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Shih YW, Chang CW, Chang HCR, Tsai JR, Wang WJ, Fang HF, Lin CL, Rias YA, Tsai HT. Mediating Effect of White Blood Cells and Tobacco Exposure on Cervical Neoplasm Risk Among Taiwanese Women. Biol Res Nurs 2024:10998004241229069. [PMID: 38271218 DOI: 10.1177/10998004241229069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Background: Both the high-risk human papillomavirus (HR-HPV) infection and tobacco exposure are significantly associated with cervical neoplasm risk. Immune cells play important roles in carcinogenesis. However, it is still unclear whether immune cells have a mediating effect on the HR-HPV infection and tobacco exposure with cervical neoplasm development. Aim: The aim of this study was to determine how the increased white blood cell (WBC) count affects the relationship between HR-HPV DNA load and tobacco exposure in the development of cervical neoplasia. Methods: A hospital-based case-control study design was conducted with a total of 108 cases of Taiwanese women with ≥ cervical intraepithelial neoplasia (CIN) I confirmed by biopsy, and 222 healthy Taiwanese female subjects with negative findings on a Pap smear were assigned to the control group. The study evaluated HR-HPV status and immune cell counts (WBCs, natural killer (NK) cells) and tobacco exposure by a self-construct questionnaire. Results: Both HR-HPV DNA load and tobacco exposure significantly independently increased cervical neoplasm risk (AORs: 1.28 and 1.42, respectively). Similar significant results were found for WBCs and NK cells, with respective AORs of 1.20 and 1.00. Moreover, increased WBCs (β = 0.04, 95% CI corrected: 0.01-0.07) and tobacco exposure (β = 0.02, 95% CI corrected: 0.01-0.04) mediated the relationship between the high-risk HPV DNA load and cervical neoplasm risk. Conclusions: Elevated WBC count acts as both predictor and mediator in cervical neoplasm development linked to HR-HPV DNA load. Monitoring and maintaining WBC levels within the normal range could be a preventive strategy for cervical neoplasm development.
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Affiliation(s)
- Ya Wen Shih
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
- Post‑Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Ching Wen Chang
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan
| | | | - Jia Ruey Tsai
- Department of Medical Oncology, Taipei Medical University Taipei Cancer Center/Taipei Medical University Hospital, Taipei, Taiwan
| | - Wei-Jun Wang
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan
- Proton Center, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hui Fen Fang
- Department of Nursing, Taipei Medical University Taipei Cancer Center/Taipei Medical University Hospital, Taipei, Taiwan
| | - Chia Ling Lin
- Department of Pharmacy, MacKay Memorial Hospital, Taipei, Taiwan
| | - Yohanes Andy Rias
- Faculty of Nursing, Chulalongkorn University, Bangkok, Thailand
- Faculty of Health, College of Nursing, Institut Ilmu Kesehatan Bhakti Wiyata Kediri, Kediri, Indonesia
| | - Hsiu Ting Tsai
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
- Post‑Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
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Hung MH, Chang CW, Wang KC, Chaisaingmongkol J, Ruchirawat M, Greten TF, Wang XW. Purine anabolism creates therapeutic vulnerability in hepatocellular carcinoma through m 6 A-mediated epitranscriptomic regulation. Hepatology 2023; 78:1462-1477. [PMID: 37094826 PMCID: PMC10593095 DOI: 10.1097/hep.0000000000000420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 04/10/2023] [Indexed: 04/26/2023]
Abstract
BACKGROUND AND AIMS Purines are building blocks for the cellular genome, and excessive purine nucleotides are seen in tumors. However, how purine metabolism is dysregulated in tumors, and impacting tumorigenesis remains elusive. APPROACH AND RESULTS Transcriptomic and metabolomic analyses of purine biosynthesis and purine degradation pathways were performed in the tumor and associated nontumor liver tissues obtained from 62 patients with HCC, one of the most lethal cancers worldwide. We found that most genes in purine synthesis are upregulated, while genes in purine degradation are inhibited in HCC tumors. High purine anabolism is associated with unique somatic mutational signatures linked to patient prognosis. Mechanistically, we discover that increasing purine anabolism promotes epitranscriptomic dysregulation of DNA damage repairing (DDR) machinery through upregulating RNA N6-methyladenosine (m 6 A) modification. High purine anabolic HCC is sensitive to DDR-targeting agents but not to standard HCC treatments, correlating with the clinical outcomes in 5 independent HCC cohorts containing 724 patients. We further showed that high purine anabolism determines the sensitivity to DDR-targeting agents in 5 HCC cell lines in vitro and in vivo . CONCLUSIONS Our results reveal a central role of purine anabolism in regulating DDR, which could be therapeutically exploited in HCC.
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Affiliation(s)
- Man Hsin Hung
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Ching Wen Chang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Kathy Cheng Wang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Jittiporn Chaisaingmongkol
- Laboratory of Chemical Carcinogenesis, Chulabhorn Research Institute, Bangkok 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, Thailand
| | - Mathuros Ruchirawat
- Laboratory of Chemical Carcinogenesis, Chulabhorn Research Institute, Bangkok 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology (EHT), OPS, MHESI, Thailand
| | - Tim F. Greten
- Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
- Lead contact
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Chang CW, Goette M, Kadom N, Wang Y, Wynne JF, Wang T, Liu T, Esiashvili N, Zhou J, Eaton BR, Yang X. Using Longitudinal MRI to Manage Proton Range Uncertainty for Pediatric Proton Craniospinal Irradiation. Int J Radiat Oncol Biol Phys 2023; 117:e505-e506. [PMID: 37785585 DOI: 10.1016/j.ijrobp.2023.06.1756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Clinical evidence has shown that proton therapy can effectively reduce side effects for pediatric patients undergoing vertebral body-sparing craniospinal irradiation (VBS CSI), compared to conventional photon treatment modalities. However, radiation-induced growth impairment remains challenging for VBS CSI due to proton range uncertainty, compromising vertebral body sparing for growing children. Previous studies have shown that fatty marrow replacement can be observed in vertebral bodies 4-48 weeks after treatment is complete. This study aims to detect and quantify the fatty marrow replacement in vertebral bodies using longitudinal magnetic resonance (MR) to manage proton range uncertainty. MATERIALS/METHODS A prospective clinical trial of proton VBS CSI was designed, and ten pediatric patients were enrolled with prescribed doses of 15-36 Gy. The thecal sac and neural foramina were the clinical target volumes, and a Monte Carlo planning system was used to robustly optimize treatment plans with a 3.5% range margin. We analyzed patients' T1/T2 MR images acquired before, during, and after proton treatment to investigate the hematopoietic marrow transformation induced by irradiation. A metric was defined to calculate the ratio of fatty and hematopoietic marrow based on relative MR intensity histograms. We proposed a machine learning method via Gaussian fitting process (ML-GFP) to explore hidden correlations between marrow transition and radiation dose to 2 cm3 of the bone marrow (D2cc). We also leveraged this method to embed uncertainty to support potential proton range management for VBS enhancement. RESULTS The results indicated that fatty marrow replacement could be observed during inter-fractional treatment. For instance, an individual patient showed that the fatty marrow generation ratios were 0.54, 0.74, and 0.45, corresponding to 11, 18, and 65 days after the treatment started. Using ML-GFP, the fatty marrow transition was found to be quadratically correlated to treatment fractions, and the maximum transformation ranged from 40 to 50 days. Then marrow regeneration was observed due to the decrease in fatty marrow ratios. The fatty marrow ratios were also positively correlated to the D2cc doses ranging from 10 Gy to 36 Gy. Limited by insufficient low-dose data, the ML-GFP model extrapolated the data to predict the marrow transformation below 10 Gy. CONCLUSION We demonstrated the feasibility of using non-invasive longitudinal MR to quantify the fatty marrow transition from inter-fractional treatment. Based on this prospective study, the method can detect early fatty marrow generation in vertebrae caused by proton irradiation due to the conservative range margin used for robust optimization. The proposed method could be used to validate the actual proton range, allowing an accurate range margin to be defined to preserve bone marrow. Future investigation will likely focus on clinical implementation to improve life quality for pediatric CSI patients.
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Affiliation(s)
| | | | - N Kadom
- Emory University, Atlanta, GA
| | - Y Wang
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - J F Wynne
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - T Wang
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - T Liu
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - N Esiashvili
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - J Zhou
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - B R Eaton
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - X Yang
- Department of Radiation Oncology, Emory University, Atlanta, GA
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Chang CW, Bohannon D, Tian Z, Wang Y, McDonald MW, Yu DS, Liu T, Zhou J, Yang X. Estimating Potential Benefits of Online Adaptive Proton Therapy for Head-and-Neck Cancer: A Retrospective Study. Int J Radiat Oncol Biol Phys 2023; 117:e649. [PMID: 37785928 DOI: 10.1016/j.ijrobp.2023.06.2069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Proton therapy is highly sensitive to anatomical changes and setup variations in head-and-neck (HN) treatments. To address this issue, proton centers often acquire patient CT images weekly to monitor patient anatomical changes during the treatment course and perform offline plan adaptation when needed. However, offline adaptation cannot fully account for daily setup variations or the anatomical changes occurring with high frequency. There are a few groups endeavoring to develop advanced technologies to enable online adaptive proton therapy (APT). However, the necessity of online APT remains controversial, as it is unknown that whether online APT will significantly improve treatment quality and outcomes compared to offline APT. The purpose of this study is to estimate the clinical potential of online APT in the management of HN cancers in relation to the current offline APT. MATERIALS/METHODS Our retrospective study was conducted with four HN patients (35 fractions per patient), who had been treated with intensity modulated proton therapy and had offline adaptation once or twice during their treatment courses. Synthetic CT (sCT) images were generated from 140 daily CBCT images for us to recalculate the dose of the treatment plan in patient's actual treatment anatomy for each treatment fraction and adapt the plan when warranted. These adaptations were assumed to be performed online before treatment delivery to mimic an online APT course. Accumulative doses were calculated for both courses using the CBCT-based sCT images of every fraction for us to compare the target coverage, organ at risk (OAR) sparing, tumor control probability (TCP) and normal tissue complication probability (NTCP). An in-house script was developed to semi-automate this process in a commercial treatment planning system to facilitate our study. RESULTS All patients would benefit from online APT to different extents. For the first patient, with OAR doses comparable to the actual offline course, the retrospective online APT course improved dose coverages of the three CTVs from 95.2%, 98.64% and 89.53% to 98.88%, 99.81%, 98.97%, which would lead to a 4.52% improvement in TCP. Similarly, online APT would yield a 2.66% improvement in TCP for the second patient. For the third patient, with comparable CTV dose coverages, the mean doses of right parotid and oral cavity were decreased from 29.52 Gy relative biological effectiveness (RBE) and 41.89 Gy RBE to 22.16 Gy RBE and 34.61 Gy RBE, leading to a reduce of 1.67% and 3.40% in NTCP. The mean dose of right parotid was decreased from 21.71 Gy RBE to 19.37 Gy RBE for the last patient, leading to a reduce of 0.73% in NTCP. CONCLUSION Our results showed that online APT could better maintain the treatment plan quality than offline APT for all the four patients, despite their significant anatomical changes. Future investigation will focus on collecting more patient data to obtain statistically significant results and help identify the patients to whom the online APT will be of most benefit.
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Affiliation(s)
| | - D Bohannon
- Department of Medical Physics, Georgia Institute of Technology, Atlanta, GA
| | | | - Y Wang
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - M W McDonald
- Winship Cancer Institute of Emory University, Department of Radiation Oncology, Atlanta, GA
| | - D S Yu
- Emory University, Atlanta, GA
| | - T Liu
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - J Zhou
- Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, GA
| | - X Yang
- Department of Radiation Oncology, Emory University, Atlanta, GA
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Shih YW, Wang MH, Monsen KA, Chang CW, Rias YA, Tsai HT. Effectiveness of Acupuncture for Relieving Chemotherapy-Induced Bone Marrow Suppression: A Systematic Review with a Meta-analysis and Trial Sequential Analysis. J Integr Complement Med 2023; 29:621-636. [PMID: 37163212 DOI: 10.1089/jicm.2022.0735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Objective: Bone marrow suppression is the most common side effect of chemotherapy that may lead to discontinuation for treatment pertaining to patients during the therapy course. Acupuncture may relieve bone marrow suppression with regulation hematopoietic function during chemotherapy. The purpose of this study is to evaluate the effectiveness of acupuncture in relieving chemotherapy-induced bone marrow suppression and determine the effects of acupuncture on bone marrow function. Design: PubMed, Embase, Cochrane Library, Medline OVID, CINAHL Plus, Web of Science, and Chinese articles in the Airiti Library and China National Knowledge Infrastructure databases were searched up to February 2023. Publications in both English and Chinese were eligible for inclusion without any limitations on the publication date. Only randomized controlled trials investigating the impact of acupuncture on chemotherapy-induced bone marrow suppression were considered. In addition, a trial sequential analysis was performed to assess the adequacy of the current sample size. Results: A total of 25 studies met the inclusion criteria. Acupuncture was found to increase the levels of hematopoietic cytokine granulocyte colony-stimulating factor (G-CSF) (Hedges' g = 0.79, p < 0.001), as well as stimulate the production of white blood cells (Hedges' g = 0.69, p < 0.001), red blood cells (Hedges' g = 0.37, p = 0.01), neutrophils (Hedges' g = 0.66, p < 0.001), absolute neutrophil count (Hedges' g = 0.89, p = 0.01), hemoglobin (Hb) (Hedges' g = 0.37, p = 0.02), platelets (Hedges' g = 0.50, p < 0.001), and natural killer (NK) cells (Hedges' g = 1.30, p = 0.02). Further, the levels of platelets and NK cells were observed to increase cumulatively over time. Conclusions: Acupuncture may improve chemotherapy-induced bone marrow suppression due to increasing levels of the hematopoietic cytokine, G-CSF and further relieving chemotherapy-induced bone marrow suppression. PROSPERO Registration: This review was registered with PROSPERO (International Prospective Register of Systematic Reviews: CRD42020185813).
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Affiliation(s)
- Ya Wen Shih
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
- Post-BaccalaureateProgram in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Mei Hua Wang
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
| | - Karen A Monsen
- School of Nursing, University of Minnesota, Minneapolis, MN, USA
| | - Ching Wen Chang
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yohanes Andy Rias
- Faculty of Health and Medicine, College of Nursing, InstitutIlmu Kesehatan Bhakti Wiyata, Kediri, Indonesia
| | - Hsiu Ting Tsai
- Post-BaccalaureateProgram in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
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Chang CW, Wang HW, Huang WH, Chuang PH. Unusual upper gastrointestinal bleeding following radiofrequency ablation and transarterial chemoembolization for hepatocellular carcinoma. J Postgrad Med 2023; 69:237-238. [PMID: 36861547 PMCID: PMC10846808 DOI: 10.4103/jpgm.jpgm_764_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 11/15/2021] [Accepted: 12/09/2021] [Indexed: 02/25/2023] Open
Affiliation(s)
- CW Chang
- Department of Internal Medicine, Center for Digestive Medicine, China Medical University Hospital, Taichung, Taiwan
| | - HW Wang
- Department of Internal Medicine, Center for Digestive Medicine, China Medical University Hospital, Taichung, Taiwan
| | - WH Huang
- Department of Internal Medicine, Center for Digestive Medicine, China Medical University Hospital, Taichung, Taiwan
| | - PH Chuang
- Department of Internal Medicine, Center for Digestive Medicine, China Medical University Hospital, Taichung, Taiwan
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Bohannon D, Janopaul-Naylor J, Rudra S, Yang X, Chang CW, Wang Y, Ma C, Patel SA, McDonald MW, Zhou J. Prediction of plan adaptation in head and neck cancer proton therapy using clinical, radiographic, and dosimetric features. Acta Oncol 2023:1-8. [PMID: 37335043 DOI: 10.1080/0284186x.2023.2224050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 06/01/2023] [Indexed: 06/21/2023]
Abstract
PURPOSE Because proton head and neck (HN) treatments are sensitive to anatomical changes, plan adaptation (re-plan) during the treatment course is needed for a significant portion of patients. We aim to predict re-plan at plan review stage for HN proton therapy with a neural network (NN) model trained with patients' dosimetric and clinical features. The model can serve as a valuable tool for planners to assess the probability of needing to revise the current plan. METHODS AND MATERIALS Mean beam dose heterogeneity index (BHI), defined as the ratio of the maximum beam dose to the prescription dose, plan robustness features (clinical target volume (CTV), V100 changes, and V100 > 95% passing rates in 21 robust evaluation scenarios), as well as clinical features (e.g., age, tumor site, and surgery/chemotherapy status) were gathered from 171 patients treated at our proton center in 2020, with a median age of 64 and stages from I-IVc across 13 HN sites. Statistical analyses of dosimetric parameters and clinical features were conducted between re-plan and no-replan groups. A NN was trained and tested using these features. Receiver operating characteristic (ROC) analysis was conducted to evaluate the performance of the prediction model. A sensitivity analysis was done to determine feature importance. RESULTS Mean BHI in the re-plan group was significantly higher than the no-replan group (p < .01). Tumor site (p < .01), chemotherapy status (p < .01), and surgery status (p < .01) were significantly correlated to re-plan. The model had sensitivities/specificities of 75.0%/77.4%, respectively, and an area under the ROC curve of .855. CONCLUSION There are several dosimetric and clinical features that correlate to re-plans, and NNs trained with these features can be used to predict HN re-plans, which can be used to reduce re-plan rate by improving plan quality.
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Affiliation(s)
- D Bohannon
- Department of Nuclear and Radiological Engineering, Georgia institute of Technology, Atlanta, GA, USA
| | - J Janopaul-Naylor
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - S Rudra
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - X Yang
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - C W Chang
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - Y Wang
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - C Ma
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - S A Patel
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - M W McDonald
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
| | - J Zhou
- Department of Radiation Oncology, Emory University, Atlanta, GA, USA
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Hung MH, Chang CW, Wang KC, Chaisaingmongkol J, Ruchirawat M, Greten TF, Wang XW. Abstract 3683: Activation of purine anabolism creates a therapeutic vulnerability in hepatocellular carcinoma via m6A-mediated epitranscriptomic regulation. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-3683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
Introduction Purines are building blocks for genomics and the abundance of purine nucleotides is controlled by purine synthesis and purine degradation. Imbalance of purine nucleotide pool in tumors has been shown, but how synthesis and degradation of purine integrates in tumors has not been well characterized. Hepatocellular carcinoma (HCC) is the most common liver cancer with a high mortality rate and limited treatments. Aberrant purine metabolism was observed in HCC, but the functional status of global purine metabolism in HCC and how that drive HCC fitness and therapeutic response remain unclear. Method HCC-specific purine metabolic changes were identified from the transcriptomic and metabolic data of tumor and paired non-tumor liver tissues obtained from 62 HCC patients from Thailand (discovery cohort) and validated in an additional 672 HCC with different race/ethnicities and etiologies. Correlation analysis of purine metabolic alteration and tumor-associated genomic, transcriptome and metabolome were conducted. The impacts of purine metabolism on HCC survival and therapeutic vulnerability were investigated. Biological functions of purine metabolic alterations were assessed in vitro and in vivo on multiple HCC cell lines. Results Using multi-omics integrative analyses, we found a tumor-specific activation of purine anabolism, induced by upregulation of purine de novo biosynthesis and inhibition of purine degradation, in HCC. A high purine anabolic status was associated with dysregulation of the DNA damage repairing (DDR) machinery in HCC, accompanied by unique somatic mutational signatures linked to patient prognosis. By examining drug responses to 180 molecular targeted agents in HCC cells, we found that increasing purine anabolism induced a therapeutic vulnerability of HCC to DDR targeting agents. Mechanistically, we found that excessive purine metabolites induced N6-methyladenosine (m6A) modification on DTL, a DDB1 cullin4 associated factor, thereby delaying the degradation of DTL mRNA transcriptomic remodeling of the DDR machinery and tumor fitness. Experimentally, we demonstrated that suppressing purine anabolism or exposing to DDR targeting agent, such as berzosertib, inhibited the growth of HCCs with high purine anabolism in vitro and in vivo. Conclusion Our study suggests that targeting purine anabolism or DDR may represent as attractive strategies in patients with high purine anabolic HCCs, and purine anabolic status could be a valuable biomarker to allocate systemic treatments for patients with advanced HCC.
Citation Format: Man-Hsin Hung, Ching Wen Chang, Kathy Cheng Wang, Jittiporn Chaisaingmongkol, Mathuros Ruchirawat, Tim F. Greten, Xin Wei Wang. Activation of purine anabolism creates a therapeutic vulnerability in hepatocellular carcinoma via m6A-mediated epitranscriptomic regulation. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 3683.
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Handayani S, Rias YA, Kurniasari MD, Agustin R, Rosyad YS, Shih YW, Chang CW, Tsai HT. Relationship of spirituality, health engagement, health belief and attitudes toward acceptance and willingness to pay for a COVID-19 vaccine. PLoS One 2022; 17:e0274972. [PMID: 36223417 PMCID: PMC9555617 DOI: 10.1371/journal.pone.0274972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 09/07/2022] [Indexed: 11/18/2022] Open
Abstract
PURPOSE To explore the wider determinant factor of citizens' spirituality, health engagement, health belief model, and attitudes towards vaccines toward acceptance and willingness to pay for a Coronavirus disease 2019 (COVID-19) vaccination. METHODS A community-based cross-sectional online investigation with convenience sampling was utilized to recruit 1423 citizens from 18 districts across Indonesia between December 14, 2020 and January 17, 2021. Descriptive statistics, One-way analysis of variance, Pearson correlation, Independent t-tests, and multiple linear regression were examined. RESULTS Spirituality, health engagement and attitude toward vaccines, as well as health beliefs constructs (all scores of perceived benefits and barriers) were significant key factors of acceptance of vaccines. Interestingly, the spirituality, attitude toward vaccine, and health beliefs constructs including perceived susceptibility, and benefits indicated a significantly higher willingness. CONCLUSIONS Results demonstrated the utility of spirituality, health engagement, health belief model, and attitudes towards vaccines in understanding acceptance and willingness to pay for a vaccine. Specifically, a key obstacle to the acceptance of and willingness to pay COVID-19 vaccination included a high score of the perceived barrier construct. Moreover, the acceptance of and willingness to pay could be impaired by worries about the side-effects of a COVID-19 vaccination.
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Affiliation(s)
- Sri Handayani
- Faculty of Health and Medicine, College of Nursing, Sekolah Tinggi Ilmu Kesehatan Yogyakarta, Yogyakarta, Indonesia
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
| | - Yohanes Andy Rias
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
- Faculty of Health and Medicine, College of Nursing, Institut Ilmu Kesehatan Bhakti Wiyata Kediri, Kediri, Indonesia
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
| | - Maria Dyah Kurniasari
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
| | - Ratna Agustin
- Faculty of Health and Medicine, College of Nursing, Universitas Muhammadiyah Surabaya, Surabaya, Indonesia
| | - Yafi Sabila Rosyad
- Faculty of Health and Medicine, College of Nursing, Sekolah Tinggi Ilmu Kesehatan Yogyakarta, Yogyakarta, Indonesia
| | - Ya Wen Shih
- School of Nursing, National Taipei University of Nursing and Health Science, Taipei, Taiwan, R.O.C
| | - Ching Wen Chang
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan, R.O.C
| | - Hsiu Ting Tsai
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
- * E-mail: ,
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Liu N, Chang CW, Steer CJ, Wang XW, Song G. MicroRNA-15a/16-1 Prevents Hepatocellular Carcinoma by Disrupting the Communication Between Kupffer Cells and Regulatory T Cells. Gastroenterology 2022; 162:575-589. [PMID: 34678217 DOI: 10.1053/j.gastro.2021.10.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 10/05/2021] [Accepted: 10/14/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Hepatocellular carcinoma (HCC) is characterized by intratumoral accumulation of regulatory T cells (Tregs), which suppresses antitumor immunity. This study was designed to investigate how microRNAs regulate immunosuppression in HCC. METHODS FVB/NJ mice were hydrodynamically injected with AKT/Ras or c-Myc and Sleeping Beauty transposon to induce HCC. The Sleeping Beauty system was used to deliver microRNA-15a/16-1 into livers of mice. Flow cytometry and immunostaining were used to determine changes in the immune system. RESULTS Hydrodynamic injection of AKT/Ras or c-Myc into mice resulted in hepatic enrichment of Tregs and reduced cytotoxic T cells (CTLs) and HCC development. HCC impaired microRNA-15a/16-1 biogenesis in Kupffer cells (KCs) of AKT/Ras and c-Myc mice. Hydrodynamic injection of microRNA-15a/16-1 fully prevented HCC in AKT/Ras and c-Myc mice, while 100% of control mice died of HCC. Therapeutically, microRNA-15a/16-1 promoted a regression of HCC in both mouse models, impaired hepatic enrichment of Tregs, and increased hepatic CTLs. Mechanistically, a significant increase was observed in serum C-C motif chemokine 22 (CCL22) and transcription of Ccl22 in KCs of AKT/Ras and c-Myc mice. MicroRNA-15a/16-1 prevented KCs from overproducing CCL22 by inhibiting nuclear factor-κB that activates transcription of Ccl22. By reducing CCL22 binding to C-C chemokine receptor type 4 on Tregs, microRNA-15a/16-1 impaired Treg chemotaxis. Disrupting the interaction between microRNA-15a/16-1 and nuclear factor-κB impaired the ability of microRNA-15a/16-1 to prevent hepatic Treg accumulation and HCC. Depletion of cluster of differentiation 8+ T cells and additional treatment of CCL22 recovered growth of HCC that was fully prevented by microRNA-15a/16. CONCLUSIONS MicroRNA-15a/16-1 attenuates immunosuppression by disrupting CCL22-mediated communication between KCs and Tregs. MicroRNA-15a/16-1 represents a potential immunotherapy against HCC.
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Affiliation(s)
- Ningning Liu
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Ching Wen Chang
- Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
| | - Clifford J Steer
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota; Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, Minnesota
| | - Xin Wei Wang
- Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
| | - Guisheng Song
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota; Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, Minnesota.
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Lin HP, Chang TH, Lee HF, Tsai YH, Chang CW, Chiang HC, Liu HE. Comparison of the early development of the professional values for nursing students in the traditional program and the second-degree program: a longitudinal study. Nurs Open 2021; 9:1105-1113. [PMID: 34914200 PMCID: PMC8859053 DOI: 10.1002/nop2.1150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 10/21/2021] [Accepted: 11/16/2021] [Indexed: 11/09/2022] Open
Abstract
Aim This study aims to compare the early development of professional value between the students in the traditional programme (BSN) and those in the accelerated BSN (ABSN) programmes. Design A longitudinal design was conducted. Methods Data were collected from three schools of nursing during one academic year. A total of 117 BSN students and 101 ABSN students completed the survey of demographic information and the Nurses’ Professional Values Scale–Revised questionnaires. All data were analysed by IBM SPSS‐Statistics 22. Results Results showed that, in the beginning of the first professional nursing course, both students in the BSN and the ABSN programmes reported similar level of professional values. However, after one academic year, the changes in the professional value varied both between these two programmes and among the three different nursing schools. The increased professional value in school A represented the possibility for students to improve during their first‐year professional nursing programme. As educators, we should redesign our teaching strategies according to the different conditions of students in each programme.
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Affiliation(s)
- Hui-Ping Lin
- Department of Nursing, Taoyuan Branch of the Ministry of Health and Welfare, Taoyuan, Taiwan.,Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tsai-Hsiu Chang
- Department of nursing, Hungkuang University, Taichung, Taiwan
| | - Hsiu-Fang Lee
- Department of Nursing, Chang Gung Memorial Hospital, Tao-Yuan, Taiwan.,Department of Nursing, College of Nursing, Chang Gung University of Science and Technology, Taoyuan, Taiwan
| | - Yu-Hsia Tsai
- School of Nursing, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.,Department of Cardiovascular Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - C W Chang
- School of Nursing, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.,Assistant Research Fellow at Division of Pediatric Endocrinology & Genetics, Department of Pediatrics, Chang-Gung Memorial Hospital, TaoYuan, Taiwan
| | - Hui-Chu Chiang
- School of Nursing, National Taipei University of Nursing and Health Sciences Science, Taipei, Taiwan
| | - Hsueh-Erh Liu
- Department of Nursing, College of Nursing, Chang Gung University of Science and Technology, Taoyuan, Taiwan.,School of Nursing, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan.,Department of Rheumatology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
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12
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Rias YA, Kurniawan AL, Chang CW, Gordon CJ, Tsai HT. Synergistic Effects of Regular Walking and Alkaline Electrolyzed Water on Decreasing Inflammation and Oxidative Stress, and Increasing Quality of Life in Individuals with Type 2 Diabetes: A Community Based Randomized Controlled Trial. Antioxidants (Basel) 2020; 9:E946. [PMID: 33019646 PMCID: PMC7599474 DOI: 10.3390/antiox9100946] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/17/2020] [Accepted: 09/25/2020] [Indexed: 02/07/2023] Open
Abstract
Alkaline electrolyzed water (AEW) and walking are strongly recommended for ameliorating oxidative stress and inflammation. Nevertheless, there is a lack of information on the combination of both on alleviating inflammation, oxidative stress, and improving the quality of life (QoL). We investigated the synergistic effects of drinking AEW and walking on advanced glycation end products (AGEs), advanced oxidation protein products (AOPPs), malondialdehyde (MDA), white blood cells (WBCs), neutrophil-lymphocyte ratio (NLR) and QoL. In total, 81 eligible patients with type 2 diabetes (T2DM) were randomly allocated via single blind to four groups: consumed 2 L/day of AEW (n = 20), instructed to walk for 150 min/week (n = 20), received a combination of AEW and walking (n = 20), and continue their habitual diet and activity (n = 21). Data were collected and analyzed before and after 8 weeks of intervention. Our results showed a significant interaction between the group and time, with both AEW and walking independently and synergistically ameliorating AGEs, AOPPs, MDA, NLR and WBCs levels. Moreover, the AEW group had a higher physical and total QoL score. The walking group and the combined group had higher scores in physical, mental and total QoL compared to the control group. The synergistic effect of AEW and regular walking are an advisable treatment for patients with T2DM.
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Affiliation(s)
- Yohanes Andy Rias
- School of Nursing, College of Nursing, Taipei Medical University, Taipei 11031, Taiwan;
- Faculty of Health and Medicine, College of Nursing, Institut Ilmu Kesehatan Bhakti Wiyata, Kediri 64114, Indonesia
| | - Adi Lukas Kurniawan
- Research Center for Healthcare Industry Innovation, National Taipei University of Nursing and Health Sciences, 365 Ming-te Road, Beitou District, Taipei 112, Taiwan;
| | - Ching Wen Chang
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei 11031, Taiwan;
| | - Christopher James Gordon
- Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Camperdown 2050, Australia;
| | - Hsiu Ting Tsai
- School of Nursing, College of Nursing, Taipei Medical University, Taipei 11031, Taiwan;
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei 11031, Taiwan
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13
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Rias YA, Kurniasari MD, Traynor V, Niu SF, Wiratama BS, Chang CW, Tsai HT. Synergistic Effect of Low Neutrophil-Lymphocyte Ratio With Physical Activity on Quality of Life in Type 2 Diabetes Mellitus: A Community-Based Study. Biol Res Nurs 2020; 22:378-387. [PMID: 32390456 DOI: 10.1177/1099800420924126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Physical inactivity and Type 2 diabetes mellitus (T2DM)-associated inflammatory biomarkers are correlated with poor quality of life (QoL). However, no study has investigated the synergistic effect of physical activity (PA) and lower neutrophil-lymphocyte ratio (NLR) on QoL. OBJECTIVE We examined the independent and synergistic effects of PA and inflammatory biomarkers on three domains of QoL in T2DM. METHODS This cross-sectional study included 294 patients with T2DM from community clinics in Indonesia. The 36-item Short Form Survey and a questionnaire about PA engagement were used to measure QoL and metabolic equivalent of task (MET)-hr/week, respectively. Inflammatory biomarkers were measured in fasting blood. Adjusted coefficients β and 95% confidence interval (CI) were estimated using multiple linear regression. The synergistic effect was analyzed using additive interaction for linear regression. RESULTS Patients with PA ≥ 7.5 MET-hr/week exhibited significantly higher total QoL (β = 8.41, 95% CI = [6.04, 10.78]) and physical component score (PCS; β = 13.90, 95% CI = [10.52, 17.29]) than those with PA < 7.5 MET-hr/week. Patients with NLR < 1.940 had significantly higher total QoL (β = 4.76, 95% CI = [3.41, 6.11]), mental component score (MCS; β = 2.62, 95% CI = [0.75, 4.49]), and PCS (β = 6.89, 95% CI = [4.97, 8.82]) than patients with NLR ≥ 1.940. PA ≥ 7.5 MET-hr/week and NLR < 1.940 exhibited a synergistic effect on total QoL, MCS, and PCS. CONCLUSIONS High PA level and low NLR had a positive synergistic effect on QoL among patients with T2DM.
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Affiliation(s)
- Yohanes Andy Rias
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C.,Faculty of Health and Medicine, College of Nursing, Institut Ilmu Kesehatan Bhakti Wiyata, Kediri, Jawa Timur, Indonesia
| | - Maria Dyah Kurniasari
- School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
| | - Victoria Traynor
- School of Nursing, Faculty of Science, Medicine and Health, University of Wollongong, New South Wales, Australia
| | - Shu Fen Niu
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
| | - Bayu Satria Wiratama
- Department of Biostatistics, Epidemiology, and Population Health, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Bulaksumur Yogyakarta, Indonesia
| | - Ching Wen Chang
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, Taipei, Taiwan, R.O.C
| | - Hsiu Ting Tsai
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan, R.O.C
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14
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Wu VC, Chen SW, Wu M, Liu CH, Chang CW, Chen CC, Wu KP, Chang SH, Lin MS, Lee TH, Hsieh IC, Chu PH, Lin YS. P5138Resuming anticoagulation in patients with atrial fibrillation experiencing hemorrhage stroke or nontraumatic intracranial hemorrhage. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- V C Wu
- Chang Gung Memorial Hospital, Division of Cardiology, Taoyuan City, Taiwan ROC
| | - S W Chen
- Chang Gung Memorial Hospital, Department of Cardiothoracic and Vascular Surgery, Taoyuan City, Taiwan ROC
| | - M Wu
- Brown University, Division of Cardiovascular Medicine, Providence, United States of America
| | - C H Liu
- Chang Gung Memorial Hospital, Department of Neurology, Taoyuan City, Taiwan ROC
| | - C W Chang
- Chang Gung Memorial Hospital, Department of Neurology, Taoyuan City, Taiwan ROC
| | - C C Chen
- Chang Gung Memorial Hospital, Department of Neurosurgery, Taoyuan City, Taiwan ROC
| | - K P Wu
- Chang Gung Memorial Hospital, Department of Physical Medicine and Rehabilitation, Taoyuan City, Taiwan ROC
| | - S H Chang
- Chang Gung Memorial Hospital, Division of Cardiology, Taoyuan City, Taiwan ROC
| | - M S Lin
- Chang Gung Memorial Hospital, Department of Cardiology, Chiayi, Taiwan ROC
| | - T H Lee
- Chang Gung Memorial Hospital, Department of Neurology, Taoyuan City, Taiwan ROC
| | - I C Hsieh
- Chang Gung Memorial Hospital, Division of Cardiology, Taoyuan City, Taiwan ROC
| | - P H Chu
- Chang Gung Memorial Hospital, Division of Cardiology, Taoyuan City, Taiwan ROC
| | - Y S Lin
- Chang Gung Memorial Hospital, Department of Cardiology, Chiayi, Taiwan ROC
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15
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Fan CC, Chiu YC, Liu C, Lai WW, Cheng CH, Lin DL, Li GR, Lo YH, Chang CW, Tsai CC, Chang CY. The Impact of the Shallow-Trench Isolation Effect on Flicker Noise of Source Follower MOSFETs in a CMOS Image Sensor. J Nanosci Nanotechnol 2018; 18:4217-4221. [PMID: 29442765 DOI: 10.1166/jnn.2018.15239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The flicker noise of source follower transistors is the dominant noise source in image sensors. This paper reports a systematic study of the shallow trench isolation effect in transistors with different sizes under high temperature conditions that correspond to the quantity of empty defect sites. The effects of shallow trench isolation sidewall defects on flicker noise characteristics are investigated. In addition, the low-frequency noise and subthreshold swing degrade simultaneously in accordance to the device gate width scaling. Both serious subthreshold leakage and considerable noise can be attributed to the high trap density near the STI edge. Consequently, we propose a coincidental relationship between the noise level and the subthreshold characteristic; its trend is identical to the experiments and simulation results.
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Affiliation(s)
- C C Fan
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - Y C Chiu
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - C Liu
- Department of Electro-Physics, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - W W Lai
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - C H Cheng
- Department of Mechatronic Engineering, National Taiwan Normal University, Taipei, 106, Taiwan
| | - D L Lin
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - G R Li
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - Y H Lo
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - C W Chang
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - C C Tsai
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - C Y Chang
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
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16
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Hsu HC, Tan CD, Chang CW, Chu CW, Chiu YC, Pan CJ, Huang HM. Evaluation of nasal patency by visual analogue scale/nasal obstruction symptom evaluation questionnaires and anterior active rhinomanometry after septoplasty: a retrospective one-year follow-up cohort study. Clin Otolaryngol 2016; 42:53-59. [PMID: 27102375 DOI: 10.1111/coa.12662] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To assess the efficacy of septoplasty and the correlation between the subjective evaluations of a visual analogue scale (VAS) and the Nasal Obstruction Symptom Evaluation (NOSE) questionnaire and active anterior rhinomanometry of the nasal airway after septoplasty. DESIGN A retrospective, individual cohort study. SETTING Ear, Nose and Throat Department, Taipei City Hospital, Taipei, Taiwan. PARTICIPANTS Fifty patients with chronic nasal obstruction were enrolled in the study. All 50 patients underwent septoplasty because of nasal septal deviation. Another 28 patients without nasal symptoms served as controls. MAIN OUTCOME MEASURES VAS, NOSE and active anterior rhinomanometry were used to measure the sensation of nasal obstruction. All measurements were performed in both groups preoperatively and then repeated on three postoperative visits (3, 6 and 12 months). RESULTS The mean VAS score, NOSE score and the nasal resistance in the narrow side of the nose in the study group showed reduced symptoms at 3, 6 and 12 months postoperatively compared with the respective preoperative measurements (P < 0.001, all). The VAS and NOSE scores did not significantly correlate with total nasal resistance preoperatively or postoperatively. The VAS and nasal resistance in the obstructed nasal cavity correlated significantly preoperatively (P < 0.05), but not postoperatively. CONCLUSIONS The subjective and objective symptoms of nasal obstruction had improved 1 year after septoplasty. A significant correlation between VAS scores and nasal resistance in the narrow side of the nose was found before surgery. The subjective and objective measurements of nasal obstruction lacked significant correlation postoperatively.
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Affiliation(s)
- H C Hsu
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan
| | - C D Tan
- Department of Otolaryngology, School of Medicine, College of Medicine, Taiwan National University, Taipei, Taiwan
| | - C W Chang
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan
| | - C W Chu
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan
| | - Y C Chiu
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan
| | - C J Pan
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan
| | - H M Huang
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan.,Department of Otolaryngology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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17
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Kuo MH, Lai WT, Hsu TM, Chen YC, Chang CW, Chang WH, Li PW. Designer germanium quantum dot phototransistor for near infrared optical detection and amplification. Nanotechnology 2015; 26:055203. [PMID: 25590411 DOI: 10.1088/0957-4484/26/5/055203] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrated a unique CMOS approach for the production of a high-performance germanium (Ge) quantum dot (QD) metal-oxide-semiconductor phototransistor. In the darkness, low off-state leakage (Ioff ∼ 0.27 pA μm(-2)), a high on-off current ratio (Ion/Ioff ∼ 10(6)), and good switching behaviors (subthreshold swing of 175 mV/dec) were measured on our Ge-QD phototransistor at 300 K, indicating good hetero-interfacial quality of the Ge-on-Si. Illumination makes a significant enhancement in the drain current of Ge QD phototransistors when biased at both the on- and off-states, which is a great benefit from Ge QD-mediated photoconductive and photovoltaic effects. The measured photocurrent-to-dark-current ratio (Iphoto/Idark) and the photoresponsivities from the Ge QD phototransistor are as high as 4.1 × 10(6) and 1.7 A W(-1), respectively, under an incident power of 0.9 mW at 850 nm illumination. A superior external quantum efficiency of 240% and a very fast temporal response time of 1.4 ns suggest that our Ge QD MOS phototransistor offers great promise as optical switches and transducers for Si-based optical interconnects.
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Affiliation(s)
- M H Kuo
- Department of Electrical Engineering and Center for Nano Science and Technology, National Central University, ChungLi, Taiwan, 32001, People's Republic of China
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18
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Lee MF, Chang CW, Wang NM, Lin SJ, Chen YH. Serine protease inhibitor gabexate mesilate attenuates american cockroach-induced bronchial damage and inflammatory cytokine release. J Investig Allergol Clin Immunol 2014; 24:338-345. [PMID: 25345304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Allergic airway diseases are not only a T,2-mediated chronic airway inflammation, but also a condition of epithelial barrier defects and dysfunction. Allergens with protease activities are known factors that initiate respiratory epithelial damage. Cockroach allergy is the second leading cause of allergic respiratory airway diseases in Taiwan, and cockroach allergens have strong serine protease activity. This study aimed to determine the protective effect of the direct local administration of gabexate mesilate (GM) on American cockroach allergen (CraA)-induced human bronchial epithelial cell inflammation. METHODS BEAS-2B cells, from the human bronchial epithelial cell line, were stimulated with CraA or co-cultured with different doses of GM. Cellular morphologic changes were observed by microscopy and changes in chemokine mRNA expression and protein levels were determined by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) and ELISA. Effects of specific inhibitors of ERK1/2 (U0126), INK (SP600125), and p38 MAPK (SB203580) on CraA-induced chemokine mRNA expression were also tested by RT-PCR. RESULTS GM prevented CraA-induced bronchial epithelial cell detachment and morphological changes. It had superior and more extensive suppression effects than specific target MAPK inhibitors in CraA-induced mRNA expression of IL-8, monocyte chemotactic protein (MCP) 1, chemokine (C-C motif) ligand 20, and granulocyte-macrophage colony-stimulating factor from the cells in a dose-dependent manner. CraA-induced IL-8 and MCP-1 protein production from BEAS-2B cells was also attenuated by GM. CONCLUSIONS The serine protease inhibitor GM has local protective effects against CraA-induced bronchial epithelial inflammation. The development of an inhaled or intranasal protease inhibitor may be a potential strategy for the treatment of allergic airway diseases induced by allergens with protease activities.
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Chang CW, Chang CW, Wang HY, Chen MJ, Lin SC, Chang WH, Lee JJ. Intermittent small-bowel obstruction due to a mobile bezoar diagnosed with single-balloon enteroscopy. Endoscopy 2012; 43 Suppl 2 UCTN:E297. [PMID: 21915835 DOI: 10.1055/s-0030-1256470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- C W Chang
- Division of Gastroenterology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan
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Hunter GW, Xu JC, Biaggi-Labiosa AM, Laskowski D, Dutta PK, Mondal SP, Ward BJ, Makel DB, Liu CC, Chang CW, Dweik RA. Smart sensor systems for human health breath monitoring applications. J Breath Res 2011; 5:037111. [PMID: 21896970 DOI: 10.1088/1752-7155/5/3/037111] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Breath analysis techniques offer a potential revolution in health care diagnostics, especially if these techniques can be brought into standard use in the clinic and at home. The advent of microsensors combined with smart sensor system technology enables a new generation of sensor systems with significantly enhanced capabilities and minimal size, weight and power consumption. This paper discusses the microsensor/smart sensor system approach and provides a summary of efforts to migrate this technology into human health breath monitoring applications. First, the basic capability of this approach to measure exhaled breath associated with exercise physiology is demonstrated. Building from this foundation, the development of a system for a portable asthma home health care system is described. A solid-state nitric oxide (NO) sensor for asthma monitoring has been identified, and efforts are underway to miniaturize this NO sensor technology and integrate it into a smart sensor system. It is concluded that base platform microsensor technology combined with smart sensor systems can address the needs of a range of breath monitoring applications and enable new capabilities for healthcare.
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Affiliation(s)
- G W Hunter
- NASA Glenn Research Center, Cleveland, OH, USA.
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Affiliation(s)
- Y K Lee
- Division of Gastroenterology, Department of Internal Medicine, Mackay Memorial Hospital and Mackay Medicine, Nursing and Management College, Taipei, Taiwan
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22
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Hsieh CC, Lin TH, Chang HW, Chang CW, Chang WC, Yang CC. Effect of dopants on the soft magnetic properties and high frequency characteristics of FeCoBM (M = Ti, Nb, Hf, and Ta) thin films. J Nanosci Nanotechnol 2011; 11:2752-2755. [PMID: 21449469 DOI: 10.1166/jnn.2011.2726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Effect of dopants on the soft magnetic properties and high frequency characteristics of FeCoBM thin films (M = Ti, Nb, Hf, and Ta) have been studied. For (Fe0.55Co0.45)(100-x)B(x) (x = 5-15) thin films, with the increase of B content, the resistivity was increased because B could decrease the crystallinity of the films. The (Fe0.55Co0.45)90B10 thin film showed the optimum properties, where 4piM(s) = 16.1 kG, H(ce) = 64.2 Oe, H(ch) = 13.5 Oe, H(k) = 310 Oe and p = 338 microomega-cm. To reduce the coercivity of the film, the elements M, including Ti, Nb, Hf, and Ta, were selected to substitute for B in the FeCoB films. It was found that (Fe0.55Co0.45)90B6Ti2Nb2 thin film after annealing at a temperature of 200 degrees C for 30 min showed the optimal properties, where 4piM(s) = 15.8 kG, H(ce) = 4.8 Oe, H(ch) = 3.6 Oe, H(k) = 224 Oe and p = 290 microomega-cm. The theoretically calculated ferromagnetic resonance frequency of the developed films can be higher than 5 GHz.
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Affiliation(s)
- C C Hsieh
- Department of Physics, National Chung Cheng University, Taiwan 621, ROC
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23
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Hsieh S, Huang BY, Hsieh SL, Wu CC, Wu CH, Lin PY, Huang YS, Chang CW. Green fabrication of agar-conjugated Fe3O4 magnetic nanoparticles. Nanotechnology 2010; 21:445601. [PMID: 20935349 DOI: 10.1088/0957-4484/21/44/445601] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Magnetic nanoparticles are of great interest both for fundamental research and emerging applications. In the biomedical field, magnetite (Fe(3)O(4)) has shown promise as a hyperthermia-based tumor therapeutic. However, preparing suitable solubilized magnetite nanoparticles is challenging, primarily due to aggregation and poor biocompatibility. Thus methods for coating Fe(3)O(4) NPs with biocompatible stabilizers are required. We report a new method for preparing Fe(3)O(4) nanoparticles by co-precipitation within the pores of agar gel samples. Permeated agar gels were then dried and ground into a powder, yielding agar-conjugated Fe(3)O(4) nanoparticles. Samples were characterized using XRD, FTIR, TGA, TEM and SQUID. This method for preparing agar-coated Fe(3)O(4) nanoparticles is environmentally friendly, inexpensive and scalable.
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Affiliation(s)
- S Hsieh
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan.
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Dooley LM, Chang CW. Bilateral transversely clefted middle turbinates. Ear Nose Throat J 2009; 88:856-858. [PMID: 19358123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Affiliation(s)
- Laura M Dooley
- Department of Otolaryngology, University of Missouri, Columbia, USA
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Chang CW, Lin YY, Peng CJ, Lin M, Liu RS, Wang SJ, Lin WJ, Wang HE. The robotic radiosynthesis of 5-[(18)F]fluoro-2'-deoxyuridine and its biological characterization. Appl Radiat Isot 2009; 67:1355-61. [PMID: 19307130 DOI: 10.1016/j.apradiso.2009.02.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
5-[(18)F]fluoro-2'-deoxyuridine ([(18)F]FUdR) was synthesized using a robotic system as a proliferation probe for PET. [(18)F]FUdR was prepared via radiofluorodestannylation reaction from its organotin precursor. Biodistribution study and microPET imaging of [(18)F]FUdR in NG4TL4 sarcoma-bearing FVB/n mice were performed. The tumor-to-blood and tumor-to-muscle ratio increased steadily from 15 (1.81 and 3.42) to 120min (9.10 and 11.9) post injection. The dynamic microPET imaging demonstrates remarkable radioactivity retention in the tumor, which is consistent with the results of biodistribution study.
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Affiliation(s)
- C W Chang
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, No. 155, 2nd Sec., Li-Nong St., Taipei, 112 Taiwan
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Chang CW, Okawa D, Garcia H, Majumdar A, Zettl A. Breakdown of Fourier's law in nanotube thermal conductors. Phys Rev Lett 2008; 101:075903. [PMID: 18764555 DOI: 10.1103/physrevlett.101.075903] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2008] [Revised: 07/09/2008] [Indexed: 05/26/2023]
Abstract
We present experimental evidence that the room temperature thermal conductivity (kappa) of individual multiwalled carbon and boron-nitride nanotubes does not obey Fourier's empirical law of thermal conduction. Because of isotopic disorder, kappa's of carbon nanotubes and boron-nitride nanotubes show different length dependence behavior. Moreover, for these systems we find that Fourier's law is violated even when the phonon mean free path is much shorter than the sample length.
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Affiliation(s)
- C W Chang
- Department of Physics, University of California at Berkeley, California 94720, USA.
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Demond A, Adriaens P, Towey T, Chang SC, Hong B, Chen Q, Chang CW, Franzblau A, Garabrant D, Gillespie B, Hedgeman E, Knutson K, Lee CY, Lepkowski J, Olson K, Ward B, Zwica L, Luksemburg W, Maier M. Statistical comparison of residential soil concentrations of PCDDs, PCDFs, and PCBs from two communities in Michigan. Environ Sci Technol 2008; 42:5441-5448. [PMID: 18754458 DOI: 10.1021/es702554g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The University of Michigan dioxin exposure study was undertaken to address concerns that the industrial discharge of dioxin-like compounds in the Midland, MI area had resulted in contamination of soils in the Tittabawassee River floodplain and downwind of the incinerator. The study was designed in a rigorously statistical manner comprising soil measurements of 29 polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs) from 766 residential properties, selected probabilistically, in the Midland area and in Jackson and Calhoun Counties (Michigan) as a background comparison. A statistical comparison determined that the geometric mean toxic equivalent (TEQ) levels in samples from the target populations were statistically significantly above background. In addition, the probabilities of being above the 75th and 95th percentiles of background were also greater. Congener contributions to the TEQ were dominated by 2,3,4,7,8-PeCDF and 2,3,7,8-TCDF in the floodplain and by 2,3,7,8-TCDD in the incinerator plume. However, PCB 126 was the top congener contributing to the background TEQ. On the basis of statistical inference to the total population, it was estimated that about 36% of the properties in the floodplain and incinerator plume have at least one soil sample over the Michigan Department of Environmental Quality's soil direct contact criterion of 90 pg/g TEQ.
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Affiliation(s)
- A Demond
- Department of Civil and Environmental Engineering, University of Michigan College of Engineering, Ann Arbor, Michigan 48109, USA.
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Chiu YN, Huang YL, Chang CW. Medial antebrachial cutaneous neuropathy: a case report. Electromyogr Clin Neurophysiol 2008; 48:125-127. [PMID: 18435217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Medial antebrachial cutaneous (MABC) neuropathy in the forearm is rare. We report here a case of this neuropathy after surgery for panniculitis excision. Examination revealed hypesthesia over left medial forearm at MABC nerve territory. Tineal's sign at the operation site of left medial arm was positive. Sensory nerve conduction studies showed reduced sensory nerve action potential amplitude which is compatible with an axonal neuropathy and interside amplitude ratio of 2.35. In the present case report, the sensory nerve conduction study is a useful tool in confirming MABC neuropathy.
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Affiliation(s)
- Y N Chiu
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan
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Abstract
We find that the high thermal conductivity of carbon nanotubes remains intact under severe structural deformations while the corresponding electrical resistance and thermoelectric power show compromised responses. Similar robust thermal transport against bending is found for boron nitride nanotubes. Surprisingly, for both systems the phonon mean free path exceeds the characteristic length of structural ripples induced by bending and approaches the theoretical limit set by the radius of curvature. The robustness of heat conduction in nanotubes refines the ultimate limit that is far beyond the reach of ordinary materials.
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Affiliation(s)
- C W Chang
- Department of Physics, University of California at Berkeley, California 94720, USA.
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Chang CW, Chou TK, Liu RS, Wang SJ, Lin WJ, Chen CH, Wang HE. A robotic synthesis of [18F]fluoromisonidazole ([18F]FMISO). Appl Radiat Isot 2007; 65:682-6. [PMID: 17379530 DOI: 10.1016/j.apradiso.2007.01.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2006] [Revised: 01/04/2007] [Accepted: 01/09/2007] [Indexed: 10/23/2022]
Abstract
This study aimed to develop an automated synthesis of [18F]fluoromisonidazole ([18F]FMISO) using a Scanditronix Anatech RB III robotic system. [18F]HF was produced via the 18O(p,n)18F reaction using a Scanditronix MC17F cyclotron. On average, a typical run produced [18F]FMISO with an uncorrected radiochemical yield of 30+/-5% at end of synthesis (EOS) from the irradiation of 95% enriched [18O]water. The total synthesis time was 65 min. The retention time of [18F]FMISO (the radio-peak) was 4.9 min, which was consistent with the authentic FMISO (the ultraviolet peak). The radiochemical purity was greater than 97%. Preparation of [18F]FMISO using the automated robotic system is highly reliable and reproducible, and the radiation burden for the operator can be largely reduced. Sufficient radioactivities of [18F]FMISO could be obtained for non-invasive tumor hypoxia imaging in vivo with positron emission tomography (PET).
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Affiliation(s)
- C W Chang
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, No. 155, Sec. 2, Li-Nong Street, Taipei 112, Taiwan
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Yang JL, Chang CW, Lin JJ. Shoulder kinematic features in the prediction of response to physical therapy in patients with frozen shoulder syndrome. J Biomech 2007. [DOI: 10.1016/s0021-9290(07)70381-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
We demonstrated nanoscale solid-state thermal rectification. High-thermal-conductivity carbon and boron nitride nanotubes were mass-loaded externally and inhomogeneously with heavy molecules. The resulting nanoscale system yields asymmetric axial thermal conductance with greater heat flow in the direction of decreasing mass density. The effect cannot be explained by ordinary perturbative wave theories, and instead we suggest that solitons may be responsible for the phenomenon. Considering the important role of electrical rectifiers (diodes) in electronics, thermal rectifiers have substantial implications for diverse thermal management problems, ranging from nanoscale calorimeters to microelectronic processors to macroscopic refrigerators and energy-saving buildings.
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Affiliation(s)
- C W Chang
- Department of Physics, University of California at Berkeley, Berkeley, CA 94720, USA
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Wang IT, Chang CW, Tang WL, Chen WY, Liu WM. Keratinizing squamous cell carcinoma of the cervix in a sexually inexperienced woman: a case report. J Reprod Med 2006; 51:745-6. [PMID: 17039710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
BACKGROUND Even though cervical cancer is largely considered to be a sexually transmitted disease with a viral etiology, other modes of transmission are theoretically possible. CASE A 38-year-old woman with cervical squamous cell carcinoma adamantly denied having ever had sexual intercourse due to personal, religious and cultural beliefs. CONCLUSION Because the human papillomavirus may be spread via nonsexual means, Pap smear screening in sexually active and inexperienced women is important.
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Affiliation(s)
- I Te Wang
- Department of Obstetrics and Gynecology, Taipei Medical University Hospital, 252, Wu-Hsin Street, Taipei, Taiwan
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Abstract
We report carbon-nanotube-based electromechanical resonators with the fundamental mode frequency over 1.3 GHz, operated in air at room temperature. A new combination of drive and detection methods allows for unprecedented measurement of both oscillation amplitude and phase and elucidates the relative mobility of static charges near the nanotube. The resonator serves as an exceptionally sensitive mass detector capable of approximately 10(-18) g resolution.
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Affiliation(s)
- H B Peng
- Department of Physics and Center of Integrated Nanomechanical Systems, University of California at Berkeley, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Chang CW, Fennimore AM, Afanasiev A, Okawa D, Ikuno T, Garcia H, Li D, Majumdar A, Zettl A. Isotope effect on the thermal conductivity of boron nitride nanotubes. Phys Rev Lett 2006; 97:085901. [PMID: 17026316 DOI: 10.1103/physrevlett.97.085901] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Indexed: 05/12/2023]
Abstract
We have measured the temperature-dependent thermal conductivity kappa(T) of individual multiwall boron nitride nanotubes using a microfabricated test fixture that allows direct transmission electron microscopy characterization of the tube being measured. kappa(T) is exceptionally sensitive to isotopic substitution, with a 50% enhancement in kappa(T) resulting for boron nitride nanotubes with 99.5% 11B. For isotopically pure boron nitride nanotubes, kappa rivals that of carbon nanotubes of similar diameter.
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Affiliation(s)
- C W Chang
- Department of Physics, University of California, Berkeley, California 94720, USA
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Chang CW, Lin M, Wu SY, Hsieh CH, Liu RS, Wang SJ, Huang KL, Chen CH, Wang HE. A high yield robotic synthesis of 9-(4-[18F]-fluoro-3-hydroxymethylbutyl)guanine ([18F]FHBG) and 9-[3-[18F]fluoro-1-hydroxy-2-propoxy)methyl]guanine([18F] FHPG) for gene expression imaging. Appl Radiat Isot 2006; 65:57-63. [PMID: 16916606 DOI: 10.1016/j.apradiso.2006.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2006] [Revised: 05/24/2006] [Accepted: 06/23/2006] [Indexed: 11/22/2022]
Abstract
The aim of this study was to develop an automated synthesis of 9-(4-[(18)F]-fluoro-3-hydroxymethylbutyl)guanine ([(18)F]FHBG) and 9-[(3-[(18)F]fluoro-1-hydroxy-2-propoxy)methyl]guanine ([(18)F]FHPG) using a Scanditronix Anatech RB III robotic system. [(18)F]HF was produced via (18)O(p, n)(18)F using a Scanditronix MC17F cyclotron. On average, a typical run produced [(18)F]FHBG and [(18)F]FHPG with an uncorrected radiochemical yield of 19% and 16%, respectively, at end of synthesis (EOS) from irradiation of 95% enriched [(18)O]water. The total synthesis time was 80 min. The retention time of [(18)F]FHBG and [(18)F]FHPG (the radio-peak) was 3.9 and 4.0 min, respectively, which was consistent with the [(19)F]FHBG and [(19)F]FHPG ultraviolet peak. The radiochemical purity was greater than 97%. A robotic, automated method for [(18)F]FHBG and [(18)F]FHPG radiosynthesis is therefore feasible. The radiation burden for the operator can be reduced as much as possible. Sufficient radioactivities of [(18)F]FHBG and [(18)F]FHPG could be obtained for non-invasive monitoring the expression of transfected gene in vivo with positron emission tomography (PET).
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Affiliation(s)
- C W Chang
- Institute of Radiological Sciences, National Yang-Ming University, No. 155, 2nd Sec., Li-Nong St., Taipei, Taiwan
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Münderle M, Taraschewski H, Klar B, Chang CW, Shiao JC, Shen KN, He JT, Lin SH, Tzeng WN. Occurrence of Anguillicola crassus (Nematoda: Dracunculoidea) in Japanese eels Anguilla japonica from a river and an aquaculture unit in SW Taiwan. Dis Aquat Organ 2006; 71:101-8. [PMID: 16956057 DOI: 10.3354/dao071101] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The infection by swimbladder nematodes of the genus Anguillicola (Dracunculoidea: Anguillicolidae) was examined in 2 populations of the Japanese eel Anguilla japonica in SW Taiwan. Wild eels from the Kao-Ping river were compared with cultured eels from an adjacent aquaculture unit. Only the cosmopolitan species Anguillicola crassus was present. Among wild eels, prevalence of infection varied between 21 and 62%, and mean intensity between 1.7 and 2.7 for adult worms. Similar intensity values (1.3 to 2.8) were recorded for the larvae. In cultured eels, prevalence as well as mean intensities were higher. In the cultured hosts, mean larval intensities exceeded those of adult worms 2-fold, and maximum larval intensities were 4- to 5-fold higher than in eels from the river. In cultured eels, dead larvae were also more abundant than in wild eels. We conclude that infrapopulations of A. crassus in Japanese eels are regulated by the defense system of this host, intraspecific density-dependent regulation being less likely as the major regulatory mechanism. No influence of the parasite on eel condition was found in either wild or cultured eels, indicating a low or moderate pathogenic effect of A. crassus on this host. This study shows that A. crassus is moderately common in cultured and wild Japanese eels in Taiwan, where the parasite is endemic.
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Affiliation(s)
- M Münderle
- Zoologisches Institut, Okologie/Parasitologie, Universität Karlsruhe, Germany.
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Okuda M, Suzuki R, Moriya M, Fujimoto M, Chang CW, Fujimoto T. The effect of hematoma removal for reducing the development of brain edema in cases of putaminal hemorrhage. Acta Neurochir Suppl 2006; 96:74-7. [PMID: 16671429 DOI: 10.1007/3-211-30714-1_18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
INTRODUCTION Surgical intervention in putaminal hemorrhage has been a controversial issue. The aim of this research is to evaluate the benefits of surgery for reducing the development of brain edema. MATERIALS AND METHODS Sixteen cases of putaminal hemorrhage were examined. Eight patients were treated conservatively (C group), and the other 8 patients were treated surgically (S group). Head CT scans were performed on the day of onset (day 0) in C group or performed just after surgery (day 0) in S group, and performed again once per period on days 1-7, 8-14, and 15-21. The volume of the mass including hematoma and edema (H + E) was measured using CT scans and the (H + E)/H0 ratios were calculated (H0; hematoma volume on day 0). The (H + E)/H0 ratios for each period were compared statistically between the 2 groups using a t-test. RESULTS The mean values of(H + E)/H0 ratios at each period were 2.19, 2.63, 2.53 in C group, and 1.29, 1.29, 0.66 in S group. The values in S group were significantly lower as compared with C group in every period (p < 0.01, < 0.05, < 0.01). CONCLUSIONS Hematoma volume reduction by surgery reduced the development of brain edema.
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Affiliation(s)
- M Okuda
- Department of Neurosurgery, Showa University Fujigaoka Hospital, Yokohama, Japan.
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Chou YT, Chen JC, Liu RS, Chou KL, Chang CW, Lin MT. Dopamine overload visualized in the basal ganglia of rabbit brain during heatstroke can be suppressed by hypothermia. Neurosci Lett 2004; 375:87-90. [PMID: 15670647 DOI: 10.1016/j.neulet.2004.10.075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2004] [Revised: 10/25/2004] [Accepted: 10/25/2004] [Indexed: 11/28/2022]
Abstract
The present study assesses the changes of dopamine levels in the basal ganglia (BG) of rabbit brain during heatstroke with or without hypothermia therapy. The dopamine levels were determined by using 6(F18) fluoro-L-dopa (FDOPA) positron emission tomography (PET) scan. Heatstroke was induced by exposing the anesthetized rabbits to a high blanket temperature (T(blanket)) of 45 degrees C. Hypothermia therapy was accomplished by decreasing T(blanket) from 45 to 16 degrees C. Regions-of-interest were carefully selected on the BG and cerebellum (C). The uptake ratio of FDOPA was defined as the mean counts per pixel from BG divided by the mean counts from C. BG/C ratios represent the dopamine levels of BG. The results showed that the values of mean arterial pressure (MAP) in heatstroke rabbits without hypothermia therapy were significantly lower than those in normothermic controls. However, BG/C FDOPA ratios were greater. Both the arterial hypotension and the increased BG/C FDOPA ratios observed during heatstroke were all reduced after hypothermia therapy. Our data demonstrate that the dopamine overload visualized in the BG of rabbit brain during heatstroke can be suppressed by hypothermia therapy.
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Affiliation(s)
- Y T Chou
- Department of Surgery, Veterans General Hospital, Taipei, Taiwan 112, Taiwan
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Abstract
This study investigated the effect of supplementation with chicken extract on plasma and colostrum protein compositions in lactating women. Thirty healthy pregnant women were evenly divided into the control (n = 15) or chicken extract (CE) group (n = 15). The CE group was given one bottle (70 mL/bottle) of chicken extract three times a day to provide 18 g protein from the 37th week pregnancy to 3 days postpartum. All women in the CE group consumed chicken extract at least for 2 weeks (18 +/- 5 days). High protein supplement was restricted in the control group. Blood samples were collected during the 37th week pregnancy and 3-day postpartum, and milk was collected during 3-day postpartum. The results showed that plasma total protein was significantly lower by 14% in the CE group compared with that in the control group during 3-day postpartum. Plasma epidermal growth factor (EGF) significantly elevated by 236% during 3-day postpartum compared with those during the 37th week pregnancy in the CE group. The levels of lactoferrin, EGF, and transforming growth factor-beta2 (TGF-beta2) in colostrum significantly increased by 34%, 62%, and 196%, respectively, in the CE group compared with those in the control group. However, the levels of total protein, casein, lactalbumin, and secretory immunoglobulin A in colostrum did not significantly differ between two groups. Therefore, supplementation with chicken extract increased colostrum levels of lactoferrin, EGF, and TGF-beta2, which are important for the growth and immune functions of the infants, in lactating women.
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Affiliation(s)
- Jane C-J Chao
- Graduate Institute of Nutrition and Health Sciences, Taipei Medical University, Taipei, Taiwan 110
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Wang CC, Chang CW, Chu CP, Lee DJ, Chang BV, Liao CS. Hydrogen production from wastewater sludge using a Clostridium strain. J Environ Sci Health A Tox Hazard Subst Environ Eng 2003; 38:1867-1875. [PMID: 12940488 DOI: 10.1081/ese-120022885] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Limited data in literature revealed a relatively low hydrogen yield from wastewater sludge, ca. 0.16 mg/g-dried solids, using anaerobic fermentation. We demonstrated in this work a much higher hydrogen yield, around 1.1 mg-H2/g-dried solids using a clostridium strain isolated from the sludge sample. The formed hydrogen would be consumed after passing the peak value at around 30-36 h of fermentation. We examined the effects of employing five different pre-treatments on substrate sludge, but noted no appreciable enhancement in hydrogen yield as commonly expected for methane production. Since a vast amount of organic matters had been released to water after hydrogen fermentation, we externally dosed methanogenic bacteria to the fermented liquor to produce methane. The fermented liquor could produce more methane than the non-fermented sample, indicating that the dosed methanogenic bacteria readily utilized the organic matters derived from the fermentation test.
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Affiliation(s)
- C C Wang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
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Wang CC, Chang CW, Chu CP, Lee DJ, Chang BV, Liao CS, Tay JH. Using filtrate of waste biosolids to effectively produce bio-hydrogen by anaerobic fermentation. Water Res 2003; 37:2789-2793. [PMID: 12753858 DOI: 10.1016/s0043-1354(03)00004-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Waste biosolids collected from sewage works is a biomass containing a vast amount of polysaccharides and proteins, and thus is considered a potential substrate for producing hydrogen using anaerobic fermentation. This work demonstrated, contrary to the common assumption, that the solids phase in waste activated biosolids presents extra nutrients for anaerobes; it in fact prohibits effective bio-hydrogen production. Using filtrate after removal of solids from biosolids produces more hydrogen than using the whole biosolids, with the former reaching a level an order of magnitude higher than the literature results.
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Affiliation(s)
- C C Wang
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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Abstract
AIMS To establish a sensitive and specific polymerase chain reaction (PCR)-based method for detecting Pythium myriotylum in soils. METHODS AND RESULTS Oospores of P. myriotylum were separated from large soil particles by flotation in sucrose solution. The thick-walled oospores were disrupted by vortex with sea sand and its DNA was extracted by the Cetyl trimethyl Ammonium Bromide (CTAB) method. The recovered DNA was verified by PCR amplification of a 150-bp target sequence of P. myriotylum. Samples of 10 g of soil were assayed; thus, the detection limit by PCR-based method was 10 oospores per gram soil. The method was successfully applied for the detection of P. myriotylum in soils collected in March, prior to planting of ginger crops. CONCLUSIONS A PCR-based method for detecting P. myriotylum from soil was achieved. SIGNIFICANCE AND IMPACT OF THE STUDY The PCR method has allowed us to monitor the presence of P. myriotylum in soil prior planting season as a way of reducing or eliminating disease.
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Affiliation(s)
- P H Wang
- Department of Microbiology, Soochow University, Taipei, Taiwan, 11102, Republic of China.
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Abstract
Excess wastewater sludge collected from the recycling stream of an activated sludge process is biomass that contains large quantities of polysaccharides and proteins. However, relevant literature indicates that the bio-conversion of wastewater sludge to hydrogen is limited and therefore not economically feasible. This work examined the anaerobic digestion of wastewater sludge using a clostridium strain isolated from the sludge as inoculum. A much higher hydrogen yield than presented in the literature was obtained. Also, the effects of five pre-treatments-ultrasonication, acidification, sterilization, freezing/thawing and adding methanogenic inhibitor-on the production of hydrogen were examined. Freezing and thawing and sterilization increased the specific hydrogen yield by 1.5-2.5 times to that of untreated sludge, while adding an inhibitor and ultrasonication reduced the hydrogen yield.
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Affiliation(s)
- C C Wang
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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Lin CH, Chang CW, Wang CC, Chang MS, Yang LL. Byakangelicol, isolated from Angelica dahurica, inhibits both the activity and induction of cyclooxygenase-2 in human pulmonary epithelial cells. J Pharm Pharmacol 2002; 54:1271-8. [PMID: 12356282 DOI: 10.1211/002235702320402125] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We examined the inhibitory mechanism of byakangelicol, isolated from Angelica dahurica, on interleukin-1beta (IL-1beta)-induced cyclooxygenase-2 (COX-2) expression and prostaglandin E2 (PGE2) release in human pulmonary epithelial cell line (A549). Byakangelicol (10-50 microM) concentration-dependently attenuated IL-1beta-induced COX-2 expression and PGE2 release. The selective COX-2 inhibitor, NS-398 (0.01-1 microM), and byakangelicol (10-50 microM) both concentration-dependently inhibited the activity of the COX-2 enzyme. Byakangelicol, at a concentration up to 200 microM, did not affect the activity and expression of COX-1 enzyme. IL-1beta-induced p44/42 mitogen-activated protein kinase (MAPK) activation was inhibited by the MAPK/extracellular signal-regulated protein kinase (MEK) inhibitor, PD 98059 (30 microM), while byakangelicol (50 microM) had no effect. Treatment of cells with byakangelicol (50 microM) or pyrrolidine dithiocarbamate (PDTC; 50 microM) partially inhibited IL-1beta-induced degradation of IkappaB-alpha in the cytosol, translocation of p65 NF-kappaB from the cytosol to the nucleus and the NF-kappaB-specific DNA-protein complex formation. Taken together, we have demonstrated that byakangelicol inhibits IL-1beta-induced PGE2 release in A549 cells; this inhibition may be mediated by suppression of COX-2 expression and the activity of COX-2 enzyme. The inhibitory mechanism of byakangelicol on IL-1beta-induced COX-2 expression may be, at least in part, through suppression of NF-kappaB activity. Therefore, byakangelicol may have therapeutic potential as an anti-inflammatory drug on airway inflammation.
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Affiliation(s)
- C H Lin
- Graduate Institute of Biomedical Technology, Taipei Medical University, Taiwan
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Abstract
Facial plastic surgeons are frequently called upon to manage facial scars, whether iatrogenic or traumatic. Numerous treatment modalities are available for scar management depending upon scar characteristics, age, and patient expectations. The focus of this article is to review commonly used nonsurgical methods of scar revision. These include topical applications (silicone, vitamin E, pressure dressing, herbal extracts), intralesional medication (steroids, antimitotics), soft tissue augmentation (collagen, fat), laser applications (585-nm flashlamp-pumped pulsed dye, CO(2)), cryotherapy, and make-up camouflage. Nonsurgical modalities can be used as prophylactic prevention of adverse scar formation, as definitive treatment, as intervening therapy until further surgical repair can be made, or as adjunctive treatment following surgical scar revision.
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Affiliation(s)
- C W Chang
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University, Nashville, TN 37232-2559, USA
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Chang CW, Huang SF. Varied clinical patterns, physical activities, muscle enzymes, electromyographic and histologic findings in patients with post-polio syndrome in Taiwan. Spinal Cord 2001; 39:526-31. [PMID: 11641796 DOI: 10.1038/sj.sc.3101202] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
STUDY DESIGN A study of the clinical features, physical activity, muscle enzyme, electromyography and histopathological alternations of muscles in patients with post-polio syndrome (PPS). OBJECTIVE To assess the varied patterns of PPS in Taiwan. SETTING Taiwan. METHODS Thirty-one patients who fulfill the inclusion criteria of PPS were selected for study. Clinical features, physical activity scale, serum concentrations of creatine kinase, electromyography and histopathological alterations of muscles were assessed and correlated to the causes of PPS patients. RESULTS Patients with PPS in Taiwan are relatively young, with a mean age of 39.3 years. Elevated concentration of creatine kinase was found predominantly in male patients with higher physical activities. Electromyographic examinations as well as histological tests of affected muscles revealed prominent evidence of chronic and active denervation with reinnervation in PPS patients. CONCLUSION Patients with PPS in Taiwan are young. Thus, PPS should not be attributed to aging. Physical attrition with degradation of nerve terminals is considered the main cause of this disease. SPONSORSHIP This study was supported by the National Science Council, Republic of China under grant no. NSC-83-0412-B002-302.
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Affiliation(s)
- C W Chang
- Department of Physical Medicine and Rehabilitation, National Taiwan University College of Medicine and National Taiwan University Hospital, Taipei, Taiwan, Republic of China
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Chang CW, Chung H, Huang CF, Su HJ. Exposure assessment to airborne endotoxin, dust, ammonia, hydrogen sulfide and carbon dioxide in open style swine houses. Ann Occup Hyg 2001; 45:457-65. [PMID: 11513795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Information is limited for the exposure levels of airborne hazardous substances in swine feed buildings that are not completely enclosed. Open-style breeding, growing and finishing swine houses in six farms in subtropical Taiwan were studied for the airborne concentrations of endotoxin, dust, ammonia, hydrogen sulfide and carbon dioxide. The air in the farrowing and nursery stalls as partially enclosed was also simultaneously evaluated. Three selected gases and airborne dusts were quantified respectively by using Drager diffusion tubes and a filter-weighing method. Endotoxin was analyzed by the Limulus amoebocyte lysate assay. Average concentration of airborne total endotoxin among piggeries was between 36.8 and 298 EU/m(3), while that for respirable endotoxin was 14.1-129 EU/m(3). Mean concentration of total dust was between 0.15 and 0.34 mg/m(3), with average level of respirable dust of 0.14 mg/m(3). The respective concentrations of NH3, CO2 and H2S were less than 5 ppm, 600-895 ppm and less than 0.2 ppm. Airborne concentrations of total dust and endotoxin in the nursery house were higher than in the other types of swine houses. The finishing house presented the highest exposure risk to NH3, CO2 and H2S. Employees working in the finishing stalls were also exposed to the highest airborne levels of respirable endotoxin and dust. On the other hand, the air of the breeding units was the least contaminated in terms of airborne endotoxin, dust, NH3, CO2 and H2S. The airborne concentrations of substances measured in the present study were all lower than most of published studies conducted in mainly enclosed swine buildings. Distinct characteristics, including maintaining swine houses in an open status and frequent spraying water inside the stalls, significantly reduce accumulation of gases and airborne particulates.
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Affiliation(s)
- C W Chang
- Institute of Occupational Safety and Health, Council of Labor Affairs, Executive Yuan, Taipei, Taiwan, ROC.
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Wu WC, Chang SM, Chen JY, Chang CW. Management of postvitrectomy diabetic vitreous hemorrhage with tissue plasminogen activator (t-PA) and volume homeostatic fluid-fluid exchanger. J Ocul Pharmacol Ther 2001; 17:363-71. [PMID: 11572467 DOI: 10.1089/108076801753162771] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The incidence of recurrent vitreous hemorrhage of proliferative diabetic retinopathy following posterior vitrectomy ranges from 29% to 75% in reported series. Fluid-gas exchange and vitreous cavity lavage are the popular methods of treating this kind of recurrent hemorrhage. The fluid-gas exchange cannot offer clear vision immediately after the procedure. To improve the function of the classic vitreous cavity lavage, we designed a volume homeostatic fluid-fluid exchanger - Chen's I/A device. Tissue plasminogen activator (t-PA) is a protease that preferentially converts fibrin-bound plasminogen to the active proteolytic enzyme, plasmin. It has been clinically and experimentally proven effective in lysis of postvitrectomy blood clot and fibrin formation. When the blood clot is formed in the vitreous cavity, intravitreal injection of t-PA can convert plasminogen to plasmin and remove the clot. From July 1999 to January 2000, ten eyes of postvitrectomy diabetic vitreous hemorrhage (PDVH) were collected. In each case, 4 days after intravitreal injection (IVI) of t-PA (30 microg), vitreous cavity lavage was performed with Chen's I/A device. Of these cases, 8 eyes (80%) experienced an immediate clearing of the vitreous cavity. Early complications included anterior hyaloid fibrovascular proliferation (2 eyes) and postoperative intraocular pressure elevation (3 eyes). On the basis of the results of this study, our conclusion is that volume homeostatic vitreous cavity lavage, combined with intravitreal injection of t-PA, is an excellent method for treatment of postvitrectomy diabetic vitreous hemorrhage but, in cases of PDVH with iris rubeosis, the advantage of this procedure is uncertain.
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Affiliation(s)
- W C Wu
- Department of Ophthalmology, Kaohsiung Medical University, Taiwan, Republic of China.
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Shih YF, Hsiao CK, Chen CJ, Chang CW, Hung PT, Lin LL. An intervention trial on efficacy of atropine and multi-focal glasses in controlling myopic progression. Acta Ophthalmol Scand 2001; 79:233-6. [PMID: 11401629 DOI: 10.1034/j.1600-0420.2001.790304.x] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
PURPOSE This randomized clinical trial assessed the treatment effects of atropine and/or multi-focal lenses in decreasing the progression rate of myopia in children. METHODS Two hundred and twenty-seven schoolchildren with myopia, aged from 6 to 13 years, who were stratified based on gender, age and the initial amount of myopia were randomly assigned to three treatment groups: 0.5% atropine with multi-focal glasses, multi-focal glasses, and single vision spectacles. Each subject was followed for at least eighteen months. These results report on the 188 patients available for the follow-up. RESULTS The mean progression of myopia in atropine with multi-focal glasses group (0.41 D) was significantly less than the multi-focal (1.19 D) and single vision group (1.40 D) (p < 0.0001). But no significant difference was noted between the last two groups (p = 0.44). The progression of myopia was significantly correlated with the increases of axial length (r = 0.65, p = 0.0001), but not with the changes of corneal power (r=-0.09), anterior chamber depth (r = -0.023), lens thickness (r = -0.08), or intra-ocular pressure (r = -0.008). CONCLUSION The 0.5% atropine with multi-focal lenses can slow down the progression rate of myopia. However, multi-focal lenses alone showed no difference in effect compared to control.
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Affiliation(s)
- Y F Shih
- Department of Ophthalmology, National Taiwan University Hospital, Taipei,Institute of Epidemiology, National Taiwan University, Taipei, Taiwan
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