相关实验视频
Updated: Jun 24, 2025

10:36
Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
13.9K
基于背景的抗氧化剂防御系统 (ADS) 应激记忆,以应对同源的入侵物种中反复出现的环境挑战
Hanxi Li1,2, Xuena Huang1, Aibin Zhan1,2
1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085 China.
Marine life science & technology
|June 3, 2024
概括
海洋虫对盐度变化表现出不同的应激反应. 在生理上,C. savignyi具有更强的耐受性,而C. robusta具有更强的基因表达变化,并发展转录应激记忆.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 环境科学环境科学
背景情况:
- 由于气候变化和人类活动,海洋生态系统面临越来越多的环境波动.
- 海洋生物,特别是盆地生物,依赖于抗氧化防御系统 (ADS) 等策略来应对环境挑战.
- 了解ADS机制对于开发海洋物种适应性策略至关重要.
研究的目的:
- 为了比较两个入侵性虫物种,Ciona robusta和C. savignyi的生理和转录反应,以应对高盐度恢复的挑战.
- 研究抗氧化剂防御系统 (ADS) 在调解压力反应和压力记忆中的作用.
- 探索监管机制,包括Nrf2-Keap1通路,是差异性压力记忆形成的基础.
主要方法:
- 对生理和转录反应的比较分析.
- 对Ciona robusta和C. savignyi进行两轮超度恢复的暴露.
- 测量抗氧化剂防御系统 (ADS) 的组成部分,包括总超氧化物脱酶 (T-SOD) 和谷氨酸 (GSH).
- 转录分析侧重于超氧化物脱酶 (SOD) 异型和Nrf2-Keap1信号通路.
主要成果:
- 相比于Ciona robusta,Ciona savignyi表现出更高的生理耐受性和抵抗盐度压力的能力.
- 锡奥纳·罗布斯塔 (Ciona robusta) 呈现出增强的转录反应,并发展出转录应激记忆,与C. savignyi不同.
- 这两种物种都发展了生理压力记忆,由T-SOD和GSH水平的升高表明.
- 在两种物种之间观察到不同的转录反应,特别是在SOD异型和Nrf2-Keap1通路调节中.
结论:
- 这项研究支持了"上下文依赖的压力记忆假设",强调了不同监管层次的物种特异性压力记忆形成.
- Nrf2-Keap1通路的不同调节可能解释了Ciona robusta和C. savignyi之间转录应激记忆的差异.
- 这些发现提高了对海洋物种环境挑战管理机制的理解,特别是关于抗氧化剂防御系统的理解.
相关概念视频
Responses to Heat and Cold Stress
13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K
Stress Response System
88
The stress response system, also known as the fight-or-flight response, is the body's automatic physiological reaction to perceived threats. Hans Selye introduced the concept of General Adaptation Syndrome (GAS) to describe the predictable pattern of changes that occur in response to stress. GAS consists of three sequential stages: alarm, resistance, and exhaustion. This model helps explain how chronic stress can contribute to health problems.
Alarm stage
In the alarm stage, the body's...
Alarm stage
In the alarm stage, the body's...
88
Physiological Foundation of Stress
56
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Role of the Sympathetic Nervous System
Adrenaline triggers the...
56
Cells of the Adaptive Immune Response
980
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
980
Adaptations that Reduce Water Loss
25.5K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.5K
Psychological Responses to Stress
53
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
53

