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Pan Y, Song LL, Gao Y, Zhou HH, Sui XL, Yu GH. [Radical dissection of lymph nodes with heterogenic tumors: analysis of 9 cases]. Zhonghua Bing Li Xue Za Zhi 2024; 53:71-73. [PMID: 38178750 DOI: 10.3760/cma.j.cn112151-20230906-00138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Affiliation(s)
- Y Pan
- School of Clinical Medicine, Weifang Medical University, Weifang 261000, China Department of Pathology, Yantai Yuhuangding Hospital, Yantai 264000, China
| | - L L Song
- The Second Medical College of Binzhou Medical University, Yantai 264003, China
| | - Y Gao
- Department of Pathology, Yantai Yuhuangding Hospital, Yantai 264000, China
| | - H H Zhou
- Department of Pathology, Yantai Yuhuangding Hospital, Yantai 264000, China
| | - X L Sui
- Department of Pathology, Yantai Yuhuangding Hospital, Yantai 264000, China
| | - G H Yu
- Department of Pathology, Yantai Yuhuangding Hospital, Yantai 264000, China
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2
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Gu RQ, Zheng CY, Zhang LF, Chen Z, Wang X, Cao X, Tian YX, Chen L, Zhou HH, Chen C, Hu Z, Song YX, Shao L, Tian Y, Wang ZW. [Prevalence of albuminuria and its association with cardiovascular diseases in Chinese residents aged over 35 years]. Zhonghua Nei Ke Za Zhi 2023; 62:290-296. [PMID: 36822855 DOI: 10.3760/cma.j.cn112138-20220328-00214] [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: 02/25/2023]
Abstract
Objective: To investigate the prevalence of albuminuria in Chinese residents aged >35 years and its potential association with cardiovascular disease (CVD). Methods: A total of 34 647 Chinese subjects aged ≥35 years were selected by stratified multi-stage random sampling from 2012 to 2015. Data were collected through questionnaires, physical examinations, and laboratory tests. Albuminuria was categorized into 3 types according to urinary albumin-to- creatinine ratio: normal (<30 mg/g), microalbuminuria (MAU, 30-300 mg/g), and macroalbuminuria (≥300 mg/g). Measurement data were expressed as x¯±s, and t-tests were used for comparisons between indicators. Qualitative data were expressed as rate or constituent ratio, and the χ2 test or Kruskal-Wallis test was used to examine differences. Logistic regression was used for multivariate analyses. SAS 9.4 software was used for statistical analyses, and P<0.05 was considered statistically significant. Results: The prevalence of abnormal albuminuria was 19.1%; the prevalence was 17.2% for MAU and lower in males (13.8%) than females (20.1%, P<0.01). The risk of CVD was higher among subjects with MAU (OR=1.23, 95%CI 1.12-1.35) and macroalbuminuria (OR=1.86, 95%CI 1.50-2.32). When MAU was complicated by hypertension and diabetes mellitus, the CVD risk was 1.76 times higher. Conclusions: The prevalence of MAU is high among Chinese subjects aged 35 years and over. Those with MAU have higher CVD risk, especially those with hypertension and diabetes mellitus.
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Affiliation(s)
- R Q Gu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - C Y Zheng
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - L F Zhang
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - Z Chen
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - X Wang
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - X Cao
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - Y X Tian
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - L Chen
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - H H Zhou
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - C Chen
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - Z Hu
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - Y X Song
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - L Shao
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - Y Tian
- Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
| | - Z W Wang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China Division of Prevention and Community Health, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College,National Center for Cardiovascular Diseases, Beijing 102308, China
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Wang X, Zhou HH, Chen Z, Zhang LF, Zheng CY, Tian Y, Shao L, Zhu ML, Wang ZW, Gao R. [Current status of hypertension prevalence, treatment and control rate among young and middle-aged population in China]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:1169-1176. [PMID: 36517437 DOI: 10.3760/cma.j.cn112148-20220916-00721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Objective: To estimate the prevalence, awareness, treatment and control rate of hypertension among young and middle-aged population in China. Methods: The analysis was based on the results of 2012-2015 China Hypertension Survey, which was a cross-sectional stratified multistage random sampling survey. A total of 229 593 subjects were included in the final analysis. The data including sex, age, living in urban and rural areas, prevalence of hypertension, history of stroke, family history of coronary heart disease and drinking, physical examination, heart rate were collected. Hypertension was defined as mean systolic blood pressure (SBP) ≥140 mmHg (1 mmHg=0.133 kPa), and (or) diastolic blood pressure (DBP) ≥90 mmHg, and (or) self-report a history of hypertension, and (or) use of antihypertensive medicine within 2 weeks before survey. Prehypertension was defined as SBP between 120-139 mmHg, and (or) DBP between 80-89 mmHg. Control of hypertension was considered for hypertensive individuals with SBP<140 mmHg and DBP<90 mmHg. The prevalence of prehypertension, hypertension, awareness, treatment, control rate were calculated, and the control rate among those with antihypertensive medication was also calculated. Results: The prevalence of prehypertension and hypertension was 43.8% (95%CI: 42.3%-45.4%), and 22.1% (95%CI: 20.8%-23.3%), respectively. The prevalence of prehypertension and hypertension was significantly higher among male than female across different age groups. The awareness, treatment, control rate of hypertension and control rate among treated hypertensive participants were 43.8%, 33.2%, 16.7%, and 40.2%, respectively. The prevalence was higher, and the control rate was lower among individuals with higher heart rate. Conclusion: The prevalence of prehypertension and hypertension among young and middle-aged population is high, the awareness, treatment and control rate need to be further improved in this population. The prevention and treatment of hypertension should be strengthened in the future to improve the control rate of hypertension in China.
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Affiliation(s)
- X Wang
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - H H Zhou
- Department of Biostatistics, School of Public Health, Peking University, Beijing 100083, China
| | - Z Chen
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - L F Zhang
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - C Y Zheng
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - Y Tian
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - L Shao
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - M L Zhu
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - Z W Wang
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
| | - Runlin Gao
- Department of Prevention and Community Health, National Center for Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Science, Beijing 100037, China
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Wang MY, Zhang CM, Zhou HH, Ge ZB, Su CC, Lou ZH, Zhang XY, Xu TT, Li SY, Zhu L, Zhou YL, Wu Y, Ji SR. Identification of a distal enhancer that determines the expression pattern of acute phase marker C-reactive protein. J Biol Chem 2022; 298:102160. [PMID: 35724961 PMCID: PMC9287136 DOI: 10.1016/j.jbc.2022.102160] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/09/2022] [Accepted: 06/11/2022] [Indexed: 11/18/2022] Open
Abstract
C-reactive protein (CRP) is a major acute phase protein and inflammatory marker, the expression of which is largely liver specific and highly inducible. Enhancers are regulatory elements critical for the precise activation of gene expression, yet the contributions of enhancers to the expression pattern of CRP have not been well defined. Here, we identify a constitutively active enhancer (E1) located 37.7 kb upstream of the promoter of human CRP in hepatocytes. By using chromatin immunoprecipitation, luciferase reporter assay, in situ genetic manipulation, CRISPRi, and CRISPRa, we show that E1 is enriched in binding sites for transcription factors STAT3 and C/EBP-β and is essential for the full induction of human CRP during the acute phase. Moreover, we demonstrate that E1 orchestrates with the promoter of CRP to determine its varied expression across tissues and species through surveying activities of E1-promoter hybrids and the associated epigenetic modifications. These results thus suggest an intriguing mode of molecular evolution wherein expression-changing mutations in distal regulatory elements initiate subsequent functional selection involving coupling among distal/proximal regulatory mutations and activity-changing coding mutations.
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Affiliation(s)
- Ming-Yu Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Chun-Miao Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Hai-Hong Zhou
- Gansu Provincial Cancer Hospital, Lanzhou 730050, P.R. China
| | - Zhong-Bo Ge
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Chen-Chen Su
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zi-Hao Lou
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin-Yun Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Tao-Tao Xu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Si-Yi Li
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China
| | - Li Zhu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China; Electron Microscopy Centre of Lanzhou University, Lanzhou 730000, China
| | - Ya-Li Zhou
- Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, 730030, China
| | - Yi Wu
- MOE Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China; Key Laboratory of Precision Medicine to Pediatric Diseases of Shaanxi Province, Xi'an Children's Hospital, Xi'an Jiaotong University, Xi'an, P.R. China.
| | - Shang-Rong Ji
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
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Ma MY, Chen XL, Chen Z, Wang X, Zhang LF, Li SN, Zheng CY, Kang YT, Zhou HH, Chen L, Cao X, Hu JH, Wang ZW. [Investigation on status of dyslipidemia in Chinese females aged 35 years or above]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:486-493. [PMID: 35589598 DOI: 10.3760/cma.j.cn112148-20211201-01035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the prevalence, awareness, treatment and control status of dyslipidemia among females aged ≥35 years old across China. Methods: Participants were selected by stratified multistage random sampling method in the "Twelfth Five-Year Plan" National Science and Technology Support Project "Survey on the Prevalence of Important Cardiovascular Diseases and Key Technology Research in China" project. This study is a retrospective, cross-sectional study. A total of 17 418 females aged 35 years and over were included in the current study. The basic information such as age, medical history and menopause was collected by questionnaire. The blood lipid parameters were derived from clinical laboratory examinations. The prevalence of dyslipidemia and the rate of awareness, treatment, and control of dyslipidemia were analyzed in females aged 35 years and over. Results: The age of participants was (56.2±13.0) years old, and the prevalence of dyslipidemia was 33.1% (5 765/17 418). The prevalence rates of high total cholesterol, hypertriglyceridemia, low HDL-C and high LDL-C were 9.7% (1 695/17 418), 11.1% (1 925/17 418), 10.9% (1 889/17 418) and 7.3% (1 262/17 418), respectively. The prevalence of dyslipidemia increased with age and the prevalence of dyslipidemia in women who were not married, Han, menarche age>16 years, obesity, central obesity, alcohol consumption, diabetes, hypertension and family history of cardiovascular disease were higher than those without such characteristics (P<0.05). There were 10 432 (59.9%) menopausal females in this cohort and prevalence of dyslipidemia of these participants was 38.8% (4 048/10 432), which was higher than that of non-postmenopausal females (24.6%, 1 717/6 986) (P<0.05). The awareness rates, treatment rates and control rates of dyslipidemia were 33.9% (1 953/5 765), 15.1% (870/5 765) and 2.5% (143/5 765) respectively among females aged 35 years and over in China. Conclusion: The prevalence of dyslipidemia in Chinese females aged 35 years and over is high, and its awareness, treatment, and control rates need to be optimized.
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Affiliation(s)
- M Y Ma
- School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, China
| | - X L Chen
- School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, China
| | - Z Chen
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - X Wang
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - L F Zhang
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - S N Li
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - C Y Zheng
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - Y T Kang
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - H H Zhou
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - L Chen
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - X Cao
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
| | - J H Hu
- School of Public Health, Gansu University of Traditional Chinese Medicine, Lanzhou 730000, China
| | - Z W Wang
- Department of Community Prevention and Treatment, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 102308, China
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Ou MQ, Fan WH, Sun FR, Jie WX, Lin MJ, Cai YJ, Liang SY, Yu YS, Li MH, Cui LL, Zhou HH. A Systematic Review and Meta-analysis of the Therapeutic Effect of Acupuncture on Migraine. Front Neurol 2020; 11:596. [PMID: 32714268 PMCID: PMC7344239 DOI: 10.3389/fneur.2020.00596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 04/18/2019] [Accepted: 05/22/2020] [Indexed: 12/21/2022] Open
Abstract
Background: Migraine is an intractable headache disorder, manifesting as periodic attacks. It is highly burdensome for patients and society. Acupuncture treatment can be beneficial as a supplementary and preventive therapy for migraine. Objectives: This systematic review and meta-analysis aimed to investigate the efficacy and safety of acupuncture for migraine, and to examine transcranial doppler changes after acupuncture. Methods: Reports, conference, and academic papers published before March 15, 2019 in databases including PubMed, Cochrane library, Embase, China National Knowledge Infrastructure, WANFANG Database, Chinese journal of Science and Technology, and China Biomedical were searched. Randomized controlled trials (RCTs) involving acupuncture, sham acupuncture, and medication in migraine were included. The Cochrane Collaboration software, RevMan 5.3, was used for data processing and migration risk analysis. Results: Twenty-eight RCTs were included. 15 RCTs included medication only, 10 RCTs included sham acupuncture only, and 3 RCTs included both. The study included 2874 patients, split into 3 groups: acupuncture treatment group (n = 1396), medication control group (n = 865), and sham acupuncture control group (n = 613). The results showed that treatment was more effective in the acupuncture group than in the sham acupuncture group (MD = 1.88, 95% CI [1.61, 2.20], P < 0.00001) and medication group (MD = 1.16, 95% CI [1.12, 1.21], P < 0.00001). Improvement in visual analog scale (VAS) score was greater in the acupuncture group than in the sham acupuncture group (MD = −1.00, 95% CI [-1.27,−0.46], P < 0.00001; MD = −0.59, 95% CI [-0.81,−0.38], P < 0.00001), and their adverse reaction rate was lower than that of the medication group (RR = 0.16, 95% CI [0.05, 0.52], P = 0.002). The improvement of intracranial blood flow velocity by acupuncture is better than that by medication, but the heterogeneity makes the result unreliable. Conclusions: Acupuncture reduced the frequency of migraine attacks, lowered VAS scores, and increased therapeutic efficiency compared with sham acupuncture. Compared with medication, acupuncture showed higher effectiveness with less adverse reactions and improved intracranial blood circulation. However, owing to inter-study heterogeneity, a prospective, multicenter RCT with a large sample is required to verify these results.
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Affiliation(s)
- Ming-Qian Ou
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Department of Neurology, Luoding People's Hospital, Affiliated Hospital of Guangdong Medical University, Luoding, China
| | - Wei-Hao Fan
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Fu-Rong Sun
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Wan-Xin Jie
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Mei-Jun Lin
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yu-Jie Cai
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Shi-Yun Liang
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yang-Sheng Yu
- Department of Neurology, Puning People's Hospital, Southern Medical University, Jieyang, China
| | - Min-Hua Li
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Li-Li Cui
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Hai-Hong Zhou
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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7
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Wang MY, Zhou HH, Zhang CM, Su HX, Li SL, Ji SR, Liu E, Wu Y. A Functional Genetic Variant at the C-Reactive Protein Promoter (rs3091244) Is Not Associated With Cancer Risk in a Chinese Population. Front Immunol 2020; 11:926. [PMID: 32477370 PMCID: PMC7240006 DOI: 10.3389/fimmu.2020.00926] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 04/21/2020] [Indexed: 01/08/2023] Open
Abstract
Background: The association of genetically elevated levels of circulating C-reactive protein (CRP) with cancer risk has been extensively investigated in European populations; however, there are conflicting conclusions. The tri-allelic rs3091244 is a functionally validated genetic variant, and its allelic frequencies differ significantly between European and Asian populations. Here, we examined the association of rs3091244 with cancer risk in a Chinese population. Methods: rs3091244 was genotyped by Sanger sequencing in 4,971 cancer cases and 2,485 controls. The rs1205 and rs2794521 gene variants were also genotyped using TaqMan assays in subgroups. Results: No association was detected between the genotyped CRP variants and cancer risk, with or without distinguishing cancer types, suggesting that circulating CRP is not causally involved in tumorigenesis in Chinese populations.
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Affiliation(s)
- Ming-Yu Wang
- Translational Medicine Research Center, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Hai-Hong Zhou
- Children's Research Institute, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - Chun-Miao Zhang
- Translational Medicine Research Center, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Hai-Xiang Su
- Children's Research Institute, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - Shuo-Lei Li
- Translational Medicine Research Center, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Shang-Rong Ji
- Translational Medicine Research Center, MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Enqi Liu
- MOE Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China
| | - Yi Wu
- MOE Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, China.,The Affiliated Children's Hospital of Xi'an Jiaotong University, Xi'an, China
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Zhou HH, Chen X, Cai LY, Nan XW, Chen JH, Chen XX, Yang Y, Xing ZH, Wei MN, Li Y, Wang ST, Liu K, Shi Z, Yan XJ. Erastin Reverses ABCB1-Mediated Docetaxel Resistance in Ovarian Cancer. Front Oncol 2019; 9:1398. [PMID: 31921655 PMCID: PMC6930896 DOI: 10.3389/fonc.2019.01398] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 11/26/2019] [Indexed: 01/01/2023] Open
Abstract
Overexpression of drug efflux transport ABCB1 is correlated with multidrug resistance (MDR) among cancer cells. Upregulation of ABCB1 accounts for the recurrence of resistance to docetaxel therapy in ovarian cancer with poor survival. Erastin is a novel and specific small molecule that targets SLC7A11 to induce ferroptosis. In the present research, we explored the synergistic effect of erastin and docetaxel in ovarian cancer. We confirmed that the co-delivery of erastin with docetaxel significantly decreased cell viability, promoted cell apoptosis, and induced cell cycle arrest at G2/M in ovarian cancer cells with ABCB1 overexpression. Mechanistically, erastin dominantly elevated the intracellular ABCB1 substrate levels by restricting the drug-efflux activity of ABCB1 without alteration of the expression of ABCB1. Consequently, erastin can reverse ABCB1-mediated docetaxel resistance in ovarian cancer, revealing that the combination of erastin and docetaxel may potentially offer an effective administration for chemo-resistant patients suffering from ovarian cancers.
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Affiliation(s)
- Hai-Hong Zhou
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xu Chen
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Lu-Ya Cai
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xing-Wei Nan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jia-Hua Chen
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiu-Xiu Chen
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yang Yang
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zi-Hao Xing
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Meng-Ning Wei
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yao Li
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Sheng-Te Wang
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Kun Liu
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zhi Shi
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xiao-Jian Yan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.,Center for Uterine Cancer Diagnosis & Therapy Research of Zhejiang Province, Women's Hospital and Institute of Translation Medicine, Zhejiang University School of Medicine, Hangzhou, China
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9
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Nan XW, Gong LH, Chen X, Zhou HH, Ye PP, Yang Y, Xing ZH, Wei MN, Li Y, Wang ST, Liu K, Shi Z, Yan XJ. Survivin Promotes Piperlongumine Resistance in Ovarian Cancer. Front Oncol 2019; 9:1345. [PMID: 31850227 PMCID: PMC6895030 DOI: 10.3389/fonc.2019.01345] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 09/27/2019] [Accepted: 11/15/2019] [Indexed: 12/20/2022] Open
Abstract
Ovarian cancer is one of the most fatal female malignancies while targeting apoptosis is critical for improving ovarian cancer patients' lives. Survivin is regarded as the most robust anti-apoptosis protein, and its overexpression in ovarian cancer is related to poor survival and apoptosis resistance. Piperlongumine (PL) extracted from peppers is defined as an active alkaloid/amide and exhibits a broad spectrum of antitumor effects. Here, we demonstrate that PL induces the rapid depletion of survivin protein levels via reactive oxygen species (ROS)-mediated proteasome-dependent pathway in vitro, while exerting a remarkable inhibitory influence on the proliferation of ovarian cancer cells. Overexpression of survivin raises the survival rate of ovarian cancer cells to PL. Moreover, PL inhibits ovarian cancer cells xenograft tumor growth and downregulates survivin in vivo. Our findings reveal a previously unrecognized mechanism of PL in suppressing survivin expression as well as survivin promotes piperlongumine resistance in ovarian cancer and suggest that ROS-mediated proteasome-dependent pathway can be exploited to overcome apoptosis resistance triggered by aberrant expression of survivin.
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Affiliation(s)
- Xing-Wei Nan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Li-Hua Gong
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xu Chen
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hai-Hong Zhou
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Piao-Piao Ye
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yang Yang
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zi-Hao Xing
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Meng-Ning Wei
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yao Li
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Sheng-Te Wang
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Kun Liu
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zhi Shi
- Guangdong Provincial Key Laboratory of Bioengineering Medicine, Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xiao-Jian Yan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.,Center for Uterine Cancer Diagnosis & Therapy Research of Zhejiang Province, Women's Hospital and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
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10
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Zhang CM, Tan YB, Zhou HH, Ge ZB, Feng JR, Lv GB, Sun ZY, Fu Y, Wang MY. Intra-subunit Disulfide Determines the Conversion and Structural Stability of CRP Isoforms. Inflammation 2019; 43:466-477. [PMID: 31760526 DOI: 10.1007/s10753-019-01130-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
C-reactive protein (CRP) is a major human acute-phase reactant that is composed of five identical subunits. CRP dissociates into subunits at inflammatory loci forming monomeric CRP (mCRP) with substantially enhanced activities, which can be further activated by reducing the intra-subunit disulfide bond. However, conformational changes underlying the activation process of CRP are less well understood. Conformational changes accompanying the conversion of CRP to mCRP with or without reduction were examined with circular dichroism spectroscopy, fluorescence spectroscopy, electron microscopy, size-exclusion chromatography, and neoepitope expression. The conversion of CRP to mCRP follows a two-stage process. In the first stage, CRP dissociates into molten globular subunits characterized by intact secondary structure elements with greatly impaired tertiary packing. In the second stage, these intermediates completely lose their native subunit conformation and assemble into high-order aggregates. The inclusion of reductant accelerates the formation of molten globular subunits in the first step and promotes the formation of more compact aggregates in the second stage. We further show a significant contribution of electrostatic interactions to the stabilization of native CRP. The conformational features of dissociated subunits and the aggregation of mCRP may have a key impact on their activities.
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Affiliation(s)
- Chun-Miao Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Yu-Bo Tan
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Hai-Hong Zhou
- Gansu Provincial Cancer Hospital, Lanzhou, 730050, People's Republic of China
| | - Zhong-Bo Ge
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Jun-Rui Feng
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Guang-Bo Lv
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Zhi-Yuan Sun
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Yu Fu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Ming-Yu Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China.
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11
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Zhang XY, You YQ, Zhou HH, Wang SJ, Xie XX, Zhang ML, Wang LX, Lu YP. [Study of genetic etiology in fetuses with severely short limbs in the first and second trimester using whole exome sequencing]. Zhonghua Fu Chan Ke Za Zhi 2019; 54:221-225. [PMID: 31006186 DOI: 10.3760/cma.j.issn.0529-567x.2019.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate pathogenic genes related to the phenotype of fetus with severely short limbs in the first and second trimester by whole exome sequencing (WES). Methods: Thirteen fetuses with severely short limbs detected by ultrasonography in the first and second trimester admitted in Chinese PLA General Hospital from September 2016 to June 2018 were collected. All cases were performed induced abortion, 6 of which were carried out karyotype analysis of amniotic fluid at the same time. WES and copy number variations (CNV) were performed on specimens from fetal tissues after labor induction. The suspected pathogenic mutations were validated by Sanger sequencing reactions. Results: No abnormal karyotypes or pathological CNV were found. In 10 fetuses, pathogenic or possibly pathogenic mutations were detected in the following genes: COL2A1, FGFR3, COL1A1, COL1A2, DYNC2LI1 and TRIP11, all of which were essential to skeletal development. The diagnostic yield of WES in the fetuses with severe short limbs was 10/13. Conclusions: In the first and second trimester, most of the fetuses with extremely short limbs suffer from monogenic diseases. WES is likely to be a valuable diagnostic testing option for the fetuses with severe short limbs.
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Affiliation(s)
- X Y Zhang
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - Y Q You
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - H H Zhou
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - S J Wang
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - X X Xie
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - M L Zhang
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
| | - L X Wang
- Department of Ultrasound, Chinese PLA General Hospital, Beijing 100853, China
| | - Y P Lu
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
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12
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Xu LN, Zhao N, Chen JY, Ye PP, Nan XW, Zhou HH, Jiang QW, Yang Y, Huang JR, Yuan ML, Xing ZH, Wei MN, Li Y, Shi Z, Yan XJ. Celastrol Inhibits the Growth of Ovarian Cancer Cells in vitro and in vivo. Front Oncol 2019; 9:2. [PMID: 30746340 PMCID: PMC6360154 DOI: 10.3389/fonc.2019.00002] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 12/06/2018] [Accepted: 01/02/2019] [Indexed: 12/21/2022] Open
Abstract
Celastrol is a natural triterpene isolated from the Chinese plant Thunder God Vine with potent antitumor activity. However, the effect of celastrol on the growth of ovarian cancer cells in vitro and in vivo is still unclear. In this study, we found that celastrol induced cell growth inhibition, cell cycle arrest in G2/M phase and apoptosis with the increased intracellular reactive oxygen species (ROS) accumulation in ovarian cancer cells. Pretreatment with ROS scavenger N-acetyl-cysteine totally blocked the apoptosis induced by celastrol. Additionally, celastrol inhibited the growth of ovarian cancer xenografts in nude mice. Altogether, these findings suggest celastrol is a potential therapeutic agent for treating ovarian cancer.
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Affiliation(s)
- Li-Na Xu
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Na Zhao
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jin-Yan Chen
- Department of Gynecology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Piao-Piao Ye
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xing-Wei Nan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hai-Hong Zhou
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qi-Wei Jiang
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yang Yang
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Jia-Rong Huang
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Meng-Ling Yuan
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zi-Hao Xing
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Meng-Ning Wei
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yao Li
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Zhi Shi
- Department of Cell Biology and Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xiao-Jian Yan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.,Center for Uterine Cancer Diagnosis & Therapy Research of Zhejiang Province, Women's Hospital and Institute of Translational Medicine, Zhejiang University School of Medicine, Zhejiang, China
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13
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Li SL, Feng JR, Zhou HH, Zhang CM, Lv GB, Tan YB, Ge ZB, Wang MY. Acidic pH promotes oxidation-induced dissociation of C-reactive protein. Mol Immunol 2018; 104:47-53. [PMID: 30408622 DOI: 10.1016/j.molimm.2018.09.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 08/09/2018] [Revised: 09/04/2018] [Accepted: 09/29/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Circulating levels of the systemic inflammation marker C-reactive protein (CRP) have been associated with increased risk and poor outcomes of many diseases, such as cardiovascular events and cancer. Accumulating evidence has indicated that the conformational rearrangement of human pentameric CRP (pCRP) to monomeric CRP (mCRP) is a prerequisite for participation in the pathogenesis. Therefore, determining the mechanism of the dissociation of pCRP into pro-inflammatory mCRP under physiological/pathological circumstances has been intriguing. METHODS The effects of oxidative and acidic stress occurring in inflammation on pCRP were examined by electrophoresis, electron microscopy, protein fluorescence, neoepitope expression and endothelial cell responses. RESULTS Reactive oxygen species (ROS) generated by the copper-hydrogen peroxide system could rapidly induce the dissociation of CRP at mild acidic pH within four hours, but not at physiological pH of 7.4. Meanwhile, mannitol, a ROS scavenger, could not protect against dissociation, which implied that local ROS from accessible histidine residues may be crucially beneficial to the formation of mCRP in a redox-balanced microenvironment. Furthermore, mCRP generated by ROS could be reduced by DTT, which indicated the exposure of functional motif aa35-47, and showed potent proinflammatory actions on endothelial cells, comparable to mCRP generated by urea. CONCLUSION dissociation of pCRP to mCRP could be rapidly induced by ROS from copper- hydrogen peroxide system in dependence on mildly acidic stress regardless of a redox-balanced microenvironment.
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Affiliation(s)
- Shuo-Lei Li
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - Jun-Rui Feng
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | | | - Chun-Miao Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - Guang-Bo Lv
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - Yu-Bo Tan
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - Zhong-Bo Ge
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - Ming-Yu Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China.
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14
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Zhou HH, Shu B, Liu TZ, Wang XH, Yang ZH, Guo YL. Association between parity and the risk for urinary incontinence in women: A meta-analysis of case-control and cohort studies. Medicine (Baltimore) 2018; 97:e11443. [PMID: 29995798 PMCID: PMC6076124 DOI: 10.1097/md.0000000000011443] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 06/15/2018] [Indexed: 12/19/2022] Open
Abstract
Urinary incontinence (UI) is a common complaint for adult female. Cross-sectional studies suggested parity may link with UI, but the association between them was not well-established. We conducted a meta-analysis to investigate the association between parity and UI.Medline and Embase were searched for eligible case-control and cohort studies about parity and UI. Two authors screened the literature and extracted the data independently. Odds ratio (OR) was used as the measure of the effect of parity on UI. We pooled the ORs of different number of parity by a random-effect model. Subgroup analysis was conducted by a subtype of UI. Sensitivity analysis was conducted to see whether the results were stable.Thirteen studies (8 cohorts and 5 case-controls) were included in our meta-analysis, with a total of 74,883 adult females. Our meta-analysis showed that compared with nulliparity, ORs of women with 1, 2, and ≥3 parity were 1.43 [95% confidence interval (95% CI): 0.90-2.28; I = 81.4%; n = 4], 1.50 (95% CI: 1.02-2.20; I = 82.5%; n = 4), and 1.58 (95% CI: 1.22-2.03; I = 70.1%; n = 7) compared with nulliparity. The OR for any multiparity to nulliparity was 1.68 (95% CI: 1.39-2.03; I = 0%; n = 4). Subgroup analysis showed that parity was associated with an increased risk of stress UI (OR = 2.32, 95% CI: 1.41-3.81; I = 0%; n = 2; 1 compared with null parity) but not urgent UI; However, the definition of parity varies across studies and studies defined parity as delivery times showed higher pooled OR than those not. Sensitivity analysis showed our results were stable.Current evidence suggested that parity was associated with an increased risk of overall and stress UI but not urgency UI, though the definition of parity may differ. Higher parity may have a more significant effect on overall UI. Standardized definition of parity is needed.
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Affiliation(s)
- Hai-Hong Zhou
- Department of Urology, Wuhan Central Hospital, Tongji Medical University, Huazhong University of Science and Technology
| | - Bo Shu
- Department of Urology, Wuhan Central Hospital, Tongji Medical University, Huazhong University of Science and Technology
| | - Tong-Zu Liu
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Xing-Huan Wang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Zhong-Hua Yang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Yong-Lian Guo
- Department of Urology, Wuhan Central Hospital, Tongji Medical University, Huazhong University of Science and Technology
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15
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Ren Y, You YQ, Zhou HH, Wang LX, Xu H, Li RB, Wang SJ, Xie XX, Meng YG, Lu YP. [Clinical analysis of 21 cases with short fetal femur in the third trimester]. Zhonghua Fu Chan Ke Za Zhi 2017; 52:86-92. [PMID: 28253570 DOI: 10.3760/cma.j.issn.0529-567x.2017.02.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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 analyze the clinical features and to explore the etiology of short fetal femur during the third trimester. Methods: From January 2010 to June 2016, 21 singleton pregnancies with short fetal femur detected by ultrasonography during the third trimester were referred to the Chinese PLA General Hospital. Clinical data were collected, karyotype or single nucleotide polymorphism microarray was carried out to detect chromosomal abnormalities, and FGFR3 c.1138G>A mutation detection was carried out to detect achondroplasia (ACH) via invasive procedure, respectively. The deviation of femur length from the mean value of the gestational age in ultrasonography was expressed as the Z-score. The difference between ACH and isolated short femur (ISF, in the absence of associated structure abnormality or genetic abnormality) was then explored. Results: In the 21 fetuses, 11 had abnormal genetic test results(52%, 11/21), including 9 cases of ACH, 1 case of Ellis-van Creveld Syndrome and 1 case of Pallister-Killian syndrome. In the 10 ISF fetuses (48%, 10/21), 3 cases were fetal growth restriction, 1 was normal small for gestational age infant and 6 cases were unexplained. The median Z-scores for 9 cases of ACH and 10 cases of ISF in the third trimester were -5.04, -3.20, respectively. The short femur in ACH was more severe than in ISF (P=0.005) in the third trimester. Conclusions: The etiology of short fetal femur is complicated, including skeletal dysplasia, chromosomal abnormality, fetal growth restriction, as well as normal variants during fetal development. Genetic test should be considered during the antenatal consultation.
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Affiliation(s)
- Y Ren
- Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
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16
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Chang XH, Zhu A, Liu FF, Zou LY, Su L, Liu SK, Zhou HH, Sun YY, Han AJ, Sun YF, Li S, Li J, Sun YB. Nickel oxide nanoparticles induced pulmonary fibrosis via TGF-β1 activation in rats. Hum Exp Toxicol 2016; 36:802-812. [DOI: 10.1177/0960327116666650] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Nano nickel oxide (NiO), widely used in industry, has recently been discovered to have pulmonary toxicity. However, no subchronic exposure studies about nano NiO-induced pulmonary fibrosis have been reported. The objective of this study was to investigate pulmonary fibrosis induced by nano NiO and its potential mechanism in rats. Male Wistar rats ( n = 40, 200–240 g) were randomized into control group, nano NiO groups (0.015, 0.06, and 0.24 mg/kg), and micro NiO group (0.024 mg/kg). All rats were killed to collect lung tissue after intratracheal instillation of NiO particles twice a week for 6 weeks. To identify pulmonary fibrosis, Masson trichrome staining, hydroxyproline content, and collagen protein expression were performed. The results showed widespread lung fibrotic injury in histological examination and increased content of hydroxyproline, collagen types I and III in rat lung tissue exposed to nano NiO. To explore the potential pulmonary fibrosis mechanism, transforming growth factor beta 1 (TGF- β1) content was measured by enzyme-linked immunosorbent assay, and the messenger RNA expression of key indicators was detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The TGF- β1 content was increased in nano NiO exposure groups, as well as the upregulated gene expression of TGF- β1, Smad2, Smad4, matrix metalloproteinase, and tissue inhibitor of metalloproteinase. The findings indicated that nano NiO could induce pulmonary fibrosis, which may be related to TGF- β1 activation.
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Affiliation(s)
- XH Chang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - A Zhu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - FF Liu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - LY Zou
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - L Su
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - SK Liu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - HH Zhou
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - YY Sun
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - AJ Han
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - YF Sun
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - S Li
- Lanzhou Municipal Center for Disease Control, Lanzhou, China
| | - J Li
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - YB Sun
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
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17
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Yang L, Levi E, Du JH, Zhou HH, Miller R, Majumdar APN. Associations between markers of colorectal cancer stem cells, mutation, microRNA and the clinical features of ulcerative colitis. Colorectal Dis 2016; 18:O185-93. [PMID: 27153478 DOI: 10.1111/codi.13371] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 02/25/2016] [Indexed: 02/08/2023]
Abstract
AIM Several factors have been implicated in the pathogenesis of colorectal cancer (CRC) associated with ulcerative colitis (UC). We investigated markers of cancer cell pluripotency, including CD44 and CD166, microRNA-21 (miR-21) and microRNA-215 (miR-215), and APC, K-ras and DCC mutations in biopsy specimens from patients with UC to evaluate any correlations with clinical risk factors. METHOD We observed 18 patients with UC and collected two biopsy specimens from each patient at diagnosis and at a follow-up end-point. We examined the expression of CD44, CD166, miR-21 and miR-215, and APC, K-ras and DCC mutations. We compared these markers at the two time points and assessed their associations with clinical characteristics, including the duration of colitis, histological alterations and the age of the patient at the onset of UC. RESULTS Most (16/18) patients had alleviation of mucosal inflammation or remained stable during follow-up; one patient developed dysplasia and one had severe aggravation of the lesion during follow-up. Enhanced expression of CD44, CD166 and miR-21 with miR-215 was found in the specimens obtained at follow-up, despite alleviation of mucosal lesions. Coherence of cancer stem cell markers and miRNAs was seen in patients who had significant worsening of inflammation, dysplasia and a long duration of colitis. APC mutation occurred in only one patient; this patient had the longest duration of UC (23 years). CONCLUSION Enhanced markers of CRC in follow-up colonic mucosal samples support the conclusion that the duration of UC plays the most important role in UC-related carcinogenesis.
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Affiliation(s)
- L Yang
- Department of Gastroenterology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - E Levi
- Division of Gastroenterology and Department of Internal Medicine, Veterans Administration Medical Center, Detroit, Michigan, USA
| | - J H Du
- Division of Gastroenterology and Department of Internal Medicine, Veterans Administration Medical Center, Detroit, Michigan, USA.,Wayne State University School of Medicine, Detroit, Michigan, USA
| | - H H Zhou
- Department of Pathology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - R Miller
- Division of Gastroenterology and Department of Internal Medicine, Veterans Administration Medical Center, Detroit, Michigan, USA.,Wayne State University School of Medicine, Detroit, Michigan, USA
| | - A P N Majumdar
- Division of Gastroenterology and Department of Internal Medicine, Veterans Administration Medical Center, Detroit, Michigan, USA.,Wayne State University School of Medicine, Detroit, Michigan, USA.,Karmanos Cancer Institute, Detroit, Michigan, USA
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Liu J, Jiang HH, Wu DK, Zhou YX, Ye HM, Li X, Luo ZY, Guo Z, Zhang YL, Wang YC, Zhang W, Zhou HH, Wang LS. Effect of gene polymorphims on the warfarin treatment at initial stage. Pharmacogenomics J 2015; 17:47-52. [PMID: 26644206 DOI: 10.1038/tpj.2015.81] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 07/13/2015] [Accepted: 10/16/2015] [Indexed: 11/09/2022]
Abstract
The adverse reactions of warfarin that were found mainly occurred in the first month. This study was carried out to observe the effect of gene polymorphisms on the warfarin therapy at the initial stage. Four-hundred and sixty Chinese patients began warfarin treatment with daily 2.5 mg after heart valve replacement operations were enrolled. The daily international normalized ratio (INR) for anticoagulation were recorded till the seventh day. Blood samples were collected and used to detect genotypes for VKORC1 rs7294, CYP2C9 rs1057910, CYP4F2 rs2108622 and ORM1 rs17650. INR and their changes were compared among genotypes. INR was partially correlated with the VKORC1 rs7294, CYP2C9 rs1057910, CYP4F2 rs2108622 and ORM1 rs17650 polymorphisms from the third, fourth and sixth day on, respectively. VKORC1 rs7294 and CYP4F2 rs2108622 carriers responded lower than the wild genotype, whereas CYP2C9 rs1057910 and ORM1 rs17650 carriers responded higher, respectively. Fifty percent of AA/*1*3/CC/*S*S patients and 16% of AA/*1*1/CC/*S*S patients were over anticoagulation treated with INR >4.0 at the third day. Ninety percent of VKORC1 rs7294 carrier patients have INR <1.63, a mark of the 25% of lower responders of the wild genotype. Our study provided another kind of evidence that VKORC1 rs7294, CYP2C9 rs1057910, CYP4F2 rs2108622 and ORM1 rs17650 affected the action of warfarin in different styles. Patients with AA/*1*1/CC/*S*S, AA/*1*3/CC/*S*S should use a less initial dosage to avoid over anticoagulation, and patients with VKORC1 rs7294 should use larger initial dose to proof an effective therapy.
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Affiliation(s)
- J Liu
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - H H Jiang
- Department of Cardiothoracic Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - D K Wu
- Department of Cardiothoracic Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Y X Zhou
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - H M Ye
- Department of Clinical Laboratory, Zhongshan Hospital Xiamen University Translational Medicine Research Center, School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - X Li
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - Z Y Luo
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - Z Guo
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - Y L Zhang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - Y C Wang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - W Zhang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - H H Zhou
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - L S Wang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
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He H, Liu ZQ, Li X, Yin JY, Zhai M, Zhou HH. The influence of cytidine deaminase -33delC polymorphism on treatment outcome with high-dose cytarabine in Chinese patients with relapsed acute myeloid leukaemia. J Clin Pharm Ther 2015; 40:555-560. [PMID: 26174689 DOI: 10.1111/jcpt.12309] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 06/23/2015] [Indexed: 11/26/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Identification of biomarkers that could predict high-dose cytarabine (Ara-C) efficacy and toxicity is a key issue in individualized therapy. The aim of our study was to evaluate the influence of cytidine deaminase (CDA) single nucleotide polymorphisms (SNPs) -451G>A (rs532545), 435C>T (rs1048977) and -33delC (rs3215400) on treatment outcome in patients with relapsed acute myeloid leukaemia (AML) after high-dose Ara-C chemotherapy. METHODS In total, 173 patients with relapsed AML, treated with high-dose Ara-C chemotherapy, were genotyped for three polymorphisms in CDA gene using the allele-specific matrix-assisted laser desorption/ionization time-of-flight mass spectrometry assays. Binary logistic regression was used to evaluate the influence of selected polymorphisms on tumour response and occurrence of treatment-related toxicity. RESULTS AND DISCUSSION The CC genotype at -33delC, a promoter polymorphism, increased the odds of overall response rate (odds ratio [OR] = 5·125; 95% confidence intervals (CI) = 2·446-10·74; P = 0·0008) and grade ≥3 infection toxicity incidence rate (OR = 3·572; 95% CI = 1·68-7·594; P = 0·003). In multivariable analysis, this polymorphism was a potential independent prognostic marker for the risk of overall response (P = 0·011), but not grade ≥3 infection toxicity incidence rate (P = 0·49). Two other polymorphisms, -451G>A and 435C>T, did not influence treatment outcome, including overall response rate, infection toxicity and nausea/vomiting, in patients with relapsed AML (P > 0·05). WHAT IS NEW AND CONCLUSION The findings suggest that CDA -33delC variant might be a potential marker for predicting treatment outcome in Chinese patients with relapsed AML given high-dose cytarabine chemotherapy.
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Affiliation(s)
- H He
- Research laboratory, Liaoning province Benxi Central Hospital, Liaoning Benxi, China.,Department of Hematology, Liaoning Province Benxi Central Hospital, Liaoning Benxi, China.,Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha, China
| | - Z Q Liu
- Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha, China
| | - X Li
- Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha, China
| | - J Y Yin
- Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha, China
| | - M Zhai
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - H H Zhou
- Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha, China
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20
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Cheng L, Xiong Y, Qin CZ, Zhang W, Chen XP, Li J, Zhou HH. HLA-B*58:01 is strongly associated with allopurinol-induced severe cutaneous adverse reactions in Han Chinese patients: a multicentre retrospective case-control clinical study. Br J Dermatol 2015; 173:555-8. [PMID: 26104483 DOI: 10.1111/bjd.13688] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- L Cheng
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Institute of Clinical Pharmacology, Central South University, Hunan Key Laboratory of Pharmacogenetics, Changsha, 410078, Hunan, China
| | - Y Xiong
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Institute of Clinical Pharmacology, Central South University, Hunan Key Laboratory of Pharmacogenetics, Changsha, 410078, Hunan, China
| | - C Z Qin
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Institute of Clinical Pharmacology, Central South University, Hunan Key Laboratory of Pharmacogenetics, Changsha, 410078, Hunan, China
| | - W Zhang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Institute of Clinical Pharmacology, Central South University, Hunan Key Laboratory of Pharmacogenetics, Changsha, 410078, Hunan, China
| | - X P Chen
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Institute of Clinical Pharmacology, Central South University, Hunan Key Laboratory of Pharmacogenetics, Changsha, 410078, Hunan, China
| | - J Li
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - H H Zhou
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.,Institute of Clinical Pharmacology, Central South University, Hunan Key Laboratory of Pharmacogenetics, Changsha, 410078, Hunan, China
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21
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Wang MY, Zhou HH, Zhang SC, Hui F, Zhu W, Su HX, Guo HY, Li XW, Ji SR, Wu Y. Recurrent mutations at C-reactive protein gene promoter SNP position -286 in human cancers. Cell Res 2014; 24:505-8. [PMID: 24418758 DOI: 10.1038/cr.2014.7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Ming-Yu Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Hai-Hong Zhou
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Shi-Chao Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Feng Hui
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Wei Zhu
- The Second Hospital, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Hai-Xiang Su
- The Gansu Cancer Hospital, Lanzhou 730050, China
| | - Hong-Yun Guo
- The Gansu Cancer Hospital, Lanzhou 730050, China
| | - Xing-Wen Li
- The Gansu Cancer Hospital, Lanzhou 730050, China
| | - Shang-Rong Ji
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Yi Wu
- 1] MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China [2] Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, Gansu 730000, China
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22
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Li Y, Liao F, Yin XJ, Cui LL, Ma GD, Nong XX, Zhou HH, Chen YF, Zhao B, Li KS. An association study on ADAM10 promoter polymorphisms and atherosclerotic cerebral infarction in a Chinese population. CNS Neurosci Ther 2013; 19:785-94. [PMID: 23773531 PMCID: PMC4233972 DOI: 10.1111/cns.12136] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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: 03/22/2013] [Revised: 05/11/2013] [Accepted: 05/14/2013] [Indexed: 12/03/2022] Open
Abstract
Aim Dysregulation of the activity of the disintegrin/metalloproteinase ADAM10 could contribute to the development of atherosclerosis. Although a number of genetic studies have focused on the association of ADAM10 gene polymorphisms with susceptibility to diseases, no genetic association studies of ADAM10 gene variability with atherosclerotic cerebral infarction (ACI) have been conducted. The aim of this study was to analyze the potential association between ADAM10 promoter polymorphisms and ACI. Methods The associations between rs653765 and rs514049 polymorphisms of the ADAM10 promoter and the possible risk of ACI were assessed among 347 patients with ACI and 299 matched healthy individuals in a case–control study. Results Overall, there was a significant difference in the genotypes frequencies of rs653765 (P = 0.04) between the ACI and control subjects. In addition, the rs653765 mutated allele of ADAM10 was significantly associated with increased ADAM10 expression in patients with ACI (P = 0.032). In contrast, the allele frequency of rs514049 was not statistically associated with ACI, and the rs514049 variant A > C did not affect the expression of ADAM10 either. Conclusion Our findings indicate a positive association between the rs653765 polymorphism of ADAM10 and ACI, as well as a negative result for rs514049. In addition, a significant increase in ADAM10 expression was observed in patients with ACI carrying the rs653765 C > T mutation. This new knowledge about ADAM10 might be clinically important and confirm a role for ADAM10 in the pathophysiology of ACI, with potentially important therapeutic implications.
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Affiliation(s)
- You Li
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
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23
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Luan P, Zhou HH, Zhang B, Liu AM, Yang LH, Weng XL, Tao EX, Liu J. Basic fibroblast growth factor protects C17.2 cells from radiation-induced injury through ERK1/2. CNS Neurosci Ther 2013; 18:767-72. [PMID: 22943143 DOI: 10.1111/j.1755-5949.2012.00365.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
AIMS To establish a radiation-induced neural injury model using C17.2 neural stem cells (NSCs) and to investigate whether basic fibroblast growth factor (bFGF) can protect the radiation-induced injury of C17.2 NSCs. Furthermore, we aim to identify the possible mechanisms involved in this model. METHODS C17.2 NSCs received a single exposure (3, 6, and 9 Gy, respectively) at a dose rate of 300 cGy/min with a control group receiving 0 Gy. Different concentrations of bFGF were added for 24 h, 5 min postirradiation. The MTS assay and flow cytometry were used to detect cytotoxicity and apoptosis. Expression of FGFR1, ERK1/2, and p-ERK1/2 proteins was detected with or without U0126 was pretreated prior to C17.2 NSCs receiving irradiation. RESULTS C17.2 NSCs showed a dose-dependent cell death as the dose of radiation was increased. Additionally, the rate of apoptosis in the C17.2 NSCs reached 31.2 ± 1.23% in the 6 Gy irradiation group, which was the most significant when compared to the other irradiation treated groups. bFGF showed protective effect on cell apoptosis in a dose-dependent manner. The mean percentage of apoptotic cells decreased to 7.83 ± 1.75% when 100 ng/mL bFGF was given. Furthermore, U0126 could block the protective effect of bFGF by inhibiting the phosphorylation of ERK1/2. CONCLUSIONS An in vitro cellular model of radiation-induced apoptosis of NSCs, in C17.2 NSCs, was developed successfully. Additionally, bFGF can protect neurons from radiation injury in vitro via the ERK1/2 signal transduction pathway.
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Affiliation(s)
- Ping Luan
- Medical School, Shenzhen University, China
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24
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Tan SL, Li Z, Song GB, Liu LM, Zhang W, Peng J, Zhang T, Jia FF, Zhou G, Zhou HH, Zhou XM. Development and comparison of a new personalized warfarin stable dose prediction algorithm in Chinese patients undergoing heart valve replacement. Pharmazie 2012; 67:930-937. [PMID: 23210243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Pharmacogenetics-based algorithms would be especially desirable for patients undergoing heart valve replacement (HVR), who are particularly sensitive to warfarin during the initial treatment phase following surgery. We aimed to derive a warfarin dosing algorithm from data of Chinese patients undergoing HVR, and to compare it with previously published dosing algorithms as applied to our HVR patients. METHODS 641 Chinese HVR patients on stable maintenance dose of warfarin were enrolled from a single clinic site. Data of 321 patients were used to derive a warfarin dosing algorithm using stepwise multiple linear regression analysis. Previously published algorithms were selected from Pubmed database for comparison. The performance of all the algorithms was characterized according to mean absolute error (MAE) and percentage of predicted doses falling within +/- 20% of clinically observed doses (percentage of ideal prediction) in the other 320 patients. RESULTS The newly developed algorithm included eight factors: VKORC1-1639G > A, CYP2C9*3, BSA, age, number of increasing INR drugs, smoking habit, preoperative stroke history and hypertension. Our algorithm accounted for 56.4% of variations in the inter-patient warfarin stable doses. All the algorithms showed better performance in a medium-dose (1.88-4.38 mg/day) and high-dose (> or = 4.38 mg/day) groupings than in a low-dose (< or = 1.88 mg/day) grouping. Compared with the 14 previously published algorithms, our algorithm had the lowest MAE (-0.07 mg/day) and the highest percentage of ideal prediction (62.8%) in the total validation cohort. CONCLUSIONS Our warfarin dosing algorithm is potentially useful for patients whose population profiles are similar to those of our patients.
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Affiliation(s)
- S L Tan
- Institute of Clinical Pharmacology, Central South University, Changsha, China
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25
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Zhou ZY, Yang ZH, Wang XH, Cao H, Chen D, Wang YZ, Zhou HH, Peng M, Liu QL, Wan SP. Increased expression of insulin-like growth factor-binding protein-3 is implicated in erectile dysfunction in two-kidney one-clip hypertensive rats after propranolol treatment. Asian J Androl 2011; 13:851-5. [PMID: 21874030 DOI: 10.1038/aja.2011.99] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
This study aimed to investigate the role of insulin-like growth factor-binding protein-3 (IGFBP-3) in erectile dysfunction (ED) in two-kidney one-clip (2K-1C) hypertensive rats treated with the β-blocking agent propranolol. Adult male Wistar rats were randomly divided into three groups: a normal control group, a hypertensive control group and a propranolol treatment group (n=9). After 4 weeks of propranolol treatment, intracavernous pressure (ICP) responses to electrical stimulation of the cavernous nerves were evaluated. The expression of IGFBP-3 and insulin-like growth factor-1 (IGF-1) mRNA and protein in the rat cavernous tissue were detected by quantitative real-time PCR and Western blot, respectively. The concentration of cyclic guanosine monophosphate (cGMP) in the cavernous tissue was determined by enzyme-linked immunosorbent assay (ELISA). Cavernosal pressure in response to cavernous nerve stimulation was decreased 4 weeks after propranolol treatment (P<0.01, compared to the hypertensive control group). IGFBP-3 mRNA and protein expression was increased in the propranolol treatment group compared to the hypertensive control group (P<0.01), whereas IGF-1 expression was decreased in the propranolol treatment group compared to the hypertensive control group (P<0.01). In addition, cavernous cGMP concentration was decreased in the propranolol treatment group compared to the hypertensive control group (P<0.01). Taken together, these results suggest that the upregulation of IGFBP-3 may play a role in the development of ED in hypertensive rats.
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Affiliation(s)
- Zhang-Yan Zhou
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
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Hu YF, Tu JH, Tan ZR, Liu ZQ, Zhou G, He J, Wang D, Zhou HH. Association of CYP3A4*18B polymorphisms with the pharmacokinetics of cyclosporine in healthy subjects. Xenobiotica 2007; 37:315-27. [PMID: 17624028 DOI: 10.1080/00498250601149206] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The aim of this study is to evaluate the association of the CYP3A4*18B genotype with the cyclosporine metabolism in healthy subjects. We employed PCR-RFLP assays for analysis of the CYP3A4*18B genotype. Each of 26 subjects, comprising 12 CYP3A4*1/*1, 12 CYP3A4*1/*18B and 2 CYP3A4*18B/*18B, was given a single oral dose of cyclosporine (4 mgkg(-1)). The plasma concentrations of cyclosporine were measured for up to 24 h post dose by high-performance liquid chromatography-electrospray mass spectrometry. We found that the mean Cmax (95% confidence intervals) of cyclosporine were 2237 (2905, 1859) (*1/*1), 2247 (2916, 1869) (*1/*18B), and 905 (1192, 506) ng ml(-1) (*18B/*18B)(p = 0.037) and the mean AUCO-4 were 5026 (6181, 4372) (*1/*1), 4434 (5481, 3841) (*1/*18B) and 2561 (3155, 1736) ng ml(-1) h (*18B/*18B) (p=0.021). The CL in the *18B/*18B group was significantly higher than in the *1/*1 group. However, Tmax exhibited no difference among the three genotypes. *18B/*18B group showed 50% reduction in concentration at 2 h post dose compared with *1/*18B (p = 0.062) or *1/*1 (p = 0.047), but no statistical significance was detected between*1/*1 and *1/*18B groups (p > 0.05). The data suggest that the CYP3A4*18B genotype affects cyclosporine pharmacokinetics probably resulting from a higher enzymatic activity of this mutation in healthy subjects.
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Affiliation(s)
- Y F Hu
- Pharmacogenetics Research Institute, Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, People's Republic of China
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Liu B, Chen JH, Zhong XX, Cui KZ, Zhou HH, Kuang YF. Preparation and electrocatalytic properties of Pt–SiO2 nanocatalysts for ethanol electrooxidation. J Colloid Interface Sci 2007; 307:139-44. [PMID: 17187816 DOI: 10.1016/j.jcis.2006.11.027] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Revised: 11/17/2006] [Accepted: 11/20/2006] [Indexed: 11/29/2022]
Abstract
Due to their high stability in general acidic solutions, SiO(2) nanoparticles were selected as the second catalyst for ethanol oxidation in sulfuric acid aqueous solution. Pt-SiO(2) nanocatalysts were prepared in this paper. The micrography and elemental composition of Pt-SiO(2) nanoparticles were characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. The electrocatalytic properties of Pt-SiO(2) nanocatalysts for ethanol oxidation were investigated by cyclic voltammetry. Under the same Pt loading mass and experimental conditions for ethanol oxidation, Pt-SiO(2) nanocatalysts show higher activity than PtRu/C (E-Tek), Pt/C (E-Tek), and Pt catalysts. Additionally, Pt-SiO(2) nanocatalysts possess good anti-poisoning ability. The results indicate that Pt-SiO(2) nanocatalysts may have good potential applications in direct ethanol fuel cells.
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Affiliation(s)
- B Liu
- College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
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Abd El-Aty AM, Goudah A, Abo El-Sooud K, El-Zorba HY, Shimoda M, Zhou HH. Pharmacokinetics and bioavailability of florfenicol following intravenous, intramuscular and oral administrations in rabbits. Vet Res Commun 2004; 28:515-24. [PMID: 15509025 DOI: 10.1023/b:verc.0000040241.06642.49] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This study examined the disposition kinetics and bioavailability of florfenicol after intravenous (i.v.), intramuscular (i.m.) and oral administration to rabbits at a dose of 30 mg/kg BW. Serial blood samples were collected through an indwelling catheter intermittently for 24 h for various routes. Plasma antibacterial concentrations were determined using a microbiological assay method with Bacillus subtilis ATCC 6633 as a reference organism. Plasma concentration-time data generated in the present study were analysed by non-compartmental methods based on statistical moment theory. Following i.v. administration, the overall elimination half-life (t1/2beta) was 1.54 h, mean residence time (MRT) was 1.69 h, mean volume of distribution at steady-state (Vdss) was 0.57 L/kg, and total body clearance (Cltot) was 0.34 L/kg/h. After i.m. and oral dosing, the terminal part of the curve should correspond to the absorption phase, instead of to the elimination phase, with terminal half-lives of 3.01 and 2.57 h, respectively. The mean absorption time (MAT) was 2.65 h for i.m. and 2.01 h for oral administration. Elimination rate constants differed with i.v., i.m. and oral administrations, suggesting a flip-flop situation. The observed mean peak plasma concentrations (Cmax obs) were 21.65 and 15.14 microg/ml achieved at a post-injection time (Tmax obs) of 0.5 h following i.m. and oral dosing, respectively. The absolute systemic availabilities were 88.25% and 50.79%, respectively, and the extent of plasma protein binding percent was 11.65%.
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Affiliation(s)
- A M Abd El-Aty
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
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Luo JM, Wan YS, Liu ZQ, Wang GR, Floros J, Zhou HH. Regularity of distribution of immunoreactive pulmonary surfactant protein A in rat tissues. Int J Mol Med 2004; 14:343-51. [PMID: 15289884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
Existing data has shown that SP-A-like protein or mRNA is widely distributed in lamellar bodies such as tissues and mucosal surfaces. Using immunohistochemistry method with a polyclonal antibody against human SP-A, in this study we investigated distribution of immunoreactive pulmonary surfactant protein A (IR-SP-A) in a number of rat tissues. The SP-A-like immunoreactivity was found in alveolar, parenchyma, pleura of lung; myelin sheath of brain; epithelia of Bowman's capsule, glomerulus and renal tubules of kidney; epithelia of colon, stomach, duct of salivary gland, pharynx; and blood vessel wall and connective tissue of extracellular matrix. The positive signal was blocked by pre-absorbed SP-A antigen from recombinant or bronchoalveolar lavage (BAL). SP-A has long been considered as an important frontier host defense molecule which participates in immune and inflammatory regulation of lung. With every inhalation, small particles, viruses, bacteria, and antigens from environment are continuously deposited onto the vast pulmonary epithelial surface. While a proper host defense is required to protect the lung, an over-exuberant response can disrupt the appropriate balance between pro- and anti-inflammatory. Traditional Chinese medicine believes that body is an open system relevant to the external environment. The physical, chemical and biological environmental factors constantly affect the open system, and the body properly reacts to maintain homeostasis of body machinery. The Chinese traditional medicine scholars have thus hypothesized that 'Qi' (meaning air) is the communication way between the body and external environment. What is 'Qi'? The results from our study suggest that IR-SP-A is a candidate of 'Qi'. It is compatible with the sites, theoretically containing collagenous and lectin domain molecules, also compatible with the primary injury sites of some autoimmune diseases. SP-A may be as one of 'Qi' molecules mentioned in traditional Chinese medicine that trigger some of autoimmune diseases.
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Affiliation(s)
- J M Luo
- Department of Orthopaedics, Brown Medical School/Rhode Island Hospital, Providence, RI 02903, USA.
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Abstract
OBJECTIVES Our goal was to establish and validate a modified cocktail approach including probe drugs caffeine, chlorzoxazone, mephenytoin, metoprolol, and midazolam for simultaneous phenotyping of CYP1A2, CYP2E1, CYP2C19, CYP2D6, and CYP3A. METHODS The study was conducted in 14 healthy, nonsmoking male volunteers with a cocktail of 5 drugs consisting of 100 mg caffeine, 200 mg chlorzoxazone, 100 mg mephenytoin, 100 mg metoprolol, and 7.5 mg midazolam in a randomized manner with a 7 x 7 Latin square design. Plasma was obtained at 1, 4, and 6 hours, and urine was collected from 0 to 8 hours after oral drug administration. RESULTS The phenotypic indexes determined for caffeine, chlorzoxazone, mephenytoin, metoprolol, and midazolam were not significantly different when the drugs were given in different combinations. There were no metabolic interactions or analytic interference of these probe drugs. CONCLUSIONS This cocktail approach can simultaneously provide independent in vivo phenotypic measures for the cytochrome P450 (CYP) enzymes CYP1A2, CYP2E1, CYP2C19, CYP2D6, and CYP3A.
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Affiliation(s)
- B Zhu
- Pharmacogenetics Research Institute, Xiang-Ya School of Medicine, Central South University, Changsha, Hunan, China
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Abstract
BACKGROUND The association between decreased drug clearance and decreased activity of cytochrome P4502C19 (CYP2C19), the inherited nature of the deficiency, and its frequency and clinical importance were evaluated extensively in the past over one decade. There is an interethnic difference in the frequency of poor metabolizers and mutant alleles of CYP2C19 among Chinese nationalities. Different frequency of mutations that code for CYP2C19 results in interethnic differences in distribution of the polymorphic trait for this enzyme. CYP2C19 genotype is a major determined factor for metabolisms of S-mephenytoin (S-MP), diazepam, and omeprazole (OP). The formations of their metabolites, 4'-hydroxymephenytoin (4'-OH-MP), demethyldiazepam, and 5-hydroxyomeprazole (5-OH-OP) are CYP2C19 genotype dependent. The inducibility of CYP2C19 activity is also related to CYP2C19 genotype. CONCLUSIONS The availability of phenotyping and genotyping methods should help identify the adverse reaction and toxicity of drugs that metabolized by CYP2C19 and determine the doses of these drugs according to individual CYP2C19 genotype.
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Affiliation(s)
- H H Zhou
- Pharmacogenetics Research Institute, Hunan Medical University, 410078, Hunan, Changsha, PR China.
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Abstract
BACKGROUND Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthase (NOS) that accumulates in renal insufficiency and may be a uremic toxin. To determine whether ADMA inhibits bone metabolism, we investigated the in vitro effect of ADMA on osteoblastic differentiation in mouse bone marrow-derived mesenchymal stem cells (BMSCs). METHODS The effect of ADMA on nitric oxide (NO) production was determined by measuring the stable end product of NO, nitrite, in the culture medium using commercial NO kit. The temporal sequence of osteoblastic differentiation in BMSCs was assessed in the presence and absence of ADMA by measuring alkaline phosphatase (ALP) activity, mineralization, and osteoblast gene expression at 0, 4, 8, 12 days of culture. RESULTS ADMA (5, 50, 500 micromol. L-1) resulted in a dose-dependent decrease in nitrite formation in conditioned media of BMCS cultures, consistent with inhibition of NOS. ADMA treatment was associated with reduced ALP activity, calcium deposition and osteoblast-related gene expression in BMSCs cultures. Concurrent treatment with l-arginine (3600 micromol. L-1) reversed the ADMA (500 micromol. L-1)-mediated decrease in NO production, restored the differentiation potential of BMSCs, and significantly attenuated the down-regulation of Cbfa1 and osteocalcin gene expression by ADMA. CONCLUSIONS ADMA inhibition of the NO-NOS pathway in BMSCs impairs osteoblastic differentiation of mouse BMSC cultures. These studies further support a role of NO in the local regulation of bone metabolism and the possibility that ADMA may act as uremic toxin on bone through its effect to inhibit NO actions in osteoblasts.
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Affiliation(s)
- Z S Xiao
- Laboratory of Molecular Pharmacology, Institute of Basic and Clinical Pharmacology, Xiangya Medical College, Central South University, Changsha, Hunan 410078, China.
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Abstract
OBJECTIVE Our objective was to evaluate the relationship between the disposition of sertraline and the presence of the CYP2C19 gene and to define the contribution of cytochrome P450 2C19 (CYP2C19) to sertraline N-demethylation. METHODS A single oral 100-mg dose of sertraline was administered to 6 subjects who were extensive metabolizers and 6 subjects who were poor metabolizers recruited from 77 healthy Chinese volunteers whose genotypes were predetermined by polymerase chain reaction-based amplification, followed by restriction fragment length polymorphism analysis. Phenotypes were determined by use of the omeprazole metabolic rate. The plasma concentrations of sertraline and desmethylsertraline were determined by gas chromatography with electron-capture detection. RESULTS Six poor metabolizers with m1 mutation had area under the plasma concentration versus time curve (AUC(0-infinity)) values (983.6 +/- 199.3 microg x h/L versus 697.6 +/- 133.0 microg x h/L; P <.05) and terminal elimination half-life values of sertraline (35.5 +/- 5.6 hours versus 23.5 +/- 4.4 hours; P <.01) that were significantly higher than the values in 6 extensive metabolizers who were either homozygous or heterozygous for CYP2C19*1. The oral clearance of sertraline in poor metabolizers (105.3 +/- 19.4 L/h) was significantly lower than that of extensive metabolizers (148.4 +/- 28.6 L/h). The area under the concentration-time curve from 0 to 144 hours and the maximum plasma concentration of desmethylsertraline in poor metabolizers were significantly lower than the values of extensive metabolizers (627.6 +/- 203.8 microg x h/L versus 972.1 +/- 270.3 microg x h/L; P <.05; and 23.6 +/- 6.5 nmol/L versus 32.4 +/- 8.2 nmol/L; P <.01; respectively). CONCLUSIONS The polymorphic CYP2C19 appears to be a major enzyme involved in the N-demethylation of sertraline, and both extensive and poor metabolizers had marked differences in the disposition of sertraline.
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Affiliation(s)
- J H Wang
- Pharmacogenetics Research Institute, Hunan Medical University, China
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Liu ZQ, Cheng ZN, Huang SL, Chen XP, Ou-Yang DS, Jiang CH, Zhou HH. Effect of the CYP2C19 oxidation polymorphism on fluoxetine metabolism in Chinese healthy subjects. Br J Clin Pharmacol 2001; 52:96-9. [PMID: 11453896 PMCID: PMC2014504 DOI: 10.1046/j.0306-5251.2001.01402.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AIMS The study was designed to investigate whether genetically determined CYP2C19 activity affects the metabolism of fluoxetine in healthy subjects. METHODS A single oral dose of fluoxetine (40 mg) was administrated successively to 14 healthy young men with high (extensive metabolizers, n=8) and low (poor metabolizers, n = 6) CYP2C19 activity. Blood samples were collected for 5-7 half-lives and fluoxetine, and norfluoxetine were determined by reversed-phase high performance liquid chromatography. RESULTS Poor metabolizers (PMs) showed a mean 46% increase in fluoxetine peak plasma concentrations (Cmax, P < 0.001), 128% increase in area under the concentration vs time curve (AUC(0, infinity), P < 0.001), 113% increase in terminal elimination half-life (t(1/2)) (P < 0.001), and 55% decrease in CLo (P < 0.001) compared with extensive metabolizers (EMs). Mean +/- (s.d) norfluoxetine AUC(0, 192 h) was significantly lower in PMs than that in EMs (1343 +/- 277 vs 2935 +/- 311, P < 0.001). Mean fluoxetine Cmax and AUC(0, infinity) in wild-type homozygotes (CYP2C19*1/CYP2C19*1) were significantly lower than that in PMs (22.4 +/- 3.9 vs 36.7 +/- 8.9, P < 0.001; 732 +/- 42 vs 2152 +/- 492, P < 0.001, respectively). Mean oral clearance in individuals with the wild type homozygous genotype was significantly higher than that in heterozygotes and that in PMs (54.7 +/- 3.4 vs 36.0 +/- 8.7, P < 0.01; 54.7 +/- 3.4 vs 20.6 +/- 6.2, P < 0.001, respectively). Mean norfluoxetine AUC(0, 192 h) in PMs was significantly lower than that in wild type homozygotes (1343 +/- 277 vs 3163 +/- 121, P < 0.05) and that in heterozygotes (1343 +/- 277 vs 2706 +/- 273, P < 0.001), respectively. CONCLUSIONS The results indicated that CYP2C19 appears to play a major role in the metabolism of fluoxetine, and in particular its N-demethylation among Chinese healthy subjects.
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Affiliation(s)
- Z Q Liu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha, Hunan 410078, China
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35
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Zhu B, Ou-Yang DS, Cheng ZN, Huang SL, Zhou HH. Single plasma sampling to predict oral clearance of CYP3A probe midazolam. Acta Pharmacol Sin 2001; 22:634-8. [PMID: 11749829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
AIM To find out a single plasma sampling to estimate oral clearance of midazolam (MDZ) and CYP3A activity, and explore the pharmacokinetics of midazolam hydroxylation in Chinese subjects. METHODS The pharmacokinetics of midazolam was assessed in ten healthy male individuals after an oral dose of 7.5 mg midazolam. RESULTS A significant correlation (r = 0.7, P < 0.05, n = 10) was found between plasma MDZ clearance and the plasma ratio of 1'-hydroxymidazolam to midazolam, which was assessed at 1 h after MDZ intake in the volunteers. Pharmacokinetics parameters of midazolam were as follows: Cmax (191 +/- 17) nmol/L, tmax (1.01 +/- 0.14) h, t(1/2) (3.2 +/- 0.4) h, AUC(0-infinity) (681 +/- 43) nmol.h.L-1), Cl(oral) (0.54 +/- 0.04) L.h-1.kg-1, Ke (0.2415 +/- 0.0021) h-1, Kalpha (0.82 +/- 0.18) h-1. CONCLUSION Single plasma sampling of 1 h after 7.5 mg oral MDZ intake can be used to predict the oral clearance of midazolam.
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Affiliation(s)
- B Zhu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410078, China
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Han XM, Ou-Yang DS, Lu PX, Jiang CH, Shu Y, Chen XP, Tan ZR, Zhou HH. Plasma caffeine metabolite ratio (17X/137X) in vivo associated with G-2964A and C734A polymorphisms of human CYP1A2. Pharmacogenetics 2001; 11:429-35. [PMID: 11470995 DOI: 10.1097/00008571-200107000-00006] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Either G-2964 or A734 in the human CYP1A2 gene was confirmed to be associated with high inducible enzyme activity in smokers, but not in nonsmokers. In this study, for the first time, we observed an association between phenotypes and genotypes of CYP1A2 with respect to the two genetic polymorphisms in 163 healthy Chinese volunteers living in Qidong. The ratio of plasma 17X/137X at 6 h after oral administration of 300 mg caffeine was employed in CYP1A2 phenotyping analysis, while genotyping analysis was carried out by polymerase chain reaction-restriction fragment length polymorphism. The allele frequencies of A at -2964 and A at 734 in 139 non-smoking subjects were 0.25 and 0.67, respectively. The A/A-2964C/C734, G/A-2964C/C734 or A/A-2964C/A734 genotype that was thought to have lower inducibility/activity of CYP1A2 than the other genotypes did not exist in the tested Chinese subjects. The ratio of 17X/137X was 0.46 +/- 0.26 in G/G-2964A/A734 genotypes (n = 22) and 0.36 +/- 0.19 in non-G/G-2964A/A734 (n = 117). In addition, there was significant difference between them (P = 0.036). A similar result was also achieved in 24 smokers. Since Qidong is a special region with particularly high incidence of hepatocellular carcinoma in China, the association of phenotypes with genotypes of CYP1A2 in the Qidong population might result from some inducible environmental factors such as those of cigarettes in smokers.
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Affiliation(s)
- X M Han
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha, China
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Abstract
OBJECTIVE This study was designed to examine whether transcranial electrical motor evoked potential (MEP) monitoring is safe, feasible, and valuable for brain tumor surgery. METHODS Fifty consecutive patients undergoing brain tumor resection were studied, using nitrous oxide/propofol anesthesia. MEPs were continuously recorded throughout surgery, using a Sentinel 4 evoked potential system (Axon Systems, Inc., Hauppauge, NY). The MEPs were elicited by transcranial electrical stimulation (train of 5; stimulation rate, 0.5-2 Hz; square wave pulse with a time constant of 0.5 ms; stimulation intensity, 40-160 mA) through spiral electrodes placed over the primary motor cortex and were recorded by needle electrodes inserted into the contralateral orbicularis oris, biceps, abductor pollicis brevis, and anterior tibialis muscles. When MEP amplitudes decreased by more than 50%, MEP stimulation was repeated, with increased stimulation intensity, and MEP changes were reported to the surgeon. The motor function of each patient was examined before and after surgery, using a reproducible scale. The relationship between MEP amplitude decreases and worsening motor status was analyzed using linear regression. RESULTS Preoperative neurological examinations revealed mild to moderate motor deficits (2/5 to 4/5) for 38% of patients (19 of 50 patients). Most of the patients (96%) exhibited recordable baseline MEPs. Persistent MEP decreases of more than 50% were noted for eight patients (16%) (11 muscles). The MEPs were completely abolished in two patients (three muscles). The degree of postoperative worsening of motor status was correlated with the degree of intraoperative MEP amplitude reduction (r = -0.864; P < 0.001). CONCLUSION Persistent intraoperative MEP reductions of more than 50% were associated with postoperative motor deficits. The degree of MEP amplitude reduction was correlated with postoperative worsening of motor status. Transcranial electrical MEP monitoring is feasible, safe, and valuable for brain tumor surgery.
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Affiliation(s)
- H H Zhou
- Department of Anesthesiology, New York University Medical Center, New York 10016, USA
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Cheng ZN, Huang SL, Tan ZR, Wang W, Zhou HH. Determination of estradiol metabolites in human liver microsome by high performance liquid chromatography-electrochemistry detector. Acta Pharmacol Sin 2001; 22:369-74. [PMID: 11742592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
AIM To constitute a method to determine the estradiol metabolites in human liver microsome in low concentration of estradiol. METHODS Use high performance liquid chromatography after solvent extraction, evaporation, and reconstitution to separate the metabolites and use a electrochemistry detector to detect the metabolites. RESULTS With a mobile phase of acetic acid buffer-acetonitrile (50:50, v/v, pH 4.5) at flow rate of 1.0 mL/min and a potential of +0.7 V vs Ag/AgCl, all six composition were well separated and satisfactorily detected. There are E3, 16alpha-OHE1, 2-OHE2, E1, and two unidentified composition. The minimum detectable amount is about 100 p g on column. This method is sensitive enough to detect E1 in a substrate concentration of 1 micromol/L. CONCLUSION The method can be used to study the metabolism mechanism of estradiol in liver microsome.
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Affiliation(s)
- Z N Cheng
- Pharmacogenetics Research Institute, Basic and Clinical Pharmacology, Hunan Medical University, Changsha 410078, China
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Xie HG, Dishy V, Sofowora G, Kim RB, Landau R, Smiley RM, Zhou HH, Wood AJ, Harris P, Stein CM. Arg389Gly beta 1-adrenoceptor polymorphism varies in frequency among different ethnic groups but does not alter response in vivo. Pharmacogenetics 2001; 11:191-7. [PMID: 11337934 DOI: 10.1097/00008571-200104000-00002] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
There are marked interethnic differences in beta 1-adrenoceptor-mediated responsiveness, with sensitivity decreased in African-Americans and increased in Chinese compared with Caucasians. Therefore, the frequency of a common naturally occurring polymorphism of the human beta 1-adrenoceptor gene (Arg389Gly), which has functional importance in vitro, was determined in 194 African-Americans, 316 Caucasian-Americans, 221 Hispanic-Americans and 142 Chinese. African-Americans were found to have a significantly lower frequency of the Arg389 allele than the other three ethnic groups (all P < 0.01). In the populations studied, the order of the distribution of the Arg389 allele was: Chinese (74%) > Caucasians (72%) > Hispanics (67%) > African-Americans (58%). To determine the functional significance of the Arg389Gly beta 1-adrenoceptor polymorphism, in-vivo heart rate responses to exercise were compared in healthy subjects homozygous for the Arg (n = 9) and Gly (n = 8) alleles. Heart rate response to exercise was not affected by genotype (P = 0.4). Although ethnic differences in the frequency of the beta 1-adrenoceptor Arg389Gly polymorphism exist, the polymorphism does not appear to have functional significance in healthy subjects and therefore may not contribute to ethnic differences in response to drugs acting through the beta 1-adrenoceptor.
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Affiliation(s)
- H G Xie
- Division of Clinical Pharmacology, Departments of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, TN, USA
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Shu Y, Cheng ZN, Liu ZQ, Wang LS, Zhu B, Huang SL, Ou-Yang DS, Zhou HH. Interindividual variations in levels and activities of cytochrome P-450 in liver microsomes of Chinese subjects. Acta Pharmacol Sin 2001; 22:283-8. [PMID: 11742579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
AIM To compare the level and/or activity of several important cytochrome P-450 (CYP) enzymes in liver microsomes prepared from different Chinese subjects. METHODS Individual CYP contents, including CYP1A2, CYP2C9, and CYP3A4, in liver microsomes of 17 Han, 17 Zhuang, and 8 Miao subjects were determined by using Western blot analysis and densitometric scanning. The substrates for measuring the activity of individual CYP in vitro included phenacetin, tolbutamide, debrisoquine, and omeprazole. RESULTS There was a large interindividual variability in the content and activity of CYP1A2, 2C9 and 3A4. And the activity of CYP2D6 also varied greatly between individual samples. CYP3A4 (32 %) is the most abundant CYP in Chinese liver microsomes, and the levels of CYP2C9 (19 %) and CYP1A2 (16 %) were also considerable. No clear ethnic, sex- and age-related differences in individual CYP content and catalytic activity were detected in 42 Chinese liver samples, except that there were somewhat ethnic and sex-related differences in the content and activity of CYP1A2. Good correlation between enzyme protein content and activity was found for CYP1A2, 2C9 and 3A4. CONCLUSION Our results may provide useful information for the study of drug metabolism by liver microsomes in Chinese.
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Affiliation(s)
- Y Shu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410078, China
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Cheng ZN, Shu Y, Liu ZQ, Wang LS, Ou-Yang DS, Zhou HH. Role of cytochrome P450 in estradiol metabolism in vitro. Acta Pharmacol Sin 2001; 22:148-54. [PMID: 11741520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
AIM Catechol estrogens and 16alpha-hydroxy estrogen are important metabolites that cause carcinogenesis. This study was aimed to stud y the role of cytochrome P450 in estradiol metabolism. METHODS The estradiol metabolites were determined with HPLC-ECD. Correlation of estradiol metabolites production between cytochrome P450 activity, the inhibitory effect of specific inhibitors and enzyme catalyzing kinetics were studied in cDNA-expressed P450 or human liver microsomes. RESULT CYP1A2, CYP3A4, and CYP2C9 catalyze the estradiol 2-hydroxylation. CYP2C9, CYP2C19, and CYP2C8 have high activity in catalyzing 17beta-hydroxy dehydrogenation in cDNA expressed P450, but CYP1A2 is the most important enzyme in catalyzing estradiol 2-hydroxylation. Using furafyllin and troleandomycin to inhibit CYP1A2 and CYP3A4 in liver microsomes, it was found that the 2-hydroxylation had been inhibited about the same amount. This result suggests that in human liver microsomes CYP1A2 and CYP3A4 play an important role in 2-hydroxy estradiol formation. At low substrate concentration, 17beta -hydroxy dehydrogenation dominated the estradiol metabolism, but at high substrate concentration, 2-hydroxylation exceeded 17beta-hydroxy dehydrogenation to become the important mechanism. CONCLUSION CYP1A2 and CYP3A4 are two important enzymes catalyzing the main estradiol 2-hydroxylation metabolism pathway at high substrate concentrations. 17beta-hydroxy dehydrogenation is the main metabolism pathway at low concentrations, and CYP2C9, CYP2C19, and CYP2C8 may have high catalyzing activity.
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Affiliation(s)
- Z N Cheng
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410 078, China
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Liu ZQ, Shu Y, Huang SL, Wang LS, He N, Zhou HH. Effects of CYP2C19 genotype and CYP2C9 on fluoxetine N-demethylation in human liver microsomes. Acta Pharmacol Sin 2001; 22:85-90. [PMID: 11730569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
AIM The present study was designed to define the kinetic behavior of fluoxetine N-demethylation in human liver microsomes and to identify the isoforms of cytochrome P-450 (CYP) involved in this metabolic pathway. METHODS The kinetics of Ne formation of norfluoxetine was determined in human liver microsomes from six genotyped CYP2C19 extensive metabolizers (EM). The correlation studies between the fluoxetine N-demethylase activity and various CYP enzyme activities were performed. Selective inhibitors or chemical probes of various cytochrome P-450 isoforms were also employed. RESULTS The kinetics of norfluoxetine formation in all liver microsomes were fitted by a single-enzyme Michaelis-Menten equation (mean Km=32 micromol/L+/-7 micromol/L). Significant correlations were found between N-demethylation of fluoxetine at both 25 micromol/L and 100 micromol/L and 3-hydroxylation of tolbutamide at 250 micromol/L (r1=0.821, P1=0.001; r2=0.668, P2=0.013), respectively, and S-mephenytoin 4'-hydroxylase activity (r=0.717, P=0.006) at high substrate concentration of 100 micromol/L. S-mephenytoin (SMP) (a CYP2C19 substrate) at high concentration and sulfaphenazole (SUL) (a selective inhibitor of CYP2C9) substantially inhibited norfluoxetine formation. The reaction was minimally inhibited by coincubation with chemical probe, inhibitor of CYP3A4 (triacetyloleandomycin, TAO). The inhibition of fluoxetine N-demethylation at high substrate concentration (100 micromol/L) was greater in PM livers than in EM livers (73 % vs 45 %, P < 0.01) when the microsomes were precoincubated with SUL plus TAO. CONCLUSION Cytochrome P-450 CYP2C9 is likely to be a major CYP isoform catalyzing fluoxetine N-demethylation in human liver microsomes at a substrate concentration close to the therapeutic level, while polymorphic CYP2C19 may play a more important role in this metabolic pathway at high substrate concentration.
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Affiliation(s)
- Z Q Liu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410078, China
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Shu Y, Wang LS, Xu ZH, He N, Xiao WM, Wang W, Huang SL, Zhou HH. 5-hydroxylation of omeprazole by human liver microsomal fractions from Chinese populations related to CYP2C19 gene dose and individual ethnicity. J Pharmacol Exp Ther 2000; 295:844-51. [PMID: 11046127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
It has been previously reported that omeprazole (OP) oxidation is mediated by CYP2C19 and CYP3A4 in human livers. In this study, we assessed their relative contributions with human liver microsomal fractions from Chinese populations that were genotyped by CYP2C19 and recruited from two ethnic groups, Han and Zhuang. The kinetics of 5-hydroxyomeprazole (5-OH-OP) formation was best described by the two-enzyme and single-enzyme Michaelis-Menten equations for liver microsomes from CYP2C19 extensive (EMs) and poor metabolizers, respectively. At a low substrate concentration that may be encountered in vivo, the monoclonal antibody to CYP2C8/9/19 strongly inhibited 5-OH-OP formation in EM microsomes, whereas troleandomycin (TAO) eliminated most of the formation at a high substrate concentration. In poor metabolizer microsomes, either TAO or anti-CYP3A4 could alone abolish 5-OH-OP formation. Furthermore, there were differences between homozygous and heterozygous EMs in the percentage of inhibition by TAO and the antibodies. At the low substrate concentration, OP 5-hydroxyaltion was correlated well with S-mephenytoin 4'-hydroxylation and CYP2C19 contents in liver microsomes of 34 Chinese individuals. Moreover, in these individuals, obviously genetic and somewhat ethnic differences in OP 5-hydroxylation were observed between different CYP2C19 genotypes (wt/wt > wt/m1 > m1/m1) and between Han and Zhuang (Han > Zhuang), respectively. The results indicate that CYP2C19 is a high-affinity enzyme for OP 5-hydroxylation by liver microsomes from Chinese individuals and that its contribution is CYP2C19 gene dependent and ethnically related. Similar studies indicate that OP sulfoxidation is mediated mainly by CYP3A4 and independent of CYP2C19 genotype status.
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Affiliation(s)
- Y Shu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha, China.
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Liu ZQ, Cheng ZN, Wang W, Tan ZR, Ou-Yang DS, Zhou HH. Determination of fluoxetine and its metabolite norfluoxetine in human liver microsomes by reversed-phase HPLC in vitro. Acta Pharmacol Sin 2000; 21:1027-30. [PMID: 11501058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
AIM A high-performance liquid chromatography (HPLC) method was developed for the determination of fluoxetine (FLU) and its metabolite norfluoxetine (N-FLU) in human liver microsomes in vitro. METHODS An incubation buffer containing human liver microsomes, NADPH-generating system, and FLU, after termination of enzyme reaction and addition of nortriptyline (NOR) as internal standard (IS), was extracted with n-hexane/acetonitrile, and separated on a reversed-phase ODS column. Detection was achieved at 226 nm by ultraviolet detector (UV). RESULTS The limit of detection was 5 micrograms/L for both FLU and N-FLU. No potential interference was found. The method provides recoveries of up to 94%-104% and acceptable coefficients of variation were found for both within-run (< 7.8%) and day to day (< 9.1%) assays. CONCLUSION This method is rapid, sensitive, and simple for studying the metabolism of FLU and N-FLU.
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Affiliation(s)
- Z Q Liu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410078, China
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Han XM, Chen XP, Wu QN, Jiang CH, Zhou HH. G-2964A and C734A genetic polymorphisms of CYP1A2 in Chinese population. Acta Pharmacol Sin 2000; 21:1031-4. [PMID: 11501059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
AIM To observe the G-2964A and C734A genetic polymorphisms of human CYP1A2 in Chinese population. METHODS Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was employed in genotyping analysis. RESULTS The allele frequencies of A-2964 were 0.25 and 0.22 in Qidong and Changsha populations, respectively. The incidences of A734 were 0.68 in Qidong population and 0.66 in Changsha population. No more than two low-inducibility/activity alleles were presented in one person. CONCLUSION The distribution of the G-2964A and C734A genetic polymorphisms did not show significant difference between Chinese and Japanese populations. The incidence of C734A in Chinese was also similar to that in Caucasian population.
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Affiliation(s)
- X M Han
- Pharmacogenetics Research Institute, Basic and Clinical Pharmacology Institute, Hunan Medical University, Changsha 410078, China
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Abstract
Ethnic differences in drug metabolism are well documented for a number of drugs. The molecular mechanisms responsible for ethnic differences in drug metabolism have been partly clarified because of the advances in molecular biology in recent years. Gene dosage determines the drug metabolism as demonstrated for S-mephenytoin and diazepam metabolism. Genotype analysis indicates a different frequency for the mutant alleles in different ethnic populations, which results in variations in the frequency of subjects who are homozygous for the mutant allele among the extensive metabolizers in different ethnic populations. Ethnic differences in drug metabolism may result from differences in distribution of a polymorphic trait and mutations which code for enzymes with abnormal activity which occur with altered frequency in different ethnic groups.
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Affiliation(s)
- H H Zhou
- Pharmacogenetics Research Institute, Hunan Medical University, Hunan, China.
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Shu Y, Wang LS, Xiao WM, Wang W, Huang SL, Zhou HH. Probing CYP2C19 and CYP3A4 activities in Chinese liver microsomes by quantification of 5-hydroxyomeprazole and omeprazole sulphone. Acta Pharmacol Sin 2000; 21:753-8. [PMID: 11501187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
AIM To develop an analytical method for simultaneous quantification of 5-hydroxyomeprazole (5-OH-OP) and omeprazole sulfone (OPS), and explore whether omeprazole (OP) is an appropriate phenotypic probe for CYP2C19 and CYP3A4 in Chinese liver microsomes. METHODS OP metabolism in vitro was conducted in Chinese liver microsomes, and the major metabolites 5-OH-OP and OPS were determined using high pressure liquid chromatography (HPLC). Monoclonal antibodies anti-CYP2C8/9/19 and anti-CYP3A4 were employed to conduct inhibition experiments. The protein contents of CYP2C19 and CYP3A4 were quantified using Western blot analysis and densitometric scanning. RESULTS 5-OH-OP and OPS gave a baseline resolution in the HPLC analysis. The detection limits for both compounds were 0.01 nmol and the recovery (98%-102%) had good precision with relative standard deviation of < 9.5%. Both anti-CYP2C8/9/19 and anti-CYP3A4 had a significant inhibitory effect (P < 0.05) on the 5-OH-OP formation in a substrate concentration-dependent manner, and anti-CYP3A4 alone could almost abolish the formation of OPS (> 87%). At a substrate concentration of 2 mumol/L OP, good correlations were found between OP 5-hydroxylation and S-mephenytoin 4'-hydroxylation activities (r = 0.72, P < 0.01), OP 5-hydroxylation activities and CYP2C19 contents (r = 0.82, P < 0.01), and OP sulfoxidation activities and CYP3A4 contents (r = 0.78, P < 0.01) in Chinese liver microsomes. CONCLUSION OP metabolism is mediated mainly by CYP2C19 and CYP3A4, and OP can be used to probe CYP2C19 and CYP3A4 activities in Chinese liver microsomes at appropriate substrate concentrations with the HPLC method presently developed.
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Affiliation(s)
- Y Shu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410078, China
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48
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Han XM, Zhou HH. Polymorphism of CYP450 and cancer susceptibility. Acta Pharmacol Sin 2000; 21:673-9. [PMID: 11501173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
CYP450s form a superfamily involved in the metabolism of many endogenous and exogenous substrates. In this review, the substrates, probe drugs, genetic polymorphisms, and associated cancers of CYP1A1, CYP1A2, CYP2C19, CYP2D6, CYP2E1, and CYP3A4 are summarized.
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Affiliation(s)
- X M Han
- Pharmacogenetics Research Institute, Basic and Clinical Pharmacology Institute, Hunan Medical University, Changsha 410078, China
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Lu AH, Shu Y, Huang SL, Wang W, Ou-Yang DS, Zhou HH. In vitro proguanil activation to cycloguanil is mediated by CYP2C19 and CYP3A4 in adult Chinese liver microsomes. Acta Pharmacol Sin 2000; 21:747-52. [PMID: 11501186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
AIM To identify the cytochrome P450 isoforms involved in proguanil (PG) activation to cycloguanil (CG) in Chinese liver microsomes. METHODS The kinetics of the CG formation from PG was determined in the liver microsomes of 6 Chinese subjects. Selective chemical inhibitors to various cytochrome P450 isoforms were employed to conduct inhibition experiments. The relationship between the CG formation and S-mephenytoin 4'-hydroxylation was analyzed. RESULTS The kinetic behaviors of CG formation were described well by a single-enzyme Michaelis-Menten equation in five livers. The apparent Km and Vmax were (82 +/- 47) mumol.L-1 and (8 +/- 6) pmol.min-1.mg-1 protein, respectively. However, the remaining one displayed a two-enzyme kinetic behavior. Inhibition experiments showed that troleandomycin (100 mumol.L-1) and diethyldithiocarbamate (100 mumol.L-1), as potent CYP3A4 and CYP2E1 inhibitors, respectively, reduced the formation rate of CG by 81.1% and 47.23%, while quinidine (10 mumol.L-1), furafylline (20 mumol.L-1), and sulfaphenazole (10 mumol.L-1), which were inhibitors towards CYP2D6, 1A2 and 2C9/10, respectively, did not display significant inhibition. At a low PG concentration of 5 mumol.L-1, the CG formation correlated well with S-mephenytoin 4'-hydroxylation (r = 0.805, P < 0.05). Nevertheless, when a high substrate concentration (500 mumol.L-1) was used, the correlation coefficient decreased (r = 0.581, P < 0.05). CONCLUSION The present study indicates that CYP3A4 and CYP2C19 are involved in PG activation to CG in adult Chinese liver microsomes. CYP2C19 played an important role in the clearance of PG at a substrate concentration close to in vivo therapeutic concentrations, while CYP3A4 gradually made a dominant contribution with the increase of PG concentration.
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Affiliation(s)
- A H Lu
- Pharmacogenetics Research Institute, Hunan Medical University, Changsha 410078, China
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Cheng ZN, Zhou HH. Contribution of genetic variations in estradiol biosynthesis and metabolism enzymes to osteoporosis. Acta Pharmacol Sin 2000; 21:587-90. [PMID: 11360662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023] Open
Abstract
The occurrence of osteoporosis is closely related to serum estradiol level. CYP19 is the most important biosynthesis enzyme and CYP1A2, CYP3A4, and 17 beta-HSD are important metabolism enzymes. Any changes in these enzymes activity affects estradiol biosynthesis or metabolism, and changes the estradiol serum level. By reviewing the recent literature, it was found that the genetic variations of CYP19, CYP1A2, CYP3A4, and 17 beta-HSD are important factors affecting the estradiol serum level, and may be closely related to the development of osteoporosis.
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Affiliation(s)
- Z N Cheng
- Pharmacogenetics Research Institute, Basic and Clinical Pharmacology Institute, Hunan Medical University, Changsha 410078, China
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