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1.
目的:研究自然杀伤(NK)细胞在单倍体相合骨髓移植中对移植物抗宿主病(GVHD)及造血重建的影响. 方法: 以近交系Balb/c(H-2d)×C57BL/6(H-2b)杂交F1代小鼠(H-2d/b)为供鼠、Balb/c(H-2d)为受鼠,在移植物中增加供者的外周T细胞和(或)NK细胞进行半相合骨髓移植,根据临床表现、病理检查及外周血白细胞(WBC)数,比较不同移植组GVHD发生及造血重建情况. 结果: 骨髓 T细胞组中90%的小鼠出现GVHD,外周血WBC平均在移植后4 wk恢复正常;而骨髓 T 低浓度NK细胞组中20%小鼠出现GVHD, 外周血WBC平均在移植后3 wk恢复正常;骨髓 T 高浓度NK细胞组中仅10%出现GVHD,外周血WBC也平均在移植后3 wk恢复正常. 后两组较骨髓 T细胞组GVHD发生率显著下降(P<0.01),外周血WBC恢复时间显著提前(P<0.01). 结论:在小鼠单倍体相合骨髓移植中,同种反应性NK细胞可降低GVHD发生率,促进造血重建.  相似文献   

2.
目的:观察同异基因小鼠脾细胞输注比例和输注量在混合半相合骨髓移植中对移植物抗宿主病(GVHD)和嵌合状态的影响.方法:受鼠全身照射后,经尾静脉回输同基因和半相合异基因供鼠骨髓及两者不同比例脾细胞.A组未加入异基因供鼠脾细胞,B组加入的同异基因供鼠脾细胞量相等,C组加入异基因供鼠脾细胞量是同基因供鼠脾细胞量的两倍.回输后观察GVHD临床表现,取肝、皮肤、小肠送病理学检查评定GVHD分级.测定 70天、 150天嵌合率.监测造血重建和受鼠生存率.结果:混合骨髓移植各组小鼠生存期均超过50天.其中A组,临床和病理无GVHD表现, 150天嵌合水平大幅度下降.B组,临床和病理无明显GVHD表现, 150天嵌合水平中等幅度下降.C组病理有GVHDⅡ级表现, 150天嵌合水平下降不明显.半相合骨髓移植对照组小鼠出现典型的GVHD临床和病理表现,仅20%小鼠生存期超过50天.结论:小鼠混合半相合骨髓移植中,同异基因小鼠脾细胞输注比例和输注量对移植排斥和GVHD有协调作用.  相似文献   

3.
目的用同种异基因骨髓移植诱导小鼠急性移植物抗宿主病(GVHD)模型,研究GVHD与同种记忆性CD8~ T细胞的关系。方法供鼠C3H.SW(H-2D~b,CD45.2~ )和受鼠B6/SJL(H-2D~b,CD45.1~ ),两者MHC抗原均为H-2D~b,但供受鼠之间miHAs有差异。小鼠致死剂量辐照后移植供鼠T~-BM CD8~ T细胞,构建CD8~ T细胞依赖的GVHD模型。观察受鼠体重和生存率变化;流式细胞仪检测受鼠肝脏和脾脏中供鼠来源CD8~ T细胞的浸润数、分泌INF-γ的效应CD8~ T细胞数和与凋亡相关的annexin V分子在CD8~ T细胞的表达情况。结果建立的CD8~ T细胞依赖的致死性急性GVHD小鼠模型,移植后小鼠体重显著下降并有大幅波动,其变化与分泌INF-γ的CD8~ T细胞数量成反比。移植后28d小鼠逐渐出现死亡,70d时死亡率达58%(7/12)。随着GVHD病程的进展,供鼠CD8~ T细胞表现出典型的记忆性T细胞应答的过程,即扩增、凋亡紧缩和残存T细胞的再扩增;分泌INF-γ的效应性CD8~ T细胞也表现出同样的变化;细胞表面凋亡相关分子的表达显示CD8~ T细胞的减少与凋亡的发生有关。结论在模拟目前临床病人采用的同种异基因骨髓移植配型方式的同种异基因骨髓移植小鼠模型中,供者来源的效应性记忆性CD8~ T细胞数量的波动与记忆性T细胞产生过程中数量的变化关系极为密切、受鼠的体重变化与效应性CD8~ T细胞浸润数量的波动成反比的现象说明,在GVHD发生过程中有抗原特异性记忆性CD8~ T细胞形成。  相似文献   

4.
目的探讨TJU103对小鼠同种异基因造血干细胞移植模型移植物抗宿主病(GVHD)是否起预防作用。方法(1)用单向混合淋巴细胞培养方法检测TJU103对T淋巴细胞增殖的影响;(2)以BALB/c(H-2d)、CB6F1(H-2d/b)分别作为完全异基因移植和半相合基因移植的受鼠,给予9.0Gy全身照射后4h,单纯照射组经尾静脉注射0.3mlD-Hank's液,不进行细胞移植;对照组经尾静脉注射C57BL/6小鼠混合细胞悬液(4.5×106骨髓细胞 3.0×107脾细胞),但不进行其他治疗处理;实验组经尾静脉注射C57BL/6小鼠混合细胞悬液(4.5×106骨髓细胞 3.0×107脾细胞) TJU103(终浓度25μg/ml),此后腹腔注射TJU10350μg/d,共7d,然后观察其造血恢复、植入及GVHD的情况。结果(1)TJU103可以显著抑制T细胞活化增殖,其抑制作用呈剂量依赖性,在25μg/ml浓度时,可以抑制83%细胞增殖。(2)由于没有给予GVHD防治措施,对照组受鼠GVHD的发生率和死亡率分别为10/10和10/10;而完全异基因移植实验组小鼠GVHD发生率仅为2/10,30d生存率增加至8/10(P<0.01),中位生存期延长至30d以上(P<0.01);半相合基因移植实验组小鼠GVHD发生率为1/10,30d生存率增加至9/10(P<0.01),中位生存期延长至30d以上(P<0.01)。结论TJU103不仅可以显著抑制体外T淋巴细胞增殖效应,而且可显著降低小鼠同种异基因造血干细胞移植模型GVHD的发生率。  相似文献   

5.
目的 研究有效诱导异种骨髓移植耐受的方法和对异基因骨髓移植重建的影响。方法 将C57BL 6J小鼠辐射后 ,尾静脉注射 1× 10 7个BALB c小鼠骨髓细胞 (输入骨髓细胞前 4h ,注射供鼠的活化NK细胞 ) ,观察生存期、体重、病理组织学等指标。结果 经骨髓及NK细胞输注的小鼠能显著提高受体小鼠的生存率 ,减轻移植物抗宿主病 (GVHD)的病理伤害程度。结论 在小鼠异基因骨髓移植初期 ,输入供鼠的NK细胞和骨髓细胞 ,能促进造血重建 ,预防移植物抗宿主病的发生  相似文献   

6.
目的 探讨父方否决细胞对小鼠半相合干细胞移植模型移植物抗宿主病(GVHD)是否起预防作用.方法 以B6CF1(H-2 b/d)作为半相合干细胞移植的受鼠,给予9.0 Gy全身照射后4 h,单纯照射组经尾静脉注射0.3 ml D-Hank's 液,不进行细胞移植;对照组经尾静脉注射C57BL/6小鼠混合细胞悬液(4.5×106骨髓细胞 3.0×107脾细胞),但不进行其他治疗处理;实验组于移植4 d后经尾静脉注射BALB/c小鼠脾细胞悬液(数量分别为5.0×106、1.0×107),然后观察其造血恢复、植入及移植物抗宿主病(GVHD)的情况.结果 由于没有给予GVHD防治措施,对照组受鼠GVHD的发生率和死亡率分别为10/10和10/10;而1/6量否决细胞组小鼠GVHD的发生率为5/10,30 d生存率增加至5/10(P<0.01),5只因GVHD死亡的受鼠中位生存期为20 d,较对照组(中位生存期14 d)有显著性差异(P<0.05);1/3量否决细胞组小鼠GVHD的发生率为2/10,30 d生存率增加至8/10,中位生存期延长至30 d以上(P<0.05).结论 半相合干细胞移植后输注父方否决细胞,可以诱导特异性免疫耐受,显著降低半相合干细胞移植GVHD的发生率.  相似文献   

7.
目的:建立单倍型骨髓移植小鼠模型,观察单倍型骨髓移植小鼠移植物抗宿主病(GVHD)靶器官的组织病理表现及器官特异性T细胞受体克隆表达.方法:建立单倍型异基因移植小鼠GVHD模型,进行移植前后GVHD靶器官的病理分析,同时应用RT-PCR扩增小鼠肝脏、皮肤、结肠、肾脏等组织移植前、后T细胞受体β链可变区(TCRBV)20个家族的基因序列,通过基因扫描判断TCRBV家族的克隆表达和CDR3克隆的性质.结果:单倍型骨髓移植小鼠在移植后14 d临床开始出现典型的GVHD表现.移植后24 d受鼠肝脏、皮肤、远端回肠等均出现典型的GVHD病理表现,在其T细胞受体谱型图上出现了分属TCRBV家族的单克隆或寡克隆增生的T细胞,而肾脏等非GVHD靶器官中浸润的淋巴细胞为多克隆的T细胞增生.结论:单倍型骨髓移植小鼠在移植后14 d出现典型的GVHD表现,GVHD靶器官出现的T细胞单克隆及寡克隆增生可能与GVHD的发生相关.  相似文献   

8.
目的:观察骨髓间充质干细胞(BMMSC)对急性淋巴细胞白血病(ALL)小鼠异基因骨髓移植(allo-BMT)后移植物抗宿主病(GVHD)和移植物抗白血病(GVL)的影响。方法:以ALL小鼠为动物模型,对其进行al-lo-BMT的同时,静脉输注经体外培养的供鼠BMMSC,同时设立单纯allo-BMT对照组。流式细胞仪检测受鼠CD4+、CD8+T细胞亚群的差异;记录受鼠存活时间;观察受鼠发生GVHD一般反应及病理学变化。结果:BMMSC减少受鼠CD4+T细胞数量的同时增加CD8+T细胞的数量;明显延长ALL小鼠allo-BMT后的生存时间;推迟GVHD发生的时间。结论:BMMSC与allo-BMT联合移植具有一定的GVL;BMMSC能抑制ALL小鼠allo-BMT后GVHD的发生,但同时具有一定程度的GVL。  相似文献   

9.
方烨  刘文超  薛妍  张红梅  黄颖  斯晓明  程捷 《医学争鸣》2006,27(17):1566-1569
目的:建立荷瘤小鼠非清髓异基因骨髓干细胞移植模型,探讨不同成分的供者淋巴细胞输注(DLI)对移植效果的影响及抗肿瘤机制. 方法: 受者鼠为Balb/c(H-2Kd)小鼠,供者鼠为C57bl/6(H-2Kb)小鼠,受者小鼠腹腔接种小鼠肝癌细胞株H22细胞,观察腹水生成情况及生存状况. 于接种瘤细胞后d5给予全身照射预处理,随后给受者小鼠尾静脉输注供者鼠的骨髓细胞,建立荷瘤小鼠的MHC不相合亚移植模型. 依据不同DLI将荷瘤鼠受者鼠随机分为A,B,C,D,E组,每组10只. A,B,C,D组均给予预处理,A组预处理后于移植d1,7给予供者小鼠全脾细胞0.5×107个;B组分别于移植d1,7给予去除CD8 细胞供者鼠脾细胞0.5×107个;C组于移植d1,7给予去除CD4 细胞供者鼠脾细胞0.5×107个;D 组只接受预处理不作移植及DLI;E组为对照组,既不作预处理,也不接受骨髓细胞移植及DLI. 观察各组成瘤率、生存期、嵌合状态、造血恢复情况及移植物抗宿主病(GVHD). 结果:所有小鼠均产生腹水,成瘤率100%;生存期C组最长为(35.6±3.1)d,B组为(23.7±10.9)d,B,C两组相比有统计学差异(P<0.05);接受移植的A,B,C组嵌合率均高于0.80,只接受预处理的D组鼠白细胞计数自行恢复正常;GVHD评分C组与B组有明显差异(P<0.05). 结论:建立非清髓荷瘤小鼠异基因骨髓干细胞移植模型条件适宜,说明去除CD4 细胞的DLI能够有效地减轻GVHD反应,延长荷瘤鼠生存期;去除CD8 细胞的DLI会加重GVHD反应,影响移植.  相似文献   

10.
目的评价供者CCR5在经过强化预处理的骨髓移植动物模型受者体内的作用,为异基因造血干细胞移植的临床应用提供科学依据。方法经过致死剂量照射的BALB/C小鼠接受异基因C57BL/6小鼠骨髓移植。根据回输的细胞不同分为4组:1)B6 CCR5 KO组,受者接受C57BL/6 CCR5-/-小鼠骨髓和脾脏细胞;2)B6 WT组,受者接受野生型C57BL/6小鼠骨髓和脾脏细胞;3)B6 CCR5 KO BMC组,受者只接受C57BL/6 CCR5-/-小鼠骨髓细胞;4)B6 WT BMC组,受者只接受野生型C57BL/6小鼠骨髓细胞。结果与B6 WT组比较,B6 CCR5 KO组小鼠以更快的速度死于急性移植物抗宿主疾病(GVHD);其受者体内的CD8+T细胞大量增生;T细胞恢复后产生更多的干扰素-γ(INF-γ)和肿瘤坏死因子-α(TNF-α),T细胞有丝分裂原刀豆素水平处于较高水平,进一步促进T细胞增生。组织学检测提示移植剔除CCR5基因受者细胞的小鼠肾脏出现病理损伤,肝脏存在更为严重的病理变化。结论剔除CCR5基因的异基因骨髓移植使GVHD发病率增加,供者CD8+T细胞在受者体内增生加重肝肾损害。提示CCR5在异基因骨髓移植中起着重要作用。  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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