DDAH I and Tumor Growth
Author Information
Author(s): Kostourou V, Robinson S P, Cartwright J E, Whitley G St J
Primary Institution: Department of Biochemistry and Immunology, St George's Hospital Medical School
Hypothesis
Tumor-derived ADMA plays a significant role in the regulation of tumor growth and vascular development.
Conclusion
Increased DDAH expression results in decreased tumor ADMA, increased nitric oxide and VEGF production, vascularization, and tumor growth.
Supporting Evidence
- Enhanced expression of DDAH I increased nitric oxide synthesis.
- VEGF expression and secretion were induced in vitro.
- Tumors derived from DDAH I overexpressing cells grew more rapidly in vivo.
- Imaging showed increased tumor vascular development.
- DDAH activity was detected in human tumors.
Takeaway
This study shows that a protein called DDAH helps tumors grow by making more blood vessels, which gives them the nutrients they need.
Methodology
The study involved manipulating rat C6 glioma cells to overexpress DDAH I and assessing tumor growth and vascular development in vivo and in vitro.
Limitations
The study is limited in the number of human tumor samples analyzed.
Participant Demographics
Female MF1/nu mice were used for in vivo experiments.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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