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Tgf-Beta signaling in development

Krit Kitisin1, Tapas Saha, Tiffany Blake

  • 1Laboratory of Cancer Genetics and Digestive Diseases, Department of Surgery, and Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20007, USA.

Science'S STKE : Signal Transduction Knowledge Environment
|August 19, 2007
PubMed

Insights

The transforming growth factor-beta (TGF-beta) superfamily and bone morphogenetic proteins (BMPs) are crucial for stem cell fate and tumor suppression. Their combined signaling precisely defines stem cell commitment and influences cancer progression.

Area of Science:

  • Cellular and Molecular Biology
  • Developmental Biology
  • Cancer Research

Background:

  • The transforming growth factor-beta (TGF-beta) superfamily includes nearly 30 growth and differentiation factors, such as TGF-betas, activins, inhibins, and bone morphogenetic proteins (BMPs).
  • Multiple TGF-beta superfamily members play critical roles in regulating embryonic stem (ES) cell biology, including fate commitment, self-renewal, and differentiation.
  • These factors also exhibit significant roles in tumor suppression and can influence cancer progression.

Purpose of the Study:

  • To integrate and describe the signaling pathways activated by TGF-beta, BMPs, nodal, and activin in mammalian development.
  • To elucidate the precise mechanisms by which these signaling pathways define stem cell fate commitment.
  • To highlight the role of these signaling pathways in cancer suppression and progression as potential therapeutic targets.

Main Methods:

  • Integration of signaling pathways from TGF-beta, BMP, nodal, and activin using the Database of Cell Signaling's Connections Map Pathway.
  • Analysis of evidence primarily from studies on mouse and human embryonic stem cells.
  • Inclusion of data from mouse knockout studies to understand in vivo functions.

Main Results:

  • TGF-beta superfamily members exhibit diverse roles, inhibiting hematopoietic progenitor proliferation, promoting neural precursor lineage commitment, and suppressing epithelial tumors.
  • BMPs block neural differentiation in mouse and human ES cells, support mouse ES cell self-renewal, and contribute to tumor suppression.
  • The intricate cross-talk among intracellular signaling pathways activated by these ligands precisely defines stem cell fate commitment.

Conclusions:

  • The combined signaling of TGF-beta superfamily members, including BMPs, nodal, and activin, is fundamental to mammalian development and stem cell biology.
  • Understanding these complex signaling networks is crucial for deciphering stem cell fate and identifying molecular effectors involved in cancer.
  • These signaling pathways represent potential therapeutic targets for cancer intervention, either for suppression or to modulate progression.

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