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Yang B, Ji Q, Huang FZ, Li J, Tian YZ, Xue B, Zhu R, Wu H, Yang H, Yang YB, Tang S, Zhao HB, Cao Y, Du J, Wang BG, Zhang C, Wu D. Picosecond Spin Current Generation from Vicinal Metal-Antiferromagnetic Insulator Interfaces. Phys Rev Lett 2024; 132:176703. [PMID: 38728713 DOI: 10.1103/physrevlett.132.176703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 03/22/2024] [Indexed: 05/12/2024]
Abstract
We report the picosecond spin current generation from the interface between a heavy metal and a vicinal antiferromagnet insulator Cr_{2}O_{3} by laser pulses at room temperature and zero magnetic field. It is converted into a detectable terahertz emission in the heavy metal via the inverse spin Hall effect. The vicinal interfaces are apparently the source of the picosecond spin current, as evidenced by the proportional terahertz signals to the vicinal angle. We attribute the origin of the spin current to the transient magnetic moment generated by an interfacial nonlinear magnetic-dipole difference-frequency generation. We propose a model based on the in-plane inversion symmetry breaking to quantitatively explain the terahertz intensity with respect to the angles of the laser polarization and the film azimuth. Our work opens new opportunities in antiferromagnetic and ultrafast spintronics by considering symmetry breaking.
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Affiliation(s)
- B Yang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Qing Ji
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - F Z Huang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Jiacong Li
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Y Z Tian
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - B Xue
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Ruxian Zhu
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Hui Wu
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Hanyue Yang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Y B Yang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Shaolong Tang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - H B Zhao
- Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai 200433, People's Republic of China
| | - Y Cao
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - J Du
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - B G Wang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
| | - D Wu
- National Laboratory of Solid State Microstructures, Jiangsu Provincial Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
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Lan JP, Xue YF, Pu JY, Ding Y, Gan ZY, Yang YB, Wang ZT, Jie XL, Yang L. Plantaginis semen ameliorates diabetic kidney disease via targeting the sphingosine kinase 1/sphingosine-1-phosphate pathway. J Ethnopharmacol 2024; 331:118221. [PMID: 38677576 DOI: 10.1016/j.jep.2024.118221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/14/2024] [Accepted: 04/16/2024] [Indexed: 04/29/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Plantaginis Semen (PS) is widely utilized as a common herb in several Asian countries, particularly China, due to its diuretic, anti-hypertensive, anti-hyperlipidemic, and anti-hyperglycemic properties. Furthermore, it is acknowledged for its ability to mitigate renal complications associated with metabolic syndrome. Despite its extensive usage, there is limited systematic literature elucidating its therapeutic mechanisms, thus emphasizing the necessity for comprehensive investigations in this field. AIM This study aims to comprehensively evaluate the therapeutical potential of PS in treating diabetic kidney disease (DKD) and to elucidate the underlying mechanisms through in vivo and in vitro models. METHODS The main composition of PS were characterized using the UPLC-QTOF-MS method. For the in vivo investigation, a mouse model mediated by streptozocin (STZ) associated with a high-fat diet (HFD) and unilateral renal excision was established. The mice were split into 6 groups (n = 8): control group (CON group), DKD group, low-dose of Plantago asiatica L. seed extract group (PASE-L group, 3 g/kg/d), medium-dose of PASE group (PASE-M, 6 g/kg/d), high-dose of PASE group (PASE-H, 9 g/kg/d), and positive drug group (valsartan, VAS group, 12 mg/kg/d). After 8 weeks of treatment, the damage induced by DKD was evaluated by using relevant parameters of urine and blood. Furthermore, indicators of inflammation and factors associated with the SphK1-S1P signaling pathway were investigated. For the in vitro study, the cell line HBZY-1 was stimulated by high glucose (HG), they were then co-cultured with different concentrations of PASE, and the corresponding associated inflammatory and sphingosine kinase 1/sphingosine-1-phosphate (SphK1-S1P) factors were examined. RESULTS A total of 59 major components in PS were identified, including flavonoids, iridoids, phenylethanol glycosides, guanidine derivatives, and fatty acids. In the mouse model, PS was found to significantly improve body weight, decrease fasting blood glucose (FBG) levels, increased glucose tolerance and insulin tolerance, improved kidney-related markers compared to the DKD group, pathological changes in the kidneys also improved dramatically. These effects showed a dose-dependent relationship, with higher PASE concentrations yielding significantly better outcomes than lower concentrations. However, the effects of the low PASE concentration were not evident for some indicators. In the cellular model, the high dose of PASE suppressed high glucose (HG) stimulated renal mesangial cell proliferation, suppressed inflammatory factors and NF-κB, and decreased the levels of fibrillin-1(FN-1) and collagen IV(ColIV). CONCLUSION Our results indicate that PS exerts favorable therapeutic effects on DKD, with the possible mechanisms including the inhibition of inflammatory pathways, suppression of mRNA levels and protein expressions of SphK1 and S1P, consequently leading to reduced overexpression of FN-1 and ColIV, thereby warranting further exploration.
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Affiliation(s)
- Ji-Ping Lan
- School of Integrative Medicine Shanghai University of Traditional Chinese Medicine (SHUTCM), Shanghai, 201203, China; Shanghai R&D Center for Standardization of Chinese Medicines, Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Ya-Fu Xue
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Jia-Ying Pu
- Shanghai R&D Center for Standardization of Chinese Medicines, Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Yan Ding
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Zhong-Yuan Gan
- School of Integrative Medicine Shanghai University of Traditional Chinese Medicine (SHUTCM), Shanghai, 201203, China
| | - Ying-Bo Yang
- Shanghai R&D Center for Standardization of Chinese Medicines, Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China; Jiangsu Kanion Pharmaceutical Co., Ltd., Lianyungang, 222001, China
| | - Zheng-Tao Wang
- Shanghai R&D Center for Standardization of Chinese Medicines, Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Xiao-Lu Jie
- The Affiliated Hospital of Hangzhou Normal University, Hangzhou, 310014, China.
| | - Li Yang
- Shanghai R&D Center for Standardization of Chinese Medicines, Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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Wang K, Liu P, Wang SF, Zhang JY, Hu ZZ, Mei YQ, Yang YB, Wang ZT, Yang L. [Quality evaluation of Compound Cheqian Tablets based on UPLC-Q-TOF-MS/MS, network pharmacology and "double external standards" QAMS]. Zhongguo Zhong Yao Za Zhi 2023; 48:4675-4685. [PMID: 37802806 DOI: 10.19540/j.cnki.cjcmm.20230605.302] [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: 10/08/2023]
Abstract
The Compound Cheqian Tablets are derived from Cheqian Power in Comprehensive Recording of Divine Assistance, and they are made by modern technology with the combination of Plantago asiatica and Coptis chinensis. To investigate the material basis of Compound Cheqian Tablets in the treatment of diabetic nephropathy, in this study, the chemical components of Compound Cheqian Tablets were characterized and analyzed by UPLC-Q-TOF-MS/MS, and a total of 48 chemical components were identified. The identified chemical compounds were analyzed by network pharmacology. By validating with previous literature, six bioactive compounds including acteoside, isoacteoside, coptisine, magnoflorine, palmatine, and berberine were confirmed as the index components for qua-lity evaluation. Furthermore, the content of the six components in the Compound Cheqian Tablets was determined by the "double external standards" quantitative analysis of multi-components by single marker(QAMS), and the relative correction factor of isoacteoside was calculated as 1.118 by using acteoside as the control; the relative correction factors of magnoflorine, palmatine, and berberine were calculated as 0.729, 1.065, and 1.126, respectively, by using coptisine as the control, indicating that the established method had excellent stability under different conditions. The results obtained by the "double external standards" QAMS approximated those obtained by the external standard method. This study qualitatively characterized the chemical components in the Compound Cheqian Tablets by applying UPLC-Q-TOF-MS/MS and screened the pharmacodynamic substance basis for the treatment of diabetic nephropathy via network pharmacology, and primary pharmacodynamic substance groups were quantitatively analyzed by the "double external stan-dards" QAMS method, which provided a scientific basis for clarifying the pharmacodynamic substance basis and quality control of Compound Cheqian Tablets.
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Affiliation(s)
- Kang Wang
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Shanghai R&D Centre for Standardization of Chinese Medicines Shanghai 201203, China Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Pei Liu
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China School of Pharmacy,Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Si-Fan Wang
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Jie-Yu Zhang
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Zhi-Zhi Hu
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Yu-Qi Mei
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Ying-Bo Yang
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
| | - Zheng-Tao Wang
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Shanghai R&D Centre for Standardization of Chinese Medicines Shanghai 201203, China
| | - Li Yang
- the MOE Key Laboratory for Standardization of Chinese Medicines and SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Shanghai R&D Centre for Standardization of Chinese Medicines Shanghai 201203, China Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China
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Gao X, Yang YB, Wang AQ, Zhang XC, Zhu XL, Yin ZX, Wu J. [The sleep condition and its association with cognitive function of the elderly in six provinces of China]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:522-527. [PMID: 37032162 DOI: 10.3760/cma.j.cn112150-20220520-00511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
Objective: To analyze the association between sleep duration and cognitive function of the elderly in six provinces of China. Methods: Based on the cross-sectional survey data of the elderly from the Healthy Ageing Assessment Cohort Study in 2019, 4 644 participants' sociodemographic and economic indicators, lifestyle, prevalence of major chronic diseases, and sleep status, including night-time sleep duration, daytime sleep duration and insomnia, were collected by questionnaires. Cognitive function was evaluated by the Mini-Mental State Examination. Multivariate logistic regression was used to analyze the association between night-time sleep duration, daytime sleep duration and cognitive function. Results: The mean age of 4 644 respondents was (72.3±5.7) years, and 2 111 of them were males (45.5%). The mean total daily sleep time of the elderly was (7.9±1.9) hours, and the proportion of those who slept less than 7.0, 7.0-8.9 and≥9.0 hours was 24.1% (1 119), 42.1% (1 954) and 33.8% (1 571), respectively. The mean sleep time at night was (6.9±1.7) hours. About 23.7% (1 102) of the elderly did not sleep during the day, and the mean duration of the elderly who slept during the day was (78±51) minutes. Among the elderly with insomnia, 47.9% were still satisfied with their sleep quality. The mean value of MMSE score of 4 644 respondents was (24.5±5.3), and the cognitive impairment rate was 28.3% (1 316). The results of multivariate logistic regression model analysis showed that the OR (95%CI) value of the risk of cognitive impairment in older people who did not sleep, slept for 31 to 60 minutes and slept more than one hour was 1.473 (1.139 to 1.904), 1.277 (1.001 to 1.629) and 1.496 (1.160 to 1.928), respectively, compared with those who slept for 1 to 30 minutes during the daytime. Compared with those who slept for 7.0‒8.9 hours at night, the OR (95%CI) value of the risk of cognitive impairment in older people who slept more than 9.0 hours was 1.239 (1.011 to 1.519). Conclusion: The cognitive function is related to sleep duration in the Chinese elderly.
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Affiliation(s)
- X Gao
- Office of NCD and Ageing Health Management, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Y B Yang
- Office of NCD and Ageing Health Management, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - A Q Wang
- Office of NCD and Ageing Health Management, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X C Zhang
- Office of NCD and Ageing Health Management, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X L Zhu
- Office of NCD and Ageing Health Management, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z X Yin
- Office of NCD and Ageing Health Management, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - J Wu
- Chronic Noncommunicable Diseases Prevention and Control Center, Chinese Center for Disease Control and Prevention, Beijing 100050, China
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Zheng YB, Zeng N, Yuan K, Tian SS, Yang YB, Gao N, Chen X, Zhang AY, Kondratiuk AL, Shi PP, Zhang F, Sun J, Yue JL, Lin X, Shi L, Lalvani A, Shi J, Bao YP, Lu L. Prevalence and risk factor for long COVID in children and adolescents: A meta-analysis and systematic review. J Infect Public Health 2023; 16:660-672. [PMID: 36931142 PMCID: PMC9990879 DOI: 10.1016/j.jiph.2023.03.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 01/09/2023] [Accepted: 03/05/2023] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND Millions of COVID-19 pediatric survivors are facing the risk of long COVID after recovery from acute COVID-19. The primary objective of this study was to systematically review the available literature and determine the pooled prevalence of, and risk factors for long COVID among the pediatric survivors. METHODS Studies that assessed the prevalence of, or risk factors associated with long COVID among pediatric COVID-19 survivors were systematically searched in PubMed, Embase, and Cochrane Library up to December 11th, 2022. Random effects model was performed to estimate the pooled prevalence of long COVID among pediatric COVID-19 patients. Subgroup analyses and meta-regression on the estimated prevalence of long COVID were performed by stratification with follow-up duration, mean age, sex ratio, percentage of multisystem inflammatory syndrome, hospitalization rate at baseline, and percentage of severe illness. RESULTS Based on 40 studies with 12,424 individuals, the pooled prevalence of any long COVID was 23.36 % ([95 % CI 15.27-32.53]). The generalized symptom (19.57 %, [95 % CI 9.85-31.52]) was reported most commonly, followed by respiratory (14.76 %, [95 % CI 7.22-24.27]), neurologic (13.51 %, [95 % CI 6.52-22.40]), and psychiatric (12.30 %, [95% CI 5.38-21.37]). Dyspnea (22.75 %, [95% CI 9.38-39.54]), fatigue (20.22 %, [95% CI 9.19-34.09]), and headache (15.88 %, [95 % CI 6.85-27.57]) were most widely reported specific symptoms. The prevalence of any symptom during 3-6, 6-12, and> 12 months were 26.41 % ([95 % CI 14.33-40.59]), 20.64 % ([95 % CI 17.06-24.46]), and 14.89 % ([95 % CI 6.09-26.51]), respectively. Individuals with aged over ten years, multisystem inflammatory syndrome, or had severe clinical symptoms exhibited higher prevalence of long COVID in multi-systems. Factors such as older age, female, poor physical or mental health, or had severe infection or more symptoms were more likely to have long COVID in pediatric survivors. CONCLUSIONS Nearly one quarter of pediatric survivors suffered multisystem long COVID, even at 1 year after infection. Ongoing monitoring, comprehensive prevention and intervention is warranted for pediatric survivors, especially for individuals with high risk factors.
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Affiliation(s)
- Yong-Bo Zheng
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China; Peking-Tsinghua Centre for Life Sciences and PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, China
| | - Na Zeng
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China; School of Public Health, Peking University, Beijing, China; Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Kai Yuan
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China
| | - Shan-Shan Tian
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China
| | - Ying-Bo Yang
- The First Affiliated Hospital of Xinxiang Medical University, Henan, China
| | - Nan Gao
- The First Affiliated Hospital of Xinxiang Medical University, Henan, China
| | - Xuan Chen
- The First Affiliated Hospital of Xinxiang Medical University, Henan, China
| | - An-Yi Zhang
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China
| | - Alexandra L Kondratiuk
- NIHR Health Protection Research Unit in Respiratory Infections, National Heart and Lung Institute, Imperial College, London W2 1NY, UK
| | - Pei-Pei Shi
- Department of Neurology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, China
| | - Fang Zhang
- Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing, China
| | - Jie Sun
- Pain Medicine Center, Peking University Third Hospital, Beijing, China
| | - Jing-Li Yue
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China
| | - Xiao Lin
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China
| | - Le Shi
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China
| | - Ajit Lalvani
- NIHR Health Protection Research Unit in Respiratory Infections, National Heart and Lung Institute, Imperial College, London W2 1NY, UK
| | - Jie Shi
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China
| | - Yan-Ping Bao
- National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China; School of Public Health, Peking University, Beijing, China.
| | - Lin Lu
- Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Peking University, Beijing, China; Peking-Tsinghua Centre for Life Sciences and PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, China; National Institute on Drug Dependence and Beijing Key Laboratory of Drug Dependence, Peking University, Beijing, China.
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Qiu H, Song LX, Yang YB, Zhang SY, Han ZZ, Wang ZT, Yang L. Two new stilbenoid diglycosides from the stems of Dendrobium 'Sonia'. J Asian Nat Prod Res 2022; 25:1-7. [PMID: 35672871 DOI: 10.1080/10286020.2022.2081162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 02/18/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
Two undescribed stilbenoid diglycosides, dendrosonside A and dendrosonside B (1 and 2), were isolated from the stems of Dendrobium 'Sonia'. Their structures were elucidated based on 1 D/2D NMR and HRESIMS. The glycosyls contained in the two isolates were determined as D-glucose by acid hydrolysis and GC-MS analyses. In addition, 1 and 2 were further tested for the inhibition of nitric oxide production.
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Affiliation(s)
- Hao Qiu
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Lei-Xin Song
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Ying-Bo Yang
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Si-Yu Zhang
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zhu-Zhen Han
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zheng-Tao Wang
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Li Yang
- The MOE Key Laboratory of Standardization of Chinese Medicines and the SATCM Key laboratory of New Resources and Quality Evaluation of Chinses Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
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Zheng XQ, Song LX, Han ZZ, Yang YB, Zhang Y, Gu LH, Yang L, Chou GX, Wang ZT. Pentacyclic triterpenoids from spikes of Prunella vulgaris L. with thyroid tumour cell cytostatic bioactivities. Nat Prod Res 2022; 37:1518-1526. [PMID: 35038938 DOI: 10.1080/14786419.2021.2024532] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 01/03/2023]
Abstract
Five new triterpenoids, including four ursane types (1-4) and one oleanane type (5), together with 15 known ursane types pentacyclic triterpenoids (6-20) were isolated from the fruit spikes of Prunella vulgaris L., a traditional Chinese herbal medicine. Their structures were elucidated based on IR, HR-ESI-MS, and NMR spectroscopic data. The SW579 cell line was used to evaluate anti-thyroid cancer activities of (1-20). The results indicated that (7-9), (16), and (19) exhibited apparent inhibitory activity with IC50 values of 25.73-71.41 μM (cisplatin as positive control, IC50 14.49 ± 0.97 μM). Network pharmacology and molecular docking were also used for the prediction of the synergistic actions and the underlying mechanisms. Accordingly, four potential targets have been characterized.
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Affiliation(s)
- Xiu-Qin Zheng
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lei-Xin Song
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhu-Zhen Han
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Center for Standardization of Chinese Medicine, Shanghai, China
| | - Ying-Bo Yang
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yi Zhang
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li-Hua Gu
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Center for Standardization of Chinese Medicine, Shanghai, China
| | - Li Yang
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Center for Standardization of Chinese Medicine, Shanghai, China
| | - Gui-Xin Chou
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Center for Standardization of Chinese Medicine, Shanghai, China
| | - Zheng-Tao Wang
- Key Laboratory of Standardization of Chinese Medicines, Ministry of Education, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai R&D Center for Standardization of Chinese Medicine, Shanghai, China
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8
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Chen XP, Wei F, Zhang Q, Liu F, Yang YB, Zhang DH. [Single-center experience of robot-assisted laparoscopic nephron-sparing surgery for giant renal hamartoma]. Zhonghua Yi Xue Za Zhi 2021; 101:1991-1993. [PMID: 34225421 DOI: 10.3760/cma.j.cn112137-20201019-02865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The clinical data of 22 patients with giant renal hamartoma in Zhejiang Provincial People's Hospital who underwent robot-assisted laparoscopic nephron-sparing surgery from October 2014 to January 2020 were retrospectively analyzed. All the patients successfully completed the operation. The operation time and renal artery occlusion time was (179±34) min and (19.8±2.5) min, respectively. The intraoperative blood loss was (117±62) ml, and the postoperative hospital stay was (9.0±1.5) d. All cases were confirmed as renal angiomyolipoma by postoperative pathology. No urine leakage, postoperative bleeding and other complications occurred. Postoperative telephone follow-up was performed for 6 to 52 months, and no tumor recurrence on the surgical side was reported.
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Affiliation(s)
- X P Chen
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou 310000, China
| | - F Wei
- Graduate School of Bengbu Medical College, Bengbu 233000, China
| | - Q Zhang
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou 310000, China
| | - F Liu
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou 310000, China
| | - Y B Yang
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou 310000, China
| | - D H Zhang
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou 310000, China
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9
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Wang MX, Yang YB, Wang Y, Zhou F, Li M, Zhang B. [Correlation analysis between decreased cerebral perfusion measured from arterial spin labeling and cerebrovascular events in patients with bilateral moyamoya angiography]. Zhonghua Yi Xue Za Zhi 2021; 101:1778-1783. [PMID: 34167277 DOI: 10.3760/cma.j.cn112137-20201202-03252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the correlation between decreased cerebral perfusion measured from arterial spin labeling and cerebrovascular events in patients with bilateral moyamoya angiography (MMA). Methods: Twenty-seven consecutive cases with bilateral MMA, who were admitted to the neurosurgery department of Nanjing Drum Tower Hospital from April to November 2020, were included in this retrospective study. Among them, 10 were males and 17 were females, aged 35-66 (55±9) years. These patients all presented with unilateral cerebral hemisphere cerebral infarction or cerebral hemorrhage. The Wilcoxon paired signed-rank test was used to qualitatively analyze the differences in the Arterial Transit Artifact (ATA) of the bilateral cerebral hemispheres. The mean gray value, the kurtosis and skewness of gray distribution curve of bilateral cerebral hemispheres on cerebral blood flow (CBF) images with post labeling delay (PLD) of 1.5 s and 2.5 s were quantitative calculated. The relationship between ASL and cerebrovascular event was determined using binary logistics regression analysis. Results: No significant difference was observed in ATA between bilateral hemispheres on CBF images with PLDs of 1.5 s and 2.5 s (P>0.05). On the CBF images with a PLD of 1.5 s, the mean gray value of the cerebral hemisphere on the lesion side (17.50±5.88) was markly lower than that on the non-lesion side (20.80±5.51) (P<0.001), the kurtosis and skewness of gray distribution were significantly different between bilateral cerebral hemispheres (P<0.05);On the CBF images with a PLD of 2.5 s, the mean gray value and the skewness of the gray distribution on the lesion side of the cerebral hemisphere were statistically different from those on the non-lesion side (P<0.05), while the difference in kurtosis was not statistically significant between bilateral cerebral hemispheres (P>0.05). Multivariate regression analysis showed that the reduction of gray value on the side of the lesion was independently associated to the occurrence of the cerebrovascular events (ORPLD1.5=0.192, 95%CI:0.047-0.783;ORPLD2.5=0.175, 95%CI:0.050-0.615). Conclusion: The decreased perfusion detected by ASL is independently associated with cerebrovascular events in patients with MMA.
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Affiliation(s)
- M X Wang
- Department of Radiology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Y B Yang
- Department of Neurosurgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Y Wang
- Department of Neurosurgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - F Zhou
- Department of Radiology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - M Li
- Department of Radiology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - B Zhang
- Department of Radiology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, China
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Liu RL, Yang YB, Lee BR, Liu G, Zhang WG, Chen XY, Song XJ, Kang JQ, Zhu ZH. The dispersal-related traits of an invasive plant Galinsoga quadriradiata correlate with elevation during range expansion into mountain ranges. AoB Plants 2021; 13:plab008. [PMID: 34194688 PMCID: PMC8237851 DOI: 10.1093/aobpla/plab008] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Detecting shifts in trait values among populations of an invasive plant is important for assessing invasion risks and predicting future spread. Although a growing number of studies suggest that the dispersal propensity of invasive plants increases during range expansion, there has been relatively little attention paid to dispersal patterns along elevational gradients. In this study, we tested the differentiation of dispersal-related traits in an invasive plant, Galinsoga quadriradiata, across populations at different elevations in the Qinling and Bashan Mountains in central China. Seed mass-area ratio (MAR), an important seed dispersal-related trait, of 45 populations from along an elevational gradient was measured, and genetic variation of 23 populations was quantified using inter-simple sequence repeat (ISSR) markers. Individuals from four populations were then planted in a greenhouse to compare their performance under shared conditions. Changing patterns of seed dispersal-related traits and populations genetic diversity along elevation were tested using linear regression. Mass-area ratio of G. quadriradiata increased, while genetic diversity decreased with elevation in the field survey. In the greenhouse, populations of G. quadriradiata sourced from different elevations showed a difference response of MAR. These results suggest that although rapid evolution may contribute to the range expansion of G. quadriradiata in mountain ranges, dispersal-related traits will also likely be affected by phenotypic plasticity. This challenges the common argument that dispersal ability of invasive plants increases along dispersal routes. Furthermore, our results suggest that high-altitude populations would be more effective at seed dispersal once they continue to expand their range downslope on the other side. Our experiment provides novel evidence that the spread of these high-altitude populations may be more likely than previously theorized and that they should thus be cautiously monitored.
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Affiliation(s)
- Rui-Ling Liu
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Ying-Bo Yang
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Benjamin R Lee
- School for Environment and Sustainability, University of Michigan, Ann Arbor, MI 48109, USA
| | - Gang Liu
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Wen-Gang Zhang
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Xiao-Yan Chen
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Xing-Jiang Song
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Ju-Qing Kang
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
| | - Zhi-Hong Zhu
- College of Life Sciences, Shaanxi Normal University, 710119 Xi’an, People’s Republic of China
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11
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Liu G, Liu RL, Zhang WG, Yang YB, Bi XQ, Li MZ, Chen XY, Nie H, Zhu ZH. Arbuscular mycorrhizal colonization rate of an exotic plant, Galinsoga quadriradiata, in mountain ranges changes with altitude. Mycorrhiza 2021; 31:161-171. [PMID: 33559745 DOI: 10.1007/s00572-020-01009-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 11/26/2020] [Indexed: 05/09/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) are suggested to be important for invasions by many exotic plants. However, it is not yet known how associations between AMF and invasive plant populations change in mountains ranges and how changed associations affect further expansion of different populations in new habitats. We conducted a field survey to detect AMF colonization rate of the invasive Galinsoga quadriradiata along an elevational gradient ranging from 223 to 1947 masl in the Qinling and Bashan Mountains, China. Additionally, a greenhouse experiment was conducted to compare plant growth performance among five elevational populations. In the field, total plant mass and seed production, as well as root AMF colonization rate, significantly decreased with elevation. When populations were grown in a novel soil environment in the greenhouse, the high-altitude populations achieved higher seed and total mass at lower AMF colonization rate than the low-altitude populations. Moreover, high AMF association was related to high intraspecific competition within low-altitude populations and limited seed production. Our results revealed that the associations between AMF and G. quadriradiata decrease with altitude in mountain ranges, and this may indicate that differentiation of association between AMF and elevational populations occurs during range expansion of G. quadriradiata. The results of the greenhouse experiment suggest that the high-altitude populations are more aggressive than the low-altitude populations in a non-stressful environment.
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Affiliation(s)
- Gang Liu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China.
| | - Rui-Ling Liu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Wen-Gang Zhang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Ying-Bo Yang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Xiao-Qiong Bi
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Ming-Zhu Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Xiao-Yan Chen
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Hua Nie
- School of Mathematics and Information Science, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
| | - Zhi-Hong Zhu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, China
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Bai J, Dong ZH, Lei Y, Yang YB, Jia XP, Li JY. Association Analysis Between Polymorphism of Gonadotrophin Releasing Hormone Genes and Growth Traits of Quail (Coturnix Coturnix). Braz J Poult Sci 2021. [DOI: 10.1590/1806-9061-2020-1314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- J Bai
- Henan University of Science and Technology, China; Henan University of Science and Technology, China
| | - ZH Dong
- Henan University of Science and Technology, China
| | - Y Lei
- Henan University of Science and Technology, China
| | - YB Yang
- Henan University of Science and Technology, China
| | - XP Jia
- Henan University of Science and Technology, China
| | - JY Li
- Henan University of Science and Technology, China
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13
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Yang YB, Goshtasebi A, van Lierop AH, Kalidasan D, Hitchcock CL, Prior JC. Effects of progesterone therapy on serum sclerostin levels in healthy menopausal women: a 3-month randomized, placebo-controlled clinical trial. Osteoporos Int 2020; 31:2243-2250. [PMID: 32564093 DOI: 10.1007/s00198-020-05505-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 06/15/2020] [Indexed: 10/24/2022]
Abstract
UNLABELLED Sclerostin, a natural hormone made in bone, suppresses bone formation. Sclerostin is also decreased by estrogen. Progesterone, estrogen's menstrual partner, stimulates bone formation. It is unclear whether progesterone influences sclerostin. This study showed that progesterone did not change sclerostin using serum remaining from a randomized progesterone hot flush therapy trial. INTRODUCTION Progesterone and sclerostin are both endogenous hormones acting through osteoblast-origin cells and promote or suppress bone formation, respectively. Estradiol suppresses sclerostin, but progesterone, its menstrual cycle partner hormone, has unclear sclerostin relationships. We postulated that progesterone therapy would influence serum sclerostin levels. METHODS We obtained sclerostin levels for an ethics-approved post hoc analysis. Fasting sclerostin was measured in all remaining sera from a previous 12-week randomized controlled trial (RCT) of oral micronized progesterone (progesterone) for menopausal (> 1 year after last flow) vasomotor symptoms (VMS). Women in the RCT took 300 mg progesterone at bedtime or placebo (1:1) in a trial showing progesterone significantly decreased VMS. RESULTS Participants were healthy menopausal, primarily Caucasian (91.2%) community-dwelling women (± SD), 55.2 ± 4.6 years old with BMI 24.9 ± 2.9 kg/m2. The baseline sclerostin level in 60 women was 28.41 ± 10.47 pmol/L. Baseline sclerostin was not correlated with the run-in VMS score (r = 0.143, P = 0.294). Paired baseline and 12-week RCT data for 52 women showed serum sclerostin levels did not change related to experimental therapy (P = 0.504). Changes in final sclerostin values adjusted for baseline were progesterone (- 1.07 ± 7.96 pmol/L) and placebo (- 2.64 ± 8.70 pmol/L). In observational data (n = 60), baseline sclerostin levels correlated with the General Framingham Cardiovascular (CVD) Risk score (r = - 0.398, P = 0.003) and self-reported health by SF-36 quality of life instrument (QoL, r = - 0.331, P = 0.016). CONCLUSION Physiological oral micronized progesterone did not stimulate nor suppress serum sclerostin levels based on post hoc analysis of RCT data. Exploratory results, however, showed sclerostin negatively correlated with CVD risk and QoL. ClinicalTrials.gov #NCT0146469.
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Affiliation(s)
- Y B Yang
- Department of Medicine, Division of Endocrinology, Centre for Menstrual Cycle and Ovulation Research (CeMCOR), University of British Columbia, Vancouver, British Columbia, Canada
| | - A Goshtasebi
- Department of Medicine, Division of Endocrinology, Centre for Menstrual Cycle and Ovulation Research (CeMCOR), University of British Columbia, Vancouver, British Columbia, Canada
| | - A H van Lierop
- Center for Bone Quality, Leiden University Medical Center, Leiden, The Netherlands
| | - D Kalidasan
- Department of Medicine, Division of Endocrinology, Centre for Menstrual Cycle and Ovulation Research (CeMCOR), University of British Columbia, Vancouver, British Columbia, Canada
| | - C L Hitchcock
- Department of Medicine, Division of Endocrinology, Centre for Menstrual Cycle and Ovulation Research (CeMCOR), University of British Columbia, Vancouver, British Columbia, Canada
| | - J C Prior
- Department of Medicine, Division of Endocrinology, Centre for Menstrual Cycle and Ovulation Research (CeMCOR), University of British Columbia, Vancouver, British Columbia, Canada.
- School of Population and Public Health, University of British Columbia, Vancouver, Canada.
- British Columbia Women's Health Research Institute, Vancouver, Canada.
- Department of Medicine, Division of Endocrinology and Metabolism, University of British Columbia, 2775 Laurel Street, Suite 4111, Vancouver, BC, V5Z 1M9, Canada.
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Xie RR, Yang YB, Jin P. Identification of a novel PYGM mutation in a McArdle disease patient misdiagnosed as hypokalemic periodic paralysis. J Endocrinol Invest 2020; 43:697-698. [PMID: 32100198 DOI: 10.1007/s40618-020-01202-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 02/17/2020] [Indexed: 10/24/2022]
Affiliation(s)
- R R Xie
- Department of Endocrinology, The Third Xiangya Hospital Central South University, Tongzipo Road, Hunan Province, 410007, Changsha, People's Republic of China
| | - Y B Yang
- Department of Endocrinology, The Third Xiangya Hospital Central South University, Tongzipo Road, Hunan Province, 410007, Changsha, People's Republic of China
| | - P Jin
- Department of Endocrinology, The Third Xiangya Hospital Central South University, Tongzipo Road, Hunan Province, 410007, Changsha, People's Republic of China.
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Zhao LW, Yin SQ, Yang YB, Wang LM, Yang J, Zheng SW, Jin J. [Risk factors associated with prolonged postoperative length of stay of patients with gastric cancer]. Zhonghua Zhong Liu Za Zhi 2020; 42:150-154. [PMID: 32135651 DOI: 10.3760/cma.j.issn.0253-3766.2020.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Objective: To investigate the risk factors of prolonged postoperative length of stay (LOS) in patients with gastric cancer. Methods: A retrospective study was performed on 2033 patients who underwent curative surgery in Department of Pancreatic-gastric, Cancer Hospital, Chinese Academy of Medical Sciences. Eightieth percentile of postoperative hospital stay for all patients was taken as the cutoff, the patients were divided into the normal group (1 532 patients) and the extended group (501 patients). Logistic regression model was used to determine the risk factors related to prolonged postoperative LOS in gastric cancer. Results: A total of 417 cases with postoperative complications were recruited in extended group. The five highest complications accounting for prolonged LOS were: abdominal infection in 69 cases (13.77%), pleural effusion in 60 cases (11.98%), anastomotic leakage in 43 cases (8.58%), poor wound healing in 34 cases (6.79%), and bleeding in 25 cases (4.99%). Logistic regression analysis showed that age (OR=1.348, P=0.013), surgical procedure (OR=2.712, P<0.001), extent of resection (OR=2.035, P<0.001), degree of incision healing(OR=4.867, P<0.001), and perioperative blood transfusion (OR=1.711, P<0.001) were independent risk factors for prolonged postoperative LOS. Conclusions: The most common complication associated with prolonged postoperative LOS for gastric cancer patients is abdominal infection. Age, surgical procedure, extent of resection, degree of incision healing, and perioperative blood transfusion are the independent risk factors for prolonged postoperative LOS.
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Affiliation(s)
- L W Zhao
- Department of Medical Affairs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S Q Yin
- Department of Medical Record, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y B Yang
- Department of Medical Affairs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L M Wang
- Department of Hepatobiliary Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Yang
- Department of Medical Affairs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S W Zheng
- Department of Medical Affairs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Jin
- Department of Medical Affairs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Li J, Wang RF, Zhou Y, Hu HJ, Yang YB, Yang L, Wang ZT. Dammarane-type triterpene oligoglycosides from the leaves and stems of Panax notoginseng and their antiinflammatory activities. J Ginseng Res 2019; 43:377-384. [PMID: 31308809 PMCID: PMC6606971 DOI: 10.1016/j.jgr.2017.11.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 09/22/2017] [Accepted: 11/16/2017] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Inflammation is widespread in the clinical pathology and closely associated to the progress of many diseases. Triterpenoid saponins as a key group of active ingredients in Panax notoginseng (Burk.) F.H. Chen were demonstrated to show antiinflammatory effects. However, the chemical structures of saponins in the leaves and stems of Panax notoginseng (PNLS) are still not fully clear. Herein, the isolation, purification and further evaluation of the antiinflammatory activity of dammarane-type triterpenoid saponins from PNLS were conducted. METHODS Silica gel and reversed-phase C8 column chromatography were used. Furthermore, preparative HPLC was used as a final purification technique to obtain minor saponins with high purities. MS, NMR experiments, and chemical methods were used in the structural identifications. The antiinflammatory activities of the isolated saponins were assessed by measuring the nitric oxide production in RAW 264.7 cells stimulated by lipopolysaccharides. Real-time reverse transcription polymerase chain reaction was used to measure the gene expressions of inflammation-related gene. RESULTS Eight new minor dammarane-type triterpene oligoglycosides, namely notoginsenosides LK1-LK8 (1-8) were obtained from PNLS, along with seven known ones. Among the isolated saponins, gypenoside IX significantly suppressed the nitric oxide production and inflammatory cytokines including tumor necrosis factor-α, interleukin 10, interferon-inducible protein 10 and interleukin-1β. CONCLUSION The eight saponins may enrich and expand the chemical library of saponins in Panax genus. Moreover, it is reported for the first time that gypenoside IX showed moderate antiinflammatory activity.
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Affiliation(s)
- Juan Li
- Department of Pharmacognosy, China Pharmaceutical University, Nanjing, China
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ru-Feng Wang
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yue Zhou
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hai-Jun Hu
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying-Bo Yang
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li Yang
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zheng-Tao Wang
- Department of Pharmacognosy, China Pharmaceutical University, Nanjing, China
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM, Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Liu C, Cheng RR, Han ZZ, Yang YB, Zhou Y, Yang L, Wang ZT. A new ionone derivative from the leaves of Picrasma quassioides. J Asian Nat Prod Res 2019; 21:652-658. [PMID: 29717884 DOI: 10.1080/10286020.2018.1464561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 04/10/2018] [Indexed: 06/08/2023]
Abstract
Nigakialcohol A (1), as unusual cyclization ionone derivative, together with eight known ones (2-9), were isolated from the leaves of Picrasma quassioides (D. Don) Benn (Simaroubaceae). Their structures were elucidated by extensive spectroscopic analyses and comparison with literature data. Compound 2 showed a weak inhibitory effect on NO production at non-cytotoxic concentration (100 μM) with inhibitory rate of 59%, and thus it should be regarded as potential anti-inflammatory agents.
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Affiliation(s)
- Chang Liu
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
| | - Rong-Rong Cheng
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
| | - Zhu-Zhen Han
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
| | - Ying-Bo Yang
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
| | - Yue Zhou
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
| | - Li Yang
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
| | - Zheng-Tao Wang
- a The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica , Shanghai University of Traditional Chinese Medicine , Shanghai 201203 , China
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Dai L, Fu H, Kang XZ, Yang YB, Zhou HT, Liang Z, Xiong HC, Lin Y, Chen KN. [A retrospective comparative study of continuous pumping for home enteral nutrition after esophagectomy]. Zhonghua Wai Ke Za Zhi 2018; 56:607-610. [PMID: 30107704 DOI: 10.3760/cma.j.issn.0529-5815.2018.08.011] [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 discuss the effect and safety of continuous pumping for home enteral nutrition after esophagectomy. Methods: The current study retrospectively analyzed the esophageal cancer patients who underwent transthoracic esophagectomy between January 2017 and November 2017 at First Department of Thoracic Surgery, Peking University Cancer Hospital and Institute. There were totally 108 cases, including 88 males and 20 females, with an average age of 62 years. The patients were divided into pump feeding group (n=56) and traditional tube feeding group (n=52). The postoperative short-term safety, weight maintenance, enteral nutrition tolerance and nutritional support complete rate of the 2 groups were compared by χ(2) test, Fisher exact test and t test, respectively. Results: Compared with traditional tube feeding group, the patient safety in pumping feeding group was significantly better, with complications within 2 months after discharge were 11/52 and 4/56 respectively (χ(2)=2.393, P=0.035); the weight maintenance was significantly better, the weight loss within 4 weeks after discharge were 3.90 kg and 0.13 kg, respectively (t=7.720, P=0.000); the general enteral complications were significantly lower (26/52 vs. 5/56, χ(2)=22.225, P=0.000), the nutritional support complete rate was significantly higher (23/52 vs. 55/56, χ(2)=39.167, P=0.000). Conclusions: Continuous pump feeding enteral nutrition support after discharge postoperatively could help improve patient safety after discharge, which is better for weight maintenance of the patients. Pump feeding could also enhance tolerability of tube feeding and ensure the effective accomplishment of nutritional support.
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Affiliation(s)
- L Dai
- First Department of Thoracic Surgery, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing 100142, China
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Li N, Liu Z, Li YP, Li N, Wang Q, Wu YX, Yang YB, Xu CY, Xu DQ. [Assessing the consistency of methods to measure travel behavior related to exposure to air pollution]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:608-614. [PMID: 29886682 DOI: 10.3760/cma.j.issn.0253-9624.2018.06.009] [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: 06/08/2023]
Abstract
Objective: To compare diary-reported trips and Global Positioning System (GPS) recording trips and identify the reasons for the discrepancies between two methods. Methods: The survey was conducted in Jiangning district in Nanjing city during July to September and November to December, 2015. Both the diary records and GPS method were used to investigate the travel behavior of 33 retired adults for 5 consecutive days. The GPS traces were display in Google Earth and then split into trips to compare with the diary records according to time and location. χ(2) test was used to analyze the influence of trip characteristics on misreporting rates of each method. Results: A total of 1 087 trips in the survey can be compared between the diary (n=909) and the GPS method (n=912). 7.3% (79/1 087) of the trips were only recorded by GPS method, and 11.8% (128/1 087) were only reported in the diary. Of the remaining 880 trips recorded by the both methods, 86.7% (763/880) matched each other, while 13.3% (117/880) did not. For the matched trips, the difference between the trip durations recorded by diary and GPS method was 2.0 (quartile was 6.0) minutes and the diary method overestimated about 25.0% trip durations when compared with the GPS method. The accuracy rates were 84.8%(903/1 065) and 86.9%(925/1 065) for diary and GPS method, respectively. Both methods were more likely to misreport the trip under 5 minutes. The misreporting rates of diary method for trips under 5 minutes were 6.8 times higher than trips over 30 minutes (21.7% vs 3.2%). The reporting accuracy was also significantly different among trips by different travel mode (P<0.05) for both methods, diary method had the lowest accuracy in reporting vehicles recorders (69.3%, 133/192), while GPS method was more accuracy in both biking (91.9%, 136/148) and vehicles recorders(89.6%, 172/192). The main reasons for misreporting by diary method were forgetting or unwilling to record and failing to record trips according to travel mode, while forgetting to carry GPS device, bad GPS signal and failing to locate the position were the main reasons for misreporting by GPS method. Conclusion: The majority of the trips reported in diary and GPS method are well consistent with each other. Both of the methods should be used simultaneously in the survey of time-activity pattern to improve the data quality.
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Affiliation(s)
- N Li
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
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Dai L, Fu H, Wang F, Guo R, Yang YB, Lin Y, Chen KN. [Analysis of relationship between (18)F-FDG PET/CT SUVmax of esophageal squamous cell carcinoma before treatment and postoperative survival]. Zhonghua Yi Xue Za Zhi 2018; 98:1707-1712. [PMID: 29925151 DOI: 10.3760/cma.j.issn.0376-2491.2018.21.017] [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 evaluate the value of (18)F-FDG PET/CT in predicting long-term survival of esophageal squamous cell carcinoma(ESCC) before initial treatment. Methods: A total of 167 ESCC patients were retrospectively analyzed who underwent surgery between January 2010 and December 2014 in prospective database of Peking University Cancer Hospital Thoracic Surgery Department One, all cases were included according to inclusion and exclusion criteria.The relationship between SUVmax of the primary tumor and patients' age, gender, tumor location, tumor differentiation, tumor regression grade as well as long term survival were compared. Results: The median follow-up time of the 167 cases was 46.9 months(ranging from 30.5 to 86.2 months), with 1 year and 3 years postoperatively being 95.1% and 68.4%, respectively.The SUVmax of the tumor was positively correlated with cT(P<0.01), cN(P=0.033), cTNM(P=0.002) and pTNM(P=0.003)of the tumor.Patients with SUVmax ≤6 obtained a survival significantly better compared with patients with SUVmax>6, the 3 years OS were 83.4 % vs 65.6% (P=0.02) , and DFS were 82.4% vs 55.4%(P=0.006), respectively.The multivariate regression analysis demonstrated that the SUVmax>6 before treatment was the independent prognostic factor for OS (HR=3, 95%CI 1.050-8.568) and DFS (HR=3.971, 95% CI 1.408-11.200) of the ESCC patients. Conclusions: The higher the (18)F-FDG PET/CT SUVmax of the ESCC primary tumor, the poorer survival of the patients. Therefore, SUVmax could be used as an indicator to predict long term survival of the ESCC patients before treatment.
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Affiliation(s)
- L Dai
- The First Department of Thoracic Surgery, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Peking University School of Oncology, Beijing 100142, China
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Liu G, Yang YB, Zhu ZH. Elevated nitrogen allows the weak invasive plant Galinsoga quadriradiata to become more vigorous with respect to inter-specific competition. Sci Rep 2018; 8:3136. [PMID: 29453340 PMCID: PMC5816611 DOI: 10.1038/s41598-018-21546-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/06/2018] [Indexed: 11/09/2022] Open
Abstract
Elevated nitrogen associated with global change is believed to promote the invasion of many vigorous exotic plants. However, it is unclear how a weak exotic plant will respond to elevated nitrogen in the future. In this study, the competitive outcome of a weak invasive plant (Galinsoga quadriradiata) and two non-invasive plants was detected. The plants were subjected to 3 types of culture (mixed, monoculture or one-plant), 2 levels of nitrogen (ambient or elevated at a rate of 2 g m-2 yr-1) and 2 levels of light (65% shade or full sunlight). The results showed that elevated nitrogen significantly promoted the growth of both the weak invader and the non-invasive plants in one-plant pots; however, growth promotion was not observed for the non-invasive species in the mixed culture pots. The presence of G. quadriradiata significantly inhibited the growth of the non-invasive plants, and a decreased negative species interaction was detected as a result of elevated nitrogen. Our results suggest that competitive interactions between G. quadriradiata and the non-invasive plants were altered by elevated nitrogen. It provides exceptional evidence that an initially weak invasive plant can become an aggressive invader through elevated nitrogen deposition.
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Affiliation(s)
- Gang Liu
- College of Life Sciences, Shaanxi Normal University, 710119, Xi'an, P.R. China
| | - Ying-Bo Yang
- College of Life Sciences, Shaanxi Normal University, 710119, Xi'an, P.R. China
| | - Zhi-Hong Zhu
- College of Life Sciences, Shaanxi Normal University, 710119, Xi'an, P.R. China.
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Zhang P, Zhang JZ, Wu LY, Niu HQ, Yang YB, Zhang XD. [Short-term outcome of sacral neuromodulation on refractory interstitial cystitis/pelvic pain syndrome]. Zhonghua Yi Xue Za Zhi 2016; 96:3875-3878. [PMID: 28057156 DOI: 10.3760/cma.j.issn.0376-2491.2016.48.005] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summarize the initial experiences of applying sacral neuromodulation (SNM) for refractory interstitial cystitis/pelvic pain syndrome (IC/PPS). Methods: From January 2013 to August 2016, 26 patients with refractory IC/PPS (including 5 males and 21 females) treated with SNM were recruited in Beijing Chaoyang Hospital and Hebei Yanda Hospital in this retrospective study. The data before operation, after implantation of stage Ⅰ tined lead, and during short-term follow-up after implantation of stage Ⅱ implanted pulse generator (IPG) were compared in order to observe the improvement of relevant symptoms, and to summarize the effectiveness and safety of SNM for IC/PPS. Results: All the 26 patients received stage Ⅰ tined lead implantation under local anesthesia, of whom 7 patients finally had the tined lead removed under local anesthesia because of poor testing effects. And 19 patients chose embedding of IPG at the end of stageⅠ, with the conversion rate from stage Ⅰto stage Ⅱ being 73.1%. The mean follow-up time after stage Ⅱ was 12.1 months. The data at the end of follow-up compared with those before treatment were: voiding frequency in 24 hours 24.3±9.6 vs 13.5±5.7, nocturia 4.6±2.2 vs 2.7±1.5, average voiding amount (109.4 ±45.3)vs(172.6±61.6) ml, O'leary-sant scale score 26.0±3.1 vs 17.0±3.8, quality of life (QOL) score 5.7±0.4 vs 3.3±1.3, sex rating 5.4±1.4 vs 2.9±1.6, and Numeric Pain Intensity Scale 8.4±1.7 vs 3.9±1.2 (all P<0.05). During the follow-up period for the 19 patients, 11 showed symptoms relieve without recurrence, 5 patients had slightly symptoms recurrence and 3 patients had severe recurrence of pelvic pain and frequent urination. About 42.1%(8/19) patients received reprogramming, the average reprogramming rate being 1.73/person. And 84.2% (16/19) patients had symptoms improvement greater than 50% after stage Ⅱ IPG implantation. Conclusions: SNM is an effective, safe and minimally invasive procedure for refractory IC/PPS. IC/PPS is a good indication for SNM with a high conversion rate from stage Ⅰ to stage Ⅱ. Patients should be followed up regularly after operation, and reprogramming should be arranged according to the degree of symptom improvement.
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Affiliation(s)
- P Zhang
- Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
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Song Z, Li ZH, Lei XQ, Xu TS, Zhang XH, Li YJ, Zhang GM, Xi SM, Yang YB, Wei ZG. Construction of the mammalian expressing vector pEGFP-N1-P53 and its expression successful in chicken fibroblast cells and blastoderm. Genet Mol Res 2015; 14:931-9. [PMID: 25730031 DOI: 10.4238/2015.february.2.16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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 enhanced green fluorescent protein (EGFP) pEGFP-N1-P53 eukaryotic expression vector, which contains the human tumor suppressor p53, was constructed and transfected into chicken fibroblast cells and stage-X blastoderm to analyze the transfection efficiency. The complementary DNA of the human p53 gene was cloned by reverse transcription-polymerase chain reaction from human peripheral blood and inserted into the pEGFP-N1 vector by HindIII and BamHI double digestion. The pEGFP-N1-P53 vector was transfected into chicken embryo fibroblasts by Lipofectamine 2000 liposomes, and the transfection efficiency was analyzed by fluorescence microscope after 36 h of transfection. The stage-X blastoderm was also transfected by blastoderm injection using Lipofectamine 2000 liposomes at room temperature after 12-24 h; then hatching occurred until seventh day, and the transfection efficiency was analyzed by fluorescence microscope in the dead embryo. A total of 90 hatching eggs were transfected by the pEGFP-N1-P53 vector, and 20 chicken embryos expressed the reporter gene, which indicated that recombinant pEGFP-N1-P53 could be transfected and expressed in stage-X blastoderm by liposomes. Chicken embryo fibroblasts were transfected and expressed the reporter gene. The pEGFP-N1-P53 vector was constructed successfully and could be transfected and expressed in chicken embryo fibroblasts and stage-X blastoderms efficiently.
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Affiliation(s)
- Z Song
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - Z H Li
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - X Q Lei
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - T S Xu
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - X H Zhang
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - Y J Li
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - G M Zhang
- The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, China
| | - S M Xi
- Institute of Medicine, Henan University of Science and Technology, Luoyang, Henan, China
| | - Y B Yang
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
| | - Z G Wei
- College of Animal Science, Henan University of Science and Technology, Luoyang, Henan, China
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Liu Q, Yang QM, Hu HJ, Yang L, Yang YB, Chou GX, Wang ZT. Bioactive diterpenoids and flavonoids from the aerial parts of Scoparia dulcis. J Nat Prod 2014; 77:1594-1600. [PMID: 24955889 DOI: 10.1021/np500150f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Six new diterpenoids, 4-epi-7α-O-acetylscoparic acid A (1), 7α-hydroxyscopadiol (2), 7α-O-acetyl-8,17β-epoxyscoparic acid A (3), neo-dulcinol (4), dulcinodal-13-one (5), and 4-epi-7α-hydroxydulcinodal-13-one (6), and a new flavonoid, dillenetin 3-O-(6″-O-p-coumaroyl)-β-D-glucopyranoside (10), along with 12 known compounds, were isolated from the aerial parts of Scoparia dulcis. The 7S absolute configuration of the new diterpenoids 1-4 and 6 was deduced by comparing their NOESY spectra with that of a known compound, (7S)-4-epi-7-hydroxyscoparic acid A (7), which was determined by the modified Mosher's method. The flavonoids scutellarein (11), hispidulin (12), apigenin (15), and luteolin (16) and the terpenoids 4-epi-scopadulcic acid B (9) and betulinic acid (19) showed more potent α-glucosidase inhibitory effects (with IC50 values in the range 13.7-132.5 μM) than the positive control, acarbose. In addition, compounds 1, 11, 12, 15, 16, and acerosin (17) exhibited peroxisome proliferator-activated receptor gamma (PPAR-γ) agonistic activity, with EC50 values ranging from 0.9 to 24.9 μM.
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Affiliation(s)
- Qing Liu
- The MOE Key Laboratory of Standardization of Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine , Shanghai 201210, People's Republic of China
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Liu Q, Hu HJ, Li PF, Yang YB, Wu LH, Chou GX, Wang ZT. Diterpenoids and phenylethanoid glycosides from the roots of Clerodendrum bungei and their inhibitory effects against angiotensin converting enzyme and α-glucosidase. Phytochemistry 2014; 103:196-202. [PMID: 24726372 DOI: 10.1016/j.phytochem.2014.02.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [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: 05/02/2013] [Revised: 02/13/2014] [Accepted: 02/18/2014] [Indexed: 06/03/2023]
Abstract
Abietane derivatives, bungnates A, B, 15-dehydrocyrtophyllone A and 15-dehydro-17-hydroxycyrtophyllone A, and two phenylethanoid glycosides, bunginoside A and 3″,4″-di-O-acetylmartynoside, together with nine known abietane derivatives and fourteen known phenylethanoid glycosides, were isolated from dried roots of Clerodendrum bungei. Their structures were determined on the basis of detailed spectroscopic analyses and acidic hydrolysis. The absolute configuration of bunginoside A was established from analysis of CD data. Selected compounds were evaluated for inhibitory effects against angiotensin converting enzyme (ACE) and α-glucosidase. 15-Dehydrocyrtophyllone A showed an ACE inhibitory effect, and verbascoside, leucosceptoside A and isoacteoside exhibited strong inhibitory capacity against α-glucosidase.
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Affiliation(s)
- Qing Liu
- The MOE Key Laboratory of Standardization of Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201210, China; Shanghai R&D Center for Standardization of Chinese Medicines, Shanghai 201203, China
| | - Hai-Jun Hu
- Department of Pharmacognosy, China Pharmaceutical University, Nanjing 210009, China
| | - Peng-Fei Li
- The MOE Key Laboratory of Standardization of Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201210, China
| | - Ying-Bo Yang
- The MOE Key Laboratory of Standardization of Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201210, China
| | - Li-Hong Wu
- Shanghai R&D Center for Standardization of Chinese Medicines, Shanghai 201203, China
| | - Gui-Xin Chou
- The MOE Key Laboratory of Standardization of Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201210, China; Shanghai R&D Center for Standardization of Chinese Medicines, Shanghai 201203, China
| | - Zheng-Tao Wang
- The MOE Key Laboratory of Standardization of Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201210, China; Shanghai R&D Center for Standardization of Chinese Medicines, Shanghai 201203, China.
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Abstract
The D-aminoacylase produced by Alcaligenes denitrificans DA181 was a new type of aminoacylase which had both high stereospecificity and specific activity. The molecular weight and isoelectric point of this enzyme were 58,000 and 4.4, respectively. The apparent Km and kcat values of this enzyme for N-acetyl-D-methionine were estimated to be 0.48 mM and 6.24 x 10(4) min-1, respectively. The optimum temperature was 45 degrees C. The enzyme was stable up to 55 degrees C for 1 hr in the presence of 0.2 mg/ml bovine serum albumin. The enzyme was stable in the pH range of 6.0 to 11.0 with an optimum pH of 7.5. This enzyme contained about 2.1 g atom of zinc per mole of enzyme. Enzyme activity was inhibited by incubation with EDTA. The inhibition by EDTA was fully reversed by Co2+ and partially by Zn2+.
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Affiliation(s)
- Y B Yang
- Institute of Biochemistry, National Yang-Ming Medical College, Taipei, Taiwan, R.O.C
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Yang KL, Lee SK, Lin CC, Jiang S, Chiu HM, Lin S, Chen YC, Jian YF, Yang SY, Yang YB, Chen SB, Shyr MH, Lin CL, Lin PY. Oriental HLA-A*11:90 detected in a Taiwanese cord blood sample and the haplotype in association with A*11:90 allele. Int J Immunogenet 2011; 38:543-6. [PMID: 21806781 DOI: 10.1111/j.1744-313x.2011.01031.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here an HLA-A allele, A*11:90, found in a Taiwanese cord blood sample using DNA sequence-based typing (SBT) protocol after observing an anomalous reaction pattern in a sequence-specific oligonucleotide (SSO) typing exercise. The sequence of A*11:90 is identical to A*11:01:01, the most predominant A*11 variant in Taiwanese, in exon 2 but differs from A*11:01:01 in exon 3 by two nucleotide substitutions at codon 163 (c.487C>G and c.488G>A), resulting R163E. In comparison with the sequence of A*11:02:01, the second most predominant subtype of A*11 in Taiwanese A*11:90 has one nucleotide difference at codon 19 (c.55A>G) in exon 2 resulting K19E and two nucleotides variations at codon 163 (c.487C>G and c.488G>A) in exon 3 resulting R163E. HLA-A*11:90-B*40:02-DRB1*11:01 is the deduced probable HLA haplotype in association with A*11:90. The generation of A*11:90 is thought to involve a DNA recombination event between alleles A*11:01:01 and A*80:01 where A*80:01 donated a fragment of the DNA sequence (from n.t. 487 to n.t. 497) to the recipient sequence of A*11:01:01.
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Affiliation(s)
- K L Yang
- Buddhist Tzu Chi General Hospital, Buddhist Compassion Relief Tzu Chi Foundation, Hualien, Taiwan.
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Abstract
The rising popularity of incineration of municipal solid waste (MSW) calls for detailed mathematical modelling and understanding of the incineration process. In this paper, governing equations for mass, momentum and heat transfer for both solid and gaseous phases in a moving bed in a solid-waste incineration furnace are described and relevant sub-models are presented. The burning rates of volatile hydrocarbons in the moving bed of solids are limited not only by the reaction kinetics but also the mixing of the volatile fuels with the under-fire air. The mixing rate is averaged across a computation cell and correlated to a number of parameters including local void fraction of the bed, gas velocity and a length scale comparable to the particle size in the bed. A correlation equation is also included to calculate the mixing in the freeboard area immediately next to the bed surface. A small-scale fixed bed waste incinerator was built and test runs were made in which total mass loss from the bed, temperature and gas composition at different locations along the bed height were measured. A 2-D bed-modelling program (FLIC) was developed which incorporates the various sub-process models and solves the governing equations for both gases and solids. Thermal and chemical processes are mainly confined within a layer about 5-9 times in thickness of the averaged particle size in the burning bed. For a large part of the burning process, the total mass loss rate was constant until the solid waste was totally dried out and a period of highly rising CO emission followed. The maximum bed temperature was around 1200 K. The whole burning process ended within 60 min. Big fluctuations in species concentration were observed due to channelling and subsequent 'catastrophic' changes in the local bed conditions. Reasonably good agreement between modelling and measurements has been achieved. Yet the modelling work is complicated by the channelling phenomenon in the bed. Numerical simulations without consideration of the channelling effect produced very good agreement with experiments concerning the total mass loss, but significant discrepancy exists for temperature and gas composition profiles. Transient phenomena such as the breaking of waste particles and the "catastrophic" creation of new burning channels occurring during waste incineration is a vital area requiring further investigation at the fundamental level. The underlying theory of bed behaviour must be extended to include these transient events.
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Affiliation(s)
- Y B Yang
- Sheffield University Waste Incineration Centre, Sheffield University, UK
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Triplett TL, Sgrignoli AR, Gao FB, Yang YB, Tai PC, Gierasch LM. Functional signal peptides bind a soluble N-terminal fragment of SecA and inhibit its ATPase activity. J Biol Chem 2001; 276:19648-55. [PMID: 11279006 DOI: 10.1074/jbc.m100098200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [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: 11/06/2022] Open
Abstract
The selective recognition of pre-secretory proteins by SecA is essential to the process of protein export from Escherichia coli, yet very little is known about the requirements for recognition and the mode of binding of precursors to SecA. The major reason for this is the lack of a soluble system suitable for biophysical study of the SecA-precursor complex. Complicating the development of such a system is the likelihood that SecA interacts with the precursor in a high affinity, productive manner only when it is activated by binding to membrane and SecYEG. A critical aspect of the precursor/SecA interaction is that it is regulated by various SecA ligands (nucleotide, lipid, SecYEG) to facilitate the release of the precursor, most likely in a stepwise fashion, for translocation. Several recent reports show that functions of SecA can be studied using separated domains. Using this approach, we have isolated a proteolytically generated N-terminal fragment of SecA, which is stably folded, has high ATPase activity, and represents an activated version of SecA. We report here that this fragment, termed SecA64, binds signal peptides with significantly higher affinity than does SecA. Moreover, the ATPase activity of SecA64 is inhibited by signal peptides to an extent that correlates with the ability of these signal peptides to inhibit either SecA translocation ATPase or in vitro protein translocation, arguing that the interaction with SecA64 is functionally significant. Thus, SecA64 offers a soluble, well defined system to study the mode of recognition of signal peptides by SecA and the regulation of signal peptide release.
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Affiliation(s)
- T L Triplett
- Departments of Biochemistry & Molecular Biology and Chemistry, University of Massachusetts, Amherst, Massachusetts 01003-4510, USA
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Li YR, Yang BF, Xu CQ, Zhou J, Yang YB, Zhang JY, Sun MZ. [Inhibition of transmembrane K(+) currents in mammalian ventricular myocytes by antiarrhythmic agent RP62719]. Sheng Li Xue Bao 2000; 52:427-30. [PMID: 11941400] [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: 02/24/2023]
Abstract
The effect of RP62719 on the inward rectifier K(+) current (I(K1)),transient outward K(+) current (I(to)) and delayed outward K(+) current (I(K)) in isolated cardiac myocytes was determined using the whole cell patch clamp technique in guinea pig and dog. RP62719 decreased I(K1) with an inhibitory concentration 50 (IC(50) ) of 5.0+/-1.0 micromol/L at -100 mV in guinea pig ventricular cells. In dog ventricular myocytes, RP62719 inhibited Ito by 84+/-4.4% with an IC(50) of 1.2+/-0.51 micromol/L at +40 mV. In guinea pig ventricular cells, RP62719 decreased I(K): I(Kstep) by 50.0+/-8.3%%and I(Ktail) by 56.0+/-4.9% at +40 mV, respectively. RP62719 inhibited I(Kstep) with an IC(50) of 4.2+/-0.8 micromol/L and I(Ktail) with an IC(50) of 3.3+/-0.75 micromol/L. Thus it is suggested that the ionic mechanism of antiarrhymic effect by RP62719 may be due to its inhibition of I(K1),I(to) and I(K).
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Affiliation(s)
- Y R Li
- Department of Physiology, Harbin Medical University, Harbin 150086, China
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32
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Yang YB, Lian J, Tai PC. Differential translocation of protein precursors across SecY-deficient membranes of Escherichia coli: SecY is not obligatorily required for translocation of certain secretory proteins in vitro. J Bacteriol 1997; 179:7386-93. [PMID: 9393703 PMCID: PMC179689 DOI: 10.1128/jb.179.23.7386-7393.1997] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [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: 02/05/2023] Open
Abstract
SecY, a component of the protein translocation system in Escherichia coli, was depleted at a nonpermissive temperature in a strain which had a temperature-sensitive polar effect on the expression of its secY. Membrane vesicles prepared from these cells, when grown at the nonpermissive temperature, contained about 5% SecY and similarly low levels of SecG. As expected, translocation of alkaline phosphatase precursors across these SecY-deficient membranes was severely impaired and appeared to be directly related to the decrease of SecY amounts. However, despite such a dramatic reduction in SecY and SecG levels, these membranes exhibited 50 to 70% of the wild-type translocation activity, including the processing of the signal peptide, of OmpA precursor (proOmpA). This translocation activity in SecY-deficient membranes was still SecA and ATP dependent and was not unique to proOmpA, as lipoprotein and lambda receptor protein precursors were also transported efficiently. Membranes that were reconstituted from these SecY-depleted membranes contained undetectable amounts of SecY yet were also shown to possess substantial translocation activity for proOmpA. These results indicate that the requirement of SecY for translocation is not obligatory for all secretory proteins and may depend on the nature of precursors. Consequently, it is unlikely that SecY is the essential core channel through which all precursors traverse across membranes; rather, SecY probably contributes to efficiency and specificity.
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Affiliation(s)
- Y B Yang
- Department of Biology, Georgia State University, Atlanta 30303, USA
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33
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Yang YB, Yu N, Tai PC. SecE-depleted membranes of Escherichia coli are active. SecE is not obligatorily required for the in vitro translocation of certain protein precursors. J Biol Chem 1997; 272:13660-5. [PMID: 9153216 DOI: 10.1074/jbc.272.21.13660] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [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: 02/04/2023] Open
Abstract
Membrane vesicles were prepared from Escherichia coli cells in which SecE was depleted to 2% of wild-type membranes. SecE depletion had pleiotropic effects; SecD, SecF, SecG, and SecY were decreased 4-6-fold, whereas SecA was increased about 16-fold over that of wild-type membranes. These membranes were substantially active in the in vitro translocation of proOmpA, which was mediated by the SecA pathway since it was inhibited by azide. Similar substantial translocation activities were observed for proLamB and proLpp in the SecE-depleted membranes. However, the translocation of proPhoA was more severely impaired. These data indicate that SecE may enhance but is not obligatorily required for the translocation of at least certain precursors, and suggest that the effects of the SecE depletion on protein translocation may be precursor-dependent.
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Affiliation(s)
- Y B Yang
- Department of Biology, Georgia State University, Atlanta, Georgia 30303, USA
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34
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Abstract
Immunoglobulins are often purified by affinity chromatography. However, this technique is costly, can result in poor resolution for subclasses (or is only group specific), and leads to possible leaching of contaminants into the purified products. Ion-exchange chromatography has shown great potential and has found an increased usage in the purification of immunoglobulins. The aim of this study is to further understand the separation mechanism with emphasis on the influence of column type and chromatographic conditions on the peak shape, selectivity and changes in the elution patterns. Included are strong cation-exchange, strong anion-exchange and weak anion-exchange columns. Five immunoglobulin G antibodies were used as test probes. Some sera and ascites were also used in the study. Among the chromatographic conditions examined were mobile phase pH, buffer type, buffer concentration, gradient rate, and column temperature. Significant differences in the chromatographic behavior (elution pattern, peak shape and selectivity) of the test samples are discussed in regard to the column type and the chromatographic conditions.
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Affiliation(s)
- Y B Yang
- Separations Group, Inc., Hesperia, CA 92345, USA
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35
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Yang YB, Hu HL, Chang MC, Li H, Tsai YC. Purification and characterization of L-aminoacylase from Alcaligenes denitrificans DA181. Biosci Biotechnol Biochem 1994; 58:204-5. [PMID: 7764515 DOI: 10.1271/bbb.58.204] [Citation(s) in RCA: 8] [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: 01/27/2023]
Abstract
The L-aminoacylase produced intracellularly by Alcaligenes denitrificans DA181 was purified to homogeneity. This enzyme had an apparent molecular weight of 80,000, and was composed of two subunits of identical molecular weight. Its isoelectric point was pH 5.1. The optimal reaction temperature and pH were 65 degrees C and 8.0, respectively. This enzyme showed specificity toward N-acetyl-derivative of hydrophobic L-amino acids with N-acetyl-L-valine as the favored substrate, followed by N-acetyl-L-alanine.
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Affiliation(s)
- Y B Yang
- Institute of Biochemistry, National Yang-Ming Medical College, Taipei, Taiwan, R.O.C
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36
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Abstract
Growth factors stimulate cellular protein synthesis, but the intracellular signaling mechanisms that regulate initiation of mRNA translation in neurons have not been clarified. A rate-limiting step in the initiation of protein synthesis is the formation of the ternary complex among GTP, eukaryotic initiation factor 2 (eIF-2), and the initiator tRNA. Here we report that genistein, a specific tyrosine kinase inhibitor, decreases tyrosine kinase activity and the content of phosphotyrosine proteins in cultured primary cortical neurons. Genistein inhibits protein synthesis by > 80% in a dose-dependent manner (10-80 micrograms/ml) and concurrently decreases ternary complex formation by 60%. At the doses investigated, genistein depresses tyrosine kinase activity and concomitantly stimulates PKC activity. We propose that a protein tyrosine kinase participates in the initiation of protein synthesis in neurons, by affecting the activity of eIF-2 directly or through a protein kinase cascade.
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Affiliation(s)
- B R Hu
- Laboratory for Experimental Brain Research, University of Lund, Lund Hospital, Sweden
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37
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Abstract
Stress, such as heat-shock, hypoxia and hypoglycemia, inhibits the initiation of protein synthesis. The effects of heat-shock on protein synthesis, eucaryotic initiation factor 2 (eIF-2) activity, protein kinase C (PKC), and casein kinase II (CKII) activities were studied in primary cortical neuronal cultures. In neurons exposed to heat-shock at 44 degrees C for 20 min, protein synthesis is inhibited by more than 80%, and is accompanied by a 60% decrease in eIF-2 activity. Steady state PKC and CK II activities were not affected by heat-shock. Vanadate (200 microM), a protein phosphotyrosine phosphatase inhibitor, partially prevented the depression of eIF-2 activity during heat-shock, and increased CKII activity by 90%. In contrast, staurosporine (62nM), a protein kinase C inhibitor, did not affect eIF-2 activity. We conclude that heat-shock causes a change in the phosphorylation/dephosphorylation of regulatory proteins leading to a depressed eIF-2 activity and protein synthesis in neurons.
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Affiliation(s)
- B R Hu
- Laboratory for Experimental Brain Research, Lund Hospital, Lund University, Sweden
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Abstract
The effects of acute hypoxia on intracranial dynamics were studied in six unanesthetized goats that were subjected to hypobaric hypoxia at a simulated 4,000-m high altitude for 2 h. Another six nonhypoxic goats served as control group for cerebral water content (CWC). In this study, we measured cerebral blood flow (CBF) by electromagnetic flowmeter, intracranial pressure (ICP) through an intraventricular catheter, and CWC by a wet-to-dry weight technique for a given volume of brain tissue. Intracranial compliance was calculated from a pressure-volume index derived from the change in intraventricular pressure after a subarachnoid injection of saline. During acute hypoxia CBF increased from 146.0 +/- 10.60 to 185.3 +/- 7.83 ml x min-1.100 g-1, ICP increased from 15.4 +/- 1.82 to 27.4 +/- 3.84 cmH2O, and CWC increased from 78.7 +/- 0.30 to 79.5 +/- 0.16%, but intracranial compliance decreased from 0.65 +/- 0.28 to 0.36 +/- 0.19 ml/cmH2O. The data suggest that acute hypoxia results in a significant disturbance of intracranial dynamics, which may be one of the important pathophysiological mechanisms of high-altitude cerebral edema and acute mountain sickness.
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Affiliation(s)
- Y B Yang
- Department of Pathophysiology, Third Military Medical College, Chongqing, People's Republic of China
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39
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Abstract
This paper describes synthetic procedures for preparing fimbriated stationary phases on poly(styrene-divinylbenzene) (PS-DVB) packing materials. The synthesis consists of a five-step procedure in which the order in which the steps are carried out may be varied. These steps are (i) polymerization of monomers to form an amphiphilic copolymer or oligomer, (ii) adsorption of either monomers, or polymer onto the PS-DVB surface, (iii) solvent induction of functional group orientation at the PS-DVB-polymer interface and polymer-water interface, (iv) a cross-linking reaction that forms a hydrophilic surface layer, and (v) derivatization of the surface layer with stationary phase.
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Affiliation(s)
- L Varady
- PerSeptive Biosystems, Cambridge, MA 02139
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40
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Yang YB, Wang ZG. [Progress in the study of circulating endothelial cells]. Sheng Li Ke Xue Jin Zhan 1993; 24:70-3. [PMID: 8332874] [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: 01/29/2023]
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41
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Yang YB, Harrison K, Carr D, Guiochon G. Factors affecting the separation and loading capacity of proteins in preparative gradient elution high-performance liquid chromatography. J Chromatogr A 1992; 590:35-47. [PMID: 1318319 DOI: 10.1016/0021-9673(92)87004-r] [Citation(s) in RCA: 9] [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: 12/26/2022]
Abstract
The optimum conditions for the purification of proteins by gradient elution in reversed-phase liquid chromatography were studied, with emphasis on the column length. Because of the strong dependence of the retention of proteins on the mobile phase composition, very short columns can be used successfully to perform analytical separations. A similar conclusion is extended to preparative separations. Columns with different lengths and diameters were used. The dependence of the loading capacity for touching band separation on the column length, diameter and volume was studied, in addition to the regeneration time between successive runs, the starting mobile phase composition and the necessary column efficiency.
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Affiliation(s)
- Y B Yang
- Vydac/Separations Group, Hesperia, CA 92345
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Abstract
A very hydrophilic high-performance liquid chromatographic base support was created from microparticulate, macroporous poly(styrene-divinylbenzene) beads. An organic monomer containing cross-linking functionalities was coated on the poly(styrene-divinylbenzene), followed by a catalyzed cross-linking reaction. The coatings formed contain only stable chemical bonds (e.g., C-C, C-O-C), and easily-derivatized hydroxyl moieties. This coated base support was evaluated for hydrophilicity, chemical stability, solvent compatibility, rigidity, and irreversible adsorption. Derivatives of the coated base support were made and applied in various modes of chromatography.
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Affiliation(s)
- Y B Yang
- Department of Biochemistry, Purdue University, West Lafayette, IN 47907
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43
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Abstract
A
d
-aminoacylase from
Alcaligenes faecalis
DA1 has been purified to homogeneity by a simple purification procedure with two columns, Fractogel DEAE-650 and HW-50. The specific activity of the purified enzyme was found to be 580 U/mg of protein with
N
-acetyl-
dl
-methionine as the reaction substrate. The apparent molecular weight and isoelectric point of this enzyme were determined to be 55,000 and 5.4, respectively.
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Affiliation(s)
- Y B Yang
- Institute of Biochemistry, National Yang-Ming Medical College, Taipei 11221, Taiwan, Republic of China
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Afeyan NB, Gordon NF, Mazsaroff I, Varady L, Fulton SP, Yang YB, Regnier FE. Flow-through particles for the high-performance liquid chromatographic separation of biomolecules: perfusion chromatography. J Chromatogr A 1990; 519:1-29. [PMID: 2077042 DOI: 10.1016/0021-9673(90)85132-f] [Citation(s) in RCA: 454] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This paper reports a new technique for reducing resistance to stagnant mobile phase mass transfer without sacrificing high adsorbent capacity or necessitating extremely high pressure operation. The technique involves the flow of liquid through a porous chromatographic particle, and has thus been termed "perfusion chromatography". This is accomplished with 6000-8000 A pores which transect the particle. Data from electron microscopy, column efficiency, frontal analysis and theoretical modelling all suggest that mobile phase will flow through these large pores. In this manner, solutes enter the interior of the particles through a combination of convective and diffusional transport, with convection dominating for Peclet numbers greater than one. The implications of flow through particles on bandspreading, resolution and dynamic loading capacity are examined. It is shown that the rate of solute transport is strongly coupled to mobile phase velocity such that bandspreading, resolution of proteins and dynamic loading capacity are unaffected by increases in mobile phase velocity up to several thousand centimeters per hour. The surface area of this very large-pore diameter material is enhanced by using a network of smaller, 500-1500 A interconnecting pores between the throughpores. Scanning electron micrographs show that the pore network is continuous and that no point in the matrix is more than 5000-10,000 A from a through-pore. As a consequence, diffusional path lengths are minimized and the large porous particles take on the transport characteristics of much smaller particles but with a fraction of the pressure drop. Capacity and resolution studies show that these materials bind and separate an amount of protein equivalent to that of conventional high-performance liquid chromatography as well as low performance agarose-based media at greater than 10-100 times higher mobile phase velocity with no loss in resolution.
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Affiliation(s)
- N B Afeyan
- PerSeptive Biosystems Inc., Cambridge, MA 02139
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Abstract
The substrate specificity of alkaline elastase Bacillus from alkalophilic Bacillus sp. Ya-B was investigated using oxidized insulin A- and B-chains. Under time-limited cleavage, the initial cleavage site of the enzyme on the oxidized insulin A-chain and B-chain was at the leucine13-tyrosine14 bond and the leucine15-tyrosine16 bond, respectively. When the cleavage was completed, three major cleavage sites and three minor cleavage sites on the A-chain, and five major cleavage sites and four minor cleavage sites on the B-chain were found. However, most of the peptides produced after complete hydrolysis of the A- or B-chain by the enzyme were composed of four to six amino acid residues. The results suggest that this enzyme cleaves the oxidized insulin A- and B-chains in a block-cutting manner.
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Affiliation(s)
- Y C Tsai
- Institute of Biochemistry, National Yang-Ming Medical College, Taipei, Taiwan
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Verzele M, Yang YB, Dewaele C, Berry V. Gradient reversed-phase liquid chromatography of proteins on very short columns. Influence of particle size on peak dispersion. Anal Chem 1988; 60:1329-32. [PMID: 3213949 DOI: 10.1021/ac00164a017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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47
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Yang YB, Verzele M. High-speed and high-performance size-exclusion chromatography of proteins on a new hydrophilic polystyrene-based resin. J Chromatogr A 1987; 391:383-93. [PMID: 3584334 DOI: 10.1016/s0021-9673(01)94340-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
High-performance size-exclusion chromatography of some standard proteins, peptides and amino acids on a new hydrophilic packing material obtained by chemical transformation of a cross-linked polystyrene-divinylbenzene copolymer was studied. Columns filled with 4 and 7 micron particles were compared. The influence of the concentration of acetonitrile, isopropanol and trifluoroacetic acid in the mobile phase on the chromatographic performance was investigated. A good linear calibration graph covering the molecular weight range from 200 to 700,000, was obtained under the optimal conditions. The packing material can be used for separations, for molecular weight determinations and for the pre-fractionation of proteins. The high rigidity of the packing material allows relatively high pressures to be used and therefore fast separations to be achieved. The packing material was applied to the chromatography of proteins from beer, bones and milk.
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Yang YB, Zhou J. [Studies on the xanthones of Veratrilla baillonii Franch. I. Structures of veratriloside and veratrilogenin (author's transl)]. Yao Xue Xue Bao 1980; 15:625-9. [PMID: 7257783] [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: 01/24/2023]
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