紫外分光光度计法检测发酵面团中清球蛋白含量

以小麦粉、酵母菌和植物乳酸菌M616(Lactobacillus plantarum M616)为原料制备酵母发酵面团、乳酸菌发酵面团和混合发酵面团,分别利用紫外分光光度法和凯氏定氮法测定面团发酵过程中清球蛋白含量。检测结果表明,两种方法测得发酵面团中的清球蛋白含量经多重比较均无显著差异(P>0.05)。乳酸菌发酵面团和混合发酵面团发酵过程中,清球蛋白含量随着发酵时间的延长显著下降,而酵母菌发酵面团发酵过程中,清球蛋白的降解较少。因此紫外分光光度法可用于发酵面团中清球蛋白含量的测定。

血清清蛋白/球蛋白比值联合血小板/淋巴细胞比值预测食管鳞状细胞癌预后的价值

目的探讨血清清蛋白/球蛋白比值(AGR)和外周血血小板/淋巴细胞比值(PLR)与食管鳞状细胞癌(ESCC)患者总体生存期(OS)的关系,评估AGR联合PLR对ESCC患者预后的预测价值。方法选择2014年3月至2017年3月因食管癌于该院接受根治性手术治疗的125例ESCC患者为研究对象,并根据患者术前实验室检查结果计算AGR和PLR。通过受试者工作特征(ROC)曲线分析AGR和PLR预测ESCC患者OS的cut-off值。采用Kaplan-Meier曲线评估AGR与PLR对ESCC患者的预后价值。采用单变量、多变量Cox回归分析ESCC患者OS的独立预测指标。结果ROC曲线分析显示,AGR与PLR预测患者OS的cut-off值分别为1.57和126.80,曲线下面积(AUC)分别为0.653(95%CI:0.556~0.750)和0.647(95%CI:0.548~0.747)。生存分析表明,AGR≤1.57组OS(22.0个月,95%CI:14.2~29.8)短于AGR>1.57组(43.0个月,95%CI:36.1~49.9),差异有统计学意义(χ^(2)=10.743,P=0.001)。PLR>126.80组OS(23.0个月,95%CI:10.9~35.1)明显短于PLR≤126.80组(43.0个月,95%CI:36.2~49.8),差异有统计学意义(χ^(2)=8.983,P=0.003)。单变量、多变量Cox分析进一步证实AGR≤1.57与PLR>126.80是ESCC患者OS短的独立预测指标(P<0.05)。根据AGR和PLR的cut-off值,设计了一个AGR联合PLR评分(APS评分):AGR>1.57且PLR≤126.80为0分;AGR≤1.57且PLR>126.80为1分;AGR≤1.57且PLR>126.80为2分。0、1、2分组OS分别为49.0个月(95%CI:36.0~60.9),36.0个月(95%CI:22.1~49.9)和13.0个月(95%CI:9.1~16.9),差异均有统计学意义(P<0.05)。结论术前AGR与PLR是预测ESCC患者预后的有效血液学指标。

血浆纤维蛋白原水平及清蛋白/球蛋白比值与直肠癌患者预后的关系

目的探讨血浆纤维蛋白原(Fg)水平和清蛋白与球蛋白比值(A/G)对直肠癌患者生存预后的影响。方法选取80例直肠癌患者作为直肠癌组,选取80例同期健康体检者作为正常组。比较两组受试者Fg、A/G的表达情况及不同临床特征直肠癌患者的生存情况,并分析直肠癌患者预后的影响因素。结果直肠癌组中Fg的高表达率、A/G的低表达率均明显高于正常组,差异均有统计学意义(P﹤0.01)。80例直肠癌患者的5年总生存率为77.5%(62/80)。单因素分析结果显示,TNM分期为Ⅰ~Ⅱ期、无淋巴结转移、Fg≤4.0 g/L、A/G﹥1.5的直肠癌患者的术后5年平均生存时间均长于TNM分期为Ⅲ~Ⅳ期、有淋巴结转移、Fg﹥4.0 g/L、A/G≤1.5的患者(P﹤0.05);多因素分析结果显示,TNM分期为Ⅲ~Ⅳ期、有淋巴结转移、Fg﹥4.0 g/L、A/G≤1.5均是直肠癌患者预后的独立危险因素(P﹤0.05)。TNM分期为Ⅰ~Ⅱ期、无淋巴结转移、Fg≤4.0 g/L、A/G﹥1.5的直肠癌患者的生存结局均优于TNM分期为Ⅲ~Ⅳ期、有淋巴结转移、Fg﹥4.0 g/L、A/G≤1.5的直肠癌患者(P﹤0.05)。结论Fg高水平、A/G低、TNM分期为Ⅲ~Ⅳ期、有淋巴结转移均是直肠癌患者预后的独立危险因素,Fg≤4.0 g/L、A/G﹥1.5的直肠癌患者的生存结局相对较优。

术前血清白蛋白与球蛋白比值与脑胶质母细胞瘤预后的相关性

目的探讨术前外周血清中白蛋白与球蛋白比值(albumin-to-globulin ratio,AGR)对脑胶质母细胞瘤(glioblastoma,GBM)生存预后的评估价值。方法回顾性分析2012年1月至2015年12月重庆市三峡中心医院88例脑胶质母细胞瘤手术患者的临床资料,经排除后61例GBM患者纳入研究,设为GBM组,按1:2比例匹配年龄、性别、体质指数的健康体检者设为对照组;采用工作特征曲线(ROC)分析计算AGR的截断值,按截断值分为AGR≥1.55和AGR<1.55高低两组,Kaplan-Meier分析两组GBM的总生存时间(overall survival time,OS)及术前AGR对GBM行辅助治疗患者预后的关系的亚组分析;COX比例风险模型单因素及多因素分析OS的预后因素。结果 GBM与对照组比较,术前TP、ALB、AGR低于对照组,差异有统计学意义(P<0.05);ROC确定AGR=1.55为GBM患者预后的最佳截点;Kaplan-Meier分析两组OS比较有统计学意义(P<0.05);Cox多因素分析提示:术前KPS、肿瘤大小、切除范围、AGR、辅助治疗为影响预后的独立因素。Kaplan-Meier分析术前AGR高低对GBM行辅助治疗患者OS有统计学意义(P<0.05)。结论术前AGR比值与脑胶质母细胞瘤预后正相关,可作为潜在的预后标志物。

清/球蛋白比值可靠性的探讨

目的现今使用的清 /球蛋白比值 (A /G)参考值范围 1.5～ 2 .5是否有误 ,作实验论证。方法以经典盐析法与现有自动分析方法对 6 0余例病人血清作总蛋白、清蛋白测定 ,并求出相应 A/G,了解差异程度。结果经典盐析法的 A /G全部高于现有自动分析方法。结论 A

小麦籽粒发育过程中的蛋白质组分析

以京411为材料,研究了籽粒不同发育时期清球蛋白、谷蛋白和醇溶蛋白三个亚蛋白组的合成与积累特征.采用不同的蛋白提取方法,分别利用双向电泳(2-DE)和生物质谱技术(MS)、SDS-PAGE电泳以及反相高效液相色谱(RP-HPLC)等主要蛋白质组技术进行了鉴定与分析,初步得到了三种蛋白的合成与积累特征,为今后小麦发育蛋白质组学以及品质改良研究提供了科学依据.

术前外周血清蛋白与球蛋白比值在非转移性肾透明细胞癌预后预测中的价值

目的探讨术前外周血清蛋白与球蛋白比值(AGR)对非转移性肾透明细胞癌(NMCCRCC)患者预后预测中的价值。方法回顾性分析2012年1月至2014年12月大连大学附属中山医院收治的61例术后病理确诊为NMCCRCC患者的临床病理及术后随访资料。根据受试者工作特征曲线(ROC)确定AGR最佳截点值,根据截点值分为高AGR组(AGR≥1.59)和低AGR组(AGR<1.59)。对影响NMCCRCC患者预后的因素进行单因素和多因素分析。结果61例NMCCRCC患者中,高AGR组38例(62.3%),低AGR组23例(37.7%)。两组患者年龄、球蛋白水平、临床分期、复发情况比较,差异均有统计学意义(均P<0.05)。低AGR组的总生存时间、无病生存时间均短于高AGR组,差异均有统计学意义(均P<0.05)。多因素Cox回归分析显示,AGR<1.59是患者总生存及复发的独立影响因素(HR=0.233,95%CI 0.073~0.742,P=0.014;HR=0.343,95%CI 0.134~0.873,P=0.025)。结论术前AGR对NMCCRCC患者预后有预测价值。

血β_2微球蛋白检测对喉癌的诊断价值

为探讨P-β_2M对喉癌的诊断价值。本文对30例喉鳞状细胞癌患者进行了检测,将结果与声带息肉患者及正常对照组作对比,发现喉癌患者的P-β_2M含量为2. 51±0. 69μg/ml,声带息肉患者为1. 79±0. 47μg/ml,两组间差异显著。喉癌组与对照组差异显著,而声带息肉组与对照组无明显差异。认为P-β_2M检测可作为喉癌的辅助诊断方法。

北京房山区健康人群6项生化指标参考区间验证分析

目的验证北京市房山区健康体检人群丙氨酸氨基转移酶（ALT）、天门冬氨酸氨基转移酶（AST）、总蛋白（TP）、清蛋白（ALB）、球蛋白（GLB）、清蛋白/球蛋白比值（A/G）的参考区间是否符合行业标准参考区间。方法按照卫生部2012年12月发布的行业标准WS/T 404-2012《临床常用生化检验项目参考区间》中第1部分和第2部分相关指标的参考人群筛选标准,从北京房山区第一医院体检中心2013年1-12月筛选18-84岁健康体检者5 798例,其中男3 046例,女2 752例,使用非参数统计方法统计该研究人群的参考区间,与行标参考区间进行比较。结果北京市房山区健康体检人群ALT、AST、TP、ALB、GLB、A/G得到的参考区间,与行业标准比较,基本一致。结论国家新的常用生化检验项目参考区间行业标准,适用于北京市房山区成年人群。

Bovine Serum Albumin (BSA) Microspheres Containing Methotrexate (MTX) I.Pharmaceutical Aspects

Microspheres Ⅰ,Ⅱ and Ⅲ were produced by emulsion technique.Microsphere I was solidified by glutaraldehyde crosslinking,microsphere Ⅱ was solidified by glutaraldehyde crosslinking and further treated with glycine solution and microsphere Illwas solidified by heating denaturation only.The results showed that the microsphere diameter produced by cross[inking was bigger than that prepared by heating.The microsphere Ⅱ had higher hydrophilicity than Microsphere I had.The methotrexate (MTX) contents in microspheres Ⅰ and Ⅱ were 2.73±0.053%,2.87±0.119% respectively. microsphere Ⅲ was only blank microspheres with MTX adsorbed on their surfaces.In vitro release studies,microspheres I and I have maintained sustained release of MTX till the next day,it was found that the drug releases from microspheres Ⅰ and Ⅱ were governed by Higuchi diffusion law.

肾性贫血患者外周血红细胞参数与微炎症指标相关性分析

目的通过分析肾性贫血患者红细胞参数与微炎症指标的相关性,对肾性贫血患者微炎症做出有效提示,利于微炎症状态尽早纠正。方法选取2017年3月～2018年3月在肾内科住院的慢性肾衰竭(CRF)伴贫血患者120例作为病例组,选同期体检正常人群150例作为对照组。对病例组与对照组血细胞参数RBC,HGB,MCV,MCH,MCHC和RDW进行检测;对肾性贫血患者红细胞形态学进行检查;对微炎症相关指标CRP,ALB和A/G进行检测;对红细胞参数和微炎症指标进行相关性分析。结果病例组RDW和CRP明显高于对照组,RBC,ALB和A/G值明显低于对照组,差异均有统计学意义(P<0.05),病例组MCV,MCH和MCHC与对照组比较差异无统计学意义(P>0.05);细胞形态学提示,肾性贫血患者成熟红细胞普遍存着红细胞大小不等、异形性的特点;病例组RDW与CRP,ALB和A/G值存在相关性。结论肾性贫血以正细胞正色素性贫血为主,并伴有一定比例其他类型的贫血,RDW与微炎症状态有关,RDW可对肾性贫血患者处于微炎症状态起到提示作用。

A/G和WBC预测脑梗死恢复期患者电针联合综合训练预后价值

目的探讨清蛋白与球蛋白比值(A/G)和白细胞计数(WBC)预测脑梗死恢复期患者电针联合综合训练治疗的预后价值。方法选取2018年2月至2021年11月在皖西卫生职业学院附属医院成人康复科住院并行电针联合综合训练治疗的脑梗死恢复期患者135例,根据出院时改良Rankin量表(mRS)评估患者预后,根据评估情况分为预后良好组(n=81)和预后不良组(n=54),比较两组患者的临床资料和入院时血液检测指标,采用多因素Logistic回归分析预后影响因素,采用受试者工作特征(ROC)曲线分析预后价值。结果预后不良组的年龄、发病至治疗时间均大于预后良好组,WBC、中性粒细胞计数、单核细胞计数、嗜酸性粒细胞计数和球蛋白均显著高于预后良好组,差异有统计学意义(P<0.05),清蛋白、A/G、载脂蛋白A1、高密度脂蛋白胆固醇与单核细胞比值均显著低于预后良好组,差异有统计学意义(P<0.05)。多因素Logistic回归分析显示发病至治疗时间延长(OR=1.036,P=0.004)、WBC升高(OR=1.394,P=0.008)和A/G降低(OR=0.035,P<0.001)是电针联合综合训练治疗脑梗死恢复期不良预后的独立危险因素。A/G、WBC单独和联合预测预后不良的曲线下面积(AUC)比较,差异无统计学意义(P>0.05),联合预测、WBC和A/G预测不良预后的灵敏度和特异度分别为72.20%和74.10%、40.70%和84.00%、87.00%和51.90%。结论A/G降低和WBC升高是电针联合综合训练治疗脑梗死恢复期不良预后的独立风险因子,联合检测具有较高的预测灵敏度和特异度。

Relationship between serum b2-microglobulin levels and virological breakthrough in HBeAg-negative chronic hepatitis B patients,under long-term treatment schedules including lamivudine

AIM: Predictive value of serum b2-microglobulin (b2m)levels for virological breakthrough (VB) in HBeAg-negative chronic hepatitis B (CHB) patients under long-term treatment schedules including lamivudine (LAM).METHODS: Serum b2m levels were calculated during treatment in 25 CHB patients under long-term LAM monotherapy (group A) and 12 patients under initial interferon plus LAM treatment followed by LAM monotherapy (group B), using the MEIA technology. We used Cox proportional hazard models in order to investigate the association between serum b2m levels and VB.RESULTS: Seven of 25 patients (28%), 9/25 (36%) and 14/25 (56%) from group A and 0/12, 2/12 (16.6%) and 3/12 (25%) from group B exhibited VB at months 12, 24 and 36 of treatment, respectively. All patients, from both groups, who did not show VB exhibited b2m elevation in mo 3. The duration of b2m elevation was significantly longer in the virological responder's subgroup from group A than the non-responder's one (7.3±2.6 vs 3.8±3.4 mo,P = 0.02). In comparison to group A patients whose b2m levels were increased at 3 mo, patients whose b2m levels were decreased had 4.6 times higher risk of experiencing VB (RR = 4.6, P = 0.024). When baseline variables were simultaneously included in the same Cox model, decreased b2m status was still associated with increased risk of VB (RR = 12.2, P = 0.03).CONCLUSION: In HBeAg-negative CHB patients under either long-term LAM monotherapy or initial combination treatment, serum b2m levels at 3 mo of treatment,compared to baseline ones, might be a predictor of risk for VB.

Association between autoimmune pancreatitis and systemic autoimmune diseases

AIM: To investigate the association between autoimmune pancreatitis (AIP) and systemic autoimmune diseases (SAIDs) by measurement of serum immunoglobulin G4 (IgG4). METHODS: The serum level of IgG4 was measured in 61 patients with SAIDs of different types who had not yet participated in glucocorticosteroid treatment. Patients with an elevated IgG4 level were examined by abdominal ultrasonography (US) and, in some cases, by computer tomography (CT). RESULTS: Elevated serum IgG4 levels (919 ± 996 mg/L) were detected in 17 (28%) of the 61 SAID patients. 10 patients had Sj gren's syndrome (SS) (IgG4: 590 ± 232 mg/L), 2 of them in association with Hashimoto's thyroiditis, and 7 patients (IgG4: 1388 ± 985.5 mg/L) had systemic lupus erythematosus (SLE). The IgG4 level in the SLE patients and that in patients with SS were not significantly different from that in AIP patients (783 ± 522 mg/L). Abdominal US and CT did not reveal any characteristic features of AIP among the SAID patients with an elevated IgG4 level. CONCLUSION: The serum IgG4 level may be elevated in SAIDs without the presence of AIP. The determination of serum IgG4 does not seem to be suitable for the differentiation between IgG4-related diseases and SAIDs.

Differences between diffuse and focal autoimmune pancreatitis

AIM:To investigate differences in clinical features between diffuse-and focal-type autoimmune pancreatitis(AIP).METHODS:Based on radiological findings by computed tomography and/or magnetic resonance imaging,we divided 67 AIP patients into diffuse type(D type) and focal type(F type).We further divided F type into head type(H type) and body and/or tail type(B/T type) according to the location of enlargement.Finally,we classified the 67 AIP patients into three groups:D type,H type and B/T type.We compared the three types of AIP in terms of clinical,laboratory,radiological,functional and histological findings and clinical course.RESULTS:There were 34 patients with D-type,19 with H-type and 14 with B/T-type AIP.Although obstructive jaundice was frequently detected in D-typepatients(88%) and H-type patients(68%),no B/T-type patients showed jaundice as an initial symptom(P < 0.001).There were no differences in frequency of abdominal pain,but acute pancreatitis was associated more frequently in B/T-type patients(36%) than in D-type patients(3%)(P = 0.017).Serum immunoglobulin G(IgG)4 levels were significantly higher in D-type patients(median 309 mg/dL) than in B/T-type patients(133.5 mg/dL)(P = 0.042).Serum amylase levels in B/T-type patients(median:114 IU/L) were significantly greater than in H-type patients(72 IU/L)(P = 0.049).Lymphoplasmacytic sclerosing pancreatitis(LPSP) was histologically confirmed in 6 D-type,7 H-type and 4 B/T-type patients;idiopathic duct-centric pancreatitis was observed in no patients.Marked fibrosis and abundant infiltration of CD20-positive B lymphocytes with few IgG4-positive plasma cells were detected in 2 B/T-type patients.Steroid therapy was effective in all 50 patients(31 D type,13 H type and 6 B/T type).Although AIP relapsed during tapering or after stopping steroids in 3 D-type and 3 H-type patients,no patients relapsed in B/T type.During follow-up,radiological features of 6 B/T-type patients were not changed and 1 B/T-type patient improved naturally.CONCLUSION:Clinical features of H-type AIP were similar to those of D-type,but B/T-type differed from D and H types.B/T-type may involve diseases other than LPSP.

Specific serum immunoglobulin G to H pylori and CagA in healthy children and adults(south-east of Iran)

AIM. To evaluate the serologic IgG response to Hpylori and CagA across age groups and in healthy children and adults.METHODS： Totally, 386 children aged 1-15 years and 200 adults aged 20-60 years, were enrolled to study. The serum samples of participant were tested for presence of antJ-Hpylori and anti-CagA IgG by using ELISA method.RESULTS： The seroprevalence of Hpylori in adults was significantly higher than that observed in children （67.5% vs 46.6%; P 〈 0.000003）. In children, the seropositivity rate in males （51.9%） was significantly （P 〈 0.05） higher than that observed in females （41.7%）. The prevalence of serum anti-CagA antibody was 72.8% and 67.4% in infected children and adults, respectively. The mean titer of serum anti-CagA antibodies was significantly higher among children in comparison to adults （64.1 Uarb/mL 30.7; P 〈 0.03）. In infected children and adults the prevalence of serum anti-CagA antibody was higher in males compared to females （78.4% vs 66.3%; P = 0.07 and 75.6% vs 54.71%; P 〈 0.04, respectively）. The age-specific prevalence of anti-H py/or/and anti-CagA antibody （in infected subjects） was 37.6% and 59.57% at age 1-5 years, 46.9% and 75% at age 6-10 years, 54.9% and 79.45% at age 11-15, 59.01% and 83.33% at age 20-30 years, 66.6% and 60.52% at age 31-40 years, 73.46% and 63.88% at age 41-50 years and 75.75% and 60% at age 51-60 years with mean titer of anti-CagA antibody of 75.94, 63.32, 57.11, 52.06, 23.62, 21.52 and 21.80 Uarb/mL, respectively. There was significant difference between mean serum anti-CagA antibody in age subgroups （P 〈 0.001）.CONCLUSION： These results showed that anti-Hpylori and anti-CagA antibodies were common in the children and adults. The Hpylori-specific antibodies influenced by age and sex of subjects. Moreover, it seems that males are more susceptible to infection with CagA^＋ strains compared to females. The seroprevalence of anti-CagA antibody was increased with age, up to 30 years and then decreased. It was also found that the magnitude of the IgG response to CagA decreased with advanced age.

Sustained virologic response following HCV eradication in two brothers with X-linked agammaglobulinaemia

X-linked agammaglobulinaemia (XLA) is a humoral immunodeficiency syndrome characterized from childhood by the absence of circulating B lymphocytes, absent or reduced levels of serum immunoglobulin and recurrent bacterial infections. For many affected patients, regular treatment with immunoglobulin is life saving. Hepatitis C viral (HCV) infection acquired through contaminated blood products is widely described in this patient cohort. The natural history of HCV infection in patients with XLA tends to follow a more rapid and aggressive course compared to immunocompetent individuals. Furthermore, standard anti-viral therapy appears to be less efficacious in this patient cohort. Here we report the cases of two brothers with XLA who contracted HCV through contaminated blood products. They were treated with a six month course of Interferon alpha-2b and Ribavirin. We report a sustained virologic response five years after completing treatment.

Preparation of magnetic gelatin-starch microspheres and adsorption performance for bovine serum album

The magnetic gelatin-starch microspheres were prepared by modified emulsion cross-linking method with glutaraldehyde as the cross-linking agent. The structure, size distribution as well as morphology of magnetic microspheres were investigated by FT-IR spectrometer, dynamic laser scattering analyzer and scanning electron microscope, respectively. Bovine serum album(BSA)was chosen as model protein, and the adsorption processes were carried out under diversified conditions including BSA initial concentration, p H value, adsorption time and temperature to evaluate the performance of the magnetic microspheres. The average diameter of optimized spherical magnetic microspheres is 1.6 μm with excellent dispersivity, and the saturation magnetization is found to be equal to 1.056×10-2 A·m2. The adsorption isotherm of the BSA on the magnetic microspheres basically obeys the Langmuir model, with a maximum adsorption capacity of 120 mg/g and an adsorption equilibrium constant of 1.60 mL/mg.

Radiofrequency induction on sodium/iodide symporter expression of thyroid cancer

Objective; The aim of this study was to investigate the effects of radiofrequency treatment on sodium/iodide symporter expression of thyroid cancer ceils. Methods： In 29 thyroid cancer patients with low or no expression of soda ／ iodide symporter, the radio frequency combined 1311 therapy was used, the whole-body scintigraphy and serum Ig were detected before and after the radiofrequency treatment. Results： The whole-body scintigraphy showed that 4 cases （4/29） before radiofrequenc_y treatment had positive iodine uptake, 19 cases （19/29） two weeks after radiofrequency treatment had the positive iodine uptake, 12 cases （12/29） four weeks after radiofrequency treatment had the positive iodine uptake. Four weeks after radiofrequency treatment, 5 cases had increased serum Ig levels, 17 cases had decreased serum Ig levels, 7 cases showed no change. 25 cases （25/29） were effective, 15 cases （15/29） were cured. Conclusion： The radiofrequency induced the non-expressed the sodium/iodide symporter of thyroid cancer cells regain the iodine intake ability, it improved the clinical efficacy of 131I therapy in dedifferentiated thyroid cancer.