2种方法诱导形成的破骨细胞特性比较

采集ICR小鼠骨髓单核细胞在体外培养过程中加入25.0 μg/L M-CSF+50.0 μg/L RANKL诱导形成破骨细胞,同时选择RAW264.7细胞培养过程中添加100.0 μg/L RANKL诱导分化为破骨细胞.通过检测抗酒石酸碱性磷酸酶(Tartrate resistant acid phosphatase,TRAP)染色阳性数及骨吸收陷窝,比较小鼠骨髓单核细胞和RAW264.7细胞株诱导形成的破骨细胞活性.结果显示,小鼠骨髓诱导的细胞TRAP阳性数显著低于RAW264.7细胞株(P＜0.05),而小鼠骨髓诱导的破骨细胞所形成骨吸收陷窝的面积显著大于RAW264.7细胞株(P＜0.05).结果表明,2种方法均可诱导形成具有典型特征的破骨细胞,骨髓单核细胞诱导形成的破骨细胞活性更强,但破骨细胞的数量和纯度明显低于RAW264.7细胞株.     

受体相互作用蛋白1(RIP1)对BCG诱导小鼠巨噬细胞凋亡的调控作用

旨在通过构建受体相互作用蛋白1(RIP1)腺病毒干扰载体,研究其对BCG诱导的RAW264.7细胞凋亡相关指标的影响,以探讨其在BCG诱导RAW264.7凋亡过程中的调控作用。笔者构建RIP1腺病毒干扰载体,并转染感染BCG的小鼠RAW264.7细胞系,利用流式细胞仪检测各处理细胞凋亡率、细胞线粒体膜电位、细胞活性氧水平及细胞周期等指标,并用Western blot检测凋亡相关蛋白的表达水平。结果显示:BCG感染显著上调了RIP1的蛋白表达水平并提高了小鼠巨噬细胞RAW264.7的凋亡率,当RIP1被干扰后,BCG感染后的RAW264.7细胞凋亡率和活性氧水平显著降低,而促凋亡蛋白Bax表达量显著下调,线粒体膜电位和抑凋亡蛋白表达量上调。同时,BCG感染后细胞周期滞留于G_1期。BCG感染可有效上调RIP1表达量并诱导RAW264.7细胞凋亡。RIP1通过下调BCG感染后RAW264.7细胞的线粒体膜电位,上调活性氧含量并提高凋亡相关蛋白Bax/Bcl-2比值,使细胞周期阻滞于G_1期从而参与诱导细胞凋亡。     

嗜酸乳杆菌抗氧化活性评价及其对小鼠单核巨噬细胞氧化应激的影响

本试验旨在评价嗜酸乳杆菌抗氧化活性及其对小鼠单核巨噬细胞(RAW 264.7细胞)氧化应激的影响。制备嗜酸乳杆菌培养物上清液、完整细胞和胞内提取物,比较其对1,1-二苯基-2-三硝基苯肼(DPPH)、羟自由基和亚油酸的清除能力。筛选抗氧化能力较强的嗜酸乳杆菌培养物上清液,设置4个剂量(5、25、50和125μL)分别作用于RAW 264.7细胞,对照组加入1 mL完全培养液,检测RAW 264.7细胞中一氧化氮(NO)含量、活性氧(ROS)水平以及超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)活性,并进一步探究其对脂多糖(LPS)诱导的RAW 264.7细胞氧化应激的保护作用。结果表明:1)嗜酸乳杆菌培养物上清液的DPPH、羟自由基和亚油酸清除率均显著高于嗜酸乳杆菌培养物完整细胞和胞内提取物(P0.05)。2)将嗜酸乳杆菌培养物上清液作用于正常RAW 264.7细胞,与对照组相比,25、50和125μL嗜酸乳杆菌培养物上清液显著提高了RAW 264.7细胞的细胞活力(P0.05),125μL嗜酸乳杆菌培养物上清液显著提高了RAW 264.7细胞中NO含量(P0.05),25和50μL嗜酸乳杆菌培养物上清液显著提高了RAW 264.7细胞中SOD活性(P0.05),125μL嗜酸乳杆菌培养物上清液显著降低了RAW 264.7细胞中GSH-Px活性(P0.05)。3)将嗜酸乳杆菌培养物上清液作用于LPS诱导的RAW 264.7细胞,与LPS组相比,25、125μL嗜酸乳杆菌培养物上清液显著降低了LPS诱导的RAW 264.7细胞中NO含量(P0.05),25μL嗜酸乳杆菌培养物上清液显著提高了LPS诱导的RAW 264.7细胞中SOD和GSH-Px活性(P0.05)。综上所述,嗜酸乳杆菌培养物各组分均具有DPPH、羟自由基和亚油酸清除能力,作为其中抗氧化活性较好的嗜酸乳杆菌培养物上清液可调节LPS诱导引起的RAW 264.7细胞氧化应激。     

基于CRISPR/Cas9技术构建稳定敲除TRIF基因的RAW264.7细胞株及对IFN-β的影响

利用CRISPR/Cas9技术构建稳定敲除TRIF基因的RAW264.7细胞株。首先,制备Cas9表达慢病毒,感染RAW264.7细胞,通过Puromycin抗性进行初步筛选,PCR法进行鉴定。其次,设计3条特异性识别TRIF基因的sgRNA(sgTi1、sgTi2、sgTi3),将其转入稳定表达Cas9蛋白的RAW264.7细胞株,荧光显微镜观察转入效果,PCR和Western blot法验证基因敲除情况。最后,挑选基因敲除效果最佳细胞株,经TRIF激活剂诱导后,提取细胞总RNA,荧光定量PCR检测IFN-β表达水平。结果显示:感染后的RAW264.7-Cas9细胞Cas9基因扩增产物升高,说明成功获得稳定表达Cas9基因的RAW264.7细胞。含目的基因的慢病毒感染RAW264.7-Cas9细胞后,荧光显微镜下可明显观察到目的基因已成功导入;PCR结果显示,与对照组比较,分别导入sgTi1、sgTi2、sgTi3的3组RAW264.7细胞TRIF表达均受到抑制,Western blot进一步验证3组RAW264.7细胞TRIF蛋白表达均下降且sgTi1组下降最显著,说明TRIF基因敲除成功。经TRIF激活剂诱导,与RAW264.7-Cas9-NC细胞比较,敲除TRIF基因后RAW264.7细胞IFN-βmRNA水平受到明显抑制。结果表明:利用CRISPR/Cas9技术成功构建了稳定敲除TRIF基因的RAW264.7细胞株。     

牛磺鹅去氧胆酸对小鼠巨噬细胞系RAW264.7细胞凋亡的影响

为了探讨牛磺鹅去氧胆酸（TCDCA）对小鼠单核巨噬细胞系RAW264.7的抗凋亡作用,试验采用二苯胺法及实时荧光定量PCR技术分别检测了针对RAW264.7细胞凋亡百分率及凋亡抑制蛋白CIAP-1、CIAP-2和XIAP的mRNA表达影响。结果显示,剂量为0.05、0.10和10 μg/mL TCDCA可以极显著地对抗地塞米松（DEX）诱导的RAW264.7细胞系凋亡（P < 0.01）。1 μg/mL TCDCA对正常RAW264.7细胞系CIAP-1和XIAP表达有显著的促进作用（P < 0.05）;10 μg/mL TCDCA对正常RAW264.7细胞系CIAP-1、CIAP-2和 XIAP表达均具有显著的促进作用（P < 0.05）。TCDCA给药后对DEX诱导的RAW264.7细胞系CIAP-1、CIAP-2和 XIAP表达均具有极显著的促进作用（P < 0.01）,但不同给药剂量的TCDCA作用有所差异。以上研究结果表明,TCDCA具有对抗DEX诱导的小鼠巨噬细胞系RAW264.7凋亡作用,且与上调凋亡抑制蛋白mRNA表达有关。     

柴桂口服液体外抗炎作用的研究

探讨柴桂口服液在脂多糖(LPS)诱导RAW 264.7细胞中的抗炎能力,为研发具有抗炎功效的柴桂制剂提供依据和参考.利用LPS刺激RAW 264.7细胞建立体外炎症模型,CCK8法检测药物对细胞的安全浓度,观察不同浓度的柴桂口服液作用细胞后的体外抗炎效果.结果表明,柴桂口服液对RAW 264.7细胞安全浓度为不超过10...     

复方忍冬藤提取物促进骨折愈合及抗炎作用研究

试验旨在探讨复方忍冬藤提取物对骨折愈合和抗炎的作用。采用牙科电钻制备兔右侧桡骨骨折模型,通过测定血清中钙、磷和碱性磷酸酶的含量,探明其对骨折家兔血清生化指标的影响。利用LPS诱导的RAW264.7细胞建立炎症模型,采用ELISA法测定复方忍冬藤提取物对LPS诱导的RAW264.7细胞释放的炎症因子IL-6、TNF-α、IL-1β和NO含量的变化。结果显示,利用牙科电钻可成功制备兔骨折模型,复方忍冬藤提取物可增加骨折家兔血清中钙和碱性磷酸酶的水平,降低血清中磷含量。与LPS组相比,50~200 μg/mL复方忍冬藤提取物对LPS诱导的RAW264.7细胞分泌的炎症因子TNF-α、IL-1β和NO的含量具有显著的抑制作用（P<0.05）,对IL-6的含量无显著影响（P>0.05）。综上所述,复方忍冬藤提取物对骨折愈合有促进作用,并具有较好的抗炎效果。     

牛磺鹅去氧胆酸对小鼠巨噬细胞系RAW264.7细胞凋亡的影响

为了探讨牛磺鹅去氧胆酸(TCDCA)对小鼠单核巨噬细胞系RAW264.7的抗凋亡作用,试验采用二苯胺法及实时荧光定量PCR技术分别检测了针对RAW264.7细胞凋亡百分率及凋亡抑制蛋白CIAP-1、CIAP-2和XIAP的mRNA表达影响。结果显示,剂量为0.05、0.10和10μg/mL TCDCA可以极显著地对抗地塞米松(DEX)诱导的RAW264.7细胞系凋亡(P0.01)。1μg/mL TCDCA对正常RAW264.7细胞系CIAP-1和XIAP表达有显著的促进作用(P0.05);10μg/mL TCDCA对正常RAW264.7细胞系CIAP-1、CIAP-2和XIAP表达均具有显著的促进作用(P0.05)。TCDCA给药后对DEX诱导的RAW264.7细胞系CIAP-1、CIAP-2和XIAP表达均具有极显著的促进作用(P0.01),但不同给药剂量的TCDCA作用有所差异。以上研究结果表明,TCDCA具有对抗DEX诱导的小鼠巨噬细胞系RAW264.7凋亡作用,且与上调凋亡抑制蛋白mRNA表达有关。     

蒲公英甾醇对LPS诱导小鼠RAW264.7细胞炎性介质NO和PGE_2释放的影响

探讨蒲公英甾醇对脂多糖(LPS)激活小鼠RAW264.7细胞分泌一氧化氮(NO)和前列腺素E2(PGE2)的影响。培养小鼠RAW264.7细胞,用MTT法测定不同浓度蒲公英甾醇对RAW264.7细胞的毒性作用,确定无细胞毒性剂量范围;采用Griess试剂法和ELISA法测定蒲公英甾醇对LPS诱导的RAW264.7细胞分泌NO和PGE2的影响。结果表明:蒲公英甾醇0~20μg/m L浓度范围内对RAW264.7细胞无毒性作用,对LPS刺激的RAW264.7细胞NO和PGE2分泌具有明显的抑制作用,且呈一定的量效关系和时效关系。其中蒲公英甾醇在浓度12.5μg/m L、时间24 h时对NO和PGE2释放的抑制作用最明显。     

紫花地丁总黄酮体外抗炎活性研究

试验研究了紫花地丁总黄酮（TFV）对脂多糖（LPS）诱导的小鼠RAW264.7巨噬细胞活力、细胞中炎症介质含量以及相关基因表达的影响,以期探讨其体外抗炎活性的作用。试验采用MTT法筛选出TFV对小鼠RAW264.7巨噬细胞活力具有促进作用的最佳添加浓度;用酶联免疫吸附法（ELISA）检测了TFV对LPS诱导的小鼠RAW264.7巨噬细胞释放到细胞培养液中NO、肿瘤坏死因子α（TNF-α）、白介素1β（IL-1β）、白介素6（IL-6）含量的影响;运用实时荧光定量PCR法检测了TFV对LPS诱导的炎性小鼠RAW264.7巨噬细胞TNF-α、诱导型一氧化氮合酶（iNOS）和环氧合酶2（COX-2）相对表达水平的影响;研究并分析了TFV的体外抗炎活性。试验结果表明,TFV在5~50 μg/mL浓度范围内能提高小鼠RAW264.7巨噬细胞的活力（P<0.05）;与LPS模型组比较,TFV能显著降低LPS诱导的小鼠RAW264.7巨噬细胞产生NO、TNF-α、IL-6、IL-1β的含量,并能显著降低LPS诱导的小鼠RAW264.7巨噬细胞内TNF-α、COX-2等炎症因子的mRNA表达量（P<0.05）。综上,TFV能显著下调LPS诱导的小鼠RAW264.7巨噬细胞IL-1β、IL-6、TNF-α等细胞因子的释放量和下调TNF-α、COX-2 mRNA的表达量,说明抑制促炎性细胞因子基因的表达可能是实现其抗炎作用的原因之一。     

Inhibitory effects of osteoprotegerin on osteoclast formation and function under serum-free conditions

The purpose of this study was to determine whether osteoprotegerin (OPG) could affect osteoclat differentiation and activation under serum-free conditions. Both duck embryo bone marrow cells and RAW264.7 cells were incubated with macrophage colony stimulatory factor (M-CSF) and receptor activator for nuclear factor κB ligand (RANKL) in serum-free medium to promote osteoclastogenesis. During cultivation, 0, 10, 20, 50, and 100 ng/mL OPG were added to various groups of cells. Osteoclast differentiation and activation were monitored via tartrate-resistant acid phosphatase (TRAP) staining, filamentous-actin rings analysis, and a bone resorption assay. Furthermore, the expression osteoclast-related genes, such as TRAP and receptor activator for nuclear factor κB (RANK), that was influenced by OPG in RAW264.7 cells was examined using real-time polymerase chain reaction. In summary, findings from the present study suggested that M-CSF with RANKL can promote osteoclast differentiation and activation, and enhance the expression of TRAP and RANK mRNA in osteoclasts. In contrast, OPG inhibited these activities under serum-free conditions.     

Regulation of matrix metalloproteinase-9 protein expression by 1α,25-(OH)2D3 during osteoclast differentiation

To investigate 1α,25-(OH)₂D₃ regulation of matrix metalloproteinase-9 (MMP-9) protein expression during osteoclast formation and differentiation, receptor activator of nuclear factor κB ligand (RANKL) and macrophage colony-stimulating factor (M-CSF) were administered to induce the differentiation of RAW264.7 cells into osteoclasts. The cells were incubated with different concentrations of 1α,25-(OH)₂D₃ during culturing, and cell proliferation was measured using the methylthiazol tetrazolium method. Osteoclast formation was confirmed using tartrate-resistant acid phosphatase (TRAP) staining and assessing bone lacunar resorption. MMP-9 protein expression levels were measured with Western blotting. We showed that 1α,25-(OH)₂D₃ inhibited RAW264.7 cell proliferation induced by RANKL and M-CSF, increased the numbers of TRAP-positive osteoclasts and their nuclei, enhanced osteoclast bone resorption, and promoted MMP-9 protein expression in a concentration-dependent manner. These findings indicate that 1α,25-(OH)₂D₃ administered at a physiological relevant concentration promoted osteoclast formation and could regulate osteoclast bone metabolism by increasing MMP-9 protein expression during osteoclast differentiation.     

马链球菌兽疫亚种烯醇化酶对小鼠肺泡巨噬细胞吞噬功能的影响

旨在研究马链球菌兽疫亚种（Streptococcus equi ssp.zooepidemicus，SEZ）烯醇化酶（enolase，Eno）对小鼠肺泡巨噬细胞（RAW264.7）吞噬能力的影响。通过构建原核表达质粒获得重组烯醇化酶（rEno），采用台盼蓝活细胞计数法，判定在不同处理浓度和时间下rEno蛋白对RAW264.7细胞的细胞毒性。将rEno蛋白与RAW264.7细胞共孵育后，用SEZ作用于细胞并检测细胞吞菌数量，判断RAW264.7细胞对SEZ的吞噬活性。进一步通过活细胞稳定同位素标记技术（SILAC）和蛋白质谱分析技术（LC-MS/MS），筛选到RAW264.7细胞中可能与SEZ Eno存在相互作用的候选蛋白。结果发现，10 μg·mL^-1 rEno蛋白处理对RAW264.7细胞有明显的细胞毒性，且10 μg·mL^-1 rEno蛋白处理RAW264.7细胞2和4 h可显著抑制其对SEZ的吞噬作用（P<0.01、P<0.05）。初步筛选到RAW264.7细胞中动力蛋白激活蛋白亚单位蛋白（dynactin subunit protein 2，Dctn）、整合素α-M蛋白（integrin alpha-M）等17种可能与Eno发生互作的蛋白。本研究获得了rEno重组表达蛋白，发现rEno可减少RAW264.7细胞对SEZ的吞噬，互作蛋白的初步筛选也为进一步揭示Eno在SEZ抗吞噬中的作用机制奠定了基础。     

Effects of Enolase of Streptococcus equi ssp. zooepidemicus on Phagocytic Functions of Alveolar Macrophages in Mice

To investigate the effect of enolase (Eno) of Streptococcus equi ssp. zooepidemicus (SEZ) on phagocytosis of mouse alveolar macrophages (RAW264.7). Recombinant enolase (rEno) was obtained by constructing prokaryotic expression plasmid, and the cytotoxicity of rEno protein on RAW264.7 cell proliferation was determined by trypan-blue living cell count method. After the rEno protein was incubated with RAW264.7 cells, SEZ was applied to the cells and the quantity of bacteria being phagocytosed was detected to determine the phagocytic activity of RAW264.7 cells. Further, candidate proteins that might interact with SEZ Eno in RAW264.7 cells were screened by live cell stable isotope labeling (SILAC) and protein spectrum analysis (LC-MS/MS). It was found that protein treatment (rEno,10 μg·mL^-1) had significant cytotoxic effects on RAW264.7 cells. Treatment of RAW264.7 cells with 10.0 μg·mL^-1 rEno protein for 2 and 4 hours could significantly inhibit the phagocytosis of RAW264.7 cells (P<0.01, P<0.05). In RAW264.7 cells, dynactin subunit protein 2 (Dctn), integrin alpha-M and about 17 proteins that might interact with Eno were preliminarily identified as rEno interaction proteins. The rEno recombinant expression protein was obtained in this study, and it could reduce the phagocytosis of RAW264.7 cells to SEZ. Preliminary screening of interacting proteins also laid a foundation for further revealing the mechanism of Eno in the anti-phagocytosis of SEZ.     

辣蓼黄酮乙酸乙酯部分对PRV体外诱导RAW264.7细胞分泌炎性因子的影响

探讨辣蓼黄酮乙酸乙酯部分（ethyl acetate of flavonoids from Polygonum hydropiper L.,FEA）对猪伪狂犬病病毒（Pseudorabies virus,PRV）体外诱导RAW264.7细胞分泌炎性因子的影响。正式试验前将不同浓度的FEA作用于RAW264.7细胞,通过CCK-8检测细胞体外增殖活性,筛选FEA对RAW264.7细胞的安全浓度范围。正式试验分为空白对照组、PRV阳性对照组、芦丁对照组、5个FEA药物组,除空白对照组外,其余各组细胞加入PRV共孵育1.5 h后,再加入芦丁或不同浓度的FEA,分别培养4、8、12、24 h,CCK-8法检测FEA对病毒感染的RAW264.7细胞活性,筛选出3个FEA药物组（高、中、低剂量FEA）,再通过ELISA法检测各时间点细胞培养液上清中炎症相关因子TNF-α、IL-1β、IL-6、IL-10、MCP-1和IFN-γ的分泌水平,以确定FEA体外调节炎症反应的最适时间及药物浓度。结果显示：①FEA对RAW264.7细胞的安全浓度为12.5~200 μg/mL;②25~100 μg/mL FEA能显著提高PRV感染的RAW264.7细胞体外增殖活性;③PRV感染RAW264.7细胞后促进细胞炎症因子的分泌,用FEA处理8~12 h后,在一定程度上降低了TNF-α、IL-1β、IL-6和MCP-1的分泌水平（P<0.05）,升高了IFN-γ分泌水平（P<0.05）,调节了IL-10分泌水平,且FEA处理8 h抗炎效果最好。结果表明,FEA能调节病毒感染细胞分泌炎性因子的水平,提示其具有体外抗炎作用。该结果可为进一步研究FEA抗病毒分子机制提供参考依据。     

一株粗糙型牛种布鲁氏菌诱导株的构建及鉴定

本试验旨在研究布鲁氏菌病疫苗的新型研制方法，并通过op诱导剂成功诱导出一株粗糙型牛种布鲁氏菌弱毒株，命名为RB71。试验检测了RB71相关基因的缺失情况，并对其脂多糖完整性、生长特性、遗传稳定性以及在小鼠巨噬细胞（RAW264.7）中生存能力等与光滑型菌株进行了比较研究。结果显示，试验成功获得了诱导突变株，其缺失片段大小为15 070 bp；热凝集试验阳性，能被结晶紫染色，吖啶黄凝集试验阳性；对提取脂多糖进行银染，结果显示O链缺失，诱导株RB71脂多糖不完整；连续传代30次，PCR检测未发现基因回复突变；在体外相同培养条件下，诱导株RB71生长速度显著低于亲本株A19；入侵RAW264.7细胞72 h时，其胞内存活率与亲本株相比极显著下降（P<0.01）。综上所述，本试验开发出一种能高效诱导光滑型布鲁氏菌变异为粗糙型布鲁氏菌的试剂及诱导方法，成功获得一株具有良好遗传稳定性的粗糙型减毒布鲁氏菌RB71诱导株，该诱导株在RAW264.7细胞内的存活能力显著变弱，这为新型弱毒布鲁氏菌粗糙型疫苗的研制奠定技术基础。     

Construction and Identification of an Induced Strain of Rough Brucella abortus

The purpose of the experiment was to study a new development method of brucellosis vaccine,and to successfully induce a rough Brucella abortus attenuated strain named RB71 by op inducer.Deletions of RB71-related genes were detected,The LPS integrity,growth characteristics,genetic stability,and viability in murine macrophage RAW264.7 cells were compared with those in smooth strains.The results showed that the mutant was successfully induced in the test,and the size of the missing fragment was 15 070 bp.The heat agglutination test was positive,which could be stained by crystal violet,and the acridine yellow agglutination test was positive.The extraction of lipopolysaccharide for silver staining showed that the O chain was deleted,and the induced strain RB71 lipopolysaccharide was incomplete.No gene mutation was detected by PCR after 30 consecutive passages.Under the same culture conditions in vitro,the growth rate of the induced strain RB71 was significantly lower than that of the parent strain A19.When infected with RAW264.7 macrophages in mice for 72 h,the intracellular survival rate was significantly reduced than that of the parent strain (P<0.01).In summary,this experiment successfully obtained an induced strain of Brucella RB71 with good genetic stability through the op inducer mutagenesis technique the survival ability of the induced strain in RAW264.7 cells was significantly weakened,which laid the technical foundation for the development of a new attenuated Brucella rough vaccine.     

BCG诱导RAW264.7细胞脂肪酸氧化对细胞自噬和促炎因子表达的调控作用

旨在探究脂肪酸氧化（fatty acid oxidation,FAO）对BCG介导的RAW264.7细胞自噬和促炎因子表达的调控作用。用BODIPY染色和游离脂肪酸定量试剂盒检测BCG感染后RAW264.7细胞中脂滴聚集情况以及脂肪酸含量;Western blot检测BCG感染对肉毒碱棕榈酰基转移酶1A （CPT-1A）表达的影响;Etomoxir （100 μmol·L^-1）预处理细胞2 h后,BCG感染细胞6 h,检测RAW264.7细胞中BCG存留量,并用Western blot方法检测自噬相关蛋白（Beclin1、LC3-II）和溶酶体蛋白（Rab7）的表达情况;用免疫荧光方法和mRFP-GFP-LC3荧光双标腺病毒分别检测自噬小体聚集和自噬流;荧光定量PCR和ELISA分别检测促炎因子IL-1β、IL-6和TNF-α mRNA表达情况以及在细胞培养上清中的含量。结果显示,BCG感染促进RAW264.7细胞中脂滴聚集和CPT-1A的表达,而游离脂肪酸含量降低;Etomoxir预处理抑制了细胞中BCG存活,并上调了Beclin1、LC3-II和Rab7表达,且细胞中出现大量自噬小体聚集,自噬流增强,却抑制了促炎因子IL-1β、IL-6和TNF-α mRNA表达与分泌。综上表明,抑制FAO可促进BCG感染诱导的RAW264.7细胞自噬,并抑制BCG感染引起的炎症反应。     

中兽药制剂"三黄连散"抗炎作用的研究

为明确三黄连散(SHLP)体内和体外抗炎效果,体外试验采用CCK-8法筛选三黄连散对RAW264.7细胞安全浓度,同时建立LPS诱导RAW264.7细胞的体外炎症模型,以评价药物效果;体内试验用二甲苯诱发小鼠急性炎症模型,测定小鼠耳郭肿胀度、脏器指数及小鼠血清TNF-α、IL-1β、IL-6、IL-8和COX-2含量。结果显示,三黄连散对RAW264.7细胞的安全浓度为50 μg/mL;高、中、低剂量的三黄连散能不同程度降低细胞IL-8、TNF-α、IL-β、COX-2的分泌水平(P<0.05,P<0.01);高剂量的三黄连散能极显著降低细胞上清液中NO的分泌水平(P<0.01);高、中、低剂量的三黄连散均可极显著降低模型小鼠耳郭肿胀和血清炎症因子IL-1β、IL-6、IL-8、TNF-α和COX-2分泌水平(P<0.01);不同浓度三黄连散对小鼠脏器系数无显著影响(P>0.05)。综上表明,三黄连散体内外抗炎效果显著。