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Related Concept Videos

Induced Pluripotent Stem Cells01:13

Induced Pluripotent Stem Cells

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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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Induced Pluripotent Stem Cells01:13

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Induced Pluripotent Stem Cells01:06

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Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
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iPS Cell Differentiation01:22

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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Somatic to iPS Cell Reprogramming01:29

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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Chemical Reversion of Conventional Human Pluripotent Stem Cells to a Naïve-like State with Improved Multilineage Differentiation Potency
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Understanding the roadmaps to induced pluripotency.

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Reprogramming somatic cells into induced pluripotent stem cells (iPSCs) can be achieved using transcription factors or small molecules. Research reveals iPSCs have varying immunogenicity, guiding efforts to improve clinical applications.

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Area of Science:

  • Stem cell biology
  • Cellular reprogramming
  • Developmental biology

Background:

  • Somatic cells can be reprogrammed into induced pluripotent stem cells (iPSCs) via transcription factors (Oct4, Sox2, Klf4, cMyc).
  • Small molecules can also induce pluripotency, highlighting the role of intrinsic cell signaling pathways in cell fate determination.
  • The pluripotent state represents a delicate balance between opposing differentiation forces.

Purpose of the Study:

  • To explore the mechanisms and stages of cellular reprogramming.
  • To investigate the immunogenicity of cells derived from induced pluripotent stem cells (iPSCs).
  • To identify strategies for minimizing reprogramming abnormalities and enhancing efficiency for clinical use.

Main Methods:

  • Ectopic expression of key transcription factors (Oct4, Sox2, Klf4, cMyc).
  • Application of small-molecule compounds to induce pluripotency.
  • Analysis of reprogramming stages and pathways.
  • Transplantation studies using mouse iPSC-derived cells.

Main Results:

  • Cell fate can be manipulated by targeting intrinsic cell signaling pathways.
  • Reprogramming involves a complex, multi-stage process akin to reverse development.
  • Mouse iPSC-derived cells exhibited variable immunogenicity in transplantation studies.

Conclusions:

  • Cellular reprogramming is a nuanced process influenced by both genetic and small-molecule interventions.
  • Understanding the stages and balance of differentiation forces is crucial for efficient reprogramming.
  • Addressing the immunogenicity of iPSC-derived cells is key for their successful clinical translation.