实验动物皮肤病原真菌检测方法的改良

目的对实验动物皮肤病原真菌2种培养方法进行了比较。方法将采集到的3只皮肤真菌感染病兔样品经由沙氏平皿法和沙氏试管斜面培养法分别进行培养。结果在3只真菌感染病兔中应用试管斜面法我们只检测到1例皮肤病原真菌阳性,而采用沙氏平皿法3例阳性全部检出。结论结合临床检测经验,我们认为本研究的沙氏平皿法优于沙氏试管斜面法,在实验动物皮肤病原真菌常规检测中具有推广应用价值。     

Clinical Impact of Tumour Involvement of the Anastomotic Doughnut in Oesophagogastric Cancer Surgery

INTRODUCTION

Published colorectal cancer surgery data suggest no role for the analysis of the anastomotic doughnuts following anterior resection. The usefulness of routine histological analysis of the upper gastrointestinal doughnut is not clear. Our study assessed the impact of cancer involvement of the doughnut on clinical practice. Factors associated with doughnut involvement and the effect on patients'' survival were also analysed.

PATIENTS AND METHODS

The clinicopathological details of 462 patients who underwent potentially curative oesophagogastrectomy for cancer with a stapled anastomosis between 1994 and 2006 in two specialist centres were retrospectively analysed. Univariate, multivariate and survival analyses were carried out.

RESULTS

Approximately 5% of doughnuts (22 of 462) were histologically involved with cancer. Microscopic involvement of the proximal resection margin, local lymph node metastasis and lymphatic invasion within the main resected specimen were independently associated with doughnut involvement (all P < 0.05). However, these three factors taken together failed to predict doughnut involvement. Doughnut involvement was an independent adverse prognostic factor for overall survival (P = 0.0013).

CONCLUSIONS

In contrast to findings in colorectal surgery, doughnut involvement with cancer appears to have useful prognostic information following oesophagogastrectomy. Routine histological analysis of upper gastrointestinal doughnuts is justified. Doughnut involvement could potentially strengthen the indications for adjuvant therapy in the future.     

Breast Gangrene in an HIV-Positive Patient

Introduction

Breast gangrene has been reported as a complication following puerperal sepsis, breast surgery, nipple piercings, warfarin toxicity, etc. We report a case of primary breast gangrene in an HIV-positive individual which, to the best of our knowledge, is the first of its kind.

Case report

A 40-year-old previously healthy woman presented with fulminating left breast gangrene. She was detected to be HIV positive. Mastectomy was performed. The detailed management of the condition is discussed.

Conclusion

Severe necrotising infections may be initial manifestations of HIV infection and patients with such infections should be screened for HIV.     

Occupational voice demands and their impact on the call-centre industry

Background  

Within the last decade there has been a growth in the call-centre industry in the UK, with a growing awareness of the voice as an important tool for successful communication. Occupational voice problems such as occupational dysphonia, in a business which relies on healthy, effective voice as the primary professional communication tool, may threaten working ability and occupational health and safety of workers. While previous studies of telephone call-agents have reported a range of voice symptoms and functional vocal health problems, there have been no studies investigating the use and impact of vocal performance in the communication industry within the UK. This study aims to address a significant gap in the evidence-base of occupational health and safety research. The objectives of the study are: 1. to investigate the work context and vocal communication demands for call-agents; 2. to evaluate call-agents' vocal health, awareness and performance; and 3. to identify key risks and training needs for employees and employers within call-centres.     

直视下尿道内切开术的再认识

目的：观察直视下尿道内切开术（DVIU）的长期疗效,重新评价DVIU的临床应用价值。方法：回顾性分析2003年1月～2007年1月收治的65例尿道狭窄或闭锁患者行DVIU及术后随访的临床资料：狭窄长度0．5～2．0cm,平均1．2cm。其中≤1．0cm者25例,1．1～2．0cm者40例。30例行尿道超声检查测量尿道瘢痕厚度,其中瘢痕厚度≤1cm者10例,〉1cm者20例,瘢痕长度和厚度均≤1cm者9例。结果：65例共行DVIU72例次,72例次内切开手术均获得成功。63例获得随访,随访时间24～60个月,平均40．5个月。48例（76．2％）因狭窄复发而最终接受开放手术。尿道超声显示瘢痕厚度≤1cm的10例中,只有1例接受手术;瘢痕厚度〉1cm的20例中,18例接受手术;瘢痕长度和厚度均≤1cm的9例均未行手术。结论：DVIU适合于狭窄段和瘢痕厚度均〈1cm的患者,切开次数以1次为宜,手术疗效与严格掌握适应证密切相关。     

尿道狭窄患者围手术期尿液TGF-β1变化的分析研究

目的:探讨尿道狭窄患者围手术期尿液TGF-β1浓度变化情况以及影响该浓度的相关因素.方法:使用ELISA试剂盒对29例尿道狭窄患者术前1个月及术后1个月尿液中TGF-β1进行测定及记录.同期取泌尿系统其他手术的14例患者作为对照组,测定其术后1个月尿液中TGF-β1浓度.结果:检测结果显示实验组在接受手术治疗后尿液中TGF-β1含最较对照组有显著增高(P＜0.05).同时实验组患者术前和术后尿液TGF-β1浓度也存在明显差异(P＜0.05).在相关性因素的分析中,前尿道狭窄患者术后尿液中TGF-β1含量的变化幅度较后尿道狭窄患者更为显著(P＜0.05),同时采用自体组织替代技术较传统端端吻合技术以及内镜切开技术更能引起尿液中TGF-β1的明显变化(P＜0.05).但年龄、既往手术次数均未能引起患者术后TGF-β1的变化.结论:狭窄部位、手术方式都与患者尿液中 TGF-β1的含量存在一定的联系,而年龄及既往手术史等因素未发现与患者体内TGF-β1含量有较大的联系.     

马钱子碱抗肝细胞癌作用的实验研究

目的 探讨马钱子碱抗肝细胞癌的作用及其机制.方法 体外培养人肝癌SMMC-7721细胞,加入不同浓度的马钱子碱(2.5～400μg/ml),细胞培养72 h,MTT法测定细胞生长抑制率.Western blotting和荧光定量RT-PCR技术分别测定培养24、48、72 h肝癌细胞PCNA、Cyclin D1、FAS基因mRNA和蛋白表达.结果 随着马钱子碱用量逐渐增加,对人肝癌细胞SMMC-7721生长抑制作用增强,马钱子碱用量为320 μg/ml时对肝癌细胞生长抑制率接近100%.马钱子碱作用肝癌细胞24 h与作用48 h相比,Fas蛋白和mRNA表达差异无统计学意义(分别F=2.547,1.582,均P＞0.05),作用72 h时差异有统计学意义(分别F=1.036,1.137,均P＜0.05);PCNA和Cyclin D1的mRNA和蛋白表达各时间点差异无统计学意义(PCNA分别F=3.612,2.174,3.029;Cyclin D1分别F=2.361,2.915,1.976,均P＞0.05).结论 马钱子碱抑制肝癌细胞生长,可能通过肝癌细胞FAS基因和蛋白表达增加,诱导肝癌细胞凋亡发挥抑制作用,而与PCNA和Cyclin D1作用无关.

Abstract：

Objective To study the effect of brucine on the growth of a hepatocellular carcinoma cell line in vitro. Methods Brucine was added into a liver cancer cell line of SMMC-7721 in vitro, at drug concentration of brucine from 2. 5 μg/ml to 400 μg/ml. The inhibition rate of cell growth was measured by MTT technique after the cells were cultured for 72 hours. The protein and mRNA expression of PCNA,cyclin D1 and FAS were respectively assayed with Western blotting and fluorescent quantitation RT-PCR techniques at 24, 48, 72 h. Results The inhibition rate of liver cancer cell was near 100% when the brucine concentration was at 320 μg/ml. The protein and mRNA expression of FAS were of no significant difference at 24 h vs 48 h ( seperately F = 2. 547,1. 582, all P ＞ 0. 05 ), and significant difference existed at 24 h vs 72 h( seperately F = 1. 036, 1. 137, all P ＜ 0. 05 ). The protein and mRNA expression of PCNA,Cyclin D1 were of no significant difference between various time period( seperately PCNA F = 3.612,2. 174,3.029;Cyclin D1 F=2.361,2.915,1.976,all P＞0.05). Conclusions Brucine inhibits the growth of liver cancer cells, by inducing increased apoptosis of the cells probably through FAS overexpression.     

茶多酚治疗慢性酒精性肝损伤的实验研究

目的 建立酒精性肝病大鼠模型,观察茶多酚对酒精性肝病大鼠血清氨基转移酶活性和肝脏病理变化的影响,探讨茶多酚对酒精性肝损伤的防治作用。 方法 SD大鼠分成3组:酒精组(酒精7g·kg-1·d-1灌胃)、茶多酚组(酒精7g·kg-1·d-1 茶多酚0.25g·kg-1·d-1灌胃)和对照组(等渗盐水灌胃)。各组分别于4周末、12周末和24周末处死大鼠留取肝脏标本,用于HE染色和Masson染色。 结果 酒精组大鼠血清氧基转移酶水平较对照组升高,茶多酚组大鼠与酒精组相比,其值有明显降低,差异有统计学意义(P<0.05)。HE染色显示酒精组大鼠肝细胞浆出现不同程度的脂肪变性,小叶各带可见不同程度的点、灶状或片状坏死,24周大鼠可见桥接坏死。Masson三色染色可见24周大鼠汇管区边缘有绿染胶原纤维包绕增生,肝窦中可见绿染胶原纤维分布。茶多酚组肝脂肪变和炎症程度轻于酒精组,未发现桥接坏死。 结论 茶多酚对酒精性肝损伤具有一定的保护作用。     

Global transcription profiling of estrogen activity: estrogen receptor alpha regulates gene expression in the kidney

Estrogen receptors (ERs) are expressed in numerous organs, although only a few organs are considered classical targets for estrogens. We have completed a systematic survey of estrogen regulation of approximately 10,000 genes in 13 tissues from wild-type and ERbetaKO mice treated sc with vehicle or 17beta-estradiol (E2) for 6 wk. The uterus and pituitary had the greatest number of genes regulated by E2, whereas the kidney had the third largest number of regulated genes. In situ hybridizations localized E2 regulation in the kidney to the juxtamedullary region of the cortex in both the mouse and rat. The ED(50) for gene inductions in the kidney was 3 micro g/kg.d, comparable with the 2.4 micro g/kg.d ED(50) for c-fos induction in the uterus. E2 regulations in the kidney were intact in ERbetaKO mice, and the ERalpha-selective agonist propylpyrazole triol acted similarly to E2, together suggesting an ERalpha-mediated mechanism. Several genes were induced within 2 h of E2 treatment, suggesting a direct activity of ERalpha within the kidney. Finally, the combination of the activation function (AF)1-selective agonist tamoxifen plus ERalphaKO(CH) mice expressing an AF1-deleted version of ERalpha allowed delineation of genes with differing requirements for AF1 or AF2 activity in the kidney.