列病调节毒素配置和高激活caspase-3/7 在Gymnodinium catenatum中
Leyberth José Fernández-Herrera1, Tania Zenteno-Savín2, Ignacio Leyva-Valencia3
1Instituto Politécnico Nacional. Centro Interdisciplinario de Ciencias Marinas (IPN-CICIMAR), La Paz, B.C.S, 23096, Mexico; Centro de Investigaciones Biológicas del Noroeste, La Paz, B.C.S, 23096, Mexico.
Protist
|August 19, 2025
概括
有害的藻类繁殖 (HAB) 种类Gymnodinium catenatum在接触其他植物浮游生物时显示出增长减缓和毒素配置的改变. 直接的细胞接触加剧了这些等位细胞效应,表明被编程的细胞死亡诱导.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 物理学的生理学
背景情况:
- 基病症显著影响植物浮游生物群落结构.
- 有害藻类繁殖 (HABs) 构成生态和经济威胁.
- Gymnodinium catenatum是一种已知的形成HAB的物种,产生麻毒素.
研究的目的:
- 为了研究G. catenatum与C. marina和G. impudicum的等位基相互作用.
- 评估G. catenatum对生长,细胞形态,毒素概况和编程细胞死亡 (PCD) 的影响.
- 确定直接细胞接触在这些等位基反应中的作用.
主要方法:
- 在72小时内与C. marina和G. impudicum混合培养中培养G. catenatum.
- 评估生长速度,细胞形态和毒素含量.
- 测量卡斯帕斯3/7活动作为PCD的指标.
- 对毒素概况的分析,包括特定的亚毒素 (GTX2.3),脱卡巴尔亚毒素 (dcGTX2.3) 和B1类似物.
主要成果:
- G. catenatum的生长被C. marina和G. impudicum显著抑制,有或没有直接的细胞接触.
- 在G. catenatum中毒素含量下降,而卡斯帕斯3/7活动增加,表明PCD诱导.
- 观察到毒素配置的变化,增加了特定的gonyautoxins及其类型的水平.
- 直接的细胞接触,特别是与C. marina,导致最明显的等位细胞效应.
结论:
- G. catenatum对同时出现的植物浮游生物物种表现出显著的等位基反应.
- 由G.catenatum引起的列病导致生长限制,毒素产生的代谢变化和PCD的诱导.
- 直接的细胞接触放大了等位细胞的影响,提供了对HAB物种相互作用的见解.
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