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Cytoskeletal Coordination in Cell Migration01:32

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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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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 the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...
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The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
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Kinetic Measurement and Real Time Visualization of Somatic Reprogramming
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How Tets and cytoskeleton dynamics MET in reprogramming.

Laurent David1, Calley L Hirsch2

  • 1INSERM, UMR 1064, 44093 Nantes Cedex 1, France; Faculté de Médecine, Université de Nantes, 44035 Nantes Cedex 1, France; iPSC Core Facility, SFR F. Bonamy, Université de Nantes, France.

Cell Stem Cell
|April 8, 2014
PubMed
Summary
This summary is machine-generated.

Tet enzymes promote mesenchymal-to-epithelial transition during cell reprogramming. Kinase-dependent cytoskeletal organization, however, blocks this crucial morphological transformation, revealing new insights into cellular plasticity.

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Area of Science:

  • Stem cell biology
  • Cellular reprogramming
  • Epigenetics

Background:

  • Mesenchymal-to-epithelial transition (MET) is a key process in cellular reprogramming.
  • Understanding the molecular mechanisms regulating MET is crucial for efficient cell fate conversion.

Purpose of the Study:

  • To elucidate the roles of Tet enzymes and cytoskeletal organization in regulating MET during reprogramming.
  • To identify factors that promote or inhibit MET.

Main Methods:

  • Investigated the function of Tet enzymes in MET using genetic manipulation.
  • Analyzed the impact of kinase-dependent cytoskeletal organization on MET.
  • Utilized cell morphology and gene expression analysis.

Main Results:

  • Tet enzymes were found to promote the mesenchymal-to-epithelial transition.
  • Kinase-dependent cytoskeletal organization was identified as an inhibitor of MET.
  • These findings reveal a dual regulation of MET during reprogramming.

Conclusions:

  • Tet enzymes are critical drivers of MET in cellular reprogramming.
  • Cytoskeletal dynamics, regulated by kinases, act as a barrier to MET.
  • This study provides a deeper understanding of the complex mechanisms governing cell plasticity.