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1.
目的 探讨最适合小鼠淋巴管内皮细胞(mouse lymphatic endothelial cell,MLEC)生长的体系.方法 小鼠腹腔注射乳化的不完全弗式佐剂(15 d后再注射1次),诱导形成良性淋巴管瘤.消化法分离MLEC,分别置于明胶、鼠尾胶、基质胶或纤维蛋白凝胶包被的培养板中生长,流式细胞术对MLEC进行鉴定,倒置相差显微镜观察细胞生长状态和形成管样结构的差异,并计算细胞群体倍增时间.结果 从淋巴管瘤中分离得到MLEC.MLEC在明胶、鼠尾胶支持物上生长良好,其群体倍增时间均短于在基质胶和纤维蛋白凝胶上生长的MLEC.MLEC在4种支持物上均可以形成管样结构,在基质胶和纤维蛋白凝胶上形成的管分支数明显高于其他组(P<0.01).结论 明胶和鼠尾胶是MLEC生长的较好支持物,而基质胶和纤维蛋白凝胶是体外淋巴管形成的较好模型.  相似文献   

2.
目的:探讨抗疟药青蒿素(ART)对小鼠淋巴管内皮细胞增殖、凋亡和淋巴管形成的作用。方法:腹腔注射不完全弗氏佐剂诱导小鼠淋巴管瘤形成,分离并培养小鼠淋巴管内皮细胞(LEC)。采用MTT法检测ART对LEC的生长抑制作用。倒置相差显微镜和Hoechst 33258荧光染色观察细胞核形态学变化。FITC-Annexin V/PI双染流式细胞仪检测LEC细胞凋亡率。基质胶实验检测LEC体外淋巴管形成。结果:5-40μmol/L的ART显著抑制LEC细胞增殖。细胞经不同浓度的ART处理后,LEC细胞出现明显的凋亡特征。FITC-Annexin V/PI双染显示,与对照组比较,ART提高了LEC细胞凋亡率,具有一定的剂量依赖性效应关系。基质胶实验显示ART抑制LEC体外自发性管状结构形成。结论:青蒿素可作为抗淋巴管生成的抑制剂,其作用与其诱导LEC细胞凋亡有关。  相似文献   

3.
小鼠淋巴管瘤的诱导与组织病理学观察   总被引:4,自引:2,他引:2  
目的 建立重复性好的小鼠淋巴内皮细胞构成的良性肿瘤模型。方法 BALB/c小鼠20只腹腔注射费氏不完全佐剂2次,间隔15d,处死后对诱导出的腹腔新生组织进行组织学观察,并用免疫组织化学方法检测淋巴内皮细胞标志性抗原VEGFR-3和CD31。结果 实验小鼠中有18只(90%)膈肌腹腔面及肝脏表面出现边界清楚的多中心性的白色肿瘤样组织,光镜及透射电镜下为多管腔囊性,由内皮细胞构成,并表达CD31及VEGFR-3,观察6mo肿瘤有自限性。结论 弗氏不完全佐剂腹腔注射可稳定诱导小鼠腹腔淋巴管瘤。  相似文献   

4.
章必成  王俊  赵勇  郭燕  饶智国  高建飞 《医学争鸣》2007,28(17):1541-1543
目的:观察替代性活化的巨噬细胞(aaMphi)对淋巴管内皮细胞(LEC)增殖的影响机制.方法: 以重组小鼠IL-4处理小鼠RAW264.7巨噬细胞24 h,建立aaMphi模型.采用Transwell系统共培养aaMphi和小鼠LEC,台盼蓝拒染法绘制LEC生长曲线,3H-TdR掺入法观察LEC增殖状况,实时定量RT-PCR法分别检测共培养前后血管内皮生长因子(VEGF)-C,VEGF-D mRNA在aaMphi中的表达,以及VEGFR-3,Prox1 mRNA在LEC中的表达.结果: 与aaMphi共培养后,LEC生长速度加快,增殖指数(PI)高于其他对照组.与共培养前比较,aaMphi表达VEGF-C mRNA增加(P《0.01),但表达VEGF-D mRNA无统计学变化(P》0.05);LEC表达VEGFR-3和Prox1 mRNA均增加(P《0.01, P《0.05).结论: aaMphi能促进LEC增殖; aaMphi表达VEGF-C mRNA和LEC表达VEGFR-3, Prox1 mRNA增加是其作用机制之一.  相似文献   

5.
刘勇  杨继红 《四川医学》2011,32(6):814-816
目的比较VEGFR-3、LYVE-1在胃癌组织中的表达,选择较为可靠的淋巴管内皮标志物。方法利用免疫组织化学方法检测CD34、VEGFR-3和LYVE-1在53例胃癌组织及正常胃粘膜组织中的表达,并进行微淋巴管密度(lymphatic vessel density,MLD)及微血管密度(microvessel density,MVD)计数;与公认的血管内皮标志物CD34作比较,评价VEGFR-3和LYVE-1两种淋巴管内皮标志物的表达情况。结果 CD34和VEGFR-3阳性脉管密度具有相关性(r=0.387,P=0.003);而LYVE-1与CD34阳性管数不相关(r=-0.181,P=0.232),表明VEGFR-3阳性管多数是血管,LY-VE-1阳性管多数是淋巴管而极少数是血管,提示LYVE-1是较为特异的淋巴管内皮标志物。结论 LYVE-1是较为特异的淋巴管内皮标志物,肿瘤瘤周淋巴管生成可能促进了淋巴结转移的发生。  相似文献   

6.
目的 探索一种新的人结肠腺癌淋巴管生成裸鼠动物模型.方法 在建立人结肠腺癌皮下移植瘤基础上构建人结肠腺癌裸鼠原位移植瘤裸鼠模型,通过淋巴管内皮细胞标记LYVE-1、D2-40和淋巴管生成因子VEGF-C、VEGF-D及其受体VEGFR-3的免疫组化、Western blot和荧光定量RT-PCR检测以鉴定是否为肿瘤淋巴管生成.结果 与结肠阴性对照组即无瘤组比较,结肠原位种植瘤中呈LYVE-1、D2-40免疫组化染色强阳性的管道管壁较薄、管腔大而不规则或呈塌陷状,微淋巴管密度(LMVD)高,符合毛细淋巴管形态学特征;而且LYVE-1、D2-40蛋白和mRNA表达明显升高(P<0.01);同时,结肠原位种植瘤的VEGF-C,VEGF-D和VEGFR-3蛋白和mRNA表达亦明显高于无瘤组(P<0.01),支持肿瘤淋巴管生成的VEGF-C,-D/VEGFR-3信号调控机制.结论 裸鼠结肠癌原位种植瘤存在淋巴管生成.该肿瘤淋巴管生成模型可作为一种新的人结肠腺癌淋巴管生成动物模型,为深入研究结直肠癌淋巴管生成和转移机制、药物干预及抗淋巴转移治疗提供参考.  相似文献   

7.
为研究小鼠胶原性关节炎(CIA)模型的制作并建立评价方法,用皮内注射完全弗氏佐剂的方法建立小鼠CIA模型。容积法检测小鼠足爪炎症的肿胀度并进行评分;分光光度计法检测前列腺素(PGE);^3H-TdR掺入法检测脾淋巴细胞增殖反应、白细胞介素-1(IL-1)和IL-2;HE染色法对关节组织作病理检查。结果发现,小鼠足爪的炎症反应强烈,关节肿胀明显;前列腺素产生加剧,T、B淋巴细胞增殖反应、IL-1、IL-2水平显著升高;病理检查关节组织可见其纤维组织增生,水肿,粘液样变,伴有大量炎性细胞浸润,局部血管充血,血管壁增厚。表明皮内注射完全弗氏佐剂建立小鼠CIA模型成功。  相似文献   

8.
青蒿素对小鼠Lewis肺癌移植瘤生长和淋巴管生成的影响   总被引:3,自引:0,他引:3  
目的:探讨抗疟药青蒿素对Lewis肺癌生长和淋巴管生成的作用.方法:通过接种(sc)Lewis肺癌细胞建立C57BL/6小鼠Lewis肺癌移植瘤模型,灌胃给予50 mg/kg的青蒿素,1次/2 d,连续给药2 wk;游标卡尺观察给药后肿瘤体积变化. 接种后第30 d处死动物,收集肿瘤组织和双肺组织,并称质量. 免疫组化检测瘤内和瘤周VEGFR-3和LYVE-1表达,计数LYVE-1阳性淋巴管并计算微淋巴管密度,HE染色肺组织计数肺转移结节数,观察荷瘤小鼠的存活率.结果:与对照组比较,青蒿素组瘤内LMVD,肺湿重,肺转移发生率和肺转移结节数均较低(P<0.05);青蒿素治疗组与对照组移植瘤生长没有明显差异(P>0.05);青蒿素治疗组小鼠存活率与对照组比较明显增加(P<0.01).结论:青蒿素可有效抑制Lewis肺癌淋巴管生成和肺转移,并提高小鼠存活率.  相似文献   

9.
目的观察小鼠移植瘤内毛细淋巴管的形态结构,探讨肿瘤内淋巴管新生机制。方法将小鼠肝癌细胞株(H22)接种于昆明小鼠腹股沟区皮下,采用免疫组化法检测VEGF-C.和VEGFR-3在肿瘤内的表达;透射电镜观察肿瘤内淋巴管的超微结构。结果肿瘤细胞有VEGF-C阳性表达,且强度与肿瘤进展相关。毛细淋巴管内皮细胞有VEGFR-3阳性表达。透射电镜下,肿瘤周边区可见3种类型的毛细淋巴管,且内皮细胞细胞器发生改变。结论肿瘤细胞可能通过VEGF-C与VEGFR-3的作用诱导淋巴管内皮细胞增殖,在肿瘤周边形成新生淋巴管。  相似文献   

10.
目的:初步探讨有自发淋巴转移特性的肝癌细胞对淋巴内皮细胞增殖的影响。方法:弗氏不完全佐剂诱导Balb/c小鼠腹腔良性淋巴管瘤,分离瘤体消化法体外培养淋巴内皮细胞;H22细胞接种Balb/c小鼠腹腔,收集腹水制成H22条件培养液,观察其对淋巴内皮细胞生长和表达flt-4、c-fos、PCNA的影响。结果:小鼠淋巴管瘤来源的淋巴内皮细胞可成单层贴壁培养,在内皮细胞完全培养液和H22条件培养液作用下可增殖达到或接近铺满状态,并阳性表达flt-4、c-fos、PCNA,普通培养液不能支持细胞生长,flt-4等染色为阴性:结论:淋巴内皮细胞增殖可能是癌细胞淋巴路转移的必要条件。  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.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

20.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

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