201
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Liu B, Hayes R, Yi Y, Mmbaga J, Checkel M, Zheng M. Three dimensional modelling of methane ignition in a reverse flow catalytic converter. Comput Chem Eng 2007. [DOI: 10.1016/j.compchemeng.2006.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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202
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Jia Q, Zheng M, Zhu Y, Li J, Xu C. Effects of organophilic montmorillonite on hydrogen bonding, free volume and glass transition temperature of epoxy resin/polyurethane interpenetrating polymer networks. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2006.10.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [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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203
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Cai F, Li C, Wu J, Min Q, Ouyang C, Zheng M, Ma S, Yu W, Lin F. Modulation of the oxidative stress and nuclear factor kappaB activation by theaflavin 3,3'-gallate in the rats exposed to cerebral ischemia-reperfusion. Folia Biol (Praha) 2007; 53:164-172. [PMID: 17976306] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The major pathobiological mechanisms of IR injury include excitotoxicity, oxidative stress, and inflammation. TF3, a major constituent of black tea, possesses biological functions such as anti-oxidative and anti-inflammatory activities. The purpose of this study was to verify the neuronal protective potential of TF3 and its mechanisms against cerebral IR injury in rats. TF3 administration (10 and 20 mg.kg-1) ameliorated the infarct volume. TF3 also decreased the content of MDA and NO. TF3 significantly increased the activity of SOD and GSH-Px, which were reduced by IR injury. Administration of TF3 decreased mRNA and protein expression of COX-2 and iNOS. DNA binding and Western blotting revealed an increase in NF-kappaB activation and IkappaB depletion in IR brain tissue. Pretreatment with TF3 markedly inhibited IRinduced increase in nuclear localization of NF-kappaB, and preserved IkappaB in the cytoplasm. The results show that TF3 exerts protective effects against cerebral IR injury by reducing oxidative stress and modulating the NF-kappaB activation.
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Affiliation(s)
- F Cai
- Department of Pharmacology, Medical College, Xianning University, Xianning, People's Republic of China
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204
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Torrens ON, Milkie DE, Zheng M, Kikkawa JM. Photoluminescence from intertube carrier migration in single-walled carbon nanotube bundles. Nano Lett 2006; 6:2864-7. [PMID: 17163720 DOI: 10.1021/nl062071n] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Photoluminescence (PL) identifies spectroscopic signatures of intertube transfer of optically pumped carriers in single-walled carbon nanotube (SWNT) ensembles. Resonant photoexcitation of large band gap SWNTs produces strong PL from smaller band gap SWNTs. Magnetic alignment measurements associate the energy-transfer PL peaks with the formation of SWNT bundles, suggesting that efficient coupling results from physical contact.
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Affiliation(s)
- O N Torrens
- Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104, USA
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205
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Zheng M, Friesen WO, Iwasaki T. Systems-level modeling of neuronal circuits for leech swimming. J Comput Neurosci 2006; 22:21-38. [PMID: 16998641 DOI: 10.1007/s10827-006-9648-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [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] [Received: 10/12/2005] [Revised: 06/07/2006] [Accepted: 06/30/2006] [Indexed: 10/24/2022]
Abstract
This paper describes a mathematical model of the neuronal central pattern generator (CPG) that controls the rhythmic body motion of the swimming leech. The systems approach is employed to capture the neuronal dynamics essential for generating coordinated oscillations of cell membrane potentials by a simple CPG architecture with a minimal number of parameters. Based on input/output data from physiological experiments, dynamical components (neurons and synaptic interactions) are first modeled individually and then integrated into a chain of nonlinear oscillators to form a CPG. We show through numerical simulations that the values of a few parameters can be estimated within physiologically reasonable ranges to achieve good fit of the data with respect to the phase, amplitude, and period. This parameter estimation leads to predictions regarding the synaptic coupling strength and intrinsic period gradient along the nerve cord, the latter of which agrees qualitatively with experimental observations.
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Affiliation(s)
- M Zheng
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904, USA
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206
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Gao L, Zheng M, Zhang B, Liu W. Polychlorinated dibenzo-p-dioxins and dibenzofurans in mussels and Gammarus spp. from Dongting Lake in People's Republic of China. Bull Environ Contam Toxicol 2006; 77:406-10. [PMID: 17033868 DOI: 10.1007/s00128-006-1080-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2006] [Accepted: 07/24/2006] [Indexed: 05/12/2023]
Affiliation(s)
- L Gao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Post Office Box 2871, Beijing, People's Republic of China, 100085
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207
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Chada S, Mhashilkar AM, Liu Y, Nishikawa T, Bocangel D, Zheng M, Vorburger SA, Pataer A, Swisher SG, Ramesh R, Kawase K, Meyn RE, Hunt KK. mda-7 gene transfer sensitizes breast carcinoma cells to chemotherapy, biologic therapies and radiotherapy: correlation with expression of bcl-2 family members. Cancer Gene Ther 2006; 13:490-502. [PMID: 16282987 DOI: 10.1038/sj.cgt.7700915] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [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: 11/09/2022]
Abstract
Current therapies used in the treatment of breast cancer are limited by systemic toxicity, rapid drug metabolism and intrinsic and acquired drug resistance. We have previously shown that adenoviral-mediated transfer of the melanoma differentiation-associated gene-7 (mda-7) elicits growth inhibition and apoptosis in various tumor types. Here, we evaluate the effects of Ad-mda7, alone and in combination with other therapies, against a panel of nine breast tumor cell lines and their normal counterparts; we report selective Ad-mda7-mediated p53-independent growth inhibition, G2/M cell cycle arrest, and apoptosis. In vivo, Ad-mda7 induced p53-independent tumor growth inhibition (P<0.004) in multiple xenograft models. We then evaluated the combination of Ad-mda7 with agents commonly used to treat breast cancer: radiotherapy (XRT), Tamoxifen, Taxotere, Adriamycin, and Herceptin. These agents exhibit diverse modes of action, including formation of bulky adducts, inhibition of DNA replication (Adriamycin, XRT), damage to microtubules (Taxotere), nonsteroidal estrogen antagonists (Tamoxifen), or Her2/neu receptor blockade (Herceptin). Treated with conventional anticancer drugs or radiation, MDA-7-expressing cells display additive or synergistic cytotoxicity and apoptosis that correlates with decreased BCL-2 expression and BAX upregulation. In vivo, animals that received Ad-mda7 and XRT underwent significant reduction of tumor growth (P<0.002). This is the first report of the synergistic effects of Ad-mda7 combined with chemotherapy or radiotherapy on human breast carcinoma cells.
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Affiliation(s)
- S Chada
- Introgen Therapeutics Inc., Houston, TX 77030, USA.
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208
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Luo J, Zheng M, Zhao X, Huo C, Yang L. Simplified expression for estimating release rate of hazardous gas from a hole on high-pressure pipelines. J Loss Prev Process Ind 2006. [DOI: 10.1016/j.jlp.2005.06.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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209
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Bocangel D, Zheng M, Mhashilkar A, Liu Y, Ramesh R, Hunt KK, Chada S. Combinatorial synergy induced by adenoviral-mediated mda-7 and Herceptin in Her-2+ breast cancer cells. Cancer Gene Ther 2006; 13:958-68. [PMID: 16783343 DOI: 10.1038/sj.cgt.7700972] [Citation(s) in RCA: 22] [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: 11/08/2022]
Abstract
The melanoma differentiation-associated gene-7 (mda-7) is a member of the interleukin-10 cytokine family and a novel tumor suppressor gene. Adenoviral-mediated mda-7 (Ad-mda7) gene transfer has tumor-specific growth inhibitory and proapoptotic effects in a broad spectrum of cancer cells. In breast cancer cells, adenoviral-induced mda-7 expression triggers antiproliferative effects by downregulation of survival signals, such as Bcl-2 and Akt. The anti-human epidermal growth factor receptor-2 (Her-2) monoclonal antibody, Trastuzumab (Herceptin), increases the sensitivity of Her-2/neu-overexpressing breast cancer cells to chemotherapeutic agents and radiotherapy. In this study, we evaluate the effects of treatment with Ad-mda7 and Herceptin combination therapy in a panel of Her-2/neu-overexpressing cell lines, and in established tumors in nude mice. Compared to individual treatments, the combination of Ad-mda7 and Herceptin elicits supra-additive antitumor activity in Her-2/neu-overexpressing tumor cell lines: increased cell death, cell cycle block and apoptosis. The Ad-mda7 and Herceptin interaction was shown to be synergistic by isobologram analysis. Ad-mda7 does not alter cell surface Her-2/neu levels, but the combination of Ad-mda7+Herceptin results in increased expression of cell surface E-cadherin with concomitant translocation of beta-catenin from the nucleus to the cell membrane. In vivo, the combination of Ad-mda7 and Herceptin showed significantly increased antitumor activity (P<0.003) against Her-2/neu-overexpressing tumors. These data suggest that the combination of Ad-mda7 with Herceptin may be a novel therapy for breast cancer patients whose tumors overexpress Her-2/neu. The observed synergistic effect may improve treatment options for otherwise poorly responsive, Her-2-positive, breast cancer patients.
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Affiliation(s)
- D Bocangel
- Introgen Therapeutics Inc., Houston, TX 77030, USA
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210
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Turan Y, Zheng M. Purification and characterization of an intracellular beta-glucosidase from the methylotrophic yeast Pichia pastoris. Biochemistry (Mosc) 2006; 70:1363-8. [PMID: 16417459 DOI: 10.1007/s10541-005-0270-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Pichia pastoris beta-glucosidase was purified to apparent homogeneity by salting out with ammonium sulfate, gel filtration, and ion-exchange chromatography with Q-Sepharose and CM-Sepharose. The enzyme is a tetramer (275 kD) made up of four identical subunits (70 kD). The pH optimum is 7.3, and it is fairly stable in the pH range 5.5-9.5. The temperature optimum is 40 degrees C. The purified beta-glucosidase is effectively active on p-/o-nitrophenyl-beta-D-glucopyranosides (p-/o-NPG) and 4-methylumbelliferyl-beta-D-glucopyranoside (4-MUG) with Km values of 0.12, 0.22, and 0.096 mM and Vmax values of 10.0, 11.7, and 6.2 micromol/min per mg protein, respectively. It also exhibits different levels of activity against p-nitrophenyl-1-thio-beta-D-glucopyranoside, cellobiose, gentiobiose, amygdalin, prunasin, salicin, and linamarin. The enzyme is competitively inhibited by gluconolactone, p-/o-nitrophenyl-beta-D-fucopyranosides (p-/o-NPF), and glucose against p-NPG as substrate. o-NPF is the most effective inhibitor of the enzyme activity with Ki value of 0.41 mM. The enzyme is more tolerant to glucose inhibition with Ki value of 7.2 mM for p-NPG. Pichia pastoris has been employed as a host for the functional expression of heterologous beta-glucosidases and the risk of high background beta-glucosidase activity is discussed.
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Affiliation(s)
- Y Turan
- Balikesir University, Arts and Sciences Faculty, Department of Biology, Balikesir, 10100, Turkey.
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211
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Iwasaki T, Zheng M. Sensory feedback mechanism underlying entrainment of central pattern generator to mechanical resonance. Biol Cybern 2006; 94:245-61. [PMID: 16404611 DOI: 10.1007/s00422-005-0047-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2005] [Accepted: 11/21/2005] [Indexed: 05/06/2023]
Abstract
Rhythmic body motions observed in animal locomotion are known to be controlled by neuronal circuits called central pattern generators (CPGs). It appears that CPGs are energy efficient controllers that cooperate with biomechanical and environmental constraints through sensory feedback. In particular, the CPGs tend to induce rhythmic motion of the body at a natural frequency, i.e., the CPGs are entrained to a mechanical resonance by sensory feedback. The objective of this paper is to uncover the mechanism of entrainment resulting from the dynamic interaction of the CPG and mechanical system. We first develop multiple CPG models for the reciprocal inhibition oscillator (RIO) and examine through numerical experiments whether they can be entrained to a simple pendulum. This comparative study identifies the neuronal properties essential for the entrainment. We then analyze the simplest model that captures the essential dynamics via the method of harmonic balance. It is shown that robust entrainment results from a strong, positive-feedback coupling of a lightly damped mechanical system and the RIO consisting of neurons with the complete adaptation property.
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Affiliation(s)
- T Iwasaki
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904-4746, USA.
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212
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Abstract
Humanin (HN) is a newly identified neuroprotective peptide. In this study, we investigated its antiapoptotic effect and the potential mechanisms in K562 cells. Upon serum deprivation, expression of HN in K562 cells decreased and its intracellular distribution changed from cytoplasm to cell membrane. In HN stably transfected K562 cells, apoptosis was delayed compared with control vector transfected cells as measured by flow cytometry. Furthermore, analysis of different mitogen-activated protein (MAP) kinases activity revealed that extracellular signal-regulated kinase (ERK) pathway was inhibited while p38 signaling was activated following serum deprivation in K562 cells. And in HN transfected K562 cells, ERK downregulation was not affected, but p38 activation was suppressed, which may responsible for the delayed apoptosis in these cells. Activation of the ERK signaling pathway by phorbol myristate 13-acetate (PMA) and sorbitol protected K562 cells from serum deprivation induced apoptosis. Additionally, overexpression of HN reduced megakaryocytic differentiation of K562 cells. The present data outline the role of ERK and p38 MAP kinases in serum deprivation induced apoptosis in K562 cells and figure out p38 signaling pathway as molecular target for HN delaying apoptosis in K562 cells.
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Affiliation(s)
- D Wang
- Lab of Stem Cell Biology, Beijing Institute of Transfusion Medicine, 27 Taiping Road, Beijing 100850, P. R. China
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213
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Zhang Z, Zheng M, Bindas J, Schwarzenberger P, Kolls J. Critical Role of Interleukin-17 and Interleukin-17 Receptor Signaling in Tnbs-Induced Colitis. J Investig Med 2006. [DOI: 10.1177/108155890605401s152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Z. Zhang
- Oregon Health & Science University, Portland, OR
| | - M. Zheng
- Children's Hospital of Pittsburgh, Pittsburgh, PA
| | - J. Bindas
- Children's Hospital of Pittsburgh, Pittsburgh, PA
| | | | - J.K. Kolls
- Children's Hospital of Pittsburgh, Pittsburgh, PA
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214
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Zhang Z, Zheng M, Bindas J, Schwarzenberger P, Kolls JK. 4 CRITICAL ROLE OF INTERLEUKIN-17 AND INTERLEUKIN-17 RECEPTOR SIGNALING IN Trinitrobenzene Sulfonic Acid-INDUCED COLITIS. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0004.3] [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: 11/18/2022]
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215
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Jia QM, Zheng M, Xu CZ, Chen HX. The mechanical properties and tribological behavior of epoxy resin composites modified by different shape nanofillers. POLYM ADVAN TECHNOL 2006. [DOI: 10.1002/pat.710] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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216
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Zhang Z, Zheng M, Bindas J, Schwarzenberger P, Kolls JK. 269 CRITICAL ROLE OF INTERLEUKIN-17 AND INTERLEUKIN-17 RECEPTOR SIGNALING IN TNBS-INDUCED COLITIS. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0004.268] [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: 11/18/2022]
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217
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Wood D, Robertson B, Zheng M, Fick D, Ackland T. 363 Advances in the treatment of chondral defects of the knee using autologous chondrocyte implantation. J Sci Med Sport 2005. [DOI: 10.1016/s1440-2440(17)30860-5] [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: 10/19/2022]
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218
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Weibing X, Jun L, Zheng M, Fengtao Y, Hexiang Z. Effect of 2.1 MPa and 4.1 MPa H2O2 exposure on auditory brain stem evoked potential in mice. Undersea Hyperb Med 2005; 32:391-6. [PMID: 16457087] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Brain auditory evoked potential (BAEP) in mice exposed to hyperbaric H2O2 pressure was monitored to reveal the correlation between altered synaptic transmission and hydrogen narcosis or isobaric HPNS. Inter peak latencies and wave amplitudes were selected as indices of assessment. The animals were exposed either to He-O2 or H2-O2 at 2.1 MPa and 4.1 MPa. Results showed that synaptic transmission was inhibited to various extents. The inhibition was partly due to the narcotic effect of hydrogen, which was added to the effect caused by hydrostatic pressure. On the other hand, asymmetrical reaction of each segment in the neuro-network might be responsible for the occurrence of HPNS.
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Affiliation(s)
- X Weibing
- The Diving Medicine Laboratory, the NMRI of the PLA Shanghai, China
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219
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Borek D, Chen Y, Zheng M, Otwinowski Z. High symmetry involved in cellular regulation. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305089774] [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: 11/10/2022] Open
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220
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Zhao X, Zheng M, Liang L, Zhang Q, Wang Y, Jiang G. Assessment of PCBs and PCDD/Fs along the Chinese Bohai Sea coastline using mollusks as bioindicators. Arch Environ Contam Toxicol 2005; 49:178-85. [PMID: 16001155 DOI: 10.1007/s00244-004-0130-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2004] [Accepted: 02/03/2005] [Indexed: 05/03/2023]
Abstract
Mollusk samples such as bivalves and gastropods were collected from eight sampling sites along Bohai Sea coastline from northeastern China. The samples were analyzed for polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) by high-resolution gas chromatography/high-resolution mass spectrometry (HRGC-HRMS) to elucidate bioaccumulation of persistent organic pollutants in benthon. Residue levels of sigmaPCBs and sigmaPCDD/Fs were in the ranges of 66.1 to 583.6 ng/g and 0.9 to 15317 pg/g on a lipid-weight basis, respectively, The pollution source was identified using principal component analysis (PCA) in some coastal areas. It indicated that the typical pollution sources were characterized by PCB3, which was one Chinese technical product of PCBs. PCA also revealed the similarity patterns of PCBs between identical species collected from the different sites. The higher gastropod PCB concentrations were related to a former capacitor factory and the paint factories in some coastal areas, but this was not the case with the bivalves. The results of this study suggest that some gastropod species may be a potential bioindicator or "sentinel" organism for marine PCBs monitoring.
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Affiliation(s)
- X Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China
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221
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Zheng M, Kashimori Y, Hoshino O, Fujita K, Kambara T. Behavior pattern (innate action) of individuals in fish schools generating efficient collective evasion from predation. J Theor Biol 2005; 235:153-67. [PMID: 15862586 DOI: 10.1016/j.jtbi.2004.12.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [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: 10/24/2004] [Revised: 12/13/2004] [Accepted: 12/29/2004] [Indexed: 11/16/2022]
Abstract
The schooling of fishes is one typical animal social behavior. One primary function of fish school is to protect members when attacked by predators. One main way that the school reduces the predator's chance of making a successful kill is to confuse the predator as it makes its strike. This may be accomplished by collective evasion behaviors organized through integration of motions of individual fish made based on their innate actions (behavior patterns). In order to investigate what kind of behavior pattern of individuals can generate the efficient collective evasion of a school, we present a model of evasion behavior pattern which consists of three component behavior patterns, schooling, cooperative escape, and selfish escape behavior patterns and the rule for choice of one among them with proper timing. Each fish determines its movement direction taking into account simultaneously three kinds of elemental motions, mimicking its neighbors, avoiding collisions with its nearest neighbors, and escaping from an approaching predator. The weights of three elemental motions are changed depending on which component behavior pattern the fish carries out. The values of the weights for three component behavior patterns can be definitively determined under the condition that the collective evasion of the school becomes the most efficient, that is, the probability that any member is eaten by the predator becomes minimum.
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Affiliation(s)
- M Zheng
- Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan.
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222
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Eastham J, McKiernan J, Gleason D, Zheng M, Saad F. Effect of zoledronic acid on bone pain and skeletal morbidity in patients with advanced prostate cancer; analysis by baseline pain. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4561] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- J. Eastham
- Memorial Sloan-Kettering Cancer Ctr, New York, NY; Columbia Univ, New York, NY; Advanced Clin Therapeutics, Tucson, AZ; Novartis Pharmaceuticals Corp, East Hanover, NJ; CHUM - Hôpital Notre-Dame, Montréal, PQ, Canada
| | - J. McKiernan
- Memorial Sloan-Kettering Cancer Ctr, New York, NY; Columbia Univ, New York, NY; Advanced Clin Therapeutics, Tucson, AZ; Novartis Pharmaceuticals Corp, East Hanover, NJ; CHUM - Hôpital Notre-Dame, Montréal, PQ, Canada
| | - D. Gleason
- Memorial Sloan-Kettering Cancer Ctr, New York, NY; Columbia Univ, New York, NY; Advanced Clin Therapeutics, Tucson, AZ; Novartis Pharmaceuticals Corp, East Hanover, NJ; CHUM - Hôpital Notre-Dame, Montréal, PQ, Canada
| | - M. Zheng
- Memorial Sloan-Kettering Cancer Ctr, New York, NY; Columbia Univ, New York, NY; Advanced Clin Therapeutics, Tucson, AZ; Novartis Pharmaceuticals Corp, East Hanover, NJ; CHUM - Hôpital Notre-Dame, Montréal, PQ, Canada
| | - F. Saad
- Memorial Sloan-Kettering Cancer Ctr, New York, NY; Columbia Univ, New York, NY; Advanced Clin Therapeutics, Tucson, AZ; Novartis Pharmaceuticals Corp, East Hanover, NJ; CHUM - Hôpital Notre-Dame, Montréal, PQ, Canada
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223
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Gao L, Zhao X, Zheng M, Zhang B, Liu W. Distribution of polychlorinated biphenyls in different depths of soil from a polluted area in the People's Republic of China. Bull Environ Contam Toxicol 2005; 74:962-7. [PMID: 16097332 DOI: 10.1007/s00128-005-0673-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Affiliation(s)
- L Gao
- Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Post Office Box 2871, Beijing 100085, People's Republic of China
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224
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Jia Q, Zheng M, Chen H, Shen R. Synthesis and characterization of polyurethane/epoxy interpenetrating network nanocomposites with organoclays. Polym Bull (Berl) 2005. [DOI: 10.1007/s00289-005-0372-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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225
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Chou SG, Plentz F, Jiang J, Saito R, Nezich D, Ribeiro HB, Jorio A, Pimenta MA, Samsonidze GG, Santos AP, Zheng M, Onoa GB, Semke ED, Dresselhaus G, Dresselhaus MS. Phonon-assisted excitonic recombination channels observed in DNA-wrapped carbon nanotubes using photoluminescence spectroscopy. Phys Rev Lett 2005; 94:127402. [PMID: 15903960 DOI: 10.1103/physrevlett.94.127402] [Citation(s) in RCA: 19] [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] [Subscribe] [Scholar Register] [Received: 08/08/2004] [Indexed: 05/02/2023]
Abstract
By using a sample of DNA-wrapped single-wall carbon nanotubes strongly enriched in the (6,5) nanotube, photoluminescence emissions observed at special excitation energy values were identified with specific mechanisms of phonon-assisted excitonic absorption and recombination processes associated with (6,5) nanotubes, including one-phonon, two-phonon, and some continuous-luminescence processes. Such detailed processes are not separately identified in three-dimensional semiconducting materials. A general theoretical framework is presented to interpret the experimentally observed phonon-assisted processes in terms of excitonic states.
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Affiliation(s)
- S G Chou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
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226
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Saad F, Eastham J, McKieman J, Gleason D, Zheng M. 572Long-term reduction of bone pain and skeletal morbidity with zoledronic acid in patients with prostate cancer and bone metastases. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1569-9056(05)80576-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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227
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Zheng M, Rosen L, Gordon D, Kaminski M, Howell A, Belch A, Apffelstaedt J, Hussein M, Hei Y, Coleman R. P104 Continuing benefit of zoledronic acid for the prevention of skeletal complications in breast cancer patients with bone metastases. Breast 2005. [DOI: 10.1016/s0960-9776(05)80140-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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228
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Brar VW, Samsonidze GG, Santos AP, Chou SG, Chattopadhyay D, Kim SN, Papadimitrakopoulos F, Zheng M, Jagota A, Onoa GB, Swan AK, Unlü MS, Goldberg BB, Dresselhaus G, Dresselhaus MS. Resonance Raman spectroscopy characterization of single-wall carbon nanotube separation by their metallicity and diameter. J Nanosci Nanotechnol 2005; 5:209-28. [PMID: 15853139 DOI: 10.1166/jnn.2005.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Several techniques were recently reported for the bulk separation of metallic (M) and semiconducting (S) single wall carbon nanotubes (SWNTs), using optical absorption and resonance Raman spectroscopy (RRS) as a proof of the separation. In the present work, we develop a method for the quantitative evaluation of the M to S separation ratio, and also for the SWNT diameter selectivity of the separation process, based on RRS. The relative changes in the integrated intensities of the radial-breathing mode (RBM) features, with respect to the starting material, yield the diameter probability distribution functions for M and S SWNTs in the separated fractions, accounting for the different resonance conditions of individual SWNTs, while the diameter distribution of the starting material is obtained following the fitting procedure developed by Kuzmany and coworkers. Features other than the RBM are generally less effective for characterization of the separation process for SWNTs.
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Affiliation(s)
- V W Brar
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
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229
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Chou S, Ribeiro H, Barros E, Santos A, Nezich D, Samsonidze G, Fantini C, Pimenta M, Jorio A, Filho FP, Dresselhaus M, Dresselhaus G, Saito R, Zheng M, Onoa G, Semke E, Swan A, Ünlü M, Goldberg B. Optical characterization of DNA-wrapped carbon nanotube hybrids. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.08.117] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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230
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Barten DM, Guss VL, Corsa JA, Loo A, Hansel SB, Zheng M, Munoz B, Srinivasan K, Wang B, Robertson BJ, Polson CT, Wang J, Roberts SB, Hendrick JP, Anderson JJ, Loy JK, Denton R, Verdoorn TA, Smith DW, Felsenstein KM. Dynamics of {beta}-amyloid reductions in brain, cerebrospinal fluid, and plasma of {beta}-amyloid precursor protein transgenic mice treated with a {gamma}-secretase inhibitor. J Pharmacol Exp Ther 2004; 312:635-43. [PMID: 15452193 DOI: 10.1124/jpet.104.075408] [Citation(s) in RCA: 136] [Impact Index Per Article: 6.8] [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: 12/24/2022] Open
Abstract
gamma-Secretase inhibitors are one promising approach to the development of a therapeutic for Alzheimer's disease (AD). gamma-Secretase inhibitors reduce brain beta-amyloid peptide (Abeta), which is believed to be a major contributor in the etiology of AD. Transgenic mice overexpressing the human beta-amyloid precursor protein (APP) are valuable models to examine the dynamics of Abeta changes with gamma-secretase inhibitors in plaque-free and plaque-bearing animals. BMS-299897 2-[(1R)-1-[[(4-chlorophenyl)sulfony](2,5-difluorophenyl)amino]ethyl]-5-fluorobenzenepropanoic acid, a gamma-secretase inhibitor, showed dose- and time dependent reductions of Abeta in brain, cerebrospinal fluid (CSF), and plasma in young transgenic mice, with a significant correlation between brain and CSF Abeta levels. Because CSF and brain interstitial fluid are distinct compartments in composition and location, this correlation could not be assumed. In contrast, aged transgenic mice with large accumulations of Abeta in plaques showed reductions in CSF Abeta in the absence of measurable changes in plaque Abeta in the brain after up to 2 weeks of treatment. Hence, CSF Abeta levels were a valuable measure of gamma-secretase activity in the central nervous system in either the presence or absence of plaques. Transgenic mice were also used to examine potential side effects due to Notch inhibition. BMS-299897 was 15-fold more effective at preventing the cleavage of APP than of Notch in vitro. No changes in the maturation of CD8(+) thymocytes or of intestinal goblet cells were observed in mice treated with BMS-299897, showing that it is possible for gamma-secretase inhibitors to reduce brain Abeta without causing Notch-mediated toxicity.
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Affiliation(s)
- D M Barten
- Neuroscience Drug Discovery, Bristol-Myers Squibb, P.O. Box 5100, 3CD-405, 5 Research Pkwy., Wallingford, CT 06492, USA.
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231
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Kaminski M, Rosen L, Gordon D, Zheng M, Hei YJ. Zoledronic acid versus pamidronate in patients with breast cancer and multiple myeloma who are at high risk for skeletal complications. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- M. Kaminski
- American Medical Research Institute, Kennesaw, GA; Cancer Institute Medical Group, Santa Monica, CA; US Oncology, San Antonio, TX; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - L. Rosen
- American Medical Research Institute, Kennesaw, GA; Cancer Institute Medical Group, Santa Monica, CA; US Oncology, San Antonio, TX; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - D. Gordon
- American Medical Research Institute, Kennesaw, GA; Cancer Institute Medical Group, Santa Monica, CA; US Oncology, San Antonio, TX; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - M. Zheng
- American Medical Research Institute, Kennesaw, GA; Cancer Institute Medical Group, Santa Monica, CA; US Oncology, San Antonio, TX; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - Y. J. Hei
- American Medical Research Institute, Kennesaw, GA; Cancer Institute Medical Group, Santa Monica, CA; US Oncology, San Antonio, TX; Novartis Pharmaceuticals Corporation, East Hanover, NJ
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232
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Chin JL, Saad F, Gleason DM, Murray R, Tchekmedyian S, Venner P, Lacombe L, Vinholes JJ, Zheng M, Hei YJJ. Clinical benefit of zoledronic acid for the prevention of skeletal complications in patients with prostate cancer based on history of skeletal complications. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- J. L. Chin
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - F. Saad
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - D. M. Gleason
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - R. Murray
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - S. Tchekmedyian
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - P. Venner
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - L. Lacombe
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - J. J. Vinholes
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - M. Zheng
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
| | - Y.-J. J. Hei
- London Health Sciences Centre, East London, ON, Canada; Centre Hospitalier de I'Universite de Montreal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tucson, AZ; Peter MacCallum Cancer Institute, East Melbourne, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie delUnivLaval, Quebec, PQ, Canada; Irmandade de Santa Casa de Misericórdia de Porto, Rio Grande do Sul, Brazil; Novartis
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233
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Hirsh V, Tchekmedyian NS, Rosen L, Zheng M, Hei YJ. Clinical benefit of zoledronic acid in patients with lung cancer and other solid tumors: Analysis based on prior history of skeletal complications. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- V. Hirsh
- McGill University, Montreal, PQ, Canada; Pacific Shores Medical Group, Long Beach, CA; Cancer Institute Medical Group, Santa Monica, CA; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - N. S. Tchekmedyian
- McGill University, Montreal, PQ, Canada; Pacific Shores Medical Group, Long Beach, CA; Cancer Institute Medical Group, Santa Monica, CA; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - L. Rosen
- McGill University, Montreal, PQ, Canada; Pacific Shores Medical Group, Long Beach, CA; Cancer Institute Medical Group, Santa Monica, CA; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - M. Zheng
- McGill University, Montreal, PQ, Canada; Pacific Shores Medical Group, Long Beach, CA; Cancer Institute Medical Group, Santa Monica, CA; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - Y. J. Hei
- McGill University, Montreal, PQ, Canada; Pacific Shores Medical Group, Long Beach, CA; Cancer Institute Medical Group, Santa Monica, CA; Novartis Pharmaceuticals Corporation, East Hanover, NJ
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234
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Saad F, Gleason DM, Murray R, Tchekmedyian NSS, Venner P, Lacombe L, Chin J, Vinholes JJ, Zheng M, Hei YJ. Continuing benefit of zoledronic acid for the prevention of skeletal complications in men with advanced prostate cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- F. Saad
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - D. M. Gleason
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - R. Murray
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - N. S. S. Tchekmedyian
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - P. Venner
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - L. Lacombe
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - J. Chin
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - J. J. Vinholes
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - M. Zheng
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
| | - Y.-J. Hei
- Centre Hospitalier de l'Université de Montréal, Montreal, PQ, Canada; Advanced Clinical Therapeutics, Tuscon, AZ; Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia; Pacific Shores Medical Group, Long Beach, CA; Cross Cancer Institute, Edmonton, AB, Canada; LeCentre de Recherche en Cancerologie del'Univ Lav, Quebec, PQ, Canada; London Health Sciences Centre, East London, ON, Canada; Irmandade da Santa Casa de Misericordia de Porto, Rio Grande do Sul, Brazil; Novartis Pharmaceuticals
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235
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Major PP, Cook RJ, Chen BL, Zheng M. Zoledronic acid reduces the need for radiation to bone in patients with breast or prostate cancer metastatic to bone: A survival-adjusted cumulative incidence analysis. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.8058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- P. P. Major
- McMaster University, Hamilton, ON, Canada; University of Waterloo, Waterloo, ON, Canada; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - R. J. Cook
- McMaster University, Hamilton, ON, Canada; University of Waterloo, Waterloo, ON, Canada; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - B.-L. Chen
- McMaster University, Hamilton, ON, Canada; University of Waterloo, Waterloo, ON, Canada; Novartis Pharmaceuticals Corporation, East Hanover, NJ
| | - M. Zheng
- McMaster University, Hamilton, ON, Canada; University of Waterloo, Waterloo, ON, Canada; Novartis Pharmaceuticals Corporation, East Hanover, NJ
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236
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Liu W, Zheng M, Xing Y, Wang D. Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in 1,4-dichlorobenzene mothballs. Bull Environ Contam Toxicol 2004; 73:93-97. [PMID: 15386077 DOI: 10.1007/s00128-004-0398-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- W Liu
- Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Post Office Box 2871, Beijing 100085, People's Republic of China
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237
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Coleman R, Rosen L, Zheng M. Zoledronic acid has long-term efficacy in reducing skeletal complications in patients with bone metastases from breast cancer. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)90849-x] [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: 11/24/2022] Open
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238
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Lipton A, Dewar R, Conte P, Zheng M. Long-term safety of zoledronic acid for the treatment of patients with breast cancer and bone metastases. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)90899-3] [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] Open
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Abstract
The shell of pink conch is a kind of natural well-designed composite with excellent mechanical properties, which provides us information for material design. In this paper the microstructures of pink conch shell are characterized by using SEM and TEM. The microscopic analysis indicates that the pink conch shell is with crossed-lamellar microstructure and the angle between two second-order lamellae is 70-90 degrees. The cracking and fracture morphologies indicate that the crack deflection, bridge and fiber pullout are the main toughening mechanisms. Bamboo lamellae are employed to make the simple bio-mimetic model materials. In the model material the rotated angle between the fibers of each glued lamella varies from 0 degrees to 90 degrees. Three-point-bending is employed to test the properties of models material, such as the elastic modulus, the flexural strength and the fracture strain energy density. It is found that the fracture strain energy density of the specimens with the rotated angle between the fibers of the layers about 60 degrees exhibits the maximum value, which is close to the angle of the two second-order lamellae of the conch shell.
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Affiliation(s)
- D F Hou
- School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
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240
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Zheng M. Difference of microvessel density and CD34 Expression between carcinoma and normal mucosa. Otolaryngol Head Neck Surg 2003. [DOI: 10.1016/s0194-5998(03)01012-x] [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: 10/27/2022]
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241
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Lipton A, Colombo-Berra A, Bukowski R, Rosen L, Zheng M, Urbanowitz G. Zometa® (Zoledronic acid) reduces skeletal complications in patients with bone metastases from renal cell carcinomain patients with bone metastases from renal cell carcinoma. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s1569-9056(03)80385-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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242
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Abstract
1. Hydromorphone-3-glucuronide, dihydromorphine, dihydroisomorphine, dihydromorphine-3-glucuronide and dihydroisomorphine-3-glucuronide were isolated from a cancer patient's urine and identified as metabolites of hydromorphone by comparison with synthetic standards using LC/MS/MS with gradient elution. 2. The relative urinary recovery of dihydroisomorphine-3-glucuronide was estimated to be 17-fold higher than previously reported. 3. Three new metabolites, including hydromorphone-3-sulphate, norhydromorphone and nordihydroisomorphine, were tentatively identified.
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Affiliation(s)
- M Zheng
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2146 East Mall, Vancouver, BC V6T 1Z3, Canada
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243
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Zheng M, Khangulov SV, Dismukes GC, Barynin VV. Electronic structure of dimanganese(II,III) and dimanganese(III,IV) complexes and dimanganese catalase enzyme: a general EPR spectral simulation approach. Inorg Chem 2002. [DOI: 10.1021/ic00080a030] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zheng M, McErlane KM, Ong MC. LC-MS-MS analysis of hydromorphone and hydromorphone metabolites with application to a pharmacokinetic study in the male Sprague-Dawley rat. Xenobiotica 2002; 32:141-51. [PMID: 11868970 DOI: 10.1080/00498250110091767] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 10/16/2022]
Abstract
1. A high performance liquid chromatography-mass spectrometry-mass spectrometry (LC-MS-MS) assay was developed for the analysis of hydromorphone and its metabolites, namely dihydromorphine, dihydroisomorphine, hydromorphone-3-glucuronide, dihydromorphine-3-glucuronide and dihydroisomorphine-3-glucuronide, in rat plasma samples. 2. Analytes were extracted by solid-phase extraction using C2 cartridges. The extraction recoveries were > 76% for all analytes. Both intra- and interassay variabilities were < or = 12%. Using a plasma sample size of 100 microl, the limits of detection were 7.0 nmol(-1) (2.0 ng ml(-1)) for hydromorphone, dihydromorphine and dihydroisomorphine and 11 nmol l(-1) (5.0 ng ml l(-1)) for hydrormorphone-3-glucuronide, dihydromorphine-3-glucuronide and dihydroisomorhine-3-glucuronide at a signal-to-noise ratio = 3. 3. The present assay was applied to a pharmacokinetic study in rat after intraperitoneal administration of hydromorphone.
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Affiliation(s)
- M Zheng
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, Canada
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Abstract
Large-ring cyclodextrins (LR-CD) are cyclic α-1,4-glucans composed of nine to more than several hundred glucopyranose units. Cyclodextrins are able to form highly specific inclusion complexes with a wide range of guest molecules thereby modifying their physicochemical properties. Only in the past 10 years, LR-CD with a degree of polymerization between 9 and 32 have been isolated and characterized. The structures of these LR-CD show novel features distinct from those of the extensively studied α- β-, and γ-CD composed of six, seven, and eight glucopyranose units, respectively. Recent work on the enzymatic synthesis of LR-CD has confirmed the ability of different 4-α-glucanotransferases to form large cyclic α-1,4-glucans from amylose and amylopectin, depending on the specificity of the enzyme used and on the substrate and reaction conditions chosen. The potential of LR-CD for specific host-guest interactions and corresponding applications has been demonstrated.
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Zheng M, Shellito JE, Marrero L, Zhong Q, Julian S, Ye P, Wallace V, Schwarzenberger P, Kolls JK. CD4+ T cell-independent vaccination against Pneumocystis carinii in mice. J Clin Invest 2001; 108:1469-74. [PMID: 11714738 PMCID: PMC209424 DOI: 10.1172/jci13826] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [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: 11/17/2022] Open
Abstract
Host defenses are profoundly compromised in HIV-infected hosts due to progressive depletion of CD4+ T lymphocytes. Moreover, deficient CD4+ T lymphocytes impair vaccination approaches to prevent opportunistic infection. Therefore, we investigated a CD4+ T cell-independent vaccine approach to a prototypic AIDS-defining infection, Pneumocystis carinii (PC) pneumonia. Here, we demonstrate that bone marrow-derived dendritic cells (DCs) expressing the murine CD40 ligand, when pulsed ex vivo by PC antigen, elicited significant titers of anti-PC IgG in CD4-deficient mice. Vaccinated animals demonstrated significant protection from PC infection, and this protection was the result of an effective humoral response, since adoptive transfer of CD4-depleted splenocytes or serum conferred this protection to CD4-deficient mice. Western blot analysis of PC antigen revealed that DC-vaccinated, CD4-deficient mice predominantly reacted to a 55-kDa PC antigen. These studies show promise for advances in CD4-independent vaccination against HIV-related pathogens.
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Affiliation(s)
- M Zheng
- Section of Pulmonary and Critical Care, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112, USA
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Wang W, Sun Y, Zhou N, Li H, Zheng M, Li J, Liu X. [Spectroscopic differentiation between normal bronchial and lung cancer tissues by laser-induced fluorescence (LIF) with intravenous injection of hematoporphyrin monomethyl ether (HMME)]. Zhongguo Fei Ai Za Zhi 2001; 4:360-3. [PMID: 21059318 DOI: 10.3779/j.issn.1009-3419.2001.05.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To study the feasibility of laser-induced fluorescence ( LIF) spectroscopy with intravenous injection of a new agent, hematoporphyrin monomethyl ether (HMME) , in the diagnosis of lung cancer. METHODS Fifteen patients with lung cancer were administrated HMME 2. 5 mg/ kg intravenously three hours before lobectomy. Surgical specimens were collected for examination of LIF spectrum. TheLIF spectra of normal bronchial and lung cancer tissues were measured with a detecting system which consists of an YAG laser ( wavelength 355 nm) and an optical multichannel analyzer ( OMA) . The patholog ical examination was performed in each specimen. RESULTS The fluorescence intensity of the lung cancer tissues ( 31 446±5 017) was much lower than that of the normal bronchial tissues ( 75 430±8 908) ( P < 0. 001) . There was a flat spectrum in the normal bronchial tissues at the wavelength from 580 to 600 nm ( I580nm / I600nm = 1. 081 ±0. 090) , but the cancer tissue spectrum showed a smoothly descending profile ( I580nm/ I600nm = 1. 260±0. 157) . A remarkable characteristic peak ( drug peak) located at the 623. 4 nm±1. 6 nm in the lung cancer spectrum. Using the criterion of I580nm/ I600nm , the sensitivity, specificity, and accuracy of the diagnosis for lung cancer were 80. 0%, 73. 9%, and 76. 7%, respectively , and were 95. 0%, 91. 3% and 93. 0% respectively according to the criterion of the slope of the drug peak. CONCLUSIONS The LIF spectroscopy following intravenous injection of the new photosensitiser HMME can differentiate lung cancer from normal bronchus and can increase the sensitivity, specificity and the accuracy comparing to the laser-induced auto fluorescence in the diagnosis of lung cancer.
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Affiliation(s)
- W Wang
- Department of Thoracic Surgery , Naval General Hospital of PLA, Beijing 100037, P. R . China
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Storf M, Parbel A, Meyer M, Strohmann B, Scheer H, Deng MG, Zheng M, Zhou M, Zhao KH. Chromophore attachment to biliproteins: specificity of PecE/PecF, a lyase-isomerase for the photoactive 3(1)-cys-alpha 84-phycoviolobilin chromophore of phycoerythrocyanin. Biochemistry 2001; 40:12444-56. [PMID: 11591166 DOI: 10.1021/bi010776s] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [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: 11/28/2022]
Abstract
PecE and PecF, the products of two phycoerythrocyanin lyase genes (pecE and pecF) of Mastigocladus laminosus (Fischerella), catalyze two reactions: (1) the regiospecific addition of phycocyanobilin (PCB) to Cys-alpha 84 of the phycoerythrocyanin alpha-subunit (PecA), and (2) the Delta 4-->Delta 2 isomerization of the PCB to the phycoviolobilin (PVB)-chromophore [Zhao et al. (2000) FEBS Lett. 469, 9-13]. The alpha-apoprotein (PecA) as well PecE and PecF were overexpressed from two strains of M. laminosus, with and without His-tags. The products of the spontaneous addition of PCB to PecA, and that of the reaction catalyzed by PecE/F, were characterized by their photochemistry and by absorption, fluorescence, circular dichroism of the four states obtained by irradiation with light (15-Z/E isomers of the chromophore) and/or modification of Cys-alpha 98/99 with thiol-directed reagents. The spontaneous addition leads to a 3(1)-Cys-PCB adduct, which is characteristic of allophycocyanins and phycocyanins, while the addition catalyzed by PecE and PecF leads to a 3(1)-Cys-PVB adduct which after purification was identical to alpha-PEC. The specificity and kinetics of the chromophore additions were investigated with respect to the structure of the bilin substrate: The 3-ethylidene-bilins, viz., PCB, its 18-vinyl analogue phytochromobilin, phycoerythrobilin and its dimethylester, react spontaneously to yield the conventional addition products (3-H, 3(1)-Cys), while the 3-vinyl-substituted bilins, viz., bilirubin and biliverdin, were inactive. Only phycocyanobilin and phytochromobilin are substrates to the addition-isomerization reaction catalyzed by PecE/F. The slow spontaneous addition of phycoerythrobilin is not influenced, and there is in particular no catalyzed isomerization to urobilin.
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Affiliation(s)
- M Storf
- Botanisches Institut, Universität München, Germany
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Liao P, Georgakopoulos D, Kovacs A, Zheng M, Lerner D, Pu H, Saffitz J, Chien K, Xiao RP, Kass DA, Wang Y. The in vivo role of p38 MAP kinases in cardiac remodeling and restrictive cardiomyopathy. Proc Natl Acad Sci U S A 2001; 98:12283-8. [PMID: 11593045 PMCID: PMC59806 DOI: 10.1073/pnas.211086598] [Citation(s) in RCA: 260] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Stress-induced mitogen-activated protein kinase (MAP) p38 is activated in various forms of heart failure, yet its effects on the intact heart remain to be established. Targeted activation of p38 MAP kinase in ventricular myocytes was achieved in vivo by using a gene-switch transgenic strategy with activated mutants of upstream kinases MKK3bE and MKK6bE. Transgene expression resulted in significant induction of p38 kinase activity and premature death at 7-9 weeks. Both groups of transgenic hearts exhibited marked interstitial fibrosis and expression of fetal marker genes characteristic of cardiac failure, but no significant hypertrophy at the organ level. Echocardiographic and pressure-volume analyses revealed a similar extent of systolic contractile depression and restrictive diastolic abnormalities related to markedly increased passive chamber stiffness. However, MKK3bE-expressing hearts had increased end-systolic chamber volumes and a thinned ventricular wall, associated with heterogeneous myocyte atrophy, whereas MKK6bE hearts had reduced end-diastolic ventricular cavity size, a modest increase in myocyte size, and no significant myocyte atrophy. These data provide in vivo evidence for a negative inotropic and restrictive diastolic effect from p38 MAP kinase activation in ventricular myocytes and reveal specific roles of p38 pathway in the development of ventricular end-systolic remodeling.
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Affiliation(s)
- P Liao
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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