Down-regulation of histone deacetylase 7 reduces biological activities of retinal microvascular endothelial cells under high glucose condition and related mechanism

AIM:To investigate the expression and effect of histone deacetylase 7(HDAC7)in human retinal microvascular endothelial cells(HRMECs)under high glucose condition and related mechanism,and the expression of HDAC7 in the retinal tissue in diabetic rats.METHODS:The expression of HDAC7 in HRMECs under high glucose and the retinal tissue from normal or diabetic rats were detected with immunohistochemistry and Western blot.LV-shHDAC7 HRMECs were used to study the effect of HDAC7 on cell activities.Cell count kit-8(CCK-8),5-ethynyl2’-deoxyuridine(EdU),flow cytometry,scratch test,Transwell test and tube formation assay were used to examine the ability of cell proliferation,migration,and angiogenesis.Finally,a preliminary exploration of its mechanism was performed by Western blot.RESULTS:The expression of HDAC7 was both upregulated in retinal tissues of diabetic rats and high glucosetreated HRMECs.Down-regulation of HDAC7 expression significantly reduced the ability of proliferation,migration,and tube formation,and reversed the high glucose-induced high expression of CDK1/Cyclin B1 and vascular endothelial growth factor in high glucose-treated HRMECs.CONCLUSION:High glucose can up-regulate the expression of HDAC7 in HRMECs.Down-regulation of HDAC7 can inhibit HRMECs activities.HDAC7 is proposed to be involved in pathogenesis of diabetic retinopathy and a therapeutic target.

Flavin-Containing Monooxygenase (FMO) Protein Expression and Its Activity in Rat Brain Microvascular Endothelial Cells

The aim of this study was to examine whether flavin-containing monooxygenase (FMO) protein was expressed in cultured rat brain microvascular endothelial cells (BMECs), which constitute the blood-brain barrier (BBB), and whether N-oxide from the tertiary amine, d-chlorpheniramine, was formed by FMO in rat BMECs. BMECs were isolated and cultured from the brains of three-week-old male Wistar rats. The expression of FMO1, FMO2 and FMO5 proteins was confirmed in rat BMECs by western blotting analysis using polyclonal anti-FMO antibodies, but FMO3 and FMO4 proteins were not found in the rat BBB. Moreover, N-oxide of d-chlorpheniramine was formed in rat BMECs. The intrinsic clearance value for N-oxidation at pH 8.4 was higher than that at pH 7.4. Inhibition of N-oxide formation by methimazole was found to be the best model of competitive inhibition yielding an apparent Ki value of 0.53 μmol/L, suggesting that N-oxidation was catalyzed by FMOs in rat BMECs. Although FMO activity in rat BMECs was lower than that in SD rat normal hepatocytes (rtNHeps), we suggest that rat BMECs enzymes can convert substrates of exogenous origin for detoxification, indicating that BMECs are an important barrier for metabolic products besides hepatic cells.

Trimethylamine N-oxide aggravates vascular permeability and endothelial cell dysfunction under diabetic condition:in vitro and in vivo study

AIM:To provide the direct evidence for the crucial role of trimethylamine N-oxide(TMAO)in vascular permeability and endothelial cell dysfunction under diabetic condition.METHODS:The role of TMAO on the in vitro biological effect of human retinal microvascular endothelial cells(HRMEC)under high glucose conditions was tested by a cell counting kit,wound healing,a transwell and a tube formation assay.The inflammation-related gene expression affected by TMAO was tested by real-time polymerase chain reaction(RT-PCR).The expression of the cell junction was measured by Western blotting(WB)and immunofluorescence staining.In addition,two groups of rat models,diabetic and non-diabetic,were fed with normal or 0.1%TMAO for 16wk,and their plasma levels of TMAO,vascular endothelial growth factor(VEGF),interleukin(IL)-6 and tumor necrosis factor(TNF)-αwere tested.The vascular permeability of rat retinas was measured using FITC-Dextran,and the expression of zonula occludens(ZO)-1 and claudin-5 in rat retinas was detected by WB or immunofluorescence staining.RESULTS:TMAO administration significantly increased the cell proliferation,migration,and tube formation of primary HRMEC either in normal or high-glucose conditions.RT-PCR showed elevated inflammation-related gene expression of HRMEC under TMAO stimulation,while WB or immunofluorescence staining indicated decreased cell junction ZO-1 and occludin expression after high-glucose and TMAO treatment.Diabetic rats showed higher plasma levels of TMAO as well as retinal vascular leakage,which were even higher in TMAO-feeding diabetic rats.Furthermore,TMAO administration increased the rat plasma levels of VEGF,IL-6 and TNF-αwhile decreasing the retinal expression levels of ZO-1 and claudin-5.CONCLUSION:TMAO enhances the proliferation,migration,and tube formation of HRMEC,as well as destroys their vascular integrity and tight connection.It also regulates the expression of VEGF,IL-6,and TNF-α.

常压高浓度氧对新生大鼠脑微血管内皮细胞损伤与Nrf2/HO-1信号通路的影响分析

目的探究常压高浓度氧(NBO)对新生大鼠脑微血管内皮细胞损伤及核因子E2相关因子2/血红素氧合酶-1(Nrf2/HO-1)信号通路的影响。方法取新生SD大鼠45只,采用随机数字表法分为常氧组、NBO组和NBO+Nrf2激活剂组,每组各15只。常氧组大鼠置于普通空气(21%氧气)中饲养,NBO组和NBO+Nrf2激活剂组大鼠置于90%常压氧气饲养,NBO+Nrf2激活剂组每日灌胃5 mg/kg Nrf2激动剂莱菔硫烷。测定脑组织伊文思蓝(EB)含量,采用酶联免疫法检测血管内皮生长因子(VEGF)和基质金属蛋白酶9(MMP-9)含量,干湿重法检测脑组织含水量,HE染色和TUNEL染色观察脑组织病理变化,蛋白质印迹法检测海马组织Nrf2/HO-1信号通路蛋白表达,水迷宫检测大鼠认知功能。结果与常氧组比较,NBO组脑组织EB、VEGF、MMP-9含量及脑组织含水量升高,差异均有统计学意义(P<0.05);与NBO组比较,NBO+Nrf2激活剂组脑组织EB、VEGF、MMP-9含量及脑组织含水量降低,差异均有统计学意义(P<0.05)。病理染色结果显示,常氧组大鼠神经细胞形态及结构完整,未见明显病理变化和细胞凋亡;NBO组神经细胞形态及结构不规则,出现明显的水肿和空泡,并伴有大量的凋亡细胞;NBO+Nrf2激活剂组脑组织病理损伤较NBO组明显减轻。与常氧组比较,NBO组脑组织Nrf2、HO-1蛋白相对表达量降低,差异均有统计学意义(P<0.05);与NBO组比较,NBO+Nrf2激活剂组Nrf2、HO-1蛋白相对表达量升高,差异均有统计学意义(P<0.05)。与常氧组比较,NBO组第2~4天逃避潜伏期延长,穿越平台次数减少,差异均有统计学意义(P<0.05);与NBO组比较,NBO+Nrf2激活剂组第2~4天逃避潜伏期缩短,穿越平台次数增多,差异均有统计学意义(P<0.05)。结论NBO可诱导新生大鼠脑微血管内皮细胞损伤,导致远期认知功能障碍,可能与下调Nrf2/HO-1信号通路表达有关。

映山红花总黄酮促进大鼠脑血管内皮细胞体外形成血管作用及与VEGFR_(2)和神经源性H_(2)S的关系

目的探讨映山红花总黄酮(total flavones of rhododendra,TFR)促大鼠脑血管内皮细胞体外形成血管作用及与VEGFR_(2)和神经源性硫化氢(H_(2)S)的关系。方法采用大鼠脑血管内皮细胞单独培养及和与海马神经元共培养,分别采用不同的实验方法检测细胞增殖、迁移、成管及H_(2)S含量和钙离子荧光强度,包括CCK-8法、细胞划痕法、Transwell法、基质胶成管、H_(2)S试剂盒及钙离子荧光探针法。结果在单独培养的大鼠脑血管内皮细胞上,H_(2)S供体NaHS(200μmol·L^(-1))和TFR(90、270、810 mg·L^(-1))对大鼠脑血管内皮细胞的增殖、迁移、成管及[Ca^(2+)]i荧光强度都有明显的促进作用。而VEGFR_(2)阻断剂SU5416(10μmol·L^(-1))可抑制TFR的促进内皮细胞增殖、迁移和形成血管及[Ca^(2+)]i荧光强度;在与海马神经元共培养的大鼠脑血管内皮细胞上,TFR显著地升高共培养中H_(2)S含量,并被CBS抑制剂AOAA(200μmol·L^(-1))抑制。与此同时,TFR明显地促进共培养中大鼠脑血管内皮细胞的形成血管作用,并可被AOAA和VEGFR_(2)阻断剂SU5416显著地抑制。结论TFR在体外可通过VEGFR_(2)升高[Ca^(2+)]i来促进脑血管内皮细胞形成血管,并可通过诱导神经元中CBS生成H_(2)S作用于大鼠脑血管内皮细胞的VEGFR_(2)来促进血管形成。

Protective Effect of Naoxintong Capsule(脑心通胶嚢)Combined with Guhong Injection(谷红注射液)on Rat Brain Microvascular Endothelial Cells during Cerebral Ischemia-Reperfusion Injury

Objective:To investigate the synergistic effect of Naoxintong Capsule(NXTC,脑心通胶囊)and Guhong Injection(GHI,谷红注射液)on cerebral ischemia-reperfusion(丨/R)injury.Methods:Forty-eight Sprague-Dawley rats were divided into 6 groups:control group,oxygen and glucose deprivation(OGD)group,nimodipine group(9.375 mg/kg),NXTC group(0.5 g/kg),GHI group(5 mL/kg)and NXTC+GHI group(0.5 g/kg NXTC+5 mL/kg GHI),after the onset of reperfusion and once per day for the following 7 days.Blood was collected 1 h after final administration,and the sera were collected.Cultured primary rat brain microvascular endothelial cells(rBMECs)were subjected to OGD to establish a cell injury model.Untreated rBMECs were used as blank control.The cell counting kit-8 assay was used to assess cell viability using the sera.Malondialdehyde(MDA)and superoxide dismutase(SOD)levels were assessed using an enzyme-linked immunosorbent assay.Apoptosis was evaluated after Hoechst33342 staining using fluorescence microscopy and flow cytometry.JC-1 staining was performed to assess changes in mitochondrial membrane potential.Results:Statistical analysis indicated that more than 95%of the cells were rBMECs.Compared with the OGD group,the cellular morphology of the all drug delivery groups improved.In particular,the combined drug group had the most significant effect.Compared with the OGD group,all drug intervention groups induced a decrease in the apoptotic rate of rBMECs,increased the SOD levels,and decreased the MDA levels(all P<0.01).Compared with the mono-therapy groups,the NXTC+GHI group exhibited a significant improvement in the number of apoptotic rBMECs(P<0.01).All drug intervention groups showed different degrees of increase in membrane potential,and the NXTC+GHI group was higher than the NXTC or GHI group(P<0.01).Conclusion:The combinationa application of NXTC and GHI on cerebral l/R injury clearly resulted in protective benefits.

差异过筛法体外分离培养原代大鼠脑微血管内皮细胞及其鉴定

目的:采用差异过筛法培养纯度高、活性好的原代大鼠脑微血管内皮细胞(BMECs)。方法:取4周龄SD大鼠脑皮质,经剪碎、细胞筛网过滤、收集网下滤过物、Ⅱ型胶原酶消化后,置于CO_(2)培养箱中进行原代培养。通过细胞形态学观察、血管性血友病因子(vWF)免疫细胞化学染色鉴定所培养的目的细胞。结果:培养24 h后血管段周围爬出短梭形的细胞;48 h后岛屿状的细胞集落形成;72 h后细胞铺满瓶底,呈典型的单层、铺路石样、镶嵌式贴壁生长;免疫细胞化学染色显示,所培养细胞的细胞质呈现棕红色,vWF表达为阳性。结论:差异过筛法能够成功分离培养出原代大鼠BMECs。

薄层液面培养法提取大鼠原代脑微血管内皮细胞及对其的鉴定

目的:采用薄层液面培养法提取大鼠原代脑微血管内皮细胞(BMECs)。方法:取4周龄SD大鼠脑皮质,经剪碎、过筛、Ⅱ型胶原酶消化后获得脑微血管段,并严格精准控制培养液的用量,将其接种于培养皿中进行原代培养。通过倒置相差显微镜对目的细胞的形态学观察、免疫细胞化学染色法对细胞第Ⅷ因子相关抗原(FⅧRag)的检测进行鉴定。结果:镜下观察到所培养的目的细胞呈典型的单层、铺路石样、镶嵌式排列生长;FⅧRag阳性细胞率达99%以上。结论:薄层液面培养法能够成功分离培养出活性强、纯度高的大鼠原代BMECs。

大鼠原代脊髓微血管内皮细胞的体外分离培养及鉴定

目的:建立一种简单高效的大鼠原代脊髓微血管内皮细胞培养方法。方法:分离大鼠脊髓组织,经剪碎、细胞筛网过滤、Ⅱ型胶原酶消化后接种培养。通过细胞形态学观察、FⅧRag免疫细胞化学染色鉴定所培养的目的细胞。结果:接种的脊髓微血管段呈“短棍样”,培养24 h后有少量短梭形细胞从血管段周围迁移爬出,48 h后逐渐形成“岛屿状”的细胞集落,72 h后细胞铺满皿底,呈典型的单层、“鹅卵石样”、镶嵌式排列生长;细胞FⅧRag免疫细胞化学染色显示细胞质呈棕红色,表达为阳性。结论:该方法可成功分离培养出活性好、纯度高的大鼠原代脊髓微血管内皮细胞。

黄芪甲苷配伍三七总皂苷对OGD/R大鼠脑微血管内皮细胞屏障功能的影响

目的观察黄芪甲苷(astragalosideⅣ,ASTⅣ)配伍三七总皂苷(Panax notoginseng saponins,PNS)对氧糖剥夺后再复糖复氧(oxygen-glucose deprivation/reperfusion,OGD/R)大鼠脑微血管内皮细胞(brain microvascular endothelial cells,r BMECs)屏障功能的影响。方法原代培养并鉴定r BEMCs,取第3代rBMECs,采用ASTⅣ与PNS高(100μmol/L+60μmol/L)、中(50μmol/L+30μmol/L)、低(25μmol/L+15μmol/L)剂量配伍预处理24 h,以OGD/R建立缺血再灌注损伤模型,同时设立对照组和模型组。CCK-8检测细胞存活情况,利用跨内皮细胞电阻(transendothelial electrical resistance,TEER)检测细胞屏障功能的改变,免疫荧光检测血脑屏障连接蛋白Occludin和ZO-1蛋白含量,Western blot检测黏附分子ICAM-1、VCAM-1的蛋白表达及NF-κB-p65的活化表达情况,ELISA检测细胞培养液中炎症因子TNF-α及IL-1β表达水平。结果成功培养分离rBMECs,阳性表达vWF。与对照组比较,模型组细胞存活数量明显减少(P<0.01),与模型组比较,ASTⅣ与PNS不同剂量配伍均能提高rBMECs的存活率(P<0.05,P<0.01)。与对照组比较,模型组TEER值、Occludin和ZO-1荧光强度显著降低(P<0.01),与模型组比较,ASTⅣ与PNS不同剂量配伍均能显著增高TEER值(P<0.01)、增加Occludin和ZO-1荧光强度(P<0.05,P<0.01)。与对照组比较,模型组TNF-α、IL-1β、ICAM-1、VCAM-1、p-NF-κB-p65表达显著增强(P<0.01),与模型组比较,ASTⅣ与PNS中高剂量配伍组TNF-α、IL-1β、ICAM-1、VCAM-1、p-NF-κB-p65表达量下降(P<0.01)。结论ASTⅣ配伍PNS能够显著抑制NF-κB活化,降低细胞炎症因子的表达,增高OGD/R模型rBMECs屏障功能,保护缺血缺氧后的脑组织。

miR-204-5p靶向TRIB3对脂多糖诱导的肺微血管内皮细胞损伤的影响

目的探讨miR-204-5p对脂多糖(LPS)诱导的肺微血管内皮细胞损伤的影响及其可能作用机制。方法采用LPS诱导大鼠肺微血管内皮细胞(PMVEC)建立细胞损伤模型,实验分组:NC组、LPS组、LPS+miR-con组、LPS+miR-204-5p组、LPS+si-con组、LPS+si-TRIB3组、LPS+miR-204-5p+pcDNA组、LPS+miR-204-5p+pcDNA-TRIB3组;MTT法检测细胞活力;qRT-PCR、Western blot检测miR-204-5p、TRIB3表达;流式细胞术检测细胞凋亡;ELISA检测TNF-α、IL-6水平;双荧光素酶实验检测miR-204-5p与TRIB3的靶向关系。结果与NC组比较,LPS组细胞活力、miR-204-5p表达量降低(1.00±0.10比0.43±0.04),细胞凋亡率、TRIB3 mRNA(1.00±0.09 vs 2.13±0.18)和蛋白(0.40±0.04 vs 0.83±0.08)水平、TNF-α、IL-6水平升高(P<0.05);过表达miR-204-5p或敲低TRIB3可升高细胞活力,降低细胞凋亡率和TNF-α、IL-6水平(P<0.05);TRIB3是miR-204-5p的靶基因,上调TRIB3可减弱过表达miR-204-5p对细胞增殖、凋亡和炎症反应的影响。结论miR-204-5p过表达可靶向负调控TRIB3表达促进细胞增殖,抑制细胞凋亡和炎症反应,从而减轻LPS诱导的肺微血管内皮细胞损伤。

大鼠肠黏膜微血管内皮细胞的体外培养

目的 培养大鼠肠黏膜微血管内皮细胞,为内皮细胞的体外研究提供实验材料。 方法 利用机械 吹打法和酶消化法分别分离出肠绒毛固有层,采用植块培养法培养原代内皮细胞,依次以局部消化法和差速黏附 法进行纯化,细胞鉴定采用第Ⅷ因子相关抗原免疫荧光检测和硝酸银染色。 结果 成功分离培养出大鼠的肠黏 膜微血管内皮细胞,纯化后的细胞可传到18代以上。 结论 为肠黏膜微血管内皮细胞的体外培养建立了一种 操作简单、成本低廉的方法。

组织块法培养大鼠肺微血管内皮细胞的综合鉴定

目的为组织块法培养的大鼠肺微血管内皮细胞(rat pu lmonary m icrovascu lar endothelial cells,RPMVECs)建立合理可靠的多指标综合鉴定方案。方法采用外周肺组织贴块法培养RPMVECs,抽取组织块进行切片观察,以大鼠肺动脉平滑肌细胞和人脐静脉内皮细胞为对照,对培养细胞进行CD34、植物凝集素BSI、Ⅷ因子相关抗原免疫细胞化学鉴定,通过光镜和透射电镜观察细胞形态和超微结构。结果组织切片显示组织块源于外周肺组织,CD34免疫细胞化学染色阳性,植物凝集素BSI结合试验阳性,而Ⅷ因子相关抗原染色阴性,透射电镜未见W e ibel-Palade小体。结论Ⅷ因子相关抗原和W e ibel-Palade小体并非RPMVECs鉴定的理想指标,联合应用外周肺组织切片、CD34和植物凝集素BSI三指标为组织块法培养的RPMVECs提供了一个简单易行、合理、可靠的综合鉴定方案。

大鼠脑皮质微血管内皮细胞的分离和培养

目的:本研究旨在探索1种有效分离、培养和获取较高纯度大鼠脑微血管内皮细胞(BMECs)的方法。方法:自12dSD大鼠脑分离出皮质,采用二次酶消化、BSA和Percoll非连续梯度离心获得较纯的脑微血管段后,接种于涂布有明胶的培养皿进行原代培养;相差显微镜观察细胞的形态学特性,进行血管内皮细胞特异性标志物Ⅷ因子相关抗原免疫组化检测。结果:培养24h即可见细胞从贴壁的脑微血管段周围爬出,细胞呈短梭形,集落呈典型的"鹅卵石样",区域性单层生长,6-7d内皮细胞开始融合,血管内皮细胞特异性标志物Ⅷ因子相关抗原表达阳性,纯度达92.6%。结论:成功地自大鼠脑皮质分离并培养出纯度较高的BMECs,为进一步开展脑微血管内皮细胞的生物学特性的相关研究提供有用的方法。

大鼠脑微血管内皮细胞的纯化培养与鉴定

目的探讨获取纯度较高的原代大鼠脑微血管内皮细胞(BMECs)的分离和培养方法。方法选取10只3周龄Wistar大鼠,取大脑,去除白质,剪碎成大约1 mm^3大小,通过两次酶消化、20%BSA离心和33%连续密度Percoll梯度离心,获得纯度较高的大脑微血管片段,接种于涂布明胶的35 mm dish培养皿中,加入含4μg/ml嘌呤霉素的内皮细胞培养基,2d后更换新鲜培养基;采用倒置显微镜观察内皮细胞生长状况及其形态;免疫组化法检测BMECs标志物Ⅷ因子相关抗原(vWF)的表达,以及神经胶质原纤维酸性蛋白(GFAP)的表达情况。结果培养24 h后可见内皮细胞从贴壁的脑微血管片段周围长出,细胞呈梭形;5～6 d可形成融合;融合后的BMECs呈典型的"鹅卵石"样外观;免疫组化法检测显示BMECs的vWF表达阳性,CFAP表达阴性,内皮细胞纯度(vWF阳性细胞表达率)达96%以上。结论该方法能够成功获得纯度较高的原代大鼠BMECs。

乳鼠心肌膜微血管内皮细胞的体外培养

目的改进心肌膜微血管内皮细胞的体外培养方法,为进一步研究其结构和功能提供实验数据。方法选取10-15d龄的SD大鼠,采用植块法培养原代心肌膜微血管内皮细胞,在继代培养中通过差速消化和差速贴壁方法、结合倒置显微镜下形态学的观察进行继代培养和纯化,利用免疫细胞化学方法检测第Ⅷ因子相关抗原对培养细胞进行了鉴定。结果成功培养了大鼠心肌膜微血管内皮细胞,细胞呈多边形或鹅卵石状;免疫细胞化学染色第Ⅷ因子相关抗原显阳性。结论改良了心肌膜微血管内皮细胞的体外培养方法,获得了较高纯度的心肌膜微血管内皮细胞,可用于进一步的科学研究。

脑微血管内皮细胞体外缺血再灌注模型的建立及牛胆酸的保护作用

目的:建立脑微血管内皮细胞体外缺血再灌注模型,并观察了牛胆酸对其影响。方法:体外培养大鼠脑微血管内皮细胞,以氧糖剥夺(Krebs液)再复氧复糖模型模拟缺血再灌注损伤,并用牛胆酸进行了干预,用MTT比色法测定A值代表细胞生存活性。结果:氧糖剥夺4h再复氧复糖12h可造成培养大鼠脑微血管内皮细胞损伤,牛胆酸干预后A值明显高于模型组(P<0.01)。结论:牛胆酸可显著减轻脑微血管内皮细胞体外模拟缺血再灌注细胞损伤。

大鼠脑微血管内皮细胞的体外培养及鉴定

探讨大鼠脑微血管内皮细胞的体外培养方法,为研究猪链球菌引起脑膜炎的致病机理打下基础。采用脑组织匀浆、二次过筛及酶消化技术分离大鼠脑微血管段,对分离的脑微血管内皮细胞进行了体外培养、形态学观察、免疫荧光鉴定及生长曲线的MTT法测定。结果表明:倒置显微镜下,细胞具有单层"铺路石样"排列的典型特征,免疫荧光检测第Ⅷ因子相关抗原呈阳性,成功建立了大鼠脑微血管内皮细胞的体外培养方法。

一种高纯度和高活力的大鼠脑微血管内皮细胞的提取及原代培养方法

目的：建立一种纯度和活力较高、简单实用的大鼠脑微血管内皮细胞分离及原代培养方法,为建立体外血脑屏障提供材料。方法采集1-2周SD大鼠大脑皮质,应用Ⅱ型胶原酶和分散酶/胶原酶连续消化法,筛网过滤法及20%BSA和44%Percoll两次梯度离心法获得脑微血管段后,接种于培养瓶中进行原代培养,采用倒置显微镜对所培养的细胞进行形态学观察,以Ⅷ因子相关抗原免疫染色法对其进行鉴定。结果体外培养2h后,微血管内皮细胞爬出血管段进行贴壁生长,3～4 d呈典型的铺路卵石样结构,Ⅷ因子相关抗原免疫组化检测内皮细胞表达呈阳性,可见细胞胞质呈棕色,阳性细胞占99%以上。结论该方法能成功地分离并培养出高纯度的大鼠脑微血管内皮细胞,对体外血脑屏障的建立以及脑微血管内皮细胞的生物学特性和功能的深入研究具有重要意义。

刀豆蛋白A诱导大鼠小肠黏膜微血管内皮细胞分泌IFN-γ的研究

目的探讨刀豆蛋白A(ConA)能否诱导肠黏膜微血管内皮细胞分泌IFN-γ。方法采用双抗夹心ELISA法检测细胞培养上清液中的IFN-γ的含量。结果ConA能极显著地激活大鼠肠黏膜微血管内皮细胞分泌IFN-γ,5.0mg/L ConA的激活作用有时间依赖性,但10.0mg/L ConA激活作用未表明有时间依赖性;5.0mg/L ConA组和10.0mg/L ConA组间无显著性差异。结论ConA能激活大鼠小肠黏膜微血管内皮细胞分泌IFN-γ。