151
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Luo D, Xu T, Hunke C, Gruber G, Vasudevan S, Lescar J. Crystal structure of the NS3 protease-helicase from dengue virus. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308095664] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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152
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Pan T, Chang J, Riegel A, Ahmad M, Sun X, Luo D. SU-GG-J-138: New Weighted Maximum Intensity Projection (MIP) Images for Assessing Tumor Motion in the Thorax Without a Respiratory Surrogate. Med Phys 2008. [DOI: 10.1118/1.2961687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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153
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Liu T, She R, Wang K, Bao H, Zhang Y, Luo D, Hu Y, Ding Y, Wang D, Peng K. Effects of rabbit sacculus rotundus antimicrobial peptides on the intestinal mucosal immunity in chickens. Poult Sci 2008; 87:250-4. [PMID: 18212367 DOI: 10.3382/ps.2007-00353] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Ninety chickens were randomly divided into 2 groups (45 chickens in each group) to determine the effect of oral administration of rabbit sacculus rotundus antimicrobial peptides (RSRP) on the intestinal mucosal immune responses in chicken. On d 7, 14, 21, and 28, the animals received 0.1 mg of RSRP dissolved in 0.5 mL of physiological saline. The control groups received the same dose of physiological salt solution on the same day. The results showed that RSRP increased the villus height of the duodenum (P < 0.01) and jejunum (P < 0.05) at the ages of 28, 42, and 56 d. The numbers of intestinal intraepithelial lymphocytes in different parts of intestine of the RSRP group were increased significantly more than that of the control (P < 0.01 or P < 0.05) at the ages of 28, 42, and 56 d. The RSRP increased the area of IgA-secreting cells of each fragment of intestine at all 3 time points. These results indicated that the presence of RSRP affected and considerably modified the structure of the intestine and mucosal immune parameters in healthy chickens when compared with controls.
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154
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Liu YJ, Sun XW, Wang Q, Luo D. Electrically switchable optical vortex generated by a computer-generated hologram recorded in polymer-dispersed liquid crystals. OPTICS EXPRESS 2007; 15:16645-16650. [PMID: 19550950 DOI: 10.1364/oe.15.016645] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A computer-generated hologram designed to generate an optical vortex was recorded in a cell filled with polymer-dispersed liquid crystal material under a collimated Ar+ laser beam operating at 514.5 nm. Owing to the photopolymerization-induced phase separation between the polymer and the liquid crystal, an index modulation was formed between the polymer-rich and liquid crystal-rich regions. A good optical vortex beam with high fidelity was reconstructed using a collimated He-Ne laser beam. The diffraction efficiency is estimated to be about 13%-17%. With a suitable voltage applied, the reconstructed optical vortex beam can be switched owing to the index change between the polymer and the liquid crystal.
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155
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Hart J, Guerrero T, Johnson V, Khan M, Luo D, Pan T, Ajani J, Travis E, Komaki R, Liao Z. Radiation Pneumonitis: Correlation of Clinical Toxicity With Pulmonary [18F]-Fluorodeoxyglucose Uptake Dose Response. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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156
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Zhu JW, Luo D, Li CR, Lu Y, Ji X, Zhu J, Ming YL, Shen CH. A case of penile verrucous carcinoma associated with cutaneous horn. Clin Exp Dermatol 2007; 32:213-4. [PMID: 17342801 DOI: 10.1111/j.1365-2230.2006.02289.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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157
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158
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Luo D, Dai Y, Duffy L, Atkinson T. Inhibition of Message for FcɛRI α Chain in RBL Cells Blocks IL-4 Production Induced by Co-Culture with Mycoplasma pneumoniae. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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159
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Hunjan S, Balter P, Rosen I, Starkschall G, Prado K, Vedam S, Luo D, Liu H, Mohan R. 1024. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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160
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Pan T, Luo D, Liu H, Mawlawi O, Chi P, Chang J, Liao Z, Mohan R, Komaki R, Macapinlac H. 2466. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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161
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Starkschall G, Desai N, Balter P, Prado K, Luo D, Cody D, Pan T. SU-DD-A2-03: Assessment of Four-Dimensional CT Image Acquisition Quality. Med Phys 2006. [DOI: 10.1118/1.2240137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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162
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Kudchadker R, Tolani N, Luo D, Kendall R, Mason B, Steadham R, Kanke J, Rosen I, Gillin M, Prado K. SU-FF-T-216: Evaluation and Commissioning of K&S Associates Inc. Diamond Monitor Unit Calculation Software. Med Phys 2006. [DOI: 10.1118/1.2241136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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163
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Yan J, Luo D, Luo Y, Gao X, Zhang G. Induction of G1 arrest and differentiation in MDA-MB-231 breast cancer cell by boehmeriasin A, a novel compound from plant. Int J Gynecol Cancer 2006; 16:165-70. [PMID: 16445628 DOI: 10.1111/j.1525-1438.2006.00291.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Boehmeriasin A is a new phenanthroquinolizidine alkaloid recently isolated from the Boehmeria siamensis Craib (Urticaceae). In vitro biological activity assay demonstrated that this novel compound has wide-range, strong antitumor activity. This study is aimed to determine the effects of boehmeriasin A on breast cancer cell (MDA-MB-231 cell line). Proliferation assay and fluorescence activated cell sorter (FACS) showed that cell growth inhibition and G1 phase arrest of cell cycle were caused by boehmeriasin A. The concentrations resulting in total and 50% growth inhibition are 0.007 and 0.0035 microg/mL, respectively. Exposed in 0.007 microg/mL boehmeriasin A for 12 h, the G1 phase cell percent increased from 44.8% pre-drug treatment to 66.3%. Consistent with G1 arrest and cell growth inhibition, cyclin E2 and cyclin D1 messenger RNA expression in the cell was down-regulated with drug treatment. Then, few apoptotic cells were detected, and most other cells underwent differentiation, which is characterized by specific changes in cell morphology, lots of lipid droplet accumulation, and increasing expression of adipocyte differentiation-related protein. The result first demonstrates that boehmeriasin A potently inhibits the proliferation of breast cancer cell MDA-MB-231 via the G1 phase cell cycle arrest and differentiation induction, and as such, may be considered as candidate chemotherapeutic and/or chemopreventive agent for breast cancer.
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164
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Olsson A, Schwarz G, Szarek M, Luo D. Th-P16:401 Atorvastatin 80 mg in acute coronary syndrome patients ≥65 years: Myocardial ischemia reduction with aggressive cholesterol lowering (MIRACL) study. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82359-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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165
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166
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Liu H, Choi B, Zhang J, Tutt T, Chi M, Wang C, Luo D, Prado K, Mohan R, Dong L, Balter P. Assessing Respiration-Induced Tumor Motion and Margin of Internal Target Volume for Image-Guided Radiotherapy of Lung Cancers. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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167
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Hunjan S, Rosen I, Peter B, Prado K, Luo D, Starkschall G, Liu H, Stevens C, Mohan R. Characterization of Breathing Patterns of Patients undergoing Respiratory-Correlated Imaging. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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168
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Hosseini HG, Luo D, Reynolds KJ. The comparison of different feed forward neural network architectures for ECG signal diagnosis. Med Eng Phys 2005; 28:372-8. [PMID: 16118058 DOI: 10.1016/j.medengphy.2005.06.006] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2004] [Revised: 04/22/2005] [Accepted: 06/22/2005] [Indexed: 11/17/2022]
Abstract
The electrocardiograms (ECGs) record the electrical activity of the heart and are used to diagnose many heart disorders. This paper proposes a two-stage feed forward neural network for ECG signal classification. The research is aimed at the design of an intelligent ECG diagnosis tool that can recognise heart abnormalities while reducing the complexity, cost, and response time of the system. A number of neural network architectures are designed and compared for their ability to classify six different heart conditions. Two network architectures based on one stage and two stage feed forward neural networks are chosen for this investigation. The training and testing ECG signals are obtained from MIT-BIH database. The network inputs are comprised of 12 ECG features and 13 compressed components of each heart beat signal. The performance of the different modules as well as the efficiency of the whole system is presented. Among different architectures, a proposed multi-stage network named NET_BST possesses the highest recognition rate of around 93%. Therefore, this network proves to be a suitable candidate in ECG signal diagnosis systems.
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169
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Pan T, Mawlawi O, Nehmeh S, Erdi Y, Luo D, Liu H, Hunjan S, Balter P, Prado K, Mohan R, Macapinlac H. SU-FF-J-102: A New Method for Improving PET and CT Registration in the Thorax On PET/CT. Med Phys 2005. [DOI: 10.1118/1.1997648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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170
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Balter P, Luo D, Chi P, Choi B, Dong L, Hunjan S, Mohan R, Pan T, Zhang L, Prado K. SU-FF-J-01: A Comparision of 4DCT with Breath-Hold CT for Determination of Tumor Motion with Respiration. Med Phys 2005. [DOI: 10.1118/1.1997547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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171
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Chi P, Pan T, Balter P, Luo D, Mohan R. SU-FF-J-33: Using CT Cine Data as An Alternative Method for Respiratory Phase Analysis and a Potential Method for Tumor Motion Study. Med Phys 2005. [DOI: 10.1118/1.1997579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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172
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Liu H, Wei X, Jang S, Jauregui M, Dong L, Balter P, Luo D, Pan T, Hunjan S, Starkschall G, Rosen I, Prado K, Liao Z, Chang J, Komaki R, Mohan R. SU-FF-J-22: Impact of Respiratory Motion On Dose Distributions and DVHs of Thoracic Structures - Evaluation Using 4DCT. Med Phys 2005. [DOI: 10.1118/1.1997568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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173
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Schlosser M, Banga JP, Madec AM, Binder KA, Strebelow M, Rjasanowski I, Wassmuth R, Gilliam LK, Luo D, Hampe CS. Dynamic changes of GAD65 autoantibody epitope specificities in individuals at risk of developing type 1 diabetes. Diabetologia 2005; 48:922-30. [PMID: 15834701 DOI: 10.1007/s00125-005-1719-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2004] [Accepted: 12/21/2004] [Indexed: 10/25/2022]
Abstract
AIMS/HYPOTHESIS Progression to type 1 diabetes is associated with intramolecular epitope spreading to disease-specific antibody epitopes located in the middle region of glutamic acid decarboxylase 65 (GAD65). METHODS The relationship between intramolecular epitope spreading of autoantibodies specific to GAD65 in relation to the risk of developing type 1 diabetes was tested in 22 high-risk individuals and 38 low-risk individuals. We determined the conformational epitopes in this longitudinal study by means of competition experiments using recombinant Fab of four GAD65-specific monoclonal antibodies. RESULTS Sera from high-risk children in the preclinical stage recognise a specific combination of GAD65 antibody epitopes located in the middle and the C-terminus of GAD65. High risk of progressing to disease is associated with the emergence of antibodies specific for conformational epitopes at the N-terminus and the middle region. Binding to already established antibody epitopes located in the middle and at the N-terminus increases and shows a significant relation (p=0.005) with HLA, which confers risk of developing diabetes. CONCLUSIONS/INTERPRETATION In type 1 diabetes, GAD65 antibodies are initially generated against the middle and C-terminal regions of GAD65. In genetically predisposed subjects the autoimmune response may then undergo intramolecular epitope spreading towards epitopes on the N-terminus and further epitopes located in the middle. These findings clearly demonstrate that the GAD65 autoantibody response in the preclinical stage of type 1 diabetes is dynamic and related to the HLA genotypes that confer risk of diabetes. GAD65-specific Fab should prove useful in predicting progression from islet autoimmunity to clinical onset of type 1 diabetes.
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174
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Bass CD, Dawkins JM, Luo D, Micherdzinska A, Sarsour M, Snow WM, Mumm HP, Nico JS, Huffman PR, Markoff DM, Heckel BR, Swanson HE. Measurement of the Parity-Violating Neutron Spin Rotation in (4) He. JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY 2005; 110:205-8. [PMID: 27308122 PMCID: PMC4849584 DOI: 10.6028/jres.110.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/11/2005] [Indexed: 05/26/2023]
Abstract
In the meson exchange model of weak nucleon-nucleon (NN) interactions, the exchange of virtual mesons between the nucleons is parameterized by a set of weak meson exchange amplitudes. The strengths of these amplitudes from theoretical calculations are not well known, and experimental measurements of parity-violating (PV) observables in different nuclear systems have not constrained their values. Transversely polarized cold neutrons traveling through liquid helium experience a PV spin rotation due to the weak interaction with an angle proportional to a linear combination of these weak meson exchange amplitudes. A measurement of the PV neutron spin rotation in helium (φ PV ( n ,α)) would provide information about the relative strengths of the weak meson exchange amplitudes, and with the longitudinal analyzing power measurement in the p + α system, allow the first comparison between isospin mirror systems in weak NN interaction. An earlier experiment performed at NIST obtained a result consistent with zero: φ PV ( n ,α) = (8.0 ±14(stat) ±2.2(syst)) ×10(-7) rad / m[1]. We describe a modified apparatus using a superfluid helium target to increase statistics and reduce systematic effects in an effort to reach a sensitivity goal of 10(-7) rad/m.
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175
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Shilton A, Pratt S, Drizo A, Mahmood B, Banker S, Billings L, Glenny S, Luo D. 'Active' filters for upgrading phosphorus removal from pond systems. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2005; 51:111-6. [PMID: 16114672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
This paper investigates limestone and iron slag filters as an upgrade option for phosphorus removal from wastewater treatment ponds. A review of 'active' filter technology and the results from laboratory and field research using packed columns of the different media is presented. It is shown that both limestone and iron slag can remove phosphorus but highlights that different types of limestone give markedly different performance. Filter performance appears to be improved by increasing temperature and by the presence of algae, presumably because of its tendency to elevate pH. Performance is related to hydraulic retention time (HRT), but this relationship is not linear, particularly at low HRTs. Importantly for future research, the results from field-testing with pond effluent show significant differences compared to those obtained when using a synthetic feed in the laboratory. For the iron slag filter, higher performance was observed in the field (72% in field vs. 27% in laboratory, at a 12 hour-HRT), while the opposite was observed for the limestone (64% in laboratory vs. 18% in field, at a 12-hour HRT).
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