FasL基因表达对缺氧状态下直肠癌细胞增殖凋亡的影响

Objective To elucidate the effect of FasL gene expression on the proliferation and apoptosis of hypoxic rectal carcinoma cells. Methods The normoxic expression level of FasL in HR-8348 subtype cells (HR-8348B, HR-8348L, HR-8348F and HR-8348As) with different invasive power were verified by Western blot. Hypoxia models for HR-8348B, HR-8348L, HR-8348F and HR-8348As were constructed with chemical modeling, then the FasL levels in all groups at 12 h after hypoxia were quantitated by Western blot. Distribution of different cell life cycles was determined with flow cytometry. Cell reproductive activities were detected with MTT method, and cell apoptesis was assessed with TUNEL. Results FasL protein was pigmentized at the position of 40 000 by Western blot, and the expression level of FasL was significantly higher in HR-8348F cells than those in HR-8348B, HR-8348L and HR-8348As cells(F=361.149, P<0.01) in normoxia. At 12 h after hypoxia, the FasL level was also significantly higher in HR-8348F cells than those in other groups (F=278.766, P<0.01), but was not markedly different as compared to themselves in normoxia (t=1.762, P>0.05). The proliferation index was significantly higher in HR-8348F (60.43±3.72) than those in HR-8348B (40.01±3.30), HR-8348L (41.30±4.06) and HR-8348As cells (35.87±4.39), respectively (F=39.477, P<0.01). However, both inhibition rate of proliferation and apoptotic index were remarkably lower in HR-8348F (17.30±1.98 and 13.10±1.04) than those in HR-834B (33.70±4.33 and 21.60±1.31), HR-8348L (34.20±3.92 and 20.10±1.15), and HR-8348As (38.00±4.55 and 23.90±1.23), respectively (F=28.811 and 76.462, respectively, P<0.01). Conclusion The expression enhancement of intracellular FasL in rectal carcinoma in hypoxia can lead to accelerated proliferation and reduced apeptosis of cells, which will promote tumor cells to adapt microenvironmental hypoxia.     

癌肉瘤——恶性菌苗勒管混合瘤

恶性苗勒管混合瘤，很少见，来自残留的胚胎细胞或间质细胞化生。肿瘤含肉瘤和癌两种成分，又称癌肉瘤。包含恶性上皮及恶性间质成分。占所有宫体恶性肿瘤的1％～6％，发病率为每年8．2／百万妇女。癌肉瘤进一步分为含有同源性或异源性间质来源者。同源成分包括内膜间质，平滑肌及纤维结缔组织。异源性成分包括那些原来不属于苗勒系统内的组只，如     

调控蛋白失调导致肿瘤细胞增殖 遏制“靶点”为癌症治疗提供新思路

中国科学院上海生命科学研究院营养科学研究所陈雁研究组完成的一项关于细胞外信号调节激酶（extracellular signal—regulated protein kinase，ERK）信号通路调控的最新研究成果，日前刊登在国际权威学术刊物《美国国学科学院院刊》上。专家认为，该研究为未来研究肿瘤细胞过度增生的分子机理，进而治疗癌症提供了新思路和新靶点。[第一段]     

重视防治口腔癌

口腔癌是人类常见的头颈部恶性肿瘤，主要包括舌癌、颊粘膜癌、牙龈癌、腭癌、口底癌、唇癌等，其中舌癌和颊粘膜癌最为多见。     

自发性乙状结肠穿孔8例报告

2002年1月至2005年1月我院共收治自发性乙状结肠穿孔患者8例，本组占同期外科住院病人的0．165％，男6例，女2例，年龄58～77岁，平均66岁；发病至就诊时间4～36h，平均12h；合并有乙状结肠癌、直肠癌各1例，有便秘史，反复下腹部按摩3月，排便后突发病1例，余无明显诱因。     

单一小切口带锁钉固定治疗"浮膝"损伤

[目的]探讨应用单一小切口治疗“浮膝”损伤的手术方法及手术适应证。[方法]对12例“浮膝”损伤病人采取C型臂X线机透视下闭合复位,膝关节屈曲30°~40°于髌韧带内侧缘做3~5 cm的切口,经股骨髁间窝逆行穿入股骨带锁钉;膝关节屈曲90°经同一切口向胫骨打入带锁钉。[结果]经过1~3年的随访,本组病人均骨性愈合,1例膝关节功能仅屈曲到90°,其它膝关节功能恢复到伤前水平。[结论]该术式创伤小,操作简单,固定牢固,能早期进行膝关节功能锻炼,早期对膝关节功能无影响,有无远期影响有待长期随访。     

苦味叶下珠木脂素对细胞毒性影响和对多药耐药性的逆转作用

苦味叶下珠水提取物可降低肿瘤细胞增殖以延长肝癌实验动物的寿命，且对多种恶性肿瘤如肉瘤、癌和淋巴瘤等具有潜在的对抗活性。本实验采用叶下珠己烷提取物、木脂素馏分和几种木脂素单体通过对人体的两种白血病K562细胞及其亚系抗长春新碱Lucena-1细胞活性的影响，研究了叶下珠木脂素对肿瘤细胞毒性影响、对P-糖蛋白（Pgp）活性抑制作用和对多药耐药性（MDR）的逆转作用。     

免疫"妥协"和骨髓增生异常综合征细胞克隆

骨髓增生异常综合征(MDS)是一类恶性造血干／祖细胞克隆性疾病，以无效造血和高风险进展为急性白血病为特征，WHO分类将其归入髓系肿瘤。在该病的发生、发展过程中，负有监视并清除恶性克隆功能的免疫系统也发生了异常改变，其突出特征是对恶性造血克隆无足量反应，妥协(compromise)以至耐受(tolerance)，以至MDS逐步向白血病转化。现对此方面研究进展综述如下。     

芬太尼复合丙泊酚或单纯丙泊酚麻醉用于门诊人工流产术

芬太尼具有镇痛作用强，对心血管影响小、作用时间短的优点。而丙泊酚具有起效快、镇静催眠作用强，静注后能迅速地进入麻醉状态，停药后苏醒迅速等优点，极其适用于门诊小手术的麻醉。我院用芬太尼复合丙泊酚或单纯丙泊酚麻醉，用于门诊人工流产术的麻醉效果观察。