目的探讨环氧合酶-2(cycloxygenase-2,COX-2)对弥漫大B细胞淋巴瘤(diffuse large B-celllymphoma,DLBCL)患者预后的影响及其相关因素。方法根据2008年WHO淋巴造血组织肿瘤分类重新确认47例非特指型DLBCL患者的病理诊断,并区分生发中心...目的探讨环氧合酶-2(cycloxygenase-2,COX-2)对弥漫大B细胞淋巴瘤(diffuse large B-celllymphoma,DLBCL)患者预后的影响及其相关因素。方法根据2008年WHO淋巴造血组织肿瘤分类重新确认47例非特指型DLBCL患者的病理诊断,并区分生发中心型和非生发中心型。采用免疫组化EnVision二步法检测石蜡包埋肿瘤病理组织中COX-2的表达并分析其与患者预后的关系,同时检测标本BCL-2、Ki67以及P-糖蛋白(P-gp)的表达。结果 47例DLBCL患者中生发中心型仅占14.9%(7/47);11例表达COX-2,阳性率为23.4%,均来自于非生发中心型DLBCL(P=0.133)。COX-2阳性和阴性患者的中位生存时间分别为20个月和46个月;COX-2阳性患者的1年和5年生存率分别为54.55%和21.82%,而COX-2阴性患者则分别为91.43%和39.26%。两组的生存曲线差异具有统计学意义(P=0.028)。COX-2阳性标本中P-gp与BCL-2阳性表达率较COX-2阴性者高(P=0.020;P=0.004),但Ki67的表达在两组之间无明显差异(P=0.846)。结论本研究提示阳性表达COX-2的非特指型DLBCL患者多为非生发中心来源,预后较差,高表达P-gp与Bcl-2可能是其不良预后的重要影响因素。展开更多
Cytochrome P450 monoxygenase converts arachionic acid to four epoxyeicosatrienoic acid regiosomes: 5,6-EET(epoxyeicosatrienoic acid);8,9-EET; 11,12-EET and 14,15-EET.Recent studies show that EETs are involved in signa...Cytochrome P450 monoxygenase converts arachionic acid to four epoxyeicosatrienoic acid regiosomes: 5,6-EET(epoxyeicosatrienoic acid);8,9-EET; 11,12-EET and 14,15-EET.Recent studies show that EETs are involved in signal transduction. EETs open Ca 2+ -sensitive K + channel and inhibit Na + channel,Ca 2+ -sensitive Cl - channel and so on. What is more ,EETs have been demonstrated to activate PP60 c-src and initiate a tyrosine kinase cascade that mediates mitogenic effects.展开更多
Epoxyeicosatrienoic acids(EETs)are the metabolic products of arachidonic acid(AA). They have the function of stimulating cell division, inhibiting platelet aggregation and regulating the transfer of cell calcium. In r...Epoxyeicosatrienoic acids(EETs)are the metabolic products of arachidonic acid(AA). They have the function of stimulating cell division, inhibiting platelet aggregation and regulating the transfer of cell calcium. In recent years, more and more people paid their attention to the effects of EETs on heart. This article will give a review about EETs and the relationship between EETs and heart.展开更多
文摘目的探讨环氧合酶-2(cycloxygenase-2,COX-2)对弥漫大B细胞淋巴瘤(diffuse large B-celllymphoma,DLBCL)患者预后的影响及其相关因素。方法根据2008年WHO淋巴造血组织肿瘤分类重新确认47例非特指型DLBCL患者的病理诊断,并区分生发中心型和非生发中心型。采用免疫组化EnVision二步法检测石蜡包埋肿瘤病理组织中COX-2的表达并分析其与患者预后的关系,同时检测标本BCL-2、Ki67以及P-糖蛋白(P-gp)的表达。结果 47例DLBCL患者中生发中心型仅占14.9%(7/47);11例表达COX-2,阳性率为23.4%,均来自于非生发中心型DLBCL(P=0.133)。COX-2阳性和阴性患者的中位生存时间分别为20个月和46个月;COX-2阳性患者的1年和5年生存率分别为54.55%和21.82%,而COX-2阴性患者则分别为91.43%和39.26%。两组的生存曲线差异具有统计学意义(P=0.028)。COX-2阳性标本中P-gp与BCL-2阳性表达率较COX-2阴性者高(P=0.020;P=0.004),但Ki67的表达在两组之间无明显差异(P=0.846)。结论本研究提示阳性表达COX-2的非特指型DLBCL患者多为非生发中心来源,预后较差,高表达P-gp与Bcl-2可能是其不良预后的重要影响因素。
文摘Cytochrome P450 monoxygenase converts arachionic acid to four epoxyeicosatrienoic acid regiosomes: 5,6-EET(epoxyeicosatrienoic acid);8,9-EET; 11,12-EET and 14,15-EET.Recent studies show that EETs are involved in signal transduction. EETs open Ca 2+ -sensitive K + channel and inhibit Na + channel,Ca 2+ -sensitive Cl - channel and so on. What is more ,EETs have been demonstrated to activate PP60 c-src and initiate a tyrosine kinase cascade that mediates mitogenic effects.
文摘Epoxyeicosatrienoic acids(EETs)are the metabolic products of arachidonic acid(AA). They have the function of stimulating cell division, inhibiting platelet aggregation and regulating the transfer of cell calcium. In recent years, more and more people paid their attention to the effects of EETs on heart. This article will give a review about EETs and the relationship between EETs and heart.
