广东省原住口腔扁平苔藓患者非刺激全唾液蛋白组学研究

目的:利用双向荧光差异凝胶电泳-质谱分析技术,研究广东省原住口腔扁平苔藓患者非刺激全唾液蛋白丰度变化。方法:选取本院2016年1-12月收治的15例口腔扁平苔藓患者为研究组,15例正常者为对照组,收集两组患者的唾液,提取唾液的总蛋白,通过双向荧光差异凝胶电泳分离蛋白质,荧光扫描寻找差异蛋白质,利用质谱分析技术对差异蛋白质进行分析。结果:SDS-PAGE显示所有样品的蛋白条带清晰,无空缺条带,无明显蛋白丢失现象。经2-D DIGE分离检测,两组唾液蛋白样品的总蛋白整体分布相似,重复性较好,研究组与对照组平均唾液蛋白质点数分别为(1596±207)个和(1603±164)个。质谱分析鉴定两组唾液蛋白存在五个差异比较明显的蛋白质,即分泌性IgA、锌α2糖蛋白、碳酸酐酶6、唾液淀粉酶和血清白蛋白,且研究组唾液蛋白中分泌性IgA表达下调,其余四种差异蛋白均表达上调(P0.01)。结论:分泌性IgA、锌α2糖蛋白、碳酸酐酶6、唾液淀粉酶和血清白蛋白五种差异蛋白,可能与口腔扁平苔藓的发生及发展密切相关,可为今后的药物选择与治疗方案制定提供依据。     

燃煤污染型砷中毒患者血清差异蛋白的筛选

目的 应用血清蛋白组学技术,对比分析燃煤污染型砷中毒患者与正常人血清中差异蛋白的表达,筛选与燃煤污染型砷中毒发生发展密切相关的蛋白质.方法 2008年收集经临床诊断的贵州燃煤污染型砷中毒患者和健康人空腹血清标本各6例,用双向凝胶电泳(2-DE)分离砷中毒患者血清和健康人血清的总蛋白质,银染显色后经图像分析识别差异表达的蛋白质,再应用基质辅助激光解析电离飞行时间质谱(MALDI-TOF-MS)鉴定差异表达的蛋白质点.结果 两组血清2-DE图谱平均点数分别为779±35和865±30,匹配率为90.1%.筛选出两组间的差异蛋白点60个,砷中毒组表达上调25个,表达下调35个.对其中表达量差异3倍以上的35个蛋白点进行MALDI-TOF-MS分析,鉴定出包括角蛋白10、载脂蛋白A-V、转铁蛋白、α1抗胰蛋白酶、锌α2糖蛋白、细胞外信号调节激酶3、空泡分选蛋白33、O-GlcNAc糖基转移酶等13个蛋白质,其中5个蛋白质在砷中毒组表达上调,8个蛋白质在砷中毒组表达下调.结论 本研究建立了分辨率高、重复性较好的燃煤污染型砷中毒患者血清双向凝胶电泳图谱,识别并鉴定了一些与健康人血清差异表达的蛋白质,为进一步探讨地方性砷中毒发病机制,筛选燃煤污染型砷中毒早期特异性血清分子标志物奠定了初步基础.     

多发性肌炎并肺间质病变血清蛋白质组学研究

目的寻找可预测多发性肌炎(PM)及合并肺间质病变(ILD)发生、发展的血清蛋白质。方法收集PM、PM+ILD患者及正常人(对照组)各3例,用双向电泳分离血清蛋白质点。凝胶经考马斯亮兰染色后,采用Analysis 2D7.0软件进行分析,光密度差异(ratio)>2且差别具有统计学意义(P<0.05)的蛋白质点为差异表达蛋白。基质辅助激光解析电离飞行时间质谱进行鉴定;ELISA方法进行验证。结果通过2-DE图谱分析发现,15个差异表达蛋白质点,质谱鉴定出9种蛋白质。与对照组比较,PM组表达上调的蛋白为血清淀粉样蛋白A、载脂蛋白A1、凝集素、血清白蛋白;PM组表达下调的蛋白为转铁蛋白(TRF);PM+ILD组表达下调的蛋白为锌-a2-糖蛋白、TRF、a2-H2-糖蛋白、a1-β-糖蛋白。与PM组比较,PM+ILD组表达下调的蛋白为TRF、β2-糖蛋白1。ELISA进一步验证显示,TRF在各组间表达差别无统计学意义(P>0.05)。结论 PM组、PM+ILD组及对照组3组间存在8种差异表达的蛋白,这些蛋白可能是PM及ILD发病的相关蛋白,参与了疾病的进程。     

应用同位素标记相对和绝对定量技术筛选白厚苔和黄厚苔乳腺癌患者唾液差异表达蛋白

目的：筛选乳腺癌白苔和黄苔患者与健康对照组之间的唾液差异表达蛋白,以寻找乳腺癌早期诊断的生物标记物,探索中医舌苔形成的机制。方法：纳入具有典型的白厚苔或黄厚苔的乳腺癌患者以及薄白苔健康人各10例。采集唾液提取蛋白,然后进行蛋白变性、还原及酶解,最后进行同位素标记相对和绝对定量（isobaric tags forrelative and absolute quantitation,i TRAQ）标记和液相色谱串联质谱联用技术鉴定,得到的峰图用Data Analysis4.0,Mascott2.2软件和Scaffold软件分析,得出表达量差异结果。鉴定蛋白的组间比值〉1.5或〈0.6被认为存在表达差异。结果：共鉴定出464个蛋白,其中达到严格定量标准的蛋白125个。与健康对照组比较,乳腺癌白苔组和黄苔组共筛选出9个唾液差异表达蛋白,乳腺癌白苔组和黄苔组之间筛选出16个差异蛋白。结论：本研究证实i TRAQ结合液相色谱串联质谱联用技术能够快速、有效地进行差异蛋白质组学研究,发现一些蛋白与乳腺癌的发生以及中医舌苔形成机制相关。     

干燥综合征蛋白组学的研究

目的应用SELDI研究干燥综合征疾病的特异性差异蛋白.方法选用CM10芯片,应用表面增强激光解析离子飞行时间质谱技术,比较SS疾病组与正常组血清的蛋白及SS疾病组中关节肿痛组与无关节肿痛组血清的蛋白质表达差异.结果 (1)SS组与正常组的血清中有68个差异质谱峰(P<0.05),并鉴定出11个蛋白在SS组中10个上调表达,1个下调表达;(2)未发现与关节肿痛相关的特异性差异蛋白;(3)将11个差异蛋白分别与临床资料进行分析对比,未发现明显相关性.结论 (1)SS患者与正常人血清中蛋白质的表达有差异;(2)伴关节肿痛症状SS患者无特异性差异蛋白;(3)检测出的α-1抗糜蛋白酶、纤维蛋白原α链、β淀粉样蛋白前体、转甲状腺素蛋白、β2-微球蛋白都可能参与SS的发病,上述物质均可引起淀粉样变,损伤机制可能与淀粉样变相关.     

乙型肝炎病毒相关肝癌血清差异表达蛋白的筛选、鉴定及其诊断价值

目的:筛选、鉴定乙型肝炎病毒(HBV)相关肝癌的血清差异表达蛋白,探讨其可能的早期诊断价值.方法:采用蛋白芯片及表面增强激光解析电离飞行时间质谱(surface-enhanced laser desorption/ionization time-of-flight mass spectrometry,SELDI-TOF-MS)技术对正常人、HBV相关肝炎、肝硬化患者及原发性肝癌患者术前血清分别进行检测,筛选肝癌血清差异表达蛋白;通过离子交换柱分离纯化其中表达差异最明显的蛋白,并进行质谱鉴定.根据筛选结果,建立肝癌诊断决策树模型,评价其诊断肝癌的准确性和敏感度.结果:与正常组相比,肝癌组有44个差异蛋白质波峰(P＜0.05),其中21个上调,23个下调;与肝硬化组相比,肝癌组有51个差异蛋白质波峰(P＜0.05),其中47个上调,4个下调.质荷比为5 805的蛋白质表达在正常人群＜慢性肝炎组＜肝硬化组＜肝癌组,在肝癌组中表达最高,差异具有统计学意义(P＜0.01);对其酶解消化产物进行肽指纹谱(PMF)鉴定发现其中有2条肽段序列与硫酸软骨素合酶Ⅱ部分序列相匹配.根据筛选的差异表达蛋白成功建立肝癌诊断决策树模型,其判断肝癌的准确率为94.82%[(23 32)/58]、敏感性88.46%(23/26)、特异性100%(32/32).结论:成功筛选HBV相关肝癌血清差异表达蛋白,其中差异最显著蛋白(质荷比为5 805)酶解产物中有2条肽段与硫酸软骨素合酶Ⅱ部分序列相匹配;根据筛选结果建立的肝癌诊断决策树模型有助于早期诊断HBV相关肝癌.     

基于iTRAQ技术的2型糖尿病脾虚证唾液蛋白质组学研究

目的应用同位素标记相对和绝对定量(isobaric tags for relative and absolute quantitation,iTRAQ)蛋白组学技术分析2型糖尿病脾虚证的差异蛋白质谱,从唾液蛋白质水平上阐释2型糖尿病脾虚证的证候本质和生物学机制。方法收集糖尿病脾虚证34例和正常健康组45例唾液样本,分离、鉴定两组的差异蛋白质,并利用生物信息学软件进行分析。结果两组共鉴定到1757个蛋白。以差异倍数≥1.5或≤0.67为筛选标准,共筛选出有意义的差异蛋白155个,其中上调蛋白107个,下调蛋白48个,基于本体论(Gene Ontology,GO)分析显示差异蛋白主要富集在免疫反应、物质代谢、氧气运输等功能分类上;KEGG(Kyoto Encycl-opedia of Genes and Genomes)通路分析差异蛋白主要涉及补体系统代谢通路、脂肪降解和吸收通路、维生素降解和吸收通路等。结论应用iTRAQ技术筛选出可能与2型糖尿病脾虚证发生发展相关的多个差异蛋白,且表明主要与机体免疫系统功能和物质代谢途径有密切关系,为从脾论治2型糖尿病脾虚证的相关机理和本质研究提供重要参考依据。     

胃癌患者血清红桂木凝集素结合蛋白的分析

目的:寻找胃癌患者血清中的差异蛋白,以期为胃癌诊断提供依据.方法:应用生物素—链霉亲和素磁珠结合红桂木凝集素(ALL)后分别与正常人和胃癌患者血清共孵育,经pull-down实验、蛋白质银染、液相色谱串联质谱(LC-MS/MS)鉴定,并结合数据库分析差异蛋白的表达情况.结果:银染分析显示,胃癌组与正常组之间存在明显差异...     

胰腺癌不同进展期血清外泌体蛋白质组学分析

目的 筛选健康对照与不同进展期胰腺癌患者的血清外泌体差异蛋白质,绘制差异蛋白质表达图谱,并分析差异蛋白质参与的生物学过程。方法 采用非标记定量蛋白质组学进行外泌体蛋白质检测,筛选差异蛋白质并进行生物信息学分析;利用蛋白免疫印迹对与胰腺癌进展相关的蛋白质进行血清学验证。结果 在对照组、胰腺癌未转移组和转移组样品中共检测到2 242个蛋白质。通过不同分组差异蛋白质分析,共鉴定出664个差异具有统计学意义的蛋白质,主要参与囊泡介导转运、局灶黏附、细胞外基质(ECM)受体相互作用等信号通路。此外,鉴定到在3组间差异均有统计学意义的蛋白质5个,验证发现富亮氨酸α2糖蛋白1(LRG1)在胰腺癌转移组外泌体中表达量较高。结论 对照组、胰腺癌未转移组和转移组间蛋白质表达存在差异,差异蛋白质主要富集于局灶黏附、细胞外基质受体相互作用等信号通路,且在3组间表达均有差异的外泌体蛋白质LRG1可能成为监测胰腺癌进展的血清学标志物。     

细粒棘球蚴病患者血清蛋白质差异表达分析

目的 筛选细粒棘球蚴病患者血清蛋白质组学标记物,探索其用于细粒棘球蚴病诊断的价值.方法 细粒棘球蚴病患者35例,非棘球蚴病其他肝病对照组17例,健康对照组20例,用弱阳离子交换芯片(CM10芯片)结合表面增强激光解析离子化飞行时间质谱(SELDI-TOF-MS)技术检测血清蛋白质谱,用ZUCI-蛋白芯片数据分析系统软件包进行分析.通过支持向量机运算筛选病例组和对照组血清差异表达蛋白峰,建立细粒棘球蚴病蛋白质指纹图诊断模型并用留一法验证其诊断价值.结果 细粒棘球蚴病患者和健康对照组之间共筛选出8个差异表达蛋白峰,质荷比分别为1044、1046、1055、1075、6452、6649、8714的几个蛋白峰在病例组中下调,质荷比为5651的蛋白峰在病例组中上调(P<0.05);细粒棘球蚴病组和其他肝病对照组之间筛选出1个差异蛋白峰(质荷比为5951,P<0.05);其他肝病组和健康组合并后的对照组和细粒棘球蚴病组之间共筛选出8个差异蛋白峰,留一法验证表明以此差异蛋白峰建立的诊断模型灵敏度为62.86%,特异度为67.57%.结论 SELDI-TOF-MS蛋白质芯片技术能筛选出细粒棘球蚴病患者血清中的差异表达蛋白质,有望能成为细粒棘球蚴病的诊断和研究方法.     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.