Related Experiment Video
Updated: Jan 5, 2026

Isolation of Primary Myofibroblasts from Mouse and Human Colon Tissue
Published on: October 12, 2013
Proteasome activator PA200 regulates myofibroblast differentiation
Vanessa Welk1, Thomas Meul1, Christina Lukas1
1Comprehensive Pneumology Center (CPC), University Hospital of the Ludwig-Maximilians-University (LMU) and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Max-Lebsche Platz 31, 81377, Munich, Germany.
The proteasome activator PA200 regulates myofibroblast differentiation. Its dysfunction in idiopathic pulmonary fibrosis highlights a new therapeutic target for fibrotic diseases.
Area of Science:
- Cell Biology
- Molecular Biology
- Pathology
Background:
- The proteasome degrades cellular proteins, crucial for cell growth and differentiation.
- Proteasome activators modulate protein turnover, offering therapeutic potential for diseases.
- The function of proteasome activator PA200 in disease remains largely unknown.
Purpose of the Study:
- Investigate the role of PA200 in myofibroblast differentiation and fibrotic tissue remodeling.
- Determine PA200's involvement in idiopathic pulmonary fibrosis (IPF).
Main Methods:
- Examined PA200 expression in patient samples and experimental fibrosis models.
- Utilized transient silencing and overexpression of PA200 in human and mouse cells.
- Assessed PA200-proteasome complex formation.
Main Results:
- PA200 was upregulated in fibrotic lung and kidney tissues and in activated human myofibroblasts.
- PA200 acted as a negative regulator of human myofibroblast differentiation but not mouse cells.
- PA200-proteasome complexes were enhanced in fibrotic conditions.
Conclusions:
- PA200 plays a significant role in regulating myofibroblast activation.
- Dysfunctional PA200 regulation may contribute to idiopathic pulmonary fibrosis.
- PA200 represents a potential therapeutic target for fibrotic diseases.
More Related Videos
06:02Development of an In Vitro Assay to Evaluate Contractile Function of Mesenchymal Cells that Underwent Epithelial-Mesenchymal Transition
Published on: June 10, 2016
10:43Methods to Study Mrp4-containing Macromolecular Complexes in the Regulation of Fibroblast Migration
Published on: May 19, 2016
Related Concept Videos
TGF - β Signaling Pathway
Formation of Muscle Fibers from Myoblasts
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Master Transcription Regulators
Introduction to Fibroblasts
Cell Motility through Blebbing
Blebbing Through the Matrix
In multicellular...
Mechanism of Filopodia Formation
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...