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A trypsin inhibitor isolated from lymphatic leukemia cells
Biomedica Biochimica Acta
|January 1, 1986
Summary
A novel trypsin inhibitor was isolated from leukemia cells and purified. This thermostable peptide effectively inhibits trypsin
Area of Science:
- Biochemistry
- Molecular Biology
- Cancer Research
Background:
- Murine L 1210 lymphatic leukemia cells are a model for studying cancer progression.
- Protease inhibitors play crucial roles in regulating cellular processes and disease development.
Purpose of the Study:
- To isolate and characterize a novel trypsin inhibitor from murine L 1210 lymphatic leukemia cells.
- To assess the inhibitor's stability and its effect on trypsin's enzymatic activity.
Main Methods:
- Affinity chromatography using Trypsin-Sepharose 4B.
- Ion-exchange chromatography on QAE Sephadex A-50.
- Enzyme inhibition assays using hemoglobin, azocasein, and esterase substrates.
Main Results:
- A highly purified trypsin inhibitor (approximately 197-fold purification) was obtained.
- The inhibitor demonstrated significant thermostability and was non-sensitive to pH variations between 2 and 10.
- The purified inhibitor effectively blocked the proteolytic and esterase activities of trypsin.
Conclusions:
- A potent and stable trypsin inhibitor exists in murine L 1210 leukemia cells.
- This inhibitor has potential applications in understanding or treating conditions involving trypsin activity.