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  • SAGE Publications  (20)
  • 2010-2014  (20)
  • 2010  (20)
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  • SAGE Publications  (20)
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  • 2010-2014  (20)
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  • 2010  (20)
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  • 1
    Online Resource
    Online Resource
    SAGE Publications ; 2010
    In:  Tumori Journal Vol. 96, No. 3 ( 2010-05), p. 465-472
    In: Tumori Journal, SAGE Publications, Vol. 96, No. 3 ( 2010-05), p. 465-472
    Abstract: The mechanisms of Epstein-Barr virus (EBV)-associated tumor development are incompletely understood. The aim of this study was to investigate the gene expression of EBV-associated lymphomas in hu-PBL/SCID mice. Methods Human peripheral blood lymphocytes (hu-PBL) from EBV-seropositive donors were transplanted into severe combined immunodeficiency (SCID) mice. In situ hybridization was used to detect EBV-encoded small RNA-1 (EBER1) in tumor tissues. Mutation of TP53 exons 5–8 in EBV-induced lymphomas was analyzed by PCR-SSCP. Immunohistochemical staining was used to examine EBV gene products and cellular oncoproteins. Results Twenty-one of 29 mice developed tumors. EBER1 was positive in the nuclei of almost all tumor cells. Immunohistochemistry showed positive staining of LMP1, EBNA2 and ZEBRA in a small number of tumor cells. Immunohistochemically detectable p53 protein expression was common (85.7%), but TP53 gene mutations were identified in only four cases (19.1%) of EBV-associated lymphomas. Positivity rates of C-myc, Bcl-2 and Bax expression were 100%, 95.2%, and 90.5%, respectively, in the 21 cases of EBV-associated lymphomas. Conclusions Our preliminary findings suggest that EBV-associated lymphomas in hu-PBL/SCID chimeras show EBV infection, expression of oncogenic viral genes, and overexpression of cellular oncogenes. TP53 gene mutations are rare but p53 protein is commonly expressed in EBV-associated lymphomas.
    Type of Medium: Online Resource
    ISSN: 0300-8916 , 2038-2529
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 280962-X
    detail.hit.zdb_id: 2267832-3
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  • 2
    In: Antiviral Therapy, SAGE Publications, Vol. 15, No. 8 ( 2010-11), p. 1171-1178
    Abstract: Antiviral drug-resistant HBV mutants under a variety of treatment protocols are complex and only partly understood. Here, a population-based cross-sectional study was performed to analyse the profile of resistance mutations in distinct evolutionary pathways refractory to different nucleoside/nucleotide analogues (NAs). Methods Serum samples of 199 chronic hepatitis B patients undergoing NA treatment from five hospitals in four northern cities of China were obtained between January 2007 and July 2009. The genotypic resistance of HBV in these samples was characterized. The full-length HBV reverse transcriptase region was amplified, sequenced and analysed with particular focus on the following NA-resistant changes: rtL80, rtI169, rtV173, rtL180, rtA181, rtT184, rtA194, rtS202, rtM204, rtN236 and rtM250. Results Among 199 HBV isolates, 30 (15.08%) and 169 (84.92%) were genotypes B and C, respectively, and 65 (32.66%) harboured NA-resistant mutations. The prevalence of mutations at rtM204 was 34.33% in 134 patients who had received or who had been exposed to lamivudine-based therapy. Five cases of rtN236 mutations were detected exclusively among 75 patients receiving adefovir-dipivoxil-based therapies. A total of 19 cases of multidrug resistance rtA181 mutations were observed in those with lamivudine-, adefovir-dipivoxil- or telbivudine-based treatment (186 cases), but not in those undergoing entecavir treatment (13 cases). Mutations were not found at rtI169, rtT184, rtA194 or rtS202. rtM204 mutations (27 rtM204I, 15 rtM204V and 5 rtM204I/V cases) were detected at the highest frequency among 65 mutants (72.30% [47/65]) and found to display 16 combination mutation patterns, in which rtM204I and rtM204V were significantly associated with rtL80I/V and rtL180M, respectively ( P 〈 0.01). Conclusions One-third of the studied population harboured NA-resistant HBV with complicated mutation patterns. Monitoring HBV genotypic resistance mutation markers and patterns is therefore shown to be beneficial for optimizing antiviral therapies and for avoiding clinical deterioration.
    Type of Medium: Online Resource
    ISSN: 1359-6535 , 2040-2058
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2118396-X
    SSG: 15,3
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  • 3
    In: Journal of Histochemistry & Cytochemistry, SAGE Publications, Vol. 58, No. 11 ( 2010-11), p. 979-988
    Abstract: Phosphorylation of fascin at serine 39 (phospho-S39-fascin) could inhibit its actin-binding and actin-bundling activities and decrease filopodia formation. However, the relationship between phospho-S39-fascin expression and clinicopathological parameters in tumors is still unknown. Here, Western blot analysis and IHC applied to tissue microarray technology were performed to examine the expression status of non-phosphorylated fascin (fascin) and phospho-S39-fascin and their impacts on the prognosis of patients with esophageal squamous cell carcinoma (ESCC). Fascin and phospho-S39-fascin expressions were tested by cytoplasmic staining. Among the 254 patients, 90 cases showed high expression of fascin and 87 cases showed high expression of phospho-S39-fascin. Survival analysis showed that high expression of fascin was significantly associated with a poor prognosis of the patients with ESCC ( p = 0.004). In contrast, high expression of phospho-S39-fascin correlated significantly with an improved outcome of patients ( p = 0.020). Multivariate analysis showed that both fascin and phospho-S39-fascin were independent prognostic factors. In a combined analysis, the patients with high expression of fascin and low expression of phospho-S39-fascin tumors had a shorter overall survival than those with high expression of both fascin and phospho-S39-fascin tumors (5-year overall survival rate: 28.7% vs 48.3%, p = 0.068). Our results suggest that high expression of fascin correlates with poor outcome and that high expression of phospho-S39-fascin decreases the risk of poor prognosis in ESCC. This manuscript contains online supplemental material at http://www.jhc.org . Please visit this article online to view these materials.
    Type of Medium: Online Resource
    ISSN: 0022-1554 , 1551-5044
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 1421306-0
    SSG: 12
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  • 4
    In: Gene Regulation and Systems Biology, SAGE Publications, Vol. 4 ( 2010-01), p. GRSB.S6065-
    Abstract: The protein phosphatase-2A (PP-2A), one of the major phosphatases in eukaryotes, is a heterotrimer, consisting of a scaffold A subunit, a catalytic C subunit and a regulatory B subunit. Previous studies have shown that besides regulating specific PP-2A activity, various B subunits encoded by more than 16 different genes, may have other functions. To explore the possible roles of the regulatory subunits of PP-2A in vertebrate development, we have cloned the PR55/B family regulatory subunits: β and δ, analyzed their tissue specific and developmental expression patterns in Goldfish ( Carassius auratus). Our results revealed that the full-length cDNA for PR55/Bβ consists of 1940 bp with an open reading frame of 1332 nucleotides coding for a deduced protein of 443 amino acids. The full length PR55/Bδ cDNA is 2163 bp containing an open reading frame of 1347 nucleotides encoding a deduced protein of 448 amino acids. The two isoforms of PR55/B display high levels of sequence identity with their counterparts in other species. The PR55/Bβ mRNA and protein are detected in brain and heart. In contrast, the PR55/Bδ is expressed in all 9 tissues examined at both mRNA and protein levels. During development of goldfish, the mRNAs for PR55/Bβ and PR55/Bδ show distinct patterns. At the protein level, PR55/Bδ is expressed at all developmental stages examined, suggesting its important role in regulating goldfish development. Expression of the PR55/Bδ anti-sense RNA leads to significant downregulation of PR55/Bδ proteins and caused severe abnormality in goldfish trunk and eye development. Together, our results suggested that PR55/Bδ plays an important role in governing normal trunk and eye formation during goldfish development.
    Type of Medium: Online Resource
    ISSN: 1177-6250 , 1177-6250
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2383407-9
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  • 5
    Online Resource
    Online Resource
    SAGE Publications ; 2010
    In:  Journal of Cerebral Blood Flow & Metabolism Vol. 30, No. 12 ( 2010-12), p. 1962-1971
    In: Journal of Cerebral Blood Flow & Metabolism, SAGE Publications, Vol. 30, No. 12 ( 2010-12), p. 1962-1971
    Abstract: Pre-B-cell colony-enhancing factor (PBEF) (also known as nicotinamide phosphoribosyltransferase) is a rate-limiting enzyme in the salvage pathway for mammalian biosynthesis of nicotinamide adenine dinucleotide (NAD + ). By synthesizing NAD + , PBEF functions to maintain an energy supply that has critical roles in cell survival. Cerebral ischemia is a major neural disorder with a high percentage of mortality and disability. Ischemia leads to energy depletion and eventually neuronal death and brain damage. This study investigated the role of PBEF in cerebral ischemia using a photothrombosis mouse model. Using immunostaining, we initially determined that PBEF is highly expressed in neurons, but not in glial cells in the mouse brain. To study the role of PBEF in ischemia in vivo, we used PBEF knockout heterozygous (Pbef+/−) mice. We showed that these mice have lower PBEF expression and NAD + level than do wild-type (WT) mice. When subjected to photothrombosis, Pbef+/− mice have significantly larger infarct volume than do age-matched WT mice at 24 hours after ischemia. Higher density of degenerating neurons was detected in the penumbra of Pbef+/− mice than in WT mice using Fluoro-Jade B staining. Our study shows that PBEF has a neuronal protective role in cerebral ischemia presumably through enhanced energy metabolism.
    Type of Medium: Online Resource
    ISSN: 0271-678X , 1559-7016
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2039456-1
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  • 6
    Online Resource
    Online Resource
    SAGE Publications ; 2010
    In:  Advances in Structural Engineering Vol. 13, No. 6 ( 2010-12), p. 1129-1138
    In: Advances in Structural Engineering, SAGE Publications, Vol. 13, No. 6 ( 2010-12), p. 1129-1138
    Abstract: Energy-based seismic evaluations of structures can give clear illustrations of seismic demands made upon structures. This paper presents a 3-dimensional energy-based modal pushover analysis (3D EMPA) method with equivalent three degree of freedom (ETDOF) system and equal-displacement rule. The lateral-rotational coupled effect on structures asymmetric in plan is considered using the energy-based modal pushover analysis (EMPA), which is more robust than the traditional Modal Pushover Analysis (MPA) procedure. The proposed procedure was validated against a nonlinear time history analysis of a 5-storey structure. The results show that the method is able to take higher mode effects into account and that the instability of capacity spectra will be avoided. The maximum deformation obtained from EMPA shows good agreement with a nonlinear time history analysis results of the original system. The proposed EMPA procedure appears to be reliable and effective for evaluating the seismic response of asymmetric-plan structures.
    Type of Medium: Online Resource
    ISSN: 1369-4332 , 2048-4011
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2026561-X
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  • 7
    Online Resource
    Online Resource
    SAGE Publications ; 2010
    In:  Integrative Cancer Therapies Vol. 9, No. 2 ( 2010-06), p. 213-218
    In: Integrative Cancer Therapies, SAGE Publications, Vol. 9, No. 2 ( 2010-06), p. 213-218
    Abstract: The effect of oxymatrine on the development of tolerance to the antinociceptive effects of morphine was investigated in rats. The degree of tolerance was assessed using the tail-flick test before and after 6 days of twice daily administration of oxymatrine premorphine (10/20/30 mg/kg). High doses of oxymatrine inhibited the development of morphine tolerance (resembling the effect of 7.5 mg/kg of the NMDA receptor antagonist memantine) while also increasing the antinociceptive effects. A high dose of oxymatrine (30 mg/kg) also significantly inhibited the dramatic increase in expression of morphine-induced P-glycoprotein (P-gp), an ATP-dependent efflux pump acting at the blood—brain barrier, by Western blot analysis. Furthermore, these studies suggest that P-gp modulates the development of morphine tolerance while not affecting the magnitude of the analgesic effect of morphine. These results imply that oxymatrine prevention of the development of tolerance of morphine may be related to a considerable inhibition of P-gp expression. In contrast, the authors’ data suggest that the mechanism of oxymatrine enhancement of morphine’s analgesic effects is not associated with increase in the level of expression of P-gp. However, they believe that their findings can be used by researchers to develop therapies that will allow patients to take morphine without becoming tolerant of its benefits.
    Type of Medium: Online Resource
    ISSN: 1534-7354 , 1552-695X
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2101248-9
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  • 8
    Online Resource
    Online Resource
    SAGE Publications ; 2010
    In:  Journal of Reinforced Plastics and Composites Vol. 29, No. 9 ( 2010-05), p. 1311-1322
    In: Journal of Reinforced Plastics and Composites, SAGE Publications, Vol. 29, No. 9 ( 2010-05), p. 1311-1322
    Abstract: The structure of T-stiffened skins molded integrally by co-curing or co-bonding is widely used in aircraft industry nowadays. Ongoing research focuses on the study of the compaction of simple structure composite components and the analysis of mechanical properties of T-stiffened skins. In this article, using carbon fiber/bismaleimide prepregs, T-stiffened skins were integrally fabricated by different tool assembly schemes in autoclave. The influence of tool assembly schemes and integral molding technologies on the compaction of T-stiffened skins was discussed in detail. A method of self-designing solid pressure testing was introduced to measure the pressure distribution upon T-stiffeners during cure process. The compaction of T-stiffeners was studied quantitatively by thickness distribution and analyzed qualitatively by pressure transferring. The experimental results showed that the pressure distribution in T-stiffeners was significantly influenced by tool assembly schemes and tool radii, which directly affected the compaction of T-stiffeners. The optimum assembly of rigid tool and triangle flexible tool with appropriate stiffness was adopted. In comparisons of co-curing and co-bonding, little difference of compaction in web and flange of T-stiffeners were found except higher thickness in corner section for co-curing.
    Type of Medium: Online Resource
    ISSN: 0731-6844 , 1530-7964
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2051886-9
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  • 9
    Online Resource
    Online Resource
    SAGE Publications ; 2010
    In:  Clinical and Applied Thrombosis/Hemostasis Vol. 16, No. 5 ( 2010-10), p. 579-583
    In: Clinical and Applied Thrombosis/Hemostasis, SAGE Publications, Vol. 16, No. 5 ( 2010-10), p. 579-583
    Abstract: Objectives: Cytochrome P450 (CYP) 2C19 is expressed in vascular endothelium and metabolizes arachidonic acid to biologically active epoxyeicosatrienoic acids (EETs), which are potent endogenous vasodilators and inhibitors of vascular inflammation. The purpose of this study is to explore the relationship between the interaction of CYP2C19*3 polymorphism and smoking and coronary artery disease (CAD) in a Uighur population. Methods: In a Chinese Uighur case-control study of patients with CAD (n = 336) and healthy controls (n = 370), we investigated the roles of polymorphism in the CYP2C19 gene by the use of polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) analysis. Results: The CYP2C19*3 AG + AA genotype was significantly more prevalent in patients with CAD (6.25.0% vs 2.96%; P = .03). Multiple logistic regression analysis showed 4 independent risk factors: the interaction of CYP2C19*3 and smoking (OR 7.22, 95% confidence interval [CI] 2.32-10.23; P = .009), smoking (OR 3.23, 95% CI 1.72-5.44; P = .003), blood sugar (OR 2.12, 95% CI 1.03-4.21; P 〈 .01), and hypertension (OR 1.74, 95% CI 0.98-2.34; P = .013). Conclusions: The CYP2C19*3 polymorphism and CAD were synergistically and significantly associated in Chinese Uighur patients.
    Type of Medium: Online Resource
    ISSN: 1076-0296 , 1938-2723
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2230591-9
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  • 10
    In: Clinical Medicine Insights: Cardiology, SAGE Publications, Vol. 4 ( 2010-01), p. CMC.S5659-
    Abstract: The study aims to explore the relationship between expressions of toll-like receptor 4 (TLR4) on peripheral blood monocytes, serum tumor necrosis factor-alpha (TNF-α) and matrix metalloproteinase-9 (MMP-9) in patients with acute coronary syndromes(ACS), and to investigate the possible mechanisms of Benazepril stabilizing atherosclerosis plaques. Methods 70 patients selected were randomly divided into Benazepril treatment group (35 patients) and regular treatment group (35 patients). Meanwhile, Stable angina pectoris (SAP) group of 32 patients and control group of 22 patients were also set up. With the help of flow-cytometry, expressions of TLR4 on peripheral blood monocytes of the four groups were analyzed and compared to show differences, correlations and changes of the above mentioned indicators. The concentration of TNF-α and MMP-9 in serum were measured by enzyme linked immunosorbent assay (ELISA). Results (1) Expressions of TLR4, levels of TNF-α and MMP-9 were increased and the rate was rising from the control group, to SAP group and then to ACS group. All these indicators in ACS group are significantly higher than those in other groups ( P 〈 0.05). (ACS versus SAP, control; all ( P 〈 0.05). (2) Multi-linear regression analysis indicates that there was a positive correlation between the expression level of TLR4 and serum levels of TNF-α and MMP-9 in patients with ACS ( P 〈 0.01). (3) There is no significant differences between the expression level of TLR4 and serum levels of TNF-α and MMP-9 in Benazepril treatment group and regular treatment group before treatment ( P 〉 0.05) while they all fell after treatment ( P 〈 0.05). In addition, all the indicators decreased more greatly than the regular treatment group. Conclusions TLR4 on peripheral blood monocytes and serum TNF-α and MMP-9 in patients with coronary arteriosclerosis disease may be effective markers of the vulnerable plaque. Benazepril can inhibit over-expression of TLR4 and reduce serum levels of TNF-α and MMP-9, thus stabilize the vulnerable plaques and improve the condition of the patients with ACS.
    Type of Medium: Online Resource
    ISSN: 1179-5468 , 1179-5468
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2575256-X
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