801
|
Mao C, Liao RY, Chen Q. Sensitivity analyses including and excluding the HWE-violating studies are required for meta-analyses of genetic association studies. Breast Cancer Res Treat 2009; 121:245-6. [DOI: 10.1007/s10549-009-0605-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Accepted: 10/14/2009] [Indexed: 10/20/2022]
|
802
|
Xue W, Pan J, Chen H, Chen Q, Chen Y, Sun J, Xia L, Huang Y. UP-1.019: A New Visualized Puncture System for the PNL Procedure-Initial Experience from Renji Hospital. Urology 2009. [DOI: 10.1016/j.urology.2009.07.466] [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]
|
803
|
Fu B, Wang G, Sun T, Cui S, Cao R, Feng L, Xi H, Chen Q, Xiong J. MP-05.12: Three-Stage Training Model for Laparoscopic Nephron-Sparing Nephrectomy. Urology 2009. [DOI: 10.1016/j.urology.2009.07.1015] [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]
|
804
|
Fu B, Wang G, Cui S, Sun T, Cao R, Feng L, Sun X, Chen J, Xi H, Chen Q, Zhong K, Kuang R. MP-04.05: Extraperitoneal Laparoscopic Surgery for the Treatment of Lower Ureteral Disease. Urology 2009. [DOI: 10.1016/j.urology.2009.07.1027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
805
|
Fu B, Wang G, Sun T, Cao R, Cui S, Feng L, Sun X, Xi H, Chen J, Chen Q. MP-04.03: Anatomical Retroperitoneoscopic Adrenalectomy: Initial Experience in 60 Cases. Urology 2009. [DOI: 10.1016/j.urology.2009.07.1025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
806
|
Fu B, Wang G, Cui S, Sun T, Cao R, Feng L, Kuang R, Xi H, Chen Q, Zhong Z, Sun X, Chen J, Xiong L, Wang D, Xie P, Liu T. UP-1.023: Retroperitoneal Laparoscopic Surgery for the Treatment of Large Adrenal Tumors. Urology 2009. [DOI: 10.1016/j.urology.2009.07.470] [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]
|
807
|
Wang Y, Wang C, Hou Y, Lu Z, Wang X, Lu J, Jiang F, Zhang H, Chen Q, Wang Y. UP-1.015: Posterior Laparoscopic Compared with Open Resection of Pheochromocytoma: A Review of 49 Cases. Urology 2009. [DOI: 10.1016/j.urology.2009.07.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
808
|
Xue W, Chen H, Pan J, Chen Q, Chen Y, Huang Y. UP-1.034: The Application of Flexible Ureteroscope in the Treatment of Ureterointestinal Anastomotic Stricture of Studer Neobladder. Urology 2009. [DOI: 10.1016/j.urology.2009.07.481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
809
|
Xue W, Pan J, Chen H, Chen Q, Chen Y, Sun J, Huang Y. UP-1.035: Surgical Strategy for Iatrogenic Ureteral Trauma Complicating Upper Tract Obstruction. Urology 2009. [DOI: 10.1016/j.urology.2009.07.482] [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]
|
810
|
Ma L, Wang W, Cai Z, Da J, Chen Q, Zhou J. UP-3.059: Transurethral Prostatectomy with the Bipolar Plasmakinetic Technique for Benign Prostate Hyperplasia in High Risk Patients. Urology 2009. [DOI: 10.1016/j.urology.2009.07.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
811
|
Chen X, Chen Q, Wang Z. UP-3.077: The Improvement of the Operative Technique in TUEB. Urology 2009. [DOI: 10.1016/j.urology.2009.07.081] [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]
|
812
|
Chen Q, Song JM, Pan F, Xia FL, Yuan JY. The kinetics of photocatalytic degradation of aliphatic carboxylic acids in an UV/TiO2 suspension system. ENVIRONMENTAL TECHNOLOGY 2009; 30:1103-1109. [PMID: 19947142 DOI: 10.1080/09593330902988711] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Kinetic studies on the photocatalytic degradation of aliphatic carboxylic acids were carried out in a slurry photoreactor with in-situ monitoring, employing artificial UV light as the source of energy and nano-TiO2 powder as the catalyst. The influences on the photocatalytic degradation such as the initial concentration of reactant (C0), catalyst dosage (CTiO2), UV intensity (Ia) and pH value have been investigated. Good agreement has been obtained between the value calculated by Langmuir-Freundlich-Hinshelwood (L-F-H) model and experimental data, with coefficient of multiple determination (R2) varying from 0.880 to 0.999. The L-F-H model has been proven to be feasible in describing the kinetic characteristic of the photocatalytic degradation of aliphatic carboxylic acids. Moreover, the apparent reaction rate constant (k) of the photocatalytic degradation of dicarboxylic acids is higher than that of monocarboxylic acids with the same carbon atoms. This shows that the photocatalytic degradation rate is favoured by different chemical structure.
Collapse
|
813
|
Xue W, Pan J, Chen H, Chen Q, Chen Y, Sun J, Cao M, Huang Y. UP-3.071: Goserelin Acetate Combined PKRP for the Treatment of Benign Prostatic Hyperplasia in Patients with High Surgical Risk. Urology 2009. [DOI: 10.1016/j.urology.2009.07.075] [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]
|
814
|
Li M, Miao ZH, Chen Z, Chen Q, Gui M, Lin LP, Sun P, Yi YH, Ding J. Echinoside A, a new marine-derived anticancer saponin, targets topoisomerase2alpha by unique interference with its DNA binding and catalytic cycle. Ann Oncol 2009; 21:597-607. [PMID: 19773249 DOI: 10.1093/annonc/mdp335] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Echinoside A was isolated from sea cucumber. This study demonstrates its anticancer effects and its mechanisms of action. MATERIALS AND METHODS Anticancer effects of echinoside A were evaluated in vitro and in vivo. TUNEL and DNA fragmentation assays were applied to examine its ability to induce apoptosis. A series of biochemical assays were applied to investigate the inhibition of echinoside A on topoisomerase2alpha (Top2alpha). Molecular docking analyses were used to demonstrate the direct interaction between echinoside A and Top2alpha. RESULTS Echinoside A inhibited the growth of tumors in mouse models and human prostate carcinoma xenografts in nude mouse models. Echinoside A shows the unique characteristics of inhibiting the noncovalent binding of Top2alpha to DNA by competing with DNA for the DNA-binding domain of the enzyme and of interfering predominantly with the Top2alpha-mediated prestrand passage cleavage/religation equilibrium over with the poststrand passage one. These features distinguish echinoside A from other known Top2alpha inhibitors. As a result, echinoside A induced DNA double-strand breaks in a Top2-dependent manner. CONCLUSION Echinoside A targets Top2alpha by unique interference with the binding of Top2 to DNA and by imparing the Top2-mediated DNA cleavage and religation, exerting potent in vitro and in vivo antitumor activities.
Collapse
|
815
|
Chen Q, Cao M, Xiang WL, Sun Q, Zhang J, Hou RT, Yan ZY, Yang ZR, Liu J, Zhao J. Study on genes with altered expression in alpha-amanitin poisoned mice and evaluation on antagonistic effects of traditional Chinese medicines against toxicity of alpha-amanitin. ACTA BIOLOGICA HUNGARICA 2009; 60:281-91. [PMID: 19700387 DOI: 10.1556/abiol.60.2009.3.5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The forward and reverse cDNA subtractive libraries before and after the toxic effect of alpha-amanitin were constructed by suppression subtractive hybridization and randomly selected clones from each subtractive library were screened by PCR and dot blot hybridization. A total of 85 genes with altered expression were finally identified, with 41 genes from the forward library and 44 from the reverse library. Subsequently, the antagonistic effects of candidate traditional Chinese medicines were evaluated based on the genetic transcription levels of the genes with significant altered expression, including Catnbeta, Flt3-L, IL-7r and Rpo2-4. The results indicated that Silybum marianum (L.) Gaert and Ganoderma lucidum had significant down-regulated effects on the transcription level of Catnbeta that was up-regulated by alpha-amanitin, and the two herbs also up-regulated the transcription levels of Flt3-L and Rpo2-4. Silybum marianum (L.) had significant up-regulated effects on the IL-7r that was down-regulated by alpha-amanitin. These preliminary studies suggested that Silybum marianum (L.) and Ganoderma lucidum were effective antagonists against the toxicity of alpha-amanitin.
Collapse
|
816
|
Chen Q, Li DY, Shitaka Y, Oiwa K. Behaviors of microtubules (MTs) driven by biological motors (dynein c) at collisions against micro-fabricated tracks and mts for potential nano-bio-machines. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2009; 9:5123-5133. [PMID: 19928190 DOI: 10.1166/jnn.2009.1204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In vitro motility assays, where protein motors (attached to a surface) move protein filaments, have been used for investigating protein motors' functions. In recent decades, these assays are extended to explore potential applications of motor proteins as biological motors in nano-bio-machine development. Recent attempts include fabricating micrometer-scale tracks on the surface to confine and guide the flow of bio-filaments as a power transfer medium driven by the motor proteins. Understanding the interaction between bio-filaments and fabricated tracks as well as the mutual interaction between bio-filaments is of importance to the design of potential nano-bio-machines. In this study, we investigate the behaviors of a microtubule driven by axonemal dynein at the collision against another microtubule and micro-fabricated walls, respectively. Based on experimental observations, we propose a model to study possible mechanisms for the microtubule-microtubule and microtubule-wall interactions, which involve bumping force, bending moment and torque generation.
Collapse
|
817
|
Wu C, Wang S, Wang F, Chen Q, Peng S, Zhang Y, Qian J, Jin J, Xu H. Increased frequencies of T helper type 17 cells in the peripheral blood of patients with acute myeloid leukaemia. Clin Exp Immunol 2009; 158:199-204. [PMID: 19737137 DOI: 10.1111/j.1365-2249.2009.04011.x] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
T helper type 17 (Th17) cells, which represent a novel subset of CD4(+) T cells, play an active role in inflammatory and autoimmune diseases. Recent studies have also suggested that they have an impact on solid tumours. However, the nature of Th17 cells in haematological malignancies remains unknown. In this study, we investigated Th17 cell frequency and secretion of related cytokines in patients with acute myeloid leukaemia (AML). First, we found that Th17 cell frequencies were increased significantly in peripheral blood samples from untreated patients with AML, compared with those from healthy volunteers. Moreover, increased interleukin (IL)-17 concentrations accompanied the increased Th17 cell frequencies in these patients. These results suggest that Th17 cells may play a role in the pathogenesis of AML. Secondly, we found that the increased Th17 cell frequencies were reduced when patients achieved complete remission after chemotherapy, suggesting that measurement of Th17 cell frequencies may have clinical value in the evaluation of therapeutic effect. In addition, we found that IL-6 and transforming growth factor (TGF)-beta1 concentrations increased in the untreated patients and that IL-6 concentrations showed a positive correlation with the frequencies of Th17 cells, suggesting that IL-6 may play an important role in Th17 cell differentiation in patients with AML.
Collapse
|
818
|
Chen Q, Viall C, Kang Y, Liu B, Stone P, Chamley L. Anti-phospholipid antibodies increase non-apoptotic trophoblast shedding: a contribution to the pathogenesis of pre-eclampsia in affected women? Placenta 2009; 30:767-73. [PMID: 19631379 DOI: 10.1016/j.placenta.2009.06.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 06/24/2009] [Accepted: 06/25/2009] [Indexed: 10/20/2022]
Abstract
Pre-eclampsia is associated with trophoblast shedding-deportation and endothelial cell dysfunction. Anti-phospholipid autoantibodies increase a women's risk factor of developing pre-eclampsia. In this study we examined the hypothesis that anti-phospholipid antibodies alter the number and nature of trophoblasts shed from the placenta, and that phagocytosis of these altered trophoblasts results in endothelial cell activation. To investigate this we used a placental explant model in which explants were treated with anti-phospholipid antibodies. This treatment resulted in a doubling of the amount of trophoblast shed from the explants. Furthermore, the trophoblasts shed from anti-phospholipid antibody-treated explants were more readily phagocytosed by endothelial cells and subsequently caused the activation of the endothelial cells, as indicated by increased expression of endothelial cell surface ICAM-1 determined by cell-based ELISA, and monocyte adhesion as determined by flow cytometry. Confocal microscopy analysis of trophoblasts shed from anti-phospholipid antibody-treated or control explants demonstrated that anti-phospholipid antibodies, but not control antibodies, were internalised within trophoblasts shed from the explants, and this was accompanied by a reduction in the activity of caspases 3 and 7 in the shed trophoblasts as indicated by FLICA. These results suggest that anti-phospholipid antibodies are selectively transported into trophoblasts where they affect the regulation of the cell cycle leading to excess and aberrant death (necrotic or aponecrotic) and shedding of trophoblasts. If reflected in vivo this might explain, at least in part, how anti-phospholipid antibodies contribute to the pathogenesis of pre-eclampsia.
Collapse
|
819
|
Chen Q, Weinberger D, Callicott J, Tan H. Brain network dynamics in an event-related fMRI working memory paradigm. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71497-1] [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] Open
|
820
|
Browne LB, Chen Q, Prust MJ, Nixon DC, Weinberger DR, Callicott JH, Tan HY. Event-Related fMRI Study of Prefrontal-Hippocampal Dysregulation in Schizophrenia. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)72116-0] [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] Open
|
821
|
Tong Y, Chen Q, Barnett A, Das S, Reed J, Sambataro F, Cheng X, Weinberger D, Mattay V. An automated approach to control for intrasubject variability across fMRI sessions. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70527-0] [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] Open
|
822
|
Chen AG, Chen Q, Libby L, Weinberger DR, Callicott JH, Tan HY. Adaptation of Cortical-Striatal Recruitment and Effective Connectivity across Event-Related Working Memory Trials. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71969-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
823
|
Liu J, Qin J, Feng Y, Bao H, Zhou Q, Chen Q. Distribution of vasoactive intestinal peptide and substance P messenger ribonucleic acid in intestinal nerve of Remak of chicken. Poult Sci 2009; 88:1421-6. [PMID: 19531713 DOI: 10.3382/ps.2008-00290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The intestinal nerve of Remak (INR) is unique to birds. The exact distributions and secretions of the peptide transmitters in the INR that innervate the intestine, and the patterns of their projections to the nerve plexus of the intestinal wall, are still unclear. In the present study, the distributions of chicken vasoactive intestinal peptide (VIP) mRNA and substance P (SP) mRNA in the chicken INR were demonstrated by means of in situ hybridization histochemistry, using sense and antisense digoxigenin-labeled RNA probes. The in situ hybridization histochemistry results suggested that VIP mRNA-positive neurons were mainly distributed in ganglions, whereas some of the INR fibers were weakly positive. The proportion of VIP mRNA-positive cells among total neurons was 75% in the juxta-jejunoileum portion and 87% in the juxta-rectal portion of the INR. Most SP mRNA-positive cells were sporadically distributed in layers or small groups within the ganglions, as well as in nerve trunks between ganglions. Moreover, the proportion of positive cells among total neurons was 83% in the juxta-jejunoileum portion and 98% in the juxta-rectal portion of the INR, which suggests that both VIP and SP mRNA are coexpressed in the chicken INR. Our results provide an approach to further study of the locations of VIP and SP in nerve tissue.
Collapse
|
824
|
Chen Q, Li DY, Oiwa K. Phenomenological simulation of self-organization of microtubule driven by dynein c. J Chem Phys 2009; 130:214107. [DOI: 10.1063/1.3139300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
825
|
Chen Q, Lu W, Schnarr E, Ruchala K, Olivera G. SU-FF-T-291: Verification of In-Vivo Dosimetry in TomoTherapy Treatments. Med Phys 2009. [DOI: 10.1118/1.3181768] [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
|