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Rao VH, Kandel A, Lynch D, Pena Z, Marwaha N, Deng C, Watson P, Hansen LA. A positive feedback loop between HER2 and ADAM12 in human head and neck cancer cells increases migration and invasion. Oncogene 2011; 31:2888-98. [PMID: 21986939 PMCID: PMC3302945 DOI: 10.1038/onc.2011.460] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Increased activation of epidermal growth factor receptor (EGFR) family members such as HER2/Erbb2 can result in more aggressive disease, resistance to chemotherapy and reduced survival of head and neck squamous cell carcinoma (HNSCC) patients. In order to identify mechanisms through which these receptor tyrosine kinases accelerate tumor progression, the regulation of metalloprotease expression by EGFR family members was investigated in 11 SCC cell lines. HER2 expression was significantly correlated with ADAM12 (A Disintegrin And Metalloprotease 12) expression in these cell lines and was co-expressed in human head and neck cancers. Inhibition of HER2 or EGFR decreased ADAM12 transcripts while HER2 transfection up-regulated ADAM12 expression. To understand the molecular mechanisms underlying HER2 regulation of ADAM12, we investigated the signaling pathways directing ADAM12 production in SCC cells. Inhibition of phosphatidyl inositol-3-kinase (PI3K) or mammalian Target of Rapamycin (mTOR) decreased ADAM12 transcripts in HER2-expressing SCC cells, while transfection with AKT increased ADAM12 mRNA. Experiments utilizing ADAM12 transfection or siRNA targeting of ADAM12 revealed that the protease increased both the migration and invasiveness of oral SCC cells. Surprisingly, ADAM12 also increased HER2 message, protein levels, and activity through an Ets1-dependent mechanism. Collectively, these results reveal a novel positive activation loop between ADAM12 and HER2 that may contribute to HNSCC progression.
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Yao F, Zhang Y, Huang Y, Ma H, Dong Y, Deng C, Lin H, Lu K. Subclinical endothelial dysfunction and low-grade inflammation play roles in the development of erectile dysfunction in young man with low risk of coronary heart disease. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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78
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Shukla P, Singh K, Quan A, Al-Omran M, Teoh H, Lovren F, Liu C, Rovira I, Pan Y, Brezden-Masley C, Deng C, Leong-Poi H, Stanford W, Parker T, Schneider M, Finkel T, Verma S. 728 BRCA1 induces cardiac protection through a P53-dependent pathway. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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79
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Deng C, Pemberton J. Five-Year Review of the Demographics and Clinical Outcomes of Aortic Valve (AV) Endocarditis at Auckland District Health Board (ADHB). Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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80
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Wang Y, Du X, Geng S, Weng J, Lu Z, Zhong L, Deng C, Lai P, Li Y, Huang X. 237 Detection and analysis of the DNA methylation in patients with myelodysplastic syndrome. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70239-9] [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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81
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Huang J, Du X, Weng J, Lu Z, Deng C, Zhou M, Zhong L. 114 A preliminary study on the application of diagnosis and prognosis of myelodysplastic syndromes by multiparametric flow cytometry immunophenotypic scoring system. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70116-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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82
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Deng C, Yang XB, Weng J. Fabrication and In Vitro Bioactivity of Poly (ϵ-caprolactone) Composites Filled with Silane-Modified Nano-Apatite Particles. INT J POLYM MATER PO 2011. [DOI: 10.1080/00914037.2010.531808] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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83
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Juhasz A, Sundaram A, Hoshino M, Lee T, Deng C, Fang X, Mittal S. Impact Of Histopathological Response To Neo-adjuvant Therapy On Survival And Disease Free Survival In Patients With Esophageal Adenocarcinoma. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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84
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Leng Q, Yang C, Zhu K, Deng C, Zhu L, Wan J. Pre-existing heterologous immunity to poliovirus vaccination may mitigate severity of hand, food and mouth disease caused by EV71. BMC Proc 2011. [PMCID: PMC3019451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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85
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Zhao Y, Deng C, Lu W, Xiao J, Recker RR, Guishan GG. Abstract P3-09-05: Let-7 microRNAs Regulate a Novel Variant of Estrogen Receptor Alpha, ER-≥36, Nongenomic Estrogen Signal Pathway, and Tamoxifen Resistance in Breast Cancer. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p3-09-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: MicroRNAs (miRNAs) have important regulatory functions in breast cancer tumorigenesis. We previously found that let-7 miRNAs were significantly downregulated in formalin-fixed paraffin-embedded (FFPE) breast cancer tissues.
Material and Methods: QRT-PCR was used to check let-7 family miRNAs in FFPE tissues and breast cancer cell lines as well as expression of estrogen receptor (ER)-≥36, a variant of ER-≥66, after let-7 miRNA transfecton. Immunoblot analysis was employed to check protein expression in FFPE tissue and breast cancer cell lines. Luciferase reporter assay was used to detect direct regulation of let-7 miRNA on ER-α expression. MTT assay was applied for cell proliferation after transfection of let-7 miRNAs. Results: We found that there was an inverse correlation between the expression of ER-≥36 and several members of let-7 family miRNAs in the FFPE tissue set. Let-7 miRNA sequences match sequence in the 3’ untranslated region (3’ UTR) of ER-≥36, indicating ER-≥36 may be a target of let-7. Cotransfection of let-7 mimics with ER-≥36 3’ UTR luciferase construct decreased the activity of reporter gene. Conversely, let-7 inhibitors enhanced the reporter gene activity. Transfection of let-7 mimics inhibited both the mRNA and protein levels of ER-≥36 and further inhibited the non-genomic estrogen pathway mediated by ER-≥36 in MDA-MB-231 cells. On the contrary, transfection of let-7 inhibitors enhanced the ER-≥36 expression at both mRNA and protein levels in 184A1 cells. The high expression of ER-≥36 in tamoxifen resistant MCF7 cells can be inhibited by transfection of let-7 mimics and sensitivity toward tamoxifen is enhanced.
Conclusion: Let-7 miRNAs regulate the expression of ER-≥36, which is involved in non-genomic estrogen pathway and tamoxifen resistance. Let-7 could be therapeutic target for breast cancer treatment.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P3-09-05.
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Zhang S, Deng C, Fu B, Yang S, Ma L. Effects of Cr doping on the electrochemical properties of Li2FeSiO4 cathode material for lithium-ion batteries. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.07.059] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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87
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Deng C, Weng J, Duan K, Yao N, Yang XB, Zhou SB, Lu X, Qu SX, Wan JX, Feng B, Li XH. Preparation and mechanical property of poly(ε-caprolactone)-matrix composites containing nano-apatite fillers modified by silane coupling agents. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:3059-3064. [PMID: 20886363 DOI: 10.1007/s10856-010-4158-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2009] [Accepted: 09/13/2010] [Indexed: 05/29/2023]
Abstract
This study aims to improve the tensile strength and elastic modulus of nano-apatite/poly(ε-caprolactone) composites by silane-modification of the nano-apatite fillers. Three silane coupling agents were used to modify the surfaces of nano-apatite particles and composites of silanized apatite and PCL were prepared by a technique incorporating solvent dispersion, melting-blend and hot-pressing. The results showed that the silane coupling agents successfully modified the surfaces of nano-apatite fillers, and the crystallization temperatures of the silanized apatite/PCL composites were the higher than that of the non-silanized control material, although the melting temperature of the composites remained almost unaffected by silanization. The ultimate tensile strength and elastic modulus of the silanized composites reached 22.60 MPa and 1.76 GPa, as a result of the improved interfacial bonding and uniform dispersion of nano-apatite fillers. This study shows that the processing technique and silanization of nano-apatite particles can effectively improve the tensile strength and elastic modulus of nano-apatite/PCL composites.
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Merkies ISJ, van Nes SI, Hanna K, Hughes RAC, Deng C. Confirming the efficacy of intravenous immunoglobulin in CIDP through minimum clinically important differences: shifting from statistical significance to clinical relevance. J Neurol Neurosurg Psychiatry 2010; 81:1194-9. [PMID: 20647554 DOI: 10.1136/jnnp.2009.194324] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND The ICE trial demonstrated the efficacy of immune globulin intravenous (IGIV-C) over placebo in chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). However, improving the interpretability of the results by analysing the minimum clinically important difference (MCID) had not been considered. OBJECTIVES To identify MCID thresholds of various outcome measures using different methods and to test treatment differences (IGIV-C vs placebo) using these thresholds. METHODS One anchor-based (Short Form-36 question 2) and three distribution-based (½ SD, 1 SE of measurement, and effect size) techniques were employed to identify MCID cut-offs for various impairments (electromyographic parameters, Medical Research Council (MRC) sum score, grip strength, inflammatory neuropathy cause and treatment (INCAT) sensory sum score), disability (INCAT scale score, Rotterdam handicap scale (RHS) score) and quality of life (SF-36). IGIV-C or placebo was administered every 3 weeks for up to 24 weeks to 117 CIDP patients. Patients who did not improve by ≥1 point on the INCAT scale received alternate treatment. The proportion of patients with results exceeding identified MCID thresholds was compared. Results MCID cut-offs for outcomes were determined using each method. For the INCAT disability scale (primary ICE-trial outcome), all MCID methods identified significantly more responders with IGIV-C than placebo. Significant differences favouring IGIV-C were also demonstrated for various nerve conduction parameters, MRC sum score, grip strength, RHS score and SF-36 physical component summary score. CONCLUSION In addition to being statistically significant, all MCID analyses showed that CIDP improvements with IGIV-C are clinically meaningful. Consideration of MCID is recommended in future therapeutic trials. Trial Registration Number NCT00220740 (http://ClinicalTrials.gov).
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Zhang S, Deng C, Fu B, Yang S, Ma L. Doping effects of magnesium on the electrochemical performance of Li2FeSiO4 for lithium ion batteries. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2009.11.035] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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90
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Tu X, Zhao L, Deng L, Wang W, Zhao L, Liang H, Zheng L, Deng C. UP-2.064: The Diagnosis and Surgical Treatment for Obstructive Azoospermia: Report of 56 Cases. Urology 2009. [DOI: 10.1016/j.urology.2009.07.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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91
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Han M, Huang XF, du Bois TM, Deng C. The effects of antipsychotic drugs administration on 5-HT1A receptor expression in the limbic system of the rat brain. Neuroscience 2009; 164:1754-63. [PMID: 19778583 DOI: 10.1016/j.neuroscience.2009.09.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Revised: 09/08/2009] [Accepted: 09/16/2009] [Indexed: 11/26/2022]
Abstract
Increasing evidence suggests that 5-HT1A receptors are involved in the pathophysiology and treatment of schizophrenia. This paper investigated 5-HT1A receptor mRNA expression and binding density in female rats treated with aripiprazole (2.25 mg/kg/day), olanzapine (1.5 mg/kg/day), haloperidol (0.3 mg/kg/day) or vehicle (control) orally three times/day for 1 or 12 weeks. Animals were sacrificed 48 h after the last administration. Aripiprazole significantly increased 5-HT1A receptor binding density by 33% in the CA1 region of the hippocampus and by 21% in the medial posterodorsal nuclei of posterior amygdala (MeP) compared to the control group after 1 week of treatment. Olanzapine significantly decreased 5-HT1A receptor binding density by 17-22% in Layers I-IV of the cingulate cortex after 1 week of treatment. Neither of these antipsychotic drugs affected 5-HT1A receptor binding density after 12 weeks drug treatment. As expected, haloperidol treatment did not have any significant effect on 5-HT1A binding density after 1 or 12 weeks of treatment. 5-HT1A receptor mRNA expression was not altered by antipsychotic treatment in any brain region. The results indicate that aripiprazole and olanzapine have differential effects on 5-HT1A receptor expression, which may contribute to their distinct profiles in improving negative symptoms and cognitive deficits in schizophrenia. Aripiprazole and olanzapine may produce adaptation and desensitization of 5-HT1A receptor expression after long term treatment.
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92
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Bareiss B, Merrett K, Deng C, Harden J, Li F, Diaz-Mitoma F, Griffith M. O59 Corneal substitutes with anti-microbial peptides for ocular HSV treatment. Int J Antimicrob Agents 2009. [DOI: 10.1016/s0924-8579(09)70206-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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93
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Deng C, Zhang S, Wu B, Yang SY, Li HQ. Synthesis and characteristics of nanostructured Li(Co1/3Ni1/3Mn1/3)O2 cathode material prepared at 0 °C. J Solid State Electrochem 2009. [DOI: 10.1007/s10008-009-0874-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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94
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Merkies I, Bril V, Dalakas MC, Deng C, Donofrio P, Hanna K, Hartung HP, Hughes RA, Latov N, van Doorn PA. Health-related quality-of-life improvements in CIDP with immune globulin IV 10%: The ICE Study. Neurology 2009; 72:1337-44. [DOI: 10.1212/wnl.0b013e3181a0fd80] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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95
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Ye Q, Deng C. Determination of Camphor and Borneol in Flos Chrysanthemi Indici by UAE and GC-FID. J Chromatogr Sci 2009; 47:287-90. [DOI: 10.1093/chromsci/47.4.287] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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96
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Dirksen A, Piitulainen E, Parr DG, Deng C, Wencker M, Shaker SB, Stockley RA. Exploring the role of CT densitometry: a randomised study of augmentation therapy in alpha1-antitrypsin deficiency. Eur Respir J 2009; 33:1345-53. [PMID: 19196813 DOI: 10.1183/09031936.00159408] [Citation(s) in RCA: 236] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Assessment of emphysema-modifying therapy is difficult, but newer outcome measures offer advantages over traditional methods. The EXAcerbations and Computed Tomography scan as Lung End-points (EXACTLE) trial explored the use of computed tomography (CT) densitometry and exacerbations for the assessment of the therapeutic effect of augmentation therapy in subjects with alpha(1)-antitrypsin (alpha(1)-AT) deficiency. In total, 77 subjects (protease inhibitor type Z) were randomised to weekly infusions of 60 mg x kg(-1) human alpha(1)-AT (Prolastin) or placebo for 2-2.5 yrs. The primary end-point was change in CT lung density, and an exploratory approach was adopted to identify optimal methodology, including two methods of adjustment for lung volume variability and two statistical approaches. Other end-points were exacerbations, health status and physiological indices. CT was more sensitive than other measures of emphysema progression, and the changes in CT and forced expiratory volume in 1 s were correlated. All methods of densitometric analysis concordantly showed a trend suggestive of treatment benefit (p-values for Prolastin versus placebo ranged 0.049-0.084). Exacerbation frequency was unaltered by treatment, but a reduction in exacerbation severity was observed. In patients with alpha(1)-AT deficiency, CT is a more sensitive outcome measure of emphysema-modifying therapy than physiology and health status, and demonstrates a trend of treatment benefit from alpha(1)-AT augmentation.
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Deng C, Weng J, Lu X, Zhou S, Wan J, Qu S, Feng B, Li X. Preparation and in vitro bioactivity of poly(d,l-lactide) composite containing hydroxyapatite nanocrystals. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2008.01.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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98
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Deng C, Liu L, Zhou W, Sun K, Sun D. Effect of synthesis condition on the structure and electrochemical properties of Li[Ni1/3Mn1/3Co1/3]O2 prepared by hydroxide co-precipitation method. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.10.025] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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99
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Zhang W, Deng C, Liu Q, Liu J, Wang M, Tian KG, Yu XL, Hu DM. First identification of Neospora caninum infection in aborted bovine foetuses in China. Vet Parasitol 2007; 149:72-6. [PMID: 17706874 DOI: 10.1016/j.vetpar.2007.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2006] [Revised: 06/28/2007] [Accepted: 07/02/2007] [Indexed: 10/22/2022]
Abstract
The first identification of Neospora caninum infection in the tissues of aborted bovine foetuses in China is reported. Aborted foetuses were collected from 16 dams, and 12 of the dams had high serum antibody titres to N. caninum determined using an ELISA test kit. The Nc-5 gene of N. caninum was amplified from DNA samples extracted from brains of four aborted foetuses using a Neospora-specific PCR assay, confirming N. caninum infection in the aborted foetuses. Histology and immunohistochemistry showed thick-walled (3 microm) tissue cyst in 25 microm diameter in the brain of one foetus. Non-suppurative encephalomyelitis, focal haemorrhage, hepatic lesions consisted of lymphocyte infiltration and haemorrhage were also found in the heart and lung of the foetus. Thus, we have confirmed for the first time the infection of N. caninum in aborted foetuses of cattle in the People's Republic of China.
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Guo Y, Zhu N, Zhu S, Deng C. Molecular phylogenetic diversity of bacteria and its spatial distribution in composts. J Appl Microbiol 2007; 103:1344-54. [PMID: 17897238 DOI: 10.1111/j.1365-2672.2007.03367.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To investigate microbial diversity of swine manure composts in the initial stage and the spatial distribution due to gradient effect. METHODS AND RESULTS Samples in different locations of a composting pile were taken and analysed by using a culture-independent approach. Total community DNA was extracted and bacterial 16S rRNA genes were subsequently amplified, cloned, restriction fragment length polymorphism-screened and sequenced. Thirty-three unique sequence types were found among the 110 analysed positive clones from superstratum sample; 56 among 122 from middle-level sample and 32 among 114 from substrate sample, respectively. The sequences related to Clostridium sp. were most common in the composts. One hundred and thirteen out of 121 16S rDNA sequence types displayed homology with those in the GenBank database. Seven 16S rDNA sequence types were not closely related to any known species. The middle-level sample had the highest microbial diversity, containing unique sequences related to Lactosphaera pasteurii, Firmicutes sp., Aerococcus sp., Megasphaera sp. and Stenotrophomonas sp. CONCLUSIONS Pile temperature significantly affected microbial community in the initial stage of the composting. Microbial community in different locations is quite different resulting from gradient effect. SIGNIFICANCE AND IMPACT OF THE STUDY Results of this study reveal high bacterial diversity in manure composts, and provide molecular evidence to support gradient effect on microbial diversity in initial stage as well.
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