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Stem Cell Niche

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...

Multipotency of Hematopoietic Stem Cells

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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...

Multipotency and Niche of Bulge Stem Cell

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A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...

Adult Stem Cells

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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously renew...

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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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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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Related Experiment Video

Updated: May 19, 2026

Single Myofiber Culture Assay for the Assessment of Adult Muscle Stem Cell Functionality Ex Vivo

Single Myofiber Culture Assay for the Assessment of Adult Muscle Stem Cell Functionality Ex Vivo

Published on: February 15, 2021

Niche science: the aging stem cell.

Heinrich Jasper¹, Brian K Kennedy

¹Buck Institute for Research on Aging, Novato, CA, USA. HJasper@buckinstitute.org

Cell Cycle (Georgetown, Tex.)

|August 29, 2012

Summary

This summary is machine-generated.

Stem cell aging research reveals molecular causes of declining regeneration. This provides new understanding for developing therapies to reverse aging and restore youthful function.

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Area of Science:

Gerontology
Stem Cell Biology
Molecular Biology

Background:

Stem cell aging is a key factor in age-related functional decline.
Understanding the molecular basis of stem cell aging is crucial for regenerative medicine.

Purpose of the Study:

To investigate the molecular mechanisms underlying stem cell aging.
To identify potential targets for rejuvenating therapies.

Main Methods:

Analysis of molecular pathways involved in stem cell senescence.
Comparative studies of young and aged stem cell populations.

Main Results:

Identification of specific molecular factors contributing to stem cell aging.
Demonstration of age-related changes in stem cell regenerative capacity.

Conclusions:

Stem cell aging involves complex molecular alterations.
These findings offer new avenues for developing rejuvenating therapies to combat age-related diseases.