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Pavel H, Ajeawung N, Faure R, Poirier D, Kamnasaran D, Ajeawung N, Joshi H, Kamnasaran D, Poirier D, Ajeawung N, Kamnasaran D, Lun X, Zemp F, Sun B, Stechishin O, Luchman A, Kelly JJ, Weiss S, Hamilton MG, Cairncross G, Senger DL, Bell J, McFadden G, Forsyth PA, Tzeng SY, Guerrero-Cazares H, Martinez EE, Young NP, Sunshine JC, Quinones-Hinojosa A, Green JJ, Lei L, D'Amico R, Sisti J, Leung R, Sonabend AM, Guarnieri P, Rosenfeld SS, Bruce JN, Canoll P, Baichwal VR, Reeves L, Chad BL, Zavitz KH, Beelen AP, Mather GG, Carlson RO, Manton C, Chandra J, Keir ST, Reardon DA, Saling JR, Gray LS, Bigner DD, Friedman HS, Zhang J, Brun J, Ogbomo H, Zemp F, Wang Z, Stojdl DJ, Lun X, Forsyth PA, Kong LY, Hatiboglu MA, Wei J, Wang Y, McEnery KA, Fuller GN, Qiao W, Davies MA, Priebe W, Heimberger AB, Amendolara B, Gil O, Lei L, Ivkovic S, Bruce J, Canoll P, Rosenfeld S, Finniss S, Perlstein B, Miller C, Okhrimenko H, Kazimirsky G, Cazacu S, Lemke N, Brodie S, Rempel SA, Rosenblum M, Mikkelsen T, Margel S, Brodie C, Guvenc H, Demir H, Gupta S, Mazumder S, Ray-Chaundhury A, Li T, Li C, Nakano I, Rahman R, Rahman C, Smith S, Macarthur D, Rose F, Shakesheff K, Grundy RG, Brenner AJ, Goins B, Bao A, Miller J, Trevino A, Zuniga R, Phillips WT, Gilg AG, Bowers KG, Toole BP, Maria BL, Leung GK, Sun S, Wong ST, Zhang XQ, Pu JK, Lui WM, Marino AM, Hussaini IM, Amos S, Simpson K, Redpath GT, Lyons C, Dipierro C, Grant GA, Wilson C, Salami S, Macaroni P, Li S, Park JY, Needham D, Bigner D, Dewhirst M, Ohlfest J, Gallardo J, Argawal S, Mittapalli R, Donelson R, Elmquist WF, Nicolaides T, Hariono S, Barkovich K, Hashizume R, Rowitch D, Weiss W, Sheer D, Baker S, Paugh B, Waldman T, Li H, Jones C, Forshew T, James D, Caroline H, Patrick R, Katrin L, Karl F, Ghazaleh T, Michael W, Albrecht V, Thorsteinsdottir J, Wagner E, Tonn JC, Ogris M, Schichor C, Charest G, Paquette B, Sanche L, Mathieu D, Fortin D, Qi X, Cuttitta F, Chu Z, Celerier J, Pakradouni J, Rixe O, Hashizume R, Gragg A, Muller S, Banerjee A, Phillips J, Prados M, Haas-Kogan D, Gupta N, James D, Florence L, Gwendoline VG, Veronique M, Robert K, Agarwal S, Mittapalli RK, Cen L, Carlson BL, Elmquist WF, Sarkaria JN, Sengupta S, Weeraratne SD, Rallapalli S, Amani V, Pierre-Francois J, Teider N, Rotenberg A, Cook J, Pomeroy SL, Jenses F, Cho YJ, Hjouj M, Last D, Guez D, Daniels D, Lavee J, Rubinsky B, Mardor Y, Serwer LP, Noble CO, Michaud K, Drummond DC, Ozawa T, Zhou Y, Marks JD, Bankiewicz K, Park JW, James D, Wang W, Cho H, Weintraub M, Jhaveri N, Torres S, Petasis N, Schonthal AH, Louie SG, Hofman FM, Chen TC, Grada Z, Hegde M, Schaffer DR, Ghazi A, Byrd T, Dotti G, Wels W, Heslop HE, Gottschalk S, Baker M, Ahmed N, Hamblett KJ, Kozlosky CJ, Liu H, Siu S, Arora T, Retter MW, Matsuda K, Hill JS, Fanslow WC, Diaz RJ, Etame A, Meaghan O, Mainprize T, Smith C, Hynynen K, Rutka J, Pradarelli J, Yoo JY, Kaka A, Alvarez-Breckenridge C, Pan Q, Chiocca EA, Teknos T, Kaur B, Lee SY, Slagle-Webb B, Sheehan JM, Connor JR, Cote J, Lepage M, Gobeil F, Fortin D, Kleijn A, Balvers R, Kloezeman J, Dirven C, Lamfers M, Leenstra S, See W, Tan IL, Nicolaides T, Pieper R, Jiang H, White E, Rios-Vicil CI, Yung WKA, Gomez-Manzano C, Fueyo J, Zemp FJ, McKenzie BA, Lun X, McFadden G, Forsyth PA, Mueller S, Yang X, Hashizume R, Gragg A, Smirnov I, Prados M, James DC, Phillips JJ, Berger MS, Rowitch DH, Gupta N, Haas-Kogan DH, D'Amico R, Lei L, Kennedy B, Rosenfeld SS, Canoll P, Bruce JN, Gopalakrishnan V, Das C, Taylor P, Kommagani R, Su X, Aguilera D, Thomas A, Wolff J, Flores E, Kadakia M, Alkins R, Broderson P, Sodhi R, Hynynen K, Chung SA, McDonald KL, Shen H, Day BW, Stringer BW, Johns T, Decollogne S, Teo C, Hogg PJ, Dilda PJ, Patel TR, Zhou J, Piepmeier JM, Saltzman WM, Vogelbaum MA, Agarwal S, Manchanda P, Ohlfest JR, Elmquist WF, Kitange GJ, Mladek AC, Carlson BL, Schroeder MA, Pokorny JL, Sarkaria JN, Ogbomo H, Lun X, Zhang J, McFadden G, Mody C, Forsyth P, Dasgupta T, Yang X, Hashizume R, Gragg A, Prados M, Nicolaides T, James CD, Haas-Kogan D, Madhankumar AB, Webb BS, Park A, Harbaugh K, Sheehan J, Connor JR. PRECLINICAL EXPERIMENTAL THERAPEUTICS AND PHARMACOLOGY. Neuro Oncol 2011. [DOI: 10.1093/neuonc/nor158] [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
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Almokhles H, Pan Q, Calitchi É, Diana C, Muresan M, Jiang M, Wu J, Wang X, Lu H, Lagrange J. Évaluation des risques de sténose du canal anal lors de la radiothérapie prostatique. Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.174] [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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Fan YH, Dong H, Pan Q, Cao YJ, Li H, Wang HC. Notch signaling may negatively regulate neonatal rat cardiac fibroblast-myofibroblast transformation. Physiol Res 2011; 60:739-48. [PMID: 21812518 DOI: 10.33549/physiolres.932149] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Cardiac fibroblast-myofibroblast transformation (CMT) is a critical event in the initiation of myocardial fibrosis. Notch signaling has been shown to regulate myofibroblast transformation from other kinds of cells. However, whether Notch signaling is also involved in CMT remains unclear. In the present study, expressions of Notch receptors in cardiac fibroblasts (CFs) were examined, effects of Notch signaling inhibitor N-[N-(3,5-difluorophenacetyl)-l-alanyl]-S-phenylglycine t-butyl ester (DAPT) and transforming growth factor-beta1 (TGF-beta1) on CMT were determined by increasing alpha-smooth muscle actin (alpha-SMA) expression and collagen synthesis, and Notch signaling was examined by analyzing expressions of Notch receptors. The results showed that: (1) Notch receptor 1, 2, 3 and 4 were all expressed in CFs; (2) DAPT promoted CMT in a time-dependent manner; (3) During the period of CMT induced by TGF-beta1, expressions of Notch receptor 1, 3 and 4 in CFs were down-regulated, whereas there was no change for Notch receptor 2. Moreover, the downtrends of Notch 1, 3 and 4 were corresponding to the trend growth of alpha-SMA expression and collagen synthesis. These results suggested that inhibiting of Notch signaling might promote CMT. The down-regulations of Notch receptor 1, 3 and 4 induced by TGF-beta1 may facilitate CMT. In conclusion, inhibition of Notch signaling might be a novel mechanism of CMT in myocardial fibrosis.
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Shi CH, Tang BS, Wang L, Lv ZY, Wang J, Luo LZ, Shen L, Jiang H, Yan XX, Pan Q, Xia K, Guo JF. PLA2G6 gene mutation in autosomal recessive early-onset parkinsonism in a Chinese cohort. Neurology 2011; 77:75-81. [PMID: 21700586 DOI: 10.1212/wnl.0b013e318221acd3] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Mutations in the PLA2G6 gene at the PARK14 locus have been reported in complicated parkinsonism. To assess the prevalence of and phenotypes associated with PLA2G6 gene mutations, we screened PLA2G6 mutations in a cohort of patients with autosomal recessive early-onset parkinsonism (AREP). METHODS We selected 12 families with AREP in which the Parkin, PINK1, DJ-1, ATP13A2, and FBXO7 gene mutations had been previously excluded. All patients came from the mainland of China. The entire PLA2G6 coding region and exon-intron boundaries were sequenced from genomic DNA templates. We then performed PET studies on individuals in the pedigree with a homozygous PLA2G6 mutation, and investigated the enzyme activity level of the mutation. RESULTS A homozygous missense mutation, c.G991T (p.D331Y), was identified in an autosomal recessive case. A younger sister of the p.D331Y-carrying patient was also homozygous for the mutation, but with no extrapyramidal symptoms. A PET study showed a substantial reduction in dopamine transporter (DAT) binding in the p.D331Y patient, and a slight reduction in DAT binding in his sister. In vitro, we experimentally demonstrate that the D331Y mutation caused an approximately 70%reduction in enzyme activity. CONCLUSIONS We have confirmed that the PLA2G6 gene allocated PARK14 locus and is associated with AREP.
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Pan Q, Qiao F, Gao C, Norman B, Optican L, Zelenka PS. Cdk5 targets active Src for ubiquitin-dependent degradation by phosphorylating Src(S75). Cell Mol Life Sci 2011; 68:3425-36. [PMID: 21442427 DOI: 10.1007/s00018-011-0638-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 01/08/2011] [Accepted: 02/08/2011] [Indexed: 11/30/2022]
Abstract
The non-receptor tyrosine kinase Src is a critical regulator of cytoskeletal contraction, cell adhesion, and migration. In normal cells, Src activity is stringently controlled by Csk-dependent phosphorylation of Src(Y530), and by Cullin-5-dependent ubiquitinylation, which affects active Src(pY419) exclusively, leading to its degradation by the proteosome. Previous work has shown that Src activity is also limited by Cdk5, a proline-directed kinase, which has been shown to phosphorylate Src(S75). Here we show that this phosphorylation promotes the ubiquitin-dependent degradation of Src, thus restricting the availability of active Src. We demonstrate that Src(S75) phosphorylation occurs in vivo in epithelial cells, and like ubiquitinylation, is associated only with active Src. Preventing Cdk5-dependent phosphorylation of Src(S75), by site-specific mutation of S75 or by Cdk5 inhibition or suppression, increases Src(Y419) phosphorylation and kinase activity, resulting in Src-dependent cytoskeletal changes. In transfected cells, ubiquitinylation of Src(S75A) is about 35% that of wild-type Src-V5, and its half-life is approximately 2.5-fold greater. Cdk5 suppression leads to a comparable decrease in the ubiquitinylation of endogenous Src and a similar increase in Src stability. Together, these findings demonstrate that Cdk5-dependent phosphorylation of Src(S75) is a physiologically significant mechanism of regulating intracellular Src activity.
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Jensen RL, Gilliespie D, Ajewung N, Faure R, Kamnasaran D, Ajewung N, Poirier D, Kamnasaran D, Tamura K, Wakimoto H, Rabkin SD, Martuza RL, Shah K, Hashizume R, Aoki Y, Serwer LP, Drummond D, Noble C, Park J, Bankiewicz K, James DC, Gupta N, Agerholm-Larsen B, Iversen HK, Jensen KS, Moller J, Ibsen P, Mahmood F, Gehl J, Corem E, Ram Z, Daniels D, Last D, Shneor R, Salomon S, Perlstein B, Margel S, Mardor Y, Charest G, Fortin D, Mathieu D, Sanche L, Paquette B, Li HF, Hashizume R, Aoki Y, Hariono S, Dasgupta T, Kim JS, Haas-Kogan D, Weiss WA, Gupta N, James CD, Waldman T, Nicolaides T, Ozawa T, Rao S, Sun H, Ng C, De La Torre J, Santos R, Prados M, James CD, Butowski N, Michaud K, Solomon DA, Li HF, Kim JS, Prados MD, Ozawa T, Waldman T, James CD, Pandya H, Gibo D, Debinski W, Vinchon-Petit S, Jarnet D, Jadaud E, Feuvret L, Garcion E, Menei P, Chen R, Yu JC, Liu C, Jaffer ZM, Chabala JC, Winssinger N, Rubenstein AE, Emdad L, Kothari H, Qadeer Z, Binello E, Germano I, Hirschberg H, Baek SK, Kwon YJ, Sun CH, Li SC, Madsen S, Debinski W, Liu T, Wang SW, Gibo DM, Fan QW, Cheng C, Hackett C, Feldman M, Houseman BT, Houseman BT, Nicolaides T, James CD, Haas-Kogan D, Oakes SA, Debnath J, Shokat KM, Weiss WA, Sai K, Chen F, Qiu Z, Mou Y, Zhang X, Yang Q, Chen Z, Patel TR, Zhou J, Piepmeier JM, Saltzman WM, Banerjee S, Kaul A, Gianino SM, Christians U, Gutmann DH, Wu J, Shen R, Puduvalli V, Koul D, Alfred Yung WK, Yun J, Sonabend A, Stuart M, Yanagihara T, Dashnaw S, Brown T, McCormick P, Romanov A, Sebastian M, Canoll P, Bruce JN, Piao L, Joshi K, Lee RJ, Nakano I, Madsen SJ, Chou CC, Blickenstaff JW, Sun CH, Zhou YH, Hirschberg H, Tome CML, Wykosky J, Palma E, Debinski W, Nduom E, Machaidze R, Kaluzova M, Wang Y, Nie S, Hadjipanayis C, Saito R, Nakamura T, Sonoda Y, Kumabe T, Tominaga T, Lun X, Zemp F, Zhou H, Stechishin O, Kelly JJ, Weiss S, Hamilton MG, Cairncross G, Rabinovich BA, Bell J, McFadden G, Senger DL, Forsyth PA, Kang P, Jane EP, Premkumar DR, Pollack IF, Yoo JY, Haseley A, Bratasz A, Powell K, Chiocca EA, Kaur B, Johns TG, Ferruzzi P, Mennillo F, De Rosa A, Rossi M, Giordano C, Magrini R, Benedetti G, Pericot GL, Magnoni L, Mori E, Thomas R, Tunici P, Bakker A, Yoo JY, Pradarelli J, Kaka A, Alvarez-Breckenridge C, Pan Q, Teknos T, Chiocca EA, Kaur B, Cen L, Ostrem JL, Schroeder MA, Mladek AC, Fink SR, Jenkins RB, Sarkaria JN, Madhankumar AB, Slagle-Webb B, Park A, Pang M, Klinger M, Harbaugh KS, Sheehan JM, Connor JR, Chen TC, Wang W, Hofman FM, Serwer LP, Michaud K, Drummond DC, Noble CO, Park JW, Ozawa T, James CD, Serwer LP, Noble CO, Michaud K, Drummond DC, Ozawa T, Zhou Y, Marks JD, Bankiewicz K, Park JW, James CD, Alonso MM, Gomez-Manzano C, Cortes-Santiago N, Roche FP, Fueyo J, Johannessen TCA, Grudic A, Tysnes BB, Nigro J, Bjerkvig R, Joshi AD, Parsons W, Velculescu VE, Riggins GJ, Bindra RS, Jasin M, Powell SN, Fu J, Koul D, Shen RJ, Colman H, Lang FF, Jensen MR, Alfred Yung WK, Friedman GK, Haas M, Cassady KA, Gillespie GY, Nguyen V, Murphy LT, Beauchamp AS, Hollingsworth CK, Debinski W, Mintz A, Pandya H, Garg S, Gibo D, Kridel S, Debinski W, Conrad CA, Madden T, Ji Y, Colman H, Priebe W, Seleverstov O, Purow BW, Grant GA, Wilson C, Campbell M, Humphries P, Li S, Li J, Johnson A, Bigner D, Dewhirst M, Sarkaria JN, Cen L, Pokorny JL, Mladek AC, Kitange GJ, Schroeder MA, Carlson BL, Suphangul M, Petro B, Mukhtar L, Baig MS, Villano J, Mahmud N, Keir ST, Reardon DA, Watson M, Shore GC, Bigner DD, Friedman HS, Keir ST, Gururangan S, Reardon DA, Bigner DD, Friedman HS. Pre-clinical Experimental Therapeutics and Pharmacology. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s13] [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
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Calitchi É, Pan Q, Diana C, Belkacemi Y, Lagrange J. Rôle de la radiothérapie postopératoire dans le traitement des tumeurs de Merkel : expérience de l’hôpital Henri-Mondor, à propos de 21 cas. Cancer Radiother 2010. [DOI: 10.1016/j.canrad.2010.07.612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hu X, Xu Y, Sun J, Liu Z, Pan Q, Sun F, Yan Z, Li L. 235 Schisandrin B prevents doxorubicin-induced chronic cardiotoxicity and enhances its anticancer activity in vivo. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71042-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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109
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Zhu YZ, Zhu R, Fan J, Pan Q, Li H, Chen Q, Zhu HG. Hepatitis B virus X protein induces hypermethylation of p16(INK4A) promoter via DNA methyltransferases in the early stage of HBV-associated hepatocarcinogenesis. J Viral Hepat 2010; 17:98-107. [PMID: 19732323 DOI: 10.1111/j.1365-2893.2009.01156.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The aim of the present study was to authenticate the involvement of DNA methyltransferases (DNMTs) and methyl-CpG binding domain protein 2 (MBD2) in the process of HBx induced p16(INK4A) promoter hypermethylation in HBV-related hepatocellular carcinoma (HCC) and their corresponding noncancerous liver tissues. Eighty-eight fresh tissue specimens of surgically resected HBV-associated HCC and their corresponding noncancerous liver tissues were studied. The methylation status of the p16(INK4A) promoter was determined by methylation-specific polymerase chain reaction (MSP). Reverse transcription and real-time polymerase chain reaction (RT-PCR) showed the expression of DNMTs, MBD2 and HBx. Western blot and immunohistochemistry were used for the protein analysis of HBx, DNMT1, DNMT3A and P16. Tissue HBV-DNA levels were determined by RT-PCR. HBV genotype was examined by nested PCR and restriction fragment length polymorphism (RFLP). In the corresponding noncancerous liver tissues, higher HBx expression was associated with the hypermethylation of the p16(INK4A) promoter. HBx was positively correlated with the DNMT1 and DNMT3A at both the mRNA and protein level. Furthermore, HBx, DNMT1 and DNMT3A protein expression were negatively correlated with p16 protein expression. In HCC tissues, HBx was positively correlated with DNMT1 and DNMT3A at both mRNA and protein level, but HBx expression did not correlate with hypermethylation of the p16(INK4A) promoter or p16 protein expression. The methylation status of the p16(INK4A) promoter did not correlate with clinicopathological characteristics. DNMT1 and DNMT3A may play important roles in the process of HBx inducing hypermethylation of the p16(INK4A) promoter in the early stages of HBV-associated HCC. HBx-DNMTs-p16(INK4A) promoter hypermethylation may constitute a mechanism for tumorigenesis during HBV-associated hepatocarcinogenesis.
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Wu H, Fan MM, Li CF, Peng M, Sheng LJ, Pan Q, Song GW. Kinetic studies on the degradation of crystal violet by the Fenton oxidation process. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2010; 62:1-7. [PMID: 20595746 DOI: 10.2166/wst.2010.170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The degradation of dye crystal violet (CV) by Fenton oxidation process was investigated. The UV-Vis spectrogram has shown that CV can be degraded effectively by Fenton oxidation process. Different system variables namely initial H(2)O(2) concentration, initial Fe(2 + ) concentration and reaction temperature, which have effect on the degradation of CV by Fenton oxidation process, have been studied systematically. The degradation kinetics of CV was also elucidated based on the experimental data. The degradation of CV obeys the first-order reaction kinetics. The kinetic model can be described as k=1.5 exp(-(7.5)/(RT))[H(2)O(2)](0)(0.8718)[Fe(2+)](0)(0.5062). According to the IR spectrogram, it is concluded that the benzene ring of crystal violet has been destroyed by Fenton oxidation. The result will be useful in treating dyeing wastewater containing CV by Fenton oxidation process.
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Xu Q, Li X, Wang J, Jiang H, Zhang S, Lei L, Shen L, Xia K, Pan Q, Long Z, Tang B. Mutation Analysis of the TATA box-binding protein (TBP) gene in Chinese Han patients with spinocerebellar ataxia. J Clin Neurosci 2009; 16:1374-5. [DOI: 10.1016/j.jocn.2009.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 04/08/2009] [Accepted: 05/08/2009] [Indexed: 10/20/2022]
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Pan Q, Yang XH, Cheng YX. Angiotensin II stimulates MCP-1 production in rat glomerular endothelial cells via NAD(P)H oxidase-dependent nuclear factor-kappa B signaling. Braz J Med Biol Res 2009; 42:531-6. [PMID: 19448902 DOI: 10.1590/s0100-879x2009000600009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 03/16/2009] [Indexed: 12/22/2022] Open
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113
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Pan Q, Xu WJ, Tang YQ, Yang Y, Ma J, Zhang ZM, Liu Y, Zhou QS, Peng LY, Li PJ, Liang DD, Chen HZ, Li J, Xiao JJ, Zhang J, Chen YH. Unique histological features of the left atrial posterior wall. J Int Med Res 2009; 37:392-9. [PMID: 19383233 DOI: 10.1177/147323000903700214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The left atrial posterior wall (LAPW) plays a critical role in atrial fibrillation, but the underlying mechanism remains unclear. In the present study, we sought to characterize the histological features of the LAPW. Different atrial regions were dissected from hearts of normal Sprague-Dawley rats and humans. Haematoxylin/eosin and van Gieson staining were used to analyse atrial cardiomyocyte arrangement and collagen distribution, respectively. Intercellular junctions were evaluated by transmission electron microscopy. In contrast with other atrial regions, the LAPW exhibited more disorganized cardiomyocytes, larger intercellular spaces and variable myocardial fibre arrangement. The proportion of collagen was significantly higher in the LAPW than in other atrial regions. Interestingly, desmosomes were sparse along with intercellular gaps in the LAPW. In summary, distinct disarrangement of cardiomyocytes and an abundance of collagen exist in the LAPW. The sparsity of desmosomes in the LAPW may be related to the heterogeneous distribution and separation of atrial myocytes.
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Liu XP, Ling J, Xiong H, Shi XL, Sun X, Pan Q, Hu ZM, Wu LQ, Liang DS, Long ZG, Dai HP, Xia JH, Xia K. Mutation L437P in the 2B domain of keratin 1 causes diffuse palmoplantar keratoderma in a Chinese pedigree. J Eur Acad Dermatol Venereol 2009; 23:1079-82. [PMID: 19470048 DOI: 10.1111/j.1468-3083.2009.03175.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Diffuse palmoplantar keratoderma (DPPK) is an autosomal dominant genodermatosis characterized by uniform hyperkeratosis of the palm and sole epidermis. This disorder can be caused by mutations in the genes keratin 1, keratin 9, keratin 16, desmoglein 1 and plakoglobin. Here we present a DPPK Chinese pedigree and identify the aetiology as a novel missense mutation, L437P, located in a highly conserved helix motif in domain 2B of KRT1. Functional analysis shows that overexpression of the L437P mutant in cultured cells leads to abnormal intermediate filament networks and filament aggregation. This gain-of-function mutation highlights the role of domain 2B in mediating filament assembly.
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Li HY, Li N, Jiang H, Shen L, Guo JF, Zhang RX, Xia K, Pan Q, Zi XH, Tang BS. A novel genetic locus for benign familial infantile seizures maps to chromosome 1p36.12-p35.1. Clin Genet 2008; 74:490-2. [PMID: 18811698 DOI: 10.1111/j.1399-0004.2008.01092.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Xia J, Zheng D, Tang D, Dai H, Pan Q, Long Z, Liao X. Cloning, mapping and mutation analysis of human geneGJB5 encoding gap junction protein beta-5. SCIENCE IN CHINA. SERIES C, LIFE SCIENCES 2008; 44:92-8. [PMID: 18763093 DOI: 10.1007/bf02882077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2000] [Indexed: 10/22/2022]
Abstract
By homologous EST searching and nested PCR a new human geneGJB5 encoding gap junction protein beta-5 was identified.GJB5 was genetically mapped to human chromosome 1p33-p35 by FISH. RT-PCR revealed that it was expressed in skin, placenta and fetal skin. DNA sequencing ofGJB5 was carried out in 142 patients with sensorineural hearing impairment and probands of 36 families with genetic diseases, including erythrokeratodermia (5 families), Charcot-Marie-Tooth disease (13), ptosis (4), and retinitis pigmentosa and deafness (14). Two missense mutations (686A-->G, H229R; 25C-->T, L9F) were detected in two sensorineural hearing impairment families. A heterologous deletion of 18 bp within intron was found in 3 families with heredity hearing impairment, and in one of the 3 families, a missense mutation (R265P) was identified also. But the deletion and missense mutation seemed not segregating with hearing impairment in the family. No abnormal mRNA or mRNA expression was detected in deletion carriers by RT-PCR analysis in skin tissue. Mutation analysis in 199 unaffected individuals revealed that two of them were carriers with the same 18 bp deletion.
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Wang F, Shen X, Xu S, Liu Y, Ma L, Zhao Q, Fu D, Pan Q, Feng S, Li X. Negative words on surgical wards result in therapeutic failure of patient-controlled analgesia and further release of cortisol after abdominal surgeries. Minerva Anestesiol 2008; 74:353-365. [PMID: 18612266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND The perception of pain is germane to the environmental stimuli. Nurses on surgical wards are the main contributor in influencing patients' psychophysiological fettle. The aim of the study was to investigate the effect of different words, negative or positive, from nurses on postoperative pain therapy with patient-controlled analgesia (PCA). METHODS 1500 ASA I-II patients, who underwent abdominal hysterectomy, were screened and 771 were randomized into one of four groups. In the no words group (NW, N.=35), no words was delivered. The positive (PW, N.=248), partially negative (NW1, N.=241) and totally negative (NW2, N.=247) groups received corresponding words when treating with morphine PCA, the words were given singly at the 3(rd), 6(th), 12(th), 18(th) h and repeatedly at the 3(rd) and 6(th) h, and each group was redivided into six subgroups according to varying time points. Pain intensity, morphine consumption, side effects, overall sedation and satisfaction scores were recorded and plasma cortisol was tested. RESULTS A total of 614 patients completed the study. Negative words expressed significant influence on pain therapy at the 3(rd) and 6(th) h after surgeries (P<0.01), and this effect was more convenient in repeatedly treated patients (P<0.001). Positive and the 12(th) and 18(th) h negative words displayed little role in pain management. Morphine consumption, side effects, satisfaction and cortisol level converted with the change of the pain intensity. No intergroup differences were observed in patients' overall conditions. CONCLUSION Negative words on surgical wards influenced postoperative pain management at the earlier period of time after abdominal surgeries associated with the HPA axis activation.
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Shi JY, Zhang SW, Pan Q, Zhou GP. Using pseudo amino acid composition to predict protein subcellular location: approached with amino acid composition distribution. Amino Acids 2008; 35:321-7. [PMID: 18209947 DOI: 10.1007/s00726-007-0623-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Accepted: 10/15/2007] [Indexed: 11/25/2022]
Abstract
In the Post Genome Age, there is an urgent need to develop the reliable and effective computational methods to predict the subcellular localization for the explosion of newly found proteins. Here, a novel method of pseudo amino acid (PseAA) composition, the so-called "amino acid composition distribution" (AACD), is introduced. First, a protein sequence is divided equally into multiple segments. Then, amino acid composition of each segment is calculated in series. After that, each protein sequence can be represented by a feature vector. Finally, the feature vectors of all sequences thus obtained are further input into the multi-class support vector machines to predict the subcellular localization. The results show that AACD is quite effective in representing protein sequences for the purpose of predicting protein subcellular localization.
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Luo X, Toloubeydokhti T, Pan Q, Ripps B, Chegini N. The expression of specific genes and their predicated micro-RNA (miRNA) in human endometrium during the window of embryo implantation. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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120
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Pan Q, Luo X, Toloubeydokhti T, Chegini N. The expression profile of micro-RNA in eutopic and ectopic endometrium and the influence of ovarian steroids on their expression in endometrial cells. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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121
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Luo X, Pan Q, Chegini N. Profile of differentially expressed genes and their predicated micro-RNA (miRNA) in leiomyomas and myometrium. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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122
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Fu JF, Shi JY, Zhao WL, Li G, Pan Q, Li JM, Hu J, Shen ZX, Jin J, Chen FY, Chen SJ. MassARRAY assay: a more accurate method for JAK2V617F mutation detection in Chinese patients with myeloproliferative disorders. Leukemia 2007; 22:660-3. [PMID: 17728780 DOI: 10.1038/sj.leu.2404931] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
MESH Headings
- Biomarkers, Tumor/genetics
- China/epidemiology
- Female
- Gene Frequency
- Genotype
- Humans
- Hypereosinophilic Syndrome/enzymology
- Hypereosinophilic Syndrome/epidemiology
- Hypereosinophilic Syndrome/genetics
- Janus Kinase 2/genetics
- Leukemia, Myeloid/enzymology
- Leukemia, Myeloid/epidemiology
- Leukemia, Myeloid/genetics
- Male
- Mutation, Missense
- Myeloproliferative Disorders/enzymology
- Myeloproliferative Disorders/epidemiology
- Myeloproliferative Disorders/genetics
- Oligonucleotide Array Sequence Analysis/methods
- Point Mutation
- Polymerase Chain Reaction/methods
- Polymorphism, Restriction Fragment Length
- Polymorphism, Single Nucleotide
- Sensitivity and Specificity
- Sequence Analysis, DNA
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/methods
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Zhang SW, Zhang YL, Pan Q, Cheng YM, Chou KC. Estimating residue evolutionary conservation by introducing von Neumann entropy and a novel gap-treating approach. Amino Acids 2007; 35:495-501. [PMID: 17710364 PMCID: PMC7088136 DOI: 10.1007/s00726-007-0586-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2007] [Accepted: 02/23/2007] [Indexed: 11/24/2022]
Abstract
Evolutionary conservation derived from a multiple sequence alignment is a powerful indicator of the functional significance of a residue, and it can help to predict active sites, ligand-binding sites, and protein interaction interfaces. The results of the existing algorithms in identifying the residue’s conservation strongly depend on the sequence alignment, making the results highly variable. Here, by introducing the amino acid similarity matrix, we propose a novel gap-treating approach by combining the evolutionary information and von Neumann entropies to compute the residue conservation scores. It is indicated through a series of tested results that the new approach is quite encouraging and promising and may become a useful tool in complementing the existing methods.
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Zhang G, Pan Q, Weintraub A. Identification of Bacteroides fragilisby a modified immuno polymerase chain reaction (mIPCR), using a specific monoclonal antibody. Anaerobe 2007; 4:189-96. [PMID: 16887641 DOI: 10.1006/anae.1998.0162] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/1998] [Accepted: 07/16/1998] [Indexed: 11/22/2022]
Abstract
Bacteroides fragilis is the anaerobic species most commonly isolated from human clinical specimens, and is resistant to many antimicrobial agents. A monoclonal antibody, mAb4H8 (IgG3), reacting with a specific epitope in the lipopolysaccharide (LPS) isolated from most of the B. fragilis strains, was produced and employed with modified Immuno Polymerase Chain Reaction (mIPCR) for identification of B. fragilis with a detection limit of 10(4) cfu/mL bacterial suspension. A number of bacterial strains were examined, including B. fragilis, Bacteroides spp. other than B. fragilis and other genera. All the B. fragilis strains with the immunodominant (beta1,6-linked D-galactosyl chain) epitope were positive. None of the other strains showed the positive reaction. The results indicate that mIPCR assay with mAb4H8 has a high specificity and high sensitivity.
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Liu YB, Jia W, Yao Z, Pan Q, Takaishi Y, Duan HQ. Two eudesmane sesquiterpenes from Laggera pterodonta. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2007; 9:233-7. [PMID: 17566915 DOI: 10.1080/10286020600603924] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Two new eudesmane sesquiterpenes, 2alpha-hydroxy pterodontic acid (1) and pterodolide [3alpha-(2-methyl-2,3-epoxy)-butyric-4alpha-acetoxy-8beta-ethoxy eudesma-7(11)-en-8alpha,12-olide (2), along with five known compounds (3-7) were isolated from the aerial parts of Laggera pterodonta. Their structures were elucidated on the basis of spectroscopic methods. The immunosuppressive activity of the isolated compounds was investigated.
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