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Ji-min S, Xue-yan L, Zhong-lin C, Xiao-hong G, Xue Z, Zhen-zhen X. Degradation of macromolecular tannic acid by O3/H2O2. Water Sci Technol 2008; 57:2043-2050. [PMID: 18587196 DOI: 10.2166/wst.2008.609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Tannic acid, being polyhydroxyl, is a macromolecule natural organic matter. The efficiency and mechanism of degradation of tannic acid by O3 and O3/H2O2 was studied. The results showed that the addition of H2O2 had no obvious improvement on the ozonation efficiency of tannin. It was observed that the addition of H2O2 decreased the removal efficiency of TOC by 10%. The relative intensity of .OH generated in the O3-H2O2 system was detected by electronic spin resonance (ESR) and it was found that tannin consumed the .OH radicals, which may be associated with the polyhydroxyl structure of tannin. Derived with PFBBr and analysed by GC-ECD, the by-products of tannin ozonation were found to be aldehydes such as acetaldehyde, glyoxal and methyl glyoxal. Analysis with an ion chromatogram showed that the final products of tannin were oxalic acid, ketomalonic acid and oxalic acid, which consisted of 35% of TOC in both systems.
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Affiliation(s)
- S Ji-min
- State Key Lab of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China.
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102
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Xue Z, Zhang L, Liu Y, Gunst SJ, Tepper RS. Chronic inflation of ferret lungs with CPAP reduces airway smooth muscle contractility in vivo and in vitro. J Appl Physiol (1985) 2007; 104:610-5. [PMID: 18096756 DOI: 10.1152/japplphysiol.00241.2007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The mechanical stress imposed on the lungs during breathing is an important modulator of airway responsiveness in vivo. Our recent study demonstrated that continuous positive airway pressure applied to the lungs of nonanesthetized, tracheotomized rabbits for 4 days decreased lower respiratory system responsiveness to challenge with ACh (Xue Z, Zhang L, Ramchandani R, Liu Y, Antony VB, Gunst SJ, Tepper RS. J. Appl Physiol 99: 677-682, 2005). In addition, airway segments excised from the lungs of these animals and studied in vitro exhibited reduced contractility. However, the mechanism for this reduction in contractility was not determined. The stress-induced decrease in airway responsiveness could have resulted from alterations in the excitation-contraction coupling mechanisms of the smooth muscle cells, or it might reflect changes in the structure and/or composition of the airway wall tissues. In the present study, we assessed the effect of prolonged chronic stress of the lungs in vivo on airway smooth muscle force generation, myosin light chain phosphorylation, and airway wall structure. To enhance the potential development of stress-induced structural changes, we applied mechanical stress for a prolonged period of time of 2-3 wk. Our results demonstrate a direct connection between the decreased airway responsiveness caused by chronic mechanical stress of the lungs in vivo and a persistent decrease in contractile protein activation in the airway smooth muscle isolated from those lungs. The chronic stress also caused an increase in airway size but no detectable changes in the composition of the airway wall.
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Affiliation(s)
- Z Xue
- Department of Pediatrics, HB Wells Center for Pediatric Research, Indianapolis, IN, USA
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103
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Schroder R, Goudeau B, Simon MC, Fischer D, Eggermann T, Clemen CS, Li Z, Reimann J, Xue Z, Rudnik-Schoneborn S, Zerres K, van der Ven PFM, Furst DO, Kunz WS, Vicart P. On noxious desmin: functional effects of a novel heterozygous desmin insertion mutation on the extrasarcomeric desmin cytoskeleton and mitochondria. Hum Mol Genet 2007. [DOI: 10.1093/hmg/ddm269] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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104
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Warren L, Gibson R, Ishihara L, Elango R, Xue Z, Akkari A, Ragone L, Pahwa R, Jankovic J, Nance M, Freeman A, Watts RL, Hentati F. A founding LRRK2 haplotype shared by Tunisian, US, European and Middle Eastern families with Parkinson's disease. Parkinsonism Relat Disord 2007; 14:77-80. [PMID: 17433753 DOI: 10.1016/j.parkreldis.2007.02.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2006] [Revised: 01/29/2007] [Accepted: 02/05/2007] [Indexed: 01/09/2023]
Abstract
The Leucine-rich repeat kinase 2 (LRRK2) gene has been identified as a disease susceptibility gene for Parkinson's disease (PD), with G2019 (6055G>A) being the most frequent mutation. This mutation was present in 42% (38/91) of Tunisian families and 2% (1/39) of US families we have studied. A founding haplotype was identified in our data and it is shared by families from Tunisia, US, European and Middle Eastern countries. The most recent common founder of the mutation was dated to 2600 (95% CI: 1950-3850) years ago although additional studies are warranted to ensure an accurate age estimate for this mutation.
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Affiliation(s)
- L Warren
- Research and Development, GlaxoSmithKline Pharmaceuticals, Research Triangle Park, NC 27709, USA.
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105
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Okabe T, Buch A, Javaid A, Steinberg D, Pinto Slottow T, Roy P, Hong Y, Smith K, Torguson R, Gevorkian N, Xue Z, Satler L, Kent K, Pichard A, Waksman R. The residual persistent plaque burden predicts the restenosis of drug-eluting stents. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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106
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Okabe T, Mintz G, Buch A, Roy P, Hong Y, Smith K, Torguson R, Gevorkian N, Xue Z, Satler L, Kent K, Pichard A, Weissman N, Waksman R. The predictive factors of stent thrombosis in drug-eluting stent era. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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107
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Pinto Slottow T, Steinberg D, Roy P, Javaid A, Buch A, Okabe T, Torguson R, Smith K, Xue Z, Pichard A, Satler L, Suddath W, Kent K, Waksman R. Does progression of coronary artery disease differ in patients with stable and acute coronary syndrome? Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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108
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Buch A, Singh S, Smith K, Torguson R, Gevorkian N, Xue Z, Fournadjieva J, Satler L, Kent K, Pichard A, Waksman R. Measures of aspirin resistance and clopidogrel resistance do not correlate with postpercutaneous coronary intervention markers of myonecrosis. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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109
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Torguson R, Roy P, Xue Z, Smith K, Pinto Slottow T, Satler L, Kent K, Suddath W, Pichard A, Weissman N, Waksman R. The importance of IVUS guidance during contemporary percutaneous coronary intervention with drug-eluting stents for the prevention of stent thrombosis. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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110
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Roy P, Raya V, Okabe T, Pinto Slottow T, Steinberg D, Smith K, Xue Z, Gevorkian N, Satler L, Kent K, Suddath W, Pichard A, Waksman R. Clinical correlates of restenosis following coronary implantation of drug-eluting stents. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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111
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Garg S, Smith K, Xue Z, Torguson R, Steinberg D, Pinto Slottow T, Pichard A, Suddath W, Satler L, Kent K, Waksman R. What is the best treatment strategy for patients presenting with drug-eluting stent restenosis? Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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112
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Buch A, Singh S, Roy P, Javaid A, Steinberg D, Pinto Slottow T, Okabe T, Smith K, George C, Xue Z, Gevorkian N, Torguson R, Fournadjieva J, Satler L, Kent K, Suddath W, Pichard A, Waksman R. Clinical outcomes after implantation of 2.5-mm-diameter sirolimus vs. 2.5-mm-diameter paclitaxel-eluting stents in unselected patients with coronary artery disease. Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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113
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Steinberg D, Mishra S, Javaid A, Pinto Slottow T, Buch A, Roy P, Okabe T, Smith K, Xue Z, Gevorkian N, Suddath W, Kent K, Satler L, Pichard A, Waksman R. Are drug-eluting stents superior to bare metal stents in large coronary arteries? Cardiovascular Revascularization Medicine 2007. [DOI: 10.1016/j.carrev.2007.03.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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114
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Liu X, Liu M, Xue Z, Pan Q, Wu L, Long Z, Xia K, Liang D, Xia J. Non-viral ex vivo transduction of human hepatocyte cells to express factor VIII using a human ribosomal DNA-targeting vector. J Thromb Haemost 2007; 5:347-51. [PMID: 17155951 DOI: 10.1111/j.1538-7836.2007.02355.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND In gene therapy, one of the most important issues is the choice of the vectors. pHrneo is a human-derived vector previously constructed by our group, which can target a foreign gene into a human ribosomal DNA (hrDNA) locus. METHODS AND RESULTS In this study, we inserted an expression cassette of reconstructive hFVIII (hFVIII-BDDAK39) to pHrneo to construct a targeting vector: pHrneo-BDDAK39. Through electroporation of pHrneo-BDDAK39 into HL7702 cells (human hepatocyte), we identified the homologous recombinants using polymerase chain reaction, and tested the expression of hFVIII-BDDAK39 located at the hrDNA locus. The hFVIII-BDDAK39 was successfully targeted into the hrDNA locus of HL7702 by pHrneo-BDDAK39, and the efficiency of site-specific integration was 1.1 x 10(-5). The hFVIII-BDDAK39 at the hrDNA locus of HL7702 was found to be able to express efficiently (4.3 +/- 0.9 ng 10(-6) cells 24 h(-1)). CONCLUSION It has been indicated that the targeting vector pHrneo-BDDAK39 can be used in gene therapy for hemophilia A.
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Affiliation(s)
- X Liu
- National Laboratory of Medical Genetics of China, Xiangya Hospital, Central South University, Changsha, China
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115
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Uyama N, Zhao L, Van Rossen E, Hirako Y, Reynaert H, Adams DH, Xue Z, Li Z, Robson R, Pekny M, Geerts A. Hepatic stellate cells express synemin, a protein bridging intermediate filaments to focal adhesions. Gut 2006; 55:1276-89. [PMID: 16484507 PMCID: PMC1860035 DOI: 10.1136/gut.2005.078865] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS In the liver, stellate cells play several important (patho)physiological roles. They express a broad but variable spectrum of intermediate filament (IF) proteins. The aim of this study was to investigate the expression and functions of the intermediate filament protein synemin in hepatic stellate cells (HSCs). METHODS In isolated and cultured rat HSCs, synemin expression was examined by quantitative reverse transcriptase polymerase chain reaction, western blotting, and immunocytochemistry. Protein-protein interaction between synemin and possible binding partners was investigated by co-immunoprecipitation and confocal microscopy. RESULTS Expression of synemin was significantly downregulated with increased culture time. In 1-day cultured HSCs, synemin associated with other IF proteins (GFAP, desmin, and vimentin), and with the focal adhesion proteins vinculin and talin, but not with alpha-actinin or paxillin. Synemin IF and focal adhesion proteins co-localised in long slender processes, but not in the lamellipodia. In human and rat liver tissue, the presence of synemin was investigated by immunohistochemistry. In normal rat and human livers, synemin immunoreactivity was found in HSCs, smooth muscle cells of hepatic arterioles, and nerve bundles in portal tracts, but not in portal fibroblasts. In CCl4-intoxicated rat livers and in human cirrhotic livers, immunoreactivity for synemin in the parenchymal tissue was decreased. Thus synemin was expressed in quiescent HSCs but not in portal fibroblasts; and synemin expression decreased with HSC activation in vivo during chronic liver damage and with HSC activation in culture. CONCLUSIONS Synemin forms heteropolymeric filaments with type-III IF proteins and acts as a bridging protein between IFs and a specific type of focal adhesions.
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Affiliation(s)
- N Uyama
- Laboratory for Cell Biology, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussel-Jette, Belgium
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116
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Buch A, Waksman R, Kuchulakanti P, Chu W, Javaid A, Torguson R, Smith K, Gevorkian N, Xue Z, Fournadjieva J, Satler L, Kent K, Pichard A, Lindsay J. Sirolimus- versus paclitaxel-eluting stent experience in an unselected population with coronary artery disease (C- versus T-REWARD registries). Cardiovascular Revascularization Medicine 2006. [DOI: 10.1016/j.carrev.2006.03.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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117
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Javaid A, Pichard A, Satler L, Kent K, Gevorkian N, Buch A, Xue Z, Waksman R. Does CK-MB elevation following PCI with drug-eluting stents impact late clinical outcome? Cardiovascular Revascularization Medicine 2006. [DOI: 10.1016/j.carrev.2006.03.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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118
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Abstract
The enaminones represent potentially useful agents for the clinical treatment in generalized tonic-clonic seizures (Epilepsia, 1993, 34(6), 1141-1145, Biopharm. Drug Disp. 2003, 397-407). A regression analysis was performed to provide a quantitative structure-activity relationship (QSAR) correlation model for prediction of activity for the anticonvulsant enaminones. Molecular modeling was performed to determine the molecular confluence of the Unverferth model (J. Med. Chem. 1998, 41, 63-73) to the enaminones. Conclusions related to the sodium channel model were assessed.
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Affiliation(s)
- T L Wilson
- Department of Pharmaceutical Sciences, Howard University, School of Pharmacy, Washington, DC 20059, USA
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119
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120
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Tepper RS, Ramchandani R, Argay E, Zhang L, Xue Z, Liu Y, Gunst SJ. Chronic strain alters the passive and contractile properties of rabbit airways. J Appl Physiol (1985) 2005; 98:1949-54. [PMID: 15677739 DOI: 10.1152/japplphysiol.00952.2004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Pathophysiological conditions of the lung may shift the balance of forces so as to chronically alter the amount of strain imposed on the airways. This chronic strain could result in changes in the structure and/or function of the airways that affect its physiological properties. We evaluated the effects of imposing physiological levels of chronic mechanical strain on the passive and active physiological properties of intraparenchymal rabbit airways. Isolated bronchial segments were cultured for 48 h at transmural pressures of 0 cmH2O (No Strain) or 7 cmH2O (Strain). Effects of strain on small parenchymal airways were evaluated in lung tissue slices cultured under conditions of No Strain or ∼50% increased in diameter (Strain). Chronic strain resulted in a higher passive compliance of the bronchial segments and larger airway lumen size. In addition, bronchi not subjected to chronic Strain were more responsive to ACh than bronchi subjected to chronic Strain, and airways in lung slices subjected to No Strain narrowed more in response to ACh than airways in lung slices subjected to Strain. The greatest effects of chronic strain occurred in the smallest sized airways. Our results suggest that chronic distension of the airways has physiologically important effects on their passive and active properties, which are most prominent in the smaller, more peripheral airways.
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Affiliation(s)
- R S Tepper
- Department of Pediatrics, HB Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA.
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121
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Xue Z, Zhang L, Ramchandani R, Liu Y, Antony VB, Gunst SJ, Tepper RS. Respiratory system responsiveness in rabbits in vivo is reduced by prolonged continuous positive airway pressure. J Appl Physiol (1985) 2005; 99:677-82. [PMID: 15817724 DOI: 10.1152/japplphysiol.00165.2005] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Active, nonanesthetized, tracheotomized rabbits were subjected to continuous positive airway pressure (CPAP) for 4 days to determine the effects of chronic mechanical strain on lung and airway function. Rabbits were maintained for 4 days at a CPAP of 6 cmH(2)O (high CPAP), at a CPAP of 0 cmH(2)O (low CPAP), or without tracheostomy (no CPAP). After treatment with CPAP, changes in respiratory resistance in response to increasing concentrations of inhaled ACh were measured during mechanical ventilation to evaluate respiratory system responsiveness in vivo. Intraparenchymal bronchial segments were isolated from the lungs of all animals to evaluate airway smooth muscle responsiveness and bronchial compliance in vitro. Rabbits maintained for 4 days at high CPAP demonstrated significantly lower responsiveness to ACh compared with rabbits that were maintained at low CPAP or with no CPAP. Airways isolated from the lungs of animals subjected to the chronic application of high CPAP were also less responsive to ACh in vitro than the airways isolated from animals subjected to low CPAP or no CPAP. The persistence of the decreased responsiveness in the excised airway tissues suggests that the decreased respiratory system responsiveness observed in vivo results primarily from direct effects on the airways. The results demonstrate that the application of prolonged mechanical strain in vivo can reduce airway reactivity.
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Affiliation(s)
- Z Xue
- James Whitcomb Riley Hospital for Children, Sect. of Pediatric Pulmonology, ROC 4270, 702 Barnhill Drive, Indianapolis, IN 46202, USA
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122
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Fang Y, Macool DJ, Xue Z, Heppard EP, Hainey CF, Tingey SV, Miao GH. Development of a high-throughput yeast two-hybrid screening system to study protein-protein interactions in plants. Mol Genet Genomics 2002; 267:142-53. [PMID: 11976957 DOI: 10.1007/s00438-002-0656-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2001] [Accepted: 02/03/2002] [Indexed: 11/25/2022]
Abstract
We have developed a high-throughput yeast two-hybrid screening system (HTP-YTH) that incorporates yeast gap-repair cloning, multiple positive ( ADE2, HIS3, lacZ) and negative ( URA3-based) selection schemes to reduce the incidence of negative and false positive clones, and automation of laboratory procedures to increase throughput. This HTP-YTH system has been applied to the study of protein-protein interactions that are involved in rice defense signal transduction pathways. More than 100 genes involved in plant defense responses were selected from DuPont's rice expressed sequence tag (EST) databases as baits for HTP-YTH screening. Results from YTH screening of eight of these rice genes are presented in this paper. Not only have we identified known protein-protein interactions, but we have also discovered novel interactions, which may ultimately reveal the regulatory network of host defense signal transduction pathways. We have demonstrated that our HTP-YTH method can be used to map protein-protein interaction networks and signal transduction pathways in any system. In combination with other approaches, such efficient YTH screens can help us systemically to study the functions of known and unknown genes in the genomics era.
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Affiliation(s)
- Y Fang
- E. I. duPont de Nemours and Company, Agricultural Biotechnology - Genomics, Delaware Technology Park, Newark 19714-6104, USA
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123
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Titeux M, Brocheriou V, Xue Z, Gao J, Pellissier JF, Guicheney P, Paulin D, Li Z. Human synemin gene generates splice variants encoding two distinct intermediate filament proteins. Eur J Biochem 2001; 268:6435-49. [PMID: 11737198 DOI: 10.1046/j.0014-2956.2001.02594.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Intermediate filament (IF) proteins are constituents of the cytoskeleton, conferring resistance to mechanical stress, and are encoded by a dispersed multigene family. In man we have identified two isoforms (180 and 150 kDa) of the IF protein synemin. Synemin alpha and beta have a very short N-terminal domain of 10 amino acids and a long C-terminal domain consisting of 1243 amino acids for the alpha isoform and 931 amino acids for the beta isoform. An intronic sequence of the synemin beta isoform is used as a coding sequence for synemin alpha. Both mRNA isoforms (6.5 and 7.5 kb) result from alternative splicing of the same gene, which has been assigned to human chromosome 15q26.3. Analyses by Northern and Western blot revealed that isoform beta is the predominant isoform in striated muscles, whereas both isoforms (alpha and beta) are present in almost equal quantities in smooth muscles. Co-transfection and immunolabeling experiments indicate that both synemin isoforms are incorporated with desmin to form heteropolymeric IFs. Furthermore synemin and desmin are found aggregated together in certain pathological situations.
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Affiliation(s)
- M Titeux
- Biologie Moléculaire de la Différenciation, Université Denis-Diderot-Paris 7, France
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124
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Burleigh M, Dai S, Barnes C, Xue Z. ENHANCED IONIC RECOGNITION BY A FUNCTIONALIZED MESOPOROUS SOL-GEL: SYNTHESIS AND METAL ION SELECTIVITY OF DIAMINOETHANE DERIVATIVE. SEP SCI TECHNOL 2001. [DOI: 10.1081/ss-100107910] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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125
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Allain LR, Canada TA, Xue Z. Optical sensors and the salt effect: a dual-transducer approach to acidity determination in a salt-containing concentrated strong acid. Anal Chem 2001; 73:4592-8. [PMID: 11605835 DOI: 10.1021/ac010166y] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A dual-transducer approach has been developed to decompose the optical signals of acid sensors in salt-containing concentrated acid solutions and to give acid and salt concentrations in concentrated LiCl-HCl, CaCl2-HCl, and AICl3-HCl solutions, respectively. The optical acid sensors in this approach are films of porous sol-gel SiO2 or SiO2-Nafion composite doped with low-pKa indicators. A novel linear relationship (dA/dCsalt)cCacid = beta x (dA0/dCacid)Csalt = 0 (A = absorbance of the sensor in a salt-containing HCl solution; A0 = absorbance of the sensor in a salt-free acid solution) was found, and the current approach is based on a set of nonlinear equations derived from this relationship.
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Affiliation(s)
- L R Allain
- Department of Chemistry, The University of Tennessee, Knoxville, 37996-1600, USA
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126
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Liu X, Wu Z, Cai H, Yang Y, Chen T, Vallet CE, Zuhr RA, Beach DB, Peng ZH, Wu YD, Concolino TE, Rheingold AL, Xue Z. Reactions of tetrakis(dimethylamide)-titanium, -zirconium and -hafnium with silanes: synthesis of unusual amide hydride complexes and mechanistic studies of titanium-silicon-nitride (Ti-Si-N) formation. J Am Chem Soc 2001; 123:8011-21. [PMID: 11506557 DOI: 10.1021/ja010744s] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
M(NMe(2))(4) (M = Ti, Zr, Hf) were found to react with H(2)SiR'Ph (R' = H, Me, Ph) to yield H(2), aminosilanes, and black solids. Unusual amide hydride complexes [(Me(2)N)(3)M(mu-H)(mu-NMe(2))(2)](2)M (M = Zr, 1; Hf, 2) were observed to be intermediates and characterized by single-crystal X-ray diffraction. [(Me(2)N)(3)M(mu-D)(mu-NMe(2))(2)](2)M (1-d(2), 2-d(2)) were prepared through reactions of M(NMe(2))(4) with D(2)SiPh(2). Reactions of (Me(2)N)(3)ZrSi(SiMe(3))(3) (5) with H(2)SiR'Ph were found to give aminosilanes and (Me(2)N)(2)Zr(H)Si(SiMe(3))(3) (6). These reactions are reversible through unusual equilibria such as (Me(2)N)(3)ZrSi(SiMe(3))(3) (5) + H(2)SiPh(2) right arrow over left arrow (Me(2)N)(2)Zr(H)Si(SiMe(3))(3) (6) + HSi(NMe(2))Ph(2). The deuteride ligand in (Me(2)N)(2)Zr(D)Si(SiMe(3))(3) (6-d(1)) undergoes H-D exchange with H(2)SiR'Ph (R' = Me, H) to give 6 and HDSiR'Ph. The reaction of Ti(NMe(2))(4) with SiH(4) in chemical vapor deposition at 450 degrees C yielded thin Ti-Si-N ternary films containing TiN and Si(3)N(4). Ti(NMe(2))(4) reacts with SiH(4) at 23 degrees C to give H(2), HSi(NMe(2))(3), and a black solid. HNMe(2) was not detected in this reaction. The reaction mixture, upon heating, gave TiN and Si(3)N(4) powders. Analyses and reactivities of the black solid revealed that it contained -H and unreacted -NMe(2) ligands but no silicon-containing ligand. Ab initio quantum chemical calculations of the reactions of Ti(NR(2))(4) (R = Me, H) with SiH(4) indicated that the formation of aminosilanes and HTi(NR(2))(3) was favored. These calculations also showed that HTi(NH(2))(3) (3b) reacted with SiH(4) or H(3)Si-NH(2) in the following step to give H(2)Ti(NH(2))(2) (4b) and aminosilanes. The results in the current studies indicated that the role of SiH(4) in its reaction with Ti(NMe(2))(4) was mainly to remove amide ligands as HSi(NMe(2))(3). The removal of amide ligands is incomplete, and the reaction thus yielded "=Ti(H)(NMe(2))" as the black solid. Subsequent heating of the black solid and HSi(NMe(2))(3) may then yield TiN and Si(3)N(4), respectively, as the Ti-Si-N materials.
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Affiliation(s)
- X Liu
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
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127
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Liu W, He R, Xue Z. Developmental expression of the POU transcription factor qBrn-2 during somitic myogenesis in quail. Int J Dev Biol 2001; 45:415-20. [PMID: 11330861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
We prepared a specific antiserum to the qBrn-2 protein and examined the developmental distribution of this protein during quail somitic myogenesis. In contrast to its mammalian homolog N-Oct-3, qBrn-2 exhibited an impressive spatio-temporal profile in somitic myogenesis, in addition to the orthodox expression observed in the developing neural tube. In somites, qBrn-2 was expressed in the outer epithelial cells, but not in the core cells. During the somite differentiation, qBrn-2 expression was enhanced and restricted to myotome. The location of qBrn-2 expression seemed to overlap with that of myf5 and myoD in myotome. However, in cells that just began to express myf5 or myoD, qBrn-2 expression was not obvious. As embryonic development proceeded, qBrn-2 positive cells in myotome migrated dorsally and ventrally, and qBrn-2 expression was still observed at dorsal and ventral muscle masses in the forelimb. On the basis of our observations, it seems that qBrn-2 may play important roles in the determination, differentiation and migration of muscle precursor cells, in addition to its known roles in neurogenesis.
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Affiliation(s)
- W Liu
- Lab of Visual Information Processing, Institute of Biophysics, Chinese Academy of Sciences, Beijing
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128
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Liu W, Xue JX, He R, Xue Z. qBrn-2, a POU III gene in quail: distinct developmental expression revealed by a specific antibody. Mech Dev 2001; 100:349-52. [PMID: 11165496 DOI: 10.1016/s0925-4773(00)00531-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We examined qBrn-2 protein expression in quail from its onset to final profile with a specific antibody we prepared. qBrn-2 expression employed onset-widespread-restriction pattern, and precisely concurred with formation and differentiation of neural tube. qBrn-2 protein was also located outside neural tube. Obvious differences in expression were observed compared with that of Brn-2.
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Affiliation(s)
- W Liu
- Laboratory of Visual Information Processing, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, 100101, People's Republic of, Beijing, China
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129
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Jia MH, Larossa RA, Lee JM, Rafalski A, Derose E, Gonye G, Xue Z. Global expression profiling of yeast treated with an inhibitor of amino acid biosynthesis, sulfometuron methyl. Physiol Genomics 2000; 3:83-92. [PMID: 11015603 DOI: 10.1152/physiolgenomics.2000.3.2.83] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The expression pattern of 1,529 yeast genes in response to sulfometuron methyl (SM) was analyzed by DNA microarray technology. SM, a potent herbicide, inhibits acetolactate synthase, a branched-chain amino acid biosynthetic enzyme. Exposure of yeast cells to 0.2 microg/ml SM resulted in 40% growth inhibition, a Gcn4p-mediated induction of genes involved in amino acid and cofactor biosynthesis, and starvation response. The accumulation of intermediates led to the induction of stress response genes and the repression of genes involved in carbohydrate metabolism, nucleotide biosynthesis, and sulfur assimilation. Extended exposure to SM led to a relaxation of the initial response and induction of sugar transporter and ergosterol biosynthetic genes, as well as repression of histone and lipid metabolic genes. Exposure to 5 microg/ml SM resulted in >98% growth inhibition and stimulated a similar initial expression change, but with no relaxation after extended exposure. Instead, more stress response and DNA damage repair genes become induced, suggesting a serious cellular consequence. Other salient features of metabolic regulation, such as the coordinated expression of cofactor biosynthetic genes with amino acid biosynthetic ones, were evident from our data. A potential link between SM sensitivity and ergosterol metabolism was uncovered by expression profiling and confirmed by genetic analysis.
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Affiliation(s)
- M H Jia
- DuPont Central Research, DuPont Agricultural Biotechnology, Wilmington, Delaware 19880-0173, USA
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130
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Abstract
Mutations in the neurofibromatosis type 2 gene (NF2) cause benign nervous system tumors. Common methods for detecting NF2 mutations (such as single stranded conformational polymorphism analysis and denaturing gradient gel electrophoresis) are laborious and time-consuming. We adapted and improved a commercial assay, the Non-Isotopic RNase Cleavage Assay (NIRCAtrade mark, Ambion, Austin, TX) for rapid, non-isotopic, high-sensitivity screening for NF2 mutations in tumors. We improved the assay by: 1) extending the typical NIRCAtrade mark template size of < 500 bp to 1.3 kb without decreasing detection efficiency; 2) modifying the transcription step of the original protocol so that transcription of PCR products was increased by up to 50%; 3) optimizing the combination of cleavage enzymes and reaction time. With these modifications, mutations were found in 15 of 20 patients (75%) using NIRCAtrade mark. Seven of the point mutations detected (two nonsense, two missense, and three splice-site) are novel. All mutations were confirmed by direct sequencing and no mutations were found using direct sequencing in patients that were negative by NIRCAtrade mark. The 75% NF2 mutation detection rate using this design is similar to detection rates in tumors using other mutation detection methods.
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Affiliation(s)
- R Faudoa
- House Ear Institute, Los Angeles, California 90057, USA
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131
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Abstract
We isolated a quail class III POU domain gene, qBrain-2, which was cloned from a cDNA library of E5 embryos. Northern blot and in situ hybridization analyses showed that qBrain-2 was expressed in developing central nervous system and adult brain. Moreover, qBrain-2 transcripts showed a dynamic distribution in embryonic central nervous system. Its transcripts were dominantly detected in the ventricular zone of the developing brain and spinal cord, but rarely in the differentiated region of mantle zone as well as the non-neuronal roof plate and floor plate. This suggests that qBrain-2 is involved in proliferation and differentiation of the neuroepithelial cells of quail central nervous system.
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Affiliation(s)
- Y Liu
- Laboratory of Visual Information Processing, Institute of Biophysics, Chinese Academy of Sciences, 15 Da Tun Road, Chaoyang District, Beijing, China
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132
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Hung G, Faudoa R, Baser ME, Xue Z, Kluwe L, Slattery W, Brackman D, Lim D. Neurofibromatosis 2 phenotypes and germ-line NF2 mutations determined by an RNA mismatch method and loss of heterozygosity analysis in NF2 schwannomas. Cancer Genet Cytogenet 2000; 118:167-8. [PMID: 10748301 DOI: 10.1016/s0165-4608(99)00201-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We used a novel RNase cleavage assay (NIRCA) to screen for neurofibromatosis 2 (NF2) mutations in NF2 schwannomas. Mutations were found in tumors in 16 of 20 patients. Eleven patients (55%) had loss of heterozygosity or loss of one allele, indicating that the mutation was a germ-line mutation. The phenotypes of these patients were consistent with previous NF2 genotype-phenotype correlation studies: patients with nonsense mutations had severe phenotypes, whereas those with splice-site or missense mutations had milder and variable phenotypes. These results confirm the utility of NIRCA as a rapid and convenient method for screening for germ-line NF2 mutations.
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Affiliation(s)
- G Hung
- House Ear Institute, Los Angeles, CA 90057, USA
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133
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Xia J, Yin Z, Dai H, Xue Z, Chen Y, Pan Q, Ning L. [Molecular cytogenetics study in a case with unbalanced chromosome translocation]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2000; 17:10-2. [PMID: 10653900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
OBJECTIVE To analyze the chromosome structural aberration in a case of unbalanced chromosome translocation by fluorescence in situ hybridization technique. METHODS The 1,18 whole chromosome specific painting probe were used to confirm chromosome abnormality suggested by high resolution G-banding examination. RESULTS An unbalanced translocation t(1;18)(q42;q22) was detected in the patient, which caused partial trisomy of 1q42-qter and partial monosomy of 18q22-qter. CONCLUSION The identified translocation suggested a potential site for congenital heart disease.
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Affiliation(s)
- J Xia
- National Laboratory of Medial Genetics, Hunan Medical University, Changsha, Hunan, 410078 P.R. China.
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134
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Wang S, Xia T, Zhang Z, Kong X, Zeng L, Mi P, Xue Z. [Expression of VEGF and tumor angiogenesis in bladder cancer]. Zhonghua Wai Ke Za Zhi 2000; 38:34-6. [PMID: 11831983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate expression of vascular endothelial growth factor (VEGF) and its relation to angiogenesis in bladder cancer. METHODS The expression of VEGF by immunohistochemical staining was examined in 68 cases of primary transitional carcinoma (TCC) and 7 subjects with normal urothelium. Microvessel density (MVD) in 40 cases of invasive bladder cancer was determined by Factor VIII immunohistochemical staining. RESULTS The expression of VEGF was negative or low level in all normal bladder tissue but high in bladder cancer. VEGF and MVD were closely related to tumor cell nuclear grade and clinical stage. The average MVD was higher in the cases with the high level expression of VEGF, than in those with the low level expression of VEGF. CONCLUSIONS This study indicates that VEGF is positively correlated with the occurrence and progression of bladder cancer. VEGF is one of the primary angiogenic factors for bladder cancer, and is able to induce tumor angiogenesis and accelerate tumor growth. Quantification of VEGF may provide a valuable marker for a poorer prognosis of patients.
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Affiliation(s)
- S Wang
- Institute of Urology, Beijing Medical University, Beijing 100034, China
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135
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Kong X, Li J, Xue Z, Zeng L, Shen L, Xia T, Gu F, Guo Y. [Clinicopathologic study of 11 patients with Paget's disease of scrotum]. Zhonghua Wai Ke Za Zhi 1999; 37:424-6. [PMID: 11829879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To probe the relationship of clinicopathologic presentations and prognosis of Paget's disease primarily involving the scrotum. METHODS 11 cases of scrotal Paget's disease were studied retrospectively from 1984 to 1997. PAS was stained and EMA, S-100, HMB45, CEA and CA15-3 were immunostained in all cases for the differential diagnosis from Bowen's disease and malignant melanoma. RESULTS Six of 11 cases involved hair follicle and/or sweat glands, and 3 cases involved dermis (one had metastasis of left superficial and deep inguinal lymph nodes, and left internal iliac lymph nodes). Paget's cells were positive for PAS (11/11), EMA (11/11), CEA (6/11), CA15-3 (11/11), and negative for S-100, HMB45. Wide local excision of the lesions was performed in 10 of 11 patients both for primary disease and recurrent disease. 3 of the 10 patients underwent lymph nodes resection and metastasis was found in 1 case pathologically. One patient accepted chemotherapy and died, from respiratory insufficiency after one month. The other 10 patients were followed up for 6 to 127 months and no patient died of Paget's disease. CONCLUSIONS Involvement of hair follicles and sweat glands by Paget's cell does not influence the prognosis.However, invasion of dermis by Paget's cells may suggest possible metastasis.
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Affiliation(s)
- X Kong
- Department of Urology, First Hospital of Beijing Medical University, Beijing 100034
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136
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Yu Z, Xia T, Xue Z. [The detection of high risk human papillomaviruses in papillary transitional cell carcinoma of urinary bladder]. Zhonghua Wai Ke Za Zhi 1999; 37:369-71, 22. [PMID: 11829865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the histological evidence of high risk human papillomavirus infection in bladder cancer. METHODS 52 cases of papillary transitional cell carcinoma of the urinary bladder were studied for the incorporation of high risk human papillomavirus type 16 and type 18 DNA by non-isotopic in situ hybridization (NISH). RESULTS 19 of 52 cases (36.5%) were positive for HPV DNA with punctuate and/or diffuse purple-blue staining in the nucleus of cancer cells, including two cases positive both for HPV16/18. HPV DNA were predominantly expressed in superficial tumors. Among these positive tumors, adjacent normal epithelium and Brunn's nests also showed positive staining. Morphologically, HPV positive cells existed in the whole layer of papillary tumor cells, 3 of them presented koilocytoid change. CONCLUSIONS HPV infection might be a common event in urinary bladder and a potential factor for carcinogenesis of bladder cells.
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Affiliation(s)
- Z Yu
- Institute of Urology, First Hospital, Beijing Medical University, Beijing 100034
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137
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Shi ST, Yang GY, Wang LD, Xue Z, Feng B, Ding W, Xing EP, Yang CS. Role of p53 gene mutations in human esophageal carcinogenesis: results from immunohistochemical and mutation analyses of carcinomas and nearby non-cancerous lesions. Carcinogenesis 1999; 20:591-7. [PMID: 10223186 DOI: 10.1093/carcin/20.4.591] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In order to characterize p53 alterations in esophageal cancer and to study their roles in carcinogenesis, we performed gene mutation and immunohistochemical analysis on 43 surgically resected human esophageal specimens, which contain squamous cell carcinoma (SCC) and adjacent non-cancerous lesions, from a high-incidence area of Linzhou in Henan, China. A newly developed immunohisto-selective sequencing (IHSS) method was used to enrich the p53 immunostain-positive cells for mutation analysis. p53 gene mutations were detected in 30 out of 43 (70%) SCC cases. Among 29 SCC cases that were stained positive for p53 protein, 25 (86%) were found to contain p53 mutations. In five cases of SCC with homogeneous p53 staining, the same mutation was observed in samples taken from four different positions of each tumor. In a well differentiated cancer nest, p53 mutation was detected in only the peripheral p53-positive cells. In tumor areas with heterogeneous p53 staining, either the area stained positive for p53 had an additional mutation to the negatively stained area or both areas lacked any detectable p53 mutation. In the p53-positive non-cancerous lesions adjacent to cancer, p53 mutations were detected in seven out of 16 (47%) samples with basal cell hyperplasia (BCH), eight out of 12 (67%) samples with dysplasia (DYS), and six out of seven (86%) samples with carcinoma in situ (CIS). All mutations found in lesions with DYS and CIS were the same as those in the nearby SCC. In seven cases of BCH containing mutations, only three had the same mutations as the nearby SCC. The results suggest that p53 mutation is an early event in esophageal carcinogenesis occurring in most of the DYS and CIS lesions, and cells with such mutations will progress to carcinoma, whereas the role of p53 mutations in BCH is less clear.
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Affiliation(s)
- S T Shi
- Laboratory for Cancer Research, College of Pharmacy, Rutgers University, Piscataway, NJ 08855-0789, USA
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138
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Kong X, Zeng L, Xia T, Wang J, Mi P, Na Y, Xue Z, Pan B, Hao J, Gu F, Guo Y. [The effect of combined endocrine therapy on prostate and testis]. Zhonghua Wai Ke Za Zhi 1999; 37:231-4. [PMID: 11829828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study the pathological changes of the effect of combined endocrine therapy on normal prostate, benign prostatic hyperplasia, prostatic adenocarcinoma and testis. METHODS 11 radical prostatectomy specimens, 3 core-needle biopsies of prostate and 3 testes obtained after at least 3 months of enatone-flutamide inhibition therapy were studied. Step-section was performed on radical specimens and average 16 sections per case were reviewed. PSA, PSAP and AE1/AE3 were immunostained on 14 cases of prostate cancer and a comparative study pre- and post-treatment was made. RESULTS No residual tumor was recognized in 2 cases. Such characteristic changes were found in 9 cases as prominent acinar atrophy, decreased ratio of acini to stroma, stromal fibrosis, squamous metaplasia of carcinoma, cytoplasmic vaculation, nuclear shrinkage, and nucleolar shrinkage. No apparent change was discovered in 3 cases. Secretory epithelial atrophy and basal cell hyperplasia were the popular change in BPH and normal prostate. The expressions of both PSA and PSAP were markedly reduced in prostate carcinoma and nonneoplastic glands. Pathological downstaging of the tumor was not found statistically. Epithelial atrophy also existed in seminal vesicles and Leydig cells of the testes after hormone therapy. CONCLUSIONS Combined endocrine therapy results in histologically distinctive changes that can be found in both nonneoplastic and neoplastic prostate tissue. However, the drugs can not eradicate prostate cancer completely. Testis atrophy is the direct action of the therapy.
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Affiliation(s)
- X Kong
- Institute of Urology, First Hospital, Beijing Medical University, Beijing 100034
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139
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Peng M, Zhang Y, Xue Z, Han Q. [Alpha1-adrenoceptor subtypes in rabbit penile corpus cavernosum]. Zhonghua Wai Ke Za Zhi 1998; 36:497-9. [PMID: 11825451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study alpha(1)- adrenoceptor (alpha(1)- AR) subtypes with the functional role and the distribution of its subtypes in rabbit penile corpus cavernosum. METHOD The rabbit penile corpus cavernosum was studied by using functional experiment and radioligand binding assay. RESULT In the radioligand binding assay, the maximal binding capacity (Bmax of (125)IBE and alpha(1)-AR) decreased obviously after pretreatment with chloroethylclonidine (CEC), which were 746 +/- 236 fmol/mg protein and 214 +/- 71 fmol/mg protein, respectively. Alpha(1A)-, alpha(1D)-and alpha(1B)-AR took about 20%, 25% and 55%, respectively. In the functional experiments, the maximal contraction induced by norepinephrine (NE) was not decreased significantly after pretreatment with CEC. The pA(2) values of two alpha(1)-AR selective antagonists, 5-MU, BMY7378, for antagonizing NE-induced penile corpus cavernosum contraction had a high correlative association with the pK(I) values for cloned alpha(1A)-AR. CONCLUSION The functional alpha(1)-AR subtype is alpha(1A)-AR although there are three subtypes in the penile corpus cavernosum.
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Affiliation(s)
- M Peng
- Institute of Urology, Beiing Medical University, Beijing 100034
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140
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Pan B, Song Y, Kong X, Xue Z, Guo Y. [Primary epididymal tumors]. Zhonghua Wai Ke Za Zhi 1998; 36:138-40. [PMID: 11825350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To improve the diagnosis of primary epididymal tumors. METHOD In 23 primary epididymal tumors (22 benign and 1 malignant), 14 were adenomatoid tumors, 6 were leiomyomas, 1 was multiple fibrous pseudomonas and 1 was sclerosing hemangioma. Epididymal adenocarcinoma was seen in a 57-year-old man. RESULT Epididymal tumors might be easily misdiagnosed as epididymal tuberculosis, chronic epididymis and spermatocele. Apart from certain benign clinical characteristics, benign epididymal tumors could be diagnosed by B-ultrasonography and aspiration biopsy. Most malignant tumors of epididymis presented as rapidly growing scrotal masses and cured by the removal of tumors or the whole epididymis of the same side. 19 of 22 cases were free from recurrence. CONCLUSION Malignant epididymal tumors should be treated as malignant tumors of testis and their prognosis is extremely poor.
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Affiliation(s)
- B Pan
- Department of Urology, First Hospital of Beijing Medical Universiy, Beijing 100034
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141
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Na Y, Wu G, Hao J, Xue Z, Guo Y. [The use of laparoscopy in urology: report of 141 cases]. Zhonghua Wai Ke Za Zhi 1998; 36:143-5. [PMID: 11825352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To modify laparoscopy in urology. METHOD From May 1992 to Nov. 1996, 141 patients (110 males and 31 females) were subjected to laparoscopy in the treatment of urological diseases. The age of the patients ranged from 9 to 76 years (mean 39 years). Five patients had nephrectomy, 12 adrenalectomy, 48 renal cyst resection, 61 high ligation of internal spermatic vein, 5 pelvic staging lymphadenectomy, 9 orchiectomy, and 1 removal of bladder diverticulum. RESULT The rate of successful operation was 95.7% and that of complications was 2.22%. The mean hospitalization was 4.9 +/- 4.1 days. CONCLUSION Laparoscopy can be used widely in clinical practice.
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Affiliation(s)
- Y Na
- Institute of Urology, Beijing Medical University, Beijing 100034
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142
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Chunlian J, Changkun L, Jun S, Li J, Wenhan D, Xue Z, Kailai S. [Polymorphism distribution of ST14(DXS52) VNTR in normal individuals in northeastern region of China and its application in gene diagnosis of hemophilia A]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 1998; 15:31-4. [PMID: 9456369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To find out the polymorphism distribution of St14(DXS52) variable number of tandem repeat (VNTR) in normal individuals in the northeastern region of China and hence provide a proof for the gene diagnosis of hemophilia A. METHODS 60 unrelated individuals (male 12, female 48) in the northeastern region of China were detected using PCR method. RESULTS 8 allelic fragments detected were 0.7kb(A), 1. 3kb(B), 1.39kb(C), 1.57kb(D), 1.63kb(E), 1.69kb(F), 2.1kb(G), 2. 4kb(H) long in turn. Their frequencies were A 0.38, B0.046, C0.232, E0.111, F0.130, G0.009, H0.009 respectively. Polymorphism information contents (PIC) was 76.36%. Gene diagnosis of 3 hemophilia A patients was performed using this VNTR polymorphism. In one family a female was determined to be a normal individual, not a carrier; 2 male fetus patients were detected in other 2 families. CONCLUSION St14 is a valuable polymorphism marker for gene diagnosis of hemophilia A.
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Affiliation(s)
- J Chunlian
- Department of Medical Genetics, China Medical University, Shenyang, 110001 P. R. China
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143
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Xue Z, Ziller C, Xue XJ. Quox 1 homeobox protein is expressed in postmitotic sensory neurons of dorsal root ganglia. Brain Res Dev Brain Res 1998; 105:59-66. [PMID: 9497080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The expression of vertebrate homeoproteins has been extensively studied in a variety of normal and cancerous tissues, but little is known on the role of vertebrate homeoproteins in the proliferation and differentiation of cells from these tissues. In the present study, we investigate the relationship between Quox 1 protein (a quail homeodomain containing protein) expression and the proliferation and differentiation of quail dorsal root ganglia (DRG) and neural crest cells. In vivo [3H]TdR labeling experiments demonstrate that the postmitotic sensory neuroblasts appear before the formation of the ganglion, and that more than half of sensory neuroblasts from DRG have already terminated their proliferation in embryos of 2 days of incubation (E2). All DRG neurons have completely ceased to proliferate from E6.5 onwards. By means of immunocytochemistry, we observe that Quox 1 protein is accumulated exclusively in all bipolar neurons in culture of DRG from E9-E11, and in all postmitotic sensory-like neuroblasts during in vitro cell differentiation of the neural crest. The Quox 1 immunoreactive neurons express simultaneously neurofilaments or substance P, and they are never labeled by anti-bromodeoxyuridine. These observations together with the morphology of Quox 1 positive cells, demonstrate that Quox 1 protein is expressed in the postmitotic sensory neurons of DRG. Our previous experiments have shown that between E4 and E6, the accumulation of Quox 1 protein increases in DRG in vivo, but decreases in the central nervous system in which cell proliferation decreases (Xue et al., (1993) Mech. Dev. 43, 149-158). Taken together, our results show that the accumulation of Quox 1 protein in DRG is tightly linked to the increase in the number of postmitotic neurons, whereas in the central nervous system the level of expression of Quox 1 seems concomitant with the extent of cell proliferation.
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Affiliation(s)
- Z Xue
- Université Pierre et Marie Curie, Faculté de Médecine Pitié-Salpêtrière, CNRS URA 2115, Paris, France.
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144
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Luo H, Guo H, Xiao J, Xue Z. [Circadian variations of plasma SOD and MDA in health subjects]. Hua Xi Yi Ke Da Xue Xue Bao 1997; 28:401-3. [PMID: 10683957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Oxygen derived free radical system has been to be implicated in the pathogenesis of many diseases, such as cardiovascular disease, tumor, trauma and radiation injury. Many studies have suggested that oxygen free radical initiate a series of events that result in cell membrane alterations leading to the development of cell injury. The objective of the present study was to examine the circadian characteristics of some parameters of this system in the blood. One parameter was superoxide dismutase (SOD), a major oxygen free radical scavenger; the other was malondialdehyde (MDA), an important product of lipid peroxidation initiated by oxygen free radicals. Blood samples were collected at 6 h intervals beginning at 08:00 over a 24 h span in nine healthy volunteers (5 females, 4 males, average age 30 +/- 5 years). All participants were synchronized for one week with diurnal activity from 07:00 to 23:00 and nocturnal rest, with three meals served at 07:30, 12:00 and 19:00. Plasma SOD, MDA levels were measured by pyrogallol autoxidation assay, thiobarbituric acid spectrophotometry respectively, and the data were fitted with a 24 h cosine curve and analyzed further by a population-mean cosinor. The results showed that the plasma SOD levels exhibited a highly significant circadian rhythm (P < 0.001) in healthy subjects, with acrophase (phi) at 21:17, mesor (M) of 3975.3 +/- 680.5 u/g Hb, and amplitude (A) of 273.62 u/g Hb. A circadian rhythm of plasma MDA was also detected (P < 0.01), phi = 15:15, M = 4.23 +/- 0.86 mumol/L, A = 2.37 mumol/L). The evaluation of circadian natures of SOD and MDA may be important in the prevention, diagnosis and treatment of associated diseases.
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Affiliation(s)
- H Luo
- Research Unit of Biomedical Engineering, School of Basic Medical Sciences, Chengdu
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145
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Xu Q, Dai Z, Zhao Z, Xue Z. [Motion control system in BJ14 medical electron accelerator]. Zhongguo Yi Liao Qi Xie Za Zhi 1997; 21:263-265. [PMID: 11189272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A dual computer based control mode was used in 14 Mev medical electron accelerator. The special non-linear velocity transformation method makes the positioning operation very fast and convenient. The independent driving mode of four blades are suitable to clinical uses. A multi-interlock function provides a safe environment for user's operation.
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Affiliation(s)
- Q Xu
- Beijing Medical Equipment Institute
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146
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Luo H, Xiao J, Liu Q, Wang Z, Li S, Zhang L, Xue Z. [The effect of combining intra-aortic balloon pumping with tianma injection on myocardial ischemic-reperfusional injury in goats]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 1997; 14:296-8. [PMID: 11326854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The objective of this study was to explore the effect of combined Intra-Aortic Balloon Pumping (I-ABP) and Tianma Injection on necrotic area in goat myocardial ischemic-reperfusional models which were established by two hours ischemia and a follow-up reperfusion. The results showed that the combined effect of IABP and Tianma Injection was more significant than that of IABP or Tianma separately. It is suggested that IABP and Tianma Injection have synergetic effect on the limitation of necrotic area, which possibly results from their mechanisms for decreasing the size of infarct.
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Affiliation(s)
- H Luo
- Research Unit of Biomedical Engineering, West China University of Medical Sciences, Chengdu 610041
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147
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Shan X, Xue Z, Euskirchen G, Mélèse T. NNF1 is an essential yeast gene required for proper spindle orientation, nucleolar and nuclear envelope structure and mRNA export. J Cell Sci 1997; 110 ( Pt 14):1615-24. [PMID: 9247195 DOI: 10.1242/jcs.110.14.1615] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The nuclear envelope is central to nuclear structure and function. It plays a role in maintaining nuclear shape, allowing the exchange of macromolecules between the nucleus and the cytoplasm (via the nuclear pore complexes), and providing attachment sites for microtubules during chromosome segregation and nuclear migration (via the spindle pole body). We have isolated an essential yeast gene, NNF1 that is required for a number of nuclear functions. Cells depleted of Nnf1p or containing a temperature-sensitive nnf1 mutation have elongated microtubules and become bi- and multinucleate. They also have a fragmented nucleolous and accumulate poly(A)+ RNA inside the nucleus. A similar constellation of phenotypes has been reported in cells carrying mutations in a number of nuclear pore proteins, components of the Ran GTPase cycle, and the nuclear localization sequence receptor protein. Our results suggest that Nnf1p plays a role in a number of nuclear functions.
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Affiliation(s)
- X Shan
- Department of Biological Sciences, Columbia University, New York, New York 10027, USA
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148
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Zhang H, Xue Z, Zhang X, Hu Z. [Relationship between variations of temperature and humidity with reproduction of medical meloids]. Zhong Yao Cai 1997; 20:277-8. [PMID: 12572470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
This paper reports the relationship between variations of temperature and humidity with reproduction of two medical meloids (Mylabris phalerata, M. cichorii). The results show: for the copulation of two meloids, the suitable temperature is 22-28 degrees C, humidity 26-90%; for the suitable temperature and humidity of their oviposition, M. phalerata 26-28 degrees C and 60-68%, and M. cichorii 23-26 degrees C and 72-78%, respectively; for incubation, M. phalerata is 26-28 degrees C and 70-75% respectively, and M. cichorii must undergo the high and lower variation of temperature, the efficacious accumulative temperature must get of 1680.85 day. degrees C.
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Affiliation(s)
- H Zhang
- Institute of Materia Medica Planting, Sichuan Academy of Traditional Chinese Medicine and Materia Medica, Nanchuan 648408
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149
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Zhang L, Zhou L, Xue Z. [Influence of fibrin glue on biliointestinal anastomotic scar formation]. Zhonghua Wai Ke Za Zhi 1997; 35:186-8. [PMID: 10374531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Conventional suture technique in the reconstruction of the bile duct often result in anastomotic stenosis and eventual obstructive jaundice and biliary cirrhosis. To overcome the aforementioned drawbacks, fibrin glue (FG) was used instead in the biliointestinal anastomosis where indwelling stent was inserted to complete the experimental model. The experiment consisted of pathological study and ECVD evaluation of anastomotic specimens in order to follow up the whole process of anastomotic wound healing. The experimental studies dis-closed that FG promotes wound healing, limits scar formation, and accelerates scar softening and maturnation. FG plus 6-month indwelling stent can guarantee scar maturation. It is an effective method in the prevention of bile duct stricture.
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Affiliation(s)
- L Zhang
- Department of Surgery, Ninth People's Hospital, Shanghai Second Medical University
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150
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Abstract
Tetraploid yeast cells lacking BFR1 or overexpressing an essential gene BBP1 produce a novel type of ascus that contains asci instead of spores. We show here that the asci within an ascus likely arise because a/alpha spores undergo a second round of meiosis. Cells depleted of Bbp1p or lacking Bfr1p are defective in a number of processes such as nuclear segregation, bud formation, cytokinesis and nuclear spindle formation. Furthermore, deletion of BFR1 or overexpression of BBP1 leads to an increase in cell ploidy, indicating that Bfr1p and Bbp1p play roles in both the mitotic cell cycle and meiosis. Bfr1p and Bbp1p interact with each other in a two hybrid assay, further suggesting that they might form a complex important for cell cycle coordination.
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Affiliation(s)
- Z Xue
- Department of Biological Sciences, Columbia University, New York, New York 10027, USA
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