刀豆素A诱导小鼠抑制性细胞的体外研究

我们研究了刀豆素A(ConA)在体外诱导小鼠脾脏抑制性细胞所需的最适当剂量,发现约0.78μg/ml或50pμg/ml的浓度对大多数小鼠能诱导出以抑制性功能为主的细胞,这些细胞能抑制正常淋巴细胞(应答细胞)对促有丝分裂原的增生反应。6.25～12.50μg/ml的ConA所诱导的脾细胞能增强应答细胞对促有丝分裂原的增生反应。未经ConA诱导的脾细胞(对照细胞)可抑制或增强应答细胞对促有丝分裂原的增生反应。通常检测抑制性功能是应用相对抑制率来表示,但是它不能真实地反映ConA诱导细胞的功能。我们建议增加绝对抑制率的指标,因它能反映ConA诱导细胞的真实功能。这两种表示方法可以相互补充。     

正常人外周血单个核细胞白细胞介素-2受体荧光定量方法研究(简报)

本文探索了应用荧光分光光度计定量测定正常人外周血单个核细胞白细胞介素-2受体(IL_2R)的方法及其条件。以PHA与ConA诱导单个核细胞IL_2R表达的最适细胞浓度为3×10~6/ml。PHA和ConA最适浓度分别为100μg/ml和10μg/ml,PHA诱导较ConA为优。PHA诱导细胞IL_2R表达24小时达到高峰,尔后逐渐下降。第一抗体(抗—Tac)与第二抗体(荧光抗体)的最适浓度分别为1:50和1:32,两种抗体与单个核细胞孵育时间分别以20和10分钟为好。检测了同一标本不同复管的细胞(1×10~6)IL_2R结合荧光抗体M为(5.22±0.45)×10~(-10),变异     

小牛胸腺细胞抑裂素对人类体外免疫反应的抑制效应

小牛胸腺细胞抑裂素对致分裂原(PHA或ConA)、可溶性抗原(破伤风类毒素),同种淋巴细胞体外刺激的人类淋巴细胞反应具有明显的抑制效应,而小牛血清则无此效应。其抑制百分比在浓度为100μg/0.5ml培养液时达90％以上。抑裂素剂量与抑制效应有关,浓度在25μg/0.5ml以下时不明显,剂量增高则加强。     

PHA诱导猪淋巴结细胞与脾细胞IL-2的产生

作者用人乙型肝炎疫苗免疫的猪淋巴结细胞与脾细胞在植物血凝素(PHA)的诱导下,观察白细胞介素Ⅱ(IL-2)的产生情况.实验采用50μg/ml,100μg/ml,200μg/ml的PHA剂量,24,40,48或72 h的培养时间.结果表明,淋巴结细胞PHA用量以200μg/ml,脾脏细胞以100μg/ml为佳,培养时间均以40 h为宜.同样条件下,淋巴结细胞较脾细胞产量高,与人外周血白细胞IL-2的产生相比较,产量相近。而其作用有待进一步研究.     

增加精氨酸摄入量对灼伤病人淋巴细胞功能的影响

本实验观察了增加精氨酸摄入量对灼伤病人外周血淋巴细胞转化功能、血浆氨基酸谱及T淋巴细胞亚群的影响。结果表明,灼伤病人增加精氨酸摄入量后,其外周血淋巴细胞对植物血凝素(PHA)刺激的反应性,CD_4~+阳性细胞的比例,CD_4~+/CD_8~+细胞的比例均较对照组有明显提高。提示增加精氨酸摄入量具有改善灼伤后机体免疫功能的作用,为临床治疗提供了实验依据。     

正常人淋巴细胞化学发光(Ly—CL)测定的研究

ConA 和 PHA 均能激发 Ly—CL。在同等剂量下,ConA 引起的 Ly—CL 峰值较 PHA 高,峰时较 PHA 短。PHA 激发 Ly—CL 的最佳条件是:PHA200μg/ml,淋巴细胞1×10~6个/ml,Luminol 浓度1×10~(-4)mol/L。随着淋巴细胞在4℃存放时间的延长,LY—CY 峰值下降,峰时延长,均和存放时间呈线性关系(P<0.0005)。     

肉苁蓉多糖的纯化及其对T细胞功能调节的研究

研究肉苁蓉主要成分之—─—多糖对小鼠胸腺T细胞的功能调节。方法：采用沉淀法获肉苁蓉粗多糖，以DEAE－SephadexA－50和SephacrylS－200柱层析，获得肉苁蓉多糖（CDPS）。再采用噻唑蓝比色法（MTT）观察CDPS对小鼠脾、胸腺淋巴细胞增殖反应的影响及对正常小鼠脾淋巴细胞分泌IL－2的影响。结果：CDPS纯化后经SephacrylS－200鉴定为单一对称峰。CDPS体外实验，在12．5～200μg／ml浓度范围内，有单独和协同ConA、PHA促进小鼠胸腺淋巴细胞增殖的作用（P＜0．01）。CDPS在100μg／ml浓度时，能显著提高小鼠脾淋巴细胞分泌IL－2的能力．其IL－2活性明显高于对照组（P＜0．01）。结论：肉苁蓉多糖能增加小鼠脾、胸腺淋巴细胞的增殖反应，且与ConA、PHA有协同刺激小鼠胸腺淋巴细胞增殖的作用；并能显著提高小鼠脾脏T淋巴细胞分泌IL－2。     

甘草甜素对人脾细胞产生γ-干扰素的影响(摘要)

本文报告了甘草甜素对人脾细胞产生γ-干扰素影响的研究。结论:人脾细胞在ConA、PHA的诱导下可以产生γ型干扰素;甘草甜素可以增加ConA诱导人脾细胞产生的γ-IFN对PHA无此作用;甘草甜素和ConA联合诱生γ-IFN的最适条件是:甘草甜素和ConA 200μg/ml,诱生时间48小时。细胞浓度为5×10~6至1×10~7为宜。     

盐酸13-己基小檗碱对T淋巴细胞活化和角质形成细胞细胞因子产生的影响

目的研究盐酸13-己基小檗碱对T淋巴细胞活化、角质形成细胞增殖、以及白介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)和白介素-1(IL-1)产生的影响,探索该化合物针对炎症性皮肤病的作用靶点。方法体外培养小鼠脾脏T淋巴细胞、永生化角质形成细胞株HaCaT细胞以及小鼠腹腔巨噬细胞,分别用伴刀豆球蛋白A(ConA)、重组人肿瘤坏死因子-α(rhTNF-α)、312nm窄波UVB和脂多糖(LPS)诱导,采用MTT法检测盐酸13-己基小檗碱对小鼠T淋巴细胞活化和HaCaT细胞增殖的影响,用ELISA法检测其对HaCaT细胞IL-8和TNF-α,以及小鼠腹腔巨噬细胞IL-1β产生的影响。结果盐酸13-己基小檗碱明显抑制小鼠T淋巴细胞活化(IC50≈0.123μg/ml);在0.05～0.78μg/ml范围对HaCaT细胞增殖无明显的直接影响(抑制率<15%),能剂量依赖性抑制25ng/ml rhTNF-α诱导的HaCaT细胞IL-8产生(IC50=0.13μg/ml)和124.2 mJ/cm2窄波UVB照射引起的HaCaT细胞TNF-α产生(IC50=0.21μg/ml);在0.01μg/ml浓度时抑制10μg/ml LPS诱导的小鼠腹腔巨噬细胞IL-1β产生(抑制率达50%)。结论盐酸13-己基小檗碱能抑制T淋巴细胞活化及炎症性细胞因子IL-8、TNF-α和IL-1β产生,提示以上作用可能是该化合物针对炎症性皮肤病的作用靶点。     

T调节细胞对EB病毒感染B细胞的影响

本文应用细胞培养、免疫酶标和放射免疫测定方法,探讨了鼻咽癌(NPC)病人、EB病毒壳抗原IeA(IgA/VCA)血清学阳性和阴性健康成人的外周血单个核细胞(PBMC),经PHA和ConA诱导产生的调节细胞对EB病毒(EBV)感染B细胞的影响。结果表明:PHA诱导细胞对EBV感染PBMC的EBV核抗原(EBNA)阳性细胞和~3H-TdR掺入量均有抑制作用,而ConA诱导细胞的作用则相反,具有促进作用。上述影响作用可分别被T_4或T_8单克隆抗体(McAb)所阻断,提示诱导细胞对EBV感染PBMC的促进或抑制作用主要与T_4或T_8细胞有关。     

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.