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Related Concept Videos

Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby 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...
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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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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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Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
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Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
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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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Deciphering Transcriptomic Variations in Hematopoietic Lineages: HSCs, EBs, and MKs.

Swati Dahariya1, Anton Enright2, Santosh Kumar1

  • 1Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500019, Telangana, India.

International Journal of Molecular Sciences
|September 28, 2024
PubMed
Summary
This summary is machine-generated.

This study reveals novel long noncoding RNAs (lncRNAs) involved in blood cell development. Discovering these genetic factors in hematopoietic stem cells (HSCs), erythroblasts (EBs), and megakaryocytes (MKs) enhances understanding of cell-fate specification.

Keywords:
hematopoiesishematopoietic lineageslncRNAstranscriptome

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Area of Science:

  • Hematopoiesis and Stem Cell Biology
  • Genomics and Transcriptomics
  • Molecular Biology and Genetics

Background:

  • Hematopoietic stem cells (HSCs) are crucial for generating all blood cell types.
  • Genetic variations play a significant role in regulating blood cell development and differentiation.
  • Understanding the genetic basis of cell-fate transitions in hematopoiesis is essential.

Purpose of the Study:

  • To investigate the genetic factors governing cell-fate transitions in human hematopoietic cells.
  • To perform a comprehensive transcriptomic analysis of hematopoietic stem cells (HSCs), erythroblasts (EBs), and megakaryocytes (MKs).
  • To identify novel genetic variants, gene expression changes, and epigenetic modifications in these cell types.

Main Methods:

  • Transcriptomic analysis of diverse hematopoietic cell datasets from healthy individuals (The BLUEPRINT consortium).
  • Identification of genetic variants affecting gene expression and epigenetic modifications.
  • Comparative analysis of mRNA and long noncoding RNA (lncRNA) expression patterns across HSCs, EBs, and MKs.

Main Results:

  • Identified 31,074 transcripts, including 14,233 novel long noncoding RNAs (lncRNAs).
  • Discovered 2845 differentially expressed (DE) mRNAs and 354 DE lncRNAs among HSCs, EBs, and MKs.
  • Characterized lncRNAs with preferential expression in HSCs and differentiated progenitors, revealing their role in cell-fate specification and cell-to-cell variation.

Conclusions:

  • The study highlights a substantial reservoir of novel lncRNAs with significant roles in human hematopoiesis.
  • lncRNA dynamics are critical regulators of differentiation and cell-fate specification in hematopoietic cells.
  • Comparative transcriptomic analysis provides insights into the distinct genetic signatures driving hematopoietic cell differentiation.