Arginine Deprivation Affects Gene Expression in Liver Cells
Author Information
Author(s): Leong Hwei Xian, Simkevich Carl, Lesieur-Brooks Anne, Lau Bonnie W, Fugere Celine, Sabo Edmond, Thompson Nancy L
Primary Institution: Rhode Island Hospital – Brown Medical School
Hypothesis
Liver cell gene expression is highly sensitive to alterations in the amino acid microenvironment and that tumor cells may differ substantially in gene sets sensitive to amino acid availability.
Conclusion
Arginine-sensitive regulation appears to be an important homeostatic mechanism to coordinate cell response and nutrient availability in hepatic cells.
Supporting Evidence
- 1419 genes in normal cells and 2175 in tumor cells were altered in arginine-deficient conditions.
- Approximately half of the arginine-responsive genes in normal cells overlap with those in tumor cells.
- The majority of overlapping genes were increased in expression, including multiple growth and stress-related genes.
Takeaway
When liver cells don't get enough arginine, they change how they express certain genes, which is important for their growth and survival.
Methodology
The study used an Affymetrix microarray approach with a paired in vitro model of normal rat hepatic cells and a tumorigenic derivative, exposing cells to arginine-deficient or control conditions for 18 hours.
Limitations
The study was limited to a specific time frame and cell types, and the relevance of findings to in vivo conditions remains uncertain.
Participant Demographics
Normal rat hepatic cells and tumorigenic hepatic cells.
Statistical Information
P-Value
0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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