615系成年小鼠脾脏自然杀伤细胞活性的观察

我国自己培育的615近交系小鼠,已广泛地用于免疫学及实验肿瘤学的研究。迄今未见有关615系小鼠自然杀伤细胞(Natural Killer,NK)活性的报道。本文报道正常615系成年小鼠脾细胞对~(125)I-udR标记的肿瘤靶细胞的体外NK效应。材料与方法一、动物:615系小鼠,自中国医学科学院实验动物中心引入,在本室繁殖饲养,鼠龄2～2 1/2月,雌雄均有。二、脾细胞(效应细胞)制备:按常规方法制备     

非近交系615/PBI-beige/nude小鼠免疫学功能的初步研究

非近交系615/PBI-beige/nude小鼠(以下简称615-bg/nu)是一种T和NK细胞功能联合缺陷型动物,其主要遗传背景来源于国内培育的近交系小鼠615/GI。它是以615/PBI-nu和615.B6—bg为亲本动物,采用杂交-内交和回交-内交等5个不同交配步骤培育而成。初步研究表明,该615-bg/nu小鼠脾细胞对ConA诱导的增殖反应,与非beige裸鼠相近,而其自然杀伤(NK)细胞活性(9.2±2.4％)明显低于615-nu裸小鼠(39±4.8％)和BALB/C-un裸小鼠(32±4.6％)(P<0.01)。此外,我们发现在beige和非beige小鼠,其脾细胞的NK活性都有随其nu基因数目增加而升高的趋势,这表明杂合状态下的nu基因亦可使小鼠的NK活性增高。这种低NK活性的T细胞缺陷动物模型——615-bg/nu的育成,为肿瘤免疫学和实验肿瘤学的研究工作提供了一种极有价值的新实验材料。     

转输小鼠脾细胞对小鼠白血病(L615)的防治作用

本文报告了转输正常小鼠脾细胞对615系小鼠白血病(L615)攻击的保护效应。如果在攻击前7天转输,五种具有不同遗传学背景的正常小鼠脾细胞都有明显的保护效应;但若在攻击前28天转输,其保护效应则因供者品系而异;随着E/T(效应细胞数/肿瘤细胞数)比值降低其保护效应也有降低的趋势。如果将相同数量的正常小鼠脾细胞装入扩散盒,然后将其植入小鼠腹腔,则不能诱导保护效应。转输正常肾细胞或注射正常脾细胞匀浆对L615白血病细胞攻击也无任何保护效应。实验组大多数存活小鼠都能耐受剂量递增(10~4—10~6)的L615白血病细胞的反复攻击。在继承性化学免疫治疗实验中这些存活小鼠的免疫脾细胞能延长晚期L615病鼠的中位存活时间,甚至能使50%(5/10)的小鼠获得治愈。     

615系小鼠的自发性肿瘤观察

615系小鼠是中国医学科学院输血及血液学研究所将昆明种(雌)杂种小鼠与C_(57)BL(雄)近交系小鼠杂交后,进一步培育而成的一株灰褐色近交系小鼠,已广泛应用于肿瘤学的实验研究中。但是关于615系小鼠自发瘤的发生率,迄今未见有公开报道。为了获得有关615系小鼠的某些生理学或和病理     

GITR抗体对L615白血病抑制作用的实验研究

目的 探讨糖皮质激素诱发型TNF受体(glucocorticoid-induced tumor necrosis factor receptor,GITR)的抗体对抗小鼠L615白血病(T淋巴细胞来源白血病)的效果和作用机制.方法 以L615小鼠建立白血病模型,分3组实验组以及阴性对照组,观察实验小鼠生存状态及时间、外周血白细胞计数及分类、外周血和骨髓中白血病细胞形态变化、肝脾指数、肝脾组织病理改变.结果 GITR抗体可以延长L615白血病小鼠的生存时间,可引起骨髓中白血病细胞发生凋亡、坏死、肝脾指数降低、肝脾组织被白血病细胞浸润,提示GITR抗体能够降低和缓解白血病细胞所致的小鼠外周血白细胞的升高和浸润,以及肝脾的肿大.结论 通过免疫调节机制GITR抗体能够有效地抑制L615白血病细胞的增殖,进而抑制白血病的发展.     

近交系小鼠遗传质量监测新方法的建立——染色体Q—H分带技术及其应用

本研究利用最新的Quinacrine Mustard and 33258 Hoechst(Q—H)复合荧光染色技术对10个品系的近交系小鼠的核型进行分析。在同一细胞内,按各号染色体着丝粒带大小排列、分组,建立该10个品系近交系小鼠特有的染色体着丝粒带核型,作为各品系小鼠遗传质量监测的染色体标记指标。本研究还对615小鼠品系的生化标汜检测与染色体标记检测的结果进行比较,同时比较了不同来源615小鼠的染色体标记,从而进一步阐明了该方法作为实验动物遗传监测方法之一与其他方法间的互补性及其自身特点。     

电泳分析白血病小鼠血清及脾细胞匀浆蛋白质

本文应用不连续性聚丙烯酰胺凝胶电泳法测定L615和我实验室制备的抗白血病生物活性物质治疗后的L615小鼠血清及脾细胞匀浆蛋白质组份。结果是L615纯系小鼠血清蛋白质谱中,含有13—16条分带,脾细胞匀浆蛋白质中α球蛋白含量最多。L615白血病小鼠血清,脾细胞匀浆蛋白质的α_1球蛋白呈现1条异常分带,而615小鼠和80—11小鼠则缺如。     

SDS—聚丙烯酰胺凝胶电泳法测定白血病小鼠(L615)脾细胞匀浆蛋白质分子量

本文应用SDS—不连续性聚丙烯酰胺凝胶电泳法测定了L615可移植性淋巴细胞型白血病小鼠脾细胞匀浆的蛋白质分子量。确定其组份为11条电泳区带。分子量为12,590～89,130并在半对数座标图上呈直线。正常纯系615小鼠脾细胞匀浆蛋白质分子量为11,220～72,440。抗白血病实验小鼠蛋白质与615小鼠相同,     

Ca759乳腺癌带瘤小鼠脾脏的抑制细胞

本文报道615系小鼠于接种Ca759乳腺癌后,其脾脏细胞能非特异性地抑制正常615系小鼠脾脏淋巴细胞对ConA刺激的增生反应。采用玻皿粘附及尼龙毛柱等细胞分离技术分析抑制细胞的属性,发现用抗Thy—1血清加补体处理带瘤小鼠的脾脏胞,不能去除其对ConA反应系统的抑制作用,而带瘤及正常小鼠脾脏巨噬细胞均具有一定的抑制活性,但前者较后者的抑制活性更强(抑制率分别为100%和71%)。将去除了巨噬细胞的带瘤小鼠脾细胞进一步经尼龙毛分离,发现尼龙毛粘附细胞及非粘附细胞均产生一定的抑制作用。实验结果提示,Ca759带瘤小鼠脾脏存在着不同组分的抑制细胞系统,包括抑制性细胞及抑制性巨噬细胞,它们均可能对带瘤宿主发挥免疫抑制作用。     

用酸性萘乙酸酯酶(ANAE)染色法检测615系小鼠外周血及淋巴样器官中T和B淋巴细胞

一般认为,酸性萘乙酸醋酸(ANAE)染色法是鉴定T淋巴细胞的一种较简便的方法,淋巴细胞的ANAE活性是否呈阳性可以作区分T、B细胞的标志。鉴于615近交系小鼠已较广泛地用于生物医学特别是实验肿瘤学的研究,因此,我们采用ANAE染色法(涂片及冰冻切片)检测了615系小鼠外周血及淋巴样器官中的T和B淋巴细胞,为开展肿瘤免疫学及免疫药理学实验研究提供了615小鼠T、B细胞的正常值和正常分布情况。现将结果报告如下。     

Value of D-Dimers in patients with acute aortic dissection

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.     

Research of combined liver-kidney transplantation model in rats

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.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

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.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

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.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

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.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

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.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

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.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

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.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

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.