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Cheng H, Feng Y, Duan Q, Jiang DM, Tao KY. Floating Microparticulate Oral Diltiazem Hydrochloride Delivery System for Improved Delivery to Heart. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i6.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Duan Q, Tait RG, Schneider MJ, Beitz DC, Wheeler TL, Shackelford SD, Cundiff LV, Reecy JM. Sire breed effect on beef longissimus mineral concentrations and their relationships with carcass and palatability traits. Meat Sci 2015; 106:25-30. [PMID: 25866932 DOI: 10.1016/j.meatsci.2015.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 12/10/2014] [Accepted: 03/20/2015] [Indexed: 11/19/2022]
Abstract
The objective of this study was to evaluate sire breed effect on mineral concentration in beef longissimus thoracis (LT) and investigate the correlations between beef mineral concentrations and carcass and palatability traits. Steer progeny (N=246) from the Germplasm Evaluation project-Cycle VIII were used in this study. In addition to carcass traits, LT was evaluated for mineral concentrations, Warner-Bratzler shear force, and palatability traits. A mixed linear model estimated breed effects on mineral concentrations. No significant sire breed (P≥0.43) or dam breed (P≥0.20) effects were identified for mineral concentrations. Pearson correlation coefficients were calculated among mineral concentrations, carcass, and sensory traits. Zinc concentration was positively correlated (P≤0.05) with total iron (r=0.14), heme iron (r=0.13), and magnesium (r=0.19). Significant (P<0.05) correlations were identified between non-heme or heme iron and most traits in this study. Magnesium concentration was correlated with all carcass and palatability traits.
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Cui GF, Wu LF, Wang XN, Jia WJ, Duan Q, Ma LL, Jiang YL, Wang JH. Analysis of genetic relationships and identification of lily cultivars based on inter-simple sequence repeat markers. GENETICS AND MOLECULAR RESEARCH 2014; 13:5778-86. [PMID: 25117336 DOI: 10.4238/2014.july.29.5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Inter-simple sequence repeat (ISSR) markers were used to discriminate 62 lily cultivars of 5 hybrid series. Eight ISSR primers generated 104 bands in total, which all showed 100% polymorphism, and an average of 13 bands were amplified by each primer. Two software packages, POPGENE 1.32 and NTSYSpc 2.1, were used to analyze the data matrix. Our results showed that the observed number of alleles (NA), effective number of alleles (NE), Nei's genetic diversity (H), and Shannon's information index (I) were 1.9630, 1.4179, 0.2606, and 0.4080, respectively. The highest genetic similarity (0.9601) was observed between the Oriental x Trumpet and Oriental lilies, which indicated that the two hybrids had a close genetic relationship. An unweighted pair-group method with arithmetic means dendrogram showed that the 62 lily cultivars clustered into two discrete groups. The first group included the Oriental and OT cultivars, while the Asiatic, LA, and Longiflorum lilies were placed in the second cluster. The distribution of individuals in the principal component analysis was consistent with the clustering of the dendrogram. Fingerprints of all lily cultivars built from 8 primers could be separated completely. This study confirmed the effect and efficiency of ISSR identification in lily cultivars.
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Zhao D, Shi T, Chen C, Si Z, Duan Q, Shi L. Novel 1D Mn(II) complexes containing aromatic dicarboxylic acids. RUSS J COORD CHEM+ 2014. [DOI: 10.1134/s1070328414030117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Casas E, Duan Q, Schneider MJ, Shackelford SD, Wheeler TL, Cundiff LV, Reecy JM. Polymorphisms in calpastatin and mu-calpain genes are associated with beef iron content. Anim Genet 2013; 45:283-4. [PMID: 24303986 DOI: 10.1111/age.12108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2013] [Indexed: 01/19/2023]
Abstract
The objective of this study was to assess the association of markers in the calpastatin and mu-calpain loci with iron in beef cattle muscle. The population consisted of 259 cross-bred steers from Beefmaster, Brangus, Bonsmara, Romosinuano, Hereford and Angus sires. Total iron and heme iron concentrations were measured. Markers in the calpastatin (referred to as CAST) and mu-calpain (referred to as CAPN4751) genes were used to assess their association with iron levels. The mean and standard error for iron and heme iron content in the population was 35.6 ± 1.3 μg and 27.1 ± 1.4 μg respectively. Significant associations (P < 0.01) of markers were observed for both iron and heme iron content. For CAST, animals with the CC genotype had higher levels of iron and heme iron in longissimus dorsi muscle. For CAPN4751, individuals with the TT genotype had higher concentrations of iron and heme iron than did animals with the CC and CT genotypes. Genotypes known to be associated with tougher meat were associated with higher levels of iron concentration.
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Mateescu RG, Garrick DJ, Tait RG, Garmyn AJ, Duan Q, Liu Q, Mayes MS, Van Eenennaam AL, VanOverbeke DL, Hilton GG, Beitz DC, Reecy JM. Genome-wide association study of concentrations of iron and other minerals in longissimus muscle of Angus cattle1. J Anim Sci 2013; 91:3593-600. [DOI: 10.2527/jas.2012-6079] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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Luo X, Duan S, Duan Q, Pu Y, Yang Y, Ding Y, Gao M, He N. Alcohol use and subsequent sex among HIV-infected patients in an ethnic minority area of Yunnan Province, China. PLoS One 2013; 8:e61660. [PMID: 23626712 PMCID: PMC3633954 DOI: 10.1371/journal.pone.0061660] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 03/12/2013] [Indexed: 11/18/2022] Open
Abstract
Objective To examine alcohol use and subsequent HIV risky behaviors among a sample of predominately ethnic minority people living with HIV/AIDS (PLWHA) in a rural community in Yunnan Province, China. Method A cross-sectional study with a face-to-face questionnaire interview was conducted among eligible participants. Results In total, 455 (94.4%) out of 482 eligible HIV patients participated in the study. Of them, 82.6% were ethnic minorities; 15.4% were never married; 96.5% were sexually experienced; 55.4% had used drugs, 67% were receiving antiretroviral therapy (ART). Over 65% were ever drinkers; of whom 61.5% were current drinkers. Among current drinkers, 32.4% drank daily and 41.2% were hazardous drinkers. Chinese white wine was the preferred choice. Higher level of alcohol use among drinkers in the preceding month was positively associated with being males (OR = 2.76, 95%CI: 1.03–7.43), ethnic minorities (OR Jingpo = 2.21, 95%CI: 1.06–4.59; OR other minorities = 3.20, 95%CI: 1.34–7.62), higher education (OR1–6 = 1.98, 95%CI: 0.99–3.96; OR≥7 = 2.35, 95%CI: 1.09–5.06) and being ART-naive (OR = 2.69, 95%CI: 1.67–4.32). About 39% of ever drinkers reported having engaged in sex after drinking since HIV diagnosis. Those who were younger than 46 years (OR16–25 = 7.77, 95%CI: 1.22–49.60, OR26–35 = 2.79, 95%CI: 1.06–7.35, OR36–45 = 2.96, 95%CI: 1.57–7.58), hazardous drinkers (OR = 1.99, 95%CI: 1.00–3.97) and drug users (OR = 3.01, 95%CI: 1.19–7.58) were more likely to have had sex after drinking. Approximately 56% of drug users had used drugs after drinking. Conclusions High prevalence of alcohol use and subsequent risky behaviors including sexual engagement and drug use among HIV patients in rural Yunnan require tremendous and integrated efforts for prevention and control of alcohol and drug abuse and HIV spreading.
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Duan Q, Liao T, Yi H. A comparative study of different local search application strategies in hybrid metaheuristics. Appl Soft Comput 2013. [DOI: 10.1016/j.asoc.2012.05.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Buchanan JW, Garmyn AJ, Hilton GG, VanOverbeke DL, Duan Q, Beitz DC, Mateescu RG. Comparison of gene expression and fatty acid profiles in concentrate and forage finished beef1. J Anim Sci 2013; 91:1-9. [DOI: 10.2527/jas.2012-5154] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mateescu RG, Garmyn AJ, Tait RG, Duan Q, Liu Q, Mayes MS, Garrick DJ, Van Eenennaam AL, Vanoverbeke DL, Hilton GG, Beitz DC, Reecy JM. Genetic parameters for concentrations of minerals in longissimus muscle and their associations with palatability traits in Angus cattle. J Anim Sci 2012; 91:1067-75. [PMID: 23230113 DOI: 10.2527/jas.2012-5744] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to estimate genetic parameters for concentrations of minerals in LM and to evaluate their associations with beef palatability traits. Samples of LM from 2,285 Angus cattle were obtained and fabricated into steaks for analysis of mineral concentrations and for trained sensory panel assessments. Nine minerals, including calcium, copper, iron, magnesium, manganese, phosphorus, potassium, sodium, and zinc, were quantified. Restricted maximum likelihood procedures were used to obtain estimates of variance and covariance components under a multiple-trait animal model. Estimates of heritability for mineral concentrations in LM varied from 0.01 to 0.54. Iron and sodium were highly and moderately heritable, respectively, whereas the other minerals were lowly heritable except for calcium, copper, and manganese, which exhibited no genetic variation. Strong positive genetic correlations existed between iron and zinc (0.49, P < 0.05), between magnesium and phosphorus (0.88, P < 0.05), between magnesium and sodium (0.68, P < 0.05), and between phosphorus and potassium (0.69, P < 0.05). Overall tenderness assessed by trained sensory panelists was positively associated with manganese, potassium, and sodium and negatively associated with phosphorus and zinc concentrations (P < 0.05). Juiciness assessed by trained sensory panelists was negatively associated with magnesium and positively associated with manganese and sodium concentrations (P < 0.05). Livery or metallic flavor was not associated with any of the minerals (P > 0.05). Beefy flavor was positively associated with calcium, iron, and zinc and negatively associated with sodium concentration, whereas a painty or fishy flavor was positively associated with sodium and negatively associated with calcium and potassium concentrations (P < 0.05). Beef is a major contributor of iron and zinc in the human diet, and these results demonstrate sufficient genetic variation for these traits to be improved through marker-assisted selection programs without compromising beef palatability.
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Shen H, Bai B, Hou J, Sun Y, Hu Y, Duan Q, Gao R, Zhu H, Kong W, Xu D, Zhao J, Wang H, Mao P. OPV-like poliovirus type 1 detection in patients with severe acute respiratory syndrome. Infection 2012; 40:455-8. [PMID: 22371233 PMCID: PMC7099907 DOI: 10.1007/s15010-012-0244-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 02/04/2012] [Indexed: 10/28/2022]
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Liu Y, Lu Z, Fan P, Duan Q, Li Y, Tong S, Hu B, Lv R, Hu L, Zhuang J. Clinical efficacy of chemotherapy combined with verapamil in metastatic colorectal patients. Cell Biochem Biophys 2011; 61:393-8. [PMID: 21562945 DOI: 10.1007/s12013-011-9198-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In order to determine the clinical efficacy and adverse reactions of chemotherapy and verapamil infusion through a target artery to treat colorectal cancer patients with metastasis after failure with previous conventional treatments. Patients with metastatic colon cancer (n = 36) received an infusion of verapamil, interleukin-2, oxaliplatin (or hydroxy camptothecin or irinotecan hydrochloride), fluorouracil and calcium folinate through target artery using the Seldinger puncture technique. From the second day of infusion, the patients were treated with fluorouracil and calcium folinate via systematic intravenous injection for 2-3 days. Efficacy was evaluated after at least two treatment courses. The objective response including complete or partial response was 58.3% in the 36 patients; clinical benefit rate, evaluated by Karnofsky Performance Status score was 91.7%; by weight was 83.3%; by the amount of painkiller consumed was 80.6%. No patient experienced side effects associated with heart function. Post-treatment, the P-R period, Q-T period, QRS, and heart rate were not significantly different than before treatment. Liver function was significantly improved. Side effects of chemotherapy were minor in comparison to those observed with intravenous chemotherapy. Infusion of verapamil and chemotherapy directly into pelvic tumor tissue can increase treatment efficacy and has been shown to be a relatively safe technique.
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Duan Q, Tait RG, Mayes MS, Garrick DJ, Liu Q, Van Eenennaam AL, Mateescu RG, Van Overbeke DL, Garmyn AJ, Beitz DC, Reecy JM. Genetic polymorphisms in bovine transferrin receptor 2 (TFR2) and solute carrier family 40 (iron-regulated transporter), member 1 (SLC40A1) genes and their association with beef iron content. Anim Genet 2011; 43:115-22. [PMID: 22404347 DOI: 10.1111/j.1365-2052.2011.02224.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Beef is considered to be an excellent source of dietary iron. However, little is known about the genetic control of beef iron content. We hypothesized that genetic polymorphisms in transferrin receptor 2 (TFR2) and solute carrier family 40 (iron-regulated transporter), member 1 (SLC40A1) could influence skeletal muscle iron content. The objective of this study was to use Angus cattle to identify single-nucleotide polymorphisms (SNPs) in the exons and flanking regions of the bovine TFR2 and SLC40A1 genes and to evaluate the extent to which genetic variation in them was associated with bovine longissimus dorsi muscle iron content. Ten novel SNPs were identified in TFR2, of which one SNP tended to be associated (P < 0.013) with skeletal muscle iron content. Nine novel SNPs in SLC40A1, NC007300: rs133108154, rs137140497, rs135205621, rs136600836, rs134388440, rs136347850, rs134186279, rs134621419 and rs137555693, were identified, of which SNPs rs134388440, rs136347850 and rs137555693 were significantly associated (P < 0.007) with skeletal muscle iron content. High linkage disequilibrium was observed among SLC40A1 SNPs rs134388440, rs136347850 and rs137555693 (R(2) > 0.99), from which two haplotypes, TGC and CAT, were defined. Beef from individuals that were homozygous for the TGC haplotype had significantly (P < 0.001) higher iron content than did beef from CAT homozygous or heterozygous individuals. The estimated size of effect of the identified haplotypes was 0.3% of the phenotypic variance. In conclusion, our study provides evidence for genetic control of beef iron concentration. Moreover, SNPs identified in SLC40A1, rs134388440, rs136347850 and rs137555693 might be useful markers for the selection of Angus cattle for altered iron content.
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Garmyn AJ, Hilton GG, Mateescu RG, Morgan JB, Reecy JM, Tait RG, Beitz DC, Duan Q, Schoonmaker JP, Mayes MS, Drewnoski ME, Liu Q, VanOverbeke DL. Estimation of relationships between mineral concentration and fatty acid composition of longissimus muscle and beef palatability traits. J Anim Sci 2011; 89:2849-58. [PMID: 21512113 DOI: 10.2527/jas.2010-3497] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to determine the influence of beef LM nutrient components on beef palatability traits and evaluate the impact of USDA quality grade on beef palatability. Longissimus muscle samples from related Angus cattle (n = 1,737) were obtained and fabricated into steaks for trained sensory panel, Warner-Bratzler shear force (WBSF), lipid oxidation measured by thiobarbituric acid reactive substances (TBARS), fatty acid, and mineral composition analysis. Pearson phenotypic correlations were obtained by the correlation procedure of SAS. Beef palatability data were analyzed by the GLM procedure of SAS with USDA quality grade as the main effect. Specific mineral concentrations did not demonstrate strong correlations with WBSF or sensory traits (r = -0.14 to 0.16). However, minerals appeared to have a stronger relationship with flavor; all minerals evaluated except Ca and Mn were positively correlated (P < 0.05) with beef flavor. Stearic acid (C18:0), C18:2, C20:4, and PUFA were negatively correlated (P < 0.05) with all 3 panelist tenderness traits (r = -0.09 to -0.22) and were positively correlated (P < 0.05) with WBSF (r = 0.09 to 0.15). The MUFA were positively correlated (P < 0.05) with panelist tenderness ratings (r = 0.07 to 0.10) and negatively associated (P < 0.05) with WBSF (r = -0.11). The strongest correlations with juiciness were negative relationships (P < 0.05) with C18:2, C18:3, C20:4, and PUFA (r = -0.08 to -0.20). Correlations with beef flavor were weak, but the strongest was a positive relationship with MUFA (r = 0.13). Quality grade affected (P < 0.05) WBSF, TBARS, and all trained sensory panel traits, except livery/metallic flavor. As quality grade increased, steaks were more tender (P < 0.05), as evidenced by both WBSF and sensory panel tenderness ratings. Prime steaks were rated juiciest (P < 0.05) by panelists, whereas Select and Low Choice were similarly rated below Top Choice for sustained juiciness. Quality grade influenced (P < 0.05) beef flavor, but not in a linear fashion. Although there were significant correlations, these results indicate tenderness, juiciness, and flavor are not strongly influenced by individual nutrient components in beef LM. Furthermore, the positive linear relationships between USDA quality grade and beef palatability traits suggest quality grade is still one of the most valuable tools available to predict beef tenderness.
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Shafey M, Duan Q, Russell J, Duggan P, Balogh A, Stewart D. Double High Dose Salvage Therapy With Dose-Intensified Cyclophosphamide, Etoposide, and Cisplatin (DICEP) Re-Induction Followed by High-Dose Melphalan (HDM) and Autologous Stem Cell Transplantation (ASCT) Consolidation for Relapsed/Refractory Hodgkin Lymphoma. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chen S, Duan Q, Tang K, Zhao D, Xu Y. Serotonin and catecholaminergic polymorphic ventricular tachycardia: a possible therapeutic role for SSRIs? Cardiovasc J Afr 2010; 21:225-8. [PMID: 20838725 PMCID: PMC5592324 DOI: 10.5830/cvja-2010-023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare malignant arrhythmia, usually diagnosed in the adolescent years. The diagnosis can typically be made by one or more of the following: a positive family history, exercise electrocardiography, ambulatory ECG monitoring and/ or an intra-cardiac, electrophysiological examination. This is a case report of a patient with CPVT that was refractory to treatment with beta-blockade and an implanted automatic cardioverter defibrillator. However, after a selective serotonin re-uptake inhibitor (SSRI) was added to the therapeutic regimen, no further episodes of ventricular tachycardia occurred during the following two years.
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Dai H, Chu L, Song S, Li W, Zhang L, Wu Z, Zeng J, Duan Q. Prevalence of and risk factors for fatty liver disease in a professional population of Wuhan, China. Public Health 2009; 123:545-8. [DOI: 10.1016/j.puhe.2009.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Revised: 05/21/2009] [Accepted: 07/09/2009] [Indexed: 01/06/2023]
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Duan Q, Komissarova E, Dai W. Arsenic trioxide suppresses paclitaxel-induced mitotic arrest. Cell Prolif 2009; 42:404-11. [PMID: 19397590 DOI: 10.1111/j.1365-2184.2009.00606.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES To understand if there exists a functional interaction between arsenic trioxide and paclitaxel in vitro. MATERIALS AND METHODS HeLa and HCT116 (rho53(+/+) and rho53(-/-)) cells were treated with As2O3 and/or paclitaxel for various times. Treated cells were collected for analyses using a combination of flow cytometry, fluorescence microscopy and Western blotting. RESULTS Because As(2)O(3) is capable of inhibiting tubulin polymerization and inducing mitotic arrest, we examined whether there existed any functional interaction between As(2)O(3) and paclitaxel, a well-known microtubule poison. Flow cytometry and fluorescence microscopy revealed that although As(2)O(3) alone caused a moderate level of mitotic arrest, it greatly attenuated paclitaxel-induced mitotic arrest in cells with p53 deficiency. Western blot analysis showed that As(2)O(3) significantly blocked phosphorylation of BubR1, Cdc20, and Cdc27 in cells treated with paclitaxel, suggesting that arsenic compromised the activation of the spindle checkpoint. Our further studies revealed that the attenuation of paclitaxel-induced mitotic arrest by As(2)O(3) resulted primarily from sluggish cell cycle progression at S phase but not enhanced mitotic exit. CONCLUSION The observations that As(2)O(3) has a negative impact on the cell cycle checkpoint activation by taxol should have significant clinical implications because the efficacy of taxol in the clinics is associated with its ability to induce mitotic arrest and subsequent mitotic catastrophe.
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Hunter C, Duggan MA, Duan Q, Power P, Gregoire J, Nation J. Cytology and outcome of LSIL: cannot exclude HSIL compared to ASC-H. Cytopathology 2009; 20:17-26. [DOI: 10.1111/j.1365-2303.2008.00561.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Song L, Li Y, Liu G, He J, Zhu H, Duan Q. Genotyping of Chlamydophila psittaci strains derived from avian and mammalian species. Vet Res Commun 2009; 33:577-80. [PMID: 19140022 DOI: 10.1007/s11259-008-9198-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2008] [Indexed: 11/28/2022]
Abstract
Eleven Chlamydophila (formerly Chlamydia) psittaci strains derived from avian and mammalian species (two from dairy cows, one from duck, three from sheep, three from wild birds, and two from pigs) were identified as genotype C by outer membrane protein A gene sequencing. Genotype C had been preferentially associated with waterfowl. This paper suggests that mammals may represent an underestimated source for genotype C strains and for human psittacosis cases.
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Xue YJ, Gao PY, Duan Q, Lin Y, Dai CB. Preliminary study of hemodynamic distribution in patient-specific stenotic carotid bifurcation by image-based computational fluid dynamics. Acta Radiol 2008; 49:558-65. [PMID: 18568543 DOI: 10.1080/02841850801918548] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Regions prone to atherosclerosis, such as bends and bifurcations, tend to exhibit a certain degree of non-planarity or curvature, and these geometric features are known to strongly influence local flow patterns. Recently, computational fluid dynamics (CFD) has been used as a means of enhancing understanding of the mechanisms involved in atherosclerotic plaque formation and development. PURPOSE To analyze flow patterns and hemodynamic distribution in stenotic carotid bifurcation in vivo by combining CFD with magnetic resonance angiography (MRA). MATERIAL AND METHODS Twenty-one patients with carotid atherosclerosis proved by digital subtraction angiography (DSA) and/or Doppler ultrasound underwent contrast-enhanced MR angiography of the carotid bifurcation by a 3.0T MR scanner. Hemodynamic variables and flow patterns of the carotid bifurcation were calculated and visualized by combining vascular imaging postprocessing with CFD. RESULTS In mild stenotic cases, there was much more streamlined flow in the bulbs, with reduced or disappeared areas of weakly turbulent flow. Also, the corresponding areas of low wall shear stress (WSS) were reduced or even disappeared. As the extent of stenosis increased, stronger blood jets formed at the portion of narrowing, and more prominent eddy flows and slow back flows were noted in the lee of the stenosis. Regions of elevated WSS were predicted at the portion of stenosis and in the path of the downstream jet. Areas of low WSS were predicted on the leeward side of the stenosis, corresponding with the location of slowly turbulent flows. CONCLUSION CFD combined with MRA can simulate flow patterns and calculate hemodynamic variables in stenotic carotid bifurcations as well as normal ones. It provides a new method to investigate the relationship of vascular geometry and flow condition with atherosclerotic pathological changes.
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Russell J, Duan Q, Chaudhry A, Brown C, Bahlis N, Savoie L, Daly A, Geddes M, Storek J, Balogh A, Zacarias N, Duggan P, Quinlan D, Turner R, Larratt L, Stewart D. 276: Myeloablative Transplantation from Matched Siblings (MSD) using a Daily Intravenous Busulfan (Bu)/fludarabine (Flu) Regimen with Thymoglobulin (TG): Analysis Involving 200 Patients Indicates Low Transplant-related Mortality (TRM) in all but Older Patients with High-risk Disease. Biol Blood Marrow Transplant 2008. [DOI: 10.1016/j.bbmt.2007.12.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yang YL, Duan Q, Guo TB, Wang XX, Ruan Q, Xu GT, Zhang JW, Lu ZY, Xu M, Lu L, Dai W. BubR1 deficiency results in enhanced activation of MEK and ERKs upon microtubule stresses. Cell Prolif 2007; 40:397-410. [PMID: 17531083 PMCID: PMC6495970 DOI: 10.1111/j.1365-2184.2007.00443.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2006] [Accepted: 01/30/2007] [Indexed: 01/22/2023] Open
Abstract
UNLABELLED Disruption of microtubules activates the spindle checkpoint, of which BubR1 is a major component. Our early studies show that BubR1 haplo-insufficiency results in enhanced mitotic slippage in vitro and tumorigenesis in vivo. OBJECTIVE Given that both MAPKs/ERKs and MEK play an important role during mitosis, we investigated whether there existed regulatory relationship between the MAPK signalling pathway and BubR1. METHOD AND RESULTS Here, we have demonstrated that BubR1 deficiency is correlated with enhanced activation of MEK and ERKs after disruption of microtubule dynamics. Specifically, treatment with nocodazole and paclitaxel resulted in hyper-activation of ERKs and MEK in BubR1(+/-) murine embryonic fibroblasts (MEF) compared to that of wild-type MEFs. This enhanced activation of ERKs and MEK was at least partly responsible for more successful proliferation completion when cells were treated with nocodazole. BubR1 knockdown via RNAi resulted in enhanced activation of ERKs and MEK in HeLa cells, correlating with inhibition of PP1, a negative regulator of MEK. Moreover, when BubR1 was partially inactivated due to premature missegregation of chromosomes after Sgo1 depletion, phosphorylation of ERKs and MEK was enhanced in mitotic cells; in contrast, little, if any activated ERKs and MEK were detected in mitotic cells induced by nocodazole. Furthermore, BubR1, activated ERKs and activated MEK all localized to spindle poles during mitosis, and also, the proteins physically interacted with each other. CONCLUSION Our studies suggest that there exists a cross-talk between spindle checkpoint components and ERKs and MEK and that BubR1 may play an important role in mediating the cross-talk.
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Chamla DD, Nie S, Duan Q. Retrospective descriptive study of adult tuberculosis in Wuhan, China. Int J Tuberc Lung Dis 2004; 8:730-6. [PMID: 15182143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
OBJECTIVE To determine the rate and associated factors of adult tuberculosis (TB) in the central Chinese city of Wuhan. DESIGN A retrospective descriptive study of 417 patients registered for TB treatment from 1 January to 31 December 2001. RESULTS The mean age of admission was 38.47 (median 35) years, with males aged 20-40 years mostly affected; 191 (45.8%) TB patients were classified as smear-positive, 221 (53%) smear-negative and for five (1.2%) the sputum results were not known. Of all admissions, 43 (10.32%) were retreatment cases and 50 (11.99%) were diagnosed as extra-pulmonary TB. All patients were treated under the DOTS strategy, with 391 (93.76%) cures, five (1.2%) treatment completed, five (1.2%) treatment failures, four (0.96%) deaths, three (0.72%) defaults and nine (2.16%) transfers out. Cure was associated with age (chi2 = 3.92, P < 0.05), but not with sex, retreatment TB, extra-pulmonary TB, type of treatment regimen, BCG status or delay in treatment (P > 0.05). CONCLUSION DOTS provides high TB cure rates. The reasons for the low detection rates, high retreatment rates and the increasing number of young adults affected by TB need further elucidation. For these purposes, routine human immunodeficiency virus screening and sputum culture for multidrug-resistant tuberculosis and case detection may be required.
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Ding Y, Xu Y, Zhang Z, Duan Q, Chen J. [Effects of hypoxia on the expression of protein kinase C mRNA in pulmonary artery smooth muscle and endothelial cell]. ZHONGHUA BING LI XUE ZA ZHI = CHINESE JOURNAL OF PATHOLOGY 2001; 30:202-6. [PMID: 11866979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the effects of hypoxia on the expression of PKC mRNA in pulmonary artery smooth muscle cells (PASMC) and endothelial cells. METHODS In situ hybridization technique was used to detect the expression of PKC mRNA in different segments of pulmonary artery smooth muscle and endothelial cell (EC) in rats, and the effect of hypoxia on the expression of PKC alpha mRNA in pulmonary artery smooth muscle and endothelial cells in vivo and in vitro. RESULTS PKC alpha mRNA was expressed in normal PASMC and EC in rats. The expression of PKC alpha mRNA was higher in the PASMC of intra-acinar pulmonary arteriole than that of muscular arteriole (P < 0.01). In 14 and 28 days of hypoxia, the expression of PKC alpha mRNA was higher both in EC of intraacinar pulmonary arteriole and muscular arteriole and PASMC of intra-acinar pulmonary arteriole (P < 0.01). After 14 days of hypoxia, the expression of PKC alpha mRNA was not significantly changed. But by 28 days, it became significantly higher (P < 0.01). PKC alpha mRNA was expressed in normal PASMC and EC in pigs in vitro. After 1 h of hypoxia, no change was detected, but PKC alpha mRNA expression was significantly higher after 48 h and 72 h of hypoxia in PASMC and EC in vitro (P < 0.01). CONCLUSIONS Hypoxia can promote expression of PKC alpha m RNA in PASMC and EC, especially in the PASMC of intra-acinar pulmonary arterioles. PKC alpha may play an important role in the development of hypoxia pulmonary hypertension.
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