167 results on '"Hideki Maki"'
Search Results
2. Efficacy of intraoperative irrigation with artificial cerebrospinal fluid in chronic subdural hematoma surgery: study protocol for a multicenter randomized controlled trial
- Author
-
Yoshitaka Nagashima, Yoshio Araki, Kazuki Nishida, Shunichiro Kuramitsu, Kenichi Wakabayashi, Shinji Shimato, Takeshi Kinkori, Toshihisa Nishizawa, Takahisa Kano, Toshinori Hasegawa, Atsushi Noda, Kenko Maeda, Yu Yamamoto, Osamu Suzuki, Naoki Koketsu, Takeshi Okada, Masashige Iwasaki, Kiyo Nakabayashi, Shigeru Fujitani, Hideki Maki, Yachiyo Kuwatsuka, Masahiro Nishihori, Takafumi Tanei, Tomohide Nishikawa, Yusuke Nishimura, Ryuta Saito, and Tokai Neurosurgical disorder Research Group CSDH Study investigators
- Subjects
Artificial cerebrospinal fluid ,Chronic subdural hematoma ,Irrigation fluid ,Recurrence ,Surgical evacuation ,Medicine (General) ,R5-920 - Abstract
Abstract Background The surgical techniques for treatment of chronic subdural hematoma (CSDH), a common neurosurgical condition, have been discussed in a lot of clinical literature. However, the recurrence proportion after CSDH surgery remains high, ranging from 10 to 20%. The standard surgical procedure for CSDH involves a craniostomy to evacuate the hematoma, but irrigating the hematoma cavity during the procedure is debatable. The authors hypothesized that the choice of irrigation fluid might be a key factor affecting the outcomes of surgery. This multicenter randomized controlled trial aims to investigate whether intraoperative irrigation using artificial cerebrospinal fluid (ACF) followed by the placement of a subdural drain would yield superior results compared to the placement of a subdural drain alone for CSDH. Methods The study will be conducted across 19 neurosurgical departments in Japan. The 1186 eligible patients will be randomly allocated to two groups: irrigation using ACF or not. In either group, a subdural drain is to be placed for at least 12 h postoperatively. Similar to what was done in previous studies, we set the proportion of patients that meet the criteria for ipsilateral reoperation at 7% in the irrigation group and 12% in the non-irrigation group. The primary endpoint is the proportion of patients who meet the criteria for ipsilateral reoperation within 6 months of surgery (clinical worsening of symptoms and increased hematoma on imaging compared with the postoperative state). The secondary endpoints are the proportion of reoperations within 6 months, the proportion being stratified by preoperative hematoma architecture by computed tomography (CT) scan, neurological symptoms, patient condition, mortality at 6 months, complications associated with surgery, length of hospital stay from surgery to discharge, and time of the surgical procedure. Discussion We present the study protocol for a multicenter randomized controlled trial to investigate our hypothesis that intraoperative irrigation with ACF reduces the recurrence proportion after the removal of chronic subdural hematomas compared with no irrigation. Trial registration ClinicalTrials.gov jRCT1041220124. Registered on January 13, 2023.
- Published
- 2024
- Full Text
- View/download PDF
3. Comparison of Various Nitrogen and Water Dual Stress Effects for Predicting Relative Water Content and Nitrogen Content in Maize Plants through Hyperspectral Imaging
- Author
-
Hideki Maki, Valerie Lynch, Dongdong Ma, Mitchell R. Tuinstra, Masanori Yamasaki, and Jian Jin
- Subjects
nitrogen treatment ,drought stress ,hyperspectral camera ,plant phenotyping ,partial least squares regression ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Water and nitrogen (N) are major factors in plant growth and agricultural production. However, these are often confounded and produce overlapping symptoms of plant stress. The objective of this study is to verify whether the different levels of N treatment influence water status prediction and vice versa with hyperspectral modeling. We cultivated 108 maize plants in a greenhouse under three-level N treatments in combination with three-level water treatments. Hyperspectral images were collected from those plants, then Relative Water Content (RWC), as well as N content, was measured as ground truth. A Partial Least Squares (PLS) regression analysis was used to build prediction models for RWC and N content. Then, their accuracy and robustness were compared according to the different N treatment datasets and different water treatment datasets, respectively. The results demonstrated that the PLS prediction for RWC using hyperspectral data was impacted by N stress difference (Ratio of Performance to Deviation; RPD from 0.87 to 2.27). Furthermore, the dataset with water and N dual stresses improved model accuracy and robustness (RPD from 1.69 to 2.64). Conversely, the PLS prediction for N content was found to be robust against water stress difference (RPD from 2.33 to 3.06). In conclusion, we suggest that water and N dual treatments can be helpful in building models with wide applicability and high accuracy for evaluating plant water status such as RWC.
- Published
- 2023
- Full Text
- View/download PDF
4. SPECT Imaging of P. aeruginosa Infection in Mice Using 123I-BMIPP
- Author
-
Yuri Nishiyama, Asuka Mizutani, Masato Kobayashi, Yuka Muranaka, Kakeru Sato, Hideki Maki, and Keiichi Kawai
- Subjects
Pseudomonas aeruginosa ,SPECT ,123I-BMIPP ,difficult to treat ,noninvasive ,Pharmacy and materia medica ,RS1-441 - Abstract
Pseudomonas aeruginosa infection is an infectious disease that must be controlled because it becomes chronic and difficult to treat, owing to its unique system of toxin production/injection and elimination of other bacteria. Here, we noninvasively monitored P. aeruginosa using single-photon emission computed tomography (SPECT) imaging. Determining the amount and localization of the P. aeruginosa will enable making faster clinical diagnoses and selecting the most appropriate therapeutic agents and methods. Nonclinically, this information can be used for imaging in combination with biofilms and toxin probes and will be useful for discovering drugs targeting P. aeruginosa. To study P. aeruginosa accumulation, we conducted in vitro and in vivo studies using iodine-123 β-methyl-p-iodophenyl-pentadecanoic acid (123I-BMIPP), which we previously reported using for Escherichia coli. In vitro, 123I-BMIPP accumulated in P. aeruginosa by being taken up into the bacteria and adsorbing to the bacterial surface. In vivo, 123I-BMIPP accumulated significantly more in infected sites than in noninfected sites and could be quantified by SPECT. These results suggest that 123I-BMIPP can be used as a probe for P. aeruginosa for SPECT. Establishing a noninvasive monitoring method using SPECT will allow further progress in studying P. aeruginosa.
- Published
- 2024
- Full Text
- View/download PDF
5. Neural underpinning of Japanese particle processing in non-native speakers
- Author
-
Chise Kasai, Motofumi Sumiya, Takahiko Koike, Takaaki Yoshimoto, Hideki Maki, and Norihiro Sadato
- Subjects
Medicine ,Science - Abstract
Abstract Grammar acquisition by non-native learners (L2) is typically less successful and may produce fundamentally different grammatical systems than that by native speakers (L1). The neural representation of grammatical processing between L1 and L2 speakers remains controversial. We hypothesized that working memory is the primary source of L1/L2 differences, by considering working memory within the predictive coding account, which models grammatical processes as higher-level neuronal representations of cortical hierarchies, generating predictions (forward model) of lower-level representations. A functional MRI study was conducted with L1 Japanese speakers and highly proficient Japanese learners requiring oral production of grammatically correct Japanese particles. We assumed selecting proper particles requires forward model-dependent processes of working memory as their functions are highly context-dependent. As a control, participants read out a visually designated mora indicated by underlining. Particle selection by L1/L2 groups commonly activated the bilateral inferior frontal gyrus/insula, pre-supplementary motor area, left caudate, middle temporal gyrus, and right cerebellum, which constituted the core linguistic production system. In contrast, the left inferior frontal sulcus, known as the neural substrate of verbal working memory, showed more prominent activation in L2 than in L1. Thus, the working memory process causes L1/L2 differences even in highly proficient L2 learners.
- Published
- 2022
- Full Text
- View/download PDF
6. Reduced susceptibility mechanism to cefiderocol, a siderophore cephalosporin, among clinical isolates from a global surveillance programme (SIDERO-WT-2014)
- Author
-
Naoki Kohira, Meredith A. Hackel, Yoshino Ishioka, Miho Kuroiwa, Daniel F. Sahm, Takafumi Sato, Hideki Maki, and Yoshinori Yamano
- Subjects
Cefiderocol ,Siderophore cephalosporin ,Gram-negative bacilli ,PER-type β-lactamase ,Cefiderocol non-susceptible ,Microbiology ,QR1-502 - Abstract
Objective: To investigate possible mechanistic factors to explain cefiderocol (CFDC) non-susceptibility, we characterized 38 clinical isolates with a CFDC minimum inhibitory concentration (MIC) of >4 μg/mL from a multi-national surveillance study. Methods: The MIC measurement in the presence of β-lactamase inhibitors and whole genome sequencing were performed. Results: The MIC decrease of CFDC by β-lactamase inhibitors was observed against all of the test isolates. Among the 38 isolates, NDM and PER genes were observed in 5 and 25 isolates, respectively. No other β-lactamases responsible for high MIC were identified in the other eight isolates. The MIC of CDFC against Escherichia coli isogenic strains introduced with NDM and PER β-lactamase increased by ≥16-fold, suggesting the contribution of NDM and PER to the non-susceptibility to CFDC. Against NDM producers, a ≥8-fold MIC increase was observed only when both serine- and metallo-type β-lactamase inhibitors were added. In addition, many of the PER or NDM producers remained susceptible to CFDC. These results suggested that the presence of only NDM or PER would not lead to non-susceptibility to CFDC and that multiple factors would be related to CFDC resistance. Conclusion: Multiple factors including NDM and PER could be related to reduced susceptibility to CFDC.
- Published
- 2020
- Full Text
- View/download PDF
7. Anti-PcrV titers in non-cystic fibrosis patients with Pseudomonas aeruginosa respiratory tract infection
- Author
-
Kentaro Nagaoka, Yu Yamashita, Hirokazu Kimura, Hiroki Kimura, Masaru Suzuki, Tatsuya Fukumoto, Kasumi Hayasaka, Mari Yoshida, Takafumi Hara, Hideki Maki, Tomoyuki Ohkawa, and Satoshi Konno
- Subjects
Infectious and parasitic diseases ,RC109-216 - Abstract
Objective: The epidemiology and role of the anti-PcrV titer in non-cystic fibrosis patients with Pseudomonas aeruginosa airway tract infections is not fully understood. This study was performed to compare the anti-PcrV titers of patients with and without P. aeruginosa respiratory tract infections. Methods: This prospective cohort study was conducted at Hokkaido University Hospital in Japan. Participants had blood and sputum specimens collected on admission. They were divided into two groups based on their sputum culture results. Those with a P. aeruginosa infection were assigned to the P. aeruginosa (PA) group and those without a P. aeruginosa infection were assigned to the non-PA group. Serum anti-PcrV titers were measured using a validated ELISA. Results: Of the 44 participants, 15 were assigned to the PA group and 29 were assigned to the non-PA group. In the PA group, 10/15 participants (66.7%) had an anti-PcrV titer >1000 ng/ml compared to 3/29 participants (10.3%) in the non-PA group (p
- Published
- 2019
- Full Text
- View/download PDF
8. 123I-BMIPP, a Radiopharmaceutical for Myocardial Fatty Acid Metabolism Scintigraphy, Could Be Utilized in Bacterial Infection Imaging
- Author
-
Yuka Muranaka, Asuka Mizutani, Masato Kobayashi, Koya Nakamoto, Miki Matsue, Fumika Takagi, Kenichi Okazaki, Kodai Nishi, Kana Yamazaki, Ryuichi Nishii, Naoto Shikano, Shigefumi Okamoto, Hideki Maki, and Keiichi Kawai
- Subjects
123I-BMIPP ,SPECT ,nuclear medicine imaging ,bacterial infection ,bacterial imaging ,Pharmacy and materia medica ,RS1-441 - Abstract
In this study, we evaluated the use of 15-(4-123I-iodophenyl)-3(R,S)-methylpentadecanoic acid (123I-BMIPP) to visualize fatty acid metabolism in bacteria for bacterial infection imaging. We found that 123I-BMIPP, which is used for fatty acid metabolism scintigraphy in Japan, accumulated markedly in Escherichia coli EC-14 similar to 18F-FDG, which has previously been studied for bacterial imaging. To elucidate the underlying mechanism, we evaluated changes in 123I-BMIPP accumulation under low-temperature conditions and in the presence of a CD36 inhibitor. The uptake of 123I-BMIPP by EC-14 was mediated via the CD36-like fatty-acid-transporting membrane protein and accumulated by fatty acid metabolism. In model mice infected with EC-14, the biological distribution and whole-body imaging were assessed using 123I-BMIPP and 18F-FDG. The 123I-BMIPP biodistribution study showed that, 8 h after infection, the ratio of 123I-BMIPP accumulated in infected muscle to that in control muscle was 1.31 at 60 min after 123I-BMIPP injection. In whole-body imaging 1.5 h after 123I-BMIPP administration and 9.5 h after infection, infected muscle exhibited a 1.33-times higher contrast than non-infected muscle. Thus, 123I-BMIPP shows potential for visualizing fatty acid metabolism of bacteria for imaging bacterial infections.
- Published
- 2022
- Full Text
- View/download PDF
9. Multi-Species Prediction of Physiological Traits with Hyperspectral Modeling
- Author
-
Meng-Yang Lin, Valerie Lynch, Dongdong Ma, Hideki Maki, Jian Jin, and Mitchell Tuinstra
- Subjects
abiotic stress ,corn ,ecophysiology ,high-throughput phenotyping ,machine learning ,nitrogen content ,Botany ,QK1-989 - Abstract
Lack of high-throughput phenotyping is a bottleneck to breeding for abiotic stress tolerance in crop plants. Efficient and non-destructive hyperspectral imaging can quantify plant physiological traits under abiotic stresses; however, prediction models generally are developed for few genotypes of one species, limiting the broader applications of this technology. Therefore, the objective of this research was to explore the possibility of developing cross-species models to predict physiological traits (relative water content and nitrogen content) based on hyperspectral reflectance through partial least square regression for three genotypes of sorghum (Sorghum bicolor (L.) Moench) and six genotypes of corn (Zea mays L.) under varying water and nitrogen treatments. Multi-species models were predictive for the relative water content of sorghum and corn (R2 = 0.809), as well as for the nitrogen content of sorghum and corn (R2 = 0.637). Reflectances at 506, 535, 583, 627, 652, 694, 722, and 964 nm were responsive to changes in the relative water content, while the reflectances at 486, 521, 625, 680, 699, and 754 nm were responsive to changes in the nitrogen content. High-throughput hyperspectral imaging can be used to predict physiological status of plants across genotypes and some similar species with acceptable accuracy.
- Published
- 2022
- Full Text
- View/download PDF
10. 30-minute postload plasma glucose levels during an oral glucose tolerance test predict the risk of future type 2 diabetes: the Hisayama Study
- Author
-
Takanori Honda, Mao Shibata, Satoko Sakata, Masahito Yoshinari, Mayu Higashioka, Takanori Teramoto, Hideki Maki, and Shozo Nishimoto
- Subjects
Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
Introduction To investigate the associations of 30 min postload plasma glucose (30 mPG) levels during an oral glucose tolerance test (OGTT) with the risk of future diabetes in a general Japanese population.Research design and methods A total of 2957 Japanese community-dwelling residents without diabetes, aged 40–79 years, participated in the examinations in 2007 and 2008 (participation rate, 77.1%). Among them, 2162 subjects who received 75 g OGTT in a fasting state with measurements of plasma glucose level at 0, 30, and 120 min were followed up for 7 years (2007–2014). Cox’s proportional hazards model was used to estimate HRs and their 95% CIs of each index for the development of type 2 diabetes using continuous variables and quartiles with adjustment for traditional risk factors. The influence of 30 mPG on the predictive ability was estimated with Harrell’s C-statistics, integrated discrimination improvement (IDI), and the continuous net reclassification index (cNRI).Results During follow-up, 275 subjects experienced type 2 diabetes. Elevated 30 mPG levels were significantly associated with increased risk of developing diabetes (p
- Published
- 2020
- Full Text
- View/download PDF
11. Modeling of Environmental Impacts on Aerial Hyperspectral Images for Corn Plant Phenotyping
- Author
-
Dongdong Ma, Tanzeel U. Rehman, Libo Zhang, Hideki Maki, Mitchell R. Tuinstra, and Jian Jin
- Subjects
aerial hyperspectral images ,plant phenotyping features ,environment variation ,time series decomposition ,artificial neural networks ,Science - Abstract
Aerial imaging technologies have been widely applied in agricultural plant remote sensing. However, an as yet unexplored challenge with field imaging is that the environmental conditions, such as sun angle, cloud coverage, temperature, and so on, can significantly alter plant appearance and thus affect the imaging sensor’s accuracy toward extracting plant feature measurements. These image alterations result from the complicated interaction between the real-time environments and plants. Analysis of these impacts requires continuous monitoring of the changes through various environmental conditions, which has been difficult with current aerial remote sensing systems. This paper aimed to propose a modeling method to comprehensively understand and model the environmental influences on hyperspectral imaging data. In 2019, a fixed hyperspectral imaging gantry was constructed in Purdue University’s research farm, and over 8000 repetitive images of the same corn field were taken with a 2.5 min interval for 31 days. Time-tagged local environment data, including solar zenith angle, solar irradiation, temperature, wind speed, and so on, were also recorded during the imaging time. The images were processed for phenotyping data, and the time series decomposition method was applied to extract the phenotyping data variation caused by the changing environments. An artificial neural network (ANN) was then built to model the relationship between the phenotyping data variation and environmental changes. The ANN model was able to accurately predict the environmental effects in remote sensing results, and thus could be used to effectively eliminate the environment-induced variation in the phenotyping features. The test of the normalized difference vegetation index (NDVI) calculated from the hyperspectral images showed that variance in NDVI was reduced by 79%. A similar performance was confirmed with the relative water content (RWC) predictions. Therefore, this modeling method shows great potential for application in aerial remote sensing applications in agriculture, to significantly improve the imaging quality by effectively eliminating the effects from the changing environmental conditions.
- Published
- 2021
- Full Text
- View/download PDF
12. Modeling of Diurnal Changing Patterns in Airborne Crop Remote Sensing Images
- Author
-
Dongdong Ma, Tanzeel U. Rehman, Libo Zhang, Hideki Maki, Mitchell R. Tuinstra, and Jian Jin
- Subjects
hyperspectral images ,diurnal variability ,image-derived phenotyping features ,imaging window ,remote sensing ,Science - Abstract
Airborne remote sensing technologies have been widely applied in field crop phenotyping. However, the quality of current remote sensing data suffers from significant diurnal variances. The severity of the diurnal issue has been reported in various plant phenotyping studies over the last four decades, but there are limited studies on the modeling of the diurnal changing patterns that allow people to precisely predict the level of diurnal impacts. In order to comprehensively investigate the diurnal variability, it is necessary to collect time series field images with very high sampling frequencies, which has been difficult. In 2019, Purdue agricultural (Ag) engineers deployed their first field visible to near infrared (VNIR) hyperspectral gantry platform, which is capable of repetitively imaging the same field plots every 2.5 min. A total of 8631 hyperspectral images of the same field were collected for two genotypes of corn plants from the vegetative stage V4 to the reproductive stage R1 in the 2019 growing season. The analysis of these images showed that although the diurnal variability is very significant for almost all the image-derived phenotyping features, the diurnal changes follow stable patterns. This makes it possible to predict the imaging drifts by modeling the changing patterns. This paper reports detailed diurnal changing patterns for several selected plant phenotyping features such as Normalized Difference Vegetation Index (NDVI), Relative Water Content (RWC), and single spectrum bands. For example, NDVI showed a repeatable V-shaped diurnal pattern, which linearly drops by 0.012 per hour before the highest sun angle and increases thereafter by 0.010 per hour. The different diurnal changing patterns in different nitrogen stress treatments, genotypes and leaf stages were also compared and discussed. With the modeling results of this work, Ag remote sensing users will be able to more precisely estimate the deviation/change of crop feature predictions caused by the specific imaging time of the day. This will help people to more confidently decide on the acceptable imaging time window during a day. It can also be used to calibrate/compensate the remote sensing result against the time effect.
- Published
- 2021
- Full Text
- View/download PDF
13. Screening for FtsZ Dimerization Inhibitors Using Fluorescence Cross-Correlation Spectroscopy and Surface Resonance Plasmon Analysis.
- Author
-
Shintaro Mikuni, Kota Kodama, Akira Sasaki, Naoki Kohira, Hideki Maki, Masaharu Munetomo, Katsumi Maenaka, and Masataka Kinjo
- Subjects
Medicine ,Science - Abstract
FtsZ is an attractive target for antibiotic research because it is an essential bacterial cell division protein that polymerizes in a GTP-dependent manner. To find the seed chemical structure, we established a high-throughput, quantitative screening method combining fluorescence cross-correlation spectroscopy (FCCS) and surface plasmon resonance (SPR). As a new concept for the application of FCCS to polymerization-prone protein, Staphylococcus aureus FtsZ was fragmented into the N-terminal and C-terminal, which were fused with GFP and mCherry (red fluorescent protein), respectively. By this fragmentation, the GTP-dependent head-to-tail dimerization of each fluorescent labeled fragment of FtsZ could be observed, and the inhibitory processes of chemicals could be monitored by FCCS. In the first round of screening by FCCS, 28 candidates were quantitatively and statistically selected from 495 chemicals determined by in silico screening. Subsequently, in the second round of screening by FCCS, 71 candidates were also chosen from 888 chemicals selected via an in silico structural similarity search of the chemicals screened in the first round of screening. Moreover, the dissociation constants between the highest inhibitory chemicals and Staphylococcus aureus FtsZ were determined by SPR. Finally, by measuring the minimum inhibitory concentration, it was confirmed that the screened chemical had antibacterial activity against Staphylococcus aureus, including methicillin-resistant Staphylococcus aureus (MRSA).
- Published
- 2015
- Full Text
- View/download PDF
14. Mechanism of case processing in the brain: an fMRI study.
- Author
-
Satoru Yokoyama, Hideki Maki, Yosuke Hashimoto, Masahiko Toma, and Ryuta Kawashima
- Subjects
Medicine ,Science - Abstract
In sentence comprehension research, the case system, which is one of the subsystems of the language processing system, has been assumed to play a crucial role in signifying relationships in sentences between noun phrases (NPs) and other elements, such as verbs, prepositions, nouns, and tense. However, so far, less attention has been paid to the question of how cases are processed in our brain. To this end, the current study used fMRI and scanned the brain activity of 15 native English speakers during an English-case processing task. The results showed that, while the processing of all cases activates the left inferior frontal gyrus and posterior part of the middle temporal gyrus, genitive case processing activates these two regions more than nominative and accusative case processing. Since the effect of the difference in behavioral performance among these three cases is excluded from brain activation data, the observed different brain activations would be due to the different processing patterns among the cases, indicating that cases are processed differently in our brains. The different brain activations between genitive case processing and nominative/accusative case processing may be due to the difference in structural complexity between them.
- Published
- 2012
- Full Text
- View/download PDF
15. Greenhouse environment modeling and simulation for microclimate control.
- Author
-
Dongdong Ma, Neal R. Carpenter, Hideki Maki, Tanzeel U. Rehman, Mitchell R. Tuinstra, and Jian Jin
- Published
- 2019
- Full Text
- View/download PDF
16. Optimized angles of the swing hyperspectral imaging system for single corn plant.
- Author
-
Libo Zhang 0005, Hideki Maki, Dongdong Ma, José A. Sánchez-Gallego, Michael V. Mickelbart, Liangju Wang, Tanzeel U. Rehman, and Jian Jin
- Published
- 2019
- Full Text
- View/download PDF
17. Butterfly needle tap and suction (BTS) technique: a treatment for recurrent chronic subdural hematoma after burr hole craniostomy
- Author
-
Shun Yamamoto, Yoshitaka Nagashima, Hideki Maki, Yusuke Nishimura, Yoshio Araki, Masahiro Nishihori, Tomoyuki Noda, Tasuku Imai, Teppei Kawabata, Masahiro Ueno, Yasumasa Nishida, and Ryuta Saito
- Subjects
Surgery ,Neurology (clinical) - Published
- 2023
18. Removal of greenhouse microclimate heterogeneity with conveyor system for indoor phenotyping.
- Author
-
Dongdong Ma, Neal R. Carpenter, Suraj Amatya, Hideki Maki, Liangju Wang, Libo Zhang 0005, Samantha Neeno, Mitchell R. Tuinstra, and Jian Jin
- Published
- 2019
- Full Text
- View/download PDF
19. Automated leaf movement tracking in time-lapse imaging for plant phenotyping.
- Author
-
Tanzeel U. Rehman, Libo Zhang 0005, Liangju Wang, Dongdong Ma, Hideki Maki, José A. Sánchez-Gallego, Michael V. Mickelbart, and Jian Jin
- Published
- 2020
- Full Text
- View/download PDF
20. A surgical case of severe spinal epidural hematoma misdiagnosed as acute ischemic stroke treated by a recombinant tissue-type plasminogen activator
- Author
-
Toshiaki Hirose, Tasuku Imai, Yasumasa Nishida, Shun Yamamoto, Takeki Ito, Taku Hiramatsu, Teppei Kawabata, Shigeki Tsuboi, Tomoyuki Noda, and Hideki Maki
- Subjects
General Medicine - Published
- 2022
21. Acute cerebral infarction due to infectious endocarditis diagnosed based on pathological and bacteriological examinations of emboli retrieved by mechanical thrombectomy: a case report
- Author
-
Hiroyuki Kato, Toshiaki Hirose, Masaki Kondo, Tasuku Imai, Teppei Kawabata, Hideki Maki, and Tomoyuki Noda
- Subjects
Mechanical thrombectomy ,medicine.medical_specialty ,business.industry ,Acute cerebral infarction ,Medicine ,Endocarditis ,business ,medicine.disease ,Pathological ,Surgery - Published
- 2021
22. A case of meningitis with hemorrhagic stroke caused by Neisseria meningitidis
- Author
-
Hideki Maki, Taku Hiramatsu, Toshiaki Hirose, Shun Yamamoto, Tomoyuki Noda, Teppei Kawabata, and Tasuku Imai
- Subjects
business.industry ,Neisseria meningitidis ,medicine ,Bacterial meningitis ,medicine.disease ,business ,medicine.disease_cause ,Meningitis ,Stroke ,Microbiology - Published
- 2021
23. Application of non-linear partial least squares analysis on prediction of biomass of maize plants using hyperspectral images
- Author
-
Liangju Wang, Libo Zhang, Jian Jin, Dongdong Ma, Samantha Neeno, and Hideki Maki
- Subjects
Multivariable calculus ,010401 analytical chemistry ,Linear model ,Soil Science ,Hyperspectral imaging ,Biomass ,Regression analysis ,04 agricultural and veterinary sciences ,01 natural sciences ,0104 chemical sciences ,Control and Systems Engineering ,Kernel (statistics) ,040103 agronomy & agriculture ,Feature (machine learning) ,0401 agriculture, forestry, and fisheries ,Radial basis function ,Biological system ,Agronomy and Crop Science ,Food Science ,Mathematics - Abstract
With the application of hyperspectral imaging systems on high-throughput plant phenotyping, multivariable spectral data modelling methods have been proposed to predict plant physiological features such as biomass. However, most presented modelling methods are linear models such as the regression model between projected leaf area and plant biomass, which cannot accurately reflect some non-linear relationships between hyperspectral imaging information and the phenomes to be predicted. Therefore, it is important to develop a prediction model for plant physiological features that fully utilises the information in plant hyperspectral images. In this paper, a non-linear modelling method known as kernel partial least squares (KPLS) was investigated to improve the prediction performance of maize (US corn) biomass. The main idea of KPLS is mapping the original input features into higher dimensional feature spaces before obtaining the principle components for a standard PLS model. In the new mapping spaces, the original, nonlinear inputs may exhibit linear patterns with different kernel functions. This method was tested in a greenhouse assay containing 102 maize plants, which were subjected to a combination of three water treatments and two nitrogen treatments at three different growth stages. KPLS methods were successfully applied on the collected hyperspectral images. The results showed that compared with conventional linear models, statistics including R2 of KPLS with radial basis function (RBF) kernel had improved accuracy (R2 = 0.924). We expect that besides plant biomass, this new non-linear KPLS model could improve the quality of estimation of other plant features as well.
- Published
- 2020
24. Stalobacin: Discovery of Novel Lipopeptide Antibiotics with Potent Antibacterial Activity against Multidrug-Resistant Bacteria
- Author
-
Miki Takemura, Keisuke Matsushima, Hideki Maki, Kouhei Matsui, Junko Kikuchi, Taichi Ueda, Yukiko Kan, Iori Kozono, and Kazuyuki Minagawa
- Subjects
medicine.drug_class ,Stereochemistry ,Antibiotics ,Drug Evaluation, Preclinical ,Microbial Sensitivity Tests ,Gram-Positive Bacteria ,01 natural sciences ,Bacterial cell structure ,Lipopeptides ,03 medical and health sciences ,chemistry.chemical_compound ,Drug Resistance, Multiple, Bacterial ,Gram-Negative Bacteria ,Drug Discovery ,medicine ,Peptide sequence ,030304 developmental biology ,chemistry.chemical_classification ,0303 health sciences ,biology ,Lipoglycopeptides ,Lipopeptide ,biology.organism_classification ,Anti-Bacterial Agents ,0104 chemical sciences ,Amino acid ,010404 medicinal & biomolecular chemistry ,Aminoglycosides ,chemistry ,Linezolid ,Molecular Medicine ,Antibacterial activity ,Bacteria - Abstract
A novel lipopeptide antibiotic, stalobacin I (1), was discovered from a culture broth of an unidentified Gram-negative bacterium. Stalobacin I (1) had a unique chemical architecture composed of an upper and a lower half peptide sequence, which were linked via a hemiaminal methylene moiety. The sequence of 1 contained an unusual amino acid, carnosadine, 3,4-dihydroxyariginine, 3-hydroxyisoleucine, and 3-hydroxyaspartic acid, and a novel cyclopropyl fatty acid. The antibacterial activity of 1 against a broad range of drug-resistant Gram-positive bacteria was much stronger than those of "last resort" antibiotics such as vancomycin, linezolid, and telavancin (MIC 0.004-0.016 μg/mL). Furthermore, compound 1 induced a characteristic morphological change in Gram-positive and Gram-negative strains by inflating the bacterial cell body. The absolute configuration of a cyclopropyl amino acid, carnosadine, was determined by the synthetic study of its stereoisomers, which was an essential component for the strong activity of 1.
- Published
- 2020
25. Neural Underpinning of Japanese Particle Processing in Non-native Speakers
- Author
-
Chise Kasai, Motofumi Sumiya, Takahiko Koike, Takaaki Yoshimoto, Hideki Maki, and Norihiro Sadato
- Subjects
Multidisciplinary ,Japan ,Reading ,Memory ,Humans ,Multilingualism ,Magnetic Resonance Imaging - Abstract
Grammar acquisition by non-native learners (L2) is typically less successful and may produce fundamentally different grammatical systems than that by native speakers (L1). The neural representation of grammatical processing between L1 and L2 speakers remains controversial. We hypothesized that working memory is the primary source of L1/L2 differences, and operationalized working memory is an active inference within the predictive coding account, which models grammatical processes as higher-level neuronal representations of cortical hierarchies, generating predictions (forward model) of lower-level representations. A functional MRI study was conducted with L1 Japanese speakers and highly proficient Japanese learners requiring oral production of grammatically correct Japanese particles. Selecting proper particles requires forward model-dependent active inference as their functions are highly context-dependent. As a control, participants read out a visually designated mora indicated by underlining. Particle selection by L1/L2 groups commonly activated the bilateral inferior frontal gyrus/insula, pre-supplementary motor area, left caudate, middle temporal gyrus, and right cerebellum, which constituted the core linguistic production system. In contrast, the left inferior frontal sulcus, known as the neural substrate of verbal working memory, showed more prominent activation in L2 than in L1. Thus, the active inference process causes L1/L2 differences even in highly proficient L2 learners.
- Published
- 2021
26. Identification of Thiazoyl Guanidine Derivatives as Novel Antifungal Agents Inhibiting Ergosterol Biosynthesis for Treatment of Invasive Fungal Infections
- Author
-
Hideki Maki, Chiaki Kimura, Eri Mizusawa, Akira Naito, Makoto Kawai, Issei Kato, Noriyasu Kondo, Yuuta Ukai, Kumi Hashimoto, and Kohei Nozu
- Subjects
Antifungal ,Antifungal Agents ,medicine.drug_class ,Microbial Sensitivity Tests ,Pharmacology ,01 natural sciences ,Aspergillus fumigatus ,03 medical and health sciences ,chemistry.chemical_compound ,Structure-Activity Relationship ,Pharmacokinetics ,Ergosterol ,Drug Discovery ,medicine ,Humans ,Guanidine ,030304 developmental biology ,Voriconazole ,chemistry.chemical_classification ,0303 health sciences ,biology ,Dose-Response Relationship, Drug ,Molecular Structure ,biology.organism_classification ,0104 chemical sciences ,010404 medicinal & biomolecular chemistry ,Thiazoles ,Enzyme ,chemistry ,Lipophilicity ,Molecular Medicine ,Ergosterol biosynthesis ,Invasive Fungal Infections ,medicine.drug - Abstract
Invasive fungal infections (IFIs) are fatal infections, but treatment options are limited. The clinical efficacies of existing drugs are unsatisfactory because of side effects, drug-drug interaction, unfavorable pharmacokinetic profiles, and emerging drug-resistant fungi. Therefore, the development of antifungal drugs with a new mechanism is an urgent issue. Herein, we report novel aryl guanidine antifungal agents, which inhibit a novel target enzyme in the ergosterol biosynthesis pathway. Structure-activity relationship development and property optimization by reducing lipophilicity led to the discovery of 6h, which showed potent antifungal activity against Aspergillus fumigatus in the presence of serum, improved metabolic stability, and PK properties. In the murine systemic A. fumigatus infection model, 6h exhibited antifungal efficacy equivalent to voriconazole (1e). Furthermore, owing to the inhibition of a novel target in the ergosterol biosynthesis pathway, 6h showed antifungal activity against azole-resistant A. fumigatus.
- Published
- 2021
27. Discovery of 2-Sulfinyl-Diazabicyclooctane Derivatives, Potential Oral β-Lactamase Inhibitors for Infections Caused by Serine β-Lactamase-Producing Enterobacterales
- Author
-
Hideki Maki, Kenji Yamawaki, Toshiaki Aoki, Daiki Nagamatsu, Ryosuke Watari, Motohiro Fujiu, Hiroki Kusano, Yuya Hirakawa, Kazuo Komano, Sachi Kanazawa, Emi Kashiwagi, Naoki Kohira, Satoru Shibuya, Soichiro Sato, Tomoyuki Kawachi, Jun Sato, and Katsuki Yokoo
- Subjects
medicine.drug_class ,Cephalosporin ,Microbial Sensitivity Tests ,01 natural sciences ,beta-Lactamases ,Microbiology ,Serine ,03 medical and health sciences ,Cyclooctanes ,Structure-Activity Relationship ,Enterobacteriaceae ,In vivo ,Clavulanic acid ,Drug Discovery ,medicine ,Ceftibuten ,030304 developmental biology ,0303 health sciences ,biology ,Dose-Response Relationship, Drug ,Molecular Structure ,Chemistry ,Sulbactam ,biology.organism_classification ,0104 chemical sciences ,Anti-Bacterial Agents ,010404 medicinal & biomolecular chemistry ,Molecular Medicine ,beta-Lactamase Inhibitors ,Azabicyclo Compounds ,Bacteria ,medicine.drug - Abstract
Coadministration of β-lactam and β-lactamase inhibitor (BLI) is one of the well-established therapeutic measures for bacterial infections caused by β-lactam-resistant Gram-negative bacteria, whereas we have only two options for orally active BLI, clavulanic acid and sulbactam. Furthermore, these BLIs are losing their clinical usefulness because of the spread of new β-lactamases, including extended-spectrum β-lactamases (ESBLs) belonging to class A β-lactamases, class C and D β-lactamases, and carbapenemases, which are hardly or not inhibited by these classical BLIs. From the viewpoints of medical cost and burden of healthcare personnel, oral therapy offers many advantages. In our search for novel diazabicyclooctane (DBO) BLIs possessing a thio-functional group at the C2 position, we discovered a 2-sulfinyl-DBO derivative (2), which restores the antibacterial activities of an orally available third-generation cephalosporin, ceftibuten (CTB), against various serine β-lactamase-producing strains including carbapenem-resistant Enterobacteriaceae (CRE). It can be orally absorbed via the ester prodrug modification and exhibits in vivo efficacy in a combination with CTB.
- Published
- 2021
28. Anti-PcrV titers in non-cystic fibrosis patients with Pseudomonas aeruginosa respiratory tract infection
- Author
-
Masaru Suzuki, Takafumi Hara, Tomoyuki Ohkawa, Hiroki Kimura, Mari Yoshida, Kentaro Nagaoka, Hideki Maki, Hirokazu Kimura, Yu Yamashita, Tatsuya Fukumoto, Kasumi Hayasaka, and Satoshi Konno
- Subjects
Colonization ,Male ,0301 basic medicine ,Microbiology (medical) ,medicine.medical_specialty ,Respiratory System ,030106 microbiology ,Enzyme-Linked Immunosorbent Assay ,medicine.disease_cause ,Gastroenterology ,Cystic fibrosis ,lcsh:Infectious and parasitic diseases ,Sputum culture ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Internal medicine ,medicine ,Humans ,Pseudomonas Infections ,lcsh:RC109-216 ,Prospective Studies ,030212 general & internal medicine ,Prospective cohort study ,Respiratory Tract Infections ,Aged ,Aged, 80 and over ,Antigens, Bacterial ,medicine.diagnostic_test ,Respiratory tract infections ,Pseudomonas aeruginosa ,business.industry ,Pneumonia ,General Medicine ,Middle Aged ,medicine.disease ,Antibodies, Bacterial ,Titer ,Infectious Diseases ,medicine.anatomical_structure ,Sputum ,Female ,medicine.symptom ,business ,Anti-PcrV antibody ,Respiratory tract - Abstract
Objective: The epidemiology and role of the anti-PcrV titer in non-cystic fibrosis patients with Pseudomonas aeruginosa airway tract infections is not fully understood. This study was performed to compare the anti-PcrV titers of patients with and without P. aeruginosa respiratory tract infections. Methods: This prospective cohort study was conducted at Hokkaido University Hospital in Japan. Participants had blood and sputum specimens collected on admission. They were divided into two groups based on their sputum culture results. Those with a P. aeruginosa infection were assigned to the P. aeruginosa (PA) group and those without a P. aeruginosa infection were assigned to the non-PA group. Serum anti-PcrV titers were measured using a validated ELISA. Results: Of the 44 participants, 15 were assigned to the PA group and 29 were assigned to the non-PA group. In the PA group, 10/15 participants (66.7%) had an anti-PcrV titer >1000 ng/ml compared to 3/29 participants (10.3%) in the non-PA group (p < 0.001). In the PA group, two of the five participants with an anti-PcrV titer
- Published
- 2019
29. Greenhouse environment modeling and simulation for microclimate control
- Author
-
Hideki Maki, Dongdong Ma, Jian Jin, Neal R. Carpenter, Tanzeel U. Rehman, and Mitchell R. Tuinstra
- Subjects
0106 biological sciences ,Plant growth ,Shuffling ,Simulation modeling ,Microclimate ,Greenhouse ,Forestry ,04 agricultural and veterinary sciences ,Agricultural engineering ,Horticulture ,01 natural sciences ,Computer Science Applications ,Modeling and simulation ,Noise ,Plant science ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
Greenhouse plant science assays have been impacted by microclimates which causes significant level of noise to plant growth measurement data. Researchers and scientist have been randomizing pots locations, which helps to re-distribute the noise, but does not remove the noise. The impacts from microclimates can be eliminated by shuffling plants, but there has been no study on the optimization of shuffling pattern, such as the frequency and moving distance for the pots. It is important to quantitatively study the microclimates in the greenhouse, so we can optimize the shuffling pattern accordingly. The aim of this study was to propose a computer modeling approach for simulating microclimate in the greenhouse, and then use the simulation result to optimize pot movement distance and frequency. A computational greenhouse model was developed using inputs from real design, materials and location of a Purdue Lily greenhouse in West Lafayette, Indiana. Microclimate variables, including ambient temperature and lighting radiation over 24 h and 7 days were predicted with the simulation model. Thermometers and lighting sensors were also distributed in the greenhouse for the ground-truth measurements over a seven-day period. Comparison of measured microclimate variables with predicted variables obtained from the computational model demonstrated that the simulation model could precisely predict temperatures and light radiation at any time, and at different positions in the greenhouse. Optimized pot movement frequency and distance were then determined with the simulation result. The new shuffling pattern can remove over 90% of the microclimate variance but could save more than 95% shuffling efforts compared with non-stop movement.
- Published
- 2019
30. Optimized angles of the swing hyperspectral imaging system for single corn plant
- Author
-
Liangju Wang, Tanzeel U. Rehman, Hideki Maki, Dongdong Ma, Michael V. Mickelbart, José A. Sánchez-Gallego, Libo Zhang, and Jian Jin
- Subjects
0106 biological sciences ,Ground truth ,Hyperspectral imaging ,Forestry ,04 agricultural and veterinary sciences ,Horticulture ,Swing ,Plant phenotyping ,01 natural sciences ,Normalized Difference Vegetation Index ,Computer Science Applications ,High nitrogen ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Agronomy and Crop Science ,Water content ,010606 plant biology & botany ,Mathematics ,Remote sensing - Abstract
During recent years, hyperspectral imaging systems have been widely applied in the greenhouses for plant phenotyping purposes. Current systems are typically designed as either top view or side view imaging mode. Top view is an ideal imaging angle for top leaves with flat leaf surfaces. However, most bottom leaves are either blocked or shaded. From side view, the entire plant structure is viewable. However, most leaf surfaces are not facing the camera, which impacts measurement quality. Besides, there could be advantages with certain tilted angle(s) between top view and side view. It’s interesting to explore the impact of different imaging angles to the phenotyping quality. For this purpose, a swing hyperspectral imaging system capable of capturing images at any angle from side view (0°) to top view (90°) by rotating the camera and the lighting source was designed. Corn plants were grown and allocated into 3 different treatments: high nitrogen (N) and well-watered (control), high N and drought-stressed, and low N and well-watered. Each plant was imaged at 7 different angles from 0° to 90° with an interval of 15°. The soil plant analysis development (SPAD) values and relative water content (RWC) ground truth measurements were used to establish treatment effects. The results showed that averaged plant-level Normalized Difference Vegetation Index (NDVI) values of plants in different treatments changed at different imaging angles. The results also indicated that for pixel-level NDVI distributions, the titled imaging angle of 75° was optimal to distinguish different water treatments, whereas, the tilted imaging angle of 15° was optimal to distinguish different N treatments. For pixel-level RWC distributions, the distribution difference between different water treatments was larger at higher imaging angles.
- Published
- 2019
31. In vivo monitoring of viable bacteria by SPECT using 99mTc-HYNIC(GH)2-UBI 29-41 and 99mTc-HYNIC(Tricine)2-UBI 29-41
- Author
-
Yasushi Arano, Tomoya Uehara, Kenichi Okazaki, Hideki Maki, Sotaro Momosaki, Kohji Abe, and Yuri Nishiyama
- Subjects
Tricine ,chemistry.chemical_compound ,Biochemistry ,biology ,Chemistry ,In vivo ,biology.organism_classification ,Bacteria - Abstract
Background: The number of bacterial infections that—for various reasons—are challenging to cure continues to increase. One such reason is persister cell infection. To investigate persister formation and persister infections, viable bacteria must be evaluated in the same animal over time. In this study, the feasibility of monitoring viable bacteria by SPECT using two labeled peptides was evaluated. Results: Two types of ubiquicidin (UBI) 29-41 labeled with technetium-99m, 99mTc-HYNIC(GH)2-UBI 29-41 and 99mTc-HYNIC(Tricine)2-UBI 29-41, were synthesized. The in vitro binding of these labeled peptides to Staphylococcus aureus was measured. For the in vivo study, each labeled peptide was injected into S. aureus infected mouse thigh after treatment with various doses of ciprofloxacin (CPFX). Two hours after injection, the accumulation of each labeled peptide at the infection site was assessed by SPECT, and then the number of viable bacteria was determined from the accumulation detected. The peptide labeling was successful, and the radiochemical purity was 91±9% (GH, n=8) and 100% (Tricine, n=8). The in vitro binding of the labeled peptides to S. aureus (5×108 cfu) without serum was 78.9% (GH) and 85.5% (Tricine) of the total 99mTc activity. With serum, the binding rate was 67.5% (GH) and 13.3% (Tricine). The accumulation of labeled peptide was calculated from the SPECT images, and that in the bacterial infection site (left thigh) was higher than that in the non-infection site (right thigh) for both peptides. Good correlation was found between the target-to-non-target (T/NT) ratios of each labeled peptide and the viable bacterial count at the infection site, and 99mTc-HYNIC(Tricine)2-UBI 29-41 had a wider range than 99mTc-HYNIC(GH)2-UBI 29-41.Conclusion: Using the SPECT/labeled peptide method, it was possible to monitor viable bacterial count in the range 103–108 cfu, which is appropriate for tracking viable bacterial counts in the same animal over time.
- Published
- 2021
32. A highly sensitive and specific method to evaluate viable fungal burden of Aspergillus fumigatus in mice by RT-qPCR for 18S ribosomal RNA
- Author
-
Kenichi Okazaki, Akira Naito, Yuuta Ukai, Hideki Maki, and Yuri Nishiyama
- Subjects
Microbiology (medical) ,Male ,Antifungal Agents ,Real-Time Polymerase Chain Reaction ,Microbiology ,Sensitivity and Specificity ,18S ribosomal RNA ,Aspergillus fumigatus ,03 medical and health sciences ,Galactomannan ,chemistry.chemical_compound ,Mice ,medicine ,RNA, Ribosomal, 18S ,Animals ,Humans ,skin and connective tissue diseases ,DNA, Fungal ,Molecular Biology ,Ribosomal DNA ,030304 developmental biology ,Voriconazole ,Invasive Pulmonary Aspergillosis ,0303 health sciences ,Aspergillus ,Microbial Viability ,biology ,030306 microbiology ,biology.organism_classification ,Reverse transcriptase ,Real-time polymerase chain reaction ,chemistry ,Mice, Inbred DBA ,medicine.drug - Abstract
Potent fungicidal activity is one of the key factors of antifungals to overcome invasive pulmonary aspergillosis (IPA). To date, quantification of Aspergillus DNA in the lungs and galactomannan (GM) in serum or bronchoalveolar lavage fluid have been developed as general methods for measuring fungal burden in IPA animal models. However, GM quantification is not supposed to be a suitable method for precise evaluation of the fungicidal effects of antifungals, because killed Aspergillus hyphae can release GM for a certain period until they are eliminated by the host. Therefore, in terms of detecting viable fungal burden of Aspergillus, quantification of Aspergillus DNA has been thought to be a suitable method. Here, to obtain a method with much higher sensitivity, we applied reverse transcription quantitative PCR (RT-qPCR) for A. fumigatus 18S ribosomal RNA to measure the viable fungal burden in murine IPA models. Prior to in vivo tests, we confirmed that the sensitivity of 18S rRNA was nearly 50-fold higher than that of 18S ribosomal DNA in vitro. This highly sensitive method made it possible to evaluate the fungicidal effects of antifungals in a low-inoculation murine IPA model. In this model, single administrations of higher doses of voriconazole and posaconazole, which have fungicidal activity, were able to display fungicidal effects with ≥1 log10 reductions by 18S rRNA quantification, whereas significant reductions in serum GM were not observed. These results suggest that 18S rRNA quantification is a powerful tool for screening novel antifungals with potent fungicidal activity only after a single administration.
- Published
- 2021
33. Correction: A zebrafish embryo screen utilizing gastrulation identifies the HTR2C inhibitor pizotifen as a suppressor of EMT-mediated metastasis
- Author
-
Joji Nakayama, Lora Tan, Yan Li, Boon Cher Goh, Shu Wang, Hideki Makinoshima, and Zhiyuan Gong
- Subjects
Medicine ,Science ,Biology (General) ,QH301-705.5 - Published
- 2024
- Full Text
- View/download PDF
34. Reduced susceptibility mechanism to cefiderocol, a siderophore cephalosporin, among clinical isolates from a global surveillance programme (SIDERO-WT-2014)
- Author
-
Hideki Maki, Takafumi Sato, Miho Kuroiwa, Naoki Kohira, Meredith Hackel, Daniel F. Sahm, Yoshino Ishioka, and Yoshinori Yamano
- Subjects
0301 basic medicine ,Microbiology (medical) ,Siderophore ,Surveillance study ,Gram-negative bacilli ,medicine.drug_class ,030106 microbiology ,Immunology ,Cephalosporin ,Siderophores ,Biology ,medicine.disease_cause ,Microbiology ,PER-type β-lactamase ,03 medical and health sciences ,Minimum inhibitory concentration ,0302 clinical medicine ,Cefiderocol non-susceptible ,Drug Resistance, Multiple, Bacterial ,medicine ,Immunology and Allergy ,Cefiderocol ,030212 general & internal medicine ,Escherichia coli ,Gram negative bacilli ,Siderophore cephalosporin ,QR1-502 ,Anti-Bacterial Agents ,Cephalosporins ,Multiple factors ,Reduced susceptibility - Abstract
Objective To investigate possible mechanistic factors to explain cefiderocol (CFDC) non-susceptibility, we characterized 38 clinical isolates with a CFDC minimum inhibitory concentration (MIC) of >4 μg/mL from a multi-national surveillance study. Methods The MIC measurement in the presence of β-lactamase inhibitors and whole genome sequencing were performed. Results The MIC decrease of CFDC by β-lactamase inhibitors was observed against all of the test isolates. Among the 38 isolates, NDM and PER genes were observed in 5 and 25 isolates, respectively. No other β-lactamases responsible for high MIC were identified in the other eight isolates. The MIC of CDFC against Escherichia coli isogenic strains introduced with NDM and PER β-lactamase increased by ≥16-fold, suggesting the contribution of NDM and PER to the non-susceptibility to CFDC. Against NDM producers, a ≥8-fold MIC increase was observed only when both serine- and metallo-type β-lactamase inhibitors were added. In addition, many of the PER or NDM producers remained susceptible to CFDC. These results suggested that the presence of only NDM or PER would not lead to non-susceptibility to CFDC and that multiple factors would be related to CFDC resistance. Conclusion Multiple factors including NDM and PER could be related to reduced susceptibility to CFDC.
- Published
- 2020
35. Rare FGFR fusion genes in cervical cancer and transcriptome‐based subgrouping of patients with a poor prognosis
- Author
-
Kengo Hiranuma, Yuka Asami, Mayumi Kobayashi Kato, Naoya Murakami, Yoko Shimada, Maiko Matsuda, Shu Yazaki, Erisa Fujii, Kazuki Sudo, Ikumi Kuno, Masaaki Komatsu, Ryuji Hamamoto, Hideki Makinoshima, Koji Matsumoto, Mitsuya Ishikawa, Takashi Kohno, Yasuhisa Terao, Atsuo Itakura, Hiroshi Yoshida, Kouya Shiraishi, and Tomoyasu Kato
- Subjects
cervical cancer ,fibroblast growth factor receptor 3 ,gene fusion ,human papillomavirus ,macrophage ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Although cervical cancer is often characterized as preventable, its incidence continues to increase in low‐ and middle‐income countries, underscoring the need to develop novel therapeutics for this disease.This study assessed the distribution of fusion genes across cancer types and used an RNA‐based classification to divide cervical cancer patients with a poor prognosis into subgroups. Material and Methods RNA sequencing of 116 patients with cervical cancer was conducted. Fusion genes were extracted using StarFusion program. To identify a high‐risk group for recurrence, 65 patients who received postoperative adjuvant therapy were subjected to non‐negative matrix factorization to identify differentially expressed genes between recurrent and nonrecurrent groups. Results We identified three cases with FGFR3‐TACC3 and one with GOPC‐ROS1 fusion genes as potential targets. A search of publicly available data from cBioPortal (21,789 cases) and the Center for Cancer Genomics and Advanced Therapeutics (32,608 cases) showed that the FGFR3 fusion is present in 1.5% and 0.6% of patients with cervical cancer, respectively. The frequency of the FGFR3 fusion gene was higher in cervical cancer than in other cancers, regardless of ethnicity. Non‐negative matrix factorization identified that the patients were classified into four Basis groups. Pathway enrichment analysis identified more extracellular matrix kinetics dysregulation in Basis 3 and more immune system dysregulation in Basis 4 than in the good prognosis group. CIBERSORT analysis showed that the fraction of M1 macrophages was lower in the poor prognosis group than in the good prognosis group. Conclusions The distribution of FGFR fusion genes in patients with cervical cancer was determined by RNA‐based analysis and used to classify patients into clinically relevant subgroups.
- Published
- 2023
- Full Text
- View/download PDF
36. Modeling of Environmental Impacts on Aerial Hyperspectral Images for Corn Plant Phenotyping
- Author
-
Hideki Maki, Tanzeel U. Rehman, Libo Zhang, Dongdong Ma, Mitchell R. Tuinstra, and Jian Jin
- Subjects
010504 meteorology & atmospheric sciences ,Remote sensing application ,Science ,Continuous monitoring ,Solar zenith angle ,environment variation ,Hyperspectral imaging ,04 agricultural and veterinary sciences ,01 natural sciences ,Normalized Difference Vegetation Index ,aerial hyperspectral images ,plant phenotyping features ,time series decomposition ,artificial neural networks ,Feature (computer vision) ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,General Earth and Planetary Sciences ,Environmental science ,Image sensor ,Decomposition of time series ,0105 earth and related environmental sciences ,Remote sensing - Abstract
Aerial imaging technologies have been widely applied in agricultural plant remote sensing. However, an as yet unexplored challenge with field imaging is that the environmental conditions, such as sun angle, cloud coverage, temperature, and so on, can significantly alter plant appearance and thus affect the imaging sensor’s accuracy toward extracting plant feature measurements. These image alterations result from the complicated interaction between the real-time environments and plants. Analysis of these impacts requires continuous monitoring of the changes through various environmental conditions, which has been difficult with current aerial remote sensing systems. This paper aimed to propose a modeling method to comprehensively understand and model the environmental influences on hyperspectral imaging data. In 2019, a fixed hyperspectral imaging gantry was constructed in Purdue University’s research farm, and over 8000 repetitive images of the same corn field were taken with a 2.5 min interval for 31 days. Time-tagged local environment data, including solar zenith angle, solar irradiation, temperature, wind speed, and so on, were also recorded during the imaging time. The images were processed for phenotyping data, and the time series decomposition method was applied to extract the phenotyping data variation caused by the changing environments. An artificial neural network (ANN) was then built to model the relationship between the phenotyping data variation and environmental changes. The ANN model was able to accurately predict the environmental effects in remote sensing results, and thus could be used to effectively eliminate the environment-induced variation in the phenotyping features. The test of the normalized difference vegetation index (NDVI) calculated from the hyperspectral images showed that variance in NDVI was reduced by 79%. A similar performance was confirmed with the relative water content (RWC) predictions. Therefore, this modeling method shows great potential for application in aerial remote sensing applications in agriculture, to significantly improve the imaging quality by effectively eliminating the effects from the changing environmental conditions.
- Published
- 2021
37. Three Cases of Tiny Intracranial Aneurysm Identified to be Ruptured by Site of Remaining Clot in Follow-up Computed Tomography and Subsequent Angiogram
- Author
-
Hideki Maki, Takashi Yamanouchi, Takashi Izumi, Akira Kito, Tomoyuki Noda, and Noriaki Matsubara
- Subjects
medicine.medical_specialty ,Subarachnoid hemorrhage ,medicine.diagnostic_test ,business.industry ,Computed tomography ,medicine.disease ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Aneurysm ,medicine ,Neurology (clinical) ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,030217 neurology & neurosurgery - Published
- 2017
38. ON THE SCOPE OF NAZE ‘WHY’ IN JAPANESE
- Author
-
Fumikazu Niinuma, Hideki Maki, and Megumi Hasebe
- Subjects
Linguistics and Language ,Scope (project management) ,Political science ,Engineering ethics ,Language and Linguistics - Published
- 2017
39. Antisense peptide nucleic acid–peptide conjugates for functional analyses of genes in Pseudomonas aeruginosa
- Author
-
Kenzo Nishiguchi, Motoki Azuma, Tasuku Tsukamoto, Ken-ichi Setsukinai, Yoshito Numata, Yousuke Okuno, Masatomo Rokushima, Hiroshi Takemoto, Hideki Maki, and Kazuhiko Maekawa
- Subjects
Peptide Nucleic Acids ,Clinical Biochemistry ,Pharmaceutical Science ,Peptide ,Microbial Sensitivity Tests ,medicine.disease_cause ,Biochemistry ,chemistry.chemical_compound ,Bacterial Proteins ,Drug Discovery ,Gene expression ,medicine ,FtsZ ,Molecular Biology ,Gene ,chemistry.chemical_classification ,Gene knockdown ,biology ,Peptide nucleic acid ,Pseudomonas aeruginosa ,Organic Chemistry ,Oligonucleotides, Antisense ,Molecular biology ,Anti-Bacterial Agents ,Cytoskeletal Proteins ,chemistry ,biology.protein ,Nucleic acid ,Molecular Medicine ,Peptides - Abstract
Pseudomonas aeruginosa is one of the most common and clinically important pathogens because of its resistance to a wide variety of antibiotics. A number of treatments of P. aeruginosa have been developed, but there is still no definitive one. Antisense drugs have a great potential to treat multidrug-resistant P. aeruginosa because this technology, in principle, can inhibit the expression of any essential genes. Nucleic Acid Ther.2012, 22, 323 reported that peptide nucleic acid (PNA) antisenses conjugated to the carrier peptide (RXR)4 and targeted to ftsZ and acpP (essential genes) had antibacterial activity in P. aeruginosa. However, growth inhibition was also found with peptide-PNA antisense conjugates of mismatched sequences (negative controls), and hence there remains a possibility for considerable enhancement of basal level activity due to the general toxicity. To assess the true potential of peptide-PNA conjugates, we measured sequence-dependent knockdown of the (RXR)4-PNA conjugates by using a scrambled sequence as a negative control. In addition, we evaluated (RXR)4-PNA antisenses against three other essential genes (lepB, lptD and mraY) and a non-essential gene (PA1303), and confirmed that multiple sequences targeting only the essential genes showed antimicrobial activity in P. aeruginosa PAO1 cells. We also conducted a rescue experiment and confirmed that the antimicrobial activity of anti-mraY antisenses was an on-target effect, not due to general toxicity. These findings indicate that the (RXR)4–PNA antisense should be a useful tool for target validation of a specific gene and could be a therapeutic platform capable of targeting a variety of genes in P. aeruginosa.
- Published
- 2015
40. Automated leaf movement tracking in time-lapse imaging for plant phenotyping
- Author
-
Dongdong Ma, Tanzeel U. Rehman, Hideki Maki, Liangju Wang, Libo Zhang, Jian Jin, José A. Sánchez-Gallego, and Michael V. Mickelbart
- Subjects
0106 biological sciences ,Movement tracking ,food.ingredient ,Abiotic stress ,fungi ,Optical flow ,food and beverages ,Forestry ,04 agricultural and veterinary sciences ,Horticulture ,Biology ,Gene mutation ,biology.organism_classification ,01 natural sciences ,Computer Science Applications ,food ,Arabidopsis ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Arabidopsis thaliana ,Time-Lapse Imaging ,Biological system ,Agronomy and Crop Science ,Cotyledon ,010606 plant biology & botany - Abstract
The analysis of the rhythm of leaf movement is a simple yet effective method to quantify the impacts of external (e.g. abiotic stress) and/or internal (e.g. gene mutations) perturbations on plant growth. We developed an automated monitoring system to quantify leaf movement using time-lapse imaging and a subsequent leaf-tracking algorithm. The leaf-tracking algorithm was based on dense optical flow algorithm to directly record temporal motion events. The algorithm measures motion directly, rather than detecting leaf or cotyledon tip in every image, so multiple leaves, including occluded leaves, can be measured simultaneously. To test the monitoring system, wild-type and drought-tolerant mutant genotypes of Arabidopsis (Arabidopsis thaliana) were subjected to a combinatorial two water and two nitrogen levels. High-frequency time-lapse images were acquired from top view for little over 6 consecutive days at a frequency of 4 min. Results showed that nitrogen and water treatments elicited differences in mean plant displacement in both genotypes. It also showed significant differences among the two different genotypes in the mean displacement when plants were under water or nitrogen stress. These results confirmed the new monitoring system’s ability to discern environmental and genotypic differences in plant response.
- Published
- 2020
41. Contributions of yap1 Mutation and Subsequent atrF Upregulation to Voriconazole Resistance in Aspergillus flavus
- Author
-
Miho Kuroiwa, Hiroki Naruse, Tomoyuki Homma, Hideki Maki, Naoko Kurihara, Akira Naito, and Yuuta Ukai
- Subjects
0301 basic medicine ,Antifungal Agents ,030106 microbiology ,Mutant ,Aspergillus flavus ,Gene mutation ,Biology ,medicine.disease_cause ,Fungal Proteins ,03 medical and health sciences ,Mechanisms of Resistance ,Drug Resistance, Fungal ,medicine ,Point Mutation ,Pharmacology (medical) ,Gene ,Transcription factor ,Pharmacology ,YAP1 ,Mutation ,Point mutation ,biology.organism_classification ,Molecular biology ,Up-Regulation ,Oxidative Stress ,Infectious Diseases ,ATP-Binding Cassette Transporters ,Voriconazole - Abstract
Aspergillus flavus is the second most significant pathogenic cause of invasive aspergillosis; however, its emergence risks and mechanisms of voriconazole (VRC) resistance have not yet been elucidated in detail. Here, we demonstrate that repeated exposure of A. flavus to subinhibitory concentrations of VRC in vitro causes the emergence of a VRC-resistant mutant with a novel resistance mechanism. The VRC-resistant mutant shows a MIC of 16 μg/ml for VRC and of 0.5 μg/ml for itraconazole (ITC). Whole-genome sequencing analysis showed that the mutant possesses a point mutation in yap1, which encodes a bZIP transcription factor working as the master regulator of the oxidative stress response, but no mutations in the cyp51 genes. This point mutation in yap1 caused alteration of Leu558 to Trp (Yap1(Leu558Trp)) in the putative nuclear export sequence in the carboxy-terminal cysteine-rich domain of Yap1. This Yap1(Leu558Trp) substitution was confirmed as being responsible for the VRC-resistant phenotype, but not for that of ITC, by the revertant to Yap1(wild type) with homologous gene replacement. Furthermore, Yap1(Leu558Trp) caused marked upregulation of the atrF ATP-binding cassette transporter, and the deletion of atrF restored susceptibility to VRC in A. flavus. These findings provide new insights into VRC resistance mechanisms via a transcriptional factor mutation that is independent of the cyp51 gene mutation in A. flavus.
- Published
- 2018
42. Comparison of the risk of acquiring in vitro resistance to doripenem and tazobactam/piperacillin by CTX-M-15-producing Escherichia coli
- Author
-
Sachi Kanazawa, Masaaki Izawa, Takahiro Yamaguchi, Takafumi Hara, Tsukasa Horiyama, Masakatsu Tsuji, Takafumi Sato, and Hideki Maki
- Subjects
Microbiology (medical) ,Colony Count, Microbial ,Penicillanic Acid ,Ceftazidime ,Microbial Sensitivity Tests ,Biology ,medicine.disease_cause ,Tazobactam ,beta-Lactamases ,Microbiology ,Agar plate ,Mutation Rate ,Risk Factors ,Drug Resistance, Multiple, Bacterial ,Escherichia coli ,polycyclic compounds ,medicine ,Pharmacology (medical) ,RNA, Messenger ,Piperacillin ,Strain (chemistry) ,Escherichia coli Proteins ,Hydrolysis ,Doripenem ,In vitro ,Anti-Bacterial Agents ,Piperacillin, Tazobactam Drug Combination ,Infectious Diseases ,Carbapenems ,medicine.drug - Abstract
To compare the risk of acquiring in vitro resistance between doripenem and tazobactam/piperacillin by CTX-M-15-producing Escherichia coli, the in vitro frequency of resistance was determined. Four strains carrying multiple β-lactamases such as blaOXA-1 or blaCTX-M-27 as well as blaCTX-M-15 and blaTEM-1 were used. No resistant colonies appeared on doripenem-containing plates, whereas resistant colonies were obtained from three of four test strains against tazobactam/piperacillin using agar plate containing 8- to 16-fold MIC of each drug. These three acquired tazobactam/piperacillin-resistant strains were not cross-resistant to doripenem, and they showed 1.9- to 3.1-fold higher piperacillin-hydrolysis activity compared to those of each parent strain. The change of each β-lactamase mRNA expression measured by real-time PCR varied among three resistant strains. One of three tazobactam/piperacillin-resistant strains with less susceptibility to ceftazidime overexpressed both blaCTX-M-15 and blaTEM-1, and the other two strains showed higher mRNA expression of either blaTEM-1 or blaOXA-1. These results demonstrate that multiple β-lactamases carried by CTX-M-15-producing E. coli contributed to the resistance to tazobactam/piperacillin. On the other hand, these resistant strains maintained susceptibility to doripenem. The risk of acquiring in vitro resistance to doripenem by CTX-M-15-producing E. coli seems to be lower than that to tazobactam/piperacillin.
- Published
- 2015
43. DOES MODERN CHINESE ALLOW GENITIVE SUBJECTS?
- Author
-
Hideki Maki, Can Wang, and Ling-Yun Fan
- Subjects
Linguistics and Language ,Genitive case ,History ,Subject (grammar) ,Language and Linguistics ,Linguistics - Published
- 2015
44. THE ABSOLUTIVE/GENITIVE ALTERNATION IN SELAYARESE
- Author
-
Hideki Maki and Hasan Basri
- Subjects
Linguistics and Language ,Genitive case ,Computer science ,Clitic ,Ergative case ,Alternation (formal language theory) ,Absolutive case ,Language and Linguistics ,Linguistics - Published
- 2015
45. PUZZLES WITH THE SUBJECT POSITION IN IRISH
- Author
-
Hideki Maki and Dónall P. Ó Baoill
- Subjects
Linguistics and Language ,Position (obstetrics) ,History ,Irish ,Subject (philosophy) ,language ,Language and Linguistics ,Linguistics ,language.human_language - Published
- 2015
46. P1342: THE IMPACT OF CLONAL HEMATOPOIESIS ON THE RISK OF SEVERE COVID-19 INFECTION
- Author
-
Ryunosuke Saiki, Ho Namkoong, Qingbo Wang, Ryuya Edahiro, Kyuto Sonehara, Takanori Hasegawa, Hideki Makishima, Yasuhito Nannya, Nobuyuki Kakiuchi, Yuichi Shiraishi, Kenichi Chiba, Hiroko Tanaka, Akinori Kimura, Seiya Imoto, Satoru Miyano, Takanori Kanai, Koichi Fukunaga, Yukinori Okada, and Seishi Ogawa
- Subjects
Diseases of the blood and blood-forming organs ,RC633-647.5 - Published
- 2023
- Full Text
- View/download PDF
47. [A Case of Dural Arteriovenous Fistula that Developed 21 Months after Cerebral Venous Sinus Thrombosis]
- Author
-
Motonori, Ishii, Takashi, Yamanouchi, Ryosuke, Oshima, Masaki, Sato, Tomoyuki, Noda, Hideki, Maki, and Akira, Kito
- Subjects
Central Nervous System Vascular Malformations ,Male ,Sinus Thrombosis, Intracranial ,Time Factors ,Angiography ,Humans ,Middle Aged ,Tomography, X-Ray Computed ,Embolization, Therapeutic - Abstract
A 56-year-old man experienced a sudden onset of left hemiparesis. The computed tomography(CT)scan revealed a lobar hemorrhage in the right fronto-parietal lobe. After his admission, deep vein thrombosis was detected in his left lower limb, and angiograms taken on the 36th day of hospitalization revealed cerebral venous sinus thrombosis. Anticoagulant treatment was induced. After 21 months, he experienced a sudden onset of left hemiparesis again. The CT scan revealed a new lobar hemorrhage in the right frontal lobe, and angiograms revealed that two dural arteriovenous fistulas(dAVF)developed in the superior sagittal sinus(SSS)and the left transverse-sigmoid sinus. The one in the SSS had retrograde drainage from the bilateral middle meningeal artery, and we performed transarterial embolization with 50% n-butyl-cyanoacrylate. Postoperative course was uneventful and no further stroke occurred. Intracranial dAVF is known to be an acquired disease caused by venous hypertension, but we rarely find new development of dAVFs after venous diseases. This patient's case will help to elucidate the pathophysiology of dAVF.
- Published
- 2017
48. Binding properties of antimicrobial agents to dipeptide terminal of lipid II using surface plasmon resonance
- Author
-
Hiroshi Kamimori, Kenzo Nishiguchi, Masako Oka, Hideki Maki, Hiroki Kinouchi, Hirokazu Arimoto, and Hiroshi Kitagawa
- Subjects
Alanine ,Dipeptide ,Bacteria ,Lipid II ,Chemistry ,Ligand ,Stereochemistry ,Ligand binding assay ,education ,Biophysics ,Dipeptides ,Microbial Sensitivity Tests ,Cell Biology ,Surface Plasmon Resonance ,Antimicrobial ,Biochemistry ,Uridine Diphosphate N-Acetylmuramic Acid ,Receptor–ligand kinetics ,Anti-Bacterial Agents ,Kinetics ,chemistry.chemical_compound ,Surface plasmon resonance ,Molecular Biology - Abstract
We developed a surface plasmon resonance (SPR) assay to estimate the interactions of antimicrobial agents with the dipeptide terminal of lipid II ( d -alanyl- d -alanine) and its analogous dipeptides ( l -alanyl- l -alanine and d -alanyl- d -lactate) as ligands. The established SPR method showed the reproducible immobilization of ligands on sensor chip and analysis of binding kinetics of antimicrobial agents to ligands. The ligand-immobilized chip could be used repeatedly for at least 200 times for the binding assay of antimicrobial agents, indicating that the ligand-immobilized chip is sufficiently robust for the analysis of binding kinetics. In this SPR system, the selective and specific binding characteristics of vancomycin and its analogs to the ligands were estimated and the kinetic parameters were calculated. The kinetic parameters revealed that one of the remarkable binding characteristics was the specific interaction of vancomycin to only the d -alanyl- d -alanine ligand. In addition, the kinetic binding data of SPR showed close correlation with the antimicrobial activity. The SPR data of other antimicrobial agents (e.g., teicoplanin) to the ligands showed correlation with the antimicrobial activity on the basis of the therapeutic mechanism. Our SPR method could be a valuable tool for predicting the binding characteristics of antimicrobial agents to the dipeptide terminal of lipid II.
- Published
- 2014
49. CLAUSAL ARGUMENTS IN IRISH
- Author
-
Dónall P. Ó Baoill and Hideki Maki
- Subjects
Linguistics and Language ,History ,Irish ,language ,Language and Linguistics ,language.human_language ,Linguistics - Published
- 2014
50. WHERE THE NOMINATIVE/GENITIVE ALTERNATION GENUINELY TAKES PLACE IN MODERN JAPANESE
- Author
-
Megumi Hasebe, Hideki Maki, and Toshiro Umezawa
- Subjects
Linguistics and Language ,Genitive case ,History ,Case alternation ,Alternation (formal language theory) ,Nominative case ,Language and Linguistics ,Linguistics - Published
- 2014
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.