丹参多酚酸与三七总皂苷合用保护OGD/R损伤胶质细胞线粒体、促进神经因子表达作用研究*
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(天津中医药大学组分中药国家重点实验室,天津 301600)

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R285.5

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收稿日期: 2021 - 07- 22
* 基金项目: 国家自然科学基金(81573644)
第一作者简介: 曹玉爽(1997-),女,在读硕士研究生,研究方向:脑血管药物药理。
△通信作者: 胡利民,E-mail:huliminth@126.com


Study on the Effects of SAL and PNS on Protecting Glial Mitochondria and Promoting the Expression of Neural Factors
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(State Key Laboratory of Component Chinese Medicine, Tianjin University ofTraditional Chinese Medicine, Tianjin 301600, China)

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    摘要:

    目的 探讨丹参多酚酸(Salvianolate Acid,SAL)和三七总皂苷(Panax Notoginseng Saponins,PNS)合用保护氧糖剥夺/复氧复糖(Oxygen-Glucose Deprivation/Reoxygenation,OGD/R)损伤后星形胶质细胞线粒体、促进神经营养因子表达的作用及机制。方法 大鼠星形胶质细胞原代培养,建立OGD/R损伤模型。Cell counting kit-8(CCK-8)法检测星形胶质细胞活力,流式细胞仪检测活性氧(reactive oxygen species,ROS)释放量、胞内Ca2+ 浓度、线粒体膜电位(mitochondrial membrane potential,MMP)变化,实时定量PCR(real time polymerase chain reaction,RT-PCR)和蛋白质免疫印迹(western blot,WB)法检测HIF-1α、PI3K/Akt/mTOR信号通路蛋白及脑源性神经营养因子(brain-derived neurotrophic factor,BDNF)、神经生长因子(nerve growth factor,NGF)、胰岛素样生长因子(insulin-like growth factors,IGF-1α)的表达情况。结果 胶质细胞OGD/R条件确定为OGD4h/R24h,给药浓度确定为SAL 25 μg·mL-1、PNS 6.25 μg·mL-1。与OGD/R组相比,SAL 25 μg·mL-1、PNS 6.25 μg·mL-1、SAL 25 μg·mL-1与PNS 6.25 μg·mL-1合用均能增强损伤后星形胶质细胞活力(P<0.05),升高MMP,降低ROS释放量(P<0.05),降低损伤后星形胶质细胞HIF-1α蛋白和mRNA的表达,升高磷脂酰肌醇激酶(PI3K)磷酸化水平(P<0.05);SAL还可升高mTOR蛋白磷酸化水平(P<0.05),PNS可提高Akt磷酸化水平(P<0.05),增加损伤星形胶质细胞BDNF mRNA 表达(P<0.05);SAL、SAL与PNS合用能增加损伤后星形胶质细胞 BDNF、NGF、IGF-1α mRNA 表达(P<0.05)。结论 丹参多酚酸和三七总皂苷组分合用可保护OGD/R损伤后星形胶质细胞线粒体、促进胶质细胞表达神经营养因子BDNF、NGF、IGF-1α。

    Abstract:

    Objective To investigate the effect and mechanism of the combination of Salvianolic Acid(SAL) and Panax Notoginseng Saponins(PNS) on the protection on astrocytes mitochondria and promotion of the expression of neurotrophic factor after Oxygen Glucose Deprivation/Reoxygenation(OGD/R) injury. Methods The activity of primary cultured rat astrocytes were detected by Cell counting Kit-8(CCK-8) method. The release of reactive oxygen species(ROS), intracellular Ca2+ concentration and mitochondrial membrane potential(MMP) were detected by flow cytometry. And real-time quantitative polymerase chain reaction(RT-PCR) and western blot(WB) methods were used to detect HIF-1α, PI3K/Akt/mTOR signaling pathway proteins, brain-derived neurotrophic factor (BDNF), nerve growth factor(NGF), insulin-like growth factors (IGF-1α). Results The OGD/R condition of glial cells was determined as OGD 4h/R24h and the concentration of SAL25 μg·mL-1 and PNS6.25 μg·mL-1 were determined. Compared with OGD/R group, the combined use of SAL25 μg·mL-1, PNS 6.25 μg·mL-1, SAL25 μg·mL-1 and PNS 6.25 μg·mL-1 could enhance the activity of astrocytes after injury, increase the MMP of astrocytes after injury.Decreased ROS release, decrease HIF-1α mRNA and protein expression in astrocytes after injury, increase Phosphatidylinositide 3-kinases(PI3K) phosphorylation level(P<0.05). In addition, SAL also can increase the phosphorylation level of mTOR protein, and PNS increase the phosphorylation level of Akt, and significantly increased the expression of BDNF mRNA in injured astrocytes(P<0.05).Combined use of SAL and PNS significantly increase the mRNA expression of BDNF, NGF and IGF-1α in astrocytes after injury(P<0.05). Conclusion Combined salvianolic acid and pantoginseng saponins can protect the mitochondria of astrocytes after OGD/R injury, promote the expression of neurotrophic factors BDNF, NGF and IGF-1α.

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