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1.
目的:探讨在心脏移植中心肌及血管病变的发生和发展情况,为预防和治疗移植排斥反应提供理论依据。方法:采用颈部心脏移植模型,用供体脾细胞(SPC)和环磷酰胺(CP)预处理受体,H-E、Masson三色、VanGieson和免疫组化平滑肌细胞染色,对移植心脏的浸润细胞,心肌纤维化和移植心脏动脉硬化进行分析研究。结果:经SPC和CP预处理后,移植心脏的存活时间明显延长,炎性细胞浸润,心肌纤维化和心脏动脉硬 相似文献
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目的:研究血管细胞粘附分子-1(VCAM-1)在心脏移植慢性排斥反应中的表达及作用。方法:采用供体脾细胞(SPC)和环磷酰胺(CP)预处理移植受体,然后行异位心脏移植术,采用免疫组织化学法检测移植心脏中VCAM-1的表达。结果:SPC和CP预处理后,移植心脏的存活时间明显延长,VCAM-1的表达水平明显减低;而VCAM-1在急性排斥反应和环孢霉素A(CsA)治疗组中的表达均较SPC和CP预处理组明显增强(P<0.01)。急性排斥反应与CsA治疗组比较,其差异无统计学意义(P>0.05)。结论:VCAM-1的表达水平与排斥反应的程度成正相关,测定受体VCAM-1的水平可以预测移植器官的功能状况,从而为慢性排斥反应的早期诊断和预防提供依据。 相似文献
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目的 观察供体脾细胞(SPC)与环磷酰胺(CP)联合预处理对大鼠移植心脏存活时间的影响.方法 应用大鼠颈部心脏移植模型,实验分为对照组(未干预组)、CsA组、SPC CP组.CsA组心脏移植后予环孢霉素A(CsA)10 mg/kg,SPC CP组采用供体SPC和CP预处理移植受体,然后行大鼠颈部心脏移植术.观察移植心脏存活情况及组织病理变化.结果 对照组、CsA组、SPC CP组移植心脏存活时间分别为(7.2±2.4)、(15.8±4.3)、(30.4±10.7)天;组织病理检查显示,经SPC PC预处理的移植心脏排斥反应明显减弱.结论 SPC和CP预处理可以诱导受体对移植物的免疫耐受,延长移植心脏的存活期,效果优于CsA. 相似文献
4.
目的探讨调节活化正常T细胞表达和分泌因子(RANTES)及其受体CCR5在心脏移植慢性排斥反应中的表达及意义。方法健康近交系Sprague-Dawley(SD)大鼠为受者,Wistar大鼠为供者,采用"套管连接技术"建立颈部心脏移植的实验模型。将SD大鼠随机分为3组:A组(n=12)供、受者均未采用任何治疗;B组(n=12)移植手术后使用环孢素A(CsA)10 mg.kg-1治疗受者,术后2~3个月采集移植心脏;C组(n=24)使用供者脾细胞(SPC)及环磷酰胺(CP)预处理受者,其中12只在术后15~60 d采集移植心脏(C1组),另外12只术后至少观察半年(C2组)。采用H-E染色观察移植心脏组织排斥反应病理改变程度,Van Gieson染色观察移植心脏血管病变(CAV)的血管狭窄程度,免疫组化检测RANTES和CCR5的表达水平。结果 SPC和CP预处理后,移植心脏的存活时间明显延长,RANTES和CCR5在冠状血管和心肌组织中呈低水平表达,移植心脏血管病和心肌纤维化明显减轻;而在急性排斥反应和CsA治疗的移植心脏组织中,RANTES和CCR5的表达水平明显增强,差异有统计学意义(P<0.05)。结论移植心脏组织中RANTES和CCR5的表达水平与移植排斥反应的程度密切相关。 相似文献
5.
目的研究细胞间黏附分子1(ICAM-1)与血管细胞黏附分子1(VCAM-1)在心脏移植慢性排斥反应中的表达及作用。方法采用供体脾细胞(SPC)和环磷酰胺(CP)预处理移植受体,然后行异位心脏移植术,免疫组织化学检测移植心脏中VCAM-1和ICAM-1的表达。结果SPC和CP预处理后,移植心脏中ICAM-1、VCAM-1的表达水平明显减低,而ICAM-1和VCAM-1在急性排斥反应和环孢素A(CsA)治疗组中的表达明显增强(均P〈0.05)。急性排斥反应与CsA治疗组比较差异无统计学意义。结论ICAM-1和VCAM-1的表达水平与心脏移植排斥反应的程度密切相关。 相似文献
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目的研究雷帕霉素在大鼠移植心脏血管病变中的作用。方法建立大鼠腹腔心脏移植模型。异系移植以近交系Wistar大鼠为供体,SD大鼠为受体,随机分为雷帕霉素组(以雷帕霉素每天1.25 mg/kg灌胃)和环孢霉素组(以环孢霉素A每天10 mg/kg灌胃),于移植后90天留取移植心脏待检;同系移植组以Wistar大鼠作供、受体,行心脏移植未行抗免疫排斥治疗。假手术组为仅做腹部开关手术的Wistar大鼠。采用HE、Van Gie-son染色分析移植心脏血管狭窄的情况。结果假手术组心肌无炎性细胞浸润,冠状血管无狭窄。同系移植心脏无明显炎性细胞浸润,血管内膜稍增厚,管腔无狭窄。环孢霉素组可见冠状动脉管腔明显狭窄,血管壁及心肌内均可见大量炎性细胞浸润,心肌变性坏死,心肌纤维化。雷帕霉素组冠状血管狭窄程度及炎性细胞浸润情况明显减轻,与环孢霉素组比较差异有显著性(P<0.01)。结论雷帕霉素具有预防大鼠心脏移植物血管病变的作用。 相似文献
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目的 探讨单核细胞趋化蛋白-1(MCP-1)在心脏移植排斥反应中的表达及意义,并研究核因子-κB(NF-κB)通路在其中发挥的作用。方法 近交系SD大鼠为受体,Wistar大鼠为供体,“套管连接技术”行颈部心脏移植术。将SD大鼠随机平均分为4组,急性排斥组:受体未采用任何治疗;CsA组:移植术后环孢霉素A(CsA) 10mg/kg治疗受体,术后60~90d采集移植心脏;免疫耐受组:采用Wistar大鼠脾细胞(SPC)和环磷酰胺(CP)预处理SD大鼠,14d后行颈部心脏移植术;PDTC组:移植术后腹腔注射吡咯二硫氨基甲酸酯(PDTC)100mg/kg,1次/d,连续15d。Masson染色观察移植心脏纤维化程度,免疫组化及Western blotting检测MCP-1的表达。结果 急性排斥组、CsA组、免疫耐受组和PDTC组移植心脏存活时间分别为(6.53±2.48)d、(93.51±20.07)d、 (201.42±40.36)d和(142.37±24.64)d,PDTC组明显高于CsA组和急性排斥组(P<0.05),且心肌纤维化程度明显减轻。各组MCP-1表达的积分光密度(IOD)值依次为(1.86±0.23)、(1.58±0.16)、(0.57±0.15)及(1.16±0.28),免疫耐受组明显低于其他3组,PDTC组显著低于急性排斥组和CsA组(P<0.05)。结论 MCP-1的表达与排斥反应程度呈正相关,测定MCP-1的水平可预测移植心脏的功能状况;抑制NF-κB通路可减少MCP-1表达,明显减轻心脏移植排斥反应。 相似文献
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目的:检测结缔组织生长因子(connective tissue growth factor,CTGF)在大鼠移植心脏急性排斥期(acute rejection,AR)的表达,并探讨其与移植心脏心肌纤维化的关系.方法:取Wister大鼠16只作为供体,取SD大鼠16只作为受体,进行腹部异位心脏移植,采用10 mg/(kg·d) 环孢霉素A,40 mg/(kg·d)骁悉和3 mg/(kg·d)甲泼尼龙三联免疫抑制疗法,2周后取其中10例移植心脏标本作为实验组,10例健康Wister大鼠心脏标本作为对照组(normal heart,NH).采用HE及van Gieson染色观察心肌病理形态、心脏血管狭窄程度;并进行纤维化的半定量评分.采用免疫组化半定量方法检测CTGF在心脏组织中的表达,并分析其与心肌纤维化的相关性.结果:移植心脏血管壁及心肌间质组织内有大量粒细胞浸润,呈典型的急性排斥反应期改变;移植心脏血管内膜及大量纤维组织增生,与正常对照组相比,差异有统计学意义(P<0.05);CTGF在移植心脏组织中有明显表达,且主要表达于血管壁及心肌损伤部位,而正常心脏无表达,CTGF灰度值为 (AR vs NH: 103.52±6.42 vs. 182.61±8.72,P<0.05).CTGF灰度值与移植心脏纤维化显著负相关(r=-0.734,P<0.01).结论:CTGF在急性移植心脏组织中有明显表达且可能与移植心脏心肌纤维化相关. 相似文献
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目的:研究辅助T细胞17(T helper cell 17, Th17)细胞及其相关因子白细胞介素17(interleukin-17, IL-17)在小鼠心脏移植排斥反应中的表达及意义。方法:建立小鼠心脏移植模型,实验动物随机分为急性排斥反应组(n=12)和同系移植组(n=12),应用酶联免疫吸附实验(enzyme-linked immunosorbent assay, ELISA)分别检测2组小鼠移植术后第3天和第7天血清中IL-17的含量;应用流式细胞技术检测移植心脏中浸润淋巴细胞中Th17细胞数量,并取移植心脏经10%甲醛固定后行常规病理检查。结果:急性排斥反应组术后第3天及第7天血清中IL-17表达明显高于同系移植组(P<0.05),且急性排斥反应组术后第7天IL-17表达明显高于第3天(P<0.05);与同系移植组相比,急性排斥反应组移植心脏浸润淋巴细胞中Th17细胞比例在术后第3天及第7天明显增高(P<0.05),且术后第7天时Th17细胞比例明显高于第3天(P<0.05);病理组织学检查急性排斥反应组随着移植时间的延长,排斥反应逐渐增强。结论:Th17与心脏移植排斥反应的发生、发展密切相关,移植脏器中细胞因子IL-17的检测可望成为急性排斥反应早期诊断的预测指标。 相似文献
10.
目的:探讨血管平滑肌肌动蛋白α(vascular smooth muscle α-actin, VSMA-α)表达变化在移植心脏血管病变及纤维化中的作用。方法:建立大鼠心脏移植模型,并将实验大鼠分为急性排斥组、慢性排斥组、同系移植组、正常心脏组。采用Masson和Van Gieson染色观察心肌的纤维化,计算血管狭窄的指数。免疫组织化学染色分析VSMA-α表达变化与心肌纤维化和血管病变的关系。结果:正常心脏组、同系移植组、急性排斥组、慢性排斥组心肌纤维化评分分别为0.00±0.00, 0.63±0.52,1.75±0.71和2.75±0.46,慢性排斥组心肌纤维化明显高于正常心脏及同系移植心脏(均P<0.01)。而冠状动脉狭窄指数分别为0.08±0.02,0.09±0.04,0.12±0.05和62.86±17.18,其中慢性排斥组移植心脏血管较其它组明显狭窄(均P<0.01)。慢性排斥组移植心脏的心肌细胞大量表达VSMA-α。 结论:血管平滑肌肌动蛋白α基因的重新激活及其蛋白的异位表达与移植心脏血管病变及心肌纤维化有关。 相似文献
11.
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
12.
Jiageng Zhu Jun Li Ruipeng Ji Jianghao Su Mingshun Shen Zhigang Cao 《南京医科大学学报(自然科学版)》2007,21(2):125-128
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
13.
Tao Ye * Zhi-quan Liu Jian-jun Mu Xi-han Fu Jun Yang Bao-lin Gao and Xiao-hong Zhang Department of Cardiology First Hospital of Xi'an Jiaotong University Xi'an Hanzhong Cardiovascular Institute Hanzhong 《中国医学科学杂志(英文版)》2004,19(4):248-251
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
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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
15.
Jingming Zhu Ningning Hui Xiuhong Jiang Huaxing Zhang Chengzhang Fu 《南京医科大学学报(自然科学版)》2007,21(6):386-389
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
16.
Objective:To investigate the gene expression of osteoprotegerin(OPG) and osteoclast differentiation factor(ODF) in the bone tissue of patients with hip fracture due to osteoporosis. Methods:OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers(over 50 years old) with hip fracture(Observer Group) and 30 cases of hip facture sufferers with no osteoporosis(Control group) were analyzed with the Semi-Quantitative RT-PCR method. Results:The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion:Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption. 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.
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
19.
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
20.
Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine
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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