抗乙酰胆碱3受体抗体在原发性干燥综合征中的临床意义

目的 探讨抗乙酰胆碱3(M3)受体抗体在原发性干燥综合征(pSS)中的临床意义.方法 用ELISA和Western blot检测pSS患者(70例)、系统性红斑狼疮(SLE)患者(50例)、健康对照者(76例)血清中抗M3受体抗体,并测所有受试者的泪液流率、泪膜破碎时间、角结膜染色评分、5 min唾液流量、灶性指数、类风湿因子、IgG等.结果 ELISA和Western blot检测抗M3受体抗体阳性率pSS患者为47.14%、60.00%,SLE患者为4.00%、12.00%,健康对照者为14.47%、15.79%.抗M3受体抗体阳性者的泪液流率、泪膜破碎时间、5 min唾液流量低于阴性者,角结膜染色评分高于阴性者,但差异无统计学意义.抗M3受体抗体阳性者灶性指数>3的患者多于阴性者(P<0.05).抗M3受体抗体阳性者IgG、类风湿因子水平明显高于阴性者(P<0.05).结论 pSS患者抗M3受体抗体检出率明显高于SLE患者和健康对照者,抗M3受体抗体阳性者唇腺损伤较重.

The clinical significance of autoantibodies against acetylcholine muscarinic 3 receptor in primary Sj(o)gren's Syndrome

Objective To detect anti-M3 receptor antibodies in primary Sj(o)gren's syndrome(pSS)patients and to explore its association with clinical manifestations.Methods Anti-M3 antibodies were tested in 70 patients with pSS,50 patients with systemic lupus erythematosus(SLE)and 76 normal controls with ELISA and Western blot.The correlation between anti-M3 antibodies and other clinical manifestations was analyzed.Results (1)The positive rate of anti-M3 antibodies in pSS Was 47.14% using ELISA and 60.00% using Western blot in SLE 4.00% using ELISA and 12.00% using Western blot and in normal controls 14.47% using ELISA and 15.79% using Western blot.(2)The incidence of sehirmer test,tear break-up time(BUT),whole saliva flow rate,punctate epithelial erosions(PEE)on the corneas and external eye examination were not significantly different between the anti-M3 positive and negative groups.(3)The incidences of IgG,rheumatoid factor,SSB and fluorescence index(FI)＞3 were higher in the positive group than in the negative group using EUSA.Conclusion The positive rate of anti-M3 antibodies is higher in pSS than in SLE and normal controls and in some degree it has correlation with the lesion in salivary gland.