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Related Experiment Videos

Hedgehog signalling in foregut malignancy.

D N Watkins1, C D Peacock

  • 1School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21231, USA. nwatkins@jhmi.edu

Biochemical Pharmacology
|August 18, 2004
PubMed
Summary
This summary is machine-generated.

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Hedgehog (Hh) signaling is crucial for cancer stem cell fate. Inhibiting Hh signaling with cyclopamine effectively reduces growth in small cell lung cancer and other aggressive malignancies.

Area of Science:

  • Developmental Biology
  • Oncology
  • Molecular Signaling

Background:

  • Hedgehog (Hh) signaling regulates axial patterning and stem cell fate during development.
  • Sonic, Desert, and Indian Hedgehogs mediate Hh signaling through morphogen gradients.
  • Aberrant, ligand-dependent Hh signaling occurs in small cell lung cancer (SCLC) and upper gastrointestinal cancers, independent of PATCHED mutations.

Purpose of the Study:

  • To investigate the role of Hh signaling in SCLC and foregut-derived malignancies.
  • To assess the therapeutic potential of Hh pathway inhibition in these cancers.
  • To propose a novel therapeutic strategy targeting Hh-dependent tumors.

Main Methods:

  • Utilized cyclopamine, a natural plant alkaloid inhibitor of Hh signaling.

Related Experiment Videos

  • Evaluated the effects of cyclopamine on cancer cell growth in vitro.
  • Assessed the in vivo efficacy of cyclopamine in relevant tumor models.

    • Main Results:

    • Cyclopamine demonstrated potent inhibition of SCLC growth.
    • Cyclopamine effectively suppressed the growth of various foregut-derived malignancies.
    • These findings confirm an ongoing requirement for Hh signaling in these aggressive tumors.

    Conclusions:

    • Aberrant Hh signaling is a conserved mechanism for establishing stem cell fates in cancer, driving malignant transformation and metastasis.
    • Pharmacologic targeting of the Hh pathway with potent antagonists represents a promising therapeutic strategy for Hh-dependent tumors.