慢性根尖周炎319颗患牙的治疗与分析

目的：通过对319颗慢性根尖周炎患牙，采取根管超充填的方法进行治疗，观察疗效。方法：对根尖密度影较大的患牙，采用比塔派克斯根管充填剂超充;根尖密度影较小的患牙采用氧化锌碘仿丁香油糊剂稍超充填。结果：治疗的319颗患牙，有效311颗，总有效率达90％以上。结论：对慢性根尖周炎采取超充填治疗的方法是可行的，可以缩短疗程，促进患牙愈合。     

长期培养的大鼠原代肝细胞功能和形态学观察

目的：研究大鼠原代肝细胞长期体外培养后功能和形态的变化。 方法： 采用两步胶原酶原位灌流法分离大鼠肝细胞，并用Percoll分离液进行密度梯度离心进一步纯化肝细胞，采用0.4%台盼蓝染色观察细胞活力。然后将细胞接种于HepatoZYME-SFM培养基中培养，定期收集肝细胞培养液上清检测丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶（AST）、白蛋白、尿素氮的水平。采用乙氧基试卤灵O-脱乙基酶活性（EROD）方法检测肝细胞P450的CYPⅠA1功能。 结果： 新鲜分离的大鼠肝细胞总数（2-3）×108cells/whole liver，Percoll分离液纯化后活力和纯度在90%以上。HepatoZYME-SFM培养下肝细胞生长良好并保持正常形态。AST、ALT水平在培养3 d后下降显著，6-9 d后趋于相对稳定的低水平。白蛋白的分泌功能、尿素合成能力在18 d内维持在较高水平。可在3-6 d检测到CYPⅠA1酶活性。 结论： Percoll液纯化新分离肝细胞可提高其活率和纯度，HepatoZYME-SFM培养条件下肝细胞可有效保持良好形态结构和一定的生物合成代谢能力，适合肝细胞的体外长期培养和功能研究。     

钝性肝脾肾损伤的CT平扫与增强扫描比较

目的:比较CT平扫与增强扫描对肝脾肾钝性损伤的诊断能力。方法:回顾性分析临床疑似钝性肝脾肾损伤,并经手术和临床观察证实的CT平扫和增强扫描的患者84例。结果:平扫确定的损伤:肝12例,脾25例,肾5例;平扫可疑损伤:肝22例,脾15例,肾5例。增强确定的损伤:肝32例,脾40例,肾12例(全肾梗塞1例,局限性梗塞3例);对比剂外溢(活动性出血)3例;无可疑损伤。平扫无异常而增强确定有损伤:肝10例,脾5例,肾2例。增强显示的损伤灶比平扫范围明显大、病灶多、界限清楚。结论:CT增强扫描显示肝脾肾损伤明显优于平扫,延时扫描有助于发现活动性出血,应常规增强扫描。     

Turner氏综合征的临床与骨改变分析(附15例报告)

目的通过对15例有详细的临床及影像资料的Turner氏综合征分析,探讨先天性卵巢发育不良综合征(Turner)的临床与骨改变特点。方法收集15例Turner氏综合征临床及骨骼X线平片,分析其表现。结果染色体核型分3型,第1型45,X,8例;第2型46,XX,5例;第3型46,XX/45,X,2例。X线表现有:骨质稀疏14例,掌骨征阳性8例,指骨优势9例,肘外翻10例,脊柱骨化不良5例,足趾趾节短9例,颅底凹陷11例。结论Turner氏综合征患者最终身高明显低于正常人群,智力低下,性发育不全。X线表现典型,骨改变对临床的诊断具有主要参考价值。     

放射线联合p53基因及内皮抑素治疗小鼠前列腺癌皮下移植瘤

Objective To test the hypothesis that p53 gene therapy combined with endostatin can enhance tumor response to radiation therapy of RM-1 mouse xenograft prostate cancer and to investigate its mechanism. Methods A mouse prostate cancer model was established. Then mice with xenograft tumor were randomly divided into group A (control), B (radiation), C (radiation and rAdp53), D (radiation and rh-endostatin) and E (radiation and rAdp53 and rh-endostatin). On day 1, rAdp53 was injected intra-tumorously with 1 × 1010 vp per animal to group C and E. From day 1 to 14, rh-endostatin was given 15 mg/kg intraperitoneally daily to group D and E. On day 4 single fraction of 15 Gy was given to tumors in groups B, C, D and E. Normal saline was injected intra-tumorously or intraperitoneaUy accordingly as control. No treatment was done to group A. Tumor volume was measured daily. Samples were collected on Days 5, 10 and 15. Ki67, CD31, p53 and VEGF were detected by means of immunohistochemistry. Results (1) Radiation alone, radiation combined with intra-tumorous injection of Adp53 and/or intraperitoneal injection of rh-endostatin resulted in tumor growth arrest of RM-1 cells in vivo (P = 0.000). Radiation combined with both rAdp53 and rh-endostatin was the most effective treatment (P < 0.05). (2) All the four treatment groups had a decreased expression of mutant type P53 (P = 0.000). The expression of Ki67 in groups B and C were equal (P 0.05) and increasing (P = 0.000), respectively. Group D had a up-down-up curve (P < 0.05), but group E had a up-down one. On day 5 the expresion of VEGF in group E was the lowest (P < 0.05). An increased expression of MVD compared with the control was shown, and MVD in groups C, D and E were always higher than that in the control (P < 0.05). Conclusions The limitation of radiotherapy could be overcome by combination with beth p53 gene therapy and endostatin on the growth of mouse prostate cancer cell. Radiation, rAdp53 and endostatin have their own role but they can be interacted with each other.     

导尿前经尿道注入液体石蜡预防男性尿道损伤

目的 防止男性导尿患者尿道损伤。方法 按时间顺序将120例男性导尿患者均分为对照组和观察组．观察组导尿前润滑导尿管并向尿道注入无菌液体石蜡5ml，对照组采用传统方法润滑导尿管。结果 观察组一次插管成功率为100．0％．尿道粘腱损伤发生率为1．7％，患者出现中重度不适反应8例（13．3％）．与对照组尿道粘膜损伤发生率及中重度不适反应发生率比较，差异有显著性意义（均P〈0．01）。结论 导尿前尿道注入液体石蜡可以预防男性尿道损伤厦插管所致的不适。     

血竭粉外敷治疗压疮患者的效果观察

目的 探讨中药血竭粉外敷治疗压疮的效果。方法 将45例压疮住院患者随机分为观察组25例（45处）和对照组20例（30处）。对照组用75％乙醇消毒创面后以无菌康复新纱布包扎，同时加用庆大霉素浸湿纱布外敷；观察组在常规消毒、清创的基础上，采用血竭粉与75％乙醇纱布湿敷。结果 观察组有效率显著高于对照组，治愈时间显著短于对照组（均P〈0．01）。结论 血竭粉与75％乙醇纱布湿敷治疗压疮，操作方法简单、实用，效果安全可靠。     

苦碟子注射液治疗突发性聋疗效的观察

目的:探讨苦碟子注射液治疗突发性聋的效果。方法:随机将120例患者分为两组,治疗组60例,予以苦碟子注射液治疗;对照组60例,予以低分子右旋糖酐联合复方丹参注射液治疗。结果:治疗组治疗耳聋、耳鸣总有效率分别为88.33%、82.86%,对照组分别为68.33%、62.50%,治疗组耳聋、耳鸣总有效率均明显高于对照组(P<0.05)。结论:苦碟子注射液治疗突发性聋疗效好且安全可靠,无明显不良反应。     

RNA干扰基因敲除MAGE-1在恶性胶质瘤U87细胞中的初步研究

目的：通过构建抑制MAGE-1的短片段双链核糖核酸（siRNA）表达载体，鉴定其在人恶性胶质瘤细胞系U87细胞中对MAGE．1基因表达的干涉作用。方法：化学合成2对编码短发夹RNA序列的靶向MAGE—1基因寡核苷酸链，克隆至经BglⅡ、HindⅢ双酶切的pSUPER载体上，重组构建核糖核酸干扰（RNAi）质粒载体。利用RT-PCR、流式细胞术和荧光显微镜，检测经稳定转染后胶质瘤U87细胞中MAGE-1的表达，以了解siRNA的干涉效果。结果：重组构建的pSUPER—MAGE—1载体经双酶切、电泳及插入基因片段序列分析，表明寡核苷酸链成功地插入至预计位点，且序列与预期完全一致。稳定转染后G418筛选出的U87多克隆细胞MAGE-1的表达经RT—PCR、流式细胞术和荧光显微镜检测，2对siRNA均有较明显的干扰作用。结论：载体的成功构建并能对U87细胞中的MAGE—1分子进行RNAi，为进一步研究MAGE—1在肿瘤中的作用，分析基因功能，展开肿瘤基因治疗奠定了基础。