1
|
Chen KJ. [My favorite memory with the Chinese Journal of Cardiology]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:215-216. [PMID: 36925133 DOI: 10.3760/cma.j.cn112148-20230112-00027] [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: 03/18/2023]
Affiliation(s)
- K J Chen
- National Clinical Medical Research Center for Cardiovascular Diseases of Traditional Chinese Medicine, Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine, Beijing 100091, China
| |
Collapse
|
2
|
Chen KJ, Huang YL, Kuo LM, Chen YT, Hung CF, Hsieh PW. Protective role of casuarinin from Melastoma malabathricum against a mouse model of 5-fluorouracil-induced intestinal mucositis: Impact on inflammation and gut microbiota dysbiosis. Phytomedicine 2022; 101:154092. [PMID: 35430483 DOI: 10.1016/j.phymed.2022.154092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 10/08/2021] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND 5-FU-induced intestinal mucositis (FUIIM) is a common gastrointestinal side effect of chemotherapy, leading to gastric pain in clinical cancer patients. In a previous study, we demonstrated that neutrophil elastase (NE) inhibitors could alleviate FUIIM and manipulate the homeostasis of the gut microbiota. The root of Melastoma malabathricum, also called Ye-Mu-Dan, has been used as a traditional Chinese medicine for gastrointestinal disease. Water extract of the roots of M. malabathricum exhibits an inhibitory effect on NE, with an IC50 value of 9.13 μg/ml. PURPOSE In this study, we aimed to isolate an anti-NE compound from the root of M. malabathricum and to determine the protective effect of the bioactive component on a mouse model of FUIIM with respect to tissue damage, inflammation, intestinal barrier dysfunction, and gut microbiota dysbiosis. METHODS A water extract of the roots of M. malabathricum was prepared and its major bioactive compound, was identified using bioactivity-guided fractionation. The effects of samples on the inhibition of NE activity were evaluated using enzymatic assays. To evaluate the effects of the bioactive compound in an FUIIM animal model, male C57BL/6 mice treated with or without casuarinin (50 and 100 mg/kg/day, p.o.), and then received of 5-fluorouracil (50 mg/kg/day) intraperitoneally for 5 days to induce FUIIM. Histopathological staining was used to monitor the tissue damage, proliferation of intestinal crypts, and expression of tight junction proteins. The inflammation score was estimated by determining the levels of oxidative stress, neutrophil-related proteases, and proinflammatory cytokines in tissue and serum. The ecology of the gut microbiota was evaluated using 16S rRNA gene sequencing. RESULTS Casuarinin had the most potent and selective effect against NE, with an IC50 value of 2.79 ± 0.07 μM. Casuarinin (100 mg/kg/day, p.o.) significantly improved 5-FU-induced body weight loss together with food intake reduction, and it also significantly reversed villus atrophy, restored the proliferative activity of the intestinal crypts, and suppressed inflammation and intestinal barrier dysfunction in the mouse model of FUIIM. Casuarinin also reversed 5-FU-induced gut microbiota dysbiosis, particularly the abundance of Actinobacteria, Candidatus Arthromitus, and Lactobacillus murinus, and the Firmicutes-to-Bacteroidetes ratio. CONCLUSION This study firstly showed that casuarinin isolated from the root part of M. malabathricum could be used as a NE inhibitor, whereas it could improve FUIIM by modulating inflammation, intestinal barrier dysfunction, and gut microbiota dysbiosis. In summary, exploring anti-NE natural product may provide a way to find candidate for improvement of FUIIM.
Collapse
Affiliation(s)
- Kung-Ju Chen
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan
| | - Yu-Ling Huang
- Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan
| | - Liang-Mou Kuo
- Department of General Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
| | - Yi-Ting Chen
- Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan
| | - Chi-Feng Hung
- School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan; Program in Pharmaceutical Biotechnology, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Pei-Wen Hsieh
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan; Department of General Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan; Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Taoyuan, Taiwan.
| |
Collapse
|
3
|
Chen YQ, Chen KJ, Lyu Y, Yang ZQ, Jiang WZ, Liu YM. [Analysis of 1 case of convulsion death caused by large dose of diquat poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2022; 40:75-77. [PMID: 35255570 DOI: 10.3760/cma.j.cn121094-20201119-00636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A retrospective analysis of a case of death from sudden convulsions caused by oral high-dose diquat was conducted, and the mechanism and treatment of central damage caused by diquat were investigated to lay the foundation for increasing the success rate of treatment of high-dose diquat poisoning. At the same time, at the same time, our clinical treatment experience has also been accumulated.
Collapse
Affiliation(s)
- Y Q Chen
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Guangzhou 510620, China
| | - K J Chen
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - Y Lyu
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou 510000, China
| | - Z Q Yang
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Guangzhou 510620, China
| | - W Z Jiang
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Guangzhou 510620, China
| | - Y M Liu
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Guangzhou 510620, China
| |
Collapse
|
4
|
Chen KJ, Chen YL, Ueng SH, Hwang TL, Kuo LM, Hsieh PW. Neutrophil elastase inhibitor (MPH-966) improves intestinal mucosal damage and gut microbiota in a mouse model of 5-fluorouracil-induced intestinal mucositis. Biomed Pharmacother 2021; 134:111152. [PMID: 33373916 DOI: 10.1016/j.biopha.2020.111152] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/03/2020] [Accepted: 12/14/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND 5-Fluorouracil (5-FU)-based chemotherapy is first-line chemotherapy for colorectal cancer. However, 5-FU-induced intestinal mucositis (FUIIM) is a common adverse effect that severely impairs drug tolerance and results in poor patient health. METHODS Male C57BL/6 mice were given 5-FU (50 mg/kg/day, i.p.) and treated with MPH-966 (5 and 7.5 mg/kg/day, p.o.) for five days. The body weight loss and the amount of food intake, and histopathological findings were recorded and analyzed. In addition, the neutrophil infiltration, levels of neutrophil serine proteases and pro-inflammatory cytokines, and tight junction proteins expression in intestinal tissues were determined. The ecology of gut microbiota was performed through next-generation sequencing technologies. RESULTS Neutrophil elastase (NE) overexpression is a key feature in FUIIM. This study showed that treatment with the specific NE inhibitor MPH-966 (7.5 mg/kg/day, p.o.) significantly reversed 5-FU-induced loss in body weight and food intake; reversed villous atrophy; significantly suppressed myeloperoxidase, NE, and proteinase 3 activity; and reduced pro-inflammatory cytokine expression in an FUIIM mouse model. In addition, MPH-966 prevented 5-FU-induced intestinal barrier dysfunction, as indicated by the modulated expression of the tight junction proteins zonula occludin-1 and occludin. MPH-966 also reversed 5-FU-induced changes in gut microbiota diversity and abundances, specifically the Firmicutes-to-Bacteroidetes ratio; Muribaculaceae, Ruminococcaceae, and Eggerthellaceae abundances at the family level; and Candidatus Arthromitus abundance at the genus level. CONCLUSION These data indicate that NE inhibitor is a key treatment candidate to alleviate FUIIM by regulating abnormal inflammatory responses, intestinal barrier dysfunction, and gut microbiota imbalance.
Collapse
Affiliation(s)
- Kung-Ju Chen
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Li Chen
- Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shir-Hwa Ueng
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | - Tsong-Long Hwang
- Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Anesthesiology, Chang Gung Memorial Hospital, Linkou, Taiwan; Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Taoyuan, Taiwan; Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Taoyuan, Taiwan; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Liang-Mou Kuo
- Department of General Surgery, Chang Gung Memorial Hospital, Chiayi, 613, Taiwan.
| | - Pei-Wen Hsieh
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Natural Products, School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Anesthesiology, Chang Gung Memorial Hospital, Linkou, Taiwan; Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Taoyuan, Taiwan.
| |
Collapse
|
5
|
Chen KJ, Lo WF, Chen I, Chen MYC. Clinical application of a surgical navigation system for the retrieval of fractured dental needles. Br J Oral Maxillofac Surg 2020; 59:256-257. [PMID: 33461821 DOI: 10.1016/j.bjoms.2020.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/01/2020] [Indexed: 11/27/2022]
Affiliation(s)
- K J Chen
- Division of Oral & Maxillofacial Surgery, Dental Department, China Medical University Hospital, Taichung, Taiwan.
| | - W F Lo
- Division of Oral & Maxillofacial Surgery, Dental Department, China Medical University Hospital, Taichung, Taiwan.
| | - I Chen
- Division of Oral & Maxillofacial Surgery, Dental Department, China Medical University Hospital, Taichung, Taiwan.
| | - M Y C Chen
- Division of Oral & Maxillofacial Surgery, Dental Department, China Medical University Hospital, Taichung, Taiwan; College of Dentistry, China Medical University, Taichung, Taiwan.
| |
Collapse
|
6
|
Abstract
This 24-mo randomized controlled trial was based on a double-blind parallel design, and it compared the effectiveness of 2 fluoride application protocols in arresting dentine caries in primary teeth. Three-year-old children with active dentine caries were recruited and randomly allocated to 2 treatment groups. Children in group A received a semiannual application of a 25% silver nitrate (AgNO3) solution followed by a commercially available varnish with 5% sodium fluoride (NaF) on the carious tooth surfaces. Children in group B received a semiannual application of a 25% AgNO3 solution followed by another commercially available varnish with 5% NaF containing functionalized tricalcium phosphate (fTCP). Carious tooth surfaces that were hard when probing were classified as arrested. Intention-to-treat analysis and a hierarchical generalized linear model were undertaken. A total of 408 children with 1,831 tooth surfaces with active dentine caries were recruited at baseline, and 356 children (87%) with 1,607 tooth surfaces (88%) were assessed after 24 mo. At the 24-mo evaluation, the mean (SD) number of arrested carious tooth surfaces per child were 1.8 (2.2) and 2.6 (3.3) for group A (without fTCP) and group B (with fTCP), respectively (P = 0.003). The arrest rates at the tooth surface level were 42% for group A and 57% for group B (P < 0.001). Results of the hierarchical generalized linear model indicated that protocol B (with fTCP) had a higher predicted probability (PP = 0.656) in arresting dentine caries than protocol A (without fTCP; PP = 0.500) when the carious lesions were on buccal/lingual surfaces, were on anterior teeth, had dental plaque coverage, and were in children from low-income families (P = 0.046). In conclusion, protocol B, which applied a 25% AgNO3 solution followed by a commercially available 5% NaF varnish with fTCP semiannually, is more effective in arresting dentine caries in primary teeth as compared with protocol A, which applied a 25% AgNO3 solution followed by another commercially available 5% NaF varnish without fTCP semiannually (ClinicalTrials.gov NCT03423797).
Collapse
Affiliation(s)
- K J Chen
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong SAR, China
| | - S S Gao
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong SAR, China
| | - D Duangthip
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong SAR, China
| | - E C M Lo
- Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong SAR, China
| | - C H Chu
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong SAR, China
| |
Collapse
|
7
|
Gabriel PG, Chen KJ, Alasfour A, Pailla T, Doyle WK, Devinsky O, Friedman D, Dugan P, Melloni L, Thesen T, Gonda D, Sattar S, Wang SG, Gilja V. Neural correlates of unstructured motor behaviors. J Neural Eng 2019; 16:066026. [DOI: 10.1088/1741-2552/ab355c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
8
|
Chen KJ, Yu T, Pan J, Liu LN, Lang M, Bai J. [Effect of different medication time prior to corneal refractive surgery on tear film stability]. Zhonghua Yan Ke Za Zhi 2018; 54:744-747. [PMID: 30347561 DOI: 10.3760/cma.j.issn.0412-4081.2018.10.005] [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] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of different medication time prior to corneal refractive surgery on tear film stability. Methods: Prospective cohort study. A total of 60 patients (60 eyes), including 38 males (63.3%) and 22 females (37.7%) with an average age of (24.2±5.1) years (form 18 to 37 years), who had planned for corneal refractive surgery with normal ocular surface disease index score were included in this study. The patients were divided into 1d group (medication of 1 day, 30 eyes) and 3d group (medication of 3 days, 30 eyes) randomly. The first tear break up time (FBUT), the average tear break up time (AVBUT) and the dry eye grade score were recorded on the examination day and the operation day with Keratograph 5M. The difference of FBUT and AVBUI between the two groups was compared with the independent sample t test. The difference of FBUT and AVBUT between the examination day and the operation day was compared with the paired t test. The difference of the dry eye classification between the two groups was compared using chi-square test. Results: The FBUT and AVBUT of 1d group and 3d group were (10.89±5.19)s and (10.88±6.82)s, (16.24±3.62)s and (16.21±4.74)s respectively in preoperative examination, and (10.65±6.03)s and (8.14±5.75)s, (15.14±5.30)s and (12.86±5.92)s respectively in operation day. There was no significant difference in FBUT and AVBUT between the two groups (t=0.01, 1,47, 0.02, 1.44; P>0.05). However, in the 3d group, the AVBUT of operation day decreased as compared with that of the examination day, and the difference was statistically significant (t=2.31, P<0.05). There was no significant difference in the distribution of dry eye classification between the two groups (χ(2)=0.07, 3.36; P>0.05). Conclusion: Both of medication of 1 day and medication of 3 days prior to corneal refractive surgery can provide a similar tear film stability, however more attention should be paid to the medication for patients with asymptomatic but abnormal BUT. (Chin J Ophthalmol, 2018, 54: 744-747).
Collapse
Affiliation(s)
- K J Chen
- Department of Ophthalmology, Institute of Field Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | | | | | | | | | | |
Collapse
|
9
|
Zhao LN, Hu YJ, Liu WY, Su YX, Chen KJ, Lu YQ. [Multiple facial deformities on accessory maxilla]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:701-702. [PMID: 30392228 DOI: 10.3760/cma.j.issn.1002-0098.2018.10.010] [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: 11/05/2022]
Affiliation(s)
- L N Zhao
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - Y J Hu
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - W Y Liu
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - Y X Su
- Department of Oral and Maxillofacial Surgery, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - K J Chen
- Department of Oral and Maxillofacial Radiology, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| | - Y Q Lu
- Department of Orthodontics, Xiangya Stomatology Hospital, Central South University, Changsha 410000, China
| |
Collapse
|
10
|
Huang JC, Yang J, Huang M, Zhu ZS, Sun XB, Zhang BH, Xu XL, Meng WG, Chen KJ, Xu BC. Effect of pre-slaughter shackling and wing flapping on plasma parameters, postmortem metabolism, AMPK, and meat quality of broilers. Poult Sci 2018; 97:1841-1847. [PMID: 29462466 DOI: 10.3382/ps/pey019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/08/2018] [Indexed: 12/31/2022] Open
Abstract
The objective of this study was to determine the effects of shackling and wing flapping on stress, postmortem metabolism, AMP-activated protein kinase (AMPK), and quality of broiler pectoralis major. Before slaughter, a total of 80 Arbor Acres broilers was randomly categorized into 2 replicate pens (40 broilers per pen) and each pen randomly divided into 2 groups (shackling, T; control, C). Corticosterone, creatine kinase, and lactate dehydrogenase were determined on blood plasma parameters. Pectoralis major were removed after evisceration and used for determination of energy metabolism, meat quality, and AMPK phosphorylation. In this study, shackling and wing flapping increased (P < 0.05) plasma corticosterone level, creatine kinase activity, and lactate dehydrogenase activity. Shackling and wing flapping increased (P < 0.05) AMPKα(Thr172) and acetyl-CoA carboxylase (ACC) phosphorylation, followed by rapid glycolysis and accumulation of lactic acid, and leading to a fast pH decline in the initial postmortem meat. Shackling and wing flapping have an adverse effect on final meat quality, which increased (P < 0.05) muscle lightness, drip loss, and cooking loss. The results indicate that antemortem shackling and wing flapping increased stress and AMPKα(Thr172) phosphorylation, which may accelerate glycolysis and lead to a low water-holding capacity of broiler meat.
Collapse
Affiliation(s)
- J C Huang
- College of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - J Yang
- Nanjing Innovation Center of Meat Products Processing, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - M Huang
- Nanjing Innovation Center of Meat Products Processing, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Z S Zhu
- Nanjing Innovation Center of Meat Products Processing, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - X B Sun
- Nanjing Innovation Center of Meat Products Processing, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - B H Zhang
- College of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - X L Xu
- Nanjing Innovation Center of Meat Products Processing, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - W G Meng
- College of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - K J Chen
- College of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - B C Xu
- Nanjing Innovation Center of Meat Products Processing, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.,The State Key Laboratory of Meat Processing and Quality Control, Jiangsu Yurun Meat & Food Co., Ltd., Nanjing, 211806, China
| |
Collapse
|
11
|
Zhang XW, Lin T, Zhang P, Song HC, Jin H, Xu J, Xu J, Wang PJ, Niu KY, Chen KJ. Tunable quantum dot arrays as efficient sensitizers for enhanced near-infrared electroluminescence of erbium ions. Nanoscale 2018; 10:4138-4146. [PMID: 29436557 DOI: 10.1039/c7nr08820e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Under electrical pumping conditions, high-efficiency Si-based near-infrared light generation and amplification on a chip have long been pursued for future optical interconnection technology. However, the overall performance of Si-based near-infrared electroluminescence (EL) devices, including the overall efficiency, turn-on voltage and stability under operational conditions, can rarely meet the requirements of monolithic optoelectronic integration. In this work, we designed a confined crystallization growth strategy for fabricating metal oxide quantum dot (QD) arrays embedded in Si-based films as sensitizers of Er3+ ions. Through the precise control of particle size and number density of QD sensitizers, the near-infrared photoluminescence (PL) emission of Er3+ ions can be enhanced by more than three orders of magnitude. More significantly, such hierarchical control over the regular arrangement of QD arrays not only considerably enhances the resonance energy transfer efficiency, but also offers an effective conduction path for carrier transport. Therefore, the corresponding near-infrared EL device exhibits a decreased turn-on voltage of 4.5 V, a high external quantum efficiency of 0.7%, and a long operational lifetime of more than 1000 hours, making this device superior to most Si-based on-chip near-infrared EL devices. This well-controlled metal oxide QD array represents an ideal sensitizer to effectively promote the EL emission of rare earth ions and reduce the turn-on voltage. Meanwhile, the analysis of the carrier transport mechanism paves the way for future research into resonance energy transfer under electrical pumping conditions.
Collapse
Affiliation(s)
- X W Zhang
- Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, P. R. China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Chang YW, Tseng CP, Lee CH, Hwang TL, Chen YL, Su MT, Chong KY, Lan YW, Wu CC, Chen KJ, Lu FH, Liao HR, Hsueh C, Hsieh PW. β-Nitrostyrene derivatives attenuate LPS-mediated acute lung injury via the inhibition of neutrophil-platelet interactions and NET release. Am J Physiol Lung Cell Mol Physiol 2018; 314:L654-L669. [PMID: 29351433 DOI: 10.1152/ajplung.00501.2016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Acute lung injury (ALI) and the acute respiratory distress syndrome (ARDS) are high-mortality and life-threatening diseases that are associated with neutrophil activation and accumulation within lung tissue. Emerging evidence indicates that neutrophil-platelet aggregates (NPAs) at sites of injury increase acute inflammation and contribute to the development of ALI. Although numerous studies have increased our understanding of the pathophysiology of ALI, there is still a lack of innovative and useful treatments that reduce mortality, emphasizing that there is an urgent need for novel treatment strategies. In this study, a new series of small compounds of β-nitrostyrene derivatives (BNSDs) were synthesized, and their anti-inflammatory bioactivities on neutrophils and platelets were evaluated. The new small compound C7 modulates neutrophil function by inhibiting superoxide generation and elastase release. Compound C7 elicits protective effects on LPS-induced paw edema and acute lung injury via the inhibition of neutrophil accumulation, proinflammatory mediator release, platelet aggregation, myeloperoxidase activity, and neutrophil extracellular trap (NET) release. NET formation was identified as the bridge for the critical interactions between neutrophils and platelets by confocal microscopy and flow cytometry. This research provides new insights for elucidating the complicated regulation of neutrophils and platelets in ALI and sheds further light on future drug development strategies for ALI/ARDS and acute inflammatory diseases.
Collapse
Affiliation(s)
- Yao-Wen Chang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan
| | - Ching-Ping Tseng
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Molecular Medicine Research Center, Chang Gung University , Taoyuan , Taiwan.,Department of Laboratory Medicine, Chang Gung Memorial Hospital , Taoyuan , Taiwan
| | - Chih-Hsun Lee
- Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan
| | - Tsong-Long Hwang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan.,Research Center for Industry of Human Ecology, Chang Gung University of Science and Technology , Taoyuan , Taiwan.,Department of Anesthesiology, Chang Gung Memorial Hospital , Linkou , Taiwan
| | - Yu-Li Chen
- Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan
| | - Mei-Tzu Su
- Graduate Institute and Department of Microbiology, College of Medicine, National Taiwan University , Taipei , Taiwan
| | - Kowit-Yu Chong
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Department of Thoracic Medicine, Chang Gung Memorial Hospital at Linkou , Taoyuan , Taiwan
| | - Ying-Wei Lan
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan
| | - Chin-Chung Wu
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung , Taiwan
| | - Kung-Ju Chen
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan
| | - Fen-Hua Lu
- Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan
| | - Hsiang-Ruei Liao
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan.,Department of Anesthesiology, Chang Gung Memorial Hospital , Linkou , Taiwan
| | - Chuen Hsueh
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Molecular Medicine Research Center, Chang Gung University , Taoyuan , Taiwan.,Department of Pathology, Chang Gung Memorial Hospital, Linkou, Taoyuan , Taiwan
| | - Pei-Wen Hsieh
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University , Taoyuan , Taiwan.,Graduate Institute of Natural Products, College of Medicine, and Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University , Taoyuan , Taiwan.,Research Center for Industry of Human Ecology, Chang Gung University of Science and Technology , Taoyuan , Taiwan.,Department of Anesthesiology, Chang Gung Memorial Hospital , Linkou , Taiwan
| |
Collapse
|
13
|
Huang JC, Yang J, Huang M, Chen KJ, Xu XL, Zhou GH. The effects of electrical stunning voltage on meat quality, plasma parameters, and protein solubility of broiler breast meat. Poult Sci 2017; 96:764-769. [PMID: 27665003 DOI: 10.3382/ps/pew335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Accepted: 08/07/2016] [Indexed: 11/20/2022] Open
Abstract
This study was designed to compare the effects of different stunning voltages of pulsed direct current on meat quality of broilers. For this purpose, plasma parameters, blood loss, carcass damage, and meat water holding capacity, color, shear force, pH, and protein solubility were analyzed. A total of 400 broilers were divided into 5 treatment groups and stunned with 5, 15, 25, 35, and 45 V at 750 Hz and 10 s, respectively. Blood samples were collected immediately after cutting the neck. Pectoralis major muscles were removed from the carcass after chilling and placed on ice. Breast muscle pH and meat color were determined at both 2 and 24 h postmortem. Dripping loss, cooking loss, pressing loss, and cooked breast meat shear values were determined after 24 h postmortem. The 5 V treatment significantly increased (P < 0.05) blood plasma corticosterone and lactate concentration compared with the other groups. The carcass damage of wings, Pectoralis major, and Pectoralis minor was significant in the 5, 35, and 45 V groups. The pH of 2 h postmortem in the 5 and 45 V groups was significantly lower (P < 0.05) than in the 15 and 25 V groups. In the 5 and 45 V groups, the protein solubility and shear force value were significantly lower (P < 0.05) and dripping loss was significantly higher (P < 0.05) than the other groups.
Collapse
Affiliation(s)
- J C Huang
- College of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - J Yang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - M Huang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - K J Chen
- College of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - X L Xu
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - G H Zhou
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| |
Collapse
|
14
|
Liu Y, Chen KJ. [Depression, anxiety and thrombosis: evidences and pondering]. Zhonghua Nei Ke Za Zhi 2016; 55:670-672. [PMID: 27586972 DOI: 10.3760/cma.j.issn.0578-1426.2016.09.003] [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]
|
15
|
Huang JC, Yang J, Huang F, Huang M, Chen KJ, Xu XL, Zhou GH. Effect of fast pH decline during the early postmortem period on calpain activity and cytoskeletal protein degradation of broiler M. pectoralis major. Poult Sci 2016; 95:2455-63. [PMID: 27433017 DOI: 10.3382/ps/pew206] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 05/11/2016] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to determine the effects of fast pH decline during the early postmortem period on calpain activity and the degradation of cytoskeletal proteins in broilers. Eighty broilers were randomly categorized into two groups: physical restraint (PR) and free struggle (FS). M. pectoralis major (PM) was used for determination of calpain activity, shear value, ultrastructure of myofibrils, and the degradation of desmin, titin, nebulin, and troponin-T. The pH (6.05) of FS group is significantly low than PR group (6.38) at 0.3 h postmortem. Fast pH decline during the early postmortem period led to a decrease of μ/m-calpain activities at 0.3 and 3 h postmortem (P < 0.05), but did not affect the ultimate μ/m-calpain activity. An initial fast decrease in pH increased the degradation of desmin, titin, nebulin, and increased the 30 kDa degradation fragments of troponin-T. Therefore, the fast pH decline during the early postmortem period decreased the μ/m-calpain activity and increased the degradation of cytoskeletal proteins in broiler muscle. It is possible that the fast pH decline experienced an earlier activation of calpains that resulted in earlier protein degradation and ultimately lower shear force.
Collapse
Affiliation(s)
- J C Huang
- Department of Engineering, Nanjing Agricultural University, Nanjing 210095, China Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - J Yang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - F Huang
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing 100193, China
| | - M Huang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - K J Chen
- Department of Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - X L Xu
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - G H Zhou
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education China, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| |
Collapse
|
16
|
Xu BH, Zhong L, Liu QL, Xiao TY, Su JM, Chen KJ, Wang HQ, Dai YJ, Chen J. Characterization of grass carp spleen transcriptome during GCRV infection. Genet Mol Res 2016; 15:gmr6650. [PMID: 27173223 DOI: 10.4238/gmr.15026650] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of the study was to investigate the grass carp hemorrhagic infection pathway and its key-related genes. Grass carp reovirus (GCRV) might cause hemorrhagic disease in grass carps. Healthy grass carp fingerlings (N = 60) were divided into control and infected groups. Fish in the control group were intraperitoneally (ip) injected with 0.6% fish physiological saline; the infected group received 5,000,000 50% tissue culture infective doses of GCRV 873 standard strain, a double-stranded RNA (dsRNA) virus strain, ip, in 0.5 mL. Illumina HiSeqTM 2000 was used for transcriptome sequencing, and real-time polymerase chain reaction (PCR) used to detect complement factors II (C2), III (C3), and V (C5); profibrinolysin (PLG); and coagulation factor II (F2) expression. A total of 2,722,223 reads were detected in the control group, and 2,751,111 in the infected group. Among 11,023 unigenes obtained after transcriptome assembly, 10,021 unigenes were significantly differentially expressed. Gene ontology and KEGG analysis, a collection of databases dealing with genomes and biological pathways, were performed to classify unigenes into functional categories, to understand gene function and identify regulatory pathways. Real-time PCR analysis showed that C2, C3, C5, PLG, and F2 expression levels were down-regulated, confirming results of pathway-enrichment analysis. This is the first application of high-throughput sequencing technology to investigate the in vivo effects of GCRV, on genes and pathways involved in the immune response to infection in grass carp.
Collapse
Affiliation(s)
- B H Xu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - L Zhong
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Q L Liu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - T Y Xiao
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - J M Su
- College of Animal Veterinary and Medicine, Hunan Agricultural University, Changsha, China
| | - K J Chen
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - H Q Wang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Y J Dai
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - J Chen
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| |
Collapse
|
17
|
Xu BH, Chen KJ, Yao YB, Liu QL, Xiao TY, Su JM, Peng HZ. Cloning, characterization and expression analysis of coagulation factor II gene in grass carp (Ctenopharyngodon idella). Genet Mol Res 2015; 14:13764-78. [PMID: 26535692 DOI: 10.4238/2015.october.28.39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Here, we characterized the structure and function of the coagulation factor II (FII) gene in grass carp and determined its role in coagulation mechanisms. The FII gene EST was obtained using a constructed splenic transcriptome database; the full-length FII gene sequence was obtained by 3' and 5' RACE. The open reading frame (ORF) of FII was cloned and the full-length gene was found to be 1718 bp, with an ORF of 1572 bp; the gene contained a 25 bp 5'-untranslated region (UTR) and 108 bp 3'-UTR. The ORF encoded 524 amino acids, including 74 alkaline amino acids (arginine and lysine) and 69 acidic amino acids (aspartic acid and glutamic acid). The theoretical pI was 6.22. The calculated instability index (II) was 39.81, indicating that FII was a stable protein; the half-life period was predicted to be approximately 30 h. Amino acid sequence comparisons indicated that grass carp FII showed most similarity (71%) to FII of Takifugu rubripes, followed by Oplegnathus fasciatus (48% similarity) and Larimichthys crocea (47% similarity). A real-time reverse transcription PCR analysis showed that under normal circumstances, FII was most highly expressed in the liver, followed by the gill, spleen, thymus, and head-kidney (P < 0.001). After injection of the grass carp reovirus 873 (GCRV873), the pattern of FII expression was significantly altered (P < 0.001); gene expression was high after injection, suggesting a response involving the initiation of the coagulation system and defense of the body in combination with the platelet and complement system.
Collapse
Affiliation(s)
- B H Xu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - K J Chen
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Y B Yao
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - Q L Liu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - T Y Xiao
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| | - J M Su
- College of Animal Veterinary and Medicine, Hunan Agricultural University, Changsha, China
| | - H Z Peng
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, China
| |
Collapse
|
18
|
|
19
|
Zhao XF, Zhang JN, Dong HJ, Zhang T, Bian GL, Sun YW, Yao MH, Chen KJ, Xu GZ. Epidemiological characteristics of malaria in Ningbo City, China 2000-2011. Trop Biomed 2013; 30:267-276. [PMID: 23959492] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The objective of this study was to explore the trend and the epidemiological characteristics of malaria in Ningbo from 2000 through 2011 and provide scientific evidence for the prevention and control. Using the retrospective study, data relating to malaria epidemics during 2000-2011 in Ningbo were collected through the questionnaires of the cases and other important surveillance data. Adult mosquitoes were collected using CDC light traps baited with CO2. Results showed that Plasmodium vivax was the main species, and Anopheles sinensis was the only vector species of malaria. The annual incidence rates (per 100000) ranged from 0.156 to 3.224, and about 95.41% of the cases were imported. The cases occurred mainly between May and November and the incidence showed two peaks, and the local transmission of malaria was determined by vector density. Considering the vast majority of these infections were imported vivax malaria cases from domestic endemic areas (particularly Anhui province), and may lead to limited local transmission, strengthening the routine monitoring of imported malaria, ensuring timely diagnosis, improving case detection rate, giving a standardized treatment to patients and intensifying public health education on malaria prevention are extremely important to malaria prevention and control activities.
Collapse
Affiliation(s)
- X F Zhao
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo, China
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Abstract
Amputation or degloving injuries of the thumb or index finger are highly disabling. We describe the use of twin dorsal middle finger flaps harvested from the dorsal aspects of the middle and ring fingers, and based on one palmar proper digital artery, its venae comitantes, and the dorsal branches of the palmar digital nerves of the middle and ring fingers, respectively. These flaps offer advantages when large soft tissue defects of the thumb or index finger are present. In this study, twin dorsal middle finger flaps were used in nine patients (six thumbs, three index fingers). All flaps completely survived. At the mean follow-up of 20 months, the appearance of the reconstructed thumbs or index fingers was acceptable, the length was maintained, and the mean static 2-point discrimination values were 10 mm in the palmar flap and 13 mm in the dorsal flap of the reconstructed digit. All patients were satisfied with the appearance and mobility of the donor fingers. All but one donor finger showed normal finger pulp sensibility, with a static 2-point discrimination between 3 and 6 mm.
Collapse
Affiliation(s)
- W Qi
- Department of Hand Surgery, Tianjin Hospital, Tianjin, China.
| | | |
Collapse
|
21
|
Sun X, Chen KJ, Maddock-Carlin KR, Anderson VL, Lepper AN, Schwartz CA, Keller WL, Ilse BR, Magolski JD, Berg EP. Predicting beef tenderness using color and multispectral image texture features. Meat Sci 2012; 92:386-93. [PMID: 22647652 DOI: 10.1016/j.meatsci.2012.04.030] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Accepted: 04/25/2012] [Indexed: 11/27/2022]
Abstract
The objective of this study was to investigate the usefulness of raw meat surface characteristics (texture) in predicting cooked beef tenderness. Color and multispectral texture features, including 4 different wavelengths and 217 image texture features, were extracted from 2 laboratory-based multispectral camera imaging systems. Steaks were segregated into tough and tender classification groups based on Warner-Bratzler shear force. The texture features were submitted to STEPWISE multiple regression and support vector machine (SVM) analyses to establish prediction models for beef tenderness. A subsample (80%) of tender or tough classified steaks were used to train models which were then validated on the remaining (20%) test steaks. For color images, the SVM model correctly identified tender steaks with 100% accurately while the STEPWISE equation identified 94.9% of the tender steaks correctly. For multispectral images, the SVM model predicted 91% and STEPWISE predicted 87% average accuracy of beef tender.
Collapse
Affiliation(s)
- X Sun
- Department of Animal Science, North Dakota State University, Fargo, ND, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Liu Y, Sun SH, Xu J, Zhao L, Sun HC, Li J, Mu WW, Xu L, Chen KJ. Broadband antireflection and absorption enhancement by forming nano-patterned Si structures for solar cells. Opt Express 2011; 19 Suppl 5:A1051-A1056. [PMID: 21935247 DOI: 10.1364/oe.19.0a1051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this letter, we report the antireflection and light absorption enhancement by forming sub-wavelength nano-patterned Si structures via nano-sphere lithography technique. It is found that the surface reflection can be significantly suppressed in a wide spectral range (400-1000 nm) and the weighted mean reflection is less than 5%. Meanwhile, the broad band optical absorption enhancement is achieved consequently. Heterojunction solar cells are prepared by depositing ultrathin amorphous Si film on the nano-patterned Si structures, the short circuit current density increases to 37.2 mA/cm(2)and the power conversion efficiency is obviously improved compared to the reference cell on flat Si substrate.
Collapse
Affiliation(s)
- Y Liu
- National Laboratory of Solid State Microstructures, Department of Microelectronics and Optoelectronics and Department of Physics, Nanjing University, Nanjing, China
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Huang R, Wang DQ, Ding HL, Wang X, Chen KJ, Xu J, Guo YQ, Song J, Ma ZY. Enhanced electroluminescence from SiN-based multilayer structure by laser crystallization of ultrathin amorphous Si-rich SiN layers. Opt Express 2010; 18:1144-1150. [PMID: 20173937 DOI: 10.1364/oe.18.001144] [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: 05/28/2023]
Abstract
Luminescent SiN-based multilayers were prepared in a plasma enhanced chemical vapor deposition system followed by subsequently laser crystallization of ultrathin amorphous Si-rich SiN sublayers. The cross-sectional TEM analysis reveals that grain size of Si nanocrystals embedded in the Si-rich SiN sublayers is independent of the laser fluence, while the grain density can be well controlled by the laser fluence. The devices containing the laser crystallized multilayers show a low turn-on voltage of 5 V and exhibit strong green light emission under both optical and electrical excitations. Moreover, the device after laser-irradiated at 554 mJ/cm(2) shows a significantly enhanced EL intensity as well as external quantum efficiency compared with the device without laser irradiation. The EL mechanism is suggested from the bipolar recombination of electron-hole pairs at Si nanocrystals. The improved performance of the devices was discussed.
Collapse
Affiliation(s)
- R Huang
- State Key Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, People's Republic of China.
| | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Chen KJ, Hung FY, Chang SJ. Structural characteristic, Raman analysis and optical properties of indium-doped ZnO nanoparticles prepared by sol-gel method. J Nanosci Nanotechnol 2009; 9:3325-3329. [PMID: 19453011 DOI: 10.1166/jnn.2009.vc03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Un-doped and indium (0-9 at.%) doped ZnO nanoparticles were prepared by the sol-gel method. The nanoparticles were heated at 700 degrees C-800 degrees C for 1 hour in air and then analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDS), Raman spectra and photoluminescence (PL). The results were compared to investigate the structural characteristics and physical properties. XRD patterns of the Indium-doped ZnO (IZO) nanoparticles were similar to those of the ZnO nanoparticles. Notably, the crystalline quality of the ZnO nanoparticles had reduced with increasing the concentration of indium doping. The In2O3 phase of IZO and the crystallized structures affected the UV emission band and the green emission band of PL. The Indium-doped (5 at.% - 7 at.%) ZnO nanoparticles possessed higher crystalline quality and better optical properties.
Collapse
Affiliation(s)
- K J Chen
- Institute of Microelectronics and Department of Electrical Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan
| | | | | |
Collapse
|
25
|
Chen KJ. Current status and problems in developing clinical guidelines for Chinese medicine and integrative medicine. ACTA ACUST UNITED AC 2009; 7:301-5. [DOI: 10.3736/jcim20090401] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
26
|
Zhou J, Chen GR, Liu Y, Xu J, Wang T, Wan N, Ma ZY, Li W, Song C, Chen KJ. Electroluminescent devices based on amorphous SiN/Si quantum dots/amorphous SiN sandwiched structures. Opt Express 2009; 17:156-162. [PMID: 19129883 DOI: 10.1364/oe.17.000156] [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: 05/27/2023]
Abstract
A single layer of dense Si quantum dots with average size of 4 nm sandwiched in amorphous SiN layers was prepared by laser crystallization of ultrathin amorphous Si film followed by subsequently thermal annealing. The electroluminescent diodes were fabricated by evaporating Al electrodes on back sides of p-Si substrates and the top surface of samples. Room temperature electroluminescence can be detected with applying the negative voltage around 10V on the top gate electrode and the luminescent intensity is increased with increasing the applied voltage. It was found that the integrated luminescent intensity is linearly proportional to the injection current which suggested the intensity depends on the concentrations of injected carriers after Fowler-Nordheim tunneling through amorphous SiN barriers. The influence of the amorphous SiN with different band gap on the device performance was also discussed briefly.
Collapse
Affiliation(s)
- J Zhou
- Department of Physics, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Chang WH, Chu HP, Jiang YN, Li SH, Wang Y, Chen CH, Chen KJ, Lin CY, Ju YT. Genetic variation and phylogenetics of Lanyu and exotic pig breeds in Taiwan analyzed by nineteen microsatellite markers. J Anim Sci 2008; 87:1-8. [PMID: 18708610 DOI: 10.2527/jas.2007-0562] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The Lanyu pig is an indigenous miniature pig breed on Lanyu Islet near Taiwan, with a mitochondrial DNA genetic lineage remote from Asian and European pig breeds. The unknown population genetic structure and increased inbreeding among the small population of conserved Lanyu pigs is now of great conservation concern. Additionally, the presence for more than a century of exotic pig breeds in Taiwan has made gene introgression from exotic pig breeds into Lanyu pigs very possible. The present study thus aimed to investigate nuclear genetic variation within the conserved Lanyu pigs and the phylogenetic relationship and possible genetic introgression between Lanyu and exotic pig breeds by determining the polymorphism of 19 microsatellite loci. In the neighbor-joining tree constructed from 7 pig breeds based on Cavalli-Sforza and Edward chord genetic distances, 3 major clades were recognized, in which the Asian and European breeds were separately clustered into 2 clades with a 93.0 and 99.9% bootstrap confidence value, respectively. All individuals of the Lanyu breed formed a unique subclade within the Asian clade based on the distance of the proportion of shared alleles, -ln(ps), suggesting that the Lanyu breed possesses a unique nuclear genetic structure and that no nuclear gene introgression from exotic breeds into the conserved Lanyu pigs has occurred in recent history. Fifteen of 19 microsatellite loci deviated from Hardy-Weinberg equilibrium (by Wright's statistic), suggesting a significant loss of heterozygosity in the conserved population. The valuable nuclear genetic structure and phylogenetic information should assist future conservation and population management of Lanyu pigs.
Collapse
Affiliation(s)
- W H Chang
- Department of Animal Science and Technology, National Taiwan University, Taipei, Taiwan 10673
| | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Young SJ, Ji LW, Chang SJ, Liang SH, Lam KT, Fang TH, Chen KJ, Du XL, Xue QK. Erratum: ZnO-based MIS photodetectors. Sens Actuators A Phys 2008; 141:225-229. [PMID: 35041724 PMCID: PMC8740771 DOI: 10.1016/j.sna.2007.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2007] [Revised: 06/04/2007] [Accepted: 06/04/2007] [Indexed: 06/01/2023]
Abstract
[This corrects the article DOI: 10.1016/j.sna.2007.06.006.].
Collapse
Affiliation(s)
- S J Young
- Institute of Microelectronics & Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - L W Ji
- Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin 632, Taiwan
| | - S J Chang
- Institute of Microelectronics & Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
- Institute of Nanotechnology and Nanosystems Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan
| | - S H Liang
- Institute of Nanotechnology and Nanosystems Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan
| | - K T Lam
- Department of Information Communication, Leader University, Tainan 70970, Taiwan
| | - T H Fang
- Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin 632, Taiwan
| | - K J Chen
- Institute of Microelectronics & Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - X L Du
- Institute of Physics, Chinese Academy of Science, Beijing 100080, PR China
| | - Q K Xue
- Institute of Physics, Chinese Academy of Science, Beijing 100080, PR China
| |
Collapse
|
29
|
Yu LW, Chen KJ, Song J, Xu J, Li W, Li XF, Wang JM, Huang XF. New self-limiting assembly model for Si quantum rings on Si(100). Phys Rev Lett 2007; 98:166102. [PMID: 17501433 DOI: 10.1103/physrevlett.98.166102] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2006] [Indexed: 05/15/2023]
Abstract
We propose a new self-limiting assembly model for Si quantum rings on Si(100) where the ring's formation and evolution are driven by a growth-etching competition mechanism. The as-grown ring structure in a plasma enhanced chemical vapor deposition system has excellent rotational symmetry and superior morphology with a typical diameter, edge width, and height of 150-300, 10, and 5 nm, respectively. Based on this model, the size and morphology can be controlled well by simply tuning the timing procedure. We suggest that this growth model is not limited to certain material system, but provides a general scheme to control and tailor the self-assembly nanostructures into the desired size, shape, and complexity.
Collapse
Affiliation(s)
- L W Yu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Chen KJ, Sheliga BM, Fitzgibbon EJ, Miles FA. Initial ocular following in humans depends critically on the fourier components of the motion stimulus. Ann N Y Acad Sci 2006; 1039:260-71. [PMID: 15826980 PMCID: PMC1383627 DOI: 10.1196/annals.1325.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Visual motion is sensed by low-level (energy-based) and high-level (feature-based) mechanisms. Our interest is in the motion detectors underlying the initial ocular following responses (OFR) that are elicited at ultrashort latencies by sudden motions of large images. OFR were elicited in humans by applying horizontal motion to vertical square-wave gratings lacking the fundamental. In the frequency domain, a pure square wave is composed of the odd harmonics--first, third, fifth, seventh, etc.--such that the third, fifth, seventh, etc., have amplitudes that are one-third, one-fifth, one-seventh, etc., that of the first, and the missing fundamental stimulus lacks the first harmonic. Motion consisted of successive quarter-wavelength steps, so the features and 4n+1 harmonics (where n = integer) shifted forward, whereas the 4n-1 harmonics--including the strongest Fourier component (the third harmonic)--shifted backward (spatial aliasing). Thus, the net Fourier energy and the non-Fourier features moved in opposite directions. Initial OFR, recorded with the search coil technique, had minimum latencies of 60 to 70 ms and were always in the direction of the third harmonic, for example, leftward steps resulted in rightward OFR. Thus, the earliest OFR were strongly dependent on the motion of the major Fourier component, consistent with mediation by oriented spatiotemporal visual filters as in the well-known energy model of motion detection. Introducing interstimulus intervals of 10 to 100 ms (during which the screen was uniform gray) reversed the initial direction of tracking, consistent with extensive neurophysiological and psychophysical data suggesting that the visual input to the motion detectors has a biphasic temporal impulse response.
Collapse
Affiliation(s)
- K J Chen
- Laboratory of Sensorimotor Research, National Institutes of Health, Building 49 Room 2A50, 49 Convent Drive, Bethesda, MD 20892-4435, USA
| | | | | | | |
Collapse
|
31
|
Abstract
Our study was concerned with the disparity detectors underlying the initial disparity vergence responses (DVRs) that are elicited at ultrashort latencies by binocular disparities applied to large images. DVRs were elicited in humans by applying horizontal disparity to vertical square-wave gratings lacking the fundamental (termed here, the "missing fundamental"). In the frequency domain, a pure square wave is composed of odd harmonics--first, third, fifth, seventh, etc.--such that the third, fifth, seventh, etc., have amplitudes that are one-third, one-fifth, one-seventh, etc., that of the first, and the missing fundamental lacks the first harmonic. The patterns seen by the two eyes have a phase difference of one-quarter wavelength, so the disparity of the features and 4n + 1 harmonics (where n = integer) has one sign (crossed or uncrossed), whereas the 4n - 1 harmonics--including the strongest Fourier component (the third harmonic)--has the opposite sign (uncrossed or crossed): spatial aliasing. The earliest DVRs, recorded with the search-coil technique, had minimum latencies of 70 to 80 ms and were generally in the direction of the third harmonic, that is, uncrossed disparities resulted in convergent eye movements. In other experiments on the DVRs, one eye saw a missing fundamental and the other saw a pure sine wave with the contrast and wavelength of the third harmonic but differing in phase by one-quarter wavelength. This resulted in short-latency vergence in accordance with matching of the third harmonic. These data all indicate the importance of the Fourier components, consistent with early spatial filtering prior to binocular matching.
Collapse
Affiliation(s)
- B M Sheliga
- Laboratory of Sensorimotor Research, National Institutes of Health, Building 49 Room 2A50, 49 Convent Drive, Bethesda MD 20892-4435, USA.
| | | | | | | |
Collapse
|
32
|
Sheliga BM, Chen KJ, FitzGibbon EJ, Miles FA. The initial ocular following responses elicited by apparent-motion stimuli: reversal by inter-stimulus intervals. Vision Res 2006; 46:979-92. [PMID: 16242168 PMCID: PMC2430525 DOI: 10.1016/j.visres.2005.09.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [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: 07/11/2005] [Revised: 08/25/2005] [Accepted: 09/02/2005] [Indexed: 11/30/2022]
Abstract
Transient apparent-motion stimuli, consisting of single 1/4-wavelength steps applied to square-wave gratings lacking the fundamental ("missing fundamental stimulus") and to sinusoidal gratings, were used to elicit ocular following responses (OFRs) in humans. As previously reported [Sheliga, B. M., Chen, K. J., FitzGibbon, E. J., & Miles, F. A. (2005). Initial ocular following in humans: a response to first-order motion energy. Vision Research, in press], the earliest OFRs were strongly dependent on the motion of the major Fourier component, consistent with early spatio-temporal filtering prior to motion detection, as in the well-known energy model of motion analysis. Introducing inter-stimulus intervals (ISIs) of 10-200 ms, during which the screen was gray with the same mean luminance, reversed the initial direction of the OFR, the peak reversed responses (with ISIs of 20-40 ms) being substantially greater than the non-reversed responses (with an ISI of 0 ms). When the mean luminance was reduced to scotopic levels, reversals now occurred only with ISIs > or=60 ms and the peak reversed responses (with ISIs of 60-100 ms) were substantially smaller than the non-reversed responses (with an ISI of 0 ms). These findings are consistent with the idea that initial OFRs are mediated by first-order motion-energy-sensing mechanisms that receive a visual input whose temporal impulse response function is strongly biphasic in photopic conditions and almost monophasic in scotopic conditions.
Collapse
Affiliation(s)
- B M Sheliga
- Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | | | | | | |
Collapse
|
33
|
Sheliga BM, Chen KJ, Fitzgibbon EJ, Miles FA. Initial ocular following in humans: a response to first-order motion energy. Vision Res 2006; 45:3307-21. [PMID: 15894346 PMCID: PMC1414793 DOI: 10.1016/j.visres.2005.03.011] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2005] [Revised: 03/18/2005] [Accepted: 03/18/2005] [Indexed: 11/20/2022]
Abstract
Visual motion is sensed by low-level (energy-based) and high-level (feature-based) mechanisms. Ocular following responses (OFR) were elicited in humans by applying horizontal motion to vertical square-wave gratings lacking the fundamental ("missing fundamental stimulus"). Motion consisted of successive 1/4-wavelength steps, so the features and 4n+1 harmonics (where n=integer) shifted forwards, whereas the 4n-1 harmonics--including the strongest Fourier component (the 3rd harmonic)--shifted backwards (spatial aliasing). Initial OFR, recorded with the electromagnetic search coil technique, were always in the direction of the 3rd harmonic, e.g., leftward steps resulted in rightward OFR. Thus, the earliest OFR were strongly dependent on the motion of the major Fourier component, consistent with early spatio-temporal filtering prior to motion detection, as in the well-known energy model of motion analysis.
Collapse
Affiliation(s)
- B M Sheliga
- Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Building 49 Room 2A50, 49 Convent Drive, Bethesda, MD 20892, USA.
| | | | | | | |
Collapse
|
34
|
Chen KJ, Chen CH, Cheng CH, Wu MJ, Shu KH. Risk factors for peptic ulcer disease in renal transplant patients--11 years of experience from a single center. Clin Nephrol 2004; 62:14-20. [PMID: 15267008] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
BACKGROUND Peptic ulcer disease is a common complication among renal transplant recipients and causes significant morbidity and mortality. METHODS From 1990 through 2000, 465 renal transplant patients were followed-up in our institute. Most patients received corticosteroids and cyclosporine-based immunosuppressive regimen. About one third (n = 156) of them received mycophenolate mofetil. Patients with endoscopy-proved peptic ulcer disease were identified by reviewing medical records. Possible risk factors were analyzed by univariate analysis and multiple logistic regression analysis. RESULTS Among 465 kidney transplant patients, there were 181 (38.9%) who suffered at least 1 episode of peptic ulcer disease. The most frequent types of peptic ulcer disease were gastritis, gastric ulcer, duodenal ulcer, esophagitis, duodenitis and esophageal ulcer. By multivariate analysis, the use of methylprednisolone pulse therapy (odds ratio = 3.954, 95% confidence interval = 3.154-18.312, p = 0.03) and history of pre-transplant peptic ulcer disease (odds ratio = 7.599, 95% CI = 1.211-12.905, p < 0.0001) were independent risk factors for posttransplant peptic ulcer disease. CONCLUSIONS Our findings demonstrated that renal transplant patients who undergo methylprednisolone pulse therapy for acute rejection or who have a history of pre-transplant peptic ulcer disease carry a high risk for the development of peptic ulcer disease and deserve intensive antiulcer treatment.
Collapse
Affiliation(s)
- K J Chen
- Department of Internal Medicine, Division of Nephrology, Taichung Veterans General Hospital, Institute of Medicine of Chung-Shan Medical University, Taichung, Taiwan
| | | | | | | | | |
Collapse
|
35
|
Chui SH, Chan K, Wong RNS, Chen KJ. A panel study on the effects of a Chinese medicinal suppository, Vigconic VI-28, on insulin-like growth factor 1 and homocysteine in healthy men. ACTA ACUST UNITED AC 2004; 26:349-55. [PMID: 15319814 DOI: 10.1358/mf.2004.26.5.831326] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Changes in serum homocysteine (Hcy), often related to stroke and vascular dementia, are negatively correlated with changes in serum insulin-like growth factor 1 (IGF-1) and growth hormone (GH) replacement decreases Hcy levels in men with GH deficiency. Very little information on the effects of Chinese medicines on GH and Hcy is available in the literature published in English. In this study, the effects of a Chinese medicine suppository, Vigconic VI-28 (VI-28), consisting of concentrated extracts of a composite mixture of herbal materials, on serum IGF-1 and Hcy were studied. In vivo observations after treatment with Chinese medicines have often indicated changes in biochemical profiles of measurable parameters related to those changes in endocrine secretions. Thirty six healthy males (age 47-66) were under observation over a 16-week schedule after using VI-28 suppository from 0 to 12 weeks. Blood specimens were taken monthly (except at the end of week 8) for analysis of Hcy and IGF-1 levels. Compared with week 0, IGF-1 levels (192.5 +/- 66.4 ng/ml) were significantly elevated at week 4 (211.7 +/- 80.5, p < 0.05) and week 12 (226.6 +/- 95.2 ng/ml, p = 0.01). No significant changes were observed for Hcy for the whole cohort from week 0 to week 16. When the cohort was divided into 2 groups using a Hcy level of 13.0 micro mol/l as the cut-off, a significant (p < 0.05) difference in IGF-1 was observed between the 2 groups at week 12 only. The mean IGF-1 of 14 subjects with higher Hcy levels was lower than that of the 22 subjects with lower Hcy. We believe that VI-28 may exert a regulatory effect on the relationship between Hcy and IGF-1, at least in subjects with relatively low levels of Hcy. In addition, we also observed an apparent association of hyperhomocysteinemia (Hcy> or =13.0 micromol/l) with decreased IGF-1.
Collapse
Affiliation(s)
- S H Chui
- Research and Development Division, School of Chinese Medicine, Beijing, China
| | | | | | | |
Collapse
|
36
|
Chen KJ, Keshner EA, Peterson BW, Hain TC. Modeling head tracking of visual targets. J Vestib Res 2003; 12:25-33. [PMID: 12515889] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Control of the head involves somatosensory, vestibular, and visual feedback. The dynamics of these three feedback systems must be identified in order to gain a greater understanding of the head control system. We have completed one step in the development of a head control model by identifying the dynamics of the visual feedback system. A mathematical model of human head tracking of visual targets in the horizontal plane was fit to experimental data from seven subjects performing a visual head tracking task. The model incorporates components based on the underlying physiology of the head control system. Using optimization methods, we were able to identify neural processing delay, visual control gain, and neck viscosity parameters in each experimental subject.
Collapse
Affiliation(s)
- K J Chen
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA.
| | | | | | | |
Collapse
|
37
|
Han L, Chen KJ. [The protective effects of yi-xin-kang capsule on the structure and function of rat myocardial mitochondria]. Zhongguo Zhong Yao Za Zhi 2001; 26:773-7. [PMID: 12776352] [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: 03/02/2023]
Abstract
OBJECT To observe the injury induced by Isoproterenol (ISO) on the structure and function of rat myocardial mitochondria and the protective effects of Yi-Xin-Kang Capsule (H303). METHOD After injection of ISO, rat myocardial mitochondria were isolated. The activities of phospholipidase A2(PLA2) and Ca(2+)-ATPase, the content of phospholipids (PL) and high-energy phosphates, membrane lipid fluidity (LFU) and respiration function were determined respectively. RESULT ISO induced severe injury to myocardial mitochondria. The activity of PLA2 was significantly activated. The intensity of LFU, the activity of Ca(2+)-ATPase, respiration function of mitochondria and the contents of PL and high-energy phosphates of myocardium tissue were significantly decreased. Oral administration of H303 significantly decreased the activity of PLA2. The contents of PL and LFU, the activity of Ca(2+)-ATPase were significantly increased. The respiration function of mitochondria was protected by accelerating III state respiration rate, improving ADP/O ratio and recovering the depressed respiration control rate. CONCLUSION H303 possessed protective effect on structural and functional injury of mitochondria induced by ISO.
Collapse
Affiliation(s)
- L Han
- Beijing Institute of Radiation Medicine, Beijing 100850, China
| | | |
Collapse
|
38
|
Abstract
Eight new sesquiterpenes, tubipolides A-G (1-7) and tubiporone (8) (novel carbon skeleton), and a known sesquiterpene, spirotubipolide, have been isolated from the Formosan stolonifer Tubipora musica. The structures of compounds 1-8 were determined by 1D and 2D NMR spectral analysis.
Collapse
Affiliation(s)
- C Y Duh
- Department of Marine Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | | | | | | |
Collapse
|
39
|
Ma XC, Yin TY, Chen KJ. [Relationship between coronary angiography and syndrome differentiation type of TCM]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:654-6. [PMID: 12575549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To understand the relationship between the coronary Angiography (CA) reflected degree of coronary artery lesion and the TCM Syndrome Differentiation-type (TCM-SDT). METHODS Patients TCM-SDT were differentiated adopting the standard of Syndrome Differentiation for coronary artery diseases revised in 1990, and the comparison of TCM-SDT with the findings in CA was carried out. RESULTS CA examination showed that 29 patients (39.73%) were of one-artery lesion, 9 patients (12.33%) two-artery lesion and 35 patients (47.95%) three-artery lesion; the stenosis degree of them were: 54 arteries were mild stenosis, 38 moderate stenosis and 31 severe stenosis; 29 arteries were completely occluded, the sum total of affected artery was 152 (69.41%), and the other 67 arteries (30.59%) had no lesion. TCM-SDT showed that all the 73 patients had secondary Excess Syndrome, among them 73 patients (100%) with blood stasis Syndrome, 39 patients (53.4%) with Phlegm-Turbid Syndrome, 16 (21.0%) with Qi-stagnation Syndrome and 7 (9.6%) with Cold condensation Syndrome. 63 patients (86.3%) with obvious primary Deficiency Syndrome, among them, 57 (78.1%) were Qi-Deficiency, 18 (24.7%) Yang-Deficiency, 28 (38.4%) Yin-Deficiency and 5 (6.8%) Yang collapse. All patients had blood stasis of various degrees, manifesting on tongue proper prominently. In the 80.8% patients who had angina pectoris, 74.0% had their mouth, lips and gum dark red, dark purple or light dark in color. The comparison between TCM-SDT and Blood-Stasis score revealed that patients of Cold condensation-blood stasis Syndrome and Yang collapse-blood stasis Syndrome were serious. Patients of Qi stagnation-blood stasis Syndrome and Yin Deficiency-blood stasis Syndrome were mild cases, while patients of Phlegm Turbid-blood stasis Syndrome and Qi Deficiency-blood stasis Syndrome were moderate severity cases. The number of affected artery in Cold condensation patients was the most, and in Yin-Deficiency patients was the least. The coronary artery stenosis degree in patients of Qi-stagnation and Yin-Deficiency were milder than in those of Yang-collapse and Yang-Deficiency patients. CONCLUSION The more the number of arterial lesion, the severer the degree of stenosis and the higher the blood stasis score, then the more serious the degree of stasis.
Collapse
Affiliation(s)
- X C Ma
- Xiyuan Hospital, China Academy of TCM, Beijing 100091
| | | | | |
Collapse
|
40
|
Xu H, Shi DZ, Chen KJ. [Effect of xiongshao capsule on vascular remodeling in porcine coronary balloon injury model]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:591-4. [PMID: 12575573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To study the effect of Xiongshao Capsule (XS) on vascular remodeling in porcine coronary balloon injury model. METHODS Restenosis model was established by oversized balloon injury at mid-region of the left anterior descending coronary artery. The effect of drugs on late lumen loss and vascular remodeling was evaluated with quantitative histological method by combining results from histopathological analysis and coronary arteriography. RESULTS Vascular remodeling explained (59 +/- 20)% of late lumen loss. All drugs significantly reduced late lumen loss 4 weeks after balloon injury (P < 0.05 or 0.01). Both low-dose and high-dose XS markedly reduced late lumen loss resulting from vascular remodeling, as compared with the control group (P < 0.05 and P < 0.01 respectively). CONCLUSION Vascular remodeling played an important role in late lumen stenosis after balloon injury of coronary artery. XS could significantly inhibit pathological vascular remodeling after balloon injury, thus reduce late lumen loss and prevent restenosis.
Collapse
Affiliation(s)
- H Xu
- Cardiovascular Division, Xiyuan Hospital, China Academy of TCM, Beijing 100091
| | | | | |
Collapse
|
41
|
Chen KJ, Chen SN, Kao LY, Ho CL, Chen TL, Lai CC, Wu SC. Ocular ischemic syndrome. Chang Gung Med J 2001; 24:483-91. [PMID: 11601190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
BACKGROUND The purpose of this study was to investigate the clinical features and management of ocular ischemic syndrome (OIS) and factors influencing its development. METHODS Ten patients (12 eyes) with OIS underwent detailed medical and ocular histories, complete ophthalmic evaluation including fluorescein angiography, internal carotid artery evaluation by duplex ultrasonography, and management. The following outcome measures were considered: visual acuity, anterior segment neovascularization, lens status, retinal and choroidal changes, and carotid artery stenosis or occlusion. RESULTS The mean age of the patients was 63 +/- 8 years. Presenting visual symptoms included gradual (82.5%) or sudden (17.5%) onset of vision loss. At initial visit, eyes with OIS had visual acuity less than or equal to counting fingers in 50%, iris neovascularization in 58%, and neovascular glaucoma in 42%. Initially associated systemic diseases in these patients included arterial hypertension (60%), diabetes mellitus (40%), coronary artery disease (20%), previous stroke (30%) and hemodialysis (10%). Complete occlusion or severe occlusion (70-99%) of the internal carotid artery was seen in 75% on the side of OIS. Panretinal photocoagulation did not prevent OIS from progressing but vitreous hemorrhage and rubeosis iris regressed. Carotid endarterectomy had some benefit in stabilizing or improving vision in patients with OIS. CONCLUSION OIS has a poor visual prognosis. It is imperative that the clinician be aware of the signs and symptoms of carotid disease in order to facilitate prompt diagnosis and appropriate referral, because OIS may be the presenting sign of serious ischemic cerebrovascular and ischemic heart disease.
Collapse
Affiliation(s)
- K J Chen
- Department of Ophthalmology, Chang Gung Memorial Hospital, 5, Fu-Hsing Street, Kweishan, Taoyuan 333, Taiwan, R.O.C
| | | | | | | | | | | | | |
Collapse
|
42
|
Han L, Chen KJ. [Protective effect of yixinkang capsule containing serum on oxygen stress damaged mitochondrial membrane potential in guinea-pig myocytes]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:441-4. [PMID: 12577441] [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: 04/20/2023]
Abstract
OBJECTIVE To explore the protective effect and mechanism of Yixinkang (H303) capsule, a composite preparation of Chinese herbal medicine for antagonizing myocardial ischemia, containing serum on oxygen stress damaged mitochondrial membrane potential (MMP) in guinea-pig myocytes. METHODS Myocyte damage was induced by incubating myocytes with hydroxy free radical (Fe2+/H2O2) generating system for 30-60 mins, then H303-containing serum was added in to observe the protective effect. MMP was detected by laser scanning confocal microscopy. RESULTS After oxygen stress, the cytochrome oxidase (CCO) activity and MMP in mitochondria significantly decreased. These changes could be significantly lessened by H303-containing serum, demonstrated as obviously increase of CCO activity and myocyte survival rate. H303-containing serum also showed a significant protective effect on membrane potential of myocytes. CONCLUSION Oxygen stress could cause decrease of MMP in myocytes and H303-containing serum could protect it to maintain the membrane stability of mitochondria.
Collapse
Affiliation(s)
- L Han
- Beijing Institute of Radiation Medicine, Beijing 100850
| | | |
Collapse
|
43
|
Zhang QH, Chen KJ. [Progress in research on PC-SPES anti-cancer agents in prostatic carcinoma in USA]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:295-9. [PMID: 12577362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
|
44
|
Chen KJ, Chen SN, Chen TL, Ho CL. Central areolar choroidal and retinal pigment epithelial dystrophy: a family report. Chang Gung Med J 2001; 24:120-4. [PMID: 11360402] [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: 04/16/2023]
Abstract
Central areolar choroidal and retinal pigment epithelial dystrophy (CACD) is a rare hereditary macular disease characterized by a bilateral, symmetric, and well-circumscribed solitary area in the macula with choroidal and retinal pigment epithelial atrophy. We report a family of CACD confirmed by both clinical presentation and hereditary pattern. Three members of the family were examined. They had noticed gradual visual deterioration with poor color discrimination since the fourth to fifth decades. All of them showed a bilaterally symmetric bull's-eye pattern of macular dystrophy with a sharp border of underlying large or middle choroidal vessels, which was unassociated with any surrounding lesions. Fluorescein angiography revealed a transmission window defect due to retinal pigment epithelial atrophy with remaining choriocapillaris intermingled with a hypofluorescent area of choriocapillaris atrophy. Electroretinography revealed a mild reduction in the photopic amplitude, while the scotopic response was normal. A normal electro-oculography was also noted. The family history indicated autosomal dominant inheritance. The loss of visual acuity was caused by progressive atrophy of both the retinal pigment epithelium and the choriocapillaris. It is important to detect CACD in the early stages, because this diagnosis can exert a considerable influence on a patient's subsequent life.
Collapse
Affiliation(s)
- K J Chen
- Department of Ophthalmology, Chang Gung Memorial Hospital, 5 Fu-Shin Street, Kweishan, Taoyuan, Taiwan, R.O.C
| | | | | | | |
Collapse
|
45
|
Huang X, Ren P, Chen KJ. [Effect of combination of Chinese herbal drugs on clinical bioavailability of ferulic acid in serum]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:7-9. [PMID: 12577367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To observe the effect of combination of Chinese herbal drugs on bioavailability of Ligusticum walichii (LW) derived ferulic acid (FA) in serum. METHODS Healthy volunteers were given LW decoction (1 g/kg), LW combined with Paeonia veitchii (PV, 1:1) decoction (2 g/kg) and Coronary Heart No. 2 (CH-II, 3 g/kg, containing LW 0.5 g/kg) once respectively. The serum FA concentration-time (c-t) curve was performed by HPLC using the method established by the authors, and the area under that curve (AUC) was calculated and compared. RESULTS The FA c-t curve in the three groups was double peak curve. As compared with the AUC in subjects who were administered LW decoction, the AUC in those taken LW + PV decoction was lower [(15734.88 +/- 7737.97) ng/(min.ml) vs (5717.92 +/- 6124.63) ng/(min.ml)], P < 0.05), while that in those taken CH-II was relatively higher [(8072.00 +/- 4424.31) ng/(min.ml), P > 0.05)]. CONCLUSION Combination of LW and PV could significantly lower the bioavailability of FA, but when LW was added in CH-II, the FA bioavailability was not affected.
Collapse
Affiliation(s)
- X Huang
- Department of Clinical Pharmacology of Chinese Drugs, Xijing Hospital, Fourth Military Medical University, Xi'an 710032
| | | | | |
Collapse
|
46
|
Lin JK, Chen KJ, Liu GY, Chu YR, Lin-Shiau SY. Nitration and hydroxylation of aromatic amino acid and guanine by the air pollutant peroxyacetyl nitrate. Chem Biol Interact 2000; 127:219-36. [PMID: 10967319 DOI: 10.1016/s0009-2797(00)00181-2] [Citation(s) in RCA: 16] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Peroxyacetyl nitrate (PAN) is a common gaseous photochemical compound in polluted air and cigarette smog. The toxicity of PAN has been found to depend on three pathways: (1) its oxidizing property that mimics peroxide or peroxynitrite; (2) its nitrating and hydroxylating properties similar to peroxynitrite; and (3) its acetylating property like acetic anhydride. The present investigations were intended to focus on the reactions of PAN with aromatic amino acids and guanine. When PAN interacted with tyrosine and guanine the major products were 3-nitrotyrosine, 3, 5-dinitrotyrosine, 8-hydroxyguanine and 8-nitroguanine. These compounds have been used as indicators for the presence of peroxynitrite in previous studies. When PAN interacted with phenylalanine, the products were 3-nitrotyrosine, 4-nitrophenylalanine, p-tyrosine, o-tyrosine and m-tyrosine. 5-Hydroxytryptophan is produced from the reaction of PAN with tryptophan. Furthermore, the formation of nitrated tyrosines was also found in the PAN-treated HL-60 cells. A high yield of dityrosine was formed when PAN and peroxynitrite were reacted with tyrosine, probably through free radical oxidation. We also found that peroxynitrite and PAN are similar in their oxidizing activity. From these findings, we suggest that peroxynitrite may be considered as the reactive intermediate of PAN.
Collapse
Affiliation(s)
- J K Lin
- Institute of Biochemistry, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-ai Road, Taipei, Taiwan, ROC.
| | | | | | | | | |
Collapse
|
47
|
Xie ML, Gu ZL, Chen KJ, Zhou WX, Guo CY. Effect of lipanthyl on mRNA expression of endothelin-1 and nitric-oxide synthase in atherosclerotic vessel wall in rabbits. Acta Pharmacol Sin 2000; 21:473-6. [PMID: 11324450] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
AIM To study the mechanism of regression of atherosclerosis (AS) by lipanthyl. METHODS Experimental atherosclerotic rabbits created by damaging the abdominal aortic endothelium and feeding with high fat diet for 8 wk were then treated with lipanthyl 15 mg.kg-1.d-1 for 16 wk. Expression of endothelin (ET)-1 mRNA and nitric oxide synthase (NOS) mRNA in atherosclerotic vessel wall was measured by in situ hybridization and reverse transcription polymerase chain reaction (RT-PCR), respectively. RESULTS After lipanthyl administration for 16 wk, ET-1 mRNA expression was reduced, and integral optical density (IOD) and area of hybridization granule were observed to be (49,113 +/- 16,868) and (2448 +/- 621) micron 2 in lipanthyl group and (65,188 +/- 10,113) and (3028 +/- 352) micron 2 in atherosclerotic group, respectively. Regarding inducible NOS mRNA expression, IOD and area were decreased by 25.5% and 53.3%, respectively, whereas endothelial NOS mRNA expression was increased. CONCLUSION Restoration of the disturbed ET-1 mRNA/NOS mRNA balance by lipanthyl might be one of its mechanisms leading to regression of atherosclerosis.
Collapse
Affiliation(s)
- M L Xie
- Department of Pharmacology, Suzhou Medical College, Suzhou 215007
| | | | | | | | | |
Collapse
|
48
|
Keshner EA, Hain TC, Chen KJ. Predicting control mechanisms for human head stabilization by altering the passive mechanics. J Vestib Res 2000; 9:423-34. [PMID: 10639027] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The purpose of this study was to clarify the mechanisms controlling head and neck stabilization in the horizontal (yaw) and vertical (pitch) planes by changing the passive mechanics of the head-neck motor system. Angular velocities of the head and trunk in space were recorded in seated subjects during external perturbations of the trunk with pseudorandom sum-of-sines (SSN) stimuli. Four subjects in yaw and nine subjects in pitch actively stabilized their heads in the dark, and performed a mental distraction task in the dark both with and without a weight atop the head. In yaw, the behavior of the head was found to change relatively little with added inertia. As adding inertia to a passive mechanical system should cause substantial changes in dynamics, we inferred that neural mechanisms were invoked to maintain the constant response dynamics. A mathematical model of head-neck control was applied to predict the relative influence of the vestibulocollic and cervicocollic reflexes, and of inertia, stiffness, and viscosity. Using optimization methods to fit the model to experimental data, we identified stiffness and vestibulocollic reflex gain as the primary contributors to the control of head stabilization in space. In pitch, increasing inertia accentuated phase shifts at higher frequencies. Because our pitch model was insufficiently constrained, we only simulated responses due to passive mechanics. Model simulation predicted unstable head motion at all test frequencies. Subjects were able to compensate for trunk motion at most frequencies, however, suggesting that neural components were modulated to exert compensatory responses both with and without additional weight.
Collapse
Affiliation(s)
- E A Keshner
- Sensory Motor Performance Program, Rehabilitation Institute of Chicago, IL 60611, USA.
| | | | | |
Collapse
|
49
|
Abstract
OBJECTIVE The purpose of this study was to investigate the therapeutic effects of tetramethylpyrazine, an alkaloid isolated from a Chinese herb Ligusticum wallichii Franch, on portal hypertensive rats. METHODS There were three groups of animals: partial portal vein ligated (PVL) rats, bile duct ligated (BDL) rats and sham-operated (Sham) rats. Each rat in every group was given only one of three treatment regimens: tetramethylpyrazine 30 or 50 mg/kg/12 h, or vehicle (0.2 N HCl, 0.7 ml/12 h). There were seven rats allocated to each regimen, with a total of 63 rats studied. Tetramethylpyrazine or vehicle was given via gastric gavage every 12 h for 8 days, starting just after PVL or 3 weeks after BDL, and haemodynamic parameters were measured thereafter. RESULTS Both PVL and BDL rats exhibited portal hypertensive and hyperdynamic state as compared with Sham rats. Eight-day tetramethylpyrazine treatment induced dose-dependent reductions of portal venous pressure (PVP), mean arterial pressure (MAP), and total peripheral resistance (TPR) in both PVL and BDL rats. Tetramethylpyrazine at 30 and 50 mg/kg/12 h induced PVP reduction by 10.2 and 16.1% in PVL rats, and 10.5 and 14.8% in BDL rats, respectively, as compared with the vehicle group. There were no significant changes of cardiac index or heart rate (HR) after tetramethylpyrazine treatment in either PVL or BDL rats. In the Sham rats, tetramethylpyrazine did not significantly change PVP, MAP, HR or TPR, despite a tendency of reduction. CONCLUSION Our results showed that 8-day treatment of tetramethylpyrazine induced reductions of both portal venous and systemic arterial pressure in portal hypertensive rats with and without cirrhosis. Overall, the therapeutic effects are neither outstandingly efficacious nor altogether beneficial.
Collapse
Affiliation(s)
- F C Chang
- Xiyuan Hospital and Institute of Geriatrics, China Academy of Traditional Chinese Medicine, Beijing, People's Republic of China
| | | | | | | | | |
Collapse
|
50
|
Afonso A, Weinstein J, Kelly J, Wolin R, Rosenblum SB, Connolly M, Guzi T, James L, Carr D, Patton R, Bishop WR, Kirshmeier P, Liu M, Heimark L, Chen KJ, Nomeir AA. Analogues of 1-(3,10-dibromo-8-chloro-6,11-dihydro-5H-benzo-[5,6]-cyclohepta [1,2-b]pyridin-11-yl)piperidine as inhibitors of farnesyl protein transferase. Bioorg Med Chem 1999; 7:1845-55. [PMID: 10530932 DOI: 10.1016/s0968-0896(99)00103-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of several 4-pyridylacetyl N-oxide derivatives of 4-(3-bromo-6,11-dihydro-5H-benzo[5,6]-cyclohepta[1,2-b]-pyridin-11-yl)pi perazine/piperidine 3 is described. This study was aimed at identifying fomesyl protein transferase (FPT) inhibitors in these two series of tricycles containing different phenyl ring substituents. The in vitro activity profile of the initial group of compounds 7a-7g led to the synthesis of the 8-methyl-10-methoxy and 8-methyl-10-bromo analogues 7i, 13i, and 13j. The 11R(-) enantiomers of these compounds were found to exhibit potent in vitro FPT inhibition activity.
Collapse
Affiliation(s)
- A Afonso
- Schering-Plough Research Institute, Kenilworth, NJ 07033, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|