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Related Concept Videos

Metastasis02:30

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...

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Related Experiment Video

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A Preclinical Murine Model of Hepatic Metastases
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The "Sharp" blade against HIF-mediated metastasis.

Ivano Amelio1, Gerry Melino

  • 1Medical Research Council, Toxicology Unit, Leicester University, Leicester, UK.

Cell Cycle (Georgetown, Tex.)
|November 29, 2012
PubMed
Summary
This summary is machine-generated.

Hypoxia-inducible factors (HIFs) drive cancer growth and metastasis. Sharp-1 protein targets HIF1α for degradation, inhibiting cancer cell mobility and potentially reducing metastasis in triple-negative breast cancer.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cellular Biology

Background:

  • Hypoxia-inducible factors (HIFs) are crucial for cellular adaptation to low oxygen conditions.
  • Cancer cells exploit HIFs for survival, promoting metabolic reprogramming, proliferation, survival, and mobility.
  • Overexpression of HIFs in cancer is linked to increased metastasis and mortality.

Purpose of the Study:

  • To elucidate a novel regulatory mechanism of HIFs in triple-negative breast cancer.
  • To investigate the role of Sharp-1 in HIF1α degradation and its impact on cancer metastasis.

Main Methods:

  • Investigated the interaction between Sharp-1 and HIF1α.
  • Assessed the effect of Sharp-1 on HIF1α stability and proteasomal degradation.
  • Evaluated the impact of this interaction on cancer cell mobility and metastasis in a triple-negative breast cancer model.

Main Results:

  • Identified Sharp-1 as a regulator of HIF1α stability.
  • Demonstrated that Sharp-1 targets HIF1α for oxygen-independent proteasomal degradation.
  • Showcased Sharp-1's ability to counteract HIF-mediated cancer cell metastasis.

Conclusions:

  • Sharp-1 plays a critical role in regulating HIF1α levels and function.
  • This novel mechanism highlights Sharp-1 as a potential therapeutic target for inhibiting HIF-driven metastasis in triple-negative breast cancer.