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Deng R, Yang T, Wang Y, Tang N. CYP2E1 RsaI/PstI polymorphism and risk of anti-tuberculosis drug-induced liver injury: a meta-analysis [Review article]. Int J Tuberc Lung Dis 2012; 16:1574-81. [DOI: 10.5588/ijtld.12.0304] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Miyahara Y, Khattar M, Schroder PM, Mierzejewska B, Deng R, Han R, Hancock W, Chen W, Stepkowski SM. Anti-TCRβ mAb induces long-term allograft survival by reducing antigen-reactive T cells and sparing regulatory T cells. Am J Transplant 2012; 12:1409-18. [PMID: 22420295 PMCID: PMC3365620 DOI: 10.1111/j.1600-6143.2012.04006.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
TCR specific antibodies may modulate the TCR engagement with antigen-MHC complexes, and in turn regulate in vivo T cell responses to alloantigens. Herein, we found that in vivo administration of mAbs specific for mouse TCRβ (H57-597), TCRα or CD3 promptly reduced the number of CD4(+) and CD8(+) T cells in normal mice, but H57-597 mAb most potently increased the frequency of CD4(+) Foxp3(+) Treg cells. When mice were injected with staphylococcal enterotoxin B (SEB) superantigen and H57-597 mAb, the expansion of SEB-reactive Vβ8(+) T cells was completely abrogated while SEB-nonreactive Vβ2(+) T cells remained unaffected. More importantly, transient H57-597 mAb treatment exerted long-lasting effect in preventing T cell responses to alloantigens, and produced long-term cardiac allograft survival (>100 days) in 10 out of 11 recipients. While Treg cells were involved in maintaining donor-specific long-term graft survival, T cell homeostasis recovered over time and immunity was retained against third party allografts. Moreover, transient H57-597 mAb treatment significantly prolonged survival of skin allografts in naïve recipients as well as heart allografts in skin-sensitized recipients. Thus, transient modulation of the TCRβ chain by H57-597 mAb exhibits potent, long-lasting therapeutic effects to control alloimmune responses.
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Fu M, Deng R, Wang J, Wang X. Horizontal gene transfer in herpesviruses identified by using support vector machine. Acta Virol 2011; 55:203-17. [PMID: 21978154 DOI: 10.4149/av_2011_03_203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Horizontal gene transfer (HGT) is the probable origin of new genes. Identification of HGT-introduced genes would be helpful to the understanding of the genome evolution and the function prediction of new genes. In this study, a method using support vector machine (SVM) was used to distinguish horizontally transferred genes and non-horizontally transferred genes of mammalian herpesviruses based on the atypical composition identification, with accuracy higher than 95% within a reasonable length of time by using just a common PC. This identified 302 putative horizontally transferred genes, 171 genes being identified for the first time. Although most putative transferred genes are of unknown function, many genes have been discovered or predicted to encode glycoproteins or membrane proteins.
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Qin W, Lin ZM, Deng R, Li DD, Song Z, Tian YG, Wang RF, Ling JQ, Zhu XF. p38a MAPK is involved in BMP-2-induced odontoblastic differentiation of human dental pulp cells. Int Endod J 2011; 45:224-33. [DOI: 10.1111/j.1365-2591.2011.01965.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Li X, Zhang G, Deng R, Yang Y, Liu Q, Xiao Z, Yang J, Xing G, Zhao D, Cai S. Development of rapid immunoassays for the detection of ractopamine in swine urine. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2010; 27:1096-103. [PMID: 20496250 DOI: 10.1080/19440041003754985] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The monoclonal antibodies (mAbs) against ractopamine (Rac) were prepared and their properties identified by indirect competitive enzyme-linked immunoabsorbant assay (ELISA). The IC(50) of mAbs was 2.7 ng ml(-1) towards Rac or 9.3 ng ml(-1) towards Rac-glucuronides and no cross-reactivity (CR) towards other competitors except dobutamine (CR: 3.76%). Based on the mAbs, the Rac-kit (kit) and Rac-strip (strip) were developed to detect Rac residues in swine urine. The strip and kit assay could be performed within 5-10 min and 2 h, respectively, allowing the analysis of urine samples without the need for sample clean-up. The detection limits were 1 ng ml(-1) for kit and 3 ng ml(-1) with the unaided eye, and 0.2 ng ml(-1) with the Strip Reader for strip. The correlation coefficients (R(2)) were 0.988 for kit in the range 0-128.0 ng ml(-1), and 0.987 for strip in the range 0-10.8 ng ml(-1). Comparing the gas chromatography-mass spectrometry (GC-MS) with the kit or strip in swine urine spiked with Rac standards, the differences ranged from 1.4% to 4.5% for kit and 1.0% to 4.7% for strip. However, the differences were greater than 54% for the kit and 55% for the strip test for the analysis of urine from swine treated with Rac. The results obtained from GC-MS using hydrolysed urine samples were generally in good agreement with those obtained from strip or kit using non-hydrolysed urine samples.
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Polson AG, Williams M, Gray AM, Fuji RN, Poon KA, McBride J, Raab H, Januario T, Go M, Lau J, Yu SF, Du C, Fuh F, Tan C, Wu Y, Liang WC, Prabhu S, Stephan JP, Hongo JA, Dere RC, Deng R, Cullen M, de Tute R, Bennett F, Rawstron A, Jack A, Ebens A. Anti-CD22-MCC-DM1: an antibody-drug conjugate with a stable linker for the treatment of non-Hodgkin's lymphoma. Leukemia 2010; 24:1566-73. [DOI: 10.1038/leu.2010.141] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Deng R, Lu M, Korteweg C, Gao Z, McNutt MA, Ye J, Zhang T, Gu J. Distinctly different expression of cytokines and chemokines in the lungs of two H5N1 avian influenza patients. J Pathol 2008; 216:328-36. [PMID: 18788084 DOI: 10.1002/path.2417] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The pathogenesis of human H5N1 influenza remains poorly understood and controversial. 'Cytokine storm' has been hypothesized to be the main cause of the severity of this disease. However, the significance of this hypothesis has been called into question by a recent report, which demonstrates that inhibition of the cytokine response did not protect against lethal H5N1 influenza infection in mice. Here we showed discrepant findings in two adult H5N1 autopsies and a fetus obtained at autopsy which also raise doubt about this hypothesis. Antigens of 10 cytokines/chemokines which were found to be significantly elevated in previous H5N1-infected patients and in vitro experiments, and mRNA of eight of these, were absent from the lungs of a pregnant woman and her fetus. In contrast, antigens of seven cytokines/chemokines and mRNA of six of these were found to be increased in the lungs of a male autopsy. The cells expressing these cytokines and chemokines were identified as type II pneumocytes, bronchial epithelial cells, macrophages and vascular endothelial cells. Levels of cytokines and chemokines in the serum of the male case were also significantly higher than those of infectious (infection other than by H5N1) and non-infectious controls. In comparison with results from our previous study, it appeared that the male case had increased cytokine/chemokine expression but reduced viral load, while the pregnant female had diminished cytokine/chemokine expression but a significantly increased viral load in the lungs. These disparate findings in these two cases suggest that 'cytokine storm' alone could not be a sufficient explanation for the severe lung injury of this newly emerging disease.
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Fu M, Deng R, Wang J, Wang X. Whole-genome phylogenetic analysis of herpesviruses. Acta Virol 2008; 52:31-40. [PMID: 18459833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A comprehensive phylogenetic analysis of 45 herpesviruses was performed based on whole-genome sequences. We used 4 methods, namely the alignment of conserved gene sequences (excluding 5 herpesviruses), compositional vector tree (CVTree) method, local homology analysis, and gene content analysis. The obtained results showed good consistency between the phylogenetic trees prepared by these methods and likewise, the obtained classification of the herpesviruses was consistent with their current taxonomic designation. The herpesviruses with the ambiguous classification or not assigned in the family or with the newly published genomes were also phylogenetically classified.
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Li J, Luo C, Deng R, Jacoby P, de Klerk N. Maternal mortality in Yunnan, China: recent trends and associated factors. BJOG 2007; 114:865-74. [PMID: 17506792 DOI: 10.1111/j.1471-0528.2007.01362.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Yunnan Province, located in southwest China, is one of the poorest province in China. The maternal mortality ratio (MMR) is about twice the national average (56.2/100,000 live births), and in remote mountainous regions, the rate is five times higher. This study aimed to examine the progress in reduction of maternal mortality in the 1990s and early 2000s and the factors associated with this reduction in Yunnan. DESIGN A population-based, longitudinal, ecological correlation study. SETTING A remote province of China with a proportionately large indigenous population. POPULATION Populations at county, prefecture and provincial level. METHODS Using maternal mortality data collected at the province, prefecture/region and county levels, trend and time series analyses and multivariate linear regression analyses were performed using SPSS (Version 13). MAIN OUTCOME MEASURE MMR and its change over time. RESULTS MMR declined substantially in the 1990s at a rate of 3.0% per year. Utilisation of prenatal and obstetric care increased and was significantly correlated with the declining trend in MMR. Hospital delivery was a strong predictor of MMR, independent of social and economic development. Both low income and illiteracy were significantly associated with increased MMR. CONCLUSIONS Declines in maternal mortality in Yunnan over the past 14 years appear to reflect health, social and economic interventions implemented in the 1990s. The association of hospital delivery with maternal mortality may be due to the effective management of severe pregnancy and birth complications. Low income and illiteracy were associated with MMR but primarily through their impact on the use of prenatal and obstetric care.
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Liu JN, Deng R, Guo JF, Zhou JM, Feng GK, Huang ZS, Gu LQ, Zeng YX, Zhu XF. Inhibition of myc promoter and telomerase activity and induction of delayed apoptosis by SYUIQ-5, a novel G-quadruplex interactive agent in leukemia cells. Leukemia 2007; 21:1300-2. [PMID: 17392822 DOI: 10.1038/sj.leu.2404652] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Deng R, Li W, Guan Z, Zhou JM, Wang Y, Mei YP, Li MT, Feng GK, Huang W, Liu ZC, Han Y, Zeng YX, Zhu XF. Acetylcholinesterase expression mediated by c-Jun-NH2-terminal kinase pathway during anticancer drug-induced apoptosis. Oncogene 2006; 25:7070-7. [PMID: 16715131 DOI: 10.1038/sj.onc.1209686] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
It has been shown that acetylcholinesterase (AChE) expression was induced during apoptosis and the anti-sense oligonucleotides and siRNA of AChE may prevent apoptosis in various cell types. However, the mechanisms underlying AChE upregulation remain elusive. We demonstrated here that c-Jun NH2-terminal kinase (JNK) could mediate AChE expression. In this study, both etoposide and excisanin A, two anticancer agents, induced apoptosis in colon cancer cell line SW620 as determined by Annexin V staining, the cleavage of caspase-3 and the proteolytic degradation of poly (ADP-ribose) polymerase (PARP). The results showed that both the agents upregulated AChE in SW620 cells. In the meantime, JNK was also activated and the expression and phosphorylation of c-Jun increased in SW620 cells exposed to the two agents. The induced AChE mRNA and protein expression could be blocked by SP600125, a specific inhibitor of SAPK/JNK, and small interfering RNA directed against JNK1/2. Transfection with adenovirus-mediated dominant negative c-Jun also blocked the upregulation of AChE expression. Together, these results suggest that AChE expression may be mediated by the activation of JNK pathway during apoptosis through a c-Jun-dependent mechanism.
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Zhou JM, Zhu XF, Lu YJ, Deng R, Huang ZS, Mei YP, Wang Y, Huang WL, Liu ZC, Gu LQ, Zeng YX. Senescence and telomere shortening induced by novel potent G-quadruplex interactive agents, quindoline derivatives, in human cancer cell lines. Oncogene 2006; 25:503-11. [PMID: 16170347 DOI: 10.1038/sj.onc.1209067] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Agents stabilizing G-quadruplexes have the potential to interfere with telomere replication by blocking the elongation step catalysed by telomerase or telomerase-independent mechanism and could therefore act as antitumor agents. In this study, we found that quindoline derivatives interacted preferentially with intramolecular G-quadruplex structures and were novel potent telomerase inhibitors. Treatment with quindoline derivatives reproducibly inhibited telomerase activity in human leukemia K562 cells and colon cancer SW620 cells. N'-(10H-Indolo [3,2-b] quinolin-11-yl)-N, N-dimethyl-propane-1,3-diamine (SYUIQ-5), (one of quindoline derivatives), when added to K562 and SW620 cell culture at nonacute cytotoxic concentrations, increased time of population doublings of K562 and SW620 cells, induced a marked cessation in cell growth and cellular senescence phenotype after 35 and 18 days, respectively. Growth cessation was accompanied by a shortening of telomere length, and induction of p16, p21 and p27 protein expression. However, another compound SYUIQ-7 with greater IC(50) for telomerase had no obvious cellular effect in nonacute cytotoxic concentrations. These results indicate that quindoline derivatives as novel potent G-quadruplex interactive agents induce senescence and telomere shortening in cancer cells and therefore are promising agents for cancer treatment.
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Li Y, Xie M, Yang J, Yang D, Deng R, Wan Y, Yan B. The expression of antiapoptotic protein survivin is transcriptionally upregulated by DEC1 primarily through multiple sp1 binding sites in the proximal promoter. Oncogene 2006; 25:3296-306. [PMID: 16462771 PMCID: PMC4114758 DOI: 10.1038/sj.onc.1209363] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Human differentially expressed in chondrocytes (DEC), mouse stimulated with retinoic acid and rat split and hairy related proteins constitute a structurally distinct class of the basic helix-loop-helix proteins. DEC1 is abundantly expressed in tumors and protects against apoptosis induced by serum starvation. In this study, we report that DEC1 antiapoptosis is achieved by inducing survivin, an antiapoptotic protein. In paired tumor-normal tissues, survivin and DEC1 exhibited a paralleled expression pattern. Tetracycline-induced expression of DEC1 in stable lines proportionally increased the expression of survivin. In reporter assays, DEC1 transactivated the survivin promoter but repressed the DEC2 promoter. In contrast to the repression, the activation was delayed and varied depending on serum concentrations and cycle blockers. Studies with reporter mutants located, in the survivin promoter, two Sp1 sites that supported DEC1 transactivation. Electrophoretic mobility shift assay and chromatin immunoprecipitation detected the presence of DEC1 in the survivin promoter. These findings establish that the survivin gene is a transcription target of DEC1, and induction of survivin is at least in part responsible for DEC1 antiapoptosis.
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Głuch K, Matt-Leubner S, Echt O, Deng R, Andersen J, Scheier P, Märk T. On the kinetic energy release distribution for C2 evaporation from fullerene ions. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2003.12.113] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Deng R, Treat M, Echt O, Hansen K. On the triplet lifetime in free, photo-excited C60. J Chem Phys 2003. [DOI: 10.1063/1.1574801] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yu L, Li JR, Huang YW, Dikki J, Deng R. Molecular Characteristics of Full-Length Genomic Segment A of Three Infectious Bursal Disease Viruses in China: Two Attenuated Strains and One Virulent Field Strain. Avian Dis 2001. [DOI: 10.2307/1592866] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yu L, Li JR, Huang YW, Dikki J, Deng R. Molecular characteristics of full-length genomic segment A of three infectious bursal disease viruses in China: two attenuated strains and one virulent field strain. Avian Dis 2001; 45:862-74. [PMID: 11785891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The full-length cDNA of genomic segment A of three infectious bursal disease viruses, two attenuated strains (HZ2 and JD1) and one virulent field strain (ZJ2000), was amplified in a single step by reverse transcription-polymerase chain reaction, cloned into pGEM-T Easy Vector, and sequenced. The full length of cloned segment A contains 3259 nucleotides, which includes two partially overlapping open reading fragments (ORFs) ORF1 and ORF2, flanked by 5' and 3' noncoding regions. These strains shared high sequence identity with each other either at the nucleotide or deduced amino acid level. Strains HZ2 and JD1 were highly related to two attenuated strains, CEF94 and P2, whereas ZJ2000 was closely related to two other virulent strains, Cu-1 and Harbin. Substitutions of four amino acids at positions 253, 279, 284, and 330, a common feature of attenuated and most virulent strains, were also observed in these three strains. Two major hydrophilic peaks were conserved in the three strains; however, there are two amino acid substitutions at positions 280 (N to S) and 290 (M to L) in the second minor hydrophilic peak for all three strains, which might have a critical influence on antigenicity. Two amino acid substitutions near the VP2-VP4 cleavage site were identified in virulent strain JZ2000, which might be involved in increasing the virulence of the virus. Phylogenetic analyses indicated that these three Chinese strains are most closely related to some European virulent strains but are distinct from very virulent infectious bursal disease virus and variant strains.
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Zhong X, Yuan M, Zhang P, Deng R, Long Q, Pang Y, Wang X. [Identification and location of the toxin protein genes in 56 Bacillus thuringiensis isolates]. WEI SHENG WU XUE BAO = ACTA MICROBIOLOGICA SINICA 2001; 41:293-7. [PMID: 12549082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Polymerase chain reaction was performed to screen Bacillus thuringiensis isolates for cryI, cryIII, and cryV genes with cryI-, cryIII-, and cryV-specific primers respectively. The results indicated that, in the 56 Bt isolates examined, 7 isolates contain cryI gene, 2 isolates contain cryIII gene, and 21 isolates contain both cryI and cryV genes. The cryV gene was located by Southern hybridization in the large plasmid of about 150 MD molecular mass.
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Iorio RM, Field GM, Sauvron JM, Mirza AM, Deng R, Mahon PJ, Langedijk JP. Structural and functional relationship between the receptor recognition and neuraminidase activities of the Newcastle disease virus hemagglutinin-neuraminidase protein: receptor recognition is dependent on neuraminidase activity. J Virol 2001; 75:1918-27. [PMID: 11160691 PMCID: PMC115138 DOI: 10.1128/jvi.75.4.1918-1927.2001] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The terminal globular domain of the paramyxovirus hemagglutinin-neuraminidase (HN) glycoprotein spike has a number of conserved residues that are predicted to form its neuraminidase (NA) active site, by analogy to the influenza virus neuraminidase protein. We have performed a site-directed mutational analysis of the role of these residues in the functional activity of the Newcastle disease virus (NDV) HN protein. Substitutions for several of these residues result in a protein lacking both detectable NA and receptor recognition activity. Contribution of NA activity, either exogenously or by coexpression with another HN protein, partially rescues the receptor recognition activity of these proteins, indicating that the receptor recognition deficiencies of the mutated HN proteins result from their lack of detectable NA activity. In addition to providing support for the homology-based predictions for the structure of HN, these findings argue that (i) the HN residues that mediate its NA activity are not critical to its attachment function and (ii) NA activity is required for the protein to mediate binding to receptors.
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Zeng F, An Y, Ren L, Deng R, Zhang M. Effects of lanthanum and calcium on photoelectron transport activity and the related protein complexes in chloroplast of cucumber leaves. Biol Trace Elem Res 2000; 77:83-91. [PMID: 11097473 DOI: 10.1385/bter:77:1:83] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/1998] [Revised: 10/22/1999] [Accepted: 11/20/1999] [Indexed: 11/11/2022]
Abstract
The effects of lanthanum and calcium ions on electron transport, dichlorephenol indophenol (DCIP) photoreduction, and oxygen evolution activities in chloroplast from cucumber (Cucumis satives L.) were determined. The lanthanum inhibited the whole electron chain-transport activity of chloroplast. DCIP photoreduction and oxygen evolution activities of the photosystem I (PSII) also decrease after treatment with La3+. But the diminished activities of PSII and chloroplast caused by La3+ could be reversed by Ca2+ and even became higher than the control level. The concentration analysis of related protein complexes to photoelectron transport in chloroplast included that La3+ induced the concentration of chlorophyll protein complexes increasing but caused some nonchlorophyll protein complexes to decompose partially. This increasing effect of La3+ on chlorophyll protein complexes results in the improvement of chlorophyll content, which will improve the absorption of photoelectron and energy transport in the process of photosynthesis.
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Lü HT, Deng R, Mou SF. [Study on the analysis of NO2-, Br- and NO3- by ion chromatography in the presence of high mass concentration of chloride]. Se Pu 2000; 18:448-51. [PMID: 12541710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
The effects of high mass concentration chloride on the determination of NO2-, Br- and NO3- were studied on three different analytical columns by ion chromatography. The variations of retention behavior of these anions were caused by self-elution effect and on-column eluent change in the presence of high concentration chloride. When their peaks overlapped with chloride, the deviations of the quantity of weak acid anions were caused by anion-proton interactions within the suppressor. However, the strong acid anions and the other weak acid anions, not overlapped by chloride, were not affected. The linear ranges of these anions in different concentrations of chloride and the maximum chloride concentration allowed to be measured by peak height quantitative method were examined.
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Wu W, Deng R, Ou Y. [Therapeutic efficacy of microsphere-entrapped curcuma aromatica oil infused via hepatic artery against transplanted hepatoma in rats]. ZHONGHUA GAN ZANG BING ZA ZHI = ZHONGHUA GANZANGBING ZAZHI = CHINESE JOURNAL OF HEPATOLOGY 2000; 8:24-6. [PMID: 10712779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
OBJECTIVE To observe the therapeutic efficacy of microsphere-entrapped Curcuma aromatica oil (MS-CAO) infused via hepatic artery against transplanted hepatoma in rats. METHODS One hundred duplicated rats bearing transplanted hepatoma were randomly divided into control group, CAO group, blank microsphere (B-MS) group, high-dose and low-dose MS-CAO groups. Each group included twenty rats. Normal saline (0.2-0.3 ml), CAO (10mg/kg), B-MS (10mg/kg) and MS-CAO (10mg/kg, 5mg/kg) were infused from gastroduodenal artery into hepatic artery, in five groups of rats respectively. The survival periods and the tumor growth rates and necrosis grades were compared in rats among five groups. RESULTS Compared with the control group of rats, the tumor growth rates were significantly inhibited (1.23% +/- 0.66%, 4.86% +/- 1.47% vs 22.44% +/- 17.81%, F=10.21, P<0.01), the tumor necrosis grades were more extensive (Hc=23.63, P<0.01) and the survival periods were also prolonged (25.50 d +/- 3.89 d, 22.70 d +/- 3.92 d vs 11.70 d +/- 1.89 d, F=36.53, P<0.01) in either high-dose or low-dose MS-CAO group. The therapeutic effects of MS-CAO were superior to either CAO or B-MS. CONCLUSION The therapeutic efficacy of MS-CAO infused via hepatic artery against hepatoma was much better than that of CAO or B-MS in the rats bearing transplanted hepatoma.
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Yu L, Song K, Zhang Y, Deng R. Cloning and Expression of the VP2 Gene of an Infectious Bursal Disease Virus. Avian Dis 2000. [DOI: 10.2307/1592521] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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