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1.
目的研究吸入烟曲霉孢子(A f)对哮喘大鼠气道上皮重构和黏蛋白5AC(MUC5AC)表达的影响。方法64只雄性W istar大鼠随机分为正常对照组(A)、慢性哮喘模型组(B)、慢性哮喘 A f孢子吸入组(C)、慢性哮喘 生理盐水吸入组(D)。C、D两组又分为吸入1周、3周和5周组(C1、C3、C5和D1、D3、D5组),每组8只。测定肺泡灌洗液(BALF)中Il-4和IFN-γ水平、气道阻力变化率、杯状细胞增生程度、气道上皮细胞MUC5AC和肺组织MUC5AC mRNA的水平。结果C组BALF中IL-4水平、杯状细胞面积与上皮细胞面积比值、气道阻力变化率、气道上皮细胞MUC5AC表达及肺组织MUC5AC mRNA水平在不同时间点均高于B组和D1、D3、D5组(P<0.05),且C1、C3、C5三组间比较差异有统计学意义(P<0.05);MUC5AC的表达强度与杯状细胞面积/上皮细胞面积比值正相关(r=0.757,P<0.01),与气道阻力变化率正相关(r=0.521,P<0.05)。结论反复吸入A f孢子可上调哮喘大鼠气道MUC5AC的表达,促进杯状细胞增生,增加气道阻力和气道反应性。  相似文献   

2.
目的 研究吸入烟曲霉孢子(Af)对哮喘大鼠气道上皮重构和黏蛋白5AC(MUC5AC)表达的影响.方法 64只雄性Wistar大鼠随机分为正常对照组(A)、慢性哮喘模型组(B)、慢性哮喘+Af孢子吸入组(C)、慢性哮喘+生理盐水吸入组(D).C、D两组又分为吸入1周、3周和5周组(C1、C3、C5和D1、D3、D5组),每组8只.测定肺泡灌洗液(BALF)中114和IFN-γ水平、气道阻力变化率、杯状细胞增生程度、气道上皮细胞MUC5AC和肺组织MUC5AC mRNA的水平.结果 C组BALF中IL-4水平、杯状细胞面积与上皮细胞面积比值、气道阻力变化率、气道上皮细胞MUC5AC表达及肺组织MUC5AC mRNA水平在不同时间点均高于B组和1、D3、D5组(P<0.05),且C1、C3、C5三组间比较差异有统计学意义(P<0.05);MUC5AC的表达强度与杯状细胞面积/上皮细胞面积比值正相关(r=0.757,P<0.01),与气道阻力变化率正相关(r=0.521,P<0.05).结论 反复吸入Af孢子可上调哮喘大鼠气道MUC5AC的表达,促进杯状细胞增生,增加气道阻力和气道反应性.  相似文献   

3.
李蕴  梁宗安  李素云  毛辉  付宗强 《西部医学》2012,24(11):2051-2056
目的建立Balb/C小鼠的急性哮喘模型,应用复方黄龙汤进行治疗,并与地塞米松治疗效果比较,探讨复方黄龙汤对小鼠哮喘气道炎症的影响及作用机制。方法选取24只6~8周龄雌性Balb/C小鼠,体重(20±2)g,应用随机数字法随机分为正常对照组(A组)、哮喘模型组(B组)、地塞米松治疗组(C组)和复方黄龙汤治疗组(D组),每组6只。应用卵白蛋白致敏液腹腔注射联合OVA雾化吸入法建立哮喘模型,B、C、D组在第0、14天向小鼠腹腔注射OVA配置而成的致敏液0.2ml,第28、29、30天吸入1%OVA/PBS 10ml激发哮喘,造模23天后,C组每天给予地塞米松(2mg/kg),D组每天给予复方黄龙汤(2.7ml/kg);激发结束后,用无创肺功能测量仪测量小鼠气道反应性,qRT-PCR法测定小鼠肺组织中T-bet及GATA-3mRNA的含量,酶联吸附反应测定肺泡灌洗液中IL-4及IFN-γ含量,将肺泡灌洗液离心沉淀后涂片进行中性粒细胞、嗜酸性粒细胞和淋巴细胞等炎性细胞计数,用HE染色肺组织,评价病理改变。结果无创肺功能显示雾化吸入乙酰胆碱剂量>12.5μg/ml时,C组和D组penh值明显低于B组(P<0.05),但高于A组,差异无统计学意义;肺组织中T-bet mRNA表达B组高于A组(P<0.001),D组含量高于B组,但差异无统计学意义(P>0.05)。而GATA-3mRNA表达C、D组低于B组(均P<0.01)。肺泡灌洗液中IL-4含量B组高于A、C和D组(均P<0.01),而IFN-γ含量B组远低于A组(均P<0.01),D组肺泡灌洗液中IFN-γ含量较B组升高,差异有统计学意义(P<0.05);在小鼠肺泡灌洗液中B组嗜酸粒细胞(EOS)比C、D组明显增多(P<0.01);B组气道壁和肺组织中大量炎性细胞浸润(以嗜酸性粒细胞、淋巴细胞为主),支气管管壁增厚,管腔狭窄,与A组比较差异明显;C、D两组小鼠细支气管管腔呈圆形,较规整,其中C组管壁增厚较D组明显,气道壁和肺组织可见嗜酸粒细胞(EOS)及少量淋巴细胞浸润,基底膜无增厚,与B组比较明显减轻。结论复方黄龙汤可通过降低小鼠肺组织炎症反应,减轻支气管重塑,改善肺功能,其作用可能是通过上调T-bet和下调GATA-3平衡来实现的。  相似文献   

4.
目的:研究隐孔茼多糖成分对大鼠气道高反应性的影响,初步探索其作用机制。方法:采用卵白蛋白致敏雾化吸入攻击制备大鼠哮喘模型,隐孔茼多糖成分A、B(5mg/kg、20mg/kg)和酮替芬(5mg/kg)及溶媒对照(等量生理盐水)灌胃10d。用甲酰胆碱激发气道高反应性后,行支气管肺泡灌洗和腹腔灌洗,计数支气管肺泡灌洗液中细胞总数并分类,和腹腔灌洗液中脱颗粒肥大细胞及白细胞分类。结果:隐孔菌多糖成分A、B均能明显抑制致敏大鼠抗原攻击后气道阻力的增加及肺顺应性的下降;减少支气管肺泡灌洗液中白细胞总数,降低嗜酸细胞的数目,以多糖B作用更明显;多糖A和多糖B也明显抑制腹腔肥大细胞脱颗粒及腹腔嗜酸性粒细胞的渗出。结论:隐孔菌多糖A、B成分抑制大鼠的气道高反应性,其作用可能与稳定肥大细胞膜、抑制嗜酸细胞炎症和趋化有关。  相似文献   

5.
黄芪多糖对哮喘大鼠气道炎症及IL-3表达的影响   总被引:1,自引:0,他引:1  
目的 通过观察黄芪多糖对哮喘大鼠肺泡灌洗液细胞总数及嗜酸性粒细胞(Eos)计数、白细胞介素-3(IL-3)表达的影响,探讨黄芪多糖对哮喘的治疗作用及其可能机制.方法 36只雄性SD大鼠随机分为正常对照组(A组)、哮喘模型组(B组)、黄芪多糖治疗组(C组)各12只,采用卵蛋白(OVA)致敏大鼠哮喘模型,观察3组动物哮喘发作症状、肺泡灌洗液总细胞数及嗜酸性粒细胞计数情况及原住杂交方法 检测肺组织中IL-3在肺组织的表达变化.结果 B组大鼠哮喘发作症状明显重于C组,A组无症状.B组肺泡灌洗液总细胞数及嗜酸性粒细胞计数均明显高于其余两组,C组明显少于B组,A组最少.肺组织中IL-3表达A组微弱表达,C组较强,B组表达最强.结论 黄芪多糖可抑制哮喘大鼠的气道炎症,其作用机制可能是通过抑制IL-3的表达来实现.  相似文献   

6.
目的:探讨肝素对哮喘大鼠气道炎症的影响。方法:Wistar大鼠24只,随机分为健康对照组(A组)、哮喘组(B组)、哮喘治疗组(C组),每组8只,哮喘组和哮喘治疗组大鼠均采用5%卵蛋白2ml腹腔注射致敏,于第15d时,用1%卵蛋白激发,共7d。哮喘治疗组在激发前30min予以肝素雾化吸入。哮喘组则在激发前予等量生理盐水雾化吸入。通过powerlab数据记录分析系统测定各组大鼠肺功能;对各组大鼠支气管肺泡灌洗液进行细胞计数及分类并对大鼠气道病理组织学改变进行观察。结果:①与健康对照组比较,哮喘组呼气风流速(PEF)明显降低,差异有统计学意义(P<0.001),哮喘组和哮喘治疗组气道内压上升斜率(IPSlope)则增高,差异有统计学意义(P<0.001,P<0.01);哮喘治疗组PEF较哮喘组增高,差异有统计学意义(P<0.01),而IPSlope则降低,差异有统计学意义(P<0.05)。②哮喘组和哮喘治疗组支气管肺泡灌洗液细胞总数及中性粒细胞、淋巴细胞、嗜酸粒细胞、上皮细胞所占百分数均高于健康对照组,差异有统计学意义(P<0.01,P<0.05);而哮喘治疗组支气管肺泡灌洗液中细胞总数及淋巴细胞、嗜酸粒细胞所占百分数均低于哮喘组,差异有统计学意义(P<0.05)。③哮喘组和哮喘治疗组的气道腔内炎性细胞渗出、气道壁炎性细胞浸润和气道壁平滑肌增厚均明显高于健康对照组,差异有统计学意义(P<0.001,P<0.01);而哮喘治疗组气道腔内炎性细胞渗出和气道壁炎性细胞浸润,又明显低于哮喘组,差异有统计学意义(P<0.001)。结论:雾化吸入肝素可以减轻哮喘大鼠的气道炎症。  相似文献   

7.
氯胺酮雾化吸入对哮喘大鼠气道高反应性的影响   总被引:2,自引:1,他引:2  
目的:观察氯胺酮雾化吸入对哮喘模型大鼠气道高反应性的影响.方法:40只Brown Norway大鼠随机分成对照组(C组)、哮喘模型组(A组)、氯胺酮1组(K1组)、氯胺酮2组(K2组)、氯胺酮3组(K3组),应用动物体描箱法测定大鼠的气道反应性,采用RT-PCR反应测定核因子-κB(NF-κB)的基因表达,采用免疫组化的方法观察NF-κB在支气管上皮的表达.结果:在乙酰胆碱(ACH)浓度为50、100、200 μg/kg时,K1、K2、K3组呼气阻力(Re)的增长率明显小于A组(P<0.01);在ACH浓度为50、100、200 μg/kg时,K1、K2、K3组肺动态顺应性(Cldyn)的下降率明显小于A组(P<0.01).大鼠肺NF-κB p65 mRNA的表达水平和支气管上皮NF-κB阳性细胞率A组显著高于C组(P<0.05),治疗组K1、K2、K3明显低于A组(P<0.05).结论:氯胺酮雾化吸入治疗可明显减轻哮喘模型大鼠气道高反应性.  相似文献   

8.
咪喹莫特对哮喘小鼠气道反应性及气道重塑的影响   总被引:1,自引:0,他引:1  
目的:观察咪喹莫特对哮喘小鼠气道反应性,气道重塑和肺组织血管内皮生长因子(VEGF)表达的影响.方法:30只小鼠按随机数字表法分成3组,每组10只.正常对照组、哮喘组、咪喹莫特组.小鼠于第0、14天以鸡卵白蛋白(OVA)致敏,第24天开始雾化吸人1%OVA激发并持续28天,建立哮喘气道重塑模型.咪喹莫特组在吸人OVA前2 h雾化吸人咪喹莫特30 min.于最后一次雾化结束后24 h,利用肺功能仪测小鼠气道阻力;收集支气管肺泡灌洗液(BALF)进行细胞计数及分类;对肺组织切片行HE染色观察病理学改变:运用医学图像分析软件测定肺组织切片中的血管计数、血管壁平滑肌厚度、血管壁平滑肌细胞计数:用免疫组化方法检测肺组织VEGF的蛋白表达水平;用RT-PCR检测肺组织VEGF mRNA表达水平.结果:哮喘组小鼠呼气阻力(Re)高于对照组(P<0.05),咪喹莫特组Re低于哮喘组(JP<0.05);哮喘组BALF中细胞总数及各种炎症细胞数均较对照组升高(P<0.05).咪喹莫特组较哮喘组降低(P<0.05);哮喘组血管计数、血管壁平滑肌细胞计数较对照组增高,差异均有统计学意义(P<0.05),咪喹莫特组血管计数较哮喘组下降,差异有统计学意义(P<0.05);对照组VEGF蛋白和mRNA在气道不表达或轻度表达,哮喘组VEGF蛋白和mRNA表达较对照组增加,差异有统计学意义(P<0.05),咪喹莫特组能减少VEGF蛋白和mRNA的表达,与哮喘组比较差异有统计学意义(P<0.05),但较对照组仍增加,差异无统计学意义(P>0.05).结论:早期预防性雾化吸入咪喹莫特通过部分抑制哮喘肺组织VEGF蛋白和mRNA的过度表达,阻止慢性哮喘小鼠的血管生成,可在一定程度上减轻哮喘小鼠的气道重塑和气道高反应性.  相似文献   

9.
目的:探讨氯喹对哮喘小鼠气道高反应性的作用及其可能机制。方法 Balb/c小鼠随机分为对照组、哮喘组、氯喹治疗组、地塞米松治疗组、氯喹+地塞米松治疗组,除对照组外,其余各组小鼠均给予OVA致敏和激发,建立哮喘小鼠模型,于每次激发前腹腔注射给药,对照组则于同一时间予等量PBS处理,末次激发后24 h内小鼠肺功能仪检测小鼠气道高反应性;检测支气管肺泡灌洗液(BALF)中细胞总数及分类计数;制作肺组织病理切片,HE染色后光镜下观察病理变化;ELISA检测支气管肺泡灌洗液中细胞因子IL-6、PGF2α水平。结果氯喹可明显降低哮喘小鼠气道高反应性(吸入25 mg/ml Ach时4.5±0.4 vs 6.1±0.9,P<0.05,吸入50 mg/ml Ach时4.6±0.5 vs 8.2±1.0,P<0.001);明显降低哮喘小鼠支气管肺泡灌洗液中炎症细胞数(P<0.01);显著降低哮喘小鼠病理评分(P<0.05);可一定程度降低哮喘小鼠BALF中PGF2α因子水平;与地塞米松合用可明显减轻哮喘小鼠支气管细支气管周围炎症(P<0.05)、血管周围炎症(P<0.01)、肺组织病理评分(P<0.001),明显降低哮喘小鼠BALF中IL-6因子水平(P<0.05)。结论氯喹可抑制哮喘小鼠气道高反应性;地塞米松与氯喹合用较单独用药效果更好,可能对中性粒细胞参与的哮喘有效。  相似文献   

10.
目的:研究褪黑素对哮喘大鼠CD4 CD25 调节性T细胞的影响及抗炎作用。方法:32只SPF级SD大鼠随机分成4组造模,哮喘组、MT组、地塞米松组、正常组,每组8只。各组于最后一次雾化激发后取外周血涂片染色,计数外周血中嗜酸性粒细胞(EOS)百分比;收集肺泡灌洗液(BALF),计数炎症细胞总数;制作肺组织石蜡切片,HE染色计数气道周围EOS数目;用免疫增强浊度法检测血清中IgE水平;用流式细胞术检测外周血中CD4 CD25 Tr数目变化。结果:①哮喘组外周血中CD4 CD25 Tr/CD4 T细胞比值与气道周围EOS细胞数呈现高度负相关(r=-0.73,P<0.05),与BALF细胞总数亦高度负相关(r=-0.78,P<0.05),与血清IgE水平未见显著相关;②CD4 CD25 Tr/CD4 T细胞比值哮喘组显著高于其他各组(均为P<0.01),其他三组差异无统计学意义;③MT组气道周围EOS计数、外周血EOS比例、BALF细胞总数及IgE水平明显低于哮喘组(均为P<0.01)。结论:CD4 CD25 Tr参与了哮喘的发病。褪黑素能显著降低哮喘大鼠CD4 CD25 Tr的数目,有效减轻哮喘大鼠气道炎症和血清IgE上升水平。  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

13.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

20.
ANTI-PROLIFERATION EFFECT OF ORIDONIN ON HL-60 CELLS AND ITS MECHANISM   总被引:4,自引:0,他引:4  
Objcetive To investigate the anti-proliferation effect of oridonin on leukemic HL-60 cells and its mechanism. Methods HL-60 cells in vitro in culture medium were given different concentrations of oridonin. The inhibitory rate of cells were measured by microculture tetrazolium (MTT) assay, cell apoptotic rate was detected by flow cytometry (FCM), morphology of cell apoptosis was observed by hoechst 33258 fluorescence staining, and the activity of telomerase was detected using telomere repeat amplification protocol (TRAP) PCR-ELISA before and after apoptosis occurred. Results Oridonin could decrease telomerase activity, inhibit growth of HL-60 cells, and cause apoptosis significantly. The suppression was both in time- and dose-dependent manner. Marked morphological changes of cell apoptosis including condensation of chromatin and nuclear fragmentation were observed clearly by hoechst 33258 fluorescence staining especially after cells were treated 48-60 hours by oridonin. Conclusions Oridonin has apparent anti-proliferation and apoptotic effects on HL-60 cells in vitro, decreasing telomerase activity of HL-60 cells may be one of its most important mechanisms. These results will provide strong laboratory evidence of oridonin for clinical treatment of acute leukemia.  相似文献   

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