目的:检测大肠癌原发灶与淋巴结(lymph node,LN)转移灶中磷脂酰肌醇3-激酶(phosphatidylinositol 3-kinase,PI3K)p110α、PI3Kp110β与B细胞淋巴瘤基因-2(B c e l l lymphoma 2,Bcl-2)、CyclinD1的表达情况,探讨在大肠癌发生及转移中的...目的:检测大肠癌原发灶与淋巴结(lymph node,LN)转移灶中磷脂酰肌醇3-激酶(phosphatidylinositol 3-kinase,PI3K)p110α、PI3Kp110β与B细胞淋巴瘤基因-2(B c e l l lymphoma 2,Bcl-2)、CyclinD1的表达情况,探讨在大肠癌发生及转移中的相关性及其与临床病理因素及预后的关系.方法:采用免疫组织化学方法在30例正常大肠黏膜组织,52例未发生LN转移的大肠癌组织,50例发生LN转移的大肠癌原发灶及其转移灶中检测PI3Kp110α、PI3Kp110β、Bcl-2和CyclinD1的表达情况及其差异,分析PI3Kp110α、PI3Kp110β与Bcl-2和CyclinD1之间的相关性以及与临床病理因素及其预后的关系.结果:(1)PI3Kp110α与Bcl-2在无LN转移组、有LN转移组的原发灶和其相应LN转移灶中的表达均高于正常肠黏膜组(P<0.05);PI3Kp110β与CyclinD1在无LN转移组、有LN转移组的原发灶和其相应LN转移灶中的表达均高于正常肠黏膜组,且在有LN转移的原发灶中的表达均高于其相应LN转移灶和无LN转移组肠癌中的表达(P<0.05);(2)PI3Kp110α与Bcl-2在4组中均呈正相关(P<0.05);PI3Kp110α与CyclinD1在正常肠黏膜组,无LN转移组和有LN转移组中均呈正相关(P<0.05);P I3Kp110β与Bcl-2和CyclinD1在4组中均呈正相关(P<0.05);(3)PI3Kp110α、PI3Kp110β和CyclinD1蛋白的表达与肿瘤分化程度及LN转移相关,Bcl-2的表达与肿瘤分化程度相关;(4)Kaplan-Meier分析显示:PI3Kp110α、PI3Kp110β、Bcl-2和CyclinD1为影响大肠癌预后的因素之一;Cox比例风险模型分析显示:PI3Kp110α、PI3Kp110β是影响大肠癌患者预后的独立因素.结论:(1)PI3Kp110α、PI3Kp110β与Bcl-2、CyclinD1在大肠癌原发灶及转移灶中的表达均高于正常黏膜,在肿瘤的发生发展中发挥重要作用;(2)大肠癌LN转移灶中,PI3Kp110α与PI3Kp110β分别通过影响Bcl-2及CyclinD1对转移灶中的肿瘤生长起促进作用;(3)PI3Kp110α、PI3Kp110β、Bcl-2和CyclinD1与大肠癌的分化程度有关,且PI3Kp110α、PI3Kp110β和CyclinD1与大肠癌的转移密切相关;(4)PI3Kp110α和PI3Kp110β是影响大肠癌预后的独立危险因素.展开更多
The role of B7-1 in podocyte injury has received increasing attention.The aim of this study was to investigate whether losartan protects podocytes of patients with diabetic kidney disease(DKD)by regulating B7-1 and th...The role of B7-1 in podocyte injury has received increasing attention.The aim of this study was to investigate whether losartan protects podocytes of patients with diabetic kidney disease(DKD)by regulating B7-1 and the underlying mechanisms.Rats with streptozotocin-induced DKD were treated with losartan for 8 weeks.Biochemical changes in blood and urine were analyzed.Kidneys were isolated for electron microscopy,immunofluorescence,real-time quantitative PCR(RT-PCR),and Western blot analysis.Immortalized mouse podocyte cells were cultured in normal or high glucose medium in the presence or absence of losartan for 48 h,and then the cells were collected for immunofluorescence,PCR,Western blotting and monolayer permeability detection.The phosphatidylinositol 3-kinase(PI3K)110a subunit and angiotensin II type 1 receptor(AT1R)plasmids were transfected into podocytes,respectively,and then Western blotting was performed to assess the expression of B7-1 protein.The results showed that losartan ameliorated podocyte structure and function in the rat model of DKD,and reduced the expression of B7-1 protein.Overexpression of PI3K 110a subunit in podocytes attenuated the inhibitory effect of losartan on B7-1 expression in high glucose-stimulated podocytes.The expression of B7-1 was significantly increased by overexpression of ATI R and significantly reduced by blocking PI3K 110a subunit.We conclude that losartan protects podocytes against high glucose-induced injury by inhibiting AT1R-mediated B7-1 expression.This effect is dependent on the AT1R-PI3K 110a subunit pathway.展开更多
文摘目的:检测大肠癌原发灶与淋巴结(lymph node,LN)转移灶中磷脂酰肌醇3-激酶(phosphatidylinositol 3-kinase,PI3K)p110α、PI3Kp110β与B细胞淋巴瘤基因-2(B c e l l lymphoma 2,Bcl-2)、CyclinD1的表达情况,探讨在大肠癌发生及转移中的相关性及其与临床病理因素及预后的关系.方法:采用免疫组织化学方法在30例正常大肠黏膜组织,52例未发生LN转移的大肠癌组织,50例发生LN转移的大肠癌原发灶及其转移灶中检测PI3Kp110α、PI3Kp110β、Bcl-2和CyclinD1的表达情况及其差异,分析PI3Kp110α、PI3Kp110β与Bcl-2和CyclinD1之间的相关性以及与临床病理因素及其预后的关系.结果:(1)PI3Kp110α与Bcl-2在无LN转移组、有LN转移组的原发灶和其相应LN转移灶中的表达均高于正常肠黏膜组(P<0.05);PI3Kp110β与CyclinD1在无LN转移组、有LN转移组的原发灶和其相应LN转移灶中的表达均高于正常肠黏膜组,且在有LN转移的原发灶中的表达均高于其相应LN转移灶和无LN转移组肠癌中的表达(P<0.05);(2)PI3Kp110α与Bcl-2在4组中均呈正相关(P<0.05);PI3Kp110α与CyclinD1在正常肠黏膜组,无LN转移组和有LN转移组中均呈正相关(P<0.05);P I3Kp110β与Bcl-2和CyclinD1在4组中均呈正相关(P<0.05);(3)PI3Kp110α、PI3Kp110β和CyclinD1蛋白的表达与肿瘤分化程度及LN转移相关,Bcl-2的表达与肿瘤分化程度相关;(4)Kaplan-Meier分析显示:PI3Kp110α、PI3Kp110β、Bcl-2和CyclinD1为影响大肠癌预后的因素之一;Cox比例风险模型分析显示:PI3Kp110α、PI3Kp110β是影响大肠癌患者预后的独立因素.结论:(1)PI3Kp110α、PI3Kp110β与Bcl-2、CyclinD1在大肠癌原发灶及转移灶中的表达均高于正常黏膜,在肿瘤的发生发展中发挥重要作用;(2)大肠癌LN转移灶中,PI3Kp110α与PI3Kp110β分别通过影响Bcl-2及CyclinD1对转移灶中的肿瘤生长起促进作用;(3)PI3Kp110α、PI3Kp110β、Bcl-2和CyclinD1与大肠癌的分化程度有关,且PI3Kp110α、PI3Kp110β和CyclinD1与大肠癌的转移密切相关;(4)PI3Kp110α和PI3Kp110β是影响大肠癌预后的独立危险因素.
基金financial support from the National Natural Science Foundation of China(No.21973013 and No.21673040)the National Natural Science Foundation of Fujian Province,China(No.2020J02025)+3 种基金the“Chuying Program”for the Top Young Talents of Fujian Provincesupported financially through a NWO/CW TOP grant(No.715.017.001)by a grant of supercomputer time from NWO Exacte en Natuurwetenschappen(NWO-ENW,No.2019.015)the National Science Foundation(No.CHE1951328)。
基金the National Natural Science Foundation of China(No.81400333).
文摘The role of B7-1 in podocyte injury has received increasing attention.The aim of this study was to investigate whether losartan protects podocytes of patients with diabetic kidney disease(DKD)by regulating B7-1 and the underlying mechanisms.Rats with streptozotocin-induced DKD were treated with losartan for 8 weeks.Biochemical changes in blood and urine were analyzed.Kidneys were isolated for electron microscopy,immunofluorescence,real-time quantitative PCR(RT-PCR),and Western blot analysis.Immortalized mouse podocyte cells were cultured in normal or high glucose medium in the presence or absence of losartan for 48 h,and then the cells were collected for immunofluorescence,PCR,Western blotting and monolayer permeability detection.The phosphatidylinositol 3-kinase(PI3K)110a subunit and angiotensin II type 1 receptor(AT1R)plasmids were transfected into podocytes,respectively,and then Western blotting was performed to assess the expression of B7-1 protein.The results showed that losartan ameliorated podocyte structure and function in the rat model of DKD,and reduced the expression of B7-1 protein.Overexpression of PI3K 110a subunit in podocytes attenuated the inhibitory effect of losartan on B7-1 expression in high glucose-stimulated podocytes.The expression of B7-1 was significantly increased by overexpression of ATI R and significantly reduced by blocking PI3K 110a subunit.We conclude that losartan protects podocytes against high glucose-induced injury by inhibiting AT1R-mediated B7-1 expression.This effect is dependent on the AT1R-PI3K 110a subunit pathway.
文摘目的:探讨RNA干扰靶向抑制PIK3CB基因(编码PI3Kp110β蛋白)的表达对结肠癌HCT116细胞增殖和凋亡的影响。方法:设计3条针对PIK3CB基因的小干扰RNA(small interfering RNA,siRNA)片段及1条阴性对照siRNA,分别瞬时转染结肠癌HCT116细胞。用Real time PCR及Western印迹法筛选出1条抑制效率最高的PIK3CB-siRNA序列,然后进行CCK-8细胞增殖实验,并采用JC-1染色法检测线粒体膜电位(Δψm)的变化。结果:经转染PIK3CB-siRNA-179序列的HCT116细胞中PI3Kp110βmRNA及蛋白表达降低最为明显,抑制率达80%,选择该条siRNA作为有效干扰组进行后续实验。CCK-8细胞增殖实验显示,瞬时转染24、48及72h后,PIK3CB-siRNA-179组细胞的相对存活率较阴性对照组细胞明显降低,其中以24h及48h降低最为明显(P<0.05)。JC-1染色结果显示,瞬时转染48h后PIK3CB-siRNA-179组细胞的线粒体膜电位较阴性对照组细胞明显降低。结论:抑制PI3Kp110β蛋白表达可降低结肠癌HCT116细胞的增殖速度,诱导细胞的凋亡,推测PIK3CB基因可能成为结肠癌基因治疗的一个新靶点。
