201
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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202
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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203
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- B Jiang
- Department of Nuclear Medicine, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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204
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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205
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Miao H, Zhang J, Yuan H, Li Y, Xu Y, Li H, Yang X, Ling Y. Synthesis and Fungicidal Activities of Nucleoside Compounds Containing Substituted Benzoyl Thiourea. CHINESE J ORG CHEM 2012. [DOI: 10.6023/cjoc1110111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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206
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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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Affiliation(s)
- H Yuan
- Institute of Dental Research, Nanjing Medical University, Nanjing, PR China
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207
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Xiao Y, Yang X, Li B, Yuan H, Wan S, Xu Y, Qin Z. Design, synthesis and antifungal/insecticidal evaluation of novel cinnamide derivatives. Molecules 2011; 16:8945-57. [PMID: 22027951 PMCID: PMC6264240 DOI: 10.3390/molecules16118945] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 10/02/2011] [Accepted: 10/11/2011] [Indexed: 11/29/2022] Open
Abstract
Twenty novel cinnamamide derivatives were designed and synthesized using as lead compound pyrimorph, whose morpholine moiety was replaced by β-phenylethylamine. All the compounds were characterized by their spectroscopic data. The fungicidal and insecticidal activities were also evaluated. The preliminary results showed that all the title compounds had certain fungicidal activities against seven plant pathogens at a concentration of 50 μg/mL, and compounds 11a and 11l showed inhibition ratios of up to 90% against R. solani. Most of the title compounds exhibited moderate nematicidal activities. In general, the morpholine ring may be replaced by other amines and a chlorine atom in the pyridine ring is helpful to fungicidal activity.
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Affiliation(s)
- Yumei Xiao
- College of Science, China Agricultural University, Beijing 100193, China
| | - Xiaoli Yang
- College of Science, China Agricultural University, Beijing 100193, China
| | - Bo Li
- Lab of Insect Toxicology, South China Agricultural University, Guangzhou 510642, China
| | - Huizhu Yuan
- Institute of Plant Protection, Chinese Academ y of Agriculture Science, Beijing 10193, China
| | - Shuqing Wan
- Lab of Insect Toxicology, South China Agricultural University, Guangzhou 510642, China
| | - Yanjun Xu
- College of Science, China Agricultural University, Beijing 100193, China
- Authors to whom correspondence should be addressed; (Z.Q.); (Y.X.); Tel.: +86-10-62732958; Fax: +86-10-62732958
| | - Zhaohai Qin
- College of Science, China Agricultural University, Beijing 100193, China
- Authors to whom correspondence should be addressed; (Z.Q.); (Y.X.); Tel.: +86-10-62732958; Fax: +86-10-62732958
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208
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- P J Beisswenger
- Section of Endocrinology, Diabetes and Metabolism, Dartmouth Medical School and Dartmouth-Hitchcock Medical Center, Hanover, NH, USA
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209
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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] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- S. Chen
- a Analytical Research , Merck Research Laboratories , P. O. Box 2000, Rahway , New Jersey , 07065 , USA
| | - H. Yuan
- a Analytical Research , Merck Research Laboratories , P. O. Box 2000, Rahway , New Jersey , 07065 , USA
| | - N. Grinberg
- a Analytical Research , Merck Research Laboratories , P. O. Box 2000, Rahway , New Jersey , 07065 , USA
| | - A. Dovletoglou
- a Analytical Research , Merck Research Laboratories , P. O. Box 2000, Rahway , New Jersey , 07065 , USA
| | - G. Bicker
- a Analytical Research , Merck Research Laboratories , P. O. Box 2000, Rahway , New Jersey , 07065 , USA
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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211
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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212
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Zhao Q, Li J, Yan X, Yuan H, Qin Z, Fu B. Synthesis and fungicidal activity of 1,3-thiazoline derivatives bearing nitrophenyl group on the 2-position. J Heterocycl Chem 2011. [DOI: 10.1002/jhet.570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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213
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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". Annu Int Conf IEEE Eng Med Biol Soc 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- L Astolfi
- Dep. of Computer Science of the Univ. of Rome "Sapienza", Italy.
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214
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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. Annu Int Conf IEEE Eng Med Biol Soc 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- L Astolfi
- Dep. of Computer Science of the Univ. of Rome "Sapienza", IRCCS "Fondazione Santa Lucia", Italy.
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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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Affiliation(s)
- K V Donkena
- Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA
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216
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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] [What about the content of this article? (0)] [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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217
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- Y Wang
- Department of Cardiology, the Tenth People's Hospital, Heart, Lung and Blood Vessel Center, Tongji University School of Medicine, Shanghai, China
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218
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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219
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Cui L, Sun L, Shao X, Cao Y, Yang D, Li Z, Yuan H. Systemic action of novel neonicotinoid insecticide IPP-10 and its effect on the feeding behaviour of Rhopalosiphum padi on wheat. Pest Manag Sci 2010; 66:779-785. [PMID: 20533381 DOI: 10.1002/ps.1942] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND IPP-10 is a novel neonicotinoid insecticide recently developed in China and has good activity against sucking insects. Studies were carried out to investigate the activity of IPP-10 against Rhopalosiphum padi L. RESULTS The results demonstrated that IPP-10 had both contact and systemic activity, including acropetal and basipetal translocation in wheat vascular bundles. Starved R. padi were allowed to stay on wheat treated with a sublethal dose of IPP-10. The results of studying their feeding behaviour from an electrical penetration graph (EPG) revealed a decrease in total time and bout duration of xylem and phloem ingestion, but the total time and bout duration of phloem salivation were significantly prolonged. The frequency (7.03 +/- 0.49 Hz) of the xylem ingestion waveform produced by aphids on wheat treated with IPP-10 was significantly lower than that of blank control aphids (8.20 +/- 0.30 Hz). Consequently, aphids born on wheat treated with IPP-10 were obviously lighter and less fecund than the control aphids. CONCLUSION These tests indicated that IPP-10 had both contact and systemic activity, with sublethal effects resulting in reduction in R. padi feeding behaviour, growth rate and fecundity.
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Affiliation(s)
- Li Cui
- Key Laboratory of Pesticide Chemistry and Application Technology, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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220
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- Y Li
- Institute of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University, Shandong Province, P.R. China
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221
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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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Affiliation(s)
- D Barbieri
- Xpand Biotechnology BV, 3723 MB Bilthoven, the Netherlands.
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223
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- H Yuan
- Department of Anesthesiology, Changzheng Hospital, The Second Military Medical University, Shanghai, China
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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. Annu Int Conf IEEE Eng Med Biol Soc 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- L Astolfi
- Department of Computer Science of the Univiversity of Rome, Sapienza, Rome, Italy.
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225
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Yan X, Qin W, Sun L, Qi S, Yang D, Qin Z, Yuan H. Study of inhibitory effects and action mechanism of the novel fungicide pyrimorph against Phytophthora capsici. J Agric Food Chem 2010; 58:2720-2725. [PMID: 20000417 DOI: 10.1021/jf902410x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The antifungal activity of the novel fungicide pyrimorph, (E)-3-[(2-chloropyridine-4-y1)-3-(4-tert-butylpheny1)acryloyl]morpholin, against Phytophthora capsici was investigated in vitro. Pyrimorph inhibited different stages in the life cycle of P. capsici including mycelial growth, sporangium production, zoospore release, and cystospore germination with EC(50) values of 1.84, 0.17, 4.92, and 0.09 microg mL(-1), respectively. The effect of pyrimorph on mycelial growth was reduced by the addition of different concentrations of ATP, which suggested that the action mechanism of pyrimorph was connected with impairment of the energy generation system. Meanwhile, pyrimorph exhibited certain inhibition on metabolic approaches of Embden-Meyerhof-Parnas (EMP), tricarboxylic acid cycle (TCA), and hexosemonophosphate (HMP) by measuring the oxygen consumption of pyrimorph combining with three representative inhibitors to the metabolic approaches. The results indicated that pyrimorph could inhibit the approach of HMP significantly. Morphological and ultrastructural studies showed that pyrimorph caused excessive septation and swelling of hyphae, distortion and disruption of most vacuoles, thickening and development a multilayer cell wall, and accumulation of dense bodies. These results suggested pyrimorph exhibited multiple modes of action including impairment of the energy generation system and effect on cell wall biosynthesis directly or indirectly.
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Affiliation(s)
- Xiaojing Yan
- Key Laboratory of Pesticide Chemistry and Application Technology, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, People's Republic of China
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226
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Yan X, Liang X, Jin S, Lv J, Yu C, Qi W, Li B, Yuan H, Qi S, Shi Y, Wu J, Chen F, Wang D. Primary study on mode of action for macrocyclic fungicide candidates (7B3, D1) against Rhizoctonia solani Kuhn. J Agric Food Chem 2010; 58:2726-2729. [PMID: 20050666 DOI: 10.1021/jf9037369] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel macrolactam fungicide candidate (7B3) and a novel aza-macrolactone fungicide candidate (D1) were designed and synthesized, and the bioassay showed that both displayed excellent fungicidal activity against Rhizoctonia solani Kuhn. To elucidate the biochemical mode of action of the two compounds against R. solani and illustrate the similarities and differences of action mechanism resulting from subtle differences in structure of the two compounds, the effects of the two compounds on the ultrastructure of hyphae, electrolyte leakage, and respiration of mycelia cell suspension caused by 7B3 or D1 were studied. The results showed that the two compounds had very similar modes of action. Both induced irregular swelling of hyphae, vacuolation of cytoplasm, and thickening of cell wall. The conductivity of mycelia cell suspension increased in the presence of 7B3 or D1, which indicated that the two compounds had a similar effect on cell membrane permeability. In addition, both 7B3 and D1 were insufficient in inhibiting the respiration of mycelia.
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Affiliation(s)
- Xiaojing Yan
- Key Laboratory of Pesticide Chemistry and Application Technology, Department of Applied Chemistry, China Agricultural University, Beijing 100193, People's Republic of China
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227
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Li B, Yuan H, Fang J, Tao L, Huang Q, Qian X, Fan Z. Recent progress of highly efficient in vivo biological screening for novel agrochemicals in China. Pest Manag Sci 2010; 66:238-247. [PMID: 19937917 DOI: 10.1002/ps.1875] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This paper describes the recent progress of in vivo biological screening for pesticides in China. According to the criteria, including the severity of damage caused by pests and the economic value of the crops, the investigated insects, pathogens, herbs and other species in the agricultural field were selected as the main screening targets for pesticides. Corresponding in vivo microscreening methods have been established and applied in the pesticide screening procedure, which has higher reproducibility, a shorter time and greater efficiency that offset the drawbacks of conventional methods for pesticide screening.
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Affiliation(s)
- Baoju Li
- Agrochemical Biological Screening Group of 973 Project in China
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228
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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229
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- Y J Zheng
- Pfizer Global Research & Development, St. Louis Laboratories, Chesterfield, MO 63017, USA
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230
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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231
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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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Affiliation(s)
- X Hu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - H Wu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - S Zhang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - H Yuan
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - L Cao
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
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232
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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233
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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234
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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235
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- H Yuan
- Centre of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Z Huang
- Centre of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - G Yang
- Centre of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - H Lv
- Centre of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - H Sang
- Centre of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Y Yao
- Centre of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
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236
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237
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Yang G, Zhao Q, Li Y, Yuan H, Mei X, Ning J. SYNTHESIS OF BIVALENT ORGANOPHOSPHORUS COMPOUNDS AS ACETYLCHOLINESTERASE INHIBITORS. ORG PREP PROCED INT 2008. [DOI: 10.1080/00304940809458115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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238
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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239
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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240
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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] [What about the content of this article? (0)] [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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241
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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242
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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243
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- N Dai
- Division of Gastroenterology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, PR China
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244
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- C Sheikholeslami
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
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245
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- Q-J Wang
- Department of Otorhinolaryngology/Head and Neck Surgery, and Institute of Otolaryngology, China People Liberation Army General Hospital, Beijing, China.
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246
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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247
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- V Chavagnac
- National Oceanography Centre Southampton, University of Southampton, European Way, Southampton SO14 3ZH, UK.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- J O Eniwumide
- Department of Materials, Queen Mary University of London, London, UK
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249
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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. Pharmazie 2007; 62:101-4. [PMID: 17341027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- Q Zhou
- Division of Clinical Pharmacology, the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
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250
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Affiliation(s)
- H Yuan
- Apoptosis and Cell Death Program, Burnham Institute for Medical Research, La Jolla, CA 92037, USA
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