Stem Cell Self-renewal
Stem Cell Self-renewal - Related Videos
01:23
Tissue Renewal without Stem Cells
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2023
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. However, failure of such a system...
01:23
Renewal of Intestinal Stem Cells
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2023
The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the goblet,...
01:12
Renewal of Skin Epidermal Stem Cells
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2023
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...
08:01
Oct4GiP Reporter Assay to Study Genes that Regulate Mouse Embryonic Stem Cell Maintenance and Self-renewal
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Cited by 7 •
2012
We describe a fluorescence reporter assay to quickly identify and characterize genes that regulate mouse embryonic stem cell maintenance and self-renewal.
01:12
Role Of Notch Signalling In Intestinal Stem Cell Renewal
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2023
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells. Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
FAQs
Signals from the cellular niche help regulate whether a dividing stem cell population maintains its identity or produces differentiating progeny. This local control connects stem cell behavior with tissue requirements, allowing renewal to support development and ongoing tissue maintenance. Changes in these signals can therefore alter the balance between preserving stem cells and generating specialized cells.
Transcriptional and epigenetic regulation provide internal control over the cell state associated with renewal. Together with niche-derived signals, these regulatory layers help preserve stem cell identity during division and influence whether daughter cells remain within the renewable population. Their involvement shows that self-renewal depends on coordinated gene-control mechanisms, rather than division alone.
Symmetric self-renewal can expand the stem cell pool, whereas asymmetric division maintains one stem cell while producing a differentiating progenitor. The balance between these outcomes determines whether a tissue increases its reserve of stem cells or generates cells needed for development and maintenance. Understanding this balance is central to interpreting changes in tissue renewal.
Cancer formation is one context in which stem cell self-renewal becomes especially important. Studying how the renewal balance is controlled can help connect persistent stem cell populations with abnormal tissue behavior. The same mechanisms that preserve a renewable cell pool during normal biology therefore provide a framework for investigating how disrupted self-renewal may relate to cancer.
Analysis of self-renewal helps explain how stem cell populations are preserved while tissues develop and remain functional. It connects cellular division patterns with the production of differentiating progenitors, making it possible to examine how renewal supports both early biological development and continued tissue maintenance. These insights also provide context for understanding regeneration.
Stem cell self-renewal is relevant to regenerative medicine, disease modeling, and stem cell-based therapies because these applications depend on understanding how renewable cell populations are maintained. Knowledge of the controlling signals and regulatory processes can help researchers interpret stem cell behavior in experimental systems and evaluate how renewal relates to tissue regeneration or disease formation.