BACKGROUND & AIMS: :The aquaporin-4 (AQP4) pool in the perivascular astrocyte membranes has been shown to be critically involved in the formation and dissolution of brain edema. Cerebral edema is a major cause of morbidity and mortality in stroke. It is therefore essential to know whether the perivascular pool of AQP4 is up- or down-regulated after an ischemic insult, because such changes would determine the time course of edema formation. Here we demonstrate by quantitative immunogold cytochemistry that the ischemic striatum and neocortex show distinct patterns of AQP4 expression in the reperfusion phase after 90 min of middle cerebral artery occlusion. The striatal core displays a loss of perivascular AQP4 at 24 hr of reperfusion with no sign of subsequent recovery. The most affected part of the cortex also exhibits loss of perivascular AQP4. This loss is of magnitude similar to that of the striatal core, but it shows a partial recovery toward 72 hr of reperfusion. By freeze fracture we show that the loss of perivascular AQP4 is associated with the disappearance of the square lattices of particles that normally are distinct features of the perivascular astrocyte membrane. The cortical border zone differs from the central part of the ischemic lesion by showing no loss of perivascular AQP4 at 24 hr of reperfusion but rather a slight increase. These data indicate that the size of the AQP4 pool that controls the exchange of fluid between brain and blood during edema formation and dissolution is subject to large and region-specific changes in the reperfusion phase.

背景与目标： : 血管周围星形胶质细胞膜中的aquaporin-4 (AQP4) 池已被证明与脑水肿的形成和溶解密切相关。脑水肿是中风发病和死亡的主要原因。因此，必须了解缺血性损伤后AQP4的血管周围池是上调还是下调，因为这种变化将决定水肿形成的时间过程。在这里，我们通过定量免疫金细胞化学证明，在大脑中动脉闭塞90分钟后，缺血纹状体和新皮层在再灌注阶段显示出不同的AQP4表达模式。再灌注24小时时，纹状体核心显示血管周围AQP4丢失，没有随后恢复的迹象。皮质中受影响最大的部分也表现出血管周围aqp4的损失。这种损失的幅度与纹状体核心的损失相似，但在再灌注72小时后显示部分恢复。通过冷冻断裂，我们表明血管周围AQP4的丢失与颗粒的正方形晶格的消失有关，这些正方形晶格通常是血管周围星形胶质细胞膜的独特特征。皮质边界区与缺血性病变的中央部分不同，在再灌注24小时时未显示血管周围AQP4的丢失，但略有增加。这些数据表明，在水肿形成和溶解过程中控制大脑和血液之间流体交换的AQP4池的大小在再灌注阶段会发生较大且区域特定的变化。

BACKGROUND & AIMS: The authors present their experience of secondary cholesteatomas of the middle ear explored by computerized tomography (CT). Following a brief anatomicopathological description of secondary petrous bone cholesteatomas, and of the CT technique used for their exploration, they describe and illustrate the classical "bag-shaped" internal or external attical forms usually extended to the antrum and the mastoid process, and the less common locations often due to relapse or postoperative recurrences (anterior hypotympanic or posterior mastoidal). The holotympanic forms, usually due to "lamellar" cholesteatomas, create diagnostic problems with other opacities in the cavity, as also do certain forms that are evacuated spontaneously or by aspiration. One of the qualities of CT lies in the preoperative extension assessment. The lesion may extend towards the internal wall of the cavity (lateral semicircular canal, second portion of the facial nerve), towards the labyrinth to the petrosal apex and/or the geniculate ganglion, and above all towards the inferior labyrinth which might bring the cholesteatoma into contact with large vessels (e.g. jugular vein bulb for postero-inferior extensions, carotid canal for antero-inferior extensions). Extension into anfractuosities of the cavity walls (sinus tympani, subratubal fossette) must be systematically looked for in order to avoid postoperative recurrences.

背景与目标： 作者介绍了通过计算机断层扫描 (CT) 探索的中耳继发性胆脂瘤的经验。在对继发性岩骨胆脂瘤以及用于其探索的CT技术进行了简要的解剖学病理学描述之后，他们描述并说明了通常扩展到胃窦和乳突过程的经典 “袋状” 内部或外部形态，较不常见的位置通常是由于复发或术后复发 (前低潮或后乳突)。通常由于 “层状” 胆脂瘤引起的全鼓形式，会在腔内产生其他混浊的诊断问题，以及自发或通过抽吸抽空的某些形式。CT的质量之一在于术前扩展评估。病变可以向腔的内壁 (外侧半规管，面神经的第二部分) 延伸，向迷宫延伸到岩骨尖和/或膝状神经节，最重要的是走向下迷宫，这可能会使胆脂瘤与大血管接触 (例如颈静脉球用于后下方延伸，颈动脉管用于前下方延伸)。为了避免术后复发，必须系统地寻找延伸到腔壁的骨折 (鼓室窦，支气管下窝)。

BACKGROUND & AIMS: :A retrospective study of male breast cancer was undertaken at Ouagadougou University Teaching Hospital over a 3 year period (1993-1996). Authors report 5 cases representing 4.16% of all breast cancers. The patients' mean age was 61 years. The average duration of signs and symptoms before the diagnosis was 13 months. Clinically all the 5 cases presented advanced cancers (4 T4N2M0, 1 T4N2M1 according to UICC TNM System) with size ranging from 5.5, to 11.5 cm. Histology found: 2 medullary infiltrating carcinoma, 1 canalar infiltrating carcinoma, 1 colloid mucous carcinoma and 1 lobular infiltrating carcinoma. All patients had mastectomy associated with axillary clearance in 4 cases. Radiotherapy, chemotherapy and hormonotherapy were not associated because unavailable in Burkina Faso. Three patients died: the first, 10 days after surgical treatment and the 2 others respectively after 14 and 17 months. We have lost sight 1 patients. The last one is still alive. Authors find that to get better prognosis, it is important to improve medical and technical means, to increase information and to promote early detection.

背景与目标： : 在瓦加杜古大学教学医院进行了为期3年 (1993-1996年) 的男性乳腺癌回顾性研究。作者报告了5例代表所有乳腺癌4.16% 的病例。患者的平均年龄为61岁。诊断前症状和体征的平均持续时间为13个月。临床上所有5例均表现为晚期癌症 (根据UICC TNM系统，4个T4N2M0，1个T4N2M1)，大小从5.5到11.5厘米。组织学发现: 髓质浸润性癌2例，管内浸润性癌1例，胶体粘液性癌1例，小叶浸润性癌1例。所有患者均行乳房切除术伴腋窝清除4例。放疗，化疗和激素治疗不相关，因为在布基纳法索不可用。3例患者死亡: 手术治疗后第1、10天，另外2例分别在14和17个月后死亡。我们已经看不见1个病人了。最后一个还活着。作者发现，要获得更好的预后，必须改善医疗和技术手段，增加信息并促进早期发现。

BACKGROUND & AIMS: :To assess the effect of the Expanded Program on Immunization (EPI) in rural Africa, blood samples were collected in two Kenyan sublocations. Serum antibodies against tetanus toxoid were measured in 155 individuals 1-70 years of age. Titers greater than the protective level of 0.01 IU/ml were found in 47% of the population. Protection was significantly higher in children born after the launching of the EPI (68%) and in women who had been at childbearing age since then (69%). Significantly lower protection was demonstrated in other age and sex-groups. The level of protection in children was equal in the two populations, whereas protection in fertile women was significantly lower in the population living a long distance from a health center. Diphtheria anti-toxin was measured in the samples from one sublocation, and 70 of 84 individuals (83%) had antibody levels greater than the protective level. No age or sex difference could be found, and there was no correlation between response levels to diphtheria and tetanus. This implicates natural infections as an important source of diphtheria antibodies. Our findings demonstrate a need for better coverage of the adult population against tetanus. Furthermore, diphtheria transmission still appears to take place, underscoring the importance of diphtheria vaccination of travelers to rural Africa.

背景与目标： : 为了评估扩大计划对非洲农村地区免疫接种 (EPI) 的影响，在两个肯尼亚子地点收集了血液样本。在1-70岁的155个体中测定抗破伤风类毒素的血清抗体。在47% 的人群中发现滴度大于0.01 IU/ml的保护水平。EPI启动后出生的儿童 (68%) 和此后处于育龄的妇女 (69%) 的保护明显更高。在其他年龄和性别组中，保护作用明显降低。在两个人群中，儿童的保护水平是相等的，而在距离保健中心较远的人群中，可育妇女的保护水平要低得多。在来自一个子位置的样品中测量白喉抗毒素，并且84个个体中的70个 (83%) 的抗体水平高于保护水平。未发现年龄或性别差异，对白喉和破伤风的反应水平之间没有相关性。这暗示自然感染是白喉抗体的重要来源。我们的发现表明，需要更好地覆盖成人人群以预防破伤风。此外，白喉传播似乎仍在发生，突显了对前往非洲农村的旅行者进行白喉疫苗接种的重要性。

BACKGROUND & AIMS: :The Bedford Orthopaedic Centre is situated in Umtata at the heart of the former homeland of the Transkei in the Eastern Cape of South Africa. It acts as an orthopaedic and trauma referral hospital for a mainly rural population approaching 4 million. This article focuses on the workload of the hospital over a 4-month period and like many hospitals in South Africa we highlight the difficulties it faces with the trauma epidemic.

背景与目标： : 贝德福德整形外科中心位于乌姆塔塔，位于南非东开普省特兰斯凯故居的中心。它是骨科和创伤转诊医院，主要是接近400万的农村人口。本文重点介绍了医院在4个月内的工作量，与南非的许多医院一样，我们强调了创伤流行所面临的困难。

BACKGROUND & AIMS: :African swine fever (ASF) is a major limiting factor for pig production in most of the countries in Sub-Saharan Africa and the Indian Ocean. In the absence of vaccine, a good understanding of the ecology and epidemiology of the disease is fundamental to implement effective control measures. In selected countries of Southern and East Africa, the association between Ornithodoros moubata ticks and warthogs has been described in detail in the literature. However, for many other countries in the region, information related to the sylvatic cycle is lacking or incomplete. In West African countries, for instance, the role of wild pigs in the epidemiology of ASF has never been demonstrated and the existence and potential impact of a sylvatic cycle involving an association between soft ticks and warthogs is questionable. In other countries, other wild pig species such as the bushpigs (Potamochoerus spp.) can also be asymptomatically infected by the virus but their role in the epidemiology of the disease is unclear and might differ according to geographic regions. In addition, the methods and techniques required to study the role of wild hosts in ASF virus (ASFV) epidemiology and ecology are very specific and differ from the more traditional methods to study domestic pigs or other tick species. The aim of this review is (i) to provide a descriptive list of the methodologies implemented to study the role of wild hosts in African swine fever, (ii) to compile the available knowledge about the sylvatic cycle of ASFV in different regions of Sub-Saharan Africa and the Indian Ocean in addition to the one that has been described for East and Southern Africa, and (iii) to discuss current methodologies and available knowledge in order to identify new orientations for further field and experimental surveys.

背景与目标： : 非洲猪发热 (ASF) 是撒哈拉以南非洲和印度洋大多数国家生猪生产的主要限制因素。在没有疫苗的情况下，充分了解疾病的生态学和流行病学是实施有效控制措施的基础。在南部和东部非洲的某些国家/地区，文献中已详细描述了鸟鸟和疣猪之间的联系。但是，对于该区域的许多其他国家来说，与sylvatic循环有关的信息缺乏或不完整。例如，在西非国家，野猪在ASF流行病学中的作用从未得到证实，涉及软蜱和疣猪之间关联的三角循环的存在和潜在影响值得怀疑。在其他国家/地区，其他野生猪物种 (例如丛林猪 (Potamochoerus spp。)) 也可能被该病毒无症状感染，但其在疾病流行病学中的作用尚不清楚，并且可能因地理区域而异。此外，研究野生宿主在ASF病毒 (ASFV) 流行病学和生态学中的作用所需的方法和技术非常具体，并且与研究家猪或其他tick物种的更传统方法不同。这篇综述的目的是 (i) 提供一份用于研究野生宿主在非洲猪发热中的作用的方法的描述性列表，(ii) 汇编关于撒哈拉以南非洲和印度洋不同地区ASFV的sylvatic循环的现有知识，以及已经描述的东非和南部非洲的知识，(iii) 讨论当前的方法和可用知识，以便为进一步的现场和实验调查确定新的方向。

BACKGROUND & AIMS: :Cognitive dysfunction syndrome is a major disease affecting old cats and is the consequence of severe and irreversible loss of brain cells and brain atrophy. The present study focused on the hypothesis that the optimal strategy for promoting successful brain ageing is to target risk factors associated with brain ageing and dementia. We used a nutritional strategy involving supplementation with a blend of nutrients (antioxidants, arginine, B vitamins and fish oil) to test this hypothesis. Middle-aged and old cats between 5·5 and 8·7 years of age were assigned to cognitively equivalent control or treatment groups based on prior cognitive experience and performance on baseline cognitive tests. The cats in the treatment group were maintained on a diet supplemented with the nutrient blend and the cats in the control group were maintained on the identical base diet without the additional supplementation. After an initial wash-in period, all cats were tested on a battery of cognitive test protocols. The cats fed the test diet showed significantly better performance on three of four test protocols: a protocol assessing egocentric learning, a protocol assessing discrimination and reversal learning and a protocol focused on acquisition of a spatial memory task. The results support the hypothesis that brain function of middle-aged and old cats can be improved by the nutrient blend that was selected to minimise or eliminate the risk factors associated with brain ageing and dementia.

背景与目标： : 认知功能障碍综合征是影响老猫的主要疾病，是严重且不可逆转的脑细胞丧失和脑萎缩的后果。本研究的重点是以下假设: 促进成功的大脑衰老的最佳策略是针对与大脑衰老和痴呆症相关的危险因素。我们使用了一种营养策略，包括补充营养素 (抗氧化剂，精氨酸，b族维生素和鱼油)，以检验这一假设。根据先前的认知经验和基线认知测试的表现，将5·5至8·7岁的中年和老年猫分配到认知上等效的对照组或治疗组。治疗组中的猫维持在补充营养混合物的饮食中，而对照组中的猫维持在相同的基础饮食中，而无需额外补充。在最初的冲洗期后，所有猫都接受了一系列认知测试协议的测试。喂养测试饮食的猫在四个测试协议中的三个协议中表现出明显更好的性能: 评估以自我为中心的学习的协议，评估歧视和逆转学习的协议以及专注于获取空间记忆任务的协议。结果支持以下假设: 可以通过选择营养混合物来改善中老年猫的脑功能，以最大程度地减少或消除与脑衰老和痴呆症相关的危险因素。

BACKGROUND & AIMS: :The use of fillers for nonsurgical rhinoplasty has advanced in both materials and methods, and continues to gain popularity in North America. This technique is most often used for secondary revisions, although reports of fillers used in primary rhinoplasty in selected patients have been recently described. The present report details the use of a hyaluronic acid dermal filler in a young Middle Eastern man for a post-traumatic crooked nose deformity. Primary correction of the patient's right-sided nasal bone deviation using hyaluronic acid as a soft tissue filler was achieved with excellent results and patient satisfaction. The current use of fillers in nasal contouring is reviewed.

背景与目标： : 在非手术鼻整形术中使用填充物在材料和方法上都取得了进步，并在北美继续受到欢迎。尽管最近已经描述了在选定患者的初次鼻整形术中使用填充物的报道，但该技术最常用于二次修订。本报告详细介绍了一名中东年轻人在创伤后弯曲鼻子畸形中使用透明质酸皮肤填充剂的情况。使用透明质酸作为软组织填充剂对患者的右侧鼻骨偏斜进行了初步矫正，效果极佳，患者满意。回顾了填充剂在鼻腔轮廓中的当前使用。

BACKGROUND & AIMS: :It was recently suggested that cortisol levels in fingernails reflect cumulative hormone exposure over a relatively long period. This exploratory study cross-sectionally investigated the relationships between fingernail cortisol level and psychosocial stress in a sample of middle-aged workers (94 men and 29 women). The participants were asked to grow their fingernails for ∼2 weeks and then provide fingernail samples from every digit by using nail clippers. Further, they completed questionnaires for assessment of exposure to psychosocial stress in the past (stressful life events in the workplace in the previous year; e.g. change to a different line of work) and in the present (job stress and perceived stress). Results of a regression analysis adjusting for the effects of demographic variables showed that experience of stressful life events, but not job stress and perceived stress, was associated with elevated fingernail cortisol level. These findings indicate the potential of fingernail samples to retrospectively reflect individual differences in cortisol levels related to past psychosocial stress.

背景与目标： : 最近有人提出，指甲中的皮质醇水平反映了相对较长时间内累积的激素暴露。这项探索性研究从横截面上调查了中年工人 (94名男性和29名女性) 样本中指甲皮质醇水平与心理社会压力之间的关系。参与者被要求种植指甲约2周，然后使用指甲钳从每个数字中提供指甲样本。此外，他们完成了调查问卷，以评估过去 (上一年工作场所的压力生活事件; 例如改变工作方式) 和现在 (工作压力和感知压力) 的风险。调整人口统计学变量影响的回归分析结果表明，生活压力事件的经历，而不是工作压力和感知压力，与指甲皮质醇水平升高有关。这些发现表明，指甲样本有可能回顾性地反映与过去的心理社会压力有关的皮质醇水平的个体差异。

BACKGROUND & AIMS: One hundred and twelve forearms in 56 preserved cadavers were dissected to assess the incidence of Martin-Gruber connections in a population in South Africa. The connections were found in 13 cadavers (23%) and one was bilateral. There were no significant racial or sexual differences in the incidence. The course of Martin-Gruber connections and their anatomical relationship with the ulnar artery are illustrated.

背景与目标： 解剖了56具保存尸体中的112只前臂，以评估南非人口中Martin-Gruber连接的发生率。在13具尸体 (23%) 中发现了连接，其中1具是双侧的。发病率没有明显的种族或性别差异。说明了Martin-Gruber连接的过程及其与尺动脉的解剖关系。

BACKGROUND & AIMS: :A case with brain metastasis involving bilateral middle cerebellar peduncles (bMCP) was reported. A 71-year-old male with gastric cancer was treated for multiple brain metastasis by gamma knife radiosurgery (GKR) in September, 2004. Two months after the initial GKR, MRI showed asymmetrical enhanced lesions involving bMCP. A few months later, MRI revealed an expansional infiltration of bMCP lesions. The patient had presented with headache loss of appetite, cerebellar ataxia, diplopia and slight dysmetria. PET showed 2-deoxy-2- [18F] fluoro-D-glucose (FDG) uptake of the bMCP lesions. The lesions were diagnosed as brain metastasis of gastric cancer. The patient underwent his second GKR (marginal dose : 19Gy, maximum dose 38Gy) MRI revealed the disappearance of the tumors 3 months after the second GKR. One year later, the patient showed no evidence of recurrence. For the last time, our case was diagnosed as brain metastasis from gastric cancer without meningeal carcinomatosis. It was suggested that FDG-PET can provide additional information about the lesion of bMCP. GKR may be useful to treat the tumor in bMCP.

背景与目标： : 报告一例涉及双侧小脑中段 (bMCP) 的脑转移。2004年9月，一名71岁的胃癌男性接受了伽玛刀放射外科 (GKR) 治疗多发性脑转移。初始GKR后两个月，MRI显示涉及bMCP的不对称增强病变。几个月后，MRI显示bMCP病变的扩大浸润。患者出现头痛、食欲不振、小脑共济失调、复视和轻度失调。PET显示bMCP病变的2-脱氧-2- [18F] 氟-D-葡萄糖 (FDG) 摄取。病变诊断为胃癌脑转移。患者接受了第二次GKR (边缘剂量: 19Gy，最大剂量38Gy) MRI检查，发现第二次GKR后3个月肿瘤消失。一年后，患者没有复发的迹象。最后一次，我们的病例被诊断为胃癌脑转移，没有脑膜癌。建议fdg-pet可以提供有关bMCP病变的其他信息。GKR可能对治疗bMCP中的肿瘤有用。

BACKGROUND & AIMS: :The effect of body mass index (BMI) and obesity on apolipoprotein (apo) A-I levels and kinetics was examined by gender. Apo A-I kinetics were determined with a primed, constant infusion of deuterated leucine in the fed state in 19 men and 13 postmenopausal women. Compared with nonobese men, nonobese women had a higher level of high-density lipoprotein cholesterol (HDL-C) and apo A-I due to a 48% higher apo A-I production rate (PR) (P = .05). Obesity had no significant effects on apo A-I kinetics in women. In contrast, compared with nonobese men, obese men had a 9% lower apo A-I level due to a 64% higher fractional catabolic rate (FCR) partially offset by a 47% higher PR. Obese women had a 52% higher HDL-C than obese men (50 vs 33 mg/dL, respectively; P = .012), a finding related to the faster apo A-I FCR in obese men. BMI was directly correlated with apo A-I FCR (r = 0.84, P < .001) and PR (r = 0.79, P < .001) in men but not in women. Sixty-two percent of the variability in PR and 71% of the variability in FCR were due to BMI in men and only 3% and 23%, respectively, in women. In conclusion, BMI has a significant effect on apo A-I PR and FCR in men but not in women.

背景与目标： : 通过性别检查了体重指数 (BMI) 和肥胖对载脂蛋白 (apo) A-I水平和动力学的影响。在19名男性和13名绝经后女性中，通过在进食状态下持续不断地输注氘代亮氨酸来确定Apo A-I动力学。与非肥胖男性相比，非肥胖女性的高密度脂蛋白胆固醇 (hdl-c) 和apo a-I水平较高，原因是apo A-I的生产率 (PR) 48% 较高 (P = .05)。肥胖对女性的apo A-I动力学没有显着影响。相反，与非肥胖男性相比，肥胖男性的apo a-I水平9% 较低，这是由于64% 较高的分解代谢率 (FCR) 部分被47% 较高的PR抵消。肥胖女性的hdl-c比肥胖男性高52% (分别为50 vs 33 mg/dL; P = .012)，这一发现与肥胖男性的apo a-I FCR更快有关。BMI与男性的apo A-I FCR (r = 0.84，P <.001) 和PR (r = 0.79，P <.001) 直接相关，而女性则不相关。PR变异性的60 2% 和FCR变异性的71% 是由于男性的BMI，而女性分别只有3% 和23%。总之，BMI对男性的apo a-I PR和FCR有显着影响，而女性则没有。

BACKGROUND & AIMS: :Chromosome inversions suppress genetic recombination and establish co-adapted gene complexes, or supergenes. The 2La inversion is a widespread polymorphism in the Anopheles gambiae species complex, the major African mosquito vectors of human malaria. Here we show that alleles of the 2La inversion are associated with natural malaria infection levels in wild-captured vectors from West and East Africa. Mosquitoes carrying the more-susceptible allele (2L+a) are also behaviorally less likely to be found inside houses. Vector control tools that target indoor-resting mosquitoes, such as bednets and insecticides, are currently the cornerstone of malaria control in Africa. Populations with high levels of the 2L+a allele may form reservoirs of persistent outdoor malaria transmission requiring novel measures for surveillance and control. The 2La inversion is a major and previously unappreciated component of the natural malaria transmission system in Africa, influencing both malaria susceptibility and vector behavior.

背景与目标： : 染色体倒位抑制遗传重组并建立共同适应的基因复合物或超基因。2La反转是冈比亚按蚊物种复合体 (人类疟疾的主要非洲蚊子媒介) 中广泛存在的多态性。在这里，我们显示2La反转的等位基因与来自西非和东非的野生捕获载体中的自然疟疾感染水平有关。携带更敏感的等位基因 (2L a) 的蚊子在行为上也不太可能在房屋内被发现。针对室内静止蚊子的病媒控制工具，如蚊帐和杀虫剂，目前是非洲疟疾控制的基石。2L a等位基因水平高的人群可能会形成持续的室外疟疾传播库，需要采取新的监测和控制措施。2La倒置是非洲自然疟疾传播系统的主要且以前未被重视的组成部分，影响疟疾的易感性和媒介行为。

BACKGROUND & AIMS: :Middle East and North Africa (MENA) encompass very unique populations, with a rich history and encompasses characteristic ethnic, linguistic and genetic diversity. The genetic diversity of MENA region has been largely unknown. The recent availability of whole-exome and whole-genome sequences from the region has made it possible to collect population-specific allele frequencies. The integration of data sets from this region would provide insights into the landscape of genetic variants in this region. We integrated genetic variants from multiple data sets systematically, available from this region to create a compendium of over 26 million genetic variations. The variants were systematically annotated and their allele frequencies in the data sets were computed and available as a web interface which enables quick query. As a proof of principle for application of the compendium for genetic epidemiology, we analyzed the allele frequencies for variants in transglutaminase 1 (TGM1) gene, associated with autosomal recessive lamellar ichthyosis. Our analysis revealed that the carrier frequency of selected variants differed widely with significant interethnic differences. To the best of our knowledge, al mena is the first and most comprehensive repertoire of genetic variations from the Arab, Middle Eastern and North African region. We hope al mena would accelerate Precision Medicine in the region.

背景与目标： : 中东和北非 (MENA) 涵盖了非常独特的人口，具有丰富的历史，并包含了独特的种族，语言和遗传多样性。MENA地区的遗传多样性在很大程度上是未知的。该地区最近获得的全外显子组和全基因组序列使收集特定人群的等位基因频率成为可能。来自该地区的数据集的整合将提供对该地区遗传变异景观的见解。我们系统地整合了来自该地区的多个数据集的遗传变异，以创建超过2600万个遗传变异的汇编。对变体进行了系统注释，并计算了它们在数据集中的等位基因频率，并可以作为web界面使用，从而可以快速查询。作为遗传流行病学学纲要应用原理的证明，我们分析了转谷氨酰胺酶1 (TGM1) 基因变异的等位基因频率，与常染色体隐性层状鱼鳞病有关。我们的分析表明，所选变体的载波频率差异很大，种族间差异很大。据我们所知，al mena是来自阿拉伯，中东和北非地区的第一个也是最全面的遗传变异库。我们希望al mena能够加快该地区的精准医学。

BACKGROUND & AIMS: AIM:To evaluate the immunohistochemical and molecular presentation of protein p27 in cholesteatoma. METHODS:42 cholesteatoma samples and 6 external ear canal skin (EECS) specimens were investigated and analyzed taking into consideration congenital, acquired, recurrent cholesteatoma, and EECS. RESULTS:The expression of p27 was found in 16 (38.1%) out of 42 specimens of cholesteatoma and in 5 (83.3%) out of 6 specimens of EECS. There was a significant difference in p27-positive staining rate between EECS and cholesteatoma epithelium (p < 0.008). The presence of p27 was detected in 10 cases of acquired cholesteatoma, 2 cases of congenital and 3 cases of recurrent cholesteatoma. There was no significant difference between the presence of p27 in cholesteatoma and EECS (p = 0.01). CONCLUSION:The down-regulation of p27 is a key player in cell cycle control and plays an undefined role in the pathogenesis of all types of cholesteatoma.

背景与目标：