Quantitation of UGT1A1 in human liver microsomes using stable isotope-labelled peptides and mass spectrometry based proteomic approaches

1.?UDP-glucuronosyltransferases (UGTs) are a group of drug-metabolizing enzymes that catalyse the conjugation of endogeonous compounds and xenobiotics to yield hydrophilic glucuronides which subsequently undergo excretion. This report describes an approach for the identification and accurate quantitation of human UGT1A1 in complex biological matrices using liquid chromatography/mass spectrometry/mass spectrometry (LC-MS/MS) analysis of protein digests.

2.?A stable isotope-labelled (SIL) peptide of a unique peptide spanning residues 54–69 in exon 1 of the human UGT1A1 protein with the sequence RIYLSADPALVVIEHG was synthesized. The peptide sequence synthesized was in the reverse order of the human peptide with the stable isotope-labels in the amino acid arginine (¹³C₆¹⁵N₄) resulting in an increase in the mass of the SIL peptide of 10 amu, from 1753 to 1763. The SIL peptide was quantitated by injecting increasing concentrations of the peptide into the LC-MS to obtain a standard curve.

3.?The labelled peptide along with precursor ion monitoring was used to quantify the levels of UGT1A1 in commercial recombinant preparations (supersomes) and individual human liver microsomal samples and pooled human liver micrsomes obtained from BD Biosciences.

4.?Glucuronidation activity studies were performed, which demonstrated a positive correlation between enzyme activity levels and the UGT1A1 content in the liver microsomes obtained from individual human donors.     

Sagittal abdominal diameter and waist circumference appear to be equally good as identifiers of cardiometabolic risk

Background and aimsBody mass index (BMI) and waist circumference (WC) are commonly used markers of cardiometabolic risk. However, sagittal abdominal diameter (SAD) has been proposed as a possibly more sensitive marker of intra-abdominal obesity. We investigated differences in how SAD, WC, and BMI were correlated with cardiometabolic risk markers.Methods and resultsThis cross-sectional study investigated anthropometric and metabolic baseline measurements of individuals from six trials. Multiple linear regression and (partial) correlation coefficients were used to investigate associations between SAD, WC, and BMI and cardiometabolic risk markers, including components of the metabolic syndrome as well as insulin resistance, blood lipids, and lowgrade inflammation.In total 1516 mostly overweight or obese individuals were included in the study. SAD was significantly more correlated with TG than WC for all studies, and overall increase in correlation was 0.05 (95% CI (0.02; 0.08). SAD was significantly more correlated with the markers TG and DBP 0.11 (95% CI (0.08, 0.14)) and 0.04 (95% CI (0.006, 0.07), respectively compared to BMI across all or most studies.ConclusionThis study showed that no single anthropometric indicator was consistently more strongly correlated across all markers of cardiometabolic risk. However, SAD was significantly more strongly correlated with TG than WC and significantly more strongly correlated with DBP and TG than BMI.     

Comparative study on main compounds in Ginkgo biloba L. base on mathematical statistics

In this paper, an HPLC-DAD-ELSD method was developed to determine main 20 components of Ginkgo bilobaL. leaves from different ages and sources, including six flavonol glycosides, five terpene lactones and nine organic acids. Using statistics method and establishing relevant mathematics models, the measured data has proceeded correlation analysis, principal component analysis, and regression statistics and the results showed generalityand specific characteristics. We defined p-hydroxybenzoicacid, catechinic, KRcG and ginkgolide A as characteristic indexes representing commonnessand specialityof Ginkgo biloba L. leaf. The four characteristic indexes can reflect the quality of Ginkgo biloba L. leaf, and the internal relations between them are significant.The contents of other compounds could define the quantity relation with characteristic markers. It simplified the approach of quality control, and provided a basis for quality control of Ginkgo biloba L.     

1952～2003年陕西省检出布鲁氏菌特性分析

目的 总结陕西省1952～2003年的布鲁氏菌检出结果，系统分析布鲁氏菌病的流行状况及病原学研究进展。方法 把全省历年布鲁氏菌病检菌资料分为1952～1981、1982～1991和1992～2003年3个阶段进行统计分析。结果 52年来，陕西省从8个地市5种宿主的不同材料中共分离出3种228株布鲁氏菌，其中羊种菌222株，牛种和犬种菌各3株；自人、羊、鹿、犬、牛分离到的菌株数分别为185、24、15、3和1；1991年以前分离的羊种菌为1、2型，而1996年以后则为羊1、3型。对15株羊种菌进行毒力测定，均为强毒株。结论 陕西省是以羊种为主的羊、牛、犬种布鲁氏菌病混合疫区。流行菌株毒力强，有严重的致病性。陕北、关中疫情严重，陕南存在犬种布鲁氏菌病疫源地。发现羊种菌有宿主转移现象。     

慢性重型病毒性肝炎的终末期肝病模型预后分析

目的评估终末期肝病模型（Modelfor End-Stage Liver Disease，MELD）评分系统慢性重型病毒性肝炎患者短期（3个月）预后的预测能力及临床应用价值，并求出作为判断患者3个月内死亡与否的MELD最佳临界值。方法分析我院2003年～2005年收治的391例慢性重型病毒性肝炎患者的临床资料，应用MELD模型公式对每个患者进行评分，观察3月内的死亡率。结果236例在3个月内死亡，病死率为60．6％。MELD分值在小于30、30～40和大于40的患者的病死率分别为38．1％（86／226）、87．6％（106／121）和100％（44／44）。应用该模型预测患者3个月内死亡与否的最佳MELD临界值为28.c-statistic为0．837，敏感性为69．2％，特异性为86．4％。MELD分值与血清胆红素、肌酐、凝血酶原时间呈明显正相关，与预后情况呈显著负相关。结论MELD分值能够作为反映重型肝炎患者病情严重程度的指标，患者短期内（3个月）死亡危险性随MELD分值的增加而上升，MELD模型能较准确预测慢性重型病毒性肝炎患者短期的临床预后。     

农村高中独生女与非独生女个性与心理健康分析

目的 探讨农村高中独生女与非独生女心理健康状况和个性差异,以及心理健康与个性差异之间的关系.方法 采用症状自评量表(SCL-90),测量被试的心理健康水平;采用艾森克人格量表(EPQ)测量被试的个性特征;自编量表调查学生的一般家庭状况.以高一至高三女生为研究对象,对独生女与非独生女两类人群进行对照研究,观察二者个性与心...     

非糜烂性反流病与功能性烧心

罗马Ⅲ标准提出了非糜烂性反流病(NERD)和功能性烧心(FH)的诊断标准,实际上,临床上有时很难区分NERD和FH。NERD和FH是两种发病机制及临床特点不同的异质性疾病,本综述结合目前研究进展,从食管内脏敏感性、食管动力、精神心理因素、与功能性疾病关系、症状特点及治疗效果方面阐述两者特点,并探讨其相互关系。     

媒体引导对中医古籍阅读推广的作用及其启示

由于中医古籍的文本内容、读者群及其阅读能力等因素,古籍文献的阅读推广在高校图书馆文化活动中一直处于“盆地”状态。 以南京中医药大学图书馆读书节的馆藏中医古籍展览活动为例,阐述了媒体引导对中医古籍阅读推广的作用,如启发读者对中医古籍的兴趣、发挥中医古籍中的名人效应、彰显中中医古籍的海外影响力。媒体引导下中医古籍资源的传播和利用效果为图书馆今后转换思路,做好特色文献阅读推广工作提供参考与借鉴。     

地方高校图书馆特色资源建设分析*

本文以广西中医药大学图书馆近几年来建设特色资源库情况为例,分析建库内容、建库层次,指出存在的问题及应对对策,提出深化建库内容、深化层次建设是特色资源建设的发展趋势。     

融水小型猪的实验动物化系列研究概述

融水小型猪的种源来自广西融水县,2012年被引到广东繁育并测定了基础数据,包括种质特性、繁殖性能、生长曲线、血液学指标、血生化指标、脏器系数、染色体分析。参照国家和地方有关实验动物标准,初步建立了融水小型猪微生物与寄生虫、环境与设施、饲料、病理学、遗传学等质量控制标准。融水小型猪能适应当地气候,繁殖良好,自然受孕率为88.3%,妊娠期平均112 d,初产平均胎产仔6.1头,经产平均产仔7.9头。融水小型猪体型小,雌雄成年体重(6月龄)分别为17.21±5.20 kg和16.35±5.23 kg,性情温顺,线粒体DNA分析表明融水小型猪比兰屿猪更为古老。通过标准化的饲养管理与质量控制,具有培育成实验用小型猪的基本条件。