476
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Yang X, Zhu Z, Liu Q, Chen X. Thermal and rheological properties of poly(vinyl alcohol) and water‐soluble chitosan hydrogels prepared by a combination of γ‐ray irradiation and freeze thawing. J Appl Polym Sci 2008. [DOI: 10.1002/app.28436] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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477
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Qiu F, Zhu Z, Kang N, Piao S, Qin G, Yao X. Isolation and Identification of Urinary Metabolites of Berberine in Rats and Humans. Drug Metab Dispos 2008; 36:2159-65. [DOI: 10.1124/dmd.108.021659] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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478
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Yang X, Zhu Z, Liu Q, Chen X, Ma M. Effects of PVA, agar contents, and irradiation doses on properties of PVA/ws-chitosan/glycerol hydrogels made by γ-irradiation followed by freeze-thawing. Radiat Phys Chem Oxf Engl 1993 2008. [DOI: 10.1016/j.radphyschem.2008.02.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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479
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Thomas PB, Zhu Z, Selvam S, Samant DM, Stevenson D, Mircheff AK, Schechter JE, Song SW, Trousdale MD. Autoimmune dacryoadenitis and keratoconjunctivitis induced in rabbits by subcutaneous injection of autologous lymphocytes activated ex vivo against lacrimal antigens. J Autoimmun 2008; 31:116-22. [PMID: 18534818 DOI: 10.1016/j.jaut.2008.04.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2008] [Accepted: 04/17/2008] [Indexed: 11/29/2022]
Abstract
Autologous peripheral blood lymphocytes (PBL), activated in a mixed cell reaction when co-cultured with purified rabbit lacrimal epithelial cells, are known to induce a Sjögren's-like autoimmune dacryoadenitis and keratoconjunctivitis when injected directly back into the donor animal's inferior lacrimal gland (LG). This study shows that autoreactive lymphocytes injected subcutaneously in a site away from the LG is capable of inducing an autoimmune disease in a rabbit. Induced disease (ID) develops more slowly, taking 4weeks as compared to 2weeks in the direct injection model. Initially, both clinical symptoms and histopathology are less pronounced than in the direct injection ID model, but later the immunocytochemistry shows the same CD4+/CD8+ ratio of 4:1 for both injection methods. The finding that lymphocytes activated against lacrimal antigens can travel or home from the injection site back to the inferior and superior LG, as well as the conjunctiva, suggests that these anatomical sites may have common epitopes that induce pathogenic CD4+ T cells that produce a Sjögren's-like syndrome.
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480
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Zhou LF, Zhang MS, Hu AH, Zhu Z, Yin KS. Selective blockade of NF-kappaB by novel mutated IkappaBalpha suppresses CD3/CD28-induced activation of memory CD4+ T cells in asthma. Allergy 2008; 63:509-17. [PMID: 18070230 DOI: 10.1111/j.1398-9995.2007.01580.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Nuclear factor kappaB (NF-kappaB) overactivation plays a crucial role in T-helper 2 (Th2)-biased allergic airway inflammation by increased activation and decreased apoptosis of CD4(+) T cells. We have shown that targeted NF-kappaB suppression in dendritic cells by adenoviral gene transfer of a novel mutated inhibitor of NF-kappaB (IkappaBalpha) (AdIkappaBalphaM) contributes to T-cell tolerance, but the immunosuppressive action of AdIkappaBalphaM on memory (CD45RO(+)) CD4(+) T cells remains enigmatic. METHODS CD45RO(+) T cells from Dermatophagoides farinaei-sensitized asthmatic patients, untransfected or transfected with AdIkappaBalphaM or AdLacZ (beta-galactosidase) for 24 h, were stimulated with anti-CD3 (1.0 microg/ml) plus anti-CD28 (0.5 microg/ml) monoclonal antibody for an additional 24 h. IkappaBalphaM transgene expression and NF-kappaB activation were detected by polymerase chain reaction (PCR), reverse transcription-PCR (RT-PCR), Western blot analysis, and electrophoretic mobility shift assay. Phenotype and apoptosis were measured by flow cytometry, annexin V binding, and terminal deoxyribonucleotidyl transferase-mediated dUTP nick end labeling analyses. Cytokine production and cell proliferation were determined using enzyme-linked immunosorbent assay and [(3)H] thymidine incorporation. RESULTS A unique 801-bp IkappaBalphaM cDNA and a dose-dependent increase in IkappaBalphaM transgene expression were observed in AdIkappaBalphaM-transfected CD45RO(+) T cells. Significantly, AdIkappaBalphaM inhibited CD3/CD28-mediated NF-kappaB activation in CD45RO(+) T cells, leading to evident apoptosis, reduction of eotaxin, RANTES, Th1 [interferon (IFN)-gamma and interleukin (IL)-2], and Th2 (IL-4, IL-5, and IL-13 despite a slight decrease in IL-10) cytokines and secondary proliferative response. AdIkappaBalphaM also upregulated cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) and downregulated CD69 besides no change in CD28. CONCLUSION IkappaBalphaM might be beneficial to augment memory CD4(+) T-cell tolerance through modulating B7-CD28/CTLA-4 co-stimulatory pathways and NF-kappaB-dependent cytokine profiles in allergic inflammatory diseases including asthma.
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481
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Erickson DJ, Mills RT, Gregg J, Blasing TJ, Hoffman FM, Andres RJ, Devries M, Zhu Z, Kawa SR. An estimate of monthly global emissions of anthropogenic CO2: Impact on the seasonal cycle of atmospheric CO2. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jg000435] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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482
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Yang X, Liu Q, Chen X, Zhu Z. Investigation on the formation mechanisms of hydrogels made by combination of γ-ray irradiation and freeze-thawing. J Appl Polym Sci 2008. [DOI: 10.1002/app.27832] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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483
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484
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Jiang T, Ma X, Wang Y, Zhu Z, Tong H, Hu J. Effects of hydrogen peroxide on human dentin structure. J Dent Res 2007; 86:1040-5. [PMID: 17959893 DOI: 10.1177/154405910708601104] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
It has been hypothesized that hydrogen peroxide (H(2)O(2)) bleaching may cause destruction of dentin by a mechanism of protein oxidation. However, to our knowledge, there has been no direct chemical evidence to validate this viewpoint. To investigate the effects of H(2)O(2) on the structure of human dentin, we used Fourier transform infrared spectroscopy (FTIR) and attenuated total reflection (ATR) spectroscopy. Human intact dentin specimens were treated either with 30% H(2)O(2) or Hanks' balanced salt solution (HBSS). Significant differences were observed in ATR spectra parameters. Additionally, demineralized dentin specimens were also tested. They were completely dissolved in the H(2)O(2), but remained intact in the 0.1 N HCl and HBSS. The results suggested that H(2)O(2) attacked both the organic and mineral components of dentin. Destruction of the organic components was mainly because of the oxidizing ability of H(2)O(2), while changes in the mineral components were probably due to its acidity.
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485
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Yi C, Zhu Z, Wei L, Cui Z, Zheng B, Shi Y. Advances in Numerical Dating of Quaternary Glaciations in China. ACTA ACUST UNITED AC 2007. [DOI: 10.1127/0372-8854/2007/0051s2-0153] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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486
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Zhao Y, Liu H, Kou Y, Li M, Zhu Z, Zhuang Q. Structural and characteristic analysis of carbon nanotubes-ionic liquid gel biosensor. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2007.07.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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487
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Tran TP, Frrokaj I, Albadawi H, Zhu Z, Watkins M, Muelleman R, Pipinos I. Mitochondrial Electron Transport Chain Defects in Acute Murine Hind Limb Ischemia/Reperfusion. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.1183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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488
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Liu Q, Zhu Z, Yang X, Chen X, Song Y. Temperature-sensitive porous membrane production through radiation co-grafting of NIPAAm on/in PVDF porous membrane. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2006.03.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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489
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Zhang L, Zang X, Xu J, Xie P, Zhu Z, Su J. Mercury bioaccumulation in fishes of three gorges reservoir after impoundment. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2007; 78:262-4. [PMID: 17492243 DOI: 10.1007/s00128-007-9117-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Accepted: 03/16/2007] [Indexed: 05/15/2023]
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490
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Zhu Z, Hofmann PA, Buolamwini JK. Cardioprotective effects of novel tetrahydroisoquinoline analogs of nitrobenzylmercaptopurine riboside in an isolated perfused rat heart model of acute myocardial infarction. Am J Physiol Heart Circ Physiol 2007; 292:H2921-6. [PMID: 17293492 DOI: 10.1152/ajpheart.01191.2005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have investigated the cardioprotective effects of novel tetrahydroisoquinoline nitrobenzylmercaptopurine riboside (NBMPR) analog nucleoside transport (NT) inhibitors, compounds 2 and 4, in isolated perfused rat hearts. Langendorff-perfused heart preparations were subjected to 10 min of treatment with compound 2, compound 4, or vehicle (control) followed by 30 min of global ischemia and 120 min of reperfusion. For determination of infarct size, reperfusion time was 180 min. At 1 microM, compounds 2 and 4 provided excellent cardioprotection, with left ventricular developed pressure (LVDP) recovery and end-diastolic pressure (EDP) increase of 82.9 +/- 4.0% (P<0.001) and 14.1 +/- 2.0 mmHg (P<0.03) for compound 2-treated hearts and 79.2 +/- 5.9% (P<0.002) and 7.5 +/- 2.7 mmHg (P<0.01) for compound 4-treated hearts compared with 41.6 +/- 5.2% and 42.5 +/- 6.5 mmHg for control hearts. LVDP recovery and EDP increase were 64.1 +/- 4.2% and 29.1 +/- 2.5 mmHg for hearts treated with 1 microM NBMPR. Compound 4 was the best cardioprotective agent, affording significant cardioprotection, even at 0.1 microM, with LVDP recovery and EDP increase of 76.0 +/- 4.9% (P<0.003) and 14.1 +/- 1.0 mmHg (P<0.03). At 1 microM, compound 4 and NBMPR reduced infarct size, with infarct area-to-total risk area ratios of 29.13 +/- 3.17 (P<0.001) for compound 4 and 37.5 +/- 3.42 (P<0.01) for NBMPR vs. 51.08 +/- 5.06% for control hearts. Infarct size was more effectively reduced by compound 4 than by NBMPR (P<0.02). These new tetrahydroisoquinoline NBMPR analogs are not only potent cardioprotective agents but are, also, more effective than NBMPR in this model.
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491
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Zhu Z, Zhu M, Li H. Wound healing and application of rhEGF in 29 burn cases with TBSA over 90% included ¢ó degree over 50%. Burns 2007. [DOI: 10.1016/j.burns.2006.10.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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492
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Zhu Z, Zhu M, Li W. Preventing donor of split skin scarring with epidermal grafting in people of Asia. Burns 2007. [DOI: 10.1016/j.burns.2006.10.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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493
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Oh S, Zheng T, Schroeder J, Vonakis B, Choi O, Zhu Z. Role of Mast Cells in the Development of Pulmonary Allergic Inflammation of SHP-1 Deficient Mice. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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494
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Zheng T, Oh S, Oh M, Wang M, Myers A, Schroeder J, Zhu Z. Overexpression of Interleukin 13 (IL-13) in the Skin Induces Dermatitis and Pulmonary Inflammation and Airway Hyperresponsiveness to Allergen Challenge. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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495
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Xie L, Zhu Z, MacDonald S. A Novel Inducible Transgenic Histamine Releasing Factor Construct. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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496
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Liu X, Zhao J, Li Y, Xu S, Zhu Z, Chen J, Wu G. The pH Rule for Fabricating Composite CoCu Nanowire Arrays. CHEM LETT 2007. [DOI: 10.1246/cl.2007.166] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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497
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Karajannis MA, Vincent L, Direnzo R, Shmelkov SV, Zhang F, Feldman EJ, Bohlen P, Zhu Z, Sun H, Kussie P, Rafii S. Activation of FGFR1beta signaling pathway promotes survival, migration and resistance to chemotherapy in acute myeloid leukemia cells. Leukemia 2006; 20:979-86. [PMID: 16598308 DOI: 10.1038/sj.leu.2404203] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fibroblast growth factors (FGFs) are important regulators of hematopoiesis and have been implicated in the tumorigenesis of solid tumors. Recent evidence suggests that FGF signaling through FGF receptors (FGFRs) may play a role in the proliferation of subsets of acute myeloid leukemias (AMLs). However, the precise mechanism and specific FGF receptors that support leukemic cell growth are not known. We show that FGF-2, through activation of FGFR1beta signaling, promotes survival, proliferation and migration of AML cells. Stimulation of FGFR1beta results in phosphoinositide 3-kinase (PI3-K)/Akt activation and inhibits chemotherapy-induced apoptosis of leukemic cells. Neutralizing FGFR1-specific antibody abrogates the physiologic and chemoprotective effects of FGF-2/FGFR1beta signaling and inhibits tumor growth in mice xenotransplanted with human AML. These data suggest that activation of FGF-2/FGFR1beta supports progression and chemoresistance in subsets of AML. Therefore, FGFR1 targeting may be of therapeutic benefit in subsets of AML.
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MESH Headings
- Acute Disease
- Aged, 80 and over
- Agouti-Related Protein
- Animals
- Antibodies/pharmacology
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Apoptosis/drug effects
- Cell Line, Tumor
- Cell Movement/drug effects
- Cell Proliferation/drug effects
- Cell Survival/drug effects
- Drug Resistance, Neoplasm/drug effects
- Fibroblast Growth Factor 2/pharmacology
- Humans
- Intercellular Signaling Peptides and Proteins/metabolism
- Leukemia, Myeloid/drug therapy
- Leukemia, Myeloid/genetics
- Leukemia, Myeloid/metabolism
- Male
- Mice
- Mice, SCID
- Phosphorylation
- Protein Subunits/drug effects
- Protein Subunits/metabolism
- RNA, Messenger/genetics
- Receptor, Fibroblast Growth Factor, Type 1/drug effects
- Receptor, Fibroblast Growth Factor, Type 1/genetics
- Receptor, Fibroblast Growth Factor, Type 1/metabolism
- Signal Transduction/drug effects
- Tumor Cells, Cultured
- Xenograft Model Antitumor Assays
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498
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Dikensoy O, Stathopoulos GT, Zhu Z, Light RW. D-dimer levels in pleural effusions. Respir Med 2006; 100:1337-41. [PMID: 16427265 DOI: 10.1016/j.rmed.2005.11.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Revised: 11/26/2005] [Accepted: 11/28/2005] [Indexed: 11/29/2022]
Abstract
INTRODUCTION D-dimer is a degradation product of cross-linked fibrin. We hypothesized that hemorrhagic pleural effusions would have greater D-dimer levels than non-hemorrhagic pleural effusions, and that persistently bloody effusions would be distinguishable from thoracentesis-induced bloody effusions by the D-dimer level. METHODS Forty pleural effusions were studied. D-dimer levels (measured by ELISA), red blood cell (RBC) count, white blood cell (WBC) count, lactate dehydrogenase (LDH), and protein level was measured for each effusion. Ten effusions, five non-bloody, and five bloody were studied for each of the following disease states: parapneumonic effusion, congestive heart failure, post-coronary artery bypass grafting, and lung cancer. RESULTS No significant difference of the D-dimer level was noted between bloody and non-bloody effusions of different disease states (P=0.286). There was no significant difference in the median D-dimer levels between all the bloody and all the non-bloody effusions (P=0.88). There was no significant difference (P=0.51) in D-dimer levels between five diseases groups when the bloody and non-bloody fluids were combined. The D-dimer levels did not correlate with the RBC count (r=0.11, P=0.48), WBC count (r=0.13, P=0.53), LDH (r=0.01, P=0.93), or protein levels (r=-0.01, P=0.93) in any of the groups. CONCLUSION Measurement of pleural fluid D-dimer levels does not distinguish persistently bloody effusions from non-bloody effusions, and does not aid in narrowing the differential diagnosis of an effusion.
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499
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Jin DK, Shido K, Kopp HG, Petit I, Shmelkov SV, Young LM, Hooper AT, Amano H, Avecilla ST, Heissig B, Hattori K, Zhang F, Hicklin DJ, Wu Y, Zhu Z, Dunn A, Salari H, Werb Z, Hackett NR, Crystal RG, Lyden D, Rafii S. Erratum: Corrigendum: Cytokine-mediated deployment of SDF-1 induces revascularization through recruitment of CXCR4+ hemangiocytes. Nat Med 2006. [DOI: 10.1038/nm0806-978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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500
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Harton SE, Stevie FA, Zhu Z, Ade H. Carbon-13 Labeled Polymers: An Alternative Tracer for Depth Profiling of Polymer Films and Multilayers Using Secondary Ion Mass Spectrometry. Anal Chem 2006; 78:3452-60. [PMID: 16689549 DOI: 10.1021/ac060133o] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
13C labeling is introduced as a tracer for depth profiling of polymer films and multilayers using secondary ion mass spectrometry (SIMS). Deuterium substitution has traditionally been used in depth profiling of polymers but can affect the phase behavior of the polymer constituents with reported changes in both bulk-phase behavior and surface and interfacial interactions. SIMS can provide contrast by examining various functional groups, chemical moieties, or isotopic labels. 13C-Labeled PS (13C-PS) and unlabeled PS (12C-PS) and PMMA were synthesized using atom-transfer radical polymerization and assembled in several model thin-film systems. Depth profiles were recorded using a Cameca IMS-6f magnetic sector mass spectrometer using both 6.0-keV impact energy Cs+ and 5.5-keV impact energy O2+ primary ion bombardment with detection of negative and positive secondary ions, respectively. Although complete separation of 12C1H from 13C is achieved using both primary ion species, 6.0-keV Cs+ clearly shows improved detection sensitivity and signal-to-noise ratio for detection of 12C, 12C1H, and 13C secondary ions. The use of Cs+ primary ion bombardment results in somewhat anomalous, nonmonotonic changes in the 12C, 12C1H, and 13C secondary ion yields through the PS/PMMA interface; however, it is shown that this behavior is not due to sample charging. Through normalization of the 13C secondary ion yield to the total C (12C + 13C) ion yield, the observed effects through the PS/PMMA interface can be greatly minimized, thereby significantly improving analysis of polymer films and multilayers using SIMS. Mass spectra of 13C-PS and 12C-PS were also analyzed using a PHI TRIFT I time-of-flight mass spectrometer, with 15-keV Ga+ primary ion bombardment and detection of positive secondary ions. The (12)C7(1)H7 ion fragment and its 13C-enriched analogues have significant secondary ion yields with negligible mass interferences, providing an early indication of the potential for future use of this technique for cluster probe depth profiling of high molecular weight 13C-labeled fragments.
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