黄芪当归不同配伍对气虚血瘀证大鼠血液流变学及血清干扰素-γ、白细胞介素-4的影响

目的探讨黄芪当归配伍对气虚血瘀证大鼠血流动力学的改善及对Th1/Th2细胞的调节作用。方法采用限食＋强迫游泳＋皮下注射肾上腺素方法造成大鼠气虚血瘀证模型,分别用不同比例黄芪当归配伍灌胃给药治疗21 d。用血流变仪测定血液流变学指标,ELISA法测定血清中干扰素-γ(IFN-γ)、白细胞介素-4(IL-4)含量。结果服药21 d后,与模型组比较,芪归1∶1组、芪归3∶1组、芪归5∶1组血流变低切指标明显减小,血黏度明显改善。模型组大鼠脾指数、胸腺指数均明显减小,而芪归5∶1组服药后脾指数明显上升。模型组 IFN-γ降低,IL-4升高,以Th2细胞反应占优势;芪归3∶1组、芪归5∶1组能升高血清IFN-γ含量,芪归5∶1组能降低IL-4含量。结论黄芪当归配伍对气虚血瘀证大鼠模型具有改善血液流变及增强免疫作用,并且可以调节Th1/Th2细胞平衡。其中以黄芪比例大于当归时效果较好,综合作用芪归5∶1组最佳。     

小儿喘宝对哮喘大鼠血清及肺泡灌洗液Th1/Th2平衡的影响

目的:研究小儿喘宝对哮喘大鼠血清及肺泡灌洗液中Th1/Th2平衡的影响,探索其治疗哮喘的作用机制。方法:采用卵蛋白(OVA)致敏、激发的方式制作大鼠慢性哮喘模型,以地塞米松为对照药。通过对哮喘大鼠支气管肺泡灌洗液(BALF)细胞涂片中嗜酸性粒细胞(EOS)的计数,血清及肺泡灌洗液(BALF)中IFN-γ、IL-4含量以及IFN-γ/IL-4比值的测定,探索小儿喘宝治疗哮喘大鼠的作用机制。结果:小儿喘宝可减轻大鼠的哮喘症状,减少BALF中EOS的数量,降低血清及BALF中IL-4的含量,升高血清及BALF中IFN-γ的含量,升高IFN-γ/IL-4的比值。结论:小儿喘宝能升高哮喘大鼠血清及肺泡灌洗液中IFN-γ/IL-4的比值,从而纠正失衡的Th1/Th2,这可能是小儿喘宝调节哮喘的作用机制之一。     

化痰通络方对类风湿关节炎大鼠Th1/Th2失衡的影响

目的:通过建立大鼠类风湿关节炎模型,观察化痰通络方对Th1/Th2失衡的影响.方法:建立类风湿关节炎模型,灌喂化痰通络方2周,观察实验鼠血清IFN-γ和IL-4的含量变化.结果:模型组血清IFN-γ含量明显升高,IL-4含量无明显改变;而化痰通络方可以降低IFN-γ的过度表达,减轻局部病理改变.结论:调节类风湿关节炎大鼠Th1/Th2细胞因子的失衡状态,可能是化痰通络方发挥治疗作用的途径之一.     

荆防散乙酸乙酯部位对过敏性动物模型和IFN-γ、IL-4水平的影响

目的:研究荆防散乙酸乙酯部位对大鼠、豚鼠过敏性模型及IFN-γ、IL-4水平的影响,初步探讨其抗过敏作用机制与纠正Th1/Th2免疫失衡的关系。方法:采用卵白蛋白合并百白破疫苗致大鼠全身主动过敏反应模型和卵白蛋白致豚鼠哮喘模型,测定大鼠脏器(胸腺、脾)指数及血清IL-4、IFN-γ水平;测定豚鼠全血白细胞计数、血清Ig E水平,及肺泡灌洗液(BALF)中IL-4、IFN-γ水平和总蛋白含量。结果:与模型对照组比较,荆防散乙酸乙酯部位5.0 g生药/kg、2.5 g生药/kg显著降低全身主动过敏反应模型大鼠血清IL-4水平、升高大鼠胸腺指数及血清IFN-γ水平,并能显著降低哮喘模型豚鼠全血白细胞计数和血清Ig E水平;荆防散乙酸乙酯部位2.5 g生药/kg显著对抗哮喘模型豚鼠肺泡灌洗液中IL-4、总蛋白含量的升高及IFN-γ水平的降低。结论:荆防散乙酸乙酯部位抗过敏作用良好,作用机制与上调IFN-γ水平、下调IL-4水平有关,提示其能通过纠正Th1/Th2免疫失衡来抑制过敏反应。     

补脾强力复方对EAMG大鼠Th1/Th2/Th17细胞因子的影响

目的:研究补脾强力复方对实验性自身免疫性重症肌无力(EAMG)大鼠血清Th1/Th2/Th17细胞因子的影响,探讨其可能的作用机制。方法:选择健康SPF级雌性Lewis大鼠,分为正常组、模型组、醋酸泼尼松组及补脾强力复方高、中、低剂量组,采用免疫诱导注射鼠源性AchR-α亚基97-116肽段方法制备大鼠EAMG模型。ELISA法检测各组大鼠血清细胞因子IFN-γ、TGF-β、TNF-α、IL-2、IL-4、IL-17水平。结果:与正常组比较,模型组大鼠血清中IFN-γ、TNF-α、IL-2、IL-4、IL-17水平均明显升高,TGF-β水平明显降低,差异均有统计学意义(P0.05或P0.01);与模型组比较,补脾强力复方高、中、低剂量组大鼠血清IFN-γ、TNF-α、IL-2、IL-4、IL-17水平明显降低,而TGF-β水平明显升高,差异均有统计学意义(P0.01或P0.05);醋酸泼尼松组大鼠血清TNF-α、IL-2、IL-4、IL-17水平较模型组明显降低,差异均有统计学意义(P0.01)。结论:补脾强力复方能有效降低EAMG大鼠IFN-γ、TNF-α、IL-2、IL-4、IL-17水平,升高TGF-β水平,从而纠正EAMG大鼠Th1/Th2/Th17细胞因子失衡,这可能是其治疗EAMG的作用机制之一。     

针刺对慢性疲劳综合征大鼠血清Th1/Th2的影响

目的:检测针刺对慢性疲劳综合征(CFS)大鼠血清辅助性T细胞(Th)1/Th 2的影响,探讨针刺治疗CFS的作用机制。方法:雄性SD大鼠随机分为正常对照组、模型组、针刺组,每组8只。采用束缚+冷水游泳的复合应激法制备CFS模型。针刺组针刺"百会""关元""足三里"(双)穴,2个疗程(7d为1个疗程,1次/d,共14次)后,测量其体质量,采用酶联免疫法检测各组大鼠血清中Th 1(γ-干扰素,IFN-γ)和Th 2(白介素-4,IL-4)水平。结果:模型组大鼠体质量下降,血清IFN-γ含量较正常对照组降低,IFN-γ/IL-4比值下降(均P0.01);针刺组大鼠体质量增加,血清IFN-γ含量较模型组升高,IFN-γ/IL-4比值上升(P0.01,P0.05)。结论:针刺可调节CFS大鼠Th 1/Th 2失衡,可能是针刺治疗CFS起效的机制之一。     

飞龙掌血提取物对风寒湿佐剂性关节炎大鼠Th17/Treg平衡的影响

目的:探讨飞龙掌血提取物对辅助性T细胞/调节性T细胞(Th17/Treg细胞)平衡的调节而抑制大鼠风寒湿佐剂性关节炎。方法:取SD雄性大鼠,采用物理方法模拟风寒湿环境造模结合弗氏完全佐剂注射造模,将大鼠随机分为空白对照组、模型组、雷公藤多苷片10mg/kg剂量组、飞龙掌血280、70mg/kg剂量组,每组10只。检测大鼠足跖容积、脾、胸腺指数;苏木素-伊红(HE)染色观察足跖关节及膝关节滑膜病理形态;酶联免疫吸附法(ELISA)测定血清白介素-6、10、17(IL-6、IL-10、IL-17)和转化生长因子-β(TGF-β)水平。结果:与空白对照组相比,模型组大鼠体重明显减轻,足跖容积显著增加,脾、胸腺指数明显升高、关节滑膜增生及炎性细胞浸润,血清IL-6和IL-17水平显著升高,血清IL-10和TGF-β含量明显降低。与模型组相比,飞龙掌血280mg/kg剂量组能显著增加大鼠体重,改善大鼠足跖关节及膝关节滑膜病理损伤;飞龙掌血280、70mg/kg剂量组能明显降低大鼠足跖容积,抑制脾、胸腺指数;同时显著降低血清IL-6和IL-17水平,升高血清IL-10和TGF-β含量。结论:飞龙掌血具有良好的抗风寒湿佐剂性关节炎作用,其作用机制可能涉及Th17和Treg细胞之间的平衡。     

止嗽散对咳嗽变异性哮喘大鼠气道炎性反应及外周血Th1/Th2平衡的影响

目的:探讨止嗽散对咳嗽变异性哮喘大鼠气道炎性反应及外周血Th1/Th2平衡的影响。方法:48只雄性SD大鼠随机分为正常对照组、模型对照组、地塞米松组(0.2 mg/kg)、止嗽散高(12.6 g/kg)、中(6.3 g/kg)、低(3.1 g/kg)剂量组,每组8只。以卵白蛋白(OVA)致敏激发法制备大鼠咳嗽变异性哮喘模型,检测各组大鼠血液中嗜酸性粒细胞、中性粒细胞及淋巴细胞含量,采用酶联免疫吸附剂测定法(ELISA)测定血清和肺泡灌洗液(BALF)中IL-4和IFN-γ水平,同时做肺脏的组织病理学检测。结果:止嗽散高剂量组大鼠血液嗜酸性粒细胞绝对值、淋巴细胞绝对值降低,血清和BALF中IL-4含量降低,IFN-γ含量升高,与模型组比较差异有统计学意义(P<0.01,P<0.05);同时能够改善肺脏组织炎性细胞浸润,减轻纤维结缔组织增生。结论:止嗽散可以通过降低血清和BALF中IL-4含量,升高IFN-γ含量,调节Th1/Th2的免疫失衡,改善咳嗽变异性哮喘症状。     

Th1/Th2细胞因子在深静脉血栓形成不同证型中的变化

目的:探讨深静脉血栓形成(DVT)中Th细胞亚群(Th1/Th2)在不同证型中的变化规律,为微观辨证该病提供理论依据。方法:临床选取DVT患者66例,分为湿热下注型组、血瘀湿重型组,并设30例为正常对照组,观察血清中Th1/Th2相关因子TNF-α、IFN-γ、IL-4、IL-10水平。结果:DVT不同证型的Thl/Th2细胞因子水平有不同的变化特点。湿热下注型组、血瘀湿重型组的TNF-α、IFN-γ、IL-4、IL-10水平均较对照组明显升高。湿热下注型组的Thl细胞因子TNF-α和IFN-γ的水平明显高于血瘀湿重型,说明该型患者Thl细胞因子占优势,Th细胞向Th1分化;血瘀湿重型的Th2细胞因子IL-10、IL-4水平明显高于湿热下注型,说明此型患者Th2细胞因子占优势,Th细胞向Th2分化。结论:Th1/Th2细胞因子在DVT不同证型中存在不同变化规律,为DVT证型客观化及辨证论治提供理论依据。     

固本止咳中药对COPD模型小鼠脾、胸腺指数及Th1/Th2失衡的影响

目的:观察固本止咳中药对COPD模型小鼠脾、胸腺指数及Th1/Th2失衡的影响,探讨其治疗COPD的作用机制。方法:采用鼻腔滴入LPS加熏香烟的方法建立COPD小鼠模型,实验分为空白对照组、模型对照组、固本止咳中药组;运用HE染色对形态学进行观察,评价COPD小鼠模型;采用双抗体夹心ELISA方法检测小鼠血清中IFN-γ与IL-4分泌水平。结果:COPD小鼠模型形态学结果符合COPD临床病理形态学改变;模型对照组胸腺指数和脾脏指数显著低于空白对照组(P<0.05),与模型对照组比较,固本止咳中药组小鼠的胸腺指数和脾脏指数显著增加,差异有统计学意义(P<0.05)。与空白对照组比较,模型对照组小鼠血清中IFN-γ升高(P<0.05),IL-4降低(P<0.05),与模型对照组比较,固本止咳中药组小鼠血清中IFN-γ明显降低,IL-4升高,差异有统计学意义(P<0.05)。结论:固本止咳中药能纠正COPD模型小鼠Th1/Th2失衡,改善模型小鼠的免疫功能。     

黄芩汤对溃疡性结肠炎小鼠Th17/Treg、Th1/Th2细胞平衡的影响

目的 研究黄芩汤对溃疡性结肠炎（UC）小鼠肠道辅助性T细胞（Th）17/调节性T细胞（Treg）、Th1/Th2细胞平衡的影响。方法 60只雄性C57BL/6J小鼠,按体质量随机分为正常组、模型组、柳氮磺胺吡啶组（0.2 g·kg^-1）,黄芩汤低、中、高剂量组（4.55、9.1、18.2 g·kg^-1）,除正常组外均予以2.5%右旋葡聚糖硫酸钠（DSS）自由饮水5 d诱导UC,连续灌胃给药7 d后处死小鼠,取肠系膜淋巴结（MLNs）和结肠组织,流式细胞术检测小鼠肠系膜淋巴结Th17/Treg、Th1/Th2,流式细胞微球芯片捕获技术检测结肠组织白细胞介素（IL）-2、IL-17A、IL-6、肿瘤坏死因子-α（TNF-α）、γ干扰素（IFN-γ）、IL-4、IL-10等细胞因子含量,对结肠组织样本进行病理切片观察,并采用免疫组化法检测结肠组织中T细胞表达的T-box（T-bet）、GATA结合蛋白-3（GATA-3）、IL-17A、叉头蛋白P3（FoxP3）的表达水平,酶联免疫吸附测定法（ELISA）检测小鼠结肠组织中转化生长因子-β（TGF-β）的含量。结果 与正常组比较,模型组Th1、Th17细胞数量显著增高,而Th2、Treg细胞数量显著减少,Th1/Th2和Th17/Treg明显升高（P<0.05,P<0.01）,小鼠结肠组织中T-bet、GATA-3、IL-17A、FoxP3表达明显升高（P<0.05,P<0.01）,细胞因子IL-2、IL-17A、IL-6、TNF-α、IFN-γ的含量明显升高,IL-4、TGF-β、IL-10的含量明显降低（P<0.05,P<0.01）。与模型组比较,黄芩汤各剂量组均能逆转Th1/Th2和Th17/Treg细胞的比例失衡（P<0.01）;黄芩汤低、中、高剂量组均可明显降低小鼠结肠T-bet、GATA-3的表达（P<0.05,P<0.01）,黄芩汤高低剂量组可显著降低IL-17A的表达（P<0.01）;黄芩汤高、中剂量组可显著降低细胞因子IL-2、IL-17A、IFN-γ、IL-6、TNF-α的含量,黄芩汤高剂量组还可明显增加TGF-β、IL-10的含量（P<0.05,P<0.01）。结论 黄芩汤可减轻UC小鼠结肠炎症,改善UC小鼠结肠组织损伤,这可能是通过调节Th17/Treg、Th1/Th2细胞平衡及相关细胞因子水平,调节促炎细胞因子的释放水平来实现的。     

Th1/Th2 cytokines’ expression and production by propolis-treated mice

Aim of the study

Propolis is a natural product extensively used in food and beverages to improve health and to prevent diseases, showing immunomodulatory properties. The goal of this work was to evaluate the effect of propolis administration over a short-term to mice on Th1 (IL-2 and IFN-γ) and Th2 (IL-4 and IL-10) cytokines’ expression and production.

Materials and methods

Propolis was administered for 3 days to mice by gavage, spleens were removed and RNA was extracted to assess cytokines’ expression by real-time PCR. Supernatants of spleen cell cultures were used for cytokines determination by ELISA.

Results

Propolis administration to mice did not affect IL-2, IL-4 and IL-10 expression and production, while IFN-γ production was inhibited in the splenocyte cultures stimulated or not by Con A.

Conclusions

Since IFN-γ is a pro-inflammatory cytokine, our data suggest that propolis administration over a short-term to mice may be associated with anti-inflammatory effects in vivo, and further assays could check propolis efficiency in inflammatory diseases.     

维药神香草对COPD小鼠Th1/Th2 和Th17/Treg 平衡的影响

目的：研究维药神香草对COPD 小鼠Th1/Th2 和Th17/Treg 平衡的影响,探讨神香草治疗COPD 的免疫作用机制。方法：复制前期熏烟法建立COPD 小鼠模型,将小鼠随机分为正常组、生理盐水组、神香草高、中、低剂量组。采用酶联免疫吸附法检测小鼠血清中IFN-酌、IL-4、IL-17 及IL-10 的水平。结果：与正常组比较,COPD 模型组小鼠血清IL-4、IL-17 水平明显升高（P<0.05）,IFN-γ、IL-10 的水平明显降低（P<0.05）;神香草治疗后,与模型组比较,小鼠血清IL-4、IL-17 水平明显降低,IFN-γ和IL-10 水平明显升高。相关性分析表明IFN-γ与IL-4,IL-17 与IL-10 都呈负相关。结论：神香草在纠正Th1/Th2 和Th17/Treg 失衡方面发挥了一定的作用。     

当归对阴虚哮喘Balb/c小鼠Th1/Th2及Th17/Treg的影响及机制研究

当归是临床常用中药,具有补阴养血、活血润燥的功能。为研究当归对阴虚哮喘Balb/c小鼠Th1/Th2及Th17/Treg的影响及机制,该实验通过卵清白蛋白加甲状腺素复制阴虚哮喘Balb/c小鼠模型,造模同时分别给予地塞米松(DXM)、当归提取液、当归提取液+DXM灌胃处理,HE染色进行肺组织病理学检查,ELISA法检测支气管肺泡灌洗液(BALF)中IL-4,IL-17,IFN-γ,TGF-β水平及维甲酸受体相关孤儿受体(RORγt)的表达情况。结果显示,当归可显著减轻肺组织炎症浸润程度,升高IFN-γ/IL-4及TGF-β/IL-17的比值,降低肺组织中RORγt的表达强度,当归与DXM配伍的治疗效果最为显著。提示,当归可通过抑制肺组织RORγt表达、调节Th1/Th2及Th17/Treg的功能平衡,改善气道的炎症状态,发挥对阴虚型哮喘的治疗作用。     

黄芪当归配伍对气道变应性炎症大鼠Th1/Th2平衡的影响

目的通过研究黄芪当归配伍对气道变应性炎症模型大鼠鼻黏膜、肺组织干扰素-γ（IFN-γ）、白细胞介素-4（IL-4）表达及血清中IFN-γ、IL-4含量的影响,探讨其作用机制。方法 48只雄性SD大鼠随机分为空白对照组、模型对照组、黄芪组、当归组、芪归配伍组、阳性对照组。采用卵清蛋白（OVA）皮下及腹腔注射致敏、OVA喷雾激发的方法造成大鼠气道变应性炎症模型,各给药组分别用黄芪、当归、黄芪当归配伍水煎液及曲尼司特水溶液灌胃给药。用免疫组化法测定鼻黏膜及肺组织中IFN-γ、IL-4的表达,ELISA方法测定血清中IFN-γ、IL-4含量。结果模型组血清及肺组织中IFN-γ降低,鼻黏膜中IFN-γ变化不明显,而血清、鼻黏膜、肺组织中IL-4均升高;黄芪组可增加鼻黏膜及血清中IFN-γ,当归组可降低肺组织、鼻黏膜及血清中IL-4。芪归配伍组可增加肺组织及血清中IFN-γ,降低鼻黏膜、肺组织、血清中IL-4。相关分析显示,鼻与肺之间IL-4、IFN-γ呈正相关。结论黄芪当归配伍可能通过调节气道变应性炎症中Th1/Th2细胞因子平衡,从而对气道变应性炎症起到抑制作用。     

中医药防治哮喘与Th1/Th2的平衡调节

支气管哮喘(简称哮喘)属世界多发病,疑难病,其发病机制目前尚不十分明确。因此,对于哮喘的防治存在一定的困难。当今的研究表明:Th1/Th2的失衡与哮喘的发病有着密切的关系,但是西医对于这一失衡问题缺乏有效的解决方法,中医药运用多途径、多环节、多靶点的治疗特点能有效解决这一问题。回顾中医药防治哮喘的相关研究,结合中医理论与西医发病机理,探讨中医药防治哮喘与Th1/Th2的平衡调节关系,以期为哮喘的防治开辟新思路与方法。     

Inhibition of Th1 and Th17 Cells by Medicinal Plants and Their Derivatives: A Systematic Review

Searching for new natural drugs that are capable of targeting Th1 and Th17 may lead to development of more effective treatments for inflammatory and autoimmune diseases. Most of the natural drugs can be derived from plants that are used in traditional medicine and folk medicine. The aim of this systematic review is to identify and introduce plants or plant derivatives that are effective on inflammatory diseases by inhibiting Th1 and Th17 responses. To achieve this purpose, the search terms herb, herbal medicine, herbal drug, medicinal plant, phytochemical, traditional Chinese medicine, Ayurvedic medicine, natural compound, inflammation, inflammatory diseases, Th1, Th17, T helper 1 or T helper 17 were used separately in Title/Keywords/Abstract in Web of Science and PubMed databases. In articles investigating the effect of the medicinal plants and their derivatives in inhibiting Th1 and Th17 cells, the effects of eight extracts of the medicinal plants, 21 plant‐based compounds and some of their derivatives, and eight drugs derived from the medicinal plants' compounds in inhibiting Th1 and Th17 cells were reviewed. The results showed that medicinal plants and their derivates are able to suppress Th17 and Th1 T cell functions as well as cytokine secretion and differentiation. The results can be used to produce herbal drugs that suppress Th, especially Th17, responses. Copyright © 2017 John Wiley & Sons, Ltd.     

中药对Th1/Th2细胞因子平衡调节作用的研究进展

概述中药对Thl/Th2平衡的调节作用,主要包括中药对自身免疫疾病Th1/Th2平衡的影响、对肿瘤Th1/Th2平衡的影响、对变态反应性疾病Th1/Th2平衡的影响以及对不同中医证型Th1/Th2平衡的影响等。     

Effect and mechanism of ligustrazine on Th1/Th2 cytokines in a rat asthma model

Ligustrazine is an alkaloid isolated from the rhizome of Chuanxiong (Ligusticum chuanxiong Hort), which is known to possess antioxidant, anti-inflammatory, anti-fibrosis and immunomodulative effects. It is used clinically to treat asthma as an assistant therapy of glucocorticoid. The purpose of this study was to explore the effects of intraperitoneal ligustrazine on Th1/Th2 cytokines in a rat asthma model and the underlying mechanism. SD rats were sensitized and challenged with ovalbumin (OVA) to establish an asthmatic model. Within 24 hours after the last ovalbumin challenge, changes in airway histology were observed. The concentrations of IL-4 and IFN-gamma in bronchoalveolar lavage fluid (BALF) were measured by enzyme linked immunosorbent assay (ELISA). The protein expressions of GATA-3 and T-bet in lung were measured by Western blot. The results showed that an increase of Th2 cytokine and an inhibition of Th1 cytokine were accompanied by an increased expression of GATA-3 protein and a decreased expression of T-bet protein in rat asthmatic airways compared to those in normal control group. Intraperitoneal ligustrazine administration could significantly lower the level of IL-4 in BALF and the expression of GATA-3 protein in lung and also increase the level of IFN-gamma and T-bet in asthmatic rats, resulting in a decreased percentage of eosinophils (EOS) in BALF and ameliorated airway inflammatory cell infiltration. In conclusion, ligustrazine inhibits OVA induced airway inflammation by modulating key master switches GATA-3 and T-bet that result in reversing the Th2 cytokine patterns in asthma.     

Anti-asthma effects of synthetic salidroside through regulation of Th1/Th2 balance

AIM： The aim of the study was to investigate the effect and mechanism of action of synthetic salidroside in an ovalbumin （OVA）-induced asthma model in mice. METHOD： BALB/c mice were sensitized with an intraperitoneal injection of ovalbumin （OVA） to induce a mouse model of asthma in paracmasis. The mice were treated with dexamethasone as the positive control. At the end of the study, respiratory reactivity was detected, the numbers of various kinds of white blood cells in the bronchoalveolar lavage fluid （BALF） were counted, and the levels of IL-4 and INF-γ in BALF were determined. Quantitative PCR was used to detect the mRNA contents of IL-4 and INF-γ in lung tissue. Histologic examination was performed to observe inflammatory cellular infiltration. RESULTS： Salidroside treatment virtually eliminated airway hyper-reactivity, markedly reduced the eosinophil percent, obviously reduced the levels of IL-4 and raised INF-γ in the bronchoalveolar lavage fluid （BALF） compared with the sham-treated group. Quantitative PCR on the mRNA content of IL-4 and INF-γ provided confirmation. Lung histologic observations showed that salidroside reduced inflammation and edema. These effects were equivalent to the effects of dexamethasone. CONCLUSION： Synthetic salidroside exhibits an anti-asthma effect which is related to the regulation of Th1/Th2 balance. This provides a new possibility for treatment of allergic asthma.