活性氧
氧化应激
抗氧化剂
化学
下调和上调
石墨烯
量子点
细胞生物学
细胞凋亡
纳米技术
生物物理学
生物化学
生物
材料科学
基因
作者
Preety Choudhary,Sushama Biswas,Noufal Kandoth,Deepak Tayde,Abhishek Chatterjee,Samit Chattopadhyay,Amitava Das,Snehasikta Swarnakar,Sumit Kumar Pramanik
出处
期刊:iScience
[Cell Press]
日期:2022-03-12
卷期号:25 (4): 104062-104062
被引量:17
标识
DOI:10.1016/j.isci.2022.104062
摘要
The gastrointestinal (GI) tract is one of the major sites for reactive oxygen species generation (ROS). Physiological ROS, lower than the threshold concentration, is beneficial for human physiology to preserve gut functional integrity. However, ROS generated in large quantities in presence of external stimuli overwhelms the cellular antioxidant defense mechanism and results in oxidative damage and associated physiological disorder. Graphene quantum dots (GQDs) are a class of carbon-based nanomaterials that have attracted tremendous attention not only for their tunable optical properties but also for their broad-spectrum antioxidant properties. In this report we have shown that GQDs are highly efficient in scavenging ROS and suppressing stress-induced gastric ulcers by targeting the MMP-9 pathway and reducing the inflammatory burden by suppressing excessive oxidative stress by inducing high caspase activity, overproduction of Bax, and downregulation of BCL2.
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