BACKGROUND & AIMS: :Outside the nasopharynx, undifferentiated carcinomas occur only rarely at other head and neck locations. Although the association between undifferentiated nasopharyngeal carcinoma and Epstein-Barr virus (EBV) is consistent, there is conflicting evidence as to the association of EBV with undifferentiated carcinomas outside the nasopharynx. Here, we report on a case of undifferentiated carcinoma of the tongue base. A 71-year-old male, who had been treated with irradiation for primary unknown right neck metastatic EBV-positive undifferentiated carcinoma 9 years previously, was referred to our clinic with masses at the tongue base and right neck. The lesion at the tongue base was revealed to be an EBV-positive undifferentiated carcinoma. He was treated with resection of tongue base tumor and bilateral-neck dissection, and the defect at the tongue base was reconstructed with a free rectus abdominis myocutaneous flap. Re-irradiation was added post-operatively because of a positive surgical margin at the tongue base. The patient is presently alive without recurrence or distant metastasis 20 months after treatment. Although it is unclear whether our case is recurrent or newly developed EBV-latently infected undifferentiated carcinoma, we propose that EBV-associated tumors should be carefully observed after treatment at least for more than 10 years.

背景与目标： ：在鼻咽以外，未分化癌仅在其他头颈部位置很少发生。尽管未分化的鼻咽癌和爱泼斯坦-巴尔病毒（EBV）之间的关联是一致的，但关于EBV与鼻咽外未分化癌的关联有相互矛盾的证据。在这里，我们报道一例未分化舌基癌。一位71岁的男性在9年前接受过放射治疗，原发性右颈部转移性EBV阳性原发性未分化癌已经接受过放射治疗，现被转诊至我们的诊所，舌根和右颈部有肿块。舌根处的病变显示为EBV阳性未分化癌。对他进行了舌根肿瘤切除术和双侧颈淋巴结清扫术，并用游离的腹直肌肌皮瓣修复了舌根缺损。由于舌根的手术切缘阳性，因此在术后增加了再次照射。治疗后20个月，该患者目前尚无复发或远处转移。尽管尚不清楚我们的病例是复发的还是新发的EBV潜伏感染的未分化癌，但我们建议治疗至少10年后应仔细观察与EBV相关的肿瘤。

BACKGROUND & AIMS: AIMS:Case reports suggest an interaction between rofecoxib and the CYP1A2 substrate tizanidine. Our objectives were to explore the extent and mechanism of this possible interaction and to determine the CYP1A2 inhibitory potency of rofecoxib. METHODS:In a randomized, double-blind, two-phase cross-over study, nine healthy subjects took 25 mg rofecoxib or placebo daily for 4 days and, on day 4, each ingested 4 mg tizanidine. Plasma concentrations and the urinary excretion of tizanidine, its metabolites (M) and rofecoxib, and pharmacodynamic variables were measured up to 24 h. On day 3, a caffeine test was performed to estimate CYP1A2 activity. RESULTS:Rofecoxib increased the area under the plasma concentration-time curve (AUC(0-infinity)) of tizanidine by 13.6-fold [95% confidence interval (CI) 8.0, 15.6; P < 0.001), peak plasma concentration (C(max)) by 6.1-fold (4.8, 7.3; P < 0.001) and elimination half-life (t(1/2)) from 1.6 to 3.0 h (P < 0.001). Consequently, rofecoxib markedly increased the blood pressure-lowering and sedative effects of tizanidine (P < 0.05). Rofecoxib increased several fold the tizanidine/M-3 and tizanidine/M-4 ratios in plasma and urine and the tizanidine/M-5, tizanidine/M-9 and tizanidine/M-10 ratios in urine (P < 0.05). In addition, it increased the plasma caffeine/paraxanthine ratio by 2.4-fold (95% CI 1.4, 3.4; P = 0.008) and this ratio correlated with the tizanidine/metabolite ratios. Finally, the AUC(0-25) of rofecoxib correlated with the placebo phase caffeine/paraxanthine ratio (r = 0.80, P = 0.01). CONCLUSIONS:Rofecoxib is a potent inhibitor of CYP1A2 and it greatly increases the plasma concentrations and adverse effects of tizanidine. The findings suggest that rofecoxib itself is also metabolized by CYP1A2, raising concerns about interactions between rofecoxib and other CYP1A2 substrate and inhibitor drugs.

背景与目标： 目的：病例报告表明罗非考昔与CYP1A2底物替扎尼定之间存在相互作用。我们的目标是探索这种可能的相互作用的程度和机制，并确定罗非昔布对CYP1A2的抑制作用。
方法：在一项随机，双盲，两阶段交叉研究中，九名健康受试者每天服用25毫克罗非考昔或安慰剂，持续4天，并在第4天，每人摄入4毫克替扎尼定。在长达24小时内测量替扎尼定，其代谢产物（M）和罗非考昔的血浆浓度和尿排泄，以及药效学变量。在第3天，进行了咖啡因测试以评估CYP1A2的活性。
结果：罗非昔布将替扎尼定的血浆浓度-时间曲线下面积（AUC（0-无穷大））增加了13.6倍[95％置信区间（CI）8.0、15.6； P <0.001），峰值血药浓度（C（max））从1.6到3.0 h的6.1倍（4.8，7.3; P <0.001）和消除半衰期（t（1/2））（P <0.001） 。因此，罗非昔布显着增强了替扎尼定的降压和镇静作用（P <0.05）。罗非昔布将血浆和尿液中替扎尼定/ M-3和替扎尼定/ M-4的比例提高了几倍，尿液中替扎尼定/ M-5，替扎尼定/ M-9和替扎尼定/ M-10的比例提高了几倍（P <0.05）。此外，它使血浆咖啡因/对黄嘌呤比率增加了2.4倍（95％CI 1.4、3.4； P = 0.008），并且该比率与替扎尼定/代谢产物比率相关。最后，罗非昔布的AUC（0-25）与安慰剂相咖啡因/对黄嘌呤的比​​例相关（r = 0.80，P = 0.01）。
结论：罗非昔布是一种有效的CYP1A2抑制剂，它大大提高了血浆浓度和替扎尼定的不良反应。研究结果表明罗非考昔本身也被CYP1A2代谢，引起对罗非考昔与其他CYP1A2底物和抑制剂药物之间相互作用的担忧。

BACKGROUND & AIMS: :The prevalence of mRNAs coding for the sea urchin embryo regulatory factors P3A1 and P3A2 was measured by single-strand probe excess solution hybridization. P3A1 and P3A2 are not homologous proteins, though they both bind specifically to a particular cis-regulatory sequence. Interaction at this target site is known to be required for lineage-specific expression of an aboral ectoderm-specific gene and probably for several other genes as well. Genome blot hybridizations show that both factors are encoded by single-copy genes. Maternal mRNAs for both factors are present at less than 10(3) molecules per egg, which places them in the rare mRNA class. During development to the mesenchyme blastula stage, the amount of P3A1 mRNA (per embryo) increases severalfold while that of P3A2 remains approximately constant. Specification of the aboral ectoderm founder cells and of their initial patterns of gene expression must occur during early to mid-cleavage stage. Therefore, the regulatory proteins needed for this process must be produced by this stage. We show that the quantities of the P3A proteins that can be synthesized from the numbers of mRNA molecules present in the large blastomeres of the early embryo are sufficient to be functional, because these proteins will be accumulated in the nuclei. Thus maternal P3A1 or P3A2 proteins asre not required, nor were these detected in earlier studies. Furthermore, differential spatial (as well as temporal) distribution of both of these newly synthesized factor species could result from the unequal cleavage pattern utilized in the sea urchin egg.

背景与目标： ：通过单链探针过量溶液杂交测量编码海胆胚胎调节因子P3A1和P3A2的mRNA的发生率。尽管P3A1和P3A2都与特定的顺式调控序列特异性结合，但它们不是同源蛋白。已知该靶标位点的相互作用是特定于宗族的外胚层特异性基因的谱系表达所必需的，并且可能还需要其他几个基因。基因组印迹杂交显示这两个因子均由单拷贝基因编码。每个鸡蛋的母体mRNA均少于10（3）个分子，这使它们处于罕见的mRNA类中。在发育到间充质囊阶段期间，P3A1 mRNA（每个胚胎）的数量增加了几倍，而P3A2的数量则保持大致恒定。胎盘外胚层基础细胞及其基因表达的初始模式的规范必须在卵裂早期至中期进行。因此，必须在该阶段生产该过程所需的调节蛋白。我们表明，可以从早期胚胎的大型卵裂球中存在的mRNA分子数量合成的P3A蛋白数量足以发挥功能，因为这些蛋白将积聚在细胞核中。因此，不需要母体P3A1或P3A2蛋白，也不需要在早期研究中检测到这些蛋白。此外，这两种新合成的因子物种在空间（以及时间）上的差异分布可能是由于海胆卵中使用的不均等卵裂模式造成的。

BACKGROUND & AIMS: :The distributed genome hypothesis (DGH) states that each strain within a bacterial species receives a unique distribution of genes from a population-based supragenome that is many times larger than the genome of any given strain. The observations that natural infecting populations are often polyclonal and that most chronic bacterial pathogens have highly developed mechanisms for horizontal gene transfer suggested the DGH and provided the means and the mechanisms to explain how chronic infections persist in the face of a mammalian host's adaptive defense mechanisms. Having previously established the validity of the DGH for obligate pathogens, we wished to evaluate its applicability to an opportunistic bacterial pathogen. This was accomplished by construction and analysis of a highly redundant pooled genomic library containing approximately 216,000 functional clones that was constructed from 12 low-passage clinical isolates of Pseudomonas aeruginosa, 6 otorrheic isolates and 6 from other body sites. Sequence analysis of 3,214 randomly picked clones (mean insert size, approximately 1.4 kb) from this library demonstrated that 348 (10.8%) of the clones were unique with respect to all genomic sequences of the P. aeruginosa prototype strain, PAO1. Hypothetical translations of the open reading frames within these unique sequences demonstrated protein homologies to a number of bacterial virulence factors and other proteins not previously identified in P. aeruginosa. PCR and reverse transcription-PCR-based assays were performed to analyze the distribution and expression patterns of a 70-open reading frame subset of these sequences among 11 of the clinical strains. These sequences were unevenly distributed among the clinical isolates, with nearly half (34/70) of the novel sequences being present in only one or two of the individual strains. Expression profiling revealed that a vast majority of these sequences are expressed, strongly suggesting they encode functional proteins.

背景与目标： ：分布式基因组假设（DGH）指出，细菌物种中的每个菌株都从基于种群的超基因组中获得独特的基因分布，其比任何给定菌株的基因组都要大很多倍。自然感染种群通常是多克隆的，大多数慢性细菌病原体具有水平基因转移的高度发达的机制的观点提出了DGH，并提供了解释哺乳动物宿主面对适应性防御机制时慢性感染如何持续存在的手段和机制。先前已确定DGH对专性病原体的有效性，我们希望评估其对机会细菌病原体的适用性。这是通过构建和分析包含约216,000个功能性克隆的高度冗余的集合基因组文库实现的，该文库由铜绿假单胞菌的12种低通道临床分离株，6种耳泻分离株和6个其他身体部位构建而成。对来自该文库的3,214个随机挑选的克隆（平均插入片段大小，约1.4 kb）进行序列分析，结果表明，对于铜绿假单胞菌原型菌株PAO1的所有基因组序列，其中348个（10.8％）克隆是唯一的。在这些独特序列内的开放阅读框的假想翻译证明了与许多细菌毒力因子和以前在铜绿假单胞菌中未鉴定出的其他蛋白质的蛋白质同源性。进行了基于PCR和逆转录PCR的分析，以分析这些序列的70个开放阅读框子集在11种临床菌株中的分布和表达模式。这些序列在临床分离株中分布不均，只有一半或34个新序列出现在一个或两个单独的菌株中。表达谱分析表明这些序列中的绝大多数都被表达，强烈暗示它们编码功能蛋白。

BACKGROUND & AIMS: :Through an endoscopic transvesico-transurethral approach, we closed a vesicovaginal fistula that occurred after hysterectomy in a patient with uterine leiomyoma. The 3-mm fistula, located in the midportion of retrotrigone, was resected transurethrally and sutured in two layers through two 5-mm suprapubic trocars placed into the bladder and the urethral route under pneumobladder. The patient had no urine leakage from the vagina after surgery.

背景与目标： ：通过内窥镜经膀胱-经尿道入路，我们关闭了子宫平滑肌瘤患者子宫切除术后发生的膀胱阴道瘘。将3毫米的瘘管位于后三角骨的中部，经尿道切除，并通过两根5毫米的耻骨上耻骨套管针将其缝合在两层中，然后将其插入膀胱和在气囊下的尿道。病人术后没有尿液从阴道漏出。

BACKGROUND & AIMS: AIM:This paper reviews how the interpreter's role is described in empirically based, qualitative cross-cultural interview studies and how trustworthiness is determined. BACKGROUND:Increased immigration during the past decades has created a multiethnic society in many countries. This development poses a challenge to healthcare staff, in that they need to understand how people from different cultures experience health and illness. One way to assess immigrants' experiences is through cross-cultural interview studies, involving an interpreter. Thorough knowledge of the interpreter's role is needed in order to increase the trustworthiness of this kind of nursing research. METHOD:Literature searches were conducted from October to November 2004 using PubMed, CINAHL, Psycinfo, Sociological abstract, Your Journals@ovid, and Eric databases. Qualitative interview studies written in English and performed with an interpreter were included. The Matrix Method was used to review the literature. FINDINGS:In almost all of the 13 relevant papers found, the role of the interpreter(s) in the research process was only sparsely described. In addition, all studies except one employed different techniques to established trustworthiness. The most common techniques were prolonged engagement, member check or triangulation, the latter performed either on the data, investigators or methods. CONCLUSION:Methodological issues with respect to interpreters have received only limited attention in cross-cultural interview studies. Researchers in the field of nursing need to consider (1) the interpreter's role/involvement in the research process; (2) the interpreter's competence and the style of interpreting; (3) the interpreter's impact on the findings. This information is a prerequisite when trying to determine the trustworthiness of a cross-cultural study.

背景与目标： 目的：本文回顾了如何在基于经验的定性跨文化访谈研究中描述口译员的角色，以及如何确定信任度。
背景：过去几十年来移民的增加在许多国家创建了一个多种族的社会。这种发展对医护人员提出了挑战，因为他们需要了解来自不同文化背景的人们如何经历健康和疾病。评估移民经验的一种方法是通过跨文化访谈研究，其中包括一名口译员。为了增加这种护理研究的可信度，需要对口译员的作用有透彻的了解。
方法：从2004年10月至2004年11月使用PubMed，CINAHL，Psycinfo，Sociological abstract，Your Journals @ ovid和Eric数据库进行文献检索。包括用英语撰写并由口译员进行的定性访谈研究。矩阵法用于回顾文献。
结果：在发现的所有13篇相关论文中，几乎都很少描述口译员在研究过程中的作用。此外，除一项研究外，所有研究均采用不同的技术来建立可信度。最常见的技术是长时间的接触，成员检查或三角剖分，后者根据数据，研究人员或方法进行。
结论：关于口译员的方法论问题在跨文化访谈研究中仅受到了有限的关注。护理领域的研究人员需要考虑（1）口译员在研究过程中的角色/参与程度； （二）口译人员的能力和口译风格； （3）口译员对调查结果的影响。在尝试确定跨文化研究的可信赖性时，此信息是前提条件。

BACKGROUND & AIMS: :A case of Meibomian carcinoma of the left eyelid was observed in a 53-year-old-female patient. SHe had been previously treated for chronic unilateral blepharoconjunctivitis; an excisional biopsy disclosed a Meibomian carcinoma. First a total resection of both left eyelids was performed with plastic reconstructive surgery, three months later a recurrence required an orbital exenteration. This case underlines the interest of an early diagnosis which allows a more conservative treatment. The diagnosis must be kept in mind in any case of chronic unilateral blepharoconjunctivitis; histopathology has a key role in the diagnosis of Meibomian carcinoma.

背景与目标： ：在一名53岁的女性患者中观察到左眼睑睑肌癌的病例。他曾接受过慢性单侧睑结膜炎的治疗；切除活检揭示了睑板癌。首先用整形外科手术对两个左眼皮进行全切，三个月后复发，需要眼眶切除。该病例强调了允许更保守治疗的早期诊断的兴趣。在任何情况下，慢性单侧睑结膜炎都必须牢记诊断；组织病理学在睑板癌的诊断中具有关键作用。

BACKGROUND & AIMS: STUDY OBJECTIVE:To examine the prevalence, symptomatology, risk factors, and other infections associated with urogenital chlamydial infection in pregnant teenagers. DESIGN:Retrospective case-control study by medical record review. SETTING:Prenatal care clinic for adolescents at University of Tennessee Medical Center, Knoxville, Tennessee. PARTICIPANTS:Pregnant adolescents younger than 19 years of age who were diagnosed with chlamydial infection on the first prenatal visit from 1988 to 1994 were studied. Pregnant adolescents of similar age and socioeconomic background who came in the same day for the first prenatal visit, but were not infected, made up the control group. INTERVENTION:Routine prenatal questionnaires regarding personal and medical histories, and routine prenatal screening, including pelvic examination with Papanicolaou (PAP) smear and laboratory investigations for common genital infections and sexual transmitted disease (STDs), were obtained. MAIN OUTCOME MEASURES:Analyzed the prevalence of chlamydial infection and compared the infected group to the control group with regard to race, behavioral factors, symptoms, prenatal screening results, other concurrent genital infections, and histories of STDs. RESULTS:Of a total population of 596 pregnant teenagers, 67 (11.24%) were infected with Chlamydia trachomatis. In multivariate analysis, black race (odds ratio [OR] = 4.01; 95% confidence interval [CI] = 1.74-9.23; p = 0.001) and greater gestational age at first prenatal visit (OR = 1.11; 95% CI = 1.04-1.18; p = 0.001) were independently associated with chlamydial infection. Age, marital status, number of pregnancies, smoking, alcohol abuse, drug abuse, age at first intercourse, and multiple sex partners were not associated with the infection. Likewise, the symptom of vaginal discharge (a complaint of > 70% in each group), other genital co-infections (found > 50% in each group, mainly candidiasis and bacterial vaginosis), abnormal PAP smears (found > 60% in each group) and histories of STDs or previous chlamydial infection were not significantly different between case and control groups. Human papillomavirus infection, trichomonal infection, and dysplasia or atypia were found more often in patients infected with chlamydia, but were not statistically significant. CONCLUSION:Pregnant adolescents in east Tennessee were at risk for chlamydial infection as well as for other genital infections and abnormal PAP smears. Routine prenatal chlamydial screening is warranted because of a lack of specific symptoms.

背景与目标： 目的：研究孕妇青少年泌尿生殖道衣原体感染的患病率，症状，危险因素和其他感染情况。
设计：回顾性病例对照研究，病历审查。
地点：田纳西州诺克斯维尔市田纳西大学医学中心的青少年产前保健诊所。
研究对象：1988年至1994年第一次产前检查时被诊断患有衣原体感染的19岁以下的青少年。年龄相同，社会经济背景相似的怀孕青少年在同一天进行第一次产前检查，但未感染，组成了对照组。
干预措施：获得有关个人和医学史的常规产前问卷，以及常规的产前筛查，包括用帕潘尼古拉（PAP）涂片进行盆腔检查以及常见生殖器感染和性传播疾病（STD）的实验室检查。
主要观察指标：分析衣原体感染的发生率，并比较种族，行为因素，症状，产前筛查结果，其他并发生殖器感染和性病史，比较感染者与对照组。
结果：在596名怀孕的青少年总数中，有67名（11.24％）感染了沙眼衣原体。在多变量分析中，黑人种族（赔率[OR] = 4.01； 95％置信区间[CI] = 1.74-9.23； p = 0.001）和第一次产前检查时的胎龄较高（OR = 1.11； 95％CI = 1.04- 1.18； p = 0.001）与衣原体感染独立相关。年龄，婚姻状况，怀孕次数，吸烟，酗酒，药物滥用，初次性交年龄和多性伴侣均与感染无关。同样，白带的症状（每组投诉> 70％），其他生殖器合并感染（每组发现> 50％，主要是念珠菌病和细菌性阴道病），PAP涂片异常（每发现> 60％）病例组和对照组之间的性病史或以前的衣原体感染史无显着差异。感染衣原体的患者更常发现人乳头瘤病毒感染，滴虫感染和异型增生或异型性，但无统计学意义。
结论：田纳西州东部的怀孕青少年有衣原体感染以及其他生殖器感染和PAP涂片异常的危险。由于缺乏特定症状，需要常规的产前衣原体筛查。

BACKGROUND & AIMS: :Agricultural soils of two Italian maize farms were treated for five years with an industrially produced high-quality compost. Cattle manure and the usual mineral fertilizer were used for comparison purposes. The effects of the organic and mineral fertilizer treatments were studied by analyzing the compost and manure, cultured soils, and harvested material. The grain yield was also determined. Organic fertilization improved soil pH, CEC, content of organic matter and NPK. Soil respiration and N mineralization were found to be higher than in the purely mineral-treated soil. Plant K take-up was improved, whereas grain yield was not affected. It was confirmed that organic fertilization, particularly compost use, maintained and increased soil fertility. The study demonstrated the feasibility of using in loco analytical facilities to follow the entire recycling process-from waste to compost production-and the use of the final product in the field.

背景与目标： ：意大利的两个玉米农场的农业土壤用工业生产的高质量堆肥处理了五年。为了比较，使用了牛粪和通常的矿物肥料。通过分析堆肥和肥料，耕种的土壤和收获的物料，研究了有机肥料和矿物肥料的处理效果。还确定了谷物产量。有机肥改善了土壤的pH，CEC，有机质含量和NPK。发现土壤呼吸和氮矿化比纯矿物处理过的土壤要高。钾素吸收量得到改善，而谷物单产却没有受到影响。可以肯定的是，有机肥，特别是堆肥的使用，保持并增加了土壤肥力。该研究证明了在机车分析设施中使用该方法以跟踪整个回收过程的可行性（从废物到堆肥的生产）以及最终产品在野外的使用。

BACKGROUND & AIMS: BACKGROUND:Current genomic research methods provide researchers with enormous amounts of data. Combining data from different high-throughput research technologies commonly available in biological databases can lead to novel findings and increase research efficiency. However, combining data from different heterogeneous sources is often a very arduous task. These sources can be different microarray technology platforms, genomic databases, or experiments performed on various species. Our aim was to develop a software program that could facilitate the combining of data from heterogeneous sources, and thus allow researchers to perform genomic cross-platform/cross-species studies and to use existing experimental data for compendium studies. RESULTS:We have developed a web-based software resource, called CROPPER that uses the latest genomic information concerning different data identifiers and orthologous genes from the Ensembl database. CROPPER can be used to combine genomic data from different heterogeneous sources, allowing researchers to perform cross-platform/cross-species compendium studies without the need for complex computational tools or the requirement of setting up one's own in-house database. We also present an example of a simple cross-platform/cross-species compendium study based on publicly available Parkinson's disease data derived from different sources. CONCLUSION:CROPPER is a user-friendly and freely available web-based software resource that can be successfully used for cross-species/cross-platform compendium studies.

背景与目标： 背景：目前的基因组研究方法为研究人员提供了大量数据。结合生物学数据库中常用的不同高通量研究技术的数据，可以得出新颖的发现并提高研究效率。但是，合并来自不同异构源的数据通常是一项艰巨的任务。这些来源可以是不同的微阵列技术平台，基因组数据库或对各种物种进行的实验。我们的目标是开发一个软件程序，以方便来自不同来源的数据的合并，从而使研究人员能够进行基因组跨平台/跨物种研究，并将现有的实验数据用于纲要研究。
结果：我们开发了一个基于Web的软件资源，称为CROPPER，该资源使用有关Ensembl数据库中不同数据标识符和直系同源基因的最新基因组信息。 CROPPER可用于组合来自不同异构来源的基因组数据，从而使研究人员无需复杂的计算工具或建立自己的内部数据库即可进行跨平台/跨物种纲要研究。我们还提供了一个简单的跨平台/跨物种纲要研究的例子，该研究基于从不同来源获得的公开可用的帕金森氏病数据。
结论：CROPPER是一种用户友好且免费提供的基于Web的软件资源，可以成功地用于跨物种/跨平台纲要研究。

BACKGROUND & AIMS: :A case of malignant ependymoma with extracranial metastases is reported. A 59-year-old male was admitted to our hospital with vomiting and ataxia. Following computed tomographic (CT) scanning indicating a ring-like enhanced mass in the cerebellum, the tumor was subtotally removed in December, 1985. Histological diagnosis was malignant ependymoma. A second operation was performed in February, 1987, due to recurrence of the tumor in the fourth ventricle. Postoperative radiation therapy at a total dose of 7780 rads was given over 2 years. Eleven months after radiation therapy was completed, he reported cough and multiple skin metastases. Chest x-rays showed metastases at the right hilus. Repeated CT scans revealed separate frontal cerebral metastatic tumors. He died of respiratory insufficiency. Extracranial metastases of infratentorial ependymoma to the skin and lung are rare pathological entities.

背景与目标： ：一例恶性室间隔膜瘤伴颅外转移的报道。一名59岁的男性因呕吐和共济失调入院。在计算机断层扫描（CT）扫描显示小脑环状肿块后，于1985年12月将肿瘤小块切除。组织学诊断为恶性室间隔膜瘤。由于第四脑室肿瘤的复发，于1987年2月进行了第二次手术。术后2年进行了总剂量为7780 rads的术后放射治疗。放疗结束11个月后，他报告出现了咳嗽和多处皮肤转移。胸部X光片显示右肺门有转移。重复的CT扫描显示单独的额叶脑转移瘤。他死于呼吸功能不全。颅下膜上室间隔瘤向皮肤和肺的颅外转移是罕见的病理学实体。

BACKGROUND & AIMS: UNLABELLED:The objective of the present study was to investigate whether the endogenous opioids are involved in the control of endothelin-1 release from the pituitary gland. To test this hypothesis we have measured the peripheral plasma concentration of ET-1 as well as the content of immunoreactive ET-1 (irET-1) in the pituitary in response to opioid receptors blockade in euhydrated and 24 h water-deprived Wistar-Kyoto rats. Placebo or naltrexone (50 micrograms/kg body wt.) were given i.v. in both groups. Trunk blood was collected to determine hematocrit, plasma sodium and ET-1 levels (RIA). Immunostaining of ET-1 in the whole pituitary glands was performed by colloidal gold labeling. The quantitative analysis of irET-1 was carried out under a light microscope using a computerized image analyzer (MultiScan). RESULTS:(1) Twenty-four-hour dehydration resulted in marked increase of peripheral concentration of ET-1. Naltrexone injection induced a significant elevation of ET-1 plasma concentration in both, dehydrated and control animals. (2) The content of irET-1 in anterior and intermediate lobes of the pituitary in dehydrated rats was markedly higher than in control group. (3) Naltrexone injection caused a rapid and significant reduction irET-1 within the anterior, intermediate and posterior lobes in dehydrated and control animals. CONCLUSIONS:(1) An elevation of irET-1 in the pituitary gland and peripheral circulation in dehydrated animals may play a role in maintaining of water-electrolyte balance. (2) The mu-opioid system appears to control the ET-1 release from the pituitary in normal and dehydrated animals.

背景与目标： 未标记：本研究的目的是调查内源性阿片类药物是否参与垂体中内皮素-1的释放。为了检验这一假设，我们测量了在无水和缺水24小时的Wistar-Kyoto中阿片受体阻滞后垂体中ET-1的外周血浆浓度以及免疫反应性ET-1（irET-1）的含量大鼠。静脉注射安慰剂或纳曲酮（50微克/千克体重）。在两组中。收集躯干血液以确定血细胞比容，血浆钠和ET-1水平（RIA）。 ET-1在整个垂体中的免疫染色是通过胶体金标记进行的。使用计算机图像分析仪（MultiScan）在光学显微镜下对irET-1进行定量分析。
结果：（1）脱水24小时导致ET-1的外周血浓度明显升高。纳曲酮注射液在脱水和对照动物中均引起ET-1血浆浓度的显着升高。 （2）脱水大鼠垂体前叶和中间叶中irET-1的含量明显高于对照组。 （3）纳曲酮注射液导致脱水和对照动物的前叶，中叶和后叶内irET-1迅速大量降低。
结论：（1）脱水动物垂体中irET-1的升高和外周循环可能在维持水电解质平衡中起着重要作用。 （2）在正常和脱水动物中，μ阿片样物质系统似乎可以控制ET-1从垂体的释放。

BACKGROUND & AIMS: :Recent findings suggest a pivotal role for mitochondria-associated hexokinase in the regulation of apoptosis in animal cells. In this study, virus-induced gene silencing (VIGS) of a hexokinase-encoding Hxk1 caused necrotic lesions on leaves, abnormal leaf morphology, and retarded plant growth in Nicotiana benthamiana. Hxk1 was associated with the mitochondria, and this association required the N-terminal membrane anchor. VIGS of Hxk1 reduced the cellular glucose-phosphorylating activity to approximately 31% of control levels without changing the fructose-phosphorylating activity and did not alter hexose phosphate content severely. The affected cells showed programmed cell death (PCD) morphological markers, including nuclear condensation and DNA fragmentation. Similar to animal cell apoptosis, cytochrome c was released into the cytosol and caspase-9- and caspase-3-like proteolytic activities were strongly induced. Furthermore, based on flow cytometry, Arabidopsis thaliana plants overexpressing Arabidopsis HXK1 and HXK2, both of which are predominantly associated with mitochondria, exhibited enhanced resistance to H(2)O(2)- and alpha-picolinic acid-induced PCD. Finally, the addition of recombinant Hxk1 to mitochondria-enriched fractions prevented H(2)O(2)/clotrimazole-induced cytochrome c release and loss of mitochondrial membrane potential. Together, these results show that hexokinase critically regulates the execution of PCD in plant cells, suggesting a link between glucose metabolism and apoptosis.

背景与目标： ：最近的发现表明线粒体相关的己糖激酶在调节动物细胞凋亡中起着关键作用。在这项研究中，编码己糖激酶的Hxk1的病毒诱导的基因沉默（VIGS）导致了本特烟草的叶片坏死性病变，异常的叶片形态并延缓了植物的生长。 Hxk1与线粒体相关联，这种关联需要N端膜锚。 Hxk1的VIGS可以将细胞的葡萄糖磷酸化活性降低至对照水平的约31％，而不会改变果糖磷酸化活性，并且不会严重改变磷酸己糖的含量。受影响的细胞显示出程序性细胞死亡（PCD）形态标志物，包括核浓缩和DNA片段化。与动物细胞凋亡相似，细胞色素c被释放到细胞质中，并强烈诱导了caspase-9-和caspase-3-like蛋白水解活性。此外，基于流式细胞仪，拟南芥植物过表达的拟南芥HXK1和HXK2，这两个主要与线粒体相关联，表现出增强的抗H（2）O（2）-和α-吡啶甲酸诱导的PCD。最后，向线粒体富集的部分中添加重组Hxk1可以防止H（2）O（2）/克霉唑诱导的细胞色素c释放和线粒体膜电位的损失。总之，这些结果表明，己糖激酶严格调节植物细胞中PCD的执行，表明葡萄糖代谢与细胞凋亡之间存在联系。

BACKGROUND & AIMS: BACKGROUND:Angiotensin-converting enzyme (ACE) inhibitors prevent the expansion and rupture of aortic aneurysms in animals. We investigated the association between ACE inhibitors and rupture in patients with abdominal aortic aneurysms. METHODS:We did a population-based case-control study of linked administrative databases in Ontario, Canada. The sample included consecutive patients older than 65 (n=15,326) admitted to hospital with a primary diagnosis of ruptured or intact abdominal aortic aneurysm between April 1, 1992, and April 1, 2002. FINDINGS:Patients who received ACE inhibitors before admission were significantly less likely to present with ruptured aneurysm (odds ratio [OR] 0.82, 95% CI 0.74-0.90) than those who did not receive ACE inhibitors. Adjustment for demographic characteristics, risk factors for rupture, comorbidities, contraindications to ACE inhibitors, measures of health-care use, and aneurysm screening yielded similar results (0.83, 0.73-0.95). Consistent findings were noted in subgroups at high risk of rupture, including patients older than 75 years and those with a history of hypertension. Conversely, such protective associations were not observed for beta blockers (1.02, 0.89-1.17), calcium channel blockers (1.01, 0.89-1.14), alpha blockers (1.15, 0.86-1.54), angiotensin receptor blockers (1.24, 0.71-2.18), or thiazide diuretics (0.91, 0.78-1.07). INTERPRETATION:ACE inhibitors are associated with a reduced risk of ruptured abdominal aortic aneurysm, unlike other antihypertensive agents. Randomised trials of ACE inhibitors for prevention of aortic rupture might be warranted.

背景与目标： 背景：血管紧张素转换酶（ACE）抑制剂可防止动物主动脉瘤的扩张和破裂。我们调查了腹主动脉瘤患者中ACE抑制剂与破裂之间的关系。
方法：我们在加拿大安大略省的相关行政数据库中进行了基于人群的病例对照研究。该样本包括1992年4月1日至2002年4月1日之间入院的65岁以上的连续患者（n = 15,326），其主要诊断为腹主动脉瘤破裂或完整。
结果：与未接受ACE抑制剂的患者相比，入院前接受ACE抑制剂的患者出现动脉瘤破裂的可能性显着降低（优势比[OR] 0.82，95％CI 0.74-0.90）。调整人口统计学特征，破裂危险因素，合并症，ACEI禁忌症，卫生保健措施和动脉瘤筛查得出相似的结果（0.83，0.73-0.95）。在高破裂风险的亚组中，包括在75岁以上的患者和有高血压病史的患者中，发现了一致的发现。相反，对于β受体阻滞剂（1.02，0.89-1.17），钙通道阻滞剂（1.01，0.89-1.14），α受体阻滞剂（1.15，0.86-1.54），血管紧张素受体阻滞剂（1.24，0.71-2.18）未观察到这种保护性关联。 ，或噻嗪类利尿剂（0.91、0.78-1.07）。
解释：与其他降压药不同，ACE抑制剂与降低腹主动脉瘤破裂的风险有关。 ACE抑制剂预防主动脉破裂的随机试验可能是必要的。

BACKGROUND & AIMS: :The ovarian steroid hormone estrogen (E2) elicits a multiplicity of both systemic and uterotropic responses in vivo. For example, the administration of E2 to ovariectomized (Ovx) and sexually immature rodents leads to uterine-specific inflammatory infiltrates. In this study, we quantitated the number of eosinophils and BM8+, Ia+, and CD4+ cells in uteri obtained from adult Ovx control and E2-treated C57BL/6J, C3H/HeJ, and (C57BL/6J x C3H/HeJ) (B6C3) F1 hybrid mice. All three strains exhibited a significant increase in the number of uterine eosinophils and BM8+ macrophages after E2 treatment. However, C57BL/6J and B6C3 F1 hybrid mice responded with a greater number of infiltrating eosinophils and macrophages as compared with C3H/HeJ. A similar analysis of Ia+ and CD4+ cells showed that E2 treatment either down-regulates or does not affect the number of such cells in all three strains. Genome exclusion mapping using a (C57BL/6J x C3H/HeJ) x C3H/HeJ backcross population localized Est1, the major locus controlling the number of eosinophils infiltrating the uterus after E2 treatment, to chromosome 4. In addition, suggestive linkage to marker loci on chromosomes 10 and 16 was detected and evidence for locus interaction is presented. Our results conclusively demonstrate that E2-regulated/ dependent responses can be genetically controlled, indicating that the phenotypic variation observed in both the normal and pathological effects of E2 may, in part, be due to a genetic component.

背景与目标： ：卵巢类固醇激素雌激素（E2）在体内引起多种全身和子宫促反应。例如，将E2给予去卵巢（Ovx）和性不成熟的啮齿动物会导致子宫特异性炎症浸润。在这项研究中，我们量化了从成年Ovx对照和经E2处理的C57BL / 6J，C3H / HeJ和（C57BL / 6J x C3H / HeJ）（B6C3）获得的子宫中嗜酸性粒细胞和BM8，Ia和CD4细胞的数量F1杂种小鼠。在E2处理后，所有三个菌株均表现出子宫嗜酸性粒细胞和BM8巨噬细胞数量的显着增加。但是，与C3H / HeJ相比，C57BL / 6J和B6C3 F1杂种小鼠反应的浸润性嗜酸性粒细胞和巨噬细胞数量更多。对Ia和CD4细胞的类似分析显示，E2处理在所有三个菌株中均下调或不影响此类细胞的数量。使用（C57BL / 6J x C3H / HeJ）x C3H / HeJ回交群体定位的基因组排斥定位于Est1，Est1是控制E2处理后浸润子宫的嗜酸性粒细胞数量的主要基因座，并指向染色体4。检测到10号和16号染色体上的DNA，并提供了基因座相互作用的证据。我们的结果最终证明，E2调节/依赖性反应可以通过基因控制，这表明在E2的正常和病理效应中观察到的表型变异可能部分归因于遗传成分。