相关实验视频
Updated: Jul 24, 2025

10:28
Author Spotlight: RNAi Inheritance and ChIP in C. elegans
Published on: May 5, 2023
3.9K
表观遗传遗传和跨代环境正义
Alexandra A Korolenko1, Samantha E Noll2, Michael K Skinner1
1Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA, USA.
The Yale journal of biology and medicine
|July 3, 2023
概括
环境中有毒物质对后代的伤害比直接暴露的更大,通过表观遗传影响健康. 这突显了关于祖先暴露和公平保护的环境正义问题的关键问题.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 遗传学 是一个遗传学.
背景情况:
- 每天向环境释放的化学物质和有毒物质对人类健康构成风险.
- 农业化合物虽然对作物生产有好处,但可能导致不良健康结果,包括生殖问题.
- 一些在欧盟被禁止的化学品仍在美国使用,这引发了监管和健康方面的担忧.
研究的目的:
- 调查有毒物质对直接暴露的人群和跨世代人群的影响差异.
- 检查表观遗传在代际毒性影响中介作用的作用.
- 为了强调环境正义的重要性,在祖先的毒性暴露的背景下.
主要方法:
- 审查有关有毒物质暴露和健康影响的现有研究.
- 对专注于表观遗传遗传机制的研究进行分析.
- 检查环境正义概念与代际健康差异的关系.
主要成果:
- 毒性物质通常对跨代 (祖先) 的人口表现出更深远的影响,而不是对直接暴露的代人.
- 表观遗传在毒剂引起的健康影响在几代人之间传播方面发挥着至关重要的作用.
- 对直接暴露的人群的研究优先考虑可能会忽视后代的重大长期健康负担.
结论:
- 跨代暴露于有毒物质是一个重要的环境正义问题,因为未来几代人可能会遭受健康后果,而不会从生产过程中受益.
- 当前的研究范式可能无法充分解决环境毒素的长期,代际影响.
- 迫切需要考虑环境正义原则,以保护未来几代人免受祖先暴露于有害化学物质造成的不成比例的伤害.
相关概念视频
Gene-Environment Interactions
367
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
367
Genomic Imprinting and Inheritance
34.7K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
34.7K
Epigenetic Regulation
3.1K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.1K
Inheritance of Chromatin Structures
6.3K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.3K
Inheritance
425
Gregor Mendel's pioneering work on the principles of inheritance fundamentally transformed our understanding of how traits are transmitted from generation to generation. His experiments with pea plants laid the groundwork for the discovery of genes, discrete units within organisms that control heredity.
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype...
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype...
425
Background and Environment Affect Phenotype
6.6K
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...
6.6K

