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Luo Q, Cheng X, Holroyd T, Majestic C, Schechter J, Blair RJR. Emotional automaticity? It is a matter of timing --- spatiotemporal dynamics of the amygdala in the gamma band. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)72013-0] [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] Open
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327
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Tong Y, Chen Q, Barnett A, Das S, Reed J, Sambataro F, Cheng X, Weinberger D, Mattay V. An automated approach to control for intrasubject variability across fMRI sessions. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70527-0] [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] Open
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328
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Cheng X, Gupta A, Chen C, Tompkins RG, Rodriguez W, Toner M. Enhancing the performance of a point-of-care CD4+ T-cell counting microchip through monocyte depletion for HIV/AIDS diagnostics. LAB ON A CHIP 2009; 9:1357-64. [PMID: 19417901 PMCID: PMC4064257 DOI: 10.1039/b818813k] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
CD4+ T cell counts are important tests used to stage HIV-positive patients, enabling clinicians to make informed antiretroviral treatment decisions and to monitor the therapeutic outcomes. However, state-of-the-art CD4 counting methods based on flow cytometry are not applicable in resource-limited settings, due to their high cost and technical requirements. In previous work, we reported the development of a cell isolation microchip that can be used at the point of care for CD4 counts. In that microfluidic chip, CD4+ T cells were separated from 10 microL of whole blood, and enumerated via either light microscopy or impedance sensing. The microchip counts matched flow cytometry results in the intermediate CD4 count range, between 200-800 cells/microL, but displayed a positive bias at absolute CD4 counts below 200 cells/microL, due largely to monocyte contamination. To enhance the performance in the low CD4 count range, we report here an improved design of a two-stage microfluidic device to deplete monocytes from whole blood, followed by CD4+ T cell capture. Using the double-stage device combined with a high viscosity rinsing solution, we obtained microchip CD4 counts comparable to flow cytometry results in the full clinically relevant range. In addition to CD4 counting, the strategy of contaminant depletion prior to target cell isolation can be easily adapted to immunoaffinity capture of other cell types that lack a unique surface marker from a complex biological fluid.
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Cheng X, Jiang R, Li ZT, Tang J, Cai SM, Zhang ZY, Tian WJ, Zang RY. The role of secondary cytoreductive surgery for recurrent mucinous epithelial ovarian cancer (mEOC). Eur J Surg Oncol 2009; 35:1105-8. [PMID: 19443175 DOI: 10.1016/j.ejso.2009.03.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2008] [Revised: 03/21/2009] [Accepted: 03/24/2009] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Mucinous epithelial ovarian cancer (mEOC) may exhibit a distinct biological behavior in epithelial ovarian cancer (EOC). The role of secondary cytoreductive surgery was evaluated in patients with recurrent mEOC, and the prognosis was assessed. METHODS Twenty-one patients with stages IIc to IV mEOC who experienced disease recurrence and received secondary cytoreductive surgery at Fudan University Cancer Hospital between Jan. 1997 and Dec. 2005 were retrospectively reviewed. Survival curves were generated using the Kaplan-Meier method and the significant comparison of survival rate was estimated by the log-rank test. RESULTS The median progression-free interval (PFI) was 14 months (range, 5-46 months) after the first cytoreduction. Seven patients (33%) who received secondary cytoreductive surgery were optimally cytoreduced with residual disease less than or equal 1cm, and the other 14 patients (67%) underwent suboptimal surgical cytoreduction. The overall median survival time was 27 months (range, 8-64 months). The median survival time after recurrence was 10 months (range, 3-32 months). There was no significant statistical difference in median survival between patients with optimal and suboptimal secondary surgical cytoreduction, with an estimated survival of 10 months and 9.8 months, respectively (P>0.05). CONCLUSION Optimal primary cytoreductive surgery for advanced mEOC was very important. Once it recurs, the prognosis is very poor. Patients with recurrent mEOC should be carefully assessed before performing secondary cytoreductive surgery, as this may have limited impact on the overall survival rates.
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Sun H, Sun L, Li Y, Shao M, Cheng X, Ge N, Lu J, Li S. ACE-inhibitor Suppresses the Apoptosis Induced by Endoplasmic Reticulum Stress in Renal Tubular in Experimental Diabetic Rats. Exp Clin Endocrinol Diabetes 2009; 117:336-44. [DOI: 10.1055/s-0028-1112148] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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331
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Li H, Cheng X. First Identification of allergenic proteins from Pericarpium Zanthoxyli. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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332
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Yan T, Yang YN, Cheng X, DeAngelis MM, Hoh J, Zhang H. Genotypic Association Analysis Using Discordant-Relative-Pairs. Ann Hum Genet 2009; 73:84-94. [DOI: 10.1111/j.1469-1809.2008.00488.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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333
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Cheng X, Chen G, Rodriguez WR. Micro- and nanotechnology for viral detection. Anal Bioanal Chem 2009; 393:487-501. [PMID: 19052733 PMCID: PMC7080050 DOI: 10.1007/s00216-008-2514-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Revised: 10/31/2008] [Accepted: 11/04/2008] [Indexed: 12/27/2022]
Abstract
Since the identification of viruses at the start of the 20th century, detecting their presence has presented great challenges. In the past two decades, there has been significant progress in viral detection methods for clinical diagnosis and environmental monitoring. The earliest advances were in molecular biology and imaging techniques. Advances in microfabrication and nanotechnology have now begun to play an important role in viral detection, and improving the detection limit, operational simplicity, and cost-effectiveness of viral diagnostics. Here we provide an overview of recent advances, focusing especially on advances in simple, device-based approaches for viral detection.
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Liu X, Cheng X. Thermal-hydraulic and neutron-physical characteristics of a new SCWR fuel assembly. ANN NUCL ENERGY 2009. [DOI: 10.1016/j.anucene.2008.11.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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335
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Tachibana H, Cheng X, Tao Y, Fu Y, Yoshihara E, Tanabe K. Production and Modification of Human Monoclonal Antibody Fab Fragments to the 19-Kilodalton C-Terminal Merozoite Surface Protein 1 of Plasmodium falciparum. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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336
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Gu H, Cheng X, Yang Y. CFD analysis of thermal–hydraulic behavior in SCWR typical flow channels. NUCLEAR ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.nucengdes.2008.06.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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337
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Cheng X, Chen Y, Yang B, Feng M, Xu L, Tachibana H. Seroprevalence of Entamoeba histolytica Infection in China. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.1022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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338
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Li Z, Zhang LH, Zou HY, Cheng LH, Jin SZ, Wang DM, Cheng X. HLA-A*3318, a novel allele, identified by sequence-based typing in a Chinese individual. ACTA ACUST UNITED AC 2008; 72:600-2. [PMID: 19000130 DOI: 10.1111/j.1399-0039.2008.01150.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We report a novel human leucocyte antigen (HLA)-A allele, officially named as A*3318, which was found during high-resolution sequence-based typing in a Chinese potential hematopoietic stem cell transplantation donor. Compared with the HLA-A*330301 sequence, the A*3318 has one nucleotide substitution in exon 3: at nt 413 where A-->G resulting in an amino acid substitution from Q (CAG) to R (CGG) at codon 114.
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Zuo F, Luo C, Ding X, Zheng Z, Cheng X, Peng Y. Redox-responsive Inclusion Complexation between β-Cyclodextrin and Ferrocene-functionalized Poly(N-isopropylacrylamide) and its Effect on the Solution Properties of this Polymer. Supramol Chem 2008. [DOI: 10.1080/10610270701491227] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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340
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Wang Y, Qian G, Wang G, Cheng X, Bai C, Wang X. Potential therapy of Fc-antigen combination-encoding DNA vaccination in mouse allergic airway inflammation. Clin Exp Immunol 2008; 154:115-22. [PMID: 18727625 DOI: 10.1111/j.1365-2249.2008.03736.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Vaccination with allergen-encoding DNA has been proposed as having potential for allergen-specific immunotherapy. In this study, we examine the therapeutic effect of allergen-encoding DNA vaccination directly to dendritic cells (DCs) on allergen-induced allergic airway inflammation in a mouse model and explore potential mechanism. Ovalbumin (OVA)-sensitized and challenged mice were immunized with DNA vaccine and received bronchoalveolar lavage (BAL) 1 day after the last challenge, to measure BAL levels of interleukin (IL)-4, IL-5, interferon (IFN)-gamma and differential cell count. Pulmonary DCs and Spleen DCs were purified and sorted according to the expression of CD(11c) (+)CD(80) (+) and CD(11c) (+)CD(86) (+) co-stimulatory molecules. Our data demonstrated that DNA vaccine therapy with OVA-Fc-pcDNA(3.1) significantly prevented OVA-increased levels of IL-4, IL-5 and the percentage of eosinophils and OVA-decreased level of IFN-gamma. OVA-Fc-pcDNA(3.1)-treated mice had less severity of airway inflammation, and lower expression of CD(11c) (+)CD(80) (+) and CD(11c) (+)CD(86) (+) on pulmonary DCs, as compared with animals with OVA-pcDNA(3.1,) pcDNA(3.1) and OVA respectively. DNA vaccine encoding both Fc and OVA was shown to be more effective than DNA vaccine encoding OVA alone. Our data indicate that Fc-antigen combination-encoding DNA vaccination has better preventive effects on antigen-induced airway inflammation by regulating DCs, and may be a new alternative therapy for asthma.
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Loit E, Wu K, Cheng X, Hincke MT, Altosaar I. Functional whole-colony screening method to identify antimicrobial peptides. J Microbiol Methods 2008; 75:425-31. [PMID: 18708097 DOI: 10.1016/j.mimet.2008.07.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Revised: 07/19/2008] [Accepted: 07/19/2008] [Indexed: 11/26/2022]
Abstract
A high throughput method for screening cDNA libraries has been developed to identify putative antimicrobial peptides (AMPs). It is based on a rapid dye inclusion assay for assessing antagonism of bacterial viability. Colonies are grown on a membrane on a permissive medium until full colony size is reached. The membrane, supporting the array of colonies, is transferred onto an inductive medium containing a vital dye. Upon expression of any antagonizing peptides, the cell membrane becomes compromised allowing dye infusion to permit visual identification of deleterious peptides. Our approach was validated by screening a synthetic oligonucleotide library expressed in Escherichia coli. A random oligonucleotide library, containing inserts of up to 75 nucleotides in length was constructed and expressed in E. coli. From a potential pool of 100000 peptides, in a single round of screening, three were found to be antimicrobial: L1, L3, and L8. Peptide L1 was shown to have a concentration-dependent bactericidal effect against Gram-negative E. coli and moderate biostatic activity against the Gram-positive bacteria Listeria monocytogenes. L8 was found to have bacteriostatic, and possibly bactericidal effect against E. coli, Pseudomonas aeruginosa and Salmonella typhimurium. These results validated this high throughput AMP identification assay based on filter bound colony array libraries and vital dye inclusion.
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342
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Jiang R, Tang J, Cheng X, Zang RY. Surgical treatment for patients with different origins of Krukenberg tumors: outcomes and prognostic factors. Eur J Surg Oncol 2008; 35:92-7. [PMID: 18632244 DOI: 10.1016/j.ejso.2008.05.006] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2007] [Revised: 05/14/2008] [Accepted: 05/21/2008] [Indexed: 12/13/2022] Open
Abstract
AIMS We sought to investigate survival impacts of metastasectomy in women with Krukenberg tumors of the ovary and survival benefits in different origins (gastric cancer, colorectal cancer, or others). METHODS All patients diagnosed with Krukenberg tumors of the ovary who underwent surgical treatment at a single institution between 1997 and 2003 were retrospectively evaluated. Survival analyses and comparisons were performed using Kaplan-Meier method and log-rank test. RESULTS A total of 54 patients with Krukenberg tumors of the ovary were identified. The estimated 5-year survival was 12.1%. The median survival in patients with microscopic residual disease after metastasectomy was 29.6 months, compared to 10 months in those with visible residual disease (P<0.01). The median survival among patients with Krukenberg tumors of gastric origin, colon and rectum origin, and other origins were 13 months, 29.6 months, and 48.2 months, respectively (P=0.03). There was a significant difference in survival between patients with metastatic disease confined to the ovaries and those with extensive metastases, with an estimated median survival of 30.7 months and 10 months, respectively (P=0.02). Multivariate analysis suggested that the origin of ovarian metastatic carcinoma (P<0.01), residual disease after metastasectomy (P<0.01), and KPS (Karnofsky performance status) (P=0.03) were independent prognostic factors of survival. CONCLUSIONS Patients with Krukenberg tumors from colorectal cancer experience a better prognosis than those from gastric cancer and benefit more from metastasectomy. And metastasectomy significantly lengthens overall survival in patients with primary colorectal or breast cancer, higher KPS score, and those with optimal metastasectomy.
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Wang LE, An J, Liu Z, Lu K, Cheng X, Mills G, Wei Q. Messenger RNA expression and methylation of selected tumor- suppressor genes predict increased risk of ovarian cancer. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71873-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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344
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Fazio C, Gröschel F, Wagner W, Thomsen K, Smith B, Stieglitz R, Zanini L, Guertin A, Cadiou A, Henry J, Agostini P, Dai Y, Heyck H, Dementjev S, Panebianco S, Almazouzi A, Eikenberg J, Letourneau A, Toussaint J, Janett A, Perret C, Joray S, Patorski J, Leung W, Meloni P, Turroni P, Zucchini A, Benamati G, Konys J, Auger T, Gessi A, Gorse D, Serre I, Terlain A, Vogt JB, Batta A, Class A, Cheng X, Fellmoser F, Daubner M, Gnieser S, Grötzbach G, Milenkovic R, Latgé C, Knebel J. The MEGAPIE-TEST project: Supporting research and lessons learned in first-of-a-kind spallation target technology. NUCLEAR ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.nucengdes.2007.11.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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345
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Lang T, Koyama A, Li C, Li J, Lu Y, Saeed I, Gazze E, Keyak J, Harris T, Cheng X. Pelvic body composition measurements by quantitative computed tomography: association with recent hip fracture. Bone 2008; 42:798-805. [PMID: 18234578 DOI: 10.1016/j.bone.2007.12.002] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2007] [Revised: 11/19/2007] [Accepted: 12/03/2007] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Loss of subcutaneous fat, decreased muscle cross-sectional area (CSA) and increased muscle adiposity are related to declining physical function and disability in the elderly, but there is little information about the relationship of these tissue changes to hip fracture. Thus we have compared body composition measures in women with hip fractures to age-matched controls, using quantitative computed tomography (QCT) imaging of the hip to characterize total adiposity, muscle CSA and muscle attenuation coefficient, a measure of adiposity. MATERIALS AND METHODS 45 Chinese women (mean age 74.71+/-5.94) with hip fractures were compared to 66 healthy control subjects (mean age 70.70+/-4.66). Hip QCT scans were analyzed to compute total adipose CSA as well as CSA and attenuation values of muscle groups in the CT scan field of view, including hip extensors, abductors, adductors and flexors. The total femur areal BMD (aBMD) was estimated from the QCT images. Logistic regression was employed to compare body composition measures between fracture subjects and controls after adjustment for age, height, BMI and aBMD. Receiver-operator curve (ROC) analyses determined whether combinations of aBMD and body composition had higher area under curve (AUC) than aBMD alone. RESULTS AND CONCLUSIONS Fracture subjects had lower fat CSA (p<0.0001) than controls but had higher muscle adiposity as indicated by lower attenuation in the adductor, abductor and flexor groups (0.00001<p<0.02). Fracture subjects also had lower extensor and adductor CSA values (p<0.0001). After age and BMI adjustment, the total fat CSA, the extensor and adductor CSA values, and the adductor attenuation values remained significantly lower in the fracture subjects (0.001<p<0.05). In ROC analyses, models combining aBMD with soft tissue measures had higher AUC than models containing only BMD (0.001<p<0.05). Combining body composition with skeletal measures may improve fracture prediction compared to bone measures alone.
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Yu X, Cheng X, Liao Y, Xie J, Yao R, Chen Y, Ding Y, Tang T. P368 Prevention of hyperhomocysteinemia-induced endothelial dysfunction by poly(ADP-ribose) polymerase 1 inhibition in rats. Int J Cardiol 2008. [DOI: 10.1016/s0167-5273(08)70279-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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347
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Xie J, Cheng X, Liao Y, Yao R, Yu X, Chen Y, Ding Y, Tang T. P362 Poly (ADP-ribose) polymerase inhibition effects atherosclerotic plaque development and promotes factors of plaque stability in apolipoprotein E-deficient mice with hyperhomocysteinemia. Int J Cardiol 2008. [DOI: 10.1016/s0167-5273(08)70273-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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348
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Cheng X, Song Y, Liao Y, Li Y, Yuan J. P320 The effects of traditional drug Qiliqiangxin on inflammatory cytokines expression in rats with acute myocardial infarction. Int J Cardiol 2008. [DOI: 10.1016/s0167-5273(08)70231-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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349
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Cheng X, Yang Y. A point-hydraulics model for flow stability analysis. NUCLEAR ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.nucengdes.2007.06.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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350
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