Related Experiment Videos
Partial purification and characterization of mouse peritoneal exudative macrophage elastase
Biochimica Et Biophysica Acta
|March 14, 1980
Summary
Purified mouse macrophage elastase is a metallo-protease, distinct from other elastases. Its resistance to serum inhibitors suggests a key role in connective tissue remodeling.
Area of Science:
- Biochemistry
- Cell Biology
- Enzymology
Background:
- Macrophage elastase is implicated in connective tissue remodeling.
- Understanding its biochemical properties is crucial for elucidating its physiological and pathological roles.
Purpose of the Study:
- To purify and characterize mouse peritoneal exudate macrophage elastase.
- To determine its enzymatic properties and susceptibility to inhibitors.
Main Methods:
- Affinity chromatography using SDS-treated alpha-elastin linked to agarose beads for purification.
- SDS-polyacrylamide gel electrophoresis and Sephadex gel filtration for molecular weight determination.
- Enzyme inhibition assays using specific inhibitors and chelating agents.
Main Results:
- Macrophage elastase was purified with 60% recovery.
- Apparent molecular weights were determined as 26,500 (SDS-PAGE) and 21,000–28,000 (Sephadex).
- The enzyme is a metallo-protease inhibited by EDTA, but not by pancreatic/leukocyte elastase inhibitors or diisopropylphosphorofluoridate.
- It is resistant to human alpha 1-proteinase inhibitor and alpha 2-macroglobulin.
Conclusions:
- Mouse macrophage elastase is a distinct metallo-protease.
- Its resistance to endogenous inhibitors suggests a significant role in connective tissue remodeling during physiological and pathological processes.