抗C1q抗体与系统性红斑狼疮患者病情活动的相关性及其临床意义

目的探讨抗C1q抗体（C1qAb）与系统性红斑狼疮（SLE）患者病情活动的相关性及其临床意义。方法用酶联免疫吸附实验（ELISA）检测98例SLE患者、108例其他风湿病患者及67例健康体检者中血清抗C1qAb,并对SLE患者的其他实验室检测结果进行统计学分析。结果SLE患者血清中抗C1qAb阳性率显著高于其他风湿病及健康体检者（P〈0．05）;其中,抗C1qAb阳性的SLE患者肾损发生率、活动性狼疮发生率及抗dsDNA抗体的阳性率均高于抗C1qAb阴性患者（P〈0．05）。结论血清抗C1qAb与SLE肾脏损害密切相关,其还可作为判断SLE病情活动的指标。     

C1q受体研究进展

补体分子C1q具有调节各种细胞反应的能力.近年,随着C1q功能研究的深入,发现许多细胞内或者细胞表面存在结合C1q的蛋白或者受体,如C1qRp、gC1qbp、C1qRo2-、钙网素/CRT/cC1qR胶凝素受体、CR1.其中某些蛋白除结合C1q外还结合其它配体.     

G蛋白参与C1q／C1qR系统介导的信号转导

ａｇｇ－Ｃ１ｑ可抑制人Ｔ细胞系Ｊｕｒｋａｔ和Ｍψ系Ｕ９３７细胞受霍乱毒素刺激的（ｃＡＭＰ）ｉ增高，而百日咳毒素能遏止人Ｂ细胞系Ｒａｊｉ细胞ａｇｇ－Ｃ１ｑ诱导的（ｃＡＭＰ）ｉ升高和Ｃ１ｑＲ交联所促成的磷脂酰肌醇水解。表明：Ｇ蛋白介入了Ｃ１ｑ／Ｃ１ｑＲ系统介导的信号转导途径。     

血清补体C1q水平与2型糖尿病视网膜病变的相关性研究

目的:探讨血清补体C1q水平与2型糖尿病视网膜病变(DR)的相关性。方法:纳入2021-09—2022-09喀什地区第一人民医院内分泌科住院的2型糖尿病患者146例,根据有无并发DR分为DR组67例和糖尿病组(DM组)79例。纳入同期体检正常者81例作为正常对照(对照组)。全自动生化分析仪检测C1q、C反应蛋白(CRP)、血糖(FPG)、甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)和低密度脂蛋白胆固醇(LDL-C)的水平;采用糖化血红蛋白仪检测糖化血红蛋白(HbA1c)水平。Logistic回归分析C1q与DR的相关性,ROC曲线分析C1q对DR的诊断效能。结果:与对照组比较,DM组和DR组患者FPG、HbA1c、TC、TG(DM组除外)、LDL-C(DM组除外)、CRP和C1q水平均升高;与DM组比较,DR组血清C1q水平明显升高,差异均有统计学意义(P<0.05或P<0.01)。在充分调整了协变量后,Logistic回归分析显示,三种模型中,C1q水平均与DR的发生呈正相关。ROC曲线显示,C1q诊断DR的ROC曲线下面积为0.716(0.631...     

C1q、C1r和C1s的快速分离

建立了一种同时快速分离纯化C1q及酶原形式C1r和C1s的方法。用IgG Sepharose 4B亲和层析将C1q与C1r2 s2 分离 ,接着用DEAE Sephacel离子交换层析将C1r和C1s分离 ,用C1qMcAb Sepharose 4B亲和层析将C1q进一步纯化。在分离Clr和C1s的整个过程中加入蛋白水解抑制剂PMSF和NPGB ,并控制温度在 4℃、pH 6 1、无二价阳离子的条件下 ,得到高度纯化的C1q、C1r和C1s。     

CRP与ESR在骨科内固定手术后的表达变化及意义

目的 探讨C反应蛋白(C-reaction protein,CRP)与红细胞沉降率(erythrocyte sedimentation rate,ESR)在骨科内固定手术后的表达变化及意义.方法 选取87例骨科内固定手术患者作为研究对象,其中38例患者术后感染作为感染组,另外49例患者术后无感染作为非感染组;于术前、术后1、3、7、14天时,检测所有患者的CRP与ESR表达水平,分析骨科内固定手术后感染患者的CRP与ESR表达变化规律;并对比感染组与非感染组患者的CRP与ESR峰值、CRP表达水平异常率、ESR表达水平异常率.结果 38例骨科内固定手术后感染患者,术后14天内的CRP与ESR表达水平均显著高于术前水平,呈递增式变化;49例骨科内固定手术后非感染患者,术后CRP与ESR表达水平呈先递增后递减式变化,且术后3天CRP表达水平、术后7天ESR表达水平均显著高于术前水平(P＜0.05);感染组患者术后CRP与ESR峰值、CRP表达水平异常率、ESR表达水平异常率均显著大于非感染组(P＜0.05);将CRP、ESR联合考虑,任一指标超过阈值则诊断感染,两项指标均未超过阈值则排除感染,则对骨科内固定手术后感染诊断的灵敏度为99.00％,特异度为97.00％.结论 骨科内固定手术后CRP与ESR的表达水平均呈先递增后递减的规律性变化,通过监测CRP与ESR的表达变化,有利于早期感染的发现,且CRP比ESR更敏感,两者均可作为评估术后感染发生风险、病情严重程度、疗效及预后的观察指标.     

C1q和抗C1qRnAb抑制U937细胞产生TNF—α

人Ｍφ系Ｕ９３７细胞可在ＰＭＡ／ＬＰＳ诱导下产生了ＴＮＦ－α。这种ＴＮＦ－α的诱生可被Ｃ１ｑ以剂量依赖方式所抑制，而且多聚Ｃ１ｑ的抑制作用比单体Ｃ１ｑ强约１０倍。将Ｃ１ｑ热灭活或加入抗入Ｃ１ｑＦ（ａｂ）２Ｃ１ｑ的抑制作用即消失，证实该作用是Ｃ１ｑ。此外，抗人Ｃ１ｑＲｍＡｂＥ８能模拟Ｃ１ｑ诱导类似的抑制效应，这些资料提示了Ｃ１ｑ／Ｃ１ｑＲ系统的一项新功能，提供了该系统与细胞因子网络联系的直接证据。     

C1q结合十二肽的活性研究

目的研究5个C1q结合十二肽及其牛血清白蛋白(BSA)偶联物对C1q的结合活性和溶血活性的影响。方法人工合成十二肽，将其与BSA偶联，分别用U937细胞配体结合抑制试验、多聚IgG(AJgG)竞争抑制试验、CH50抑制试验测试其生物学活性。结果游离的线性肽对C1q的结合活性和溶血活性几乎无影响，而偶联肽对C1q与U937细胞表面受体、AJgG的结合以及C1q介导的溶血均有抑制作用。结论本实验获得5个C1q受体模拟肽，它们能抑制C1q与免疫复合物结合，从而阻断补体经典途径的激活，其对于补体异常激活有关疾病的防治具有潜在应用价值。     

血清补体C1q与狼疮肾炎及糖尿病肾病的相关性分析

目的 探讨血清补体C1q在狼疮肾炎与糖尿病肾病中的变化,为临床狼疮肾炎与糖尿病肾病的诊断与鉴别诊断提供理论依据.方法 选取2015年10月至2016年10月我院住院治疗狼疮肾炎患者33例,糖尿病肾病患者57例,同期体检健康人104例作为对照组,分别测定其血清补体C1q水平.结果 狼疮肾炎组血清补体C1q水平明显低于糖尿病肾病组(P=0.00)和对照组(P=0.001);糖尿病肾病组与对照组比较差异无统计学意义.结论 血清补体C1q水平在各组受试者中不同,检测血清补体C1q水平可用于狼疮肾炎与糖尿病肾病的诊断与鉴别诊断.     

C1q结合十二肽的筛选与初步鉴定

目的　从噬菌体十二肽库中筛选结合C1q的短肽并进行初步鉴定。方法　以C1q为钓饵蛋白筛选噬菌体十二肽库 ,利用ELISA、U937细胞配体结合抑制试验、多聚IgG(AIgG)竞争抑制试验鉴定阳性克隆 ,再进行单链DNA测序和分析。结果　经 3轮筛选后 ,随机挑选 2 5个噬菌体克隆做ELISA鉴定 ,14个克隆显示与C1q有较强的结合。经过U937细胞配体结合抑制试验和AIgG竞争抑制试验鉴定后 ,将此 14个阳性克隆测序 ,从其展示肽DNA测序结果推导氨基酸序列 ,获得 9条氨基酸序列 :HWDPFSLSAYFP、WTPVRTNPFLLH、NGHLFSLSAYFP、RTQRNSPFFLCP、SPAFHPEHMGRG、SRAFHPFYRGRA、WYEGPFTLQTWP、LTQHNSPFFLLP和TSNPFFLWYPQP。结论　获得结合C1q的一些抑制性短肽 ,它们可能成为抑制补体经典途径激活的肽类先导化合物     

Positive Correlation of STAT1 and miR-146a with Anemia in Patients with Systemic Lupus Erythematosus

Purpose

Anemia is one of the most common hematological manifestations in SLE patients, occurring in about 50 % of active cases. STAT1 is a critical signaling molecule required for the production of type-1 interferon (I-IFN), CCL2, and CXCL10, all of which are upregulated in SLE. Overexpression of STAT1 has been described to be involved in anemia in animal models. The aim of this study is to analyze how these components are involved in SLE-associated anemia.

Methods

Blood samples were collected from 39 healthy donors and 101 SLE patients fulfilling ACR criteria. Samples were collected from a total of 180 visits (58 patients had 2 or more visits) of which 52 visits included a diagnosis of anemia. Healthy donors had only single visit. Total RNA, isolated from leukocytes, was analyzed by Taqman qPCR. Relative expression levels of I-IFN signature genes, chemokines, and miR-146a were determined by the ΔΔCT method. Results were correlated with clinical data and analyzed by the Wilcoxon/Kruskal-Wallis test and Fisher’s exact test.

Results

Significant increases in IFN score (p?<?0.0001), STAT1 (p?<?0.0001), miR-146a (p?<?0.0005), CCL2 (p?=?0.0047), and CXCL10 (p?=?0.017), as well as a significant decrease in pri-miR-146a (p?=?0.0002), were detected in the anemic SLE patient visits (n?=?52) compared to non-anemic SLE visits (n?=?128). Regardless of disease activity, lupus nephritis, or race, anemic SLE patients displayed significantly elevated levels of STAT1 and miR-146a compared to non-anemic SLE patients.

Conclusions

STAT1 and miR-146a may be upregulated during inflammation and via proinflammatory cytokines and chemokines in SLE. Prolonged upregulation of STAT1 and miR-146a appears to play an important role in anemia in SLE patients.     

慢性肾脏病患者肾小球滤过率与血清Cystatin C相关性分析

探讨慢性肾脏病(chronic kidney disease,CKD)患者肾小球滤过率(glomentlar filtration rate,GFR)与血清半胱氨酸蛋白酶抑制剂C(cystatin C)的相关性.采用颗粒增强免疫浊度分析法测定340例CKD组患者和60名对照组血清cystatin C,全自动生化分析仪检...     

Erythrocyte Sedimentation Rate: Evaluation of a Micro Technique

Determination of erythrocyte sedimentation rate (ESR) in capillary blood can be of value in evaluating sick newborns. In this study, ESR determined by Wintrobe''s method correlated very well with “micro” ESR determined in Natelson heparinized capillary tubes. Micro ESR requires a small amount of blood which can be obtained easily by heel stick and this test is easy to perform.     

血清转氨酶水平与多发性硬化患者血脑屏障破坏的相关性研究

目的 探究多发性硬化（MS）患者血清中谷草转氨酶（AST）、谷丙转氨酶（ALT）水平和临床特点之间的关系。方法 收集中山大学附属第三医院神经内科2010年1月~2016年12月99例首次确诊为MS患者作为MS组,选择同期103名健康体检者作为对照组。检测两组血清AST、ALT水平,同时将MS组患者的扩展残疾状况评分（EDSS）及头颅磁共振结果（MRI）病灶活动性纳入统计,比较两组血清AST、ALT水平,分析AST、ALT水平与疾病活动性以及EDSS评分的相关性。结果 MS组患者血清ALT水平高于正常组[（28.55±2.68）U/L vs （19.86±1.67）U/L],差异有统计学意义（P＜0.05）;MS组患者AST/ALT水平较正常组降低[（1.06±0.09）vs （1.37±0.07）],差异有统计学意义（P＜0.05）;MS组男性患者血清ALT水平高于对照组男性,男性及女性患者的AST/ALT值均低于对照组的男性和女性,差异均有统计学意义（P＜0.05）;MS组患者男性血清ALT水平高于女性患者,AST/ALT低于女性患者,差异均有统计学意义（P＜0.05）;未发现ALT、AST水平和EDSS评分及MRI病灶活动性之间有相关性。结论 MS患者血清转氨酶水平高于正常人群,其可能是MS患者血脑屏障破坏的一个生物学标记物。     

Serum Concentrations of Cyclooxygenase-2 in Patients with Systemic Sclerosis: Association with Lower Frequency of Pulmonary Fibrosis

Systemic sclerosis (SSc) is a multisystem disease in which interplay between inflammation, autoimmunity and fibrosis appears to play an indispensable role. Owing to the suggested role of cyclooxygenase-2 enzymes (Cox-2) in inflammation and fibrosis, we investigated their serum concentrations in SSc patients and their clinical and laboratory associations. Serum from 49 patients with SSc, 28 of whom had limited cutaneous SSc (lSSc) and 21 had diffuse cutaneous SSc (dSSc) subtypes, and from 27 healthy subjects were assayed for Cox-2 and TNF by enzyme-linked immunosorbent assay (ELISA). Demographic, clinical, autoantibodies and serological data were prospectively assessed. The analysis revealed that patients with lSSc had higher levels of serum Cox-2 than controls. Serum Cox-2 levels were increased in SSc patients with arthritis and digital ulcers; on the contrary, these were diminished in those with associated pulmonary fibrosis. An additional prospective large scale, longitudinal study should be carried out to support these findings and to reveal the mechanistic connections between Cox-2 levels and SSc disease manifestations.     

系统性硬皮病患者血小板参数分析

目的观察系统性硬皮病(systemic scleroderma,SSc)患者的血小板分布宽度(platelet distribution width,PDW)、血小板计数(platelet count,PLT)、血小板平均体积(mean platelet volume,MPV)、血小板比率(platelet ratio,P-LCR)的水平,探讨PLT、PDW、MPV、P-LCR与SSc的关系。方法用全自动血液分析仪EX2100测定97例确诊的SSc患者的PLT、PDW、MPV、P-LCR参数,同等条件下与正常人作对照,并进行方差分析。结果 SSc患者治疗前PLT明显低于正常对照组(P <0.01),而PDW、MPV和P-LCR均显著高于正常对照组(P <0.01)。SSc患者治疗后的PLT与治疗前差异无统计学意义(P>0.05),而PDW、MPV和P-LCR均较治疗前显著下降(P <0.01)。结论 SSc患者治疗前PLT水平较低,PDW、MPV、P-LCR水平较高。通过SSc患者的血液常规检查有助于SSc发病机制的探讨及为临床诊治后的疗效提供实验室依据。     

Elevated Serum Levels of Arachidonoyl-lysophosphatidic Acid and Sphingosine 1-Phosphate in Systemic Sclerosis

Systemic sclerosis (SSc) is an often fatal disease characterized by autoimmunity and inflammation, leading to widespread vasculopathy and fibrosis. Lysophosphatidic acid (LPA), a bioactive phospholipid in serum, is generated from lysophospholipids secreted from activated platelets in part by the action of lysophospholipase D (lysoPLD). Sphingosine 1-phosphate (S1P), a member of the bioactive lysophospholipid family, is also released from activated platelets. Because activated platelets are a hallmark of SSc, we wanted to determine whether subjects with SSc have altered serum lysophospholipid levels or lysoPLD activity. Lysophospholipid levels were measured using mass spectrometric analysis. LysoPLD activity was determined by quantifying choline released from exogenous lysophosphatidylcholine (LPC). The major results were that serum levels of arachidonoyl (20:4)-LPA and S1P were significantly higher in SSc subjects versus controls. Furthermore, serum LPA:LPC ratios of two different polyunsaturated phospholipid molecular species, and also the ratio of all species combined, were significantly higher in SSc subjects versus controls. No significant differences were found between other lysophospholipid levels or lysoPLD activities. Elevated 20:4 LPA, S1P levels and polyunsaturated LPA:LPC ratios may be markers for and/or play a significant role in the etiology of SSc and may be future pharmacological targets for SSc treatment.     

Correlation of IgG Fc Receptors on Granulocytes with Serum Immune Complex Level in Systemic Lupus Erythematosus

The expression of FcγRI, FcγRII and FcγRIII on granulocytes in the blood of patients with systemic lupus erythematosus was investigated. The relationship between the receptor expression and serum immune complex (IC) concentration was analysed. The decrease in mean fluorescence intensity of both FCγRII and FcγRIII of patients' granulocytes stained by specific monoclonal antibodies (using MoAb IV. 3 and 3G8) was significant. The detected decrease of FcγRII was inversely correlated with the high circulating IC level in patients' sera.     

Serum Soluble Interleukin-2 Receptor, Beta2-Microglobulin, Lactate Dehydrogenase and Erythrocyte Sedimentation Rate in Children with Hodgkin's Lymphoma

The study was to determine clinical utility of serum soluble interleukin (IL)-2 receptor (sIL-2Rα), β₂-microglobulin (β₂-M), lactate dehydrogenase (LDH) and erythrocyte sedimentation rate (ESR) as markers of diagnosis, prognosis and monitoring of response to therapy in childhood Hodgkin's lymphoma (HL). The markers were measured prospectively before treatment and in complete remission (CR) during and after therapy in 30 children with HL (F/M:19/11; median age: 11.3 years) and once in 50 healthy children (F/M: 24/26; median age: 8.7 years). Median pretreatment levels of all analysed markers were significantly higher than in healthy controls. Increased pretreatment sIL-2Rα, LDH and ESR correlated with bulky disease; sIL-2Rα, β₂-M and ESR with presence of B symptoms and sIL-2Rα and LDH with advanced HL stages. There was a correlation between sIL-2Rα and LDH and between β₂-M and ESR. The levels and rates of elevated markers reflected well the response to chemotherapy, decreasing significantly when patients achieved CR and further on with therapy continuation. Since all patients survived thus the markers' value to predict the outcome was not established. Serum sIL-2Rα, β₂-M, LDH and ESR may act as markers for diagnostics and used in monitoring of therapy effectiveness in childhood HL. The markers were also increased in subgroups of patients with unfavourable clinical features; however, small sample size of the study did not allow to draw conclusion on their prognostic roles. We were also not able to establish the influence of markers on event free survival and overall survival because all children survived independent of initial clinical characteristics and pretreatment levels of sIL-2Rα, β₂-M, LDH and ESR.