76
|
Zheng G, Du L, Yang X, Zhang X, Wang L, Yang Y, Li J, Wang C. Serum microRNA panel as biomarkers for early diagnosis of colorectal adenocarcinoma. Br J Cancer 2014; 111:1985-92. [PMID: 25233400 PMCID: PMC4229633 DOI: 10.1038/bjc.2014.489] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 06/14/2014] [Accepted: 08/14/2014] [Indexed: 12/31/2022] Open
Abstract
Background: Currently, none of the available colorectal adenocarcinoma (CAC) testing has been established as a well-accepted diagnosis tool, particularly for the early stage of CAC. The recent discovery of serum microRNA (miRNA) profile has provided a new auxiliary approach for tumour diagnosis. Our study is involved in the global analysis of serum miRNAs during the normal–colorectal adenoma (CA)–CAC sequence. Methods: Serum samples were collected from 307 CAC patients, 164 CA patients and 226 healthy controls. Differentially expressed serum miRNAs were screened with Miseq sequencing followed by the reverse transcription PCR (RT–qPCR) validation. The miRNA panel was developed with a logistic regression model and validated using an independent cohort. The miRNA levels in CAC patients of different clinical stages and CA patients of different grades were compared. Receiver operating characteristic curves were constructed to evaluate the diagnostic accuracy of the panel. Results: The Miseq sequencing results revealed 15 differentially expressed miRNAs in the intersection of CAC vs CA and CA vs healthy controls according to our criteria. After the selection and validation process via RT–qPCR, we identified a four-miRNA panel (miR-19a-3p, miR-223-3p, miR-92a-3p and miR-422a) with a high diagnostic accuracy of CAC. Even in the low-carcinoembryonic antigen level group, the diagnostic accuracy of this miRNA panel was still acceptable (AUC=0.810). Surprisingly, our results indicated that the miRNA panel could differentiate stage I/II CAC from controls. In addition, this panel could also differentiate CA from CAC (AUC=0.886) and healthy controls (AUC=0.765). Conclusions: We established a serum four-miRNA panel with considerable clinical value in the early-stage diagnosis of CAC.
Collapse
|
77
|
Košir M, Zheng G, Grünewald M. Untersuchungen der Phasendistribution in Füllkörper- und Packungskolonnen mittels Gittersensor und Zellenmodell. CHEM-ING-TECH 2014. [DOI: 10.1002/cite.201450601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
78
|
Helgason B, S.Gilchrist, Ariza O, Chak J, Zheng G, Widmer R, Ferguson S, Guy P, Cripton P. Development of a balanced experimental–computational approach to understanding the mechanics of proximal femur fractures. Med Eng Phys 2014; 36:793-9. [DOI: 10.1016/j.medengphy.2014.02.019] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 02/11/2014] [Accepted: 02/14/2014] [Indexed: 10/25/2022]
|
79
|
Chen C, Xie W, Franke J, Grutzner P, Nolte LP, Zheng G. Automatic X-ray landmark detection and shape segmentation via data-driven joint estimation of image displacements. Med Image Anal 2014; 18:487-99. [DOI: 10.1016/j.media.2014.01.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 12/20/2013] [Accepted: 01/10/2014] [Indexed: 11/25/2022]
|
80
|
Schlusemann L, Zheng G, Grünewald M. Aufklärung der lokalen Phasenverteilung in Blasensäulen mithilfe gering-invasiver Messmethoden. CHEM-ING-TECH 2013. [DOI: 10.1002/cite.201250724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
81
|
Zhang S, Cao W, Zheng G, Jia Z, Shen C. Model and Numerical Simulation for the Second Penetration in Water-assisted Injection Molding. INT POLYM PROC 2013. [DOI: 10.3139/217.2491] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Unlike gas-assisted injection molding, subsequent penetration occurs on the radial direction after water displacing polymer melt in cavity due to the incompressibility and fast cooling of water in water-assisted injection molding. To simulate this second penetration, a dimensionless method was employed to simplify the governing equations for melt flow. Based on the reduced model, a formula was derived via mathematical inference to calculate the second penetration velocity and distance. In order to catch the huge temperature gradient at water-polymer interface, both polymer and water thermal conduct problems were founded and coupled at the interface. The finite element method was employed to solve the melt flow problem, and the finite difference method was used to discretize the energy equation. To verify the validity of the proposed model and algorithm, experiments were performed to measure the displacement of the water–melt interface for various melt temperatures and water pressures. The experimental results indicate that the primary penetration theory is not accurately on predicting residual wall thickness, whereas the combined primary and second penetration method significantly improve the accuracy.
Collapse
|
82
|
Tu YF, Fu QM, Niu XJ, Sang JP, Tan ZJ, Zheng G, Zou XW. Fabrication and photocatalytic property of ZnO/SrTiO3core/shell nanorod arrays. CRYSTAL RESEARCH AND TECHNOLOGY 2013. [DOI: 10.1002/crat.201200395] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
83
|
Schlusemann L, Zheng G, Grünewald M. Einsatz von Gittersensoren in Blasensäulen. CHEM-ING-TECH 2012. [DOI: 10.1002/cite.201250178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
84
|
Barbot JP, Zheng G, Floquet T, Boutat D, Richard JP. Delay estimation algorithm for nonlinear time-delay systems with unknown inputs. ACTA ACUST UNITED AC 2012. [DOI: 10.3182/20120622-3-us-4021.00032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
85
|
Zhou Y, Zheng H, Ruan F, Chen X, Zheng G, Kang M, Zhang Q, Sun X. Hydrogen-rich saline alleviates experimental noise-induced hearing loss in guinea pigs. Neuroscience 2012; 209:47-53. [PMID: 22387110 DOI: 10.1016/j.neuroscience.2012.02.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 02/08/2012] [Accepted: 02/15/2012] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To examine the efficiency of hydrogen-rich saline in the treatment of intensive noise-induced cochlear injury. MATERIALS AND METHODS Forty guinea pigs were assigned to one of four groups: HS+NOISE (i.p. injection hydrogen-rich saline), NS+NOISE (i.p. injection normal saline), NOISE ALONE (noise control), and NO TREATMENT (normal control) groups. The HS+NOISE, NS+NOISE, and NOISE ALONE groups were exposed to intensive noise (4 h at 115 dB SPL noise of 4000±100 Hz). The auditory brainstem response (ABR) was used to examine the hearing threshold in each group. Distortion product otoacoustic emission (DPOAE) was used to examine outer hair cell function. We also examined cochlear morphology to evaluate inner and outer hair cell trauma induced by noise exposure. Hydrogen-rich saline was administered twice daily for 6 days (2.5 ml/kg, i.p.) 24 h after noise exposure. RESULTS Baseline ABR thresholds and DPOAE values were normal in all groups at the measured frequencies (2, 4, 8, and 16 kHz) before noise exposure. The ABR threshold shift was 50-55 dB across the frequencies tested, and average DPOAE declined in the NOISE ALONE, NS+NOISE, and HS+NOISE groups 24 h after noise exposure. However, the changes in cochlear parameters were different between groups. The HS+NOISE group showed a significantly decreased ABR threshold value as compared with the NS+NOISE or NOISE ALONE group (P<0.01) on day 7. The mean DPOAE recovered to some extent in the three noise exposure groups, but at most frequencies the HS+NOISE group showed significantly increased DPOAE on day 7 as compared with the NS+NOISE group or NOISE ALONE group (P<0.01). Surface Corti organ preparations stained with succinate dehydrogenase (SDH) showed that most outer hair cells (OHCs) were still dropsical and a few were missing 7 days after noise exposure in the NS+NOISE group. Only a few OHCs were slightly dropsical in the HS+NOISE group. The numbers of missing hair cells 7 days after noise exposure were significantly greater in the NOISE ONLY and NS+NOISE groups than the HS+NOISE group (P<0.01). CONCLUSIONS Hydrogen-rich saline can alleviate experimental noise-induced hearing loss in guinea pigs, partially by preventing the death of cochlear hair cells after intensive noise exposure.
Collapse
|
86
|
Pan L, Liu HJ, Tan XJ, Lv HY, Shi J, Tang XF, Zheng G. Thermoelectric properties of armchair and zigzag silicene nanoribbons. Phys Chem Chem Phys 2012; 14:13588-93. [DOI: 10.1039/c2cp42645e] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
87
|
Xu HN, Zheng G, Nioka S, Chance B, Li LZ. High-resolution simultaneous mapping of mitochondrial redox state and glucose uptake in human breast tumor xenografts. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 737:175-9. [PMID: 22259099 PMCID: PMC5710752 DOI: 10.1007/978-1-4614-1566-4_26] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
88
|
Li Q, Zheng G, Tiwari R. Analysis of ordered categorical data with score averaging: with applications to case-control genetic associations. J Appl Stat 2011. [DOI: 10.1080/02664763.2010.529881] [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]
|
89
|
Zheng G, von Recum J, Nolte LP, Grützner PA, Steppacher SD, Franke J. Validation of a statistical shape model-based 2D/3D reconstruction method for determination of cup orientation after THA. Int J Comput Assist Radiol Surg 2011; 7:225-31. [DOI: 10.1007/s11548-011-0644-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 07/04/2011] [Indexed: 10/18/2022]
|
90
|
Moriyama E, Cao W, Liu T, Wang H, Zheng G, Wilson B. Novel optical probes for image-guided tumor resection and photodynamic therapy based on glucose transporters. Photodiagnosis Photodyn Ther 2011. [DOI: 10.1016/j.pdpdt.2011.03.112] [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]
|
91
|
Ba K, Li X, Wang H, Liu Y, Zheng G, Yang Z, Li M, Shimizutani K, Koseki T. Correlation between imaging features and epithelial cell proliferation in keratocystic odontogenic tumour. Dentomaxillofac Radiol 2011; 39:368-74. [PMID: 20729187 DOI: 10.1259/dmfr/27538271] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES this study was undertaken to investigate the relationship between radiographic appearance and epithelial cell proliferations in keratocystic odontogenic tumours (KCOTs). METHODS a retrospective radiographic analysis was performed on 284 cases of KCOT to gain insight into the radiographic characteristics. Expression of Ki-67 in 30 of the 284 cases was detected by the labelled streptavidin-biotin (LSAB) method and evaluated by an image analysis system. RESULTS the radiographic presentation of KCOT was divided into four types: unilocular, multilocular, multiple and naevoid basal cell carcinoma syndrome (NBCCS). The expression of Ki-67 in NBCCS was significantly different from the solitary and multiple KCOTs (P = 0.018, 0.002). In multilocular KCOTs it was also significantly different from the unilocular and syndrome-associated lesions (P = 0.000). In contrast, no significant differences were observed between the solitary and multiple lesions (P = 0.220). CONCLUSIONS a high correlation exists in KCOT between its biological behaviour and imaging features. The solitary KCOT seems less biologically aggressive and it should be classified as a cyst rather than a tumour. This means that more than half of KCOTs manifest themselves as ordinary cysts.
Collapse
|
92
|
Luo Y, Hu Y, Tan Y, Lai X, Shi J, He J, Zheng G, Zheng W, Xie W, Cai Z, Huang H. Virologic and Clinical Outcomes of Hepatitis B Virus Infection in Recipients Undergoing Unrelated-Donor Hematopoietic Stem Cell Transplantation. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.446] [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]
|
93
|
Luo Y, Tan Y, Hu Y, Shi J, Zheng G, Zheng W, Huang H. Clinical Outcomes of Haploidentical Donor Compared With Unrelated and Hla-Matched Related Donor Hematopoietic Stem Cell Transplantation for Hematologic Malignancies. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.217] [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]
|
94
|
Gao J, Liu J, Fan D, Xu H, Xiong Y, Wang Y, Xu W, Wang Y, Cheng Y, Zheng G. Up-regulated expression of Notch1 and Jagged1 in human colon adenocarcinoma. ACTA ACUST UNITED AC 2010; 59:298-302. [PMID: 21145176 DOI: 10.1016/j.patbio.2010.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Accepted: 11/02/2010] [Indexed: 12/30/2022]
Abstract
Deregulated expression of Notch molecules is observed in many malignant tumors, however, the expression of Notch1 and Jagged1 in colon adenocarcinoma is still unknown. This study is to investigate the expression of Notch1 and Jagged1 in human colon adenocarcinoma. Sixty-five human colon adenocarcinoma and 60 adjacent nontumor colon tissue sections were detected by immunohistochemistry. Ten paired fresh surgical human colon adenocarcinoma and adjacent nontumor colon samples were analyzed by Western blot and RT-PCR. Both Notch1 and Jagged1 were expressed in the cytoplasm of neoplastic cells of colon adenocarcinoma tissue. The protein and mRNA levels of both molecules were higher in colon adenocarcinoma than in adjacent nontumor tissue. Moreover, Notch1 was positively correlated with tumor stage. This investigation demonstrates that Notch1 and Jagged1 are up-regulated in human colon adenocarcinoma and suggests that Notch1/Jagged1 signaling might play a role in the development of colon adenocarcinoma.
Collapse
|
95
|
Zheng G, Schubert M, Kopatschek M, Hampel U, Grünewald M. Monitoring von Mehrphasenverteilungen in Packungskolonnen mittels Gittersensoren. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201050230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
96
|
Zheng G. First-principles study on the structural and electronic properties of double N atoms doped-rutile TiO 2. JOURNAL OF ATOMIC AND MOLECULAR SCIENCES 2010. [DOI: 10.4208/jams.110809.112909a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
97
|
Zheng G, Yampara-Iquise H, Jones JE, Andrew Carson C. Development of Faecalibacterium 16S rRNA gene marker for identification of human faeces. J Appl Microbiol 2010; 106:634-41. [PMID: 19200327 DOI: 10.1111/j.1365-2672.2008.04037.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS The focus of this study was to identify a bacterial 16S rRNA gene sequence, unique to microbiota in the human gut, for use in development of a dependable PCR assay to detect human faecal pollution in water. METHODS AND RESULTS Suppression subtractive hybridization (SSH) and bioinformatics were used to identify a genetic marker, within the 16S rRNA gene of Faecalibacterium, for the detection of human faeces. DNA sequencing analysis demonstrated that a majority (16) of 74 clones of the SSH library contained insertion sequences identified as Faecalibacterium 16S rRNA genes. Human faeces-specific sequences were derived and six PCR primer sets designed and tested against faecal DNA samples from human and nonhuman sources. One PCR primer set, HFB-F3 and HFB-R5, was exclusively associated with human faeces. These primers generated a human faeces-specific amplicon of 399 bp from 60.2% of human faecal samples and 100% of sewage samples. CONCLUSIONS The subject Faecalibacterium marker is specific for sewage. SIGNIFICANCE AND IMPACT OF THE STUDY This study represents the initial report of a Faecalibacterium marker for human faeces, which may prove useful for microbial source tracking.
Collapse
|
98
|
Yampara-Iquise H, Zheng G, Jones JE, Carson CA. Use of a Bacteroides thetaiotaomicron-specific alpha-1-6, mannanase quantitative PCR to detect human faecal pollution in water. J Appl Microbiol 2010; 105:1686-93. [PMID: 19149766 DOI: 10.1111/j.1365-2672.2008.03895.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The aims of this work were to develop a quantitative test, based on Bacteroides thetaiotaomicron, for human faecal pollution in water and to evaluate test performance. METHODS AND RESULTS qPCR primers, based on the complete genomic sequence of B. thetaiotaomicron VPI 5482, were designed and tested. The single-copy putative mannanase homologue, alpha-1-6 mannanase, was selected as the particular target and sequences within this gene chosen as the qPCR primers by Blast search for specificity to B. thetaiotaomicron. The average concentration of B. thetaiotaomicron in human faeces was 1.39 x 10(8) cells per gram faeces and the detection limit was 9.3 B. thetaiotaomicron copies per qPCR procedure. Comparison of B. thetaiotaomicron content in sewage vs pooled nonhuman faecal samples indicated that the current assay is specific for sewage. CONCLUSION The subject assay is potentially useful for quantification of sewage pollution in water. SIGNIFICANCE AND IMPACT OF THE STUDY Bacteroides-associated markers, proposed for faecal source tracking, have exclusively been based on gene sequences related to generally classified and uncultured bacteria. However, genes associated with host-microbe interaction have been suggested as more specific markers. The present assay targets such a gene of B. thetaiotaomicron which is considered to be a symbiont in the human gut.
Collapse
|
99
|
Hu BH, Cai Q, Manohar S, Jiang H, Ding D, Coling DE, Zheng G, Salvi R. Differential expression of apoptosis-related genes in the cochlea of noise-exposed rats. Neuroscience 2009; 161:915-25. [PMID: 19348871 DOI: 10.1016/j.neuroscience.2009.03.072] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Revised: 03/17/2009] [Accepted: 03/30/2009] [Indexed: 02/07/2023]
Abstract
Exposure to intense noise induces apoptosis in hair cells in the cochlea. To identify the molecular changes associated with noise-induced apoptosis, we used quantitative real-time PCR to evaluate the changes in 84 apoptosis-related genes in cochlear samples from the sensory epithelium and lateral wall. Sprague-Dawley rats exposed to a continuous noise at 115 dB SPL for 2 h. The exposure caused a 40-60 dB threshold shift 4 h post-exposure that decreased to 20-30 dB 7 days post-exposure. These functional changes were associated with apoptotic markers including nuclear condensation and fragmentation and terminal deoxynucleotidyl transferase dUTP nick end labeling staining. Immediately after the noise exposure, 12 genes were downregulated, whereas only one gene (Traf4) was upregulated. At 4 h post-exposure, eight genes were upregulated; three (Tnrsf1a, Tnfrsf1b, Tnfrst5) belonged to the Tnfrsf family, three (Bir3, Mcl1 and Prok2) have anti-apoptotic properties and one (Gadd45a) is a target of p53. At 7 days post-exposure, all the upregulated genes returned to pre-noise levels. Interestingly, the normal control cochlea had high constitutive levels of several apoptosis-related genes. These constitutively expressed genes, together with the inducible genes, may participate in the induction of cochlear apoptotic activity.
Collapse
|
100
|
|