海洋足动物的转录组反应对环境相关的萨克西托克辛度的反应
Yaolu Niu1, Hui Wei1, Yunlei Zhang1
1Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems/College of the Environment & Ecology, Xiamen University, Xiamen 361102, China.
Marine pollution bulletin
|June 13, 2024
概括
萨西托克辛 (STX) 是一种强大的神经毒素,它改变了足动物的基因表达,影响了新陈代谢和免疫反应. 这项研究强调了由于毒性和生物积累而导致海洋生态系统中性贝类毒素的风险.
科学领域:
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
- 分子生物学分子生物学
背景情况:
- 性贝类毒素 (PST) 是一种强大的神经毒素,威胁人类健康.
- 萨西托克辛 (STX) 是高度有毒的PST的一个主要例子.
- 足动物是海洋食物网的关键组成部分.
研究的目的:
- 为了研究STX暴露对Tigriopus japonicus.copepod的分子影响.
- 评估对STX.的度依赖的转录基因反应.
- 评估海洋生态系统中STX的潜在生态风险.
主要方法:
- 暴露Tigriopus japonicus在环境相关的STX度 (2.5和25μg/L) 中48小时.
- 转录组分析以确定基因表达变化.
- 对代谢,免疫和解毒路径的分析.
主要成果:
- 暴露于STX显著改变了度依赖的方式的copepod转录组.
- STX降低了新陈代谢,损害了免疫防御和排毒,并扰乱了信号传导.
- 观察到素代谢的抑制和变的中断;损伤修复途径被上调.
结论:
- 由于其毒性和生物积累潜力,STX对海洋生态系统构成重大风险.
- 转录基因变化表明,暴露于STX.的copepods中存在广泛的细胞破坏.
- 这项研究作为PST对沿海食物网的影响的早期警告.
相关概念视频
Responses to Salt Stress
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
Stringent Response in E. coli
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...


