Objective: To investigate the changes in serum miR-124 levels in patients with acute cerebral infarction (ACI) and elucidate the underlying mechanism by a dynamic monitor.
Methods: Fifty-four patients with ACI and 51 healthy controls were included in our study. Baseline characteristics and blood samples were collected for further analysis. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to measure the serum miR-124 levels. The dual-luciferase reporter assay was used to evaluate the effect of miR-124 on iASPP, a protein that inhibits apoptosis stimulating proteins in the p53 family.
Results: Compared with normal controls, the miR-124 levels in the ACI group rapidly decreased at phase 1 (within 24?h after ischemia) (p?<?0.001) and then gradually increased at phase 2 (48?~?72?h after ischemia) (p?<?0.001) and phase 3 (the 7th day after ischemia) (p?<?0.001). The dual-luciferase reporter assay showed that miR-124 down-regulates iASPP expression in 293T cells.
Conclusion: The miR-124 levels are down-regulated in ACI patients. The dynamic changes of miR-124 might provide a possible method for the detection of ischemic stroke.
Highlights
The difference in miR-124 expression levels between ACI patients and normal controls.
Dynamic changes of miR-124 expression levels in ACI patients.
The down-regulation of miR-124 upon iASPP expression.
目的 观察p53凋亡刺激蛋白(apoptosis stimulating protein of p53,ASPP)家族的抑制因子(inhibitorymember of the ASPP family,iASPP)在大鼠脑缺血再灌注后的表达及其意义。方法 48只清洁级、成年健康雄性SD大鼠随机分为假手术组(8只)和脑缺血再灌注组(40只)。脑缺血再灌注组又分为缺血2h再灌注4h、12h、24h、48h和72h 5个时间点,其中每个时间点8只大鼠。苏木素-伊红染色测定脑梗死体积;原位末端转移酶标记技术检测半暗带细胞凋亡情况;免疫印迹法测定半暗带iASPP的表达变化。结果 脑缺血再灌注4h组和24h组的凋亡细胞阳性率与假手术组存在统计学差异(P <0.01)。脑缺血再灌注组的脑梗死体积百分比与假手术组相比具有统计学意义(P <0.05)。与假手术组相比,在脑缺血再灌注12h时iASPP表达开始下降(P <0.01),再灌注24h降至最低(P <0.01),再灌注48h开始回升(P <0.01)。结论 在脑缺血再灌注后,缺血半暗带凋亡细胞显著增多,iASPP表达下降,提示在脑缺血再灌注中iASPP的表达下降可能在细胞凋亡的发生中发挥重要作用,其表达上调可能具有神经保护作用。 相似文献
Background and Objective:iASPP, an inhibitory member of the apoptosis-stimulating proteins of p53 (ASPP) family, has been found to be up-regulated in various human tumor types.This study was to construct an efficient doxycycline-regulated, lentiviral vector-mediated knockdown system for iASPP that will allow for inducible down-regulation of iASPP gene expression and preliminary functional analysis.Methods:A pair of complementary oligos with hairpin structures targeting the iASPP gene and a negative control ... 相似文献