401
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Chao M, Penagaricano J, Yan Y, Moros E, Gardner K, Corry P, Ratanatharathorn V. SU-GG-T-10: Deformable Model Based Dose Reconstruction for Total Body Irradiation with Helical TomoTherapy. Med Phys 2010. [DOI: 10.1118/1.3468395] [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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402
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Dou Y, Yan Y, Velasco C, Zhang X, Chao M, Han E, Moros E. SU-GG-T-299: A Digital QA Solution Using 2D Ion Chamber Array. Med Phys 2010. [DOI: 10.1118/1.3468694] [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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403
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404
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Zhang X, Velasco C, Yan Y, Corry P, Ratanatharathorn V, Moros E. SU-GG-T-294: Quality Assurance for Small SRS Photon Field Using LUCY Phantom on BrainLab Iplan. Med Phys 2010. [DOI: 10.1118/1.3468688] [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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405
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Moros E, Shafirstein G, Corry P, Chen D, Xia R, Chen X, Yan Y, Penagaricano J. WE-D-201C-04: SonoKnife - Feasibility of Line-Focused Ultrasound for Thermal Ablation. Med Phys 2010. [DOI: 10.1118/1.3469411] [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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406
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Han E, Zhang X, Velasco C, Yan Y, Moros E. SU-GG-T-534: The Impact of Linac Static Jaw Setting on Dose Output from Small Field SRS/SRT Using an Add-On Micro-Multileaf Collimator. Med Phys 2010. [DOI: 10.1118/1.3468931] [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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407
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Yan Y, Cao PT, Greer PM, Nagengast ES, Kolb RH, Mumby MC, Cowan KH. Protein phosphatase 2A has an essential role in the activation of gamma-irradiation-induced G2/M checkpoint response. Oncogene 2010; 29:4317-29. [PMID: 20498628 DOI: 10.1038/onc.2010.187] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
G2/M checkpoint activation after DNA damage results in G2/M cell cycle arrest that allows time for DNA repair before the entry of cells into mitosis. Activation of G2/M checkpoint involves a series of signaling events, which include activation of ataxia telangiectecia-mutated and Rad3-related (ATR) and Chk1 kinases and inhibition of Cdc2/Cyclin B activity. Studies presented in this report show that serine (Ser)/threonine (Thr) protein phosphatase 2A (PP2A) has an important role in G2/M checkpoint activation in response to gamma-irradiation (IR) exposure. Using PP2A inhibitors, as well as siRNA targeting various forms of Ser/Thr protein phosphatases, results presented in this report show that specific PP2A inhibition abrogates IR-induced activation of ATR and Chk1 kinases, as well as phosphorylation of Cdc2-Tyr15, and attenuates IR-induced G2/M arrest. These results suggest an important regulation of PP2A on IR-induced G2/M checkpoint signaling response.
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408
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Yan Y, Neville A, Dowson D, Williams S, Fisher J. Electrochemical Instrumentation of a Hip Simulator: A New Tool for Assessing the Role of Corrosion in Metal-On-Metal Hip Joints. Proc Inst Mech Eng H 2010; 224:1267-73. [DOI: 10.1243/09544119jeim771] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Polyethylene wear debris induced osteolysis has triggered investigations to find alternative material combinations to the well-established metal-on-polyethylene hip implants. Owing to some early successful clinical cases, metal-on-metal (MoM) hip replacements have been attracting more and more interest. There is, however, considerable concern about the propensity of MoM hip replacements to release metal ions and fine, nanometre-scale metallic wear debris. The long-term effect from released metal ions and wear particles is still not clear. To date, all the work on hip simulators focused on assessing mass losses damage has been referred to as ‘wear’. However, it is known in the field of tribocorrosion that mechanical removal of the passive layer on Co—Cr alloys can significantly enhance corrosion activity. In total joint replacements, it is possible that corrosion plays a significant role. However, no one has ever tried to extract, on a hip simulator, what proportion of the damage is due to mechanical processes and the corrosion processes. This paper describes the first instrumentation of an integrated hip joint simulator to provide in-situ electrochemical measurements in real time. The open circuit potential results are reported to assess the corrosion regime in the absence and presence of movement at the bearing surfaces. The importance of these measurements is that the real damage mechanisms can be assessed as a function of the operating cycle.
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409
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Dolly S, Wagner AJ, Bendell JC, Yan Y, Ware JA, Mazina KE, Holden SN, Derynck MK, De Bono JS, Burris HA. A first-in-human, phase l study to evaluate the dual PI3K/mTOR inhibitor GDC-0980 administered QD in patients with advanced solid tumors or non-Hodgkin's lymphoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.3079] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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410
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Baird RD, Kristeleit RS, Sarker D, Olmos D, Sandhu SK, Yan Y, Koeppen H, Levy GG, Jin J, De Bono JS. A phase I study evaluating the pharmacokinetics (PK) and pharmacodynamics (PD) of the oral pan-phosphoinositide-3 kinase (PI3K) inhibitor GDC-0941. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.2613] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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411
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Yan Y, Li J, Wu J, Xin Y, Aimi J, Xiang H, Bagri A, Brachmann RK, Chen DS, Hegde P. Pharmacodynamic biomarkers of anti-NRP1 activity in phase I, dose-escalating clinical trials as a single agent and combined with bevacizumab. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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412
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Du XM, Yan Y, Bai ZL, Zhang JP, Wang Z, Liu LL, Feng LJ. Evaluation of the cytotoxicity of a two photon absorbing fluorescence compound on human HepG2 cells and its application to tracking human hepatic cancer cells in mice. Biotech Histochem 2010. [DOI: 10.3109/10520290903149588] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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413
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Yan Y, Choi B, Morrison H, Wong T, Wu J. Quantitatively estimated the global burden of disease of chronic and infectious diseases interface in 2002. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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414
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Li Y, Xing QF, Yan Y, Zhou WL. A large quantity synthesis of ZnO nanoneedles and their polarity determination. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2010; 10:2023-2027. [PMID: 20355620 DOI: 10.1166/jnn.2010.2129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A large quantity of uniform ZnO nanoneedles has been synthesized by thermal evaporation method. Both single and double tip ZnO nanoneedles were found coexistence in the as-synthesized products. The single tip nanoneedles are major products in the synthesis and a few double tip nanoneedles were also observed. The polarity of the nanoneedles was characterized by convergent beam electron diffraction (CBED) and the simulation results reveal that the polarity of the ZnO (0001) surface directs the preferential growth of the nanoneedles. It is also found that most of the double tip nanoneedles are originated from the joint growth of two single tip nanoneedles with a kink in the middle and smooth ones might be generated from forming thin layer of cubic structures in the double nanoneedle tips. A large quantity of ZnO nanorod building blocks without tips was also achieved by fast cooling. The formation of the nanoneedles and nanorods can be attributed to different cooling speeds in our experiments. The sharp single nanoneedle tip can be potentially used as scanning probe microscope or field-emission tips.
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415
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Lin X, Lin A, Ni Z, Yao Q, Zhang W, Yan Y, Fang W, Gu A, Axelsson J, Qian J. Daily peritoneal ultrafiltration predicts patient and technique survival in anuric peritoneal dialysis patients. Nephrol Dial Transplant 2010; 25:2322-7. [DOI: 10.1093/ndt/gfq001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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416
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Qiao Y, Li B, Yang G, Yao H, Yang J, Liu D, Yan Y, Sigsgaard T, Yang X. Irritant and adjuvant effects of gaseous formaldehyde on the ovalbumin-induced hyperresponsiveness and inflammation in a rat model. Inhal Toxicol 2010; 21:1200-7. [PMID: 19827972 DOI: 10.3109/08958370902806159] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Formaldehyde (FA) is a common indoor air pollutant that can cause asthma in people experiencing long-term exposure. While FA and other man-made chemicals contribute to the stimulation of asthma in the general population, the underlying molecular pathogenesis of this relationship is not yet well understood. OBJECTIVE To explore FA as an irritant for the onset of asthma and as an adjuvant for the induction of allergy. METHODS In the present study, 40 Wistar rats in five experimental groups were exposed to: (i) saline; (ii) ovalbumin (OVA); (iii) OVA + FA at 417 ppb; (iv) OVA + FA at 2500 ppb; and (v) FA at 2500 ppb. Current and prior occupational exposure limits in China were established at 417 ppb and 2500 ppb, respectively. Gaseous FA was administrated to the animals for 6 h/day before and during OVA immunization or saline treatment. Measured outcomes included in situ lung function analysis, cytokine measurement, and histological changes in the rat lungs. RESULTS The airway reactivity, lung histological changes, pulmonary interleukin-4 secretion, and eosinophil infiltration in the OVA and FA exposed rats were significantly higher after gaseous FA exposures of 417 and 2500 ppb. While FA exposure alone did not induce significant structural changes to the airway, and the rate of inflammatory cell infiltration was the same as for the control group, pulmonary levels of interferon-gamma were significantly elevated in the exposed rats. CONCLUSIONS FA may be an irritant as well as serve as an adjuvant for the onset of asthma or asthma-like symptoms.
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417
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Yan Y, Yan Y, Skliris G, Skliris G, Penner C, Chooniedass-Kothari S, Chooniedass-Kothari S, Cooper C, Nugent Z, Fristenski A, Hamedani M, Blanchard A, Myal Y, Murphy L, Murphy L, Leygue E, Leygue E. Steroid Receptor RNA Activator Protein (SRAP): A Potential New Prognostic Marker for Estrogen Receptor-Positive/Node-Negative/Younger Breast Cancer Patients. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-2017] [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
Purpose: The steroid receptor RNA activator (SRA) is a functional RNA suspected to participate in the mechanisms underlying breast tumor progression. This RNA is also able to encode for a protein, SRAP, whose exact function remains to be determined. Our aim was to assess, in a large breast cancer cohort, whether levels of this protein could be associated with outcome or established clinical parameters.Experimental Design: Following antibody validation, we have assessed SRAP expression by tissue-microarray (TMA) analysis of 372 tumors with known steroid receptor and node status. Clinical follow-up was available for all the corresponding patients. Immunohistochemical scores were independently determined by two investigators and averaged. Statistical analyses were performed using standard univariate and multivariate tests.Results: SRAP levels were significantly (Mann-Whitney rank sum test, P<0.05) higher in estrogen receptor-alpha positive (ER+, n = 273), in progesterone receptor positive (PR+, n= 256) and in older patients (age ≥ 65 years, n = 183). When considering ER+ tumors, PR+ tumors, or young patients (< 65 years), patients with high SRAP expression had a significantly (Mantel-Cox test, P < 0.05) worse breast cancer specific survival (BCSS) than patients with low SRAP levels. SRAP also appeared as a very powerful indicator of poor prognostic for BCSS in the subset of ER+, node negative and young breast cancer patients (Cox regression analysis, n = 60, BCSS Hazard Ratio=13.937, P<0.0001).Conclusion: Our data suggest that SRAP might be a new predictor of breast cancer specific survival in younger breast cancer patients with ER+/node negative tumors.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 2017.
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418
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Zheng J, Zhang H, Chao Y, Xu Y, Peng B, Yan Y, Gao Q. UP-2.187: Long Follow-Up Study of Original Orthotopic Ileal Neobladder Reconstruction in 61 Patients with Bladder Cancer. Urology 2009. [DOI: 10.1016/j.urology.2009.07.406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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419
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Kristeleit R, Sarker D, Forster M, Lolkema M, Olmos D, Mazina K, Dolezal M, Ware J, Yan Y, de Bono J. 1204 A Phase I study evaluating the pharmacokinetics (PK) and pharmacodynamics (PD) of the oral pan-phosphoinositide-3 kinase (PI3K) inhibitor GDC-0941. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70416-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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420
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Landma J, Olweny E, Collyer W, Andreoni C, Carlin B, Yan Y, Clayman RV. Small Intestine Submucosa: Intrinsic and Anastomotic Tensile Strength of SIS Using Laser Welding, Fibrin Glue, -Vascular Closure Staples, Endo-GlA Staples and Sutures. MINIM INVASIV THER 2009. [DOI: 10.3109/13645700009093710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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421
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Du XM, Yan Y, Bai ZL, Zhang JP, Wang Z, Liu LL, Feng LJ. Evaluation of the cytotoxicity of a two photon absorbing fluorescence compound on human HepG2 cells and its application to tracking human hepatic cancer cells in mice. Biotech Histochem 2009; 85:107-13. [PMID: 19634065 DOI: 10.1080/10520290903149588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Small organic dyes have been applied widely in fluorescence imaging techniques for biomedical research. We investigated the cytotoxicity of a novel fluorescent dye, trans-4-(N-2-hydroxyethyl-N-ethyl amino)-4'-(dimethyl amino) stilbene (DMAHAS), on human hepatocellular carcinoma (HepG2) cells using methyl thiazolyl tetrazolium(MTT), a neutral red assay, a Coomassie brilliant blue assay, and flow cytometric analysis. Our results showed that DMAHAS had live cell permeability, stable cytosolic localization and no significant cytotoxicity to HepG2 cells. We explored its application further for tumor cell tracking in a human liver tumor xenograft mouse model. Tumor xenografts were examined by fluorescence imaging and conventional histological methods. In addition, a method based on DMAHAS release was developed for tumor-specific cytotoxicity analysis. Our study indicated that DMAHAS is a reliable probe for tumor tracking and fluorescence imaging.
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422
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Yin Y, Yan Y, Jiang X, Mai J, Chen NC, Wang H, Yang XF. Inflammasomes are differentially expressed in cardiovascular and other tissues. Int J Immunopathol Pharmacol 2009; 22:311-22. [PMID: 19505385 DOI: 10.1177/039463200902200208] [Citation(s) in RCA: 143] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
To determine the expression of components in Toll-like receptors (TLRs)/Nod-like receptors (NLRs)/inflammasome/caspase-1/interleukin (IL-1)-beta pathway, we examined the expression profiles of those genes by analyzing the data from expression sequence tag cDNA cloning and sequencing. We made several important findings: firstly, among 11 tissues examined, vascular tissues and heart express fewer types of TLRs and NLRs than immune and defense tissues including blood, lymph nodes, thymus and trachea; secondly, brain, lymph nodes and thymus do not express proinflammatory cytokines IL-1beta and IL-18 constitutively, suggesting that these two cytokines need to be upregulated in the tissues; and thirdly, based on the expression data of three characterized inflammasomes (NALP1, NALP3 and IPAF inflammasome), the examined tissues can be classified into three tiers: the first tier tissues including brain, placenta, blood and thymus express inflammasome(s) in constitutive status; the second tier tissues have inflammasome(s) in nearly-ready expression status (with the requirement of upregulation of one component); the third tier tissues, like heart and bone marrow, require upregulation of at least two components in order to assemble functional inflammasomes. Our original model of three-tier expression of inflammasomes would suggest a new concept of tissue inflammation privilege, and provides an insight to the differences among tissues in initiating acute inflammation in response to stimuli.
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423
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Yan Y, Dou Y, Penagaricano J, Ratanatharathorn V, Gardner K, Moros E, Corry P, Zhang X, Chao M, Mihaylov I. SU-FF-T-609: Dose Summation Technology for Radiation Therapy Facilities Equipped with Heterogeneous Planning and Delivery Systems. Med Phys 2009. [DOI: 10.1118/1.3182107] [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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424
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Yan Y, Zeng GL. A Postprocessing Method for Compensation of Scatter and Collimator Blurring in SPECT: A Proof-of-Concept Study. J Nucl Med Technol 2009; 37:83-90. [DOI: 10.2967/jnmt.108.061135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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425
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Zhang X, Penagaricano J, Boyd K, Yan Y, Corry P, Ratanatharathorn V, Moros E. SU-FF-T-208: Dose Verification for Total Marrow Irradiation Using HELICAL TOMOTHERAPY Planned Adaptive. Med Phys 2009. [DOI: 10.1118/1.3181683] [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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