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Related Concept Videos

Regulation of Hematopoietic Stem Cells01:01

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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...
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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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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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Commitment is the  process whereby stem cells:
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Hematopoiesis01:21

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The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
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Identification of Key Factors Regulating Self-renewal and Differentiation in EML Hematopoietic Precursor Cells by RNA-sequencing Analysis
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RNA Modifications Shape Hematopoietic Stem Cell Aging: Beyond the Code.

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Aging hematopoietic stem cells (HSCs) show myeloid bias and reduced lymphopoiesis due to RNA changes. Epitranscriptomic mechanisms are crucial for age-related hematopoietic stem cell dysfunction.

Keywords:
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Area of Science:

  • Hematology
  • Molecular Biology
  • Aging Research

Background:

  • Hematopoietic stem cell (HSC) aging involves niche degeneration.
  • Aging leads to myeloid lineage bias, reduced lymphopoiesis, and bone marrow fat deposition.

Purpose of the Study:

  • To investigate the role of RNA alterations in HSC aging.
  • To understand the contribution of epitranscriptomic mechanisms to age-related hematopoietic dysfunction.

Main Methods:

  • Analysis of RNA splicing and editing in aged HSCs.
  • Assessment of lineage-specific differentiation and inflammatory responses.

Main Results:

  • Alterations in RNA splicing and editing were observed in aged HSCs.
  • These RNA changes correlate with increased myeloid lineage skewing.
  • Age-related HSC dysfunction involves inflammation-responsive transcription factors.

Conclusions:

  • Epitranscriptomic mechanisms are critical in the aging of the hematopoietic system.
  • RNA modifications contribute significantly to the age-related myeloid bias and inflammation.