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Updated: Jul 17, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
Published on: June 15, 2017
TRB3 modulates C2C12 differentiation by interfering with Akt activation.
1The Molecular Oncology Research Institute, Tufts-New England Medical Center, 750 Washington St., Boston, MA 02111, USA.
The study reveals that the protein Tribbles homolog 3 (TRB3) is downregulated during muscle differentiation. TRB3 inhibits Akt activation, suppressing muscle cell differentiation, while its knockdown enhances it.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- TRB3 is a non-enzymatic member of the TRB protein family.
- TRB3 interacts with Ser/Thr kinases like Akt, inhibiting their activation by growth factors and insulin.
Purpose of the Study:
- To investigate the role of TRB3 in muscle differentiation.
- To elucidate the mechanism by which TRB3 affects muscle cell development.
Main Methods:
- Utilized C2C12 myoblast cell line.
- Examined TRB3 expression levels during differentiation.
- Overexpressed and knocked down TRB3 to assess its functional impact.
- Monitored Akt activation pathways.
Main Results:
- TRB3 expression was found to be downregulated during C2C12 cell muscle differentiation.
- Overexpression of TRB3 inhibited Akt activation during differentiation.
- Overexpression of TRB3 suppressed C2C12 differentiation, while TRB3 knockdown enhanced it.
Conclusions:
- TRB3 plays a critical regulatory role in muscle differentiation.
- TRB3 negatively impacts muscle cell development by inhibiting Akt activation.
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