乙醇诱导的氧化应激,线粒体功能障碍,以及维克拉姆菌异常菌的自性
Xiaozhu Liu1, Yujie Wang2, Hongyue Xu1
1Guizhou Institute of Technology, Guiyang, 550000, China.
Microbial cell factories
|November 13, 2025
概括
乙醇压力通过增加反应性氧物种和破坏线粒体而损害酵母. 抗氧化剂通过减少氧化损伤和提高发酵期间细胞活力来保护酵母.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 发酵科学 发酵科学
背景情况:
- 维克拉摩菌异常对于葡萄酒的口味至关重要.
- 在发酵过程中,高度的乙醇会在酵母中引起压力.
- 乙醇压力对W. anomalus的生理影响尚未完全理解.
研究的目的:
- 研究乙醇压力对W. anomalus的生理和结构影响.
- 评估抗氧化剂对乙醇诱导的压力的保护作用.
- 阐明酵母中乙醇毒性和抗氧化作用的机制.
主要方法:
- 使用光染色评估反应性氧物种 (ROS).
- 测量了超氧化物脱酶 (SOD),酶 (CAT) 活动和谷氨 (GSH) 含量.
- 分析了线粒体膜潜力,电子运输链 (ETC) 活动和ATP水平.
- 通过传输电子显微镜检查细胞超结构并监测自.
主要成果:
- 乙醇诱导ROS生产和氧化应激,尽管增加了SOD,CAT和GSH水平.
- 乙醇损害了线粒体功能,减少了ATP合成,并触发了自.
- 抗氧化剂治疗 (N-乙半氨酸和谷氨) 缓解了氧化损伤,恢复了线粒体功能,抑制了自,并改善了细胞活力.
结论:
- 乙醇通过氧化应激和线粒体功能障碍对W. anomalus产生毒性.
- 抗氧化剂对乙醇诱导的细胞损伤提供了显著的保护.
- 这些发现支持开发抗氧化剂增强的酵母菌株,以改善工业发酵.
相关概念视频
Microbial Fermentation
1.3K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
1.3K
Fermentation
128.6K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
128.6K
Electron Transport Chain: Complex I and II
18.4K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
18.4K


