系统性红斑狼疮患者C1q受体和C1q抗体的表达及其与发病相关性的研究

目的 检测系统性红斑狼疮（SEE）患者外周血单个核细胞C1qRp和gC1qR的表达及与C1q抗体、补体C1q水平的关系，并进一步探讨其在SLE发病中的意义。方法 用流式细胞计数法测定58例SLE和30名正常人外周血中性粒细胞、单核细胞、淋巴细胞的C1qRp和gc1qR的表达，同时测血清C1q抗体、C1q水平．并将其与C3、c4、抗核抗体（ANA）、抗dsDNA抗体、SLEDAI积分做相关性分析。结果 SLE患者外周血中性粒细胞、单核细胞的C1qRp表达为（7．2±2-3）％和（3．4±2．1）％，均较正常人[（10．6±2．1）％和（9．0±8．7）％]降低（P〈0．05），淋巴细胞不表达C1qRp，但可表达gC1qR。C1qRp在SLE活动期表达略低于稳定期，但差异无统计学意义。SLE患者的gC1qR表达略高于正常人．gC1qR在活动期高于稳定期，但差异无统计学意义。SLE患者血清C1q抗体水平（98±41）U／ml，明显高于正常，C1q为（0．13±0．08）dE，低于正常值。外周血单个核细胞的C1qRp表达与血清C1qAb水平（Pearsonr=-0．574，P〈0．05）、双链DNA（ds—DNA）抗体滴度呈负相关，与补体C1q（Pearsonr=0．673．P〈0．01）、C3、C4水平呈正相关。gc1qR与C1qAb和补体C1q无明显相关性。结论 SLE患者外周血中性粒细胞、单个核细胞C1qR的表达缺陷，导致SLE吞噬功能受损，凋亡细胞清除障碍，诱导产生自身抗体，在SLE的免疫发病机制中起重要的作用。     

系统性红斑狼疮患者补体C1qAg、C1qAb检测结果分析

目的研究补体C1qAg及C1qAb与系统性红斑狼疮(SLE)的相关性及二者作为临床诊疗指标的可能性。方法选择SLE患者56例(SLE组),其中狼疮性胃炎(LN)23例、非LN 33例,另择其他自身免疫性疾病患者58例作为疾病对照组、40例健康查体者作为正常对照组。采用酶联免疫吸附法检测各组血清补体C1qAg及C1qAb含量。结果 SLE组血清C1qAg含量显著低于疾病对照组和正常对照组,尤以LN患者血清C1qAg含量降低明显;SLE组血清C1qAb含量明显高于疾病对照组和正常对照组,尤以LN患者血清C1qAb含量增高明显。结论血清C1qAg、C1qAb含量与SLE发生及SLE的肾脏损害显著相关,可作为一种诊疗观察指标用于临床。     

血清抗C1q抗体与狼疮肾炎活动性及病理改变的相关性

目的 探讨血清抗C1q抗体与狼疮肾炎(LN)肾组织病理改变的相关性,以及对LN的活动性的评价.方法 用酶联免疫吸附法(ELISA)检测活动期LN患者60例和非LN患者60例血清中的抗C1q抗体,分析这一抗体与LN肾组织病理改变、活动指数及其他实验室参数的相关性.结果 LN患者血清抗C1q抗体水平(89±26)U/ml较非LN患者(57±23)U/ml高(P＜0.01);60例LN患者有同期肾活检病理资料,按世界卫生组织(WHO)分型,Ⅱ型12例,Ⅲ型14例,Ⅳ型18例,Ⅴ型16例.经方差分析显示,各病理类型问抗C1q抗体水平差异有统计学意义,其中以Ⅳ型LN的抗C1q抗体水平显著高于其他病理类型(P＜0.01);C1q在肾组织的沉积与血清抗C1q抗体水平相关;血清抗C1q抗体水平与肾脏病变的活动指数(AI)及尿蛋白含量呈正相关(P＜0.01),与补体C3、C4水平呈负相关(P＜0.01);抗双链DNA(dsDNA)抗体阳性的SLE患者,血清抗C1q抗体水平高于抗dsDNA抗体阴性者(P＜0.01).结论 血清抗C1q抗体水平在一定程度上反映LN肾脏的病理改变,并与肾脏病变活动指数有相关性,检测血清抗C1q抗体对评价LN病情及指导治疗有临床实用价值.     

抗C1q抗体与系统性红斑狼疮疾病活动及狼疮肾炎的关系

目的研究抗C1q抗体与系统性红斑狼疮（systemic lupus erythematosus,SLE）疾病活动及肾损害的相关性。方法使用ELISA法测定93例初诊SLE患者和69例其他风湿性疾病患者及32名健康对照者血清中抗C1q抗体的浓度。同时记录SLE疾病活动指数（systemic lupus erythematosus Disease Activity Index,SLEDAI）、自身抗体和相关实验室指标。结果血清抗C1q抗体、抗dsDNA抗体、抗核小体抗体（anti-nucleosome antibodies,AnuA）,SLE组的阳性率分别为40.9%、62.4%和62.8%。血清抗C1q抗体阳性组患者的肾损害发生率（84.2%）明显高于阴性组（23.6%）。狼疮肾炎（lupus nephritis,LN）患者血清抗C1q抗体浓度（55.36±51.96）RU/ml及阳性率（71.1%）显著高于无肾炎表现的狼疮对照组（12.09±14.46）RU/ml,12.5%。无论患者有无肾损害,狼疮疾病活动患者抗C1q抗体浓度（62.46±50.29）RU/ml及阳性率（85.7%）显著高于疾病稳定的狼疮对照组（8.79±6.42）RU/ml,3.9%。而AnuA和抗dsDNA抗体只在伴有狼疮肾损害的疾病活动组即活动LN的阳性率（87.9%与50.0%）显著高于非活动LN对照组（66.7%与33.3%）。LN组抗C1q抗体、AnuA、抗dsDNA和抗Sm（Smith）抗体阳性率显著高于非LN组（71.1%与12.5%）,（77.8%与47.9%）,（57.8%与25.0%）,（31.1%与10.4%）。SLE疾病活动组抗C1q抗体、AnuA、抗dsDNA阳性率显著高于疾病稳定组（85.7%与3.9%）,（88.1%与41.2%）,（61.9%与17.6%）。活动LN抗C1q抗体、AnuA、抗dsDNA阳性率显著高于非活动LN（93.9%与8.3%）,（87.9%与50.0%）,（66.7%与33.3%）。活动LN组抗C1q抗体、AnuA、抗dsDNA及抗中性粒细胞胞质抗体（ANCA）阳性率显著高于其他SLE组（93.9%与13.1%）,（87.9%与48.3%）,（66.7%与26.7%）,（43.5%与8.5%）。结论血清抗C1q抗体能够反映SLE的疾病活动,并与SLE肾损害相关,是对活动性LN敏感的自身抗体。     

血清C1q抗体水平与系统性红斑狼疮活动性和狼疮肾炎的关系

目的分析探讨血清C1q抗体水平与系统性红斑狼疮（SLE）活动性以及狼疮肾炎之间的关系。方法采用ELISA方法检测92例SLE患者C1q抗体水平。并与其他SLE活动性指标进行相关分析。结果SLE患者C1q抗体阳性率为67.4%。活动性狼疮组的C1q抗体阳性率及C1q抗体水平显著高于非活动性狼疮组（P〈0.001）。活动性狼疮肾炎组C1q抗体阳性率（P〈0.05）和C1q抗体水平（P〈0.01）显著高于非活动性狼疮肾炎组。联合抗dsDNA抗体检测,没有1例活动性狼疮肾炎患者的C1q抗体和抗dsDNA抗体同时阴性。结论血清C1q抗体与狼疮活动以及活动性狼疮肾炎关系密切,C1q抗体的检测有助于活动性狼疮的诊断,联合抗dsDNA抗体的检测是活动性狼疮肾炎的特异性检测指标。     

抗核小体抗体与抗C1q抗体在狼疮肾炎血清的表达及其临床意义

目的探讨抗核小体抗体与抗C1q抗体在狼疮肾炎（lupus nephritis，LN）患者血清的表达及其临床意义。方法使用酶联免疫吸附试验（ELISA）对46例LN患者血清进行检测，并与31例无肾炎临床表现的SLE患者作对照。结果LN患者血清中抗核小体抗体与抗C1q抗体浓度及阳性率显著高于SLE对照组（P〈0．01）。抗双链DNA（dsDNA）抗体、抗Sm抗体、抗nRNP抗体、抗心磷脂（aCL）IgG抗体有较高的阳性率，与对照组相比差异有统计学意义（P〈0．05）。将抗核小体抗体、抗C1q抗体、抗dsDNA抗体、抗Sm抗体、抗nRNP抗体和aCLIgG抗体分别引入Logistic回归进行统计分析，结果显示入选的自变量包括抗核小体抗体、抗C1q抗体、抗dsDNA抗体（P〈0．05）。结论在LN患者中，存在着抗核小体抗体、抗C1q抗体的高表达。抗核小体抗体及抗C1q抗体在LN发病中起重要的作用。抗核小体抗体、抗C1q抗体、抗dsDNA抗体是反映SLE患者并发肾脏损害的重要指标，在LN诊断和判定其活动性方面有重要作用。     

系统性红斑狼疮患者血清C1q抗体的检测及临床意义

目的研究C1q抗体与系统性红斑狼疮(SLE)病情活动和脏器损害的相关性,探讨C1q抗体对SLE疗效及预后的影响。方法用酶联免疫吸附试验(ELISA)检测86例活动期SLE患者血清中的C1q抗体,并对全部病例进行随访,以尿蛋白转阴性和病情初步缓解为随访终点,每半个月进行1次终点的评估。结果56例(65%)SLE患者血清C1q抗体阳性,抗体水平(83±39)U/ml;血清C1q抗体浓度与SLEDAI评分、尿蛋白含量以及抗dsDNA抗体滴度呈正相关(P<0.001),与补体C3、C4水平呈负相关(P<0.001);C1q抗体(+)组患者的肾损害发生率明显高于C1q抗体(-)组(P<0.001);C1q抗体浓度和补体C3是影响SLE疗效的独立因素[相关危险度(RR值)0.99,95%可信区间(CI)0.98~0.997,P=0.010和RR值3.18,95%CI1.05~9.65,P=0.041];C1q抗体(+)与C1q抗体(-)的狼疮肾炎患者尿蛋白转阴的时间经Log-rank检验差异有显著性(字2=4.10,P=0.0428)。结论C1q抗体与SLE的发生、发展密切相关。C1q抗体不仅反映SLE病情的活动性,而且对判断脏器损害情况、评价疗效及预后均有重要意义。     

末端补体SC5b-9抗C1q抗体及补体C3 C4在狼疮疾病活动性判定中的价值

目的 探讨末端补体SC5b-9、抗C1q抗体及补体C3和C4在狼疮疾病活动性判定中的价值.方法 采用酶联免疫吸附试验(ELISA)检测系统性红斑狼疮(SLE)组62例、疾病对照组35例和健康对照组35名血清中的末端补体SC5b-9和抗C1q抗体水平,并检测血清中补体C3和C4的水平,并与SLE患者临床表现、病情活动度及狼疮肾炎(LN)的病理分型进行相关性分析.结果 在SLE活动组中末端补体SC5b-9和抗C1q抗体水平均显著高于各对照组(均P<0.05).末端补体SC5b-9和抗C1q抗体与补体C3、C4呈负相关(P<0.05),与SLE疾病活动指数(SLEDAI)呈正相关(P<0.05).联合检测对疾病活动的判断的敏感性和特异性分别为95%和98%.末端补体SC5b-9及抗C1q抗体在狼疮增殖件肾炎中表达明显高于膜性肾炎(均P<0.05).结论 联合检测可提高疾病诊断和活动性判断的特异性和敏感性;末端补体SC5b-9和抗C1q抗体参与了狼疮增殖性肾炎的免疫发病机制.     

末端补体SC5b-9抗C1q抗体及补体C3 C4在狼疮疾病活动性判定中的价值

目的 探讨末端补体SC5b-9、抗C1q抗体及补体C3和C4在狼疮疾病活动性判定中的价值.方法 采用酶联免疫吸附试验(ELISA)检测系统性红斑狼疮(SLE)组62例、疾病对照组35例和健康对照组35名血清中的末端补体SC5b-9和抗C1q抗体水平,并检测血清中补体C3和C4的水平,并与SLE患者临床表现、病情活动度及狼疮肾炎(LN)的病理分型进行相关性分析.结果 在SLE活动组中末端补体SC5b-9和抗C1q抗体水平均显著高于各对照组(均P<0.05).末端补体SC5b-9和抗C1q抗体与补体C3、C4呈负相关(P<0.05),与SLE疾病活动指数(SLEDAI)呈正相关(P<0.05).联合检测对疾病活动的判断的敏感性和特异性分别为95%和98%.末端补体SC5b-9及抗C1q抗体在狼疮增殖件肾炎中表达明显高于膜性肾炎(均P<0.05).结论 联合检测可提高疾病诊断和活动性判断的特异性和敏感性;末端补体SC5b-9和抗C1q抗体参与了狼疮增殖性肾炎的免疫发病机制.     

末端补体SC5b-9抗C1q抗体及补体C3 C4在狼疮疾病活动性判定中的价值

目的 探讨末端补体SC5b-9、抗C1q抗体及补体C3和C4在狼疮疾病活动性判定中的价值.方法 采用酶联免疫吸附试验(ELISA)检测系统性红斑狼疮(SLE)组62例、疾病对照组35例和健康对照组35名血清中的末端补体SC5b-9和抗C1q抗体水平,并检测血清中补体C3和C4的水平,并与SLE患者临床表现、病情活动度及狼疮肾炎(LN)的病理分型进行相关性分析.结果 在SLE活动组中末端补体SC5b-9和抗C1q抗体水平均显著高于各对照组(均P<0.05).末端补体SC5b-9和抗C1q抗体与补体C3、C4呈负相关(P<0.05),与SLE疾病活动指数(SLEDAI)呈正相关(P<0.05).联合检测对疾病活动的判断的敏感性和特异性分别为95%和98%.末端补体SC5b-9及抗C1q抗体在狼疮增殖件肾炎中表达明显高于膜性肾炎(均P<0.05).结论 联合检测可提高疾病诊断和活动性判断的特异性和敏感性;末端补体SC5b-9和抗C1q抗体参与了狼疮增殖性肾炎的免疫发病机制.     

C1q and anti-C1q antibody levels are correlated with disease severity in Chinese pediatric systemic lupus erythematosus

The aim of this study was to measure the level of serum complement lq(Clq) and anti-C1q antibodies (ClqAb) in pediatric systemic lupus erythematosus (PSLE), and then analyze the correlation between the levels of serum Clq and ClqAb with disease activity and kidney damage. We investigated 90 PSLE patients, including 43 patients in active stage and 47 patients in remission. Our results showed that the level of serum Clq of PSLE patients was significantly lower than the level of healthy children and children with other rheumatic diseases. In contrast, the level of ClqAb of PSLE patients was significantly higher than the other groups. The level of serum Clq was negatively correlated with systemic lupus erythematosus (SLE) disease active index (SLEDAI) and the level of ClqAb was positively correlated with SLEDAI and kidney damage. The sensitivity of using ClqAb levels to diagnose PSLE was 95.6% and the specificity was 97.5%. 93.0% SLE patients who had high C1qAb levels also showed kidney damage. Therefore, the levels of C1q and C1qAb in serum reflect the disease severity of SLE. Decreased Clq and increased C1qAb is closely correlated with lupus nephritis (LN) in children and may have diagnosis values for child LN.     

Predictive value of IgG autoantibodies against C1q for nephritis in systemic lupus erythematosus.

OBJECTIVES--Antibodies against C1q (C1qAb) have been demonstrated in the serum of patients with several immune complex diseases. Patients, particularly those with lupus nephritis, were found to have increased serum titres of IgG C1qAb in a cross-sectional analysis. In the present prospective study correlations were sought between serum titres of IgG C1qAb and clinical as well as laboratory parameters of disease activity in patients with systemic lupus erythematosus (SLE). METHODS--Titres of IgG C1qAb in the serum of 68 SLE patients were measured serially during a three year period. At the same time clinical and laboratory parameters of disease activity were assessed. RESULTS--Increased titres of IgG C1qAb were found in the serum of 56% of SLE patients during the study. Significant correlations were found between increased titres of IgG C1qAb and renal involvement. Clinical signs of renal involvement were found to be associated with significant increases of serum titres of IgG C1qAb in the six months preceding this appearance. Fifty per cent of the increases in serum titres of IgG C1qAb were followed by the development of renal involvement. Elevated serum titres of IgG C1qAb were especially related to proliferative forms of glomerulonephritis. Furthermore, significant correlations were found between serum titres of IgG C1qAb and serum levels of immune complexes, levels of complement components, and titres of antibodies to DNA. CONCLUSIONS--The results suggest that IgG C1qAb play a pathogenic role in the development of lupus nephritis and that serial measurement of serum titres of IgG C1qAb is useful in the management of SLE patients.     

IgG autoantibodies against C1q are correlated with nephritis, hypocomplementemia, and dsDNA antibodies in systemic lupus erythematosus

We investigated the association between serum titers of IgG antibodies against C1q (C1qAb) and clinical and laboratory variables of disease activity in systemic lupus erythematosus (SLE). C1qAb were measured by ELISA in serum samples of 88 patients. Thirty patients (34%) had increased C1qAb titers. No correlation between C1qAb titers and a score for general disease activity was found. However, significant positive correlations were found between C1qAb titers and the presence of several clinical and laboratory variables of disease activity. These included nephritis, dermatitis, hypocomplementemia, antibodies against dsDNA, and circulating immune complexes. A negative correlation was found with neurological disease manifestations. The correlations between C1qAb titers and clinical features indicate that the pathogenetic role for C1qAb in certain disease manifestations of SLE deserves further study.     

High levels of antibodies against Clq are associated with disease activity and nephritis but not with other organ manifestations in SLE patients.

OBJECTIVE: Serum concentration of antibodies to C1q (C1qAb) has been reported to be elevated in a high percentage of patients with systemic lupus erythematosus (SLE). The associations of high C1qAb levels with different clinical manifestations and the activity of the disease, however, are not definitely understood. METHODS: We measured the levels of IgG type C1qAb in the sera of 137 patients with SLE using an ELISA method. RESULTS: Serum concentrations of C1qAb were found to be higher (p < 0.0001) in SLE patients than in healthy controls. High titer (> 66 AU/ml) C1qAb was found in 40/137 (29.2%) SLE patients, and 4/192 (2.1%) healthy controls (p < 0.0001). A strong negative correlation (R = -0.4, p < 0.0001) between the age of the patients and the C1qAb titers could be detected. C1qAb levels in clinically active SLE patients significantly (p < 0.0001) exceeded those measured in the sera of patients in the inactive stage of the disease. A significant positive correlation was detected between C1qAb levels and the laboratory activity markers (anti-DNA, low C3 level) of the disease. We found a significant negative correlation between levels of C1qAb and a negative acute phase protein, alpha2-HS-glycoprotein. Renal involvement was present in 11/40 (27.5%) and 11/97 (11%) of the patients with high and low titers of C1qAb, respectively (p = 0.038). The prevalence of other organ manifestations was, however, the same in the patients with or without high titer C1qAb. CONCLUSION: These findings indicate that C1qAb measurement is a useful method for detecting the activity of SLE and predicting renal manifestations, but not other organ involvement in the disease.     

系统性红斑狼疮患者血浆骨桥蛋白水平与疾病活动性及脏器损害的相关性研究

目的 检测系统性红斑狼疮(SLE)患者血浆中骨桥蛋白(OPN)的水平,分析其与SLE活动性及脏器损害间的关系.方法 选择68例SLE患者和36名健康体检者,采用酶联免疫吸附试验(ELISA)检测其血浆中的OPN水平.记录采血时患者的系统性红斑狼疮疾病活动指数(SLEDAI)、实验室指标等.结果 SLE患者OPN血浆水平明显高于正常对照组[(4.5±2.0)ng/ml与(1.6±0.7)ng/ml,P＜0.01 ].SLE疾病活动组高于非活动组[(5.3±2.0)ng/ml与(3.4±1.3)ng/ml,P＜0.01];SLE患者伴有肾脏损害组高于无肾脏损害组[(5.8±2.1)ng/ml与(3.5±1.3)ng/ml,P＜0.01],有肺间质病变、胃肠道病变和心包炎的高于无脏器损害[(4.8±1.2)、(6.3±1.4)、(5.4±2.6)ng/ml与(3.5+1.3)ng/ml,P＜0.05],抗心磷脂抗体阳性患者OPN水平高于抗心磷脂抗体阴性患者[(5.3±2.4)ng/ml与(4.2±1.7)ng/ml,P＜0.05].OPN血浆水平与SLEDAI呈正相关(r=0.523,P＜0.01),与尿蛋白定量(24 h)呈正相关r=0.403,P=0.001),与补体C3呈负相关r=-0.398,P=0.001),与红细胞沉降率(ESR)、抗dsDNA抗体、抗Sm抗体、IgG、IgA、IgM、球蛋白及关节炎等无相关性(P＞0.05) .结论 OPN可能参与SLE的发病,临床上可作为疾病活动及脏器损伤的观察指标.     

系统性红斑狼疮患者血清卵泡抑素样蛋白1表达水平及其临床意义

目的 检测系统性红斑狼疮(SLE)患者血清中卵泡抑素样蛋白1(FSTL1)的水平及FSTL1在狼疮肾炎肾脏组织中的表达,探讨其在SLE疾病中的临床意义.方法 酶联免疫吸附试验(ELISA)法检测54例SLE患者及27名健康对照组血清FSTL1水平.免疫组织化学染色检测狼疮肾炎患者肾脏组织及健康者肾脏组织中FSTL1的表达情况.采用Mann-WhitneyU/检验、t检验、X2检验及Pearson检验进行统计分析.结果 SLE组FSTL1血清水平(26±21) μg/L显著高于健康对照组(12±14) μg/L(P＜0.01);SLE高血压组明显高于非高血压组(P＜0.01);SLE病程≥5年组与病程＜5年组之间差异有统计学意义(P＜0.01);血清FSTL1表达水平与SLE疾病活动指数(SLEDAI)评分(r=0.319,P=0.022)、年龄(r=0.700,P＜0.01)、病程(r=0.513,P＜0.01)、补体C4 (r=0.443,P=0.004)、总胆固醇(r=0.460,P=0.001)呈正相关;与血小板计数(r=-0.422,P=0.001)、抗双链DNA(dsDNA)抗体水平(r=--0.276,P=0.046)呈负相关.FSTL1主要表达在肾小管上皮细胞胞质内.结论 FSTL1在SLE患者血清中明显升高,且与疾病活动性有关.提示FSTL1在SLE发病机制中起一定作用.     

探讨狼疮带试验对系统性红斑狼疮的临床诊断意义

目的　明确狼疮带试验 (LBT)在系统性红斑狼疮 (SLE)诊断中的作用及LBT与狼疮性肾损害的关系。方法　回顾分析 2 0 0例LBT活检结果。结果　LBT在SLE患者中敏感性、特异性分别为 71%和 82 %。LBT阳性预测值和阴性预测值分别为 91%和 5 0 %。LBT与抗核抗体(ANA) ,抗dsDNA抗体对SLE诊断的敏感性相近 (P >0 0 5 )。SLE伴肾损害组LBT阳性率为 86 % ,显著高于SLE不伴肾损害组 (37% ) (P <0 0 5 )。 2 8例肾活检中 ,LBT阳性组弥漫性增生型狼疮肾炎的发生率为 6 9% ,显著高于LBT阴性组 (17% ) (P <0 0 5 )。LBT免疫成分分析发现IgG及C1q阳性与肾损害密切相关。结论　LBT是SLE辅助诊断的敏感和特异的指标 ,而其较高的阳性预测值提示其在SLE疑难病例诊断中有重要价值。LBT与SLE肾损害的发生密切相关。     

末端补体SC5b-9抗C1q抗体及补体C3 C4在狼疮疾病活动性判定中的价值

目的 探讨末端补体SC5b-9、抗C1q抗体及补体C3和C4在狼疮疾病活动性判定中的价值.方法 采用酶联免疫吸附试验(ELISA)检测系统性红斑狼疮(SLE)组62例、疾病对照组35例和健康对照组35名血清中的末端补体SC5b-9和抗C1q抗体水平,并检测血清中补体C3和C4的水平,并与SLE患者临床表现、病情活动度及狼疮肾炎(LN)的病理分型进行相关性分析.结果 在SLE活动组中末端补体SC5b-9和抗C1q抗体水平均显著高于各对照组(均P<0.05).末端补体SC5b-9和抗C1q抗体与补体C3、C4呈负相关(P<0.05),与SLE疾病活动指数(SLEDAI)呈正相关(P<0.05).联合检测对疾病活动的判断的敏感性和特异性分别为95%和98%.末端补体SC5b-9及抗C1q抗体在狼疮增殖件肾炎中表达明显高于膜性肾炎(均P<0.05).结论 联合检测可提高疾病诊断和活动性判断的特异性和敏感性;末端补体SC5b-9和抗C1q抗体参与了狼疮增殖性肾炎的免疫发病机制.