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Yao F, Huang Y, Zhang Y, Dong Y, Ma H, Deng C, Lin H, Liu D, Lu K. Subclinical endothelial dysfunction and low-grade inflammation play roles in the development of erectile dysfunction in young men with low risk of coronary heart disease. ACTA ACUST UNITED AC 2012; 35:653-9. [PMID: 22519624 DOI: 10.1111/j.1365-2605.2012.01273.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The purpose of this study is to investigate the possible underlying pathogenesis of erectile dysfunction(ED) in young men with low risk of coronary heart disease and no well-known aetiology. To conduct this study, 122 patients with ED under the age of 40 were enrolled, along with 33 age-matched normal control subjects. The patients with ED had significantly higher levels of systolic blood pressure (SBP), total cholesterol and triglyceride, high sensitivity C-reactive protein (hs-CRP), greater carotid intima-media thickness (CIMT) and Framingham risk score (FRS) than the control group, though all of these values were within the respective normal range. Further, the brachial artery flow- mediated vasodilation (FMD) values were significantly lower in ED patients and correlated positively with the severity of ED (r = 0.714, p < 0.001). When these significant factors were studied in the multivariate logistic regression model, FMD, SBP, hs-CRP and FRS remained the statistical significance. The receiver-operating characteristic (ROC) analysis demonstrated that FMD had a high ability to predict ED in young male with low FRS [area under the curve (AUC) 0.921, p < 0.001]. The cutoff value of FMD <10.25% had sensitivity of 82.8% and specificity of 100% for diagnosis of ED. FRS and hs- CRP were also proven to be predictors of ED (AUC 0.812, p < 0.001; AUC 0.645, p = 0.011, respectively). The results of this study validated that subclinical endothelial dysfunction and low-grade inflammation may be the underlying pathogenesis of ED with no well-known aetiology. Young patients complaining of ED should be screened for cardiovascular risk factors and possible subclinical atherosclerosis. Measurement of FMD, hs-CRP and FRS can improve our ability to predict and treat ED, as well as subclinical cardiovascular disease early for young male.
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Affiliation(s)
- F Yao
- Division of Ultrasound, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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102
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Mei J, Wang J, Qin A, Zhao H, Yuan W, Zhao Z, Sung HHY, Deng C, Zhang S, Williams ID, Sun JZ, Tang BZ. Construction of soft porous crystal with silole derivative: strategy of framework design, multiple structural transformability and mechanofluorochromism. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm12673c] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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103
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Wess J, Duttaroy A, Zhang W, Gomeza J, Cui Y, Miyakawa T, Bymaster FP, Mckinzie L, Felder CC, Lamping KG, Faraci FM, Deng C, Yamada M. M 1 -M 5 Muscarinic Receptor Knockout Mice as Novel Tools to Study the Physiological Roles of the Muscarinic Cholinergic System. ACTA ACUST UNITED AC 2011. [DOI: 10.3109/10606820308262] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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104
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Deng C, Lin M, Hu C, Li Y, Gao Y, Cheng X, Zhang F, Dong M, Li Y. Exploring serological classification tree model of active pulmonary tuberculosis by magnetic beads pretreatment and MALDI-TOF MS analysis. Scand J Immunol 2011; 74:397-405. [PMID: 21668462 DOI: 10.1111/j.1365-3083.2011.02590.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Pulmonary tuberculosis (TB) is an infectious disease disturbing status of public health, and accurate diagnosis of TB would effectively help control the disturbance. Our study tried to establish a classification tree model that distinguished active TB from non-TB individuals. We used matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) combined with weak cationic exchange (WCX) magnetic beads to analyse 178 serum samples containing 75 patients with active TB and 103 non-TB individuals (43 patients with common pulmonary diseases and 60 healthy controls). Samples were randomly divided into a training set and a test set. Statistical softwares were applied to construct this model. An amount of 48 differential expressed peaks (P < 0.05) were identified by the training set, and our model was set up by three of them, m/z 7626, 8561 and 8608. This model can discriminate patients with active TB from patients with non-TB with a sensitivity of 98.3% and a specificity of 84.4%. The test set was used to verify the performance, which demonstrated good sensitivity and specificity: 85.7% and 83.3%, respectively. Differential expressed peaks between smear-positive and smear-negative active TB also have been analysed. It came out that m/z 8561 and 8608 not only acted as vital factors in the pathogenesis of active TB but also played an important role in regulating different active TB status. In conclusion, MALDI-TOF MS combined with WCX magnetic beads was a powerful technology for constructing classification tree model, and the model we built could serve as a potential diagnostic tool for active TB.
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Affiliation(s)
- C Deng
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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105
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Deng C, Xiao X, Yao N, Yang XB, Weng J. Effect of Surface Modification of Nano-Hydroxyapatite Particles on In Vitro Biocompatibility of Poly (ϵ-Caprolactone)–Matrix Composite Biomaterials. INT J POLYM MATER PO 2011. [DOI: 10.1080/00914037.2011.553847] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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106
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- V H Rao
- Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE 68178, USA
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107
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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. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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108
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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109
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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110
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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111
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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112
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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113
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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114
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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] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Q Leng
- Unit of Immune Regulation, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, PR China
| | - C Yang
- Unit of Immune Regulation, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, PR China
| | - K Zhu
- Unit of Immune Regulation, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, PR China
| | - C Deng
- Unit of Immune Regulation, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, PR China
| | - L Zhu
- Unit of Immune Regulation, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, PR China
| | - J Wan
- Unit of Immune Regulation, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, PR China
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115
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- Y Zhao
- Creighton University Medical Center, Omaha, NE
| | - C Deng
- Creighton University Medical Center, Omaha, NE
| | - W Lu
- Creighton University Medical Center, Omaha, NE
| | - J Xiao
- Creighton University Medical Center, Omaha, NE
| | - RR Recker
- Creighton University Medical Center, Omaha, NE
| | - GG. Guishan
- Creighton University Medical Center, Omaha, NE
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116
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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117
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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. J Mater Sci Mater Med 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- C Deng
- Institute of Silicon Materials, Leshan Teachers College, Leshan, 614004, China.
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118
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- I S J Merkies
- Department of Neurology, Spaarne Hospital, Hoofddorp, The Netherlands.
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119
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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120
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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121
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- M Han
- Centre for Translational Neuroscience, School of Health Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
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122
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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123
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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124
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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125
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126
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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: 235] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- A Dirksen
- Gentofte Hospital, Copenhagen University, Hellerup, Denmark.
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127
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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 and Engineering: C 2008. [DOI: 10.1016/j.msec.2008.01.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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128
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Liu Q, Barrón V, Torrent J, Eeckhout SG, Deng C. Magnetism of intermediate hydromaghemite in the transformation of 2-line ferrihydrite into hematite and its paleoenvironmental implications. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jb005207] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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129
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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130
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- W Zhang
- Parasitology Laboratory, Department of Veterinary Preventive Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China
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131
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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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Affiliation(s)
- Y Guo
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, PR China
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132
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Song G, Xiao J, Deng C, Zhang X, Hu Y. Use of solid-phase microextraction as a sampling technique for the characterization of volatile compounds emitted from Chinese daffodil flowers. J Anal Chem 2007. [DOI: 10.1134/s1061934807070118] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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133
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Abstract
Recent studies demonstrate that ultrasound can be used to deliver compounds into viable cells for potential targeted drug delivery and non-viral gene transfection, revealing new, advantageous possibilities. The delivery is facilitated through sonoporation, the formation of temporary pores in the cell membrane induced by ultrasound. Our study focuses on the study of sonoporation mechanisms in order to achieve optimal delivery outcome such as high delivery efficiency and minimal cell death. Using voltage clamp techniques, we obtained real-time measurements of sonoporation of single Xenopus oocytes in the presence of Optison, an agent consisting of albumin-shelled C3F8 gas bubbles. Ultrasound increased the transmembrane current as a direct result of decreased membrane resistance due to pore formation. The ability to real time monitor sonoporation of cells provides a novel and necessary tool for us to study the dynamic sonoporation process and obtain optimal delivery parameters. We confirmed the delivery of compound into cells by using markers such as plasmid GFP.
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Affiliation(s)
- H Pan
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
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134
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135
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136
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Cao Y, Deng C, Townsend C, Ko T. TGF-β inhibits Akt-induced transformation in intestinal epithelial cells. J Surg Res 2006. [DOI: 10.1016/j.jss.2005.11.086] [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: 10/25/2022]
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137
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138
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du Bois TM, Deng C, Bell W, Huang XF. Fatty acids differentially affect serotonin receptor and transporter binding in the rat brain. Neuroscience 2006; 139:1397-403. [PMID: 16600514 DOI: 10.1016/j.neuroscience.2006.02.068] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [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: 10/03/2005] [Revised: 01/30/2006] [Accepted: 02/22/2006] [Indexed: 11/24/2022]
Abstract
The aim of this study was to examine the influence of different fat diets on serotonin receptor and transporter binding. Male Sprague-Dawley rats were fed a diet of either high saturated fat, omega-6 polyunsaturated fatty acid, omega-3 polyunsaturated fatty acid or low fat (control) for eight weeks. Using Beta-Imager quantification techniques, [(3)H]ketanserin, [(3)H]mesulergine and [(3)H]paroxetine binding to serotonin (5-HT)(2A), 5-HT(2C) receptors and 5-HT transporters (5-HTT) was measured throughout the brain in all four groups. All three high fatty acid diets influenced serotonin receptor binding, however the most pronounced effects were that compared with the low fat control group, i) 5-HT(2A) receptor binding was increased in the caudate putamen, but reduced in the mammillary nucleus in high saturated fat and high omega-6 polyunsaturated fatty acid diet groups; ii) 5-HT(2C) receptor binding was reduced in the mamillary nucleus of saturated fat group and reduced in prefrontal cortex of the omega-6 polyunsaturated fatty acid and omega-3 polyunsaturated fatty acid groups; and iii) 5-HTT binding was reduced in the hippocampus in the omega-6 polyunsaturated fatty acid group. Overall, the omega-6 polyunsaturated fatty acid diet exerted the most influence on serotonin receptor and transporter binding. These results may be of importance in relation to neuropsychiatric diseases such as schizophrenia, where associations between altered fatty acid levels and the serotonergic system have been made.
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Affiliation(s)
- T M du Bois
- Neuroscience Institute for Schizophrenia and Allied Disorders, Neurobiology Research Centre for Metabolic and Psychiatric Disorders, Department of Biomedical Science, University of Wollongong, Wollongong, NSW, Australia.
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139
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Liu Q, Torrent J, Maher BA, Yu Y, Deng C, Zhu R, Zhao X. Quantifying grain size distribution of pedogenic magnetic particles in Chinese loess and its significance for pedogenesis. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2005jb003726] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qingsong Liu
- Paleomagnetism and Geochronology Laboratory (SKL-LE), Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
| | - José Torrent
- Departamento de Ciencias y Recursos Agrícolas y Forestales; Universidad de Córdoba; Córdoba Spain
| | - Barbara A. Maher
- Centre for Environmental Magnetism and Palaeomagnetism, Lancaster Environment Centre, Geography Department; Lancaster University; Lancaster UK
| | - Yongjae Yu
- Geosciences Research Division; Scripps Institution of Oceanography; La Jolla California USA
| | - Chenglong Deng
- Paleomagnetism and Geochronology Laboratory (SKL-LE), Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
| | - Rixiang Zhu
- Paleomagnetism and Geochronology Laboratory (SKL-LE), Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
| | - Xixi Zhao
- Department of Earth Sciences; University of California; Santa Cruz California USA
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140
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141
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Deng C. Mineral magnetic variation of the Jiaodao Chinese loess/paleosol sequence and its bearing on long-term climatic variability. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jb003451] [Citation(s) in RCA: 132] [Impact Index Per Article: 6.9] [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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142
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Rogers LJ, Deng C. Corticosterone treatment of the chick embryo affects light-stimulated development of the thalamofugal visual pathway. Behav Brain Res 2004; 159:63-71. [PMID: 15794999 DOI: 10.1016/j.bbr.2004.10.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2004] [Revised: 10/06/2004] [Accepted: 10/07/2004] [Indexed: 11/28/2022]
Abstract
By injecting a single 60 microg dose of corticosterone into the eggs of domestic chicks on day 18 of incubation, we have shown that elevated levels of this hormone affect the development of asymmetry in the visual projections from the thalamus to the Wulst regions in the left and right hemispheres of the forebrain. In vehicle-treated (control) embryos this visual pathway develops asymmetry in response to light stimulation during the final stages of incubation, when the embryo is oriented so that its left eye is occluded by its body and its right eye can be stimulated by light entering through the egg shell. Pre-hatching exposure to light leads to more projections from the left side of the thalamus to the right Wulst than from the right side of the thalamus to the left Wulst, as confirmed here by injection of the tracers Fluorogold and Rhodamine into the left and right Wulst followed by counting the number of labelled cell bodies in the thalamus (asymmetry greater in males than females). The chicks injected with corticosterone pre-hatching did not develop any group bias for asymmetry in response to light exposure before hatching. They were random with respect to presence/absence of lateralization and, when present, the lateralization was not as strong as in the controls and its direction was random. The corticosterone-treated group had fewer projections from the left side of the thalamus to the right Wulst than did the controls. The results are considered with respect to maternal deposits of the hormone in the yolk and pre-hatching stress of the embryo.
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Affiliation(s)
- L J Rogers
- Centre for Neuroscience and Animal Behaviour, University of New England, Armidale, NSW 2351, Australia.
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143
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Merritt S, Gulsen G, Chiou G, Chu Y, Deng C, Cerussi AE, Durkin AJ, Tromberg BJ, Nalcioglu O. Comparison of water and lipid content measurements using diffuse optical spectroscopy and MRI in emulsion phantoms. Technol Cancer Res Treat 2004; 2:563-9. [PMID: 14640767 DOI: 10.1177/153303460300200608] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We present a quantitative comparison of lipid and water signals obtained from broadband Diffuse Optical Spectroscopy (DOS) and Magnetic Resonance Imaging (MRI). DOS and MRI measurements were performed on an identical set of emulsion phantoms that were composed of different water/soybean oil fractions. Absolute concentrations of water and lipid ranging from 35-94% and 63-6%, respectively were calculated from quantitative broadband near-infrared (NIR) absorption spectra (650-1000 nm). MR images of fat and water were separated using the three-point Dixon technique. DOS and MRI measured water and lipid were highly correlated (R(2) = 0.98 and R(2) = 0.99, respectively) suggesting that these techniques are complementary over a broad range of physiologically relevant water and lipid values. In addition, comparison of DOS derived concentrations to the MRI "gold standard" technique validates our quantitation approach and permits estimation of DOS accuracy and sensitivity in vivo.
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Affiliation(s)
- S Merritt
- Laser Microbeam and Medical Program, Beckman Laser Institute, University of California Irvine, Irvine, California 92612, USA
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144
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Wess J, Duttaroy A, Zhang W, Gomeza J, Cui Y, Miyakawa T, Bymaster FP, McKinzie L, Felder CC, Lamping KG, Faraci FM, Deng C, Yamada M. M1-M5 muscarinic receptor knockout mice as novel tools to study the physiological roles of the muscarinic cholinergic system. Recept Channels 2004; 9:279-90. [PMID: 12893539] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
A large body of evidence indicates that muscarinic acetylcholine receptors (mAChRs) play critical roles in regulating the activity of many important functions of the central and peripheral nervous systems. However, identification of the physiological and pathophysiological roles of the individual mAChR subtypes (M(1)-M(5)) has proven a difficult task, primarily due to the lack of ligands endowed with a high degree of receptor subtype selectivity and the fact that most tissues and organs express multiple mAChRs. To circumvent these difficulties, we used gene targeting technology to generate mutant mouse lines containing inactivating mutations of the M(1)-M(5) mAChR genes. The different mAChR mutant mice and the corresponding wild-type control animals were subjected to a battery of physiological, pharmacological, behavioral, biochemical, and neurochemical tests. The M(1)-M(5) mAChR mutant mice were viable and reproduced normally. However, each mutant line displayed specific functional deficits, suggesting that each mAChR subtype mediates distinct physiological functions. These results should offer new perspectives for the rational development of novel muscarinic drugs.
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Affiliation(s)
- J Wess
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland 20892, USA.
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145
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Deng C, Zhu R, Verosub KL, Singer MJ, Vidic NJ. Mineral magnetic properties of loess/paleosol couplets of the central loess plateau of China over the last 1.2 Myr. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jb002532] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chenglong Deng
- Paleomagnetism Laboratory, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
| | - Rixiang Zhu
- Paleomagnetism Laboratory, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
| | | | - Michael J. Singer
- Department of Land, Air and Water Resources; University of California; Davis California USA
| | - Natasa J. Vidic
- Department of Geology; University of California; Davis California USA
- Department of Land, Air and Water Resources; University of California; Davis California USA
- Agronomy Department; University of Ljubljana; Ljubljana Slovenia
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146
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Wang RH, Li W, Xu X, Deng C. Mouse models for BRCA1-associated breast cancer. Breast Cancer Res 2003. [PMCID: PMC3300123 DOI: 10.1186/bcr662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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147
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Yamada M, Wess J, Duttaroy A, Zhang W, Gomeza J, Cui Y, Miyakawa T, Bymaster FP, McKinzie L, Felder CC, Lamping KG, Faraci FM, Deng C. M 1 -M 5 Muscarinic Receptor Knockout Mice as Novel Tools to Study the Physiological Roles of the Muscarinic Cholinergic System. ACTA ACUST UNITED AC 2003. [DOI: 10.1080/10606820308262] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [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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148
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Abstract
Apotyvirus isolated from perennial whitegrass ( Pennisetum centrasiaticum Tzvel.) in North China was characterized at the molecular level. The 3' terminal nucleotide (nt) sequence of 1669 nt of the viral RNA genome has been determined, which covered the coding region of the C-terminal part of the large nuclear inclusion protein (NIb, RNA polymerase), capsid protein (CP) gene and the 3' nontranslated region (NTR). The CP gene consisted of 909 nt (including the stop codon) encoding 302 amino acid residues, and the 3' NTR was 241 nt in length excluding the polyadenylated tract. Sequence comparison of the amino acids of CPs showed that this virus was most closely related to Sorghum mosaic virus and Maize dwarf mosaic virus with percent identities of 77% to 78% while that of the 3' NTRs suggested that it was most closely related to Zea mosaic virus with identity of 72%. This virus isolate was to some extent closely related to other members of the Sugarcane mosaic virus subgroup of potyviruses for the CP amino acid sequences. Phylogenetic analyses of the sequences indicated that this virus isolate represented a distinct potyvirus, and the name Pennisetum mosaic virus (PenMV) is proposed.
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Affiliation(s)
- Z Fan
- Department of Plant Pathology and National Laboratory for Agro-Biotechnology, China Agricultural University, Beijing, PR China.
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149
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Abstract
Although Smad 3 is known to serve as a signaling intermediate for the transforming growth factor beta (TGFbeta) family in nonreproductive tissues, its role in the ovary is unknown. Thus, we used a recently generated Smad 3-deficient (Smad 3-/-) mouse model to test the hypothesis that Smad 3 alters female fertility and regulates the growth of ovarian follicles from the primordial stage to the antral stage. In addition, we tested whether Smad 3 affects the levels of proteins that control apoptosis, survival, and proliferation in the ovarian follicle. To test this hypothesis, breeding studies were conducted using Smad 3-/- and wild-type mice. In addition, ovaries were collected from Smad 3-/- and wild-type mice on Postnatal Days 2-90. One ovary from each animal was used to estimate the total number of primordial, primary, and antral follicles. The other ovary was used for immunohistochemical analysis of selected members of the B-cell lymphoma/leukemia-2 family of protooncogenes (Bax, Bcl-2, Bcl-x), proliferating cell nuclear antigen (PCNA), and cyclin-dependent kinase 2 (Cdk-2). The results indicate that Smad 3-/- mice have reduced fertility compared with wild type mice. The results also indicate that Smad 3 may not affect the size of the primordial follicle pool at birth, but it may regulate growth of primordial follicles to the antral stage. Further, the results indicate that Smad 3 may regulate the expression of Bax and Bcl-2, but not Bcl-x, Cdk-2, and PCNA. Collectively, these data suggest that Smad 3 may play an important role in the regulation of ovarian follicle growth and female fertility.
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Affiliation(s)
- D Tomic
- Department of Pharmacology and Experimental Therapeutics, University of Maryland School of Medicine, 660 W. Redwood Street, Baltimore, MD 21201, USA
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150
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Lechleider RJ, Ryan JL, Garrett L, Eng C, Deng C, Wynshaw-Boris A, Roberts AB. Targeted mutagenesis of Smad1 reveals an essential role in chorioallantoic fusion. Dev Biol 2001; 240:157-67. [PMID: 11784053 DOI: 10.1006/dbio.2001.0469] [Citation(s) in RCA: 153] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Smad family of intracellular signaling intermediates transduce signals downstream from the transforming growth factor beta (TGF-beta) family of receptor serine threonine kinases. The original member of this family, Smad1, has been shown to mediate signals from receptors for the bone morphogenetic proteins (BMPs), a large group of ligands in the TGF-beta superfamily that mediate important developmental events. We have targeted the Smad1 gene in mice and created mutants null at this locus. Smad1 mutant mice die at approximately 9.5 days postcoitum due to defects in allantois formation. In Smad1 mutant mice, the allantois fails to fuse to the chorion, resulting in a lack of placenta and failure to establish a definitive embryonic circulation. Although vasculogenesis is initiated in the mutant allantois, the vessels formed are disorganized, and VCAM-1 protein, a marker for distal allantois development, is not expressed. Smad1 null fibroblasts are still able to respond to BMP2, however, suggesting that the defect observed in the developing extraembryonic tissue is caused by a very specific loss of transcriptional activity regulated by Smad1. Our data further demonstrate that although highly similar structurally, Smad proteins are not functionally homologous.
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Affiliation(s)
- R J Lechleider
- Department of Pharmacology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814-4799, USA.
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