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Leonard SM, Wei W, Collins SI, Pereira M, Diyaf A, Constandinou-Williams C, Young LS, Roberts S, Woodman CB. Oncogenic human papillomavirus imposes an instructive pattern of DNA methylation changes which parallel the natural history of cervical HPV infection in young women. Carcinogenesis 2012; 33:1286-93. [DOI: 10.1093/carcin/bgs157] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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252
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Kamal AH, Camacho F, Anderson R, Wei W, Balkrishnan R, Kimmick G. Similar survival with single-agent capecitabine or taxane in first-line therapy for metastatic breast cancer. Breast Cancer Res Treat 2012; 134:371-8. [PMID: 22460617 DOI: 10.1007/s10549-012-2037-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Accepted: 03/15/2012] [Indexed: 10/28/2022]
Abstract
Capecitabine is often offered as a first-line chemotherapy option for metastatic breast cancer (MBC). In this study, we compare characteristics of and survival among women prescribed first-line capecitabine or taxane monotherapy for MBC. Women receiving first-line chemotherapy for MBC from 1998 to 2005 were identified from the North Carolina tumor registry linked with Medicaid and Medicare claims records, and were followed through the end of 2005 with survival data from the National Death Index. T Tests and Chi-square tests were used to compare baseline characteristics. Overall survival and cancer-specific survival were examined using Cox proportional hazard modeling. There were 257 patients with MBC starting first-line chemotherapy with capecitabine (n=71) or a taxane (n=186). No differences in age, race, or Charlson comorbidity status were observed between groups. Hormone receptor negative tumors (31.0 vs. 17.7%, p=0.02) and patients insured by Medicaid (28 vs. 12%, p=0.002) were more prevalent in the capecitabine group. Time from metastasis to first-line chemotherapy was longer in the capecitabine group (52 vs. 26% began after 3 months, p<0.001). In multivariate analysis, treatment received was not associated with overall or cancer-specific survival. Among standard demographics, age was the only factor significantly associated with overall survival (HR 1.02, p=04). In this population-based study, women who received capecitabine as first-line treatment for MBC were more often hormone receptor negative and insured by Medicaid. In multivariate analysis, first-line capecitabine and taxane for MBC yielded similar overall and cancer-specific survival outcomes.
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253
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Wei W, Li DF, Pan XH, Liu SQ. Electrochemiluminescent detection of mucin 1 protein and MCF-7 cancer cells based on the resonance energy transfer. Analyst 2012; 137:2101-6. [PMID: 22421993 DOI: 10.1039/c2an35059a] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel sensing strategy for sensitive detection of mucin 1 protein (MUC1) and MCF-7 cells based on electrochemiluminescence (ECL) resonance energy transfer (ERET) from bis(2,2'-bipyridine)-(5-aminophenanthroline)ruthenium(II) (Ru1) to graphene oxide (GO) was proposed. The MUC1 aptamer was covalently combined with Ru1 (Ru1-aptamer) using aqueous carbodiimide coupling chemistry. Due to the strong noncovalent interaction between the Ru1-aptamer and GO, the ECL of Ru1 was efficiently quenched because of the ERET. In the presence of a target MUC1 protein, the binding between the Ru1-aptamer and MUC1 disturbed the interaction between the Ru1-aptamer and GO. These interactions led to the release of the Ru1-aptamer from GO, and resulted in the restoration of Ru1 ECL. This was shown to detect MUC1 protein sensitively in a linear range from 64.9 to 1036.8 nM with a detection limit of 40 nM. With further application in the detection of MCF-7 cells, the presented method could respond at concentrations as low as 30 cancer cells per mL. By substituting the aptamer and the corresponding target, this method could be conveniently extended for the sensitive detection of other biomolecules.
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254
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Wang Y, Wei W. Microglia-like or microglia: results of the weak silver carbonate staining method of del Rio-Hortega. Biotech Histochem 2012; 87:346-9. [PMID: 22404562 DOI: 10.3109/10520295.2012.661461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We investigated the character and origin of the newly described "microglia-like" cell in the mammalian organ of Corti after aminoglycoside intoxication. We replicated the neomycin-induced ototoxicity model in cochleae of neonatal Sprague-Dawley rats and used their brains as microglia positive controls. The weak silver carbonate staining method of del Rio-Hortega was used to identify the microglia-like cell. The microglia-like cell was confirmed by transmission electron microscope (TEM). Microglia in the brain were stained while rat microglia-like cells in the cochlea were unstained by the weak silver carbonate staining method of del Rio-Hortega. Because the microglia-like cell was unstained by the method of del Rio-Hortega, it is unlikely that the newly found cell is related to microglia.
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Chandler A, Wei W, Anderson EF, Herron DH, Ye Z, Ng CS. Validation of motion correction techniques for liver CT perfusion studies. Br J Radiol 2012; 85:e514-22. [PMID: 22374283 DOI: 10.1259/bjr/31999821] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES Motion in images potentially compromises the evaluation of temporally acquired CT perfusion (CTp) data; image registration should mitigate this, but first requires validation. Our objective was to compare the relative performance of manual, rigid and non-rigid registration techniques to correct anatomical misalignment in acquired liver CTp data sets. METHODS 17 data sets in patients with liver tumours who had undergone a CTp protocol were evaluated. Each data set consisted of a cine acquisition during a breath-hold (Phase 1), followed by six further sets of cine scans (each containing 11 images) acquired during free breathing (Phase 2). Phase 2 images were registered to a reference image from Phase 1 cine using two semi-automated intensity-based registration techniques (rigid and non-rigid) and a manual technique (the only option available in the relevant vendor CTp software). The performance of each technique to align liver anatomy was assessed by four observers, independently and blindly, on two separate occasions, using a semi-quantitative visual validation study (employing a six-point score). The registration techniques were statistically compared using an ordinal probit regression model. RESULTS 306 registrations (2448 observer scores) were evaluated. The three registration techniques were significantly different from each other (p=0.03). On pairwise comparison, the semi-automated techniques were significantly superior to the manual technique, with non-rigid significantly superior to rigid (p<0.0001), which in turn was significantly superior to manual registration (p=0.04). CONCLUSION Semi-automated registration techniques achieved superior alignment of liver anatomy compared with the manual technique. We hope this will translate into more reliable CTp analyses.
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Landsman-Blumberg P, Wei W, Douglas D, Smith D, Camargo C. A Retrospective Database Study of US Children in the Emergency Department or Hospital with Food-induced Anaphylaxis: Concordance with Recommended Post-Discharge Care. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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257
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Wei W, Zhang M, Tweardy D, Rosen J, Lewis M. PD08-05: Stat3 Signaling in Human Breast Cancer Stem Cells. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-pd08-05] [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
Recent data suggest the existence of a unique subset of breast cancer cells capable of initiating tumor growth and giving rise to all other cells characteristic of a given tumor. These cells have been termed “cancer stem cells” or “tumor-initiating cells”. Breast cancer stem cells appear to be resistant to chemo- and radiotherapies and may be responsible for recurrence and metastasis in breast cancer patients. Identifying the cellular signaling pathways responsible for breast cancer stem cell maintenance and self-renewal represents a critical hurdle for developing effective therapeutics. The Stat3 pathway is a critical regulator of the function of normal stem cells, and shows altered expression in human breast cancers [4]. Moreover, IL-6, the Stat3 signaling agonist, is required for breast cancer stem cell function in human breast cancer cell lines. All these suggest an important role of Stat3 signaling in breast cancer stem cells. However, due to lack of method for pathway-activity-based live cell separation, whether Stat3 functions in the cancer stem cells themselves or whether it may function in surrounding niche cells remain unknown. We have constructed a lentiviral fluorescent reporter for Stat3 signaling which contains four copies of M67 Stat3 binding sites upstream of enhanced Green Fluorescent Protein. This reporter system enables FACS-sorting of cells with active Stat3 signaling and in vivo/in situ localization of Stat3 responsive cells. In addition, C188-9, the first Stat3 specific competitive inhibitor, has been developed in our collaborator's lab, which provides us an advanced tool in studying Stat3 function.
We hypothesize that Stat3 signaling is preferentially active in stemlike subpopulation and depend on non-stem cancer cells to maintain its activation. Three aims to test this hypothesis include: 1. To test whether cancer cells with activated Stat3 signaling are enriched for breast cancer stem cells or whether they may serve as niche cells. 2. To test whether small molecule antagonists of Stat3 signaling can inhibit cancer stem cell function. 3. To identify novel targets of Stat3 signaling that may serve as indicators of responsiveness to Stat3 antagonist or predict treatment response.
So far, our GFP reporters for Stat3 signaling effectively report Stat3 activity in both patient xenografts and human breast cancer cell lines in vivo and in vitro, which enables effective separation of Stat3+/Stat3- cells for functional Study. MDA231 and SUM159 tumors with reporters have been established. Tumor cells will be sorted according to Stat3 activity and perform limiting dilution and MSFE assays. Tumors with reporters will also be treated by C188-9, Chemo, or in combination to study synergistic effect of Stat3 inhibitors on tumor growth. Preliminary data based on inhibitor and limiting dilution studies suggested that Stat3 signaling is required for stem cell function. However, neither Stat3+ nor Stat3- cells are self-sufficient in performing these functions, indicating communications between subpopulations.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr PD08-05.
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You Q, Jiang C, Wu Y, Yu X, Chen Y, Zhang X, Wei W, Wang Y, Tang Z, Jiang D, Wu Y, Wang C, Meng X, Zhao X, Kong W. Subcutaneous Administration of Modified Vaccinia Virus Ankara Expressing an Ag85B-ESAT6 Fusion Protein, but Not an Adenovirus-Based Vaccine, Protects Mice Against Intravenous Challenge with Mycobacterium tuberculosis. Scand J Immunol 2011; 75:77-84. [DOI: 10.1111/j.1365-3083.2011.02629.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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259
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Le T, Yi SH, Zhao ZW, Wei W. Rapid and sensitive enzyme-linked immunosorbent assay and immunochromatographic assay for the detection of chlortetracycline residues in edible animal tissues. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 28:1516-23. [DOI: 10.1080/19440049.2011.589037] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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260
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Wei W, Guo FB. Prediction of genomic islands in seven human pathogens using the Z-Island method. GENETICS AND MOLECULAR RESEARCH 2011; 10:2307-15. [PMID: 22002124 DOI: 10.4238/2011.october.5.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We adopted the method of Zhang and Zhang (the Z-Island method) to identify genomic islands in seven human pathogens, analyzing their chromosomal DNA sequences. The Z-Island method is a theoretical method for predicting genomic islands in bacterial genomes; it consists of determination of the cumulative GC profile and computation of codon usage bias. Thirty-one genomic islands were found in seven pathogens using this method. Further analysis demonstrated that most have the known conserved features; this increases the probability that they are real genomic islands. Eleven genomic islands were found to code for products involved in causing disease (virulence factors) or in resistance to antibiotics (resistance factors). This finding could be useful for research on the pathogenicity of these bacteria and helpful in the treatment of the diseases that they cause. In a comparison of the distribution of mobility elements in genomic islands predicted by different methods, the Z-Island method gave lower false-positive rates. The Z-Island method was found to detect more known genomic islands than the two methods that we compared it with, SIGI-HMM and IslandPick. Furthermore, it maintained a better balance between specificity and sensitivity. The only inconvenience is that the steps for finding genomic islands by the Z-Island method are semi-automatic.
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261
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Ying W, Jing L, Miao W, Jiayi S, Wei W, Dong Z. The prevalence of percutaneous coronary intervention in Beijing residents with coronary heart disease, 2007-2009. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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262
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Wei W, Jianbin L, Yingjie Z, Min X, Tingyong F, Qian S, Fengxiang L, Suzhen W. Comparison of the Patient-specific Internal Gross Tumor Volume for Primary Esophageal Cancer Based Separately on Three-dimensional and Four-dimensional CT Simulation Images. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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263
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Wei W, Dong Z, Jing L, Jiayi S, Miao W, Jun L, Yue Q. Association of fasting triglyceride levels and 15-year changes with diabetes risk in the Chinese multi-provincial cohort study. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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264
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Suzhen W, Jianbin L, Yingjie Z, Wei W, Qian S, Tingyong F, Min X. A Study on Intrafraction Displacement of Mediastinal Metastatic Lymph Nodes for Non-small Cell Lung Cancer Based on Four-dimensional Computed Tomography. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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265
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Jiayi S, Jing L, Wei W, Xueqin X, Zaihua W, Miao W, Yue Q, Jun L, Xiuying Z, Dong Z. A survey investigation on the incidence of acute coronary events in the registered permanent residents of Beijing (2007-2009). BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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266
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Xiu-Ying Z, Dong Z, Xue-Qin X, Zai-Hua W, Wei W, Jia-Yi S, Miao W, Jun L, Yue Q, Mo-Ning G, Jian-Peng Z, Jing L. Trends in hospitalisation rates for coronary heart disease in Beijing, 2007-2009. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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267
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Jun L, Dong Z, Hongjuan L, Yue Q, Jing L, Wei W. Survey of dysglycemia in outpatients with hypertension across China-a national multicenter observational study. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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268
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Miao W, Jing L, Xueqin X, Zaihua W, Wei W, Jiayi S, Jun L, Yue Q, Moning G, Jianpeng Z, Xiuying Z, Dong Z. Study on the time distribution of admission for acute myocardial infarction in Beijing from 2007 to 2009. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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269
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Wei W, Qing W. Associations between plasma NT-proBNP and the number of echocardiographic abnormalities in geriatric inpatients. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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270
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Wei W, Jianbin L, Suzhen W, Min X, Yingjie Z, Tingyong F, Qian S, Fengxiang L, Dongping S. Analysis of Whole Breast Displacement Relative to Selected Skin Markers and Surgical Clips using Four-dimensional Computed Tomography. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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271
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Yan L, Jing L, Wei W, Miao W, Jiayi S, Dong Z. The association between visit-to-visit blood pressure variability and subclinical carotid atherosclerosis. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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272
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Zhang J, Xiao Y, Guo Y, Breslin P, Zhang S, Wei W, Zhang Z, Zhang J. Differential requirements for c-Myc in chronic hematopoietic hyperplasia and acute hematopoietic malignancies in Pten-null mice. Leukemia 2011; 25:1857-68. [PMID: 21926961 DOI: 10.1038/leu.2011.220] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Myeloproliferative disorders (MPDs), lymphoproliferative disorders (LPDs), acute T-lymphocytic or myeloid leukemia and T-lymphocytic lymphoma were developed in inducible Pten (phosphatase and tensin homolog, deleted on chromosome ten)-knockout mice (Pten(-/-)). The appearance of these multiple diseases in one animal model provides an opportunity to study the pathogenesis of multiple diseases simultaneously. To study whether Myc function is required for the development of these hematopoietic disorders in Pten(-/-) mice, we generated inducible Pten/Myc double-knockout mice (Pten(-/-)/Myc(-/-)). By comparing the hematopoietic phenotypes of these double-knockout mice with those of Pten(-/-) mice, we found that both sets of animals developed MPDs and LPDs. However, none of the compound-mutant mice developed acute leukemia or lymphoma. Interestingly, in contrast to the MPDs that developed in Pten(-/-) mice, which are dominated by granulocytes, megakaryocytes predominate in the MPDs of Pten(-/-)/Myc(-/-) mice. Our study suggests that the deregulation of phosphoinositide 3-kinase/Akt signaling in Pten(-/-) hematopoietic cells protects these cells from apoptotic cell death, resulting in chronic proliferative disorders. However, owing to the differential requirement for Myc in granulocyte as compared to megakaryocyte proliferation, Myc deletion converts Pten(-/-) MPDs from granulocyte- to megakaryocyte-dominated conditions. Myc is absolutely required for the development of acute hematopoietic malignancies.
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Wei W, Li J, Zhang Y, Xu M, Fan T, Shao Q, Shang D, Li F, Wang S. 2028 POSTER A Study on Correlation Between Target Displacement and Volume Variation of Primary Carcinoma in the Middle and Distal Oesophagus During Normal Respiration Based on Four-dimensional CT. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)70986-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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274
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Wang ZZ, Li WJ, Wang BQ, Zhang BT, Xing JZ, Jing XG, Dang BR, Wei W, Zhao WX. Cytogenetic effects induced by accelerated carbon ions with shielding. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2011; 50:383-387. [PMID: 21656249 DOI: 10.1007/s00411-011-0372-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 05/23/2011] [Indexed: 05/30/2023]
Abstract
Our work aims to understand the effects of shielding on the induction of biological damage by heavy charged particles and to compare the shielding effects of different materials at the same LET from two aspects: the biological effectiveness including or not including secondary particles emitted at large angles and the biological effectiveness at different angles with respect to the beam direction. We designed and conducted biological experiments to determine the biological effectiveness of 200 MeV/u carbon ions after traversing different shielding materials (Lucite and aluminium). Whole blood samples, which were either attached to the shielding material (48 mm Lucite or 29 mm aluminium)or positioned at 300 cm away from it at different angles with respect to the beam axis, were exposed to carbon ion beams. For comparison, whole blood samples were exposed directly to 200 MeV/u carbon ions. Chromosomal aberrations in lymphocytes were scored. The results indicated that the biological effectiveness per unit dose was not significantly changed by 48 mm Lucite or 29 mm aluminium, and no significant differences were observed in lymphocytes attached to the target and in lymphocytes positioned at a distance of 300 cm away from the target, at 0º angle of the beam axis. However, when plotted as a function of the number of ions hitting the shielding target, the curves are separated and the shield increases the effectiveness per unit ion. The frequency of chromosomal aberrations at tilted angles behind 29 mm Al and 48 mm Lucite was almost the same. These lesions were considered to be caused by secondary particles due to the passage of particles through the shielding materials.
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Xie L, Wei W, Henk HJ, Baser O. Risk of recurrence and economic burden of early-stage, triple-negative breast cancer in a U.S.-managed care setting. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11563] [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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