Related Experiment Video
Updated: Oct 10, 2025
06:40
Seven Steps to Stellate Cells
Published on: May 10, 2011
34.2K
Proteomic Changes of Activated Hepatic Stellate Cells
Maximilian Schinagl1,2, Tamara Tomin1, Juergen Gindlhuber2
1Institute of Chemical Technologies and Analytics, Technische Universität Wien, 1060 Vienna, Austria.
International Journal of Molecular Sciences
|December 10, 2021
Summary
This study reveals key cellular changes during hepatic stellate cell (HSC) activation, a crucial step in liver fibrosis. Activated HSCs show increased cell cycle proteins, migration, and reduced lipid synthesis, offering insights into liver disease progression.
Area of Science:
- Cell Biology
- Proteomics
- Liver Disease Research
Background:
- Hepatic stellate cells (HSCs) are central to liver fibrosis development.
- HSC activation, a transition from quiescent to fibrotic phenotype, is triggered by liver inflammation.
- The precise cellular mechanisms driving HSC transformation are not fully understood.
Purpose of the Study:
- To investigate the cellular and molecular changes during HSC activation.
- To characterize the proteomic landscape of quiescent versus activated HSCs.
- To establish a reliable model for studying HSC activation.
Main Methods:
- Utilized immortalized human LX-2 HSCs.
- Induced HSC activation using increased fetal bovine serum (FBS) concentration (1% vs. 10%).
- Performed mass spectrometry-based proteomics and comprehensive phenotyping.
Main Results:
- Activated HSCs exhibited increased ribosomal proteins, cell cycle regulators, and migration-associated proteins, leading to enhanced proliferation and migration.
- A decrease in cholesterol and fatty acid biosynthesis proteins was observed.
- Concomitant loss of cytosolic lipid droplets occurred during activation.
Conclusions:
- This study provides updated characteristics of HSC activation using advanced proteomic and bioinformatic analyses.
- The findings highlight key molecular players in HSC transformation relevant to liver fibrosis.
- An accessible serum activation model for HSCs was presented.
Related Concept Videos
01:24Liver Regeneration
3.5K
The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
3.5K
01:58Cell Specific Gene Expression
14.2K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
14.2K