1
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Zhao CX, Zhong FY, Dong JX, Ge H, Bu J. [Application of machine learning in risk assessment for acute coronary syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2024; 52:311-315. [PMID: 38514336 DOI: 10.3760/cma.j.cn112148-20231024-00375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Affiliation(s)
- C X Zhao
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - F Y Zhong
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - J X Dong
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - H Ge
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - J Bu
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
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2
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Hall J, Sud S, Casey D, Poellmann M, Bu J, Wang A, Hong S, Shen C. Prospective Characterization of Circulating Tumor Cell Kinetics in Patients with Locoregional Head and Neck Cancer Receiving Definitive Therapy. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1318] [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: 11/16/2022]
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3
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Xu K, Cui Y, Yu Y, Wei H, Wang H, Wei Y, Chen Y, Lv D, Yu Y, Bu J. Preparation of Magnesium Aluminate Spinel Nanofibers with High Temperature Resistance by Electrospinning Process Based on Non-Hydrolytic Sol-Gel Method. Russ J Phys Chem B 2022. [DOI: 10.1134/s1990793122040054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Bu J, Zhong W, Li M, He S, Zhang M, Zhang Y, Li Y. CD82 palmitoylation site mutations at Cys5+Cys74 affect EGFR internalization and metabolism through recycling pathway. Acta Biochim Biophys Sin (Shanghai) 2022; 54:400-408. [PMID: 35538033 PMCID: PMC9828285 DOI: 10.3724/abbs.2022011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Tetraspanin CD82 often participates in regulating the function of epidermal growth factor receptor (EGFR) and hepatocyte growth factor receptor (c-Met). Palmitoylation is a post-translational modification that contributes to tetraspanin web formation and affects tetraspanin-dependent cell signaling. However, the molecular mechanisms by which CD82 palmitoylation affects the localization and stability of EGFR and c-Met have not yet been elucidated. This study focuses on the expression and distribution of EGFR and c-Met in breast cancer as well as the related metabolic pathways and molecular mechanisms associated with different CD82 palmitoylation site mutations. The results show that CD82 with a palmitoylation mutation at Cys5+Cys74 can promote the internalization of EGFR. EGFR is internalized and strengthened by direct binding to CD82 with the tubulin assistance and located at the recycling endosome. After studying the recycling pathway marker proteins Rab11a and FIP2, we found that formation of the EGFR/CD82/Rab11a/FIP2 complex promotes the internalization and metabolism of EGFR through the recycling pathway and results in the re-expression of EGFR and CD82 on the cell membrane.
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Affiliation(s)
- Jingya Bu
- Department of Clinical Laboratorythe Second Affiliated Hospital of Dalian Medical UniversityDalian116023China
| | - Weiliang Zhong
- Department of Orthopaedics Surgerythe First Affiliated Hospital of Dalian Medical UniversityDalian116011China,Key Laboratory of Molecular Mechanism for Repair and Remodeling of Orthopaedic DiseasesLiaoning ProvinceDalian116011China
| | - Meixian Li
- Department of Clinical LaboratoryJiangxi Maternal and Child Health HospitalNanchang330000China.
| | - Shuiqing He
- Department of Clinical Laboratorythe Second Affiliated Hospital of Dalian Medical UniversityDalian116023China
| | - Mingzhe Zhang
- Department of Clinical Laboratorythe Second Affiliated Hospital of Dalian Medical UniversityDalian116023China
| | - Yu Zhang
- Department of Clinical Laboratorythe Second Affiliated Hospital of Dalian Medical UniversityDalian116023China
| | - Ying Li
- Department of Clinical Laboratorythe Second Affiliated Hospital of Dalian Medical UniversityDalian116023China,Correspondence address. Tel: +86-17709875388; E-mail:
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5
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Sud S, Hall J, Tan X, Roberts O, Green R, Park S, Poellmann M, Bu J, Hong S, Wang A, Casey D. Prospective Characterization of Circulating Tumor Cell Kinetics in Patients With Oligometastatic Disease Receiving Definitive Radiation Therapy. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.150] [Citation(s) in RCA: 1] [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: 11/30/2022]
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6
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Bai P, Bu J, Li R, Sun P, Sun H, Sun JH. [Operative efficacy of 13 malignant uterine tumors after Cf-252 intracavitary irradiation]. Zhonghua Zhong Liu Za Zhi 2021; 42:882-884. [PMID: 33113632 DOI: 10.3760/cma.j.cn112152-20190903-00570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the surgical therapeutic efficacy of uterine tumors patients underwent Cf-252 neutron intra-cavity and external radiotherapy, and evaluate the application value of Cf-252 neutron radiotherapy. Methods: Thirteen cases of uterine tumor with local suspicious lesions or poor prognostic factors after CF-252 neutron intracavity and external radiotherapy were treated with surgery. Among them, 12 cases underwent extrafascial hysterectomy, 1 case underwent extensive hysterectomy and lymphadenectomy. The postoperative pathology and follow-up results were used to evaluate the efficacy. Results: Nine cases showed severe response to radiotherapy in postoperative cervical pathological tissues without residual tumor, and survived for more than 3-14 years, the median survival time was 8 years. All of 4 cases with residual tumor died within 1 year. Delayed healing of vaginal wounds occurred in 3 of the 12 cases. Conclusions: Cf-252 is a good brachytherapy source. The cervical tissue shows severe response to radiotherapy and prolonged healing time of vaginal wound is observed in some cases after CF-252 radiotherapy. To those uterine tumor patients with local suspicious lesions or poor prognostic factors after CF-252 neutron intracavity and external radiotherapy, extrafascial hysterectomy is a safe and feasible treatment method.
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Affiliation(s)
- P Bai
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Bu
- Department of Radiotherapy, The Third Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - R Li
- Department of Radiotherapy, The Third Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - P Sun
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - H Sun
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J H Sun
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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7
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Wang X, Zhong W, Bu J, Li Y, Li R, Nie R, Xiao C, Ma K, Huang X, Li Y. Exosomal protein CD82 as a diagnostic biomarker for precision medicine for breast cancer. Mol Carcinog 2019; 58:674-685. [PMID: 30604894 DOI: 10.1002/mc.22960] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 12/06/2018] [Accepted: 12/10/2018] [Indexed: 01/02/2023]
Abstract
CD82, a member of the tetraspanin superfamily, has been proposed to exert its activity via tetra-transmembrane protein enriched microdomains (TEMs) in exosomes. The present study aimed to explore the potential of the exosome protein CD82 in diagnosing breast cancers of all stages and various histological subtypes in patients. The results strongly suggest that CD82 expression in breast cancer tissue was significantly lower than that in healthy and benign breast disease tissues. There was a significant negative correlation between CD82 expression in tissues and CD82 content in exosomes, which indicated that CD82 expression was redistributed from tissues to the blood with the development and metastasis of breast cancer.
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Affiliation(s)
- Xiaodan Wang
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Weiliang Zhong
- Department of Orthopaedics, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Jingya Bu
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yuzhong Li
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Ruihua Li
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Rong Nie
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Chenyang Xiao
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Keli Ma
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, China
| | - Xiaohua Huang
- Department of Clinical Biochemistry, College of Laboratory Medicine, Dalian Medical University, Dalian, China
| | - Ying Li
- Department of Clinical Laboratory, Second Affiliated Hospital of Dalian Medical University, Dalian, China
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8
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Lindsay D, Moon D, Mahbooba Z, Park S, Poellmann M, Bu J, Hong S, Wang A. Nano-Based Quantification of Circulating Tumor Cells as a Biomarker of Disease Status in Oligometastatic Patients Following Metastases-Directed Radiation Therapy. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.06.340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Xiang P, Bu J, Qiao Z, Zhuo XY, Wu HJ, Shen M. [Identification of Methamphetamine Abuse and Selegiline Use: Chiral Analysis of Methamphetamine and Amphetamine in Urine]. Fa Yi Xue Za Zhi 2017; 33:599-603. [PMID: 29441766 DOI: 10.3969/j.issn.1004-5619.2017.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To study the content variation of selegiline and its metabolites in urine, and based on actual cases, to explore the feasibility for the identification of methamphetamine abuse and selegiline use by chiral analysis. METHODS The urine samples were tested by chiral separation and LC-MS/MS method using CHIROBIOTIC™ V2 chiral liquid chromatography column. The chiral analysis of methamphetamine and amphetamine were performed on the urine samples from volunteers of selegiline use and drug addicts whom suspected taking selegiline. RESULTS After 5 mg oral administration, the positive test time of selegiline in urine was less than 7 h. The mass concentrations of R(-)-methamphetamine and R(-)-amphetamine in urine peaked at 7 h which were 0.86 μg/mL and 0.18 μg/mL and couldn't be detected after 80 h and 168 h, respectively. The sources of methamphetamine and amphetamine in the urine from the drug addicts whom suspected taking selegiline were analysed successfully by present method. CONCLUSIONS The chiral analysis of methamphetamine and amphetamine, and the determination of selegiline's metabolites can be used to distinguish methamphetamine abuse from selegiline use.
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Affiliation(s)
- P Xiang
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - J Bu
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - Z Qiao
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - X Y Zhuo
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - H J Wu
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - M Shen
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
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Zhang D, Liang H, Bu J, Xiong L, Huang S, Zhang DD, Liang HB, Bu J, Xiong L, Huang SM. UV curable soybean-oil hybrid systems based on thiol-acrylate and thiol-ene-acrylate chemistry. J Appl Polym Sci 2015. [DOI: 10.1002/app.42095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Dandan Zhang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Hongbo Liang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Jiang Bu
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Lei Xiong
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Shengmei Huang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - D. D. Zhang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - H. B. Liang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - J. Bu
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - L. Xiong
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - S. M. Huang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
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11
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Maeda A, Bu J, Chen E, DaCosta R. PD-0430: Studying the effect of radiation on vascular function and tumor microenvironment using intravital imaging. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)30535-1] [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: 10/23/2022]
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12
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Bu J, Zhan C, Huang Y, Shen B, Zhuo X. Distinguishing Heroin Abuse from Codeine Administration in the Urine of Chinese People by UPLC-MS-MS. J Anal Toxicol 2013; 37:166-74. [DOI: 10.1093/jat/bks093] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
BACKGROUND Treatment uptake and elapsed times along the care path have emerged as potential quality indicators for cancer care delivery. This retrospective study examined changes in adjuvant chemotherapy uptake and elapsed times along the care path for patients in 2005 and in 2007 who had early-stage non-small-cell lung cancer (nsclc) and who underwent curative-intent surgery in Nova Scotia, Canada. METHODS All patients who underwent curative-intent surgery for stages i-iii nsclc in the two years of interest were included. Logistic regression and general linear models were used to examine factors associated with chemotherapy uptake patterns and, at various resolutions (low, intermediate, high), elapsed times between all care events in the care path. RESULTS In the 223 patients who underwent curative-intent surgery (108 in 2005, 115 in 2007), several factors were associated with uptake patterns and elapsed times. Cohort year (2007 vs. 2005) was not associated with referral to medical oncology [odds ratio (or): 1.05; 95% confidence interval (ci): 0.51 to 2.15; p = 0.905], but it was associated with less treatment after referral (or: 0.34; 95% ci: 0.11 to 1.00; p = 0.057) and less overall uptake (or: 0.35; 95% ci: 0.13 to 0.95; p = 0.040). Patients were referred sooner to medical oncology in 2007 than in 2005 (21 days vs. 35 days, p = 0.008), but experienced longer waits between consultation and chemotherapy delivery (18 days vs. 7 days, p = 0.001). CONCLUSIONS Significant differences were observed in care patterns over time. Frequent monitoring of care patterns at high resolution may optimize insights into emerging trends within cancer care systems.
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Affiliation(s)
- S. Gray
- Division of Medical Oncology, Department of Medicine, QEII Health Sciences Centre, Halifax, NS
| | - J. Bu
- Surveillance and Epidemiology Unit, Cancer Care Nova Scotia, Halifax, NS
| | - N. Saint-Jacques
- Surveillance and Epidemiology Unit, Cancer Care Nova Scotia, Halifax, NS
| | - D. Rayson
- Division of Medical Oncology, Department of Medicine, QEII Health Sciences Centre, Halifax, NS
| | - T. Younis
- Division of Medical Oncology, Department of Medicine, QEII Health Sciences Centre, Halifax, NS
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Zhang QQ, Wang JG, Wang MW, Bu J, Zhu SW, Wang R, Gao BZ, Yuan XC. A modified fractal zone plate with extended depth of focus in spectral domain optical coherence tomography. J Opt 2011; 13:10.1088/2040-8978/13/5/055301. [PMID: 24353894 PMCID: PMC3864818 DOI: 10.1088/2040-8978/13/5/055301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In optical coherence tomography (OCT) systems, there is a trade-off between the depth of focus (DOF) and lateral resolution when conventional lenses are used. We propose a new method that employs a modified fractal generalized zone plate (MFraGZP) combined with a conventional lens to improve the trade-off effect, with an extended DOF of about 2.5 mm (14 times larger) while the lateral resolution is maintained at ~9.5 μm. As an example, images of the calibration microspheres are obtained and demonstrated with the extended DOF in a spectral domain OCT system.
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Affiliation(s)
- Q Q Zhang
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - J G Wang
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - M W Wang
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - J Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - S W Zhu
- Nankai University Affiliated Hospital, Tianjin 300121, People’s Republic of China
| | - R Wang
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - Bruce Z Gao
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - X-C Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
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15
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Yuan GH, Yuan XC, Bu J, Tan PS, Wang Q. Manipulation of surface plasmon polaritons by phase modulation of incident light. Opt Express 2011; 19:224-229. [PMID: 21263560 DOI: 10.1364/oe.19.000224] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Manipulation of surface plasmon polaritons (SPP) by phase modulation of incident light beams is proposed with analytical and numerical verifications when an optical vortex (OV) beam is employed as an example. Fundamental functionalities of a plasmonic chip such as in-plane focusing, coupling and multiplexing of SPP by sequentially varying the topological charge of OV beam are demonstrated. Complementary to the manually-controlled optical-path-different technique reported in literature, the proposed method reveals a direct phase transform from OV beam to SPP with dynamic and reconfigurable advantages.
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Affiliation(s)
- G H Yuan
- School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore, Singapore
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16
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Khoo H, Bu J, Wong R, Kuan S, Sharratt P. Carbon capture and utilization: Preliminary life cycle CO2, energy, and cost results of potential mineral carbonation. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.egypro.2011.02.145] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Wang Q, Bu J, Yuan GH, Tan PS, Teng JH, Yuan XC. Deterministic relief dielectric structures to realize phase modulation of surface-plasmon polaritons. Opt Lett 2010; 35:4196-4198. [PMID: 21165135 DOI: 10.1364/ol.35.004196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We propose a modified effective-refractive-index model for the design of relief dielectric structures on a metal surface to realize phase modulation of surface-plasmon polaritons (SPPs). In this model, the length of the dielectric structure is optimized to reach phase shifting between the SPP waves transmitted through dielectric structure and those directly propagated with the consideration of SPP losses. Specifically, a one-dimensional dielectric Fresnel zone plate is designed by employing the proposed model to demonstrate phase modulation of SPPs for the highest focusing efficiency.
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Affiliation(s)
- Q Wang
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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18
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Porter GA, Urquhart R, Bu J, Johnson P, Grunfeld E. The impact of audit and feedback on nodal harvest in colorectal cancer (CRC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6017] [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: 11/20/2022] Open
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19
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Gray SL, Bu J, Saint-Jacques N, Rayson D, Younis T. Changes in chemotherapy uptake and wait times in early-stage non-small cell lung cancer (NSCLC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6049] [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: 11/20/2022] Open
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20
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Urquhart R, Bu J, Porter GA, Dewar R, Moineddin R, Grunfeld E. Relationship between survival and lymph node assessment from a population-based study of colorectal cancer patients. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6125] [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: 11/20/2022] Open
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21
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Zhang DG, Yuan XC, Bu J, Yuan GH, Wang Q, Lin J, Zhang XJ, Wang P, Ming H, Mei T. Surface plasmon converging and diverging properties modulated by polymer refractive structures on metal films. Opt Express 2009; 17:11315-11320. [PMID: 19582045 DOI: 10.1364/oe.17.011315] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polymer refractive microstructures are fabricated on metallic thin films and employed to modulate surface plasmons (SPs) propagations in a refractive manner. SP waves converging with different focal lengths and diverging effects are realized by the refractive structures. Authors investigated the modulation effect on SP waves as a function of different thicknesses and different shapes of the polymer micro-structures based on the effective refractive index model, where imaging properties of the SPs are observed experimentally by detecting the leaky radiation intensity of the SPs.
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Affiliation(s)
- D G Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
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22
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Abstract
Surface plasmons excited by a focused femtosecond radially polarized beam on a metal surface form a standing wave pattern with a sharp peak that can be used as a "virtual probe" for surface plasmon microscopy. The rotational symmetry of radially polarized light effectively provides the TM polarization required for coupling to the surface plasmons while the short pulse nature of the probe allows for nonlinear processes to be studied.
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Affiliation(s)
- K. J. Moh
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
| | - X.-C. Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
- Corresponding author:
| | - J. Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
| | - S. W. Zhu
- Tianjin Union Medicine Centre, Tianjin 300121, China
| | - Bruce Z. Gao
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, USA
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23
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Abstract
We demonstrate the proof-of-concept for surface plasmon resonance sensing and imaging via a virtual probe at the cell-substrate interface of a biological cell in aqueous media. The technique is based on the optical excitation by focused radially polarized beams of localized surface plasmons, which forms a virtual probe on the metal substrate. The intensity distribution at the back focal plane of the objective lens enables quantitative measurements to be made of the cell-substrate contact. The acquired data is then visualized in the form of a local refractive index map.
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Affiliation(s)
- K.J. Moh
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - X.-C. Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
- Corresponding author:
| | - J. Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
| | - S. W. Zhu
- Tianjin Union Medicine Centre, Tianjin 300121, China
| | - Bruce Z. Gao
- Department of Bioengineering and Center for Optical Materials Science and Engineering Technologies, Clemson University, 501-5 Rhodes Research Center, Clemson, South Carolina 29634, USA
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Abstract
A multi-element design scheme is proposed to produce optical vortices of large spectrum width. The key component within the approach is a radially modulated spiral phase plate. Apart from a conventional spiral phase plate having an azimuthal phase function, the proposed element possesses an additional change of phase in the radial direction.
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Affiliation(s)
- X-C Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China.
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25
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Yuan XC, Zhu SW, Bu J, Sun YY, Lin J, Gao BZ. Large-angular separation of particles induced by cascaded deflection angles in optical sorting. Appl Phys Lett 2008; 93:263901-363903. [PMID: 23997243 PMCID: PMC3757087 DOI: 10.1063/1.3040697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A composite microlens array (MLA) with two cascaded guiding axes has been fabricated to achieve a large lateral separation of an object with different refractive indices or sizes. The MLA projects a composite pattern formed by its focal spots into a microchamber for optical sorting in a microscopic system. This approach enables passive, high power, efficient, and continuous microfluidic sorting without requiring complicated optical assembly. Separation of particles with different refractive indices to a lateral angle of 40° is experimentally demonstrated with moderate laser power.
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Affiliation(s)
- X.-C. Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China
| | - S. W. Zhu
- Tianjin Union Medicine Centre, Tianjin 300121, China
| | - J. Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China
| | - Y. Y. Sun
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
| | - J. Lin
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
| | - Bruce Z. Gao
- Department of Bioengineering and Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, South Carolina 29634, USA
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26
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Moh KJ, Yuan XC, Bu J, Burge RE, Gao BZ. Generating radial or azimuthal polarization by axial sampling of circularly polarized vortex beams. Appl Opt 2007; 46:7544-7551. [PMID: 17952194 DOI: 10.1364/ao.46.007544] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A laser beam with circular polarization can be converted into either radial or azimuthal polarization by a microfabricated spiral phase plate and a radial (or azimuthal)-type linear analyzer. The resulting polarization is axially symmetric and is able to produce tightly focused light fields beyond the diffraction limit. We describe in detail the theory behind the technique and the experimental verification of the polarization both in the far field and at the focus of a high numerical aperture lens. Vector properties of the beam under strong focusing conditions were observed by comparing the fluorescence images corresponding to the focal intensity distribution for both radial and azimuthal polarizations. The technique discussed here may easily be implemented to a wide range of optical instruments and devices that require the use of tightly focused light beams.
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Affiliation(s)
- K J Moh
- Photonics Research Centre, School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore
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27
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Lin J, Yuan XC, Bu J, Ahluwalia BP, Sun YY, Burge RE. Selective generation of high-order optical vortices from a single phase wedge. Opt Lett 2007; 32:2927-2929. [PMID: 17938655 DOI: 10.1364/ol.32.002927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate that it is possible to generate high-order optical vortices from a single phase wedge by applying an incident beam with an annular intensity distribution. Various topological charges of optical vortices are realized by a static phase wedge when the position and radius of the annular illumination are changed accordingly.
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Affiliation(s)
- J Lin
- Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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28
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Lin J, Yuan XC, Bu J, Chen HL, Sun YY, Burge RE. Generalized model for orbital angular momentum states generated by parallel aligned phase wedges. Opt Lett 2007; 32:2170-2. [PMID: 17671573 DOI: 10.1364/ol.32.002170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A generalized model of a double-wedge phase element containing two side-by-side parallel phase ramps with arbitrary slope angles is proposed. We study the diffracted optical field of a double-wedge element in terms of orbital angular momentum states. Analytical calculations reveal how the radius and position of the illuminating laser beam affect the composition of orbital angular momentum generated by the phase wedges.
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Affiliation(s)
- J Lin
- Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore
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29
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Shen L, He B, Zeng J, Zhou L, Hu L, Wang L, Bu J, Wang B. PO9-263 OXIDIZED LOW-DENSITY LIPOPROTEIN INDUCES DIFFERENTIATION OF RAW264. 7 MURINE MACROPHAGE CELL LINE INTO DENDRITIC LIKE CELLS. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71273-4] [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: 10/23/2022]
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30
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He M, Yuan XC, Bu J, Ong BH. Improved silica-zirconia sol synthesis for fabrication of a single-mode embedded dielectric channel waveguide with low transmission losses. Appl Opt 2007; 46:302-6. [PMID: 17228373 DOI: 10.1364/ao.46.000302] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A novel inorganic-organic hybrid silica-zirconia solgel material, which can generate 10 microm thick film in a single spin-coating process, has been developed and employed in the fabrication of an embedded dielectric channel waveguide on a silica buffer layer of a silicon substrate. The fabricated channel waveguide core had steep ridge walls, good smoothness, and high robustness, and the novel sol synthesis enabled a precise control of the geometrical and optical parameters of the embedded dielectric channel waveguide. In the 1.55 microm telecommunication window, the fundamental modes TE(00) and TM(00) in the embedded channel waveguide had low transmission losses of 0.40 +/- 0.03 dB/cm and 0.59 +/- 0.03 dB/cm, respectively.
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Affiliation(s)
- M He
- Nanyang Technologial University, Singapore.
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31
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Ahluwalia BPS, Cheong WC, Yuan XC, Zhang LS, Tao SH, Bu J, Wang H. Design and fabrication of a double-axicon for generation of tailorable self-imaged three-dimensional intensity voids. Opt Lett 2006; 31:987-9. [PMID: 16599233 DOI: 10.1364/ol.31.000987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We propose a new design for fabrication of a highly power-efficient double axicon to generate self-imaged three-dimensional intensity voids along the propagation of a beam. The conventional conical structure of an axicon is modified and shaped like an axiconlike structure with a double-gradient surface profile. The gradient conical surfaces generate Bessel beams with varying radial wave vectors that are superimposed and interfere to generate a sequence of three-dimensional intensity voids. The proposed element was fabricated using electron-beam lithography, and experimental verification of the design is reported.
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Affiliation(s)
- B P S Ahluwalia
- School of Electrical & Electronic Engineering, Nanyang-Technological University, Nanyang Avenue, Singapore 639798, Singapore
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32
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Kang J, Bu J, Hao Y, Chen F. Subtoxic concentration of doxorubicin enhances TRAIL-induced apoptosis in human prostate cancer cell line LNCaP. Prostate Cancer Prostatic Dis 2005; 8:274-9. [PMID: 15897917 DOI: 10.1038/sj.pcan.4500798] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Most tumor cells are sensitive to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis but sparing to normal cells, thus providing therapeutic potential for clinical use. Some tumor cells are resistant to TRAIL-induced cell death while the sensitivity could be recruited with the existence of some chemical agents. In this study, human prostatic cancer cell line LNCaP was found to be resistant to TRAIL-induced apoptosis while it could be restored to TRAIL sensitivity with combination treatment of low concentration of doxorubicin. TRAIL receptor-1 (DR4) and TRAIL receptor-2 (DR5) were upregulated under the treatment of doxorubicin and verified to be responsible for TRAIL-mediated signal transduction. Furthermore, caspase-8 and caspase-3 were activated and drove their autocleavage into programmed cell death. Interestingly, apoptosis-inhibitory protein c-FLIP, but not Bcl-2 and XIAP was downregulated after doxorubicin treatment. Taken together, these findings suggested that the pathway of cell apoptosis induced by TRAIL was intact but under negative control. Subtoxic concentration of doxorubicin effectively boosted TRAIL sensitivity via depletion of antiapoptotic protein. These findings support the new strategies for killing tumors with TRAIL and chemical agents.
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Affiliation(s)
- J Kang
- Department of Urology, Xinhua hospital, Shanghai Second Medical University, Shanghai, PR China.
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33
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He M, Yuan XC, Ngo N, Bu J, Tao S. Low-cost and efficient coupling technique using reflowed sol-gel microlens. Opt Express 2003; 11:1621-1627. [PMID: 19466040 DOI: 10.1364/oe.11.001621] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper, we present a novel reflow technique for the fabrication of an elliptical microlens array in sol-gel glass. The fabricated refractive microlens array has a very smooth surface, and structural and dimensional conformity with the designed parameters. It is shown that the microlens array can provide high coupling efficiency of a laser diode to a single mode fiber, and relax the lateral and axial misalignment tolerance. The microlens coupling technique has the advantages of low coupling loss, large misalignment tolerances, and small package volume.
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34
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Tao SH, Yuan X, Cheong W, Bu J, Kudryashov V. Optimized polarization-selective computer-generated hologram with fewer phase combinations. Opt Express 2003; 11:1252-1257. [PMID: 19465991 DOI: 10.1364/oe.11.001252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Normally, to incorporate two binary conventional computer-generated holograms (CGHs) into a single polarization-selective computer-generated hologram (PSCGH), the respective pixels of the conventional CGHs will result in 4 different combinations of the phase values. Thus, the 4 phase combinations have to be realized by 4 types of pixel structures in a PSCGH. In this paper, we propose a method to reduce the PSCGH's 4 phase combinations to 3 using an optimization approach. The PSCGH's first-order diffraction efficiency is 30% and the contrast ratio is 28 after the optimization.
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35
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Abstract
A simple reflow method for fabrication of refractive microlens arrays in inorganic-organic SiO2-ZrO2 solgel glass is presented. To our knowledge, this is the first report that presents a simple reflow technique for transforming a negatively induced hybrid solgel material into desirable spherical microlenses. It is shown that the microlenses have excellent smooth surfaces and uniform dimensions. The reflow technique is considerably cheaper than use of a high-energy beam-sensitive gray-scale mask and is suitable for mass production.
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Affiliation(s)
- M He
- School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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36
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Bu J, Song Y, Rompato G, Burgess DJ, Garmendia AE. Co-delivery of IL-2 or liposomes augment the responses of mice to a DNA vaccine for pseudorabies virus IE180. Comp Immunol Microbiol Infect Dis 2003; 26:175-87. [PMID: 12581747 DOI: 10.1016/s0147-9571(02)00050-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Recently we have demonstrated, with a DNA vaccine, that the immediate early protein (IE180) of pseudorabies virus provides a moderate level of protection in mice. In order to improve its immunogenicity and protective capacity, this IE180 DNA vaccine was delivered to C3H/HeJ mice either in combination with an IL-2 expressing plasmid or complexed with cationic liposomes. Co-delivery of the vaccine and IL-2 DNA by gene gun resulted in seroconversion in 5/5 of the vaccinated mice after a single administration, whereas two intramuscular (i.m.) injections were required to achieve seroconversion in all mice. Antibody and delayed-type hypersensitivity responses were augmented in mice, which received the DNA vaccine and the IL-2 gene compared to those of mice receiving the DNA vaccine alone. In addition, the time of death after challenge was significantly delayed in mice, which received the IL-2 gene. The proportion of surviving mice (40%), however, was similar to that obtained in mice which received the vaccine alone by gene gun. Liposome-mediated vaccine delivery also resulted in a higher rate of seroconversion when compared with that induced by the naked DNA vaccine. Thus, all vaccinated mice seroconverted after either two i.v. or three i.m. injections of the liposome/DNA complex, with 40 and 25% of these mice being protected against challenge, respectively. These data support that co-administration of the IE180 DNA vaccine with the IL-2 gene or delivery in liposomes are two effective approaches to increase its immunogenicity.
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MESH Headings
- Animals
- Antibodies, Viral/biosynthesis
- Antibodies, Viral/blood
- Female
- Genetic Vectors
- Herpesvirus 1, Suid/immunology
- Hypersensitivity, Delayed
- Immediate-Early Proteins/immunology
- Injections, Intramuscular/veterinary
- Injections, Intravenous/veterinary
- Interleukin-2/administration & dosage
- Interleukin-2/genetics
- Interleukin-2/immunology
- Liposomes
- Mice
- Mice, Inbred C3H
- Pseudorabies/prevention & control
- Pseudorabies Vaccines/administration & dosage
- Pseudorabies Vaccines/genetics
- Pseudorabies Vaccines/immunology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
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Affiliation(s)
- J Bu
- Department of Pathobiology and Veterinary Science, University of Connecticut, Storrs, CT 06269, USA
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37
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Shen M, Xiang P, Huang Z, Liu W, Shen B, Bu J. [Abuse of "pheticol" and its interference to the analysis of methamphetamine]. Fa Yi Xue Za Zhi 2002; 14:129-31, 190. [PMID: 11938882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The study was to eliminate interference from ephedrine in the analysis of methamphetamine. The extraction procedure for methamphetamine was modified to include an oxidation step (2 ml urine specimen was treated with 0.5 ml of 1 mol/L phosphate buffer (pH 6.8) and 0.5 ml 0.3 mol/L sodium periodate). Results showed that ephedrine could be oxidized in the presence of periodate ions into smaller fragments while leaving methamphetamine intact. It is recommended that specimens be treated with sodium periodate prior to extraction in order to eliminate any interference caused by ephedrine.
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39
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Abstract
The stability of tetramine, morphine and meperidine in formalin solution is an important factor for drug analysis in forensic investigation. In this paper, the tissues (liver, kidney, lung and heart) from poisoned rabbits were immersed in 50 ml 10% formalin solutions for 4 months before examination. We compared the levels of tetramine, morphine, meperidine and the main metabolite normeperidine, measured by GC/NPD or GC-MS, in frozen rabbit tissues, formalin-fixed rabbit tissues, and formalin solution. There was a decrease in the levels of tetramine, morphine, meperidine in formalin-preserved tissues compared with the levels of these drugs in the frozen tissues. It is suggested that the formalin-fixed tissues and formalin solution should be analyzed at the same time to assure the accurate results.
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Affiliation(s)
- P Xiang
- Department of Forensic Chemistry, Institute of Forensic Science, Ministry of Justice, Guangfu Xi Road 1347, Shanghai 200063, PR China.
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40
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Bu J, Zou Y. [Hard nucleus chopping technique for non-phacoemulsification in small-incision cataract surgery: two-knife chopping]. Yan Ke Xue Bao 2001; 17:93-5. [PMID: 12567759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
PURPOSE To search for a practical nuclear chopping technique for non-phacoemulsification in small-incision cataract surgery. METHODS We designed two choppers for dividing nucleus in cataract surgery. We used them in our clinical practice of hard nuclear cataract surgery and thus improved the choppers constantly. RESULTS Two hundred and forty-six cases (246 eyes) of cataract with their nuclei being Grade III or harder were involved in our observation. Nucleus had been divide into two halves at one chopping and the nuclear halves were delivered through a 4.5 mm incision safely in all cases. Visual acuity was 0.5 or better in 189 eyes (73.8%), 232 eyes (94.9%) and 241 eyes (97.9%) one day, seven days and three months respectively after surgery. Complications included corneal edema near the incision in 12% eyes and folding of the Descemet membrane in 25% eyes. CONCLUSION Two-knife chopping technique has the advantages of reasonable design, small incision, little injury, no limitation by hard nucleus and easy manipulation. It is a practical and ideal chopping technique in non-phacoemulsification small-incision cataract surgery.
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Affiliation(s)
- J Bu
- Department of Ophthalmology, Jili Hospital, Liuyang, Hunan 410300, China
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41
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Bu J, Yan L, Chen Y, Chu JX, Xie XF, Chen TP. [Prospective study of lethal blood concentration of organophosphorous in humans]. Fa Yi Xue Za Zhi 2001; 17:21-4, 62. [PMID: 12533887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Total cases of organophosphorous (dichlorvos, methamidophos, dimethoate) poisoning outpatients from six hospitals during four years were collected consecutively for lethal blood concentration study. Blood samples were detected with gas chromatography. The probabilities of death, coma were analyzed with Bliss method and their linear regressive equations of probit were obtained respectively, their 50% lethal concentrations (LC50) and 50% coma concentrations(CC50) were calculated by the formulas above. As the death rate was influenced by therapy, its natural death probability has been discussed and estimated their natural LC50 were between the LC50 and CC50 themselves. Combined LC50 and CC50, their natural LC50 were calculated.
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Affiliation(s)
- J Bu
- Institute of Forensic Sciences, Ministry of Justice, Shanghai 200063
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42
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Bu J, Akhtar N, Nishiyama A. Transient expression of the NG2 proteoglycan by a subpopulation of activated macrophages in an excitotoxic hippocampal lesion. Glia 2001; 34:296-310. [PMID: 11360302 DOI: 10.1002/glia.1063] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cells that express the NG2 proteoglycan (NG2+ cells) constitute a large glial population in the normal mature rodent brain. They can differentiate into oligodendrocytes but are distinct from mature oligodendrocytes, astrocytes, microglia, and neurons. Changes in NG2+ cells were examined in kainic acid-induced excitotoxic lesions of the hippocampus, and the relationship between NG2+ cells and reactive astrocytes and microglia was investigated between 1 and 90 days after lesioning. Two types of reactive NG2+ cells with altered morphology and increased NG2 immunoreactivity were observed in the lesion. Early changes, consisting of an increase in NG2 immunoreactivity and the number of processes, were apparent 24 h after lesioning and persisted through 3 months. These cells were distinct from reactive astrocytes or activated microglia/macrophages. A second type of reactive NG2+ cells appeared 2 weeks after injection, following an influx of macrophages. They had large, round cell bodies with short processes and expressed the microglia/macrophage antigens OX42 and ED1. Single cells coexpressing NG2 and macrophage/microglial antigens could be isolated from the lesion. The number of NG2+/OX42+ cells gradually declined and disappeared by 3 months after injection. They did not express glial fibrillary acidic protein or the alpha receptor for platelet-derived growth factor, indicating that they are distinct from astrocytes or oligodendrocyte progenitor cells. Cells that coexpressed NG2 and OX42 were never observed in hippocampal slice cultures treated with kainic acid, suggesting that NG2+/OX42+ cells are not derived from endogenous resident brain cells. These findings demonstrate that NG2 expression is transiently upregulated on activated macrophages/microglia that appear during the chronic stage in an excitotoxic lesion in the adult CNS.
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Affiliation(s)
- J Bu
- Department of Physiology and Neurobiology, University of Connecticut, Storrs, Connecticut 06269, USA
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43
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Bu J, Pang J, Bu R. [Study on the role of human papillomavirus in carcinogenesis of oral papillomas by in situ hybridization]. Zhonghua Kou Qiang Yi Xue Za Zhi 2001; 36:34-6. [PMID: 11812300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To explore the role of human papillomavirus (HPV) infection on carcinogenesis of oral squamous cell papillomas (SCP). METHODS By using digoxin labelled HPV 6/11 and HPV 16/18 probes, through hybridization in situ technique, the HPV DNA sequence in 30 cases of oral SCP were detected. RESULTS Among them, 16 cases (53.3%) were positive for HPV 6/11 DNA. None of cases of SCP were positive for HPV 16/18 DNA. CONCLUSION Our results show that the frequent finding of HPV 6/11 DNA in oral SCP had close association between oral papillomas and HPV 6/11 infection.
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Affiliation(s)
- J Bu
- Department of Stomatology, General Hospital of PLA, Beijing 100853, China
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45
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46
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Wu Q, Miller RH, Ransohoff RM, Robinson S, Bu J, Nishiyama A. Elevated levels of the chemokine GRO-1 correlate with elevated oligodendrocyte progenitor proliferation in the jimpy mutant. J Neurosci 2000; 20:2609-17. [PMID: 10729341 PMCID: PMC6772229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
The dysmyelinating mutant jimpy (jp) arises from a point mutation in the mouse gene encoding proteolipid protein and is characterized by severe dysmyelination attributable to oligodendrocyte death. This mutant was used to investigate the regulation of oligodendrocyte progenitor proliferation in the postnatal spinal cord. At postnatal day 18, jp spinal cord contained a three- to eightfold greater number of proliferating oligodendrocyte progenitor cells than did wild-type (wt) spinal cord. Increased proliferation in jp spinal cord was accompanied by a twofold increase in the number of progenitor cells. Semiquantitative reverse transcriptase-PCR revealed no change in the level of mRNA encoding the platelet-derived growth factor A, transforming growth factor-beta, or insulin-like growth factor-I, all of which have been implicated as regulators of proliferation and differentiation of oligodendrocyte progenitor cells. There was, however, a 17-fold increase in the level of mRNA encoding the chemokine GRO-1 and a 5- to 6-fold increase in GRO-1 protein in the jp spinal cord. Double immunofluorescence labeling revealed elevated levels of GRO-1 in reactive astrocytes in jp spinal cord white matter. In vitro studies indicated that extracts from jp spinal cord stimulated oligodendrocyte progenitor proliferation. Furthermore, removal of GRO-1 from jp extracts by immunoprecipitation reduced the proliferation of progenitor cells to a level similar to that achieved by wt extracts. These findings suggest a novel mechanism by which proliferation of oligodendrocyte progenitor cells is regulated in the postnatal spinal cord in response to insult.
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Affiliation(s)
- Q Wu
- Department of Neurosciences, The Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA
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47
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Bu J, Song Y, Burgess DJ, Garmendia AE. Increased immunogenicity of a DNA vaccine encoding pseudorabies virus IE180 protein by co-administration of IL-2 or by delivery in liposomes. Vet Res 2000. [DOI: 10.1051/vetres:2000011] [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: 11/14/2022] Open
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48
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Shen M, Xiang P, Shen BH, Liu W, Huang ZJ, Bu J, Wu HJ. [Segmental analysis of hair from meperidine abusers and evaluation of the results]. Fa Yi Xue Za Zhi 1999; 15:204-7, 210, 254-5. [PMID: 12536434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Using meperidine abusers as subjects for this study, we detected in hair meperidine and its metabolites normeperidine, N-OCH3-meperidine and N-AC-meperidine. The content of meperidine and normeperidine of 60 abusers were 103 +/- 130 ng/mg and 117 +/- 143 ng/mg respectively. Meperidine was stably present in hair for at least 20 months. Normeperidine level decreased from hair root to tip. The segmental analysis of hair revealed that there were correlations between the drug abuse history and the distribution of drug along the hair shaft, and between the dose of meperidine and its content presented in hair.
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Affiliation(s)
- M Shen
- Institute of Forensic Sciences, Ministry of Justice, Shanghai 200063, P. R. China
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49
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Wu HJ, Shen M, Xian P, Xiang P, Shen BH, Bu J, Huang ZJ. [Determination of metabolites of heroin in urine and discrimination of heroin abuse]. Fa Yi Xue Za Zhi 1999; 15:93-4, 125. [PMID: 12536409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
This article describes a sensitive method that detects morphine, 6-monoacetylmorphine, morphine-3-glucuronide and codeine in urine for qualifying the abuse of heroin. The analytes were extracted by solid phase C18. The limits of detection (LOD) for morphine and codeine were 50 ng/ml and 50 ng/ml, respectively. The RSD of morphine and codeine were 11.3% (n = 5), and 14.2% (n = 5) respectively. For urine, it does not need to be hydrolyzed before extracted, and for all analytes, also need not to be derivated. The difference ratio of morphine and codeine in the chromatography can be used to discriminate between the abuse of heroin and the administration of compound liquorice mixture.
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Affiliation(s)
- H J Wu
- Institute of Forensic Sciences, Ministry of Justice, Shanghai 200063, P. R. China
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Liu W, Shen M, Zhuo XY, Bu J, Xiang P, Wu HJ, Huang ZJ. [Analysis of penicillins in whole blood by reversed high-performance liquid chromatography]. Fa Yi Xue Za Zhi 1999; 15:19-20, 63. [PMID: 12536392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
A reversed-HPLC method was established to determinate penicillins in whole blood. Thiamphenicol as internal standard was added to 0.5 ml blood. Proteins in blood were precipitated with acetonitrile, then the separate supernatant was directly injected onto the chromatography column. The range of five penicillins' linearities was 0.9918 to 0.9996, their range of relative recovery was 91.75% to 107.33%, their CV was 3.56% to 9.85%. Effects of different storage temperatures on the stability of analytes and interference of other antibiotics were also studied.
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Affiliation(s)
- W Liu
- Institute of Forensic Sciences, Ministry of Justice, Shanghai 200063, P. R. China
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