人外周血耐受性树突状细胞的诱导培养及其DC-STAMP的表达研究

目的:诱导培养人外周血耐受性树突状细胞(TolDCs)并动态观察TolDCs诱导过程树突状细胞-特异性跨膜蛋白(DC-STAMP) mRNA的表达水平.方法:(1)免疫磁珠分选法获得人外周血CD14+单核细胞,采用细胞因子GM-CSF、白介素4(IL-4)、地塞米松和LPS联合培养诱导TolDCs;(2)观察培养细胞的形态变化,流式细胞术检测CD83、CD86和CD14的表达,并将培养的细胞与T淋巴细胞共培养观察T淋巴细胞增殖反应;(3)采用实时定量PCR对TolDCs诱导培养过程中DC-STAMP mRNA表达水平进行动态观察.结果:(1) CD14+单核细胞GM-CSF、IL-4、脂多糖诱导培养后胞体变大,出现树枝状突起,为典型的成熟DCs形态,加地塞米松诱导培养后胞体亦变大,但未见明显树枝状突起,缺乏典型的成熟DCs形态;(2)CD14+单核细胞经GM-CSF、IL-4培养后使CD83和CD86表达上调,CD14表达下调,加Dex联合诱导培养后DCs表面CD83、CD86表达下调,CD14表达上调,与T淋巴细胞共培养后增殖反应明显减弱,显示TolDCs的免疫表型和功能特性;(3) CD14+单核细胞经GM-CSF、IL-4培养后DC-STAMP mRNA的表达水平随培养时间延长而降低,加入地塞米松联合诱导后表达水平明显增加.结论:人外周血CD14+单核细胞采用GM-CSF、IL-4和地塞米松联合培养可诱导TolDCs生成,DC-STAMP可能与DCs的致耐受功能有关.     

钙动员诱导人外周血单核细胞分化为树突状细胞的信号转导

目的初步探讨钙离子载体（CI）在体外迅速诱导人外周血单核细胞（PBMC）分化为树突状细胞（DC）的信号转导途径。方法分离健康献血者的PBMC,在体外用人重组粒／巨噬细胞集落刺激因子（rhGM-CSF）和CI培养40h或rhGM-CSF和TNF-α培养5d,部分PBMC用环胞菌素A（CsA）预处理30min后,再加入CI或TNF-α;相差显微镜下观察细胞的形态;流式细胞仪检测细胞表面CD14、CD80、CD86、CD83、HLS-DR等分子的表达;MTT比色法检测其对同种异体T淋巴细胞的刺激增殖作用;凝胶电泳迁移率变动分析（EMSA）检测不同方法培养的细胞其核转录因子-κB（NF-κB）的活化水平。结果健康献血者的PBMC经rhGM-CSF与CI培养40h或rhGM-CSF与TNF-α培养5d,均可获得DC的典型形态和表面分子的表达,包括CD14表达下调,CD80、CD86及HLA-DR等分子表达的上调,以及较强刺激同种异体T淋巴细胞增殖的作用;其中CI诱导的DC其CD80、CD86、CD83、HLA-DR等分子的上调更明显,刺激T淋巴细胞的增殖能力更强。经TNF-α及CI所诱导分化的DC均具有较好的NF-κB活性。但经CI诱导的DC,其形态、表面标志物、对T淋巴细胞的刺激增殖能力及NF-κB的活性,均受到CsA的抑制;而TNF-α所诱导的DC却不受CsA的影响。结论CI比TNF-α更迅速、更高效地诱导PBMC向DC分化的原因,是信号转导途径的不同,但不论上游信号转导途径有何不同,两者最终都通过激活NF-κB诱导细胞的分化。     

钙离子载体在诱导人外周血单核细胞分化为树突状细胞中的作用

目的研究钙离子载体(CI)能否诱导人外周血单核细胞(PBMC)分化为树突状细胞(DC)，并初步探讨其信号转导途径。方法分离健康献血者的PBMC，在体外用CI(A23187)或人重组粒细胞／巨噬细胞集落刺激因子(rhGM—CSF)和CI培养40h，或rhGM-CSF和白细胞介素4(IL-4)培养7d，部分PBMC预先用W-7或CsA或K35926处理30min后，再加入上述细胞因子或CI。相差显微镜下观察细胞形态，流式细胞仪检测细胞表面CD14、CD80、CD86、CD83等分子的表达，MTT比色法检测其对同种异体混合T淋巴细胞的刺激增殖作用。结果健康献血者的PBMC经CI培养40h，或rhGM—CSF与CI培养40h，或rhGM-CSF与IL-4培养7d，均可获得DC的典型形态和表面分子的表达，包括CD14表达下调、共刺激分子(CD80、CD86)表达上调，以及较强刺激同种异体混合T淋巴细胞增殖的作用；CI诱导的DC其CD14分子的下调及CD83分子的上调更明显，刺激混合T淋巴细胞的增殖能力更强；rhGM-CSF可协同CI诱导PBMC向DC的分化。经rhGM—CSF及CI处理的PBMC，其形态、表面标志物及对T细胞的刺激增殖能力，均受到W-7或CsA或KT5926不同程度的抑制；而rhGM-CSF及IL-4所诱导的PBMC其形态、表面分子的表达以及刺激T细胞增殖的作用却不受上述抑制剂的影响。结论CI可快速诱导PBMC向DC分化，其分化过程可能受控于Ca^2 /钙调蛋白及其下游的多个细胞信号转导途径的调节。     

钙离子载体对外周血单核细胞来源的树突状细胞的影响

目的：探讨钙离子载体（calcium ionophore,CI)对外周血单核细胞来源的树突状细胞（DC）的影响。方法：分离分离献血者外周血单核细胞。分别加入重组人粒/单集落刺激因子（rhGM-CSF)100μg/L，rhGM-CSF100μg/L CI10μg/L及rhGM-CSF CI各100μg/L，体外培养40h后，于光镜及电镜下观察细胞的形态，流式细胞仪检测细胞的表面标志，MTT比色法检测上述分子对自体T细胞的刺激增殖作用。结果：外周血单核细胞在GM-CSF CI各100μg/L的条件下培养40h，就可看到典型的DC形态，其表面CD14分子表达减少。HLA-DR，CD40，CD83及CD86分子的表达明显增高，且具有明显刺激自体T细胞增殖的能力。结论：CI有显著加速GM-CSF诱导的外周血单核细胞向DC转化的作用。     

罗勒多糖对树突状细胞表面分子表达的影响

目的：观察罗勒多糖对人外周血单核细胞来源的树突状细胞（Dendritic cell，DC）表面分子表达的影响，探讨其抗肿瘤免疫机制。方法：从正常人外周血分离获得单核细胞，加入含10％胎牛血清、CM-CSF及IL-4的RPMI1640，37℃培养5天，实验组加入罗勒多糖，对照组加入PBS，流式细胞仪检测细胞表面分子的表达。结果：在细胞因子的诱导下，CD14^＋单核细胞逐渐分化为DC，罗勒多糖作用组与对照组DC均表达CD209、CD80、CD83、CD86、CD1a和HLA-DR，与对照组相比，罗勒多糖组DC表面分子CD80和HLA-DR的表达均明显上调。结论：罗勒多糖能够调节DC表面分子CD80和HLA-DR的表达，这可能是罗勒多糖发挥其抗肿瘤免疫的机制之一。     

B7-H3单抗交联作用对Mo-DC体外生物学功能的影响

探讨B7-H3分子对人外周血单核细胞来源树突状细胞(Mo-DC)体外成熟和生物学功能的影响。采用常规方法从健康人外周血单核细胞诱导DC,在诱导过程中,加入B7-H3单抗21D4共培养,经流式细胞术检测Mo-DC上B7-H3分子和其他共刺激分子的表达,ELISA试剂盒检测培养上清中细胞因子IL-10和IFN-γ的分泌量,并采用3H-TdR掺入法测定T细胞的增殖。结果:B7-H3分子在未成熟和成熟Mo-DC上均有高水平表达,抗人B7-H3单抗21D4能上调Mo-DC表面CD80、CD86和CD83的表达,提高Mo-DC的共刺激能力,促进T细胞的体外增殖,并能显著促进T细胞分泌IL-10。由此表明,B7-H3单抗21D4交联作用可以促进Mo-DC体外成熟,上调其共刺激T细胞的能力。     

Gp130分子的活化在树突状细胞分化和成熟中的意义

目的 :研究激发型抗gp130分子单抗B S12对树突状细胞 (DC)分化成熟和功能的影响。方法 :人外周血单核细胞在GM CSF和IL 4作用下分化为未成熟DC后 ,加入B S12单抗 ,观察它对DC表型、摄取抗原的能力以及DC分泌IL 12、进行混合淋巴细胞反应及趋化T细胞能力的影响 ;同时比较B S12和激发型抗CD4 0单抗 5C11对DC的作用。结果 :激发型抗gp130分子单抗B S12作用于未成熟DC ,可以上调DC上CD1a和共刺激分子CD80、CD86以及成熟DC的标志CD83分子的表达 ,下调CD14的表达 ,降低DC摄取抗原的能力 ,增强DC分泌IL 12、进行混合淋巴细胞反应及趋化T细胞的能力 ,但这些作用都稍弱于 5C11对DC的作用。结论 :未成熟DC上gp130分子的直接活化可以诱导DC的分化和功能成熟。     

OY-TES-1诱导的树突状细胞对T淋巴细胞的增殖活化作用

目的通过癌-睾丸抗原OY-TES-1致敏树突状细胞(DC),研究其对T淋巴细胞的增殖活化作用。方法体外诱导培养人外周血DC,观察其细胞形态并经流式细胞仪进行表型鉴定;分别用OY-TES-1融合蛋白(OY-MBP)、麦芽糖结合蛋白(MBP)和增强型绿色荧光蛋白(EGFP)致敏DC,与T淋巴细胞共同培养。CCK-8法检测不同蛋白致敏DC后T淋巴细胞的增殖,ELISA检测致敏DC与T淋巴细胞共同培养后上清液IFN-γ的含量。结果诱导出高表达HLA-DR、CD86、CD83和CD80并具有典型细胞特征的DC。经不同蛋白致敏的DC均能促进T淋巴细胞的增殖活化,其中OY-MBP致敏的DC促进T淋巴细胞增殖的能力明显强于其他各组(P<0.05),IFN-γ分泌量也明显高于其他各组(P<0.05)。结论 DC在体外经OY-TES-1融合蛋白致敏后,可显著促进T淋巴细胞的增殖活化。     

单元型相同骨髓移植后患者单核细胞来源的DC表面分子的检测

对单元型相同骨髓移植患者造血重建后的外周血单个核细胞加GM-CSF、IL-4进行DC诱导,7d后加入TNF-α于培养DC中,继续诱导3d。测定DC的表型、混合淋巴细胞反应对T细胞增殖能力的测定,并与健康志愿者外周血来源的DC进行比较。探讨单元型相同造血干细胞移植后患者单个核细胞来源的DC的生物学特性。结果显示,单元型相同造血干细胞移植患者外周血单个核细胞和正常人外周血单个核细胞来源的DC均高表达CD1α、CD83、CD80、CD86和HLA-DR等DC的相关抗原和共刺激分子,患者的未成熟DC经TNF-α诱导后,成为成熟和有功能的DC,单元型相同造血干细胞移植患者单个核细胞来源的DC在体外具有激发同种异体外周血T细胞增殖的能力,与健康人外周血来源DC组相比均无统计学意义(P>0.05)。     

人脐血源性MSCs成骨诱导分化后对DCs的免疫抑制研究

目的探讨人脐血源性间充质干细胞(mesenchymal stem cells derived from umbilical cord blood,UCB-MSCs)经成骨诱导分化后,对树突状细胞(dendritic cells,DCs)的分化、成熟及免疫功能的影响。方法对UCB-MSCs通过细胞形态、表面标记及成骨诱导分化能力进行鉴定;在外周血单核细胞培养体系中加入GM-CSF+IL-4+TNF-α,刺激DCs诱导分化及成熟;收集与成骨诱导分化前后UCB-MSCs共培养的DCs,流式细胞仪检测DCs免疫表型的表达情况;将成熟DCs作为刺激因素,外周血淋巴细胞作为反应细胞,3H-TdR标记β液体闪烁计数仪检测与成骨诱导分化前后UCB-MSCs共培养后,DCs刺激淋巴细胞增殖能力的变化。结果人UCB-MSCs成骨诱导分化后能抑制DCs表面CD40、CD80、CD83、CD86和MHC-II的表达,上调CD14的表达;DCs具有明显刺激淋巴细胞增殖的功能,而UCB-MSCs成骨诱导分化后能显著抑制DCs刺激的淋巴细胞增殖。结论成骨诱导分化的UCB-MSCs在体外可抑制同种异体DCs的分化、成熟及免疫功能,为UCB-MSCs作为同种异体源性种子细胞在骨组织工程中的应用提供了依据。     

Dexamethasone induces IL-10-producing monocyte-derived dendritic cells with durable immaturity

It is highly desirable that immature dendritic cells (DC) used for tolerance induction maintain steady immature state with predominant interleukin (IL)-10 production. In this study, we attempted to develop DC with durable immaturity and other tolerogenic features by using dexamethasone (Dex). We found DC derived from human monocytes in the presence of 10(-7) m Dex were negative for CD1a. Compared with control transduced DC (Ctrl-DC), Dex-DC expressed lower CD40, CD80 and CD86 but equivalent human leucocyte antigen-DR. Both immature Dex- and Ctrl-DC did not express CD83. Nevertheless, upon stimulation of lipopolysaccharide (LPS) or CD40 ligand, the expression of CD40, CD80, CD83 and CD86 was upregulated on Ctrl-DC but not on Dex-DC. The immaturity of Dex-DC was durable following Dex removal. Interestingly, Dex-DC maintained production of large amount of IL-10 and little IL-12 five days after Dex removed. Further study indicated that high-level IL-10 production by Dex-DC was associated with high-level phosphorylation of extracellular signal-regulated kinase (ERK) as blockade of this enzyme markedly attenuated IL-10 production. Furthermore, Dex-DC sustained the capability of high phosphorylation of ERK and IL-10 production 5 days after Dex removal. In addition, Dex-DC had significantly lower activity in stimulating T-cell proliferation. Neutralization of IL-10, to some extent, promoted DC maturation activated by LPS, as well as T-cell stimulatory activity of Dex-DC. The above findings suggest that IL-10-producing Dex-DC with durable immaturity are potentially useful for induction of immune tolerance.     

雷帕霉素和地塞米松对小鼠树突状细胞分化成熟的调控

目的：观察雷帕霉素（rapamycin，Rap）和地塞米松（dexamethasone，Dex）对堵养的小鼠骨髓来源的树突状细胞（DC）分化发育的影响。方法：（1）用GM-CSF＋IL-4定向诱导C57BL／6小鼠骨髓细胞分化为DC，分别加入Rap或Dex，然后用脂多糖（LPS）刺激。在倒置显微镜和扫描电镜下，动态观察DC形态学E的变化。（2）通过流式细胞术（荧光抗体双标记法）测定CD11c^＋细胞的比例及CD86和MHC-Ⅱ类分子表达的变化。（3）通过单向混合淋巴细胞反应（MLR）观察，Rap和Dex处理的DC刺激BALB／c小鼠同种异基因T细胞增殖的情况。结果：（1）经Rap和Dex处理后，DC在形态学上呈现稳定不成熟状态。（2）Rap处理的细胞表面CDIlc和MHC-Ⅱ类分子的表达仅有轻度降低，而CD86的表达明显降低。Dex处理的细胞表面CDIlc的表达与Dex的剂量呈负相关，CD86和MHC-Ⅱ类分子的表达均明硅降低。两种药物处理的DC均可抵抗LPS的促成熟作用。（3）MLR的结果显示，Rap和Dex处理的DC刺激同种异基因BALB／c小鼠T细胞增殖的能力均较低。结论：Rap和Dex均可使DC处于稳定的不成熟状态。与Dex相比，Rap对骨髓造血F细胞向DC分化的过程影响较小，而且在抑制DC表面协同刺激分子CD86表达的同时，对MHC-Ⅱ类分子的表达影响较小。     

Impaired dendritic cell differentiation and maturation in the absence of C3

Human monocytes can be differentiated into immature dendritic cells (DCs) in the presence of serum and cytokines. One of the main functions of immature DCs is to capture and process antigens. Following maturation, they differentiate into antigen presenting cells. The role of complement in the differentiation process from monocytes towards immature DCs remains elusive. Here we demonstrate that complement 3 (C3) has a regulatory impact on the expression of specific DC surface molecules and DC-derived cytokine production during DC differentiation. We isolated human adherent peripheral blood mononuclear cells, which were cultured in the presence of GM-CSF plus IL-4 in medium supplemented with normal human serum or C3 deficient serum. The lack of C3 during DC differentiation negatively impacted the expression of C-type lectin receptor DC-SIGN, the antigen presenting molecules HLA-DR and CD1a, and the costimulatory molecules CD80 and CD86. Further, the spontaneous production of IL-6 and IL-12 was reduced in the absence of C3. Moreover, the maturation of immature DCs in response to LPS challenge was impaired in the absence of C3 as evidenced by reduced MHC-II, co-stimulatory molecule expression as well as modulated IL-12 and TNF-alpha production. Collectively, our results provide evidence for a novel role of C3 as a critical cofactor in human DC differentiation and maturation.     

The effect of calcineurin inhibitors and corticosteroids on the differentiation of human dendritic cells

Corticosteroids and the calcineurin inhibitors cyclosporin A (CsA) and FK506 have been studied extensively regarding their effects on T lymphocytes, but their effects on dendritic cells (DC) are relatively unknown. Monocytes are one of the precursors of DC that differentiate into CD14-CD1a+ immature DC upon culture with IL-4 and GM-CSF. The presence of CsA or FK506 during differentiation did not affect DC development. In contrast, the presence of corticosteroids, either dexamethasone (Dex) or prednisolone (Pred), for as little as the first 48 h of culture blocked the generation of immature DC. Dex-DC were unresponsive to signals inducing maturation (CD40 ligand, lipopolysaccharide), as demonstrated by the absence of CD83, CD80/CD86 and HLA-DR up-regulation and their strongly reduced T cell stimulatory capacity. Furthermore, Dex-DC showed a decreased CD40 ligand-induced IL-6 and TNF-alpha production, a complete block in IL-12p40 production, while IL-10 production was unaffected. CsA-DC and FK506-DC showed a partial reduction in the production of TNF-alpha, whereas all other functional activities appeared to be similar to control DC. These data show that, when compared to calcineurin inhibitors, corticosteroids have a unique and profound inhibitory effect on the generation and function of DC.     

香加皮羽扇豆烷乙酸酯(CPLA)对树突状细胞分化成熟的影响

目的：探讨香加皮羽扇豆烷乙酸酯（CPLA）对人外周血单个核细胞（PBMC）来源的树突状细胞（DC）在体外分化成熟及免疫活性的影响。方法：从人外周血分离单个核细胞，与细胞因子GM—CSF、IL-4共培养，于第5天加入DC的促成熟刺激剂TNF-α（阳性对照组）或CPLA。倒置显微镜和透射电镜下观察DC的形态；应用流式细胞术检测成熟DC的表面标志CD1a、CD83、CD80和CD86的表达情况；用ELISA检测DC培养上清中IL-12和IFN-γ的含量；用MTT法测定DC刺激T细胞增殖的能力。结果：培养10d后，经CPLA刺激的PBMC呈现出典型DC的形态学特征；成熟DC的特征性表面分子CD1a、CD83、CD80和CD86表达水平均明显上调（P〈0．05）；细胞培养上清中IL-12和IFN-γ含量明显增高（P〈0．05）；刺激T细胞增殖的能力明显增强（P〈0．05）。结论：CPLA可诱导PBMC来源的DC分化成熟，并可促进其细胞因子的分泌，增强DC的免疫调节活性。     

Impact of Female Sex Hormones on the Maturation and Function of Human Dendritic Cells

Problem  During pregnancy, the immune and the endocrine system cooperate to ensure that the fetal allograft develops without eliciting a maternal immune response. This is presumably in part achieved by dendritic cells (DCs) that play a dominant role in maintaining peripheral tolerance. In this study, we investigated whether female sex hormones, such as human chorionic gonadotropin (hCG), progesterone (Prog), and estradiol (E2), which are highly elevated during pregnancy, induce the differentiation of DCs into a tolerance-inducing phenotype.
Methods/Results  Immature DCs were generated from blood-derived monocytes and differentiated in the presence of hCG, Prog, E2, or Dexamethasone (Dex) as a control. Unlike Dex, female sex hormones did not prevent the upregulation of surface markers characteristic for mature DCs, such as CD40, CD83, and CD86, except for hCG, which inhibited HLA-DR expression. Similarly, hCG, Prog, and E2 had any impact on neither the rearrangement of the F-actin cytoskeleton nor the enhanced chemokine secretion following DC maturation, both of which were strongly altered by Dex. Nevertheless, the T-cell stimulatory capacity of DCs was significantly reduced after hCG and E2 exposure.
Conclusion  Our findings suggest that the female sex hormones hCG and E2 inhibit the T-cell stimulatory capacity of DCs, which may help in preventing an allogenic T-cell response against the embryo.     

DC-SIGN ligation greatly affects dendritic cell differentiation from monocytes compromising their normal function

DC-SIGN is a C-type lectin selectively expressed by certain types of DCs, including monocyte-derived DCs. Many reports have described the impact of DC-SIGN engagement with concomitant TLR signaling in tailoring of the DC maturation process, but so far, none has addressed the importance of DC-SIGN engagement during their differentiation from blood progenitors. We therefore examined the role of DC-SIGN engagement limited to the stage of IL-4-guided differentiation of DCs from human peripheral blood monocytes but not during maturation. We used two different anti-DC-SIGN antibodies with reported DC-SIGN-engaging activities. In cultures with DC-SIGN ligands, the resulting iDCs displayed abrogated expression of differentiation markers CD1a and DC-SIGN. Without further DC-SIGN activation, such DCs matured with low CD80/CD86 and high ILT3 expression, along with the appearance of macrophage marker CD14. Additionally, treated DCs indicated a tolerogenic potential by possessing a low, allostimulatory capacity and inducing na?ve, allogeneic CD4(+) T cells to produce low levels of IFN-γ. Upon activation, IL-10 production was greatly increased by such DCs; however, the use of IL-10-blocking antibodies could not completely reverse alternative DC activation. This suggests an alternative activation response that is a result of a different elementary state of DCs generated with concomitant ligation of DC-SIGN. During differentiation, IL-4-induced pSTAT6 was reduced by DC-SIGN ligands. Furthermore, during LPS-induced maturation, treated DCs displayed lowered activation levels of p38 MAPK, STAT1, as well as STAT6, compared with controls. Collectively, evidence is presented confirming a crucial role for DC-SIGN signaling in DC generation from monocytes.     

Thymosin-alpha1 modulates dendritic cell differentiation and functional maturation from human peripheral blood CD14+ monocytes

Although thymosins have been demonstrated to have immunomodulatory effects, it is still not clear whether they could affect dendritic cells (DCs), the most professional antigen-presenting cells. The objective of this study was to determine the effect and potential mechanisms of thymosin-alpha1 (Talpha1) on DC differentiation and functional maturation. Human peripheral blood CD14(+) monocytes were purified by using a magnetic separation column and cultured with GM-CSF and IL-4 to differentiate into immature DCs (iDCs). In the presence of Talpha1, iDC surface markers CD40, CD80, MHC class I and class II molecules were significantly upregulated as measured by flow cytemotry analysis. However, Tbeta4 or Tbeta10 did not show these effects on iDCs. There was an approximately 30% reduction in antigen (FITC-conjugated dextran)-uptake by Talpha1-treated iDCs as compared with non-Talpha1-treated iDCs. In addition, Talpha1-treated matured DCs (mDCs) showed an increased stimulation of allogeneic CD3(+) T-cell proliferation as measured by a mixed-lymphocyte reaction assay. Talpha1-treated mDCs also increased the production of several Th1- and Th2-type cytokines as measured by a Bio-Plex cytokine assay. Furthermore, rapid activation of p38 MAPK and NFkappaB was seen in Talpha1-treated iDCs as measured by a Bio-Plex phosphoprotein assay. Thus, Talpha1 significantly enhances DC differentiation, activation, and functions from human peripheral blood CD14(+) monocytes possibly through a mechanism of the activation of p38 MAPK and NFkappaB pathways. This study provides a basis to further evaluate Talpha1 as a possible adjuvant for a DC-directed vaccine or therapy.     

雷公藤内酯醇对系统性红斑狼疮患者DC细胞功能及成熟的影响

目的 通过体外实验研究雷公藤内酯醇(triptolide)对系统性红斑狼疮(systemic lupus erythematosus,SLE)患者树突状细胞(dendritic cell,DC)功能及成熟的影响,为进一步阐明雷公藤内酯醇的免疫学活性提供依据.方法 从SLE患者外周血分离单个核细胞,流式细胞仪分选DC,加入0、5、10、30μg/L的雷公藤内酯醇共孵育,24h后收集上清液,ELISA检测IFN-α、IL-6、TNF-α量,5d后收集细胞,流式细胞仪检测DC表型CD11c、CD80、CD86阳性率,光镜观察DC的形态,扫描电镜观察DC的超微结构.结果 雷公藤内酯醇显著减低活动期与非活动期SLE患者IFN-α、IL-6、TNF-α量,并呈雷公藤内酯醇浓度依赖性(P＜0.05);雷公藤内酯醇可抑制SLE患者DC的分化和成熟,并呈雷公藤内酯醇浓度依赖性(P＜0.05).结论 雷公藤内酯醇能够减弱SLE患者DC的功能,并抑制其分化和成熟.