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Chen HW, He Y, Ruan HH, Wu GB, Yu SJ, Wang Y, Chen GD, Qiu J, Wang CX, Chen LZ. [Mid-term efficacy evaluation of ABO incompatible living relative kidney transplantation based on protocol biopsy]. Zhonghua Yi Xue Za Zhi 2024; 104:944-949. [PMID: 38514343 DOI: 10.3760/cma.j.cn112137-20230719-00030] [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] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Objective: To evaluate the mid-term efficacy of ABO incompatible living donor kidney transplantation (ABOi-KT) based on the results of routine renal biopsy for transplantation. Methods: Retrospective collection of clinical data from 23 pairs of ABOi-KT donors and recipients at the First Affiliated Hospital of Sun Yat-sen University from July 2015 to November 2021. ABOi-KT was performed on recipients after desensitization treatment, and the results of routine kidney transplant biopsy at 1 week, 1 month, 3 months, 6 months, and 12 months after surgery were analyzed. Combined with blood type antibody levels and renal function recovery, the mid-term efficacy of ABOi-KT was evaluated. Results: Among the 23 recipients, there were 19 males and 4 females; age range from 19 to 47 years old [(29.6±6.7) years old], all underwent ABOi-KT successfully after receiving desensitization treatment. The follow-up time was (44.6±22.4) months, of which 22 cases were followed up for more than 1 year. The incidence rates of rejection reactions at 1 week, 1 month, 3 months, 6 months, and 12 months after surgery were 15.0% (3/20), 11.1% (1/9), 7.7% (1/13), 25.0% (3/12), and 12.5% (1/8), respectively. For receptors with rejection reactions, targeted anti-rejection therapy was performed based on clinical symptoms and various indicators. Borderline T cell mediated rejection (TCMR) can be converted to mild tubular inflammation after anti-rejection treatment. The positive rate of complement C4d in peritubular capillaries was 95.0% (19/20) one week after surgery, and the positive rate of complement C4d was 100% at 3 and 12 months after surgery. The cumulative survival rates at 1, 3, 5, and 7 years after surgery were all 100%. The cumulative survival rates at 1, 3, 5, and 7 years after kidney transplantation were 100%, 93.3%, 84.0%, and 84.0%, respectively. Except for 2 recipients who underwent transplantation in 2017 and experienced kidney failure at 30 and 49 months after surgery, all other transplanted kidneys survived. Conclusions: The results of routine renal transplant biopsy show that ABOi-KT has a good mid-term therapeutic effect. The pathological changes of ABOi-KT can be dynamically observed through routine renal transplant biopsy and targeted treatment for rejection reactions can be provided accordingly.
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Affiliation(s)
- H W Chen
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Y He
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - H H Ruan
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - G B Wu
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - S J Yu
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Y Wang
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - G D Chen
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - J Qiu
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - C X Wang
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - L Z Chen
- Organ Transplantation Center of the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
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Cui C, Zhou XK, Zhu Y, Shen YM, Chen LD, Ju WZ, Chen HW, Gu K, Li MF, Pan YB, Chen ML. [Repeated stellate ganglion blockade for the treatment of ventricular tachycardia storm in patients with nonischemic cardiomyopathy: a new therapeutic option for patients with malignant arrhythmias]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:521-525. [PMID: 37198124 DOI: 10.3760/cma.j.cn112148-20220525-00411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Objectives: This study sought to describe our institutional experience of repeated percutaneous stellate ganglion blockade (R-SGB) as a treatment option for drug-refractory electrical storm in patients with nonischemic cardiomyopathy (NICM). Methods: This prospective observational study included 8 consecutive NICM patients who had drug-refractory electrical storm and underwent R-SGB between June 1, 2021 and January 31, 2022. Lidocaine (5 ml, 1%) was injected in the vicinity of the left stellate ganglion under the guidance of ultrasound, once per day for 7 days. Data including clinical characteristics, immediate and long-term outcomes, and procedure related complications were collected. Results: The mean age was (51.5±13.6) years. All patients were male. 5 patients were diagnosed as dilated cardiomyopathy, 2 patients as arrhythmogenic right ventricular cardiomyopathy and 1 patient as hypertrophic cardiomyopathy. The left ventricular ejection fraction was 37.8%±6.6%. After the treatment of R-SGB, 6 (75%) patients were free of electrical storm. 24 hours Holter monitoring showed significant reduction in ventricular tachycardia (VT) episodes from 43.0 (13.3, 276.3) to 1.0 (0.3, 34.0) on the first day following R-SGB (P<0.05) and 0.5 (0.0, 19.3) after whole R-SGB process (P<0.05). There were no procedure-related major complications. The mean follow-up was (4.8±1.1) months, and the median time of recurrent VT was 2 months. Conclusion: Minimally invasive R-SGB is a safe and effective method to treat electrical storm in patients with NICM.
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Affiliation(s)
- C Cui
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - X K Zhou
- Department of Anaesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Y Zhu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Y M Shen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - L D Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - W Z Ju
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - H W Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - K Gu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - M F Li
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Y B Pan
- Department of Anaesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - M L Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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Dong JC, Liao Y, Chen HW, Song ZC. [Outcome of lingual gingival recession treated with the tunnel technique plus subepithelial connective tissue graft technique: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:1243-1246. [PMID: 36509525 DOI: 10.3760/cma.j.cn112144-20220405-00155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- J C Dong
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology & Research Unit of Oral and Maxillofacial Regenerative Medicine, Chinese Academy of Medical Sciences, Shanghai 200011, China
| | - Y Liao
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology & Research Unit of Oral and Maxillofacial Regenerative Medicine, Chinese Academy of Medical Sciences, Shanghai 200011, China
| | - H W Chen
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology & Research Unit of Oral and Maxillofacial Regenerative Medicine, Chinese Academy of Medical Sciences, Shanghai 200011, China
| | - Z C Song
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology & Research Unit of Oral and Maxillofacial Regenerative Medicine, Chinese Academy of Medical Sciences, Shanghai 200011, China
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Chen HW, Ma YN, Zhang RY, Jin ZL. [Progress in application of deep learning in orthodontic diagnosis and treatment]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:1182-1187. [PMID: 36379900 DOI: 10.3760/cma.j.cn112144-20220712-00381] [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: 06/16/2023]
Abstract
In recent years, the application of artificial intelligence technology in the field of orthodontics has gradually increased, and deep learning, as a hot direction, has also been rapidly applied in the detection, evaluation, diagnosis, prediction and effect evaluation. At present, deep learning research has the advantages of high efficiency and accuracy, but it also has limitations such as weak interpretability and insufficient data volume. This paper reviewed the proposal and development of deep learning, the application in orthodontic diagnosis and treatment, as well as the limitations and countermeasures of the popularization, and prospect of the future research.
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Affiliation(s)
- H W Chen
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - Y N Ma
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - R Y Zhang
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - Z L Jin
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
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Wang L, Calabria J, Chen HW, Somssich M. The Arabidopsis thaliana-Fusarium oxysporum strain 5176 pathosystem: an overview. J Exp Bot 2022; 73:6052-6067. [PMID: 35709954 PMCID: PMC9578349 DOI: 10.1093/jxb/erac263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Fusarium oxysporum is a soil-borne fungal pathogen of several major food crops. Research on understanding the molecular details of fungal infection and the plant's defense mechanisms against this pathogen has long focused mainly on the tomato-infecting F. oxysporum strains and their specific host plant. However, in recent years, the Arabidopsis thaliana-Fusarium oxysporum strain 5176 (Fo5176) pathosystem has additionally been established to study this plant-pathogen interaction with all the molecular biology, genetic, and genomic tools available for the A. thaliana model system. Work on this system has since produced several new insights, especially with regards to the role of phytohormones involved in the plant's defense response, and the receptor proteins and peptide ligands involved in pathogen detection. Furthermore, work with the pathogenic strain Fo5176 and the related endophytic strain Fo47 has demonstrated the suitability of this system for comparative studies of the plant's specific responses to general microbe- or pathogen-associated molecular patterns. In this review, we highlight the advantages of this specific pathosystem, summarize the advances made in studying the molecular details of this plant-fungus interaction, and point out open questions that remain to be answered.
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Affiliation(s)
- Liu Wang
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Jacob Calabria
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Hsiang-Wen Chen
- School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia
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Huang PQ, Du H, Chen HB, Li Y, Chen HW, Lei XL, Zhang MR, Lu XX. Invasive pulmonary fungal infections in children with severe human adenovirus type 7 pneumonia: A retrospective study. Pediatr Neonatol 2022; 63:388-393. [PMID: 35474019 DOI: 10.1016/j.pedneo.2022.03.004] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/31/2020] [Accepted: 03/25/2022] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND There has been a rapid increase in the number of human adenovirus type 7 (HAdV-7) and invasive pulmonary fungal infections (IPFIs) co-infection. METHODS In this study, we included patients with confirmed HAdV-7 infection during the period from 2018 to 2019 to explore clinical characteristics of severe HAdV-7 pneumonia combined with IPFIs. RESULTS Among the 143 patients, 35 cases were co-infected with IPFIs. Others were assigned to the control group (n Z 108). Patients wereprone to be complicated with respiratory failure, heart failure and hemophagocytic syndromein IPFIs group. Thirty-one species of fungi were detected in the IPFIs group, among whichAspergillus was the most common species. Compared to control group, patients had lowerlevels of WBC, CD3þ T lymphocyte counts and CD19þ B lymphocyte counts in IPFIs group. CONCLUSION Aspergillus is the most common species in IPFIs combined with severe HAdV-7 pneumonia. For children with severe HAdV-7 pneumonia who are younger, have a long course of disease, and have been admitted to the ICU, we should predict the occurrence of IPFIs when there is multi-system dysfunction and the reduction of CD3+ T lymphocyte counts and CD19+ B lymphocyte counts in course of their disease.
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Affiliation(s)
- P Q Huang
- Department of Electrocardiogram, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - H Du
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - H B Chen
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - Y Li
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - H W Chen
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - X L Lei
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - M R Zhang
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - X X Lu
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China.
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Wang Z, Shi LS, Liu HL, Wang ZZ, Jiang XH, Chen HW, Yang G, Gu K, Ju WZ, Chen M. [Clinical characteristics and long-term follow-up results of radiofrequency ablation for the treatment of ventricular tachycardia in patients with arrhythmogenic left ventricular cardiomyopathy]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:549-555. [PMID: 35705463 DOI: 10.3760/cma.j.cn112148-20210927-00832] [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: 06/15/2023]
Abstract
Objective: To investigate the acute and long-term outcome of catheter ablation for the treatment of ventricular tachycardia (VT) in patients with arrhythmogenic left ventricular cardiomyopathy (ALVC). Methods: This retrospective, cross-sectional study enrolled ALVC patients undergoing radiofrequency ablation for the treatment of VT at the First Affiliated Hospital of Nanjing Medical University from January 2011 to December 2018 and collected their clinical characteristics and intraoperative electrophysiological examination. Patients were followed up every 6 months after radiofrequency ablation until August 2021. Echocardiographic results and VT recurrence post radiofrequency ablation were analysed. Results: Totally 12 patients were enrolled (mean age: (42±15) years, 11 males(11/12)). The mean of left ventricular end diastolic diameter (LVDd) and left ventricular ejection fraction (LVEF) were (51±5)mm and (65±5)%, respectively. Twelve VTs were induced in 10 patients during the electrophysiological study, and the mean tachycardia cycle length was (293±65) ms. Three-dimensional substrate mapping revealed the diseased area at endocardial site in one patient, at epicardial sites in the other 11 patients (involved endocardial sites in 2 cases) with the basal part near the mitral annulus being the predilection for the substrate (10/11). After the catheter ablation at the endocardial and epicardial sites respectively, the complete procedure endpoint was achieved in all patients (VT cannot be induced post ablation). The median follow-up time was 65 (25, 123) months. One patient was lost to follow-up, and the other 11 patients survived without VT. No significant cardiac function deterioration was detected by the echocardiographic examination ((51±5)mm vs. (52±5)mm, P>0.05 for LVDd, (65±5)% vs. (60±6)%, P>0.05 for LVEF) at the end of follow-up. Conclusion: After radiofrequency ablation, the complete procedure endpoint is achieved in ALVC patients, and the catheter ablation provides long-term ventricular tachycardia control during the long-term follow-up.
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Affiliation(s)
- Z Wang
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - L S Shi
- Department of Cardiology, Second Affiliated Hospital of Nantong University, Nantong 226001, China
| | - H L Liu
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - Z Z Wang
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - X H Jiang
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - H W Chen
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - G Yang
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - K Gu
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - W Z Ju
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
| | - Minglong Chen
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210000 China
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Lee CF, Hsu YH, Lin YC, Nguyen TT, Chen HW, Nabilla SC, Hou SY, Chang FC, Chung RJ. 3D Printing of Collagen/Oligomeric Proanthocyanidin/Oxidized Hyaluronic Acid Composite Scaffolds for Articular Cartilage Repair. Polymers (Basel) 2021; 13:polym13183123. [PMID: 34578024 PMCID: PMC8467469 DOI: 10.3390/polym13183123] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/03/2021] [Accepted: 09/08/2021] [Indexed: 11/16/2022] Open
Abstract
Articular cartilage defects affect millions of people worldwide, including children, adolescents, and adults. Progressive wear and tear of articular cartilage can lead to progressive tissue loss, further exposing the bony ends and leaving them unprotected, which may ultimately cause osteoarthritis (degenerative joint disease). Unlike other self-repairing tissues, cartilage has a low regenerative capacity; once injured, the cartilage is much more difficult to heal. Consequently, developing methods to repair this defect remains a challenge in clinical practice. In recent years, tissue engineering applications have employed the use of three-dimensional (3D) porous scaffolds for growing cells to regenerate damaged cartilage. However, these scaffolds are mainly chemically synthesized polymers or are crosslinked using organic solvents. Utilizing 3D printing technologies to prepare biodegradable natural composite scaffolds could replace chemically synthesized polymers with more natural polymers or low-toxicity crosslinkers. In this study, collagen/oligomeric proanthocyanidin/oxidized hyaluronic acid composite scaffolds showing high biocompatibility and excellent mechanical properties were prepared. The compressive strengths of the scaffolds were between 0.25–0.55 MPa. Cell viability of the 3D scaffolds reached up to 90%, which indicates that they are favorable surfaces for the deposition of apatite. An in vivo test was performed using the Sprague Dawley (SD) rat skull model. Histological images revealed signs of angiogenesis and new bone formation. Therefore, 3D collagen-based scaffolds can be used as potential candidates for articular cartilage repair.
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Affiliation(s)
- Chung-Fei Lee
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech.), Taipei 10608, Taiwan; (C.-F.L.); (T.-T.N.); (H.-W.C.); (S.-Y.H.)
| | - Yung-Heng Hsu
- Bone and Joint Research Center, Chang Gung Memorial Hospital, Linko 33305, Taiwan;
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Linko 33305, Taiwan
- College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yu-Chien Lin
- Department of Materials, Imperial College London, London SW7 2BP, UK;
| | - Thu-Trang Nguyen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech.), Taipei 10608, Taiwan; (C.-F.L.); (T.-T.N.); (H.-W.C.); (S.-Y.H.)
| | - Hsiang-Wen Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech.), Taipei 10608, Taiwan; (C.-F.L.); (T.-T.N.); (H.-W.C.); (S.-Y.H.)
| | | | - Shao-Yi Hou
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech.), Taipei 10608, Taiwan; (C.-F.L.); (T.-T.N.); (H.-W.C.); (S.-Y.H.)
| | - Feng-Cheng Chang
- School of Forestry and Resource Conservation, National Taiwan University, Taipei 10617, Taiwan;
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech.), Taipei 10608, Taiwan; (C.-F.L.); (T.-T.N.); (H.-W.C.); (S.-Y.H.)
- Correspondence: ; Tel.: +886-2-8772-8701
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Su ZH, Li SJ, Chen HW, Zhang H. [Comparison of trends in congenital heart disease mortality from 1990 to 2017 between China and North America]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:269-275. [PMID: 33706462 DOI: 10.3760/cma.j.cn112148-20200618-00496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare trends in congenital heart disease (CHD) mortality between China and North America from 1990 to 2017. Methods: Using the data from the Global Burden Of Disease (GBD) study 2017, we analyzed the related indicators of CHD mortality in China and North America from 1990 to 2017, including standardized mortality, number of deaths, age distribution of death population and age-specific mortality of CHD in each birth cohort. Age-period-cohort model was used to calculate the annual percent change of age-standardized and age-specific mortality rates of CHD (% per year), period effect-adjusted age-specific mortality rates, and the relative risk of death among CHD population at different time periods (2000-2004 as reference period) and different birth cohorts (1970 as reference cohort). Results: In 2017, the age-standardized mortality rates for CHD in China and North America were 2.63/100 000 and 1.13/100 000 respectively, a decrease of 50.4% and 49.4% compared to 1990. Of all deaths from CHD in China, 76.8% were found in children under 5 years, which was higher than that in North America (51.7%). For population under 40 years, the period effect-adjusted age-specific mortality was higher in China (0.46-167.94 per 100 000 person-years) than in North America (0.68-22.47 per 100 000 person-years); whereas for population over 40 years, mortality was lower in China (0.13-0.34/100 000 person years) than in North America (0.43-0.72/100 000 person-years).From 1990 to 2017, CHD mortality in China decreased by 1.95% per year. The annual decrease of mortality ranged from 1.95% to 3.64% per year in population under 45 years, but the mortality showed increasing trends among those over 50 years. In 2015-2019, the relative risk of death from CHD decreased by 31% in China and 24% in North America. For 2015 birth cohort, the relative risk of death decreased by 84% in China and by 64% in North America. Conclusions: In the past 30 years, the risk of death from CHD in China has significantly decreased, and the survival gap with North America is dramatically narrowed. However, mortality is higher among younger populations in China than in North America, and the mortality in the elders shows increasing trends each year in China.
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Affiliation(s)
- Z H Su
- Pediatric Cardiac Surgery Center, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S J Li
- Pediatric Cardiac Surgery Center, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - H W Chen
- Department of Cardiothoracic surgery, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine; Shanghai Institute of Pediatric Congenital Heart Diseases, National Children's Medical Center, Shanghai 200127, China
| | - H Zhang
- Department of Cardiothoracic surgery, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine; Shanghai Institute of Pediatric Congenital Heart Diseases, National Children's Medical Center, Shanghai 200127, China
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Shih CJ, Chen HW, Hsieh HY, Lai YH, Chiu FY, Chen YR, Tu SL. Heterogeneous Nuclear Ribonucleoprotein H1 Coordinates with Phytochrome and the U1 snRNP Complex to Regulate Alternative Splicing in Physcomitrella patens. Plant Cell 2019; 31:2510-2524. [PMID: 31409629 PMCID: PMC6790087 DOI: 10.1105/tpc.19.00314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/15/2019] [Accepted: 08/06/2019] [Indexed: 05/03/2023]
Abstract
Plant photoreceptors tightly regulate gene expression to control photomorphogenic responses. Although gene expression is modulated by photoreceptors at various levels, the regulatory mechanism at the pre-mRNA splicing step remains unclear. Alternative splicing, a widespread mechanism in eukaryotes that generates two or more mRNAs from the same pre-mRNA, is largely controlled by splicing regulators, which recruit spliceosomal components to initiate pre-mRNA splicing. The red/far-red light photoreceptor phytochrome participates in light-mediated splicing regulation, but the detailed mechanism remains unclear. Here, using protein-protein interaction analysis, we demonstrate that in the moss Physcomitrella patens, phytochrome4 physically interacts with the splicing regulator heterogeneous nuclear ribonucleoprotein H1 (PphnRNP-H1) in the nucleus, a process dependent on red light. We show that PphnRNP-H1 is involved in red light-mediated phototropic responses in P. patens and that it binds with higher affinity to the splicing factor pre-mRNA-processing factor39-1 (PpPRP39-1) in the presence of red light-activated phytochromes. Furthermore, PpPRP39-1 associates with the core component of U1 small nuclear RNP in P. patens Genome-wide analyses demonstrated the involvement of both PphnRNP-H1 and PpPRP39-1 in light-mediated splicing regulation. Our results suggest that phytochromes target the early step of spliceosome assembly via a cascade of protein-protein interactions to control pre-mRNA splicing and photomorphogenic responses.
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Affiliation(s)
- Chueh-Ju Shih
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Chung-Hsing University and Academia Sinica, Taipei 11529, Taiwan
- Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung 402, Taiwan
| | - Hsiang-Wen Chen
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Hsin-Yu Hsieh
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Yung-Hua Lai
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Fang-Yi Chiu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Yu-Rong Chen
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Shih-Long Tu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Chung-Hsing University and Academia Sinica, Taipei 11529, Taiwan
- Biotechnology Center, National Chung-Hsing University, Taichung 402, Taiwan
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11
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Chen HW, Chen YW, Kuo JL, Lai YC, Chou FC, Du CH, Liu HL. Spin-charge-lattice coupling in YBaCuFeO 5: Optical properties and first-principles calculations. Sci Rep 2019; 9:3223. [PMID: 30824718 PMCID: PMC6397168 DOI: 10.1038/s41598-019-39031-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 12/10/2018] [Indexed: 11/11/2022] Open
Abstract
We combined spectroscopic ellipsometry, Raman scattering spectroscopy, and first-principles calculations to explore the optical properties of YBaCuFeO5 single crystals. Measuring the optical absorption spectrum of YBaCuFeO5 at room temperature revealed a direct optical band gap at approximately 1.41 eV and five bands near 1.69, 2.47, 3.16, 4.26, and 5.54 eV. Based on first-principles calculations, the observed optical excitations were appropriately assigned. Analysis of the temperature dependence of the band gap indicated anomalies in antiferromagnetic phase transition at 455 and 175 K. Additionally, a hardening in the frequency of the Eg phonon mode was observed at 175 K. The value of the spin-phonon coupling constant was 15.7 mRy/Å2. These results suggest a complex nature of spin-charge-lattice interactions in YBaCuFeO5.
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Affiliation(s)
- H W Chen
- Department of Physics, National Taiwan Normal University, Taipei, 11677, Taiwan
| | - Y-W Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - J-L Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - Y C Lai
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617, Taiwan
- Department of Physics, Tamkang University, Tamsui, New Taipei City, 25137, Taiwan
| | - F C Chou
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - C H Du
- Department of Physics, Tamkang University, Tamsui, New Taipei City, 25137, Taiwan
| | - H L Liu
- Department of Physics, National Taiwan Normal University, Taipei, 11677, Taiwan.
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12
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Chen HW, Chen YY, Bao ZL. [Efficacy and safety of specific sublingual immunotherapy in children with allergic asthma and rhinitis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:223-226. [PMID: 29871228 DOI: 10.13201/j.issn.1001-1781.2017.03.014] [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] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 11/12/2022]
Abstract
Objective:To evaluate the efficacy and safety of specific sublingual immunotherapy (SLIT) with Dermatophagoides farina drops in different courses with allergic asthma and allergic rhinitis.Method:This study retrospectively analyzed the efficacy of SLIT in 158 children with allergic asthma and rhinitis which induced by house dust mites. The children were treated with Dermatophagoides farina drops; clinical observation and follow-up study were conducted. According to the treatment duration, children were divided into 4 groups (1-year, 2-year, 3-year, and 4-year). Symptom scores and medication scores were recorded at each visit. Asthma symptom scores (day and night), the rhinitis symptom scoresand medication scores were evaluated in 4 groups before and after SLIT. The adverse events during the treatment were collected.Result:There were significant differences in asthma symptom scores (day, night), asthma medication scores, rhinitis symptom scores, rhinitis medication scores among children who accepted 1-year, 2-year, 3-year and 4-year SLI treatment as compared with baseline (P< 0.01). As compared with 1-year, 2-year, 3-year groups, the asthma medication scores of 4-year group had obviously decrease (P< 0.05). Rhinitis medication score of SLIT3 years group was significantly lower than 2 years group (P< 0.05). Asthma symptom scores in the day, asthma symptom scores at night, rhinitis symptom scores of four groups children had no statistically significant difference (P>0.05).Conclusion:Different courses of sublingual immunotherapy with Dermatophagoides farina drops had significant effects; the 4-year course of treatment showed the best effect.
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Affiliation(s)
- H W Chen
- Nanning City Maternal and Child Health Care Hospital, Guangxi Zhuang Autonomous Region, Nanning, 530011, China
| | - Y Y Chen
- Nanning City Maternal and Child Health Care Hospital, Guangxi Zhuang Autonomous Region, Nanning, 530011, China
| | - Z L Bao
- Nanning City Maternal and Child Health Care Hospital, Guangxi Zhuang Autonomous Region, Nanning, 530011, China
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13
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Chen HW, Persson S, Grebe M, McFarlane HE. Cellulose synthesis during cell plate assembly. Physiol Plant 2018; 164:17-26. [PMID: 29418000 DOI: 10.1111/ppl.12703] [Citation(s) in RCA: 5] [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] [Received: 11/07/2017] [Revised: 01/12/2018] [Accepted: 02/04/2018] [Indexed: 05/07/2023]
Abstract
The plant cell wall surrounds and protects the cells. To divide, plant cells must synthesize a new cell wall to separate the two daughter cells. The cell plate is a transient polysaccharide-based compartment that grows between daughter cells and gives rise to the new cell wall. Cellulose constitutes a key component of the cell wall, and mutants with defects in cellulose synthesis commonly share phenotypes with cytokinesis-defective mutants. However, despite the importance of cellulose in the cell plate and the daughter cell wall, many open questions remain regarding the timing and regulation of cellulose synthesis during cell division. These questions represent a critical gap in our knowledge of cell plate assembly, cell division and growth. Here, we review what is known about cellulose synthesis at the cell plate and in the newly formed cross-wall and pose key questions about the molecular mechanisms that govern these processes. We further provide an outlook discussing outstanding questions and possible future directions for this field of research.
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Affiliation(s)
- Hsiang-Wen Chen
- School of Biosciences, University of Melbourne, Melbourne, Victoria 3010, Australia
- Institute of Biochemistry and Biology, Plant Physiology, University of Potsdam, Potsdam D-14476, Germany
| | - Staffan Persson
- School of Biosciences, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Markus Grebe
- Institute of Biochemistry and Biology, Plant Physiology, University of Potsdam, Potsdam D-14476, Germany
| | - Heather E McFarlane
- School of Biosciences, University of Melbourne, Melbourne, Victoria 3010, Australia
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14
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Yu JT, Chen HW, Xue X. P4806Difference of efficacy and safety of left atrial appendage closure using watchman between patients aged less than 75 to more than 75 years. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4806] [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: 11/14/2022] Open
Affiliation(s)
- J T Yu
- Helmut-G.-Walther Klinikum, Cardiology, Lichtenfels, Germany
| | - H W Chen
- The First Affiliated Hospital of University of Science and Technology of China, Cardiology, Hefei, China People's Republic of
| | - X Xue
- the Second Hospital of Jilin University, Cardiology Department, Changchun, China People's Republic of
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15
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Chen HW, Zhou W, Liao Y, Hu SC, Chen TL, Song ZC. Analysis of metabolic profiles of generalized aggressive periodontitis. J Periodontal Res 2018; 53:894-901. [PMID: 29974463 DOI: 10.1111/jre.12579] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/06/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND OBJECTIVE The specific pathogenesis of generalized aggressive periodontitis (GAgP) has not yet been clarified, and few studies have focused on the association between GAgP and metabolomics. To elucidate the roles of metabolic profiles in the status of GAgP, this study aimed to identify the differential metabolic profiles between patients with GAgP and healthy controls using an untargeted metabolomic profiling method. MATERIAL AND METHODS Serum and gingival crevicular fluid samples were collected from healthy controls (n = 20) and patients with GAgP (n = 20) in this cross-sectional study. The relative levels of biomarkers in the samples were measured by gas chromatography-mass spectrometry. Principal components analysis and orthogonal partial least-squares discriminant analysis were used for statistical analysis. Metabolites were analysed qualitatively using the FiehnLib and NIST databases. Full-mouth probing depth and clinical attachment loss were recorded as indexes of periodontal disease. RESULTS A total of 349 metabolites were qualitatively detected in the gingival crevicular fluid samples, and 200 metabolites were detected in the serum samples. Compared with healthy controls, patients with GAgP showed significant increases in serum urea and allo-inositol levels. In contrast, glutathione, 2,5-dihydroxybenzaldehyde, adipic acid and 2-deoxyguanosine levels were decreased in patients with GAgP. In the gingival crevicular fluid samples, noradrenaline, uridine, α-tocopherol, dehydroascorbic acid, xanthine, galactose, glucose-1-phosphate and ribulose-5-phosphate levels were increased in patients with GAgP, while thymidine, glutathione and ribose-5-phosphate levels were decreased. CONCLUSION The metabolomics analysis by gas chromatography-mass spectrometry is an effective and minimally non-invasive way to differentiate the metabolites characteristic of patients with GAgP. Both serum and gingival crevicular fluid metabolomics are significantly different between patients with GAgP and healthy controls. These metabolic profiles have great potential in detecting GAgP and helping to understand its underlying mechanisms.
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Affiliation(s)
- H W Chen
- Department of Periodontology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, China
| | - W Zhou
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, China.,Laboratory of Oral Microbiota and Systemic Diseases, Shanghai Research Institute of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Liao
- Department of Periodontology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, China
| | - S C Hu
- Department of Periodontology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, China
| | - T L Chen
- Department of Periodontology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, China
| | - Z C Song
- Department of Periodontology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center of Stomatology, Shanghai, China
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16
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Loong SK, Khor CS, Chen HW, Chao CC, Ling ISC, Abdul Rahim NF, Hassan HS, Nellis S, Ching WM, AbuBakar S. Serological evidence of high Leptospira exposure among indigenous people (Orang Asli) in Peninsular Malaysia using a recombinant antigen-based ELISA. Trop Biomed 2018; 35:1-9. [PMID: 33601771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The lifestyles of the indigenous people (Orang Asli) of Peninsular Malaysia who traditionally live close to the forest, put them at higher risk of exposure to zoonotic diseases. Leptospirosis has recently emerged as one of the most important diseases of public health concern. Here, we aimed to obtain a baseline data on the level of Leptospira exposure among the 107 Orang Asli volunteers using a recombinant antigen-based ELISA, previously shown to have sensitivity of ~90.0% in comparison to the microscopic agglutination test (MAT). Among the Orang Asli volunteers in this study, 60.7% had IgM against Leptospira and 57.9% were antiLeptospira IgG positive. Of these seropositive individuals, 29.9% had both anti-Leptospira IgM and IgG antibodies. Age was found to be a significant predictor for exposure to Leptospira (P < 0.05) with the younger Orang Asli population more likely to be tested positive for antiLeptospira IgM. The finding of high Leptospira exposure among the Orang Asli volunteers could be due to their socio-economic practices and dependency on the forest for their livelihood. The rapid and sensitive recombinant antigen-based ELISA used in the study, could possibly complement MAT for the epidemiological surveillance of leptospirosis, especially among the underserved populations.
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Affiliation(s)
- S K Loong
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - C S Khor
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
- Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, United States of America
| | - H W Chen
- Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, Maryland 20910, United States of America
- Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, United States of America
| | - C C Chao
- Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, Maryland 20910, United States of America
| | - I S C Ling
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - N F Abdul Rahim
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - H S Hassan
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - S Nellis
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - W M Ching
- Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, Maryland 20910, United States of America
- Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, United States of America
| | - S AbuBakar
- Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, 50603 Kuala Lumpur, Malaysia
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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17
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Wang L, Liu SY, Chen HW, Xu J, Chapon M, Zhang T, Zhou F, Wang YE, Quanquin N, Wang G, Tian X, He Z, Liu L, Yu W, Sanchez DJ, Liang Y, Jiang T, Modlin R, Bloom BR, Li Q, Deng JC, Zhou P, Qin FXF, Cheng G. Generation of a Live Attenuated Influenza Vaccine that Elicits Broad Protection in Mice and Ferrets. Cell Host Microbe 2017; 21:334-343. [PMID: 28279345 DOI: 10.1016/j.chom.2017.02.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/05/2017] [Accepted: 02/06/2017] [Indexed: 11/18/2022]
Abstract
New influenza vaccines that provide effective and broad protection are desperately needed. Live attenuated viruses are attractive vaccine candidates because they can elicit both humoral and cellular immune responses. However, recent formulations of live attenuated influenza vaccines (LAIVs) have not been protective. We combined high-coverage transposon mutagenesis of influenza virus with a rapid high-throughput screening for attenuation to generate W7-791, a live attenuated mutant virus strain. W7-791 produced only a transient asymptomatic infection in adult and neonatal mice even at doses 100-fold higher than the LD50 of the parent strain. A single administration of W7-791 conferred full protection to mice against lethal challenge with H1N1, H3N2, and H5N1 strains, and improved viral clearance in ferrets. Adoptive transfer of T cells from W7-791-immunized mice conferred heterologous protection, indicating a role for T cell-mediated immunity. These studies present an LAIV development strategy to rapidly generate and screen entire libraries of viral clones.
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Affiliation(s)
- Lulan Wang
- Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China; Suzhou Institute of Systems Medicine, Suzhou 215123, China; Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Su-Yang Liu
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Hsiang-Wen Chen
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Microbiology, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Juan Xu
- Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China; Suzhou Institute of Systems Medicine, Suzhou 215123, China
| | - Maxime Chapon
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Tao Zhang
- Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China; Suzhou Institute of Systems Medicine, Suzhou 215123, China
| | - Fan Zhou
- Unit of Anti-Viral Immunity and Genetic Therapy, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, China
| | - Yao E Wang
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Natalie Quanquin
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Guiqin Wang
- Unit of Anti-Viral Immunity and Genetic Therapy, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, China
| | - Xiaoli Tian
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Zhanlong He
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming 650106, China
| | - Longding Liu
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming 650106, China
| | - Wenhai Yu
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming 650106, China
| | - David Jesse Sanchez
- Department of Pharmaceutical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Yuying Liang
- 295K Animal Science/Veterinary Medicine, University of Minnesota, 1988 Fitch Avenue, St. Paul, MN 55108, USA
| | - Taijiao Jiang
- Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China; Suzhou Institute of Systems Medicine, Suzhou 215123, China
| | - Robert Modlin
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA; Division of Dermatology, Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Barry R Bloom
- Harvard School of Public Health, Boston, MA 02115, USA
| | - Qihan Li
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming 650106, China
| | - Jane C Deng
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Paul Zhou
- Unit of Anti-Viral Immunity and Genetic Therapy, Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, China
| | - F Xiao-Feng Qin
- Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China; Suzhou Institute of Systems Medicine, Suzhou 215123, China.
| | - Genhong Cheng
- Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China; Suzhou Institute of Systems Medicine, Suzhou 215123, China; Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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18
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Ma X, Zhao YF, Tian WJ, Qian Z, Chen HW, Wu YY, Liu XF. A novel Al matrix composite reinforced by nano-AlN p network. Sci Rep 2016; 6:34919. [PMID: 27721417 PMCID: PMC5056514 DOI: 10.1038/srep34919] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 09/21/2016] [Indexed: 11/09/2022] Open
Abstract
In pursuit of lightweighting of automobiles and low emission of transportation, the efforts to develop high-strength, heat-resistant and fatigue-resistant Al alloys and/or composites have been ongoing. Here we report a novel Al matrix composite with ultrahigh strength reinforced by a three dimensional network of nano-AlN particles for the first time. The in-situ synthesized AlN particles are connected by twinning bonding chains and built up a three dimensional network strengthening Al matrix enormously like the skeleton to human body. The composite containing 16.4wt.% AlN particles shows excellent properties: the ultimate tensile strengths can be up to 518MPa at room temperature and 190MPa at 350 °C. This peculiar performance results from the novel spatial distribution of nano-scale AlN particles. Our findings in this work would help to develop a potential candidate for high-performance heat resistance light-metal based materials.
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Affiliation(s)
- X Ma
- Key Laboratory for Liquid-Solid Structural Evolution &Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - Y F Zhao
- Key Laboratory for Liquid-Solid Structural Evolution &Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - W J Tian
- Key Laboratory for Liquid-Solid Structural Evolution &Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - Z Qian
- Key Laboratory for Liquid-Solid Structural Evolution &Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - H W Chen
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Y Y Wu
- Key Laboratory for Liquid-Solid Structural Evolution &Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - X F Liu
- Key Laboratory for Liquid-Solid Structural Evolution &Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
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Abstract
Disseminated intravascular coagulation (DIC) is a lethal situation in severe infections, characterized by the systemic formation of microthrombi complicated with bleeding tendency and organ dysfunction. Current clinical trials are not promising. In this study, we investigated the protective effect of curcumin in a lipopolysaccharide (LPS)-induced DIC model in rats. Experimental DIC was induced by sustained infusion of LPS (10 mg/kg body weight) for 4 h through the tail vein. Curcumin (60 mg/kg body weight) was given intraperitoneally 3 h before LPS infusion. Results showed that, in vivo, curcumin reduced the mortality rate of LPS-infused rats by decreasing the circulating TNF-α levels and the consumption of peripheral platelets and plasma fibrinogen. Furthermore, in vivo curcumin also has the effect of preventing the formation of fibrin deposition in the glomeruli of kidney. These results reveal the therapeutic potential of curcumin in infection-related coagulopathy of DIC.
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Affiliation(s)
- Hsiang-Wen Chen
- Department of Microbiology, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan.
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20
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Kong XY, Ma LK, Chen HW. [Post percutaneous coronary intervention follow-up result in a patient with hemophilia A and acute coronary syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2016; 44:628-629. [PMID: 27530950 DOI: 10.3760/cma.j.issn.0253-3758.2016.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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21
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Chen HW, Shao KH, Wang SJ. Light-mediated modulation of helix angle and rate of seminal root tip movement determines root morphology of young rice seedlings. Plant Signal Behav 2016; 11:e1141861. [PMID: 26829414 PMCID: PMC4883842 DOI: 10.1080/15592324.2016.1141861] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 06/05/2023]
Abstract
Seminal root growth is one of the factors to determine rice seedling establishment. Our previous reports showed light can induce Z-type wavy root and coiling root morphology in several rice (Oryza sativa L.) varieties, and the regulated Z-type and unregulated coil seminal roots were resulted by different circumnutational trajectories. Moreover, the light-induced seminal root waving was conducted by an NO-dependent signaling pathway. In order to further reveal the difference of root tip movement between straight and wavy seminal roots; here, the root tip movement trajectories of Tainung 67 variety (TNG67; presented straight root in light conditions) and Taichung Native 1 (TCN1; presented Z-type wavy root in light) were recorded and analyzed in both white light and dark (dim far-red light was applied in dark for taking time-lapse photography) conditions. The results showed the root tip movement of both rice varieties in low intensity of dim far-red light conditions were followed the circumnutation path. However, the stimuli of high intensity of white light would increase the root helix angle in TCN1 seedlings but not in TNG67. In addition, slowing down the rate of root helix was induced by white light treatment in TCN1 but not in TNG67 seedlings. In conclusion, changes of TCN1 rice seminal root morphology from straight to wavy type stimulated by light was resulted by both helix angle increasing and circumnutation rate slowing of root tip movement.
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Affiliation(s)
- Hsiang-Wen Chen
- Department of Agronomy, National Taiwan University, Taipei, Taiwan
| | - Ko-Hsuan Shao
- Department of Agronomy, National Taiwan University, Taipei, Taiwan
| | - Shu-Jen Wang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan
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Wang XY, Chen XL, Wang L, Chen HW. High-dose glucocorticoids increases the expression of mineralocorticoid receptor in vascular endothelial cells. Eur Rev Med Pharmacol Sci 2015; 19:4314-4323. [PMID: 26636519] [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: 06/05/2023]
Abstract
OBJECTIVE To explore the role of glucocorticoid new mechanism to observe the expression of glucocorticoid receptor (GR) and mineralocorticoid receptor (MR) with lipopolysaccharide (LPS) and dexamethasone (Dex) in human umbilical vein endothelial cells (HUVEC). MATERIALS AND METHODS LPS "injured" endothelial cells with Dex for "treatment", and then detected the expression of glucocorticoid receptor (GR) and mineralocorticoid receptor (MR) in the endothelial cells by RT-PCR and immunohistochemistry. RESULTS With high dose (10-6 mol/L) of Dex to stimulate cell 3h, GRmRNA no significant changes in the expression, 6h began to decrease, 12h peak, 24h recovered nearly the level before stimulation. Using different concentrations of Dex and 100 ng/ml LPS stimulation, HUVEC MRmRNA expression was decreased, and high dose (10-6 mol/L) of Dex to stimulate cell 3h, MRmRNA no significant changes in expression, and GRmRNA The difference is that the expression began to increase 6h, 12h, peaked, 24h rebound near the level before stimulation. Immunohistochemistry results consistent with the RT-PCR. CONCLUSIONS Large dose of DEX (10-6 mol/l) up-regulated the expression of MR and GR in the reduction of the contrast exactly. GC induced the expression of GR and MR in different changes of stress injury of the body may be a regulatory mechanism, and indicate one new mechanism of glucocorticoid exist.
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Affiliation(s)
- X Y Wang
- Department of Respiratory Medicine, General Hospital of Beijing Military Region, Beijing, China.
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Chen HW, Shao KH, Wang SJ. Light-modulated seminal wavy roots in rice mediated by nitric oxide-dependent signaling. Protoplasma 2015; 252:1291-1304. [PMID: 25619895 DOI: 10.1007/s00709-015-0762-0] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 01/12/2015] [Indexed: 06/04/2023]
Abstract
Rice (Oryza sativa L.) seminal roots from germinated seeds help establish seedlings, but the seminal root growth and morphology are sensitive to environmental factors. Our previous research showed that several indica-type rice varieties such as Taichung native 1 (TCN1) showed light-induced wavy roots. Also, auxin and oxylipins are two signaling factors regulating the wavy root photomorphology. To investigate the signaling pathway, here, we found that nitric oxide (NO) was a second messenger triggering the signal transduction of light stimuli to induce the wavy morphology of seminal roots in rice. Moreover, interactions between oxylipins and phytohormones such as ethylene and auxin participating in the NO-dependent regulatory pathway of light-induced wavy roots were examined. The order of action of signaling components in the pathway was NO, oxylipins, ethylene, and auxin.
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Affiliation(s)
- Hsiang-Wen Chen
- Department of Agronomy, National Taiwan University, No. 1, Section 4, Roosevelt Rd., Taipei, 10617, Taiwan
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Chen HW, Liang CH, Wu ZM, Chang EE, Lin TF, Chiang PC, Wang GS. Occurrence and assessment of treatment efficiency of nonylphenol, octylphenol and bisphenol-A in drinking water in Taiwan. Sci Total Environ 2013; 449:20-28. [PMID: 23403099 DOI: 10.1016/j.scitotenv.2013.01.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 01/10/2013] [Accepted: 01/10/2013] [Indexed: 06/01/2023]
Abstract
Occurrence and methods for the removal of nonylphenolic compounds in drinking water have been gaining increased attention due to their widespread presence in natural water and the potential health risks from the consumptions of drinking water. The purpose of this study was to assess the occurrence of nonylphenol (NP), octylphenol (OP), and bisphenol-A (BPA) in water sources and treated water in Taiwan, to evaluate the treatment efficiencies of these compounds in both the conventional (coagulation, sedimentation, filtration and chlorination) and advanced treatment processes. The treatment efficiencies of these chemicals were assessed based on their concentrations in water sources, and the results were verified with laboratory simulated treatment processes. A survey of NP, OP, and BPA in 11 Taiwanese water sources showed that all of them could be identified in most of the sampled sources, and that higher concentrations of NP were found when the raw water was contaminated by domestic wastewater. However, higher treatment efficiency could be observed when the NP concentration in water source is high. Laboratory simulation studies of conventional treatment processes showed that chlorination played an important role in the degradation of NP in raw water. Treatment efficiencies of 60%-90% were achieved for NP removal when sufficient chlorine dosages were applied to satisfy chlorine demands. However, results also showed that conventional coagulation and rapid filtration processes were less effective in the reduction of phenolic compounds in water.
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Affiliation(s)
- H W Chen
- Institute of Environmental Health, National Taiwan University, Taiwan
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Wang SJ, Chen HW, Yang RC. Pre-existent Hsp72 contributes to glutamine-induced hepatic hsp72 gene activation during heat shock recovery period in rat. Mol Nutr Food Res 2012; 56:410-6. [DOI: 10.1002/mnfr.201100555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 09/22/2011] [Accepted: 10/11/2011] [Indexed: 11/08/2022]
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Wang SJ, Kang CH, Chen HW. Effect of the interaction between light and touch stimuli on inducing curling seminal roots in rice seedlings. Plant Signal Behav 2011; 6:1434-5. [PMID: 21912213 PMCID: PMC3256363 DOI: 10.4161/psb.6.10.17087] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Accepted: 07/01/2011] [Indexed: 05/21/2023]
Abstract
Root development is sensitive to environmental stimuli. We have recently reported that the light signal could promote the helical growth of seminal roots and drive the wavy root morphology in rice (Oryza sativa L.) young seedlings. The light-stimulated wavy roots were mostly performed in indica-type rice varieties (e.g. Taichung Native 1; TCN1) but not in japonica rice (e.g. Tainung 67; TNG67). Here, we demonstrated that the light-driven circumutation trajectory of TCN1 seminal roots could be changed if the seedling roots were grown in the medium containing high concentration of Phytagel. The data showed the root morphology would be modulated from wavy to curling when the Phytagel concentration was increased to 2%. However, the touch-stimulated curling root phenotype could not be performed in dark. In addition, the touch-induced curling roots were not appeared in the TNG67 rice cultivar. Although touch stimuli could not induce wavy/curling root phenotype in dark, it could modify the light-promoted helical growth to conduct curling roots in TCN1 rice seedlings. Thus, it was suggested that there is a crosstalk mechanism between touching-induced root curling and light-stimulated root waving.
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Affiliation(s)
- Shu-Jen Wang
- Department of Agronomy, National Taiwan University, Taipei, Taiwan.
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Wang SJ, Ho CH, Chen HW. Rice develop wavy seminal roots in response to light stimulus. Plant Cell Rep 2011; 30:1747-58. [PMID: 21573806 DOI: 10.1007/s00299-011-1082-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 04/22/2011] [Accepted: 04/29/2011] [Indexed: 05/21/2023]
Abstract
Rice (Oryza sativa L.) seminal roots are the primary roots to emerge from germinated seeds. Here, we demonstrate that the photomorphology of the seminal roots was diverse among rice varieties, and the light-induced wavy roots were found mostly in indica-type rice varieties. The light-induced wavy morphology in rice seminal roots has been different with curling or coiling roots in some other specific conditions, such as high air humidity or high nitrogen nutrient. The efficiency of light-induced root waving was developmental stage dependent. The wavy root phenotype was caused by asymmetric cell growth around the stele. Using the inhibitors to block auxin polar transport and fatty acid oxygenation, the role of auxin and oxylipins in the morphogenesis of light-induced wavy roots was investigated. Expressions of genes encoded in the enzymes involved in fatty acid oxygenation in light-exposed roots were monitored by reverse transcriptase-polymerase chain reaction. Our results suggested that auxin polar transport was essential for inducing wavy seminal roots by light stimulus. In addition, the ketol oxylipins derived from allene oxide synthase (EC 4.2.1.92)-mediated fatty acid oxygenation function as intracellular signals for triggering the light-induced wavy root phenotype.
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Affiliation(s)
- Shu-Jen Wang
- Department of Agronomy, National Taiwan University, Taipei 106, Taiwan.
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Lin LC, Fann WC, Chou MH, Chen HW, Su YC, Chen JC. Urine specific gravity as a predictor of early neurological deterioration in acute ischemic stroke. Med Hypotheses 2011; 77:11-4. [PMID: 21444157 DOI: 10.1016/j.mehy.2011.03.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [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: 02/01/2011] [Accepted: 03/07/2011] [Indexed: 11/18/2022]
Abstract
We previously found that a blood urea nitrogen/creatinine (BUN/Cr) ratio>15 is an independent predictor of early neurological deterioration after acute ischemic stroke, which suggests that dehydration may be a cause of early deterioration. The aim of this study was to determine whether urine specific gravity, which is another indicator of hydration status and one that is more easily obtained, is also an independent predictor of early deterioration or stroke-in-evolution (SIE). Demographic and clinical data were recorded at admission from patients with acute ischemic stroke who were prospectively enrolled from October 2007 to June 2010. We compared patients with and without stroke-in-evolution (based on an increase of 3 points or more points on the National Institutes of Health Stroke Scale within 3 days). Univariate and multivariate statistical analyses were carried out. A total of 317 patients (43 SIE and 274 non-SIE) were enrolled; the first 196 patients comprised the cohort of our previous study. The only two independent predictors of early deterioration or SIE were BUN/Cr>15 and urine specific gravity>1.010. After adjusting for age and gender, patients with a urine specific gravity>1.010 were 2.78 times more likely to develop SIE (95% CI=1.11-6.96; P=0.030). Urine specific gravity may be useful as an early predictor of early deterioration in patients with acute ischemic stroke. Patients with urine specific gravity ≤ 1.010 therefore may have a reduced likelihood of early neurological deterioration.
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Affiliation(s)
- L C Lin
- Department of Emergency Medicine, Chang Gung Memorial Hospital, Chiayi, Chang Gung University College of Medicine, Taiwan, ROC
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Fang CK, Li PY, Lai ML, Lin MH, Bridge DT, Chen HW. Establishing a 'Physician's Spiritual Well-being Scale' and testing its reliability and validity. J Med Ethics 2011; 37:6-12. [PMID: 21059633 DOI: 10.1136/jme.2010.037200] [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: 05/30/2023]
Abstract
The purpose of this study was to develop a Physician's Spiritual Well-Being Scale (PSpWBS). The significance of a physician's spiritual well-being was explored through in-depth interviews with and qualitative data collection from focus groups. Based on the results of qualitative analysis and related literature, the PSpWBS consisting of 25 questions was established. Reliability and validity tests were performed on 177 subjects. Four domains of the PSpWBS were devised: physician's characteristics; medical practice challenges; response to changes; and overall well-being. The explainable total variance was 65.65%. Cronbach α was 0.864 when the internal consistency of the whole scale was calculated. Factor analysis showed that the internal consistency Cronbach α value for each factor was between 0.625 and 0.794 and the split-half reliability was 0.865. The scale has satisfactory reliability and validity and could serve as the basis for assessment of the spiritual well-being of a physician.
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Affiliation(s)
- C K Fang
- Department of Psychiatry, Mackay Memorial Hospital, Taipei, Taiwan
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Chen HW, Lai ECH, Zhen ZJ, Cui WZ, Liao S, Lau WY. Ultrasound-guided percutaneous cryotherapy of hepatocellular carcinoma. Int J Surg 2010; 9:188-91. [PMID: 21093616 DOI: 10.1016/j.ijsu.2010.11.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 11/08/2010] [Indexed: 02/06/2023]
Abstract
BACKGROUND Reports on percutaneous cryoablation to treat patients with HCC are sparse in the medical literature. This study aimed to determine the safety and efficacy of percutaneous cryotherapy for unresectable or recurrent hepatocellular carcinoma (HCC). METHODS The results of 40 patients with unresectable HCC and 26 patients with recurrent HCC treated with ultrasound-guided percutaneous cryotherapy from January 2006 to June 2009 were retrospectively analyzed. RESULTS We used percutaneous cryotherapy to treat 76 tumors in 40 patients with unresectable and 76 tumors in 26 patients with recurrent HCC. The size of the tumors was 2.8 ± 1.7 cm (mean ± S.D.). The mean number of treatment sessions for unresectable and recurrent HCC were 1.7 and 1.4, respectively. All cryotherapy procedures were technically successful. No procedure-related death was observed. The overall complication rate was 12.1%. Patients with unresectable HCC had 1-, and 3-year overall survival rates of 81.4%, and 60.3%, while the disease-free survival rates at 1 year and 3 years were 67.6% and 20.8%, respectively. Patients with recurrent HCC had 1-, and 3-year overall survival rates of 70.2%, and 28.8%, while the disease-free survival rates at 1 year and 3 years were 53.8% and 7.7%, respectively. CONCLUSION Ultrasound-guided percutaneous cryotherapy was safe and efficacious in the treatment of unresectable and recurrent HCC. Further randomized trials are needed to compare the safety and efficacy of cryotherapy with other forms of percutaneous treatment so that an unbiased therapeutic strategy can be devised.
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Affiliation(s)
- H W Chen
- Department of Hepatobiliary Surgery, The First People's Hospital of Foshan, Foshan, 528000 Guang Dong, People's Republic of China.
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Abstract
Avian coronavirus infectious bronchitis virus (IBV) poses a major threat to the global poultry industry. New IBV geno- and serotypes are continually reported. However, information on IBV prevalence is not frequently addressed in these reports. This study reports on a viral surveillance program in Taiwan from 2005 to 2006 with sampling conducted in poultry slaughterhouses. The genetic features of the obtained field isolates were investigated using sequence analysis and SimPlot analysis. A 1-directional neutralization test was performed to examine the antigenic variations among the collected viruses. The selection pressures that may contribute to the evolution of Taiwan IBV during recent decades were assessed. The surveillance program revealed that 8 out of 47 flocks (17%) were IBV-infected, from which 13 IBV isolates were recovered. Based on the phylogenetic analysis of the S1 gene, 11 of 13 isolates (84.6%) clustered with Taiwan group I. One IBV isolate showed evidence of frequent recombination events with China-like IBV in the spike glycoprotein (S) gene. Another isolate demonstrated the incorporation of China-like and H120-like genome fragments within the S2 gene and the membrane protein (M) gene region, respectively. Some antigenic changes were found in the 1-directional neutralization test. However, no positive selection pressures were related to those variations in the S1 genes among Taiwan IBV. Based on our work, we suggest that sampling chickens in poultry slaughterhouses is an effective and valuable means of compiling viral prevalence data, particularly in situations where there is subclinical infection. Infectious bronchitis viruses from slaughtered chickens revealed intertypic genetic recombination and antigenic diversity.
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Affiliation(s)
- H W Chen
- School of Veterinary Medicine, National Taiwan University, Taipei 10617, Taiwan
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Hu TH, Whang LM, Lei CN, Chen CF, Chiang TY, Lin LB, Chen HW, Liu PWG, Cheng SS. Evaluation of methanogenic treatment of TMAH (tetra-methyl ammonium hydroxide) in a full-scale TFT-LCD wastewater treatment process. Water Sci Technol 2010; 62:403-409. [PMID: 20651446 DOI: 10.2166/wst.2010.284] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study evaluated TMAH biodegradation under methanogenic conditions. Under methanogenic conditions, a sludge from a full-scale UASB treating TFT-LCD wastewater was able to degrade 2,000 mg/L of TMAH within 10 h and attained a specific degradation rate of 19.2 mgTMAH/gVSS-h. Furthermore, several chemicals including some surfactants, DMSO, and sulfate were examined for their potential inhibitory effects on TMAH biodegradation under methanogenic conditions. The results indicated that surfactant S1 (up to 2%) and DMSO (up to 1,000 mg/L) presented negligible inhibitory effects on TMAH degradation, while surfactant S2 (0.2-1%) might inhibit methanogenic reaction without any TMAH degradation for 3-5 h. At sulfate concentrations higher than 300 mg/L, a complete inhibition of methanogenic reaction and TMAH biodegradation was observed. Results from cloning and sequencing of archaeal 16S rRNA gene fragments showed that Methanosarcina barkeri and Methanosarcina mazei were the dominant methanogens in the UASB treating TMAH-containing TFT-LCD wastewater.
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Affiliation(s)
- T H Hu
- Department of Environmental Engineering, National Cheng Kung University, 1 University Road, Tainan City 701, Chinese Taiwan.
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Chiang JM, Chen HW, Tang RP, Chen JS, Changchien CR, Hsieh PS, Wang JY. Mutation analysis of the APC gene in Taiwanese FAP families: low incidence of APC germline mutation in a distinct subgroup of FAP families. Fam Cancer 2009; 9:117-24. [PMID: 19768578 DOI: 10.1007/s10689-009-9292-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2008] [Accepted: 08/29/2009] [Indexed: 12/24/2022]
Abstract
Familial adenomatous polyposis (FAP) is an autosomal-dominant disease caused by germline mutations in the adenomatous polyposis coli (APC) gene. The affected individuals develop colorectal polyposis and show various extra-colonic manifestations. In this study, we aimed to investigate the genetic and clinical characteristics of FAP in Taiwanese families and analyze the genotype-phenotype correlations. Blood samples were obtained from 66 FAP patients registered in the hereditary colorectal cancer database. Then, germline mutations in the APC genes of these 66 polyposis patients from 47 unrelated FAP families were analyzed. The germline-mutation-negative cases were analyzed by performing multiplex ligation-dependent probe amplification (MLPA) and single-strand conformation polymorphism (SSCP) analysis of the MUTYH gene. Among the analyzed families, 79% (37/47) of the families showed 28 APC mutations, including 19 frameshift mutations, 4 nonsense mutations, 3 genomic deletion mutations, 1 missense mutation, and 1 splice-site mutation. In addition, we identified 15 novel mutations in 32% (15/47) of the families. The cases in which APC mutations were not identified showed significantly lower incidence of profuse polyposis (P = 0.034) and gastroduodenal polyps (P = 0.027). Furthermore, FAP families in which some affected individuals had less than 100 polyps showed significant association with low incidence of APC germline mutations (P = 0.002). We have added the APC germline-mutation data for Taiwanese FAP patients and indicated the presence of an FAP subgroup comprising affected individuals with nonadenomatous polyps or less than 100 adenomatous polyps; this form of FAP is less frequently caused by germline mutations of the APC gene.
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Affiliation(s)
- J M Chiang
- Division of Colon and Rectal Surgery, Chang Gung Memorial Hospital, Lin-kou, Taiwan.
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Chen HW, Lai ECH, Pan AZ, Chen T, Liao S, Lau WY. Preoperative assessment and staging of hilar cholangiocarcinoma with 16-multidetector computed tomography cholangiography and angiography. Hepatogastroenterology 2009; 56:578-583. [PMID: 19621658] [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: 05/28/2023]
Abstract
BACKGROUND/AIMS To evaluate prospectively the preoperative use of 16-multidetector computed tomography (MDCT) with cholangiography and angiography in determining the resectability of hilar cholangiocarcinoma. METHODOLOGY From January 2002 to January 2008, 75 consecutive patients with hilar cholangiocarcinoma underwent preoperative MDCT with cholangiography and angiography. 3D images of the portal vein, hepatic artery, and bile ducts were created and viewed simultaneously. The accuracy of MDCT with cholangiography and angiography was determined by comparison with intraoperative and pathologic findings. RESULTS All patients tolerated the CT imaging well and without serious complication. The sensitivity, specificity, and accuracy rates were 92.9%, 100%, and 96% for portal vein invasion and 83.3%, 100%, and 93.3% for hepatic arterial invasion. The accuracy rate of longitudinal tumor extension, using the modified Bismuth-Corlette classification, was 96%. The sensitivity, specificity, and accuracy of prediction of resectability were 95.7%, 82.1%, and 90.7%, respectively. CONCLUSIONS Preoperative MDCT with cholangiography and angiography gave a good assessment of the degree of biliary and vascular involvement of hilar cholangiocarcinoma. It also accurately predicted resectability.
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Affiliation(s)
- H W Chen
- Department of Hepatobiliary Surgery, The First People's Hospital of Fo Shan, Fo Shan 528000, Guang Dong, China
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Kuo HT, Lee JJ, Hsiao HH, Chen HW, Chen HC. N-acetylcysteine prevents mitochondria from oxidative injury induced by conventional peritoneal dialysate in human peritoneal mesothelial cells. Am J Nephrol 2009; 30:179-85. [PMID: 19372642 DOI: 10.1159/000213502] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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: 12/27/2008] [Accepted: 03/12/2009] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Bioincompatible peritoneal dialysate fluids (PDFs) may lead to peritoneal injury. The present study investigated the possible effects of N-acetylcysteine (NAC) during conventional PDF exposure for human peritoneal mesothelial cells (HPMCs). METHODS Cultured HPMCs were incubated with conventional 1.5% dextrose PDF for different time periods, and NAC was utilized as the antioxidant. The cell survival, superoxide accumulation, mitochondrial membrane potential (Deltapsim), expression of heat shock protein 72(HSP72), catalase, superoxide dismutase (SOD), and glutathione content of HPMCs were evaluated. RESULTS HPMC exposed to PDF resulted in a significant decrease in cell survival in a time-dependent manner, which was reversed by NAC. PDF exposure resulted in intracellular accumulation of superoxide in a time-dependent manner, with collapse of Deltapsim as well. The activity of enzymatic antioxidant, SOD and catalase remained the same in all groups. However, the reduced glutathione was significantly suppressed after PDF exposure. NAC treatment preserved the content of intracellular reduced glutathione, and also attenuated the PDF-induced superoxide accumulation and Deltapsim collapse. Moreover, the enhanced expression of HSP72 induced by PDF exposure was also reversed by NAC. CONCLUSION Depletion of a nonenzymatic antioxidant, i.e. reduced glutathione, in HPMC is a crucial cause of PDF-induced oxidative stress. NAC protects HPMCs from PDF-induced cellular damage by preserving the reduced glutathione.
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Affiliation(s)
- Hung-Tien Kuo
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
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Kuo HT, Chen HW, Hsiao HH, Chen HC. Heat shock response protects human peritoneal mesothelial cells from dialysate-induced oxidative stress and mitochondrial injury. Nephrol Dial Transplant 2009; 24:1799-809. [PMID: 19126751 DOI: 10.1093/ndt/gfn718] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Chronic peritoneal dialysis (PD) is one of the major therapies for uremic patients. However, the peritoneal mesothelial cells (PMCs) are subject to the injury by bioincompatible dialysates. The aim of this study is to investigate the protective roles and mechanisms of heat shock response in PMCs. METHODS Primary cultured human PMCs (HPMCs) were subjected to commercial peritoneal dialysates. The cell viability was assayed by MTT test and Annexin V assay. The expression of HSPs was detected by Western blots analysis. Intracellular hydrogen peroxide and superoxide anion were detected using H(2)DCFDA and dHE probe, respectively, with flow cytometry. The mitochondrial membrane potential (DeltaPsim) of HPMCs was evaluated using JC1 probe with flow-cytometry. RESULTS Exposure of HPMCs to 1.5%, 2.5%, and 4.25% dextrose, and 7.5% icodextrin dialysates, respectively, for 60 min resulted in significantly accumulation of intracellular reactive oxygen species (ROS), DeltaPsim loss, and cell death in HPMCs. Amino acid dialysates exhibited no significant cytotoxicity. Adjusting the acidity in 1.5% dextrose and icodextrin dialysate significantly attenuated the dialysate-induced ROS generation and cell death in HPMCs. Heat pretreatment (41 degrees C, 30 minutes), which induced HSP 27 and 72 syntheses, significantly attenuated the dialysate-induced intracellular ROS accumulation, Dym loss, and cell death in HPMCs. CONCLUSIONS In conclusion, the acidic bioincompatible dialysates induce oxidative stress, DeltaPsim loss, and subsequent cell death in HPMCs. Amino acid dialysates is more biocompatible than glucose and icodextrin dialysates to HPMCs. Heat shock response protects HPMCs from the bioincompatible dialysates-induced cellular damage.
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Affiliation(s)
- Hung-Tien Kuo
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Faculty of Renal Care, Kaohsiung Medical University, Kaohsiung, Taiwan
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Abstract
The present study was designed to investigate the proteomic alteration of hepatic mitochondria during sepsis and to explore the possible effects induced by heat shock treatment. Sepsis was induced by cecal ligation and puncture in Sprague-Dawley rats. Liver mitochondrial proteins were isolated and evaluated by 2-dimensional electrophoresis with broad pH-ranged (pH 3 - 10) immobile DryStrip and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The protein spots were visualized with silver stain and analyzed by Bio-2D software. Results showed that around 120 dominant spots could be separated and visualized distinctly by 2-dimensional electrophoresis analysis. Among them, three spots with the same molecular weight (56.4 kd), mitochondrial protein 1 (MP1), MP2, and MP3, were significantly altered in septic specimens. When analyzed by liquid chromatography-tandem mass spectrometry, the three spots all revealed to be an identical enzyme: aldehyde dehydrogenase 2 (ALDH2, EC 1.2.1.3). During sepsis, MP1 and MP2 were downregulated, whereas MP3 was upregulated concomitantly. Interestingly, heat shock treatment could reverse this phenomenon. Phosphoprotein staining showed that the degree of phosphorylation is higher in MP1 and MP2 than that in MP3. The enzyme activity assay showed that ALDH2 activity was downregulated in nonheated septic rats of 18 h after cecal ligation and puncture operation, and preserved in heated septic rats. The results of this study suggest that posttranslation modification, highly possible the phosphorylation, in ALDH2 may play a functional role in the pathogenesis of sepsis and provide a novel protective mechanism of heat shock treatment.
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Affiliation(s)
- Hsiang-Wen Chen
- Department of Microbiology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City, Taiwan
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Wang SJ, Chen HW, Huang MH, Yang RC. Previous heat shock facilitates the glutamine-induced expression of heat-shock protein 72 in septic liver. Nutrition 2007; 23:582-8. [PMID: 17616344 DOI: 10.1016/j.nut.2007.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [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: 01/09/2007] [Revised: 04/20/2007] [Accepted: 04/27/2007] [Indexed: 11/19/2022]
Abstract
OBJECTIVES This study investigated the effects of glutamine administration on the expression of the heat-shock protein 72 (Hsp72) in the liver during sepsis. The role of heat-shock factor 1 (HSF-1) was analyzed for possible mechanisms to the phenomenon. METHODS Male Sprague-Dawley rats were subjected to sepsis by cecal ligation and puncture (CLP). Heat-shock treatment was applied to the rats' whole body using an electric heating pad 24 h before CLP. Glutamine or saline was administered 1 h after initiation of sepsis by tail vein injection. The Hsp72 and HSF-1 expressions were detected using western blot analysis, and Hsp72 mRNA expression was measured using reverse transcription-polymerase chain reaction. RESULTS The Hsp72 content noticeably increased in the livers of preheated rats supplied by glutamine 1 h after sepsis. However, no further synthesis of Hsp72 was found in septic livers or sham glutamine-treated livers. Hsp72, which was induced by preheating, decreased with time, whereas a large amount of Hsp72 could be detected by glutamine administration. Reverse transcription-polymerase chain reaction data indicated that Hsp72 mRNA could be detected only in the group treated with preheating and glutamine administration. The translocation of HSF-1 occurred significantly during sepsis in preheated and non-preheated rats. However, only the preheated group showed the phosphorylation in HSF-1. With the administration of glutamine, the nuclear accumulation of phosphorylated HSF-1 was observed to decline significantly 9 and 18 h after CLP when the Hsp72 mRNA became detectable. CONCLUSIONS These results demonstrated that Hsp72 could be induced by glutamine in septic liver only if the liver was preconditioned by heat-shock response. The selective facilitating effect might depend on the accumulation of intranuclear phosphorylated HSF-1 caused by previous heat-shock treatment.
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Affiliation(s)
- Shu-Jung Wang
- Department of Physiology, Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan
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Liu CS, Chen CH, Chiang HC, Kuo CL, Huang CS, Cheng WL, Wei YH, Chen HW. B-group vitamins, MTHFR C677T polymorphism and carotid intima-media thickness in clinically healthy subjects. Eur J Clin Nutr 2007; 61:996-1003. [PMID: 17228344 DOI: 10.1038/sj.ejcn.1602606] [Citation(s) in RCA: 13] [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: 11/09/2022]
Abstract
OBJECTIVE Plasma B-group vitamins and age may affect the carotid intima-media thickness (IMT) in subjects with different 677TT genotype of the methylenetetrahydrofolate reductase (MTHFR) gene. DESIGN A hospital-based cross-study. SETTING Genomic and Vascular Center, Changhua Christian Hospital, Changhua, Taiwan. SUBJECTS Five hundred and forty-one clinically healthy subjects. INTERVENTION Fasting plasma, homocysteine (Hcy), vitamin B(6), vitamin B(12), folate and B-mode carotid ultrasound. RESULTS MTHFR genotype, plasma concentrations of folate, vitamin B(6) and vitamin B(12) and age were significantly correlated to the plasma Hcy concentration. MTHFR 677TT carriers had higher concentrations of Hcy than did subjects with the CC and CT genotypes. Age, sex, body mass index and plasma Hcy were independent contributors to increase carotid IMT. However, with stratification by mean value of age and B-group vitamins concentrations, we found that at advanced age, lower plasma folate and vitamin B(12) were three risk factors involved in the enhancing effect of the MTHFR 677TT genotype on the increase of plasma Hcy and carotid IMT. CONCLUSION MTHFR 677TT-related carotid atherosclerosis was only identified in healthy elderly subjects with lower level of plasma folate and vitamin B(12). SPONSORSHIP Changhua Christian Hospital.
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Affiliation(s)
- C S Liu
- Department of Neurology, Chung Shan Medical University Hospital, Taichung, Taiwan.
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Abstract
The clinical diagnosis of Q fever is difficult. Whole cell antigens are currently used in several serological methods, but antigens are limited due to the hazardous nature of Coxiella burnetii cultivation. In this report, we described the method of detecting immunodominant antigens of C. burnetii by using proteomic techniques with patient sera, and cloning and expressing the selected antigens using a novel vector known for its ease of expression, purification, and downstream application.
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Affiliation(s)
- C C Chao
- Rickettsial Disease Department, Naval Medical Research Center, Silver Spring, MD 20910, USA.
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Chen HW, Pan AZ, Zhen ZJ, Su SY, Wang JH, Yu SCH, Lau WY. Preoperative Evaluation of Resectability of Klatskin Tumor with 16-MDCT Angiography and Cholangiography. AJR Am J Roentgenol 2006; 186:1580-6. [PMID: 16714646 DOI: 10.2214/ajr.05.0008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [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: 11/18/2022]
Abstract
OBJECTIVE The objective of our study was to evaluate prospectively the preoperative use of 16-MDCT angiography and cholangiography in determining the resectability of Klatskin tumors. CONCLUSION Preoperative MDCT angiography and cholangiography gave a good assessment of the degree of vascular and biliary involvement of the Klatskin tumor.
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Affiliation(s)
- H W Chen
- Department of Hepatobiliary Surgery, The First People's Hospital of Fo Shan, Fo Shan 528000, Guang Dong, People's Republic of China.
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Abstract
This study evaluated the UV/H2O2 system for degradation of natural organic matter in water. The photolysis experiments were conducted in a 10-l batch reactor using a 450-watt high-pressure mercury vapor lamp as the light source. The addition of H2O2 in water greatly improved the rate of humic acid degradation by UV light and 90% of the humic acid was removed within 30 min of photolysis. Kinetic data showed that the first-order reaction could be used to describe the kinetics of both humic acid oxidation and H2O2 decomposition, and the optimum H2O2 dose was 0.01%-0.05% for humic acid oxidation. It was also observed that the absorption of UVC (UV with wavelength between 200 and 280 nm) is responsible for the dissociation of H2O2 to generate the reactive hydroxyl radicals. Depending on the initial dosages, the H2O2 added to the system can be completely decomposed by UV within 50 to 90 minutes. Upon UV irradiation, the humic intermediates with smaller molecular sizes increase as a result of the degradation of larger humic substances. Photolysis of surface water also shows that the UV/H2O2 was effective in reducing trihalomethanes (THMs) formation in treating surface water with high contents of organic precursors. The distribution of THMs shifted from chlorine-THMs to bromine-THMs after UV/H2O2 treatments when bromide was present in water. However, higher H2O2 dosages would be necessary for the photolysis of surface water containing high concentrations of organic THM precursors. As observed from the Fourier transform infrared (FTIR) spectra, the functional groups of treated humic acids were destructed significantly, including -OH (from -COOH and -COH), aromatic -C=C, and -C=O conjugated with aromatic rings.
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Affiliation(s)
- G S Wang
- Department of Public Health, National Taiwan University, Taipei
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Liu HL, Chen HW, Ju KC, Shih TC, Chen WS. Heating efficiency improvement by using a spherically-concaved sectored array in focused ultrasound thermal therapy. Conf Proc IEEE Eng Med Biol Soc 2006; 2006:3807-3810. [PMID: 17945801 DOI: 10.1109/iembs.2006.259317] [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: 05/25/2023]
Abstract
Focus splitting by using sector-sectioned phased arrays is one of effective methods to increase the necrosed volume in single sonication and to reduce the total treatment time in large tumor treatment. However, the split focus contains less concentrated energy and severer focal beam distortion, which limits its usefulness in practical treatments. In this study, we proposed a new heating strategy by combining sonications of strongly-focused and split-focused patterns to increase the heating efficiency. Theoretical predictions and ex-vivo tissue experiments showed that thermal lesions can be enlarged in dimensions after applying the proposed strategy. This may provide a useful way to solve current obstacles in low heating efficiency of split-focus sonications that attempted to shorten the total treatment time in current clinical application.
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Affiliation(s)
- H L Liu
- Dept. of Electr. Eng., Nat. Taiwan Univ., Taoyuan.
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45
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Abstract
Several studies demonstrated that previous heat shock treatment caused expression of heat shock proteins (HSPs) and reduced organ dysfunction and mortality in experimentally induced severe sepsis. However, the protective mechanism on platelet function remains unclear. The aim of this study was to investigate the effect of heat shock treatment on platelet aggregation ex vivo in endotoxin-induced rats with sepsis. Rats of the heated group were heated by whole-body hyperthermia 18 h before lipopolysaccharide (LPS) injection. Blood samples were obtained from the carotid artery 90 min after LPS injection. Platelet aggregation ability was measured by aggregometer. Results revealed that platelet aggregation ex vivo was significantly inhibited in LPS-induced rats in a manner of dose dependence. Previous heat shock treatment caused overexpression of HSPs and significantly attenuated the LPS-induced platelet hyporesponsiveness. This attenuation disappeared in accordance with absence of HSP72 at 7 days after heat shock treatment. Aggregation of normal platelets was also inhibited by incubating with plasma obtained from endotoxemic rats but not from preheated endotoxemic rats. Furthermore, no significant hyporesponsiveness was found in endotoxemic platelets in addition to preheated endotoxemic plasma. The addition of H2O2 scavenger catalase diminished the platelet hyporesponsiveness significantly only in nonheated endotoxemic rats. Moreover, the plasma nitrite and nitrate levels were significantly attenuated in preheated endotoxemic rats. These results revealed that previous heat shock treatment might attenuate LPS-induced hyporesponsiveness of platelets by changing the plasma components possibly through altering H2O2 and nitric oxide concentrations.
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Affiliation(s)
- Huei-Ping Dong
- Department of Physiology, Kaohsiung Medical University, Kaohsiung City, Taiwan
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46
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Abstract
This study elucidates the mechanism through which heat shock treatment influences the outcome of sepsis. Post-heat shock sepsis was induced in rats by CLP 24 h after whole-body hyperthermia. Liver cytosolic and nuclear fractions were collected and analyzed in early and late sepsis rats (sacrificed 9 and 18 h after CLP, respectively). During sepsis, levels of I-kappaB and nuclear factor-kappaB (NF-kappaB) declined in the cytosol of liver, whereas NF-kappaB increased in nucleus. NF-kappaB activity was significantly enhanced during sepsis, and the products of NF-kappaB target genes, such as TNF-alpha and inducible nitric oxide synthase (iNOS), were overexpressed. Heat shock treatment, inducing heat shock protein synthesis, prevented down-regulation of cytosolic I-kappaB and decreased translocation of NF-kappaB into the nucleus. Therefore, the sepsis-induced acceleration of NF-kappaB activation was inhibited. Expression of TNF-alpha and iNOS mRNA was also down-regulated. Coimmunoprecipitation with anti-NF-kappaB (p65) and anti-IkappaB antibodies verified an assembling phenomenon of heat shock protein (HSP) 72 with NF-kappaB and I-kappaB. We suggest that the mechanism preventing septic activation of NF-kappaB is that oversynthesized HSP72 forms a complex with NF-kappaB/I-kappaB, thus inhibiting nuclear translocation of NF-kappaB. HSP72 appears to play a crucial protective role in modulating the gene expression controlled by NF-kappaB in sepsis.
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Affiliation(s)
- Hsiang-Wen Chen
- Department of Microbiology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan
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Abstract
The pathophysiology of febrile convulsion, the most common childhood neurologic disease, remains unclear. In this study, we investigated what role a heat shock protein plays in this disease. We enrolled eight boys and two girls with febrile convulsion and 10 age-matched healthy controls. We did a biosynthetic evaluation of both groups by separating lymphocytes and measuring the expression of heat shock protein 72 before and after heat shock treatment. Before the treatment, both groups were found to have small amounts of constitutive heat shock protein 72. Afterwards, its expression increased in both groups, and no statistical difference was found between the increases in the two groups. In addition, there was no obvious difference in the susceptibility to produce heat shock proteins. However, the febrile convulsion group was found to have a significant decrease in phosphorylation of heat shock protein 72. These results suggest the possible involvement of post-translational modification of heat shock proteins, most likely phosphorylation, in the pathogenesis of febrile convulsion.
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Affiliation(s)
- Lung-Chang Lin
- Department of Pediatrics, Kaohsiung Municipal Hsiao Kang Hospital, Taiwan
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Lu TS, Chen HW, Huang MH, Wang SJ, Yang RC. Heat shock treatment protects osmotic stress-induced dysfunction of the blood-brain barrier through preservation of tight junction proteins. Cell Stress Chaperones 2005; 9:369-77. [PMID: 15633295 PMCID: PMC1065276 DOI: 10.1379/csc-45r1.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [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: 11/24/2022] Open
Abstract
The blood-brain barrier (BBB) is a specialized structure in the central nervous system (CNS), which participates in maintenance of a state of cerebrospinal fluid homeostasis. The endothelial cells of the cerebral capillaries and the tight junctions between them form the basis of the BBB. Research has shown that destruction of the BBB is associated with diseases of the CNS. However, there is little research on how the BBB might be protected. In this study, we used a high osmotic solution (1.6 M D-mannitol) to open the BBB of rats and Evans blue dye as a macromolecular marker. The effect of heat shock treatment was evaluated. The results show that increased synthesis of heat shock protein 72 (Hsp72) was induced in the heated group only. BBB permeability was significantly less in the heat shock-treated group after hyperosmotic shock. The major tight junction proteins, occludin and zonula occludens (ZO)-1, were significantly decreased after D-mannitol treatment in the nonheated group, whereas they were preserved in the heated group. The coimmunoprecipitation studies demonstrated that Hsp72 could be detected in the precipitates of brain extract interacting with anti-ZO-1 antibodies as well as those interacting with anti-occludin antibodies in the heated group. We conclude that the integrity of tight junctions could be maintained by previous heat shock treatment, which might be associated with the increased production of Hsp72.
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Affiliation(s)
- Tzong-Shi Lu
- Department of Physiology, Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung City 807, Taiwan, Republic of China
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49
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Affiliation(s)
- H W Chen
- Department of Environmental Engineering and Health, Yuanpei University of Science and Technology, 306 Yuanpei Street, Hsinchu 300, Taiwan, Republic of China
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50
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Abstract
Liver function failure is one of the characteristics of critically ill, septic patients and is associated with worse outcome. Our previous studies have demonstrated that heat-shock response protects cells and tissue from subsequent insults and improves survival during sepsis. In this study, we have shown that mitochondrial cytochrome c oxidase (CCO) is one of the major sources of that protective effect. Experimental sepsis was induced by the cecal ligation and puncture (CLP) method. Heat-shock treatment was induced in rats by hyperthermia 24 h before CLP operation. The results showed that ATP content of the liver declined significantly, and the enzymatic activity of mitochondrial CCO was apparently suppressed during the late stages of sepsis. The mitochondrial ultrastructure of septic liver showed the deformity, mild swelling and inner membrane budding. Heat-shock treatment led to heat-shock protein 72 overexpression and prevented the downregulation of Grp75 during sepsis. On the contrary, the expression of the enzyme complex and its activity were preserved, associated with the minimization of ultrastructural deformities. In conclusion, the maintenance of mitochondrial function, especially the CCO, may be an important strategy in therapeutic interventions of a septic liver.
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Affiliation(s)
- Hsiang-Wen Chen
- Department of Microbiology, School of Medicine, Kaohsiung Medical UniversityKaohsiung City, Taiwan
| | - Hung-Tien Kuo
- Department of Internal medicine, School of Medicine, Kaohsiung Medical UniversityKaohsiung City, Taiwan
| | - Tzong-Shi Lu
- Department of Physiology, School of Medicine, Kaohsiung Medical UniversityKaohsiung City, Taiwan
| | - Shu-Jung Wang
- Department of Physiology, School of Medicine, Kaohsiung Medical UniversityKaohsiung City, Taiwan
| | - Rei-Cheng Yang
- Department of Physiology, School of Medicine, Kaohsiung Medical UniversityKaohsiung City, Taiwan
- Department of Pediatrics, School of Medicine, Kaohsiung Medical UniversityKaohsiung City, Taiwan
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