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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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相关实验视频

Updated: Jun 25, 2025

Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts
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在组织衰老期间的母体体转录组动力学.

Zulfiya G Guvatova1,2, Anastasiya A Kobelyatskaya1, Eveline R Kudasheva2

  • 1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia.

Life (Basel, Switzerland)
|May 25, 2024
PubMed
概括
此摘要是机器生成的。

这项研究揭示了人类组织中细胞外基因表达 (ECM) 基因表达的与年龄相关的变化. 这些母体体转录组动态显示了组织特异性模式和性别差异,为衰老和ECM研究提供了洞察力.

关键词:
在RNA-Seqq.衰老的衰老 衰老的衰老细胞外矩阵是细胞外矩阵.基因表达的基因表达方式一个母体组的母体组.组织衰老 组织衰老转录组 (transcriptome) 是一个转录组.

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科学领域:

  • 生物化学 生物化学
  • 分子生物学分子生物学
  • 老年学是一门学科.

背景情况:

  • 细胞外基质 (ECM) 提供结构支持,对组织平衡和修复至关重要.
  • ECM重塑的失调与衰老和各种疾病有关.

研究的目的:

  • 在多个人体组织中研究母体体转录组的年龄相关变化.
  • 识别与年龄相关的表达模式的特定ECM基因和相关蛋白质.

主要方法:

  • 利用了来自基因型-组织表达 (GTEx) 项目的基因表达数据.
  • 集成数据与MatrisomeDB 2.0,一个ECM蛋白质知识数据库.
  • 进行了差异基因表达 (DE) 分析,以确定特定于年龄和性别的变化.

主要成果:

  • 确定了许多具有组织特异性年龄依赖表达特征的母体基因.
  • 突出了多种组织中常见的DE母体基因,包括COL18A1,MFAP1,IGFBP7等.
  • 在衰老过程中揭示了母体体基因表达的性别特异性.

结论:

  • 这项研究阐明了人类衰老期间母体体转录组的复杂动力学.
  • 这些发现有助于理解ECM在组织衰老和疾病中的作用.
  • 结果可能会为未来的ECM研究和治疗开发提供信息.