ABSTRACT
Objective To detect the levels of IL-9,IL-17,and IFN-γ in CD4+T cells from patients with rheumatoid arthritis (RA).Methods The peripheral blood mononuclear cells (PBMCs) from patients with RA and healthy controls were obtained,then the CD4+ T lymphocytes were tested by immunomagnetic beads.The protein levels of IL-9,IFN-γ and IL-17 were measured by flow cytometry (FCM).The mRNA levels of IL-9,IL-17,RORγt and IFN-γwere also detected by qRT-PCR.Data were analyzed by comparison between groups using variance analysis,and Pearson's correlation analysis was used for linear correlation analysis.Results The isolation of untouched human CD4+ T cells from PBMC was effective and its purity was over 90％.The protein levels of IL-9,IL-17,IFN-γwere higher in patients with active RA as compared with patients with inactive RA (P＜0.01) which were (1.62±0.23)％ vs (1.15±0.24)％(P＜0.01),(1.47±0.20)％ vs (1.04±0.26)％(P＜0.01) and (8.1±0.6)％ vs (6.9±1.0)％(P＜0.01) respectively,so did the patients with RA when compared with healthy controls (P＜0.01).The mRNA levels of IL-9,IL-17,RORγt and IFN-γ were higher in patients with active RA as compared with inactive RA patients (P＜0.01),which were (3.0±0.6) vs (1.8±0.4) (p＜0.01) (4.2±0.9)vs (2.3±0.7) (P＜0.01),(4.1±0.7)vs (2.9±0.3) (P＜0.01)and (4.0±0.8)vs (2.3±0.6) (P＜0.01) respectively,so did the patients with RA when compared with healthy controls (P＜0.01).Intracelluar IL-9 levels were positively correlated with IL-17 (r=0.632,P=0.001),IFN-γ (r=0.515,P=0.008),DAS28 (r=0.519,P=0.009) and ESR (r=0.857,P=0.038) but had no correlation with CRP (r=0.38,P=0.61).Conclusion The levels of IL-17,IL-9,IFN-γare higher in the PBMCs of RA patients,and these cytokines may participate in the pathogenesis of RA.
ABSTRACT
ObjectiveTo investigate the profile of Th17/Treg balance in the peripheral blood of patients with systemic lupus erythematosus (SLE).MethodsThirty-two SLE patients in active disease were selected and 30 SLE patients in remission were included in this study.The control group was consisted of 25healthy individuals.The expressions of IL-17 and FoxP3 on CD4+ T cells in the peripheral blood were assessed by flow cytometry and the mRNA levels of these two cytokines were examined by quantitative PCR respectively.ANOVA was used for statistical analysis.ResultsThe percentage of CD4+IL-17+ T cells and IL-17mRNA expression of the active group were significantly higher than those of the remission group and control group[(l.0l±0.22)％,(2.04±0.63)vs (0.48±0.16)％,(1.12±0.34) vs (0.41±0.12)％,1; P＜0.01].There was no difference between the remission group and control group(P＞0.05).However,the percentage of CI4+FoxP3 + T cells and FoxP3 mRNA expression of the active group were significantly lower than those of the remission group and control group [(2.36±t0.54)％,(0.42±0.16) vs (4.34±0.95)％,(0.87±t0.28) vs (5.09±11.17)％,1; P＜0.01 ],and there was also significant differencesbetween the remission group and control group(P＜0.05).ConclusionThl7/Treg balance shift may exist in the peripheral blood of patients with SLE and the degree of imbalance may be related to disease activity of SLE.
ABSTRACT
Anaerobic threshold (AT) and maximal oxygen uptake (Vo_2max) were determined according to ventilation and gas exchange measurements during graded cycling in 26 athletes and were compared with cardiac condition and function measured by 2-dimensional echocardiography exercise test in corresponding with HR at and above AT. There are significant correlations between Dd and VO_2max and between cardiac function (such as SV, CO, UMO and so on) and VO_2, but the correlations are higher in the same than in different subjects of the same HR. It suggests that the physiological individualities including cardiac function and other peripheral factors are so different that the VO_2max, AT, cardiac condition and function should be measured respectively to evaluate aerobic capabilities of each athlete, thus guiding the training and selection of athletes.