目的:探讨肿瘤微环境中神经元对胶质瘤细胞迁移能力的影响。方法:分离培养胚胎18 d(E18)大鼠神经元,利用表达靶向神经连接蛋白3(NLGN3)分子shRNA的重组慢病毒(Lv-NLGN3-shRNA)感染神经元,real time RT-PCR和酶联免疫吸附试验(ELISA)检测...目的:探讨肿瘤微环境中神经元对胶质瘤细胞迁移能力的影响。方法:分离培养胚胎18 d(E18)大鼠神经元,利用表达靶向神经连接蛋白3(NLGN3)分子shRNA的重组慢病毒(Lv-NLGN3-shRNA)感染神经元,real time RT-PCR和酶联免疫吸附试验(ELISA)检测NLGN3的表达,收集神经元培养上清与胶质瘤细胞系U251细胞共培养,Transwell实验检测U251细胞迁移能力,Western Blot方法检测U251细胞中哺乳动物雷帕霉素靶蛋白(mTOR)和基质金属蛋白酶-9(MMP-9)的表达。结果:Lv-NLGN3-shRNA重组慢病毒感染能够降低大鼠原代神经元中NLGN3 mRNA和蛋白的的表达,神经元培养上清与U251细胞共培养可以增加后者的迁移能力并上调mTOR和MMP-9的表达。然而,NLGN3表达被Lv-NLGN3-shRNA抑制后,培养上清对U251细胞促迁移能力下降,同时mTOR和MMP-9表达降低。结论:大鼠原代神经元可以通过NLGN3/mTOR/MMP-9信号通路增强U251细胞的迁移能力,这一途径可能是胶质瘤细胞转移的机制之一。展开更多
Matrix metalloproteinase-9 (MMP-9) is a highly glycosylated endopeptidase implicated in a wide rage of oral mucosal inflammatory and neoplastic diseases, including chronic periodontitis, a persistent mucosal inflammat...Matrix metalloproteinase-9 (MMP-9) is a highly glycosylated endopeptidase implicated in a wide rage of oral mucosal inflammatory and neoplastic diseases, including chronic periodontitis, a persistent mucosal inflammation attributed primarily to infection by oral anaerobe, P. gingivalis. In this study, we explored the role of Rac1 and mitogen-activated protein kinases (MAPKs) in the processes of MMP-9 release in sublingual salivary gland cells exposed to P. gingivalis key endotoxin, cell wall lipopolysaccharide (LPS). We demonstrate that the LPS-elicited induction in the acinar cell MMP-9 release is associated with MAPK, ERK and p38 activation, and occurs with the involvement of Rac1 and cytosolic phospholipase A<sub>2</sub> (cPLA<sub>2</sub>). Further, we reveal that the LPS-induced MMP-9 release involves ERK-mediated phosphorylation of cPLA<sub>2</sub> on Ser<sup>505</sup> that is essential for its membrane translocation with Rac1, and that this process requires p38 activation. Moreover, we show that phosphorylation and membrane localization of p38 with Rac1-GTP play a pivotal role in cPLA<sub>2</sub>-dependent induction in MMP-9 release. Thus collectively, our findings infer that P. gingivalis LPS-induced up-regulation in the acinar cell MMP-9 release requires ERK-dependent recruitment of cPLA<sub>2</sub> to the membrane localized Rac1/p38 complex.展开更多
【目的】观察扶正化瘀通络方治疗高血压脑出血恢复期气虚血瘀证患者的临床疗效及对血清基质金属蛋白酶9(matrix metalloproteinase-9,MMP-9)、S100-β蛋白(S100-βprotein,S100-β)、苏氨酸蛋白激酶(threonine protein kinase,AKT)和Th1...【目的】观察扶正化瘀通络方治疗高血压脑出血恢复期气虚血瘀证患者的临床疗效及对血清基质金属蛋白酶9(matrix metalloproteinase-9,MMP-9)、S100-β蛋白(S100-βprotein,S100-β)、苏氨酸蛋白激酶(threonine protein kinase,AKT)和Th1/Th2平衡的影响。【方法】将130例高血压脑出血恢复期气虚血瘀证患者随机分为对照组和观察组,每组各65例。对照组给予西医常规治疗,观察组在对照组的基础上联合扶正化瘀通络方治疗,疗程为4周。观察2组患者治疗前后美国国立卫生研究院卒中量表(NIHSS)评分、健康状况调查简表(SF-36)评分、中医证候积分(主要症状包括乏力、偏瘫、口眼歪斜,次要症状包括头部刺痛、气短)及血清MMP-9、S100-β、AKT和白细胞介素10(IL-10)、超敏C反应蛋白(Hs-CRP)、同型半胱氨酸(Hcy)、白细胞介素6(IL-6)水平的变化情况,并评价2组患者的临床疗效。【结果】(1)治疗4周后,观察组的总有效率为95.38%(62/65),对照组为78.46%(51/65),组间比较,观察组的疗效明显优于对照组(P<0.05)。(2)治疗后,2组患者的NIHSS评分和中医证候积分均较治疗前明显降低(P<0.05),SF-36评分均较治疗前明显升高(P<0.05),且观察组对NIHSS评分和中医证候积分的降低幅度及对SF-36评分的升高幅度均明显优于对照组(P<0.05)。(3)治疗后,2组患者的血清MMP-9、S100-β、AKT水平均较治疗前明显降低(P<0.05),且观察组对血清MMP-9、S100-β、AKT水平的降低幅度均明显优于对照组(P<0.05)。(4)治疗后,2组患者血清Hs-CRP、Hcy、IL-6水平均较治疗前明显降低(P<0.05),血清IL-10水平均较治疗前明显升高(P<0.05),且观察组对血清Hs-CRP、Hcy、IL-6水平的降低幅度及对血清IL-10水平的升高幅度均明显优于对照组,差异均有统计学意义(P<0.05)。【结论】对于高血压脑出血恢复期气虚血瘀证患者而言,在西医常规治疗基础上联合扶正化瘀通络方治疗,可有效促进Th1/Th2平衡恢复,减轻氧化应激失衡,提高临床疗效。展开更多
文摘Matrix metalloproteinase-9 (MMP-9) is a highly glycosylated endopeptidase implicated in a wide rage of oral mucosal inflammatory and neoplastic diseases, including chronic periodontitis, a persistent mucosal inflammation attributed primarily to infection by oral anaerobe, P. gingivalis. In this study, we explored the role of Rac1 and mitogen-activated protein kinases (MAPKs) in the processes of MMP-9 release in sublingual salivary gland cells exposed to P. gingivalis key endotoxin, cell wall lipopolysaccharide (LPS). We demonstrate that the LPS-elicited induction in the acinar cell MMP-9 release is associated with MAPK, ERK and p38 activation, and occurs with the involvement of Rac1 and cytosolic phospholipase A<sub>2</sub> (cPLA<sub>2</sub>). Further, we reveal that the LPS-induced MMP-9 release involves ERK-mediated phosphorylation of cPLA<sub>2</sub> on Ser<sup>505</sup> that is essential for its membrane translocation with Rac1, and that this process requires p38 activation. Moreover, we show that phosphorylation and membrane localization of p38 with Rac1-GTP play a pivotal role in cPLA<sub>2</sub>-dependent induction in MMP-9 release. Thus collectively, our findings infer that P. gingivalis LPS-induced up-regulation in the acinar cell MMP-9 release requires ERK-dependent recruitment of cPLA<sub>2</sub> to the membrane localized Rac1/p38 complex.
文摘【目的】观察扶正化瘀通络方治疗高血压脑出血恢复期气虚血瘀证患者的临床疗效及对血清基质金属蛋白酶9(matrix metalloproteinase-9,MMP-9)、S100-β蛋白(S100-βprotein,S100-β)、苏氨酸蛋白激酶(threonine protein kinase,AKT)和Th1/Th2平衡的影响。【方法】将130例高血压脑出血恢复期气虚血瘀证患者随机分为对照组和观察组,每组各65例。对照组给予西医常规治疗,观察组在对照组的基础上联合扶正化瘀通络方治疗,疗程为4周。观察2组患者治疗前后美国国立卫生研究院卒中量表(NIHSS)评分、健康状况调查简表(SF-36)评分、中医证候积分(主要症状包括乏力、偏瘫、口眼歪斜,次要症状包括头部刺痛、气短)及血清MMP-9、S100-β、AKT和白细胞介素10(IL-10)、超敏C反应蛋白(Hs-CRP)、同型半胱氨酸(Hcy)、白细胞介素6(IL-6)水平的变化情况,并评价2组患者的临床疗效。【结果】(1)治疗4周后,观察组的总有效率为95.38%(62/65),对照组为78.46%(51/65),组间比较,观察组的疗效明显优于对照组(P<0.05)。(2)治疗后,2组患者的NIHSS评分和中医证候积分均较治疗前明显降低(P<0.05),SF-36评分均较治疗前明显升高(P<0.05),且观察组对NIHSS评分和中医证候积分的降低幅度及对SF-36评分的升高幅度均明显优于对照组(P<0.05)。(3)治疗后,2组患者的血清MMP-9、S100-β、AKT水平均较治疗前明显降低(P<0.05),且观察组对血清MMP-9、S100-β、AKT水平的降低幅度均明显优于对照组(P<0.05)。(4)治疗后,2组患者血清Hs-CRP、Hcy、IL-6水平均较治疗前明显降低(P<0.05),血清IL-10水平均较治疗前明显升高(P<0.05),且观察组对血清Hs-CRP、Hcy、IL-6水平的降低幅度及对血清IL-10水平的升高幅度均明显优于对照组,差异均有统计学意义(P<0.05)。【结论】对于高血压脑出血恢复期气虚血瘀证患者而言,在西医常规治疗基础上联合扶正化瘀通络方治疗,可有效促进Th1/Th2平衡恢复,减轻氧化应激失衡,提高临床疗效。
