塞来昔布对鼻咽癌CNE-2细胞增殖抑制的实验研究

目的 研究环氧化酶-2抑制剂塞来昔布对鼻咽癌细胞CNE-2增殖的影响。方法 采用MTT法测定细胞代谢率,以流式细胞术观察细胞DNA含量和凋亡的变化情况,免疫组化SP法检测COX-2的表达情况。结果 塞来昔布对CNE-2细胞有明显的增殖抑制作用,呈时间和剂量依赖性。细胞周期各时相DNA 含量改变明显,G₀～G₁期细胞显著升高 (由最初47.03%升至最高79.20%),而S、G₂～_M期细胞明显下降;凋亡率显著增高。塞来昔布明显下调细胞中COX-2蛋白的表达。结论 塞来昔布对鼻咽癌CNE-2 细胞有明显的增殖抑制作用,并且呈时间和剂量依赖性,使细胞聚集在G₀/G₁期,其机制涉及COX-2依赖性途径。     

大鼠心肌缺血预适应对心肌缺血-再灌注损伤的保护作用及ATP敏感钾通道的作用

目的本研究旨在确定在完整大鼠模型中,心肌缺血预适应是否具有心肌保护作用,且这种保护作用是否由KATP通道介导。方法将48只大鼠随机分为4组：对照组、IPC组、优降糖十IPC组和优降糖组。所有动物均接受30min缺血／2h再灌注。预适应方案由3次5min缺血／5min再灌注组成。梗塞大小由硝基四唑氮蓝染色判定,并以坏死区占危险区的百分率表示。结果IPC几乎完全抑制了缺血/再灌注所致的室性心律失常的发生,但这种保护作用不能被KATP通道阻滞剂优降糖所阻断。IPC也能显著缩小缺血/再灌注后的心肌梗塞范围,且这种作用能被优降糖完全取消。结论IPC的心肌保护作用是由KATP介导的。     

特发性乳糜性心包积液一例

1　临床资料　　患者男性 ,32岁。咳嗽、胸闷、气促 8个月。不发烧 ,红细胞沉降率正常。胸部计算机断层摄影术及超声心动图提示 :两下肺片状阴影及心包积液 :心包液性暗区 5 .4cm。心包穿刺为乳糜液。使用链霉素 异烟肼 利福平、林可霉素 2个月 ,咳嗽消失 ,仍有胸闷、气促 ,继续抗结核治疗 4个月无效。体检 :体温36 .2℃ ,脉搏 84次 /分。颈静脉无充盈。两肺呼吸音清 ,无音。心界向两侧扩大 ,心音低钝。双下肢无水肿。实验室检查 :三大常规、抗链球菌溶血素“O”、血脂均正常。类风湿因子、抗结核抗体均阴性。超声心动图提示心包液性暗…     

放置指引钢丝对分支血管开口处保护的临床观察

目的:研究分叉病变放置指引钢丝对分支血管开口处保护的安全性及有效性。方法:冠状动脉分叉病变26例,分为治疗组17例,对照组9例。治疗组采用分支血管放置指引钢丝保护分支血管开口,对照组采用双支架技术或球囊扩张分支血管开口,复查冠脉造影观察分支血管开口狭窄改变及血流情况,随访疗效和主要心脏事件发生率。结果:经皮冠状脉成形术(PCI)术后治疗组与对照组相比,治疗组较对照组开口狭窄减轻不明显,治疗组术前、术后TIMI血流无明显差别,随访12±6个月,Q波心肌梗死及心绞痛发生率并不高于对照组。结论:分叉病变主支放置支架时放置指引钢丝对分支血管开口处保护是一种简单和有效的处理方法。     

降钙素基因相关肽预适应对在体大鼠心肌缺血/再灌注损伤的保护作用

为探讨降钙素基因相关肽预适应对在体大鼠心肌缺血／再灌注损伤模型是否具有保护作用，用３６只ＳＤ大鼠随机分为三组：对照组、缺血预适应组和降钙素基因相关肽组。后组持续缺血前２０ｍｉｎ静脉注射降钙素基因相关肽（１０μｇ／ｋｇ）。所有动物均接受３０ｍｉｎ缺血／２ｈ再灌注。预适应方案由３次５ｍｉｎ缺血／再灌注组成。梗塞大小由硝基四唑氮兰染色判定，并以坏死区占危险区的百分数表示。结果发现，缺血预适应和降钙素基因     

高强度聚焦超声治疗子宫肌瘤18例的疗效观察

目的：探讨高强度聚焦超声（high intensity focused ultrasound，HIFU）治疗子宫肌瘤的有效性和安全性。方法：选择我院确诊的18例子宫肌瘤患者，通过HIFU治疗后观察比较治疗前后肌瘤回声、大小、血流及临床症状的改变。结果：子宫肌瘤内部回声增强，瘤体缩小，临床症状改善，无严重副作用。结论：HI-Fu治疗子宫肌瘤安全、有效，值得进一步研究、观察。     

HIFU合并化疗治疗腹盆腔复发或转移癌的临床观察

目的:探讨高能聚焦超声刀(Highintensityfocusedultrasound,HIFU)合并化疗治疗腹盆腔复发或转移癌的疗效及不良反应。方法:选取既往病史有过手术和/或放、化疗史,病理诊断明确的腹盆腔复发或转移癌68例,随机分为治疗组(36例)和对照组(32例),前者采用HIFU 化疗,后者单纯用化疗,均在完成2周期化疗后评价其有效率、临床受益反应,并至少随访1年。结果:治疗组完全缓解(CR)1例,部分缓解(PR)24例,总有效率69.4%(25/36),临床受益率(CBR)为83.3%(30/36),平均生存期为9.1±3.1个月;对照组CR0例,PR10例,总有效率31.3%(10/32),CBR为56.3%(18/32),平均生存期为6.8±2.4个月;两组比较有显著性意义(P<0.01、P<0.05、P<0.01),主要不良反应为骨髓抑制和消化道反应,两组间比较无统计学差异,治疗组无脏器穿孔、大出血、胰漏、腹膜炎等并发症发生。结论:HIFU合并化疗治疗腹盆腔复发或转移癌可取得较高的局控率和临床受益率,并能延长其生存期,对于无手术和(或)放疗适应症的晚期腹盆腔恶性肿瘤不失为一种安全、有效的高姑息治疗手段。     

塞来昔布对人鼻咽癌CNE-2细胞生长抑制及放射增敏研究

Objective To investigate the growth inhibition and radiosensitization of Celecoxib in hu-man nasopharyngeal carcinoma cell line CNE-2. Methods CNE-2 growth inhibition by Celecoxib was eval-uated by MTT method. Apoptosis-related changes in morphology were observed by transmission electron mi-croscopy (TEM). Cell cycle distribution and apoptosis rate were measured by flowcytometry (FCM). The ex-pression of COX-2 protein was observed by SP method after the treatment of Celecoxib. Cells were randomly planted into four groups: irradiation control(Ci), drug group(Cd), irradiation group(R), and Celecoxib plus irradiation group(D+R). Single irradiation of 2,4,6,8,and 10 Gy were administered for colonogenic assay. Cell cycle distribution and apoptosis rate were analyzed at 6 Gy irradiation. Results The growth of CNE-2 cell was inhibited by celecoxib in a dose-and time-dependent manner, the IC50 was 80 μmol/L After the treatment, cell ratio of GO and G, phases was increased (47.03±2.76 vs 56.17±1.95, t=4.68, P= 0.010), whereas the ratio of S and G2/M phases was decreased (33.07±1.86 vs 24.87±1.76, t=5.54, P = 0.010; 19.30±0.53: 17.73±0.83, t=2.75, P=0.050), and the apoptosis rate was increased (1.57±0.47:10.47±0.31, t = 27.39, P = 0.000) in a dose-dependent manner. Apoptosis with nuclear chromatin condensation, fragmentation and cell shrinkage was found by TEM. SP method showed that Celeib decreased COX-2 expression (17.48±0.34 vs 12.82±0.51,t=13.20,P =0.00). The sensitivity ratio(D0) was 1.15. FCM showed that the percentage of cells in G2/M phase was significanty more in R and D+R groups than in Ci and Cd groups (68.00±1.65,54.27±5.74,17.60±0.80,14.86±1.23, t=47.70,P=0.000; t=11.63, P=0.000), and also significantly different between R group and D + R group (t=3.99, P= 0.020). The apoptosis rate was higher in R and D + R groups than Ci and Cd groups(4.83±0.97,9.50± 1.35,1.33±0.86 and 2.28±0.42,t=4.67,P=0.010;t=8.81, P=0.000), D + R group than R group(t =4.85,P=0.010). Conclusions Celecoxib can markedly inhibit the growth and induce apoptosis in CNE-2 cells,which may depend on COX-2 pathway. Celeeoxib potently enhances the radiosensitivity of CNE-2 cells,which may due to the repair inhibit of radiation-induced DNA damage, inhibit of cell proliferation,and enhancement of cell apoptosis after irradiation.     

塞来昔布对人鼻咽癌CNE-2细胞生长抑制及放射增敏研究

Objective To investigate the growth inhibition and radiosensitization of Celecoxib in hu-man nasopharyngeal carcinoma cell line CNE-2. Methods CNE-2 growth inhibition by Celecoxib was eval-uated by MTT method. Apoptosis-related changes in morphology were observed by transmission electron mi-croscopy (TEM). Cell cycle distribution and apoptosis rate were measured by flowcytometry (FCM). The ex-pression of COX-2 protein was observed by SP method after the treatment of Celecoxib. Cells were randomly planted into four groups: irradiation control(Ci), drug group(Cd), irradiation group(R), and Celecoxib plus irradiation group(D+R). Single irradiation of 2,4,6,8,and 10 Gy were administered for colonogenic assay. Cell cycle distribution and apoptosis rate were analyzed at 6 Gy irradiation. Results The growth of CNE-2 cell was inhibited by celecoxib in a dose-and time-dependent manner, the IC50 was 80 μmol/L After the treatment, cell ratio of GO and G, phases was increased (47.03±2.76 vs 56.17±1.95, t=4.68, P= 0.010), whereas the ratio of S and G2/M phases was decreased (33.07±1.86 vs 24.87±1.76, t=5.54, P = 0.010; 19.30±0.53: 17.73±0.83, t=2.75, P=0.050), and the apoptosis rate was increased (1.57±0.47:10.47±0.31, t = 27.39, P = 0.000) in a dose-dependent manner. Apoptosis with nuclear chromatin condensation, fragmentation and cell shrinkage was found by TEM. SP method showed that Celeib decreased COX-2 expression (17.48±0.34 vs 12.82±0.51,t=13.20,P =0.00). The sensitivity ratio(D0) was 1.15. FCM showed that the percentage of cells in G2/M phase was significanty more in R and D+R groups than in Ci and Cd groups (68.00±1.65,54.27±5.74,17.60±0.80,14.86±1.23, t=47.70,P=0.000; t=11.63, P=0.000), and also significantly different between R group and D + R group (t=3.99, P= 0.020). The apoptosis rate was higher in R and D + R groups than Ci and Cd groups(4.83±0.97,9.50± 1.35,1.33±0.86 and 2.28±0.42,t=4.67,P=0.010;t=8.81, P=0.000), D + R group than R group(t =4.85,P=0.010). Conclusions Celecoxib can markedly inhibit the growth and induce apoptosis in CNE-2 cells,which may depend on COX-2 pathway. Celeeoxib potently enhances the radiosensitivity of CNE-2 cells,which may due to the repair inhibit of radiation-induced DNA damage, inhibit of cell proliferation,and enhancement of cell apoptosis after irradiation.