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Related Concept Videos

Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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...
Hematopoiesis01:21

Hematopoiesis

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...
Overview of Hematopoiesis01:20

Overview of Hematopoiesis

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).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

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Retroviral Infection of Murine Embryonic Stem Cell Derived Embryoid Body Cells for Analysis of Hematopoietic Differentiation
11:40

Retroviral Infection of Murine Embryonic Stem Cell Derived Embryoid Body Cells for Analysis of Hematopoietic Differentiation

Published on: October 20, 2014

MicroRNAs and hematopoietic cell development.

Ryan M O'Connell1, David Baltimore

  • 1Division of Microbiology and Immunology, Department of Pathology, University of Utah, Salt Lake City, Utah, USA.

Current Topics in Developmental Biology
|February 28, 2012
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) are emerging as key regulators in mammalian hematopoietic development. Understanding these noncoding RNAs offers new insights into blood cell formation and related diseases.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Hematopoiesis is crucial for blood cell production, vital for oxygen transport, immunity, and clotting.
  • Dysregulation of hematopoietic processes is implicated in major diseases like cancer, anemia, and autoimmune disorders.
  • While protein factors are known regulators, novel regulatory mechanisms in hematopoiesis are being explored.

Purpose of the Study:

  • To review the role of microRNAs (miRNAs) in mammalian hematopoietic development.
  • To elucidate how miRNAs contribute to the molecular control networks of blood cell formation.
  • To discuss the implications of miRNA pathway aberrations in disease pathogenesis.

Main Methods:

  • Literature review of current research on miRNAs and hematopoiesis.
  • Analysis of studies investigating miRNA function in blood cell lineage specification.
  • Synthesis of findings on miRNA regulatory networks in normal and diseased states.

Main Results:

  • MicroRNAs (miRNAs) represent a significant layer of regulation in hematopoietic development.
  • Aberrant miRNA activity is linked to various hematological diseases.
  • miRNAs provide novel molecular insights into blood cell differentiation and function.

Conclusions:

  • MicroRNAs are integral to understanding the complexities of hematopoiesis.
  • Targeting miRNA pathways may offer therapeutic strategies for hematological disorders.
  • Further research into miRNAs will deepen our knowledge of blood development and disease.