一种新型增殖型腺病毒治疗肝癌的体外研究

目的评价增殖腺病毒 CNHK500对肝癌细胞的治疗效果。方法利用病毒增殖实验、细胞活力实验(MTT)、蛋白印迹分析来检测增殖病毒 CNHK500在端粒酶阳性的肝癌细胞株 HepGⅡ、Hep3B、SMMC7721及正常细胞中选择性增殖和溶解细胞的特性。结果 CNHK500感染人肝癌细胞株 HepGⅡ、Hep3B、SMMC7721细胞后大量增殖,在感染后96小时增殖倍数分别为52000、396984.9和632911.3倍,同野生型5型腺病毒(wtAd5)类似。然而在正常细胞中,CNHK500的增殖能力较 wtAd5大大减弱,感染96小时后仅增殖3.1～100倍,而 wtAd5却高达3160～17357倍。MTT 实验观察到在肝癌细胞 HepGⅡ和 Hep3B 中,感染后第7天达到半数杀伤的 MOI 值(IC50)分别为2和0.01,而在正常成纤维细胞 BJ 细胞中却高达1000。在常氧情况下,用蛋白印迹可在肿瘤细胞中检测到腺病毒 E1A 蛋白的表达,但在正常细胞却检测不到。E1B 蛋白仅在缺氧条件下(0.1%O_2)的肿瘤细胞中表达。结论实验结果表明 CNHK500能有效地选择性在肝癌细胞中增殖、复制、杀伤,而在正常细胞中增殖和溶解细胞能力却大大减弱。联合治疗基因,CNHK500可能为肝癌的治疗提供一种新的策略。     

脾虚证胃粘膜形态DNA cAMP微量元素改变的临床与实验研究

目的研究脾虚证实质、脾虚证与胃癌发生的关系。方法采用 IBAS2000型图象分析系统、501B 型扫描电镜附有9100/60型能量色散 X 分析仪,以及组织化学与放射免疫方法,检测脾虚证患者胃粘膜超微结构、肠化生亚型、DNA、cAMP、微量元素及其氧化物。结果脾虚色滞证患者中胃癌发生率、不完全性结肠型肠化生发生率和"背景病变"发生率均显著高于脾气虚证患者;胃粘膜 cAMP、Zn、Cu、ZnO 和 Cuo 含量,随着肠化生完全性至不完全性、小肠型至结肠型的顺序递减;而 DNA 含量则随以上顺序递增,P<0.05～0.001。胃粘膜不完全性结肠型肠化生组织内 DNA、cAMP、Zn、Cu、ZnO 和 CuO 含量则与胃癌组织同元显著性差异。结论脾虚气滞证胃病有癌变倾向;不完全性结肠型肠化生与胃癌的发生有密切关系。@何雪芬$目的!研究脾虚证实质、脾虚证与胃癌发生的关系。方法采用 IBAS2000型图象分析系统、501B 型扫描电镜附有9100/60型能量色散 X 分析仪,以及组织化学与放射免疫方法,检测脾虚证患者胃粘膜超微结构、肠化生亚型、DNA、cAMP、微量元素及其氧化物。结果脾虚色滞证患者中胃癌发生率、不完全性结肠型肠化生发生率和"背景病变"发生率均显著高于脾气虚证患者;胃粘膜 cAMP、Zn、Cu、ZnO 和 Cuo 含量,随着肠化生完全性至不完全性、小肠型至结肠型的顺序递减;而 DNA 含量则随以上顺序递增,P<0.05～0.001。胃粘膜不完全性结肠型肠化生组织内 DNA、cAMP、Zn、Cu、ZnO 和 CuO 含量则与胃癌组织同元显著性差异。结论脾虚气滞证胃病有癌变倾向;不完全性结肠型肠化生与胃癌的发生有密切关系。@尹玉芬$目的!研究脾虚证实质、脾虚证与胃癌发生的关系。方法采用 IBAS2000型图象分析系统、501B 型扫描电镜附有9100/60型能量色散 X 分析仪,以及组织化学与放射免疫方法,检测脾虚证患者胃粘膜超微结构、肠化生亚型、DNA、cAMP、微量元素及其氧化物。结果脾虚色滞证患者中胃癌发生率、不完全性结肠型肠化生发生率和"背景病变"发生率均显著高于脾气虚证患者;胃粘膜 cAMP、Zn、Cu、ZnO 和 Cuo 含量,随着肠化生完全性至不完全性、小肠型至结肠型的顺序递减;而 DNA 含量则随以上顺序递增,P<0.05～0.001。胃粘膜不完全性结肠型肠化生组织内 DNA、cAMP、Zn、Cu、ZnO 和 CuO 含量则与胃癌组织同元显著性差异。结论脾虚气滞证胃病有癌变倾向;不完全性结肠型肠化生与胃癌的发生有密切关系。     

Addition of felodipine to metoprolol vs replacement of metoprolol by felodipine in patients with angina pectoris despite adequate beta-blockade: Results of the Felodipine ER and Metoprolol CR in Angina (FEMINA) Study

AIMS: The study aimed to compare the addition of felodipine to metoprolol,and of the replacement of metoprolol by felodipine, with continuationof metoprolol, in patients with angina pectoris despite optimalbeta-blockade. METHODS AND RESULTS: The study was double-blind, parallel, randomized and controlled,and comprised 363 patients from 27 outpatient cardiology clinicsin the Netherlands. The patients had angina and positive bicycleexercise tests despite optimal beta-blockade (resting heartrate <65 beats . min^–1). Randomization was to threetreatment groups: continuation of metoprolol (control), additionof felodipine to metoprolol, and replacement of metoprolol byfelodipine. Exercise tests were repeated after 2 and 5 weeks.The main outcome measure was: exercise result after 5 weeks,compared with baseline, between-group comparison of changesvs control. There were no significant differences in exerciseduration and onset of chest pain vs control. The addition offelodipine increased time until 1 mm ST depression (43 s, 95%confidence interval 20–65 s), and decreased both ST depressionat highest comparable work load (0·46 mm, 95% confidenceinterval 0·19–0·72), and maximal ST depression(0·49 mm, 95% confidence interval 0·23–0·74).Exercise results after replacement of metoprolol by felodipinewere not different from control, apart from a significant increasein rate pressure product. Significantly more patients experiencedadverse events in the felodipine monotherapy group. CONCLUSION: Combination of metoprolol and felodipine is to be preferredto felodipine monotherapy in patients who have signs and symptomsof myocardial ischaemia despite optimal beta-blockade.     

Perceived Discrimination and Religiosity as Potential Mediating Factors Between Migration and Depressive Symptoms: A Transnational Study of an Indigenous Mayan Population

Evidence suggests that in the US perceived discrimination among migrants of Mexican origin is associated with depressive symptoms. Factors that confer resilience, such as religiosity, could serve as a mediating factor in the context of migration stressors. We hypothesized that migration is associated with higher depressive symptoms and that discrimination and religiosity would mediate this relationship in a binational (US and Mexican) sample of indigenous Mexican migrants. We applied path analysis modeling to test our hypotheses with a sample of 650 individuals (n = 583 in Mexico; n = 67 in US). Results indicated that migration experience and current US residence were associated with perceived discrimination, which in turn were associated with a higher risk for depressive symptoms. Among women not living in the US, religiosity was associated with lower perceived discrimination. Discrimination is pervasive among male and female transnational and domestic migrants and religiosity may serve as a protective factor against discrimination for some women.     

中西医结合治疗外阴色素减退性疾病55例临床观察

目的观察中西医结合治疗外阴色素减退性疾病的近期及远期疗效。方法将100例患者随机分为2组。治疗组55例以中药外阴熏洗配合自制复方维生素B6软膏涂擦、微波局部照射综合治疗;对照组45例以2％氢化可的松软膏涂擦治疗,3个月后、1年后对近期疗效与远期疗效进行比较。结果治疗组和对照组近期治愈率分别为27．27％、8．89％（P〈0．05）,有效率分别为100．00％、82．22％（P〉0．05）;远期有效率治疗组和对照组分别为87．27％、26．67％（P〈0．01）;复发率分别为12．73％、73．33％（P〈0．01）。结论中西医结合疗法治疗外阴色素减退性疾病疗效显著。     

银屑病和日光性角化病皮损应用氨基-γ-酮戊酸荧光染色后肉眼荧光强度与原卟啉Ⅸ含量的相互关系

应用5-氨基-γ-酮戊酸（ALA）诱导的卟啉荧光诊断（FDAP）中，肉眼可观察到原卟啉IX（PpIX）沉积。因操作重复性低，且涉及PpIX肿瘤选择的机制知之甚少，所以解释荧光数据仍有些困难。本研究中，作者要研究FDAP后银屑病和日光性角化病（AK）患者皮损的PpIX沉积情况。基于此目的，将患者脱屑区皮损和无皮损正常皮肤用20％ALA油孵育3h，进行FDAP，取强荧光区皮损和无皮损处皮肤活检。从活检标本中提取PpIX、蛋白质和双链DNA行荧光分光光度法定量，用图像分析软件分析由FDAP获得的数字图像。     

Inhibiting effect of antisense hTRT on telomerase activity of human liver cancer cell line SMMC-7721

Objective: To induce changes in biological character of human liver cancer cell line SMMC-7721 by blocking the expression of telomerase genes hTRT and to explore its value in cancer gene therapy. Methods: The vehicle for eukaryotic expression of antisense hTRT was constructed and then transfected into SMMC-7721 cells. The effects of antisense hTRT gene on telomerase activity, cancer cell growth and malignant phenotypes were analyzed. Results: The obtained transfectants that could express antisense hTRT gene stably showed marked decrease in telomerase activity;the shortening of telomere was obvious; cells presented contact growth inhibition; in nude mice transplantation, the rate of tumor induction dramatically decreased. Conclusion : Antisense hTRT gene expression can significantly inhibit telomerase activity of cancer cells and decrease malignant phenotypes in vitro and in vivo. Therefore, as a telomerase inhibitor, antisense hTRT gene may be a new pathway for cancer therapy.     

原发性肝癌切除术后肝外脏器复发转移的临床研究

目的:了解影响原发性肝癌(PLC)患者术后肝外脏器转移性复发的因素,并提出相应治疗措施.方法:通过临床回顾性调查获取明确诊断的PLC术后发生远处转移的46例病人,对初次手术时的临床病理因素、出现转移复发灶时的临床因素及复发后的治疗因素进行统计处理,分析其与复发后生存率的关系.结果:①PLC术后,肝外转移复发最常见的脏器为肺、骨骼,且大多伴有残肝复发.②有肝外转移复发时,生存率明显低于单纯肝内复发者.③与复发后生存率有关的因素包括:临床病期、肿瘤分化程度、及时有效地控制残肝复发灶及切除肝外转移复发灶.结论:对肝外脏器转移复发灶的治疗原则是:在积极有效地控制残肝复发灶的前提下,尽可能切除转移灶,可望延长复发后生存时间.