辅酶Q10对UVB损伤人角质形成细胞的保护作用

目的　探讨辅酶Q10对中波紫外线(UVB)照射下人角质形成细胞氧化损伤的保护作用。方法　原代培养人角质形成细胞,建立UVB辐照人角质形成细胞氧化损伤模型,MTT法测定细胞活性;流式细胞仪测定细胞增殖指数;酶法测定脂质过氧化产物丙二醛(MDA)的水平及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH -Px)等抗氧化物酶活性。结果　应用辅酶Q10后,受损细胞的活性及增殖指数均显著增高,细胞上清液中SOD ,GSH -Px的活性增高,丙二醛(MDA)含量降低,且呈量效正比关系。结论　辅酶Q10有对抗UVB氧化损伤,提高受损细胞的活性及增殖指数作用。其保护机制可能是通过清除氧自由基,提高抗氧化物酶活性来发挥的。     

葛根素对中波紫外线损伤HaCaT细胞的抗氧化作用

目的研究葛根素不同处理方式对其抗氧化能力的影响。方法以30mJ/cm2中波紫外线(UVB)和1.0mg/mL葛根素处理HaCaT细胞。实验分为阴性对照组、模型组、UVB照射前给药组、UVB照射后给药组和UVB照射前后给药组。UVB照射后24h收集细胞,检测细胞内活性氧(ROS)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GPH-Px)、过氧化氢酶(CAT)、总抗氧化能力(T-AOC)和丙二醛(MDA)。结果 UVB照射前给药处理和UVB照射前后给药处理,使细胞内T-AOC、CAT、GSH-Px升高,而ROS和MDA降低(P<0.05);UVB照射后给药处理可以升高SOD(P<0.05),但对其他指标无影响(P>0.05)。结论葛根素不同处理方式影响其抗氧化能力,其中预防性结合治疗性处理效果最佳,单纯预防性处理其次,单纯治疗性处理最差。     

泥鳅多糖对UVB诱导HaCaT细胞光损伤的保护作用

目的:探讨泥鳅多糖对UVB诱导的人角质形成细胞(HaCaT)光损伤的保护作用。方法:用不同剂量(10 mJ·cm~(-2)、20 mJ·cm~(-2)、30 mJ·cm~(-2)、40 mJ·cm~(-2)、50 mJ·cm~(-2)、60 mJ·cm~(-2))的UVB照射细胞,选择合适的UVB照射剂量建立HaCaT细胞的光损伤模型。用不同质量浓度(10 mg·L~(-1)、20 mg·L~(-1)、40 mg·L~(-1)、80 mg·L~(-1)、100 mg·L~(-1))的泥鳅多糖作用于正常的HaCaT细胞,筛选泥鳅多糖的给药浓度。经60 mJ·cm~(-2)剂量UVB照射HaCaT细胞后,给予浓度为10 mg·L~(-1)的泥鳅多糖处理,用MTT法检测细胞活性,用分光光度法检测细胞内超氧化物歧化酶(superoxide dismutase,SOD)活性和丙二醛(malondialdehyde,MDA)水平。结果:经60 mJ·cm~(-2)剂量UVB照射后,与对照组比较,模型组HaCaT细胞活性显著下降,SOD活性显著下降,MDA水平显著升高。40 mg·L~(-1)以上的泥鳅多糖对细胞增殖有显著的抑制作用,选择10 mg·L~(-1)的泥鳅多糖作为给药浓度,与模型组比较,泥鳅多糖处理能显著提高细胞活性,提高SOD活性,降低MDA水平,显著减轻了细胞的光损伤程度,差异均有统计学意义(P0.05)。结论:泥鳅多糖能够通过提高细胞内SOD活性,加速清除活性氧,抑制膜脂过氧化,增强细胞的抗氧化能力,对UVB诱导的HaCaT细胞光损伤有显著的保护作用。     

红景天苷对乙醇诱导L-02肝细胞氧化损伤的保护作用

目的:探讨红景天苷对乙醇诱导的人L-02肝细胞氧化损伤的保护作用。方法:体外检测不同浓度梯度的红景天苷对人L-02肝细胞活性的影响;建立体外乙醇处理诱导的氧化损伤细胞模型,并以不同浓度红景天苷进行处理24h,检测肝细胞MDA水平、SOD和GSH-Px的活性。结果:与正常对照组相比,乙醇模型组MDA水平显著上升,SOD、CAT和GSH-Px的活性明显下降(P<0.05),经红景天苷处理,MDA水平下降,SOD和GSH-Px的活性活力显著上升(P<0.05)。结论:红景天苷可以减轻脂质过氧化程度,降低MDA含量,并提高肝细胞抗氧化的能力,使SOD和GSH-Px的活性升高,发挥了对肝细胞的保护作用。     

人参三醇组甙、VitE及VitC 对紫外辐射致皮肤损伤的防护机制初探

目的:探讨紫外辐射致皮肤损伤的药物防护机制.方法:以细胞凋亡、细胞周期及细胞内SOD、H2O2为观察指标,研究人参三醇组甙及VitE、VitC对UVB致人角质形成细胞(Colo16)损伤的保护作用.结果:一定剂量UVB可诱导明显的皮肤角质形成细胞发生S期阻滞和细胞凋亡,可使细胞内SOD下降、H2O2升高,人参三醇组甙及VitE、VitC对其均有不同程度的保护作用:减少S期细胞数、抑制细胞凋亡、激活细胞内SOD活性、降低细胞内H2O2.结论:紫外线照射后细胞内氧自由基变化可能是紫外线致皮肤损伤的机理之一.     

参芩仿生化提取物对中波紫外线照射致生物体损伤的保护作用

目的通过人参、黄芩仿生化提取物,对中波紫外线(UVB)照射致人永生化角质形成细胞(HaCaT)及小鼠皮肤损伤的保护作用进行研究,为中药抗辐射提供理论依据。方法采用MTT法检测HaCaT细胞生存率,黄嘌呤氧化酶法检测细胞溶解液中及小鼠皮肤组织匀浆中超氧化物歧化酶(SOD)活性,硫代巴比妥酸法检测细胞溶解液中及小鼠皮肤组织匀浆中丙二醛(MDA)含量变化。结果参芩仿生化提取物能够显著提高UVB照射损伤细胞的活性,明显升高细胞溶解液及小鼠皮肤组织匀浆中SOD活力,降低MDA含量。结论参芩仿生化提取物对UVB辐射致HaCaT细胞和小鼠皮肤损伤均有明显的保护作用,能够有效的抵抗UVB所致的氧化损伤。     

枸杞多糖在UVB辐射人角质形成细胞氧化损伤中的保护作用

目的利用中波紫外线辐射体外培养的人角质形成细胞（HaCaT）建立紫外线损伤模型,探讨枸杞多糖（LBP）在紫外线辐射HaCaT氧化损伤中的作用及其机制,为抗氧化剂的研发提供理论依据。方法在HaCaT培养的基础上设置空白对照组、UVB照射组和不同浓度的LBP干预组,采用UVB辐射HaCaT进行造模,运用酶生化法检测不同浓度的枸杞多糖对UVB辐射HaCaT后的细胞增殖及抗氧化酶的影响。结果 UVB辐射对HaCaT造成明显损伤,LBP可提高UVB辐射后HaCaT细胞增值活性（MTT）,提高超氧化物歧化酶（SOD）和谷胱甘肽过氧化物酶（GSH-Px）活性,降低丙二醛（MDA）产生。（P〈0.05）。结论 UVB对HaCaT细胞有损伤作用,LBP可拮抗UVB所致HaCaT细胞抗氧化酶活性的降低,从而具有抗氧化光保护作用。     

UVA对人角质形成细胞的氧化损伤作用

①目的　探讨紫外线A(UVA)对人角质形成细胞氧化损伤的机制。②方法　用 5J/cm2 UVA照射角质形成细胞 ,酶生化法检测活性氧 (ROS)的含量及超氧化物歧化酶 (SOD)、谷胱甘肽过氧化物酶 (GSH PX)活性的变化 ,流式细胞仪测定紫外线对角质形成细胞凋亡的影响 ,原位杂交技术观察 p2 1mRNA的变化 ,并与非照射组比较。③结果　与对照组比较 ,UVA照射组ROS含量升高 (t =113.6 8,P <0 .0 0 1) ,SOD、GSH PX活性下降 (t =5 7.2 3、19.0 4 ,P <0 .0 0 1) ,细胞凋亡率升高 (t=5 3.2 8,P <0 .0 0 1) ,p2 1mRNA表达增强。④结论　UVA对人角质形成细胞的损伤与氧自由基生成增多及细胞抗氧化能力抑制有关     

芦荟多糖对UVB辐射人角质形成细胞氧化损伤的保护作用

目的利用中波紫外线辐射体外培养人永生化角质形成细胞株（HaCaT细胞株）建立紫外线损伤人表皮细胞的模型,探讨芦荟多糖（AP）在紫外辐射HaCaT细胞氧化损伤中的保护作用及其机制。方法在HaCaT细胞培养的基础上,采用UVB辐射HaCaT后,立即加入AP进行干预,同时设置空白组与UVB对照组,分别运用MTT法及生化比色法检测不同浓度的芦荟多糖对UVB辐射人角质形成细胞增殖及抗氧化酶活性的影响。结果 UVB辐射对HaCaT造成明显损伤,AP可提高UVB辐射后HaCaT细胞增值活性,提高超氧化物歧化酶（SOD）和谷胱甘肽过氧化物酶（GSH-Px）活性,降低脂质过氧化物酶（MDA）活性（P〈0.05）。结论 UVB对HaCaT细胞有损伤作用,AP可拮抗UVB所致HaCaT细胞抗氧化酶活性的降低,具有光保护作用。     

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.