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Related Concept Videos

Stem Cell Niche01:26

Stem Cell Niche

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...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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...
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
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Tissue Renewal without Stem Cells

After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
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The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...

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Updated: May 7, 2026

Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans
09:18

Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans

Published on: September 7, 2021

Proteostasis and aging of stem cells.

David Vilchez1, Milos S Simic2, Andrew Dillin3

  • 1Molecular and Cell Biology Department, The University of California, Berkeley, Li Ka Shing Center For Biomedical and Health Sciences, Berkeley, CA 94720, USA; Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), Institute for Genetics, University of Cologne, Zülpicher Strasse 47a, 50674 Cologne, Germany.

Trends in Cell Biology
|October 8, 2013
PubMed
Summary

Maintaining proteostasis, or protein balance, is crucial for slowing aging and preventing age-related diseases. This review explores how proteostasis in stem cells impacts organismal aging and age-related decline.

Keywords:
agingproteostasisstem cellsstress responses

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Area of Science:

  • Gerontology
  • Cell Biology
  • Molecular Biology

Background:

  • Protein accumulation, particularly misfolded or damaged proteins, is a key factor in aging.
  • Proteostasis mechanisms are vital for slowing aging and reducing age-related diseases.
  • Adult stem cell function declines with age, contributing to tissue degeneration.

Purpose of the Study:

  • To review new insights into stem cell aging.
  • To explore the role of proteostasis in stem cell aging.
  • To discuss the implications of proteostasis for organismal aging.

Main Methods:

  • This is a review article, synthesizing existing research.
  • It discusses findings related to protein accumulation in stem cells.
  • It examines the link between proteostasis and stem cell function.

Main Results:

  • Stem cell aging is linked to the accumulation of damaged proteins.
  • Compromised proteostasis in stem cells can affect development and aging.
  • Proteostasis maintenance in stem cells is critical for organismal aging.

Conclusions:

  • Proteostasis in stem cells plays a significant role in organismal aging.
  • Further research into stem cell aging and proteostasis is warranted.
  • Understanding these mechanisms may lead to interventions for age-related diseases.