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Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry

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JAK2/STAT2/STAT3 are required for myogenic differentiation.

Kepeng Wang¹, Chihao Wang, Fang Xiao

¹Department of Biochemistry, Hong Kong University of Science & Technology, Clearwater Bay, Kowloon, Hong Kong, China.

The Journal of Biological Chemistry

|October 7, 2008

Summary

This summary is machine-generated.

The JAK2/STAT2/STAT3 pathway is crucial for muscle regeneration and growth. This pathway promotes myoblast differentiation, essential for repairing muscle injuries and development.

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Isolation of Skeletal Muscle Satellite Cells for In Vitro Myogenesis Studies

Isolation of Skeletal Muscle Satellite Cells for In Vitro Myogenesis Studies

Published on: February 24, 2026

Area of Science:

Muscle biology
Cell signaling

Background:

Skeletal muscle satellite cells are vital for muscle growth and repair.
Cellular signaling pathways controlling myoblast behavior are not fully understood.

Purpose of the Study:

To investigate the role of JAK/STAT signaling in myoblast differentiation.
To identify novel pathways regulating myogenic differentiation.

Main Methods:

Utilized small molecule inhibitors and small interfering RNA (siRNA) to interfere with specific pathways.
Assessed activation of JAK2, STAT2, and STAT3 during differentiation.
Examined the impact on myogenic regulatory factors (MyoD, MEF2) and growth factor gene expression (IGF2, HGF).

Main Results:

The JAK1/STAT1/STAT3 pathway inhibits premature myoblast differentiation.
A distinct JAK2/STAT2/STAT3 pathway is essential for early myogenic differentiation.
Inhibition of JAK2/STAT2/STAT3 impairs differentiation.
This pathway regulates MyoD, MEF2, IGF2, and HGF, promoting differentiation.

Conclusions:

The JAK2/STAT2/STAT3 pathway plays a novel and critical role in promoting myogenic differentiation.
This pathway contributes to muscle regeneration by regulating key differentiation factors and growth signals.