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Zhang JH, Zhou SJ, Kuang Z, Qin ZH, Tan LW, Shao YT. [Expression profile of circular RNA in inflammatory response in human bronchial epithelial cells induced by carbon black nanoparticles]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:576-581. [PMID: 37667152 DOI: 10.3760/cma.j.cn121094-20220501-00251] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Objective: To explore the toxic effect of carbon black nanoparticles on human bronchial epithelial cells, and identify the differentially expressed circular RNA based on the full transcriptome high-throughput sequencing, so as to provide evidence for the development of biomarkers exposed to carbon black nanoparticles and their application on epigenetic toxicology. Methods: In June 2020, 16 HBE cells were treated with carbon black nanoparticles at concentrations of 20, 40 and 80 μg/ml, and 16 HBE cells without any intervention were used as the control group. The cytotoxicity of carbon black nanoparticles was detected by CCK8 and LDH experiments. Real-time quantitative fluorescent PCR (qRT-PCR) and ELISA were used to detect the changes of interleukin-6 (IL-6) and interleukin-8 (IL-6, IL-8) mRNA and protein levels of carbon black nanoparticles with concentration gradient after 72 h exposure. Western blot analysis was conducted to detect the expression levels of toll-like receptor 4 (TLR4), phosphorylated nuclear factor-κB (P-NF-κB), apoptosis-related speckled protein (ASC) and Caspase-1 associated with nuclear factor-κB. According to high-throughput sequencing results, differentially expressed Circrnas were screened and identified by qRT-PCR, and those with stable differentially expressed circrnas and the strongest association with the NF-κB pathway were selected for ring performance identification. Results: After being exposed to carbon black nanoparticles for 72 h, the activity of 16HBE cells decreased significantly (P<0.05), and the release of lactate dehydrogenase increased significantly (P<0.05). Compared with control group, mRNA expression levels of IL-6 and IL-8, protein levels of IL-6 and IL-8 were increased, and protein levels of TLR4, p-NF-κB, ASC and Caspase-1 were significantly up-regulated in 16 HBE cells of different concentrations, with statistical significance (P<0.05). Compared with the control group, a total of 492 differentially expressed circular Rnas (|log2 FC|>1) were detected. Among the 5 differentially expressed (P<0.05) circular Rnas, circ_002642 was selected as the object of subsequent research on circular Rnas, affter 72 hours of exposure to 80 μg/ml CBNPs, 16HBE cells showed signlficantly higher expression of circ_002642 (P<0.05) . Conclusion: Carbon black nanoparticles can induce differentially expressed circular RNAs associated with inflammatory response in human bronchial epithelial cells.
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Affiliation(s)
- J H Zhang
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - S J Zhou
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - Z Kuang
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - Z H Qin
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - L W Tan
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
| | - Y T Shao
- School of Public Health, Guangzhou Medical University, Guangzhou 511436, China
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Wang KC, Guo Q, Kuang Z, Jin J, Li D, Chen W, Zhu W, Li M. Structural elucidation of two novel degradants of lurasidone and their formation mechanisms under free radical-mediated oxidative and photolytic conditions via liquid chromatography-photodiode array/ultraviolet-tandem mass spectrometry and one-dimensional/two-dimensional nuclear magnetic resonance spectroscopy. J Mass Spectrom 2022; 57:e4871. [PMID: 35739062 DOI: 10.1002/jms.4871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/29/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
Lurasidone is an antipsychotic drug clinically used for the treatment of schizophrenia and bipolar disorder. During a mechanism-based forced degradation study of lurasidone, two novel degradation products were observed under free radical-mediated oxidative (via AIBN) and solution photolytic conditions. The structures of the two novel degradants were identified through an approach combining HPLC, LC-MSn (n = 1, 2), preparative HPLC purification and NMR spectroscopy. The degradant formed under the free radical-mediated condition is an oxidative degradant with half of the piperazine ring cleaved to form two formamides; a mechanism is proposed for the formation of the novel N,N'-diformyl degradant, which should be readily applicable to other drugs that contain a piperazine moiety that is widely present in drug molecules. The degradant observed under the solution photolytic condition is identified as the photo-induced isomer of lurasidone with the benzisothiazole ring altered into a benzothiazole ring.
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Affiliation(s)
- Kathy Cheng Wang
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Qiaohong Guo
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Zijian Kuang
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Jianyang Jin
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Dan Li
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Wenbin Chen
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Wenquan Zhu
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
- Quality Research Department of API, Zhejiang Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
| | - Min Li
- Center of Excellence for Modern Analytical Technologies (CEMAT), Huahai Pharmaceutical Co., Ltd., Linhai, Zhejiang, China
- Huahai US, Inc., Somerset, New Jersey, USA
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Tian Y, Lin J, Chen F, Wang S, Li D, Kuang Z, Zhu W, Li Y, Zheng T, Cao W, Zhu B, Tsai E, Fu L, Li M. Structure elucidation and formation mechanistic study of a methylene-bridged pregabalin dimeric degradant in pregabalin extended-release tablets. Int J Pharm 2020; 575:118910. [PMID: 31805310 DOI: 10.1016/j.ijpharm.2019.118910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/01/2019] [Accepted: 11/24/2019] [Indexed: 11/16/2022]
Abstract
During the pharmaceutical development of pregabalin extended-release tablets, an unknown degradant at a relative retention time (RRT) of 11.7 was observed and its nominal amount exceeded the ICH identification threshold in an accelerated stability study. The aim of this study is to identify the structure and investigate the formation mechanism of this impurity for the purpose of developing a chemically stable pharmaceutical product. By utilizing multi-stage LC-MS analysis in conjunction with mechanism-based stress study, the structure of the RRT 11.7 impurity was rapidly identified as a dimeric degradant that is caused by dimerization of two pregabalin molecules with a methylene bridging the two pregabalin moieties. The structure of the dimer was confirmed by 1D and 2D NMR measurement. The formation pathway of the dimeric degradant was also inferred from the mechanism-based stress study, which implicated that the bridging methylene could originate from formaldehyde which might be the culprit that triggers the dimerization in the first place. The subsequent API-excipients compatibility study indicated that the degradant was indeed formed in the compatibility experiments between pregabalin API and two polymeric excipients (PEO and PVPP) that are known to contain residual formaldehyde, but only in the co-presence of another excipient, colloidal silicon dioxide (SiO2). The kinetic behavior of the degradant formation was also investigated and two kinetic models were utilized based on the Arrhenius and Eyring equations, respectively, to calculate the activation energy (Ea) as well as the enthalpy of activation (△H‡), entropy of activation (△S‡), and Gibbs free energy (△G‡) of the degradation reaction. The results of this study would be useful for the understanding of similar dimeric degradant formation in finished products of drug substances containing primary or secondary amine moieties.
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Affiliation(s)
- Yun Tian
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China; Prinbury Biopharm Co., Ltd.,538 Cailun Road, Pudong, Shanghai 201203, PR China
| | - Jinsheng Lin
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China
| | - Feifei Chen
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China
| | - Shaolan Wang
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China; School of Science, China Pharmaceutical University, 639 Longmian Avenue, Jiangnin District, Nanjing, Jiangsu 210009, PR China
| | - Dan Li
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China
| | - Zijian Kuang
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China; School of Science, China Pharmaceutical University, 639 Longmian Avenue, Jiangnin District, Nanjing, Jiangsu 210009, PR China
| | - Wenquan Zhu
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China
| | - Yue Li
- Prinbury Biopharm Co., Ltd.,538 Cailun Road, Pudong, Shanghai 201203, PR China
| | - Terry Zheng
- Prinbury Biopharm Co., Ltd.,538 Cailun Road, Pudong, Shanghai 201203, PR China
| | - Wei Cao
- Prinbury Biopharm Co., Ltd.,538 Cailun Road, Pudong, Shanghai 201203, PR China
| | - Bob Zhu
- Prinbury Biopharm Co., Ltd.,538 Cailun Road, Pudong, Shanghai 201203, PR China
| | - Eric Tsai
- Prinbury Biopharm Co., Ltd.,538 Cailun Road, Pudong, Shanghai 201203, PR China
| | - Lei Fu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
| | - Min Li
- Center of Excellence for Modern Analytical Technologies (CEMAT), Zhejiang Huahai Pharmaceutical Co. Ltd., Xunqiao, Linhai, Zhejiang 317204, PR China; Huahai US, Inc., 700 Atrium Drive, Somerset, NJ 08873, USA.
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Xu X, Kuang Z, Han J, Meng Y, Li L, Luan H, Xu P, Wang J, Luo C, Ding H, Li Z, Bian J. Development and Characterization of a Fluorescent Probe for GLS1 and the Application for High-Throughput Screening of Allosteric Inhibitors. J Med Chem 2019; 62:9642-9657. [DOI: 10.1021/acs.jmedchem.9b01035] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xi Xu
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Zijian Kuang
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Jie Han
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Ying Meng
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Lei Li
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Hongyu Luan
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Pengfei Xu
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Jubo Wang
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Cheng Luo
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Hong Ding
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Zhiyu Li
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
| | - Jinlei Bian
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Tongjiaxiang 24, Nanjing 210009, P.R. China
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Geng S, Kuang Z, Peissig PL, Page D, Maursetter L, Hansen KE. Parathyroid hormone independently predicts fracture, vascular events, and death in patients with stage 3 and 4 chronic kidney disease. Osteoporos Int 2019; 30:2019-2025. [PMID: 31190122 DOI: 10.1007/s00198-019-05033-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/22/2019] [Indexed: 12/18/2022]
Abstract
UNLABELLED Doctors do not know whether treatment of high parathyroid hormone levels is linked to better outcomes in their patients with kidney disease. In this study, lower parathyroid hormone levels at baseline were linked to lower risk of fracture, vascular events, and death in people with kidney disease. PURPOSE Chronic kidney disease (CKD) affects ~ 20% of older adults, and secondary hyperparathyroidism (HPT) is a common condition in these patients. To what degree HPT predicts fractures, vascular events, and mortality in pre-dialysis CKD patients is debated. In stage 3 and 4 CKD patients, we assessed relationships between baseline serum PTH levels and subsequent 10-year probabilities of clinical fractures, vascular events, and death. METHODS We used Marshfield Clinic Health System electronic health records to analyze data from adult CKD patients receiving care between 1985 and 2013, and whose PTH was measured using a second-generation assay. Covariates included PTH, age, gender, tobacco use, vascular disease, diabetes, hypertension, hyperlipidemia, obesity, GFR, and use of osteoporosis medications. RESULTS Five thousand one hundred eight subjects had a mean age of 68 ± 17 years, 48% were men, and mean follow-up was 23 ± 10 years. Fractures, vascular events, and death occurred in 18%, 71%, and 56% of the cohort, respectively. In univariate and multivariate models, PTH was an independent predictor of fracture, vascular events, and death. The hazards of fracture, vascular events and death were minimized at a baseline PTH of 0, 69, and 58 pg/mL, respectively. CONCLUSIONS We found that among individuals with stage 3 and 4 CKD, PTH was an independent predictor of fractures, vascular events, and death. Additional epidemiologic studies are needed to confirm these findings. If a target PTH range can be confirmed, then randomized placebo-controlled trials will be needed to confirm that treating HPT reduces the risk of fracture, vascular events, and death.
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Affiliation(s)
- S Geng
- Department of Computer Science, Princeton University, Princeton, NJ, USA
| | - Z Kuang
- Computer Science Department, Stanford University, Stanford, CA, USA
| | - P L Peissig
- Center for Computational and Biomedical Informatics, Marshfield Clinic Research Institute, Marshfield, WI, USA
| | - D Page
- Department of Biostatistics and Medical Informatics, Department of Computer Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - L Maursetter
- Department of Medicine, University of Wisconsin School of Medicine & Public Health, Mailbox 4124, Medical Foundation Centennial Building, 1685 Highland Avenue, Madison, WI, 53705-2281, USA
| | - K E Hansen
- Department of Medicine, University of Wisconsin School of Medicine & Public Health, Mailbox 4124, Medical Foundation Centennial Building, 1685 Highland Avenue, Madison, WI, 53705-2281, USA.
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Gao H, Kuang Z, Zhong CX, Liang XE, Fan R, Wang KF, Lin WY, Hou JL, Sun J. [Prevalence and risk factors of nonalcoholic fatty liver disease in patients with chronic hepatitis B receiving antiviral therapy]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:347-351. [PMID: 31177658 DOI: 10.3760/cma.j.issn.1007-3418.2019.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the prevalence and risk factors of non-alcoholic fatty liver disease(NAFLD) in patients with chronic hepatitis B(CHB) receiving antiviral treatment. Methods: The cross-sectional study included 3 477 cases with CHB who received antiviral therapy. The prevalence of NAFLD was investigated, and then the risk factors were screened and analyzed by stepwise regression method in CHB patients with NAFLD as the dependent variable and the related influencing factors as independent variables. Results: The prevalence of NAFLD was 24.1% in CHB patients who received antiviral therapy. After adjusting for age and gender, central obesity (OR: 7.44, 95%CI: 6.06 ~ 9.14), hypertension (OR: 1.74, 95%CI: 1.51 ~ 2.20), and triglyceride (OR: 1.52, 95%CI: 1.18 ~ 1.96) were positively associated with NAFLD, and cirrhosis was negatively associated with NAFLD (OR: 0.42, 95%CI: 0.34 ~ 0.53). Patients with long-term antiviral therapy had increased risk of NAFLD. Conclusion: A significant proportion of CHB patients receiving antiviral therapy have suffered from NAFLD. Therefore, CHB patients receiving long-term antiviral treatment should pay more attention to the prevalence of NAFLD.
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Affiliation(s)
- H Gao
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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Harris-Tryon T, Gattu S, Propheter D, Kuang Z, Bel S, Ruhn K, Jo J, Zouboulis C, Kong H, Segre J, Hooper L. 945 Resistin-like molecule α provides vitamin A-dependent antimicrobial protection of the skin. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Affiliation(s)
- I. Pázsit
- Chalmers University of Technology, Department of Reactor Physics SE-412 96 Göteborg, Sweden
| | - M. Ceder
- Chalmers University of Technology, Department of Reactor Physics SE-412 96 Göteborg, Sweden
| | - Z. Kuang
- Chalmers University of Technology, Department of Reactor Physics SE-412 96 Göteborg, Sweden
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Notholt J, Kuang Z, Rinsland CP, Toon GC, Rex M, Jones N, Albrecht T, Deckelmann H, Krieg J, Weinzierl C, Bingemer H, Weller R, Schrems O. Enhanced upper tropical tropospheric COS: impact on the stratospheric aerosol layer. Science 2003; 300:307-10. [PMID: 12690193 DOI: 10.1126/science.1080320] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Carbonyl sulfide (COS) is considered to be a major source of the stratospheric sulfate aerosol during periods of volcanic quiescence. We measured COS at the tropical tropopause and find mixing ratios to be 20 to 50% larger than are assumed in models. The enhanced COS levels are correlated with high concentrations of biomass-burning pollutants like carbon monoxide (CO) and hydrogen cyanide (HCN). The analysis of backward trajectories and global maps of fire statistics suggest that biomass-burning emissions transported upward by deep convection are the source of the enhanced COS in the upper tropical troposphere.
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Affiliation(s)
- J Notholt
- University of Bremen, D-28334 Bremen, Germany.
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Zhang Q, Li S, Guo X, Guo L, Xiao X, Jia X, Kuang Z. Screening for CRX gene mutations in Chinese patients with Leber congenital amaurosis and mutational phenotype. Ophthalmic Genet 2001; 22:89-96. [PMID: 11449318 DOI: 10.1076/opge.22.2.89.2227] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE To screen for possible disease-causing mutations in the CRX gene in Chinese patients with Leber congenital amaurosis (LCA) and to enrich the understanding of its mutational phenotype. METHODS Genomic DNA was collected from 27 patients with LCA. The coding sequences of the CRX gene were analyzed using the PCR-heteroduplex-SSCP method. Mutations were confirmed by DNA sequencing. RESULTS We identified two heterozygous variations in the CRX gene in two patients with LCA. One was a deletion (GCC-->-CC, A181D1bp) leading to a frameshift and protein truncation. This mutation was present in a patient with LCA, but not in his healthy parents. The ocular manifestations of this A181Delta1bp mutation are described. An intronic variation (IVS1-13G-->C) was found in a patient with LCA as well as in his healthy father. CONCLUSION A heterozygous A181D1bp mutation in the CRX gene caused an LCA phenotype in a Chinese patient.
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Affiliation(s)
- Q Zhang
- Ocular Genetics and Molecular Biology, Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China.
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Shen H, Zhang Q, Kuang Z, Xiao X, Li R. [Cloning the differentially expressed genes in the retina of rds mouse during the development of retinitis pigmentosa]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2001; 18:114-7. [PMID: 11295129] [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: 02/19/2023]
Abstract
OBJECTIVE To clone the differentially expressed genes in the retina of rds mouse (the animal model of congenital retinitis pigmentosa) during the disease development. METHODS The retinal mRNA of rds mouse during the development of retinitis pigmentosa was analyzed by the mRNA differential display. The differentially expressed mRNA fragments were cloned and sequenced. RESULTS There was obvious difference of gene expression between rds mouse and the control during the development of retinitis pigmentosa. Five differentially expressed bands were cloned and sequenced. One of those had 86% identity (132/154) with the sequence of the human cDNA DKFZp434D1227 from adult testis in GenBank, which was submitted lately (15-Oct-1999) and without much information. The other had lower identity with the sequences in GenBank. A highly expressed clone in the rds mouse on postnatal day 25 had the same length as another clone in the normal on postnatal day 37, which was not expressed in the rds mouse on day 37. The sequences of the two clones were identical in all but two base pairs. CONCLUSION These results indicate that there are a lot of novel differentially expressed genes in the chronic processing diseases, such as retinitis pigmentosa.
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Affiliation(s)
- H Shen
- Zhongshan Ophthalmic Center, Sun Yat-Sen University of Medical Sciences, Guangzhou, Guangdong 510060 P. R. China.
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Zhang J, Kuang Z. [Changes in blood constitutive equation parameters during shock in rabbits]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 1998; 15:356-9. [PMID: 12552779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Based on the method which can more precisely obtain the constitutive parameters, we studied the changes of hemorphelogical characteristics of rabbits during shock and the effect of MN9200, a king of calcium channel anatogist injected into the veins of the rabbits. The results showed that shock induced a significant change in hemorheological index and NM9202 improved the condition.
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Affiliation(s)
- J Zhang
- Dept. of Physics, Fourth Military Medical University, Xi'an 710032
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Liao D, Han H, Kuang Z. [Finite element analysis of human tibia in vitro]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 1998; 15:53-7. [PMID: 12549355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
This investigation was aimed at the fatigue fracture of tibia that often occurs in soldiers, as well as in dancers and athletes. The data of ground reaction force(GRF) of soldiers were measured using a force platform in three common gaits: marching, parading and running. The stress distribution in tibia under these GRFs were analyzed with a FE model. The results showed that the smallest GRF(744.8N) is in quick marching, the next (1156.4N) in parading and the largest (1391.6N) in running. The stress distribution under GRF was mot uniform in the tibia. The maximum stresses occurred at a site 1/3 tibia length below the knee where tibia fracture is often seen clinically. The maximum stresses were 110 MPa and 115 MPa in parading and running respectively. This means that the tibial tractures in soldiers are mostly associated with stress, i.e. the greater the stress is, the higher the incidence of stress fracture comes about.
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Affiliation(s)
- D Liao
- Department of Engneering Mechanics, Xi'an Jiaotong University, Xi'an 710049
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Kuang Z, Zhuang Y. A study on the stage of contraction in Chinese family life cycle. Chin J Popul Sci 1992; 4:127-37. [PMID: 12317918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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