10 results on '"Nagata J"'
Search Results
2. The factors associated with retinal pigment epithelium tear development in the early phase after treatment initiation for age-related macular degeneration.
- Author
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Shiose S, Notomi S, Hashimoto S, Nagata J, Fukuda Y, Kano K, Ishikawa K, and Sonoda KH
- Subjects
- Humans, Male, Female, Retrospective Studies, Aged, Follow-Up Studies, Ranibizumab administration & dosage, Risk Factors, Time Factors, Aged, 80 and over, Tomography, Optical Coherence methods, Fluorescein Angiography methods, Retinal Perforations diagnosis, Retinal Perforations etiology, Retinal Pigment Epithelium pathology, Angiogenesis Inhibitors administration & dosage, Vascular Endothelial Growth Factor A antagonists & inhibitors, Wet Macular Degeneration drug therapy, Wet Macular Degeneration diagnosis, Intravitreal Injections, Fundus Oculi, Visual Acuity
- Abstract
Purpose: This study aimed to evaluate the factors associated with retinal pigment epithelium (RPE) tear development in the early phase after anti-vascular endothelial growth factor (VEGF) drug initiation in eyes with neovascular age-related macular degeneration (nAMD) and retinal pigment epithelial detachment (PED)., Methods: Treatment-naive eyes with nAMD and PED for which anti-VEGF drug injections had been initiated and followed up for at least 3 months after the 1st anti-VEGF drug injection, were retrospectively investigated. Baseline characteristics of the PEDs, including type, height, and area, were evaluated using fundus photographs, fluorescein angiography, and optical coherence tomography images. The association between patient age, sex, medical history, PED characteristics, and the development of RPE tears within 3 months of starting anti-VEGF therapy was examined., Results: This study included 244 eyes (230 patients; mean age 75.0 years, 159 males and 71 females). RPE tears occurred in 13 eyes (5.3%) within 3 months of the start of anti-VEGF therapy. Multivariate analysis showed an association of the development of RPE tears with PED height (every 100 µm, odds ratio [OR]: 1.50, 95% confidence interval [CI]: 1.07-2.12, p = 0.019), PED area (every 10 mm
2 , OR: 3.02, CI: 1.22-7.46, p = 0.016), and the presence of fibrovascular PED (OR: 59.22, CI: 4.12-850.59, p = 0.002). Eyes with cleft (the hypo-reflective space beneath the fibrovascular PED) were more likely to develop an RPE tear (p = 0.01, χ-square test)., Conclusions: Fibrovascular PED, large PED area, high PED height, and the cleft finding are independent risk factors for the development of RPE tears early after the administration of anti-VEGF drugs., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)- Published
- 2024
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3. Longitudinal and Geographic Trends in Perceived Racial Discrimination Among Adolescents in the U.S.: The Adolescent Brain Cognitive Development (ABCD) Study.
- Author
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Fields CT, Black C, Calhoun AJ, Assari S, Zhou X, Nagata J, and Gee DG
- Abstract
This study examines longitudinal and geographic trends in perceived racial discrimination among U.S. adolescents using data from the Adolescent Brain Cognitive Development (ABCD) Study. A diverse sample of 11,868 children aged 9-10 at baseline from 22 sites across the U.S. was analyzed, assessing perceived discrimination at ages 10-11, 11-12, and 13-14 using items adapted from the Perceived Discrimination Scale. Binomial logistic regression models were used to evaluate longitudinal trends and geographic variation, adjusting for demographic factors such as race/ethnicity, parental education, and income. Results show that perceived racial discrimination increased significantly from ages 10-11 to 13-14, particularly among Black and Asian adolescents. By age 13-14, nearly half of Black adolescents and over a quarter of Asian adolescents reported discrimination. Geographic analysis revealed that Black adolescents in the Western U.S. and predominantly White affluent neighborhoods had the highest odds of perceived discrimination. Higher state-level anti-Black bias was associated with lower discrimination rates among Black adolescents but higher rates for Asian adolescents. These findings highlight the evolving nature of racial discrimination during adolescence and underscore the need for targeted interventions that address racism's mental health impacts on adolescents, particularly in high-risk geographic and socio-economic contexts.
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- 2024
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4. Correlation during the extent of surgical resection, oral function and quality of life after tongue cancer surgery: Single-institution study.
- Author
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Shirakawa J, Kaneuji T, Matsuno D, Nagata J, Hirayama B, Tanaka F, Nakamura Y, and Yamashita Y
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- Humans, Male, Female, Middle Aged, Aged, Postoperative Complications epidemiology, Postoperative Complications diagnosis, Postoperative Complications psychology, Postoperative Complications etiology, Deglutition physiology, Adult, Tongue surgery, Tongue physiopathology, Aged, 80 and over, Mastication physiology, Quality of Life, Tongue Neoplasms surgery, Tongue Neoplasms pathology, Glossectomy
- Abstract
Introduction: The extent of surgical resection for tongue tumors is determined by tumor size, potentially affecting oral function and quality of life (QoL). However, the relationship between oral dysfunction and QoL decline due to glossectomy extent remains unexplored. Therefore, these correlations and their predictive value for postoperative QoL decline were elucidated., Methods: Patients treated for tongue cancer at our hospital between 2018 and 2022 were categorized by partial, hemi, or subtotal/total glossectomy. Assessments included swallowing function (RSST), articulation (Oral Diadochokinesis (ODK)), mastication, tongue pressure, and oral moisture. QoL was measured using the Oral Health Impact Profile-14 (OHIP-14). Differences within parameters were assessed using Kruskal-Wallis tests, and between-group comparisons via Mann-Whitney U tests. Spearman's correlation analysis examined parameter relationship., Results: 35 patients were evaluated. Significant differences were found in ODK [ta] (p = 0.015), [ka] (p = 0.0006), tongue pressure (p = 0.0001), moisture levels (p = 0.031), OHIP-14 domains: physical disability (p = 0.014) and social disability (p = 0.046). ODK [ta] (PG: 5.95, HG: 5.38, TG: 4.03 times), [ka] (PG: 5.56, HG: 4.78, TG: 3.23 times), and tongue pressure (PG: 32.9, HG: 21.2, TG: 10.3 mmHg) decreased with glossectomy extent, while physical (PG: 0.27, HG: 2.38, TG: 2.00) and social disability (PG: 0.18, HG: 0.94, TG: 1.43) worsened. A significant negative correlation was observed between tongue pressure and social disability (p = 0.013, r = -0.36)., Conclusion: Expanding resection significantly impacted postoperative oral function and QoL. Tongue pressure assessment may predict long-term social disability in patient QoL., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Masson SAS. All rights reserved.)
- Published
- 2024
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5. Usefulness of a long hood for the detection of bleeding sites in colonic diverticular hemorrhage: A randomized controlled trial.
- Author
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Shiomi R, Nagata J, Tsuzuki Y, Yokota M, Matsumoto H, Miyaguchi K, Ohgo H, Tsuda S, Ito H, Kojima S, Hirooka N, Nakamoto H, Suzuki T, and Imaeda H
- Abstract
Background and Aim: The use of a hood at the tip of a colonoscope enables aspiration, inversion of the diverticulum, and observation of the inside of the diverticulum. In most previous studies, a short hood was used; however, observation of the diverticulum is often inadequate. Long food is promising by previous research, but it was a retrospective study using propensity matching and has some limitations. We compared the identification rate of stigmata of recent hemorrhage (SRH) between the long and standard hoods in cases of suspected colonic diverticular hemorrhage (CDH) to confirm the usefulness of long hood by prospective randomized controlled trial., Methods: Eighty patients (42 in the long hood group [L group] and 38 in the short hood group [S group]) who visited the Saitama Medical University Hospital and Tokai University Hachioji Hospital between December 2018 and July 2021 with a chief complaint of bloody stool and suspected CDH, based on the clinical course and imaging studies, were included. Patients were randomly assigned to the L or S group., Results: Regarding patient background, age was significantly higher in the L group; however, no significant differences were found in medical history or history of antithrombotic medication or nonsteroidal anti-inflammatory drug use. Identification rate of SRH was significantly higher in the L group (58.5%, 24/42 patients) than in the S group (26.3%, 10/38 patients) ( P < 0.05). All patients were treated using the clip method, and the rate of rebleeding within 1 month was not significantly different between the two groups., Conclusion: A long hood was more useful compared with a short hood in identifying SRH of CDH (UMIN000034603)., (© 2024 The Author(s). JGH Open published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.)
- Published
- 2024
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6. Evaluation of robustness of optimization methods in breast intensity-modulated radiation therapy using TomoTherapy.
- Author
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Oki Y, Akasaka H, Uehara K, Mizonobe K, Sawada M, Nagata J, Harada A, and Mayahara H
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- Humans, Female, Radiotherapy Dosage, Middle Aged, Dose-Response Relationship, Radiation, Retrospective Studies, Breast diagnostic imaging, Radiotherapy, Intensity-Modulated, Radiotherapy Planning, Computer-Assisted, Breast Neoplasms radiotherapy, Breast Neoplasms diagnostic imaging
- Abstract
Intensity-modulated radiation therapy (IMRT) has become a popular choice for breast cancer treatment. We aimed to evaluate and compare the robustness of each optimization method used for breast IMRT using TomoTherapy. A retrospective analysis was performed on 10 patients with left breast cancer. For each optimization method (clipping, virtual bolus, and skin flash), a corresponding 50 Gy/25 fr plan was created in the helical and direct TomoTherapy modes. The dose-volume histogram parameters were compared after shifting the patients anteriorly and posteriorly. In the helical mode, when the patient was not shifted, the median D1cc (minimum dose delivered to 1 cc of the organ volume) of the breast skin for the clipping and virtual bolus plans was 52.2 (interquartile range: 51.9-52.6) and 50.4 (50.1-50.8) Gy, respectively. After an anterior shift, D1cc of the breast skin for the clipping and virtual bolus plans was 56.0 (55.6-56.8) and 50.9 (50.5-51.3) Gy, respectively. When the direct mode was used without shifting the patient, D1cc of the breast skin for the clipping, virtual bolus, and skin flash plans was 52.6 (51.9-53.1), 53.4 (52.6-53.9), and 52.3 (51.7-53.0) Gy, respectively. After shifting anteriorly, D1cc of the breast skin for the clipping, virtual bolus, and skin flash plans was 55.6 (54.1-56.4), 52.4 (52.0-53.0), and 53.6 (52.6-54.6) Gy, respectively. The clipping method is not sufficient for breast IMRT. The virtual bolus and skin flash methods were more robust optimization methods according to our analyses., (© 2024. Australasian College of Physical Scientists and Engineers in Medicine.)
- Published
- 2024
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- View/download PDF
7. Mechanism of muscle atrophy in a normal-weight rat model of type 2 diabetes established by using a soft-pellet diet.
- Author
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Akieda-Asai S, Ma H, Han W, Nagata J, Yamaguchi F, and Date Y
- Subjects
- Rats, Animals, Insulin metabolism, Muscular Atrophy etiology, Muscular Atrophy metabolism, Muscle, Skeletal metabolism, Diet, Diet, High-Fat, Insulin Resistance physiology, Glucose Intolerance metabolism, Diabetes Mellitus, Type 2 metabolism
- Abstract
Dietary factors such as food texture affect feeding behavior and energy metabolism, potentially causing obesity and type 2 diabetes. We previously found that rats fed soft pellets (SPs) were neither hyperphagic nor overweight but demonstrated glucose intolerance, insulin resistance, and hyperplasia of pancreatic β-cells. In the present study, we investigated the mechanism of muscle atrophy in rats that had been fed SPs on a 3-h time-restricted feeding schedule for 24 weeks. As expected, the SP rats were normal weight; however, they developed insulin resistance, glucose intolerance, and fat accumulation. In addition, skeletal muscles of SP rats were histologically atrophic and demonstrated disrupted insulin signaling. Furthermore, we learned that the muscle atrophy of the SP rats developed via the IL-6-STAT3-SOCS3 and ubiquitin-proteasome pathways. Our data show that the dietary habit of consuming soft foods can lead to not only glucose intolerance or insulin resistance but also muscle atrophy., (© 2024. The Author(s).)
- Published
- 2024
- Full Text
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8. Artificial intelligence-based model for predicting pulmonary arterial hypertension on chest x-ray images.
- Author
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Imai S, Sakao S, Nagata J, Naito A, Sekine A, Sugiura T, Shigeta A, Nishiyama A, Yokota H, Shimizu N, Sugawara T, Nomi T, Honda S, Ogaki K, Tanabe N, Baba T, and Suzuki T
- Subjects
- Humans, Artificial Intelligence, X-Rays, Thorax, Pulmonary Arterial Hypertension diagnostic imaging, Deep Learning
- Abstract
Background: Pulmonary arterial hypertension is a serious medical condition. However, the condition is often misdiagnosed or a rather long delay occurs from symptom onset to diagnosis, associated with decreased 5-year survival. In this study, we developed and tested a deep-learning algorithm to detect pulmonary arterial hypertension using chest X-ray (CXR) images., Methods: From the image archive of Chiba University Hospital, 259 CXR images from 145 patients with pulmonary arterial hypertension and 260 CXR images from 260 control patients were identified; of which 418 were used for training and 101 were used for testing. Using the testing dataset for each image, the algorithm outputted a numerical value from 0 to 1 (the probability of the pulmonary arterial hypertension score). The training process employed a binary cross-entropy loss function with stochastic gradient descent optimization (learning rate parameter, α = 0.01). In addition, using the same testing dataset, the algorithm's ability to identify pulmonary arterial hypertension was compared with that of experienced doctors., Results: The area under the curve (AUC) of the receiver operating characteristic curve for the detection ability of the algorithm was 0.988. Using an AUC threshold of 0.69, the sensitivity and specificity of the algorithm were 0.933 and 0.982, respectively. The AUC of the algorithm's detection ability was superior to that of the doctors., Conclusion: The CXR image-derived deep-learning algorithm had superior pulmonary arterial hypertension detection capability compared with that of experienced doctors., (© 2024. The Author(s).)
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- 2024
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9. Hemostasis with Metallic Stent for Multiple Metastatic Pancreatic Tumors Complicated with Hemobilia.
- Author
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Ito H, Omura Y, Makuuchi T, Chou T, Ito A, Fujimoto R, Yokota M, Tsuda S, Nagata J, Hirose S, Yoshii H, Izumi H, Sugiyama T, Tajiri T, and Suzuki T
- Abstract
Introduction: Hemobilia, which refers to bleeding from the bile duct, is rare and difficult to treat. We report a case of successful hemostasis of a pancreatic tumor complicated by hemobilia., Case Presentation: A 76-year-old man was referred to our hospital with a pancreatic head tumor. Endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasonography-FNA were performed, and the patient was diagnosed with pancreatic metastasis of renal cell carcinoma. After discharge, the patient noted worsening jaundice and progressive anemia and was readmitted. ERCP reveals active bleeding from the duodenal papillae. The patient was placed on a fully covered metallic stent and discharged after confirming hemostasis., Conclusion: Renal cell carcinoma is a tumor with abundant blood flow. If hemobilia occurs, bleeding from pancreatic metastatic tumors should be considered. Additionally, hemostasis using a fully covered metallic stent is useful for treating hemobilia in tumors., Competing Interests: The authors have no conflicts of interest to declare., (© 2024 The Author(s). Published by S. Karger AG, Basel.)
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- 2024
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10. Laparoscopic approach for port site mass diagnosed as a Schloffer tumor following surgery of ascending colon cancer.
- Author
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Mitsuyoshi M, Nagata J, Akiyama Y, Yamauchi M, Sannomiya H, Kohi S, Tanoue T, Mori Y, Sato N, Tamura T, Inoue Y, Sato N, Shibao K, and Hirata K
- Subjects
- Female, Humans, Aged, Fluorodeoxyglucose F18, Colon, Ascending surgery, Positron-Emission Tomography, Colectomy methods, Colonic Neoplasms surgery, Laparoscopy methods
- Abstract
Schloffer tumor is a foreign body granuloma that develops in the subcutaneous layer of the abdomen over several months to several years after surgery due to sutures. Here, we performed a laparoscopic resection for a benign Schloffer tumor that showed positive F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) at the port site of a laparoscopic right hemicolectomy for advanced colon cancer. We report a case in which systemic chemotherapy was avoided as a result of the histological examination following the laparoscopic approach. A 66-year-old female, who underwent laparoscopic right hemi colectomy for stage IIIA ascending colon cancer, was revealed an enhanced mass at the right side of the abdominal subcutaneous layer. PET examination showed a high accumulation of FDG. Laparoscopic tumor resection was performed. Pathological findings reported the formation identical to the Schloffer tumor. Schloffer tumor, which is rare, should be considered as one of the differential diagnoses for tumor with FDG-PET positivity at the port site during the postoperative surveillance period of colorectal cancer., (© 2023 Asia Endosurgery Task Force and Japan Society of Endoscopic Surgery and John Wiley & Sons Australia, Ltd.)
- Published
- 2024
- Full Text
- View/download PDF
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