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1.
李小飞  张涛  程庆书  刘锟  卢强  汪健 《医学争鸣》2005,26(2):156-156
目的:观察重组人骨形态发生蛋白(rhBMP) 2诱导犬自体原位气管移植段软骨再生过程中的剂量效应.方法:4组小鼠气 管移植段各环间软组织中植入rhBMP 2胶原缓释系统,其rhBMP 2含量分别为1,2,5和10mg.将移植段气管原位移植,4wk后 观察标本大体和组织学改变,并将测得的新生软骨面积进行比较.结果:rhBMP 2植入组移植段环间均有不同程度的软骨再生 随植入物中rhBMP 2含量的增加,新生软骨面积分别为:(1768.1±449.0),(2364.1±444.3),(3000.7±488.3),(3188.3± 388.3)pixel.4组新生软骨面积差异有显著性(F=5.246,P<0.01).结论:rhBMP-2诱导气管移植段软骨再生的作用具有剂 量效应.  相似文献   

2.
目的:将重组人骨形态发生蛋白—2(rhBMP—2)植入犬的自体及异体气管移植段内,促进新生软骨形成,比较rh—BMP—2在自体及异体气管移植段内诱导软骨再生的作用.方法:16只杂种犬随机等分为4组,颈部切去5环气管埋入腹腔大网膜中作为移植段.A.B组为自体移植.C.D组为异体移植,其中A,C组移植段植入rhBMP—2,B和D组移植段不植入任何物质作为对照。术后4wk处死动物,标本行大体及组织学观察.结果:4组移植段软骨环均有不同程度的软骨再生,且以A,C组再生更明显.结论:rhBMP—2可刺激气管移植段软骨再生,但在自体及异体移植段内的作用效果不同.  相似文献   

3.
目的 探讨用游离兔耳廓软骨修复广泛气管前壁缺损的可行性 ,并观察自体移植与异体移植的差异。方法 取新西兰大耳白兔 2 0只 ,分为自体移植组 (n=10 )与异体移植组 (n=10 ) ,取右耳游离耳廓软骨行自体或异体移植修复 8~ 10环气管前壁缺损 ,术后 1、2、4、8和 12周每组分别处死 1~ 2只行内窥镜检查、生物力学测试及组织学观察。结果  18只兔存活 ,内窥镜发现气管狭窄不明显 ,以瘢痕增生为主。生物力学测试发现 ,移植软骨单位最大应力在 0、4、8、12周分别为 2 .5 4± 0 .19、1.31± 0 .2 1、1.72± 0 .2 2和 1.96± 0 .0 8k Pa/ mm .组织学观察发现移植软骨部分发生变性和坏死 ,但存活软骨、新生软骨在术后 12周时分别占 6 2 .0 %± 3.45 %、6 5 .8%± 9.48%(自体移植组 ) ,6 0 .1%± 3.98%、5 5 .2 %± 7.5 7% (异体移植组 )。自体移植与异体移植的炎性反应差异不大 ,免疫排斥反应较轻。结论 游离耳软骨可用来修复广泛的气管前壁缺损 ,也可用作同种移植  相似文献   

4.
刘勇  李小飞  闫小龙  卢强  王律  汪健 《医学争鸣》2005,26(12):1079-1082
目的:研究不同时间段内骨形态发生蛋白诱导犬自体移植气管软骨再生的作用.方法:36只杂种犬,随机分为A,B两组,颈部切去5个气管环,A组气管环间植入重组人骨形态发生蛋白2/胶原复合物,B组为空白对照组,然后植入自体腹腔大网膜中.在术后1,2,3,5,9,12wk分别从两组中各取3例移植段气管行组织学检查和骨钙素(BGP)的放免测定.结果:rhBMP2植入区内软骨再生存在于移植后的各个时间段,且以术后2wk至5wk较为明显.两组标本BGP水平测定均随着时间的延长而增高,除术后1wk无显著性差异(P>0.05),其余各时间段两组差异均有显著性(P<0.05).结论:rhBMP2可诱导气管移植段软骨再生,但在不同时间段的作用效果不同.  相似文献   

5.
深低温冷冻对rhBMP-2诱导犬气管移植体软骨再生的影响   总被引:2,自引:2,他引:0  
闫小龙  李小飞  刘勇  卢强  王律 《医学争鸣》2005,26(2):160-163
目的: 研究应用重组人骨形态发生蛋白-2 (rhBMP-2)/胶原缓释系统诱导犬冷冻气管移植软骨再生的作用.方法: 将32只杂种犬随机等分为4组,行5个颈部气管环原位异体移植,带血管蒂大网膜包绕.A组为未冷冻组,气管环间植入rhBMP-2/胶原组标记为A1组,空白对照标记为A2组;B组术前将移植体气管经深低温液氮保存2 mo,处理同A组,分别标记为B1、B2两组.所有实验犬于术后8 wk处死,行大体及病理学检查,评测各组新生软骨面积. 结果: B组犬移植气管结构保持较好、狭窄程度低.4组均有软骨再生, B1组新生软骨面积1835.9(527.2)高于A1组1408.5(492.6)及B2组336.8(121.3),各组新生软骨面积差异有显著性(χ2 = 24.010 ,df=3 ,P <0.01).结论: 应用rhBMP-2可刺激冷冻气管移植体软骨再生,其刺激深低温冷冻犬气管移植体成骨效果优于未冷冻气管移植体.  相似文献   

6.
王律  李小飞  卢强  程庆书  刘勇  阎小龙  徐鉷 《医学争鸣》2005,26(12):1075-1078
目的: 明确局部应用骨形成蛋白-2(BMP-2)对犬同种异体移植段气管碱性磷酸酶(ALP)活性的影响.方法: 将西安地区健康雄性杂种犬40只随机平均分为实验组与对照组,两组间动物各取一6环颈段气管,交换后原位移植,应用犬双侧胸骨舌骨肌-胸骨甲状肌联合肌瓣包裹移植段气管提供良好血运,试验组在移植段气管环间注射BMP-2/I型胶原复合物,对照组仅注射I型胶原作为空白对照,术后2,4,8,12 wk分别处死实验动物,取移植段气管标本,观察其大体形态,HE染色观察软骨环的微观变化;改良钙-钴法测定移植段软骨组织中碱性磷酸酶的分布.结果: 术后4 wk后实验组移植段气管通畅度高于对照组(0.84±0.04, P<0.05); HE染色发现各个时间点两组移植段软骨细胞密度无显著性差异( P>0.05);应用图像分析软件计算切片染色阳性的像素面积,发现在术后8 wk及以前,试验组动物的碱性磷酸酶染色阳性面积比例明显高于对照组(0.29±0.02,P<0.05),术后12 wk两者的差别无统计学意义(P>0.05).结论: BMP-2可以提高移植段气管软骨碱性磷酸酶表达,增强气管软骨的钙化,维持移植段气管环状软骨形态及气管环的稳定,为临床应用同种异体气管移植解决大段气管缺失奠定基础.  相似文献   

7.
自体骨骼肌卫星细胞移植治疗心肌梗死后心衰的实验研究   总被引:2,自引:1,他引:1  
目的 :研究骨骼肌卫星细胞植入梗死区心肌组织后对心功能的影响 .方法 :幼猪 10只 ,对照组和治疗组各 5只 .治疗组从幼猪三角肌群处切取骨骼肌标本 ,获取卫星细胞 ,体外培养扩增 ,结扎冠状动脉建立幼猪的急性心肌梗死模型 ,通过局部注射的方法将卫星细胞植入梗死周边区及梗死区心肌 .对照组以同样的方法建立心肌梗死模型 ,予以等量的、不含卫星细胞的培养液接种 ,观察移植 4wk后卫星细胞移植对心功能的影响 .结果 :卫星细胞接种培养后 4 8h开始贴壁 ,细胞呈梭形 ,将细胞培养液中胎牛血清浓度降至 2 0mL·L-1以下时 ,细胞生长停滞 ,相互融合形成肌管 ;HE染色治疗组梗死区可见岛状、带横纹的肌肉组织 ,肌细胞核位于周边 ,光镜及电镜移植细胞及移植细胞与宿主细胞之间均未见闰盘连接 ;对照组梗死区为均匀一致的纤维疤痕组织 ;对照组 1wk左室射血分数 (LVEF)为 (2 3± 2 ) % ,4wk为 (33± 2 ) % ,治疗组 1wk为 (2 6± 3) % ,4wk为 (4 0± 2 ) % ,治疗组与对照组 1wk比较 ,无统计学差异 (P >0 .0 5 ) ;而 1wk与 4wk比较 ,有统计学差异 (P <0 .0 0 1) ,治疗组与对照组 4wk比较 ,LVEF有统计学差异 (P <0 .0 1) .治疗组 1wk与 4wk比较 ,1/3充盈分数 (1/3FF)有统计学差异 (P <0 .0 5 ) .结论 :骨骼肌卫星细胞植入  相似文献   

8.
目的 :比较不同处理方式的深低温冷冻同种异体皮质骨修复兔大段负重骨缺损的组织计量学效果 ,为临床大段负重骨缺损的重建提供新方法。方法 :4 0只新西兰大白兔随机分为 5组 ,造成左侧股骨中上段缺损 2cm的模型 ,分别采用重组人骨形态发生蛋白 2 (rhBMP 2 )和Ⅰ型可吸收胶原海绵 (ACS)对各组移植骨进行处理 ,其中A组植入异体骨 +rhBMP 2 +ACS ,B组植入异体骨 +rhBMP 2 ,C组植入异体骨 +ACS ,D组单纯植入异体骨 ,E组植入自体骨。术后 1 2周处死动物 ,移植骨和宿主骨远、近结合部及移植骨中段分别取材 ,做不脱钙磨片 ,在荧光显微镜和普通光镜下测量新骨形成率、骨孔隙率、骨单位半径和哈佛氏管直径。结果 :A组在新骨形成率、骨孔隙率、骨单位半径和哈佛氏管直径等方面均优于B、C、D组 ,与E组相仿。结论 :同种异体皮质骨、rhBMP 2和ACS复合移植具有高效持续的骨诱导作用 ,能平衡骨吸收 /骨形成活动 ,移植骨愈合质量好 ,是修复大段负重骨缺损的好方法。  相似文献   

9.
大鼠发育过程中海马CA1区nNOS的表达   总被引:2,自引:0,他引:2  
目的 :研究出生后不同发育阶段大鼠海马CA1区nNOS的表达及形态学变化 ,分析nNOS的表达与海马神经元的发育、突触的形成及海马学习记忆功能的关系 .方法 :用免疫组织化学方法和图像分析对生后 1,2 ,3,4wk和 3mo龄及老龄 (2 4~ 2 8mo)大鼠海马CA1区nNOS的表达进行定位和定量分析 ,并进行光、电镜形态学检查 .结果 :大鼠海马CA1区nNOS免疫阳性细胞面数密度 :2wk (36 .2± 4 .2 )mm-2 和 3wk (33.1± 4 .1)mm-2 组高于 1wk (2 4 .9± 4 .8)mm-2 ,4wk(2 4 .6± 5 .9)mm-2 ,3mo (2 5 .4± 5 .6 )mm-2 和老龄组 (2 4 .3± 8.3)mm-2 (P <0 .0 1) ,而前两组之间及后 4组之间均无显著差异 (P >0 .0 5 ) .nNOS免疫阳性细胞积分吸光度值 :以 2wk(8.5± 2 .2 )和 3wk (8.1± 1.9)组为最高 ,其次为 4wk (4.9± 0 .5 )和 3mo (5 .2± 0 .9)组 ,1wk(3.3±0 .8)和老龄组 (3.2± 0 .7)最低 (P <0 .0 1) ;2wk和 3wk组之间、4wk与 3mo组之间、1wk和老龄组之间均无显著差异(P >0 .0 5 ) .结论 :NO与海马的发育、突触的形成和成熟以及学习记忆具有密切关系 .  相似文献   

10.
移植气管软骨再生的实验   总被引:2,自引:0,他引:2  
目的 研究同种异体移植气管软骨的再生能力。方法 将供体犬气管置于受体犬腹腔内,以带蒂大网胞包绕,分别在术后1,2,3,4,5,6,7,8及12wk时,共9个时间段将移植段气管取出作病理及透射电镜检查,部分标本软骨用^3H-TDR(^3H-脱氧胸苷)标记,行放射自显影检查。结果 软骨再生存在于移植后的各个时间段的气管软骨膜下,其再生的程度与良好的血液循环有关。结论 同种异体气管移植,血液循环充分建立的条件下,软骨具有良好的再生能力。  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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