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Related Concept Videos

Small GTPases - Ras and Rho01:24

Small GTPases - Ras and Rho

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Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
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Cell Polarization by Rho Proteins01:21

Cell Polarization by Rho Proteins

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Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
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Cancer Cell Migration through Invadopodia01:35

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Invadosome is a broad category of cell surface structures with proteolytic activity that  degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However,...
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The Ras Gene02:38

The Ras Gene

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The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a...
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Cell Migration01:19

Cell Migration

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Cell Migration01:09

Cell Migration

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Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
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Related Experiment Video

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RhoC GTPase Activation Assay
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Rab5 activation as a tumor cell migration switch.

Pablo Mendoza1, Jorge Díaz2, Patricio Silva1

  • 1Institute for Research in Dental Sciences; Faculty of Dentistry; Universidad de Chile; Santiago, Chile.

Small Gtpases
|April 3, 2014
PubMed
Summary
This summary is machine-generated.

Rab5 activation is key for metastatic cancer cell migration by promoting focal adhesion disassembly. Understanding this mechanism offers new insights into cancer cell metastasis and potential therapeutic targets.

Keywords:
Rab5cell migrationfocal adhesion disassemblymetastasis

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Area of Science:

  • Cell Biology
  • Cancer Research
  • Molecular Biology

Background:

  • Metastatic cancer cells exhibit increased migration, driven by altered signal transduction pathways.
  • Intracellular vesicular trafficking, particularly endocytosis, is crucial for cell migration by regulating membrane receptors and signaling.
  • The Rab family of small GTPases plays a central role in endosome dynamics, cell migration, and invasion.

Approach:

  • Investigated the role of Rab5 activation in cancer cell migration and invasion.
  • Focused on the connection between Rab5 and focal adhesion disassembly.
  • Examined the mechanisms underlying Rab5's function in promoting metastasis.

Key Points:

  • Rab5 activation is essential for the disassembly of focal adhesions.
  • Focal adhesion disassembly is a critical event that accompanies cancer cell migration and invasion.
  • Endocytosis and integrin trafficking are key processes influenced by Rab proteins.

Conclusions:

  • Rab5 activation is a crucial event promoting focal adhesion disassembly in metastatic cancer cells.
  • Elucidating the mechanisms of Rab5's role in metastasis can provide novel therapeutic strategies.
  • Further research into Rab5 function is needed to fully understand its impact on cancer cell metastasis.