枯燥综合征球蛋白高 枯燥综合征患者血清β—2微球蛋白水平与本身抗体及体系劳累的联系
王晓东
[摘要] 意图 研讨枯燥综合征患者血清β-2微球蛋白水平与本身抗体发作、腺外劳累的相关性。 办法 对167例枯燥综合征患者的β-2微球蛋白水平、本身抗体进行检测,点评其腺外劳累状况,对本身抗体阳性组和阴性组的β-2微球蛋白水平,有腺外体现组和无腺外体现组的β-2微球蛋白水平选用方差剖析等办法进行统计学比较。成果 抗SS-A、抗SS-B抗体阳性组和独自抗SS-A阳性及全阴性的β-2微球蛋白水平分别为(2.46±0.90)mg/L、(1.81±0.90)mg/L和(1.45±0.61)mg/L,差异有统计学含义(P<0.05);有腺外劳累组和无腺外劳累组的β-2微球蛋白水平分别是(2.42±0.91)mg/L和(1.71±0.83)mg/L,差异有统计学含义(P<0.05)。 定论 β-2微球蛋白与本身抗体和体系劳累相关,能够作为枯燥综合征的一个有用的活动性目标。
[关键词] 枯燥综合征; β-2 微球蛋白; 本身抗体; 腺外劳累
[中图分类号] R442.8 [文献标识码] A [文章编号] 1673-9701(2017)21-0007-03
The relationship between serum β-2 microglobulin levels and autoantibodies and systemic involvement in patients with Sjogren's syndrome
WANG Xiaodong
Department of Rheumatology, Ningbo Medical Center Li Huili Hospital, Ningbo 315040, China
[Abstract] Objective To study the correlation between serum β-2 microglobulin levels and autoantibody production and extraglandular involvement in patients with Sjogren's syndrome. Methods The levels of β-2 microglobulin and autoantibodies were measured in 167 patients with Sjogren's syndrome.The incidence of extrahepatic involvement was assessed. The levels of β-2 microglobulin in the autoantibody positive group, negative group, extraglandular manifestations group and non-glandular manifestations group were statistically analyzed by methods such as variance analysis. Results The levels of β-2 microglobulin in anti-SS-A, anti-SS-B antibody positive group, anti-SS-A positive group and all-negative group were(2.46±0.90) mg/L,(1.81±0.90) mg/L and(1.45±0.61) mg/L, and the differences were significant. The levels of β-2 microglobulin in extraglandular involvement group and non-extraglandular involvement group were(2.42±0.91)mg/L and (1.71±0.83)mg/L, and the differences were significant(P<0.05). Conclusion β-2 microglobulin is associated with autoantibody and systemic involvement and can serve as a useful activity indicator for Sjogren's syndrome.
[Key words] Sjogren's syndrome; β-2 microglobulin; Autoantibody; Extraglandular involvement
枯燥综合征是一种以外排泄腺高度淋巴细胞滋润为特征的本身免疫性疾病,其免疫性炎症反响首要发作于外排泄腺的上皮细胞。多克隆的B细胞活化和本身抗体发作是疾病的首要标志[1]。除了累及泪腺、唾液腺引起口眼枯燥外,还可累及肝、肾、肺等内脏器官及血管、神经、关节、肌肉、皮肤等;这些腺外体现的发作和本身抗体的发作及本身免疫性B细胞的高活动性有关。在既往的研讨中,枯燥综合征患者的血清、唾液和淚液中的β-2微球蛋白水平升高[2-4],可作为B细胞活化标志用于判别疾病活动度[5,6]。因而,咱们检测了167例枯燥综合征患者的血清β-2微球蛋白浓度,并剖析了其与本身抗体发作和腺体外劳累的联系。
1材料与办法
1.1一般材料
选取2010年10月~2015年10月在我院临床风湿免疫科住院并被确诊的枯燥综合征病例167例,男6例,女161例,平均年龄(54.5±12.5)岁,一切患者均契合2002年美国欧盟联合(AECG) 枯燥综合征分类规范或2012年美国风湿病学会(ACR)枯燥综合征的分类规范,扫除颈、头面部放疗史及丙型肝炎病毒感染、获得性免疫缺点病、结节病、淀粉样变性、移植物抗宿主病、IgG4相关疾病等,扫除肾功用不全患者,扫除多发性骨髓瘤、淋巴瘤病史者。
1.2 查验办法
抗核抗体(ANA):运用直接免疫荧光法检测抗核抗体,运用免疫印迹法检测抗SS-A抗体、抗SS-B抗体。在167例患者中,独自抗SS-A阳性51例,一起有抗SS-B抗体阳性55例,独自抗SS-B阳性0例。β-2微球蛋白:β-2微球蛋白检测用免疫比浊法,>2.4即为增高。
1.3调查目标及点评规范
点评一切患者的腺外体现,腺外体现包含紫癜、肺和神经危害、滑膜炎、肌炎、血管炎、淋巴结肿大,不包含雷诺综合征。调查本身抗体阳性组和阴性组的β-2微球蛋白水平并进行比较;调查有腺外体现组和无腺外体现组的β-2微球蛋白水平并进行比较。
1.4 统计学办法
运用SPSS 17.0统计学软件剖析数据,计量材料用均数±规范差(x±s)标明,各组间比较选用方差剖析或两样本t查验,P<0.05为差异有统计学含义。
2成果
2.1 抗SS-A、抗SS-B抗体阳性和独自抗SS-A阳性及全阴性的β-2微球蛋白水平比较
抗SS-A、抗SS-B抗体阳性患者的β-2微球蛋白水平显着高于独自抗SS-A阳性及全阴性的患者,三者进行方差剖析,标明三组之间差异有统计学含义(P<0.05)。见表1。
2.2 有腺外劳累组和无腺外劳累组的β-2微球蛋白水平比较
有腺外劳累组的β-2微球蛋白水平显着高于无腺外劳累组,两组差异有统计学含义(P<0.05)。见表2。
2.3 腺外体现汇总
在167例患者中,67例患者存在腺外体现,其间,25例患者呈现关节炎或关节痛,18例患者经过胸部CT及肺功用查看发现肺间质病变,15例患者呈现神经危害,以下肢周围神经病变最常见,体现为肢体麻痹、肢体痛苦等,12例患者呈现皮肤紫癜,1例患者呈现下肢皮肤溃疡,4例患者呈现肌炎,体现为肌痛及肌无力,伴有肌酸肌酶升高,还有3例患者呈现多发淋巴结肿大。9例患者一起呈现两种或两种以上的腺外体现。
3评论
β-2微球蛋白是一种分子量为11800的蛋白质,坐落一切有核细胞的细胞膜上,是人白细胞抗原(HLA)的轻链蛋白[7]。在健康人中β-2微球蛋白以相对安稳的速率组成,在细胞再生进程中被开释并进入体液中。因为淋巴体系是β-2微球蛋白的首要组成场所,因而在一些淋巴细胞增殖性疾病中可呈现血清β-2微球蛋白升高,尤其是多发性骨髓瘤、淋巴瘤、缓慢淋巴细胞性白血病[3],有上述病史的患者被扫除在本研讨之外。
β-2微球蛋白的首要排泄部位是肾脏,β-2微球蛋白能够自在经过肾小球基底膜,在远端肾小管再吸收,代谢分解为氨基酸;肾小球滤过率的下降延伸β-2微球蛋白的半衰期,使血清浓度成倍增加。一般来讲,在肾小球滤过率下降至(60~80)mL/min,血清β-2微球蛋白浓度就会超越参考值上限[8]。因而,一切存在肾脏反常、肾功用不全的患者都被本研讨扫除在外。
一些免疫应对显着激活的疾病,如本身免疫病也能够呈现血清β-2微球蛋白水平升高。枯燥綜合征是一种以B淋巴细胞活化为首要特征的本身免疫病,已被证真实部分患者傍边存在血清β-2微球蛋白的显着升高。β-2微球蛋白在枯燥综合征及其他一些本身免疫病中的效果仍不彻底清楚,β-2微球蛋白能够与HLA重链以非共价键衔接,参加保持三级结构,而且参加抗原提呈的进程[9]。此外,β-2微球蛋白或许具有起动炎症反响、诱导凋亡的功用[10-12],β-2微球蛋白还可被抗原提呈细胞用来协助加工本身抗原如SS-A、SS-B[13]。但是,更大的或许是β-2微球蛋白仅仅免疫活化的非特异性标志物,其水平升高反响免疫反映的全体活化程度。
枯燥综合征患者存在显着的B细胞多克隆性增殖[14-16],由此发作很多的本身抗体,其间抗SS-A、抗SS-B本身抗体是枯燥综合征的相对特异性本身抗体,这些本身抗体参加了枯燥综合征的发病。现在发现,枯燥综合征患者的唾液腺、凋亡上皮细胞上存在Ro/La等本身抗原,一起发现在枯燥综合征患者的唾液腺中存在抗Ro/SSA和抗La/SSB细胞及抗SS-A、抗SS-B抗体的局限性排泄[17];因而,抗SS-A、抗SS-B抗体在必定程度上反映了枯燥综合征患者外排泄腺上的本身免疫反响。既往的研讨证明,抗SS-A和抗SS-B抗体阳性的患者在唇腺活检中更简单发现生发中心样结构[17],提示存在更显着的淋巴细胞增生,导致更高的β-2微球蛋白水平。在本研讨中,本身抗体阳性的枯燥综合征患者,其血清β-2微球蛋白水平与本身抗体阴性组比较有显着差异,也证明了这一点。
枯燥综合征除累及泪腺、唾液腺等外排泄腺体,尚可累及肝、肾、肺等内脏器官及血管、关节、皮肤等,在这些脏器之中,也可呈现类似于外排泄腺中的淋巴细胞滋润体现,与多克隆B细胞激活和淋巴细胞增生密切相关。此外,因为反常免疫反响形成的器官危害,致使过多的有核细胞损坏和抗原裂解,结合于细胞外表的β-2微球蛋白向血清中开释增多。这些要素一起导致了血清中β-2微球蛋白浓度增高。既往研讨发现β-2微球蛋白与枯燥综合征腺外体现相关,可作为反映枯燥综合征疾病活动性的独立猜测因子[18]。本研讨中,伴有腺外危害的枯燥综合征患者β-2微球蛋白水平高于单纯腺体劳累者,差异有显着性,故咱们以为β-2微球蛋白水平可作为反映腺外劳累状况的目标。
枯燥综合征虽然是一预后较好的本身免疫病,但其临床体现多变,假如呈现体系性危害而未经恰当医治,则预后不良;而β-2微球蛋白水平能够反映包含B淋巴细胞在内的各种免疫细胞的活动性,有助于猜测腺外危害状况和点评疾病活动度,然后辅导医治,到达改进预后的意图[19,20]。
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(收稿日期:2017-02-24)
