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Wu JH, Xu SX, Xu M, Shen P, Chen JF, Jin XT, Kuick HONG, Chang TOUEN, Yin MZ. [Intra-abdominal EWSR1/FUS-CREM rearranged malignant epithelioid neoplasms: report of a case]. Zhonghua Bing Li Xue Za Zhi 2024; 53:299-302. [PMID: 38433061 DOI: 10.3760/cma.j.cn112151-20231023-00286] [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: 03/05/2024]
Affiliation(s)
- J H Wu
- Department of Pathology, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - S X Xu
- Department of Pathology, Fujian Children's Hospital (Fujian Branch of Shanghai Children's Medical Center), Fuzhou 350011, China
| | - M Xu
- Department of Pathology, Children's Hospital Affiliated to Chongqing Medical University, Chongqing 400000, China
| | - P Shen
- Department of Pathology, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - J F Chen
- Department of Pathology, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - X T Jin
- Department of Pathology, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - H O N G Kuick
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore 229899, Singapore
| | - T O U E N Chang
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore 229899, Singapore
| | - M Z Yin
- Department of Pathology, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
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Lin ZP, Hu XL, Chen D, Zou XG, Zhong H, Xu SX, Chen Y, Li XQ, Zhang J, Huang DB. Clinical efficacy of targeted therapy, immunotherapy combined with hepatic artery infusion chemotherapy (FOLFOX), and lipiodol embolization in the treatment of unresectable hepatocarcinoma. J Physiol Pharmacol 2022; 73. [PMID: 37087567 DOI: 10.26402/jpp.2022.6.08] [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] [Received: 10/05/2022] [Accepted: 12/31/2022] [Indexed: 04/24/2023]
Abstract
To evaluate the clinical efficacy of targeted therapy and immunotherapy combined with hepatic arterial infusion chemotherapy (HAIC) of FOLFOX and lipiodol embolization in the treatment of unresectable hepatocellular carcinoma. Patients included in the study were those who received targeted therapy and immunotherapy combined with HAIC of FOLFOX and lipiodol embolization in Zhongshan People's Hospital from December 2020 to June 2021 for unresectable hepatocellular carcinoma. Evaluation indicators included objective response rate (ORR), median progression-free survival (mPFS), median duration of response (mDOR), 1-year overall survival rate (OS), surgical conversion rate, and adverse events. Treatment response was assessed using Response Evaluation Criteria in Solid Tumors (mRECIST and RECIST v1.1). A total of 35 patients were included in this study, 30 of whom completed treatment evaluation. According to mRECIST evaluation criteria, the objective response rate (ORR) was 83.3% (25/30); the complete response (CR) was 60% (18/30); the partial response (PR) was 23.3% (7/30), and stable disease (SD) was 16.7% (5/30). The mDOR was 10.3 months (95% Cl: 8.27-NE), and the mPFS was 13.2 months (95% CI: 10.3-NE); the surgical conversion rate was 30.0% (9/30). The 1-year OS was 96.7%. There were no serious surgical complications and grade 4 or 5 adverse events of targeted therapy, immunotherapy and HAIC. Some patients had grade 3 adverse reactions in gastrointestinal toxicity or hepatotoxicity, and the adverse reactions were improved after corresponding symptomatic treatment. We concluded that HAIC of FOLFOX and lipiodol embolization combined with targeted therapy and immunotherapy had a significant curative effect in the treatment of unresectable hepatocellular carcinoma, with no serious adverse reactions and a high rate of surgical conversion rate.
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Affiliation(s)
- Z P Lin
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - X L Hu
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - D Chen
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - X G Zou
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - H Zhong
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - S X Xu
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - Y Chen
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - X Q Li
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - J Zhang
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China
| | - D B Huang
- Department of Interventional Medicine, Zhongshan People's Hospital, Zhongshan City, Guangdong Province, China.
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Tang YH, Li YY, Xie YQ, Zhang SD, Xu SX, Le RR, Chu XZ, Hu CJ, Wang XJ, Pan WH, Liang YB. [Phacoemulsification combined with goniosynechialysis under a gonioscope in the treatment of angle-closure glaucoma: the effect of reopening the synechial anterior chamber angle]. Zhonghua Yan Ke Za Zhi 2022; 58:701-705. [PMID: 36069091 DOI: 10.3760/cma.j.cn112142-20211127-00565] [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
A total of 170 consecutive patients (181 eyes) who were diagnosed with primary angle-closure glaucoma (PACG) and underwent phacoemulsification and intraocular lens implantation (PEI) combined with goniosynechialysis (GSL) with an instrument under a gonioscope in the Eye Hospital, Wenzhou Medical University from January 1, 2017 to December 31, 2019 were observed. Anterior chamber angle synechiae of 0 (0, 2) clock hour were released after PEI, while after combined goniosynechialysis, synechiae of 6 (3, 8) clock hours were further released. No matter in chronic PACG and acute PACG with cornea edema, the extent of anterior chamber angle synechiae was different before surgery and after PEI, and so was it in post-PEI and PEI-GSL prospectively (all P<0.01). Phacoemulsification alone can reopen the synechial anterior chamber angle in both chronic PACG and acute PACG in part, but not sufficiently. Combined goniosynechialysis under a gonioscope with an instrument is essential and effective.
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Affiliation(s)
- Y H Tang
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - Y Y Li
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - Y Q Xie
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - S D Zhang
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - S X Xu
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - R R Le
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - X Z Chu
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - C J Hu
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - X J Wang
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - W H Pan
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - Y B Liang
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
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Zhao LN, Ma SW, Xiao J, Yang LJ, Xu SX, Zhao L. Bone marrow mesenchymal stem cell therapy regulates gut microbiota to improve post-stroke neurological function recovery in rats. World J Stem Cells 2021; 13:1905-1917. [PMID: 35069989 PMCID: PMC8727225 DOI: 10.4252/wjsc.v13.i12.1905] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/06/2021] [Accepted: 12/11/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND As a cellular mode of therapy, bone marrow mesenchymal stem cells (BMSCs) are used to treat stroke. However, their mechanisms in stroke treatment have not been established. Recent evidence suggests that regulation of dysregulated gut flora after stroke affects stroke outcomes.
AIM To investigate the effects of BMSCs on gut microbiota after ischemic stroke.
METHODS A total of 30 Sprague-Dawley rats were randomly divided into three groups, including sham operation control group, transient middle cerebral artery occlusion (MCAO) group, and MCAO with BMSC treatment group. The modified Neurological Severity Score (mNSS), beam walking test, and Morris water maze test were used to evaluate neurological function recovery after BMSC transplantation. Nissl staining was performed to elucidate on the pathology of nerve cells in the hippocampus. Feces from each group of rats were collected and analyzed by 16s rDNA sequencing.
RESULTS BMSC transplantation significantly reduced mNSS (P < 0.01). Rats performed better in the beam walking test in the BMSC group than in the MCAO group (P < 0.01). The Morris water maze test revealed that the BMSC treatment group exhibited a significant improvement in learning and memory. Nissl staining for neuronal damage assessment after stroke showed that in the BMSC group, cells were orderly arranged with significantly reduced necrosis. Moreover, BMSCs regulated microbial structure composition. In rats treated with BMSCs, the abundance of potential short-chain fatty acid producing bacteria and Lactobacillus was increased.
CONCLUSION BMSC transplantation is a potential therapeutic option for ischemic stroke, and it promotes neurological functions by regulating gut microbiota dysbiosis.
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Affiliation(s)
- Lin-Na Zhao
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
- Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin 300381, China
| | - Song-Wen Ma
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Jie Xiao
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Li-Ji Yang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Shi-Xin Xu
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
- Tianjin Key Laboratory of Translational Research of TCM Prescription and Syndrome, Tianjin 300381, China
| | - Lan Zhao
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300381, China
- National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
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Tang SH, Zhang C, Zhou LL, Li YQ, Xu SX, Wang Z. [An investigation and analysis of an acute occupational methyl acetate poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:943-946. [PMID: 35164427 DOI: 10.3760/cma.j.cn121094-20201012-00569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This article investigated an occupational chemical poisoning incident that occurred in a certain place in Guangdong Province in September 2020, detected the air at the scene, and analyzed the clinical data of the poisoned patients. The peripheral blood methanol concentrations of the three patients were 307.76 mg/L, 354.80 mg/L and 454.14 mg/L when they were admitted to the hospital. The raw and auxiliary materials were analyzed for volatile organic components. Methyl acetate was detected in the finished glue, synthetic resin and compound machine post glue in the glue room, and the relative percentages were 23.05%, 32.79% and 31.68%, respectively. Through comprehensive analysis, it was judged that this incident was an acute occupational methyl acetate poisoning incident, and 3 workers were poisoned.
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Affiliation(s)
- S H Tang
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Key Laboratory of Occupational Environment and Health, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - C Zhang
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Key Laboratory of Occupational Environment and Health, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - L L Zhou
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Key Laboratory of Occupational Environment and Health, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - Y Q Li
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Key Laboratory of Occupational Environment and Health, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - S X Xu
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Key Laboratory of Occupational Environment and Health, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
| | - Z Wang
- Guangzhou Twelfth People's Hospital, Guangzhou Occupational Disease Prevention and Treatment Hospital, Key Laboratory of Occupational Environment and Health, Guangzhou Twelfth People's Hospital, Guangzhou 510620, China
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Xu SX, Zhang SD, Hu JJ, Tao Y, Xie YQ, Lin HS, Zhou WZ, Lin H, Ye C, Liang YB. [The distribution of peripheral anterior synechiae in patients with primary angle-closure glaucoma]. Zhonghua Yan Ke Za Zhi 2021; 57:666-671. [PMID: 34865403 DOI: 10.3760/cma.j.cn112142-20200925-00619] [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: 06/13/2023]
Abstract
Objective: To describe the distribution and characteristics of peripheral anterior synechiae (PAS) in patients with primary angle-closure glaucoma (PACG). Methods: Retrospective case study. A total of 285 PACG patients (406 eyes) diagnosed in the Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University from January 2017 to August 2019 were included. They were 102 males and 183 females, with a median age of 67 years old (range, 21 to 95 years old). The PAS range was detected by gonioscopy examination, and the frequency distribution of PAS at 12 clock points was counted by clockwise. The PAS distribution at the middle point of PAS with continuous distribution and ≤6 clock points was assessed. Results: In all cases, PAS of the right eye was concentrated at 11:00 to 4:00 regions [range, 62.0% (129/208) to 78.8% (164/208)]. PAS of the left eye was concentrated at 7:00 to 1:00 regions [range, 50.0% (99/198) to 75.8% (150/198)]. When the PAS range of the atrial angle was ≤6 clock regions, it was mainly at 12:00 to 3:00 [range, 58.3% (74/127) to 67.7% (86/127)] in the right eye and at 10:00 to 12:00 [range, 54.8% (68/124) to 66.1% (82/124)] in the left eye. Among 121 cases (242 eyes) with both eyes involved, the PAS region was at 11:00 to 5:00 [range, 52.1% (63/121) to 79.3% (96/121)] in the right eye and at 8:00 to 1:00 [range, 50.4% (61/121) to 76.9% (93/121)] in the left eye. When the PAS range of the atrial angle was ≤6 clock regions, it was mainly at 12:00 to 4:00 [range, 53.2% (41/77) to 71.4% (55/77)] in the right eye and at 10:00 to 12:00 [range, 50.6% (39/77) to 64.9% (50/77)] in the left eye. In all cases, there were 171 cases of right eyes and 175 cases of left eyes with continuous angle PAS. The central PAS clock position of the right eye was mainly at 11:00 to 3:00 [range, 15.2% (26/171) to 24.0% (41/171)], and that of the left eye was mainly at 8:00 to 12:00 [range, 15.4% (27/175) to 20.6% (36/175)]. Among cases with both eyes involved, there were 98 cases of right eyes and 104 cases of left eyes with continuous angle PAS. The clock distribution of the middle position of the right eye angle PAS was concentrated at 11:00 to 3:00 [range, 17.3% (17/98) to 26.5% (26/98)], and that of the left eye was concentrated at 8:00 to 12:00 [range, 13.5% (14/104) to 20.2% (21/104)]. Conclusions: The PAS of PACG patients is mainly located in the upper and nasal sides, and the closer to the temporal side, the smaller the PAS frequency, showing a gradual downward trend. The PAS distribution of binocular angles is of obvious mirror symmetry. (Chin J Ophthalmol, 2021, 57: 666-671).
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Affiliation(s)
- S X Xu
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - S D Zhang
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - J J Hu
- The Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou 325027, China
| | - Y Tao
- The Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou 325027, China
| | - Y Q Xie
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - H S Lin
- The Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou 325027, China
| | - W Z Zhou
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - H Lin
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - C Ye
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
| | - Y B Liang
- The Eye Hospital, School of Ophthalmology and Optometry, Glaucoma Research Institute, Wenzhou Medical University, National Clinical Research Center for Ocular Diseases, Wenzhou 325027, China
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Yang Y, Xia M, Chen J, Tang SH, Xu SX, Zhao Y, Liu YM. [Application of semi-quantitative risk assessment method in occupational health risk assessment of wooden furniture manufacturing enterprises]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 37:369-373. [PMID: 31177717 DOI: 10.3760/cma.j.issn.1001-9391.2019.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the applicability of semi-quantitative risk assessment methods in wood furniture manufacturing companies. Methods: Two medium-sized wooden furniture manufactures were randomly selected as research objects, namely A company and B company. Used the Semi-Quantitative risk assessment method (the ratio method, the index method and the comprehensive method) in the "Guidelines for occupational health risk assessment of chemicals in the workplace" (GBZ/T 298-2017) to conduct occupational hygiene survey, occupational hazard factor testing and occupational health risk assessments for two wood furniture manufacturers from January to October 2018, and compared and analyzed the applicability of these three semi-quantitative risk assessment methods in wooden furniture manufacturing enterprises. Results: The occupational health status of A enterprises was worse than that of B enterprises, and the occupational health risk level was higher than that of B enterprises, and the risk level of A enterprise is 3~4, and the risk level of B enterprise is 2~3. The occupational health risk level obtained by the index method was consistent with the comprehensive method, while the risk level of some occupational disease hazards used the ratio method was inconsistent with the results of the index method and the comprehensive method. Compared with the index method and the comprehensive method, when E/OEL<0.5 or E/OEL≥2, there might be a certain fluctuation in the occupational health risk level obtained by the ratio method. Conclusion: The semi-quantitative risk assessment is more objective, comprehensive and flexible in the application of occupational health risk assessment, and can assess the occupational health risk level of chemical poisons in wood furniture manufacturing enterprises.
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Affiliation(s)
- Y Yang
- School of Public Health, Sun-Yat-sen University, Guangzhou 510080, China; Guangzhou Prevention and Treatment Hospital for Occupational Disease, Guangzhou 510620, China
| | - M Xia
- School of Public Health, Sun-Yat-sen University, Guangzhou 510080, China
| | - J Chen
- Guangzhou Prevention and Treatment Hospital for Occupational Disease, Guangzhou 510620, China
| | - S H Tang
- Guangzhou Prevention and Treatment Hospital for Occupational Disease, Guangzhou 510620, China
| | - S X Xu
- Guangzhou Prevention and Treatment Hospital for Occupational Disease, Guangzhou 510620, China
| | - Y Zhao
- Guangzhou Prevention and Treatment Hospital for Occupational Disease, Guangzhou 510620, China
| | - Y M Liu
- School of Public Health, Sun-Yat-sen University, Guangzhou 510080, China; Guangzhou Prevention and Treatment Hospital for Occupational Disease, Guangzhou 510620, China
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Sun JP, Wang ZC, Liu ZY, Xu SX, Eto T, Sui Y, Wang BS, Uwatoko Y, Cao GH, Cheng JG. Effect of pressure on the self-hole-doped superconductor RbGd 2Fe 4As 4O 2. J Phys Condens Matter 2019; 31:044001. [PMID: 30543523 DOI: 10.1088/1361-648x/aaf0b9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
RbGd2Fe4As4O2 is a newly discovered self-hole-doped stoichiometric superconductor, which has a hybrid structure with separated double FeAs layers and exhibits a high superconducting transition temperature T c = 35 K. Here, we report the effect of pressure (P) on its T c and normal-state transport properties by measuring the temperature dependence of resistivity ρ(T) under various pressures up to 14 GPa with a cubic anvil cell apparatus. We found that the T c is suppressed monotonically to ca. 12.5 K upon increasing pressure to 14 GPa with a slope change of T c(P) at around 4 GPa. In addition, the low-temperature normal-state ρ(T), which is proportional to T n , also evolves gradually from a non-Fermi-liquid with n = 1 at ambient pressure to a Fermi liquid with n = 2 at P ⩾ 4 GPa. Accompanying with the non-Fermi-liquid to Fermi-liquid crossover, the quadratic temperature coefficient of resistivity, which reflects the effective mass of charge carriers, also experiences a significant reduction as commonly observed in the vicinity of a magnetic quantum critical point (QCP). Our results indicate that the stoichiometric RbGd2Fe4As4O2 at ambient pressure might be located near a QCP such that the enhanced critical spin fluctuations lead to high-T c superconductivity. The application of pressure should broaden the electronic bandwidth and weaken the spin fluctuations, and then restore a Fermi-liquid ground state with lower T c.
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Affiliation(s)
- J P Sun
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Xu SX, Huang SW, Su GF. [The genetic factors of non-response to anti-vascular endothelial growth factor therapy]. Zhonghua Yan Ke Za Zhi 2018; 54:873-878. [PMID: 30440160 DOI: 10.3760/cma.j.issn.0412-4081.2018.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The response to anti-vascular endothelial growth factor (VEGF) treatment is variable. It is generally measured in terms of changes in correlated functional and/or anatomical outcomes, and patients are then classified as optimal response, poor response and non-response. The precise cause of non-response remains undetermined. A variety of factors could account for poor or non-response to anti-VEGF therapy, such as age, baseline vision, disease course, lesion characteristics and genomic polymorphism. At the present time, many studies on the genetic factors of non-response or poor response to anti-VEGF treatment mainly focus on VEGF genes (VEGF-A, VEGFR-2), complement factor H (CFH), age-related maculopathy susceptibility 2 (LOC387715/ARMS2), high temperature factor A-1 (HTRA1), interleukin-related gene (IL-8 rs4073) and so forth. It is still worthy of further investigations that how to assess genetic reasons for non-response or poor response, so that we can provide individualized treatment sequences and predict the response to anti-VEGF therapy. (Chin J Ophthalmol, 2018, 54:873-878).
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Affiliation(s)
- S X Xu
- Eye Center of the Second Hospital, Jilin University, Changchun 130022, China
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Ling WJ, Rong WF, Chen PX, Tang SH, Xu SX, Zhang H, Liu YM. [Study on determination of ethylal in workplace air by gas chromatography]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2018; 36:471-473. [PMID: 30248754 DOI: 10.3760/cma.j.issn.1001-9391.2018.06.024] [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: A solvent desorption-gas chromatography method for determination of ethylal in workplace air has been established. Methods: Ethylal in workplace air was collected by activated carbon tube and desorbed with carbon disulfide, and the desorption solutions were analysed by capillary column GC with FID detector. Results: The method presented a good linearity in the range of 0.87~34 800.00 mg/L of ethylal in the standard solution, with the correlation coefficient being r=0.999 7. The limit of detection and the limit of quantification of this method were respectively 0.20 mg/L and 0.80 mg/L, and the minimum detectable concentration and the minimum quantification concentration of this method were respectively 0.17 mg/m(3) and 0.60 mg/m(3) per 1.50 L of air.The within-run precision of the method was 2.93%-6.20%, and the between-run precision 3.67%-6.44%. The desorption efficiency between 94.22%-97.27%. Ethylal in activated carbon tube could be kept at least 7 days at room temperature without significant loss. Conclusion: The method could be used for determination of ethylal in workplace air.
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Affiliation(s)
- W J Ling
- Guangzhou Prevention and Treatment Center for Occupational Diseases, Guangzhou 510620, China
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Xu LY, Wang MY, Shi XZ, Yu QB, Shi YJ, Xu SX, Sun WX. Effect of long-term organic fertilization on the soil pore characteristics of greenhouse vegetable fields converted from rice-wheat rotation fields. Sci Total Environ 2018; 631-632:1243-1250. [PMID: 29727949 DOI: 10.1016/j.scitotenv.2018.03.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 03/05/2018] [Accepted: 03/07/2018] [Indexed: 06/08/2023]
Abstract
The shift from rice-wheat rotation (RWR) to greenhouse vegetable soils has been widely practiced in China. Several studies have discussed the changes in soil properties with land-use changes, but few studies have sought to address the differences in soil pore properties, especially for fields based on long-term organic fertilization under greenhouse vegetable system from RWR fields. This study uses the X-ray computed tomography (CT) scanning and statistical analysis to compare the long-term effects of the conversion of organic greenhouse vegetable fields (over one year, nine years, and fourteen years) from RWR fields on the soil macropore structure as well as the influencing factors from samples obtained in Nanjing, Jiangsu, China, using the surface soil layer and triplicate samples. The results demonstrated that the macropore structure became more complex and stable, with a higher connectivity, fractal dimension (FD) and a lower degree of anisotropy (DA), as the greenhouse vegetable planting time increased. The total topsoil macroporosity increased considerably, but the rate of increase gradually decelerated with time. The transmission pores (round pores ranging from 50 to 500μm) increased with time, but the biopores (>2000μm) clearly decreased after nine years of use as greenhouse vegetable fields. Soil organic matter (OM) has a significant relationship with the soil pore structure characteristics, especially for the transmission pores. In addition, organic fertilization on the topsoil had a short-term effect on the pores, but the effect stabilized and had a weak influence on the pores over longer periods. These results suggested that organic fertilization was conducive for controlling soil degradation regarding it physical quality for water and oxygen availability in the short term.
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Affiliation(s)
- L Y Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - M Y Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| | - X Z Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Q B Yu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Y J Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - S X Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - W X Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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12
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Yang M, Xu SX, Qin HY, Zhang H, Yi H, Han HJ, Dong DT, Zhang YH, Li SL. [Genetic Polymorphisms of 17 Y-STR Loci in Nantong Han Population]. Fa Yi Xue Za Zhi 2017; 33:383-387. [PMID: 29219270 DOI: 10.3969/j.issn.1004-5619.2017.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To analyze the genetic phenotypes of Nantong Han population and evaluate the application value of 17 Y-STR loci in Nantong population. METHODS The peripheral blood samples were collected from 343 unrelated Nantong Han males and the genomic DNA were extracted by Chelex-100 method. Genotyping was performed using the AmpFℓSTR Yfiler™ Kit. The results were compared with other 12 Han populations, including Anhui, Jiangsu, Jiangxi, Shandong, Shanghai, Zhejiang (1), Lanzhou, Nanyang, Luzhou, Mudanjiang, Shanxi and Zhejiang (2), and 9 minority populations (Mongol, Xibe, Tibetan in Lhasa, Tibetan in Qinghai, Kazak, Uighur, Manchu, Paiwan in Taiwan and Tujia). RESULTS A total of 327 different haplotypes were found in 17 Y-STR loci in Nantong Han population. The haplotype diversity (HD) was 0.999 7. The Rst value between Nantong Han and other Chinese populations ranged from -0.000 6 to 0.263 5. The multidimensional scaling results showed that Nantong Han population had no significant differences between most of the Han populations, but had significant differences between most of Chinese minority populations. CONCLUSIONS Seventeen Y-STR loci can be a powerful tool for forensic application because of its high polymorphism in Nantong Han population.
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Affiliation(s)
- M Yang
- School of Life Science, Fudan University, Shanghai 200438, China.,Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - S X Xu
- School of Life Science, Fudan University, Shanghai 200438, China
| | - H Y Qin
- Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - H Zhang
- Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - H Yi
- Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - H J Han
- Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - D T Dong
- Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - Y H Zhang
- Nantong Municipal Public Security Bureau, Nantong 226007, China
| | - S L Li
- School of Life Science, Fudan University, Shanghai 200438, China
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13
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Han Y, Zhao BW, Li SY, Lyu JG, Shou JD, Xu HS, Lou HY, Xu LL, Gao L, Xu SX, Zhu J. [Diagnostic values of BRAF(V600E) mutation analysis and Bethesda system for reporting thyroid cytopathology in thyroid nodules with TIRADS 4 and 5]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:686-691. [PMID: 28910894 DOI: 10.3760/cma.j.issn.1673-0860.2017.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the diagnostic efficacies of BRAF(V600E) testing and Bethesda system for reporting thyroid cytopathology (BSRTC) in thyroid nodules with thyroid imaging reporting and data system (TIRADS) category 4 and 5. Methods: A total of 187 thyroid nodules in 187 patients underwent the examinations of ultrasound-guided fine needle aspiration cytology (FNAC) and BRAF(V600E) mutation were analyzed retrospectively. Receive operating characteristic (ROC) curve was used to investigate the diagnostic values of both methods and the clinical application of BRAF(V600E) combined with BSRTC was evaluated. SPSS17.0 software was used to analyze the data. Results: Among 187 thyroid nodules, 123 were malignant nodules confirmed with histopathological examination and 64 benign nodules determined by FNAC, histopathological examination, or long-term follow-up. The sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of BRAF(V600E) test were better than those of BSRTC [69.1%, 98.4%, 98.8%, 62.4%(χ(2)=77.3, P=0.000) vs 62.6%, 93.8%, 95.1%, 56.6%(χ(2)=54.4, P=0.000)]. While the sensitivity, specificity, PPV and NPV of the combined test of BRAF(V600E) and BSRTC for diagnosis of malignant thyroid nodules were 87.8%, 92.2%, 95.6%, 79.7%(χ(2)=112.6, P=0.000), respectively. The area under the ROC curve for the combined test was higher than that for each of tests (0.900 vs 0.858 or 0.838). Conclusions: The combined test of BRAF(V600E) mutation and BSRTC has a higher diagnostic efficacy for malignant thyroid nodules compared with BRAF(V600E) mutation or BSRTC alone.
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Affiliation(s)
- Y Han
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - B W Zhao
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - S Y Li
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - J G Lyu
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - J D Shou
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - H S Xu
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - H Y Lou
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - L L Xu
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - L Gao
- Department of Head and Neck Surgery, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - S X Xu
- Department of Pathology, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
| | - J Zhu
- Department of Diagnostic Ultrasound, Sir Run Run Shaw Hospital of Zhejiang University College of Medicine & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, China
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14
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Shi L, Cao HM, Li Y, Xu SX, Zhang Y, Zhang Y, Jin ZF. Electroacupuncture improves neurovascular unit reconstruction by promoting collateral circulation and angiogenesis. Neural Regen Res 2017; 12:2000-2006. [PMID: 29323038 PMCID: PMC5784347 DOI: 10.4103/1673-5374.221156] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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] [Indexed: 11/28/2022] Open
Abstract
Acupuncture at Shuigou (GV26) shows good clinical efficacy for treating stroke, but its mechanism remains poorly understood. In this study, a cerebral infarction model of ischemia/reperfusion injury received electroacupuncture at GV26 (15 Hz and 1 mA, continuous wave [biphasic pulses], for 5 minutes). Electroacupuncture effectively promoted regional cerebral blood flow on the infarct and non-infarct sides, increased infarct lesions, lectin, and number of blood vessels, upregulated von Willebrand factor and cell proliferation marker Ki67 expression, and diminished neurological severity score. These findings confirm that electroacupuncture at GV26 promotes establishment of collateral circulation and angiogenesis, and improves neurological function.
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Affiliation(s)
- Lei Shi
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Hong-Mei Cao
- National Engineering Research Center for Beijing Biochip Technology, Beijing, China
| | - Ying Li
- Shaanxi University of Chinese Medicine, Xianyang, Shaanxi Province, China
| | - Shi-Xin Xu
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yan Zhang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yang Zhang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Zhe-Feng Jin
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
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15
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Anantha RV, Mazzuca DM, Xu SX, Porcelli SA, Fraser DD, Martin CM, Welch I, Mele T, Haeryfar SMM, McCormick JK. T helper type 2-polarized invariant natural killer T cells reduce disease severity in acute intra-abdominal sepsis. Clin Exp Immunol 2014; 178:292-309. [PMID: 24965554 DOI: 10.1111/cei.12404] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2014] [Indexed: 01/09/2023] Open
Abstract
Sepsis is characterized by a severe systemic inflammatory response to infection that is associated with high morbidity and mortality despite optimal care. Invariant natural killer T (iNK T) cells are potent regulatory lymphocytes that can produce pro- and/or anti-inflammatory cytokines, thus shaping the course and nature of immune responses; however, little is known about their role in sepsis. We demonstrate here that patients with sepsis/severe sepsis have significantly elevated proportions of iNK T cells in their peripheral blood (as a percentage of their circulating T cells) compared to non-septic patients. We therefore investigated the role of iNK T cells in a mouse model of intra-abdominal sepsis (IAS). Our data show that iNK T cells are pathogenic in IAS, and that T helper type 2 (Th2) polarization of iNK T cells using the synthetic glycolipid OCH significantly reduces mortality from IAS. This reduction in mortality is associated with the systemic elevation of the anti-inflammatory cytokine interleukin (IL)-13 and reduction of several proinflammatory cytokines within the spleen, notably interleukin (IL)-17. Finally, we show that treatment of sepsis with OCH in mice is accompanied by significantly reduced apoptosis of splenic T and B lymphocytes and macrophages, but not natural killer cells. We propose that modulation of iNK T cell responses towards a Th2 phenotype may be an effective therapeutic strategy in early sepsis.
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Affiliation(s)
- R V Anantha
- Division of General Surgery, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada; Department of Microbiology and Immunology, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
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16
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Shi JF, Xu SX, He P, Xi ZH. Expression of carcinoembryonic antigen-related cell adhesion molecule 1(CEACAM1) and its correlation with angiogenesis in gastric cancer. Pathol Res Pract 2014; 210:473-6. [DOI: 10.1016/j.prp.2014.03.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Accepted: 03/10/2014] [Indexed: 12/30/2022]
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17
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Lu X, Zhang M, Yang JX, Xu SX, Gan JX. Preliminary Experience of Assessment of Intracranial Lesions by Ultrasound in Multiple Trauma Patients Undergoing Craniectomy. HONG KONG J EMERG ME 2013. [DOI: 10.1177/102490791302000105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objective To explore the feasibility and reliability of B-mode ultrasound for assessment of intracranial lesions in multiple trauma patients who had undergone craniectomy. Design ingle-centre study. Setting A 16-bed emergency intensive care unit (ICU) in the emergency department of 2nd Affiliated Hospital of Zhejiang University School of Medicine from July 2006 to June 2010. Methods We retrospectively analysed 13 multiple trauma patients with severe head injury admitted to the emergency department of 2nd Affiliated Hospital of Zhejiang University School of Medicine. All 13 patients were admitted to the ICU after craniectomy and received mechanical ventilation. Computed tomography (CT) were conducted when patients' consciousness, pupillary size, light reflex changed apparently, or if the bone window tension and the intracranial pressure increased unexpectedly. Head ultrasonography was performed within 2 hours of CT scanning. Results Ultrasonography revealed 18 pathological changes in the 13 patients. CT and a second operation helped to identify 23 pathological changes. The results of B-mode ultrasound were compared with those of CT and the coincidence rate was 78.3%, with no significant difference in the diagnosis of delayed haematoma or midline shift (Kappa=0.898, p<0.05). Conclusions Transcranial ultrasonography may be a useful tool for monitoring post-operation intracranial lesions in multiple trauma patients with severe head injury. It is an effective supplement to CT.
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18
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Abstract
Abstract
The effects on rat striatal dopamine receptors after chronic nicotine administration (3 and 12 mg kg−1 day−1), and after withdrawal from chronic nicotine (12 mg kg−1 day−1), were studied. After 21 days of continuous minipump infusion, the control (saline) and nicotine-treated rats were killed. The nicotine-withdrawal rats were killed on day 28, 7 days after pump removal. Radioligand studies were performed to determine D1 ([3H]SCH23390) and D2 ([3H]spiperone) striatal dopamine receptor affinity (Kd) and maximum binding (Bmax). Dopamine inhibition of antagonist binding at 3 concentrations and the effect of 0·3 Mm GTP on binding affinity were examined. No statistically significant differences between control and nicotine treatment or withdrawal groups were noted in either D1 or D2 receptor Kd or Bmax. Although nicotine has been shown to affect nigrostriatal dopamine release, chronic treatment does not appear to alter overall striatal dopaminergic receptor binding parameters.
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Affiliation(s)
- D G Kirch
- Neuropsychiatry Branch, National Institute of Mental Health, Rockville, Maryland 20857
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19
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Wu JS, Sheng L, Wang SH, Gu J, Ma YF, Zhang M, Gan JX, Xu SW, Zhou W, Xu SX, Li Q, Jiang GY. The impact of clinical risk factors in the conversion from acute lung injury to acute respiratory distress syndrome in severe multiple trauma patients. J Int Med Res 2008; 36:579-86. [PMID: 18534142 DOI: 10.1177/147323000803600325] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are different stages of the same disease, the aggravated stage of ALI leading to ARDS. Patients with ARDS have higher hospital mortality rates and reduced long-term pulmonary function and quality of life. It is, therefore, important to prevent ALI converting to ARDS. This study evaluated 17 risk factors potentially associated with the conversion from ALI to ARDS in severe multiple trauma. The results indicate that the impact of pulmonary contusion, APACHE II score, gastrointestinal haemorrhage and disseminated intravascular coagulation may help to predict conversion from ALI to ARDS in the early phase after multiple-trauma injury. Trauma duration, in particular, strongly impacted the short- and long-term development of ALI. Being elderly (aged > or = 65 years) and undergoing multiple blood transfusions in the early phase were independent risk factors correlated with secondary sepsis, deterioration of pulmonary function and transfusion-related acute lung injury due to early multiple fluid resuscitation.
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Affiliation(s)
- J S Wu
- Trauma Centre of the Emergency Department, The Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jiefang Road, Hangzhou, Zhejiang Province, China
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20
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Xu SX, Wang HL, Fan X, Sun LD, Yang S, Wang PG, Xiao FL, Gao M, Cui Y, Ren YQ, Du WH, Quan C, Zhang XJ. The familial risk of acne vulgaris in Chinese Hans ? a case-control study. J Eur Acad Dermatol Venereol 2007; 21:602-5. [PMID: 17447973 DOI: 10.1111/j.1468-3083.2006.02022.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Acne is a chronic inflammatory disease of the pilosebaceous follicles. Recent studies bring us increasing evidences that hereditary factors play an important but indirect role in acne. OBJECTIVE To investigate the possible role of genetic factors in the pathogenesis of acne vulgaris in Chinese Han ethnic group. PATIENTS AND METHODS Volunteers of 975 acne cases and 580 controls were included, contributing 3009 and 1825 first-degree relatives, respectively. One thousand and eighty-five first-degree relatives of acne cases were affected with facial acne. This compared with 223 first-degree relatives of non-acne controls. The odds ratio was used to estimate the relative risk for acne vulgaris associated with having an affected first-degree relative. RESULTS The risk of acne vulgaris occurring in a relative of a patient with acne vulgaris was significantly greater than for the relative of an unaffected individual (odds ratio 4.05, 95% confidence interval (CI): 3.45-4.76, P<0.001). CONCLUSION Our study suggests that familial factors are important in determining individual susceptibility to acne vulgaris.
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Affiliation(s)
- S X Xu
- Institute of Dermatology & Department of Dermatology at No.1 Hospital, Anhui Medical University, Hefei, China, and Key Laboratory of Genome Research in Hefei, Anhui Province, China
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21
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Chen RD, Zimmermann E, Xu SX, Liu GS, Smith AG. Characterization of an anther- and tapetum-specific gene and its highly specific promoter isolated from tomato. Plant Cell Rep 2006; 25:231-40. [PMID: 16491381 DOI: 10.1007/s00299-005-0056-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2005] [Revised: 08/15/2005] [Accepted: 08/25/2005] [Indexed: 05/06/2023]
Abstract
A full-length genomic clone of 2,233 bp long containing an anther- and tapetum-specific gene TomA108 was isolated and characterized from tomato. The gene was present in one copy per haploid genome. The isolated clone contained 5' and 3' untranslated regions of 810 and 170 nucleotides, respectively and a single intron with highly repetitive sequences. The cDNA encoded the protein with an apparent mass of 10.6 kDa and a pI (isoelectric point) of 5.3. It was cysteine-rich and had an N-terminal hydrophobic domain with characteristics of a secretory signal. Amino acid sequence comparisons demonstrated that the protein was closely related to a family of cereal seed storage proteins and protease inhibitors. The fusion of beta-glucuronidase to the TomA108 promoter demonstrated that the promoter was highly active from early-meiosis to free microspores production in tapetum of tobacco. This strong and highly specific promoter can be potentially used to generate male sterility for efficient production of plant hybrids.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Cysteine/chemistry
- DNA, Complementary/genetics
- DNA, Complementary/isolation & purification
- Enzyme Inhibitors/chemistry
- Flowers/genetics
- Gene Expression Regulation, Plant
- Genes, Plant/genetics
- Genome, Plant/genetics
- Glucuronidase/metabolism
- Solanum lycopersicum/genetics
- Molecular Sequence Data
- Open Reading Frames/genetics
- Organ Specificity
- Plant Proteins/chemistry
- Plants, Genetically Modified
- Promoter Regions, Genetic/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Regulatory Sequences, Nucleic Acid/genetics
- Sequence Alignment
- Sequence Homology, Amino Acid
- Nicotiana/cytology
- Nicotiana/enzymology
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Affiliation(s)
- R D Chen
- Department of Biochemistry, University of Saskatc Hewan, 107 Wiggins Road, Saskatoon, SK S7N 5E5, Canada. [corrected]
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22
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Shu QY, Liu GS, Xu SX, Li XF, Li HJ. Genetic transformation of Leymus chinensis with the PAT gene through microprojectile bombardment to improve resistance to the herbicide Basta. Plant Cell Rep 2005; 24:36-44. [PMID: 15657763 DOI: 10.1007/s00299-004-0908-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2004] [Revised: 11/15/2004] [Accepted: 11/24/2004] [Indexed: 05/16/2023]
Abstract
Chinese leymus [Leymus chinensis (Trin.) Tzvel.] is a perennial grass (tribe Gramineae) that is widely distributed throughout northern China and Mongolia where it is produced as a forage product. Severe production losses due to weed growth have serious economic consequences, and as non-selective herbicides not only kill the weeds but are also harmful to this forage grass, the introduction of a foreign gene for resistance to the herbicide Basta is necessary since this species lacks herbicide resistance. We have investigated the transformation of a gene for phosphinothricin acetyltransferase (PAT) through microprojectile bombardment in Chinese leymus. Calli from immature inflorescences cultured on N6 medium supplemented with 2.0 mg/l 2,4-dichlorophenoxyacetic acid (2,4-D) and 5.0 mg/l of glutamine were bombarded. The bombarded calli survived on selection medium with 1.0 mg/l of phosphinothricin (PPT). Twenty-three plantlets regenerated from resistant calli on differentiation medium supplemented with 1.0 mg/l 6-benzylaminopurine, 1.0 mg/l kinetin, and 1.0 mg/l PPT, and five of these regenerated plantlets survived on rooting medium with 1.0 mg/l of PPT. PCR and Southern blotting analyses indicated that the PAT gene had been integrated into the genomes of two Chinese leymus plantlets and that the gene was stably transferred to its clonal offsprings. There were no other phenotypic effects associated with transgene expression during vegetative growth except tolerance to the herbicide Basta.
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Affiliation(s)
- Q Y Shu
- Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P.R. China
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23
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Sharif NA, Xu SX. Binding affinities of ocular hypotensive beta-blockers levobetaxolol, levobunolol, and timolol at endogenous guinea pig beta-adrenoceptors. J Ocul Pharmacol Ther 2004; 20:93-9. [PMID: 15117564 DOI: 10.1089/108076804773710759] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The current study determined the relative affinities and selectivities of numerous beta-adrenoceptor antagonists at the endogenous beta(1)- and beta(2)-adrenoceptors in guinea pig heart and lung, respectively, using [(3)H]-CGP12177. Specific binding of [(3)H]-CGP12177 comprised 80 +/- 0.2% (n = 11) and 94 +/- 0.2% (n = 16) of the total binding in washed heart and lung homogenates, respectively. Concentration-dependent displacement of [(3)H]-CGP12177 binding from beta-adrenoceptors in both preparations was observed with nine different beta-adrenoceptor antagonists. Levobetaxolol, betaxolol, CGP-20712A, levobunolol, and timolol yielded bi-phasic (two-site-fit) competition curves in the heart, while CGP-20712A, ICI-118551 and levobunolol produced bi-phasic curves in the lung preparation. The high-affinity component of [(3)H]-CGP12177 binding in the heart and lung reflected binding to beta(1)-receptors and beta(2)-receptors, respectively. The binding inhibition parameters (IC(50)s) for displacement of [(3)H]-CGP12177 from these predominantly high-affinity sites were: levobetaxolol (24.9 +/- 1.6 nM heart, 4810 +/- 367 nM lung), racemic betaxolol (37.9 +/- 8.7 mM heart; 8840 +/- 424 mM lung), CGP-20712A (4.6 +/- 0.9 nM heart; 171,000 +/- 109,000 nM lung), ICI-118551 (9230 +/- 3240 nM heart; 2.9 +/- 0.6 nM lung), levobunolol (42 +/- 15 nM heart, 0.3 +/- 0.2 nM lung), (l)-timolol (3.1 nM heart, 2.9 +/- 1.5 nM lung), ICI-215001 (5840 +/- 114 nM heart; 26100 +/- 3200 nM lung), BRL-37344 (83,300 +/- 2660 nM heart; 13,200 +/- 1250 lung). These data indicated that while levobetaxolol and betaxolol possessed a 193-233-fold selectivity for beta(1)-receptors, levobunolol exhibited a 140-fold beta(2)-receptor selectivity and (l)-timolol was essentially nonselective.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology, Alcon Research, Ltd., Fort Worth, TX 76134, USA.
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Sharif NA, Xu SX. Pharmacological characterization and identification of EP3 prostanoid receptor binding sites in hamster uterus homogenates. J Pharm Pharmacol 2004; 56:197-203. [PMID: 15005878 DOI: 10.1211/0022357022557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The pharmacological properties of [(3)H]-prostaglandin E(2) ([(3)H]-PGE(2)) binding to washed homogenates of hamster uterus were determined. Scatchard analysis of competition data yielded dissociation constants (K(d)s) of 30.9 +/- 5.6 nM (n = 3) and apparent receptor density (B(max)) of 25.25 +/- 1.89 pmol g(-1) wet weight tissue (74 +/- 8% specific binding). Competition studies yielded the following affinity parameters (K(i)) for various prostanoids: GR63799X = 13 4 nM; PGE(2) = 17 +/- 3 nM; sulprostone = 64 +/- 5 nM; enprostil = 67 +/- 3 nM; misoprostol = 124 +/- 15 nM; cloprostenol = 187 +/- 33 nM; carba-prostacyclin = 260 +/- 167 nM; iloprost = 555 +/- 162 nM; PGF(2 alpha) = 767 +/- 73 nM; PGD(2) > 3560 nM; fluprostenol = 11 790 +/- 2776 nM; RS93520 = 21 558 +/- 14 228 nM. These data closely matched the pharmacological profile of previously described EP(3) receptors such as in bovine corpus luteum (BCLM) and the cloned mammalian EP(3) receptors. The high correlation between the current hamster uterus pharmacology data vs the EP(3) receptor binding in BCLM (r = 0.94; P < 0.0001), vs cloned human EP(3) receptor (r = 0.94, P < 0.0001), vs the cloned mouse EP(3) receptor binding (r = 0.78; P < 0.002), vs cloned rat EP(3) receptor (r = 0.9, P < 0.0004), and vs EP(3) receptor-mediated functional responses (r = 0.72, P < 0.02) substantiated the conclusion that the hamster uterus contains EP(3) receptor binding sites.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Research Ltd, South Freeway, Fort Worth, TX 76134-2099, USA.
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Zhao TB, Ning HX, Zhu SS, Sun P, Xu SX, Chang ZJ, Zhao XQ. Cloning of hypoxia-inducible factor 1alpha cDNA from a high hypoxia tolerant mammal-plateau pika (Ochotona curzoniae). Biochem Biophys Res Commun 2004; 316:565-72. [PMID: 15020255 DOI: 10.1016/j.bbrc.2004.02.087] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2004] [Indexed: 10/26/2022]
Abstract
Hypoxia-inducible factor 1 is a transcription factor composed of HIF-1alpha and HIF-1beta. It plays an important role in the signal transduction of cell response to hypoxia. Plateau pika (Ochotona curzoniae) is a high hypoxia-tolerant and cold adaptation species living only at 3000-5000 m above sea level on the Qinghai-Tibet Plateau. In this study, HIF-1alpha cDNA of plateau pika was cloned and its expression in various tissues was studied. The results indicated that plateau pika HIF-1alpha cDNA was highly identical to those of the human (82%), bovine (89%), mouse (82%), and Norway rat (77%). The deduced amino acid sequence (822bp) showed 90%, 92%, 86%, and 86% identities with those of the human, bovine, house mouse, and Norway rat, respectively. Northern blot analyses detected two isoforms named pLHIF-1alpha and pSHIF-1alpha. The HIF-1alpha mRNA was highly expressed in the brain and kidney, and much less in the heart, lung, liver, muscle, and spleen, which was quite different from the expression pattern of mouse mRNA. Meanwhile, a new variant of plateau pika HIF-1alpha mRNA was identified by RT-PCR and characterized. The deduced protein, composed of 536 amino acids, lacks a part of the oxygen-dependent degradation domain (ODD), both transactivation domains (TADs), and the nuclear localization signal motif (NLS). Our results suggest that HIF-1alpha may play an important role in the pika's adaptation to hypoxia, especially in brain and kidney, and pika HIF-1alpha function pattern may be different from that of mouse HIF-1alpha. Furthermore, for the high ratio of HIF-1alpha homology among the animals, the HIF-1alpha gene may be a good phylogenetic performer in recovering the true phylogenetic relationships among taxa.
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Affiliation(s)
- T B Zhao
- Department of Biological Sciences and Biotechnology, Tsinghua Institute of Genome Research, Tsinghua University, Beijing 100084, PR China.
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26
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Sharif NA, Kelly CR, Crider JY, Williams GW, Xu SX. Ocular Hypotensive FP Prostaglandin (PG) Analogs: PG Receptor Subtype Binding Affinities and Selectivities, and Agonist Potencies at FP and Other PG Receptors in Cultured Cells. J Ocul Pharmacol Ther 2003; 19:501-15. [PMID: 14733708 DOI: 10.1089/108076803322660422] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.7] [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: 11/13/2022] Open
Abstract
Natural prostaglandins (PGs) such as PGD2, PGE2, PGF2(2alpha), and PGI2 exhibited the highest affinity for their respective cognate receptors, but were the least selective agents when tested in receptor binding assays. Travoprost acid ([+]-fluprostenol) was the most FP-receptor-selective compound, exhibiting a high affinity (Ki = 35 +/- 5 nM) for the FP receptor, and minimal affinity for DP (Ki = 52,000 nM), EP1 (Ki = 9540 nM), EP3 (Ki = 3501 nM), EP4 (Ki = 41,000 nM), IP (Ki > 90,000 nM), and TP (Ki = 121,000 nM) receptors. Travoprost acid was the most potent PG analog tested in FP receptor functional phosphoinositide turnover assays in the following cell types: human ciliary muscle (EC50 = 1.4 nM), human trabecular meshwork (EC50 = 3.6 nM), and mouse fibroblasts and rat aortic smooth muscle cells (EC50 = 2.6 nM). Although latanoprost acid exhibited a relatively high affinity for the FP receptor (Ki = 98 nM), it had significant functional activity at FP (EC50 = 32-124 nM) and EP1 (EC50 = 119 nM) receptors. Bimatoprost acid was less selective, exhibiting a relatively high affinity for the FP (Ki = 83 nM), EP1 (Ki = 95 nM), and EP3 (Ki = 387 nM) receptors. Bimatoprost acid exhibited functional activity at the EP1 (EC50 = 2.7 nM) and FP (EC50 = 2.8-3.8 nM in most cells) receptors. Bimatoprost (nonhydrolyzed amide) also behaved as an FP agonist at the cloned human FP receptor (EC50 = 681 nM), in h-TM (EC50 = 3245 nM) and other cell types. Unoprostone and S-1033 bound with low affinity (Ki = 5.9 microM to > 22 microM) to the FP receptor, were not selective, but activated the FP receptor. In conclusion, travoprost acid has the highest affinity, the highest FP-receptor-selectivity, and the highest potency at the FP receptor as compared to the other ocular hypotensive PG analogs known so far, including free acids of latanoprost, bimatoprost, and unoprostone isopropyl ester.
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MESH Headings
- Amides
- Animals
- Aorta/cytology
- Aorta/drug effects
- Bimatoprost
- Binding, Competitive/drug effects
- Binding, Competitive/physiology
- Cattle
- Cell Line
- Ciliary Body/cytology
- Ciliary Body/drug effects
- Clinical Trials as Topic
- Cloprostenol/analogs & derivatives
- Cloprostenol/chemistry
- Cloprostenol/metabolism
- Cloprostenol/pharmacology
- Dinoprost/analogs & derivatives
- Dinoprost/pharmacology
- Drug Evaluation, Preclinical
- Fibroblasts/drug effects
- Humans
- Intraocular Pressure/drug effects
- Intraocular Pressure/physiology
- Kidney/cytology
- Latanoprost
- Lipid Metabolism
- Lipids/pharmacology
- Mice
- Prodrugs/chemistry
- Prodrugs/metabolism
- Prodrugs/pharmacology
- Prostaglandins/pharmacology
- Prostaglandins F, Synthetic/chemistry
- Prostaglandins F, Synthetic/pharmacology
- Prostaglandins, Synthetic/chemistry
- Prostaglandins, Synthetic/metabolism
- Prostaglandins, Synthetic/pharmacology
- Radioligand Assay
- Rats
- Receptors, Prostaglandin/agonists
- Receptors, Prostaglandin/classification
- Receptors, Prostaglandin/drug effects
- Receptors, Prostaglandin/physiology
- Receptors, Prostaglandin E/drug effects
- Receptors, Prostaglandin E, EP1 Subtype
- Receptors, Prostaglandin E, EP3 Subtype
- Second Messenger Systems/drug effects
- Second Messenger Systems/physiology
- Signal Transduction/drug effects
- Signal Transduction/physiology
- Stereoisomerism
- Trabecular Meshwork/cytology
- Trabecular Meshwork/drug effects
- Travoprost
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Research, Ltd., Fort Worth, TX 76134-2099, USA.
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27
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Sharif NA, Senchyna M, Xu SX. Pharmacological and molecular biological (RT-PCR) characterization of functional TP prostanoid receptors in immortalized human non-pigmented ciliary epithelial cells. J Ocul Pharmacol Ther 2002; 18:141-62. [PMID: 12002668 DOI: 10.1089/108076802317373905] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Immortalized human non-pigmented ciliary epithelial (NPE) cells (ODM-2) were shown to express the mRNA for the prostanoid TPalpha but not the TPbeta receptor using reverse transcription-polymerase chain reaction (RT-PCR). These TPalpha receptors were coupled to phospholipase C (PLC) and, thus, promoted phosphoinositide (PI) turnover. TP receptor agonists yielded the following potencies (EC50S) in the PI turnover assays: I-BOP = 8.2 +/- 1.1 nM; carbocyclic TA2 = 87.5 +/- 25.3 nM; U-44069 = 1.16 +/- 0.32 microM; U-46619 = 1.2 +/- 0.2 microM (n = 4-17). Agonists selective for other prostanoid receptor subtypes (e.g., fluprostenol and sulprostone) were inactive. The agonist effects of U-44619 and I-BOP were potently blocked, in an apparent non-competitive manner (ki = 53.9 +/- 12 nM; pA2s = 7.6-7.8; pKbs = 7.38), by the TP receptor-selective antagonist, SQ29,548, but were unaffected by other prostanoid receptor antagonists (e.g., AH6809, AL-8810). The PLC inhibitor (U73122) inhibited U-46619-induced PI turnover (IC50 = 4.3 +/- 0.6 microM). The functional potencies of the compounds stimulating or inhibiting the TP receptor-mediated PI turnover in the NPE cells correlated well with the TP receptor binding affinities of these compounds at human platelet TP receptors (r = 0.98). These studies have shown the presence of the mRNA for and the expression of functional TPalpha receptors coupled to PLC in human NPE cells. The TPalpha receptors on NPE cells may be responsible for inhibiting aqueous humor production and may help explain the intraocular pressure-lowering effects of certain TP agonists.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Research Ltd., Fort Worth, Texas 76134-2099, USA.
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28
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Crider JY, Xu SX, Sharif NA. Pharmacology of functional endogenous IP prostanoid receptors in NCB-20 cells: comparison with binding data from human platelets. Prostaglandins Leukot Essent Fatty Acids 2001; 65:253-8. [PMID: 11993717 DOI: 10.1054/plef.2001.0322] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The objective of these studies was to characterize the effects of a broad range of prostanoid agonists upon the stimulation of cAMP production in National Cancer Bank (NCB-20; mouse neuroblastoma/hamster brain hybridoma) cells. The pharmacology of these functional responses in NCB-20 cells was compared with that of the classic endogenous IP receptor present on human platelets using [3H]-iloprost binding techniques. In both assay systems, agonists from the IP prostanoid class exhibited the highest affinities and functional potencies. Specific prostanoids exhibited the following rank order of potency (EC50 +/- SEM) in stimulating cAMP production in the NCB-20 cells: carbaprostacyclin (4.3 +/- 0.9 nM) = PGI2 (6.6 +/-1.5 nM) > iloprost (75+/-13 nM) > 11-deoxy PGE, (378+/-138 nM) > misoprostol (1,243+/-48) > PGE2 (3020+/-700 nM) > ZK-118182 (7265+/-455 nM). Iloprost wasthe most potent compound in the human platelet binding assay while prostanoidsfromthe DPand EP receptor classes showed modest affinity. These studies provide functional and binding information for a broad range of both natural and synthetic prostanoid receptor ligands at the endogenous IP receptor in two different cell types.
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Affiliation(s)
- J Y Crider
- Molecular Pharmacology Unit, Alcon Research, Ltd, Forth Worth, TX 76134-2099, USA.
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29
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Zhang PC, Xu SX. [Chemical constituents from the leaves of crataegus pinnatifida Bge. var. major N.E.Br]. Yao Xue Xue Bao 2001; 36:754-7. [PMID: 12579975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
AIM To study the chemical constituents in the leaves of Crataegus pinnatifida Bge. var. major N.E.Br.. METHODS Compounds were isolated by using porous resin, silica gel, polyamide chromatographic techniques etc. Their structures were elucidated by chemical and spectroscopic methods. RESULTS Eight compounds were identified as pinnatifin I (1), quercetin (2), 3-O-beta-D-glucopyranosyl quercetin (3), 3-O-beta-D-galacopyranosyl quercetin (4), 3-O-beta-D-glucopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (5), 3-O-beta-D-galacopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (6), kaempferol (7), 7-O-alpha-L-rhamnosyl-3-O-beta-D- glucopyranosyl kaempferol (8). CONCLUSION Compound 1 is a new compound. Compound 8 was isolated from this plant for the first time.
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Affiliation(s)
- P C Zhang
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
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30
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Abstract
Four flavonoid ketohexosefuranosides, pinnatifinoside A, pinnatifinoside B, pinnatifinoside C, and pinnatifinoside D were isolated from the leaves of Crataegus pinnatifida Bge. var. major N.E.Br. Their structures were elucidated by spectroscopic analysis (UV, IR, MS and 1D, 2D NMR) and chemical evidence.
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Affiliation(s)
- P C Zhang
- Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, People's Republic of, China.
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31
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Feng XZ, Dong M, Xu SX. A new triterpenoidal saponin from Ixeris sonchifolia and its cytotoxic activity. Pharmazie 2001; 56:663-4. [PMID: 11534348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
A new triterpenoidal saponin, echinocystic acid 3-O-beta-D-glucopyranosyl-(1-->3)-alpha-L-arabinopyranoside (1), was isolated from Ixeris sonchifolia. Its structure was elucidated on the basis of full spectral data analysis and chemical methods. The cytotoxic activity of compound 1 was evaluated using the tumor cell lines of A375, Hela, and L929 in vitro.
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Affiliation(s)
- X Z Feng
- Department of Natural Product Chemistry, Shenyang Pharmaceutical University, Shenyang, P.R. China
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32
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Sharif NA, Xu SX, Crider JY, McLaughlin M, Davis TL. Levobetaxolol (Betaxon) and other beta-adrenergic antagonists: preclinical pharmacology, IOP-lowering activity and sites of action in human eyes. J Ocul Pharmacol Ther 2001; 17:305-17. [PMID: 11572462 DOI: 10.1089/108076801753162726] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The pharmacological characteristics of levobetaxolol, a single active isomer of betaxolol, were determined and compared with activities of other beta-adrenoceptor antagonists. Levobetaxolol (43-fold beta1-selective) exhibited a higher affinity at cloned human beta1 (Ki = 0.76 nM) than at beta2 (Ki = 32.6 nM) receptors, while dextrobetaxolol was much weaker at both receptors. Levobetaxolol potently antagonized functional activities at cloned human beta1 and beta2 receptors, and also at guinea pig atrial beta1, tracheal beta2 and rat colonic beta3 receptors (IC50s = 33.2 nM, 2970 nM and 709 nM, respectively). Thus, levobetaxolol was 89-times beta1-selective (vs beta2). Levobetaxolol (Ki = 16.4 nM) was more potent than dextrobetaxolol (Ki = 2.97 microM) at inhibiting isoproterenol-induced cAMP production in human non-pigmented ciliary epithelial cells. Levobunolol and (l)-timolol had high affinities at beta1 and beta2 receptors but were considerably less beta1-selective than levobetaxolol. Levo-, dextro- and racemic-betaxolol exhibited little or no affinity, except at sigma sites and Ca2+-channels (IC50s > 1 microM), at 89 other receptor/ligand binding sites. Levobetaxolol exhibited a micromolar affinity for L-type Ca2+-channels. In conscious ocular hypertensive cynomolgus monkeys, levobetaxolol was more potent than dextrobetaxolol, reducing intraocular pressure by 25.9+/-3.2% at a dose of 150 microg/eye (n = 15-30). Quantitative [3H]-levobetaxolol autoradiography revealed high levels of binding to human ciliary processes, iris, choroid/retina, and ciliary muscles. In conclusion, levobetaxolol is a potent, high affinity and beta1-selective IOP-lowering beta-adrenoceptor antagonist.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Pharmaceutical Products Research, Alcon Research, Ltd., Fort Worth, TX 76134-2099, USA.
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33
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Zhang GG, Zeng H, Xu SX. [Quantitative determination of icariin in "tangzhi shuangjiang cha" by high performance liquid chromatography]. Se Pu 2001; 19:365-6. [PMID: 12545504] [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: 02/28/2023] Open
Abstract
Icariin in "Tangzhi Shuangjiang Cha" was quantitatively determined by HPLC with ODS column, a mixture of MeOH-H2O(60:40, V/V) as mobile phase and UV detection at 270 nm. There was a good linear relationship within the range of 0.1 g/L-0.5 g/L(r = 0.9993). The average recovery was 101.4%, RSD was below 2.7%(n = 3). The method is rapid, simple, accurate and reproducible. And the method is proposed to be used for quality control of "Tangzhi Shuangjiang Cha".
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Affiliation(s)
- G G Zhang
- Shenyang Pharmaceutical University, Shenyang 110015, China.
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34
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Abstract
Five saponins, 3-O-[beta-D-glucopyranosyl (1-->2)-[beta-D-glucopyranosyl (1-->3)]-beta-D-glucopyranosyl]-oleanolic acid 28-O-beta-D-glucopyranosyl ester (aralia-saponin V), 3-O-[beta-D-glucopyranosyl (1-->2)-[beta-D-glucopyranosyl (1-->3)]-beta-D-glucopyranosyl]-echinocystic acid 28-O-beta-D-glucopyranosyl ester (aralia-saponin VI), 3-O-beta-D-glucopyranosyl (1-->2)-[beta-D-glucopyranosyl (1-->3)]-beta-D-glucopyranosyl]-hederagenin 28-O-beta-D-glucopyranosyl ester (aralia-saponin VII), 3-O-[beta-D-glucopyranosyl-(1-->3)-beta-D-glucopyranosyl-(1-->3)-[beta-D-glucopyranosyl-(1-->2)]-beta-D-glucopyranosyl]-caulophyllogenin 28-O-beta-D-glucopyranosyl ester (aralia-saponin VIII), 3-O-[beta-D-glucopyranosyl (1-->2)-[beta-D-glucopyranosyl(1-->3)]-alpha-L-arabinopyranosyl]-hederagenin 28-O-beta-D-glucopyranosyl ester (aralia-saponin IX), were isolated from the root bark of Aralia elata (Miq.) Seem., together with four known compounds. Their structures were determined on the basis of chemical and spectroscopic methods.
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Affiliation(s)
- S J Song
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
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35
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Sharif NA, Crider JY, Xu SX, McLaughlin M, Davis TL. Levobetaxolol (Betaxon): in vitro pharmacology, intraocular pressure lowering activity and autoradiographic localization of beta-adrenoceptors in human eyes. Proc West Pharmacol Soc 2001; 44:65-8. [PMID: 11793997] [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: 04/17/2023]
Affiliation(s)
- N A Sharif
- Alcon Research, Ltd., Fort Worth, TX 76134-2099, USA
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36
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Abstract
Two novel natural products, namely pinnatifida C, pinnatifida D, were isolated from the leaves of Crataegus pinnatifida Bge.var.major N.E.Br. Their structures were elucidated by the spectroscopic analysis and chemical evidence.
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Affiliation(s)
- P C Zhang
- Department of Phytochemistry, Shenyang Pharmaceutical University, China
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37
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Abstract
A new sesquiterpene lactone glucoside, Ixerin Z1 (1), was isolated from the whole plants of Ixeris sonchifolia (Bge.) Hance, along with 15 known compounds. The structure of 1 was elucidated as 1(10),3,11(13)-guaiatriene-12,6-olide-2-one-3-O-[6'-(p-hydroxyphenylacetyl)]-glucopyranoside by spectroscopic methods including 2D-NMR techniques.
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Affiliation(s)
- X Z Feng
- Department of Phytochemistry, Shenyang Pharmaceutical University, China
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38
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Qiu F, Ma ZZ, Xu SX, Yao XS, Che CT, Chen YJ. A pair of 24-hydroperoxyl epimeric dammarane saponins from flower-buds of Panax ginseng. J Asian Nat Prod Res 2001; 3:235-40. [PMID: 11491400 DOI: 10.1080/10286020108041396] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Further investigation on the saponins of the flower-buds of Panax ginseng C. A. Meyer has resulted in the isolation and structural elucidation of a pair of new 24-epimers of dammarane type saponins named ginsenoside I and II. The structures of the epimers were characterized on the basis of chemical and spectral evidence as 3-O-[beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl]-20-S-O-beta-D-glucopyranosyl-3beta, 12beta,20(S)-trihydroxy-24xi-hydroperoxydammar-25-ene, except for their C-24 configurations. Ginsenoside I is a new triterpene glycoside, and ginsenoside II is a known compound first isolated from a natural plant.
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Affiliation(s)
- F Qiu
- Department of Natural Medicinal Chemistry, Shenyang Pharmaceutical University, China.
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Abstract
Ginseng is a medicinal herb widely used in Asian countries, and many of its pharmacological actions are attributed to the ginsenosides. In a study of the anti-proliferative activity of ginsenosides using human prostate carcinoma LNCaP cell line, ginsenoside Rg3 displayed growth inhibitory activity. The cells lost its adherent property after incubation in the presence of 250 microM of ginsenoside for 48h. The expression of biomarker genes, including prostate specific antigen (PSA), androgen receptor (AR) and 5alpha-reductase (5alphaR), and that of the proliferating cell nuclear antigen (PCNA), were suppressed. Ginsenoside Rg3 induced classic apoptotic morphology and interfered with the expression of apoptosis-related genes, bcl-2 and caspase-3, in LNCaP cells, as demonstrated by fluorescence microscopy, flow cytometry and reverse transcriptase-polymerase chain reaction. Taken our results together, we suggested that ginsenoside Rg3 activated the expression of cyclin-kinase inhibitors, p21 and p27, arrested LNCaP cells at G1 phase, and subsequently inhibited cell growth through a caspase3-mediated apoptosis mechanism.
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Affiliation(s)
- W K Liu
- Department of Anatomy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories.
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40
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Zhou YJ, Che QM, Xu SX, Sun QS. Metabolites of baicalein in human urine. Pharmazie 2000; 55:626-7. [PMID: 10989847] [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: 02/17/2023]
Affiliation(s)
- Y J Zhou
- Department of Phytochemistry, Shenyang Pharmaceutical University, P.R. China
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41
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Abstract
Four new saponins, 3-O-[beta-D-glucopyranosyl(1-->3)-alpha-L-arabinopyranosyl]-16a lpha-hydroxyoleanolic acid 28-O-beta-D-glucopyranosyl ester (called aralia-saponin I), 3-O-[beta-D-glucopyranosyl(1-->3)-alpha-L-arabinopyranosyl]-16a lpha-hydroxyhederagenin 28-O-beta-D-glucopyranosyl ester (aralia-saponin II), 3-O-[beta-D-glucopyranosyl(1-->3)-beta-D-glucopyranosyl(1-->3)-alpha-L-+ ++arabinopyranosyl]-16alpha-hydroxyoleanolic acid 28-O-beta-D-glucopyranosyl ester (aralia-saponin III), 3-O-[beta-D-glucopyranosyl(1-->3)-beta-D-gucopyranosyl(1-->3)-beta -D-glucucopyranosyl]-16alpha-hydroxyoleanolic acid 28-O-beta-D-glucopyranosyl ester (aralia-saponin IV), were isolated from the root bark of Aralia elata (Miq.) Seem., together with nineteen known compounds including glycosides of (20S)-protopanaxadiol and (20S)-protopanaxatriol. Their structures were determined on the basis of chemical and spectroscopy methods.
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Affiliation(s)
- S J Song
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan
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Sharif NA, Crider JY, Xu SX, Williams GW. Affinities, selectivities, potencies, and intrinsic activities of natural and synthetic prostanoids using endogenous receptors: focus on DP class prostanoids. J Pharmacol Exp Ther 2000; 293:321-8. [PMID: 10772998] [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: 02/16/2023] Open
Abstract
The prostanoid receptor-subtype binding affinities, selectivities, potencies, and intrinsic activities of four natural prostanoids and six synthetic DP class prostanoids were determined using binding and functional assays with endogenous receptors. SQ27986 exhibited the highest affinity for the human platelet DP receptor and the best DP receptor selectivity profile. Prostaglandin (PG)D(2) was the least DP receptor-selective. The rank order of compound affinities at the DP receptor was SQ27986 (K(i) = 10 +/- 2 nM) > RS93520 = ZK110841 = BW245C (K(i) = 23-26 nM) > ZK118182 (K(i) = 50 +/- 9 nM) > PGD(2) (K(i) = 80 +/- 5 nM). DP receptor agonists produced cAMP in embryonic bovine tracheal fibroblasts with different potencies (EC(50) values in nM): ZK118182 (18 +/- 6), RS93520 (28 +/- 6), SQ27986 (29 +/- 7), ZK110841 (31 +/- 7), BW245C (53 +/- 16), and PGD(2) (98 +/- 10). BW245C was more efficacious and RS93520 was less efficacious than PGD(2). ZK110841 and ZK118182 exhibited a relatively high potency at the adenylyl cyclase-coupled EP(2) receptor in human nonpigmented ciliary epithelial cells but were partial agonists. None of the DP class agonists showed any EP(4) receptor functional activity in Chinese hamster ovary cells. The DP receptor antagonist BWA868C competitively antagonized the PGD(2)-induced cAMP accumulation in embryonic bovine tracheal fibroblast cells (pA(2) = 7.83 +/- 0.08). The dissociation constants for BWA868C antagonizing PGD(2)-, BW245C-, and ZK118182-induced cAMP production were quite similar (apparent -log K(b) = 7.9-8.2, n = 5-9). The pharmacological properties of some natural and numerous DP class synthetic prostanoids have been determined using endogenous receptors.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Research, Ltd., Fort Worth, Texas 76134-2099, USA.
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Meng ZY, Zhang JY, Xu SX, Sugahara K. Steroidal saponins from Anemarrhena asphodeloides and their effects on superoxide generation. Planta Med 1999; 65:661-663. [PMID: 10617410 DOI: 10.1055/s-2006-960842] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A new steroidal saponin, timosaponin F, along with six known compounds was isolated from the rhizomes of Anemarrhena asphodeloides Bge. On the basis of chemical and spectroscopic evidence, the structure of timosaponin F was elucidated as (5beta, 25 S):-spirostan-3beta,15alpha,23alpha-triol-3-O-beta- glucopyranosyl-(1--->2)-beta-galactopyranoside. The six known compounds were anemarrhenasaponin I, anemarrhenasaponin Ia, timosaponin BI, timosaponin BII, timosaponin B, timosaponin AIII; their effects on superoxide generation are also reported.
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Sharif NA, Xu SX. Pharmacological characterization of [3H]-Ifenprodil binding to polyamine binding sites on rabbit and rat retinal homogenates: role in neuroprotection? J Ocul Pharmacol Ther 1999; 15:271-81. [PMID: 10385136 DOI: 10.1089/jop.1999.15.271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Polyamine binding sites (PBS) represent one of the modulatory sites on the N-methyl-D-aspartate (NMDA) receptor-channel complex. We have characterized [3H]-ifenprodil binding to the PBS on washed homogenates of rabbit and rat retinas. Specific binding of [3H]-ifenprodil (2 nM) (in the presence of 3 microM 1,3-Di [2-tolyl] guanidine HCl and 10 microM GBR12909 to block sigma sites) comprised 47-56% of the total binding. Scatchard analyses indicated interaction with apparent high- and low-affinity sites: dissociation constants (K(d)s) = 0.5-0.6 microM and apparent density of sites (Bmax) = 1.5-4.3 pmol/mg protein and K(d)s = 2.0-2.9 microM, and Bmax values = 15.8-17.8 pmol/mg protein (n = 3). Ifenprodil (Ki = 0.4-0.8 microM), eliprodil (Ki = 0.7-0.8 microM), spermine (Ki = 72-79 microM), spermidine (Ki = 283-330 microM), putrescine (Ki > 650 microM) and MK-801 (Ki > 1 mM) (n = 3-5) differentially competed for [3H]-ifenprodil binding. The biphasic competition curves for ifenprodil were resolved into two binding components: rat retinas, IC50high = 0.19 +/- 0.13 microM and IC50low = 8.7 +/- 1.3 microM; rabbit retinas, IC50high = 0.1 +/- 0.01 microM and IC50low = 16.0 +/- 7.8 microM. These studies have shown the presence of specific PBS labeled by [3H]-ifenprodil in the rabbit and rat retinas which may, in part, be responsible for mediating the neuroprotective effects of eliprodil and ifenprodil.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Laboratories, Inc., Fort Worth, Texas 76134, USA
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Yanni JM, Weimer LK, Sharif NA, Xu SX, Gamache DA, Spellman JM. Inhibition of histamine-induced human conjunctival epithelial cell responses by ocular allergy drugs. Arch Ophthalmol 1999; 117:643-7. [PMID: 10326962 DOI: 10.1001/archopht.117.5.643] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To evaluate the effects of topical ocular drugs with histamine H1-antagonist activity on histamine-stimulated phosphatidylinositol turnover and interleukin (IL) 6 and IL-8 secretion from human conjunctival epithelial cells. METHODS Primary human conjunctival epithelial cell cultures were stimulated with histamine in the presence or absence of test drugs. Phosphatidylinositol turnover was quantified by ion exchange chromatography and cytokine content of supernatants by enzyme-linked immunosorbent assay. RESULTS Antazoline hydrochloride, emedastine difumarate, levocabastine hydrochloride, olopatadine hydrochloride, and pheniramine maleate attenuated histamine-stimulated phosphatidylinositol turnover and IL-6 and IL-8 secretion. Emedastine was the most potent in ligand binding, phosphatidylinositol turnover, and IL-6 secretion, with dissociation constant and 50% inhibitory concentrations of 1-3 nmol/L. Olopatadine, antazoline, and pheniramine exhibited similar H1-binding affinities (32-39 nmol/L). However, olopatadine was approximately 10-fold more potent as an inhibitor of cytokine secretion (50% inhibitory concentration, 1.7-5.5 nmol/L) than predicted from binding data, while antazoline and pheniramine were far less potent (20- to 140-fold) in functional assays. Levocabastine (dissociation constant, 52.6 nmol/L) exhibited greater functional activity (50% inhibitory concentration, 8-25 nmol/L) than either antazoline or pheniramine. CONCLUSIONS Histamine-stimulated phosphatidylinositol turnover and cytokine secretion by human conjunctival epithelial cells are attenuated by compounds with H1-antagonist activity. However, antihistaminic potency alone does not predict anti-inflammatory potential. Olopatadine, emedastine, and levocabastine were notably more potent than pheniramine and antazoline. CLINICAL RELEVANCE Selected topical ocular drugs with antihistaminic activity may offer therapeutic advantages to patients with allergic conjunctivitis by inhibiting proinflammatory cytokine secretion from human conjunctival epithelial cells.
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Affiliation(s)
- J M Yanni
- Ophthalmic Products Research, Alcon Laboratories Inc, Fort Worth, Tex 76134-2099, USA.
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Abstract
AIMS This study characterised the pharmacology of [3H]-ifenprodil binding to the polyamine binding sites (PBS) on the N-methyl-D-aspartate (NMDA) receptor channel complex on human retinas. These data were correlated with the known neuroprotective effects of ifenprodil and eliprodil. METHODS Specific binding of [3H]-ifenprodil (under sigma site blockade) was investigated using human retinal homogenates and radioligand binding techniques. Scatchard and competition analyses were utilised to define the pharmacology of the [3H]-ifenprodil binding sites. RESULTS Specific binding of [3H]-ifenprodil comprised 73% (SEM 3%) of total and reflected interaction with two affinity sites (Kds = 0.39 and 4.3 microM) of different densities (Bmax = 14.4 and 105 pmol/mg protein) (n = 5). The rank order of affinity of compounds competing for [3H]-ifenprodil binding to the high affinity PBS was: ifenprodil > eliprodil > arcaine > spermine > diaminodecane > spermidine > putrescine >> MK-801 (n = 3-7). However, [3H]-ifenprodil binding was minimally inhibited by glutamate, NMDA, and kainate. CONCLUSION These studies have shown, for the first time, the presence of specific [3H]-ifenprodil binding sites in the human retina with pharmacological characteristics of PBS associated with the NMDA receptor ionophore complex. The neuroprotective effects of eliprodil and ifenprodil may, in part, be mediated via these [3H]-ifenprodil labelled sites.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Laboratories, Inc., Fort Worth, Texas 76134, USA
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Sharif NA, Xu SX, Williams GW, Crider JY, Griffin BW, Davis TL. Pharmacology of [3H]prostaglandin E1/[3H]prostaglandin E2 and [3H]prostaglandin F2alpha binding to EP3 and FP prostaglandin receptor binding sites in bovine corpus luteum: characterization and correlation with functional data. J Pharmacol Exp Ther 1998; 286:1094-102. [PMID: 9694973] [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: 02/08/2023] Open
Abstract
Specific binding of [3H]prostaglandin (PG) E1, [3H]PGE2 and [3H]PGF2alpha to washed total particulate homogenates of bovine corpus luteum comprised 60 to 82% of total binding. Scatchard analysis of competition data revealed the presence of an apparent single population of binding sites for [3H]PGE1 and [3H]PGE2 with dissociation constants (Kds) of 2.76 to 3.39 nM and apparent receptor density (Bmax) of 1.5 to 1.56 pmol/g wet weight (n = 3-4). However, [3H]PGF2alpha appeared to interact with two classes/states of binding sites (Kd1 = 6.51 +/- 0.65 nM, Bmax1 = 2.33 +/- 0.26 pmol/g wet weight; Kd2 = 986 +/- 269 nM; Bmax2 = 44.8 +/- 11.3 pmol/g wet weight, n = 11). Specific [3H]PGE1 and [3H]PGE2 binding was most potently (nanomolar affinity) inhibited by PGs with high selectivity for the EP3 receptor subtype (e.g., GR63799, sulprostone, enprostil) but was weakly (Kis > 1 microM) influenced by EP1-selective (SC-19220), FP-selective (fluprostenol, PHXA85), DP-selective (BWA868C; ZK118182), IP-selective (iloprost) and TP-selective (U46619) PGs. Specific [3H]PGF2alpha binding was potently displaced by FP-selective agents such as fluprostenol, PHXA85 and cloprostenol with nanomolar affinities (n = 3-25), but weakly (Kis > 1 microM) by other PGs showing high selectivity for other PG receptor subtypes mentioned above. The relative specificities and potencies of EP3- and FP-selective PGs tested in the binding assays were confirmed using various functional assays. These studies have provided strong pharmacological evidence for the similarity of [3H]PGE1 and [3H]PGE2 binding to EP3 receptors and for [3H]PGF2alpha binding to FP receptors in washed bovine corpus luteum homogenates.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Laboratories Inc., Fort Worth, Texas 76134-2099, USA
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Crider JY, Griffin BW, Xu SX, Sharif NA. Use of a semi-automated, robotic radioimmunoassay to measure cAMP generated by activation of DP-, EP2-, and IP-prostaglandin receptors in human ocular and other cell types. Prostaglandins Leukot Essent Fatty Acids 1998; 59:77-82. [PMID: 9758211 DOI: 10.1016/s0952-3278(98)90055-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The aim of these studies was to compare the effects of several prostaglandin agonists on adenylyl cyclase activity in embryonic bovine tracheal (EBTr) cells, transformed human nonpigmented ciliary epithelial (NPE) cells and National Cancer Bank (NCB-20) cells. These cell types have been shown to express DP, EP2 and IP prostaglandin (PG) receptors, respectively. Cyclic AMP (cAMP) generation was measured by manual and semi-automated radioimmunoassay (RIA) techniques. ZK118182 (EC50 = 10-27 nM), PGE2 (EC50 = 21-27 nM) and PGI2 (EC50 = 3.5-4 nM) had the highest potency at the DP, EP2 and IP receptors, respectively. A plot of potency (EC50) values generated with both techniques showed a high degree of correlation for all three receptors. These studies provide further characterization of prostanoid receptor functional responses in three cell types and demonstrate the advantages of a semi-automated RIA method for the analysis of the second messenger cAMP.
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Affiliation(s)
- J Y Crider
- Alcon Laboratories (R2-43), Forth Worth, Texas 76134-2099, USA
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Sharif NA, Xu SX. Pharmacological characterization of bradykinin receptors coupled to phosphoinositide turnover in SV40-immortalized human trabecular meshwork cells. Exp Eye Res 1996; 63:631-7. [PMID: 9068370 DOI: 10.1006/exer.1996.0157] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This study sought to pharmacologically characterize bradykinin receptors on SV40-immortalized human trabecular meshwork (HTM3) cells. Phosphoinositide (PI) turnover studies were conducted using [3H]myo-inositol-labeled HTM3 cells and anion exchange chromatography to quantify [3H]inositol phosphates generated in response to bradykinin (BK) and various BK analogs. The blockade of these responses was studied using two potent and receptor-subtype selective antagonists. BK and T-kinin (Ile-Ser-BK:TK) induced a 4.2-4.4 fold stimulation of PI turnover above base levels at 1-10 microM. Several other peptides unrelated to BK, including angiotensin II, endothelin, cholecystokinin, bombesin and peptide YY tested at 1-10 microM were essentially inactive. The molar potencies (EC50) of BK, TK and close analogs were: BK = 4.5 +/- 0.5 nM (n = 6), Lys-BK = 6.5 +/- 0.7 nM (n = 3), TK = 38.8 +/- 6.6 nM (n = 8), Met-Lys-BK = 41.5 +/- 13.4 nM (n = 4), Des-Arg9-BK = 2093 +/- 626 nM (n = 4). All the latter BK-related peptides were full agonists. The actions of BK and TK were potently and competitively antagonized by Hoe-140 (molar potency = 0.6-1 nM; pA2 = 8.97-9.21. n = 3-4) and by D-Arg0[Hyp3,-Thi5.8,-DPhe7]-BK (molar potency = 251 nM; -log potency, pKb = 6.6), two selective B2-type BK antagonists. In conclusion, rank order of potency of BK agonists and the blockade of BK- and TK-induced PI turnover by the selective antagonists are consistent with the classification of the BK receptors on HTM3 cells as the B2-receptor subtype.
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Affiliation(s)
- N A Sharif
- Molecular Pharmacology Unit, Alcon Laboratories, Inc., Fort Worth, TX 76134, USA
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Sharif NA, Xu SX, Miller ST, Gamache DA, Yanni JM. Characterization of the ocular antiallergic and antihistaminic effects of olopatadine (AL-4943A), a novel drug for treating ocular allergic diseases. J Pharmacol Exp Ther 1996; 278:1252-61. [PMID: 8819509] [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: 02/02/2023] Open
Abstract
Olopatadine (AL-4943A; KW-4679) [(Z)-11-[3-(dimethylamino)propylidene]-6, 11-dihydrodibenz[b,e]oxepine-2-acetic acid hydrochloride] is an antiallergic/antihistaminic drug under development for topical ocular use. The effects of the compound on release of proinflammatory mediators (histamine, tryptase and prostaglandin D2) from monodispersed human conjunctival mast cells were assessed. Histamine receptor subtype binding affinities and functional potencies were determined with ligand binding and phosphoinositide turnover assays, respectively. Olopatadine inhibited the release of histamine, tryptase and prostaglandin D2, in a concentration-dependent manner (IC50 = 559 microM). Evaluation of the interaction of olopatadine with histamine receptors revealed a relatively high affinity for the H1 receptor (Ki = 31.6 nM, pKi = 7.5 +/- 0.1, n = 7) but lower affinities for H2 receptors (Ki = 100 microM, pKi = 4.0 +/- 0.19, n = 7) and H3 receptors (Ki = 79.4 microM, pKi = 4.1 +/- 0.16, n = 7). The H1 selectivity of olopatadine was superior to that of other ocularly used antihistamines studied, such as ketotifen, levocabastine, antazoline and pheniramine. The profiling of olopatadine in 42 nonhistamine receptor binding assays revealed that olopatadine interacts with only two nonhistamine receptor/uptake sites to any significant degree (pIC50 < or = 5-6). Olopatadine inhibited histamine-induced phosphoinositide turnover in human conjunctival epithelial cells (IC50 = 10 nM, pIC50 = 8.0, n = 4) and in other human ocular cells (IC50 = 15.8-31.6 nM, pIC50 = 7.5-7.8) and exhibited apparent noncompetitive antagonist properties in these cells, with an estimated dissociation constant (Kb) of 19.9 nM (pKb = 7.7, n = 6). This combination of mast cell mediator release inhibition and selective H1 receptor antagonism suggests that olopatadine may be particularly useful in the treatment of ocular allergic diseases. Indeed, olopatadine has recently shown clinical efficacy in an allergic conjunctivitis model in human subjects.
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Affiliation(s)
- N A Sharif
- Alcon Laboratories, Inc., Fort Worth, Texas, USA
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