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Li J, Wang L, Zhan Q, Liu Y, Fu B, Wang C. Sorghum bmr6 mutant analysis demonstrates that a shared MYB1 transcription factor binding site in the promoter links the expression of genes in related pathways. Funct Integr Genomics 2013; 13:445-53. [PMID: 24045932 DOI: 10.1007/s10142-013-0335-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 08/23/2013] [Accepted: 09/09/2013] [Indexed: 11/29/2022]
Abstract
Sorghum is not only an important cereal crop but also a biofuel crop. The sorghum brown midrib mutant 6 (bmr6) has a reduced lignin content in the cell walls and vascular tissues, which could potentially be advantageous for cellulosic biofuel production. Meanwhile, both dry matter yield and plant height were decreased in the bmr6 mutant. To identify genes affected in the mutant, differential gene expression analysis was performed for bmr6 and the wild type. As a result, a total of 1,052 differentially expressed genes were detected between the two samples, of which 166 genes were downregulated and 886 genes were upregulated. Five hundred seventy-nine of the 1,052 differentially expressed genes could be assigned to 154 documented pathways. These pathways mainly included primary and secondary metabolism. Therefore, mutation of the bmr6 gene, which impaired the biosynthesis of lignin, ultimately affected the expression of these genes associated with the growth and development of sorghum. Except for the bmr6 gene, 11 key enzyme genes of monolignols biosynthesis were upregulated. Promoter analysis identified that these genes have common MYB sites. It revealed that a feedback mechanism existed in the pathway and a MYB1 transcription factor (Sb02g031190) could associate with the upregulation of these genes in sorghum. In this study, we investigated gene expressions at a global level in sorghum bmr6 mutant and provided valuable insights into the mechanisms of lignin biosynthesis.
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Zhan Q, Zaninovic N, Malmsten J, Ye Z, Rosenwaks Z. Is time of blastomere realignment related to embryo quality and implantation: time-lapse study. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.1222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bodine R, Zhan Q, Park J, Jones S, Zaninovic N, Rosenwaks Z. Blastocyst vitrification versus slow freeze: a retrospective comparison of blastocyst survival, expansion and implantation rate. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.1431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hu Y, Zhou J, Fang L, Liu H, Zhan Q, Luo D, Zhou C, Chen J, Li Q, Xie P. Hippocampal synaptic dysregulation of exo/endocytosis-associated proteins induced in a chronic mild-stressed rat model. Neuroscience 2013; 230:1-12. [DOI: 10.1016/j.neuroscience.2012.08.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 08/04/2012] [Accepted: 08/14/2012] [Indexed: 10/28/2022]
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Song H, Song C, Wang H, Li C, Yang F, Lu SH, Lin C, Zhan Q, Wang X, Qian H. Suppression of hepatocarcinoma model in vitro and in vivo by ECRG2 delivery using adenoviral vector. Cancer Gene Ther 2012; 19:875-9. [PMID: 23079671 DOI: 10.1038/cgt.2012.77] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hepatocarcinoma represents one of the most malignant cancer types. Esophageal cancer-related gene 2 (ECRG2) is found to be critical in the process of carcinogenesis. It regulates urokinase-type plasmin activator receptor and extracellular matrix function and its polymorphism in exon 4 is associated with cancer relapse. To explore new strategies to fight against cancer, here we first systematically evaluated the therapeutic potential as a biological tool using adenoviral vector (Ad-ECRG2). Ad-ECRG2 is exogenously expressed in cytoplasm and is potent to suppress the growth of cancer cell by inducing apoptosis as effective as Ad-p53. Ad-ECRG2 is able to suppress the invasion and adhesion of cancer cells at low titers. It alters the expression of a panel of cancer-related molecules, including nuclear factor-kB, matrix metalloproteinase 2 and E-cadherin, contributing to reverse malignancy phenotype of cancer cells. In vivo experiments show a significant inhibition of cancer growth by intratumoral Ad-ECRG2 administration. No evident toxicity was observed in the model animal during the study. We concluded that ECRG2 is a potential molecular target in biological therapy strategies for cancer treatment.
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Zhan Q, Eldeiry W, Bae I, Alamo I, Kastan M, Vogelstein B, Fornace A. Similarity of the DNA-damage responsiveness and growth-suppressive properties of waf1/cip1 and gadd45. Int J Oncol 2012; 6:937-46. [PMID: 21556622 DOI: 10.3892/ijo.6.5.937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The cellular responses to genotoxic stress are complex involving both p53-dependent and independent mechanisms. In the case of the GADD genes, many stresses eliciting growth arrest have been shown to induce these genes in a coordinate fashion regardless of p53 status, while the ionizing radiation response (IR) of GADD45 has been found to be strictly p53-dependent. In the current study, the response of GADD45 was compared to the p53-regulated genes WAF1/CIP1 and MDM2 in a panel of human lines with known p53 status and also in mouse embryo fibroblasts where one or both alleles of p53 had been deleted. After IR, all 3 genes showed very similar transcriptional responses as measured by rapid increases in mRNA. in a p53-dependent manner. Like GADD45, the WAF1/CIP1 induction by IR can be enhanced by the radiosensitizer iododeoxyuridine, and provides further evidence that DNA strand breaks can act as a signal for activation of the p53 pathway. In addition, caffeine, which blocks IR cell-cycle checkpoint activation, reduced IR induction for both genes. Unlike the case for IR, only WAF1/CIP1 showed a consistent similarity to GADD45 to DNA base-damaging agents, where appreciable induction occurred in cells regardless of p53 status. The similarity between WAF1/CIP1 and GADD45 also extended to their growth suppressive properties, and a combination of expression vectors for these genes suppressed growth appreciably more than either alone. A reasonable interpretation of these results is that growth suppression after DNA damage by either p53-dependent or independent pathways is mediated by the combined action of multiple downstream effecters including WAF1/CIP1 and GADD45.
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Zhan Q, Yuan M, Wang XH, Duan XM, Yang QD, Xia J. Association of lipopolysaccharide-binding protein gene polymorphisms with cerebral infarction in a Chinese population. J Thromb Thrombolysis 2012; 34:260-8. [DOI: 10.1007/s11239-012-0701-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Feng C, Wang SG, Yang MY, Zhang E, Zhan Q, Jiang Y, Li BH, Yu GH. Tunable magnetic properties by interfacial manipulation of L1(0)-FePt perpendicular ultrathin film with island-like structures. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2012; 12:1089-1093. [PMID: 22629900 DOI: 10.1166/jnn.2012.4276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Based on interfacial manipulation of the MgO single crystal substrate and non-magnetic AIN compound, a L1(0)-FePt perpendicular ultrathin film with the structure of MgO/FePt-AIN/Ta was designed, prepared, and investigated. The film is comprised of L1(0)-FePt "magnetic islands," which exhibits a perpendicular magnetic anisotropy (PMA), tunable coercivity (Hc), and interparticle exchange coupling (IEC). The MgO substrate promotes PMA of the film because of interfacial control of the FePt lattice orientation. The AIN compound is doped to increase the difference of surface energy between FePt layer and MgO substrate and to suppress the growth of FePt grains, which takes control of island growth mode of FePt atoms. The AIN compound also acts as isolator of L1(0)-FePt islands to pin the sites of FePt domains, resulting in the tunability of Hc and IEC of the films.
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Jin L, Guan Q, Zhan Q. 3.135 CHANGES OF THE PKA/PP2A/CDK5/DARPP-32 PATHWAY IN 6-OHDA-LESIONED RATS FOLLOWING LONG-TERM TREATMENT WITH L-DOPA. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70851-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hu Y, Yang HG, Zhao WW, Zhan Q, Yuan XM. Study on the Hydrogen Isotope Permeation Behaviors of the FeAl/Al 2O 3 Composite Coating. FUSION SCIENCE AND TECHNOLOGY 2011. [DOI: 10.13182/fst11-a12724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yao S, Ceccarelli M, Zhan Q, Carbone G, Lu Z. Analysis and design of a modular underactuated mechanism for robotic fingers. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 2011. [DOI: 10.1177/0954406211412457] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This paper presents an analysis of the design problems and requirements for underactuated mechanisms for robotic fingers. The case of performing a grasping task is considered and a solution is proposed that consists of a series of linked underactuated mechanisms. Optimality criteria are analysed with the aim of formulating a general design algorithm based on a suitable optimization problem. An example of a four-phalanx modular finger is used to highlight the practical feasibility of the proposed modular design concepts and procedures.
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Zhan Q, Zaninovic N, Rosenwaks Z. Karyotypically normal human embryonic stem cells (HESC) derived from aneuploid preimplantation genetic diagnosis (PGD) embryos. Fertil Steril 2011. [DOI: 10.1016/j.fertnstert.2011.07.410] [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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Zhan Q, Huang S, Geng G, Xie Y. Comparison of relative potency of intrathecal bupivacaine for motor block in pregnant versus non-pregnant women. Int J Obstet Anesth 2011; 20:219-23. [DOI: 10.1016/j.ijoa.2011.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 12/27/2010] [Accepted: 01/08/2011] [Indexed: 10/18/2022]
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Zeng G, Murphy J, Zhan Q, Wang Y, Wang Y, Tsao J, McGowan T, MacPherson M. 1324 poster RAPID DOUBLE ARC REPLACES DYNAMIC IMRT IN PROSTATE BED AND STOMACH RADIATION THERAPY. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)71446-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Li J, Zhan Q. The role of centrosomal Nlp in the control of mitotic progression and tumourigenesis. Br J Cancer 2011; 104:1523-8. [PMID: 21505454 PMCID: PMC3101908 DOI: 10.1038/bjc.2011.130] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The human centrosomal ninein-like protein (Nlp) is a new member of the γ-tubulin complexes binding proteins (GTBPs) that is essential for proper execution of various mitotic events. The primary function of Nlp is to promote microtubule nucleation that contributes to centrosome maturation, spindle formation and chromosome segregation. Its subcellular localisation and protein stability are regulated by several crucial mitotic kinases, such as Plk1, Nek2, Cdc2 and Aurora B. Several lines of evidence have linked Nlp to human cancer. Deregulation of Nlp in cell models results in aberrant spindle, chromosomal missegregation and multinulei, and induces chromosomal instability and renders cells tumourigenic. Overexpression of Nlp induces anchorage-independent growth and immortalised primary cell transformation. In addition, we first demonstrate that the expression of Nlp is elevated primarily due to NLP gene amplification in human breast cancer and lung carcinoma. Consistently, transgenic mice overexpressing Nlp display spontaneous tumours in breast, ovary and testicle, and show rapid onset of radiation-induced lymphoma, indicating that Nlp is involved in tumourigenesis. This review summarises our current knowledge of physiological roles of Nlp, with an emphasis on its potentials in tumourigenesis.
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Zhang Y, Xiao J, Tong T, Jiang X, Yang W, Zhan Q. Successive Hypofractionated Radiation May be Superior to the Intermittent Hypofractionated Radiation: Animal Study and Microarray Analysis. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zaninovic N, Zhan Q, Rosenwaks Z. Efficiency of human embryonic stem cell derivation (hESC): optimization of the ICM isolation and culture conditions. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.032] [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]
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Seidel J, Martin LW, He Q, Zhan Q, Chu YH, Rother A, Hawkridge ME, Maksymovych P, Yu P, Gajek M, Balke N, Kalinin SV, Gemming S, Wang F, Catalan G, Scott JF, Spaldin NA, Orenstein J, Ramesh R. Conduction at domain walls in oxide multiferroics. NATURE MATERIALS 2009; 8:229-34. [PMID: 19169247 DOI: 10.1038/nmat2373] [Citation(s) in RCA: 392] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Accepted: 12/22/2008] [Indexed: 05/14/2023]
Abstract
Domain walls may play an important role in future electronic devices, given their small size as well as the fact that their location can be controlled. Here, we report the observation of room-temperature electronic conductivity at ferroelectric domain walls in the insulating multiferroic BiFeO(3). The origin and nature of the observed conductivity are probed using a combination of conductive atomic force microscopy, high-resolution transmission electron microscopy and first-principles density functional computations. Our analyses indicate that the conductivity correlates with structurally driven changes in both the electrostatic potential and the local electronic structure, which shows a decrease in the bandgap at the domain wall. Additionally, we demonstrate the potential for device applications of such conducting nanoscale features.
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Zhang X, Gao D, Hou G, Jin G, Deng Q, Kong X, Zhang D, Ling Y, Yu D, Gong Q, Zhan Q, Yao B, Lu Z. I-43 Assessment of specific antibodies to F protein in sera of Chinese hepatitis C patients treated with interferon plus ribavirin. Int J Infect Dis 2008. [DOI: 10.1016/s1201-9712(09)60046-1] [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] Open
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70
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Wang C, Cai P, Zhan Q, Mi Z, Huang Z, Chen G. Distribution of antiseptic-resistance genes qacA/B in clinical isolates of meticillin-resistant Staphylococcus aureus in China. J Hosp Infect 2008; 69:393-4. [DOI: 10.1016/j.jhin.2008.05.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Accepted: 05/15/2008] [Indexed: 11/15/2022]
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Wang C, Zhan Q, Mi Z, Huang Z, Chen G. Distribution of the antiseptic-resistance gene qacEDelta1 in 283 clinical isolates of Gram-negative bacteria in China. J Hosp Infect 2008; 69:394-6. [PMID: 18511148 DOI: 10.1016/j.jhin.2008.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Accepted: 04/01/2008] [Indexed: 10/22/2022]
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Ji J, Liu R, Tong T, Song Y, Jin S, Wu M, Zhan Q. Gadd45a regulates β-catenin distribution and maintains cell–cell adhesion/contact. Oncogene 2007; 26:6396-405. [PMID: 17452974 DOI: 10.1038/sj.onc.1210469] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Gadd45a, a growth arrest and DNA-damage gene, plays important roles in the control of cell cycle checkpoints, DNA repair and apoptosis. We show here that Gadd45a is involved in the control of cell contact inhibition and cell-cell adhesion. Gadd45a can serve as an adapter to enhance the interaction between beta-catenin and Caveolin-1, and in turn induces beta-catenin translocation to cell membrane for maintaining cell-cell adhesion/contact inhibition. This is coupled with reduction of beta-catenin in cytoplasm and nucleus following Gadd45a induction, which is reflected by the downregulation of cyclin D1, one of the beta-catenin targeted genes. Additionally, Gadd45a facilitates ultraviolet radiation-induced degradation of cytoplasmic and nuclear beta-catenin in a p53-dependent manner via activation of p38 kinase. These findings define a novel link that connects Gadd45a to cell-cell adhesion and cell contact inhibition, which might contribute to the role of Gadd45a in inhibiting tumorigenesis.
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Garner CE, Sumner SCJ, Davis JG, Burgess JP, Yueh Y, Demeter J, Zhan Q, Valentine J, Jeffcoat AR, Burka LT, Mathews JM. Metabolism and disposition of 1-bromopropane in rats and mice following inhalation or intravenous administration. Toxicol Appl Pharmacol 2006; 215:23-36. [PMID: 16513153 DOI: 10.1016/j.taap.2006.01.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2005] [Revised: 01/20/2006] [Accepted: 01/25/2006] [Indexed: 11/18/2022]
Abstract
Workplace exposure to 1-bromopropane (1-BrP) can potentially occur during its use in spray adhesives, fats, waxes, and resins. 1-BrP may be used to replace ozone depleting solvents, resulting in an increase in its annual production in the US, which currently exceeds 1 million pounds. The potential for human exposure to 1-BrP and the reports of adverse effects associated with potential occupational exposure to high levels of 1-BrP have increased the need for the development of biomarkers of exposure and an improved understanding of 1-BrP metabolism and disposition. In this study, the factors influencing the disposition and biotransformation of 1-BrP were examined in male F344 rats and B6C3F1 mice following inhalation exposure (800 ppm) or intravenous administration (5, 20, and 100 mg/kg). [1,2,3-(13)C]1-BrP and [1-(14)C]1-BrP were administered to enable characterization of urinary metabolites using NMR spectroscopy, LC-MS/MS, and HPLC coupled radiochromatography. Exhaled breath volatile organic chemicals (VOC), exhaled CO(2), urine, feces, and tissues were collected for up to 48 h post-administration for determination of radioactivity distribution. Rats and mice exhaled a majority of the administered dose as either VOC (40-72%) or (14)CO(2) (10-30%). For rats, but not mice, the percentage of the dose exhaled as VOC increased between the mid ( approximately 50%) and high ( approximately 71%) dose groups; while the percentage of the dose exhaled as (14)CO(2) decreased (19 to 10%). The molar ratio of exhaled (14)CO(2) to total released bromide, which decreased as dose increased, demonstrated that the proportion of 1-BrP metabolized via oxidation relative to pathways dependent on glutathione conjugation is inversely proportional to dose in the rat. [(14)C]1-BrP equivalents were recovered in urine (13-17%, rats; 14-23% mice), feces (<2%), or retained in the tissues and carcass (<6%) of rats and mice administered i.v. 5 to 100 mg/kg [(14)C]1-BrP. Metabolites characterized in urine of rats and mice include N-acetyl-S-propylcysteine, N-acetyl-3-(propylsulfinyl)alanine, N-acetyl-S-(2-hydroxypropyl)cysteine, 1-bromo-2-hydroxypropane-O-glucuronide, N-acetyl-S-(2-oxopropyl)cysteine, and N-acetyl-3-[(2-oxopropyl)sulfinyl]alanine. These metabolites may be formed following oxidation of 1-bromopropane to 1-bromo-2-propanol and bromoacetone and following subsequent glutathione conjugation with either of these compounds. Rats pretreated with 1-aminobenzotriazole (ABT), a potent inhibitor of P450 excreted less in urine (down 30%), exhaled as (14)CO2 (down 80%), or retained in liver (down 90%), with a concomitant increase in radioactivity expired as VOC (up 52%). Following ABT pretreatment, rat urinary metabolites were reduced in number from 10 to 1, N-acetyl-S-propylcysteine, which accounted for >90% of the total urinary radioactivity in ABT pretreated rats. Together, these data demonstrate a role for cytochrome P450 and glutathione in the dose-dependent metabolism and disposition of 1-BrP in the rat.
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Dreyer C, Le Tourneau C, Faivre S, Paradis V, Zhan Q, Degos F, Farges O, Hammel P, Ruszniewski P, Belghiti J, Raymond E. Impact of surgery and chemotherapy on survival in patients with advanced cholangiocarcinoma: A multivariate analysis in a cohort of 242 consecutive patients. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.4133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4133 Background: Cholangiocarcinoma remains an orphan disease for which prospective studies are missing to evaluate the impact of systemic chemotherapy on survival. Methods: Univariate and multivariate analysis of parameters that might impact survival were analyzed in a cohort of 242 consecutive patients with cholangiocarcinoma treated in a single institution between 2000 and 2004. Variables were WHO performance status (PS), age, symptoms, tumor size, extent of the disease, lymph node involvement, site of metastasis, tumor markers, pathology, and type of treatment including surgery, chemotherapy and radiotherapy. Results: Statistically significant prognostic factors of survival in univariate analysis are displayed in the table : In multivariate analysis, PS, tumor size and surgery were independent prognostic factors. Subgroup analysis demonstrated that in patients with advanced diseases (lymph node involvement, peritoneal carcinomatosis and/or distant metastasis), patients who had no surgery benefited of chemotherapy (median survival 13.1 versus 7.4 months in patients with/without chemotherapy, p = 0.006). Moreover, survival was further improved when patients could benefit of chemotherapy following total and/or partial resection (median survival 22.9 versus 13.0 months in patients with/without chemotherapy, p = 0.03). Conclusions: This study strongly suggests the positive impact on survival of multimodality approaches including surgery and chemotherapy in patients with advanced cholangiocarcinoma. [Table: see text] No significant financial relationships to disclose.
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Zavaliche F, Zheng H, Mohaddes-Ardabili L, Yang SY, Zhan Q, Shafer P, Reilly E, Chopdekar R, Jia Y, Wright P, Schlom DG, Suzuki Y, Ramesh R. Electric field-induced magnetization switching in epitaxial columnar nanostructures. NANO LETTERS 2005; 5:1793-6. [PMID: 16159226 DOI: 10.1021/nl051406i] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We present direct evidence for room-temperature magnetization reversal induced by an electric field in epitaxial ferroelectric BiFeO3-ferrimagnetic CoFe2O4 columnar nanostructures. Piezoelectric force microscopy and magnetic force microscopy were used to locally image the coupled piezoelectric-magnetic switching. Quantitative analyses give a perpendicular magnetoelectric susceptibility of approximately 1.0 x 10(-2) G cm/V. The observed effect is due to the strong elastic coupling between the two ferric constituents as the result of the three-dimensional heteroepitaxy.
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