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相关概念视频

Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

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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...
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Imprinting01:22

Imprinting

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Behavioral imprinting is observed in some newborn animals and occurs when they develop strong and specific attachments to another animal (usually a parent) following brief, early-life exposures. Offspring imprint onto parents within a brief period after birth or hatching; this time window is called the critical period. Once imprinting occurs, the bond established between the parents and their offspring is usually long-lasting.
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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Cellular Differentiation00:57

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How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
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Methods of Nuclear Reprogramming01:24

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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Embryonic Stem Cells00:58

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Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
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Cultivate Primary Nasal Epithelial Cells from Children and Reprogram into Induced Pluripotent Stem Cells
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胚胎发育过程中的早期生命编程如何打印细胞记忆

Norermi Firzana Alfian1, Kei Uechi1, Yoshiya Morishita1

  • 1Department of Integrated Applied Life Science, Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi, Kofu 400-0016, Japan.

International journal of molecular sciences
|January 10, 2026
PubMed
概括
此摘要是机器生成的。

细胞记忆是通过早期发育过程中的表观遗传修饰来建立的,它会影响成年人的健康和疾病. 了解这些早期暴露是预防长期代谢障碍的关键.

关键词:
哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈细胞内存的细胞内存.胚胎发生是胚胎发生.表观遗传遗传是表观遗传的继承.

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科学领域:

  • 表观遗传学和发育生物学

背景情况:

  • 细胞记忆,或表观遗传记忆,允许细胞保留超出DNA序列的信息.
  • 表观遗传机制维持了跨细胞分裂的专门细胞特征,这对于组织的认同和分化至关重要.

研究的目的:

  • 审查介导细胞记忆的表观遗传通路的进展.
  • 突出早期胚胎发生的脆弱窗口及其与成人健康的联系.
  • 识别发展干预措施的差距,以保护未来几代人.

主要方法:

  • 关于表观遗传机制的最新科学文献的审查.
  • 综合有关早期暴露及其长期健康影响的数据.
  • 对表观遗传修饰的分析,如DNA甲基化,基因素修饰和非编码RNAs.

主要成果:

  • 早期的胚胎暴露,包括辅助生殖技术和营养压力,可以建立表观遗传记忆.
  • 这种记忆将早期生活事件与成人表型联系起来,特别是代谢障碍.
  • 表观遗传修饰对于通过细胞分裂传递细胞记忆至关重要,在某些情况下,跨代.

结论:

  • 表观遗传记忆在健康和疾病的发育起源 (DOHaD) 中发挥着关键作用.
  • 存在关键的植入前窗口,干预措施可以减轻长期健康风险.
  • 需要进一步的研究来开发哺乳动物干预措施,利用表观遗传记忆来保护跨世代健康.