绿脓杆菌制剂对人肝癌MHCC97L细胞增殖和侵袭能力的影响

目的 探讨绿脓杆菌制剂(pseudomonas aeruginosa vaccine,PA)对有转移潜能的人肝癌MHCC97L细胞增殖和侵袭能力的影响.方法 采用不同浓度的PA分别作用于MHCC97L细胞,观察细胞增殖、生长曲线、克隆形成率、流式细胞术分析(FCM)、侵袭、运动、迁移、VEGF和MMP2蛋白表达(ELISA法).结果 PA明显抑制MHCC97L细胞增殖和克隆形成,呈良好的剂量-效应关系.PA 48 h和72 h的IC50分别为3.1×108/ml和1. 9×108/ml.PA浓度为0.5×108/ml、1×108/ml和2×108/ml时,其细胞倍增时间依次增加,克隆形成率依次降低(P均＜0.01);FCM显示,G1期细胞比例随PA浓度增加而增加,S+G2期细胞比例随PA浓度增加而降低(P均＜0.01).PA浓度为1×108/ml时,穿过人工基底膜(侵袭实验)和上室底膜(运动实验)的细胞数(分别为4.8±1.3和8.8±2.2)明显低于对照组(8.6±2.1和15.6±1.2)(P均＜0.01);细胞经72 h培养后,对照组划痕逐渐愈合,1×108/ml的PA组细胞划痕依然明显.ELISA法检测发现,1×108/ml的PA组其VEGF蛋白和MMP2蛋白含量和对照组相比均无明显差异(P均＞0.05).结论 在一定条件下,绿脓杆菌制剂可抑制人肝癌MHCC97L细胞增殖和克隆形成,其作用部分是通过使细胞周期阻滞在G1期实现的;绿脓杆菌制剂可以明显抑制MHCC97L细胞的侵袭、运动和迁移能力,其作用和VEGF、MMP2蛋白分泌关系不明显.     

加热联合吲哚美辛对人肝癌MHCC97L细胞增殖和侵袭能力的影响

目的 观察水浴加热联合吲哚美辛对人肝癌MHCC97L细胞增殖和侵袭能力的影响.方法 42℃水浴加热前2h加入0.2 mmol/L吲哚美辛,加热组不加药,对照组不加热、不加药,其他处理相同并在同一时间点观察.在不同的时间观察细胞增殖、生长曲线、克隆形成率、流式细胞术(FCM)分析细胞周期、侵袭、运动、血管内皮生长因子(VEGF)和基质金属蛋白酶(MMP)-2蛋白表达[酶联免疫吸附试验(ELISA)法].结果 与对照组比较,加热+吲哚美辛明显抑制MHCC97L细胞增殖(P＜0.01),其最大抑制效应为加热后48 h(53.6％),细胞倍增时间延长了2.07倍;加热+吲哚美辛组48、96 h的细胞集落形成率均明显降低(P ＜0.01);FCM显示,吲哚美辛能逆转加热对细胞周期的影响,加热+吲哚美辛组48 h和96 h的G1期细胞比例均明显升高,S+G2期细胞比例均明显降低(P＜0.05).加热+吲哚美辛组48 h和96 h相同数量的细胞穿过人工基底膜到达Transwell小室膜背面的细胞平均数(侵袭实验)和穿过Transwell小室膜到达背面的MHCC97L细胞平均数(运动实验)均明显低于加热组(P＜0.01);ELISA法检测发现,加热+吲哚美辛组48、96 h的分泌量均明显低于加热组(P＜0.05).结论 吲哚美辛抑制体外加热后肝癌细胞的增殖,其作用和抑制细胞进入DNA合成期和分裂期有关;进一步抑制其侵袭运动能力,其作用和MMP-2、VEGF表达降低有关.     

加热对人肝癌MHCC97L细胞增殖和侵袭能力的影响

我们通过建立低转移潜能人肝癌细胞株MHCC97L[1]观察水浴加热对肝癌细胞体外增殖、侵袭运动能力的影响.一、材料与方法MHCC97L细胞培养瓶或培养板密封后浸没于42℃恒温水浴箱内加热,30min×2,间隔10min.     

一份疑难心电图──阵发性预激综合征伴融合波

一份疑难心电图──阵发性预激综合征伴融合波山东省济宁市中医院周建炜山东省济宁市第一人民医院李兴杰１临床资料患者男性，３９岁，因胸部闷痛伴心悸４月来诊。既往无心动过速史。体检：ＢＰ１７／１２ｋＰａ（１２６／９０ｍｍＨｇ），心律整，未闻及杂音。除心电图异...     

主动脉弓下缘高位支气管动脉瘤诊治1例

支气管动脉瘤（bronchial artery aneurysm,BAA）在外周血管动脉瘤中较为罕见,目前国内外尚无多中心流行病学统计数据,大多为个案报道,发病于主动脉弓下的高位BAA目前尚无报道。本研究报道1例绍兴市人民医院收治的反复咳嗽、咳痰、咯血的患者,入院后支气管动脉CT血管成像提示：主动脉弓下缘见长径约7mm动脉瘤。后完善相关检查后行支气管动脉栓塞术,术程顺利,术后患者咯血停止。出院1年余随访,咯血症状消失。     

房早揭示右束支内双径路传导一例

房性早搏常伴室内差异传导(VAb),但VAb心搏呈反文氏现象实属少见。我们遇到1例报告如下: 女性,72岁,临床诊断:肺心病。心电图示V_1导联奇数P为窦性,P—R间期0.12s,QRS波群呈rS型,时限0.08s。偶数P提前出现与窦性P不同,P’—R间期0.16s,联律间期基本恒定,P’下传QRS波群呈R逐渐降低→rSr’型,时限0.11→0.09s,这种心电图变化不能用     

伊立替康联合草酸铂、5-氟尿嘧啶、亚叶酸钙治疗晚期胃癌的临床疗效

目的:比较伊立替康联合奥沙利铂和5-氟尿嘧啶、亚叶酸钙(FOLFOXIRI)与奥沙利铂联合CF,5-FU(FOLFOX4)治疗进展期或转移性胃癌的疗效和毒副反应。方法:经病理确诊的进展期或转移性胃癌患者78人,随机分为两组,FOLFOXIRI组36人,FOLFOX6组42人。FOLFOX4方案:L-OHP 85 mg/m2,第1天静滴,CF 200 mg/m2,5-FU 400 mg/m2,静冲,5-FU 600mg/m2,第1,2天,持续静点22h。FOLFOXIRI方案用法:CPT-11 165 mg/m2,L-OHP,CF,5-FU用法同FOLFOX4。结果:FOL-FOXIRI方案与FOLFOX4方案一线治疗进展期或转移性胃癌的缓解率分别为53.07%和28.57%(P=0.028),中位生存期分别为11.8月和9.4月(P=0.321),中位疾病进展时间为6.0月和4.8月(P=0.036)。FOLFOXIRI方案的骨髓毒性和腹泻发生率高于FOLFOX4方案。结论:本研究结果显示FOLFOXIRI方案治疗胃癌近期缓解率高于FOLFOX4方案,不良反应可以耐受,值得更深入系统地进行临床研究。     

食管贲门双源癌患者癌组织中mdm2,CyclinD1和p16蛋白的表达

目的:探讨食管贲门双源癌组织中mdm2、CyclinD1和p16蛋白的表达.方法:采用免疫组化ABC法,对河南食管癌高发区30例双源癌患者食管鳞癌(SCC)和贲门腺癌(GCA)组织中mdm2、CyclinD1和p16蛋白的表达进行检测.结果:30例双源癌患者SCC组织中mdm2、CyclinD1和p16蛋白阳性率分别为57%(17/30)、45%(13/29)和24%(7/29),CCA组织中分别为73%(22/30)、33%(10/30)和17%(5/30),SCC和GCA组织中3种蛋白的阳性率差异均无统计学意义(P均＞0.05).SCC和GCA组织中mdm2、CyclinD1和p16蛋白表达的一致性差异无统计学意义(P均＞0.05).结论:食管和贲门双源癌存在较高的mdm2、CyclinD1和p16蛋白表达一致性改变,提示河南食管癌高发区食管贲门双源癌可能具有相似的发病因素和分子机制.     

绿脓杆菌制剂对人肝癌MHCC97L细胞增殖和侵袭能力的影响

Objective To investigate the effects of Pseudomonas aeruginosa vaccine (PA) on proliferation and invasiveness of the hepatocellular carcinoma cell line MHCC97L with metastatic potential. Methods Proliferation, growth curve, plate efficiency, flow cytometry, transwell invasion assay, cell motility assay, scarification test, vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP2) protein activity were evaluated after cells were treated with PA at various concentrations. Results PA can inhibit the proliferation and plate efficiency of MHCC97L cell markedly in a dose-dependent manner. The IC50 of cells treated with PA for 48 h and 72 h was 3.1 ×108/ml and 1.9 × 108/ml, respectively. The doubling time increased and plate efficiency decreased gradually when cells treated with 0.5 × 108/ml, 1 × 108/ml and 2 × 108/ml PA (P＜0.01). PA could induce cell cycle arrest at the G1 phase in a dose-dependent manner by flow cytometric analysis. The average amount of invading cell per field in cell invasion assay and motility assay were 4. 8 ± 1.3 and 8. 8±2.2 when cells treated with 1× 108/ml PA, which was significantly lower than that of control group (8. 6±2. 1 and 15. 6±1.2 ) (P＜0.01) Scarification test showed that the metastatic ability of cells treated with 1 × 108/ml PA significantly lower than that in the control group. Comparison between cells treated with 1 × 108/ml PA and control group, no remarkable difference was found regarding expression of VEGF and MMP2 in supernatant of cell culture. Conclusion PA can inhibit proliferation and plate efficiency of HCC cell line MHCC97L, which is in part mediated by the cell cycle arrest at the G1 phase. PA could inhibit invasiveness of HCC cell line MHCC97L, which is unrelated to the VEGF and MMP2 protein activity.     

消炎痛抑制肝细胞肝癌生长转移的研究

Objective To study the effects of indomethacin on proliferation and invasion of hepatocellular carcinoma (HCC) cell line MHCC97L with metastatic potential and the effect of indomethacin on the growth and metastasis of HCC. Methods (1) In vitro; Proliferation, Transwell invasion assay, cell motility assay, vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP-2) protein activity were evaluated after cells were treated with 0. 2 mmol/L indomethacin. (2)In vivo: Mice bearing xenografts in the liver were randomly divided into control and indomethacin groups. At the end of sixth week, the mice were killed and tumor volume, inhibitory rate, immunohistochemistry assay (IHA) and metastasis were evaluated. Results (1)In vitro; 0. 2 mmol/L indomethacin could inhibit the proliferation of MHCC97L cells markedly (P ＜0. 01). The average amount of invading cells per field in cell invasion assay and motility assay was 2. 2 ± 1. 3 and 4.4 ± 1. 1 respectively in indomethacin group, significantly less than in control group ( 11. 4 ± 1. 9 and 12. 8 ± 1. 8 respectively, P ＜0. 01). The expression of VEGF and MMP-2 in cells treated with indomethacin was significantly lower than in control group (P ＜0. 01). (2)In vivo; Tumor volume, incidence and number of lung metastases in control and indomethacin groups were (1700 ±422) mm3 and (1170 ± 585) mm3 (P ＜ 0. 05), 75% and 50% ( P ＞ 0.05), 2. 92 ± 2. 07 and 1.33 ±1.56 (P＜0. 05) , respectively. Inhibition rate in indomethacin group was 31.2%. IHA showed that the expression of VEGF, MMP-2, and cyclooxygenase-2 ( COX-2) was down-regulated in indomethacin group (P ＜0.01). Conclusion Indomethacin could inhibit the growth and metastasis of HCC, which was in part mediated by down-regulation of VEGF and MMP-2.