槲皮素-7-硫酸酯钠体外抗氧化作用

目的探讨槲皮素-7-硫酸酯钠（SQMS）的体外抗氧化活性。方法取小鼠肝组织,匀浆,体外孵育,分光光度法检测不同浓度SQMS（0.10、0.25、0.50 mmol/L）对肝组织中丙二醛（MDA）含量、总抗氧化能力（T-AOC）和超氧化物歧化酶（SOD）活力的影响。结果与空白组相比,不同浓度SQMS（0.10、0.25、0.50 mmol/L）均能显著降低肝组织中MDA的含量;中、高浓度SQMS（0.25、0.50 mmol/L）能显著升高肝组织T-AOC;低、中浓度SQMS（0.10、0.25 mmol/L）对肝组织SOD活力有显著升高作用。结论 SQMS具有较强的体外抗脂质过氧化作用及抗氧化能力,其抗氧化可能与提高SOD活力有关。     

槲皮素-3-硫酸酯钠的合成、表征及抗肿瘤活性研究

目的:研究槲皮素-3-硫酸酯钠的合成、表征及抗肿瘤活性,并对槲皮素和槲皮素-3-硫酸酯钠的溶解度及其抗肿瘤作用进行对照比较。方法:以芦丁为原料,合成出槲皮素-3-硫酸酯钠,通过元素分析、红外光谱、紫外光谱及核磁共振等,确定其组成结构以及测定其溶解度。同时采用噻唑蓝(MTT)比色法测定槲皮素及磺化产物对HepG2肝癌细胞株的抗肿瘤活性。结果:槲皮素-3-硫酸酯钠在水中溶解度(15℃)是3.391 mg/mL,比槲皮素增大42.6倍。由于水溶性的增强,槲皮素-3-硫酸酯钠高浓度下对HepG2细胞抑制率显著高于槲皮素。结论:槲皮素-3-硫酸酯钠的水溶性提高,抗肿瘤作用明显。     

Study on Synthesis, Characterization and Anti-tumor Activity of Quercetin-3-sulphate Sodium

目的:研究槲皮素-3-硫酸酯钠的合成、表征及抗肿瘤活性,并对槲皮素和槲皮素-3-硫酸酯钠的溶解度及其抗肿瘤作用进行对照比较.方法:以芦丁为原料,合成出槲皮素-3-硫酸酯钠,通过元素分析、红外光谱、紫外光谱及核磁共振等,确定其组成结构以及测定其溶解度.同时采用噻唑蓝(MTT)比色法测定槲皮素及磺化产物对HepG2肝癌细胞株的抗肿瘤活性.结果:槲皮素-3-硫酸酯钠在水中溶解度(15℃)是3.391 mg/mL,比槲皮素增大42.6倍.由于水溶性的增强,槲皮素-3-硫酸酯钠高浓度下对HepG2细胞抑制率显著高于槲皮索.结论:槲皮素-3-硫酸酯钠的水溶性提高,抗肿瘤作用明显.     

MNNG诱导小鼠胸腺细胞DNA损伤修复模型的建立

目的本实验研究了诱导小鼠胸腺细胞DNA损伤的适宜MNNG浓度以及损伤后DNA修复的时间范围。方法用终浓度为5、10、50、100、500、1 000μmol/L的亚硝基胍(N-methyl-N-’nitro-N-nitrosoguanidine,MNNG)分别处理小鼠胸腺细胞0.5 h,然后用RPMI-1640培养基培养,分别于0 h0、.5 h2、h、4 h8、h检测细胞存活情况和细胞DNA损伤修复情况。结果随着MNNG浓度的增大,细胞死亡率、DNA拖尾率以及彗星尾长都显著升高,其中100、5001、000μmol/L MNNG处理细胞后,细胞数量少,拖尾非常严重,无法测量。不同MNNG浓度之间的DNA损伤和修复程度差异显著(P<0.01),呈现明显的剂量反应关系。DNA拖尾率在0.5 h或2 h达到高峰,彗星尾长在2 h最大,在2~8 h内,拖尾率和彗星尾长都显著降低(P<0.01),接近对照。结论采用5μmol/L或10μmol/LMNNG处理小鼠胸腺细胞0.5 h可以诱导细胞DNA损伤,损伤后的DNA可以在2~8 h内基本修复。     

褐藻多糖硫酸酯减轻1-甲基-4-苯基吡啶离子引起的细胞损伤和氧化应激

目的以1-甲基-4-苯基吡啶离子(1-methyl-4-phenylpyridinium,MPP+)为工具药处理MN9D细胞,建立帕金森病(Pakinson’s disease,PD)的细胞模型,观察褐藻多糖硫酸酯对细胞的保护作用,并初步探讨其作用机制。方法用不同浓度(25、50、100、200μmol/L)的MPP+处理MN9D细胞36h,50μmol/L MPP+处理MN9D细胞,时间分别为12、2436、48h,建立细胞损伤模型。用0.01、0.1、1g/L褐藻多糖硫酸酯预孵育MN9D细胞1h后,加入50μmol/L MPP+共同作用36h以探讨褐藻多糖硫酸酯的保护作用。MTT法检测细胞活力、生化法测定乳酸脱氢酶(LDH)释放量,并采用二氯荧光素乙二酯(DCF-DA)染色法检测细胞内的氧化应激水平。结果随着MPP+浓度增加或作用时间延长,MN9D细胞MTT值逐渐降低。50μmol/L MPP+处理细胞36h,MTT值明显下降,LDH释放量增加。而0.1、1g/L的褐藻多糖硫酸酯预孵育1h,可明显减轻MN9D细胞的损伤,提高MTT值并降低LDH释放量,细胞形态学改变与生化实验结果一致。50μmol/L MPP+作用12h,可使MN9D细胞的氧化应激水平明显升高,而0.1、1g/L的褐藻多糖硫酸酯预处理1h,可以拮抗MPP+引起的细胞内氧化应激水平增高。结论褐藻多糖硫酸酯可以有效拮抗MPP+对MN9D细胞的损伤作用,其机制可能与褐藻多糖硫酸酯具有抗氧化活性有关。     

外源核苷酸对受损小鼠胸腺细胞DNA修复的影响

目的:探讨外源核苷酸对受损小鼠胸腺细胞DNA修复的影响.方法:采用10 μmol/L的N-甲基-N-硝基-N亚硝基胍(MNNG)诱导小鼠胸腺细胞DNA损伤后,在终浓度分别为0,0.1,1和10 mmol/L核苷酸的RPMI-1640基础培养基或完全培养基中培养,在培养的第2,5 h采用单细胞凝胶电泳技术分析细胞DNA损伤和修复情况.结果:培养2 h时,基础培养基中各组间的拖尾细胞百分率差异无统计学意义(P＞0.05);完全培养基中核苷酸能降低拖尾率(P＜0.01).5 h时,随着核苷酸添加浓度的升高,拖尾率均降低(P＜0.01).在相同的培养基中,各组的彗星尾长在2 h差异无统计学意义(P＞0.05),5 h后,在基础培养基中添加1,10 mmol/L的核苷酸使得彗星尾长降低(P＜0.05);在完全培养基中添加1,10 mmol/L的核苷酸也使得彗星尾长降低(P＜0.01).在培养的2～5 h内,补充核苷酸均能提高基础培养基(P＜0.05)和完全培养基(P＜0.01)中DNA修复细胞的百分率.结论:外源核苷酸能明显促进受损小鼠胸腺细胞DNA的修复,且核苷酸的作用与其添加水平有关.     

蚂蚁提取液对DNA-蛋白质交联修复能力的研究

目的 探讨蚂蚁提取液(ant extract,AE)对DNA -蛋白质交联(DPC)的修复能力.方法 以甲醛为染毒液,预处理小牛胸腺DNA和卵清蛋白混合液,使之形成DPC,再用不同浓度的AE处理,最后采用SDS - KCI沉淀法来检测不同处理组的DPC修复情况.结果 当甲醛染毒浓度为0.544mol/L时,10μg/ml的小牛胸腺DNA和10μg/ml的卵清蛋白DNA -蛋白质交联程度最高;制备2％的AE时,选择pH 7.6的磷酸氢二钠-磷酸二氢钠缓冲液作为组织匀浆液,AE具有最强的DPC修复能力,且用pH 3.6的柠檬酸-柠檬酸三钠缓冲液制备的AE也具有部分DPC修复能力;0.002％、0.02％、0.2％和2％的AE具有一定的DPC修复能力,且存在明显的浓度-效应关系.结论 本研究确定了蚂蚁提取液制备过程中缓冲液的最佳pH值,并证明了蚂蚁提取液具有一定的DPC修复能力.     

脾肾双补法对衰老小鼠胸腺细胞DNA氧化损伤修复的影响

目的观察脾肾双补法对衰老小鼠胸腺细胞DNA氧化损伤修复的影响。方法小鼠随机分为6组,每组10只。分别为正常组、模型组、维生素E组、脾肾双补方治疗高剂量组、脾肾双补方中剂量组,脾肾双补方低剂量组,采用单细胞凝胶电泳法检测胸腺细胞DNA氧化损伤修复的情况。结果实验表明:正常组胸腺细胞虽有很短尾长,但并未表现为彗星样拖尾,提示正常组胸腺细胞DNA氧化损伤较少。中、高剂量组和西药对照组的胸腺细胞尾长与模型组比较均有显著性差异,且中药高剂量组作用强于维生素E组。结论脾肾双补法可以减少衰老模型小鼠胸腺细胞彗星拖尾长度,对DNA氧化损伤具有一定的拮抗或修复作用,并存在一定的量效关系,说明脾肾双补法延缓模型小鼠衰老的作用可能与其对DNA氧化损伤的拮抗或修复作用有关。     

单细胞凝胶电泳法检测双酚A对小鼠睾丸细胞DNA损伤

目的 采用单细胞凝胶电泳法研究双酚A对小鼠睾丸细胞DNA的影响.方法 制备小鼠生殖细胞悬液,用不同浓度的双酚A染毒1 h后,应用单细胞凝胶电泳法检测睾丸细胞DNA损伤情况.结果 与对照组比较,除10-10 mol/L组外,其他各染毒组拖尾率均明显高于对照组(P＜0.05).随着双酚A染毒浓度的增加,小鼠睾丸细胞DNA损伤程度也逐渐增加(P＜0.05),在10-5 mol/L和10-6 mol/L组均出现了Ⅳ级损伤.结论 双酚A体外染毒可造成小鼠睾丸细胞DNA损伤,且随着剂量的增加有加重的趋势.     

硒对氟致小鼠成釉细胞DNA损伤的作用研究

目的:探讨硒对氟致小鼠成釉细胞DNA损伤的拮抗作用。方法:小鼠成釉细胞未经氟化钠处理为对照组;以氟化钠浓度分别为0.25,0.50,1.00,2.00,4.00mmol/L处理作为单独染氟组;以2.50,5.00,10.00μmol/L Na2SeO3为单独染硒组;以2.50,5.00,10.00μmol/L Na2SeO3+0.25,0.50,1.00,2.00,4.00mmol/L氟化钠为联合作用组。细胞作用24h后,采用单细胞凝胶电泳技术(SCGE)检测DNA单链断裂情况。结果:与对照组相比,单独染硒组小鼠成釉细胞的尾长、Olive尾矩、尾DNA%、尾长/头长值显著性升高(P<0.05),而单独染硒组以上指标均明显下降(P<0.05)。2.50,5.00,10.00μmol/L Na2SeO3+氟化钠联合作用小鼠成釉细胞的尾长、Olive尾矩、尾DNA%、尾长/头长值明显低于对照组和相同剂量单独染氟组(P<0.05),且高于相应剂量的单独染硒组(P<0.05)。与2.50μmol/L Na2SeO3+氟化钠联合染毒组比较,5.00,10.00μmol/L Na2SeO3+各剂量氟化钠联合作用组Olive尾矩均升高(P<0.05)。结论:过量摄入氟化物可导致小鼠成釉细胞DNA损伤,而适量的硒对氟致DNA损伤有一定的拮抗作用,且实验浓度为2.50μmol/L时其拮抗效果较好。     

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.