Objective To investigate various types and quantities of fetal cells getting into peripheral blood of pregnant women and immune status related to pregnancy induced hypertension syndrome (PIH) and analyze the etiology of PIH.Methods (1) Three markers of fetal nucleated red blood cells (fNRBCs) in normal pregnant women(n=43)and PIH patients (n=39)were measured by flow cytometry: CD71,HbF/iAg and HbF/CA.(2)We detected the levels of sub-groups of lymphocytes and some plasma cytokines.such as TNF-α and IL-6.The blood samples were from normal pregnant subjects and patients of PIH.Results In the peripheral blood of patients of PIH and normal pregnant subjects,(1) The quantities of fetal cells using three different methods in PIH [6.56(11.37)%、0.09(0.16)%、0.06(0.11)%]were significantly different from normal pregnant subjects[1.58(3.35)%、0.04(0.08)%、0.02(0.06)%],Z= -5.31,-2.97,-4.13 respectively,P＜0.01.(2)Except CD8,the levels of CD3 (76.4±8.5)%,CD4(42.6±6.4)%,CD4/CD8(1.5±0.4)%,CD19(10.5±3.9)%,CD16/CD56 (12.2±7.7)%,TNF-α (1.4 ±0.6)μg/L and IL-6(89.6±12.9)μg/L in PIH were significantly different from normal pregnant subjects[CD3(70.4±8.3)%,CD4(35.3±6.9)%,CD4/CD8(1.2±0.4)%,CD19(8.2±2.8)%,CD16/CD56(20.5±8.9)%,TNF-α(0.5±0.2)μg/L and IL-6(22.0±5.7)μg/L,respectively,P＜0.001].There were no significant differences observed in the level of CD8(P＞0.05).Conclusion The increment of fNRBCs getting into peripheral blood of pregnant women and associated immune status were implicated in the development of PIH.

Objective:To investigate the rates of low disease activity and clinical remission in patients with systemic lupus erythematosus(SLE)in a real-world setting,and to analyze the related factors of low disease activity and clinical remission.Methods:One thousand patients with SLE were enrolled from 11 teaching hospitals.Demographic,clinical and laboratory data,as well as treatment regimes were collec-ted by self-completed questionnaire.The rates of low disease activity and remission were calculated based on the lupus low disease activity state(LLDAS)and definitions of remission in SLE(DORIS).Charac-teristics of patients with LLDAS and DORIS were analyzed.Multivariate Logistic regression analysis was used to evaluate the related factors of LLDAS and DORIS remission.Results:20.7％of patients met the criteria of LLDAS,while 10.4％of patients achieved remission defined by DORIS.Patients who met LLDAS or DORIS remission had significantly higher proportion of patients with high income and longer disease duration,compared with non-remission group.Moreover,the rates of anemia,creatinine eleva-tion,increased erythrocyte sedimentation rate(ESR)and hypoalbuminemia was significantly lower in the LLDAS or DORIS group than in the non-remission group.Patients who received hydroxychloroquine for more than 12 months or immunosuppressant therapy for no less than 6 months earned higher rates of LLDAS and DORIS remission.The results of Logistic regression analysis showed that increased ESR,positive anti-dsDNA antibodies,low level of complement(C3 and C4),proteinuria,low household in-come were negatively related with LLDAS and DORIS remission.However,hydroxychloroquine usage for longer than 12 months were positively related with LLDAS and DORIS remission.Conclusion:LLDAS and DORIS remission of SLE patients remain to be improved.Treatment-to-target strategy and standar-dized application of hydroxychloroquine and immunosuppressants in SLE are recommended.