Objective:To explore the difference of lymphocyte subsets in peripheral blood(PB)between aplastic anemia(AA)and hypoplastic myelodysplastic syndrome(hypo-MDS)patients,meanwhile to compare the clinical parameters obtai...Objective:To explore the difference of lymphocyte subsets in peripheral blood(PB)between aplastic anemia(AA)and hypoplastic myelodysplastic syndrome(hypo-MDS)patients,meanwhile to compare the clinical parameters obtained from PB and bone marrow(BM).Methods:The lymphocyte subsets in hypo-MDS(n=25)and.AA(n=33)patients were investigated by flow cytometry.Meanwhile,the differences in PB cell counts,biochemical indicators,BM cell counts and abnormal chromosomes between the two groups were analyzed.Results:The percentage of CD8^(+)T cells in AA group was significantly higher than that in hypo-MDS group(P=0.001),while the percentage of CD4^(+)T cells and the CD4^(+)/CD8^(+)ratio in AA group were obviously lower than those in hypo-MDS group(P=0.015 and 0.001,respectively).Furthermore,the proportion of CD4^(+)and CD8^(+)activated T(TA)cells,and memory Tregs in AA group was distinctly lower than those in hypo-MDS group(P=0.043,0.015 and 0.024,respectively).Nevertheless,the percentage of CD8^(+)naive T(TN)cells in AA patients was remarkably higher(P=0.044).And hypo-MDS patients had declined lymphocyte counts(P=0.025),increased levels of total bilirubin(TBil),lactate dehydrogenase(LDH),vitamin B12 and proportion of BM blasts than AA patients(P=0.019,0.023,0.027 and.0.045,respectively).Conclusion:In this study it was confirmed that the percentages of CD4^(+)and CD8^(+)TA cells,memory Tregs and CD8^(+)TN cells were significantly different between AA and hypo-MDS patients,which provide an essential basis for the identification of these two diseases.展开更多
目的:评估褪黑素在再生障碍性贫血(AA)患者中的表达水平及其对免疫功能的影响。方法:用酶联免疫吸附法测定AA患者血浆褪黑素水平,分析褪黑素水平与实验室指标之间的相关性。在体外,用流式细胞术检测褪黑素对AA患者T细胞的活化、增殖和...目的:评估褪黑素在再生障碍性贫血(AA)患者中的表达水平及其对免疫功能的影响。方法:用酶联免疫吸附法测定AA患者血浆褪黑素水平,分析褪黑素水平与实验室指标之间的相关性。在体外,用流式细胞术检测褪黑素对AA患者T细胞的活化、增殖和凋亡水平的影响。结果:AA患者血浆褪黑素水平较正常对照(HC)显著降低(12.23 pg/ml vs 20.04 pg/ml,P<0.01),而强化免疫抑制治疗后(IST)缓解的AA患者血浆褪黑素水平较未缓解患者明显升高(29.16 pg/ml vs 11.73 pg/ml,P=0.04)。AA患者血浆褪黑素水平与血小板(r=0.49)、网织红细胞绝对值(r=0.45)、中性粒细胞百分比(r=0.43)呈明显正相关,而与外周血淋巴细胞百分比(r=-0.45)呈明显负相关。在体外,褪黑素可抑制AA患者CD4+T和CD8+T细胞上CD25和CD69的表达(均P<0.05)。此外,褪黑素可显著抑制AA患者CD4+T和CD8+T细胞的增殖能力(P=0.01,P<0.01)。结论:AA患者血浆褪黑素水平降低,可能在其免疫异常机制中发挥一定的作用。在体外,补充褪黑素可部分纠正AA患者的免疫亢进状态。展开更多
文摘Objective:To explore the difference of lymphocyte subsets in peripheral blood(PB)between aplastic anemia(AA)and hypoplastic myelodysplastic syndrome(hypo-MDS)patients,meanwhile to compare the clinical parameters obtained from PB and bone marrow(BM).Methods:The lymphocyte subsets in hypo-MDS(n=25)and.AA(n=33)patients were investigated by flow cytometry.Meanwhile,the differences in PB cell counts,biochemical indicators,BM cell counts and abnormal chromosomes between the two groups were analyzed.Results:The percentage of CD8^(+)T cells in AA group was significantly higher than that in hypo-MDS group(P=0.001),while the percentage of CD4^(+)T cells and the CD4^(+)/CD8^(+)ratio in AA group were obviously lower than those in hypo-MDS group(P=0.015 and 0.001,respectively).Furthermore,the proportion of CD4^(+)and CD8^(+)activated T(TA)cells,and memory Tregs in AA group was distinctly lower than those in hypo-MDS group(P=0.043,0.015 and 0.024,respectively).Nevertheless,the percentage of CD8^(+)naive T(TN)cells in AA patients was remarkably higher(P=0.044).And hypo-MDS patients had declined lymphocyte counts(P=0.025),increased levels of total bilirubin(TBil),lactate dehydrogenase(LDH),vitamin B12 and proportion of BM blasts than AA patients(P=0.019,0.023,0.027 and.0.045,respectively).Conclusion:In this study it was confirmed that the percentages of CD4^(+)and CD8^(+)TA cells,memory Tregs and CD8^(+)TN cells were significantly different between AA and hypo-MDS patients,which provide an essential basis for the identification of these two diseases.
文摘目的:评估褪黑素在再生障碍性贫血(AA)患者中的表达水平及其对免疫功能的影响。方法:用酶联免疫吸附法测定AA患者血浆褪黑素水平,分析褪黑素水平与实验室指标之间的相关性。在体外,用流式细胞术检测褪黑素对AA患者T细胞的活化、增殖和凋亡水平的影响。结果:AA患者血浆褪黑素水平较正常对照(HC)显著降低(12.23 pg/ml vs 20.04 pg/ml,P<0.01),而强化免疫抑制治疗后(IST)缓解的AA患者血浆褪黑素水平较未缓解患者明显升高(29.16 pg/ml vs 11.73 pg/ml,P=0.04)。AA患者血浆褪黑素水平与血小板(r=0.49)、网织红细胞绝对值(r=0.45)、中性粒细胞百分比(r=0.43)呈明显正相关,而与外周血淋巴细胞百分比(r=-0.45)呈明显负相关。在体外,褪黑素可抑制AA患者CD4+T和CD8+T细胞上CD25和CD69的表达(均P<0.05)。此外,褪黑素可显著抑制AA患者CD4+T和CD8+T细胞的增殖能力(P=0.01,P<0.01)。结论:AA患者血浆褪黑素水平降低,可能在其免疫异常机制中发挥一定的作用。在体外,补充褪黑素可部分纠正AA患者的免疫亢进状态。
