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Related Concept Videos

Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Replicative Cell Senescence02:15

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Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
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The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
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The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
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A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
Adult stem cells
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Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...

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Related Experiment Video

Updated: Jun 5, 2026

Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells
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Vibrational phenomics decoding of the stem cell stepwise aging process at single-cell resolution.

Yue Wang1,2,3, Yadi Wang2, Xueling Li4

  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.

Chemical Communications (Cambridge, England)
|February 23, 2024
PubMed
Summary

Vibrational spectroscopy quantifies aging stem cell heterogeneity at the single-cell level. This reveals a stepwise aging process in human mesenchymal stem cells with distinct subtypes.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Gerontology

Background:

  • Cellular senescence is a key driver of aging.
  • Stem cell aging contributes to age-related functional decline.
  • Understanding stem cell heterogeneity during aging is crucial.

Purpose of the Study:

  • To quantitatively measure phenotypic heterogeneity of senescent stem cells during aging.
  • To characterize phenotypic changes in human mesenchymal stem cells (MSCs) across aging stages.
  • To identify distinct stem cell subtypes associated with aging.

Main Methods:

  • Application of vibrational spectroscopy for single-cell analysis.
  • Utilizing serially passaged human mesenchymal stem cells (MSCs) as an aging model.
  • Phenotypic characterization of MSCs at different aging stages.

Main Results:

  • Vibrational spectroscopy enables quantitative assessment of senescent stem cell heterogeneity.
  • A stepwise aging process was identified in human MSCs.
  • Several distinct stem cell subtypes were discovered during the aging process.

Conclusions:

  • Vibrational spectroscopy is a powerful tool for studying stem cell aging.
  • Stem cell aging is a complex process involving distinct phenotypic subtypes.
  • These findings provide insights into the mechanisms of aging and potential therapeutic targets.