Preliminary study correlating CX3CL1/CX3CR1 expression with gastric carcinoma and gastric carcinoma perineural invasion

AIM:To study the relationship between the CX3CL1chemokine,its receptor CX3CR1,and gastric carcinoma/gastric carcinoma perineural invasion(PNI).METHODS:Thirty cases of gastric carcinoma were surgically resected(radical resection or palliative resection)between February 2012 and July 2012.Tumour and tumour-adjacent tissues were evaluated for the presence of CX3CL1(ELISA)and CX3CR1(immunohistochemistry and Western blotting)in an effort to analyse the relationship between CX3CL1/CX3CR1 and gastric carcinoma/gastric carcinoma PNI.RESULTS:Of these 30 cases,14 were PNI-positive(46.7%).No significant differences in CX3CL and CX3CR1 expression in tumour-adjacent tissues were found between the PNI positive and negative groups.Expression levels of CX3CL and CX3CR1 in tumour tissues were significantly higher than those in adjacent tissues(P<0.01),and were significantly higher in tumour tissues from the PNI-positive group compared to the PNI-negative group(P<0.01).CONCLUSION:CX3CL1/CX3CR1 expression may be associated with the occurrence and development of gastric carcinoma as well as gastric carcinoma PNI.     

Cardiovascular effect of [3,4-dihydro-8-(2-hydroxy-3-isopropylaminopropoxy)-3-nitrato-2H-1-benzopyran] (K 351)

Cardiovascular effect of a new compound, K 351, was examined in anesthetized dogs. Intravenous injections of 100 micrograms/Kg or over of K 351 caused a fall in systemic blood pressure, reduced peripheral vascular resistance, left ventricular enddiastolic pressure, max dP/dt and Vmax, and increased time constant T and PQ interval. Heart rate was reduced with 1 microgram/Kg K 351. The magnitudes of the changes in heart rate, T and PQ interval were not different between K 351 and propranolol groups, while those in max dP/dt and Vmax caused by K 351 were larger than those induced by the same doses of propranolol. It is suggested that K 351 suppressed left ventricular contractility, sinus node activity and atrioventricular conduction through its beta-receptor blocking action and reduced peripheral vascular resistance and left ventricular enddiastolic pressure through its vasodilating action.     

贲门癌组织环氧化酶-2和血管生成因子的表达及其与血管生成的关系

目的:探讨环氧化酶-2(COX-2)和血管生成因子(VEGF)在贲门癌组织中的表达及其与肿瘤血管生成的关系.方法:免疫组化法检测贲门癌手术切除标本46例和癌旁正常黏膜标本21例中COX-2,VEGF表达.采用抗CD34抗体标记微血管内皮细胞,计算微血管密度(MVD).分析COX-2,VEGF表达与MVD和贲门癌主要临床病理特征的相关性.结果:贲门癌组织COX-2,VEGF阳性表达率、MVD值显著高于癌旁正常黏膜的(80.4% vs 14.3%,x~2=26.22,P<0.01;76.1% vs 19.1%,x~2=19.28,P<0.01:31.95±3.87 vs 16.28±1.55,t=17.76,P<0.01).COX-2,VEGF表达、MVD值与肿瘤临床TNM分期和淋巴结转移密切相关,TNM分期中Ⅲ Ⅳ期的贲门癌组织中COX-2,VEGF表达率、MVD值显著高于Ⅰ Ⅱ期的(90.3% vs 60.0%,x~2=5.91,P<0.05;96.8% vs 46.7%,x~2=16.13,P<0.01;33.43±3.34 vs 28.90±3.08,t=4.42,P<0.01).伴有淋巴结转移的贲门癌组织中COX-2,VEGF表达率,MVD值显著高于无淋巴结转移的(94.1% vs 41.7%,x~2=15.51,P<0.01:91.2% vs 50.0%,x~2=9.56,P<0.01;33.53±3.21 vs 27.48±1.03,t=6.38,P<0.01).Spearman等级相关分析表明,COX-2,VEGF表达与MVD呈显著正相关(r= 0.823:r=0.892,P<0.01).结论:COX-2,VEGF异常表达及其诱导的血管生成在贲门癌的侵袭和淋巴结转移中起重要作用.     

Inhibition of the PI3K-Akt signaling pathway enhances the sensitivity of Fas-mediated apoptosis in human gastric carcinoma cell line,MKN-45

It is well known that Fas ligand and anti-Fas antibodies can induce apoptosis, although some cancer cells are resistant to their stimuli. On the other hand, phosphatidylinositol 3-kinase (PI3 K) and Akt mediate the survival signal and allow the cells to escape from apoptosis in various human cancers. Thus, we postulated that LY294002, a PI3 K inhibitor, should inactivate Akt, consequently inhibiting cell proliferation and increase apoptosis in the human gastric carcinoma cell line, MKN-45. Previously, we reported that MKN-45 was resistant against the anti-Fas antibody, CH-11, without interferon-gamma pretreatment in vitro. LY294002 caused a decrease of phosphorylated-Akt and an inhibition of cell proliferation via cell cycle arrest in the G0/G1 phase by P27/Kip1 accumulation, but there was no obvious induction of apoptosis. The simultaneous treatment of LY294002 and CH-11 significantly induced apoptosis confirmed by morphology and DNA ladder formation. Decreased phosphorylated-Akt by LY294002 treatment led to a down-regulation of Mcl-2 and phosphorylated Bad proteins, which are anti-apoptotic factors and belong to the Bcl-2 family. On the other hand, expression levels of the other anti-apoptotic factors, such as FLICE-inhibitory protein (FLIP), Bcl-2 and Bcl-XL, which are associated with the Fas-mediated apoptotic signal pathway, did not change after LY294002 treatment. We concluded that: 1) the PI3K-Akt pathway plays an important role in preventing Fas-mediated apoptosis; and 2) a PI3 K inhibitor, such as LY294002, might be a useful anti-tumoral agent for gastric carcinoma.     

2-(3羧基-1-丙酰氨基)-2-脱氧-D-葡萄糖对人胃癌细胞系(SGC-7901)的诱导凋亡作用

目的 观察2-(3-羧基-t-丙酰氨基)-2-脱氧-D-葡萄糖(COADG)体外诱导人胃癌细胞(SGC-7901)凋亡的作用，探讨其可能作用机理。方法 采用MTT法，筛选药物作用最佳浓度。用流式细胞仪、琼脂糖凝胶电泳分析诱导凋亡前后的细胞DNA含量分析诱导凋亡前后的细胞DNA含量，透射电镜观察凋亡细胞的超微结构。结果 2-(3-羧基-1-丙酰氨基)-2-脱氧-D-葡萄糖能明显抑制胃癌细胞的增长，MTT法显示抑制程度具有时间和剂量效应关系，统计组问比较差异有显著性；流式细胞仪分析可见亚二倍体(Sub-G1)凋亡峰；电镜观察到凋亡小体。结论 2-(3-羧基-1-丙酰氨基)-2-脱氧-D-葡萄糖有诱导人胃癌细胞(SGC-7901)凋亡的作用。     

QHF复方联合小剂量顺铂对小鼠H_(22)肝癌血管生成的抑制作用

目的:探讨QHF复方联合小剂量化疗药物顺铂(DDP)对小鼠H22肝癌血管生成的影响,观察其抑瘤效果和不良反应.方法:48只BALB/c小鼠右腋皮下注射小鼠H22肝癌细胞建立荷瘤模型,随机分设为QHF复方组、小剂量DDP、联合用药组(QHF+DDP)及生理盐水组(NS).以抑瘤率为指标,观察各药物对荷瘤小鼠肿瘤生长的抑制作用;以小鼠的一般状况及脾指数为指标,观察各药物对荷瘤小鼠的不良反应;光镜观察肿瘤组织形态;免疫组织化学方法检测各药物对小鼠肝癌组织中的微血管密度(MVD).结果:QHF组、DDP组和联合用药组的瘤质量均较NS对照组明显降低(0.63 g±0.16 g,0.45 g±0.23 g,0.33 g±0.15 g vs 1.22 g±0.22 g,均P<0.01),联合用药组较QHF组显著降低(P<0.01).抑瘤率分别为47.45%、63.11%和72.95%.QHF组、DDP组和联合用药组小鼠移植瘤组织内的MVD数量较NS对照组明显降低(11.00±1.56,10.33±1.49,6.87±0.97 vs19.93±1.02,均P<0.01);联合用药组与各单药组相比明显降低(均P<0.01).QHF与DDP联合应用组的不良反应较单用DDP组轻,生存质量较好.结论:QHF复方与小剂量DDP均具有抗肝癌血管生成的作用;QHF复方与小剂量DDP联合应用具有协同抗肝癌血管生成的作用,同时QHF复方具有提高生存质量和降低化疗药物不良反应的作用.     

血小板增多、环氧化酶-2在老年胃癌中表达及预后

目的　研究血小板增多、环氧化酶 2 (COX 2 )表达与老年胃癌预后的关系。方法　回顾分析了 92例老年胃癌患者血小板增多、87例老年胃癌COX 2表达情况 ,并分析其与胃癌临床病理特征关系及预后影响。结果　胃癌患者血小板增多发生率为 2 8.2 6 % ,COX 2蛋白表达阳性率为 52 .5 % ,并且二者表达呈正相关 (P <0 .0 1 )。血小板增多、COX 2表达与肿瘤大小、浸润深度、淋巴结转移、TNM分期、血管癌栓密切相关 (P <0 .0 1 ) ,血小板增多、COX 2阳性表达与胃癌预后呈负相关。多因素分析表明 ,血小板增多是继TNM分期、淋巴结转移之后影响胃癌患者生存的独立预后因素。结论　血小板增多与COX 2表达密切相关 ,二者与胃癌生长、浸润关系密切 ,可作为估计老年胃癌预后的重要因素。