LAK细胞免疫活性研究

本文用~(51)Cr-铬酸钠释放法分析了由PBL、SPC和THC制备的LAK细胞免疫活性变化规律。证明LAK细胞的NK活性和LAK活性与IL-2有非常明显的正向依赖关系,与培养细胞密度有明显的负向依赖关系。无IL-2诱导,不表现LAK活性,在低细胞密度条件下少量的IL-2即可激活LAK细胞,细胞密度增大,IL-2剂量需要相应增加,用2×10~6/ml细胞密度制备LAK细胞,诱导LAK细胞活性的最佳IL-2剂量为1000 IU/ml。单用IL-2激活LAK细胞,NK活性高峰时相在48h左右;LAK活性高峰时相在60h前后。LAK细胞杀伤活性可以在培养液中维持1～2天时间,要在较长时间内维持LAK细胞活性,须定期更换培养基,添加IL-2。LAK细胞杀伤活性与细胞形态学变化不完全同步。     

A—LAK细胞的诱导、扩增及抗黑色素瘤作用

目的 探讨A—LAK细胞在rIL-2作用下增殖及其抗肿瘤活性。方法 用MTT法测定A-LAK细胞体外诱导、扩增及抗肿瘤作用。结果 A—LAK细胞的体外增殖活性及抗肿瘤活性均比LAK强，并具有NK细胞特异性表面标记，提示A—LAK细胞可能来源于LGL-NK细胞亚群。结论 A—LAK细胞无论在扩增能力还是细胞毒作用方面均明显高于LAK细胞，可以有效抑制肿瘤生长和转移。     

粘附LAK细胞（A—LAK）体内外抗肿瘤活性的研究

本文研究了A－LAK细胞的体内外抗肿瘤作用，并与LAK细胞进行了比较。18hLDH－L释放实验结果表明，A－LAK细胞与LAK细胞一样对NK敏感的K562和对NK非敏感的Anip973细胞均有抗肿瘤作用。但A－LAK对杀伤靶细胞的能力明显高于LAK细胞，两者相比差异非常显著（P＜0．01）。体内实验表明，A－LAK对高转移入肺腺癌在裸小鼠体内的肺转移抑制率达82.7％，而LAK的肺转移抑制率46％，两者相比（P＜0．01）有显著差异。A－LAK和LAK细胞对人结肠癌裸鼠皮下移植瘤也有显著的抑癌作用，并有明显的延长动物生存期的作用，而A－LAK细胞的抑癌作用较LAK细胞强。     

LAK细胞的抗白血病效应及其影响因素的研究

本实验研究了LAK细胞/IL—2过继输入对L_(615)白血病的治疗作用并用细胞毒试验研究了影响LAK细胞/IL—2临床治疗急性白血病的若干因素。实验结果表明,LAK细胞对急性白血病有治疗作用;急性白血病病人外周血单个核细胞诱生的LAK细胞活性极低,其血清对LAK细胞活性有抑制作用;用同种异体的正常人外周血单个核细胞或胎儿脾脏单个核细胞、胸腺细胞诱生的LAK细胞对急性白血病细胞有较强的杀伤活性,是临床治疗急性白血病的可靠的LAK细胞来源。     

TNFα对LAK细胞抗胃癌效应的影响

目的： 观察体外TNFα联用IL-2培养LAK细胞的抗胃癌作用及TNFα预处理后胃癌细胞对LAK细胞敏感性的变化。方法: 以不同浓度TNFα与IL-2配伍培养LAK细胞, 并做TNFα的单抗阻断试验, 用LDH释放法检测LAK细胞抗癌活性;以TNFα预处理胃癌细胞, 检测LAK细胞抗瘤活性。结果: TNFα在低浓度IL-2下增加LAK活性,使IL-2诱导同等LAK活性的浓度下降约10倍;TNFα预处理使LAK对其抗瘤活性提高约9％。结论: TNFα可增加IL-2诱导的LAK抗胃癌活性;TNFα预处理可使胃癌细胞对LAK的敏感性增加。     

胰岛素对LAK细胞活性的影响

在临床对癌症患者的过继免疫治疗中,LAK细胞加白细胞介素2疗法已被证实有其独特的疗效。但有关LAK细胞的基础研究相对落后,有关LAK细胞调节因素的研究对深入研究LAK细胞现象,阐明LAK细胞本质,对临床过继免疫疗法的进一步开展与完善均具有重要意义。本研究着重观察胰岛素对     

同种LAK细胞对受者免疫系统功能的影响

回输自家LAK细胞过继免疫疗法本身的严重局限和巨大风险的焦点在于LAK细胞的来源问题。本文探讨了同种LAK细胞代替自家LAK细胞用于抗肿瘤过继免疫疗法的安全性,即能否造成GVH病或GVHID。取初生SHR大鼠,腹腔接种相当于成年大鼠治疗剂量的同种TB大鼠LAK细胞。分别于4周和12周后取脾测试免疫功能,参照病态模型组和正常对照组做出评价。同种LAK细胞受者未出现罹患急性     

四种不同组织来源LAK细胞的体外扩增及抗肿瘤作用的比较

目的：比较四种不同组织来源LAK细胞的体外扩增及抗肿瘤作用。方法：选用脐带血制备LAK细胞，并与临床常用的外周血、胎脾及胸腺LAK细胞在体外扩增及抗肿瘤作用方面比较。结果：脐带血的扩增能力显著高于其余3种LAK细胞（P＜0．01），每份脐带血LAK细胞总数可增殖至2．5×1010；抗肿瘤活性以脐带血LAK对SMMC-7221肝癌细胞出现最早（第3d）、活性最强（85％±3％），明显强于其余三者（P＜o．01）；对K562的杀伤作用仍属脐带血LAK最强；而胸腺LAK的活性最弱。结论：脐带血LAK细胞体外增殖快，杀伤活性强，可用于肿瘤的过继性免疫治疗。     

GM-CSF对体外培养的LAK细胞抗肿瘤作用影响的初步研究

目的　探讨GM CSF对LAK细胞抗肿瘤作用影响 ,为临床应用GM CSF提供一些实验数据。方法　按常规分离正常人外周血成单个核细胞 ,分GM CSF组和LAK细胞组进行实验 ,观察GM CSF对LAK细胞的增殖活性和LAK细胞的细胞毒活性的影响。结果　GM CSF组细胞增殖活性较LAK组细胞增殖活性高 ,增殖第 7天时 ,GM CSF组达 7 3× 1 0 6/ml细胞 ,而LAK组只有 5 9× 1 0 6/ml细胞。GM CSF组效应细胞对肝癌细胞杀伤活性为 (1 7 4 8± 1 0 6 5 ) % ,LAK组效应细胞对肝癌细胞杀伤活性为 (32 36± 7 2 9) % ;说明GM CSF组对肝癌细胞的杀伤活性较LAK组效应细胞的杀伤活性为低 (P <0 0 0 5 )。结论　GM CSF对LAK细胞抗肿瘤功能具有抑制作用     

妇科肿瘤患者CD_3AK细胞和LAK细胞杀瘤活性比较

为比较CD3AK细胞和LAK细胞的杀瘤特性，观察了妇科肿瘤患者CD3AK细胞和LAK细胞对卵巢癌细胞系（3AO）的杀伤活性。结果表明：良性肿瘤组LAK细胞杀瘤活性高峰在培养第1、2周，显著高于同期培养的CD3AK细胞（P＜0．05，P＜0．01），第3周则较低，而CD3AK细胞的杀瘤活性高峰在培养第3、4周，显著高于LAK细胞（P＜0．05）；恶性肿瘤组，LAK细胞杀瘤高峰在培养第1周，显著高于同期培养的CD3AK细胞（P＜0．05），而CD3AK细胞杀瘤高峰在培养第2、3周，显著高于同期培养的LAK细胞（P＜0．05）。提示：妇科恶性肿瘤组LAK细胞和CD3AK细胞杀瘤活性高峰均较妇科良性肿瘤早1周左右；CD3AK细胞杀瘤活性高峰较LAK细胞延迟1～2周。说明CD3AK和LAK细胞的杀瘤活性在不同培养阶段表现不同，LAK细胞宜短期培养，CD3AK细胞宜长期培养。     

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.     

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.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

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.