16 results on '"Yokokawa, H."'
Search Results
2. EXPERIMENTAL VERIFICATION OF THE EFFICACY OF PBCT FROM PHYSICAL AND BIOLOGICAL ASPECTS
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Hosobuchi, M., primary, Kataoka, J., additional, Nishi, F., additional, Tanaka, R., additional, Yokokawa, H., additional, Ueda, M., additional, and Hirayama, R., additional
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- 2022
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3. EPD063 - EXPERIMENTAL VERIFICATION OF THE EFFICACY OF PBCT FROM PHYSICAL AND BIOLOGICAL ASPECTS
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Hosobuchi, M., Kataoka, J., Nishi, F., Tanaka, R., Yokokawa, H., Ueda, M., and Hirayama, R.
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- 2022
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4. Translation and Validation of the Health Literacy Score-14 Questionnaire for Vietnamese Patients with Diabetes.
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Tuan Vo K, Thy Nguyen K, Yokokawa H, Goto A, and Naito T
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Introduction: Health literacy (HL) is a crucial indicator for health promotion and diabetes care improvement, but the available measurements are mostly in English. This study aimed to translate and validate the 14-item Health Literacy Scale (HLS-14) questionnaire from English to Vietnamese for patients with diabetes in Vietnam., Methods: We translated HLS-14 into Vietnamese in accordance with the World Health Organization guidelines and conducted a cross-sectional survey among 571 outpatients with type 2 diabetes using the HLS-14 Vietnamese version (HLS-14 VN). The reliability and validity of the tool were assessed using Cronbach's alpha, composite reliability (CR), average variance extracted (AVE), and maximum shared variance (MSV), and confirmatory analysis was conducted., Results: Cronbach's alpha coefficients for the three subscales as in the original version were 0.931, 0.810, and 0.928 for functional HL, communicative HL, and critical HL, respectively. However, AVE for critical HL was 0.488, which improved to 0.516 after the removal of one item in the communicative HL. For all subscales in the revised 13-item version (HLS-13 VN), CR was above 0.8, AVE was above 0.5, and MSV was less than AVE. Confirmatory analysis of HLS-13 VN revealed an acceptable fit with comparative fit index of 0.983, goodness-of-fit index of 0.963, and root mean squared error of approximation of 0.058., Conclusions: The reliability and validity of HLS-13 VN were confirmed. The tool is suitable for use in clinical settings in Vietnam to assess multidimensional HL in patients with type 2 diabetes., Competing Interests: None, (Copyright © Japan Medical Association.)
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- 2024
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5. Seroprevalence of SARS-CoV-2 antibodies among Japanese healthcare workers from 2020 to 2022 as assayed by two commercial kits.
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Yan Y, Saito K, Naito T, Ito K, Nojiri S, Horiuchi Y, Deshpande GA, Yokokawa H, and Tabe Y
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- Humans, COVID-19 Vaccines, SARS-CoV-2, Japan epidemiology, Longitudinal Studies, Seroepidemiologic Studies, Antibodies, Viral, Health Personnel, Immunoglobulin G, COVID-19 epidemiology, Blood Group Antigens
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Antibody tests are used as surveillance tools for informing health policy making. However, results may vary by type of antibody assay and timing of sample collection following infection. Long-term longitudinal cohort studies on antibody assay seropositivity have remained limited, especially among Asian populations. Using blood samples obtained at health physicals (2020-2022) of healthcare workers (mass vaccinated with mRNA COVID-19 vaccines) at a Japanese medical center, we measured N-specific antibodies using two commercially available systems. Roche Elecsys Anti-SARS-CoV-2 measures total antibodies and Abbott Alinity SARS-CoV-2 IgG measures only IgG. Among 2538 participants, seroprevalence was found to be 16.6% via total antibody assay versus 12.9% by IgG-only (including grayzone) by mid-June 2022. For 219 cases with a previous PCR-confirmed infection, positivity was 97.3% using total antibody assay versus 76.3% using IgG-only assay at the 2022 health physical. Using PCR positive test date as day 0, while the positivity of the total antibody assay was retained for the entire study period (until more than 24-months post-infection), the IgG-only assay's positivity declined after month 4. The Mantel-Haenszel test found a significant difference in the two assays' seropositivity, between stratified groups of "within 3 months" and "4 months or more" from infection (P < 0.001). Our study found significant differences in seropositivity over time of total antibody versus IgG-only assays, suggesting an optimal assay for retaining sensitivity over the entire infection period when designing seroprevalence studies., (© 2024. The Author(s).)
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- 2024
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6. Demographic and clinical characteristics of patients with zinc deficiency: analysis of a nationwide Japanese medical claims database.
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Yokokawa H, Morita Y, Hamada I, Ohta Y, Fukui N, Makino N, Ohata E, and Naito T
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- Aged, Female, Humans, Male, Middle Aged, Cross-Sectional Studies, Demography, Japan epidemiology, Retrospective Studies, Databases, Factual, Malnutrition epidemiology, Zinc deficiency
- Abstract
Zinc deficiency, affecting more than 2 billion people globally, poses a significant public health burden due to its numerous unfavorable effects, such as impaired immune function, taste and smell disorders, pneumonia, growth retardation, visual impairment, and skin disorders. Despite its critical role, extensive large-scale studies investigating the correlation between patient characteristics and zinc deficiency still need to be completed. We conducted a retrospective, cross-sectional observational study using a nationwide Japanese claims database from January 2019 to December 2021. The study population included 13,100 patients with available serum zinc concentration data, excluding individuals under 20 and those assessed for zinc concentrations after being prescribed zinc-containing medication. Significant associations with zinc deficiency were noted among older adults, males, and inpatients. Multivariate analysis, adjusting for age and sex, indicated significant associations with comorbidities, including pneumonitis due to solids and liquids with an adjusted Odds Ratio (aOR) of 2.959; decubitus ulcer and pressure area (aOR 2.403), sarcopenia (aOR 2.217), COVID-19 (aOR 1.889), and chronic kidney disease (aOR 1.835). Significant association with medications, including spironolactone (aOR 2.523), systemic antibacterials (aOR 2.419), furosemide (aOR 2.138), antianemic preparations (aOR 2.027), and thyroid hormones (aOR 1.864) were also found. These results may aid clinicians in identifying patients at risk of zinc deficiency, potentially improving care outcomes., (© 2024. The Author(s).)
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- 2024
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7. A simulation study of in-beam visualization system for proton therapy by monitoring scattered protons.
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Sato S, Yokokawa H, Hosobuchi M, and Kataoka J
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Recently, in-beam positron emission tomography (PET) has been actively researched for reducing biological washout effects and dose monitoring during irradiation. However, the positron distribution does not precisely reflect the dose distribution since positron production and ionization are completely different physical processes. Thus, a novel in-beam system was proposed to determine proton dose range by measuring scattered protons with dozens of scintillation detectors surrounding the body surface. While previous studies conducted a preliminary experiment with a simple phantom, we simulated more complex situations in this paper. Especially, we conducted three stepwise simulation studies to demonstrate the feasibility of the proposed method. First, a simple rectangular phantom was reproduced on simulation and irradiated with protons for obtaining current values and Monte Carlo (MC) dose. Next, we trained a deep learning model to estimate 2-dimensional-dose range (2D-DL dose) from measured current values for simulation (A). We simulated plastic scintillators as detectors to measure the scattered protons. Second, a rectangular phantom with an air layer was used, and 3D-DL dose was estimated in simulation (B). Finally, a cylindrical phantom that mimics the human body was used for confirming the estimation quality of the simulation (C). Consequently, the position of the Bragg peak was estimated with an error of 1.0 mm in simulation (A). In addition, the position of the air layer, as well as the verifying peak position with an error of 2.1 mm, was successfully estimated in simulation (B). Although the estimation error of the peak position was 12.6 mm in simulation (C), the quality was successfully further improved to 9.3 mm by incorporating the mass density distribution obtained from the computed tomography (CT). These simulation results demonstrated the potential of the as-proposed verification system. Additionally, the effectiveness of CT utilization for estimating the DL dose was also indicated., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Sato, Yokokawa, Hosobuchi and Kataoka.)
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- 2023
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8. Association between serum uric acid levels and achievement of target blood pressure among Japanese community residents with hypertension.
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Yokokawa H, Suzuki M, Aoki N, Fukuda H, Sato Y, Hisaoka T, and Naito T
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- Male, Humans, Female, Blood Pressure physiology, Uric Acid, Cross-Sectional Studies, East Asian People, Risk Factors, Hypertension drug therapy, Hypertension epidemiology
- Abstract
The authors examined the sex-specific association between serum uric acid (SUA) levels and achievement of target blood pressure among Japanese patients with hypertension. This cross-sectional study was conducted between January 2012 and December 2015 and examined 17 113 eligible participants (6499 men; 10 614 women) with hypertension among 66 874 Japanese community residents who underwent voluntary health checkups. Multivariate analysis was used to estimate the association between high SUA level (≥7.0 mg/dL for men and ≥6.0 mg/dL for women) and "therapeutic failure" in achieving target blood pressure (BP) of 140/90 and 130/80 mmHg in both sexes. Multivariate analysis revealed that high SUA level was significantly associated with failure to achieve the 130/80 mmHg treatment goal among men (AOR = 1.24, 95% CI = 1.03-1.50, p = .03). Among women, high SUA level was significantly associated with failure to achieve both the 130/80 and 140/90 mmHg treatment goals (AOR = 1.33, 95% CI = 1.20-1.47, p < .01 and AOR = 1.17, 95% CI = 1.04-1.32, p < .01, respectively). Each increase in SUA quartile was positively associated with increases in systolic BP (SBP) and diastolic BP (DBP) (p < .01 for trend) in both sexes. SBP and DBP in each quartile (Q2-Q4) were also significantly higher compared with those of Q1 in both sexes (p < .01). Our data confirms the difficulties in maintain goal BP control in those with elevated SUA., (© 2023 The Authors. The Journal of Clinical Hypertension published by Wiley Periodicals LLC.)
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- 2023
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9. A case of Hirschsprung's disease with segmental dilatation of the colon.
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Yokokawa H, Yoshida M, Takazawa S, Kutsukake M, Omata K, Ogawa S, and Fujishiro J
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Background: Segmental dilatation of the colon (SDC) is a rare disease that is characterized by an abrupt segment of dilated colon between regions of normal-sized colon. We herein report a case of SDC associated with Hirschsprung's disease (HD)., Case Presentation: The patient developed abdominal distension soon after birth, and enema examination showed localized intestinal dilatation from the descending colon to the sigmoid colon with significant caliber changes on both the oral and anal sides of the dilated colon. The findings of the rectal mucosal biopsy were consistent with HD. We considered this case to be a combination of HD and SDC and performed laparoscopic-assisted Soave pull-through with resection of the dilated colon when the patient was 7 months old. Resected specimens showed steep caliber changes on the oral and anal sides of the dilated colon. In the pathological examination, no ganglion cells were found in the submucosa on the anal side of the dilated colon. Based on the above findings, we finally made the diagnosis of HD with SDC., Conclusion: In HD with a characteristic dilated colon, the possibility of SDC should be considered., (© 2023. The Author(s).)
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- 2023
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10. Achievement of target blood pressure among community residents with hypertension and factors associated with therapeutic failure in the northern territory of Japan.
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Yokokawa H, Suzuki M, Aoki N, Sato Y, and Naito T
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- Middle Aged, Aged, Humans, Blood Pressure, Japan epidemiology, Cross-Sectional Studies, Northern Territory, Proteinuria complications, Antihypertensive Agents therapeutic use, Antihypertensive Agents pharmacology, Hypertension complications, Hypertension drug therapy, Renal Insufficiency, Chronic complications
- Abstract
Objective: This study aimed to determine the rate of achieving the target blood pressure (BP) defined by Japanese hypertension management guidelines and to examine factors associated with achieving the target BP., Methods: This cross-sectional study, which was conducted between January 2012 and December 2015, examined the BP control status and associated factors among 9,016 Japanese community residents with hypertension. Residents were divided into the following six groups: G1, young, middle-aged, and early-phase elderly patients; G2, patients with cerebrovascular disease; G3, patients with coronary artery disease; G4, patients with chronic kidney disease with proteinuria; G5, patients with diabetes; and G6, patients with chronic kidney disease without proteinuria. BP target achievement rates were calculated for each group. A multivariate analysis identified factors associated with "therapeutic failure" of target BP., Results: The target BP was achieved by 52.6% participants in G1, 84.3% in G2, 50.6% in G3, 45.6% in G4, 48.7% in G5, and 75.0% in G6. The body mass index and receiving antilipidemic medication were associated with therapeutic failure., Conclusion: This study shows that achievement rates for treatment goals among Japanese patients with hypertension are still low. Body mass index and treatment of dyslipidemia may be associated with the control of BP.
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- 2022
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11. Patient-derived monoclonal antibody neutralizes HCV infection in vitro and vivo without generating escape mutants.
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Yokokawa H, Shinohara M, Teraoka Y, Imamura M, Nakamura N, Watanabe N, Date T, Aizaki H, Iwamura T, Narumi H, Chayama K, and Wakita T
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- Animals, Antibodies, Monoclonal, Antibodies, Neutralizing, Antiviral Agents metabolism, Epitopes, Hepacivirus, Hepatitis C Antibodies, Humans, Mice, Peptide Library, Viral Envelope Proteins, Hepatitis C, Hepatitis C, Chronic
- Abstract
In recent years, new direct-acting antivirals for hepatitis C virus (HCV) have been approved, but hepatitis C continues to pose a threat to human health. It is important to develop neutralizing anti-HCV antibodies to prevent medical and accidental infection, such as might occur via liver transplantation of chronic HCV patients and needle-stick accidents in the clinic. In this study, we sought to obtain anti-HCV antibodies using phage display screening. Phages displaying human hepatocellular carcinoma patient-derived antibodies were screened by 4 rounds of biopanning with genotype-1b and -2a HCV envelope E2 protein adsorbed to magnetic beads. The three antibodies obtained from this screen had reactivity against E2 proteins derived from both genotype-1b and -2a strains. However, in epitope analysis, these antibodies did not recognize linear peptides from an overlapping E2 epitope peptide library, and did not bind to denatured E2 protein. In addition, these antibodies showed cross-genotypic neutralizing activity against genotype-1a, -1b, -2a, and -3a cell culture-generated infectious HCV particles (HCVcc). Moreover, emergence of viral escape mutants was not observed after repeated rounds of passaging of HCV-infected cells in the presence of one such antibody, e2d066. Furthermore, injection of the e2d066 antibody into human hepatocyte-transplanted immunodeficient mice inhibited infection by J6/JFH-1 HCVcc. In conclusion, we identified conformational epitope-recognizing, cross-genotypic neutralizing antibodies using phage display screening. Notably, e2d066 antibody did not select for escape mutant emergence in vitro and demonstrated neutralizing activity in vivo. Our results suggested that these antibodies may serve as prophylactic and therapeutic agents., Competing Interests: Hiroshi Yokokawa, Noriko Nakamura, Tomokatsu Iwamura, and Hideki Narumi are employees of Toray Industries, Inc. Midori Shinohara is an employee of Medical & Biological Laboratories Co., Ltd. The researchers were employed by these commercial funders and received funding for patent rights to this research. This study was patent filed in 2015 (WO2015/141826), but the rights application was withdrawn in 2018. The researchers and commercial funders do not benefit from the submission of this study to PLOS ONE. This does not alter our adherence to PLOS ONE policies on sharing data and materials.
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- 2022
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12. Relief Effect of Carbon Dioxide Insufflation in Transnasal Endoscopy for Health Checks-A Prospective, Double-Blind, Case-Control Trial.
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Fujisawa T, Fukuda H, Sakamoto N, Hojo M, Tomishima K, Ishii S, Yokokawa H, Saita M, Naito T, Nagahara A, Watanabe S, and Isayama H
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CO2 insufflation has proven effective in reducing patients’ pain after colonoscopies but has not been examined in esophagogastroduodenoscopies. Therefore, we examined the effect of CO2 insufflation in examinees who underwent transnasal endoscopies without sedation. This study is a single-center, prospective, double-blind, case-control trial conducted between March 2017 and August 2018. Subjects were assigned weekly to receive insufflation with either CO2 or air. The primary outcome was improvement of abdominal pain and distension at 2 h and 1-day postprocedure. In total, 336 and 338 examinees were assigned to the CO2 and air groups, respectively. Visual analog scale (VAS) scores for abdominal distension (15.4 vs. 25.5; p < 0.001) and distress from flatus (16.0 vs. 28.8; p < 0.001) at 2 h postprocedure were significantly reduced in the CO2 group. VAS scores for pain during the procedure (33.5 vs. 37.1; p = 0.059) and abdominal pain after the procedure (3.9 vs. 5.7; p = 0.052) also tended to be lower at 2 h postprocedure, but all parameters showed no significant difference at 1-day postprocedure. All procedures were safely completed through the planned program, and no apparent adverse events requiring treatment or follow-up occurred. In conclusion, CO2 insufflation may reduce postprocedural abdominal discomfort from transnasal esophagogastroduodenoscopies. (UMIN000028543).
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- 2022
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13. The Neural Correlates of Semantic and Grammatical Encoding During Sentence Production in a Second Language: Evidence From an fMRI Study Using Structural Priming.
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Nakagawa E, Koike T, Sumiya M, Shimada K, Makita K, Yoshida H, Yokokawa H, and Sadato N
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Japanese English learners have difficulty speaking Double Object (DO; give B A) than Prepositional Object (PO; give A to B) structures which neural underpinning is unknown. In speaking, syntactic and phonological processing follow semantic encoding, conversion of non-verbal mental representation into a structure suitable for expression. To test whether DO difficulty lies in linguistic or prelinguistic process, we conducted functional magnetic resonance imaging. Thirty participants described cartoons using DO or PO, or simply named them. Greater reaction times and error rates indicated DO difficulty. DO compared with PO showed parieto-frontal activation including left inferior frontal gyrus, reflecting linguistic process. Psychological priming in PO produced immediately after DO and vice versa compared to after control, indicated shared process between PO and DO. Cross-structural neural repetition suppression was observed in occipito-parietal regions, overlapping the linguistic system in pre-SMA. Thus DO and PO share prelinguistic process, whereas linguistic process imposes overload in DO., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Nakagawa, Koike, Sumiya, Shimada, Makita, Yoshida, Yokokawa and Sadato.)
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- 2022
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14. Barriers to Prevention and Treatment of Type 2 Diabetes Mellitus Among Outpatients in Belarus.
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Sachkouskaya A, Sharshakova T, Kovalevsky D, Rusalenko M, Savasteeva I, Goto A, Yokokawa H, Kumagai A, and Takahashi J
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Objectives: This study aimed to determine the main barriers and reasons for non-adherence to preventive measures and treatment for type 2 diabetes mellitus among outpatients in Belarus., Methods: An anonymous questionnaire survey was conducted with 814 adults aged 18 years and over who visited outpatient health care units and hospitals in Belarus. The questionnaire was developed to analyze the perceived barriers that limit adherence to preventive measures and treatment for type 2 diabetes., Results: The proportion of respondents who reported doing daily physical activity was 53.2%, and 46.6% consumed at least 400 grams of fruit and vegetables per day. Among the 42.8% of respondents with a prescribed treatment for type 2 diabetes mellitus, 50.1% sometimes forgot to take their medicine. The specific barriers to treatment most frequently identified by survey respondents were "Financial situation" (23.5% of respondents), and "Fear of side effects" (25.2%). Those for lifestyle instructions were "Insufficient knowledge" (29.3%), "Financial situation" (27.9%), and "Lack of motivation" (21.7%)., Conclusions: The study revealed that the main barriers to adherence were insufficient knowledge of diabetes and its treatment and an underestimation of the role of behavioral risk factors in health, combined with financial difficulties. We recommend that physicians should take a patient-centered approach to raising awareness of behavioral risk factors for type 2 diabetes mellitus, and suggest that the importance of adhering to preventative measures and treatment should be promoted in consultations in Belarus., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Sachkouskaya, Sharshakova, Kovalevsky, Rusalenko, Savasteeva, Goto, Yokokawa, Kumagai and Takahashi.)
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- 2022
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15. [A Case of Long-Term Survival after Administration of Regorafenib for Stage Ⅳ Colorectal Cancer].
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Kono T, Yokokawa H, Miyano Y, Oyama K, Yoshimatsu K, Koike T, and Shiozawa S
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- Aged, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Bevacizumab therapeutic use, Humans, Leucovorin therapeutic use, Male, Phenylurea Compounds therapeutic use, Pyridines, Colorectal Neoplasms drug therapy, Fluorouracil therapeutic use
- Abstract
The patient was a 65-year-old man for whom a right hemicolectomy was performed for transverse colon cancer and multiple lymph node metastases. Peritoneal dissemination was observed throughout the abdominal cavity, and curative resection was not possible. Postoperative diagnosis: pT4bN2M1c(P3), Stage Ⅳc, and mutant RAS status. Therapy consisting of mFOLFOX6 plus bevacizumab was started 1 month after surgery, and up to 25 courses were completed. FOLFIRI plus bevacizumab therapy was performed up to 13 courses as the second-line therapy. Regorafenib 80 mg/day was started as the third-line therapy and the dose was gradually increased. It was performed up to 14 courses for about 13 months, without major adverse events, to keep the disease stable or slow its progression. Although up to 5 courses of FTD/TPI plus bevacizumab therapy were delivered as the fourth-line therapy, he died of disease progression. Regorafenib, which has been approved as a salvage line for metastatic colorectal cancer, features many adverse events, and there are few cases in which the approved dose can be administered. In our case, starting at a low dose resulted in fewer adverse events, adequate disease control, and long-term administration.
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- 2021
16. Efficacy and safety of semaglutide in glycemic control, body weight management, lipid profiles and other biomarkers among obese type 2 diabetes patients initiated or switched to semaglutide from other GLP-1 receptor agonists.
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Okamoto A, Yokokawa H, Nagamine T, Fukuda H, Hisaoka T, and Naito T
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Purpose: Evidence of the efficacy and safety of semaglutide among patients with type 2 diabetes who were initiated on or were switched to semaglutide from other GLP-1 RAs remains limited. The objective of this study was to investigate the short-term effects of switching to semaglutide from other GLP-1 RAs., Methods: This retrospective cohort study evaluated patients with type 2 diabetes who were initiated on or were switched to semaglutide due to poor diabetes control with other GLP-1 RAs or other medications, or obesity. HbA1c, body weight, serum creatinine, serum uric acid, parameters of lipid metabolism, and parameters of liver function were measured before and 6 months after administration of semaglutide., Results: A total of 50 patients were registered in the study. After switching to semaglutide (n = 43), HbA1c and body weight significantly decreased ( p < 0.01, p < 0.01), respectively. The same findings were observed in semaglutide-naïve patients ( p = 0.04, p < 0.02) (n = 7). Serum uric acid, total cholesterol, triglycerides, and urinary albumin-creatinine ratio decreased significantly as well ( p = 0.04, p = 0.04, p = 0.02, p = 0.04), whereas serum creatinine did not change significantly ( p = 0.51)., Conclusions: Semaglutide showed excellent efficacy, even in patients switched from other GLP-1 RAs. Semaglutide appears to be a promising agent for blood glucose and body weight control in obese type 2 diabetes mellitus patients and could be more potent in treating type 2 diabetes than existing GLP-1 RAs., Competing Interests: Conflict of interestThe all authors have no conflicts of interest to declare., (© The Author(s) 2021.)
- Published
- 2021
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