相关实验视频
Updated: Jul 9, 2026
05:41
Metabolic Profile Analysis of Zebrafish Embryos
Published on: January 14, 2013
20.1K
随着对恒定高温和热变化的发展暴露,斑马鱼 (Danio rerio) 的微RNA表达和性能发生了改变
Sana Gavarikar1, Paul M Craig1
1Department of Biology, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada.
概括
早期暴露于波动的温度有助于鱼通过表观遗传变化管理新陈代谢,但可能会降低长期的耐热性.
科学领域:
- 环境表观遗传学环境表观遗传学
- 水生物质毒理学研究
- 鱼类的气候变化适应
背景情况:
- 由于气候变化,鱼类面临越来越多的热波动.
- 表观遗传机制,如microRNAs (miRNAs),可能有助于鱼适应温度变化.
- 了解这些适应对于预测鱼类生存和种群动态至关重要.
研究的目的:
- 研究表观遗传调节器 (miRNAs) 在缓冲斑马鱼对天热波动的作用.
- 评估本体遗传热变异性对斑马鱼生理和热耐受性的短期和长期影响.
- 探索代谢补偿和压力恢复之间的潜在权衡.
主要方法:
- 斑马鱼 (Danio rerio) 在早期发育过程中暴露于不断控制,波动或升高的温度.
- 测量了特定miRNA和热冲击蛋白 (HSP) 的生存,新陈代谢和表达.
- 在成年期评估了对大脑miRNA表达和热耐受性 (CTmax) 的长期影响.
主要成果:
- 高温降低了生存率,但波动的温度没有,表明缓冲效应.
- 波动和升高的温度都诱导了代谢补偿,在波动的条件下更明显.
- 与线粒体功能相关的miR-181a-5p在波动的条件下被上调,这表明它在代谢适应中的作用.
- 这种miRNA在发展史波动的成年人中仍然升高,尽管热耐受性没有增强.
结论:
- 早期暴露于波动的温度会导致斑马鱼的长期表观遗传修饰.
- 这些变化似乎在短期内优化了代谢性能.
- 然而,这种适应可能以减少未来耐热性和应力恢复能力为代价.
- 表观遗传可塑性在鱼类适应不断变化的热环境方面发挥着重要作用.
相关概念视频
02:27Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
01:11Testing a Claim about Mean: Known Population SD
A complete procedure of testing the hypothesis about a population mean is explained here.
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...