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Related Concept Videos

Stem Cell Culture01:17

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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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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...
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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...
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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood 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...
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Isolating Intestinal Stem Cells from Adult Drosophila Midguts by FACS to Study Stem Cell Behavior During Aging
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Intestinal Stem Cell Aging: Origins and Interventions.

Heinrich Jasper1

  • 1Immunology Discovery, Genentech, Inc., South San Francisco, California 94080, USA;

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PubMed
Summary
This summary is machine-generated.

Aging impairs intestinal stem cell regeneration in both flies and mammals. This review models age-related decline in fly intestines and explores molecular mechanisms affecting mammalian stem cell function.

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Area of Science:

  • Gastrointestinal (GI) physiology
  • Stem cell biology
  • Aging research

Background:

  • The gastrointestinal (GI) epithelium requires continuous regeneration, primarily driven by intestinal stem cells (ISCs), to maintain tissue function and organismal health.
  • ISC activity is tightly regulated by intrinsic, local, and systemic cues to match regenerative output with tissue demands.
  • Age-related decline in these regulatory mechanisms disrupts intestinal homeostasis, impacting overall health.

Purpose of the Study:

  • To present a comprehensive model for age-related regenerative decline in the *Drosophila melanogaster* intestine.
  • To discuss emerging molecular mechanisms underlying the age-related decline of mammalian intestinal stem cell function.
  • To bridge findings from insect models to mammalian systems for a unified understanding of GI aging.

Main Methods:

  • Review of existing literature on intestinal stem cell biology in *Drosophila melanogaster* and mammalian models.
  • Analysis of studies investigating age-related changes in stem cell regulation and tissue regeneration.
  • Synthesis of data to propose a model for age-related regenerative decline.

Main Results:

  • Age-related decline in ISC function leads to perturbed intestinal homeostasis.
  • Specific molecular pathways governing ISC regulation are identified as key contributors to age-related decline.
  • Comparative analysis highlights conserved mechanisms of regenerative decline across species.

Conclusions:

  • Understanding age-related regenerative decline in the fly intestine provides a valuable framework for studying mammalian GI aging.
  • Molecular insights from *Drosophila* are beginning to illuminate mechanisms of mammalian intestinal stem cell aging.
  • Targeting these mechanisms holds potential for interventions to improve gut health in aging populations.