Effect of goldenseal (Hydrastis canadensis) and kava kava (Piper methysticum) supplementation on digoxin pharmacokinetics in humans.

Phytochemical-mediated modulation of P-glycoprotein (P-gp) and other drug transporters may give rise to many herb-drug interactions. Serial plasma concentration-time profiles of the P-gp substrate, digoxin, were used to determine whether supplementation with goldenseal or kava kava modified P-gp activity in vivo. Twenty healthy volunteers were randomly assigned to receive a standardized goldenseal (3210 mg daily) or kava kava (1227 mg daily) supplement for 14 days, followed by a 30-day washout period. Subjects were also randomized to receive rifampin (600 mg daily, 7 days) and clarithromycin (1000 mg daily, 7 days) as positive controls for P-gp induction and inhibition, respectively. Digoxin (Lanoxin, 0.5 mg) was administered p.o. before and at the end of each supplementation and control period. Serial digoxin plasma concentrations were obtained over 24 h and analyzed by chemiluminescent immunoassay. Comparisons of area under the curve (AUC)((0-3)), AUC((0-24)), C(max,) CL/F, and elimination half-life were used to assess the effects of goldenseal, kava kava, rifampin, and clarithromycin on digoxin pharmacokinetics. Rifampin produced significant reductions (p < 0.01) in AUC((0-3)), AUC((0-24)), CL/F, t(1/2), and C(max), whereas clarithromycin increased these parameters significantly (p < 0.01). With the exception of goldenseal's effect on C(max) (14% increase), no statistically significant effects on digoxin pharmacokinetics were observed following supplementation with either goldenseal or kava kava. When compared with rifampin and clarithromycin, supplementation with these specific formulations of goldenseal or kava kava did not appear to affect digoxin pharmacokinetics, suggesting that these supplements are not potent modulators of P-gp in vivo.     

济川煎加味治疗老年糖尿病合并便秘24例

便秘是老年糖尿病患者的常见合并症之一.笔者自2006年6月～2007年6月以济川煎为基础方加味治疗老年糖尿病患者合并便秘24例,现报道如下. 　　……     

兔骨髓间充质干细胞Ⅱ型胶原表达的实验研究

目的探讨兔骨髓间充质干细胞表达Ⅱ型胶原的实验研究方法。方法利用β1转化生长因子腺病毒表达载体（Ad—TGFβ1）转染兔骨髓间充质干细胞（MSCs），观察转染后的Ⅱ型胶原表达。结果细胞转染后Ⅱ型胶原在免疫印记和免疫组化检测下均呈强阳性表达。结论Ad—TGFβI转染兔骨髓MSCs可使其细胞内Ⅱ型胶原表达阳性。     

Liposome-mediated transfer of vascular endothelial growth factor cDNA augments survival of random-pattern skin flaps in the rat.

Tissue engineering is an application for gene therapy that is in its infancy. We show that simple liposomal-mediated gene transfer could result in a potentially useful biological effect in the field of wound healing. cDNA encoding the 165 amino acid form of vascular endothelial growth factor complexed to commercially available liposomes was injected into rat skin 1 week before raising a random pattern 3 x 10 cm flap. The flap survival was enhanced by 14 percent, and was accomplished without accessing the arterial inflow of the territory. These results were statistically significant (p<0.002) and reproducible. No adverse effects were seen. Histological analysis of the angiogenesis localized much of the new vessel formation to the area around the hair follicles. Polymerase chain reaction amplification of extracted flap tissue confirmed the presence of the transgene.     

胶原蛋白海绵在皮肤扩张术中的应用

目的：观察胶原蛋白海绵在皮肤扩张术中的临床应用效果。方法：选择40例（个）皮肤扩张器埋置和50例（个）皮肤扩张器取出及15例自身对照的病例组,应用胶原蛋白海绵术中贴敷于渗血创面,术后观察其吸收、止血效果。结果：术中渗血于2～10min内停止,病例组中无血肿发生,术后引流量明显减少,伤口愈合时间缩短。结论：在皮肤扩张术中胶原蛋白海绵是一种良好的生物止血材料。     

包裹外毒素Ⅲ的VEGF-脂质体靶向杀伤肿瘤血管内皮细胞的实验研究

目的 利用包裹绿脓杆菌外毒素单元Ⅲ的VEGF(血管内皮生长因子)-脂质体于体外靶向杀伤肿瘤血管内皮细胞。方法 通过结合实验。验证VEGF连接脂质体对肿瘤血管内皮细胞具有特异结合能力。利用体外细胞毒实验(MTT)方法，检测外毒素单元Ⅲ及靶向脂质体包裹的单元Ⅲ对肿瘤血管内皮细胞的杀伤作用。结果 连有VEGF的脂质体可与表达血管内皮生长因子受体(VEGFR)的肿瘤血管内皮细胞特异性结合。结合率可达非特异性脂质体的2倍。在去除外毒素单元Ⅰ和Ⅱ后，单元Ⅲ的细胞毒作用消失。但包裹单元Ⅲ的VEGF-脂质体可特异性杀伤肿瘤血管内皮细胞。结论 VEGF-脂质体可特异性地识别肿瘤血管内皮细胞。并作为良好载体将绿脓杆菌外毒素单元Ⅲ带入细胞，实现其杀伤作用，可望成为一种有效的抗肿瘤物质。     

超声造影诊断肝孤立性坏死结节的价值

目的:探讨超声造影诊断肝孤立性坏死结节的价值。材料和方法:回顾分析了12例肝孤立性坏死结节的超声造影表现。结果:12例病灶造影动脉期、门脉期、实质期均无增强,呈边界清晰的造影剂充盈缺损区。结论:超声造影对诊断肝孤立性坏死结节具有较高的价值。目的:探讨超声造影诊断肝孤立性坏死结节的价值。材料和方法:回顾分析了12例肝孤立性坏死结节的超声造影表现。结果:12例病灶造影动脉期、门脉期、实质期均无增强,呈边界清晰的造影剂充盈缺损区。结论:超声造影对诊断肝孤立性坏死结节具有较高的价值。     

In vivo Regulation of Prolactin Gene Expression in the Male Rat: Role of Sex Steroids and Dopamine

The influence of sex steroids and the dopaminergic system on the in vivo modulation of prolactin (PRL) mRNA levels was investigated by quantitative in situ hybridization in the male rat anterior pituitary gland. In situ hybridization was performed using a [³⁵S]-labeled cDNA probe encoding PRL. Orchiectomy performed 14 days earlier did not modify PRL mRNA levels. In orchiectomized rats treatment with the dopaminergic agonist bromocriptine for 14 days decreased PRL mRNA levels by 30%, while in intact animals the same treatment did not induce any changes in PRL mRNA levels. Administration of the dopamine D₂ receptor antagonist haloperidol in both intact and orchiectomized rats induced a 4-fold increase in mRNA levels. Administration of dihydrotestosterone to orchiectomized animals which had been treated or not with haloperidol or bromocriptine did not modify PRL mRNA levels. In orchiectomized animals administration of 17ß-estradiol (0.25 μg twice daily) for 14 days caused a 4-fold increase in amounts of PRL mRNA. Administration of bromocriptine to 17ß-estradiol-treated animals induced a 15% decrease of PRL mRNA levels compared to those obtained by 17ß-estradiol administered alone. The concomitant administration of 17ß-estradiol and haloperidol resulted in a 50% increase in PRL mRNA levels compared to those measured in animals treated with haloperidol alone. The present results clearly demonstrate that in vivo estrogen as well as dopamine-mediated mechanisms play a regulatory role in PRL mRNA levels in the male rat.     

前列腺癌中PIM-1的表达及其临床意义

目的 探讨PIM-1在前列腺癌中的表达及临床意义。方法 逆转录-聚合酶链反应（RT—PCR）半定量分析2例良性前列腺增生（BPH）和5例前列腺癌（PCa）组织标本中PIM-1mRNA表达，免疫组织化学法检测20例BPH、20例高分级前列腺上皮内瘤（HGPIN）和42例PCa组织标本中PIM-1蛋白表达水平，染色结果分为阴性、弱阳性、阳性和强阳性。结果 5例PCa组织PIM-1mRNA表达相对值分别为0．63、0．55、0．42、0．91、0．76，2例BPH中其相对值为0．26、0．27。BPH、HGPIN和PCa组织中PIM-1蛋白阴性表达率分别为60％（12／20）、20％（4／20）和2％（1／42），弱阳性表达率分别为40％（8／12）、20％（4／20）和12％（5／42），阳性列强阳性表达率分别为0（0／20）、60％（12／20）和86％（36／42），PCa中PIM-1蛋白表达水平高于HGPIN和BPH（P值均〈0．05）。PIM-1蛋白表达水平随PCa的临床分期和病理分级增高而增强，在有和没有淋巴结转移PCa组织中PIM-1强阳性表达率分别为70％（7／10）、25％（8／32），差异有统计学意义（P〈0．05）。结论PIM-1高表达可能与PCa发生和发展相关，PIM-1表达水平与PCa分期、Gleason评分呈正相关，可能成为PCa预后判断的肿瘤标志物。