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Cebral JR, Duan X, Chung BJ, Putman C, Aziz K, Robertson AM. Wall Mechanical Properties and Hemodynamics of Unruptured Intracranial Aneurysms. AJNR Am J Neuroradiol 2015; 36:1695-703. [PMID: 26228891 PMCID: PMC4890156 DOI: 10.3174/ajnr.a4358] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 01/30/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Aneurysm progression and rupture is thought to be governed by progressive degradation and weakening of the wall in response to abnormal hemodynamics. Our goal was to investigate the relationship between the intra-aneurysmal hemodynamic conditions and wall mechanical properties in human aneurysms. MATERIALS AND METHODS A total of 8 unruptured aneurysms were analyzed. Computational fluid dynamics models were constructed from preoperative 3D rotational angiography images. The aneurysms were clipped, and the domes were resected and mechanically tested to failure with a uniaxial testing system under multiphoton microscopy. Linear regression analysis was performed to explore possible correlations between hemodynamic quantities and the failure characteristics and stiffness of the wall. RESULTS The ultimate strain was correlated negatively to aneurysm inflow rate (P = .021), mean velocity (P = .025), and mean wall shear stress (P = .039). It was also correlated negatively to inflow concentration, oscillatory shear index, and measures of the complexity and instability of the flow; however, these trends did not reach statistical significance. The wall stiffness at high strains was correlated positively to inflow rate (P = .014), mean velocity (P = .008), inflow concentration (P = .04), flow instability (P = .006), flow complexity (P = .019), wall shear stress (P = .002), and oscillatory shear index (P = .004). CONCLUSIONS In a study of 8 unruptured intracranial aneurysms, ultimate strain was correlated negatively with aneurysm inflow rate, mean velocity, and mean wall shear stress. Wall stiffness was correlated positively with aneurysm inflow rate, mean velocity, wall shear stress, flow complexity and stability, and oscillatory shear index. These trends and the impact of hemodynamics on wall structure and mechanical properties should be investigated further in larger studies.
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Affiliation(s)
- J R Cebral
- From the Department of Bioengineering (J.R.C., B.J.C.), Volgenau School of Engineering, George Mason University, Fairfax, Virginia
| | - X Duan
- Department of Mechanical Engineering and Material Science (X.D., A.R.), Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - B J Chung
- From the Department of Bioengineering (J.R.C., B.J.C.), Volgenau School of Engineering, George Mason University, Fairfax, Virginia
| | - C Putman
- Interventional Neuroradiology (C.P.), Inova Fairfax Hospital, Falls Church, Virginia
| | - K Aziz
- Neurosurgery (K.A.), Allegheny General Hospital, Pittsburgh, Pennsylvania
| | - A M Robertson
- Department of Mechanical Engineering and Material Science (X.D., A.R.), Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania
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Li Y, Duan X, Qiao X, Li X, Wang K, Men Q, Chen M. Mitochondrial DNA revealed the extent of genetic diversity and invasion origin of populations from two separate invaded areas of a newly invasive pest, Cydia pomonella (L.) (Lepidoptera: Tortricidae) in China. Bull Entomol Res 2015; 105:485-496. [PMID: 25895900 DOI: 10.1017/s0007485315000334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cydia pomonella is a serious invasive insect pest in China, and has caused severe damage to the production of apple and pear in its invaded areas. This species is distributing in the northwest and northeast of China, but no occurrence of it has been recorded in the large areas (about 3000-5000 km away) between the invaded northwestern and northeastern regions despite continuous monitoring. As yet the genetic diversity and invasion origin of the C. pomonella populations in Northwestern and Northeastern China is obscure. In this study, we investigate the genetic diversity of 14 populations of C. pomonella sampled throughout the main distribution regions in Northwestern (Xinjiang and Gansu Provinces) and Northeastern (Heilongjiang Province) China and compared them with nine populations from Europe and other continents using the mitochondrial COI, COII and Cytb genes. Both the populations from Northeastern and Northwestern China shared some haplotypes with populations from other countries. Haplotypes of the three mitochondrial genes had a different distribution in Northeastern and Northwestern China. The northeastern populations had more private haplotypes than the northwestern populations. A large number of the individuals from northwestern populations shared a few haplotypes of each of the three genes. The haplotype numbers and haplotype diversities of the northeastern populations were similar to those of field populations in other countries, but were higher than those of the northwestern populations. Populations from the Northwestern China showed similar haplotype number and haplotype diversity. We conclude that the population genetic background of C. pomonella populations in Northeastern and Northwestern China varies due to different invasion sources and that this should be considered before the application of new pest control tactics.
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Affiliation(s)
- Y Li
- Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture,Northwest A&F University,Yangling 712100,Shaanxi,China
| | - X Duan
- Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture,Northwest A&F University,Yangling 712100,Shaanxi,China
| | - X Qiao
- College of Veterinary Medicine,Northwest A&F University,Yangling 712100,Shaanxi,China
| | - X Li
- Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture,Northwest A&F University,Yangling 712100,Shaanxi,China
| | - K Wang
- Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture,Northwest A&F University,Yangling 712100,Shaanxi,China
| | - Q Men
- Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture,Northwest A&F University,Yangling 712100,Shaanxi,China
| | - M Chen
- Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture,Northwest A&F University,Yangling 712100,Shaanxi,China
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Abstract
BACKGROUND AND OBJECTIVE Although surveys in the USA have shown that male subjects are more prone to develop periodontitis, sex as a risk factor in periodontitis, and its mechanism, remain controversial. Animal models are ideal for investigating immunological mechanisms of sex dimorphism in periodontitis because in these models it is possible to exclude the interference of gender-related risk factors, such as smoking and oral hygiene habits. Based on surveys in humans and reports on sex dimorphism in other diseases, our hypothesis is that sex is a risk factor in periodontitis. MATERIAL AND METHODS Different murine models (oral gavage model and ligature model) for periodontitis have been utilized to determine susceptibility to periodontitis in female and male mice. Periodontal bone levels were measured as the distance from the cemento-enamel junction to the alveolar bone crest (CEJ-ABC) in young female or male mice (8-10 wk of age). Differential expression of inflammatory mediators in the gingivae of female and male mice was determined by quantitative real-time PCR. RESULTS In comparison with male mice, female mice displayed significantly (p < 0.05) increased periodontal bone loss, accompanied by elevated expression of proinflammatory cytokines (interleukin-1β, interleukin-6 and interleukin-17A) and higher numbers of oral bacteria. CONCLUSION In contrast to the results in humans, in which periodontitis susceptibility is also influenced by confounding gender-related behaviors, in the murine oral gavage model and ligature model, female mice appear to be more susceptible to periodontal bone loss than male mice. In the ligature model, we observed significantly (p < 0.05) higher CEJ-ABC distance, gingival proinflammatory cytokine production and number of oral bacteria in female mice. Furthermore, our results imply that female mice develop periodontitis with a higher progression rate. Our study has therefore established that animal models can be used to dissect the mechanisms underlying genuine gender-based differences in periodontal disease susceptibility and/or progression.
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Affiliation(s)
- X Duan
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - R C Gleason
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - F Li
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - K B Hosur
- Department of Microbiology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - X Duan
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - D Huang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - H Wang
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - G Hajishengallis
- Department of Microbiology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - S Liang
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
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Putman C, Cebral J, Duan X, Chung B, Aziz K, Robertson A. E-022 wall mechanical properties and hemodynamics of unruptured intracranial aneurysms. J Neurointerv Surg 2015. [DOI: 10.1136/neurintsurg-2015-011917.97] [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: 11/04/2022]
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105
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Liu X, Duan X, Xu J, Jin Q, Chen F, Wang P, Yang Y, Tang X. Impact of intra-operative intraperitoneal chemotherapy on organ/space surgical site infection in patients with gastric cancer. J Hosp Infect 2015. [PMID: 26215613 DOI: 10.1016/j.jhin.2015.05.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Various risk factors for surgical site infection (SSI) have been identified such as age, overweight, duration of surgery, blood loss, etc. Intraperitoneal chemotherapy during surgery is a common procedure in patients with gastric cancer, yet its impact on SSI has not been evaluated. AIM To evaluate whether intra-operative intraperitoneal chemotherapy is a key risk factor for organ/space SSI in patients with gastric cancer. METHODS All patients with gastric cancer who underwent surgery at the Department of Gastrointestinal Surgery between January 2008 and December 2013 were studied. The organ/space SSI rates were compared between patients who received intra-operative intraperitoneal chemotherapy and patients who did not receive intra-operative intraperitoneal chemotherapy, and the risk factors for organ/space SSI were analysed by univariate and multi-variate regression analyses. The microbial causes of organ/space SSI were also identified. FINDINGS Of the eligible 845 patients, 356 received intra-operative intraperitoneal chemotherapy, and the organ/space SSI rate was higher in these patients compared with patients who did not receive intra-operative intraperitoneal chemotherapy (9.01% vs 3.88%; P = 0.002). Univariate analysis confirmed the significance of this finding (odds ratio 2.443; P = 0.003). As a result, hospital stay was increased in patients who received intra-operative intraperitoneal chemotherapy {mean 20.91 days [95% confidence interval (CI) 19.76-22.06] vs 29.72 days (95% CI 25.46-33.99); P = 0.000}. The results also suggested that intra-operative intraperitoneal chemotherapy may be associated with more Gram-negative bacterial infections. CONCLUSION Intra-operative intraperitoneal chemotherapy is a significant risk factor for organ/space SSI in patients with gastric cancer.
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Affiliation(s)
- X Liu
- Department of Hospital Infection Management, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - X Duan
- Department of Head and Neck Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - J Xu
- Department of Head and Neck Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China.
| | - Q Jin
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - F Chen
- Department of Hospital Network Information Centre, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - P Wang
- Department of Hospital Infection Management, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Y Yang
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - X Tang
- Department of Public Health, Guangxi Medical University, Nanning, China
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Michael-Kordatou I, Michael C, Duan X, He X, Dionysiou DD, Mills MA, Fatta-Kassinos D. Dissolved effluent organic matter: Characteristics and potential implications in wastewater treatment and reuse applications. Water Res 2015; 77:213-248. [PMID: 25917290 DOI: 10.1016/j.watres.2015.03.011] [Citation(s) in RCA: 234] [Impact Index Per Article: 26.0] [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: 08/27/2014] [Revised: 02/19/2015] [Accepted: 03/16/2015] [Indexed: 06/04/2023]
Abstract
Wastewater reuse is currently considered globally as the most critical element of sustainable water management. The dissolved effluent organic matter (dEfOM) present in biologically treated urban wastewater, consists of a heterogeneous mixture of refractory organic compounds with diverse structures and varying origin, including dissolved natural organic matter, soluble microbial products, endocrine disrupting compounds, pharmaceuticals and personal care products residues, disinfection by-products, metabolites/transformation products and others, which can reach the aquatic environment through discharge and reuse applications. dEfOM constitutes the major fraction of the effluent organic matter (EfOM) and due to its chemical complexity, it is necessary to utilize a battery of complementary techniques to adequately describe its structural and functional character. dEfOM has been shown to exhibit contrasting effects towards various aquatic organisms. It decreases metal uptake, thus potentially reducing their bioavailability to exposed organisms. On the other hand, dEfOM can be adsorbed on cell membranes inducing toxic effects. This review paper evaluates the performance of various advanced treatment processes (i.e., membrane filtration and separation processes, activated carbon adsorption, ion-exchange resin process, and advanced chemical oxidation processes) in removing dEfOM from wastewater effluents. In general, the literature findings reveal that dEfOM removal by advanced treatment processes depends on the type and the amount of organic compounds present in the aqueous matrix, as well as the operational parameters and the removal mechanisms taking place during the application of each treatment technology.
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Affiliation(s)
- I Michael-Kordatou
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - C Michael
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - X Duan
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0071, USA
| | - X He
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0071, USA
| | - D D Dionysiou
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0071, USA
| | - M A Mills
- US EPA, Office of Research and Development, 26 W, Martin Luther King Drive, Cincinnati, OH 45268, USA
| | - D Fatta-Kassinos
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus.
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Huang X, Zhao Z, Cao L, Chen Y, Zhu E, Lin Z, Li M, Yan A, Zettl A, Wang YM, Duan X, Mueller T, Huang Y. High-performance transition metal-doped Pt3Ni octahedra for oxygen reduction reaction. Science 2015; 348:1230-4. [DOI: 10.1126/science.aaa8765] [Citation(s) in RCA: 1345] [Impact Index Per Article: 149.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 05/04/2015] [Indexed: 11/02/2022]
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108
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Duan X, Arbique G, Guild J, Dhanantwari A, Yagil Y, Anderson J. TU-EF-204-12: Quantitative Evaluation of Spectral Detector CT Using Virtual Monochromatic Images: Initial Results. Med Phys 2015. [DOI: 10.1118/1.4925698] [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: 11/07/2022] Open
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109
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Arbique G, Guild J, Duan X, Malguria N, Omar H, Zhang D, Brewington C, Anderson J. SU-E-I-34: Evaluating Use of AEC to Lower Dose for Lung Cancer Screening CT Protocols. Med Phys 2015. [DOI: 10.1118/1.4924031] [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: 11/07/2022] Open
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110
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Zhang X, Bai S, Li H, Hu H, Duan X, Chen M, Wang D, Chen Y, Zhang F, Shen J. CT and MRI findings of radiation-induced external auditory canal carcinoma in patients with nasopharyngeal carcinoma after radiotherapy. Br J Radiol 2015; 88:20140791. [PMID: 25827205 DOI: 10.1259/bjr.20140791] [Citation(s) in RCA: 6] [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: 11/05/2022] Open
Abstract
OBJECTIVE To summarize the radiological and clinical features of radiation-induced external auditory canal carcinomas (RIEACCs) in patients with nasopharyngeal carcinomas (NPCs) after radiation therapy. METHODS CT, MRI and clinical features in 16 patients with histologically proven RIEACCs were retrospectively reviewed. There were 2 females and 14 males, with a median age of 52.5 years at the time of diagnosis of RIEACC. Imaging parameters including lesion extent, size, margin, shape, bone destruction, adjacent structure invasion, density/signal intensity, and pattern and degree of enhancement were assessed. Clinical features including clinical staging, histological type, treatment and radiation dose (RD) of primary NPC as well as the histological type, staging of radiation-induced tumour and the latent period between NPC and RIT were recorded. RESULTS All patients had a single RIEACC. The lesions had a size of 3.5 ± 1.4 cm and were localized (n = 7) or extensive (n = 9). Most of the lesions were partially or ill defined with an irregular shape and had an intermediate density/signal pattern and moderate homogeneous enhancement. The latent period of RIEACCs ranged from 10 to 20 years in nine patients with a RD of 68-70 Gy; from 2 to 10 years in five patients with a RD of 68-74 Gy; and more than 20 years in two patients with a RD of 70 or 72 Gy. CONCLUSION An external auditory canal (EAC) mass with homogeneous, intermediate CT density or signal intensity in patients with NPC after radiotherapy is highly suggestive of RIEACC, which should be included in the routine surveillance for patients with NPC after radiotherapy. ADVANCES IN KNOWLEDGE RIEACCs could occur as short as 2 years after radiotherapy in patients with NPC and have distinct features from otitis media and sarcomas. This EAC malignancy should be included in routine surveillance for patients with NPC after radiotherapy.
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Affiliation(s)
- X Zhang
- 1 Department of Radiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
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111
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Yu Z, Leng S, Jorgensen SM, Li Z, Gutjahr R, Chen B, Duan X, Halaweish AF, Yu L, Ritman EL, McCollough CH. Initial results from a prototype whole-body photon-counting computed tomography system. Proc SPIE Int Soc Opt Eng 2015; 9412. [PMID: 26097280 DOI: 10.1117/12.2082739] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
X-ray computed tomography (CT) with energy-discriminating capabilities presents exciting opportunities for increased dose efficiency and improved material decomposition analyses. However, due to constraints imposed by the inability of photon-counting detectors (PCD) to respond accurately at high photon flux, to date there has been no clinical application of PCD-CT. Recently, our lab installed a research prototype system consisting of two x-ray sources and two corresponding detectors, one using an energy-integrating detector (EID) and the other using a PCD. In this work, we report the first third-party evaluation of this prototype CT system using both phantoms and a cadaver head. The phantom studies demonstrated several promising characteristics of the PCD sub-system, including improved longitudinal spatial resolution and reduced beam hardening artifacts, relative to the EID sub-system. More importantly, we found that the PCD sub-system offers excellent pulse pileup control in cases of x-ray flux up to 550 mA at 140 kV, which corresponds to approximately 2.5×1011 photons per cm2 per second. In an anthropomorphic phantom and a cadaver head, the PCD sub-system provided image quality comparable to the EID sub-system for the same dose level. Our results demonstrate the potential of the prototype system to produce clinically-acceptable images in vivo.
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Affiliation(s)
- Z Yu
- Department of Radiology, Mayo Clinic, Rochester, MN, USA 55905
| | - S Leng
- Department of Radiology, Mayo Clinic, Rochester, MN, USA 55905
| | - S M Jorgensen
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA 55905
| | - Z Li
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA 55905
| | - R Gutjahr
- Siemens Medical Solutions, Malvern, PA, USA 19355
| | - B Chen
- Department of Radiology, Mayo Clinic, Rochester, MN, USA 55905
| | - X Duan
- Department of Radiology, Mayo Clinic, Rochester, MN, USA 55905
| | | | - L Yu
- Department of Radiology, Mayo Clinic, Rochester, MN, USA 55905
| | - E L Ritman
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA 55905
| | - C H McCollough
- Department of Radiology, Mayo Clinic, Rochester, MN, USA 55905
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112
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Shen S, Zhou Y, Xu Y, Zhang B, Duan X, Huang R, Li B, Shi Y, Shao Z, Liao H, Jiang J, Shen N, Zhang J, Yu C, Jiang H, Li S, Han S, Ma J, Sun Q. A multi-centre randomised trial comparing ultrasound vs mammography for screening breast cancer in high-risk Chinese women. Br J Cancer 2015; 112:998-1004. [PMID: 25668012 PMCID: PMC4366890 DOI: 10.1038/bjc.2015.33] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 01/09/2015] [Accepted: 01/12/2015] [Indexed: 11/24/2022] Open
Abstract
Background: Chinese women tend to have small and dense breasts and ultrasound is a common method for breast cancer screening in China. However, its efficacy and cost comparing with mammography has not been evaluated in randomised trials. Methods: At 14 breast centres across China during 2008–2010, 13 339 high-risk women aged 30–65 years were randomised to be screened by mammography alone, ultrasound alone, or by both methods at enrolment and 1-year follow-up. Results: A total of 12 519 and 8692 women underwent the initial and second screenings, respectively. Among the 30 cancers (of which 15 were stage 0/I) detected, 5 (0.72/1000) were in the mammography group, 11 (1.51/1000) in the ultrasound group, and 14 (2.02/1000) in the combined group (P=0.12). In the combined group, ultrasound detected all the 14 cancers, whereas mammography detected 8, making ultrasound more sensitive (100 vs 57.1%, P=0.04) with a better diagnostic accuracy (0.999 vs 0.766, P=0.01). There was no difference between mammography and ultrasound in specificity (100 vs 99.9%, P=0.51) and positive predictive value (72.7 vs 70.0% P=0.87). To detect one cancer, the costs of ultrasound, mammography, and combined modality were $7876, $45 253, and $21 599, respectively. Conclusions: Ultrasound is superior to mammography for breast cancer screening in high-risk Chinese women.
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Affiliation(s)
- S Shen
- Department of Breast Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing 100730, China
| | - Y Zhou
- Department of Breast Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing 100730, China
| | - Y Xu
- Department of Breast Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing 100730, China
| | - B Zhang
- Department of Breast Surgery, Cancer Institute & Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 17 Panjiayuan Nanli, Chaoyang District, Beijing 100021, China
| | - X Duan
- Department of Breast Surgery, First Hospital affiliated to Peking University, 7 Xishenku, Xicheng District, Beijing 100034, China
| | - R Huang
- Department of Breast Surgery, Maternity & Child Care Center of Qinhuangdao, 452 Hongqi Road, Qinhuangdao, Hebei 066000, China
| | - B Li
- Department of Breast Surgery, Beijing Hospital affiliated to Ministry of Health, 1 Dahua Road, Dongcheng District, Beijing 100005, China
| | - Y Shi
- Department of Breast Surgery, ShanXi Traditional Medicine Hospital, 46 Bingzhouxi Street, Taiyuan, Shanxi 030012, China
| | - Z Shao
- Department of Breast Surgery, Cancer Hospital affiliated to Fudan University, 270 Dong'an Road, Xuhui District, Shanghai 200032, China
| | - H Liao
- Department of Breast Surgery, Yingbin Hospital of Yancheng, Yingbinnan Road, Yancheng, Jiangsu 224005, China
| | - J Jiang
- Department of Breast Surgery, Southwest Hospital affiliated to the Third Military Medical University, 30 Tanyanzheng Street, Chongqing, 400038, China
| | - N Shen
- Department of Women Health, Population and Family Planning Service Center of Zhuhai, 2 Jilian Road, Zhuhai, Guangdong 519000, China
| | - J Zhang
- Department of Breast Surgery, Cancer Hospital affiliated to Tianjin Medical University, Huanhuxi Road, Hexi District, Tianjin 300060, China
| | - C Yu
- Department of Breast Surgery, Chinese 307 Hospital affiliated to the People's Liberation Army, 8 Dongda Street, Fengtai District, Beijing 100071, China
| | - H Jiang
- Department of Breast Surgery, Beijing Chaoyang Hospital affiliated to the Capital Medical University, 8 Gongtinan Road, Chaoyang District, Beijing 100043, China
| | - S Li
- Department of Breast Surgery, General Hospital affiliated to Beijing Military Area Command, 5 Nanmencang, Dongcheng District, Beijing 100700, China
| | - S Han
- Department of Epidemiology and Medical Statistics, Institute of Basic Medical Science, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing 100730, China
| | - J Ma
- Channing Division of Network Medicine, Brigham & Women's Hospital, Harvard Medical School; Department of Epidemiology, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA, 02115, USA
| | - Q Sun
- Department of Breast Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Shuaifuyuan, Dongcheng District, Beijing 100730, China
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Xue Y, Wang L, Xia D, Li Q, Gao S, Dong M, Cai T, Shi S, He L, Hu K, Mao T, Duan X. Dental Abnormalities Caused by Novel Compound Heterozygous CTSK Mutations. J Dent Res 2015; 94:674-81. [PMID: 25731711 DOI: 10.1177/0022034515573964] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cathepsin K (CTSK) is an important protease responsible for degrading type I collagen, osteopontin, and other bone matrix proteins. The mutations in the CTSK gene can cause pycnodysostosis (OMIM 265800), a rare autosomal recessive bone dysplasia. Patients with pycnodysostosis have been reported to present specific dental abnormalities; however, whether these dental abnormalities are related to dysfunctional CTSK has never been reported. Here we investigated the histologic changes of cementum and alveolar bone in a pycnodysostosis patient, caused by novel compound heterozygous mutations in the CTSK gene (c.87 G>A p.W29X and c.848 A>G p.Y283C). The most impressive manifestations in tooth were extensive periradicular high-density clumps with unclear periodontal space by orthopantomography examination and micro-computed tomography scanning analysis. Hematoxylin/eosin and toluidine blue staining and atomic force microscopy analysis showed that the cementum became significantly thickened, softened, and full of cementocytes. The disorganized bone structure was the main character of alveolar bone. The p.W29X mutation may represent the loss-of-function allele with an earlier termination codon in the precursor CTSK polypeptide. Residue Y283 is highly conserved among papain-like cysteine proteases. Three-dimensional structure modeling analysis found that the loss of the hydroxybenzene residue in the Y283C mutation would interrupt the hydrogen network and possibly affect the self-cleavage of the CTSK enzyme. Furthermore, p.Y283C mutation did not affect the mRNA and protein levels of overexpressed CTSK in COS-7 system but did reduce CTSK enzyme activity. In conclusion, the histologic and ultrastructural changes of cementum and alveolar bone might be affected by CTSK mutation via reduction of its enzyme activity (clinical trial registration: ChiCTR-TNC-10000876).
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Affiliation(s)
- Y Xue
- State Key Laboratory of Military Stomatology, Department of Oral Biology, Clinic of Oral Rare and Genetic Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, P. R. China
| | - L Wang
- Department of Molecular Biology, Fourth Military Medical University, Xi'an, Shaanxi, P. R. China
| | - D Xia
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark
| | - Q Li
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark
| | - S Gao
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark
| | - M Dong
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Aarhus C, Denmark
| | - T Cai
- Oral Infection and Immunity Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - S Shi
- Center for Craniofacial Molecular Biology, University of Southern California School of Dentistry, Los Angeles, CA, USA
| | - L He
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, P. R. China
| | - K Hu
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, P. R. China
| | - T Mao
- State Key Laboratory of Military Stomatology, Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, P. R. China
| | - X Duan
- State Key Laboratory of Military Stomatology, Department of Oral Biology, Clinic of Oral Rare and Genetic Diseases, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, P. R. China
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Song Y, Duan X, Chen J, Huang W, Zhu Z, Hu W. The distribution of kisspeptin (Kiss)1- and Kiss2-positive neurones and their connections with gonadotrophin-releasing hormone-3 neurones in the zebrafish brain. J Neuroendocrinol 2015; 27:198-211. [PMID: 25529211 DOI: 10.1111/jne.12251] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 03/05/2014] [Revised: 11/30/2014] [Accepted: 12/16/2014] [Indexed: 12/01/2022]
Abstract
Kisspeptin is a neuroendocrine hormone with a critical role in the activation of gonadotrophin-releasing hormone (GnRH) neurones, which is vital for the onset of puberty in mammals. However, the functions of kisspeptin neurones in non-mammalian vertebrates are not well understood. We have used transgenics to labell kisspeptin neurones (Kiss1 and Kiss2) with mCherry in zebrafish (Danio rerio). In kiss1:mCherry transgenic zebrafish, Kiss1 cells were located in the dorsomedial and ventromedial habenula, with their nerve fibres contributing to the fasciculus retroflexus and projecting to the ventral parts of the interpeduncular and raphe nuclei. In kiss2:mCherry zebrafish, Kiss2 cells were primarily located in the dorsal zone of the periventricular hypothalamus and, to a lesser extent, in the periventricular nucleus of the posterior tuberculum and the preoptic area. Kiss2 fibres formed a wide network projecting into the telencephalon, the mesencephalon, the hypothalamus and the pituitary. To study the relationship of kisspeptin neurones and GnRH3 neurones, these fish were crossed with gnrh3:EGFP zebrafish to obtain kiss1:mCherry/gnrh3:EGFP and kiss2:mCherry/gnrh3:EGFP double transgenic zebrafish. The GnRH3 fibres ascending to the habenula were closely associated with Kiss1 fibres projecting from the ventral habenula. On the other hand, GnRH3 fibres and Kiss2 fibres were adjacent but scarcely in contact with each other in the telencephalon and the hypothalamus. The Kiss2 and GnRH3 fibres in the ventral hypothalamus projected into the pituitary via the pituitary stalk. In the pituitary, Kiss2 fibres were directly in contact with GnRH3 fibres in the pars distalis. These results reveal the pattern of kisspeptin neurones and their connections with GnRH3 neurones in the brain, suggesting distinct mechanisms for Kiss1 and Kiss2 in regulating reproductive events in zebrafish.
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Affiliation(s)
- Y Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Sciences, Beijing, China
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Deng ML, Jiang N, Duan X, Giddings RP, Yi XW, Cao BY, Mansoor S, Qiu K, Tang JM. Robust and tunable 16.375Gb/s dual-band optical OFDM transmissions over directly modulated VCSEL-based 200m OM2 MMFs. Opt Express 2015; 23:373-383. [PMID: 25835683 DOI: 10.1364/oe.23.000373] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Utilizing low-cost, 2.2GHz modulation bandwidth, uncooled and standalone directly modulated VCSEL (DM-VCSEL)-based real-time dual-band optical OFDM (OOFDM) transmitters, aggregated 16.375Gb/s transmissions of OOFDM signals having bandwidths approximately 3.8 times higher than the VCSEL manufacturer-specified modulation bandwidths, are experimentally demonstrated, for the first time, over 200m OM2 MMF links based on intensity modulation and direct detection. The aggregated signal transmission capacities of the aforementioned links vary by just 8% for various OM2 MMFs ranging from 100m to 500m, and by just 10% over a 1GHz passband carrier frequency detuning range. Such dual-band OOFDM adaptability-induced excellent performance robustness and large passband frequency tunability can significantly relax the requirements on VCSEL modulation bandwidth for achieving specific transmission performances for cost-sensitive application scenarios such as data centers.
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116
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Ning M, Duan X. Development and in vitro/in vivo evaluation of a silastic intravaginal ring for mifepristone delivery. Indian J Pharm Sci 2015; 77:335-42. [PMID: 26180280 PMCID: PMC4502149 DOI: 10.4103/0250-474x.159671] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 01/19/2015] [Accepted: 06/04/2015] [Indexed: 11/04/2022] Open
Abstract
Preparation and in vitro/in vivo evaluation of mifepristone intravaginal ring formulations were investigated. In the present study, it is reported that a mifepristone intravaginal ring of reservoir design comprising of a mifepristone silicone elastomer core enclosed in a silicone layer. During the preparation of intravaginal ring solid dispersion method was employed which improved the release rate of drug from the intravaginal ring. In vitro release studies performed under sink conditions and the released drug amounts were estimated using UV spectrometry at 310 nm. In addition, the in vivo release profile of in-house devices was evaluated in female New Zealand white rabbits. The rabbit plasma samples were processed and analyzed using a validated HPLC-MS method. Norgestrel was used as internal standard, and plasma samples contained mifepristone and internal standard were deproteinized, and then subjected to HPLC-MS analysis under condition of electrospray ionization in the selected ion monitoring mode. The drug release from intravaginal ring made in house was constant for 21 days in rabbits, which suggested the mifepristone intravaginal ring release system would be useful in clinical practice in the future. The result indicated the in vitro/in vivo correlation is perfect, which explained in vitro release analysis method developed was feasible.
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Xu Z, Duan X, Yu X, Wang H, Dong X, Xiang Z. The accuracy of ultrasonography and magnetic resonance imaging for the diagnosis of Morton's neuroma: a systematic review. Clin Radiol 2014; 70:351-8. [PMID: 25466436 DOI: 10.1016/j.crad.2014.10.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 10/17/2014] [Accepted: 10/27/2014] [Indexed: 02/05/2023]
Abstract
AIM To determine the accuracy of MRI versus ultrasound for Morton's neuroma. MATERIALS AND METHODS A search was undertaken for clinical studies published in any language in PubMed up to the date of December 2013. Studies assessing the accuracy of the ultrasound or MRI for the diagnosis of Morton's neuroma were included. Data were pooled for meta-analysis. Study selection, data collection, and extraction were performed independently by two authors. Meta-disc 1.4 and Revman 5.2 software were applied for statistical analysis. RESULTS The study included 12 studies; 217 patients underwent MRI and 241 underwent ultrasound examinations. There appeared greater diagnostic accuracy for ultrasound than MRI for the diagnosis of Morton's neuroma (ultrasound sensitivity 90%, specificity 88%, positive likelihood ratio 2.77, negative likelihood ratio 0.16 versus MRI sensitivity 93%, specificity 68%, positive likelihood ratio 1.89, negative likelihood ratio 0.19). CONCLUSIONS The available evidence suggests that ultrasound can provide better accuracy for the diagnosis of Morton's neuroma than MRI.
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Affiliation(s)
- Z Xu
- Department of Orthopedics, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu 610041, Sichuan, China
| | - X Duan
- Department of Orthopedics, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu 610041, Sichuan, China
| | - X Yu
- Department of Orthopedics, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu 610041, Sichuan, China
| | - H Wang
- Department of Orthopedics, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu 610041, Sichuan, China
| | - X Dong
- Department of Pathology, Chengdu Women's and Children's Central Hospital, No. 1617 Riyue Avenue, Chengdu 610000, Sichuan, China
| | - Z Xiang
- Department of Orthopedics, West China Hospital, Sichuan University, No.37 Guoxue Alley, Wuhou District, Chengdu 610041, Sichuan, China.
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Duan X, Wang B, Zhao X, Shen G, Xia Z, Huang N, Jiang Q, Lu B, Xu D, Fang J, Tao S. Personal inhalation exposure to polycyclic aromatic hydrocarbons in urban and rural residents in a typical northern city in China. Indoor Air 2014; 24:464-473. [PMID: 24467466 DOI: 10.1111/ina.12099] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Accepted: 01/18/2014] [Indexed: 06/03/2023]
Abstract
Personal inhalation exposure samples were collected and analyzed for polycyclic aromatic hydrocarbons (PAHs) for 126 selected volunteers during heating and non-heating seasons in a typical northern Chinese city, Taiyuan. Measured personal PAH exposure levels for the urban residents in the heating and non-heating seasons were 690 (540-1051) and 404 (266-544) ng/m(3) , respectively, while, for the rural residents, they were 770 (504-1071) and 312 (201-412) ng/m(3) , respectively. Thus, rural residents are exposed to lower PAH contamination in comparison with the urban residents in the non-heating seasons. In the heating season, personal PAH inhalation exposure levels were comparable between the urban and rural residents, in part owing to the large rate of residential solid fuel consumption in the rural area for household cooking and heating. The estimated incremental lifetime cancer risks (ILCR) due to PAH exposure in Taiyuan were 3.36 × 10(-5) and 2.39 × 10(-5) for the rural and urban residents, respectively, significantly higher than the literature-reported national average level, suggesting an urgent need of PAH pollution control to protect human health.
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Affiliation(s)
- X Duan
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China
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119
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Duan X, Giddings RP, Bolea M, Ling Y, Cao B, Mansoor S, Tang JM. Real-time experimental demonstrations of software reconfigurable optical OFDM transceivers utilizing DSP-based digital orthogonal filters for SDN PONs. Opt Express 2014; 22:19674-19685. [PMID: 25321051 DOI: 10.1364/oe.22.019674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Real-time optical OFDM (OOFDM) transceivers with on-line software-controllable channel reconfigurability and transmission performance adaptability are experimentally demonstrated, for the first time, utilizing Hilbert-pair-based 32-tap digital orthogonal filters implemented in FPGAs. By making use of an 8-bit DAC/ADC operating at 2GS/s, an oversampling factor of 2 and an EML intensity modulator, the demonstrated RF conversion-free transceiver supports end-to-end real-time simultaneous adaptive transmissions, within a 1GHz signal spectrum region, of a 2.03Gb/s in-phase OOFDM channel and a 1.41Gb/s quadrature-phase OOFDM channel over a 25km SSMF IMDD system. In addition, detailed experimental explorations are also undertaken of key physical mechanisms limiting the maximum achievable transmission performance, impacts of transceiver's channel multiplexing/demultiplexing operations on the system BER performance, and the feasibility of utilizing adaptive modulation to combat impairments associated with low-complexity digital filter designs. Furthermore, experimental results indicate that the transceiver incorporating a fixed digital orthogonal filter DSP architecture can be made transparent to various signal modulation formats up to 64-QAM.
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120
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Duan X, Liu D, Xing X, Li J, Zhao S, Nie H, Zhang Y, Sun G, Li B. Tert-butylhydroquinone as a phenolic activator of Nrf2 antagonizes arsenic-induced oxidative cytotoxicity but promotes arsenic methylation and detoxication in human hepatocyte cell line. Biol Trace Elem Res 2014; 160:294-302. [PMID: 24970285 DOI: 10.1007/s12011-014-0042-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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] [Received: 04/15/2014] [Accepted: 06/09/2014] [Indexed: 01/23/2023]
Abstract
Oxidative stress plays crucial roles in exerting a variety of damages upon arsenic exposure. Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) is a master transcriptional regulator protecting cells and tissues from oxidative injuries. The objective of this study was to test whether tert-butylhydroquinone (tBHQ), a well-known synthetic Nrf2 inducer, could protect human hepatocytes against arsenic-induced cytotoxicity and oxidative injuries. Our results showed that 5 and 25 μmol/l tBHQ pretreatment suppressed the arsenic-induced hepatocellular cytotoxicity, reactive oxygen species generation, and hepatic lipid peroxidation, while relieved the arsenic-induced disturbances of intracellular glutathione balance. In addition, we also observed that tBHQ treatment promoted the arsenic biomethylation process and upregulated Nrf2-regulated downstream heme oxygenase-1 and NADPH: quinine oxidoreductase 1 mRNA expressions. Collectively, we suspected that Nrf2 signaling pathway may be involved in the protective effects of tBHQ against arsenic invasion in hepatocytes. These data suggest that phenolic Nrf2 inducers, such as tBHQ, represent novel therapeutic or dietary candidates for the population at high risk of arsenic poisoning.
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Affiliation(s)
- Xiaoxu Duan
- Department of Occupational and Environmental Health, Key Laboratory of Arsenic-Related Biological Effects and Prevention and Treatment in Liaoning Province, School of Public Health, China Medical University, 92 North 2nd Road, Heping District, Shenyang, 110001, China
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Duan X, Grimes J, Yu L, Leng S, McCollough C. TH-C-18A-10: The Influence of Tube Current On X-Ray Focal Spot Size for 70 KV CT Imaging. Med Phys 2014. [DOI: 10.1118/1.4889634] [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: 11/07/2022] Open
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122
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Mullins J, Bues M, Duan X, Kruse J, Herman M. SU-E-J-19: Accuracy of Dual-Energy CT-Derived Relative Electron Density for Proton Therapy Dose Calculation. Med Phys 2014. [DOI: 10.1118/1.4888070] [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: 11/07/2022] Open
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123
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Li S, Duan X, Li Y, Liu B, McGilvray I, Chen L. MicroRNA-130a inhibits HCV replication by restoring the innate immune response. J Viral Hepat 2014; 21:121-8. [PMID: 24383925 DOI: 10.1111/jvh.12131] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 05/01/2013] [Indexed: 12/15/2022]
Abstract
Hepatitis C virus (HCV) infection is a major cause of chronic hepatitis and hepatocellular carcinoma. Currently pegylated interferon (IFN) combined with ribavirin remains the best therapeutic approach, although patients infected with HCV genotype I may benefit from adding protease inhibitors as 'triple therapy'. MicroRNAs (miRNAs) are endogenous small noncoding RNAs that regulate gene expression and have recently been shown to play an important role in human innate immune response and as an antiviral in chimpanzees. We studied the effect of miR-130a on the HCV replication. We found that miR-130a significantly inhibits HCV replication in both HCV replicon and J6-/JFH1-infected cells. Over expression of miR-130a upregulated the expression of type I IFN (IFN-α/IFN -β), ISG15, USP18 and MxA, which are involved in innate immune response and decreased expression of miR-122, a well-defined miRNA promoting HCV production. In conclusion, miR-130a inhibits HCV replication/production by restoring host innate immune responses and/or downregulating pro-HCV miR-122. miR-130a might be a potential drug target by modulating host innate immune responses to combat HCV infection.
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Affiliation(s)
- S Li
- The Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
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Cao Y, Gong W, Zhang H, Liu B, Li B, Wu X, Duan X, Dong J. A comparison of serum and sputum inflammatory mediator profiles in patients with asthma and COPD. J Int Med Res 2013; 40:2231-42. [PMID: 23321180 DOI: 10.1177/030006051204000621] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE To investigate serum and sputum cytokine profiles in asthma and chronic obstructive pulmonary disorder (COPD). METHODS Clinical characteristics, blood and sputum samples were collected from asthma (n = 37) and COPD (n = 36) patients, and healthy subjects (n = 39). Cytokines were measured by enzyme-linked immunosorbent assay (ELISA) and inflammation antibody array; levels were analysed according to smoking status and presence of eosinophilia in the airways of COPD/asthma patients, and compared with those in healthy subjects. RESULTS ELISA revealed a significant difference in the expression of only a few cytokines in the COPD versus asthma groups, and in both patient groups compared with healthy subjects. The antibody array showed greater differentiation in inflammatory mediators. In the subphenotype analysis, the differential expression of cytokines was more significant between eosinophilic and noneosinophilic airway inflammation than between asthma and COPD, according to both the ELISA and antibody array. There was little difference in cytokine expression between smoking and nonsmoking subgroups. CONCLUSIONS Differential expression of inflammatory mediators is present between patients with COPD or asthma, and eosinophilic or noneosinophilic airway inflammation, and contributes to understanding the cytokine network of airway inflammation.
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Affiliation(s)
- Y Cao
- Department of Integrated Traditional Chinese and Western Medicine, Huashan Hospital, Fudan University, Shanghai, China
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Abstract
The biological functions of ion channels in tooth development vary according to the nature of their gating, the species of ions passing through those gates, the number of gates, localization of channels, tissue expressing the channel, and interactions between cells and microenvironment. Ion channels feature unique and specific ion flux in ameloblasts, odontoblasts, and other tooth-specific cell lineages. Both enamel and dentin have active chemical systems orchestrating a variety of ion exchanges and demineralization and remineralization processes in a stage-dependent manner. An important role for ion channels is to regulate and maintain the calcium and pH homeostasis that are critical for proper enamel and dentin biomineralization. Specific functions of chloride channels, TRPVs, calcium channels, potassium channels, and solute carrier superfamily members in tooth formation have been gradually clarified in recent years. Mutations in these ion channels or transporters often result in disastrous changes in tooth development. The channelopathies of tooth include altered eruption (CLCN7, KCNJ2, TRPV3), root dysplasia (CLCN7, KCNJ2), amelogenesis imperfecta (KCNJ1, CFTR, AE2, CACNA1C, GJA1), dentin dysplasia (CLCN5), small teeth (CACNA1C, GJA1), tooth agenesis (CLCN7), and other impairments. The mechanisms leading to tooth channelopathies are primarily related to pH regulation, calcium homeostasis, or other alterations of the niche for tooth eruption and development.
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Affiliation(s)
- X Duan
- Department of Oral Biology, Clinic of Oral Rare Diseases and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, P.R. China
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Abstract
Cigarette smoking is one of the most important risk factors for kidney cancer, but the molecular mechanism is poorly understood. To examine the expression change of histone H3 on lysine 27 trimethylase (H3K27me3) demethylases ubiquitously transcribed TPR gene on the X chromosome (UTX) in kidney cancer cell line 786-O after nicotine treatment, quantitative real-time-polymerase chain reaction and western blotting analysis were carried out. These results showed that nicotine can increase UTX messenger RNA and protein levels and also decrease the content of H3K27me3. The decreased content of H3K27me3 may activate specific gene expression and lead to kidney cancer. Future investigation on nicotine induced UTX expression and its epigenetic effect would deepen our understanding on nicotine toxicity and carcinogenicity.
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Affiliation(s)
- X Guo
- Shenzhen Key Laboratory of Genitourinary Tumor, Shenzhen Second People’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, People’s Republic of China
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, Hebei, People’s Republic of China
- Department of Biochemistry, Bethune Military Medical College, Shijiazhuang, Hebei, People’s Republic of China
| | - X Li
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, Hebei, People’s Republic of China
| | - Y Wang
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, Hebei, People’s Republic of China
| | - Z Tian
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, Hebei, People’s Republic of China
| | - X Duan
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, Hebei, People’s Republic of China
| | - Z Cai
- Shenzhen Key Laboratory of Genitourinary Tumor, Shenzhen Second People’s Hospital, Zhongshan School of Medicine, Sun Yat-sen University, First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, People’s Republic of China
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Leng S, Shiung M, Duan X, Yu L, Zhang Y, McCollough C. MO-D-134-05: Size Specific Dose Estimation in Abdominal CT: Impact of Longitudinal Variations in Patient Size. Med Phys 2013. [DOI: 10.1118/1.4815263] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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129
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Duan X, Zhang Y, Leng S, Yu L, McCollough C. WE-C-103-07: Standardization of CT Scanner Performance in Routine Clinical Exams: A Pilot Survey. Med Phys 2013. [DOI: 10.1118/1.4815556] [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: 11/07/2022] Open
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130
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Teng X, Bian Y, Cai Y, Duan X, Yuan F, Du J, Wu W, Wang X, Tang C, Qi Y. Downregulation of endogenous intermedin augmented myocardial injury in rats with ischemia/reperfusion. Horm Metab Res 2013; 45:206-12. [PMID: 23018870 DOI: 10.1055/s-0032-1327572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Intermedin (IMD) plays an important regulatory role in cardiovascular function. We aimed to explore the protein expression of IMD and its receptors, calcitonin receptor-like receptor (CRLR) and receptor activity-modifying proteins (RAMPs), and the role of endogenous IMD in myocardial ischemia/reperfusion (I/R) injury in rats. The rat model of I/R was created by ligating cardiac left anterior descending artery. Western blot was used to determine protein expression of CRLR and RAMPs, and radioimmunoassay was used to detect IMD content. Compared with control, protein levels of CRLR and RAMPs in both ischemic and nonischemic region were upregulated at different stages of reperfusion. IMD protein content in nonischemic area myocardium also increased. However, IMD protein content in ischemic area downregulated at 3-, 6-, and 12-h reperfusion. In hypoxia/reoxygenation model of neonatal cardiomyocytes, IMD attenuated myocyte injury, and IMD receptor antagonist IMD17-47 aggravated myocyte impairment by blocking endogenous IMD. In conclusion, the downregulation of IMD at early stage of reperfusion might augment myocardium injury.
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Affiliation(s)
- X Teng
- The Key Laboratory of Remodeling-related Cardiovascular Diseases, Capital Medical University, Ministry of Education, Beijing, China
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Lakhani A, Guo R, Duan X, Ersahin C, Gaynor ER, Godellas C, Kay C, Lo SS, Mai H, Perez C, Albain K, Robinson P. Abstract PD10-02: Metabolic syndrome and recurrence within the 21-gene recurrence score assay risk categories in lymph node negative breast cancer. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-pd10-02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The incidence of the metabolic syndrome (MS) has been increasing in the United States and elsewhere. The interaction of MS with breast cancer (BC) incidence, tumor biology and outcomes are under study. We hypothesized that the presence of MS would predict BC recurrence to a variable degree across the diverse BC biology as defined by the risk categories of the 21-gene recurrence score (RS) assay.
Patients and Methods: We studied consecutive patients (pts) with newly diagnosed, estrogen receptor (ER) positive, lymph node (LN) negative BC treated in our institution between 2006–2011 who had a 21-gene RS assay done on their tumors. All pts were treated with standard systemic and local therapy. The electronic medical record was queried for key diagnoses including MS and its constituent parts. The WHO definition was used to categorize pts as having MS defined as diabetes mellitus (DM) or glucose intolerance, plus at least 2 of the following: hypertension (HTN), dyslipidemia (HL), central obesity and microalbuminemia. Tumor characteristics including Ki67 index, grade, tumor size, HER2/neu status; and pt characteristics including age, race, menopausal status, body mass index were recorded. The association of MS and the tumor and patient characteristics with the RS tertiles of low, intermediate and high risk was analyzed.
Results: We identified 332 pts, median age 62 years, of whom 88 (27%) had MS. There was no significant association between the MS and any of the patient or tumor variables including the 21-gene RS assay, except for race (p = 0.004). Eleven of 21 (52%) African-American women had MS, 68 of 284 (24%) Caucasian women had MS, and 9 of 21 (43%) others including Hispanic and Asian women had MS. However, there was a significant association between recurrence and MS (p = 0.0002) independent of other factors. Of the 21 pts who recurred, 13 (61.9%) had MS. There was an association of recurrence and MS within RS tertiles. For pts with low risk scores, 7/44 (15.9%) with MS vs. 1/126 (0.79%) without MS had recurrence (p = 0.0003). For pts with intermediate risk scores, 5/30 (16.67%) with MS vs. 4/83 (4.82%) without MS had recurrence (p = 0.05). For patients with high risk scores, 1/9 (11.11%) with MS vs. 2/15 (13.33%) without MS had recurrence (p = 1).
Conclusion: MS is an independent risk factor for BC recurrence among women with LN negative, ER positive BC treated with standard adjuvant therapy. There is a striking impact of MS on recurrence in pts with tumor biologies defined by low (and to a lesser degree) intermediate risk 21-gene RS assay scores. However, there is no difference in recurrence risk by MS among those pts with high RS. This implies that interventions directed at modifying MS in newly diagnosed pts with early BC may potentially favorably impact survival in those with specific tumor biologies as defined by multigene assays. Thus, long-term prospective studies should be conducted to further evaluate both the short and long term effects of MS on BC outcomes.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr PD10-02.
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Affiliation(s)
- A Lakhani
- Loyola University Medical Center, Maywood, IL
| | - R Guo
- Loyola University Medical Center, Maywood, IL
| | - X Duan
- Loyola University Medical Center, Maywood, IL
| | - C Ersahin
- Loyola University Medical Center, Maywood, IL
| | - ER Gaynor
- Loyola University Medical Center, Maywood, IL
| | - C Godellas
- Loyola University Medical Center, Maywood, IL
| | - C Kay
- Loyola University Medical Center, Maywood, IL
| | - SS Lo
- Loyola University Medical Center, Maywood, IL
| | - H Mai
- Loyola University Medical Center, Maywood, IL
| | - C Perez
- Loyola University Medical Center, Maywood, IL
| | - K Albain
- Loyola University Medical Center, Maywood, IL
| | - P Robinson
- Loyola University Medical Center, Maywood, IL
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Zhang Z, Kang Y, Zhang Z, Zhang H, Duan X, Liu J, Li X, Liao W. Expression of microRNAs during chondrogenesis of human adipose-derived stem cells. Osteoarthritis Cartilage 2012; 20:1638-46. [PMID: 22947280 DOI: 10.1016/j.joca.2012.08.024] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/20/2012] [Accepted: 08/23/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVES MicroRNAs (miRNAs) play an important role in the regulation of chondrogenesis of mesenchymal stem cells, but their expression still remains unknown in human adipose-derived stem cells (hADSCs). In this study the miRNA expression profile during chondrogenic differentiation of hADSC and the potential mechanism whereby miRNAs may affect the process of chondrogenesis are considered. METHODS hADSCs were isolated and cultured. The expression of chondrogenic proteins was detected using enzyme-linked immunosorbent assay (ELISA). miRNA expression profiles before and after chondrogenic induction were obtained using miRNA microarray essay and differently expressed miRNAs were primarily verified using quantitative real-time polymerase chain reaction (qRT-PCR). Putative targets of the miRNAs were predicted using online software programs MiRanda, TargetScan and miRBase. RESULTS Twelve miRNAs were found to be differentially expressed pre- and post-chondrogenic induction by over a two-fold change, including eight up-regulated miRNAs (miR-193b, miR-199a-3p/hsa-miR-199b-3p, miR-455-3p, miR-210, miR-381, miR-92a, miR-320c, and miR-136), and four down-regulated miRNAs (miR-490-5p, miR-4287, miR-BART8*, and miR-US25-1*). qRT-PCR analysis further confirmed these results. Predicted target genes of the differentially expressed miRNAs were based on the overlap of at least two online prediction algorithms, with the known functions of regulating chondrogenic differentiation, self-renewal, signal transduction and cell cycle control. CONCLUSIONS In this study we have identified a group of miRNAs and their target genes, which may play important roles in regulating chondrogenic differentiation of hADSCs. Our results provide the basis for further investigation into the molecular mechanism of chondrogenesis in hADSCs and their differentiation for cartilage engineering.
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Affiliation(s)
- Z Zhang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
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Duan X, Sheardown H. Incorporation of cell-adhesion peptides into collagen scaffolds promotes corneal epithelial stratification. Journal of Biomaterials Science, Polymer Edition 2012; 18:701-11. [PMID: 17623552 DOI: 10.1163/156856207781034151] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The objective of this study was to examine the effects of cell-adhesion peptides incorporated into collagen scaffolds on corneal epithelial cell stratification. Peptides (YIGSR, YIGSRIKVAV, IKVAVYIGSR and negative control YISGR) were first chemically attached to dendrimers. The peptide-modified dendrimers were then used as collagen cross-linkers. This permitted the incorporation of the peptides into the bulk structure of the collagen gels. The amount of peptide incorporated into the collagen gels was determined by 125I radiolabelling to be between 0.064 and 6.4 microg/mg collagen for YIGSR, and between 0.1187 to 11.87 microg/mg collagen for YIGSRIKVAV and IKVAVYIGSR. Corneal epithelial cell monolayers were grown on the surface of the collagen scaffolds and then exposed to conditions that promoted stratification as a stratified epithelial layer is desired in a tissue-engineered cornea. It was found that all of the incorporated peptides promoted stratification of the cells with the exception of the negative control YISGR. A synergistic effect of the combined sequences from laminin was observed, with the orientation of the peptide sequences having a great impact on the ability of the materials to promote cell stratification.
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Affiliation(s)
- X Duan
- Department of Chemical Engineering, McMaster University, 1280 Main St. W., Hamilton, ON, Canada L8S 4L7
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Duan X, Ling F, Shen Y, Yang J, Xu HY. Venous spasm during contrast-guided axillary vein puncture for pacemaker or defibrillator lead implantation. Europace 2012; 14:1008-11. [DOI: 10.1093/europace/eus066] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Abstract
BACKGROUND Hypoxia-inducible factor 1α has been shown to play a central role in RCC tumorigenesis by acting as a transcription factor. Histone demethylase JMJD1A is an iron- and 2-oxoglutarate-dependent dioxygenase which catalyze the demethylation of mono- and dimethylated H3K9. JMJD1A can be upregulated by hypoxia via HIF-1 and associated with cancer. The expression of JMJD1A was determined in 10 kidney cancer tissue and adjacent tissue by quantitative polymerase chain reaction, western blotting and immunohistochemistry. Furthermore, the expression of JMJD1A was investigated in cell line 786-0 through adding nickle or cobalt ion to mimic hypoxic environment. The expression of JMJD1A was higher in cancer tissue than adjacent tissue, and in hypoxic environment than normal environment. In cancer tissue, the JMJD1A mainly located around blood vessels which indicated that JMJD1A is involved tumor angiogenesis. CONCLUSION the increased expression of JMJD1A might be associated with the progression of kidney cancer. KEYWORDS renal cell carcinoma, histone demethylase, JMJD1A, hypoxia-inducible factor, iron.
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Affiliation(s)
- X Guo
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, Hebei, People's Republic of China
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136
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Wang J, Duan X, Christner J, Leng S, Yu L, McCollough C. TH-A-214-10: Comparison of Bismuth Shielding and Globally Reducing Tube Current in Head and Thoracic CT. Med Phys 2011. [DOI: 10.1118/1.3613475] [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: 11/07/2022] Open
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137
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Chen L, Wang J, Duan X, Yu L, Leng S, McCollough C. SU-E-I-110: Do Reconstruction Parameters Affect CT-Based Kidney Stone Volume Quantification? Med Phys 2011. [DOI: 10.1118/1.3611685] [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: 11/07/2022] Open
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138
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Duan X, Wang J, Christner J, Leng S, Grant K, McCollough C. SU-E-I-62: Dose Reduction to Anterior Surface with Organ-Based Tube Current Modulation: Evaluation of Performance in a Phantom Study. Med Phys 2011. [DOI: 10.1118/1.3611635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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139
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Lin X, Zhang Z, Duan X, Feng X. Control Of Aneuploidy By Novel Histone H3 Phosphatase H3P. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.758] [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: 10/18/2022]
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140
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Gang T, Yildirim O, Kinge S, Duan X, Reinhoudt DN, Blank DHA, Rijnders G, van der Wiel WG, Huskens J. Nano-patterned monolayer and multilayer structures of FePtAu nanoparticles on aluminum oxide prepared by nanoimprint lithography and nanomolding in capillaries. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11559f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene cause cystic fibrosis (CF). Both CF and dental fluorosis result in protein retention in mature enamel. We hypothesized that excess fluoride might cause protein retention by interfering with CFTR function, resulting in abnormal expression of proteases and pathological endocytosis. Millimolar concentrations of fluoride reduced uptake of Emdogain, an enamel matrix derivative, in ameloblast-like PABSo-E cells, while stimulating an acidic intracellular environment at the same time. When CFTR function was inhibited by either an siRNA or a chloride channel inhibitor, CFTRinh-172, fluoride's effect on Emdogain uptake was partially blocked. Treatment of cells with CFTR siRNA down-regulated expression of proteases MMP20 and KLK4 and increased intracellular pH. We conclude that excess fluoride inhibits endocytic activity of ameloblasts through the CFTR chloride channel or other chloride channels. The intracellular pH might be the key mechanism by which abnormal proteolytic activity and defective endocytosis cause the residual protein observed in enamel of patients with CF and dental fluorosis.
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Affiliation(s)
- X Duan
- Department of Oral Biology, The Fourth Military Medical University, 145 West Changle Road, Xi’an, Shaanxi 710032, PR China.
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142
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Matthews Q, Brolo AG, Lum J, Duan X, Jirasek A. Raman spectroscopy of single human tumour cells exposed to ionizing radiationin vitro. Phys Med Biol 2010; 56:19-38. [DOI: 10.1088/0031-9155/56/1/002] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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143
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Zhang LH, Li F, Evans DG, Duan X. Cu−Zn−(Mn)−(Fe)−Al Layered Double Hydroxides and Their Mixed Metal Oxides: Physicochemical and Catalytic Properties in Wet Hydrogen Peroxide Oxidation of Phenol. Ind Eng Chem Res 2010. [DOI: 10.1021/ie9019193] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L. H. Zhang
- Department of Catalysis Science and Technology and Tianjin Key Laboratory of Applied Catalysis Science & Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, P.R. China, and State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - F. Li
- Department of Catalysis Science and Technology and Tianjin Key Laboratory of Applied Catalysis Science & Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, P.R. China, and State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - D. G. Evans
- Department of Catalysis Science and Technology and Tianjin Key Laboratory of Applied Catalysis Science & Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, P.R. China, and State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - X. Duan
- Department of Catalysis Science and Technology and Tianjin Key Laboratory of Applied Catalysis Science & Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, P.R. China, and State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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144
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Bian G, Huang Q, Duan X, Li H, Wang X, Zhao H, Gu Y. D-11 A Combined Passive and Active Joints Robotic System for Photodynamic Therapy for Port Wine Stains. J Biomech 2010. [DOI: 10.1016/s0021-9290(10)70162-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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145
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Scanlon LG, Feld WA, Balbuena PB, Sandi G, Duan X, Underwood KA, Hunter N, Mack J, Rottmayer MA, Tsao M. Hydrogen Storage Based on Physisorption. J Phys Chem B 2009; 113:4708-17. [DOI: 10.1021/jp809097v] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. G. Scanlon
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - W. A. Feld
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - P. B. Balbuena
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - G. Sandi
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - X. Duan
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - K. A. Underwood
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - N. Hunter
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - J. Mack
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - M. A. Rottmayer
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
| | - M. Tsao
- Air Force Research Laboratory, Electrochemistry & Thermal Sciences Branch, Wright-Patterson AFB, Ohio 45433, Department of Chemistry, Wright State University, Dayton, Ohio 45435, Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, Air Force Research Laboratory, Major Shared Resource Center, Wright-Patterson AFB, Ohio 45433, and Department of Chemistry, University of
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146
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Lin X, Duan X, Shen T, Chen B, Feng X. 203. Signaling and Functions of SMAD Phosphatases in Development. J Surg Res 2009. [DOI: 10.1016/j.jss.2008.11.244] [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: 10/21/2022]
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147
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Gu D, Kelly TN, Wu X, Chen J, Duan X, Huang JF, Chen JC, Whelton PK, He J. Blood pressure and risk of cardiovascular disease in Chinese men and women. Am J Hypertens 2008; 21:265-72. [PMID: 18188156 DOI: 10.1038/ajh.2007.59] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND We examined the relationship between systolic and diastolic blood pressure (BP) and the incidence of cardiovascular disease (CVD) in a nationally representative cohort of 169,871 men and women > or = 40 years of age in China. METHODS Data on BP and other variables were obtained at a baseline examination in 1991 using standard protocols. Follow-up evaluation was conducted in 1999-2000, with a response rate of 93.4%. RESULTS After adjustment for age, sex, cigarette smoking, alcohol consumption, physical activity, body mass index, education, geographic region, urbanization, and time-dependent history of diabetes, a strong and linear association between both systolic and diastolic BP and incidence of CVD, coronary heart disease and stroke were observed (all P < 0.0001). For example, the relative risks (95% confidence interval (CI)) of CVD incidence were 1.09 (1.00-1.18), 1.25 (1.16-1.35), 1.49 (1.38-1.62), 2.15 (1.99-2.31), 3.01 (2.78-3.27), and 4.16 (3.84-4.51) for those with systolic/diastolic BP of 110-119/75-79, 120-129/80-84, 130-139/85-89, 140-159/90-99, 160-179/100-109, and > or = 180/110 mm Hg compared to those with BP <110/75 mm Hg. Increases in systolic BP were associated with a greater risk of CVD compared to corresponding increases in diastolic BP. The linear trend for increased CVD risk being related to higher BP levels was observed in all subgroups of gender, age, body weight, and cigarette smoking. CONCLUSIONS Our results indicate that there is a strong, linear, and independent relationship between BP levels and the risk of CVD in Chinese adults. Systolic BP is a stronger predictor of CVD risk compared to diastolic BP.
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Abstract
BACKGROUND Acute bronchitis is one of the most common diagnoses made by primary-care physicians. It is traditionally treated with antibiotics (although the evidence for their effectiveness is weak and modest at best), and other even less effective treatments. Chinese medicinal herbs have also been used as a treatment. OBJECTIVES This review aimed to summarise the existing evidence on the comparative effectiveness and safety of Chinese medicinal herbs for treating uncomplicated acute bronchitis. SEARCH STRATEGY We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library, 2007, Issue 1), which includes the Cochrane Acute Respiratory Infections Group's specialised register; MEDLINE (1966 to March Week 1, 2007); EMBASE (1988 to January 2007); The Chinese Cochrane Centre's Controlled Trials Register (up to January 2007); and the Chinese Biomedical Database (CBM) (1980 to January 2007). SELECTION CRITERIA Randomised controlled trials (RCTs) comparing Chinese medicinal herbs with placebo, antibiotics or other Western medicines for the treatment of uncomplicated acute bronchitis. DATA COLLECTION AND ANALYSIS At least two review authors independently extracted data and assessed trial quality. MAIN RESULTS No studies met the inclusion criteria for this review. One study with 300 participants but uncertain randomisation was analysed . The study showed that treatment with the Chinese medicinal herb Huoke granules leads to a shorter duration of cough, fever and sputum compared to using penicillin and Xiaoer Shangfeng Zhike tangjiang syrup. However, the study also lacked allocation concealment and blinding. There was a high possibility of conflict of interest as the Huoke granules were made by the trial author's hospital. AUTHORS' CONCLUSIONS There is insufficient quality data to recommend the routine use of Chinese herbs for acute bronchitis. Study-design limitations of the individual studies meant that no conclusion about the benefits of Chinese herbs could be taken. In addition, the safety of Chinese herbs is unknown due to the lack of toxicological evidence on these Chinese herbs, though adverse events were reported in some case reports.
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Abstract
BACKGROUND Influenza is an acute respiratory communicable disease which, during epidemics, can cause high morbidity and mortality. Traditional Chinese medicinal herbs, often administered following a particular theory, may be a potential medicine of choice. OBJECTIVES To assess the effect of Chinese medicinal herbs in preventing and treating influenza, and to estimate the frequency of adverse effects. SEARCH STRATEGY We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library Issue 1, 2007), which includes the Cochrane Acute Respiratory Infections Review Group specialised register; MEDLINE (January 1966 to January 2007); EMBASE (January 1988 to January 2007); CBM (Chinese Biomedical Database) (January 1980 to January 2007); and the Chinese Cochrane Center's Controlled Trials Register (up to January 2007). We also searched Current Controlled Trials (www.controlled-trials.com) and the National Research Register (http://www.update-software.com/National/) for ongoing trials and reference lists of articles. For more information we telephoned and wrote to researchers in the field, as well as trial authors of studies evaluated in the review SELECTION CRITERIA Randomised controlled trials (RCTs) comparing traditional Chinese medicinal herbs with placebo, no treatment, or chemical drugs normally used in preventing and treating uncomplicated influenza patients. DATA COLLECTION AND ANALYSIS Two review authors independently extracted data and assessed trial quality. MAIN RESULTS Two studies involving 1012 participants were reviewed. The methodological quality of both studies was 'poor'. Included RCTs separately compared two medicinal herbs with two different antiviral drugs, precluding any pooling of results. 'Ganmao' capsules were found to be more effective than amantadine in decreasing influenza symptoms and speeding recovery in one study, (in which adverse reactions were mentioned in the amantadine group although no data were reported). There were no significant differences between 'E Shu You' and ribavirin in treating influenza, nor in the occurrence of adverse reaction. AUTHORS' CONCLUSIONS The present evidence is too weak to support or reject the use of Chinese medicinal herbs for preventing and treating influenza. More RCTs with good methodological quality, larger numbers of participants and clear reporting are needed in the future. We recommend that all the clinical trials registered in the Chinese Clinical Trial Register and Chinese journals join in the Joint Statement of Establishing Chinese Clinical Trial Registration and Publishing System.
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Affiliation(s)
- X Y Chen
- West China Hospital of Sichuan University, Department of Clinical Epidemiology, No 17, Ren Min Nan Lu 3 Duan, Chengdu, Sichuan, China, 610041.
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150
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Moaddel R, Marszałł MP, Bighi F, Yang Q, Duan X, Wainer IW. Automated ligand fishing using human serum albumin-coated magnetic beads. Anal Chem 2007. [PMID: 17579480 DOI: 10.1021/ac070268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human serum albumin, HSA, was immobilized onto the surface of silica-based magnetic beads. The beads were used to isolate known HSA ligands from a mixture containing ligands and nonligands. The separation was accomplished manually and was also automated. The results indicate that an automated "ligand-fishing" technique can be developed using magnetic beads containing an immobilized protein.
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Affiliation(s)
- R Moaddel
- Gerontology Research Center, National Institutes in Aging, National Institutes of Health, Baltimore, Maryland 21224-6825, USA.
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