黄藤素对山羊子宫内膜上皮细胞的体外毒性研究

为了探究黄藤素的体外细胞毒性,采用不同浓度的黄藤素作用山羊子宫内膜上皮细胞（EECs）后,采用MTT法绘制细胞生长曲线;倒置显微镜下观察细胞生长状态;瑞氏-姬姆萨染色法观察细胞形态学变化并通过测定乳酸脱氢酶（LDH）含量检测细胞膜的完整性。结果显示,当黄藤素的浓度为10~227 μg/mL时,黄藤素对EECs有促增殖的作用;当浓度大于227 μg/mL时出现细胞增殖抑制现象,药物对细胞的半数增殖抑制率（IC₅₀）为360 μg/mL;瑞氏-姬姆萨染色结果显示,100、200 μg/mL的黄藤素作用于EECs时均未对其细胞核、细胞浆的形态产生影响;LDH结果显示,药物浓度≥250 μg/mL时细胞LDH的释放量极显著高于正常细胞组（P<0.01）。综上所述,黄藤素作用于山羊EECs后呈现一定的毒性作用,且呈现显著的剂量依赖效应,作用于EECs的安全剂量范围为≤250 μg/mL。     

Effect of Different Mulberry Leaf Extracts on Spleen Lymphocyte Proliferation in Mice

This experiment was aimed to compare the effects of different mulberry leaf extract on spleen lymphocyte proliferation in mice. Mulberry leaf polysaccharides (MLP-1, MLP-2, MLP-3, MLP-4 and MLP-5) were prepared with mulberry leaf aqueous extract (MLAE) by different concentration of alcohol deposit, polysaccharides concentration of all extracts were determined by phenol sulfuric acid method. Five different MLPs and MLAE were as the experimental drug, when polysaccharide concentration was 15.625, 31.25, 62.5, 125 and 250 μg/mL, the changes of spleen B and T lymphocytes proliferation in mice which were stimulated by MLPs and MLAE in single or synergistical stimulation of drugs with LPS and PHA were determined by MTT method. The results showed that when polysaccharide concentration was in the range of 15.625 to 250 μg/mL, MLPs and MLAE in single or synergistical stimulation with LPS and PHA could stimulate the spleen B and T lymphocytes proliferation, MLP-1 at low concentration could stimulate significantly spleen B lymphocyte proliferation remarkably (P<0.05), and MLP-3 and MLP-5 at low concentrations showed strong stimulation ability of T lymphocyte proliferation. When MLAE was in synergistical stimulation with LPS at most concentrations points, the spleen B lymphocytes proliferation in mice were significantly higher than those of the cell control and LPS control groups, which revealed that MLAE could significantly improve the humoral immune function (P<0.05).     

不同桑叶提取物对小鼠脾脏淋巴细胞增殖能力的影响

试验旨在比较不同桑叶提取物对小鼠脾脏淋巴细胞增殖作用的影响。用不同浓度乙醇醇沉桑叶水提物,制备桑叶粗多糖MLP-1、MLP-2、MLP-3、MLP-4、MLP-5,采用苯酚硫酸法测定各提取物多糖含量。以5种桑叶粗多糖和桑叶水提物（MLAE）为试验药物,采用MTT法比较多糖含量分别在15.625、31.25、62.5、125、250 μg/mL浓度时各提取物单独刺激及协同LPS、PHA共同刺激小鼠脾脏B、T淋巴细增殖的变化。结果显示,多糖浓度在15.625~250 μg/mL范围内,各提取物无论单独还是协同LPS和PHA时均能促进小鼠脾脏B、T淋巴细胞的增殖,其中,MLP-1多糖含量在低浓度时能显著刺激脾脏B淋巴细胞增殖（P<0.05）;MLP-3和MLP-5在低浓度时表现出较强的刺激T淋巴细胞增殖的能力;MLAE协同LPS在大部分浓度点的脾脏B淋巴细胞的增殖能力均显著高于细胞对照组和LPS对照组,可显著提升体液免疫功能（P<0.05）。     

银杏叶提取物对热应激致鸡心肌细胞氧化损伤的保护作用研究

本试验旨在研究银杏叶提取物（Ginko biloba extract,GBE）对热应激致鸡心肌细胞氧化损伤的保护作用。取12日龄AA肉鸡心脏制备鸡原代心肌细胞,向原代心肌细胞培养板中分别加入0、5、10、50、100、150 mg/mL GBE,CCK-8试剂盒检测心肌细胞存活率;将原代心肌细胞以1×10⁴个/孔接种于96孔板,培养48 h,分别加入0、5、10、50、100、200、500、1 000 μg/mL GBE,Hoechst 33258检测心肌细胞凋亡率,确定最适GBE浓度。42℃热应激处理（0、0.5、1、2和4 h）建立心肌细胞损伤模型,ELISA试剂盒检测乳酸脱氢酶（LDH）、细胞丙二醛（MDA）和谷胱甘肽过氧化物酶（GSH-Px）含量,以及超氧化物歧化酶（SOD）活性;Western blotting检测Hsp72蛋白表达。结果显示,高浓度GBE具有细胞毒性,50、100、150 mg/mL GBE能极显著抑制细胞生长（P<0.01）,50 μg/mL GBE能够极显著提高细胞增殖率（P<0.01）。热应激后细胞发生凋亡,细胞内MDA、LDH含量增加,SOD活性、GSH-Px含量减少,产生氧化损伤;GBE可以降低热应激时细胞LDH和MDA的含量,增加SOD活性和GSH-Px的含量,热应激2、4 h,GBE处理效果明显。此外,GBE可增加心肌细胞中Hsp72蛋白的表达。综上所述,GBE能降低热应激状态下心肌细胞的氧化损伤,其机制可能与提高抗氧化酶活性及提高Hsp72的表达有关。     

甘肃棘豆黄酮抗氧化活性及免疫活性的研究

为研究甘肃棘豆黄酮的抗氧化及免疫活性,试验通过1,1-二苯基-2-三硝基苯肼（DPPH）自由基、超氧阴离子自由基和羟基自由基的清除率测定其抗氧化活性,通过测定不同浓度甘肃棘豆黄酮对小鼠脾脏淋巴细胞增殖能力、白细胞介素2（IL-2）和免疫球蛋白G （IgG）抗体形成的影响研究其免疫活性。结果显示,甘肃棘豆黄酮对DPPH自由基清除率最高为32.23%,略高于维生素E （28.55%）,低于维生素C （97.05%）;对超氧阴离子自由基清除率最高为80.03%,高于维生素E （69.70%）,低于维生素C （98.69%）;对羟基自由基清除率最高为30.39%,低于维生素C （98.98%）、略低于维生素E （32.57%）。在小鼠脾脏淋巴细胞增殖试验中,随着甘肃棘豆黄酮溶液浓度的提高,脾脏淋巴细胞相对增殖率也提高,当其浓度为200 μg/mL时,小鼠脾脏淋巴细胞的增殖率为23.40%;200 μg/mL甘肃棘豆黄酮组IL-2水平极显著高于对照组（P<0.01）,50和100 μg/mL甘肃棘豆黄酮组与对照组无显著差异（P>0.05）;各甘肃棘豆黄酮组IgG抗体水平均极显著高于对照组（P<0.01）,其中,50 μg/mL甘肃棘豆黄酮组极显著高于100和200 μg/mL甘肃棘豆黄酮组（P<0.01）,100 μg/mL甘肃棘豆黄酮组极显著高于200 μg/mL甘肃棘豆黄酮组（P<0.01）。综上所述,甘肃棘豆黄酮具有较好的抗氧化活性及免疫活性。     

芒硝对驴皮成纤维细胞增殖、凋亡的影响

为研究不同浓度的芒硝对体外培养的驴皮成纤维细胞增殖、凋亡的影响,本试验采用组织块法体外培养驴皮成纤维细胞,并用HE、Masson染色鉴定;再添加高（2 000、1 500 μg/mL）、中（1 000、500、250 μg/mL）和低浓度（100、50、10 μg/mL）芒硝体外培养驴皮成纤维细胞,用MTT和Caspase-3法分别检测成纤维细胞增殖率和凋亡率;最后用实时荧光定量PCR、ELISA法检测不同浓度（1 500、250、10 μg/mL）芒硝培养液中影响驴皮成纤维细胞胶原蛋白合成的相关基因表达量及蛋白浓度。结果显示,培养5 d时,驴皮成纤维细胞开始从组织块边缘爬出,25 d后长满培养皿;HE染色呈典型的梭形,驴皮成纤维细胞中胶原纤维经Masson染色呈蓝色。中浓度芒硝培养液组成纤维细胞的增殖率显著高于高、低浓度组（P<0.05）,相应地,中浓度组的凋亡因子Caspase-3活性显著低于其他两组（P<0.05）。相比于24 h,芒硝作用于成纤维细胞48 h能显著提高胶原蛋白合成相关基因的表达量（P<0.05）,250 μg/mL浓度的效果最佳。综合上述结果,组织块培养法易于分离培养驴皮成纤维细胞,250 μg/mL浓度的芒硝在48 h能显著提高驴皮成纤维细胞的增殖率及其胶原蛋白合成相关基因的表达量,此结果可为芒硝促进驴皮成纤维细胞的增殖作用以及驴皮伤口愈合机制的研究提供理论依据。     

紫玉米花色苷抑制牛传染性鼻气管炎病毒在牛肾细胞中增殖的研究

为研究紫玉米花色苷(purple corn anthocynins,PCA)的抗病毒效果,本试验先通过观察细胞病变效应测定了PCA对牛肾细胞传代系MDBK细胞的毒性作用,以此确定PCA的安全浓度范围;然后以3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐（MTT）法检测了安全浓度范围内的PCA对牛传染性鼻气管炎病毒在MDBK细胞中复制的影响。PCA毒性试验结果显示,PCA对MDBK细胞的最大安全浓度为262.14 μg/mL;而最小浓度为7.8125 μg/mL的PCA就能对牛传染性鼻气管炎病毒在MDBK细胞中的复制有明显抑制作用。MTT试验结果显示,PCA对MDBK细胞的半数抑制浓度（TC₅₀）为262.14 μg/mL,对病毒的半数抑制浓度（IC₅₀）为11.38 μg/mL,以此计算出治疗指数（TI）为23.04。由此证明PCA具有良好的抗牛传染性鼻气管炎病毒的作用,提示紫玉米可作为防制奶牛传染性鼻气管炎的饲料原料。     

ZEA、DON及其联合染毒对CTLL-2细胞因子分泌的影响

为研究镰刀菌毒素玉米赤霉烯酮（ZEA）、脱氧雪腐镰刀菌烯醇（DON）及其联合作用对动物免疫功能的影响,试验以CTLL-2细胞（细胞毒性T淋巴细胞株）为材料,用不同浓度的ZEA （0、5、10、20 μg/mL）、DON （0、0.5、1、2 μg/mL）及联合（空白组、5 μg/mL ZEA、0.5 μg/mL DON、5 μg/mL ZEA＋0.5 μg/mL DON）处理CTLL-2细胞48 h,采用ELISA法检测了细胞内及培养上清液中颗粒酶B （GZMB）、穿孔素（PFP）、干扰素γ（IFN-γ）和肿瘤坏死因子α（TNF-α）等细胞因子的含量。结果显示,ZEA、DON能够降低CTLL-2细胞胞内及培养上清液中PFP、GZMB、IFN-γ的浓度,增加TNF-α浓度,染毒组与对照组相比均有显著或极显著差异（P＜0.05;P＜0.01）,且均呈剂量效应关系;ZEA、DON联合染毒表现为加性效应。结果表明,ZEA、DON及其联合作用可通过影响免疫细胞因子的分泌,降低免疫细胞杀伤活力,间接影响机体体液免疫和细胞免疫的负调节,从而导致动物机体免疫机能下降。     

山羊子宫内膜上皮细胞转染pCI-neo-hTERT质粒后的永生化

为获得大量的、具有高度同一性和表型功能正常的山羊子宫内膜上皮细胞(EEC),本试验将含人端粒酶逆转录酶(hTERT)基因的真核表达质粒pCI-neo-hT ERT导入原代山羊EEC中,筛选稳定转染的细胞克隆,进行表型鉴定,利用免疫细胞化学方法检测hTERT导入后细胞端粒酶活性的表达情况,探讨转染后细胞的生长特性。结果显示,转染后获得的阳性克隆细胞及其传代细胞呈明显铺路石状,与原代细胞形态一致,具有接触抑制性;角蛋白检测阳性;细胞具有较高的端粒酶活性,目前已传至50代仍稳定增殖;100nmol/L的雌二醇(E2)可促进该细胞的增殖;50,100nmol/L的孕酮(P4)可明显抑制该细胞的增殖。这表明hTERT导入山羊EEC后,可使其重建端粒酶活性,从而获得大量的、具有高度同一性和表型正常的细胞。     

Effects of ZEA,DON and Their Combined Effects on the Secretion of Cytokines in CTLL-2 Cells

To analyze the effects of ZEA or/and DON on the immunologic function,CTLL-2 cell was used as experimental materials. After exposing the CTLL-2 cell to different concentrations of ZEA (0,5,10,20 μg/mL),DON (0,0.5,1,2 μg/mL) and ZEA+DON (blank group,5 μg/mL ZEA,0.5 μg/mL DON,5 μg/mL ZEA+0.5 μg/mL DON) for 48 h,the concentration of GZMB,PFP,IFN-γ and TNF-α in CTLL-2 cell and supernatant fluid were detected by ELISA method. The result showed that DON and ZEA could reduce the concentration of PFP,GZMB and IFN-γ in the CTLL-2 cells and the culture supernatant fluids,and increase the concentration of TNF-α. The intoxicated group had significant or extremely significant difference compared to control group (P <0.05;P <0.01),which showed the dose effect. The group exposed to the combined of ZEA and DON showed an additive effect. The result indicated that ZEA,DON and the two combined could reduce the killing activity of immunological cell by affecting the secretion of immunological cytokines, and indirectly affect the negative feedback regulation of humoral immunity and cellular immunity,which led to the decline of immune function in animals.     

添加Ge-132对牛体外胚胎发育潜能的影响

试验旨在研究添加羧乙基锗倍半氧化物（carboxyethylgermanium sesquioxide，Ge-132）对牛孤雌激活后胚胎发育率、胚胎细胞数、早期胚胎内活性氧（reactive oxygen species，ROS）水平及胚胎内相关凋亡基因的影响。在牛早期胚胎体外培养基中添加不同浓度的Ge-132（0、10、100和200 μg/mL），观察其对牛体外孤雌激活胚胎发育的影响；应用Hoechst对孤雌激活后第8天胚胎进行染色后制作装片，在显微镜下对细胞进行计数；用DCFH-DA染色检测早期胚胎内ROS水平，并用Image J测量荧光强度后对数据进行统计分析，用RT-PCR对胚胎内细胞凋亡相关基因（Caspase-3、Bax、Bcl-xl和Survivin）进行分析。结果显示，10 μg/mL Ge-132处理组胚胎率与对照组间无显著差异（P>0.05），但可降低1细胞期的ROS水平；10 μg/mL Ge-132处理组较对照组早期胚胎细胞数显著增加（P<0.05）；通过检测细胞凋亡相关基因mRNA转录水平发现，与对照组相比，10 μg/mL Ge-132处理组胚胎促凋亡基因Caspase-3表达水平显著降低（P<0.05），抑制细胞凋亡基因Survivin表达水平显著升高（P<0.05）。结果表明，在早期胚胎培养基中添加10 μg/mL Ge-132可降低细胞内ROS水平，减少胚胎中氧化应激诱导的细胞凋亡，从而提高孤雌激活后牛胚胎的发育潜能。     

Research on the Antioxident Function of Sulforaphane on the Leydig Cells of Cadmium Exposured Mice

The study was aimed to explore the antioxident function of sulforaphane (SFN) on the leydig cells of cadmium (Cd) exposured mice.Cd and SFN were added to the cell culture medium of TM3 cell, half inhibitory concentration (IC₅₀) of Cd and SFN safe dose range were determined.The tested model was set up,and the relative survival rate of TM3 cells, lactate dehydrogenase (LDH) activity and cell antioxidant levels were determined to study the antioxident function of SFN to cadmium exposured mice.The results showed that:①With the increase of Cd concentration,the relative survival rate of TM3 cells was decreased,and the IC₅₀ of Cd was 51.4 μmol/L;Within a certain concentration range,SFN could increased the cells survive rate,but there was toxicity when the SFN concentration was more than the scope,and the greater the concentration,the greater the toxicity. At experimental condition,SFN safety concentration were 2.5,5 and 10 μmol/L.②Compared with the control group,the GSH content,the T-SOD and GSH-Px activities in Cd group were significantly or extremely significantly decreased (P < 0.05;P < 0.01),and the LDH activity,the MDA content were increased.Additionally,the LDH activity and MDA content of SFN groups were decreased,while others three indexes were increased. Compared with Cd group,the GSH content,the T-SOD and GSH-Px activities of Cd+SFN groups were significantly or extremely significantly increased (P < 0.05;P < 0.01),however,the LDH activity,MDA content were decreased. The result indicated that SFN had the antagonism effect on toxicity of Cd in TM3 cell.     

大豆苷和染料木苷对山羊乳腺上皮细胞增殖的影响

The experiment was aimed to study the effects of different concentrations of daidzin and genistin on proliferation of goat mammary gland epithelial cells, the test was adopted the method of MTT. The results revealed that the ng level of concentration had more effects on cells than the μg level of concentration. And when cells were treated with the two materials for 48 h, the effects were greater than for 24 and 72 h. The highest poteney was detected in daidzin (10 ng/mL) and genistin (10 and 100 ng/mL) compared with the control group.     

葡萄原花青素活性组分的分离及其对肉仔鸡外周血淋巴细胞增殖的影响

本试验通过分离葡萄原花青素（grape procyandins,GPC）混合物的不同组分,研究其对肉仔鸡外周血淋巴细胞（PBLs）增殖的影响,为筛选GPC功能组分提供依据和方法借鉴。首先选取0、0.24、1.2、6.0、30、150 μg/mL 6个终浓度的GPC混合物,确定混合物对肉仔鸡PBLs增殖效果最佳的浓度;然后通过反相高效液相色谱（RT-HPLC）实时分馏,得到GPC最佳浓度时的不同组分;选取GPC最佳浓度的不同组分,研究其对肉仔鸡PBLs增殖效果的最佳组分。结果显示,对肉仔鸡PBLs增殖效果最佳的GPC浓度为30 μg/mL,最佳组分为16～25 min馏出组分。     

Effects of Compound Chinese Herbal Medicinal Polysaccharides on Immune Signal Molecules Expression in Different MHC B-LβⅡ Genotypes Chickens Lymphocyte

This study was aimed to explore the effect of compound Chinese herbal medicinal polysaccharides (cCHMPS) on immunomodulatory in different MHC B-LβⅡ genotype chickens.MHC B-LβⅡ genotype was analyzed by PCR-SSCP method in 500 chickens.Collected the blood from different MHC B-LβⅡ genotype chickens,isolated peripheral blood lymphocytes,and added cCHMPS with the final concentration of 200,100,75,50,25 and 0 μg/mL cocultured for 24 h.Then the lymphocyte supernatant cAMP,cGMP,Ca²⁺,NO and iNOS content were detected by ELISA.The results showed that cCHMPS could increase cAMP,cGMP,Ca²⁺,NO and iNOS levels in chicken lymphocyte supernatant compared with control group in each MHC B-LβⅡ genotype chickens.And when the concentration of cCHMPS was 50 μg/mL,cAMP,Ca²⁺,NO and iNOS levels of AA and BC genotypes chicken lymphocyte supernatant were higher than that of the same genotype chicken,cGMP level of BC genotype chicken lymphocyte supernatant was higher than that of the same genotype chicken;When cCHMPS concentration was 75 μg/mL,cGMP level of AA genotype chicken lymphocyte supernatant was higher than that of the same genotype chicken;When cCHMPS concentration was 100 μg/mL,cAMP,cGMP,Ca²⁺,NO and iNOS levels of BB genotype chicken lymphocyte of the supernatant were higher than that of the same genotype chicken.cCHMPS could increase cAMP,cGMP,Ca²⁺,NO and iNOS levels in different MHC B-LβⅡ genotypes chickens,and the cCHMPS optimum immunomodulatory doses were different in each MHC B-LβⅡ genotypes chickens.     

H9N2亚型猪源性流感病毒在小鼠肺微血管内皮细胞内最佳增殖条件的研究

试验旨在确定H9N2亚型猪源性流感病毒（SIV）在小鼠肺微血管内皮细胞（PMVEC）中增殖的最佳条件。将PMVEC解冻、复苏、培养,取长成单层的PMVEC,在不同浓度TPCK-胰蛋白酶维持液（0.1、0.2、0.3、0.4、0.6、0.8、1.0 μg/mL）、不同H9N2亚型SIV（A/swine/HeBei/012/2008/（H9N2）接种剂量（1：10、1：100、1：1 000、1：10 000、1：100 000、1：1 000 000和1：10 000 000）及不同病毒吸附时间（0.5、1.0、2.0和3.0 h）条件下观察PMVEC形态变化,并测定细胞上清液中H9N2亚型SIV的HA滴度。在未加病毒的情况下,低于0.6 μg/mL的TPCK-胰蛋白酶对PMVEC的生长未造成任何影响,但随着TPCK-胰蛋白酶浓度的增加,PMVEC开始出现肿胀、变圆,甚至脱落;采用含有0.6 μg/mL TPCK-胰蛋白酶维持液将H9N2亚型SIV稀释为不同的浓度感染PMVEC,在0.3 μg/mL TPCK-胰蛋白酶维持液、10^-2病毒稀释倍数感染条件下48和72 h HA滴度分别为4.6log2和6.4log2;病毒吸附时间为2 h且中间震荡20 s的条件下H9N2 HA滴度最佳。结果表明,当TPCK-胰蛋白酶维持液浓度为0.3 μg/mL、病毒接种浓度为10^-2、吸附时间为2 h且中间震荡20 s时,H9N2亚型SIV在PMVEC中增殖最佳,达到6.8log2。     

EGF和FGF-2对猪皮下脂肪神经嵴干细胞增殖和分化的影响

【目的】探究表皮生长因子（epidermal growth factor，EGF）和成纤维细胞生长因子2（fibroblast growth factor 2，FGF-2）对猪皮下脂肪神经嵴干细胞（neural crest stem cells，NCSCs）增殖及分化的影响，以优化猪皮下脂肪神经嵴干细胞的培养条件。【方法】通过体外分离培养原代猪皮下脂肪NCSCs，免疫荧光染色鉴定NCSCs标志物p75 NTR，并用不同浓度的EGF和FGF-2（0和0、10和10、10和20、20和10、20和20、30和30 ng/mL）作用于传代猪皮下脂肪NCSCs，用CCK-8试剂盒测定细胞增殖率，确定细胞生长的最适EGF和FGF-2浓度，将试验分为空白组和最适浓度组，测定两组细胞的生长曲线，成脂化诱导后油红O染色，对比两组细胞的脂滴生成量。【结果】免疫荧光染色结果显示，原代猪皮下脂肪NCSCs经p75 NTR鉴定呈阳性。CCK-8细胞增殖试验结果显示，EGF和FGF-2的浓度均为20 ng/mL时对传代猪皮下脂肪NCSCs的促增殖作用最佳。生长曲线显示，两组细胞均在第5~9天处于对数生长期，第10~15天细胞增殖减缓，逐渐到达停滞期。油红O染色结果显示，最适浓度组胞质内的脂滴生成量远多于对照组。【结论】在培养液中添加20 ng/mL EGF和20 ng/mL FGF-2对猪皮下脂肪NCSCs的增殖和分化有促进作用。     

山羊子宫内膜上皮细胞转染pCI—neo—hTERT质粒后的永生化

为获得大量的、具有高度同一性和表型功能正常的山羊子宫内膜上皮细胞（EEC）,本试验将含人端粒酶逆转录酶（hTERT）基因的真核表达质粒pCI—neo—hTERT导入原代山羊EEC中,筛选稳定转染的细胞克隆,进行表型鉴定,利用免疫细胞化学方法检测hTERT导入后细胞端粒酶活性的表达情况,探讨转染后细胞的生长特性。结果显示,转染后获得的阳性克隆细胞及其传代细胞呈明显铺路石状。与原代细胞形态一致,具有接触抑制性;角蛋白检测阳性;细胞具有较高的端粒酶活性,目前已传至50代仍稳定增殖;100nmol／L的雌二醇（E2）可促进该细胞的增殖;50,100nmol／L的孕酮（P4）可明显抑制该细胞的增殖。这表明hTERT导入山羊EEC后,可使其重建端粒酶活性,从而获得大量的、具有高度同一性和表型正常的细胞。     

肿节风三清颗粒抗炎和抗哮喘作用

本研究旨在考察肿节风三清颗粒的抗炎和平喘作用。MTT法检测200、400、800、1 600 μg/mL肿节风三清颗粒对RAW264.7细胞活力的影响;用脂多糖（LPS）诱导RAW264.7细胞建立体外炎症模型,并采用400、800、1 600 μg/mL肿节风三清颗粒处理,ELISA法检测细胞上清液中肿瘤坏死因子α（TNF-α）、白细胞介素-6（IL-6）水平;用卵清蛋白（OVA）致敏、激发雌性BALB/c小鼠建立哮喘模型,并采用100、200、300 mg/kg肿节风三清颗粒处理,末次激发24 h后,测定哮喘小鼠气道高反应性（AHR）,取支气管肺泡灌洗液（BALF）进行白细胞分类计数,ELISA法检测BALF中IL-4、IL-5和IL-13浓度及血清中OVA-IgE水平。结果显示,200~16 00 μg/mL肿节风三清颗粒对RAW 264.7细胞增殖有显著或极显著促进作用（P<0.05;P<0.01）,与LPS组相比,800、1 600 μg/mL肿节风三清颗粒能够极显著降低TNF-α和IL-6水平（P<0.01）;与哮喘模型组相比,肿节风三清颗粒明显改善了气道高反应性,明显减少了BALF中的炎症细胞数目及IL-4、IL-5和IL-13浓度,极显著降低了血清中OVA-IgE水平（P<0.01）。综上所述,肿节风三清颗粒可通过抑制炎症因子的表达对炎症细胞模型和哮喘小鼠模型起到良好的保护作用。     

Effects of Compound Chinese Herbal Medicinal Polysaccharide Extraction on NF-κB,TNF-α and IL-6 mRNA Expression in Different MHC B-Lβ Ⅱ Genotype of Chickens Lymphocyte

In order to explore the effect of compound Chinese herbal medicines polysaccharides(cCHMPS) on immunomodulatory in different MHC B-Lβ Ⅱ genotype chickens,200 White feather broiler were chosen and PCR-SSCP technique was applied to analyze the polymorphism of MHC B-Lβ Ⅱ gene. The peripheral blood were collected according to the different MHC B-Lβ Ⅱ genotype,and the lymphocytes were isolated from peripheral blood and the cCHMPS were added with a final concentration of 100,75,50 and 0 μg/mL for co-culturing 24 h.Then the expression of NF-κB,TNF-α,IL-6 mRNA in lymphocyte using Real-time PCR method were detected. The results showed that:Compared with the control group,different does of cCHMPS could significantly improve NF-κB,TNF-α,IL-6 mRNA expression levels in chicken with different MHC B-Lβ Ⅱ genotypes (P<0.05), and when the cCHMPS concentration was 50 μg/mL,the NF-κB,TNF-α,IL-6 mRNA expression levels in lymphocyte of AB and AA genotype chicken were significantly higher than that of other groups (P<0.05).The NF-κB,IL-6 mRNA expression levels of AC genotype chicken were significantly higher than the other groups (P<0.05). The TNF-α mRNA expression levels of AC genotype chicken were significantly higher than the other groups when cCHMPS was 100 μg/mL (P<0.05).There results indicated that the cCHMPS could stimulate NF-κB,TNF-α,IL-6 mRNA expression in different MHC B-Lβ Ⅱ genotype chickens,and the optimum immunomodulatory does were different in each MHC B-Lβ Ⅱ genotype chicken.