451
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Fluck O, Gu X, Men C, Choi D, Majumdar A, Jiang S. SU-GG-T-255: Development of a Computational Infrastructure for GPU-Based Online Adaptive Radiation Therapy. Med Phys 2010. [DOI: 10.1118/1.3468647] [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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452
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Li R, Lewis J, Jia X, Zhao T, Lamb J, Yang D, Low D, Jiang S. SU-GG-J-93: PCA-Based Lung Motion Model. Med Phys 2010. [DOI: 10.1118/1.3468317] [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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453
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Tian Z, Xun J, Yuan K, Jiang S. TU-B-201B-03: CT Reconstruction from Undersampled Projection Data Via Edge-Preserving Total Variation Regularization. Med Phys 2010. [DOI: 10.1118/1.3469199] [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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454
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Cerviño L, Lawson J, Taylor M, Jiang S, Pawlicki T. SU-GG-T-526: Clinical Implementation of a Novel Frameless and Maskless Stereotactic Radiosurgery Treatment. Med Phys 2010. [DOI: 10.1118/1.3468923] [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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455
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Jiang S, Gu X, Men C, Jia X, Fluck O, Choi D, Majumdar A. TH-C-BRA-05: Real-Time Re-planning for Online Adaptive Radiotherapy. Med Phys 2010. [DOI: 10.1118/1.3469484] [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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456
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Park J, Park S, Kim J, Han Y, Cho M, Kim H, Liu Z, Jiang S, Song W. SU-GG-I-44: Ultra-Fast Digital Tomosynthesis Reconstruction Using CUDA Programming for Real-Time Image-Guided Radiation Therapy. Med Phys 2010. [DOI: 10.1118/1.3468077] [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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457
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Gu X, Jelen U, Men C, Jia X, Jiang S. SU-GG-T-26: An Accurate and Efficient Finite-Size Pencil Beam Based Dose Calculation Engine for Online Adaptive IMRT Replanning. Med Phys 2010. [DOI: 10.1118/1.3468412] [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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458
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Men C, Romeijn E, Jia X, Gu X, Jiang S. WE-B-BRA-01: GPU-Based Ultra Fast Direct Aperture Optimization in IMRT Treatment Planning. Med Phys 2010. [DOI: 10.1118/1.3469341] [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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459
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Tian Z, Xun J, Jiang S. TU-D-204B-04: 4DCT Reconstruction from Undersampled Projections Using Edge-Preserving Total Variation and Non Local Means. Med Phys 2010. [DOI: 10.1118/1.3469262] [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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460
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Li R, Jiang S. TU-D-204C-02: Machine Learning in Real-time Tumor Localization. Med Phys 2010. [DOI: 10.1118/1.3469269] [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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461
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Lewis J, Li R, Jia X, Watkins W, Song W, Jiang S. TU-D-204B-03: Lung CBCT Motion Deblurring Using Tumor Tracking in Rotational Cone-Beam Projections. Med Phys 2010. [DOI: 10.1118/1.3469261] [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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462
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Jia X, Lou Y, Li R, Lewis J, Gu X, Men C, Song W, Jiang S. TH-C-BRA-03: GPU-Based Cone Beam CT Reconstruction. Med Phys 2010. [DOI: 10.1118/1.3469482] [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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463
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Li R, Jia X, Lewis J, Gu X, Folkerts M, Men C, Jiang S. WE-C-204B-05: Real-Time Volumetric Image Reconstruction and 3D Tumor Localization Based on a Single X-Ray Projection Image during Lung Cancer Radiotherapy. Med Phys 2010. [DOI: 10.1118/1.3469377] [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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464
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Cerviño L, Du J, Jiang S. SU-GG-J-97: An MRI Study on the Use of External and Internal Surrogates for Lung Tumor Tracking. Med Phys 2010. [DOI: 10.1118/1.3468321] [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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465
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Men C, Romeijn E, Jia X, Gu X, Liang Y, Jiang S. SU-GG-T-110: A Novel Aperture-Based Algorithm for Fast Treatment Plan Optimization of Volumetric Modulated Arc Therapy (VMAT). Med Phys 2010. [DOI: 10.1118/1.3468499] [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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466
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Graf M, Scanderbeg D, Yashar C, Jiang S. SU-GG-T-37: Monte Carlo Dose Comparison Assessing Material Inhomogeneity Effects in Breast Brachytherapy. Med Phys 2010. [DOI: 10.1118/1.3468423] [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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467
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Jiang Y, Gu X, Men C, Jia X, Li R, Lewis J, Jiang S. TU-E-BRB-05: Real-Time Dose Reconstruction for Treatment Monitoring. Med Phys 2010. [DOI: 10.1118/1.3469288] [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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468
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Gu X, Nelson T, Men C, Jia X, Liang Y, Jiang S. TU-B-204B-03: Volumetric Ultrasound Guided Online Adaptive Partial Breast Irradiation. Med Phys 2010. [DOI: 10.1118/1.3469192] [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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469
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Jiang S, Jiang Z, Zhou G, Chen Z, Li D. Non-phytate phosphorus requirements and efficacy of a genetically engineered yeast phytase in male Lingnan Yellow broilers from 1 to 21 days of age. J Anim Physiol Anim Nutr (Berl) 2010; 95:47-55. [PMID: 20487103 DOI: 10.1111/j.1439-0396.2009.00981.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This experiment was conducted to investigate the requirement of non-phytate phosphorus (nPP) and efficacy of a genetically engineered yeast phytase in performance and tibia characteristics by male Lingnan Yellow broilers from 1 to 21 days of age. A total of 2640 1-day-old male chicks were randomly allotted to one of 11 dietary treatments, which consisted of six replicate floor pens with 40 birds per pen. All treatments had the same levels of all nutrients except for phosphorus and phytase. The control group (treatment 1) was fed the basal diet without dicalcium phosphate or phytase supplementation. Dietary concentrations of nPP were 0.11%, 0.19%, 0.27%, 0.35%, 0.43%, 0.51% and 0.59% respectively for treatments 1, 2, 3, 4, 5, 6 and 7, through addition of dicalcium phosphate (chemistry grade) to the basal diet. Diets 8-11 were supplemented with a genetically engineered yeast phytase 250, 500, 750 U/kg and a commercial phytase product 500 U/kg in basal diet respectively. The results showed that 0.46% and 0.51% nPP were required for maximum body-weight gain and optimum tibia development indicators respectively. However, 0.59% nPP had a negative effect on bird growth. The equivalency value of the genetically engineered yeast phytase was estimated to be 874 U/kg to liberate 0.1% nPP.
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470
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Jiang S, Yu Y, Venners SA, Zhang Y, Xing H, Wang X, Xu X. Effects of MTHFR and MS gene polymorphisms on baseline blood pressure and Benazepril effectiveness in Chinese hypertensive patients. J Hum Hypertens 2010; 25:172-7. [DOI: 10.1038/jhh.2010.50] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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471
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Sun L, Jiang S, Marciante JR. All-fiber optical magnetic-field sensor based on Faraday rotation in highly terbium-doped fiber. OPTICS EXPRESS 2010; 18:5407-5412. [PMID: 20389556 DOI: 10.1364/oe.18.005407] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
An all-fiber optical magnetic field sensor is demonstrated. It consists of a fiber Faraday rotator and a fiber polarizer. The fiber Faraday rotator uses a 2-cm-long section of 56-wt.%-terbium-doped silicate fiber with a Verdet constant of -24.5 rad/(Tm) at 1053 nm. The fiber polarizer is Corning SP1060 single-polarization fiber. The sensor has a sensitivity of 0.49 rad/T and can measure magnetic fields from 0.02 to 3.2 T.
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472
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Sun L, Jiang S, Zuegel JD, Marciante JR. All-fiber optical isolator based on Faraday rotation in highly terbium-doped fiber. OPTICS LETTERS 2010; 35:706-708. [PMID: 20195326 DOI: 10.1364/ol.35.000706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An all-fiber isolator with 17 dB optical isolation is demonstrated. The fiber Faraday rotator uses 56 wt. % terbium (Tb)-doped silicate fiber, and the fiber polarizers are Corning SP1060 single-polarization fiber. The effective Verdet constant of the Tb-doped fiber is measured to be -24.5+/-1.0 rad/(Tm) at 1053 nm, which is 20 times larger than silica fiber and 22% larger than previously reported results.
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473
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Fu Y, Li S, Zu Y, Yang G, Yang Z, Luo M, Jiang S, Wink M, Efferth T. Medicinal chemistry of paclitaxel and its analogues. Curr Med Chem 2010; 16:3966-85. [PMID: 19747129 DOI: 10.2174/092986709789352277] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Accepted: 07/29/2009] [Indexed: 12/13/2022]
Abstract
Paclitaxel belongs to the most successful anticancer drugs developed and utilised during the past two decades. Nevertheless, the development of resistance of tumor cells and severe side effects in the patients require further improvement of the drug. In this review, we provide a detailed overview of the state-of-the-art in the medicinal chemistry of paclitaxel and its analogues. A number of strategies have been explored to obtain sufficient amounts of paclitaxel for clinical use from natural resources. Semi-synthesis from its precursor, 10-deacetylbaccatin III, which can be extracted from Taxus leavesturned out as the most appropriate method for commercial production. So far, many paclitaxel derivatives have been synthesized, and their effect on microtubules stabilization and cytotoxicity were investigated in terms of structure-activity relationships (SAR). One of them, docetaxel, was approved as a more potent anticancer agent than paclitaxel towards a variety of tumor types. This review summarizes current possibilities to harvest sufficient amount of drugs from natural sources, including the production of taxanes in bioreactors and synthetic approaches for paclitaxel and its analogues, their mechanism of action and structure-activity relationships. In addition, future developments and perspectives for this class of compounds are outlined.
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474
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Su C, Picard P, Rathbone MP, Jiang S. Guanosine-induced decrease in side population of lung cancer cells: lack of correlation with ABCG2 expression. J BIOL REG HOMEOS AG 2010; 24:19-25. [PMID: 20385068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Cancers contain a 'side population' (SP), a subset of cells that is greatly enriched in stem cells and which contains malignant progenitors. SP cells are characterised by high efflux capability for Hoechst 33342 dye and for anti-cancer therapeutic agents through transporters; ABCG2 (ATP-binding cassette transporter G2) is currently most closely associated with the SP phenotype. Guanosine is an important intercellular signalling molecule; it stimulates stem cell proliferation in vivo and affects cholesterol efflux in vitro through activation of ABCG transporter (ABCG1), raising the possibility that it might also affect ABCG2 and hence the SP. We examined the effects of guanosine on the SP of A549 lung cancer cells. Fluorescence-activated cell sorting (FACS) revealed that exposure to 10 microM guanosine significantly decreased the proportion of SP cells after 48 hours but not after 6 hours. In contrast, Western blot analysis showed that 10 microM guanosine significantly decreased ABCG2 expression after 6 hours, but not after 48 hours. These data demonstrate that guanosine affects both the proportion of SP cells and ABCG2 transporters, but the lack of correlation between ABCG2 expression and the SP phenotype indicates that transporters other than ABCG2 are involved in maintaining the SP phenotype in A549 lung cancer cells.
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475
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Oesterreich S, Jiang S, Verdin E, Lee A, Malik S. Estrogen Receptor-Mediated Repression of Target Genes: Mechanism of Action, and Biological Significance. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-4136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Estrogen-bound estrogen receptor (ER) can regulate the transcription of a large number of genes. Although estrogen represses as many genes as it induces, induction has been studied in detail while the repression mechanisms remain largely unknown. In this study we characterized several estrogen-repressed ERα target genes that are directly repressed by estrogen in breast cancer cells. Interestingly, many repressed genes are tumor suppressor genes, playing critical roles in cell cycle inhibition and/or apoptosis. One gene that particularly piqued our interest is Reprimo (RPRM) because of its robust repression in a number of cell lines, and its role as a cell cycle inhibitor. Additionally, it is highly methylated in a variety of cancers including breast cancer and maps to a locus that displays loss of heterozygosity, suggesting that it may be a tumor suppressor gene. As a result, E2-mediated repression of this gene may be a crucial step in the progression of breast cancer. We did show that RPRM decrease (by siRNA) enhances estrogen-mediated S-phase entry, strongly suggesting a biological role of its repression. RPRM was actively and strongly repressed by estrogen and this repression was not due to a quicker turnover of the RPRM mRNA by estrogen. E2-mediated repression of RPRM levels did not require new protein synthesis since it is also repressed in the presence of the translation inhibitor, cycloheximide. We find that estrogen repression of RPRM requires a tripartite interplay between ERα, FoxA1, and HDAC7 as knockdown of these proteins abrogates its repression. Remarkably, silencing of HDAC7 significantly relieved repression of the majority of eleven estrogen-repressed genes tested. Further examination of the interplay between HDAC7 and ERα revealed that HDAC7 can interact with ERα and repress its transcriptional activity in a deacetylase-independent manner. Chromatin immunoprecipitation assays demonstrate that ERα, FoxA1, and HDAC7 are all recruited to a cis-regulatory enhancer (-4.8 kb) in the RPRM gene in the presence of estrogen, which was associated with a release of RNA Pol II from the proximal promoter. Repression requires FoxA1 to be recruited to an epigenetic signature characterized by H3K4 mono- and di-methylation. In summary, we have uncovered a unique requirement for a deacetylase-independent function of HDAC7 in estrogen repression of genes such as RPRM.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 4136.
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