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Carvalho D, Bjerke L, Bax D, Chen L, Kozarewa I, Baker S, Grundy R, Ashworth A, Lord C, Hargrave D, Reis RM, Jones C, Bender S, Feng W, Jones DT, Kool M, Cin H, Pleier S, Hutter S, Sturm D, Liu HK, Korshunov A, Lichter P, Pfister SM, Alimova I, Birks DK, Harris P, Venkataraman S, Marquez VE, Foreman NK, Vibhakar R, Whiteway S, Harris P, Venkataraman S, Birks DK, Donson A, Foreman NK, Vibhakar R, Xipell E, Jauregui P, Gonzalez M, tejada-solis S, Diez-Valle R, Tunon T, Zazpe I, Zazpe I, Mora J, Carcaboso AM, Gomez-MAnzano C, Fueyo J, Alonso M, Dorris K, Sobo M, Holden P, Panditharatna E, Li S, Margol A, Stephenson C, Miles L, Goldman S, Asgharzadeh S, Onar A, Fouladi M, Drissi R, Erdreich-Epstein A, Ren X, Zhou H, Snyder K, Stamper M, Perez J, Nazarian J, Gershon T, Crowther A, Garcia I, Gama V, Yuan H, Chang S, Deshmukh M, Hutt M, Goldstein W, Nazarian J, Price A, Lim KJ, Warren K, Chang H, Eberhart CG, Raabe EH, Karakoula K, Phipps KP, Harkness W, Hayward R, Thompson D, Jacques TS, Darling JL, Warr TJ, Guldal C, Potts C, Rotenberry R, Kenney AM, Amani V, Griesinger AM, Donson AM, Bemis LT, Birks DK, Schittone SK, Morgan M, Thorburn A, Foreman NK, Mulcahy-Levy J, Kolkowitz I, Andor N, Jensen T, Banerjee A, Gupta N, Petritsch C, Taylor M, Hashizume R, Tom M, Haas-Kogan D, Mueller S, Stearns D, Ma N, Eberhart CG, Levy R, Gate D, Rodriguez J, Breunig J, Danielpour M, Town T. LAB-PEDIATRICS LABORATORY RESEARCH. Neuro Oncol 2012; 14:vi116-vi119. [PMCID: PMC3488789 DOI: 10.1093/neuonc/nos235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
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Hu FQ, Chen WW, Zhao MD, Yuan H, Du YZ. Effective antitumor gene therapy delivered by polyethylenimine-conjugated stearic acid-g-chitosan oligosaccharide micelles. Gene Ther 2012; 20:597-606. [PMID: 22951455 DOI: 10.1038/gt.2012.72] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Non-viral vesicle composing of low-molecular weight polyethylenimine-conjugated stearic acid-g-chitosan oligosaccharide (CSOSA-g-PEI) was synthesized for gene delivery and therapy. The synthesized CSOSA-g-PEI had good ion-buffer capabilities and DNA-binding capacity, which could form positively charged nano-sized particles (100-150 nm) with plasmid DNA; in vitro gene transfection tests demonstrated that CSOSA-g-PEI presented much lower cytotoxicity and corresponding transfection efficiency in comparison with Lipofectamine 2000 in both human cancer cells (Hela and MCF-7). The gene transfection of CSOSA-g-PEI/pDNA could be further enhanced in the presence of serum or by adding arginine during incubation of CSOSA-g-PEI micelles with plasmid DNA. The biodistribution experiments demonstrated CSOSA-g-PEI conjugate highly localized in the tumor tissue and indicated a persistently increased accumulation. In vivo antitumor activity results showed that CSOSA-g-PEI/plasmid pigment epithelium-derived factor formulation could effectively suppress the tumor growth (above 60% tumor inhibition) without systematic toxicity against animal body after intravenous injection.
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Li L, Zeng HW, Liu F, Zhang JG, Yue RC, Lu WQ, Yuan X, Dai WX, Yuan H, Sun QY, Huang J, Li HL, Li YS, Shan L, Zhang WD. Target Identification and Validation of (+)-2-(1-Hydroxyl-4-Oxocyclohexyl) Ethyl Caffeate, an Anti-Inflammatory Natural Product. EUR J INFLAMM 2012. [DOI: 10.1177/1721727x1201000306] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
(+)-2-(1-hydroxyl-4-oxocyclohexyl) ethyl caffeate (HOEC) was isolated from Incarvillea mairei var. granditlora (Wehrhahn) Grierson. The plants of the Incarvillea genus have long been used as folk medicines for the treatment of inflammation-related diseases in China. 5-Lipoxygenase (5-LOX), a key enzyme in the arachidonic acid (AA) cascade, was identified as a potential target of HOEC by a pulldown assay, and then extensively validated by biosensor-based affinity detection, enzyme-based activity assays, cell-based AA metabolite analysis and computer-aided AA network simulation. Further in vivo studies of AA-induced ear oedema, ovalbumin (OVA)-induced lung inflammation and collagen-induced arthritis demonstrated the anti-inflammatory potency and validated the therapeutic target of HOEC. This work revealed that HOEC acted as an anti-inflammatory agent targeting 5-LOX, which not only confirmed the key role of 5-LOX in inflammation but also provided a paradigm for the exploration of natural product mechanisms of action.
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Zhou Q, Ruan ZR, Yuan H, Zeng S. CYP2C9*3(1075A>C), MDR1 G2677T/A and MDR1 C3435T are determinants of inter-subject variability in fluvastatin pharmacokinetics in healthy Chinese volunteers. ACTA ACUST UNITED AC 2012; 62:519-24. [PMID: 22941809 DOI: 10.1055/s-0032-1323696] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
To evaluate the impact of single-nucleotide polymorphisms (SNPs) in CYP2C9, MDR1, SLCO1B1 and ABCG2 on the pharmacokinetics of fluvastatin in Chinese participants.A pharmacokinetic study of fluvastatin (single dose 40 mg) was conducted in 12 healthy Chinese volunteers. Plasma concentrations of fluvastatin were determined by a high-performance liquid chromatography with fluorescence detection. Pharmacokinetic parameters were calculated by non-compartmental method. The SNPs were determined by TaqMan®(MGB) genotyping assay.Effect of CYP2C9*3 (c.1075A>C) on area under the plasma concentration-time curve (AUC) of fluvastatin was statistically significant. Heterozygous variant (C/A) carriers had higher AUC values compared to homozygous wild type (A/A) carriers (922.03±148.17 µg · h · L - 1 vs. 496.00±168.93 µg · h · L - 1, P=0.003092). The elimination half-life (T 1/2) values of fluvastatin were longer in MDR1 2677non-G carriers than in MDR1 2677G carriers (2.21±0.47 h vs. 1.25±0.62 h, P=0.02319), and also they were longer in MDR1 1236T-2677non-G-3435T carriers than in MDR1 1236C-2677G-3435C carriers (2.31±0.51 h vs. 1.32±0.62 h, P=0.03320). MDR1 C3435T polymorphism had a significant effect on maximal plasma concentrations (C max) of fluvastatin. Mutation gene T (TT+CT) carriers had higher C max values compared to homozygous wild type (C/C) carriers (688.54±142.67 µg · L - 1 vs. . 413.78±177.83 µg · L - 1, P=0.01448). Some SNPs such as MDR1 C1236T, ABCG2 c.34G>A, ABCG2 c.421C>A, SLCO1B1 c.388 A>G, SLCO1B1 c.521 T>C, SLCO1B1 c.571 T>C and SLCO1B1 c.597 C>T have no significant effects on fluvastatin pharmacokinetics.CYP2C9*3(1075A>C), MDR1 C3435T and MDR1 G2677T/A were determinants of inter-subject variability in fluvastatin pharmacokinetics in healthy Chinese volunteers.
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Wu L, Wang Y, Zheng L, Li J, Hu D, Xu Y, Hasimu B, Yuan H, Yang J, Sun Y, Ma Y. Distribution of brachial-ankle pulse wave velocity values and optimal cut-off in distinguishing subjects with clinical condition in Chinese population. INT ANGIOL 2012; 31:252-259. [PMID: 22634980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM The present study aims to examine the distribution and gender- and age-specific reference ranges of brachial-ankle pulse wave velocity (baPWV) in Chinese population. METHODS A total of 21094 subjects were recruited into a cross-sectional study from June 2007 to June 2008 in China. Participants were divided into three clinical subgroups: 1) subgroup 1: subjects with atherosclerotic cardiovascular diseases; 2) subgroup 2: subjects with atherosclerotic risk factors; and 3) subgroup 3: "healthy subjects" without any atherosclerotic cardiovascular diseases and atherosclerotic risk factors. RESULTS The average baPWV among subgroups one through 3 was 1724.3±429.1, 1603.5±358.8, and 1389.9±288.4 cm/s, respectively. BaPWV did not fit as a normal distribution in both genders. There was no significant difference between male and female for baPWV in subgroup 1 (P>0.05). While baPWV was higher in females than males in subgroup 2, it was lower in females than in males in subgroup 3 (all P<0.05). Notably, BaPWV significantly increased with age in both genders (all P for trend<0.05). The receiver operator characteristic curve demonstrated that a baPWV of 1450 cm/s was useful to discriminate either cardiovascular diseases or atherosclerotic risk factors (sensitivity 62.1%, specificity 69.5%), a baPWV of 1551 cm/s was useful to discriminate cardiovascular diseases (sensitivity 62%, specificity 61%), and a baPWV of 1566 cm/s was useful to discriminate either cardiovascular diseases or chronic kidney disease (sensitivity 60%, specificity 63%). CONCLUSION The reference ranges and cut-off values of baPWV can be used to screen atherosclerotic cardiovascular diseases in clinical practices.
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Wang J, Zhu L, Jiang Y, Meng N, Ran W, Yuan H, Liu C, Qu A, Yang R. PO-371 IMAGE-GUIDED IODINE-125 PERMANENT IMPLANTATION AS SALVAGE THERAPY FOR RECURRENT HEAD AND NECK CARCINOMA. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)72337-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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-Y. Li M, W.Y. Kong A, Yuan H, T. Ma L, K.Y. Hsin M, Y.P. Wan I, J. Underwood M, G. Chen G. Pioglitazone Prevents Smoking Carcinogen-Induced Lung Tumor Development in Mice. Curr Cancer Drug Targets 2012; 12:597-606. [DOI: 10.2174/156800912801784848] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 11/16/2011] [Accepted: 01/19/2012] [Indexed: 11/22/2022]
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Phillips JT, Fox R, Miller D, Kita M, Hutchinson M, Havrdova E, Raghupathi K, Yuan H, Novas M, Viglietta V, Dawson K. Safety and Tolerability of BG-12 in Patients with Relapsing-Remitting Multiple Sclerosis (RRMS): Analyses From the CONFIRM Study (S41.005). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s41.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Liu S, Yao K, Jia D, Zhao N, Lai W, Yuan H. A Pretreatment Method for HPLC Analysis of Cypermethrin in Microbial Degradation Systems. J Chromatogr Sci 2012; 50:469-76. [DOI: 10.1093/chromsci/bms030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Jiang B, Liu F, Yang L, Zhang W, Yuan H, Wang J, Huang G. Serum detection of epidermal growth factor receptor gene mutations using mutant-enriched sequencing in Chinese patients with advanced non-small cell lung cancer. J Int Med Res 2012; 39:1392-401. [PMID: 21986139 DOI: 10.1177/147323001103900425] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Epidermal growth factor receptor gene (EGFR) mutations are among the best predictive markers of the efficacy of EGFR tyrosine kinase inhibitor (EGFR-TKI) treatment. Mutations in the EGFR gene confer sensitivity to EGFR-TKIs in patients with advanced non-small cell lung cancer (NSCLC). This study determined the concordance rate of EGFR mutations in serum samples and tumour tissue from Chinese patients with advanced NSCLC and compared two detection methods: mutant-enriched polymerase chain reaction-based DNA sequencing and non-enriched sequencing. The EGFR mutation status in serum was consistent with that in paired tumour samples, with a concordance rate of 93.1% for mutant-enriched sequencing. In serum samples, mutant-enriched sequencing demonstrated sensitivity and specificity of 77.8% and 100%, respectively, and was more sensitive than the non-enriched assay. Mutant-enriched sequencing in serum may provide a non-invasive and sensitive method for detecting EGFR mutation status in patients with unresectable NSCLC.
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Shao B, Liu L, Yang F, Shan D, Yuan H. Membrane Modification Using Polydopamine and/or PDA Coated TiO2 Nano Particles for Wastewater Treatment. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proeng.2012.08.815] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yuan H, Niu YM, Wang RX, Li HZ, Chen N. Association between XPD Lys751Gln polymorphism and risk of head and neck cancer: a meta-analysis. GENETICS AND MOLECULAR RESEARCH 2011; 10:3356-64. [PMID: 22179996 DOI: 10.4238/2011.november.22.6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Several studies have investigated the association between Lys751Gln polymorphism in the xeroderma pigmentosum group D (XPD) gene and risk of head and neck cancer; however, the published results are conflicting. We conducted a meta-analysis that comprised 15 published case-control studies examining the association of head and neck cancer risk with XPD Lys751Gln polymorphism in different populations, based on the data identified in Medline up to November 2010. Odds ratios (ORs) with 95% confidence intervals (CI) were used to assess the strength of the association. Overall, significantly elevated head and neck cancer risk was associated with XPD Lys751Gln polymorphism when all studies were pooled into the meta-analysis [(Gln/Gln + Lys/Gln) vs Lys/Lys: OR = 1.12, 95%CI = 1.03-1.22, P < 0.01, heterogeneity P = 0.11]. In the subgroup analysis by ethnicity, borderline significantly increased risk was found for Europeans [(Gln/Gln + Lys/Gln) vs Lys/Lys: OR = 1.11, 95%CI = 1.00-1.23, P < 0.05]. In conclusion, our meta-analysis demonstrated that XPD Lys751Gln polymorphism could be a prediction marker for risk of head and neck cancer.
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Beisswenger PJ, Brown WV, Ceriello A, Le NA, Goldberg RB, Cooke JP, Robbins DC, Sarwat S, Yuan H, Jones CA, Tan MH. Meal-induced increases in C-reactive protein, interleukin-6 and tumour necrosis factor α are attenuated by prandial + basal insulin in patients with Type 2 diabetes. Diabet Med 2011; 28:1088-95. [PMID: 21517955 PMCID: PMC3178784 DOI: 10.1111/j.1464-5491.2011.03324.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/18/2011] [Indexed: 01/04/2023]
Abstract
AIM To determine if a regimen with prandial + basal insulin compared with basal insulin attenuates post-meal inflammatory and glycative biomarkers in patients with Type 2 diabetes. METHODS This test-meal sub-study in the USA is from a previously reported clinical trial comparing the effect on glycaemic control of 24 weeks of thrice-daily pre-meal insulin lispro mix 50 (50% insulin lispro, 50% insulin lispro protamine suspension) or bedtime insulin glargine, both plus metformin. In the sub-study, glucose, insulin, triglycerides, high-sensitivity C-reactive protein, tumour necrosis factor α, interleukin-6, methylglyoxal and 3-deoxyglucosone were measured during the post-meal period of a mixed-meal breakfast at the final visit. Prandial + basal (n = 25) and basal (n = 21) insulin were administered at the same times as during the previous 24 weeks. RESULTS Post-meal, the prandial + basal insulin group had significantly higher insulin, lower glucose and triglycerides, as well as lower high-sensitivity C-reactive protein, tumour necrosis factor α and interleukin-6, than the basal insulin group. Glucose incremental area under the concentration curve significantly correlated with high-sensitivity C-reactive protein, tumour necrosis factor α, interleukin-6, methylglyoxal and 3-deoxyglucosone incremental area under the concentration curve. Insulin incremental area under the concentration curve correlated inversely with high-sensitivity C-reactive protein and tumour necrosis factor α incremental area under the concentration curve. However, after adjusting for glucose incremental area under the concentration curve, these inverse correlations were no longer significant. Triglyceride incremental area under the concentration curve was not correlated with any biomarker incremental area under the concentration curve. CONCLUSIONS Controlling post-meal hyperglycaemia with prandial + basal insulin in patients with Type 2 diabetes attenuates meal-induced increases in high-sensitivity C-reactive protein, interleukin-6 and tumour necrosis factor α compared with basal insulin. The rise in post-meal glucose, but not triglycerides, significantly correlated with the rise in post-meal inflammatory and glycative biomarkers.
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Chen S, Yuan H, Grinberg N, Dovletoglou A, Bicker G. Enantiomeric Separation of trans‐2‐Aminocyclohexanol on a Crown Ether Stationary Phase Using Evaporative Light Scattering Detection. J LIQ CHROMATOGR R T 2011. [DOI: 10.1081/jlc-120017180] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Astolfi L, De Vico Fallani F, Toppi J, Cincotti F, Mattia D, Salinari S, Vecchiato G, Wilke C, Yuan H, He B, Babiloni F. S2.3 Neural basis of cooperation and defection during social interaction: a neuroelectrical hyperscanning study. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60010-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Widlowski JL, Pinty B, Clerici M, Dai Y, De Kauwe M, de Ridder K, Kallel A, Kobayashi H, Lavergne T, Ni-Meister W, Olchev A, Quaife T, Wang S, Yang W, Yang Y, Yuan H. RAMI4PILPS: An intercomparison of formulations for the partitioning of solar radiation in land surface models. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jg001511] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Astolfi L, Cincotti F, Mattia D, De Vico Fallani F, Salinari S, Vecchiato G, Toppi J, Wilke C, Doud A, Yuan H, He B, Babiloni F. Imaging the social brain: multi-subjects EEG recordings during the "Chicken's game". ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2010:1734-7. [PMID: 21096409 DOI: 10.1109/iembs.2010.5626708] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this study we measured simultaneously by EEG hyperscannings the neuroelectric activity in 6 couples of subjects during the performance of the "Chicken's game", derived from game theory. The simultaneous recording of the EEG in couples of interacting subjects allows to observe and model directly the neural signature of human interactions in order to understand the cerebral processes generating and generated by social cooperation or competition. Results suggested that the one of the most consistently activated structure in this particular social interaction paradigm is the left orbitofrontal cortex. Connectivity results also showed a significant involvement of the orbitofrontal regions of both hemispheres across the observed population. Taken together, results confirms that the study of the brain activities in humans during social interactions can take benefit from the simultaneous acquisition of brain activity during such interaction.
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Astolfi L, Cincotti F, Mattia D, De Vico Fallani F, Salinari S, Vecchiato G, Toppi J, Wilke C, Doud A, Yuan H, He B, Babiloni F. Simultaneous estimation of cortical activity during social interactions by using EEG hyperscannings. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2010:2814-7. [PMID: 21096219 DOI: 10.1109/iembs.2010.5626555] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In this paper we show how the possibility of recording simultaneously the cerebral neuroelectric activity in different subjects (EEG hyperscanning) during the execution of different tasks could return useful information about the "internal" cerebral state of the subjects. We present the results obtained by EEG hyperscannings during ecological task (such as the execution of a card game) as well as that obtained in a series of couples of subjects during the performance of the Prisoner's Dilemma Game. The simultaneous recordings of couples of interacting subjects allows to observe and to model directly the neural signature of human interactions in order to understand the cerebral processes generating and generated by social cooperation or competition. Results obtained in a study of different groups recorded during the card game revealed a larger activity in prefrontal and anterior cingulated cortex in different frequency bands for the player that leads the game when compared to other players. Results collected in a population of 10 subjects during the performance of the Prisoner's Dilemma suggested that the most consistently activated structure is the orbitofrontal region (roughly described by the Brodmann area 10) during the condition of competition in both the tasks. It could be speculated whether the pattern of cortical connectivity between different cortical areas in different subjects could be employed as a tool for assessing the outcome of the task in advance.
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Donkena KV, Yuan H, Young CYF. Vitamin Bs, one carbon metabolism and prostate cancer. Mini Rev Med Chem 2011; 10:1385-92. [PMID: 20937030 DOI: 10.2174/138955710793564106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Accepted: 08/28/2010] [Indexed: 12/17/2022]
Abstract
Somatic genetic and epigenetic alterations have been suggested to be crucially involved in development and progression of cancers including prostate cancer (PCa). Epigenetic alterations such as chemical modification of chromatin associated proteins and DNA methylation can largely affect gene expression that may be important for early normal organ development, and also produces favorable conditions for cancer cell formation, growth, and survival. Aberrant DNA methylation (hyper- or hypo-methylation) may lead to chromosomal instability, and transcriptional gene silencing for tumor suppressors or overexpression for oncogenes. Vitamin Bs play important roles in one carbon metabolism that provides critical metabolites for DNA methylation, DNA repair and nucleic acid synthesis. Nutrition uptake and circulating levels of these vitamin Bs as well as genetic polymorphisms of related key enzymes in the one carbon metabolism pathway may govern bioavailability of the metabolites, and therefore to affect the phenotypic changes (e.g., cellular malignancy) via genetic and epigenetic alterations. This article will summarize recent new findings from laboratory, epidemiological or clinical trial studies regarding influence of vitamin B and one carbon metabolism on PCa development or progression.
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Bowley CC, Fontecchio AK, Lin JJ, Yuan H, Crawford GP. Advances in Holographic Polymer Dispersed Liquid Crystal Technology. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-559-97] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe discuss recent advances in reflective holographically-formed polymer dispersed liquid crystal materials in the context of their suitability for reflective display applications. A dual-domain phenomenon resulting in a broadened reflection peak is presented. A simple phenomenological model is developed to explain this unusual effect The effect of monomer functionality on the reflectance characteristics of these materials is also discussed. Monomers of effective functionality ∼4.5 yield the brightest holograms, however, the data suggests that these systems are currently far from optimal.
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Wang Y, Xu Y, Li J, Wei Y, Zhao D, Hou L, Hasimu B, Yang J, Yuan H, Hu D. Characteristics of prevalence in peripheral arterial disease and correlative risk factors and comorbidities among female natural population in China. VASA 2010; 39:305-11. [PMID: 21104619 DOI: 10.1024/0301-1526/a000054] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND To investigate the prevalence of peripheral arterial disease (PAD) and correlating risk factors and comorbidities in a natural female population in China, and to study the characteristics of atherosclerotic disease in females. PATIENTS AND METHODS Natural population from communities in several cities and districts including Beijing, Shanghai, Changsha, Guangdong, Inner Mongolia, and Xinjiang in China were investigated as study subjects through cluster multistage and random sampling. Ankle-brachial index (ABI) was measured among participants in the communities by trained investigators and correlative information and clinical data were collected. PAD was defined as an ABI≤0.9 in either leg. RESULTS 21,152 eligible participants were included in the survey. The prevalence in males and females was 2.52 % and 3.66 %, the standardized prevalence was 1.84% and 4.31% respectively, and the prevalence in females was higher than that in males (p<0.01). The prevalence in females obviously increased (p<0.01) with increasing age. More female participants with PAD were over 69 years old compared with those without PAD (18.8% vs. 10.0%, p=0.000) and more frequently have a smoking habit (11.1% vs. 2.5%, p=0.000), lipid disorders (34.8% vs. 29.2%, p=0.047), diabetes mellitus (14.8% vs. 8.6%, p=0.000), coronary heart disease (16.9% vs. 10.0%, p=0.000) and a history of stroke (6.8% vs. 2.3%, p=0.000). Using multiple logistic regression analysis, older age (>69 years old, OR: 1.60, 95% CI: 1.11-2.29), a smoking habit (OR: 5.98, 95% CI: 3.88-9.21), comorbidities of lipid disorders (OR: 1.45, 95% CI: 1.10-1.91), diabetes mellitus (OR: 1.46, 95% CI: 1.02-2.11), coronary heart disease (OR: 1.50, 95% CI: 1.02-2.19)and a history of stroke (OR: 1.71, 95% CI: 1.01-2.91) were correlated with the prevalence of PAD in females in China. Only 0.8% of female patients with PAD had been diagnosed previously. CONCLUSIONS The data suggest that the prevalence of PAD in a female natural population in China is higher than that in males. Many conventional risk factors and comorbidities were correlated with the high prevalence of PAD in females. But only very few female patients with PAD were diagnosed. Thus, more measures should be taken to diagnose, prevent and control PAD in females in China.
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Astolfi L, De Vico Fallani F, Cincotti F, Mattia D, Vecchiato G, Toppi J, Salinari S, Wilke C, Yuan H, He B, Babiloni F. P10-13 Study of the cortical activity from simultaneous multi-subject EEG recordings. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60666-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Li Y, Yuan H, Yang K, Xu W, Tang W, Li X. The structure and functions of P-glycoprotein. Curr Med Chem 2010; 17:786-800. [PMID: 20088754 DOI: 10.2174/092986710790514507] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2009] [Accepted: 01/13/2010] [Indexed: 11/22/2022]
Abstract
P-glycoprotein (P-gp) is an ATP-driven transmembrane transporter capable of effluxing a wide variety of structurally diverse and functionally unrelated hydrophobic compounds out of the cell. Multidrug resistance (MDR), often associated with the over-expression of P-gp, has been implicated as a major obstacle to effective chemotherapy for cancer, parasitic diseases, AIDS, and other diseases. Drug efflux mediated by P-gp is also involved in decreasing the oral bioavailability of drugs by limiting intestinal absorption. Our appreciation of the structural and functional aspects of P-gp has definitely improved in recent years, benefiting from the deciphering of the structure of some bacterial transporters that paved the way for construction of homology models for more complex transporters. Here, we will review the recent advances in the studies of the structure and functional characteristics of P-gp with the hopes of facilitating rational drug design in developing novel potent MDR modulators.
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Barbieri D, Renard AJS, de Bruijn JD, Yuan H. Heterotopic bone formation by nano-apatite containing poly(D,L-lactide) composites. Eur Cell Mater 2010; 19:252-61. [PMID: 20526989 DOI: 10.22203/ecm.v019a24] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
To render polymeric materials osteoinductive, nano-sized calcium phosphate apatite particles (CaP) were introduced into a low molecular weight poly(D,L-lactide). Homogenous composites were made with 10%, 20% and 40% by weight of apatite content while pure polylactide was used as control. Thereafter porous samples (pore size 300-400 microm, 60% porosity) were fabricated and sterilized. In vitro studies showed that calcium ions were released from the composites depending on the apatite content, while surface mineral deposition was observed only on the 40% CaP composites in simulated body fluid (SBF) within 14 days. After 12 weeks of intramuscular implantation in dogs, only the 40% CaP composite implant retained its shape and showed ectopic bone formation within the pores. In conclusion, adding a content of 40% apatite into poly(D,L-lactide) could lead to an osteoinductive material. Future studies will focus on understanding this phenomenon of material-directed osteoinduction in order to develop a promising bone graft substitute.
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Donkena K, Yuan H, Young C. Recent Advances in Understanding Hormonal Therapy Resistant Prostate Cancer. Curr Cancer Drug Targets 2010; 10:402-10. [DOI: 10.2174/156800910791208544] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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176
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Yuan H, Xu S, Wang Y, Xu H, Wang C, Zhu Q, Yang RK, Chen X, Yang PC, Shi X. Corticotrophin-releasing hormone (CRH) facilitates axon outgrowth. Spinal Cord 2010; 48:850-6. [PMID: 20458328 DOI: 10.1038/sc.2010.47] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To evaluate the role of corticotrophin-releasing hormone (CRH) in facilitating axon outgrowth. BACKGROUND Injured neural tissue is difficult to regenerate; the mechanism has not been fully understood. METHODS A rat model of spinal cord transection injury was developed. Levels of BDNF, CRH and oligodendrocyte glycoprotein (OMgp) in injured spinal cord were monitored dynamically after surgery. Cellular interaction among rat dorsal root ganglia (DRG) cells, oligocondrocytes and microglial cells was observed with a coculture model. The axon outgrowth from DRG cells was examined by confocal microscopy. RESULTS After spinal cord transection, levels of BDNF and CRH increased the next day and decreased afterward, whereas OMgp levels increased from day 3. Administration with BDNF suppressed the levels of OMgp in vitro. The results from a coculture model showed that CRH increased microglial cells to release BDNF; BDNF inhibited OMgp levels in oligodendrocytes and enhanced the axon outgrowth from DRG cells. CONCLUSIONS This study shows that CRH has the ability to facilitate the outgrowth of axon in spinal neurons, which has therapeutic potential in the treatment of spinal cord injury.
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Astolfi L, Cincotti F, Mattia D, De Vico Fallani F, Salinari S, Marciani MG, Wilke C, Doud A, Yuan H, He B, Babiloni F. Estimation of the cortical activity from simultaneous multi-subject recordings during the prisoner's dilemma. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2010; 2009:1937-9. [PMID: 19964016 DOI: 10.1109/iembs.2009.5333456] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
One of the most challenging questions open in Neuroscience today is the characterization of the brain responses during social interaction. A major limitation of the approaches used in most of the studies performed so far is that only one of the participating brains is measured each time. The "interaction" between cooperating, competing or communicating brains is thus not measured directly, but inferred by independent observations aggregated by cognitive models and assumptions that link behavior and neural activation. In this paper, we present the results of the simultaneous neuroelectric recording of 5 couples of subjects engaged in cooperative games (EEG hyperscanning). The simultaneous recordings of couples of interacting subjects allows to observe and model directly the neural signature of human interactions in order to understand the cerebral processes generating and generated by social cooperation or competition. We used a paradigm called Prisoner's dilemma derived from the game theory. Results collected in a population of 10 subjects suggested that the most consistently activated structure in social interaction paradigms is the orbitofrontal region (roughly described by the Brodmann area 10) during the condition of competition.
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Li LH, Yuan H, Pan HF, Li WX, Li XP, Ye DQ. Role of the Fcγ receptor IIIA-V/F158 polymorphism in susceptibility to systemic lupus erythematosus and lupus nephritis: a meta-analysis. Scand J Rheumatol 2010; 39:148-54. [DOI: 10.3109/03009740903292304] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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179
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Zheng YJ, Hawk M, Yuan H, Hope HR, Baratta M, Zutshi A. Pharmacokinetics and anti-inflammatory pharmacodynamics of prednisolone in cynomolgus monkey. Xenobiotica 2009; 39:862-70. [PMID: 19845437 DOI: 10.3109/00498250903189454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The purpose was to investigate whether the pharmacokinetics and pharmacodynamics of prednisolone in the non-human primate was an appropriate surrogate for man. After single intravenous doses of 0.03, 0.3, and 3 mg kg(-1), prednisolone demonstrated a dose-dependent clearance and volume of distribution. When corrected for concentration-dependent protein binding, the free clearance was linear at the tested dose levels. The protein binding-corrected volume of distribution was similar across doses. The serum half-life was estimated as being between 2 and 4 h. Prednisolone exhibits near complete inhibition of the cytokines TNF-alpha, IL-1beta, IL-6 and IL-8 with very similar IC50 estimates from 0.09 to 0.16 microg ml(-1) (from 0.24 to 0.44 microM). The monkey demonstrated a similar pharmacokinetics-pharmacodynamics profile of prednisolone when compared with man (from the literature).
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Zheng Y, Hawk M, Yuan H, Hope H, Baratta M, Zutshi A. Pharmacokinetics and anti-inflammatory pharmacodynamics of prednisolone in cynomolgus monkey. Xenobiotica 2009. [DOI: 10.1080/00498250903189454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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181
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Hu X, Wu H, Zhang S, Yuan H, Cao L. Clinical Significance of Telomerase Activity in Gastric Carcinoma and Peritoneal Dissemination. J Int Med Res 2009; 37:1127-38. [PMID: 19761695 DOI: 10.1177/147323000903700417] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Telomerase activity is responsible for telomere maintenance and is believed to be crucial in most cancer cells, but its significance in gastric cancer remains unknown. This observational study investigated whether there is a relationship between telomerase activity and the development of gastric cancer, and between telomerase activity and peritoneal dissemination. Telomerase activity was measured in primary gastric cancers and in peritoneal washings from the same patients, and findings were compared with those of conventional cytology and an immunoassay for cancer antigen 125 (CA125). Positive cytological examination and telomerase activity in peritoneal washings both correlated with the histological grade, depth of tumour invasion, area of serosal invasion and peritoneal metastasis. The detection of free cancer cells in peritoneal washings by the telomeric repeat amplification protocol/enzyme-linked immunosorbent assay (TRAP–ELISA) was significantly more sensitive than cytology or the CA125 immunoassay, suggesting that this could be used to diagnose early peritoneal dissemination.
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Wang X, Lin Y, Shen G, Zhang S, Cai M, Yuan H, Yu H, Wang C. Navigation surgery for fibrous dysplasia in the craniomaxillofacial regions. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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183
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Wang X, Lin Y, Shen G, Zhang S, Cai M, Yuan H, Yu H, Wang C. Precise temporomandibular joint glenoid fossa reconstruction by self-developed navigation system. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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184
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Yuan H, Liu F, Xiao B, He Y, Liang Y, Liu J. Mutation screening of entirekeratin 5andkeratin 14genes and identification of a novel mutation in a Chinese family with epidermolysis bullosa simplex Dowling-Meara. J Eur Acad Dermatol Venereol 2008; 22:1510-2. [DOI: 10.1111/j.1468-3083.2008.02687.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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185
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Yuan H, Huang Z, Yang G, Lv H, Sang H, Yao Y. Effects of Polymorphism of the β1 Adrenoreceptor and CYP2D6 on the Therapeutic Effects of Metoprolol. J Int Med Res 2008; 36:1354-62. [PMID: 19094446 DOI: 10.1177/147323000803600624] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Metoprolol is a lipophilic β1 selective adrenergic receptor antagonist used in antihypertensive therapy. It is metabolized by the protein product of the cytochrome P450 2D6 ( CYP2D6) gene. Few studies have been performed on the association between the β1 adrenoreceptor, CYP2D6 polymorphism and blood pressure. The one reported here is a prospective, observational, clinical study in Chinese Han hypertensive patients on the combined influences of CYP2D6 and β1 adrenoreceptor polymorphisms on the therapeutic effects of metoprolol in 300 out-patients with essential hypertension. The same dose of metoprolol achieved different therapeutic effects in patients with different CYP2D6 and β1 adrenoreceptor polymorphisms. Additionally, different doses of metoprolol could achieve the same therapeutic effects in patients with different CYP2D6 and β1 adrenoreceptor polymorphisms. Knowledge of the combination of CYP2D6 and β1 adrenoreceptor polymorphisms may be used to guide antihypertensive therapy using β1 adrenoreceptor antagonists.
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186
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Fu H, Yang L, Yuan H, Rao P, Lo Y. Assessment of Trans Fatty Acids Content in Popular Western-Style Products in China. J Food Sci 2008; 73:S383-91. [DOI: 10.1111/j.1750-3841.2008.00907.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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187
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Chen X, Zhou Z, Yuan H, Meng Z. Preparation and Chiral Recognition of a Mono[6A-N-1-(2-hydroxy)-phenylethylimino-6A-deoxy]- -Cyclodextrin HPLC Stationary Phase. J Chromatogr Sci 2008; 46:777-82. [DOI: 10.1093/chromsci/46.9.777] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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188
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Feng S, Zhang G, Yuan H, Yang M, Chen Y, Zhang S. Perovskite-type LnFeO 3(Ln= Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho ) prepared by mild hydrothermal method. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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189
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Liu >X, Angeli S, Ouyang X, Liu W, Ke X, Liu Y, Liu S, Du L, Deng X, Yuan H, Yan D. Audiological and genetic features of the mtDNA mutations. Acta Otolaryngol 2008; 128:732-8. [PMID: 18568513 DOI: 10.1080/00016480701719011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
CONCLUSIONS Significant difference in the incidence of mitochondrial DNA (mtDNA) mutations was found between the Chinese and USA populations. The identification of the mtDNA A1555G mutation in a large proportion of Chinese probands with nonsyndromic sensorineural hearing loss (NSHL) provides a molecular explanation for the high prevalence of aminoglycoside-induced deafness in China. OBJECTIVE The aim was to characterize the audiological and genetic features of NSHL due to mutations in mtDNA. SUBJECTS AND METHODS The mtDNA and audiogram analyses were performed in 498 NSHL patients (290 from China and 208 from the USA) with and without history of aminoglycoside exposure. A PCR and restriction enzyme digestion protocol was used for mutational screening and the European Workshop on Genetic Hearing Loss criteria were applied for audiological classification. RESULTS All Chinese probands (15.5%) with mtDNA mutation were found to carry the homoplasmic mtDNA A1555G mutation, whereas four probands (1.9%) from the USA were found to carry the mtDNA A1555G and two (1%) had mtDNA G7444A. Approximately 63% of the probands with mtDNA mutations had post-lingual hearing loss and 56.8% of them had a medical history of exposure to aminoglycosides. Hearing losses are bilateral, sensorineural, and symmetric. The main audiogram shapes found were sloping.
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Yuan H, Wong L, Bhattacharya M, Ma C, Sielaff R, Zafarani M, Martins-Green M. 157
Changes in the Levels of Adiponectin and MCP-1 may be Responsible for Cigarette Smoke-Induced Atherosclerosis. Wound Repair Regen 2008. [DOI: 10.1111/j.1067-1927.2005.130216bi.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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191
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Wong L, Sielaff R, Yuan H, Bhattacharya M, Zafarani M, Martins-Green M. 016
Dissecting the Effects of Cigarette Smoke Components on Delay of Wound Healing. Wound Repair Regen 2008. [DOI: 10.1111/j.1067-1927.2005.130215p.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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192
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Dai N, Cong Y, Yuan H. Prevalence of irritable bowel syndrome among undergraduates in Southeast China. Dig Liver Dis 2008; 40:418-24. [PMID: 18339591 DOI: 10.1016/j.dld.2008.01.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2007] [Revised: 01/10/2008] [Accepted: 01/29/2008] [Indexed: 01/06/2023]
Abstract
BACKGROUND There is a wide range in reported prevalence of irritable bowel syndrome worldwide. From the data appeared recently in medical literatures in China, it seems that the incidence of irritable bowel syndrome in young adults is not dissimilar to the one in the Western countries. AIMS To explore the prevalence and epidemiological variations of irritable bowel syndrome in an undergraduate student population in Southeast China on the basis of the Rome II and Rome III criteria. METHODS All the undergraduate student participants were administered self-report diagnostic measures for irritable bowel syndrome. RESULTS The sex-adjusted prevalence rate of irritable bowel syndrome was 4.7% (Rome II) and 10.4% (Rome III), respectively. When we combined irritable bowel syndrome mixed and irritable bowel syndrome unsubtyped in the Rome III subgroups into one group considering the counterpart in the Rome II subgroups was alternative irritable bowel syndrome, the agreement between the two ways to subdivide these 54 patients who were identified with irritable bowel syndrome by both the two criteria was 81%, with a kappa value of 0.67. By the Rome III criteria, we found a female predominance which was especially attributed to the subtypes of irritable bowel syndrome with constipation and unsubtyped. CONCLUSIONS Our study suggests that, in young adults in Southeast China, changing diagnostic criteria for irritable bowel syndrome from Rome II to Rome III may affect women more than men on not only the overall prevalence rate but also the sex-difference present or not, especially in irritable bowel syndrome with constipation and irritable bowel syndrome unsubtyped subgroups.
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193
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Sheikholeslami C, Yuan H, He EJ, Bai X, Yang L, He B. A high resolution EEG study of dynamic brain activity during video game play. ACTA ACUST UNITED AC 2008; 2007:2489-91. [PMID: 18002499 DOI: 10.1109/iembs.2007.4352833] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A high resolution EEG study was conducted on healthy human subjects during video game play. Throughout the game playing experiment short time segments of spontaneous activity were recorded. Spectral analysis was performed on these segments for the theta-wave (4-8 Hz) and alpha-wave (8-13 Hz) bands to investigate the modulatory effects of long-lasting game play and the dynamic changes of spectral contribution in range of alpha-and theta-wave. The present results revealed that a) the frontal midline theta-wave activity increased over time relative to the eye open resting condition and b) the parietal alpha-wave activity initially decreased relative to the resting condition, then followed by a slow increase. These experimental results indicate the high resolution EEG provides a useful quantitative analysis tool for studying dynamic brain activity.
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Wang QJ, Zhao YL, Rao SQ, Guo YF, Yuan H, Zong L, Guan J, Xu BC, Wang DY, Han MK, Lan L, Zhai SQ, Shen Y. A distinct spectrum of SLC26A4 mutations in patients with enlarged vestibular aqueduct in China. Clin Genet 2007; 72:245-54. [PMID: 17718863 DOI: 10.1111/j.1399-0004.2007.00862.x] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
There is a worldwide interest in studying SLC26A4 mutations that are responsible for enlarged vestibular aqueduct (EVA) in different ethnic background and populations. The spectrum of SLC26A4 mutations in Chinese population is yet to be fully characterized. In this study, all the 21 exons of SLC26A4 were screened in 107 Chinese patients with hearing loss associated with EVA or both EVA and Mondini dysplasia (MD), taken from six multiplex and 95 simplex families. The two types of control populations consisted of 84 normal-hearing subjects and 46 sensorineural hearing loss subjects without inner ear malformations. Biallelic mutations were found in 12 patients from multiplex families and 84 patients (88.4%) from the simplex families. In addition, monoallelic variant was detected in nine patients in the remaining 11 simplex families. Overall, up to 97.9% patients were found having at least one possible pathogenic variant in SLC26A4, with most having biallelic variants consistent with recessive inheritance of this disorder. A total of 40 mutations including 25 novel mutations were identified in the Chinese patients but were not detected in all the controls except for one normal subject. For the Chinese mutation spectrum of SLC26A4 gene, IVS 7-2A>G mutation was the most common form accounting for 57.63% (102/177) of all the mutant alleles.
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Zhou W, Yuan H, Wang J, Yao J. Production, purification and characterization of chitosanase produced by Gongronella sp. JG. Lett Appl Microbiol 2007; 46:49-54. [DOI: 10.1111/j.1472-765x.2007.02262.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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196
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Chavagnac V, Milton JA, Green DRH, Breuer J, Bruguier O, Jacob DE, Jong T, Kamenov GD, Le Huray J, Liu Y, Palmer MR, Pourtalès S, Roduhskin I, Soldati A, Trueman CN, Yuan H. Towards the development of a fossil bone geochemical standard: An inter-laboratory study. Anal Chim Acta 2007; 599:177-90. [PMID: 17870280 DOI: 10.1016/j.aca.2007.08.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Revised: 08/06/2007] [Accepted: 08/10/2007] [Indexed: 11/26/2022]
Abstract
Ten international laboratories participated in an inter-laboratory comparison of a fossil bone composite with the objective of producing a matrix and structure-matched reference material for studies of the bio-mineralization of ancient fossil bone. We report the major and trace element compositions of the fossil bone composite, using in-situ method as well as various wet chemical digestion techniques. For major element concentrations, the intra-laboratory analytical precision (%RSD(r)) ranges from 7 to 18%, with higher percentages for Ti and K. The %RSD(r) are smaller than the inter-laboratory analytical precision (%RSD(R); <15-30%). Trace element concentrations vary by approximately 5 orders of magnitude (0.1 mg kg(-1) for Th to 10,000 mg kg(-1) for Ba). The intra-laboratory analytical precision %RSD(r) varies between 8 and 45%. The reproducibility values (%RSD(R)) range from 13 to <50%, although extreme value >100% was found for the high field strength elements (Hf, Th, Zr, Nb). The rare earth element (REE) concentrations, which vary over 3 orders of magnitude, have %RSD(r) and %RSD(R) values at 8-15% and 20-32%, respectively. However, the REE patterns (which are very important for paleo-environmental, taphonomic and paleo-oceanographic analyses) are much more consistent. These data suggest that the complex and unpredictable nature of the mineralogical and chemical composition of fossil bone makes it difficult to set-up and calibrate analytical instruments using conventional standards, and may result in non-spectral matrix effects. We propose an analytical protocol that can be employed in future inter-laboratory studies to produce a certified fossil bone geochemical standard.
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Eniwumide JO, Yuan H, Cartmell SH, Meijer GJ, de Bruijn JD. Ectopic bone formation in bone marrow stem cell seeded calcium phosphate scaffolds as compared to autograft and (cell seeded) allograft. Eur Cell Mater 2007; 14:30-8; discussion 39. [PMID: 17674330 DOI: 10.22203/ecm.v014a03] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Improvements to current therapeutic strategies are needed for the treatment of skeletal defects. Bone tissue engineering offers potential advantages to these strategies. In this study, ectopic bone formation in a range of scaffolds was assessed. Vital autograft and devitalised allograft served as controls and the experimental groups comprised autologous bone marrow derived stem cell seeded allograft, biphasic calcium phosphate (BCP) and tricalcium phosphate (TCP), respectively. All implants were implanted in the back muscle of adult Dutch milk goats for 12 weeks. Micro-computed tomography (microCT) analysis and histomorphometry was performed to evaluate and quantify ectopic bone formation. In good agreement, both microCT and histomorphometric analysis demonstrated a significant increase in bone formation by cell-seeded calcium phosphate scaffolds as compared to the autograft, allograft and cell-seeded allograft implants. An extensive resorption of the autograft, allograft and cell-seeded allograft implants was observed by histology and confirmed by histomorphometry. Cell-seeded TCP implants also showed distinct signs of degradation with histomorphometry and microCT , while the degradation of the cell-seeded BCP implants was negligible. These results indicate that cell-seeded calcium phosphate scaffolds are superior to autograft, allograft or cell-seeded allograft in terms of bone formation at ectopic implantation sites. In addition, the usefulness of microCT for the efficient and non-destructive analysis of mineralised bone and calcium phosphate scaffold was demonstrated.
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Zhou Q, Ruan Z, Yuan H, Jiang B, Xu D. RP-HPLC analysis of flucloxacillin in human plasma: validation and application to a bioequivalence study. DIE PHARMAZIE 2007; 62:101-4. [PMID: 17341027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
A RP-HPLC method with rapid sample processing was developed for quantitation of flucloxacillin in human plasma using dicloxacillin as the internal standard. The plasma sample (100 microL) was acidified with glacial acetic acid, and deproteinized by precipitation with acetonitrile. The supernatant was directly injected into the HPLC system. Separation was achieved on an Alltima C18 column (250 mmx4.6 mm I.D., 5 microm), with a mixture of 10 mmol x L(-1) KH2PO4-acetonitrile (64.5:35.5, v/v) as mobile phase. The assay was successfully applied to a randomized, two-period cross-over bioequivalence study in 20 healthy Chinese volunteers following a single oral dose of 250 mg flucloxacillin capsules. A non-compartmental method was used for pharmacokinetic analysis. Compared with data in the literature, flucloxacillin was eliminated more slowly in Chinese than in Caucasians. Cmax, AUC(0-t) and AUC(0-infinity) were tested for bioequivalence after log-transformation of data. No significant difference was found. Tmax was analyzed by Wilcoxon's test and no significant difference was obtained (P > 0.05). Based on these statistical inferences, the two formulations were judged to be bioequivalent and, thus, can be prescribed interchangeably.
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Yuan H, Gerencser AA, Liot G, Lipton SA, Ellisman M, Perkins GA, Bossy-Wetzel E. Mitochondrial fission is an upstream and required event for bax foci formation in response to nitric oxide in cortical neurons. Cell Death Differ 2006; 14:462-71. [PMID: 17053808 DOI: 10.1038/sj.cdd.4402046] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Mitochondrial dysfunction is an underpinning event in many neurodegenerative disorders. Less clear, however, is how mitochondria become injured during neuronal demise. Nitric oxide (NO) evokes rapid mitochondrial fission in cortical neurons. Interestingly, proapoptotic Bax relocates from the cytoplasm into large foci on mitochondrial scission sites in response to nitrosative stress. Antiapoptotic Bcl-xL does not prevent mitochondrial fission despite its ability to block Bax puncta formation on mitochondria and to mitigate neuronal cell death. Mitofusin 1 (Mfn1) or dominant-negative dynamin-related protein 1(K38A) (Drp1(k38A)) inhibits mitochondrial fission and Bax accumulation on mitochondria induced by exposure to an NO donor. Although NO is known to cause a bioenergetic crisis, lowering ATP by glycolytic or mitochondrial inhibitors neither induces mitochondrial fission nor Bax foci formation on mitochondria. Taken together, these data indicate that the mitochondrial fission machinery acts upstream of the Bcl-2 family of proteins in neurons challenged with nitrosative stress.
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Wang QJ, Li QZ, Rao SQ, Lee K, Huang XS, Yang WY, Zhai SQ, Guo WW, Guo YF, Yu N, Zhao YL, Yuan H, Guan J, Leal SM, Han DY, Shen Y. AUNX1, a novel locus responsible for X linked recessive auditory and peripheral neuropathy, maps to Xq23-27.3. J Med Genet 2006; 43:e33. [PMID: 16816020 PMCID: PMC2564562 DOI: 10.1136/jmg.2005.037929] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND We report here the genetic characterisation of a large five generation Chinese family with the phenotypic features of auditory neuropathy and progressive peripheral sensory neuropathy, and the genetic feature of X linked recessive inheritance. Disease onset was at adolescence (at an average age of 13 years for six affected subjects). The degree of hearing impairment varied from mild to severe, with decreased otoacoustic emissions; auditory brainstem responses were lacking from onset. METHODS Two-point and multipoint model based linkage analysis using the MILNK and LINKMAP programs of the FASTLINK software package produced maximum two-point and multipoint LOD scores of 2.41 and 2.41, respectively. RESULTS These findings define a novel X linked auditory neuropathy locus/region (AUNX1, Xq23-q27.3). This region is 42.09 cM long and contains a 28.07 Mb region with flanking markers DXS1220 and DXS8084, according to the Rutgers Combined Linkage-Physical Map, build 35. However, mutation screen of the candidate gene SLC6A14 within the region did not identify the causative genetic determinant for this large Chinese family.
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