Related Experiment Videos
Angiontensin-converting enzyme activity in dunning rat prostate tumor
M J Wilson1, M S Mack, M Woodson
1Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA. wilso042@tc.umn.edu
Archives of Andrology
|October 14, 2003
Summary
Researchers characterized angiotensin converting enzyme (ACE) in rat prostate tumors. This enzyme
Area of Science:
- Biochemistry
- Enzymology
- Oncology
Background:
- Prostate tumors exhibit unique enzymatic activities.
- Angiotensin converting enzyme (ACE) plays roles in various physiological processes.
Purpose of the Study:
- To characterize the dipeptidyl carboxypeptidase activity in Dunning rat prostate tumors.
- To determine the properties and regulation of this enzyme.
Main Methods:
- Enzyme activity assays.
- Inhibition studies with captopril.
- Gel filtration chromatography for molecular mass determination.
- Analysis of enzyme activity following castration.
Main Results:
- The enzyme exhibited properties consistent with angiotensin converting enzyme (ACE), including stimulation by NaCl and Co(2+) and inhibition by captopril.
- The molecular mass of the solubilized enzyme was determined to be 110 kDa.
- ACE specific activity remained unchanged after castration, suggesting androgen independence.
Conclusions:
- The characterized enzyme is likely ACE, present in rat prostate tumors.
- ACE activity in these tumors is not regulated by androgens.
- ACE may influence bioactive peptides in the prostate, warranting further investigation into its role in prostate cancer.