摘要
目的探讨动脉粥样硬化(As)患者单个核细胞(PBMC)唾液酸黏附素(Sig1ec-1)在刺激白细胞分化抗原(CD)4+和CD8+T淋巴细胞活化增殖中的作用。方法实验研究。用磁珠分离长征医院18例急性冠状动脉综合征(ACS)和41例稳定型心绞痛(sA)患者及32名健康对照者CD14阳性PBMC后,用不同浓度α-干扰素(IFN—α,0、2、5、10ng/m1)刺激Sig1ec-1高表达,或用小干扰RNA或抗Sig1ec-1单抗靶向抑制Sig1ec-1表达,再与1名第三方健康献血者CD4+/CD8+T淋巴细胞共培养5d。然后,将实验分为11组:健康人CD14(1组),健康人CD14+IFN-α 5rig/m1(2组),健康人CD14+IFN-α5ng/m1+anti—Sig1ee-12μg/ml(3组),ACSCD14(4组),ACSCD14+siRNA干扰对照组(Mock,5组),ACSCD14+siRNA67940nmo]/L(6组),ACSCD14+anti—Sig]ee-12μg/m1(7组),SACD14(8组),SACD14+Mock(9组),SACD14+siRNA67940nmo1/L(10组),SACD14+anti—Sig]ec-12μ∥m1(11组);每组测定10份标本。用CCK-8活细胞计数试剂盒检测共培养T淋巴细胞增殖,用ELISA检测共培养T淋巴细胞分泌白细胞介素(IL)-2、IL-10、IL-12、1干扰素(IFN-γ)。测定各组PBMC刺激T淋巴细胞分泌细胞因子的计量数据用中位数(四分位数)表示,采用非参数秩和检验。结果靶向阻断Sig1ee一1后(6组),PBMC刺激CD4+T淋巴细胞及CD8+T淋巴细胞的增殖能力减弱,PBMC刺激CD4+T淋巴细胞分泌IL-2、IL-12、IFN-γ分别为67.00(62.50~87.30)、0.86(0~1.63)、47.82(37.60~56.67)pg/m1,且分泌能力减弱;IL-10为56.00(46.25~67.40)pg/m1,且分泌能力增强;未处理组(4组)上述细胞因子分别为213.70(187.50~275.30)、6.87(4.90~8.93)、114.90(89.50~167.40)、21.08(15.70~33.20)pg/m1,二者差异有统计学意义(U值分别为8.50、17.00、8.50、87.50,P均〈0.05)。当健康对照组单核细胞经IFN—α刺激上调Siglec-1表达后(2组),刺激CD4+T淋巴细胞分泌IL-2、IL-12、IFN-γ分别为220.44(174.30~312.30)、7.90(6.540~10.40)、143.75(78.20~210.00)pg/m1,且能力增强;IL-10为21.95(16.30~25.00)pg/m1,而能力减弱,与1组比较,差异有统计学意义(U值分别为89.50、98.00、100.00、0,P均〈0.05)。抑制或增强Sig1ee-1对CD8+T淋巴细胞分泌的上述细胞因子无影响(P均〉0.05)。结论IFN-α可刺激Sig1ee-1表达增加,Sig1ec-1可通过促进CD4+/CD8+T淋巴细胞增殖或CD4+T淋巴细胞分泌Th1型细胞因子参与AS发病过程。
Objective To investigate the role of atherosclerotic monocytes Siglec-1 in stimulating CIM + and CD8 + T lymphocytes proliferation and activation. Methods Experimental research. Cluster of differentiation antigen 14 (CD14) positive monocytes of 18 acute coronary syndrome (ACS), 41 stable angina (SA) and 32 healthy volunteers were separated by magnetic-activated cell sorting. Different concentration of interferon-α(IFN-α, 0, 2, 5, 10 ng/ml) were used to up-regulate Siglec-1 and small interfering RNA (siRNA) or blocking antibody were used to down-regulate Siglec-1. Then monocytes were cocuhured with CD4 + T/CD8 + T cells from a third healthy volunteer for 5 days. The experiment was designed for 11 groups (n = 10 for each group) , that was (1) normal CD14, (2) normal CD14 + IFN-α 5 ng/ml, (3) normal CD14 + IFN-α 5 ng/ml + anti-Siglec-1 2 μg/ml, (4) ACS CD14, (5) ACS CD14 + control siRNA group (Mock) , (6) ACS CD14 + siRNA 679 40 nmol/L, (7) ACS CD14 + anti-Siglee-1 2 μg/ml, (8) SA CD14, (9) SA CD14 +Moek, (10) SA CD14 + siRNA 679 40 nmol/L and ( 11 ) SA CD14 + anti- Siglec-1 2 μg/ml. Cell Counting Kit-8 (CCK-8) was used to determine T cells proliferation and ELISA was used to deteet Interleukin-2 ( IL-2), IL-10, IL-12 and IFN-γ of culture supernatant. Data of eytokines detection were expressed as medium (quartiles) and analyzed by nonparametric rank sum test. Results By the blockage of Siglee-1 (group 6) , the proliferation of CD4 and CD8 were decreased. Seeretion of IL-2, IL-12 and IFN-'y by CD4 eells [67.00(62. 50-87.30), 0. 86(0-1.63), and 47.82(37.60-56. 67) pg/ml, respeetively] were deereased and IL-10 [56. 00(46. 25-67.40) pg/ml] was increased compared with those in control group [ group 4, 213.70 ( 187.50-275.30 ) , 6. 87 (4. 90-8.93 ) , 114. 90 ( 89. 50-167.40 ), and 21.08 (15.70-33.20) pg/ml, respectively, with U -- 8.50, 17. 00, 8.50, and 87.50, respectively, all P 〈 0. 051. When monocytes Siglec-1 from control group was up-regulated by IFN-α( group 2 ) , seeretion of IL-2, IL-12 and IFN-γ [220. 44( 174. 30-312. 30), 7.90(6. 540-10. 40) and 143.75(78. 20-210. 00) pg/ml, respectively] were increased and IL-10 [ 21.95 ( 16. 30-25.00) pg/ml ] was deereased( eompared with group 1, with U = 89.50, 98.00, 100. 00, and 0, respeetively, all P 〈 0. 05 ). Regulation of Siglec-1 had no role in eytokines produetion in cocultured CD8 + T eells( all P 〉 0. 05 ). Conclusions IFN-ot can up- regulate monocytes Siglee-1. Siglec-1 may partieipate in the pathogenesis of AS via promoting proliferation of CD4 +/CD8 +T cells and Thl eytokines secretion of CD4 + T cells.
出处
《中华检验医学杂志》
CAS
CSCD
北大核心
2013年第5期414-419,共6页
Chinese Journal of Laboratory Medicine
基金
国家高技术研究发展计划(863计划)资助项目(2006AA022496)
国家自然科学基金资助项目(81072479、81170263)
上海市科学技术委员会优秀学科带头人基金资助课题(07XD14013)
成都军区总医院院管课题资助项目(2011YG-C05)