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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.
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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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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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The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
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The Ras Gene02:38

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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.
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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 Díaz, Patricio Silva

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

Small Gtpases
|March 13, 2015
PubMed
Summary
This summary is machine-generated.

Rab5 activation promotes cancer cell migration and invasion by aiding focal adhesion disassembly. Understanding this mechanism is key to targeting metastatic cancer progression.

Keywords:
Rab5cell migrationfocal adhesion disassemblymetastasis

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Area of Science:

  • Cell Biology
  • Cancer Research
  • Molecular Biology

Background:

  • Metastatic cancer cell migration relies on altered signal transduction pathways.
  • Intracellular vesicular trafficking, particularly endocytosis, is crucial for cell migration.
  • Rab GTPases, including Rab5, are implicated in endosome dynamics and cell migration.

Purpose of the Study:

  • To investigate the role of Rab5 activation in promoting focal adhesion disassembly.
  • To elucidate the mechanisms underlying Rab5's function in cancer cell metastasis.

Main Methods:

  • Analysis of signal transduction pathways in metastatic cancer cells.
  • Investigating the role of endocytosis and integrin trafficking.
  • Studying the function of Rab GTPases, specifically Rab5 activation.

Main Results:

  • Rab5 activation is a critical event in promoting focal adhesion disassembly.
  • Focal adhesion disassembly is concomitant with cancer cell migration and invasion.
  • Endocytosis and receptor tyrosine kinase signaling fine-tuning are implicated.

Conclusions:

  • Rab5 activation plays a novel and crucial role in facilitating cancer cell migration and invasion.
  • Elucidating Rab5's mechanisms offers insights into cancer metastasis.
  • Targeting Rab5 function could be a strategy against metastatic cancer.