氯化锂抑制血管平滑肌细胞增殖和迁移以及抗神经细胞损伤的分子机制研究
[Abstract]:Lithium ion, one of the lightest elements of the chemical periodic table, has been used to treat mental disorders for more than a century. Lithium ion not only can effectively control acute mania and acute depression, but also can prevent mania and depression recurrence, so lithium ion is one of the first choice for the treatment of bipolar and monophasic depressive disorder. Pathological proliferation and migration of vascular smooth muscle cells (vascular smooth muscle cells,VSMCs) is an important inducement of cardiovascular diseases and an independent risk factor for in-stent restenosis. Recent studies have shown that lithium ions also have protective effects on cardiovascular systems. However, at present, the reports mainly focus on the description of the phenomenon, and lack of in-depth and meticulous mechanism discussion. Transcription coactivator PGC-1 伪 (peroxisome proliferator activated receptor y coactivator1 伪 is the most important energy metabolism regulator found in recent years. Recently, we have noticed that PGC-1 伪 is also active in regulating the function of VSMCs, and increasing the expression of PGC-1 伪 has important application value in the treatment of endometrial hyperplasia. We found that pre-incubated lithium chloride (lithium chloride, LiCl) could increase the protein expression and nuclear localization of PGC1 伪 in a dose-dependent manner. Tetramethylazo salt (MTT) and acetylene deoxyuridine (EdU) assay showed that LiCl could inhibit the proliferation of VSMCs induced by serum. Similarly, scratch vR-(wound healing) assay and migration chamber (Transwell) assay demonstrated that LiCl could inhibit serum-induced VSMCs migration, and LiC1 could also block serum-induced (reactive oxygen species, ROS) production and cell cycle pathological process. At the molecular level, LiC reduces the amount of protein needed to re-enter the cell cycle, adhesion, inflammation, and migration. In addition, in vivo, rats were given LiCl for 14 days, which slowed down the pathological changes of intimal hyperplasia after balloon injury. More importantly, interference with the expression of PGC-1 伪 by PGC-1 伪 siRNA can significantly weaken the protective effect of LiCl on VSMCs in vivo and in vitro. Local anesthesia plays an important role in spinal anesthesia and pain relief. However, local anesthesia may cause neurotoxicity and neurologic complications after surgery. We explored the protective effect of LiCl on neurotoxicity. In our study, we used mouse neuroblastoma cell line (mouse neuroblastoma neuro2a, N2a cultured in vitro to investigate the effect of LiCl on synaptic growth and its mechanism. The results showed that preincubation with LiCl could reduce the damage of N2a cells induced by bupivacaine. It reversed the decrease of Akt (threonine-serine protein kinase B) and ERKs) induced by bupivacaine and blocked the decrease of mitochondrial membrane potential. We also observed that inhibitors of Akt and ERKs signaling pathways weaken the protective effect of LiCl on nerve injury induced by bupivacaine. In conclusion, our study shows that LiCl has important protective effects on proliferation and migration of VSMCs in vitro and on the pathological model of intimal hyperplasia in vivo. In addition, LiCL can activate both intracellular Akt and ERKs signaling pathways in N2a cells. LiCl protects the synapses of N2a cells from the cytotoxicity of bupivacaine mainly through Akt and ERKs signaling pathways.
【学位授予单位】:南京师范大学
【学位级别】:博士
【学位授予年份】:2014
【分类号】:R329.2
【共引文献】
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