151
|
Zhou J, Wang L, Wang F, Xu P, Li Y, Bai B, Dang L, Sun D. 4q27 as a psoriasis susceptibility locus in the Northeastern Chinese Han population. ACTA ACUST UNITED AC 2014; 85:15-9. [PMID: 25495849 DOI: 10.1111/tan.12471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 09/23/2014] [Accepted: 10/13/2014] [Indexed: 01/19/2023]
Abstract
Psoriasis is an autoimmune inflammatory skin disease with genetic components. Chromosome 4q27 is related to many autoimmune diseases, however, the relationship between psoriasis and 4q27 has not been fully established yet. The objective of this study is to investigate the association between chromosome 4q27 and psoriasis in the Northeastern Chinese Han population. Four common single nucleotide polymorphisms (rs2069762, rs4833837, rs6840978, and rs7684187) from chromosome 4q27 were genotyped in 400 psoriasis cases and 398 controls from the Northeastern Chinese Han population using the Multiplex SNaPSHOT method. Single nucleotide polymorphism and haplotype frequencies were analyzed using spss 13.0. Our data indicated that rs2069762 GG, TG genotypes [GG: odds ratio (OR) = 2.6875, 95% confidence interval (CI) = 1.5948-4.5290, P < 0.0001; TG: OR = 1.6159, 95% CI = 1.2044-2.1681, P = 0.0013], and H3 haplotype (OR = 1.717, 95% CI = 1.050-2.808, P = 0.030) increased the risk of psoriasis. Furthermore, rs4833837 GG, GA genotypes (GG: OR = 0.2071, 95% CI = 0.0685-0.6266, P = 0.0022; GA: OR = 0.4711, 95% CI = 0.3289-0.6746, P < 0.0001), and H5 haplotype (OR = 0.482, 95% CI = 0.238-0.978, P = 0.039) were identified as protective factors for psoriasis. 4q27 polymorphisms are associated with psoriasis in the Northeastern Chinese Han population.
Collapse
|
152
|
Zhang QH, Dou HT, Xu P, Zhuang SC, Liu PS. Tumor recurrence and drug resistance properties of side population cells in high grade ovary cancer. Drug Res (Stuttg) 2014; 65:153-7. [PMID: 25504004 DOI: 10.1055/s-0034-1375609] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
INTRODUCTION The presence of subset of cancer stem cells (CSCs) called "Side population" (SP) cells has been identified in several solid tumors, responsible for treatment failure especially chemotherapy, and cancer relapse. The present study was aimed to isolate and characterize cancer stem like cells side population cells from high grade ovarian cancer. METHODS The collected cancer samples were analyzed for presence of SP cells by FACS using Hoechst 33342 exclusion technique. Further the FACS sorted SP and non-SP cells were subjected to analysis of stem cell surface protein expression by western blot and immunocytochemistry, drug resistance and sphere formation assay. RESULTS By FACS, we have identified 3.7% of cancer stem cell like side population cells in ovarian cancer whose prevalence was reduced to 0.5% upon treatment with verapamil an inhibitor of ABC transporter. Further, these sorted SP cells showed over expression of ABCG2 (ABC transporter), stem cell proteins such as CD144, CD44, EpCAM and antiapoptotic factor Bcl-2. Also the SP cells showed high resistance to chemotherapy drugs, have high survival rate and they are highly potential to form tumor spheres. CONCLUSION Our data suggest that ovarian cancer contain small sub-population of side population cells which shares some characteristics of stem cells. The co-expression of ABC transporters and stem cells surface markers in SP cells may associate with resistance to chemotherapeutic agents, apoptosis and also supports a role for these cells in tumor recurrence, metastasis and invasion.
Collapse
|
153
|
Ye X, Qi J, Wu Y, Yu D, Xu P, Li S, Zhu S, Wu Q, Ren G, Li D. Comparison of PEGylated FGF-21 with insulin glargine for long-lasting hypoglycaemic effect in db/db mice. DIABETES & METABOLISM 2014; 41:82-90. [PMID: 25451186 DOI: 10.1016/j.diabet.2014.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 08/28/2014] [Accepted: 09/11/2014] [Indexed: 11/25/2022]
Abstract
AIM This study investigated the long-acting antidiabetic efficacy of PEGylated fibroblast growth factor (FGF)-21 in type 2 diabetic db/db mice. METHODS PEGylated FGF-21 was prepared by modifying the N-terminus of human FGF-21 (hFGF-21) using mPEG-ALD. To compare the long-lasting hypoglycaemic effects of PEGylated FGF-21 and insulin glargine in diabetic db/db mice, their pharmacological efficacy was evaluated by changes in blood glucose levels, body weight, insulin levels, glycosylated haemoglobin levels, lipid profile and liver function parameters, and by oral glucose tolerance tests (OGTTs). RESULTS Both PEGylated FGF-21 and insulin glargine decreased plasma glucose in db/db mice. However, compared with insulin glargine treatment, PEGylated FGF-21 therapy had more significant effects in lowering blood glucose and glycosylated haemoglobin levels, improving lipid profile and liver function parameters, alleviating insulin resistance and reducing the glucose area under the curve in OGTTs. CONCLUSION Our results suggest that PEGylated FGF-21 is an ideal candidate as a long-acting antidiabetes drug, and holds significant promise as an effective therapeutic agent in the treatment of type 2 diabetes patients.
Collapse
|
154
|
|
155
|
Jin H, Liu FM, Xu P, Xia JL, Zhong ML, Yuan Y, Zhou JW, Gong YX, Wang W, Zhu SN. On-chip generation and manipulation of entangled photons based on reconfigurable lithium-niobate waveguide circuits. PHYSICAL REVIEW LETTERS 2014; 113:103601. [PMID: 25238358 DOI: 10.1103/physrevlett.113.103601] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Indexed: 05/14/2023]
Abstract
A consequent tendency toward high-performance quantum information processing is to develop the fully integrated photonic chip. Here, we report the on-chip generation and manipulation of entangled photons based on reconfigurable lithium-niobate waveguide circuits. By introducing a periodically poled structure into the waveguide circuits, two individual photon-pair sources with a controllable electro-optic phase shift are produced within a Hong-Ou-Mandel interferometer, resulting in a deterministically separated identical photon pair. The state is characterized by 92.9±0.9% visibility Hong-Ou-Mandel interference. The photon flux reaches ∼1.4×10(7) pairs nm-1 mW-1. The whole chip is designed to contain nine similar units to produce identical photon pairs spanning the telecom C and L band by the flexible engineering of nonlinearity. Our work presents a scenario for on-chip engineering of different photon sources and paves the way to fully integrated quantum technologies.
Collapse
|
156
|
Lang J, Xu P, Huang Y, Huang J, Feng M. Early Changes in ADC Involved in MMP-9 Expression Predict the Response of Tumor to Irradiation on Mice Bearing U14 Cervical Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2340] [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]
|
157
|
Xu P, Xu H, Tang X, Xu L, Wang Y, Guo L, Yang Z, Xing Y, Wu Y, Warner M, Gustafsson JA, Fan X. Liver X receptor β is essential for the differentiation of radial glial cells to oligodendrocytes in the dorsal cortex. Mol Psychiatry 2014; 19:947-57. [PMID: 24934178 DOI: 10.1038/mp.2014.60] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 04/23/2014] [Accepted: 04/24/2014] [Indexed: 01/22/2023]
Abstract
Several psychiatric disorders are associated with aberrant white matter development, suggesting oligodendrocyte and myelin dysfunction in these diseases. There are indications that radial glial cells (RGCs) are involved in initiating myelination, and may contribute to the production of oligodendrocyte progenitor cells (OPCs) in the dorsal cortex. Liver X receptors (LXRs) are involved in maintaining normal myelin in the central nervous system (CNS), however, their function in oligodendrogenesis and myelination is not well understood. Here, we demonstrate that loss of LXRβ function leads to abnormality in locomotor activity and exploratory behavior, signs of anxiety and hypomyelination in the corpus callosum and optic nerve, providing in vivo evidence that LXRβ deletion delays both oligodendrocyte differentiation and maturation. Remarkably, along the germinal ventricular zone-subventricular zone and corpus callosum there is reduced OPC production from RGCs in LXRβ(-/-) mice. Conversely, in cultured RGC an LXR agonist led to increased differentiation into OPCs. Collectively, these results suggest that LXRβ, by driving RGCs to become OPCs in the dorsal cortex, is critical for white matter development and CNS myelination, and point to the involvement of LXRβ in psychiatric disorders.
Collapse
|
158
|
Shi ZG, Li SQ, Li ZJ, Zhu XJ, Xu P, Liu G. Expression of vimentin and survivin in clear cell renal cell carcinoma and correlation with p53. Clin Transl Oncol 2014; 17:65-73. [PMID: 25028191 DOI: 10.1007/s12094-014-1199-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 06/16/2014] [Indexed: 01/31/2023]
Abstract
PURPOSE This study focuses on investigating the expression correlation of vimentin, survivin and p53 in clear cell renal cell carcinoma (ccRCC) and the clinical significance. METHODS The mRNA and protein expression levels of the vimentin, survivin and p53 were determined in ccRCC and adjacent normal renal tissues, using quantitative real-time-polymerase chain reaction (qRT-PCR) and Western blot. We detected the expression and localization of vimentin, survivin and p53 protein in ccRCC by immunohistochemistrical SP method and analyzed the relationships among clinical pathologic parameters and patient prognosis. RESULTS The expression of vimentin and survivin was significantly increased in ccRCC compared with adjacent normal renal tissues, which were positively correlated with the pathological grade and clinical stage (P < 0.05). p53 was highly expressed in ccRCC compared with normal tissues (P < 0.05), which was not positively correlated with the pathological grade and clinical stage (P > 0.05). Furthermore, univariate and multivariate analysis showed that high expression levels of vimentin and survivin were independent prognostic indicators for ccRCC. The levels of vimentin and survivin were positively correlated in ccRCC (r = 0.428, P < 0.01). CONCLUSIONS Reliable basis about biological behavior and prognosis judgments of ccRCC can be provided by combining detection of vimentin and survivin. Foundation and new ideas for gene therapy of ccRCC may be provided by further studying the relationship among vimentin, survivin and p53 in ccRCC.
Collapse
|
159
|
Chen L, Xu P, Bai YF, Luo XW, Zhong ML, Dai M, Lu MH, Zhu SN. Concurrent optical parametric down-conversion in χ(2) nonlinear photonic crystals. OPTICS EXPRESS 2014; 22:13164-13169. [PMID: 24921512 DOI: 10.1364/oe.22.013164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We experimentally investigated concurrent parametric downconversion processes in a two-dimensional hexagonally poled lithium tantalate crystal. The substantial enhancement of parametric gain was observed when concurrent processes shared a common parametric beam. Both degenerate and nondegenerate concurrent parametric downconversion processes were studied. Analyses of the spatial forms and output angles showed a strong dependence on the working temperature, during which a well-defined beamlike parametric output was observed. Our results will stimulate the design for coherent high-gain generation of multiple parametric beams and also shed light on the compact engineering of path-entanglement with specific spatial forms based on concurrent spontaneous parametric downconversion processes.
Collapse
|
160
|
Xu P, Neek-Amal M, Barber SD, Schoelz JK, Ackerman ML, Thibado PM, Sadeghi A, Peeters FM. Unusual ultra-low-frequency fluctuations in freestanding graphene. Nat Commun 2014; 5:3720. [DOI: 10.1038/ncomms4720] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 03/26/2014] [Indexed: 11/09/2022] Open
|
161
|
Li G, Xu P, Pan X, Qin H, Chen Y. The effect of age on apparent diffusion coefficient values in normal spleen: A preliminary study. Clin Radiol 2014; 69:e165-7. [DOI: 10.1016/j.crad.2013.11.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/21/2013] [Accepted: 11/26/2013] [Indexed: 01/19/2023]
|
162
|
Xu P, Lin S, Wei L, Shang W. Antineutrophil cytoplasmic antibody-associated vasculitis associated with Epstein-Barr virus infection: a case report and review of the literature. Infection 2014; 42:591-4. [PMID: 24610176 DOI: 10.1007/s15010-014-0606-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 02/22/2014] [Indexed: 12/21/2022]
Abstract
A 16-year-old female with fever was admitted to our hospital. On admission, her serum IgM antibody against Epstein-Barr virus (EBV) was positive. Then, the disease aggravated and acute kidney injury occurred gradually. Antineutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis (AAV) was confirmed by serum test and kidney biopsy. The patient was treated with oral methylprednisolone. Along with the disappearance of the IgM anti-EBV antibody, the AAV also relieved without relapse during follow-up for half a year. Although a previous study indicated that there was a high positive rate of ANCA in the sera positive for IgM antibodies to EBV and EBV infection might trigger the relapse of AAV, this is the first case of incipient AAV associated with acute EBV infection. One possible explanation might be that EBV infection stimulated the production of ANCA.
Collapse
|
163
|
Li G, Zhou X, Xu P, Pan X, Chen Y. Microstructure assessment of the thalamus in Wilson's disease using diffusion tensor imaging. Clin Radiol 2014; 69:294-8. [DOI: 10.1016/j.crad.2013.10.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/17/2013] [Accepted: 10/22/2013] [Indexed: 12/13/2022]
|
164
|
Fu B, Wang YK, Xu P, Yan K, Li M. Value of ecosystem hydropower service and its impact on the payment for ecosystem services. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 472:338-46. [PMID: 24291631 DOI: 10.1016/j.scitotenv.2013.11.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/01/2013] [Accepted: 11/03/2013] [Indexed: 05/04/2023]
Abstract
Hydropower is an important service provided by ecosystems. We surveyed all the hydropower plants in the Zagunao River Basin, Southwest China. Then, we assessed the hydropower service by using the InVEST (The Integrated Value and Tradeoff of Ecosystem Service Tools) model. Finally, we discussed the impact on ecological compensation. The results showed that: 1) hydropower service value of ecosystems in the Zagunao River Basin is 216.29 Euro/hm(2) on the average, of which the high-value area with more than 475.65 Euro/hm(2) is about 750.37 km(2), accounting for 16.12% of the whole watershed, but it provides 53.47% of the whole watershed service value; 2) ecosystem is an ecological reservoir with a great regulation capacity. Dams cannot completely replace the reservoir water conservation function of ecosystems, and has high economic and environmental costs that must be paid as well. Compensation for water conservation services should become an important basis for ecological compensation of hydropower development. 3) In the current PES cases, the standard of compensation is generally low. Cascade development makes the value of upstream ecosystem services become more prominent, reflecting the differential rent value, and the value of ecosystem services should be based on the distribution of differentiated ecological compensation.
Collapse
|
165
|
Qiang J, He J, Yang H, Wang H, Kpundeh M, Xu P, Zhu Z. Temperature modulates hepatic carbohydrate metabolic enzyme activity and gene expression in juvenile GIFT tilapia (Oreochromis niloticus) fed a carbohydrate-enriched diet. J Therm Biol 2014; 40:25-31. [DOI: 10.1016/j.jtherbio.2013.12.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 11/25/2013] [Accepted: 12/22/2013] [Indexed: 11/16/2022]
|
166
|
Yang Y, Li Z, Tao HF, Qi XY, Wang WL, Yang L, Wang H, Xu P. An elevated plasma level of visfatin increases the risk of myocardial infarction. GENETICS AND MOLECULAR RESEARCH 2014; 13:8586-95. [PMID: 24615088 DOI: 10.4238/2014.january.24.18] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Visfatin, an adipocytokine involved in metabolic and immune disorders, plays an important role in the etiology of cardiovascular disease. Recent evidence has shown that an elevated plasma level of visfatin may increase the risk of myocardial infarction (MI), but individual published studies have shown inconclusive results. This study aimed to obtain a more precise estimate of the association between the plasma visfatin level and MI risk through a detailed meta-analysis of studies published in peer-reviewed journals. A literature search of articles published before May 1, 2013 was performed on the PubMed, Embase, Web of Science, and China BioMedicine databases. Crude standardized mean differences (SMDs) with 95% confidence intervals (CI) were calculated. Eleven case-control studies comprising 362 MI patients and 322 healthy controls were included. The meta-analysis revealed that an elevated plasma level of visfatin was associated with an increased risk of MI (SMD = 3.82, 95%CI = 2.67-4.98, P < 0.001). Further stratification based on the source of the controls showed that an elevated plasma level of visfatin was significantly associated with increased risk of MI in both hospital-based and population-based studies (SMD = 4.12, 95%CI = 2.23-6.01, P < 0.001 and SMD = 3.65, 95%CI = 2.67- 4.98, P < 0.001, respectively). No publication bias was evident in this meta-analysis. In conclusion, the current meta-analysis indicates that an elevated plasma level of visfatin increases the risk of MI. Therefore, plasma visfatin may be a promising biomarker for the diagnosis of MI.
Collapse
|
167
|
Zhu Y, Deng B, Zhang L, Xu P, Du X, Zhang Q, Yang B. Protein-protein interaction network analysis of osteoarthritis-related differentially expressed genes. GENETICS AND MOLECULAR RESEARCH 2014; 13:9343-51. [DOI: 10.4238/2014.november.11.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
168
|
Berardi L, Liu S, Laucelli D, Xu S, Xu P, Zeng W, Giustolisi O. Energy Saving and Leakage Control in Water Distribution Networks: A Joint Research Project between Italy and China. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.proeng.2014.02.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
169
|
Pestell RG, Tian L, Wang C, Soccio R, Hagen FK, Chen ER, Gormley M, Zhong Z, Ertel A, Addya S, Zhou J, Powell MJ, Xu P, Casimiro MC, Lisanti MP, Fortina P, Deng H, Sauve AA. Abstract P2-06-02: Pparg deacetylation by SIRT1 determines breast tumor lipid synthesis and growth. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p2-06-02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Peroxisome proliferator-activated receptorg (Pparγ) is a member of the nuclear receptor (NR) superfamily, which regulates diverse biological functions including lipogenesis and differentiation, anti-inflammation, insulin sensitivity, cellular proliferation, and autophagy. Independent lines of evidence support a role for Pparγ as either a collaborative oncogene or as a tumor suppressor. Heterozygous mutations of Pparγ have been detected in 4/55 patients with colon cancer and a chromosomal translocation between PAX8 and Pparγ in follicular thyroid cancer appeared to serve as a dominant inhibitor of endogenous Pparγ expression. Pparγ agonists reduced tumorigenesis in several in vivo models. In contrast, several studies suggest Pparγ may enhance tumor growth. Pparγ ligands increased polyp numbers in the Apc mouse model of familial adenomatosis. Pparγ and its ligands inhibit breast tumor growth; however, constitutively active Pparγ collaborated in mammary oncogenesis with polyoma middle T antigen or oncogenic ErbB2.
Pparγ activation involves post-translational modifications including phosphorylation and sumoylation upon growth factor or ligand stimulus. Mutation of the Pparγ1 sumoylation site at K77 and K365 demonstrated that K77 may either reduce Pparγ-dependent gene induction and enhance repression or reduce repression, depending upon the synthetic reporter gene used. Lysine residues of nuclear receptors also serve as substrates for acetylation and Pparγ binds co-activators and co-repressors with intrinsic or associated histone acetylase or deacetylase activity including NCoR, SMRT, SIRT1, and p300. Initially characterized for the ERα, AR and, subsequently, the orphan nuclear receptor steroidogenic factor 1 (SF-1), acetylation occurs at a conserved lysine motif shared amongst evolutionarily related nuclear receptors. Several nuclear receptors and co-integrators involved in lipid metabolism are regulated by acetylation including p300, PGC1α, FXR, LXR and RAR. Both TSA- and NAD-sensitive HDACs (e.g. SIRT1) regulate Pparγ function and SIRT1 inhibits Pparγ-dependent adipocyte differentiation. Whether Pparγ is acetylated in cancer cells and how Pparγ exerts it's crucial, though controversial, function in tumorigenesis have not been established.
Pparγ induces gene transcription through binding specific NR half-sites and through non-canonical binding sequences (such as CREB/AP-1 sites). Transcriptional repression involves Pparγ sumoylation at lysine 77 (K77). Herein, Pparγ was shown to be acetylated at nine distinct lysine residues. SIRT1 bound and deacetylated Pparγ at K154/155. ChIP-Seq analysis for genome-wide DNA binding demonstrated the acetylation site was required for binding NR half-sites, but was not required for non-canonical site binding. Breast tumor growth, de novo lipid synthesis, induction of autophagy and evasion of apoptosis was promoted by K154/155 and inhibited by K77 in vivo. Pparγ acetylation induced a gene signature that was increased in breast cancer, associated with a reduction in SIRT1 abundance and poor outcome. The Pparγ acetylation site determines binding to autophagy and apoptosis signaling to regulate breast tumor lipid metabolism and growth.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-06-02.
Collapse
|
170
|
Zhang L, Xu MM, Zeng L, Liu S, Liu X, Wang X, Li D, Huang RZ, Zhao LB, Zhan QL, Zhu D, Zhang YY, Xu P, Xie P. Evidence for Borna disease virus infection in neuropsychiatric patients in three western China provinces. Eur J Clin Microbiol Infect Dis 2013; 33:621-7. [PMID: 24170181 DOI: 10.1007/s10096-013-1996-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 10/07/2013] [Indexed: 11/24/2022]
Abstract
Borna disease virus (BDV) is a non-cytolytic, neurotropic RNA virus that can infect a wide variety of vertebrate species from birds and primates to humans. Several studies have been carried out to investigate whether BDV is associated with neuropsychiatric diseases. However, this association is still inconclusive. Two panels of subjects consisting of 1,679 various neuropsychiatric patients and healthy people from three western China provinces were enrolled in this study. BDV p24 or p40 RNA in peripheral blood mononuclear cells (PBMCs) were detected in the first panel of 1,481 subjects using reverse transcription quantitative polymerase chain reaction (RT-qPCR) and cerebrospinal fluid (CSF) samples from the BDV RNA-positive individuals were subjected to BDV p24 antibodies testing by enzyme-linked immunosorbent assay (ELISA). BDV p24 or p40 RNA in PBMCs and p24 antibodies in plasma were detected in the second panel of 198 subjects by RT-qPCR and Western blot. A higher prevalence for BDV RNA was demonstrated in patients with viral encephalitis (6.70%), Guillain-Barré syndrome (6.70%), schizophrenia (9.90%) and chronic fatigue syndrome (CFS) (12.70%) compared to healthy controls in the first panel. CSF p24 antibodies were demonstrated in three viral encephalitis patients, two schizophrenia patients and two major depressive disorder (MDD) patients. The prevalences of p24 antibodies in plasma from patients with viral encephalitis (13.24%), multiple sclerosis (25.00%) and Parkinson's disease (22.73%) were significantly higher than healthy controls. This study demonstrates that BDV infection also exists in humans from three western China provinces, and suggests the involvement of the contribution of BDV in the aetiology of Chinese patients with some neuropsychiatric disorders, including viral encephalitis, schizophrenia, CFS, multiple sclerosis and Parkinson's disease.
Collapse
|
171
|
Xiao Y, Zheng Y, Tan P, Xu P, Zhang Q. Overexpression of nuclear distribution protein (hNUDC) causes pro-apoptosis and differentiation in Dami megakaryocytes. Cell Prolif 2013; 46:576-85. [PMID: 24010816 DOI: 10.1111/cpr.12055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 05/01/2013] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES Overexpression of hNUDC, a member of the nuclear distribution protein family, reduces cell population growth in prostate cancer cell lines, concurrent with induced morphological change and enhanced polyploidization. These phenomena are also closely associated with terminal phases of megakaryocyte maturation. MATERIALS AND METHODS In Dami cells, MTT and trypan blue assays were used to investigate cell viability and proliferation effects of hNUDC, and flow cytometry was used to analyse cell cycle and DNA content. Real-time RT-PCR was employed to detect mRNA expression. Activations of caspase-3, ERK, Akt and Stat-5 were determined by immunoblotting. May-Grünwald-Giemsa staining was performed to reveal cell morphology. RESULTS AND CONCLUSION Functional studies using adenovirus-mediated hNUDC overexpression led to inhibition of megakaryocyte proliferation via cell cycle arrest in G2/M transition phase. This process could have been be mediated by upregulation of p21 and downregulation of its downstream targets, including cyclin B1, cyclin B2 and c-myc. Enhanced apoptosis in turn ensued, characterized by increased caspase-3 activation, upregulation of pro-apoptotic Bax and downregulation of anti-apoptotic Bcl-2. Furthermore, hNUDC overexpression elevated the level of megakaryocyte maturation, associated with increased polyploidy, cell morphological changes and increased expression of cell surface differentiation markers, including CD10, CD44, CD41 and CD61. Our results further suggest that the ERK signalling pathway was involved in hNUDC overexpression-induced apoptosis. Taken together, this study provides experimental evidence for overexpression of hNUDC in Dami cells and suggests that activation of apoptotic machinery may be involved in megakaryocytic differentiation.
Collapse
|
172
|
Qiang J, Wang H, Kpundeh M, He J, Xu P. Effect of water temperature, salinity, and their interaction on growth, plasma osmolality, and gill Na+, K+-ATPase activity in juvenile GIFT tilapia Oreochromis niloticus (L.). J Therm Biol 2013. [DOI: 10.1016/j.jtherbio.2013.04.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
173
|
Jin H, Xu P, Luo XW, Leng HY, Gong YX, Yu WJ, Zhong ML, Zhao G, Zhu SN. Compact engineering of path-entangled sources from a monolithic quadratic nonlinear photonic crystal. PHYSICAL REVIEW LETTERS 2013; 111:023603. [PMID: 23889400 DOI: 10.1103/physrevlett.111.023603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Indexed: 06/02/2023]
Abstract
An integrated realization of photonic entangled states becomes an inevitable tendency toward integrated quantum optics. Here we report the compact engineering of steerable photonic path-entangled states from a monolithic quadratic nonlinear photonic crystal. The crystal acts as a coherent beam splitter to distribute photons into designed spatial modes, producing the heralded single-photon and appealing beamlike two-photon path entanglement. We characterize the path entanglement by implementing quantum spatial beating experiments. Such a multifunctional entangled source can be further extended to the high-dimensional fashion and multiphoton level, which paves a desirable way to engineering miniaturized quantum light sources.
Collapse
|
174
|
Wu Q, Yang ZP, Xu P, Gao LC, Fan DM. Association between Helicobacter pylori infection and the risk of colorectal neoplasia: a systematic review and meta-analysis. Colorectal Dis 2013; 15:e352-64. [PMID: 23672575 DOI: 10.1111/codi.12284] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Accepted: 02/05/2013] [Indexed: 12/12/2022]
Abstract
AIM The existing evidence on the relationship between Helicobacter pylori infection and the risk of colorectal neoplasia is inconsistent. We conducted a systematic review with a meta-analysis to explore this relationship and to determine whether the relationship varies according to the study characteristics. METHOD We searched the PubMed database and the reference lists of pertinent articles published up to July 2012. Summary odds ratios (ORs) with their 95% confidence intervals (CIs) were estimated using a random-effects model. RESULTS Twenty-seven studies including 3792 cases of colorectal adenoma (CRA) and 3488 cases of colorectal cancer (CRC) were identified. Overall, H. pylori infection was associated with an increased risk of CRA (OR = 1.66, 95% CI 1.39-1.97, I(2) = 54.3%) and CRC (OR = 1.39, 95% CI 1.18-1.64, I(2) = 35.8%), although there was significant heterogeneity among the studies. Subgroup analysis revealed that the positive correlation did not differ by sex, geographic variation or subsite of neoplasia, but might vary by the method of detection of H. pylori. The study was underpowered to determine the risk of colorectal neoplasia associated with cytotoxin-associated gene A-positive H. pylori. CONCLUSION This meta-analysis demonstrates a positive association between H. pylori infection and the risk of colorectal neoplasia.
Collapse
|
175
|
Zhang H, Wang Z, Wu H, Hu X, Zhou Z, Xu P. Radial artery graft vs. saphenous vein graft for coronary artery bypass surgery. Herz 2013; 39:458-65. [DOI: 10.1007/s00059-013-3848-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 04/29/2013] [Accepted: 05/05/2013] [Indexed: 11/29/2022]
|
176
|
Kremer J, Wenkert D, Grant S, Xu P, Koenig A, Collier D. AB0472 The frequency of methotrexate (MTX) or prednisone discontinuation and of TNF inhibitor (TNFI) discontinuation/switching in rheumatoid arthritis (RA) patients results from 2002-2004 and 2007-2009 in a large us registry. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
177
|
Yu X, Wang L, Xu P. THU0156 Response of ra on MRI-detected synovitis to double filtration plasmapheresis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
178
|
Purnell TS, Xu P, Leca N, Hall YN. Racial differences in determinants of live donor kidney transplantation in the United States. Am J Transplant 2013; 13:1557-65. [PMID: 23669021 PMCID: PMC4282921 DOI: 10.1111/ajt.12258] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 03/08/2013] [Accepted: 03/15/2013] [Indexed: 01/25/2023]
Abstract
Few studies have compared determinants of live donor kidney transplantation (LDKT) across all major US racial-ethnic groups. We compared determinants of racial-ethnic differences in LDKT among 208 736 patients who initiated treatment for end-stage kidney disease during 2005-2008. We performed proportional hazards and bootstrap analyses to estimate differences in LDKT attributable to sociodemographic and clinical factors. Mean LDKT rates were lowest among blacks (1.19 per 100 person-years [95% CI: 1.12-1.26]), American Indians/Alaska Natives-AI/ANs (1.40 [1.06-1.84]) and Pacific Islanders (1.10 [0.78-1.84]), intermediate among Hispanics (2.53 [2.39-2.67]) and Asians (3.89 [3.51-4.32]), and highest among whites (6.46 [6.31-6.61]). Compared with whites, the largest proportion of the disparity among blacks (20%) and AI/ANs (29%) was attributed to measures of predialysis care, while the largest proportion among Hispanics (14%) was attributed to health insurance coverage. Contextual poverty accounted for 16%, 4%, 18%, and 6% of the disparity among blacks, Hispanics, AI/ANs and Pacific Islanders but none of the disparity among Asians. In the United States, significant disparities in rates of LDKT persist, but determinants of these disparities vary by race-ethnicity. Efforts to expand preESKD insurance coverage, to improve access to high-quality predialysis care and to overcome socioeconomic barriers are important targets for addressing disparities in LDKT.
Collapse
|
179
|
Yang L, Li H, Sunzel M, Xu P, Edeki T, Li J. P115 Pharmacokinetics (PK) and safety of single and multiple intravenous (IV) infusions of ceftaroline fosamil in healthy Chinese subjects. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70359-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
180
|
Xu P, Zhang XL, Xie GB, Zhang CW, Shen SM, Zhang XX, Cao YX, Wang WJ, Che YN, Xia YJ, Wu XK, Yi L, Gao Q, Wang Y. The (TTTA) n polymorphism in intron 4 of CYP19 and the polycystic ovary syndrome risk in a Chinese population. Mol Biol Rep 2013; 40:5041-7. [DOI: 10.1007/s11033-013-2605-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 04/29/2013] [Indexed: 10/26/2022]
|
181
|
Xu P, Yu SS, Qiao L. Electronic properties of a patchwork of armchair graphene nanoribbon and triangular boron nitride nanoflake. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2012.744458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
182
|
Shi J, Xu P, Zhong ML, Gong YX, Bai YF, Yu WJ, Li QW, Jin H, Zhu SN. Heralded generation of multipartite entanglement for one photon by using a single two-dimensional nonlinear photonic crystal. OPTICS EXPRESS 2013; 21:7875-7881. [PMID: 23571878 DOI: 10.1364/oe.21.007875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We propose a compact scheme for the heralded generation of single-photon multipartite entanglement by using a single two-dimensional nonlinear photonic crystal. Studies have shown that by appropriate structure design, the single-photon entanglement shared among three spatially distinct optical modes can be generated through three concurrent spontaneous parametric down-conversion processes by using the other photon in an identical spatial mode as a trigger. Furthermore, we analyze the entanglement of such heralded single-photon tripartite W-type state theoretically. This method can be expanded for the heralded single-photon N-partite entanglement generation. This compact and stable quantum light source may act as a key ingredient in quantum information science.
Collapse
|
183
|
Xu GL, Chen XP, Liang C, Liu DY, Xu P, Cai JY, Zhao CS. Conveying Characteristics of Pulverized Coal in a Top-Discharge Blow Tank System. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200687] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
184
|
Hembrough T, Catenacci DVT, Liao W, Thyparambil S, Xu P, Henderson L, Burrows J. Development of Quantitative Gastrointestinal Carcinoma (GEC and CRC) SRM Assays for Use in FFPE Tumor Tissues. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt046.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
185
|
Lynch JA, Choi CM, Park YS, Lee JC, Park MJ, Kim HR, Shih NY, Chang GC, Tseng SW, Liu KJ, Hsiao KC, Lin HC, Wang JY, Tsai HL, Barak V, Chen YJ, Hsieh YL, Chien PH, Chien YF, Huang WC, Lin SR, Chung FY, Yen LC, Tsai HL, Rixe O, Salkeni AM, Furgason JM, McPherson C, Warnick R, Bahassi M, Hembrough TA, Catenacci DVT, Liao WL, Thyparambil S, Xu P, Henderson L, Burrows J, Bebb DG, Elegbede AA, Kubota E, Petersen LF, Otsuka SM, Lees-Miller SP. Poster session 4. Molecular diagnosis & biomarkers. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
186
|
Li Z, Xu J, Xu P, Liu S, Yang Z. Wnt/β-catenin signalling pathway mediates high glucose induced cell injury through activation of TRPC6 in podocytes. Cell Prolif 2013; 46:76-85. [PMID: 23294354 DOI: 10.1111/cpr.12010] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 08/26/2012] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Diabetic nephropathy is a major complication of diabetes and a frequent cause of end-stage renal disease and recent studies suggest that podocyte damage may play a role in the pathogenesis of this. At early onset of diabetic nephropathy there is podocyte drop-out, which is thought to provoke glomerular albuminuria and subsequent glomerular injury; however, the underlying molecular mechanisms of this remain poorly understood. Here we report that we tested the hypothesis that early diabetic podocyte injury is caused, at least in part, by up-regulation of transient receptor potential cation channel 6 (TRPC6), which is regulated by the canonical Wnt signalling pathway, in mouse podocytes. MATERIALS AND METHODS Mechanism of injury initiation in mouse podocytes, by high concentration of D-glucose (HG, 30 mM), was investigated by MTT, flow cytometry, real-time quantitative PCR, and western blot analysis. RESULTS HG induced apoptosis and reduced viability of differentiated podocytes. It caused time-dependent up-regulation of TRPC6 and activation of the canonical Wnt signalling pathway, in mouse podocytes. In these cells, blockade of the Wnt signalling pathway by dickkopf related protein 1 (Dkk1) resulted in effective reduction of TRPC6 up-regulation and amelioration of podocyte apoptosis. Furthermore, reduction of cell viability induced by HG was attenuated by treatment with Dkk1. CONCLUSION These findings indicate that the Wnt/β-catenin signalling pathway may potentially be active in pathogenesis of TRPC6-mediated diabetic podocyte injury.
Collapse
|
187
|
Zhang Y, Wang S, Li J, Zhang X, Jiang L, Xu P, Lu C, Wan Y, Sun X. Primary genome scan for complex body shape-related traits in the common carp Cyprinus carpio. JOURNAL OF FISH BIOLOGY 2013; 82:125-140. [PMID: 23331142 DOI: 10.1111/j.1095-8649.2012.03469.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
To identify quantitative trait loci (QTL) that affect body shape in common carp Cyprinus carpio, a linkage map, 2159·23 cM long, was constructed with a total of 307 markers covering 51 linkage groups (LG). The map included 167 new single nucleotide polymorphism (SNP) markers derived from expressed sequence tags (EST) together with 140 microsatellite markers reported earlier. A primary genome scan was conducted for QTL for standard length (L(S)), head length (L(H)), body height (H(B)), body width (W(B)) and tail length (L(TAIL)) in an F1 line containing 92 offspring. A total of 15 suggestive QTL on six LGs were found to associate with L(S), L(H), H(B), W(B) and L(TAIL) which explained 10·7-17·4% of the variance. Five significant QTL were detected for body-shape related traits and located for LGs (lg1, 12 and 20). These QTL included: one associated with L(S) (21·1% variance explained), three for H(B) (almost 20% variance explained) and one for W(B) (20·7% variance explained).
Collapse
|
188
|
Qiang J, Yang H, Wang H, Kpundeh M, Xu P. Growth and IGF-I response of juvenile Nile tilapia (Oreochromis niloticus) to changes in water temperature and dietary protein level. J Therm Biol 2012. [DOI: 10.1016/j.jtherbio.2012.07.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
189
|
Gong YX, Xu P, Shi J, Chen L, Yu XQ, Xue P, Zhu SN. Generation of polarization-entangled photon pairs via concurrent spontaneous parametric downconversions in a single χ(2) nonlinear photonic crystal. OPTICS LETTERS 2012; 37:4374-4376. [PMID: 23114300 DOI: 10.1364/ol.37.004374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We propose a scheme for generating polarization-entangled photon pairs using a χ((2)) nonlinear photonic crystal, which is designed for enabling two concurrent quasi-phase-matched spontaneous parametric downconversion processes. Beamlike photon pairs produced from each process are collinear but noncollinear with the pump. Moreover, the source we design works in a postselection-free way and applies to both degenerate and nondegenerate cases. Combining possible waveguide technologies, our scheme may provide an integrated polarization entanglement source.
Collapse
|
190
|
Catenacci D, Xu P, Henderson L, Liao W, Burrows J, Hembrough T. 561 Development of a Quantitative Gastroesophageal Cancer Selected Reaction Monitoring Mass Spectrometric Multiplex Assay for Use in FFPE Tumor Tissues. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72358-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
191
|
Wang Q, Lang J, Song Y, Fan Z, Wang B, Xu P, Wang W. Evaluation of Intra- and Interfraction Movement of the Cervix and the Uterine Body During Intensity Modulated Radiation Therapy. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
192
|
Hembrough T, Henderson L, Xu P, Liao W, Burrows J, Catenacci D. 483 Development of a Quantitative Colorectal Cancer SRM Assay for Use in FFPE Tumor Tissues. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72281-5] [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]
|
193
|
Xu G, Chen X, Liang C, Xu P, Cai J, Zhao C. Effect of Operating Conditions and Powder Properties on Pneumatic Conveying Characteristics of a Top Discharge Blow Tank. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201100675] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
194
|
Bergerson WF, Xu P, Irby JH, Brower DL, Ding WX, Marmar ES. Far-infrared polarimetry diagnostic for measurement of internal magnetic field dynamics and fluctuations in the C-MOD Tokamak (invited). THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:10E316. [PMID: 23126975 DOI: 10.1063/1.4731757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A laser-based (2.55 THz) mulitchord polarimeter is now operational on Alcator C-Mod and is used to make measurements of the internal magnetic field structure as well as plasma fluctuations. The polarimeter is designed to measure the Faraday effect for high-field (up to 8.3 T) and high-density (up to 5 × 10(20) m(-3)) ITER relevant plasma conditions. Initial 3 chord tests are consistent with magnetic equilibrium reconstructions and indicate no measurable contamination from the toroidal magnetic field due to the Cotton-Mouton effect or misalignment. Time response of <1 μs enables the measurement of fast equilibrium temporal dynamics as well as high-frequency fluctuations.
Collapse
|
195
|
Xu P, Shi M, Lai R, Chen XX. Differences in numbers of termicins expressed in two termite species affected by fungal contamination of their environments. GENETICS AND MOLECULAR RESEARCH 2012; 11:2247-57. [PMID: 22614454 DOI: 10.4238/2012.may.10.2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Termicin is a defensin-like antimicrobial peptide of termites that has strong antifungal activity. Fifty-six different termicin mRNAs encoding 46 different peptides were amplified and identified from Odontotermes formosanus (Termitidae), a species that inhabits environments with a large variety of microbial fauna. In contrast, only 38 different termicin mRNAs encoding 21 different peptides were amplified and identified from Reticulitermes chinensis (Rhinotermitidae). All mRNAs were amplified by reverse transcript PCR, with primers designed from reported termicin mRNA sequences. All of these genes showed high intraspecific sequence identity and were found to be highly homologous with other reported termicin genes. These two termite species live in different environments; the latter encounters relatively fewer pathogens in its habitat. We conclude that differences in microenvironmental pressure can affect the number of termicin genes expressed in termite species.
Collapse
|
196
|
Gao Z, Guo X, Duan C, Ma W, Xu P, Wang W, Chen J. Altered Aggrecan Synthesis and Collagen Expression Profiles in Chondrocytes from Patients with Kashin—Beck Disease and Osteoarthritis. J Int Med Res 2012; 40:1325-34. [DOI: 10.1177/147323001204000411] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVES: To investigate cell morphology, aggrecan expression, and type I, II, III and X collagen expression in chondrocytes from adults with Kashin—Beck disease or osteoarthritis (OA). METHODS: Samples of knee articular cartilage were taken during surgery; cartilage samples obtained from fresh cadavers without arthritic disease were used as controls. Samples were digested with collagenase; isolated chondrocytes were cultured in monolayers. Aggrecan was detected by toluidine blue staining; collagen and aggrecan protein levels were evaluated by immuno cytochemistry and immunofluorescence staining. RESULTS: Samples were obtained from six participants per group. Aggrecan and type II collagen levels in chondrocytes from patients were significantly lower than those from controls, but levels of type I, III and X collagen were enhanced in patients compared with controls. Production of type III and X collagen was higher in chondrocytes from patients with Kashin—Beck disease than in those from OA patients. CONCLUSIONS: Biochemical and morphological mechanisms underlying Kashin—Beck disease and OA include enhanced dedifferentiation and hypertrophy of chondrocytes, increased type I, III and X collagen levels, and suppressed type II collagen and aggrecan production compared with control samples.
Collapse
|
197
|
Liu H, Tao Q, Deng H, Ming M, Ding Y, Xu P, Chen S, Song Z, Le W. Genetic analysis of NR4A2 gene in a large population of Han Chinese patients with Parkinson's disease. Eur J Neurol 2012; 20:584-587. [PMID: 22827504 DOI: 10.1111/j.1468-1331.2012.03824.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 06/13/2012] [Indexed: 11/30/2022]
Abstract
BACKGROUND NR4A2 gene is a transcription factor crucial for differentiation and survival of midbrain dopamine (DA) neurons, and several variants have been eported to be associated with Parkinson's disease (PD) in the Caucasian population. METHODS To determine whether there is any association of NR4A2 mutation or variation with PD in the Han Chinese population, we performed a genetic analysis of all the exons and exon-intron boundaries in 689 PD patients and 672 controls from mainland China using direct sequencing analysis. RESULTS We identified four novel variants and two previously reported variants. Two novel variants (exon 2 c.-20 C>G and exon 3 c.711 C>A) were only found in PD. The others (exon 2 c.-35 A>G; exon 8 c.1615 G>A; intron 4 IVS4-16 G>T; and intron 6 IVS6 + 18 insG) were found in both PD and controls at different frequencies. CONCLUSIONS Collectively, our results suggest that NR4A2 may be a susceptibility gene for PD in the Chinese population.
Collapse
|
198
|
Yang FQ, Yang J, Zhang XM, Xu P, Xia ZN. Analysis of Volatile Components in Curcuma Rhizome by Microemulsion Electrokinetic Chromatography. J Chromatogr Sci 2012; 51:155-60. [DOI: 10.1093/chromsci/bms120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
199
|
Catenacci D, Henderson L, Xu P, Liao W, Burrows J, Hembrough T. 820 Development of a Quantitative RON SRM Assay for Use in Formalin Fixed Tumor Tissues. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71453-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
200
|
Su SY, Dong ZJ, Qu JQ, Liang ZY, Zhang JQ, Ma LX, Liu W, Xu P, Yuan XH. Molecular cloning and single nucleotide polymorphism analysis of IGF2a genes in the common carp (Cyprinus carpio). GENETICS AND MOLECULAR RESEARCH 2012; 11:1327-40. [PMID: 22653579 DOI: 10.4238/2012.may.15.3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We studied whether two IGF2 transcripts in common carp are similar to those found in zebrafish. The full-length IGF2a cDNA contains a 5'-terminal untranslated region (UTR) of 105 bp, a 3'-terminal UTR of 1358 bp and an open reading frame of 612 bp, which encodes a 206-amino acid protein. A 6614-bp full-length IGF2a DNA molecule, including the 5'-flanking region, was isolated. Genomic DNA structure analysis revealed that the IGF2a gene contains four exons and three introns. Bioinformatics analysis indicated that the proteins encoded by IGF2a genes in common carp have one signal peptide and one apparent transmembrane region. Bootstrapping was performed 1000 times to obtain support values for each branch. The common carp IGF2a were clustered in one group, while the outgroup (common carp IGF1) clustered in another group. We identified two new single nucleotide polymorphisms in intron 2 of the gene. One polymorphism, A/N, can be found only in the Huanghe carp. The other polymorphism, C/N, can be found in both male Huanghe carp × female Heilongjiang carp and male Huanghe carp × female Jian carp. The second polymorphism, C/N, is primarily transferred from the male and may be related to heterosis.
Collapse
|