UCP2对紫外线诱导细胞凋亡的影响

研究表明,紫外线辐射诱导细胞内活性氧(ROS)过度累积是导致细胞氧化损伤的最直接因素之一。长波紫外线(UVA)或中波紫外线(UVB)照射角质形成细胞后均可引起DNA损伤,UVA主要是通过生成ROS间接损伤DNA,UVB则是直接损伤DNA[1-2]。线粒体是细胞中的膜性结     

人参皂苷对皮肤细胞紫外线的辐射损伤的保护作用

目的检测人参皂苷对小鼠皮肤细胞和JB6 C141细胞株的抗紫外线B的损伤作用。方法通过对细胞照射后存活率的检测、单细胞电泳和软克隆集落形成实验,评估人参皂苷对细胞的照射后DNA修复抗损伤能力。以及人参皂苷对EGF诱导的皮肤细胞恶性转化能力的抑制作用。结果人参皂苷能有效地对紫外线B造成的细胞致死性损起抑制作用（P〈0．05）,并且对EGF诱导的皮肤细胞转化作用也有明显的抑制作用（P〈0．05）。结论人参皂苷对皮肤细胞抗紫外线辐射损伤的保护作用明显,能显著提高细胞存活率。     

低剂量γ射线照射后小鼠脾细胞外液对胸腺细胞DNA辐射抗性的作用

目的:通过观察小鼠脾细胞在给予不同低剂量γ射线体外照射,其细胞外液对胸腺细胞DNA辐射抗性和损伤修复的作用,探讨适应性反应的可能发生机制。方法:将小鼠脾细胞分组给予不同剂量(0,0.5,2.0,4.0,8.0cGy)的诱导剂量(D1)的γ射线照射后,收集其细胞外液,分别加入到胸腺细胞中,给予攻击剂量(D2)15Gy照射,观察脾细胞外液对胸腺细胞DNA的辐射抗性的影响;胸腺细胞给予D2照射后,加入对照或2cGy照射后的脾细胞外液,用FADU法检测DNA链断裂程度。结果:经1～4cGy照射后的脾细胞外液使胸腺细胞DNA的损伤程度(Qd)减小,其中以2cGy照射组最为明显(P<0.01),并且其DNA修复率增加。结论:适当的D1照射后的脾细胞外液可诱导出胸腺细胞DNA对D2的抗性,并且能促进胸腺细胞DNA损伤后的修复功能。分析细胞间的信息传递可能影响低剂量辐射诱导的适应性反应。     

单细胞碱性凝胶电泳用于检测小鼠胸腺细胞DNA链断裂

目的 引进单细胞凝胶电泳(SCGE)实验方法,用以检测小鼠胸腺细胞DNA链断裂。方法 载有经紫外线和H2O2作用过的胸腺细胞和凝胶的玻片首先在pH10的弱碱性裂解液中作用1h,在电泳缓冲液中解旋30min,电泳30min,胸腺细胞核用20mg／L的EB染色5min,用荧光显微镜和显微细胞图像分析系统观察和分析H2O2和紫外线在体外条件下对正常胸腺细胞的DNA损伤作用。结果 紫外线和不同浓度H2O20．001、0．01、0．1、1．0mmoL／L均可导致小鼠胸腺细胞DNA损伤,且随着H2O2浓度的增加DNA损伤逐渐加重。结论 SCGE可用于检测小鼠胸腺细胞DNA链断裂,使用这一实验方法成功地检测出H2O2和紫外线引起的胸腺细胞DNA损伤。     

紫外线致成纤维细胞损伤及VitE保护作用的研究

目的观察UVB辐射对体外培养的真皮成纤维细胞的损伤作用及VitE对细胞的光保护作用。方法由健康人皮肤中分离培养成纤维细胞,用紫外线以一定时间(1、5、10、15分钟)进行照射,并加入VitE进行干预处理。MTT法检测细胞增殖活性,荧光显微镜检测各受试组细胞凋亡率。结果UVB照射后24h,上述细胞均出现增殖活性下降,活性下降程度与照光时间成正比;加入VitE处理后,细胞活性可有一定程度恢复。UVB照射可诱导真皮成纤维细胞产生凋亡,其凋亡率随UVB照射时间延长而增加。加入VitE处理后,各组HeLa上皮细胞和成纤维细胞凋亡率均明显下降。结论紫外线辐射可引起真皮成纤维细胞损伤,VitE可抑制紫外线辐射的损伤效应。     

茶多酚抗晶状体上皮细胞凋亡的体外研究及机制

目的：探讨抗氧化剂茶多酚对氧化损伤所诱发的晶状体上皮细胞凋亡的抑制作用和相关机制.方法：分离培养兔晶状体上皮细胞,茶多酚处理24～72h后,采用透射电镜、流式细胞术、凋亡细胞DNA片断分析检测茶多酚抗晶状体上皮细胞凋亡的作用,并用Western-blot检测凋亡相关蛋白bcl-2、Bax、caspase-3蛋白表达变化,揭示茶多酚抑制晶状体上皮细胞凋亡的相关机制.结果：氧化损伤型晶状体上皮细胞生理盐水处理组中,凋亡细胞增多,G1期细胞升高,DNA片断分析呈现典型的凋亡细胞特征性“梯状条带”;茶多酚处理组中,凋亡细胞明显减少,G1期细胞降低,未出现特征性“梯状条带”,凋亡相关蛋白bcl-2增多、Bax降低、caspase-3蛋白减少.结论：抗氧化剂茶多酚可抑制H2O2氧化损伤所诱导的兔晶状体上皮细胞凋亡并减轻或延缓白内障形成,其机制与bcl-2、Bax及细胞凋亡过程中最重要的终末执行酶caspase-3蛋白表达变化密切相关.     

紫外线致HeLa细胞损伤作用的研究

目的观察UVB辐射对体外培养的HeLa细胞的损伤作用。方法培养HeLa细胞,用紫外线以一定时间(1、5、10、15分钟)进行照射。MTT法检测细胞增殖活性,荧光显微镜检测各受试组细胞凋亡率。结果UVB照射后24h,上述细胞均出现增殖活性下降,活性下降程度与照光时间成正比;UVB照射可诱导HeLa细胞产生凋亡,其凋亡率随UVB照射时间延长而增加。结论紫外线辐射可引起真皮成纤维细胞损伤。     

丹参和枸杞对中波紫外线损伤角质形成细胞的保护作用

目的:观察丹参和枸杞对中波紫外线(UVB)损伤角质形成细胞的保护作用及作用机制。方法:用丹参和枸杞对HaCaT细胞进行预处理24小时,采用20、40、60mJ/cm2剂量的UVB照射细胞,以MTT法检测细胞生存率,以酶联免疫吸附实验检测细胞上清液中TNF-α及IL-1β的分泌量。结果:角质形成细胞损伤程度与UVB照射剂量有关,丹参和枸杞均可提高UVB照射后角质形成细胞的生存率,丹参可抑制角质形成细胞释放TNF-α和IL-1β;枸杞只抑制TNF-α的释放,而对IL-1β无明显抑制作用。结论:UVB对角质形成细胞有损伤作用,且与剂量相关;丹参、枸杞可以通过降低UVB引起的炎症因子TNF-α和(或)IL-1β的分泌从而减轻紫外线辐射引起的皮肤损伤。     

硒对紫外线诱导HLF细胞凋亡的保护作用

目的：探讨紫外线诱导人HLF细胞凋亡时DNA降解特点，以及硒对紫外线诱导细胞凋亡的保护作用。方法：紫外线分别照射体外培养的人肺成纤维细胞3min和5min，同时添加亚硒酸钠（8ng/ml），设立对照组。利用吖啶橙荧光染料染色鉴定凋亡细胞，利用琼脂糖凝胶电泳检测DNA ladder。结果：紫外线可以诱导人肺成纤维细胞（28代）凋亡，作用存在时间效应关系。紫外线诱导人肺成纤维细胞凋亡时，未出现典型的DNA ladder现象。硒对于紫外线诱导的细胞凋亡有显著的抑制作用。结论：DNA ladder不能作为细胞凋亡的唯一的标志，紫外线诱导的细胞凋亡与DNA ladder的出现并不总是一致的。硒具有拮抗紫外线诱导的细胞凋亡作用。     

紫外线致HeP-G2细胞调亡的分子机制初探

紫外线 (UV)是人类最常接触的具基因毒作用的因子。为探索紫外线辐射致细胞凋亡和组织损伤的分子机制 ,本研究采用免疫细胞化学技术与特异性抗体初步探索了经紫外线辐射处理的Hep G2细胞P5 3、Caspase3、bcl 2和P2 1等与细胞凋亡和生长抑制基因的表达情况。结果表明经紫外线辐射处理的Hep G2细胞的P5 3、Caspase3和bcl 2基因表达增加 ,而P2 1未见明显改变 ,提示P5 3、Caspase基因在紫外线辐射诱导的细胞凋亡中起重要作用 ,bcl 2增高可能有抑制细胞的过度凋亡 ,保持内在平衡的作用。P2 1保持不变或下降可能反映了细胞对DNA损伤应答的新途径。     

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.     

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.     

Electro-Acupuncture Combined with the Trigger Point Needle-Embedding for Treatment of Primary Trigeminal Neuralgia in 31 Cases

In recent years, the author of this essay has applied electro-acupuncture combined with the trigger point needle-embedding for treatment of primary trigeminal neuralgia in 31 cases, yielding satis- factory results as reported in the following.     

Investigation of Matrix Metalloproteinase -1, 2 and tissue inhibitor of matrix metalloproteinases-1 in Endometriosis

Objective： To explore the role of matrix metalloproteinase-1,2 （MMP-1, MMP-2） and tissue inhibitor of matrix metalloproteinases-1 （TIMP-1） in endometriosis. Methods： The eutopic and ectopic endometria from 40 subjects suffering from endometriosis and regular.endometria from 40 subjects （excluding endometriosis） were collected and examined by in situ hybridization technology and western blot assay. Results： Both expressions of MMP-1 and -2 were stronger in ectopic endometrium and eutopic endometrium than in normal endometrium. On the contrary, the expression of TIMP-1 in ectopic endometrium and eutopic endometrium was lower. The differences were significant （P 〈 0.01 ）. Moreover, there was no relationship among the expressions of MMP-1, 2 and TIMP-1 in ectopic endometrium. Conclusion： The expressions of MMP-1, 2 and TIMP-1 lose balance and lack of periodic changes in ectopic endometrium , which explains the biological invasive behavior of endometriosis. It was suggested-that regulating the balance between the MMPs and TIMP-1 should be an ideal therapeutic target to endometriosis.     

Shi Da-zhuo (史大卓) —An outstanding cardiologist of integrative medicine

Prof. SHI Da-zhuo, Ph.D., male, was born on March 20, 1960. Prof. SHI entered the Ph.D. program in 1990 at the China Academy of Chinese Medical Sciences under the supervision of Prof. CHEN Ke-ji, majoring in the treatment of cardiovascular diseases. After receiving his Ph.D. degree in 1993, Prof. SHI started working at the Cardiovascular Center in Xiyuan Hospital affiliated to China Academy of Chinese Medical sciences.     

Persist in and Carry Forward the Integrative Medical Research——Speech at the 6th National General Congress of Chinese Association of Integrative Medicine by Academician CHEN Zhu,Minister of Ministry of Health

The 6th National General Congress of Chinese Association of Integrative Medicine （CALM） was convened at 19-20, April 2008 in Beijing. Academician CHEN Zhu, the minister of Ministry of Health indicated at the congress that the integration of Chinese and Western medicine is very well in keeping with the situation of our country and the general rule of development in medical science; and as a good integration of Chinese medicine and Western medicine, it is mutually beneficial and advantageous to both of them. Seeing the creativity shown in integrative medical investigation in theoretic and methodological sides, we should and must persist in and develop it.