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Zhang CQ, Gao LL, Dong LM, Liu HY. Depth-dependent normal strain of articular cartilage under sliding load by the optimized digital image correlation technique. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Liu HY, Lundh T, Dicksved J, Lindberg JE. Expression of heat shock protein 27 in gut tissue of growing pigs fed diets without and with inclusion of chicory fiber. J Anim Sci 2012; 90 Suppl 4:25-7. [PMID: 23365273 DOI: 10.2527/jas.53724] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The physiological expression of cytoprotective heat shock protein 27 (Hsp27) in the gut was investigated in eighteen 7-wk-old pigs fed one of 3 fiber-rich diets for 18 d. The diets were a cereal-based control diet and a cereal-based diet with inclusion of either 80 g/kg chicory forage (CF80) or chicory root (CR80). Immunohistochemical staining showed that Hsp27 was expressed in all the samples from ileum and colon. The expression was most intensive in the apical intestinal epitheliums in close contact with luminal contents and lighter in crypt cells. The ileal Peyer's patches showed a strong expression of Hsp27, which was highly correlated with Hsp27 expression in the ileal epithelial cells (P = 0.003). The frequency of ileal Hsp27 expression with the most intensive staining was distributed higher in pigs fed chicory forage diet (CF80, 25%) followed by chicory root diet (CR80, 16.7%) and the control (11.1%). In proximal colon, the frequency of expression showed a similar pattern for the different diets. The intestinal microbiota profile was characterized with the intention to find correlations to heat shock protein (Hsp) expression in pig gastrointestinal (GI) tract and showed that the distal ileum and proximal colon encompass its own unique microbial profile. However, no significant relationship was found between gut microbiota diversity and Hsp27 expression. These indicate that Hsp27 expression in the porcine gut could be associated with specific dietary fiber components but not the overall microbiota diversity.
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Liu HY, Bartonova A, Pascal M, Smolders R, Skjetne E, Dusinska M. Approaches to integrated monitoring for environmental health impact assessment. Environ Health 2012; 11:88. [PMID: 23171406 PMCID: PMC3526392 DOI: 10.1186/1476-069x-11-88] [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: 01/09/2012] [Accepted: 11/13/2012] [Indexed: 05/04/2023]
Abstract
Although Integrated Environmental Health Monitoring (IEHM) is considered an essential tool to better understand complex environmental health issues, there is no consensus on how to develop such a programme. We reviewed four existing frameworks and eight monitoring programmes in the area of environmental health. We identified the DPSEEA (Driving Force-Pressure-State-Exposure-Effect-Action) framework as most suitable for developing an IEHM programme for environmental health impact assessment. Our review showed that most of the existing monitoring programmes have been designed for specific purposes, resulting in narrow scope and limited number of parameters. This therefore limits their relevance for studying complex environmental health topics. Other challenges include limited spatial and temporal data availability, limited development of data sharing mechanisms, heterogeneous data quality, a lack of adequate methodologies to link disparate data sources, and low level of interdisciplinary cooperation. To overcome some of these challenges, we propose a DPSEEA-based conceptual framework for an IEHM programme that would enable monitoring and measuring the impact of environmental changes on human health. We define IEHM as 'a systemic process to measure, analyse and interpret the state and changes of natural-eco-anthropogenic systems and its related health impact over time at the same location with causative explanations across the various compartments of the cause-effect chain'. We develop a structural work process to integrate information that is based on existing environmental health monitoring programmes. Such a framework allows the development of combined monitoring systems that exhibit a large degree of compatibility between countries and regions.
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Couto ODD, Sercombe D, Puebla J, Otubo L, Luxmoore IJ, Sich M, Elliott TJ, Chekhovich EA, Wilson LR, Skolnick MS, Liu HY, Tartakovskii AI. Effect of a GaAsP shell on the optical properties of self-catalyzed GaAs nanowires grown on silicon. NANO LETTERS 2012; 12:5269-5274. [PMID: 22989367 DOI: 10.1021/nl302490y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We realize the growth of self-catalyzed core-shell GaAs/GaAsP nanowires (NWs) on Si substrates using molecular-beam epitaxy. Transmission electron microscopy of single GaAs/GaAsP NWs demonstrates their high crystal quality and shows domination of the GaAs zinc-blende phase. Using continuous-wave and time-resolved photoluminescence (PL), we make a detailed comparison with uncapped GaAs NWs to emphasize the effect of the GaAsP capping in suppressing the nonradiative surface states. Significant PL enhancement in the core-shell structures exceeding 3 orders of magnitude at 10 K is observed; in uncapped NWs PL is quenched at 60 K, whereas single core-shell GaAs/GaAsP structures exhibit bright emission even at room temperature. From analysis of the PL temperature dependence in both types of NW we are able to determine the main carrier escape mechanisms leading to the PL quench.
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Liu HY, Jia XQ, Gao LX, Ma YY. Hepatocyte growth factor regulates HLX1 gene expression to modulate HTR-8/SVneo trophoblast cells. Reprod Biol Endocrinol 2012; 10:83. [PMID: 22989111 PMCID: PMC3508862 DOI: 10.1186/1477-7827-10-83] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Accepted: 09/14/2012] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Paracrine signaling of the hepatocyte growth factor (HGF) cytokine plays an important role in survival and invasion ability of placental trophoblasts. However, the intracellular factors and biological pathways underlying these responses remain unclear. METHODS This study investigated whether HGF affected the expression of homeobox gene HLX1, which is principally expressed in reproductive tissues and in some immune cells, and evaluated the implications of such in the HGF-induced human trophoblast cell line HTR-8/SVneo. RESULTS HGF was found to up-regulate both HLX1 mRNA and protein levels. Transient transfection of small interfering RNA (siRNA) targeting HLX1 abrogated its induction by HGF. Functionally, HLX1 siRNA not only reduced the growth and invasion capacities of HTR-8/SVneo cells at the basal level, but also inhibited these responses induced by HGF treatment. CONCLUSIONS HLX1 is an essential downstream signaling component of HGF that leads to growth and invasiveness of trophoblast cells.
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Liu HY, Peng H, Tang LY, Zhang SH, Gao X, Chao XQ, Zhang YH. [Association between serum nitric oxide level and microalbuminuria: a 1:2 matched case-control study]. ZHONGHUA LIU XING BING XUE ZA ZHI = ZHONGHUA LIUXINGBINGXUE ZAZHI 2012; 33:746-749. [PMID: 22968029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To investigate the association between serum nitric oxide and microalbuminuria. METHODS Based on a community survey in Jinchang district Suzhou city, a 1:2 matched case-control study was performed. A total of 208 cases with microalbuminuria were recruited. The controls were selected from the same community, with the same level of income. After matched with age, gender, waist circumference and fast plasma glucose, a total of 416 controls were selected. Values of serum nitric oxide were tested for all eligible participants. The association between serum nitric oxide level and microalbuminuria were analyzed by using the multivariate conditional logistic regression models. RESULTS The mean level of serum nitric oxide was slightly lower for individuals with microalbuminuria (median, interquartile range: 27.75, 14.48 - 42.15 µmol/L) than those without (28.25, 17.40 - 43.45 µmol/L). However, the difference was not statistically significant (P = 0.316). RESULTS from the multivariable conditional logistic regression model showed that serum nitric oxide level was not associated with microalbuminuria, after adjustment for all the confounders. Compared with the highest level of serum nitric oxide, the odds ratios of microalbuminuria for individuals in the 1(st), 2(nd)and 3(rd) quartiles were not significantly different, after adjustment for confounders. In pairs with hypertension, the odds of microalbuminuria were 85% higher for individuals with the lowest level of serum nitric oxide than those with the highest level (OR = 1.85, 95%CI: 0.96 - 3.57). Additionally, in pairs without hypertension, the odds of microalbuminuria was just 40% higher for individuals with the lowest level of serum nitric oxide than those with the highest level (OR = 1.40, 95%CI: 0.58 - 3.40). CONCLUSION There was no significant correlation between serum nitric oxide and microalbuminuria in the general population in our study.
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Ivarsson E, Liu HY, Dicksved J, Roos S, Lindberg JE. Impact of chicory inclusion in a cereal-based diet on digestibility, organ size and faecal microbiota in growing pigs. Animal 2012; 6:1077-85. [PMID: 23031467 DOI: 10.1017/s1751731111002709] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
A total of 30 7-week-old pigs were used to evaluate the effects of chicory inclusion on digestibility, digestive organ size and faecal microbiota. Five diets were formulated: a cereal-based control diet and four diets with inclusion of 80 and 160 g/kg chicory forage (CF80 and CF160), 80 g/kg chicory root (CR80) and a mix of 80 g/kg forage and 80 g/kg chicory root (CFR). Generally, the pigs showed a high growth rate and feed intake, and no differences between the different diets were observed. The coefficients of total tract apparent digestibility (CTTAD) of energy, organic matter and CP did not differ between the control and CF80, whereas they were impaired in diet CF160. The CTTAD of non-starch polysaccharides and especially the uronic acids were higher (P < 0.05) with chicory inclusion, with highest (P < 0.05) values for diet CF160. Coliform counts were lower and lactobacilli : coliform ratio was higher (P < 0.05) in diet CFR than in the control. Global microbial composition was investigated by terminal restriction fragment length polymorphism combined with cloning and sequencing. Analysis of gut microbiota pattern revealed two major clusters where diet CF160 differed from the control and CR80 diet. Chicory forage diets were correlated with an increased relative abundance of one species related to Prevotella and decreased abundance of two other species related to Prevotella. For diet CFR, the relative abundance of Lactobacillus johnsonii was higher than in the other diets. This study shows that both chicory forage and root can be used as fibre sources in pig nutrition and that they modulate the composition of the gut microbiota differently.
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Liu HY, Bartonova A, Neofytou P, Yang A, Kobernus MJ, Negrenti E, Housiadas C. Facilitating knowledge transfer: decision support tools in environment and health. Environ Health 2012; 11 Suppl 1:S17. [PMID: 22759499 PMCID: PMC3388451 DOI: 10.1186/1476-069x-11-s1-s17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The HENVINET Health and Environment Network aimed to enhance the use of scientific knowledge in environmental health for policy making. One of the goals was to identify and evaluate Decision Support Tools (DST) in current use. Special attention was paid to four "priority" health issues: asthma and allergies, cancer, neurodevelopment disorders, and endocrine disruptors.We identified a variety of tools that are used for decision making at various levels and by various stakeholders. We developed a common framework for information acquisition about DSTs, translated this to a database structure and collected the information in an online Metadata Base (MDB).The primary product is an open access web-based MDB currently filled with 67 DSTs, accessible through the HENVINET networking portal http://www.henvinet.eu and http://henvinet.nilu.no. Quality assurance and control of the entries and evaluation of requirements to use the DSTs were also a focus of the work. The HENVINET DST MDB is an open product that enables the public to get basic information about the DSTs, and to search the DSTs using pre-designed attributes or free text. Registered users are able to 1) review and comment on existing DSTs; 2) evaluate each DST's functionalities, and 3) add new DSTs, or change the entry for their own DSTs. Assessment of the available 67 DSTs showed: 1) more than 25% of the DSTs address only one pollution source; 2) 25% of the DSTs address only one environmental stressor; 3) almost 50% of the DSTs are only applied to one disease; 4) 41% of the DSTs can only be applied to one decision making area; 5) 60% of the DSTs' results are used only by national authority and/or municipality/urban level administration; 6) almost half of the DSTs are used only by environmental professionals and researchers. This indicates that there is a need to develop DSTs covering an increasing number of pollution sources, environmental stressors and health end points, and considering links to other 'Driving forces-Pressures-State-Exposure-Effects-Actions' (DPSEEA) elements. Of interest to both researchers and decision makers should be the standardization of the way DSTs are described for easier access to the knowledge, and the identification of coverage gaps.
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Deng HD, Li GC, Liu HY, Dai QF, Wu LJ, Lan S, Gopal AV, Trofimov VA, Lysak TM. Assembling of three-dimensional crystals by optical depletion force induced by a single focused laser beam. OPTICS EXPRESS 2012; 20:9616-9623. [PMID: 22535053 DOI: 10.1364/oe.20.009616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We proposed a method to assemble microspheres into a three-dimensional crystal by utilizing the giant nonequilibrium depletion force produced by nanoparticles. Such assembling was demonstrated in a colloid formed by suitably mixing silica microspheres and magnetic nanoparticles. The giant nonequilibrium depletion force was generated by quickly driving magnetic nanoparticles out of the focusing region of a laser light through both optical force and thermophoresis. The thermophoretic binding of silica beads is so tight that a colloidal photonic crystal can be achieved after complete evaporation of solvent. This technique could be employed for fabrication of colloidal photonic crystals and molecular sieves.
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Zhang CY, Yao JW, Liu HY, Dai QF, Wu LJ, Lan S, Trofimov VA, Lysak TM. Colorizing silicon surface with regular nanohole arrays induced by femtosecond laser pulses. OPTICS LETTERS 2012; 37:1106-1108. [PMID: 22446240 DOI: 10.1364/ol.37.001106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report on the formation of one- and two-dimensional (1D and 2D) nanohole arrays on the surface of a silicon wafer by scanning with a femtosecond laser with appropriate power and speed. The underlying physical mechanism is revealed by numerical simulation based on the finite-difference time-domain technique. It is found that the length and depth of the initially formed gratings (or ripples) plays a crucial role in the generation of 1D or 2D nanohole arrays. The silicon surface decorated with such nanohole arrays can exhibit vivid structural colors through efficiently diffracting white light.
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161
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Yao JW, Zhang CY, Liu HY, Dai QF, Wu LJ, Lan S, Gopal AV, Trofimov VA, Lysak TM. High spatial frequency periodic structures induced on metal surface by femtosecond laser pulses. OPTICS EXPRESS 2012; 20:905-911. [PMID: 22274437 DOI: 10.1364/oe.20.000905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The high spatial frequency periodic structures induced on metal surface by femtosecond laser pulses was investigated experimentally and numerically. It is suggested that the redistribution of the electric field on metal surface caused by the initially formed low spatial frequency periodic structures plays a crucial role in the creation of high spatial frequency periodic structures. The field intensity which is initially localized in the grooves becomes concentrated on the ridges in between the grooves when the depth of the grooves exceeds a critical value, leading to the ablation of the ridges in between the grooves and the formation of high spatial frequency periodic structures. The proposed formation process is supported by both the numerical simulations based on the finite-difference time-domain technique and the experimental results obtained on some metals such as stainless steel and nickel.
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Zhang PJ, Run WW, P L, Wang CB, Deng XX, Wang BB, Chen BB, J J, Liu HY, Dong ZN, Zhang XJ, Tian YP. Peripheral blood mRNA expression patterns to differentiate hepatocellular carcinoma from other hepatic diseases. Front Biosci (Elite Ed) 2012; 4:620-30. [PMID: 22201899 DOI: 10.2741/e404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Peripheral blood genes expressions profiling (GeXP) have been convinced to be more specific for the diagnosis of cancer and other diseases, and the GeXP system provides an ideal method to analyze multiple genes expression in one normalized and equable system. We aim to differentiate hepatocellular carcinoma from other hepatic diseases based on peripheral blood and the GeXP system. Fifteen selected hepatic diseases related genes with two house-keeping genes for normalization were detected by the GeXP system. The diagnosis model was based on K nearest neighbor classifier and cross validation, and software based on MATLAB software was built for differential diagnosis of hepatic diseases. Eight hepatic related genes were demonstrated to show an obvious statistic difference in expressions while the K nearest neighbors classifier showed that the accuracy for normal controls, hepatitis B, liver cirrhosis, hepatocellular carcinoma and the Other group was separately 80.57 %, 78.17 %, 84.48 %, 73.24 % and 85.85 %. The set of validation has been carried out to assess the accuracy of Model Two and the accuracy was even higher than the set of building for the model, except for the hepatitis B (HBV) group. A sensitive and specific GeXP system of eight genes has been developed for the accurate differential diagnosis of hepatic disease.
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163
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Ku LX, Zhang J, Guo SL, Liu HY, Zhao RF, Chen YH. Integrated multiple population analysis of leaf architecture traits in maize (Zea mays L.). JOURNAL OF EXPERIMENTAL BOTANY 2012; 63:261-74. [PMID: 21984652 DOI: 10.1093/jxb/err277] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Leaf morphology in maize is regulated by developmental patterning along three axes: proximodistal, mediolateral, and adaxial-abaxial. Maize contains homologues of many genes identified as regulators of leaf development in other species, but their relationship to the natural variation of leaf shape remains unknown. In this study, quantitative trait loci (QTLs) for leaf angle, leaf orientation value, leaf length, and leaf width were mapped by a total of 256 F(2:3) families evaluated in three environments. Meta-analysis was used to integrate genetic maps and detect QTLs across several independent QTL studies, on the basis of the previously reported experimental results for leaf architecture traits. Candidate gene sequences for leaf architecture were mapped in the integrated consensus genetic map. In total, 21 QTLs and 17 meta-QTLs (mQTLs) were detected. Among these QTLs, qLA1-1 and qLA2 were consistently detected in five and three populations respectively, and six of seven QTLs with contributions (R(2)) >10% were integrated in mQTLs. Six key mQTLs (mQTL1-1, mQTL2-1, mQTL3-3, mQTL5-1, mQTL7-2, and mQTL8-1) with R(2) of some initial QTLs >10% included 4-6 initial QTLs associated with 2-4 traits. Therefore, the chromosome regions for six mQTLs with high QTL co-localization might be hot spots of the important QTLs for the associated traits. Fifteen key candidate genes controlling leaf architecture traits coincided with 11 corresponding mQTLs, namely DWARF4, KAN3, liguleless1, TAC1, ROT3, AS2/liguleless2, PFL2, yabby9/SE/LIC/yabby15, mwp1, CYCD3;2, and CYCB1. In particular, DWARF4, liguleless1, AS2/liguleless2, yabby9/SE/LIC/yabby15, and CYCD3;2 were mapped within the important mQTL1-1, mQTL2-1, mQTL3-3, mQTL5-1, and mQTL7-2 intervals, respectively. Fine mapping or construction of single chromosome segment lines for genetic regions of these five mQTLs is worth further study and could be put to use in marker-assisted breeding. In conclusion, the results provide useful information for further research and help to reveal the molecular mechanisms with regard to leaf architecture traits.
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Zhang PJ, Run WW, P L, Wang CB, Deng XX, Wang BB, Chen BB, J J, Liu HY, Dong ZN, Zhang XJ, Tian YP. Peripheral blood mRNA expression patterns to differentiate hepatocellular carcinoma from other hepatic diseases. Front Biosci (Elite Ed) 2012. [PMID: 22201899 DOI: 10.2741/404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Peripheral blood genes expressions profiling (GeXP) have been convinced to be more specific for the diagnosis of cancer and other diseases, and the GeXP system provides an ideal method to analyze multiple genes expression in one normalized and equable system. We aim to differentiate hepatocellular carcinoma from other hepatic diseases based on peripheral blood and the GeXP system. Fifteen selected hepatic diseases related genes with two house-keeping genes for normalization were detected by the GeXP system. The diagnosis model was based on K nearest neighbor classifier and cross validation, and software based on MATLAB software was built for differential diagnosis of hepatic diseases. Eight hepatic related genes were demonstrated to show an obvious statistic difference in expressions while the K nearest neighbors classifier showed that the accuracy for normal controls, hepatitis B, liver cirrhosis, hepatocellular carcinoma and the Other group was separately 80.57 %, 78.17 %, 84.48 %, 73.24 % and 85.85 %. The set of validation has been carried out to assess the accuracy of Model Two and the accuracy was even higher than the set of building for the model, except for the hepatitis B (HBV) group. A sensitive and specific GeXP system of eight genes has been developed for the accurate differential diagnosis of hepatic disease.
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165
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Petersen JC, Kaiser S, Dean N, Simoncig A, Liu HY, Cavalieri AL, Cacho C, Turcu ICE, Springate E, Frassetto F, Poletto L, Dhesi SS, Berger H, Cavalleri A. Clocking the melting transition of charge and lattice order in 1T-TaS2 with ultrafast extreme-ultraviolet angle-resolved photoemission spectroscopy. PHYSICAL REVIEW LETTERS 2011; 107:177402. [PMID: 22107580 DOI: 10.1103/physrevlett.107.177402] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Indexed: 05/13/2023]
Abstract
We use time- and angle-resolved photoemission spectroscopy with sub-30-fs extreme-ultraviolet pulses to map the time- and momentum-dependent electronic structure of photoexcited 1T-TaS(2). This compound is a two-dimensional Mott insulator with charge-density wave ordering. Charge order, evidenced by splitting between occupied subbands at the Brillouin zone boundary, melts well before the lattice responds. This challenges the view of a charge-density wave caused by electron-phonon coupling and Fermi-surface nesting alone, and suggests that electronic correlations play a key role in driving charge order.
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Huang ZR, Chen JH, Liu HY, Zhu SJ. [Determination of amino acid contents in cottonseeds using near infrared reflectance spectroscopy]. GUANG PU XUE YU GUANG PU FEN XI = GUANG PU 2011; 31:2692-2696. [PMID: 22250537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A total of 445 samples with great variability in amino acid contents were harvested for different seasons in different regions for developing calibration equations of amino acid content in cottonseeds. The spectral data of cotton kernel powder was processed using the first derivative mathematical treatment combined with SNV and de-trend, as well as modified partial least squares (MPLS) regression method. The chemometric models for 17 amino acids present in cottonseed were developed, and 12 of them were excellent for the determination of related amino acids, namely asparagic acid, threonine, glutamic acid, glycine, alanine, valine, isoleucine, leucine, phenylalanine, lysine, histidine, and arginine, with RPDc of 3.735-7.132 and determination coefficient (r2) of 0.910-0.979 in external validation. For those 12 amino acids, their values predicted by NIRS are comparable to those obtained by the chemical method with good accuracy. The RPDc of serine, methionine, tyrosine and proline were 2.205 -2.814, and their determination coefficient (r2) were 0.800-0.830 in external validation. For those 4 amino acids, the values from NIRS are not so accurate as chemical analysis, but could be used in sample screening in cotton breeding program. While the equation for cystine was useless as its RPDc was only 1.358, which was not suitable for estimating its content in cottonseeds.
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An XP, Hou JX, Li G, Peng JY, Liu XQ, Liu HY, Xiao WP, Wang JG, Song YX, Cao BY. Analysis of Differentially Expressed Genes in Ovaries of Polytocous versus Monotocous Dairy Goats Using Suppressive Subtractive Hybridization. Reprod Domest Anim 2011; 47:498-503. [DOI: 10.1111/j.1439-0531.2011.01910.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Dong SW, Ma L, Xu N, Yan HQ, Liu HY, Li YW, Zhang P. Research on the reactivation of Syk expression caused by the inhibition of DNA promoter methylation in the lung cancer. Neoplasma 2011; 58:89-95. [PMID: 21067271 DOI: 10.4149/neo_2011_01_89] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The aim of this study was to study the expression of Syk gene and methylation in its promoter region in the lung cancer and to investigate the relationship between silencing of the Syk gene and DNA methylation of the Syk promoter region in lung cancer cell lines. Real-time PCR and immunohistochemistry were used to examine the Syk expression in specimens from 3 lung cancer cell lines and 16 lung cancer patients (tumor tissues and adjacent normal tissues). MSP was used to analyze the methylation status of the Syk promoter region. We also investigated the role of restoring Syk expression by using a DNA methyltransferase inhibitor, 5-aza-CdR, in suppressing invasion of lung cancer cell lines. No expression of the Syk gene was detected in the 3 lung cancer cell lines. In the 16 lung cancer patient samples, Syk expression was significantly lower in the tumor tissues than that in their adjacent normal tissues (P<0.05). Consistently, immunohistochemistry analysis of Syk protein expression showed that in the lung cancer tissues Syk protein expression was also significantly lower than that in their adjacent normal tissues. In the two lung cancer cell lines (NL9980, YTMLC-9) that lack the endogenous Syk expression, 4uM demethylation agent 5-aza-CdR treatment was able to reactivate the Syk gene expression, but not NCI-H446. In conclusion, hypermethylation leads to silencing of the Syk gene in human lung carcinoma cell lines. Methylation of the Syk promoter and loss of Syk expression in lung cancer cell lines are independent biomarkers. Syk may be a potential tumor suppressor in human lung cancer.
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Cui LL, Liang YY, Dong FJ, Ma L, Tu Y, Liu HY, Jiang J. Structure of rat skin after application of electret characterized by DSC. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/301/1/012027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zhang CP, He P, Du DD, Wei PX, Yu ZL, Xie YZ, Liu HY. [Effect of exogenous nitric oxide donor SNP on seed germination and antioxidase activities of Perilla frutescens seedlings under NaCl stress]. ZHONG YAO CAI = ZHONGYAOCAI = JOURNAL OF CHINESE MEDICINAL MATERIALS 2011; 34:665-669. [PMID: 21954550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To explore the method of improving the salt resistance ability of seeds and seedlings of Perilla frutescens under NaCl stress. METHODS Physiological indexes of Perilla frutescens seeds treated by sodium nitroprusside (SNP) under NaCl stress like the germination vigor, germination rate, germination index and vigor index were measured. And other indexes like the activities of nitrate reductase (NR), malondialdehyde (MDA), superoxide (SOD), peroxidase (POD) and catalase (CAT) were also measured. RESULTS The germination indexes of Perilla frutescens seeds under NaCl stress had obvious inhibition. But after the treatment with different concentrations of SNP, every germination indexes were all increased. And the seeds that treated with SNP with the concentration of 0.1 mmol/L has the most significantly increase in every index. The germination vigor was 60.4%, the germination rate was 78.3%, the germination index and vigor index were 13.7 and 0.1093 respectively. The content of MDA was decreased after the treatment of SNP. The activities of four enzymes included NR, SOD, POD and CAT were increased with the treatment of SNP, and get the maximin (1.52 microg/g x h, 0.32 U/mg, 5.9 U/mg and 4.8 U/mg respectively) with the concentration of 0.1 mmol/L SNP. CONCLUSION SNP with concentration of 0.1 mmol/L could significantly alleviate the damages to the seeds and seedlings of Perilla frutescens under NaCl stress, and promote the salt resistance of the seeds and seedlings.
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Liu HY, Ivarsson E, Jönsson L, Holm L, Lundh T, Lindberg JE. Growth performance, digestibility, and gut development of broiler chickens on diets with inclusion of chicory (Cichorium intybus L.). Poult Sci 2011; 90:815-23. [PMID: 21406367 DOI: 10.3382/ps.2010-01181] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023] Open
Abstract
A total of 256 broiler chickens (1 d old) were used in a 32-d growth trial to study the effects of chicory (Cichorium intybus L.) forage and root inclusion on growth performance, digestibility, and gut development. The chicory forage originated from 2 harvests (June and September) and was included at 60 and 120 g/kg. The chicory root was included alone at 60 g/kg or together with chicory forage, from both harvests, in equal amounts (60 g/kg). The cereal-based control diet and 7 experimental diets were fed to each of 4 pens of chickens (8 chickens/pen). A higher BW gain and lower feed conversion ratio were found at 13 d of age in chickens fed the 60 g/kg chicory forage diet (P ≤ 0.05), whereas performance did not differ between the control and 60 g/kg chicory root diets. In contrast, a lower performance and digestibility of DM, organic matter, and AME as well as a thinner cecal mucosa layer were found for the 120 g/kg chicory forage diet (P ≤ 0.05). No diet effects on organ parameters or on pH of cecum digesta were detected. The soluble nonstarch polysaccharides fractions of chicory forage did not have any major negative effects on performance and gut development, and chicory forage from the September harvest was seen to have a higher nutritional value than that from the June harvest. Thus, results from the current study suggest that chicory forage is a potentially useful fiber-rich feed ingredient with high palatability for broiler chickens.
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Zhou MM, Wu YM, Liu HY, Zhao K, Liu JX. Effects of tripeptides and lactogenic hormones on oligopeptide transporter 2 in bovine mammary gland. J Anim Physiol Anim Nutr (Berl) 2010; 95:781-9. [PMID: 21198960 DOI: 10.1111/j.1439-0396.2010.01110.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This study was conducted to investigate the expression of oligopeptide transporter 2 (PepT2) and its potential function in bovine mammary gland. First, the PepT2 mRNA and protein were determined in cultured mammary epithelial cells. Then the effects of lactogenic hormones (prolactin, hydrocortisone or insulin) and substrate (threonyl-phenylalanyl-phenylalanine) on PepT2 were investigated. The PepT2 mRNA and protein were successfully detected in bovine mammary epithelial cells. PepT2 gene expression was enhanced by the addition of 50, 500 and 5000 ng/ml prolactin, 10 and 100 ng/ml hydrocortisone, and 50, 500, 5000 and 50,000 ng/ml insulin. PepT2 mRNA abundance was increased when 5, 10 and 15% of threonyl-phenylalanyl-phenylalanine was included. Responses of PepT2 to lactogenic hormones and oligopeptide inferred that it may play an important role in bovine mammary gland.
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Wang C, Liu HY, Wang YM, Yang ZQ, Liu JX, Wu YM, Yan T, Ye HW. Effects of dietary supplementation of methionine and lysine on milk production and nitrogen utilization in dairy cows. J Dairy Sci 2010; 93:3661-70. [PMID: 20655436 DOI: 10.3168/jds.2009-2750] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 05/06/2010] [Indexed: 11/19/2022]
Abstract
The effect of the content of lysine and methionine in metabolizable protein (MP) on lactation performance and N utilization in Chinese Holstein cows was determined. A control diet (C) was formulated to be adequate in energy but slightly limiting in MP. The concentration of Met and Lys in MP was 1.87 and 5.93%, respectively. The treatments were as follows (% of Met or Lys in MP): L=diet C supplemented with L-lysine-HCl at 0.49% on a dry matter (DM) basis (Met, 1.87; Lys, 7.00); M=diet C supplemented with 2-hydroxy-4-(methylthio)-butanoic acid (HMB) at 0.15% (Met, 2.35; Lys, 5.93); ML=diet C supplemented with 0.49% L-lysine HCl and 0.15% HMB (Met, 2.39; Lys, 7.10). The diets were fed to 60 Chinese Holsteins in mid-lactation (average days in milk=120, and milk yield=32.0 kg/d) for 8 wk. Milk yield was increased by supplementation of either Lys (1.5 kg/d) or Met (2.0 kg/d), and supplementation of both Lys and Met further increased milk yield (3.8 kg/d). There was no significant difference in dry matter intake across treatment groups. Cows on treatments M (3.95%) and ML (3.90%) had higher milk fat content than those on C (3.60%) and L (3.67%), but there were no significant differences in milk protein and lactose contents or somatic cell count among treatments. Supplementation of Met or Lys significantly increased Met or Lys concentration in arterial plasma. Treatment ML had a higher conversion of intake N to milk N and lower urea N concentrations in serum, urine, and milk than did treatment C. Supplementing HMB and L-lysine-HCl to provide approximately 2.3% Met and 7.0% Lys of the MP in diets slightly limiting in MP increased milk production, milk protein yield, and N utilization efficiency.
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Mao WP, Zhang NN, Zhou FY, Li WX, Liu HY, Feng J, Zhou L, Wei CJ, Pan YB, He ZJ. Cadmium directly induced mitochondrial dysfunction of human embryonic kidney cells. Hum Exp Toxicol 2010; 30:920-9. [DOI: 10.1177/0960327110384286] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cadmium (Cd) is the major component of polluted environment, which has numerous undesirable effects on health. Cd could induce apoptosis of HEK293 cells, and the mitochondria may play a key role. However, the mode of action is unclear. In the present study, we aimed to evaluate the ability of the Cd to induce dysfunction of mitochondria. We examined the effect of cadmium chloride (1, 5 and 10 μM) on mitochondrial membrane permeability and potential as well as oxidative stress markers in mitochondria isolated from HEK293 cells. We found that Cd could directly increase in permeability and decrease in membrane potential of mitochondria, even resulted in mitochondrial swelling, and that Cd could inhibit the activities of ATPase, lactate dehydrogenase (LDH), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), enhanced the levels of reactive oxygen species (ROS) and lipid peroxidation (LPO). On the whole, the results show that Cd can directly lead to mitochondrial dysfunction of HEK293 cells, including increased permeability, inhibiting respiration and evoking oxidative stress. Thus, for the first time, this paper makes an overall analysis of Cd-induced changes of structure and function of isolated mitochondria. Our findings may also have general implications in Cd-induced apoptosis by mitochondria pathway.
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Liu HY, Luo XM, Zhou SH, Zheng ZJ. Prognosis and Expression of Lambda Light Chains in Solitary Extramedullary Plasmacytoma of the Head and Neck: Two Case Reports and a Literature Review. J Int Med Res 2010; 38:282-8. [PMID: 20233540 DOI: 10.1177/147323001003800133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Two cases of extramedullary plasmacytoma (EMP) of the head and neck, an uncommon plasma cell neoplasm, were studied. Both patients had good outcomes and have been followed for 17 and 12 years without recurrence or systemic disease. In these two cases, the tumours measured were 4 cm and 0.3 cm, and both cases were positive for lambda light chain restriction on immunohistochemistry. Prognostic factors were considered, based on a review of EMP of the head and neck, including published reports and the authors' clinical experience. Of all plasma cell tumours, EMP has the best prognosis, especially when located in the head and neck region. Variation in the biological behaviour of EMP and the limited number of documented cases make it difficult to determine prognostic factors. Some series have found that age, tumour size, site of origin (extramedullary versus bone), grade, M-protein, light chains and radiotherapy dose all influence the outcome in EMP patients.
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