葡萄球菌肠毒素A的细胞增殖诱导能力

目的：观察葡萄球菌肠毒素Ａ的细胞增殖诱导能力及其抗肿瘤作用。方法：ＭＴＴ微量酶反应比色法。结果：纯化ＳＥＡ在１０＾－１２￣１０＾－１５ｇ／ｍｌ浓度范围对体外培养的ＢＡＬＢ／Ｃ鼠脾细胞表现了细胞增殖诱导能力,并呈剂量依赖关系,其中１０＾－７￣１０＾０５ｇ／ｍｌＳＥＡ的作用强于最适量（２５μｇ／ｍｌ）ＰＨＡ。在Ｅ／Ｔ为５￣２０：１条件下,１０＾－５ｇ／ｍｌＳＥＡ活化４８小时的ＢＡＬＢ／Ｃ鼠脾细胞对Ｙａｃ－１细胞的杀伤活性高于ＮＫ细胞,但ＳＥＡ未能增强ＢＡＬＢ／Ｃ鼠脾细胞对Ｂ１６细胞的杀伤活性。结论：葡萄球菌肠毒素Ａ具有较强的细胞增殖诱导能力,据此超抗原特性可应用于肿瘤的生物治疗。     

丹参有效成份764－3对血小板聚集和花生四烯酸代谢产物的影响

７６４－３是从中药丹参中提取的有效成份，对ＡＡ和ＡＤＰ诱导的家兔和人血小板聚集有明显抑制作用。在以ＡＡ为底物，猪肺微粒体供酶系统中，小剂量７６４－３（５－１００μｇ／ｍｌ）明显促进６－ｋｅｔｏ－ＰＧＦ１α的生成，剂量与效应相关。大剂量７６４－３（５００μｇ／ｍｌ）对ＴＸＢ２和６－ｋｅｔｏ－ＰＧＦ１α的生成都有抑制作用。结果提示：小剂量７６４－３可能有利于ＴＸＢ２和６－ｋｅｔｏ－ＰＧＦ１α平衡的调节。     

丹参有效成份764—3对血小板聚集和花生四烯酸代射产物的影响

７６４－３是从中药丹参中提取的有效成份，对ＡＡ和ＡＤＰ诱导的家兔和人血小板聚集有明显抑制作用，在以ＡＡ为底物，猪肺微粒体供酶系统中，小剂量７６４－３（５－１００μｇ／ｍｌ）明显促进６－ｋｅｔｏ－ＰＧＦ１ａ的生成，剂量与效应相关，大剂量７６４－３（５００μｇ／ｍｌ）对ＴＸＢ２和６ｋｅｔｏ－ＰＧＦ１ａ的生都有抑制作用，结果提示：小剂量７６４－３可能有利于ＴＸＢ２和６ｋｅｔｏ－ＰＧＦ１ａ平衡的调节。     

PDGF-AB对增生性瘢痕成纤维细胞增殖的影响

目的：探讨ＰＤＧＦ－ＡＢ促进伤口愈合的作用机理及其在瘢痕增生中的作用。方法：取体外培养的人正常皮肤及增生性瘢痕成纤维细胞（ＨＴＳＦＢ）测定生长曲线,用ＭＴＴ法观察ＰＤＧＦ－ＡＢ对其增殖影响的差异。结果：两种细胞生长曲线存在差异,ＰＤＧＦ－ＡＢ对两种成纤维细胞增殖均有明显刺激作用,且均呈剂量依赖性关系,但作用有差异。结论：ＰＤＧＦ－ＡＢ可能通过刺激成纤维细胞增殖促进伤口愈合,同时在瘢痕增生性疾病中起     

枸杞多糖对小鼠胸腺细胞凋亡的调节

目的：以ＤＥＸ诱导小鼠胸腺细胞凋亡为模型，研究中药枸杞多糖（ＬｙｃｉｕｍＢａｒｂａｒｕｍＰｏｌｙｄｓｃ－ｃｈａｒｉｄｅ．ＬＢＰ）及氧化苦参碱（ＯＸＹ）对胸腺细胞凋亡的调节作用。方法：应用ＰＩ法检测亚２倍体细胞，二苯胺法测定胸腺细胞ＤＮＡ片断化％及ＤＮＡ凝胶电泳。结果：ＬＢＰ可抑制ＤＥＸ诱导的ＤＮＡ片断化，其抑制作用具有剂量依赖性，以１ｇ／Ｌ最明显；ＬＢＰ（ｌｇ／Ｌ）尚可阻止ＤＥＸ诱导的胸腺细胞内Ｃａ￣（２＋）升高。结论：ＬＢＰ可抑制ＤＥＸ诱导的小鼠胸腺细胞凋亡，ＯＸＹ对此无明显的调节作用。     

IL－1α诱导牛脑微血管内皮细胞释放血小板衍生性生长因子

目的：研究白细胞介素－１α（ＩＬ－１α）诱导牛脑微血管内皮细胞（ＢＣＭＥＣ）释放血小板衍生性生长因子（ＰＤＧＦ），以及药物对由之引起的牛脑微血管平滑肌细胞（ＢＣＭＳＭＣ）增殖的拮抗作用。方法：体外培养ＢＣＭＥＣ和ＢＣＭＳＭＣ，结晶紫染色法测定细胞增殖。结果：ＩＬ－１α不能直接促进ＢＣＭＳＭＣ的增殖；但经ＩＬ－１α刺激的ＢＣＭＥＣ培养上清能显著地促进ＢＣＭＳＭＣ的增殖。这种增殖作用与ＩＬ－１α剂量呈正相关，并且可被抗ＰＤＧＦ抗体中和。欧芹素乙（Ｉｍｐ），异欧芹素乙（ｉｓｏ－Ｉｍｐ），６－（α，α－ｐｈｅｎｙ－ｌａｃｅｔｙｌｐｉｐｅｒａｚｉｎｙｌ）ｐｈｅｎｙｌ－５－ｍｅｔｈｙｌ－４，５－ｄｉｈｙｄｒｏ－３（２Ｈ）－ｐｙｒｉｄａｚｉｎｏｎｅ（ＰＭＤＰ）不影响ＩＬ－１α诱导ＢＣＭＥＣ释放ＰＤＧＦ，但对ＰＤＧＦ促ＢＣＭＳＭＣ增殖呈剂量依赖的拮抗。结论：ＩＬ－１α促进ＢＣＭＥＣ释放ＰＤＧＦ。ＩＬ－１α对ＢＣＭＳＭＣ增殖的促进作用需经ＰＤＧＦ等生长因子的介导。Ｉｍｐ，ｉｓｏ－Ｉｍｐ，ＰＭＤＰ拮抗ＰＤＧＦ引起的ＢＣＭＳＭＣ增殖。     

粉防己碱抑制大鼠肺动脉高压过程中PDGF-A、B表达的研究

目的：探讨血小板源生长因子（ＰＤＧＦ）在粉防己碱（Ｔｅｔ）抑制野百合碱（ＭＣＴ）诱导的大鼠肺动脉高压肺血管构形重建中的作用。方法：建立（ＭＣＴ）诱导的大鼠肺动脉高压模型,同进以两个实验组加不同剂量的Ｔｅｔ抑制肺动脉高压,用免疫组化方法检测Ｔｅｔ对ＭＣＴ致肺动脉高压在 肺小动脉中膜平滑肌细胞ＰＤＧＦ－Ａ、Ｂ表达的影响。结果：Ｔｅｔ能抑制肺小动脉中膜平滑肌细胞增殖时的ＰＤＧＦ－Ｂ的表达增强（Ｐ〈０．０     

绞股蓝总皂甙及与化疗药合用对体外培养慢粒急性变病人癌细胞增殖的影响

目的：观察绞股蓝总皂甙（ＧＰ）及ＧＰ与化疗药合用对体外培养慢性粒细胞性白血病急性变病人癌细胞增殖的影响。方法：用ＭＴＴ比色分析法测定ＧＰ及ＧＰ与阿糖胞苷（Ａｒａ－Ｃ）、高三尖杉酯碱ＨＨＲＴ分别合用对慢粒急变细胞的相对抑制率。结果：ＧＰ（１２．５～５０．０μｇ·ｍｌ－１）对体外培养慢性粒细胞性白血病急性变病人癌细胞具有明显抑制作用（Ｐ＜０．０５～０．０１）。ＧＰ（３．１２５μｇ·ｍｌ－１）同Ａｒａ－Ｃ（５．０μｇ·ｍｌ－１）、ＨＨＲＴ（６．７５μｇ·ｍｌ－１）分别合用相对抑制率（７７．０％，８６％）较单用Ａｒａ－Ｃ（１５．０μｇ·ｍｌ－１）或ＨＨＲＴ（２０．０μｇ·ｍｌ－１）的相对抑制率（４７％、４１％）高（Ｐ＜０．０５）。结论：１．ＧＰ对慢性粒细胞性白血病急性变病人癌细胞生长增殖具有抑制作用，呈剂量相关性。２．ＧＰ能增强阿糖胞苷、高三尖杉酯碱抑制增殖作用。     

Ge－132体外对ConA诱导的小鼠脾细胞表达IL3mRNA的影响

用斑点杂交法分析了Ｇｅ－１３２体外对ＣｏｎＡ诱导的小鼠脾细胞表达ＩＬ３ｍＲＮＡ的影响。结果Ｇｅ－１３２使鼠脾细胞表达ＩＬ３ｍＲＮＡ在２０ｈ左右达高峰，有效剂量范围较大（１０－３μｇ／ｍｌ～１００μｇ／ｍｌ），尤以１０－１μｇ／ｍｌ和１μｇ／ｍｌ两个剂量效果为佳，提示Ｇｅ－１３２促进造血的作用与其提高Ｔ细胞表达ＩＬ３有关。     

几种阿魏酸衍生物高分子药物对血小板聚集和血栓素B_2、6-酮-前列腺素F_(Ⅰα)产生的影响

目的通过测定兔血小板聚集和血栓素Ｂ２（ＴＸＢ２）、６－酮－前列腺素Ｆ_(Ⅰα)（６－ｋｅｔｏ－ＰＧＦ_(Ⅰα)）的含量,比较观察阿魏酸（Ｆ）、吲哚美辛（Ｉ）、阿魏酸－吲哚美辛结合物（ＦＩ）和阿魏酸－吲哚美辛－淀粉高分子载体衍生物（ＦＩＳ）在抗血栓方面的药理作用特点。方法用比浊法和放免法测定Ｆ、Ｉ、ＦＩ和ＦＩＳ在体外对兔血小板聚集和对ＴＸＢ２,６－ｋｅｔｏ－ＰＧＦ_(１α)生成的影响。结果Ｆ、Ｉ、ＦＩ和ＦＩＳ显著地抑制ＡＤＰ和ＡＡ诱导的兔血小板聚集和ＴＸＢ_２,６－ｋｅｔｏ－ＰＧＦ_(Ⅰα)的产生。在 １２．５－２４０μｍｏｌ／Ｌ的剂量范围内,对血小板聚集的抑制率, Ｆ为 １１．３％－３１．８％（ＡＤＰ诱导）和 ３.３％－１８．５％（ＡＡ诱导）、Ｉ为３％－３４．３％（ＡＤＰ诱导）和２％－２０．２％（ＡＡ诱导）、ＦＩ为５．０％－５９．３％（ＡＤＰ诱导）和０．３％－６３．１％（ＡＡ诱导）、ＦＩＳ为３.１％－３９．１％（ＡＤＰ诱导）和１．５％－３９.６％（ＡＡ诱导）。剂量为 ２４０.０μｍｏｌ／Ｌ时对ＴＸＢ_２和６－ｋｅｔｏ－ＰＧＦ_(Ⅰα)产生的抑制率, Ｆ为 １４．８％和 １.２％、Ⅰ为 ２４.９％和 ２６．２％、 ＦＩ为 ４０.６％和２９．３％     

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.