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Zhang LT, Wei FJ, Zhao Y, Zhang Z, Dong WT, Jin ZN, Gao F, Gao NN, Cai XW, Li NX, Wei W, Xiao FS, Yue SY, Zhang JN, Yang SY, Li WD, Yang XY. Intracranial aneurysm risk factor genes: relationship with intracranial aneurysm risk in a Chinese Han population. GENETICS AND MOLECULAR RESEARCH 2015; 14:6865-78. [PMID: 26125895 DOI: 10.4238/2015.june.18.30] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Few studies have examined the genes related to risk fac-tors that may contribute to intracranial aneurysms (IAs). This study in Chinese patients aimed to explore the relationship between IA and 28 gene loci, proven to be associated with risk factors for IA. We recruited 119 patients with aneurysms and 257 controls. Single factor and logistic regression models were used to analyze the association of IA and IA rup-ture with risk factors. Twenty-eight single nucleotide polymorphisms (SNPs) in 22 genes were genotyped for the patient and control groups. SNP genotypes and allele frequencies were analyzed by the chi-square test. Logistic regression analysis identified hypertension as a factor that increased IA risk (P = 1.0 x 10(-4); OR, 2.500; 95%CI, 1.573-3.972); IA was associated with two SNPs in the TSLC2A9 gene: rs7660895 (P = 0.007; OR, 1.541; 95%CI, 1.126-2.110); and in the TOX gene: rs11777927 (P = 0.013; OR, 1.511; 95%CI, 1.088-2.098). Subsequent removal of the influence of family relationship identified between 12 of 119 patients enhanced the significant association of these SNPs with IA (P = 0.001; OR, 1.691; 95%CI, 1.226-2.332; and P = 0.006; OR, 1.587; 95%CI, 1.137-2.213 for rs7660895 and rs11777927, respectively). Fur-thermore, the minor allele of rs7660895 (A) was also associated with IA rupture (P = 0.007; OR, 2.196; 95%CI, 1.230-3.921). Therefore, hypertension is an independent risk factor for IA. Importantly, the TSL-C2A9 (rs7660895) and TOX (rs11777927) gene polymorphisms may be associated with formation of IAs, and rs7660895 may be associated with IA rupture.
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Wei FL, Wang JH, Ding G, Yang SY, Li Y, Hu YJ, Wang SL. Mechanical force-induced specific MicroRNA expression in human periodontal ligament stem cells. Cells Tissues Organs 2015; 199:353-63. [PMID: 25823370 DOI: 10.1159/000369613] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2014] [Indexed: 01/14/2023] Open
Abstract
It remains unclear how the expression of microRNAs (miRNAs) in human periodontal ligament stem cells (PDLSCs) might respond to mechanical stretch. To investigate specific miRNA expression in stretched PDLSCs, we used a Flexcell® FX-5000™ tension system to achieve external mechanical stimulation. Then, a custom-designed microarray assay was performed to investigate and describe the genome-wide differential expression of miRNAs in normal and stretched PDLSCs. Finally, we implemented integrative miRNA target prediction and network analysis approaches to construct an interaction network of the key miRNAs and their putative targets. We found that stretching induced morphological changes and increased alkaline phosphatase (ALP) activity, runt-related transcription factor 2 (RUNX2), osteocalcin (OCN), and bone sialoprotein (BSP) expression in PDLSCs. The microarray data showed that 53 miRNAs were differentially expressed with stretching. With an interaction network, we examined the connections between 10 selected key miRNAs and their putative target genes, which were related to mechanical force. The results from the interaction network provided a basis for postulating the functional roles of miRNAs in PDLSCs.
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Zhang GL, Yang SY, Zhu ZL, Mu PX. Meta-analysis on postoperative complications of wristband acupoint pressure therapy. J BIOL REG HOMEOS AG 2015; 29:187-193. [PMID: 25864757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Through searching database such as MEDLINE, CNKI, etc., this paper assesses the effect of wristband acupoint pressure, acting on the neiguan acupoint, to relieve postoperative complications of adults (mainly nausea and vomiting) using nine randomized controlled trials (RCT) and RevMan5.0. In the experimental group, acupoint pressure wristband effectively reduced the incidence rate of postoperative vomiting by acting on the neiguan point, compared to the placebo control group (RR=0.50, 95% CI: 0.37~0.66, P < 0.01). As to the incidence rate of postoperative nausea, there was no statistical significance between the experimental group and the placebo control group (RR=0.85, 95% CI: 0.72~1.00, P < 0.05). It was revealed that the application of acupoint pressure wristband on neiguan point in postoperative care could effectively relieve postoperative vomiting; while postoperative vomiting was not relieved distinctly. Therefore, researchers are required to carry out more reliable RCT test for further study and discussion, and nurses can bring in acupoint pressure wristband for researches on its effectiveness and adaptability.
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Hernández-Frederick CJ, Giani AS, Cereb N, Sauter J, Silva-González R, Pingel J, Schmidt AH, Ehninger G, Yang SY. Identification of 2127 new HLA class I alleles in potential stem cell donors from Germany, the United States and Poland. ACTA ACUST UNITED AC 2014; 83:184-9. [PMID: 24571476 PMCID: PMC4199310 DOI: 10.1111/tan.12304] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 01/13/2014] [Accepted: 01/13/2014] [Indexed: 11/28/2022]
Abstract
We describe 2127 new human leukocyte antigen (HLA) class I alleles found in registered stem cell donors. These alleles represent 28.9% of the currently known class I alleles. Comparing new allele sequences to homologous sequences, we found 68.1% nonsynonymous nucleotide substitutions, 28.9% silent mutations and 3.0% nonsense mutations. Many substitutions occurred at positions that have not been known to be polymorphic before. A large number of HLA alleles and nucleotide variations underline the extreme diversity of the HLA system. Strikingly, 156 new alleles were found not only multiple times, but also in carriers of various parentage, suggesting that some new alleles are not necessarily rare. Moreover, new alleles were found especially often in minority donors. This emphasizes the benefits of specifically recruiting such groups of individuals.
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Yang SY, Oh YK, Ahn HS, Kwak WS. Maintenance Crude Protein Requirement of Penned Female Korean Spotted Deer (Cervus nippon). ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2014; 27:30-5. [PMID: 25049923 PMCID: PMC4093281 DOI: 10.5713/ajas.2013.13474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 10/09/2013] [Accepted: 09/16/2013] [Indexed: 11/27/2022]
Abstract
This study was conducted to evaluate the protein requirement for maintenance of 2-year-old female Korean spotted deer. In the course of the experiment, each of three hand-reared female spotted deer was fed three diets that were iso-calorically formulated to contain low (approximately 7%), medium (12%), and high (17%) levels of crude protein (CP). Each of six trials included a 5-day transition, a 10-day preliminary, and a 7-day collection period. Dietary protein levels affected the apparent digestibility of CP (p<0.05) but not the apparent digestibility of dry matter, organic matter, or acid detergent fiber. All of the deer showed a positive CP balance on all of the diets. The maintenance CP requirement estimated by regression analysis was 4.17 g/kg metabolic body weight (W0.75)·d. The maintenance digestible CP requirement was 1.42 g/kg W0.75·d. The metabolic fecal CP was 1.95 g/kg W0.75·d. The blood urea nitrogen of spotted deer increased (p<0.05) as the dietary protein levels increased.
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Zhu GH, Wang ST, Yao MZ, Cai JH, Chen CY, Yang ZX, Hong L, Yang SY. Screening of the residual normal ovarian tissue adjacent to orthotopic epithelial ovarian carcinomas in nude mice. GENETICS AND MOLECULAR RESEARCH 2014; 13:2978-86. [PMID: 24782132 DOI: 10.4238/2014.april.16.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The objective of this study was to explore the feasibility and methods of screening the residual normal ovarian tissue adjacent to orthotopic ovarian carcinomas in nude mice. Human epithelial ovarian cancer cells (OVCAR3) were subcutaneously implanted for a tumor source and ovarian orthotopic transplantation. The cancer tissue, proximal paraneoplastic tissue, middle paraneoplastic tissue, remote paraneoplastic tissue, and normal ovarian tissue were removed. CK-7, CA125, p53, survivin, MMP-2, and TIMP-2 expression was detected by reverse transcription polymerase chain reaction. We obtained 35 paraneoplastic residual ovarian tissues with normal biopsies from 40 cases of an orthotopic epithelial ovarian carcinoma model (87.5%). CK-7, CA125, p53, survivin, MMP-2, and TIMP-2 expression was lower in proximal paraneoplastic tissue than in cancer tissue (P < 0.05) and higher than in middle and remote paraneoplastic tissue (P < 0.01). There was no statistically significant difference between the expression of these genes in middle and proximal paraneoplastic tissue as well as among residual normal ovarian tissues with different severity (P > 0.05). In ovarian tissues of 20 normal nude mice, the expression of CK- 7, CA125, p53, survivin, MMP-2, and TIMP-2 was negative. Overall, the expression levels of CK-7, CA125, p53, survivin, MMP-2, TIMP-2, and other molecular markers showed a decreasing trend in the non-cancer tissue direction. The expression levels can be used as standards to screen residual normal ovarian tissue. We can obtain relatively safe normal ovarian tissues adjacent to epithelial ovarian cancer.
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Chao CT, Yang SY, Huang JW. Peritoneal dialysis peritonitis caused by Enterococcus avium. Perit Dial Int 2014; 33:335-6. [PMID: 23660613 DOI: 10.3747/pdi.2012.00166] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Liu X, Zhu F, Ma XH, Shi Z, Yang SY, Wei YQ, Chen YZ. Predicting targeted polypharmacology for drug repositioning and multi- target drug discovery. Curr Med Chem 2013; 20:1646-61. [PMID: 23410165 DOI: 10.2174/0929867311320130005] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 10/05/2012] [Accepted: 10/12/2012] [Indexed: 11/22/2022]
Abstract
Prediction of polypharmacology of known drugs and new molecules against selected multiple targets is highly useful for finding new therapeutic applications of existing drugs (drug repositioning) and for discovering multi-target drugs with improved therapeutic efficacies by collective regulations of primary therapeutic targets, compensatory signalling and drug resistance mechanisms. In this review, we describe recent progresses in exploration of in-silico methods for predicting polypharmacology of known drugs and new molecules by means of structure-based (molecular docking, binding- site structural similarity, receptor-based pharmacophore searching), expression-based (expression profile/signature similarity disease-drug and drug-drug networks), ligand-based (similarity searching, side-effect similarity, QSAR, machine learning), and fragment-based approaches that have shown promising potential in facilitating drug repositioning and the discovery of multi-target drugs.
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Ma XH, Zhu F, Liu X, Shi Z, Zhang JX, Yang SY, Wei YQ, Chen YZ. Virtual screening methods as tools for drug lead discovery from large chemical libraries. Curr Med Chem 2013; 19:5562-71. [PMID: 23016548 DOI: 10.2174/092986712803833245] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Revised: 09/13/2012] [Accepted: 09/14/2012] [Indexed: 11/22/2022]
Abstract
Virtual screening methods have been developed and explored as useful tools for searching drug lead compounds from chemical libraries, including large libraries that have become publically available. In this review, we discussed the new developments in exploring virtual screening methods for enhanced performance in searching large chemical libraries, their applications in screening libraries of ~ 1 million or more compounds in the last five years, the difficulties in their applications, and the strategies for further improving these methods.
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Song JW, Shim JK, Song Y, Yang SY, Park SJ, Kwak YL. Effect of ketamine as an adjunct to intravenous patient-controlled analgesia, in patients at high risk of postoperative nausea and vomiting undergoing lumbar spinal surgery. Br J Anaesth 2013; 111:630-5. [PMID: 23744819 DOI: 10.1093/bja/aet192] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND We evaluated the effect of ketamine as an adjunct to a fentanyl-based i.v. patient-controlled analgesia (IV-PCA) on postoperative nausea and vomiting (PONV) in patients at high risk of PONV undergoing lumbar spinal surgery. METHODS Fifty non-smoking female patients were evenly randomized to either the control or ketamine group. According to randomization, patients received either ketamine 0.3 mg kg(-1) i.v. or normal saline after anaesthetic induction with fentanyl-based IV-PCA either with or without ketamine mixture (3 mg kg(-1) in 180 ml). The incidence and severity of PONV, volume of IV-PCA consumed, and pain intensity were assessed in the postanaesthesia care unit, and at postoperative 6, 12, 24, 36, and 48 h. RESULTS The overall incidence of PONV during the first 48 h after surgery was similar between the two groups (68 vs 56%, ketamine and control group, P=0.382). The total dose of fentanyl used during the first 48 h after operation was lower in the ketamine group than in the control group [mean (SD), 773 (202) μg vs 957 (308) μg, P=0.035]. The intensity of nausea (11-point verbal numerical rating scale) was higher in the ketamine group during the first 6 h after operation [median (interquartile range), 6 (3-7) vs 2 (1.5-3.5), P=0.039], postoperative 12-24 h [5 (4-7) vs 2 (1-3), P=0.014], and postoperative 36-48 h [5 (4-7) vs 2 (1-3), P=0.036]. Pain intensities were similar between the groups. CONCLUSIONS Ketamine did not reduce the incidence of PONV and exerted a negative influence on the severity of nausea. It was, however, able to reduce postoperative fentanyl consumption in patients at high-risk of PONV.
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Moon JS, Cheong NR, Yang SY, Kim IS, Chung HJ, Jeong YW, Park JC, Kim MS, Kim SH, Ko HM. Lipopolysaccharide-induced indoleamine 2,3-dioxygenase expression in the periodontal ligament. J Periodontal Res 2013; 48:733-9. [PMID: 23488665 DOI: 10.1111/jre.12063] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2013] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND OBJECTIVE Indoleamine 2,3-dioxygenase (IDO) is a tryptophan-oxidizing enzyme with immune-inhibitory effects. The aim of this study was to investigate the expression of IDO by lipopolysaccharide (LPS), a component of gram-negative bacteria, in human periodontal ligament (PDL) cells. MATERIAL AND METHODS Human PDL cells and gingival fibroblasts (GFs) were prepared from explants of human PDLs and from gingival tissues of clinically healthy donors, respectively. Real-time RT-PCR, western blotting and the IDO enzyme assay were performed to determine the expression of IDO following LPS treatment of cells. LPS was injected into mice tail veins to evaluate the effects of LPS in vivo in the maxillary first molar. Immunofluorescence staining and histological analysis were followed to localize IDO in mouse PDL. RESULTS The level of expression of IDO mRNA in primary human PDL cells after LPS treatment was increased in a dose-dependent manner, reaching a peak 8 h after LPS treatment. The expression and activities of IDO protein were significantly increased in comparison with those of the control. In addition, the increased production of kynurenine in culture medium was observed 72 h after LPS treatment. In the immunofluorescence findings, stronger immunoreactivities were shown in PDL than in gingival tissues in the maxillae. In accordance with the immunofluorescence findings, LPS treatment induced a strong up-regulation of IDO mRNA in human PDL cells, whereas human GFs showed only a weak response to LPS. CONCLUSION These results clearly show that IDO was induced by LPS in primary human PDL cells, suggesting that PDL might be involved in the regulation of oral inflammatory disease.
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Yang SY, Yang CC, Horng HE, Shih BY, Chieh JJ, Hong CY, Yang HC. Experimental study on low-detection limit for immunomagnetic reduction assays by manipulating reagent entities. IEEE Trans Nanobioscience 2013; 12:65-8. [PMID: 23392387 DOI: 10.1109/tnb.2013.2240009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The low limit of detection (LLD) plays an important role in biomolecular assays, especially for early-stage assays. Biomolecular detections usually involve the use of two main elements: a reagent and an analyzer, which both greatly contribute to the LLD. In this work, the relationships among the LLD and reagent-related factors are investigated. The to-be-detected biomolecule is c-reactive protein (CRP) as an example. The assay method is immunomagnetic reduction (IMR). The components of reagent are Fe(3)O(4) magnetic nanoparticles bio-functionalized with antibodies against CRP, dispersed in pH-7.4 phosphate buffered saline solution. Several key factors of the reagent, such as particle concentration, volume ratio of reagent to sample, and particle size, are manipulated to optimize the LLD of detecting CRP.
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Zhang GQ, Yang SY, Niu LL, Guo DW. Structure and polymorphism of 16 novel Y-STRs in Chinese Han population. GENETICS AND MOLECULAR RESEARCH 2012; 11:4487-500. [PMID: 23096913 DOI: 10.4238/2012.october.11.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Y-chromosome short tandem repeats (Y-STRs) are useful tools for identifying paternity origin and male-female mixed samples because of their male-specificity, haploid inheritance and relatively simplicity. We focused on novel Y-STRs deposited in the human Genome database from DYS708 to DYS726. We typed 16 male-specific Y-STRs from males of a Chinese Han population residing in Shanxi Province (north China), including DYS708-719, DYS721-723, and DYS726, but failed in typing DYS720, DYS724 and DYS725. The 16 Y-STRs, with mean gene diversity (GD) of 0.79, included three trinucleotide Y-STRs (711, 718, 719), nine tetranucleotide STRs (708, 709, 710, 712, 713, 715, 722, 723, 726) and four pentanucleotide repeat STRs (714, 716, 717, 721). DYS712, consisting of eight alleles, was the most informative STR in our population, with a GD of 0.843. The STRs were classified as simple STRs and complex STRs, according to their structures based on sequencing. Genetic indexes, including allele frequencies, haplotype distribution and male-specificity were determined. The Y-STRs, especially those male-specific, tetra- and penta-nucleotide, with only one copy on Y-chromosome, and relative simple structures, such as DYS709, DYS714, DYS715, DYS716, DYS718, DYS719, and DYS726, were suggested for the future forensic DNA analysis, while DYS724 and DYS725 were not recommended for their multi-copy distribution. The population data provided putative Y-STRs for future genetic and forensic applications.
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Yang KL, Lee SK, Yang SY, Kao RH, Lin CL, Lin PY. Discovery of HLA-DRB1*03:20 allele in a Taiwanese volunteer hematopoietic stem cell donor and the probable HLA-A, -B, -C and -DRB1 haplotype in association with DRB1*03:20. Int J Immunogenet 2012; 40:243-5. [PMID: 22925692 DOI: 10.1111/j.1744-313x.2012.01151.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 07/23/2012] [Accepted: 07/25/2012] [Indexed: 11/29/2022]
Abstract
The allele HLA-DRB1*03:20, a variant of DRB1*03, was first reported to the IMGT HLA database in April 2001 without indication on the ethnicity of the blood donor (Cell ID: HC 125775). We found a Taiwanese volunteer hematopoietic stem cell donor carries DRB1*03:20 by a sequence-based typing (SBT) method. The DNA sequence of DRB1*03:20 is identical to the sequence of DRB1*03:01:01 in exon 2, except a nucleotide substitution at position 341(T→C) (GTT→GCT at codon 85). The nucleotide replacement produced an amino acid variation at residue 85 (V→A). We hypothesize that DRB1*03:20 was probably derived from DRB1*03:01:01 via a nucleotide point mutation event. The probable HLA haplotype in association with DRB1*03:20 was deduced as A*11:02-B*58:01-C*07:02-DRB1*03:20. We here report the Taiwanese/Chinese ethnicity of DRB1*03:20.
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Lubk A, Rossell MD, Seidel J, He Q, Yang SY, Chu YH, Ramesh R, Hÿtch MJ, Snoeck E. Evidence of sharp and diffuse domain walls in BiFeO3 by means of unit-cell-wise strain and polarization maps obtained with high resolution scanning transmission electron microscopy. PHYSICAL REVIEW LETTERS 2012; 109:047601. [PMID: 23006107 DOI: 10.1103/physrevlett.109.047601] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Indexed: 06/01/2023]
Abstract
Domain walls (DWs) substantially influence a large number of applications involving ferroelectric materials due to their limited mobility when shifted during polarization switching. The discovery of greatly enhanced conduction at BiFeO(3) DWs has highlighted yet another role of DWs as a local material state with unique properties. However, the lack of precise information on the local atomic structure is still hampering microscopical understanding of DW properties. Here, we examine the atomic structure of BiFeO(3) 109° DWs with pm precision by a combination of high-angle annular dark-field scanning transmission electron microscopy and a dedicated structural analysis. By measuring simultaneously local polarization and strain, we provide direct experimental proof for the straight DW structure predicted by ab initio calculations as well as the recently proposed theory of diffuse DWs, thus resolving a long-standing discrepancy between experimentally measured and theoretically predicted DW mobilities.
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Yu P, Luo W, Yi D, Zhang JX, Rossell MD, Yang CH, You L, Singh-Bhalla G, Yang SY, He Q, Ramasse QM, Erni R, Martin LW, Chu YH, Pantelides ST, Pennycook SJ, Ramesh R. Interface control of bulk ferroelectric polarization. Proc Natl Acad Sci U S A 2012; 109:9710-5. [PMID: 22647612 PMCID: PMC3382509 DOI: 10.1073/pnas.1117990109] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The control of material interfaces at the atomic level has led to novel interfacial properties and functionalities. In particular, the study of polar discontinuities at interfaces between complex oxides lies at the frontier of modern condensed matter research. Here we employ a combination of experimental measurements and theoretical calculations to demonstrate the control of a bulk property, namely ferroelectric polarization, of a heteroepitaxial bilayer by precise atomic-scale interface engineering. More specifically, the control is achieved by exploiting the interfacial valence mismatch to influence the electrostatic potential step across the interface, which manifests itself as the biased-voltage in ferroelectric hysteresis loops and determines the ferroelectric state. A broad study of diverse systems comprising different ferroelectrics and conducting perovskite underlayers extends the generality of this phenomenon.
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Yang KL, Lee SK, Yang SY, Kao RH, Lin CL, Lin PY. Identification of two novel HLA-A*02 variants, A*02:319 and A*02:01:64, in two Taiwanese marrow stem cell donors by sequence-based typing. Int J Immunogenet 2012; 39:261-3. [PMID: 22221707 DOI: 10.1111/j.1744-313x.2011.01080.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report here two novel variants of HLA-A*02 allele, A*02:319 and A*02:01:64, discovered in two Taiwanese unrelated volunteer bone marrow donors by sequence-based typing (SBT) method. The DNA sequence of A*02:319 is identical to A*02:07 in exons 2 and 3 but varies with one nucleotide at codon 9 (TTC->TCC). The variation caused one amino acid substitution at residue 9 (F->S). On the other hand, the DNA sequence of A*02:01:64 is identical to the sequence of A*02:01:01:01 in exons 2 and 3 except a silent mutation at codon 114 (CAC->CAT). The probable HLA-A, HLA-B and HLA-DRB1 haplotypes in association with A*02:319 and A*02:01:64 were deduced as A*02:319-B*46:01-DRB1*04 and A*02:01:64-B*38:02-DRB1*16:02, respectively.
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Yang SY, Winslet M. The igf system in carcinogenesis and its implication for cancer therapy. Curr Oncol 2011; 18:301-2. [PMID: 22184491 DOI: 10.3747/co.v18i6.885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The discovery of the insulin-like growth factor (igf) system occurred half a century ago, in a series of experiments showing that the growth hormone itself exercises no direct metabolic action on skeletal tissues, but rather acts through secondary substances[...].
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Rizvi SB, Yang SY, Bala R, Shirin G, Seifalian AM, Keshtgar M. P2-09-04: Near Infra Red Quantum Dots as Novel Probes for Sentinel Lymph Node Biopsy. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-p2-09-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Sentinel Lymph Node Biopsy (SLNB) is a standard procedure in breast cancer surgery. The current tracers for SLNB including the blue dye and radiocolloid, have various limitations like anaphylactic reaction to the dye and exposure of radioactivity to both patients and staff. Quantum dots (QDs) are fluorescent nanoparticles (2-10nm in diameter), with unique photophysical properties like enhanced photostability and size tunable emission wavelengths, that can potentially replace the current tracers for SLNB. QDs emitting in the Near Infra Red (NIR) range of the electromagnetic spectrum can be tracked in deep tissues as biological tissues are transparent to NIR wavelengths (700-2000nm). We have developed Near Infra Red emitting Quantum Dots (NIR QDs) as alternative probes for SLNB and set up a live NIR imaging system to track them in deep tissues.
Materials and Methods: NIR emitting QDs based on CdTeHg were synthesized by a one pot aqueous method and characterized using Transmission Electron Microscopy (TEM), UV-V is*** spectrometry and photoluminescence studies. 100μl of QDs (1mg/ml) were co-injected intradermally with blue dye into the hind legs of rat models (n=4) and compared to controls (n=4) which were injected with blue dye only. The procedure was conducted under inhalational anaesthesia using isofluorane and rats were monitored for hemodynamic instability for a period of 2 hrs after injection. QDs were tracked using a live NIR imaging system including an excitation light of 630nm, emission filter of 850nm and a Hamamatsu Orca 2 UV-Vis-NIR thermoelectrically cooled CCD camera.
Results: NIR QDs had a core diameter of 7nm on TEM and emitted at 860nm upon excitation with a 630nm light source. Within 3 minutes of an intradermal injection QDs entered the lymphatic tracts. The lymphatics converged to the groin and a small surgical incision at this site revealed the underlying sentinel lymph node with minimal dissection. The rats remained hemodynamically stable throughout the duration of the procedure with no significant difference in comparison with the controls.
Conclusion: NIR emitting QDs can be used for accurate localisation of the SLN prior to surgical incision, making this an even more minimally invasive procedure and possibly an office based procedure in the future. The nanosize, surface chemistry and deep tissue visibility of these novel nanoprobes allow relentless possibilities for in vitro and in vivo molecular and cellular imaging. NIR QDs can be conjugated to biomolecules for cancer localisation, detection of micrometastasis and image guided targeted drug delivery of chemotherapeutic agents. Further studies to investigate their in vivo biodistribution are in progress to take this technology one step closer to clinical application.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P2-09-04.
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Shi K, Li DB, Song HP, Guo Y, Wang J, Xu XQ, Liu JM, Yang AL, Wei HY, Zhang B, Yang SY, Liu XL, Zhu QS, Wang ZG. Determination of InN/Diamond Heterojunction Band Offset by X-ray Photoelectron Spectroscopy. NANOSCALE RESEARCH LETTERS 2011; 6:50. [PMID: 27502672 PMCID: PMC3212014 DOI: 10.1007/s11671-010-9796-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 09/10/2010] [Indexed: 05/30/2023]
Abstract
Diamond is not only a free standing highly transparent window but also a promising carrier confinement layer for InN based devices, yet little is known of the band offsets in InN/diamond system. X-ray photoelectron spectroscopy was used to measure the energy discontinuity in the valence band offset (VBO) of InN/diamond heterostructure. The value of VBO was determined to be 0.39 ± 0.08 eV and a type-I heterojunction with a conduction band offset (CBO) of 4.42 ± 0.08 eV was obtained. The accurate determination of VBO and CBO is important for the application of III-N alloys based electronic devices.
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Heron JT, Trassin M, Ashraf K, Gajek M, He Q, Yang SY, Nikonov DE, Chu YH, Salahuddin S, Ramesh R. Electric-field-induced magnetization reversal in a ferromagnet-multiferroic heterostructure. PHYSICAL REVIEW LETTERS 2011; 107:217202. [PMID: 22181917 DOI: 10.1103/physrevlett.107.217202] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Indexed: 05/12/2023]
Abstract
A reversal of magnetization requiring only the application of an electric field can lead to low-power spintronic devices by eliminating conventional magnetic switching methods. Here we show a nonvolatile, room temperature magnetization reversal determined by an electric field in a ferromagnet-multiferroic system. The effect is reversible and mediated by an interfacial magnetic coupling dictated by the multiferroic. Such electric-field control of a magnetoelectric device demonstrates an avenue for next-generation, low-energy consumption spintronics.
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Yang SY, Su SC, Liu T, Fan G, Wang J, Leng PS. First Report of Anthracnose Caused by Colletotrichum gloeosporioides on Pistachio (Pistacia vera) in China. PLANT DISEASE 2011; 95:1314. [PMID: 30731667 DOI: 10.1094/pdis-04-11-0269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the 1990s, pistachio (Pistacia vera L. 'Kerman' and 'Peters') was introduced in China. They are found in many orchards in Beijing and Gansu and Hebei provinces, northern China. In 2009, a new disease was observed on leaves, stems, and fruits in pistachio orchards in Gansu Province. Disease incidence in 8- to 12-year-old orchards was 30%. Yield losses reached 25%. Symptoms began as discrete, sunken, black spots, approximately 10 mm in diameter, followed by circular lesions that eventually coalesced with tissue death recorded and orange fructifications developed on lesions. Pieces of diseased leaves, stems, and fruits were surfaced sterilized and placed on 2% potato dextrose agar (PDA) at 25°C. A fungus was consistently isolated. After 10 days, cultures on PDA showed aerial, white mycelium that turned gray to grayish black with a salmon-to-orange conidial mass at 25°C and a 12-h photoperiod. Brown, 80 to 120 μm long setae were observed in the acervulus. Conidia were hyaline, fusiform to nearly straight, and averaged 12 to 18 × 3 to 5 μm. On the basis of morphological characteristics, the fungus was identified as Colletotrichum gloeosporioides (Penz.) Sacc. (2). On PDA, 0.5 μg/ml of benomyl was applied for the sensitivity test (3). Benomyl completely inhibited the growth of the fungus. Mycelial DNA was extracted, PCR amplified using ITS1 and ITS4 primers for the ribosomal DNA internal transcribed spacers 1 and 2, and sequenced. The DNA sequence was recorded in GenBank as No. HQ631378. The DNA sequence was blasted showing 99% identity with Accession Nos. GQ144454 and GU004376, for C. gloeosporioides. Pathogenicity tests were conducted under greenhouse conditions at 25°C. Three replicates of 2-year-old 'Kerman' plants were inoculated with mycelial PDA plugs placed on 0.5-cm2 stem wounds and then wrapped with Parafilm. Controls were inoculated with PDA plugs without the fungus. After 3 weeks, stem cankers were observed on inoculated plants. Control plants remained healthy. Pathogenicity was also tested on injured leaves and fruits. A 10-μl drop of a spore suspension of 104 conidia/ml was applied on 'Kerman' and 'Peters' leaves and 'Kerman' fruits and placed on plates with a wet filter paper at 25°C. Small, black lesions were observed at 2 days after inoculation. At 7 days, necrotic lesions covered the entire surface. C. gloeosporioides was reisolated from necrotic lesions. Controls did not develop symptoms. C. acutatum has been reported on pistachio in Australia (1), but to our knowledge, this is the first report of anthracnose caused by C. gloeosporioides on pistachio. References: (1) G. J. Ash and V. M. Lanoiselet. Australas. Plant Pathol. 30:365, 2001. (2) J. Y. Lu. Plant Pathogenic Mycology. China Agricultural Press, Beijing, 2001. (3) N. A. R. Peres et al. Plant Dis. 86:620, 2002.
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Yang KL, Lee SK, Lin CC, Jiang S, Chiu HM, Lin S, Chen YC, Yang SY, Jian YF, Shyr MH, Lin CL, Lin PY. Discovery of two novel HLA-B alleles, B*46:13:03 and B*15:189, in two Taiwanese volunteer bone marrow donors by sequence-based typing. Int J Immunogenet 2011; 38:539-42. [PMID: 21819546 DOI: 10.1111/j.1744-313x.2011.01030.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here two novel HLA-B alleles, B*46:13:03 and B*15:189, discovered in two Taiwanese volunteer bone marrow donors. The sequence of B*15:189 has a nucleotide sequence possibly derived from a recombination event between HLA-B*39:01:01 and B*15:01:01:01, while the origin of the sequence B*46:13:03 was less obvious to postulate, considering the low frequency of B*46:13 in the general population and the silent mutations involved. Our report here adds further HLA polymorphism to the growing lists of HLA-B*46 and HLA-B*15 and provides an additional HLA information for donor search programme for patients undergoing transplant.
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Yang KL, Lee SK, Lin CC, Jiang S, Chiu HM, Lin S, Chen YC, Jian YF, Yang SY, Yang YB, Chen SB, Shyr MH, Lin CL, Lin PY. Oriental HLA-A*11:90 detected in a Taiwanese cord blood sample and the haplotype in association with A*11:90 allele. Int J Immunogenet 2011; 38:543-6. [PMID: 21806781 DOI: 10.1111/j.1744-313x.2011.01031.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here an HLA-A allele, A*11:90, found in a Taiwanese cord blood sample using DNA sequence-based typing (SBT) protocol after observing an anomalous reaction pattern in a sequence-specific oligonucleotide (SSO) typing exercise. The sequence of A*11:90 is identical to A*11:01:01, the most predominant A*11 variant in Taiwanese, in exon 2 but differs from A*11:01:01 in exon 3 by two nucleotide substitutions at codon 163 (c.487C>G and c.488G>A), resulting R163E. In comparison with the sequence of A*11:02:01, the second most predominant subtype of A*11 in Taiwanese A*11:90 has one nucleotide difference at codon 19 (c.55A>G) in exon 2 resulting K19E and two nucleotides variations at codon 163 (c.487C>G and c.488G>A) in exon 3 resulting R163E. HLA-A*11:90-B*40:02-DRB1*11:01 is the deduced probable HLA haplotype in association with A*11:90. The generation of A*11:90 is thought to involve a DNA recombination event between alleles A*11:01:01 and A*80:01 where A*80:01 donated a fragment of the DNA sequence (from n.t. 487 to n.t. 497) to the recipient sequence of A*11:01:01.
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Yang KL, Lee SK, Lin CC, Jiang S, Chiu HM, Lin S, Chen YC, Chen SP, Yang SY, Jian YF, Shyr MH, Lin CL, Lin PY. Detection of two HLA-A alleles, A*31:30 and A*26:20, in two Taiwanese volunteer bone marrow donors by sequence-based typing. Int J Immunogenet 2011; 38:437-40. [PMID: 21692992 DOI: 10.1111/j.1744-313x.2011.01023.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We here report detection of a novel sequence of HLA-A*31:30 and a confirmatory sequence of HLA*26:20 from two Taiwanese individuals. The sequence of A*31:30 is identical to that of A*31:01:02 in exons 2 and 3, except one nucleotide (n.t.) substitution c.539T > G resulting in p.Leu180Trp. The sequence of A*26:20 is identical to A*26:01:01 in exons 2 and 3, except a segment of the sequence from n.t. 78 to n.t.102. The mismatched sequence segment is identical to a sequence segment of A*02:03:01, suggesting that the formation of A*26:20 was resulted from a DNA recombination event between A*26:01:01 and A*02:03:01 sequences. A*26:20 differs from A*26:01:01 with c.98A > T resulting in p.Tyr33Phe.
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