, Tsukuda H, Matsui K, Masuda N, Fukuoka M. Serum biomarkers during the first cycle of anti-PD-1 antibody therapies in non-small cell lung cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy288.073] [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: 11/15/2022] Open
|
14
|
Hosokawa S, Otani S, Sasaki J, Fukui T, Nakahara Y, Bessho A, Fukamatsu N, Nakamura Y, Kasai T, Sugiyama T, Tokitho T, Seki N, Hamada A, Masuda N, Okamoto H. P3.01-37 Phase II Study of Amrubicin Plus Erlotinib in Previously Treated, Advanced Non-Small Cell Lung Cancer Patients with Wild-Type EGFR: TORG 1320. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1597] [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: 10/28/2022]
|
15
|
Nakahara Y, Yamasaki M, Miyazaki Y, Tanaka K, Makino T, Takahashi T, Kurokawa Y, Nakajima K, Takiguchi S, Mori M, Doki Y. Reflux after esophagectomy with gastric conduit reconstruction in the posterior mediastinum for esophageal cancer: original questionnaire and EORTC QLQ-C30 survey. Dis Esophagus 2018; 31:4956131. [PMID: 29617733 DOI: 10.1093/dote/doy001] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Indexed: 12/11/2022]
Abstract
Reflux following an esophagectomy with gastric conduit reconstruction in the posterior mediastinum is a clinically significant problem. In this study, we investigated the frequency and impact of reflux on the quality of life (QOL) among 158 patients who underwent an esophagectomy for esophageal cancer using an original questionnaire and the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Version 3.0 (EORTC QLQ-C30). Reflux frequency was assessed using the original questionnaire. The number of patients who complained of reflux every day, two or three times a week, once a week, or less than once a week was 16 (10.1%), 21 (13.3%), 26 (16.5%), and 60 (38.0%), respectively. Out of 35 patients (22.2%) reported no reflux symptoms. Patients were divided into two groups: those with reflux ≥ once/week (63 patients) and those with low frequency of symptoms (95 patients). Time elapsed following surgery was the only factor to influence reflux frequency. Reflux frequency decreased within two years of surgery; however, the frequency plateaued after more than two years. QOL was assessed using the EORTC QLQ-C30. The ≥ once/week reflux group had a significantly lower global health status score than the low-frequency reflux group (59.6 ± 24.2 vs. 70.8 ± 20.7; P = 0.007). In addition, the ≥ once/week reflux group had a significantly lower social functioning score than the low-frequency reflux group (81.6 ± 24.1 vs. 88.4 ± 19.8; P = 0.035). Regarding symptoms, the ≥ once/week reflux group had significantly higher scores for fatigue, nausea, and vomiting, dyspnea and insomnia compared to the low-frequency reflux group (fatigue: 42.4 ± 21.9 vs. 28.9 ± 18.4, P < 0.001; nausea and vomiting: 17.3 ± 17.1 vs. 4.9 ± 10.6, P < 0. 001; dyspnea: 29.2 ± 26.0 vs. 21.7 ± 26.8, P = 0.043; insomnia: 22.2 ± 31.1 vs. 10.5 ± 21.7, P = 0.015). Thus, reflux after an esophagectomy was associated with a lower QOL.
Collapse
Affiliation(s)
- Y Nakahara
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita.,Department of Surgery, Kinki Central Hospital, Itami, Japan
| | - M Yamasaki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - Y Miyazaki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - K Tanaka
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - T Makino
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - T Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - Y Kurokawa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - K Nakajima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - S Takiguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - M Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| | - Y Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita
| |
Collapse
|
16
|
Fujimoto D, Yokoyama T, Yoshioka H, Demura Y, Hirano K, Kawai T, Kagami R, Ishida T, Tomii K, Akai M, Hirabayashi M, Nishimura T, Nakahara Y, Kim Y, Yoshimura K, Hirai T. A phase II study of low-dose afatinib as first-line treatment in patients with EGFR mutation-positive non-small-cell lung cancer (KTORG1402). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
17
|
Ohyanagi F, Okuma Y, Goto Y, Sunami K, Nakahara Y, Kitazono S, Tambo Y, Yanagitani N, Kanda S, Horiike A, Horinouchi H, Fujiwara Y, Nokihara H, Yamamoto N, Nishio M, Ohe Y, Hosomi Y. MA 16.04 Phase II Trial of S-1 Treatment as Palliative-Intent Chemotherapy for Previously Treated Advanced Thymic Carcinoma. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.599] [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: 11/26/2022]
|
18
|
Fukui T, Nakahara Y, Otani S, Katagiri M, Mitsufuji H, Kubota M, Hiyoshi Y, Ishihara M, Kasajima M, Igawa S, Sasaki J. A prospective observational study of immune checkpoint inhibitor nivolumab treatment in patients with non-small cell lung cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671.030] [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: 11/13/2022] Open
|
19
|
Okuma Y, Goto Y, Ohyanagi F, Sunami K, Nakahara Y, Kitazono S, Tambo Y, Yanagitani N, Kanda S, Horinouchi H, Horiike A, Fujiwara Y, Nokihara H, Yamamoto N, Nishio M, Ohe Y, Hosomi Y. Phase II trial of S-1 treatment as palliative-intent chemotherapy for previously treated advanced thymic carcinoma. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx389.010] [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: 11/13/2022] Open
|
20
|
|
21
|
Nakahara Y, Gage FH, Tuszynski MH. Grafts of Fibroblasts Genetically Modified to Secrete Ngf, Bdnf, Nt-3, or Basic Fgf Elicit Differential Responses in the Adult Spinal Cord. Cell Transplant 2017; 5:191-204. [PMID: 8689031 DOI: 10.1177/096368979600500209] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Neuronal and axonal responses to neurotrophic factors in the developing spinal cord have been relatively well characterized, but little is known about adult spinal responses to neurotrophic factors. We genetically modified primary rat fibroblasts to produce either nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin-3 (NT-3), or basic fibroblast growth factor (bFGF), then grafted these neurotrophic factor-secreting cells into the central gray matter of the spinal cord in adult rats. Spinal cord lesions were not made prior to grafting. From 2 wk to 6 mo later, sensory neurites of dorsal root origin extensively penetrated NGF-, NT-3-, and bFGF-producing grafts, whereas BDNF-secreting grafts elicited no growth responses. Putative noradrenergic neurites also penetrated NGF-secreting cell grafts. Local motor and corticospinal motor axons did not penetrate any of the neurotrophic factor-secreting grafts. These results indicate that unlesioned or minimally lesioned adult spinal cord sensory and putative noradrenergic populations retain significant neurotrophic factor responsiveness, whereas motor neurites are comparatively resistant even to those neurotrophic factors to which they exhibit survival dependence during development. Grafts of genetically modified cells can be a useful tool for characterizing neurotrophic factor responsiveness in the adult spinal cord and designing strategies to promote axonal regeneration after injury.
Collapse
Affiliation(s)
- Y Nakahara
- Department of Neurosciences, University of California-San Diego, La Jolla 92093, USA
| | | | | |
Collapse
|
22
|
Asaoka T, Nakahara Y, Horikami K, Nishida T, Suzuki T, Taji Y, Miyasaka S, Hirota J. Application of Coarse-Mesh Rebalance Acceleration to Monte Carlo Eigenvalue Problems. NUCL SCI ENG 2017. [DOI: 10.13182/nse76-a26835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Asaoka
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - Y. Nakahara
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - K. Horikami
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - T. Nishida
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - T. Suzuki
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - Y. Taji
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - S. Miyasaka
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| | - J. Hirota
- Japan Atomic Energy Research Institute, Tokai, Ibaraki, Japan
| |
Collapse
|
23
|
Shinohara N, Kohno N, Nakahara Y, Tsujimoto K, Sakurai T, Mukaiyama T, Raman S. Validation of Minor Actinide Cross Sections by Studying Samples Irradiated for 492 Days at the Dounreay Prototype Fast Reactor—I: Radiochemical Analysis. NUCL SCI ENG 2017. [DOI: 10.13182/nse03-a2347] [Citation(s) in RCA: 7] [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: 11/12/2022]
Affiliation(s)
- N. Shinohara
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - N. Kohno
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - Y. Nakahara
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - K. Tsujimoto
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - T. Sakurai
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - T. Mukaiyama
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - S. Raman
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| |
Collapse
|
24
|
Tsujimoto K, Kohno N, Shinohara N, Sakurai T, Nakahara Y, Mukaiyama T, Raman S. Validation of Minor Actinide Cross Sections by Studying Samples Irradiated for 492 Days at the Dounreay Prototype Fast Reactor—II: Burnup Calculations. NUCL SCI ENG 2017. [DOI: 10.13182/nse03-a2348] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K. Tsujimoto
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - N. Kohno
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - N. Shinohara
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - T. Sakurai
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - Y. Nakahara
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - T. Mukaiyama
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-1195, Japan
| | - S. Raman
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| |
Collapse
|
25
|
Tamai T, Watanabe M, Kobayashi Y, Nakahara Y, Yajima S. Surface modification of PEN and PET substrates by plasma treatment and layer-by-layer assembly of polyelectrolyte multilayer thin films and their application in electroless deposition. RSC Adv 2017. [DOI: 10.1039/c7ra04880g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Surface modification of PEN and PET substrates by plasma-treatment and LbL assembly of polyelectrolyte multilayers and subsequent electroless nickel deposition.
Collapse
Affiliation(s)
- T. Tamai
- Morinomiya Center
- Osaka Research Institute of Industrial Science and Technology
- Osaka 536-8553
- Japan
| | - M. Watanabe
- Morinomiya Center
- Osaka Research Institute of Industrial Science and Technology
- Osaka 536-8553
- Japan
| | - Y. Kobayashi
- Morinomiya Center
- Osaka Research Institute of Industrial Science and Technology
- Osaka 536-8553
- Japan
| | - Y. Nakahara
- Faculty of Systems Engineering
- Wakayama University
- Wakayama 640-8510
- Japan
| | - S. Yajima
- Faculty of Systems Engineering
- Wakayama University
- Wakayama 640-8510
- Japan
| |
Collapse
|
26
|
Nakahara Y, Takagi Y, Nagamata M, Watanabe K, Takahashi S, Yomota M, Okuma Y, Hosomi Y, Okamura T, Masuda N. 437P Activity of S-1 for non-small cell lung cancer pretreated with pemetrexed. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv532.21] [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: 11/13/2022] Open
|
27
|
Sato A, Torii T, Nakahara Y, Iwahashi M, Itoh Y, Iramina K. The impact of rTMS over the dorsolateral prefrontal cortex on cognitive processing. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2013:1988-91. [PMID: 24110106 DOI: 10.1109/embc.2013.6609919] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The purpose of the present study was to use event-related potentials (ERP) to clarify the effect of magnetic stimulation on cognitive processing. A figure eight-shaped flat repetitive transcranial magnetic stimulation (rTMS) coil was used to stimulate either the region over the left or the right dorsolateral prefrontal cortex, which is considered to be the origin of the P300 component. Stimulus frequencies were 1.00, 0.75 and 0.50 Hz rTMS. The strength of the magnetic stimulation was set at 80% of the motor threshold for each participant. The auditory oddball task was used to elicit P300s before and shortly after rTMS, and comprised a sequence of sounds containing standard (1 kHz pure tone, 80% of trials) and deviant (2 kHz pure tone, 20% of trials) stimuli. We found that a 1.00 Hz rTMS pulse train over the left dorsolateral prefrontal cortex increased P300 latencies by 8.50 ms at Fz, 12.85 ms at Cz, and 11.25 ms at Pz. In contrast, neither 0.75 and 0.50 Hz rTMS pulse trains over the left dorsolateral prefrontal cortex nor 1.00, 0.75 and 0.50 Hz rTMS pulse trains over the right dorsolateral prefrontal cortex altered P300 latencies. These results indicate that rTMS frequency affects cognitive processing. Thus, we suggest that the effects of rTMS vary according to the activity of excitatory and inhibitory neurons in the cerebral cortex.
Collapse
|
28
|
Chen CJ, Bando K, Ashino H, Taguchi K, Shiraishi H, Shima K, Fujimoto O, Kitamura C, Matsushima S, Uchida K, Nakahara Y, Kasahara H, Minamizawa T, Jiang C, Zhang MR, Ono M, Tokunaga M, Suhara T, Higuchi M, Yamada K, Ji B. In vivo SPECT imaging of amyloid-β deposition with radioiodinated imidazo[1,2-a]pyridine derivative DRM106 in a mouse model of Alzheimer's disease. J Nucl Med 2014; 56:120-6. [PMID: 25476539 DOI: 10.2967/jnumed.114.146944] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [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: 11/16/2022] Open
Abstract
UNLABELLED Noninvasive determination of amyloid-β peptide (Aβ) deposition has important significance for early diagnosis and medical intervention for Alzheimer's disease (AD). In the present study, we investigated the availability of radiolabeled DRM106 ((123/125)I-DRM106 [6-iodo-2-[4-(1H-3-pyrazolyl)phenyl]imidazo[1,2-a]pyridine]), a compound with sufficient affinity for the synthesis of human Aβ fibrils and satisfactory metabolic stability, as a SPECT ligand in living brains. METHOD The sensitivity of (125)I-DRM106 for detecting Aβ deposition was compared with that of (125)I-IMPY (2-(4'-dimethylaminophenyl)-6-iodo-imidazo[1,2-a]pyridine), a well-known amyloid SPECT ligand, by ex vivo autoradiographic analyses in 18-mo-old amyloid precursor protein transgenic mice. To verify the sensitivity and quantitation of radiolabeled DRM106 for in vivo imaging, we compared the detectability of Aβ plaques with (123)I-DRM106 and a well-known amyloid PET agent, (11)C-labeled Pittsburgh compound B ((11)C-PiB), in 29-mo-old transgenic mice and age-matched nontransgenic littermates. Additionally, we compared the binding characteristics of (125)I-DRM106 with those of (11)C-PiB and (11)C-PBB3, which selectively bind to Aβ plaques and preferentially to tau aggregates, respectively, in postmortem AD brain sections. RESULTS Ex vivo autoradiographic analysis showed that measurement with (125)I-DRM106 has a higher sensitivity for detecting Aβ accumulation than with (125)I-IMPY in transgenic mice. SPECT imaging with (123)I-DRM106 also successfully detected Aβ deposition in living aged transgenic mice and showed strong correlation (R = 0.95, P < 0.01) in quantitative analysis for Aβ plaque detection by PET imaging with (11)C-PiB, implying that sensitivity and quantitation of SPECT imaging with (123)I-DRM106 are almost as good as (11)C-PiB PET for the detectability of Aβ deposition. Further, the addition of nonradiolabeled DRM106 fully blocked the binding of (125)I-DRM106 and (11)C-PiB, but not (11)C-PBB3, to AD brain sections, and (125)I-DRM106 showed a lower binding ratio of the diffuse plaque-rich lateral temporal cortex to the dense-cored/neuritic plaque-rich hippocampal CA1 area, compared with (11)C-PiB. CONCLUSION All of these data demonstrated the high potential of (123)I-DRM106 for amyloid imaging in preclinical and clinical application, and it might more preferentially detect dense-cored/neuritic amyloid deposition, which is expected to be closely associated with neuropathologic changes of AD.
Collapse
Affiliation(s)
- Chun-Jen Chen
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan Clinical Veterinary Science, The United Graduate School of Veterinary Science, Gifu University, Gifu, Japan; and
| | - Kazunori Bando
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | - Hiroki Ashino
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | - Kazumi Taguchi
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | | | - Keiji Shima
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | - Osuke Fujimoto
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | - Chiemi Kitamura
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | | | - Keisuke Uchida
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | - Yuto Nakahara
- Research Department, Fujifilm RI Pharma Co. LTD, Chiba, Japan
| | | | | | - Cheng Jiang
- School of Pharmacy, Fudan University, Shanghai, China
| | - Ming-Rong Zhang
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan
| | - Maiko Ono
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan
| | - Masaki Tokunaga
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan
| | - Tetsuya Suhara
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan
| | - Makoto Higuchi
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan
| | - Kazutaka Yamada
- Clinical Veterinary Science, The United Graduate School of Veterinary Science, Gifu University, Gifu, Japan; and
| | - Bin Ji
- Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan
| |
Collapse
|
29
|
Takagi Y, Nakahara Y, Hosomi Y, Kagei A, Yamamoto T, Yomota M, Okuma Y, Mikura S, Okamura T. Noninvasive Genotyping Using Digital Pcr Before and After Combination Therapy with Gefitinib and Pemetrexed (Pem) or S-1 for Non-Small Cell Lung Cancer (Nsclc) Resistant to Epidermal Growth Factor Receptor (Egfr) Tyrosine Kinase Inhibitors (Tki). Ann Oncol 2014. [DOI: 10.1093/annonc/mdu326.17] [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: 11/14/2022] Open
|
30
|
Inokuchi H, Yasunaga H, Nakahara Y, Horiguchi H, Ogata N, Fujitani J, Matsuda S, Fushimi K, Haga N. Effect of rehabilitation on mortality of patients with Guillain-Barre Syndrome: a propensity-matched analysis using nationwide database. Eur J Phys Rehabil Med 2014; 50:439-446. [PMID: 24651152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Rehabilitation for patients with Guillain-Barre Syndrome (GBS) is recommended as it improves the outcome of neurological deficits. Few studies focused on the effect of rehabilitation on mortality of the patients. AIM To investigate the effect of rehabilitation on hospital mortality of patients with GBS using the Japanese Diagnosis Procedure Combination (DPC) nationwide administrative claims database. DESIGN A retrospective observational cohort study. SETTING Hospitals adopting the Japanese DPC system. POPULATION Patients hospitalized with a diagnosis of GBS between July 2007 and October 2011. METHODS Data analyzed included sex, age, Barthel index at admission, use of ventilation, immune therapy, and rehabilitation during hospitalization, comorbidity, hospital volume, type of hospital, and in-hospital death. One-to-one propensity score-matching was used to compare hospital mortality rates within 30- and 90-days after admission in rehabilitation and non-rehabilitation groups. The adjusted odds ratios of rehabilitation to hospital mortality were also estimated. RESULTS A total of 3835 patients were identified and analyzed. Patients with advancing age, lower Barthel index at admission, comorbidities, ventilation, or immune therapy were more likely to receive rehabilitation during hospitalization. Propensity-matched analysis of 926 pairs showed that the rehabilitation group had lower hospital mortality rates within both 30- and 90-days than the non-rehabilitation group. The adjusted odds ratios of rehabilitation to hospital mortality within 30- and 90-days were 0.14 and 0.23, respectively. CONCLUSION After matching patients' background, rehabilitation was associated with lower hospital mortality of patients with GBS. CLINICAL REHABILITATION IMPACT Rehabilitation treatment is essential for patients with GBS to improve their survival.
Collapse
Affiliation(s)
- H Inokuchi
- Department of Rehabilitation Medicine Graduate School of Medicine, The University of Tokyo, Tokyo, Japan -
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ji B, Chen CJ, Bandou K, Ashino H, Shima K, Uchida K, Fujimoto O, Kitamura C, Nakahara Y, Shiraishi H, Matsushima S, Ono M, Zhang M, Tokunaga M, Minamihisamatsu T, Fujinaga M, Suhara T, Higuchi M, Yamada K. P1‐277: SPECT IMAGING FOR AMYLOID PLAQUES WITH A NOVEL RADIOIODINATED LIGAND IN AN ALZHEIMER'S DISEASE MODEL. Alzheimers Dement 2014. [DOI: 10.1016/j.jalz.2014.05.517] [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: 11/17/2022]
Affiliation(s)
- Bin Ji
- National Institute of Radiological SciencesChibaJapan
| | | | | | | | | | | | | | | | | | | | | | - Maiko Ono
- National Institute of Radiological ScienceChibaJapan
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Nakahara Y, Katagiri T, Ogata N, Haga N. ACVR1 (587T>C) mutation in a variant form of fibrodysplasia ossificans progressiva: second report. Am J Med Genet A 2013; 164A:220-4. [PMID: 24259422 DOI: 10.1002/ajmg.a.36219] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [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: 12/28/2012] [Accepted: 08/09/2013] [Indexed: 11/11/2022]
Abstract
Fibrodysplasia ossificans progressiva (FOP) is a rare, congenital disorder caused by heterozygous mutation of the bone morphogenetic protein type I receptor ACVR1. Various forms of atypical FOP have recently been identified, and a novel mutation, ACVR1 (587T>C), was reported in 2011. We report on the second patient worldwide with ACVR1 (587T>C) mutation. A 22-year-old Japanese male with no family history of heterotopic ossification did not show any malformation of the great toes and showed normal development from birth to the age of 17 years, when heterotopic ossification appeared in the lumbar area. The clinical symptoms were similar to those reported previously: the delayed onset with a slower and mild clinical course and little finger camptodactyly. Gene analysis revealed that the patient was heterozygous for ACVR1 (587T>C) mutation, the same one as reported in 2011, suggesting a correlation between the location of the mutation and the clinical symptoms. This second report of ACVR1 (587T>C) mutation worldwide is particularly meaningful in that it highlights the difference between clinical symptoms of the first reported patient with ACVR1 (587T>C) mutation and those of classic FOP.
Collapse
Affiliation(s)
- Y Nakahara
- Department of Rehabilitation Medicine, The University of Tokyo Hospital, Tokyo, Japan
| | | | | | | |
Collapse
|
33
|
Yomota M, Sekihara K, Nakahara Y, Okuma Y, Takagi Y, Hosomi Y, Shibuya M, Okamura T. Lung Cancer in Patients with Combined Pulmonary Fibrosis and Emphysema. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.64] [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: 11/13/2022] Open
|
34
|
Ebata T, Nakahara Y, Okuma Y, Yomota M, Takagi Y, Hosomi Y, Okamura T. Efficacy of Docetaxel for Non-Small-Cell Lung Cancer as Third-or-Later-Lines of Chemotherapy. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.113] [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: 11/14/2022] Open
|
35
|
Sekihara K, Hosomi Y, Nakahara Y, Yomota M, Okuma Y, Takagi Y, Shibuya M, Okamura T. Initial Chemotherapy for Asymptomatic Brain Metastasis of Non-Small Cell Lung Cancer. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.20] [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: 11/13/2022] Open
|
36
|
Asakura H, Nakahara Y, Nishio K, Araki Y, Salas-Huetos A, Blanco J, Anton E, Freour T, Com E, Barriere P, Masson D, Pineau C, Ferlin A, Patassini C, Garolla A, Bottacin A, Menegazzo M, Foresta C, Tanaka A, Nagayoshi M, Tanaka I. Session 68: The impact of genetics in andrology. Hum Reprod 2013. [DOI: 10.1093/humrep/det202] [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: 11/12/2022] Open
|
37
|
Bandara WMKRTW, Ikeda M, Satoh H, Sasakawa M, Nakahara Y, Takahashi M, Okabe S. Introduction of a degassing membrane technology into anaerobic wastewater treatment. Water Environ Res 2013; 85:387-390. [PMID: 23789567 DOI: 10.2175/106143013x13596524516707] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effectiveness of degasification using a degassing membrane to improve chemical oxygen demand (COD) removal efficiency was investigated using a bench-scale upflow anaerobic sludge blanket (UASB) reactor. Vacuum degasification was able to transfer dissolved gas in the bulk liquid of the UASB reactor inside the membrane. Such a process might provide thermodynamically favorable conditions for the degradation of organic compounds. The COD-removal efficiency improved from 83% during normal operation to 90% during the degassing operation.
Collapse
Affiliation(s)
- W M K R T W Bandara
- Division of Environmental Engineering, Graduate School of Engineering, Hokkaido University, North-13, West-8, Sapporo 060-8628, Japan
| | | | | | | | | | | | | |
Collapse
|
38
|
Nakahara Y, Hosomi Y, Akahane M, Ookuma Y, Takagi Y, Iguchi M, Okamura T, Shibuya M, Karasawa K. Retrospective Study of Prophylactic Cranial Irradiation in Small-Cell Lung Cancer: Neurocognitive Analysis. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32438-8] [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: 11/24/2022] Open
|
39
|
Takagi Y, Toriihara A, Hosomi Y, Nakahara Y, Akahane M, Okuma Y, Iguchi M, Okamura T, Shibuya M. Does Eligibility for Bevacizumab (BV) Lead to Selection Bias? Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33814-x] [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: 10/25/2022] Open
|
40
|
Okuma Y, Hosomi Y, Nakahara Y, Yomoda M, Takagi Y, Iguchi M, Shibuya M, Okamura T. Prognostic Factor for Survival in Patients with Advanced Thymic Carcinoma. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)34082-5] [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: 11/25/2022] Open
|
41
|
Karakoula K, Bigner DD, Keir S, Thomas DG, Darling J, Warr T, Al-Halabi H, Albrecht S, Guiot MC, Kelkner A, Sahebjam S, Kavan P, Freeman CR, Muanza T, Jabado N, Bielen A, Perryman L, Box G, Popov S, Jeay S, Hofmann F, Hargrave D, Eccles S, Jones C, Dubuc AM, Mack S, Nakahara Y, Garzia L, Northcott PA, Kongkham P, Baylin S, Watkins N, Taylor MD, Paugh BS, Qu C, Zhang J, Geyer JR, Chi S, da Silva NS, Baker J, Gajjar A, Ellison DW, Broniscer A, Baker SJ, Mainwaring LA, Taylor M, Dupuy A, Kenney AM, Williams SC, Zagzag D, Chiriboga L, Becher OC, von Deimling A, Allen JC, Karajannis MA, Stearns D, von Buren AO, Donson A, Foreman N, Eberhart C, Taylor P, Kang N, Das CM, Rajaram V, Aguilera DG, Goldman S, Fangusaro J, Gopalakrishnan V, Das CM, Taylor P, Su X, Kommagani R, Aguilera DG, Wolff JE, Kadakia MP, Flores ER, Gopalakrishnan V. Pediatrics Laboratory Research. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s12] [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: 11/14/2022] Open
|
42
|
Kawashima M, Noguchi T, Takase Y, Nakahara Y, Matsushima T. Decrease in leptomeningeal ivy sign on fluid-attenuated inversion recovery images after cerebral revascularization in patients with Moyamoya disease. AJNR Am J Neuroradiol 2010; 31:1713-8. [PMID: 20466798 DOI: 10.3174/ajnr.a2124] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The "ivy" sign that is identified on FLAIR images in patients with Moyamoya disease is considered to be leptomeningeal collaterals. The aim of our study was to evaluate the correlation between postoperative decrease in ivy sign and cerebral hemodynamic status in the bypass-established hemisphere. MATERIALS AND METHODS Twenty-two patients with Moyamoya disease were enrolled. Postoperative changes in the ivy sign on FLAIR images were examined in each patient after bypass surgery. The correlation between postoperative changes in the ivy sign and hemodynamic status was examined in 10 patients by using SPECT. RESULTS Of the 22 preoperative ivy-positive patients, 21 showed decreased ivy signs on the operative side. Average intervals between the operation day and the date when the decreased or vanished ivy sign was first recognized were 157.6 days in patients who underwent direct bypass and 212.2 days in patients who underwent indirect bypass. A postoperative decrease in ivy signs was found to be significantly correlated with an improved hemodynamic status of the surgically treated hemisphere, resulting in a postoperative increase in regional vascular reserve and a decreased proportion of the misery perfusion area (P < .01). CONCLUSIONS Postoperative changes in the ivy sign can be used as a marker for identifying improved hemodynamics and also for testing the effectiveness of cerebral revascularization.
Collapse
Affiliation(s)
- M Kawashima
- Department of Neurosurgery, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, Japan.
| | | | | | | | | |
Collapse
|
43
|
Nakahara Y, Shintani S, Mihara M, Hino S, Hamakawa H. Detection of p16 promoter methylation in the serum of oral cancer patients. Int J Oral Maxillofac Surg 2005; 35:362-5. [PMID: 16298513 DOI: 10.1016/j.ijom.2005.08.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2004] [Revised: 02/12/2005] [Accepted: 08/25/2005] [Indexed: 11/28/2022]
Abstract
P16 promoter methylation occurs frequently in oral squamous cell carcinoma (OSCC). For the early detection of tumour-related aberrant DNA, we examined p16 methylation using the methylation-specific polymerase chain reaction (MSP) in tumour and serum samples of 17 OSCC patients. Aberrant p16 methylation was detected in 11 (64.7%) cases of primary OSCC. Of these 11 patients, 6 (54.5%) showed the same alteration in their serum. No methylation was found in control groups. Interestingly, DNA was detected in the serum of 3 out of 4 patients with recurrence. These results suggest that the MSP may be a sensitive and useful method for detecting recurrent OSCC.
Collapse
Affiliation(s)
- Y Nakahara
- Department of Oral and Maxillofacial Surgery, Ehime University School of Medicine, Ehime, Japan
| | | | | | | | | |
Collapse
|
44
|
Reza AMS, Kanamori Y, Shinoda T, Shimura S, Mita K, Nakahara Y, Kiuchi M, Kamimura M. Hormonal control of a metamorphosis-specific transcriptional factor Broad-Complex in silkworm. Comp Biochem Physiol B Biochem Mol Biol 2005; 139:753-61. [PMID: 15581808 DOI: 10.1016/j.cbpc.2004.09.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Revised: 09/13/2004] [Accepted: 09/14/2004] [Indexed: 10/26/2022]
Abstract
Insect metamorphosis is induced by the steroid 20-hydroxyecdysone (20E) in the absence of sesquiterpenoid juvenile hormone (JH). In Drosophila melanogaster, the Broad-Complex (BR-C) transcriptional factor plays critical roles during metamorphosis. We isolated cDNAs encoding BR-C in the silkworm Bombyx mori and examined their mRNA expression. cDNAs for three BR-C isoforms with zinc finger pairs (Z1, Z2 and Z4) and four isoforms lacking them were cloned. Their mRNAs were expressed in multiple tissues at the larval-pupal metamorphosis. In the anterior silk gland, BR-C mRNAs were expressed at the end of the last larval instar but not expressed during the penultimate instar. 20E administration induced BR-C mRNA expression and JH suppressed 20E-induced BR-C expression in this tissue both in vivo and in vitro. Thus, BR-C mRNAs are inducible by 20E only in the absence of JH, a finding that explains their metamorphosis-specific expression.
Collapse
Affiliation(s)
- A M S Reza
- Developmental Biology Department, National Institute of Agrobiological Sciences, 1-2, Owashi, Tsukuba, Ibaraki 305-8634, Japan
| | | | | | | | | | | | | | | |
Collapse
|
45
|
Kitagawa J, Omasu F, Nakahara Y. Effect of daily walking steps on ultrasound parameters of the calcaneus in elderly Japanese women. Osteoporos Int 2003; 14:219-24. [PMID: 12730771 DOI: 10.1007/s00198-002-1339-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2002] [Accepted: 09/25/2002] [Indexed: 11/30/2022]
Abstract
In this cross-sectional study, we investigated the effect of daily walking steps on ultrasound parameters of the calcaneus in elderly Japanese women. The subjects were 143 community-dwelling elderly women aged 61-87 years (mean age 71.4+/-5.5 years). The speed of sound (SOS), broadband ultrasound attenuation (BUA) and the stiffness index (Stiffness) of the calcaneus were measured. Walking steps were recorded using a pedometer for 7 consecutive days as an outcome measure of physical activity. In univariate analyses, steps/day significantly decreased with aging. SOS, BUA and Stiffness showed negative correlations with age and positive correlations with weight. Linear relationships were not seen between any of the ultrasound parameters and daily walking steps. Then, the ultrasound parameters were adjusted for age and/or weight using multiple regression models, and the relationships between the adjusted ultrasound measurements and walking steps were examined using quadratic regression models. Walking activity up to approximately 12,000 steps/day was positively associated with the adjusted ultrasound measurements, above which additional walking steps had no positive effect. We conclude that daily walking steps may be suitable for evaluating the relationship between ultrasound parameters and physical activity in elderly women, but further research is needed to confirm the effect of daily walking steps on the rate of bone loss.
Collapse
Affiliation(s)
- J Kitagawa
- Department of Human System Science, Graduate School of Decision Science and Technology, Tokyo Institute of Technology, 2-12-1 Ohokayama, Tokyo, Japan.
| | | | | |
Collapse
|
46
|
|
47
|
|
48
|
Saisho K, Scott KS, Morimoto S, Nakahara Y. Hair analysis for pharmaceutical drugs. II. Effective extraction and determination of sildenafil (Viagra) and its N-desmethyl metabolite in rat and human hair by GC-MS. Biol Pharm Bull 2001; 24:1384-8. [PMID: 11767107 DOI: 10.1248/bpb.24.1384] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In order to study the incorporation of sildenafil (SDF) and its N-demethylated metabolite (norSDF) into hair, animal model experiments were carried out. After shaving the back hair, SDF was dosed to two sets of three male dark-agouti pigmented rats (5 weeks old) per each group at 25 mg/kg once a day for 5 successive days with intraperitoneal (i.p.) (set1) and oral administration (set2). The regrown back hair was collected 14 d after the first administration. Three typical extraction methods, using methanol-5 M hydrochloric acid, methanol-trifluoroacetic acid and 1 M sodium hydroxide, were evaluated using the rat hair samples containing SDF and norSDF. Methanol-5 M hydrochloric acid was the best extraction method in terms of high efficiency and reproducibility. The extract was purified using Bond Elut Certify columns and was derivatized with trimethylsilylimidazole: N,O-bis(trimethylsilyltrifluoroacetamide): trimethylchlorosilane (3: 3: 2) at 90 degrees C for 30 min. The trimethylsilylated products were analyzed by GC-MS using selected ion monitoring. SDF and norSDF were simultaneously detected in the rat hair. The hair concentrations were 4.9-6.3 (av. 5.8) ng/mg and 15.6-20.3 (av. 17.6) ng/mg for SDF and norSDF, respectively, with i.p. administration, and 2.6-4.1 (av. 3.6) ng/mg and 8.1-10.4 (av. 9.1) ng/mg with oral administration. The hair concentrations of norSDF were about three times higher than those of SDF, and the ratios of both compounds showed no significant difference between i.p. and oral administrations. This method was applied to the scalp hair of two patients who orally took SDF at regular intervals for the treatment of penile erectile dysfunction. The hair concentrations of SDF and norSDF in the two patients were 19.8 and 55.9 ng/mg, and 1.7 and 5.6 ng/mg, respectively.
Collapse
Affiliation(s)
- K Saisho
- National Institute of Health Sciences, Tokyo, Japan.
| | | | | | | |
Collapse
|
49
|
Sasagawa H, Nakahara Y, Kiuchi M. An ENF peptide, Bombyx mori paralytic peptide, induces cell proliferation and morphological changes in Bombyx cell lines. In Vitro Cell Dev Biol Anim 2001; 37:638-40. [PMID: 11776967 DOI: 10.1290/1071-2690(2001)037<0638:aepbmp>2.0.co;2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
50
|
Nakahara Y, Hayashi S, Fukuno Y, Kawashima M, Yatsunami J. Increased interleukin-5 levels in bronchoalveolar lavage fluid is a major factor for eosinophil accumulation in acute eosinophilic pneumonia. Respiration 2001; 68:389-95. [PMID: 11464086 DOI: 10.1159/000050532] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Increased interleukin-5 (IL-5) levels have been reported in bronchoalveolar lavage fluid (BALF) from patients with acute eosinophilic pneumonia (AEP); however, it still remains to be determined whether IL-5 is responsible for the eosinophil accumulation in the lung. OBJECTIVE We examined the effect of antibodies against cytokines on eosinophil chemotaxis induced by BALF from AEP patients to identify factors responsible for eosinophil accumulation. METHODS We measured a series of specific cytokines, including IL-3, IL-4, IL-5, IL-6, IL-8, GM-CSF, RANTES, MCP-1, MIP-1alpha and eotaxin, in the BALF from 4 patients with AEP. BALF from 4 patients with chronic eosinophilic pneumonia (CEP) and 13 patients with non-eosinophilic interstitial lung diseases (ILD) were examined as controls. The eosinophil chemotactic activity in the BALF was examined using tissue culture insert furnished with a polycarbonate membrane. RESULTS The total protein content in BALF from patients with AEP was extremely elevated. Even after standardization with protein concentration, IL-5 levels in AEP patients were significantly higher than those in CEP and ILD. IL-3 and chemokines were rather lower in the AEP group than in the CEP and ILD groups. In AEP BALF, anti-IL-5 neutralizing antibody significantly inhibited eosinophil chemotaxis. Antibodies against IL-3, GM-CSF, and IL-8 did not affect the eosinophil migration. CONCLUSION These findings suggest that locally produced IL-5 plays an important role in eosinophil accumulation of AEP.
Collapse
Affiliation(s)
- Y Nakahara
- Division of Pulmonary Diseases, Department of Internal Medicine, Saga Medical School, Saga, Japan
| | | | | | | | | |
Collapse
|