左旋咪唑对MANA诱发大鼠食管癌前病变及免疫功能影响

目的本文旨在探讨左旋咪唑预防食管癌的作用及与免疫的关系。方法Ｗｉｓｔａｒ大鼠９０只,随机分为三组,分别给左旋咪唑、太洛龙（阳性对照）、生理盐水（阴性对照）,用甲基戊基亚硝胺ＭＡＮＡ诱发食管癌前病变,经１０５天实验后,检测食管癌前病变发生率,并测定免疫器官指数,外周血Ｔ淋巴细胞和自然杀伤细胞（ＮＫ细胞）。结果显示左旋咪唑降低食管癌前病变发生率的作用和太洛龙（Ｔｉｌ）相似,并使外周血Ｔ淋巴细胞和ＮＫ细胞明显增加。Ｔｉｌ组ＮＫ细胞无增加。结论左旋咪唑和太洛龙具有相似地预防亚硝胺诱发食管癌作用,并与增强机体免疫功能相关。     

水通道蛋白-9在肝脏的表达及其意义

水通道蛋白-9(aquaporin-9,AQP9)是一种在肝组织中表达的跨膜转运蛋白。肝组织细胞内AQP9定位于细 胞质膜。AQP9除可通透水,还可以通透甘油、尿素等其他多种小分子。大量研究证明AQP9参与肝组织多种生理和 病理过程。AQP9在肝脏上的表达对肝脏生理和病理过程有多种影响,肝脏AQP9的研究可为肝脏疾病的诊断和治疗 提供新的靶点。     

自体髓核移植接触神经根后大鼠诱发电位及神经显微结构的观察

目的:探索髓核移植接触神经根后对大鼠诱发电位及神经显微结构的影响。方法:20只SD大鼠随机分成2组,A组、B组分别取大鼠自体皮下筋膜脂肪及尾部的髓核组织,无压迫下放置在L4~5神经根周围。分别在术前、术后即刻、术后3天检测大鼠术侧诱发电位。3天时处死大鼠,进行神经根的病理切片观察。结果:A组大鼠感觉及运动诱发电位手术前后没有明显变化,B组诱发电位潜伏期延长。神经显微结构观察,A组少量炎性细胞浸润,B组神经外膜水肿、大量炎性细胞侵润,髓鞘水肿。结论:髓核接触神经根后可引起神经周围急性炎症病理改变,并引起神经传导功能的下降。     

年轻急性心梗患者临床特点

目的探讨年轻急性心肌梗死患者的心血管危险因素、临床特点和冠状动脉病变的特点。方法对确诊的43例年轻急性心梗患者和55例老年患者间的主要危险因素、临床特点、冠脉病变特点进行对比统计分析。结果 （1）年轻组患者以男性为主;多超重;吸烟史明显多于老年组;糖尿病、高血压病病史明显低。（2）年轻组高TG、CHOL血症发生率高,并且血TG、CHOL水平明显高于老年组。（3）年轻组以单支病变为主,老年组以多支病变为主。（4）年轻组多无心绞痛病史;老年组多有反复发作的心绞痛病史。结论 （1）吸烟和超重是年轻急性心梗的主要危险因素。（2）高脂血症也是重要危险因素。（3）病变相对简单以单支血管最多,三支病变较少。（4）年轻组多无心绞痛病史。     

Measurement of deoxyinosine adduct: Can it be a reliable tool to assess oxidative or nitrosative DNA damage?

Adenosine deaminases (ADA) are key enzymes that deaminate adenosine (A) or deoxyadenosine (dA) and produce inosine or deoxyinosine (dI), respectively. While ADA only deaminates free dA, reactive nitrogen species (RNS) or reactive oxygen species (ROS) deaminate adenine base on the DNA and leave dI, which is a pre-mutagenic lesion. Therefore, dI adduct in the genomic DNA has been considered a biomarker of DNA damage caused by RNS or by ROS.     

Future Directions in Research,Treatment and Prevention of HPV-Related Squamous Cell Carcinoma of the Head and Neck

Benign smooth muscle proliferations are relatively rare in the oral cavity. Most are classified as angioleiomyomas, some as hamartomatous growths and a few as cutaneous-type leiomyomas. We present two cases of benign smooth muscle proliferations in the tongue, provide a review, briefly discuss histogenesis and offer a clinico-pathological differential diagnosis.     

Sonography as a Tool for Identifying Engaging Hill‐Sachs Lesions

Engaging Hill‐Sachs lesions can be a factor predictive of recurrent anterior shoulder instability, yet no method has been recognized as an effective means to predict engagement. We evaluated the ability of sonography to identify engaging Hill‐Sachs lesions by using a transaxillary approach and dynamic scanning. In patients with engaging lesions, there was an abrupt change in the contour of the humeral head when the shoulder was in 90° of abduction and 90° of external rotation. Sonography therefore has the potential to be a useful preoperative tool in determining which patients may benefit from a surgical repair that also addresses Hill‐Sachs lesions.     

The effect of interferon beta-1b on size of short-lived enhancing lesions in patients with multiple sclerosis

Background: Contrast enhancing lesions (CELs) in MRI represent inflammatory events in multiple sclerosis (MS). IFN-β-1b decreases the formation of CELs. However, the ability of IFN-β-1b to reduce the size of CELs arising during therapy has not been extensively investigated. Methods: Thirty patients with relapsing-remitting (RR) MS were followed for a 3-month pre-therapy phase then for a 6-month therapy phase during which treatment with IFN-β-1b at a dosage of 250 μg subcutaneously injected every other day was employed. Each patient underwent monthly clinical and MRI examinations. For all patients, CELs were identified on postcontrast T1-weighted MRIs. CEL number, size, and volume were computed using Medx software. Results: The average number and total lesion volume of CELs visible during the therapy phase were significantly lower than the number and total lesion volume of CELs observed in the pre-therapy phase. However, there was no significant reduction between pre-therapy and therapy phases in the mean size of individual lesions arising during the respective phases. Conclusions: Since size of CELs has been related to severity of tissue damage, the lack of size decrease during therapy suggested a limited therapeutic effect of IFN-β-1b if a blood–brain barrier breakdown has occurred.