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Methionine and methionine sulfoxide induces neurochemical and morphological changes in cultured astrocytes: Involvement of Na+, K+-ATPase activity, oxidative status, and cholinergic and purinergic signaling.
NeuroToxicology ( IF 3.4 ) Pub Date : 2019-12-25 , DOI: 10.1016/j.neuro.2019.12.013
Mayara Sandrielly Pereira Soares 1 , Nathalia Stark Pedra 1 , Natália Pontes Bona 2 , Anita Ávila de Souza 1 , Fernanda Cardoso Teixeira 1 , Juliana Hofstatter Azambuja 3 , Angela Ts Wyse 4 , Elizandra Braganhol 3 , Francieli Moro Stefanello 2 , Roselia Maria Spanevello 1
Affiliation  

Hypermethioninemia is an inherited metabolic disorder characterized by high concentration of methionine (Met) and its metabolites such as methionine sulfoxide (Met-SO), which may lead to development of neurological alterations. The aim of this study was to investigate the in vitro effects of Met or Met-SO on viability, proliferation, morphology, and neurochemical parameters in primary culture of cortical astrocytes, after treatment with 1 or 2 mM Met or 0.5 mM Met-SO, for 24, 48, and 72 h. Met or Met-SO did not affect cell viability and proliferation but induced astrocyte hypertrophy. Acetylcholinesterase activity was increased, while Na+, K+-ATPase activity was decreased by 2 mM Met, Met-SO, or Met (1 and 2 mM) + Met-SO (P < 0.05). ATP and AMP hydrolysis was decreased by Met (1 and 2 mM), Met-SO and Met (1 and 2 mM) + Met-SO treatment, while ADP hydrolysis was enhanced by Met-SO and Met (1 and 2 mM) + Met-SO (P < 0.05). Superoxide dismutase activity was increased by Met-SO and Met (1 and 2 mM) + Met-SO (P < 0.05). Catalase and glutathione S-transferase activities were reduced by Met or Met-SO treatment for 48 and 72 h (P < 0.05). Reactive oxygen species and total thiol content was reduced by Met or Met-SO treatment for 24, 48, and 72 h while nitrite and thiobarbituric acid reactive substance levels were increased under the same experimental conditions (P < 0.05). High concentrations of Met and Met-SO do not cause cell death but induced changes in astrocyte function. These alterations in astrocytic homeostasis may be associated with neurological symptoms found in hypermethioninemia.

中文翻译:

蛋氨酸和蛋氨酸亚砜诱导培养的星形胶质细胞发生神经化学和形态学变化:涉及Na +,K + -ATPase活性,氧化状态以及胆碱能和嘌呤能信号传导。

高蛋氨酸血症是一种遗传性代谢疾病,其特征是蛋氨酸(Met)及其代谢产物(如蛋氨酸亚砜(Met-SO))浓度高,可能导致神经系统疾病的发展。这项研究的目的是研究用1或2 mM Met或0.5 mM Met-SO处理后,Met或Met-SO对皮层星形胶质细胞原代培养物的活力,增殖,形态和神经化学参数的体外影响,持续24、48和72小时。Met或Met-SO不会影响细胞活力和增殖,但会诱导星形胶质细胞肥大。乙酰胆碱酯酶活性增加,而Na +,K + -ATPase活性降低2 mM Met,Met-SO或Met(1和2 mM)+ Met-SO(P <0.05)。Met(1和2 mM),Met-SO和Met(1和2 mM)+ Met-SO处理可降低ATP和AMP的水解,Met-SO和Met(1和2 mM)+ Met-SO增强ADP水解(P <0.05)。Met-SO和Met(1和2 mM)+ Met-SO增加了超氧化物歧化酶的活性(P <0.05)。Met或Met-SO处理48和72 h,过氧化氢酶和谷胱甘肽S-转移酶活性降低(P <0.05)。在相同的实验条件下,通过Met或Met-SO处理24、48和72 h,活性氧种类和总硫醇含量降低,而亚硝酸盐和硫代巴比妥酸活性物质含量增加(P <0.05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。Met-SO和Met(1和2 mM)+ Met-SO增加了超氧化物歧化酶的活性(P <0.05)。Met或Met-SO处理48和72 h,过氧化氢酶和谷胱甘肽S-转移酶活性降低(P <0.05)。在相同的实验条件下,通过Met或Met-SO处理24、48和72 h,活性氧种类和总硫醇含量降低,而亚硝酸盐和硫代巴比妥酸活性物质含量增加(P <0.05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。Met-SO和Met(1和2 mM)+ Met-SO增加了超氧化物歧化酶的活性(P <0.05)。Met或Met-SO处理48和72 h,过氧化氢酶和谷胱甘肽S-转移酶活性降低(P <0.05)。在相同的实验条件下,通过Met或Met-SO处理24、48和72 h,活性氧种类和总硫醇含量降低,而亚硝酸盐和硫代巴比妥酸活性物质含量增加(P <0.05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。Met或Met-SO处理48和72 h,过氧化氢酶和谷胱甘肽S-转移酶活性降低(P <0.05)。在相同的实验条件下,通过Met或Met-SO处理24、48和72 h,活性氧种类和总硫醇含量降低,而亚硝酸盐和硫代巴比妥酸活性物质含量增加(P <0.05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。Met或Met-SO处理48和72 h,过氧化氢酶和谷胱甘肽S-转移酶活性降低(P <0.05)。在相同的实验条件下,通过Met或Met-SO处理24、48和72 h,活性氧种类和总硫醇含量降低,而亚硝酸盐和硫代巴比妥酸活性物质含量增加(P <0.05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。05)。高浓度的Met和Met-SO不会导致细胞死亡,但会引起星形胶质细胞功能的改变。星形细胞稳态的这些改变可能与高蛋氨酸血症中发现的神经系统症状有关。
更新日期:2019-12-26
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