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TGF - β Signaling Pathway

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...

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Related Experiment Video

Updated: May 9, 2026

Large-scale Gene Knockdown in C. elegans Using dsRNA Feeding Libraries to Generate Robust Loss-of-function Phenotypes

Large-scale Gene Knockdown in C. elegans Using dsRNA Feeding Libraries to Generate Robust Loss-of-function Phenotypes

Published on: September 25, 2013

TGF-β signaling in C. elegans.

Tina L Gumienny¹, Cathy Savage-Dunn

¹Department of Molecular and Cellular Medicine, Texas A&M Health Science Center College of Medicine, College Station, TX 77843, USA.

Wormbook : the Online Review of C. Elegans Biology

|August 3, 2013

Summary

Transforming Growth Factor-β (TGF-β) signaling in C. elegans involves five ligands. This review summarizes known canonical and noncanonical pathways for DBL-1, DAF-7, and UNC-129, and discusses their biological functions.

Area of Science:

Developmental Biology
Molecular Biology
Cell Signaling

Background:

Transforming Growth Factor-β (TGF-β) superfamily ligands are crucial regulators of cell identity, function, and survival in multicellular organisms.
The C. elegans genome encodes five TGF-β family members, offering a model system to study these pathways.
Understanding TGF-β signaling is key to deciphering fundamental biological processes.

Purpose of the Study:

To review the known signaling pathways of TGF-β ligands in C. elegans.
To summarize the biological functions associated with these TGF-β signaling pathways.
To highlight the roles of canonical and noncanonical signaling.

Main Methods:

Literature review of published research on C. elegans TGF-β signaling.

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Analysis of genetic and molecular data related to TGF-β ligands and their pathways.

Comparative analysis of signaling mechanisms.

Main Results:

Two TGF-β ligands, DBL-1 and DAF-7, utilize a canonical receptor-Smad signaling pathway.
A third ligand, UNC-129, signals through a noncanonical pathway.
The functions of the remaining two TGF-β ligands are currently uncharacterized.

Conclusions:

TGF-β signaling pathways in C. elegans are diverse, involving both canonical and noncanonical routes.
Specific ligands like DBL-1, DAF-7, and UNC-129 have defined roles in development and cell function.
Further research is needed to elucidate the functions of the uncharacterized TGF-β ligands.