5,724 results on '"Ohtsu, A"'
Search Results
2. A method of “Noninjecting Resection using Bipolar Soft coagulation mode; NIRBS” for superficial non-ampullary duodenal epithelial tumor: a pilot study
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Tokuhara, Mitsuo, Sano, Yasushi, Watanabe, Yoshifumi, Nakata, Hidetoshi, Nakahira, Hiroko, Furukawa, Shingo, Ohtsu, Takuya, Nakamura, Naohiro, Ito, Takashi, Torii, Ikuko, Yamashina, Takeshi, Shimatani, Masaaki, and Naganuma, Makoto
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- 2024
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3. Geographic and economic influences on benralizumab prescribing for severe asthma in Japan
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Kobayashi, Nobuaki, Matsumoto, Hiromi, Somekawa, Kohei, Kaneko, Ayami, Fukuda, Nobuhiko, Muraoka, Suguru, Ohtsu, Yukiko, Hirata, Momo, Nagasawa, Ryo, Kubo, Sousuke, Murohashi, Kota, Fujii, Hiroaki, Aoki, Ayako, Watanabe, Keisuke, Horita, Nobuyuki, Hara, Yu, and Kaneko, Takeshi
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- 2024
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4. Temporal and fertilizer-dependent dynamics of soil bacterial communities in buckwheat fields under long-term management
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Morigasaki, Susumu, Matsui, Motomu, Ohtsu, Iwao, Doi, Yuki, Kawano, Yusuke, Nakai, Ryosuke, Iwasaki, Wataru, Hayashi, Hisayoshi, and Takaya, Naoki
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- 2024
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5. Atomic-resolution structure analysis inside an adaptable porous framework
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Wada, Yuki, Usov, Pavel M., Chan, Bun, Mukaida, Makoto, Ohmori, Ken, Ando, Yoshio, Fuwa, Haruhiko, Ohtsu, Hiroyoshi, and Kawano, Masaki
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- 2024
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6. In laying hens, chronic heat stress-induced renal fibrosis is potentially promoted by indoxyl sulfate
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Fumika Nanto-Hara and Haruhiko Ohtsu
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Laying hens ,Fibrosis ,Heat stress ,Indoxyl sulfate ,Kidney ,Uremic toxins ,Medicine ,Science - Abstract
Abstract Indoxyl sulfate (IS), a uremic toxin, is a harmful factor that damages kidneys. Chronic heat stress in laying hens causes renal injury; however, whether IS accumulation is involved in this injury remains unknown. We selected 20 Boris brown laying hens (27 weeks old) and randomly assigned them to two groups (n = 10), one group was exposed to chronic heat stress (32 °C for 4 weeks), whereas the other was maintained at 24 °C. Chronic heat exposure significantly increased plasma and renal IS concentrations (P
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- 2024
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7. A method of 'Noninjecting Resection using Bipolar Soft coagulation mode; NIRBS' for superficial non-ampullary duodenal epithelial tumor: a pilot study
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Mitsuo Tokuhara, Yasushi Sano, Yoshifumi Watanabe, Hidetoshi Nakata, Hiroko Nakahira, Shingo Furukawa, Takuya Ohtsu, Naohiro Nakamura, Takashi Ito, Ikuko Torii, Takeshi Yamashina, Masaaki Shimatani, and Makoto Naganuma
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Bipolar snare ,Noninjecting ,Soft coagulation mode ,Superficial nonampullary duodenal epithelial tumor ,SNADET ,Duodenal lesion ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Abstract Background Complete endoscopic resection of superficial non-ampullary duodenal epithelial tumors (SNADETs) is technically difficult, especially with an extremely high risk of adverse event (AE), although various endoscopic resection methods including endoscopic mucosal resection (EMR), underwater EMR (UEMR), and endoscopic submucosal dissection (ESD) have been tried for SNADETs. Accordingly, a novel simple resection method that can completely resect tumors with a low risk of AEs should be developed. Aims A resection method of Noninjecting Resection using Bipolar Soft coagulation mode (NIRBS) which has been reported to be effective and safe for colorectal lesions is adapted for SNADETs. In this study we evaluated its effectiveness, safety, and simplicity for SNADETs measuring ≤ 20 mm. Results This study included 13 patients with resected lesions with a mean size of 7.8 (range: 3–15) mm. The pathological distributions of the lesions were as follows: adenomas, 77% (n = 10) and benign and non-adenomatous lesions, 23% (n = 3). The en bloc and R0 resection rate was 100% (n = 13). The median procedure duration was 68 s (32–105). None of the patients presented with major AEs including bleeding and perforation. Conclusions Large studies such as prospective, randomized, and controlled trials should be conducted for the purpose of validating effectiveness, safety, and simplicity of the NIRBS for SNADETs measuring ≤ 20 mm suggested in this study.
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- 2024
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8. Internet of things‐based approach for glycemic control in people with type 2 diabetes: A randomized controlled trial
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Ryotaro Bouchi, Kazuo Izumi, Naoki Ishizuka, Yukari Uemura, Hiroshi Ohtsu, Kengo Miyo, Shigeho Tanaka, Noriko Satoh‐Asahara, Kazuo Hara, Masato Odawara, Yoshiki Kusunoki, Hidenori Koyama, Takeshi Onoue, Hiroshi Arima, Kazuyo Tsushita, Hirotaka Watada, Takashi Kadowaki, and Kohjiro Ueki
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Behavioral change ,Internet of things ,Type 2 diabetes ,Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
ABSTRACT Aims The utilization of long‐term effect of internet of things (IoT) on glycemic control is controversial. This trial aimed to examine the effect of an IoT‐based approach for type 2 diabetes. Materials and Methods This randomized controlled trial enrolled 1,159 adults aged 20–74 years with type 2 diabetes with a HbA1c of 6.0–8.9% (42–74 mmol/mol), who were using a smartphone on a daily basis were randomly assigned to either the IoT‐based approach group (ITG) or the control group (CTG). The ITG were supervised to utilize an IoT automated system that demonstrates a summary of lifelogging data (weight, blood pressure, and physical activities) and provides feedback messages that promote behavioral changes in both diet and exercise. The primary end point was a HbA1c change over 52 weeks. Results Among the patients, 581 were assigned to the ITG and 578 were in the CTG. The changes in HbA1c from baseline to the final measurement at 52 weeks [mean (standard deviation)] were −0.000 (0.6225)% in ITG and − 0.006 (0.6449)% in CTG, respectively (P = 0.8766). In the per protocol set, including ITG using the IoT system almost daily and CTG, excluding those using the application almost daily, the difference in HbA1c from baseline to 52 weeks were −0.098 (0.579)% and 0.027 (0.571)%, respectively (P = 0.0201). We observed no significant difference in the adverse event profile between the groups. Conclusions The IoT‐based approach did not reduce HbA1c in patients with type 2 diabetes. IoT‐based intervention using data on the daily glycemic control and HbA1c level may be required to improve glycemic control.
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- 2024
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9. Geographic and economic influences on benralizumab prescribing for severe asthma in Japan
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Nobuaki Kobayashi, Hiromi Matsumoto, Kohei Somekawa, Ayami Kaneko, Nobuhiko Fukuda, Suguru Muraoka, Yukiko Ohtsu, Momo Hirata, Ryo Nagasawa, Sousuke Kubo, Kota Murohashi, Hiroaki Fujii, Ayako Aoki, Keisuke Watanabe, Nobuyuki Horita, Yu Hara, and Takeshi Kaneko
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Severe asthma ,Benralizumab ,Access to care ,Healthcare disparities ,Socioeconomic factors ,Medicine ,Science - Abstract
Abstract Benralizumab, a monoclonal antibody targeting IL-5 receptors, reduces exacerbations and oral corticosteroid requirements for severe, uncontrolled eosinophilic asthma. In Japan, geographic disparities in asthma outcomes suggest differential prescribing and access. This study aimed to quantify regional prescribing variations for benralizumab nationwide. Using Japan’s National Database (NDB) of insurance claims (2009–2019), benralizumab standardized claim ratios (SCRs) were calculated for 47 prefectures. Correlations between SCRs and other biologics’ SCRs, economic variables like average income, and physician densities were evaluated through univariate analysis and multivariate regressions. Income-related barriers to optimal prescribing were examined. Wide variation emerged in benralizumab SCRs, from 40.1 to 184.2 across prefectures. SCRs strongly correlated with omalizumab (r = 0.61, p
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- 2024
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10. Cancer registry as external control data for regulatory submission in Japan
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Bando, H., Okita, N., Sakamoto, Y., Sokuoka, H., Nakamura, Y., Hashimoto, T., Misumi, T., Takeda, Y., Aoyagi, Y., Mizuguchi, K., Okuma, H.S., Fuse, N., Yonemori, K., Nakamura, K., Yamamoto, N., Yoshino, T., and Ohtsu, A.
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- 2024
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11. Impact of adjuvant trastuzumab therapy and its discontinuation on cardiac function and mortality in patients with early-stage breast cancer: An analysis based on the Japanese Receipt Claim Database
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Miyazato, Keiko, Ohtsu, Hiroshi, Shimomura, Akihiko, Yonemoto, Naohiro, Shimizu, Chikako, Sase, Kazuhiro, and Ueda, Shinichiro
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- 2025
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12. Temporal and fertilizer-dependent dynamics of soil bacterial communities in buckwheat fields under long-term management
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Susumu Morigasaki, Motomu Matsui, Iwao Ohtsu, Yuki Doi, Yusuke Kawano, Ryosuke Nakai, Wataru Iwasaki, Hisayoshi Hayashi, and Naoki Takaya
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Medicine ,Science - Abstract
Abstract This study integrated bacterial community and soil chemicals to characterize the soil ecosystem in an open upland field managed by six controlled fertilizer programs using the minimum amount of pesticides. Amplicon sequencing the 16S rRNA gene revealed that inorganic nitrogen fertilizer and compost altered the diversity and structure of the soil bacterial community throughout buckwheat (Fagopyrum esculentum Moench ‘Hitachiakisoba’) cultivation. The bacterial community comprised three clusters that contained bacteria that are prevalent in soils fertilized with nitrogen (cluster 1, 340 taxa), without nitrogen and compost (cluster 2, 234 taxa), and with compost-fertilized (cluster 3, 296 taxa). Cluster 2 contained more taxa in Actinobacteriota and less in Acidobacteriota, and cluster 3 contained more taxa in Gemmatimonadota compared with the other clusters. The most frequent taxa in cluster 1 were within the Chloroflexi phylum. The bacterial community structure correlated with soil chemical properties including pH, total organic carbon, SO4 2−, soluble Ca2+. A co-occurrence network of bacterial taxa and chemicals identified key bacterial groups comprising the center of a community network that determined topology and dynamics of the network. Temporal dynamics of the bacterial community structure indicated that Burkholderiales were associated with buckwheat ripening, indicating plant-bacteria interaction in the ecosystem.
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- 2024
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13. Assaying Effector Cell-to-Cell Mobility in Plant Tissues Identifies Hypermobility and Indirect Manipulation of Plasmodesmata
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Mina Ohtsu, Joanna Jennings, Matthew Johnston, Andrew Breakspear, Xiaokun Liu, Kara Stark, Richard J. Morris, Jeroen de Keijzer, and Christine Faulkner
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fungal effectors ,fungus–plant interactions ,microscopy and imaging ,plasmodesmata ,Microbiology ,QR1-502 ,Botany ,QK1-989 - Abstract
In plants, plasmodesmata establish cytoplasmic continuity between cells to allow for communication and resource exchange across the cell wall. While plant pathogens use plasmodesmata as a pathway for both molecular and physical invasion, the benefits of molecular invasion (cell-to-cell movement of pathogen effectors) are poorly understood. To establish a methodology for identification and characterization of the cell-to-cell mobility of effectors, we performed a quantitative live imaging-based screen of candidate effectors of the fungal pathogen Colletotrichum higginsianum. We predicted C. higginsianum effectors by their expression profiles, the presence of a secretion signal, and their predicted and in planta localization when fused to green fluorescent protein. We assayed for cell-to-cell mobility of nucleocytosolic effectors and identified 14 that are cell-to-cell mobile. We identified that three of these effectors are “hypermobile,” showing cell-to-cell mobility greater than expected for a protein of that size. To explore the mechanism of hypermobility, we chose two hypermobile effectors and measured their impact on plasmodesmata function and found that even though they show no direct association with plasmodesmata, each increases the transport capacity of plasmodesmata. Thus, our methods for quantitative analysis of cell-to-cell mobility of candidate microbe-derived effectors, or any suite of host proteins, can identify cell-to-cell hypermobility and offer greater understanding of how proteins affect plasmodesmal function and intercellular connectivity. [Graphic: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
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- 2024
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14. Autologous concentrated bone marrow injection for precollapse osteonecrosis of the femoral head concurrent with contralateral total hip arthroplasty: protocol for a clinical trial
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Muneaki Ishijima, Ken Yamaji, Naoto Tamura, Naotake Yanagisawa, Hiroshi Ohtsu, Takuma Yamasaki, Yasuhiro Homma, Ken Tashiro, Yoshiki Okada, Yuichi Shirogane, Taiji Watari, Koju Hayashi, Tomonori Baba, Kazufumi Nagata, Naho Fujiwara, and Jun Ando
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Medicine - Abstract
Introduction The femoral head contralateral to the collapsed femoral head requiring total hip arthroplasty (THA) often manifests in the precollapse stage of osteonecrosis of the femoral head (ONFH). It is not yet demonstrated how autologous concentrated bone marrow injection may prevent collapse of the femoral head concurrent with contralateral THA. The primary objective is to evaluate the efficacy of autologous concentrated bone marrow injection for the contralateral, non-collapsed, femoral head in patients with bilateral ONFH, with the ipsilateral collapsed femoral head undergoing THA.Methods and analysis This is a multicentre, prospective, non-randomised, historical-data controlled study. We will recruit patients with ONFH who are scheduled for THA and possess a non-collapsed contralateral femoral head. Autologous bone marrow will be collected using a point-of-care device. After concentration, the bone marrow will be injected into the non-collapsed femoral head following the completion of THA in the contralateral hip. The primary outcome is the percentage of femoral head collapse evaluated by an independent data monitoring committee using plain X-rays in two directions 2 years after autologous concentrated bone marrow injection. Postinjection safety, adverse events, pain and hip function will also be assessed. The patients will be evaluated preoperatively, and at 6 months, 1 year and 2 years postoperatively.Ethics and dissemination This protocol has been approved by the Certified Committee for Regenerative Medicine of Tokyo Medical and Dental University and Japan’s Ministry of Healthy, Labour and Welfare and will be performed as a class III regenerative medicine protocol, in accordance with Japan’s Act on the Safety of Regenerative Medicine. The results of this study will be submitted to a peer-review journal for publication. The results of this study are expected to provide evidence to support the inclusion of autologous concentrated bone marrow injections in the non-collapsed femoral head in Japan’s national insurance coverage.Trial registration number jRCTc032200229.
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- 2024
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15. Atomic-resolution structure analysis inside an adaptable porous framework
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Yuki Wada, Pavel M. Usov, Bun Chan, Makoto Mukaida, Ken Ohmori, Yoshio Ando, Haruhiko Fuwa, Hiroyoshi Ohtsu, and Masaki Kawano
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Science - Abstract
Abstract We introduce a versatile metal-organic framework (MOF) for encapsulation and immobilization of various guests using highly ordered internal water network. The unique water-mediated entrapment mechanism is applied for structural elucidation of 14 bioactive compounds, including 3 natural product intermediates whose 3D structures are clarified. The single-crystal X-ray diffraction analysis reveals that incorporated guests are surrounded by hydrogen-bonded water networks inside the pores, which uniquely adapt to each molecule, providing clearly defined crystallographic sites. The calculations of host-solvent-guest structures show that the guests are primarily interacting with the MOF through weak dispersion forces. In contrast, the coordination and hydrogen bonds contribute less to the total stabilization energy, however, they provide highly directional point interactions, which help align the guests inside the pore.
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- 2024
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16. Insights into Genetic and Physiological Characteristics of Clover Rhizobia in Afghanistan Soils
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Safiullah Habibi, Michiko Yasuda, Shafiqullah Aryan, Tadashi Yokoyama, Kalimullah Saighani, and Naoko Ohkama-Ohtsu
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Afghanistan ,nifD ,rhizobia ,clover ,16S rRNA ,Microbiology ,QR1-502 - Abstract
Livestock production in Afghanistan highly relies on grazing and clover feed, which is a key component of pastures and forage crops. This study elucidated the genetic diversity of clover-nodulating rhizobia in different ecological regions and their effects on clover growth. A total of 57 rhizobia were isolated and their genetic diversities were studied through 16S rRNA and nifD genes. The isolates were inoculated to clover (Afghan local variety), to investigate the potential of nitrogen fixation and influences of clover growth. The 16S rRNA gene analysis showed two distinct groups of Rhizobium (94.7%) and Ensifer (5.3%) species. The nifD phylogenetic relationship revealed a high similarity to Rhizobium and a novel lineage group close to Rhizobium leguminosarum species. In the plant test, different genotypes significantly (p < 0.01) exhibited an increase in plant biomass production, compared to the un-inoculated plants. Among genotypes, the highest plant biomass was recorded in PC8 (1769.0 mg/plant) and PC9 (1409.2 mg/plant) isolates as compared to un-inoculated plants (144.0 mg/plant). Moreover, these isolates showed maximum nitrogen fixation rates of 8.2 and 6.5 µM/plant, respectively. These isolates were identified as the most promising rhizobial strains for developing biofertilizers in the context of Afghanistan.
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- 2024
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17. Association between occurrence of multiple white and flat elevated gastric lesions and oral proton pump inhibitor intake
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Rino Hasegawa, Kenshi Yao, Takao Kanemitsu, Hisatomi Arima, Takayuki Hirase, Yuuya Hiratsuka, Kazuhiro Takeda, Kentaro Imamura, Kensei Ohtsu, Yoichiro Ono, Masaki Miyaoka, Takashi Hisabe, Toshiharu Ueki, Hiroshi Tanabe, Atsuko Ohta, and Satoshi Nimura
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hypergastrinemic ,multiple white and flat elevated lesions ,proton pump inhibitors ,stomach ,Internal medicine ,RC31-1245 ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background/Aims Multiple white and flat elevated lesions (MWFL) that develop from the gastric corpus to the fornix may be strongly associated with oral antacid intake. Therefore, this study aimed to determine the association between the occurrence of MWFL and oral proton pump inhibitor (PPI) intake and clarify the endoscopic and clinicopathological characteristics of MWFL. Methods The study included 163 patients. The history of oral drug intake was collected, and serum gastrin levels and anti-Helicobacter pylori immunoglobulin G antibody titers were measured. Upper gastrointestinal endoscopy was performed. The primary study endpoint was the association between MWFL and oral PPI intake. Results In the univariate analyses, MWFL were observed in 35 (49.3%) of 71 patients who received oral PPIs and 10 (10.9%) of 92 patients who did not receive oral PPIs. The occurrence of MWFL was significantly higher among patients who received PPIs than in those who did not (p
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- 2024
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18. Effect of rapid cefpodoxime disk screening for early detection of third-generation cephalosporin resistance in Escherichia coli and Klebsiella pneumoniae bacteremia
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Mikiyasu Sakai, Takamasa Sakai, Yuki Nagata, Hiroko Komai, Yoshio Miyake, Toshitaka Watariguchi, Atsushi Kawabata, and Fumiko Ohtsu
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Antimicrobial susceptibility testing ,Bacteremia ,Antimicrobial resistance ,Therapeutics. Pharmacology ,RM1-950 ,Pharmacy and materia medica ,RS1-441 - Abstract
Abstract Background Several methods have been reported for detecting resistance genes or phenotypic testing on the day of positive blood culture in Escherichia coli or Klebsiella pneumoniae bacteremia. However, some facilities have not introduced these methods because of costs or other reasons. Toyota Kosei Hospital introduced cefpodoxime (CPDX) rapid screening on May 7, 2018, to enable early detection of third-generation cephalosporin resistance. In this study, we aimed to evaluate the effects of intervention with an Antimicrobial Stewardship Team using CPDX rapid screening. Methods Cefotaxime (CTX)-resistant E. coli or K. pneumoniae bacteremia cases were selected retrospectively and divided into two groups: the pre-CPDX screening (June 1, 2015, to May 6, 2018) and CPDX screening groups (July 7, 2018, to August 31, 2021). The primary outcome was the proportion of cases in which modifications were made to the administration of susceptible antimicrobial agents within 24 h of blood culture-positive reports. Results Overall, 63 patients in the pre-CPDX screening group and 84 patients in the CPDX screening group were eligible for analysis. The proportion of patients who modified to susceptible antimicrobial agents within 24 h of blood culture-positive reports was significantly increased in the CPDX screening group compared to that in the pre-CPDX screening group (6.3% vs. 22.6%, p = 0.010). Conclusion The results demonstrated that in CTX-resistant E. coli or K. pneumoniae bacteremia, CPDX rapid screening increased the proportion of early initiation of appropriate antimicrobial agents.
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- 2023
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19. Predictive models of long‐term survival outcomes following radical cystectomy
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Akira Ohtsu, Seiji Arai, Yuji Fujizuka, Yoshiyuki Miyazawa, Masashi Nomura, Yoshitaka Sekine, Hidekazu Koike, Hiroshi Matsui, Yasuhiro Shibata, Kazuto Ito, and Kazuhiro Suzuki
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bladder cancer ,cystectomy ,GUOSG score ,predictive model ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Identifying the likelihood of life‐threatening recurrence after radical cystectomy by reliable and user‐friendly predictive models remains an unmet need in the clinical management of invasive bladder cancer. Methods A total of 204 consecutive patients undergoing open radical cystectomy (ORC) for bladder cancer were retrospectively enrolled between May 2005 and August 2020. Clinicopathological and peri‐ORC therapeutic data were extracted from clinical records. We explored predictive factors that significantly affected the primary endpoint of overall survival (OS) and secondary endpoints of cancer‐specific survival (CSS) and recurrence‐free survival (RFS). Results During a median follow‐up of 3.9 years, 42 (20.6%) and 10 (4.9%) patients died due to bladder cancer and other causes, respectively. Five‐year RFS, CSS, and OS were 66.5%, 77.6%, and 75.4%, respectively. Pathological T and N categories and lymphovascular invasion (LVI) significantly affected RFS by Cox regression analysis. Accordingly, clinical T and pathological N categories and LVI significantly affected CSS. Clinical T and pathological N categories, LVI, age, and ORC tumor grade significantly affected OS. Based on the assessment score for each independent risk factor, we developed the Gunma University Oncology Study Group (GUOSG) score, which predicts RFS, CSS, and OS. The GUOSG score classified four groups for RFS, three for CSS, and five for OS, with statistically significant distribution for nearly all comparisons. Conclusions The GUOSG model is helpful to show individualized prognosis and functions as a risk‐stratified historical cohort for assessing the lifelong efficacy of new salvage treatment regimens.
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- 2023
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20. Comparative effectiveness of tocilizumab vs standard care in patients with severe COVID-19-related pneumonia: a retrospective cohort study utilizing registry data as a synthetic control
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Yukari Uemura, Ryoto Ozaki, Tomohiro Shinozaki, Hiroshi Ohtsu, Yousuke Shimizu, Kazuo Izumi, Sho Saito, Nobuaki Matsunaga, and Norio Ohmagari
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Tocilizumab ,COVID-19-related pneumonia ,Synthetic control ,COVID-19 Registry Japan ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background The severity of coronavirus disease 2019 (COVID-19) infections has led to the development of several therapeutic agents, with tocilizumab becoming increasingly used to treat patients with COVID-19-related pneumonia. This study compared the use of tocilizumab treatment with the standard of care (SOC) to determine its efficacy against severe COVID-19-related pneumonia in Japan. Methods This retrospective cohort study was designed to evaluate the efficacy of tocilizumab in two different databases: the JA42434 single-arm study and COVID-19 Registry Japan (COVIREGI-JP), with a synthetic control group from the COVIREGI-JP cohort as a benchmark for the tocilizumab group. The study’s primary objective was to evaluate the efficacy of tocilizumab in treating severe COVID-19-related pneumonia compared to the SOC among patients included in the above two databases. The SOC group was extracted as the synthetic control group using exact matching and a propensity score matching in sequence per subject. As a secondary objective, the efficacy of tocilizumab compared to the SOC was evaluated exclusively among patients included in the COVIREGI-JP database. In each objective, the primary endpoint was defined as the time to discharge or the status of awaiting discharge. Results For the primary endpoint, the hazard ratio (HR) of the tocilizumab group against the SOC group was 1.070 (95% confidence interval [CI]: 0.565–2.028). The median time from Study Day 1 to discharge or the state of awaiting discharge was 15 days in the tocilizumab group and 16 days in the SOC group. The HRs for the secondary endpoints, namely, time to improvement in the clinical state, time to clinical failure, and time to recovery, were 1.112 (95% CI: 0.596–2.075), 0.628 (95% CI: 0.202–1.953), and 1.019 (95% CI: 0.555–1.871), respectively. Similarly, the HR of the primary endpoint for the secondary objective was 0.846 (95% CI: 0.582–1.230). Conclusions Tocilizumab did not demonstrate a positive effect on time to discharge or the state of awaiting discharge. Furthermore, no statistically significant differences in other clinical outcomes, such as time to improvement in the clinical state, time to clinical failure, and time to recovery, were observed among the groups.
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- 2023
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21. Synthesis and luminescence properties of substituted benzils
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Masamichi Yasui, Takashi Fujihara, Hiroyoshi Ohtsu, Yuki Wada, Terumasa Shimada, Yiying Zhu, Masaki Kawano, Kengo Hanaya, Takeshi Sugai, and Shuhei Higashibayashi
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Chemistry ,QD1-999 - Abstract
Abstract Photophysical properties of benzil (1,2-diphenylethane-1,2-dione) and its derivatives in the crystal state have recently attracted much attention. However, the study of substituted benzils has mostly been limited to para-substituted derivatives, which did not induce a significant effect on the emission wavelength compared to pristine benzil. The effects of ortho- and meta-substituents on the photophysical properties in the crystal state have not been investigated so far. Our recently developed organocatalytic pinacol coupling of substituted benzaldehydes allowed us to prepare various ortho-, meta-, and para-substituted benzil derivatives and to investigate their luminescence properties. Ortho- and meta-substituents affected the electronic states of benzils in the crystal state, resulting in differences in their luminescence properties. The luminescence wavelength and type, i.e., phosphorescence or fluorescence, were altered by these substituents. Fast self-recovering phosphorescence-to-phosphorescence mechanochromism by the para-CF3 substituent at room temperature was also discovered.
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- 2023
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22. Successful embolization of subcutaneous mesenteric varices within an ileal conduit in a patient with liver cirrhosis
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Ayaka Sakurai, Akira Ohtsu, Seiji Arai, Masanori Aoki, Miho Ikeya, Hiroyuki Tokue, Keisuke Hori, Yuji Fujizuka, Yoshitaka Sekine, Hidekazu Koike, and Kazuhiro Suzuki
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embolization ,ileal conduit ,liver cirrhosis ,mesenteric veins ,varices ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Introduction Venous hemorrhage from ectopic varices is potentially fatal. This report describes a rare case in which bleeding from mesenteric varices in an ileal conduit was treated successfully by embolization therapy. Case presentation The patient was an 82‐year‐old man who had previously undergone total pelvic exenteration for colon cancer with creation of an ileal conduit for urinary diversion. He subsequently developed liver cirrhosis and underwent partial hepatectomy for hepatocellular carcinoma. 9 years after his colon surgery, he was admitted with gross hematuria. Computed tomography revealed subcutaneous mesenteric varices in the ileal conduit and hemorrhage as a result of rupture of the varices. The bleeding continued despite repeated manual compression but was eventually stopped by embolization therapy. Conclusion Embolization therapy may be helpful for hemostasis in the event of intractable bleeding from mesenteric varices in an ileal conduit.
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- 2023
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23. Analysis of factors affecting pharmacists' ability to identify and solve problems
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Keigo Watanabe, Takamasa Sakai, and Fumiko Ohtsu
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Pharmacists ,Self-improvement ,Japan ,Academic conferences ,Problem-solving ,Therapeutics. Pharmacology ,RM1-950 ,Pharmacy and materia medica ,RS1-441 - Abstract
Abstract Background Among Japanese pharmacists, there is a gap in their commitment to self-improvement and a possible gap in their ability to identify and solve problems. However, the factors causing this situation have not yet been clarified. This study was conducted to identify factors that influence the abilities of Japanese pharmacists to identify and solve problems, which are skills considered essential for this profession. A prior history of presenting at academic conferences was set as a surrogate outcome to clarify whether having this experience affects the factors. Methods A nationwide internet-based survey was conducted among 300 participating hospitals and 300 community pharmacists. The survey was discontinued when the sample size of each group reached 300. The respondents were categorized into two groups on the basis of their experience of presenting at academic conferences in the survey item “status of self-improvement after employment.” Their association with other survey items was determined using univariate and multivariate logistic regression analyses. Results The multivariate analysis revealed that 152 (50.7%) hospital pharmacists and 41 (13.7%) community pharmacists had presented at academic conferences. Among the hospital pharmacists, the experience of presenting at academic conferences was significantly associated with the “age 30 s (*references 20 s),” “presence of pharmacists to consult,” “experience supervising interns,” and “number of types of self-improvement” factors. For the community pharmacists, prior conference presentation experience was significantly associated with “age over 70 s,” “highest educational background (doctoral or master’s degree),” and “number of types of self-improvement.” Conclusion This pioneering study suggests that having prior experience of presenting at academic conferences as a surrogate outcome of pharmacists' problem-finding and problem-solving skills may be related to the support provided by human environmental factors at the facility, the status of self-improvement, and the highest educational background.
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- 2023
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24. Evaluation of a new method, 'non-injection resection using bipolar soft coagulation mode (NIRBS)', for colonic adenomatous lesions
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Mitsuo Tokuhara, Masaaki Shimatani, Kazunari Tominaga, Hiroko Nakahira, Takuya Ohtsu, Katsuyasu Kouda, and Makoto Naganuma
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bipolar snare ,colorectal lesion ,endoscopic mucosal resection ,non-injection ,soft coagulation mode ,Internal medicine ,RC31-1245 ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background/Aims Endoscopic resection of all colorectal adenomatous lesions with a low complication rate, simplicity, and negative residuals is challenging. Hence, we developed a new method called “non-injection resection using bipolar soft coagulation mode (NIRBS)” method, adapted for colorectal lesions. In addition, we evaluated the effectiveness of this method. Methods We performed NIRBS throughout a 12-month period for all colorectal lesions which snare resection was acceptable without cancerous lesions infiltrating deeper than the submucosal layer. Results A total of 746 resected lesions were included in the study, with a 4.5 mm mean size (range, 1–35 mm). The major pathological breakdowns were as follows: 64.3% (480/746) were adenomas, and 5.0% (37/746) were intraepithelial adenocarcinomas (Tis lesions). No residuals were observed in any of the 37 Tis lesions (mean size, 15.3 mm). Adverse events included bleeding (0.4%) but no perforation. Conclusions NIRBS allowed the resection of multiple lesions with simplicity because of the non-injection and without perforating due to the minimal burn effect of the bipolar snare set in the soft coagulation mode. Therefore, NIRBS can be used to resect adenomatous lesions easily, including Tis lesions, from small to large lesions without leaving residuals.
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- 2023
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25. A powered simple walking model explains the decline in propulsive force and hip flexion torque compensation in human gait
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Hajime Ohtsu, Kazunori Hase, Kouta Sakoda, Shinya Aoi, Shunsuke Kita, and Shinya Ogaya
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Medicine ,Science - Abstract
Abstract Excessive hip flexion torque to prioritize leg swings in the elderly is likely to be a factor that reduces their propulsive force and gait stability, but the mechanism is not clear. To understand the mechanism, we investigated how propulsive force, hip flexion torque, and margin of stability (MoS) change when only the hip spring stiffness is increased without changing the walking speed in the simple walking model, and verified whether the relationship holds in human walking. The results showed that at walking speeds between 0.50 and 1.75 m/s, increasing hip spring stiffness increased hip flexion torque and decreased the propulsive force and MoS in both the model and human walking. Furthermore, it was found that the increase in hip flexion torque was explained by the increase in spring stiffness, and the decreases in the propulsive force and MoS were explained by the increase in step frequency associated with the increase in spring stiffness. Therefore, the increase in hip flexion torque likely decreased the propulsive force and MoS, and this mechanism was explained by the intervening hip spring stiffness. Our findings may help in the control design of walking assistance devices, and in improving our understanding of elderly walking strategies.
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- 2023
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26. Effect of rhizobium inoculation on rhizosphere phosphorous dynamics and fertilised phosphorous use efficiency in a maize–pigeon pea intercropping system in weathered tropical soil
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Saki Yamamoto, Shin Okazaki, Nakei D. Monica, Naoko Ohkama‐Ohtsu, Haruo Tanaka, and Soh Sugihara
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highly weathered soil ,intercropping ,phosphorus use efficiency ,rhizobium inoculation ,rhizosphere P dynamics ,Agriculture (General) ,S1-972 ,Environmental sciences ,GE1-350 - Abstract
Abstract Introduction Low phosphorus (P) use efficiency (PUE) of fertiliser is a critical problem in sustainable crop production, especially in strongly weathered tropical soils with a high P‐fixation capacity. Both intercropping and rhizobium inoculation have shown to improve the P availability of rhizosphere soil, but the effect of a combined approach of using both intercropping and rhizobium inoculation is still unclear. In this study, we aimed to evaluate the effect of rhizobium inoculation on the soil–plant P dynamics and fertilised PUE under the intercropping system in strongly weathered tropical soil. Materials and Methods We conducted an 85‐day cultivation pot experiment with pigeon pea (PP) and maize using highly weathered tropical soil under eight treatments: monocropping (CS) or intercropping, with or without rhizobium (Bradyrhizobium elkanii USDA61) inoculation (−I, +I) and with or without P fertilisation (0P, 50P) (2 × 2 × 2 = 8 treatments). We evaluated the effects of intercropping and rhizobium inoculation on plant growth parameters, P dynamics of the rhizosphere and bulk soil using the Hedley P fractionation method, the amount of organic acid from plant roots as a plant P‐mobilising capacity, and fertilised PUE. Results Total plant P uptake per pot was significantly increased by intercropping but not by combining intercropping and rhizobium inoculation, resulting in better fertilised PUE only in intercropping. The available inorganic P (Pi) and less labile Pi of the soil were higher in the rhizosphere than those in the bulk by intercropping under 50P and were similar in PP + I under 50 P. The amount of organic acid per pot under 50P increased with each treatment, that is, intercropping and rhizobium inoculation, but not with their combination. Conclusion The intercropping system has a strong potential to improve PUE by stimulating the P‐mobilising capacity of intercropping plant roots, whereas rhizobium inoculation of the intercropping system did not improve PUE in this study.
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- 2023
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27. Comparative effectiveness of tocilizumab vs standard care in patients with severe COVID-19-related pneumonia: a retrospective cohort study utilizing registry data as a synthetic control
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Uemura, Yukari, Ozaki, Ryoto, Shinozaki, Tomohiro, Ohtsu, Hiroshi, Shimizu, Yousuke, Izumi, Kazuo, Saito, Sho, Matsunaga, Nobuaki, and Ohmagari, Norio
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- 2023
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28. Effect of rapid cefpodoxime disk screening for early detection of third-generation cephalosporin resistance in Escherichia coli and Klebsiella pneumoniae bacteremia
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Sakai, Mikiyasu, Sakai, Takamasa, Nagata, Yuki, Komai, Hiroko, Miyake, Yoshio, Watariguchi, Toshitaka, Kawabata, Atsushi, and Ohtsu, Fumiko
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- 2023
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29. Synthesis and luminescence properties of substituted benzils
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Yasui, Masamichi, Fujihara, Takashi, Ohtsu, Hiroyoshi, Wada, Yuki, Shimada, Terumasa, Zhu, Yiying, Kawano, Masaki, Hanaya, Kengo, Sugai, Takeshi, and Higashibayashi, Shuhei
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- 2023
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30. Analysis of factors affecting pharmacists' ability to identify and solve problems
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Watanabe, Keigo, Sakai, Takamasa, and Ohtsu, Fumiko
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- 2023
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31. A powered simple walking model explains the decline in propulsive force and hip flexion torque compensation in human gait
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Ohtsu, Hajime, Hase, Kazunori, Sakoda, Kouta, Aoi, Shinya, Kita, Shunsuke, and Ogaya, Shinya
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- 2023
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32. TiNbSn stems with gradient changes of Young’s modulus and stiffness reduce stress shielding compared to the standard fit-and-fill stems
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Baba, Kazuyoshi, Mori, Yu, Chiba, Daisuke, Kuwahara, Yoshiyuki, Kurishima, Hiroaki, Tanaka, Hidetatsu, Kogure, Atsushi, Kamimura, Masayuki, Yamada, Norikazu, Ohtsu, Susumu, Oyama, Masamizu, Masahashi, Naoya, Hanada, Shuji, Itoi, Eiji, and Aizawa, Toshimi
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- 2023
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33. Retroperitoneal urothelial carcinoma arising after bladder diverticulectomy: a case report
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Ohtsu, Akira, Arai, Seiji, Fujizuka, Yuji, Fukuda, Reon, Hori, Keisuke, Morimura, Yuki, Kawahara, Rintaro, Shiraishi, Takuya, Ogawa, Hiroomi, Miyazawa, Yoshiyuki, Nomura, Masashi, Sekine, Yoshitaka, Koike, Hidekazu, Matsui, Hiroshi, and Suzuki, Kazuhiro
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- 2023
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34. Toward a Treatment Sequencing Strategy: A Systematic Review of Treatment Regimens in Advanced Gastric Cancer/Gastroesophageal Junction Adenocarcinoma
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Catenacci, Daniel V, Chao, Joseph, Muro, Kei, Al‐Batran, Salah Eddin, Klempner, Samuel J, Wainberg, Zev A, Shah, Manish A, Rha, Sun Young, Ohtsu, Atsushi, Liepa, Astra M, Knoderer, Holly, Chatterjee, Anindya, and Van Cutsem, Eric
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Biomedical and Clinical Sciences ,Clinical Sciences ,Oncology and Carcinogenesis ,Rare Diseases ,Clinical Trials and Supportive Activities ,Clinical Research ,Cancer ,Digestive Diseases ,Evaluation of treatments and therapeutic interventions ,6.1 Pharmaceuticals ,Adenocarcinoma ,Antineoplastic Combined Chemotherapy Protocols ,Esophageal Neoplasms ,Esophagogastric Junction ,Humans ,Stomach Neoplasms ,Gastroesophageal adenocarcinoma ,Systemic therapy ,Treatment sequencing ,Randomized controlled trials ,Oncology & Carcinogenesis ,Oncology and carcinogenesis - Abstract
BackgroundPlatinum and fluoropyrimidine combinations typically comprise first-line (1L) therapy in advanced gastric cancer or gastroesophageal junction adenocarcinoma (G/GEA), although controversy exists regarding the use of 5doublet versus triplet cytotoxic regimens. Historically, second-line (2L) and third-line or later (3L+) therapy has been fragmented. Recent trials have increased the need for optimal treatment sequencing in advanced G/GEA.Materials and methodsWe conducted a systematic search of peer-reviewed manuscripts of randomized clinical trials examining 1L, 2L, and 3L+ therapy for advanced G/GEA published from 2009 through November 19, 2019. When available, overall survival, progression-free survival, time to progression, overall response rate, and toxicity were extracted from each and compared descriptively.ResultsIn 1L therapy, chemotherapy triplets demonstrated variable efficacy improvements with invariable increased toxicity compared with platinum/fluoropyrimidine doublets. Currently, the only published report of positive outcomes using biologics in 1L describes adding trastuzumab in HER2-overexpressing advanced G/GEA. In 2L, doublet chemotherapy regimens are not uniformly more efficacious than single-agent taxanes or irinotecan, and ramucirumab has demonstrated improved outcomes both as monotherapy and in combination.ConclusionFor advanced G/GEA, review of trial results from 2009-2019 support 1L therapy with platinum and fluoropyrimidine and sequencing with taxanes or irinotecan in combination with biologics as effective 2L options. Escalating to a triplet may add some efficacy at the expense of added toxicity.Implications for practiceThe rapidly changing treatment landscape for advanced gastric cancer includes increasing options for refractory disease. With multiple first-line platinum-based regimens, identification of those with the best benefit-to-risk ratio may provide guidance on treatment sequencing strategies. This article presents findings from the published literature of randomized controlled trials that included a first-line platinum/fluoropyrimidine combination and, for second-line trials, patients with platinum/fluoropyrimidine-refractory disease. This guiding summary could be a tool for clinicians to identify the optimal first-line regimen(s) followed by a strategy for subsequent regimens.
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- 2021
35. TiNbSn stems with gradient changes of Young’s modulus and stiffness reduce stress shielding compared to the standard fit-and-fill stems
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Kazuyoshi Baba, Yu Mori, Daisuke Chiba, Yoshiyuki Kuwahara, Hiroaki Kurishima, Hidetatsu Tanaka, Atsushi Kogure, Masayuki Kamimura, Norikazu Yamada, Susumu Ohtsu, Masamizu Oyama, Naoya Masahashi, Shuji Hanada, Eiji Itoi, and Toshimi Aizawa
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TiNbSn alloy ,Total hip arthroplasty ,Stress shielding ,Low Young’s modulus ,Functionally graded characteristics ,Medicine - Abstract
Abstract Background The difference between Young’s moduli of the femur and the stem causes stress shielding (SS). TiNbSn (TNS) stem has a low Young’s modulus and strength with gradient functional properties during the change in elastic modulus with heat treatment. The aim of this study was to investigate the inhibitory effect of TNS stems on SS and their clinical outcomes compared to conventional stems. Methods This study was a clinical trial. Primary THA was performed using a TNS stem from April 2016 to September 2017 for patients in the TNS group. Unilateral THA was performed using a Ti6Al4V alloy stem from January 2007 to February 2011 for patients in the control group. The TNS and Ti6Al4V stems were matched in shape. Radiographs were obtained at the 1- and 3-year follow-ups. Two surgeons independently checked the SS grade and appearance of cortical hypertrophy (CH). The Japanese Orthopaedic Association (JOA) scores before and 1 year after surgery were assessed as clinical scores. Results None of the patients in the TNS group had grade 3 or 4 SS. In contrast, in the control group, 24% and 40% of patients had grade 3 and 4 SS at the 1- and 3-year follow-ups, respectively. The SS grade was lower in the TNS group than in the control group at the 1- and 3-year follow-ups (p
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- 2023
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36. Chronic heat stress induces renal fibrosis and mitochondrial dysfunction in laying hens
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Fumika Nanto-Hara, Makoto Yamazaki, Hitoshi Murakami, and Haruhiko Ohtsu
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cGAS-STING ,Heat stress ,Laying hens ,Mitochondrial DNA ,Renal fibrosis ,Animal culture ,SF1-1100 ,Veterinary medicine ,SF600-1100 - Abstract
Abstract Background Heat stress in laying hens negatively affects egg production and shell quality by disrupting the homeostasis of plasma calcium and phosphorus levels. Although the kidney plays an important role in calcium and phosphorus homeostasis, evidence regarding the effect of heat stress on renal injury in laying hens is yet to be elucidated. Therefore, the aim of this study was to evaluate the effects of chronic heat stress on renal damage in hens during laying periods. Methods A total of 16 white-leghorn laying hens (32 weeks old) were randomly assigned to two groups (n = 8). One group was exposed to chronic heat stress (33 °C for 4 weeks), whereas the other group was maintained at 24 °C. Results Chronic heat exposure significantly increased plasma creatinine and decreased plasma albumin levels (P
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- 2023
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37. Efficacy of endoscopy under general anesthesia for the detection of synchronous lesions in oral hypopharyngeal cancer
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Yoichiro Ono, Kenshi Yao, Yasuhiro Takaki, Satoshi Ishikawa, Kentaro Imamura, Akihiro Koga, Kensei Ohtsu, Takao Kanemitsu, Masaki Miyaoka, Takashi Hisabe, Toshiharu Ueki, Atsuko Ota, Hiroshi Tanabe, Seiji Haraoka, Satoshi Nimura, Akinori Iwashita, Susumu Sato, and Rumie Wakasaki
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anesthesia, general ,squamous cell carcinoma of the head and neck ,transoral surgery ,Internal medicine ,RC31-1245 ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background/Aims Image-enhanced endoscopy can detect superficial oro-hypopharyngeal squamous cell carcinoma; however, reliable endoscopy of the pharyngeal region is challenging. Endoscopy under general anesthesia during transoral surgery occasionally reveals multiple synchronous lesions that remained undetected on preoperative endoscopy. Therefore, we aimed to determine the lesion detection capability of endoscopy under general anesthesia for superficial oro-hypopharyngeal squamous cell carcinoma. Methods This retrospective study included 63 patients who underwent transoral surgery for superficial oropharyngeal squamous cell carcinoma between April 2005 and December 2020. The primary endpoint was to compare the lesion detection capabilities of preoperative endoscopy and endoscopy under general anesthesia. Other endpoints included the comparison of clinicopathological findings between lesions detected using preoperative endoscopy and those newly detected using endoscopy under general anesthesia. Results Fifty-eight patients (85 lesions) were analyzed. The mean number of lesions per patient detected was 1.17 for preoperative endoscopy and 1.47 for endoscopy under general anesthesia. Endoscopy under general anesthesia helped detect more lesions than preoperative endoscopy did (p
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- 2023
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38. Retroperitoneal urothelial carcinoma arising after bladder diverticulectomy: a case report
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Akira Ohtsu, Seiji Arai, Yuji Fujizuka, Reon Fukuda, Keisuke Hori, Yuki Morimura, Rintaro Kawahara, Takuya Shiraishi, Hiroomi Ogawa, Yoshiyuki Miyazawa, Masashi Nomura, Yoshitaka Sekine, Hidekazu Koike, Hiroshi Matsui, and Kazuhiro Suzuki
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Urothelial carcinoma ,Diverticulectomy ,Multiparametric MRI ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Abstract Background Urothelial carcinoma arises from the inner urothelial membrane of the renal pelvis, ureter, and bladder and often causes macrohematuria. Here, we report a rare case in which the patient developed non-symptomatic urothelial carcinoma anatomically outside the bladder wall 17 years after bladder diverticulectomy. Case presentation An 82-year-old male patient previously underwent gastrectomy for stomach cancer and partial hepatectomy for intrahepatic cholangiocarcinoma. Follow-up computed tomography revealed a tumor in the retroperitoneal space, where a bladder diverticulum was removed 17 years earlier. Multiparametric magnetic resonance imaging suggested that the tumor was malignant with rectal invasion. Subsequent computed tomography-guided percutaneous biopsy revealed that the tumor was urothelial carcinoma. The patient underwent two courses of neoadjuvant chemotherapy followed by pelvic exenteration with pelvic lymph node dissection. He is currently receiving adjuvant therapy with an immune checkpoint inhibitor and has had no recurrence for 3 months. Conclusions Multiparametric magnetic resonance imaging is a helpful tool for predicting both tumor malignancy and invasion before a pathologically confirmed diagnosis. Although this case is rare, urologists should be aware of the occurrence of urothelial carcinoma after bladder diverticulectomy in cases of incomplete resection of the diverticulum.
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- 2023
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39. The emerging role of real-world data in oncology care in Japan
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Bando, H., Tajima, E., Aoyagi, Y., Ng, D., Mizuguchi, K., Suzuki, M., Takeda, Y., Misumi, T., Brown, L., Murchison, M., Lamba, V., Zeng, Y., Froment, M., Jung, J., Fedak, K., Wang, B., Yoshino, T., and Ohtsu, A.
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- 2023
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40. ARCAD-Asia initiative: leveraging yesterday’s data for tomorrow
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Takeda, Y., Misumi, T., Bando, H., Suzuki, M., Wakabayashi, M., Oki, E., Yamazaki, K., Kakeji, Y., Shitara, K., Terashima, M., Raeisi, M., Maehara, Y., Ohtsu, A., Andre, T., de Gramont, A., Shi, Q., and Yoshino, T.
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- 2023
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41. Tumor Response and Symptom Palliation from RAINBOW, a Phase III Trial of Ramucirumab Plus Paclitaxel in Previously Treated Advanced Gastric Cancer
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Cascinu, Stefano, Bodoky, György, Muro, Kei, Van Cutsem, Eric, Oh, Sang Cheul, Folprecht, Gunnar, Ananda, Sumitra, Girotto, Gustavo, Wainberg, Zev A, Miron, Maria Luisa Limon, Ajani, Jaffer, Wei, Ran, Liepa, Astra M, Carlesi, Roberto, Emig, Michael, and Ohtsu, Atsushi
- Subjects
Biomedical and Clinical Sciences ,Oncology and Carcinogenesis ,Clinical Trials and Supportive Activities ,Clinical Research ,Rare Diseases ,Cancer ,Digestive Diseases ,Evaluation of treatments and therapeutic interventions ,6.1 Pharmaceuticals ,Antibodies ,Monoclonal ,Humanized ,Antineoplastic Combined Chemotherapy Protocols ,Humans ,Paclitaxel ,Quality of Life ,Stomach Neoplasms ,Ramucirumab ,Gastric cancer ,Gastroesophageal junction adenocarcinoma ,Oncology & Carcinogenesis ,Oncology and carcinogenesis - Abstract
BackgroundIn the intent-to-treat (ITT) population of the RAINBOW study, objective response rate (ORR) was 28% and 16% in the ramucirumab and control arms, respectively. To further characterize tumor response, we present details on timing and extent of tumor shrinkage, as well as associations with symptom palliation.Materials and methodsTumor response was assessed with RECIST v1.1, and quality of life (QoL) was assessed with the European Organization for Research and Treatment of Cancer Quality-of-Life Questionnaire-Core 30 (EORTC QLQ-C30) v3.0. Prespecified and post hoc analyses were conducted in the ITT population, patients with measurable disease, or responders, and included best overall response (BOR), ORR, disease control rate (DCR), duration of response, time to response (TtR), change in tumor size, and associations of QoL with tumor shrinkage and BOR.ResultsIn both treatment arms, median TtR was 1.5 months. Responses were more durable in the ramucirumab versus control arm (median 4.4 vs. 2.8 months). In patients with measurable disease (78% of ITT), ORR was 36% versus 20%; DCR was 81% versus 61% in the ramucirumab versus control arms. Waterfall plots demonstrated more tumor shrinkage in the ramucirumab versus control arm. Regardless of treatment, tumor response and stable disease were associated with improved or stable QoL, with more tumor shrinkage associated with greater symptom palliation.ConclusionTreatment with ramucirumab plus paclitaxel yielded the highest ORR reported to date for patients with previously treated advanced gastric or gastroesophageal junction adenocarcinoma. Additional details demonstrate robustness of tumor response results. The extent of tumor shrinkage is directly associated with symptom palliation and should be considered when evaluating patient needs and treatment selection. Clinical trial identification number. NCT01170663.Implications for practiceRamucirumab plus paclitaxel is a recognized standard of care as it improves survival for patients with advanced gastric or gastroesophageal junction adenocarcinoma who have been previously treated with recommended first-line therapy. These additional data on tumor response demonstrate a positive association between tumor shrinkage and symptom palliation in a patient population that is often symptomatic. These observations included patients with nonmeasurable disease, a group of patients often underrepresented in clinical trials. This knowledge can inform treatment decisions, which align individual patient characteristics and needs with demonstrated benefits.
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- 2021
42. Effect of Bacterial Extracellular Polymeric Substances from Enterobacter spp. on Rice Growth under Abiotic Stress and Transcriptomic Analysis
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Yosra Aoudi, Shin-ichiro Agake, Safiullah Habibi, Gary Stacey, Michiko Yasuda, and Naoko Ohkama-Ohtsu
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extracellular polymeric substances ,abiotic stress ,RNA-seq analysis ,gene ontology analysis ,Enterobacter spp. ,plant biostimulants ,Biology (General) ,QH301-705.5 - Abstract
Plant biostimulants have received attention as sustainable alternatives to chemical fertilizers. Extracellular polymeric substances (EPSs), among the compounds secreted by plant growth-promoting rhizobacteria (PGPRs), are assumed to alleviate abiotic stress. This study aims to investigate the effect of purified EPSs on rice under abiotic stress and analyze their mechanisms. A pot experiment was conducted to elucidate the effects of inoculating EPSs purified from PGPRs that increase biofilm production in the presence of sugar on rice growth in heat-stress conditions. Since all EPSs showed improvement in SPAD after the stress, Enterobacter ludwigii, which was not characterized as showing higher PGP bioactivities such as phytohormone production, nitrogen fixation, and phosphorus solubilization, was selected for further analysis. RNA extracted from the embryos of germinating seeds at 24 h post-treatment with EPSs or water was used for transcriptome analysis. The RNA-seq analysis revealed 215 differentially expressed genes (DEGs) identified in rice seeds, including 139 up-regulated and 76 down-regulated genes. A gene ontology (GO) enrichment analysis showed that the enriched GO terms are mainly associated with the ROS scavenging processes, detoxification pathways, and response to oxidative stress. For example, the expression of the gene encoding OsAAO5, which is known to function in detoxifying oxidative stress, was two times increased by EPS treatment. Moreover, EPS application improved SPAD and dry weights of shoot and root by 90%, 14%, and 27%, respectively, under drought stress and increased SPAD by 59% under salt stress. It indicates that bacterial EPSs improved plant growth under abiotic stresses. Based on our results, we consider that EPSs purified from Enterobacter ludwigii can be used to develop biostimulants for rice.
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- 2024
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43. Analysis of clinicopathological factors associate with the visibility of early gastric cancer in endoscopic examination and usefulness of linked color imaging: A multicenter prospective study.
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Kensuke Fukuda, Kazuhiro Mizukami, Daisuke Yamaguch, Yuichiro Tanaka, Kazutoshi Hashiguchi, Takashi Akutagawa, Ryo Shimoda, Sho Suzuki, Tadashi Miike, Yorinobu Sumida, Hidehito Maeda, Fumisato Sasaki, Ryosuke Gushima, Hideaki Miyamoto, Keiichi Hashiguchi, Naoyuki Yamaguchi, Tetsuya Ohira, Tetsu Kinjo, Ken Ohnita, Tomohiko Moriyama, Kensei Ohtsu, Akira Aso, Ryo Ogawa, Tetsuya Ueo, and Masahide Fukuda
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Medicine ,Science - Abstract
BackgroundThis study investigated clinicopathological factors associated with the visibility of early gastric cancer and the efficacy of linked color imaging.MethodsPatients with early gastric cancer who underwent endoscopic treatment between April 2021 and July 2022 were enrolled. All cases underwent white light imaging and linked color imaging. Three experts evaluated lesion visibility using a visual analog scale. A mean score ≥3 on white light imaging was defined as "good visibility", and ResultsNinety-seven lesions were analyzed, with good visibility in 49 and poor visibility in 48. Multivariate analysis revealed small lesion size (odds ratio 1.89) and presence of endoscopic intestinal metaplasia (odds ratio 0.49) as significantly associated with the poor visibility of early gastric cancer. Mean visibility score was significantly higher for linked color imaging (PConclusionsLesion size and endoscopic intestinal metaplasia are associated with the visibility of early gastric cancer in white light imaging. Linked color imaging improves visibility of gastric cancer with these factors.
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- 2024
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44. High red blood cell distribution width attenuates the effectiveness of Immune checkpoint inhibitor therapy: An exploratory study using a clinical data warehouse.
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Hiromi Matsumoto, Taichi Fukushima, Nobuaki Kobayashi, Yuuki Higashino, Suguru Muraoka, Yukiko Ohtsu, Momo Hirata, Kohei Somekawa, Ayami Kaneko, Ryo Nagasawa, Sousuke Kubo, Katsushi Tanaka, Kota Murohashi, Hiroaki Fujii, Keisuke Watanabe, Nobuyuki Horita, Yu Hara, and Takeshi Kaneko
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Medicine ,Science - Abstract
BackgroundImmune checkpoint inhibitors (ICIs) have improved outcomes in cancer treatment but are also associated with adverse events and financial burdens. Identifying accurate biomarkers is crucial for determining which patients are likely to benefit from ICIs. Current markers, such as PD-L1 expression and tumor mutation burden, exhibit limited predictive accuracy. This study utilizes a Clinical Data Warehouse (CDW) to explore the prognostic significance of novel blood-based factors, such as the neutrophil-to-lymphocyte ratio and red cell distribution width (RDW), to enhance the prediction of ICI therapy benefit.MethodsThis retrospective study utilized an exploratory cohort from the CDW that included a variety of cancers to explore factors associated with pembrolizumab treatment duration, validated in a non-small cell lung cancer (NSCLC) patient cohort from electronic medical records (EMR) and CDW. The CDW contained anonymized data on demographics, diagnoses, medications, and tests for cancer patients treated with ICIs between 2017-2022. Logistic regression identified factors predicting ≤2 or ≥5 pembrolizumab doses as proxies for progression-free survival (PFS), and Receiver Operating Characteristic analysis was used to examine their predictive ability. These factors were validated by correlating doses with PFS in the EMR cohort and re-testing their significance in the CDW cohort with other ICIs. This dual approach utilized the CDW for discovery and EMR/CDW cohorts for validating prognostic biomarkers before ICI treatment.ResultsA total of 609 cases (428 in the exploratory cohort and 181 in the validation cohort) from CDW and 44 cases from EMR were selected for study. CDW analysis revealed that elevated red cell distribution width (RDW) correlated with receiving ≤2 pembrolizumab doses (p = 0.0008), with an AUC of 0.60 for predicting treatment duration. RDW's correlation with PFS (r = 0.80, pConclusionThis study suggests the utility of CDWs in identifying prognostic biomarkers for ICI therapy in cancer treatment. Elevated RDW before treatment initiation emerged as a potential biomarker of shorter therapy duration.
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- 2024
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45. FGF23‐related hypophosphatemic rickets preceding the onset of systemic lupus erythematosus: A juvenile case
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Yoko tabei, Yoshiaki Ohtsu, Masaharu Shimada, Aya Wada, Emi Hamajima, Yoshimitsu Osawa, and Takumi Takizawa
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childhood ,fibroblast growth factor‐23 ,hypophosphatemia ,rickets ,systemic lupus erythematosus ,Medicine ,Medicine (General) ,R5-920 - Abstract
Key Clinical Message This case report describes the clinical course of a juvenile female with FGF23‐related hypophosphatemic rickets preceding the onset of SLE. Our study demonstrates the possibility of hypophosphatemic rickets as an early symptom of SLE. Abstract Fibroblast growth factor 23 (FGF23)‐related hypophosphatemic rickets is observed in both genetic and acquired disorders. Various reports describe FGF23‐related hypophosphatemia with systemic lupus erythematosus (SLE), although FGF23‐related hypophosphatemia preceding the onset of SLE has never been described. Here, we report the case of a 9‐year‐old female with FGF23‐related hypophosphatemic rickets preceding the onset of SLE. The patient presented to us with arthralgia in the lower extremities and abnormality of gait lasting for 8 months. She was diagnosed with FGF23 hypophosphatemic rickets due to the presence of hypophosphatemic rickets symptoms and high serum levels of FGF23. Additional examination excluded hereditary diseases and tumor‐induced osteomalacia. Three months after diagnosis of FGF23‐related hypophosphatemic rickets, she developed nephritis and was diagnosed with SLE. She was treated with prednisolone, hemodialysis, and disease‐modifying drugs, as well as oral sodium phosphate to improve hypophosphatemia. Serum anti‐double‐stranded DNA antibody (dsDNAab) and plasma tumor necrosis factor‐α (TNF‐α) were elevated at FGF23‐related hypophosphatemic rickets diagnosis. During the clinical course, serum FGF23 correlated with dsDNAab and TNF‐α serum levels, which are involved in SLE disease activity. In this case, FGF23‐related hypophosphatemic rickets without hereditary diseases or tumor‐induced osteomalacia occurred before the appearance of juvenile SLE symptoms, and serum FGF23 represented disease activity in SLE.
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- 2024
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46. Long Time CO2 Storage Under Ambient Conditions in Isolated Voids of a Porous Coordination Network Facilitated by the 'Magic Door' Mechanism
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Terumasa Shimada, Pavel M. Usov, Yuki Wada, Hiroyoshi Ohtsu, Taku Watanabe, Kiyohiro Adachi, Daisuke Hashizume, Takaya Matsumoto, and Masaki Kawano
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carbon‐neutral society ,gas adsorption ,machine learning potential ,metal–organic frameworks ,X‐ray structure analysis ,Science - Abstract
Abstract A coordination network containing isolated pores without interconnecting channels is prepared from a tetrahedral ligand and copper(I) iodide. Despite the lack of accessibility, CO2 is selectively adsorbed into these pores at 298 K and then retained for more than one week while exposed to the atmosphere. The CO2 adsorption energy and diffusion mechanism throughout the network are simulated using Matlantis, which helps to rationalize the experimental results. CO2 enters the isolated voids through transient channels, termed “magic doors”, which can momentarily appear within the structure. Once inside the voids, CO2 remains locked in limiting its escape. This mechanism is facilitated by the flexibility of organic ligands and the pivot motion of cluster units. In situ powder X‐ray diffraction revealed that the crystal structure change is negligible before and after CO2 capture, unlike gate‐opening coordination networks. The uncovered CO2 sorption and retention ability paves the way for the design of sorbents based on isolated voids.
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- 2024
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47. ARCAD-Asia initiative: leveraging yesterday’s data for tomorrow
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Y. Takeda, T. Misumi, H. Bando, M. Suzuki, M. Wakabayashi, E. Oki, K. Yamazaki, Y. Kakeji, K. Shitara, M. Terashima, M. Raeisi, Y. Maehara, A. Ohtsu, T. Andre, A. de Gramont, Q. Shi, and T. Yoshino
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integrated database ,data sharing ,clinical study data ,no placebo initiative ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background: In clinical oncology, it is widely recognized that data sharing and the integration of completed clinical trials can promote research and development (R&D). The Foundation Aide et Recherche en Cancérologie Digestive (ARCAD) database project was initiated in Europe and the United States in 2006. Approximately 40 000 individual patient data (IPD) for metastatic colorectal cancer were collected and constructed as an integrated database. Materials and methods: ARCAD-Asia was launched in 2021 and has been actively collecting Asian clinical trials. In addition, ARCAD-Asian data were periodically transferred to the Mayo Clinic, and IPD was integrated into the ARCAD database. Finally, all data were shared with three data centers, ARCAD-Asia and ARCAD, located in Europe, the United States, and Japan. We have developed a reproducible and reliable data conversion procedure based on the methodology established by ARCAD. Results: From September 2021 to April 2023, 2318 IPD from four first-line, two second-line, and three third-line trials for metastatic colorectal cancer were integrated and stored in ARCAD-Asia. By autumn 2023, three more trials (1565 IPD) will be included, resulting in 12 trials (3883 IPD) in the Asia database. These are transferred and shared with ARCAD. After integrating Asian data, the ARCAD database contained 70 trials with ∼50 000 IPD. Conclusions: Based on our active collaboration, ARCAD-Asia was established, and a global integrated database was constructed. As a next step, we will continue to collect Asian IPD and expand the cancer types, leading to a more comprehensive and available global database.
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- 2023
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48. A case of hepatic dysfunction from crizotinib followed by treatment with entrectinib
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Takahito Mizuno, Satoshi Hagimoto, Takumi Umemura, Mariko Higashikawa, Takamasa Sakai, Kouichi Tanabe, Fumiko Ohtsu, Tetsuya Yamada, and Tomoki Kimura
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Small molecule tyrosine kinase inhibitor ,Crizotinib ,Entrectinib ,Hepatic dysfunction ,Increased creatinine phosphokinase ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background: Information regarding the safety of entrectinib for previously treated patients and patients with hepatic dysfunction is limited. This is the first case report of treatment modification attributable to hepatic dysfunction caused by crizotinib. Patients: A 76-year-old Japanese woman was referred to the Department of Respiratory Medicine and Allergy after a computed tomography (CT) scan at the time of thyroid surgery. The CT scan revealed an enlarged right upper lobe nodule. After careful examination, she was diagnosed with T3N2M1c stage IV ROS1-positive lung adenocarcinoma; therefore, crizotinib (500 mg/day) was prescribed. On day 861 of treatment, crizotinib was discontinued because of repeatedly observed increased aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels. Approximately 2 weeks after crizotinib was discontinued, treatment was restarted with entrectinib 600 mg/day. Conclusions: Entrectinib was prescribed because crizotinib caused hepatic dysfunction; however, the patient experienced grade 3 neutropenia and the creatinine phosphokinase (CPK) levels increased. After the dose reduction, she was able to continue treatment safely, without further worsening of the primary tumor or hepatic dysfunction. Therefore, entrectinib may be an option for patients who need treatment modification because of crizotinib-induced hepatic dysfunction. Increased CPK is a previously unknown adverse event occurring with entrectinib. This information is essential to risk management plans involving this drug. Further information regarding increased CPK and rhabdomyolysis occurring in patients treated with entrectinib is needed.
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- 2023
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49. Deep Reinforcement Learning-Based Channel Allocation for Wireless LANs with Graph Convolutional Networks
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Nakashima, Kota, Kamiya, Shotaro, Ohtsu, Kazuki, Yamamoto, Koji, Nishio, Takayuki, and Morikura, Masahiro
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Electrical Engineering and Systems Science - Signal Processing ,Computer Science - Machine Learning ,Computer Science - Networking and Internet Architecture - Abstract
Last year, IEEE 802.11 Extremely High Throughput Study Group (EHT Study Group) was established to initiate discussions on new IEEE 802.11 features. Coordinated control methods of the access points (APs) in the wireless local area networks (WLANs) are discussed in EHT Study Group. The present study proposes a deep reinforcement learning-based channel allocation scheme using graph convolutional networks (GCNs). As a deep reinforcement learning method, we use a well-known method double deep Q-network. In densely deployed WLANs, the number of the available topologies of APs is extremely high, and thus we extract the features of the topological structures based on GCNs. We apply GCNs to a contention graph where APs within their carrier sensing ranges are connected to extract the features of carrier sensing relationships. Additionally, to improve the learning speed especially in an early stage of learning, we employ a game theory-based method to collect the training data independently of the neural network model. The simulation results indicate that the proposed method can appropriately control the channels when compared to extant methods.
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- 2019
50. Poor association between dihydropyrimidine dehydrogenase (DPYD) genotype and fluoropyrimidine‐induced toxicity in an Asian population
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Masashi Kanai, Takahisa Kawaguchi, Masahito Kotaka, Dai Manaka, Junichi Hasegawa, Akinori Takagane, Yoshinori Munemoto, Takeshi Kato, Tetsuya Eto, Tetsuo Touyama, Takanori Matsui, Katsunori Shinozaki, Shigemi Matsumoto, Tsunekazu Mizushima, Masaki Mori, Junichi Sakamoto, Atsushi Ohtsu, Takayuki Yoshino, Shigetoyo Saji, and Fumihiko Matsuda
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Asian population ,DPYD ,fluoropyrimidine ,genotyping ,toxicity ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Objective Dihydropyrimidine dehydrogenase (DPYD) genotype is closely associated with fluoropyrimidine (FP)‐induced toxicities in Caucasian population and European Medicines Agency now recommends DPYD genotype‐based FP dosing strategy. Patients and Methods The current study aimed to investigate their impact on FP‐related toxicities in an Asian population using genome‐wide association study (GWAS) data set from 1364 patients with colon cancer. Results Among 82 variants registered in the Clinical Pharmacogenetics Implementation Consortium, 74 DPYD variants were directly genotyped in GWAS cohort; however, only 7 nonsynonymous DPYD variants (CPIC variants) were identified and none of the four recurrent DPYD variants (DPYD*2A, c.2846A>T, c.1679T>G, c.1236G>A) were included. Seven CPIC variants were investigated for their association with the incidence of FP‐related toxicities; however, none of these variants revealed a significant correlation with FP‐related toxicities. Conclusion These data suggested that the DPYD genotype registered in CPIC plays a minor role in FP‐related toxicities in an Asian population.
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- 2023
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