The principal objective of this proposed research is to develop a new approach using immobilized fluorogenic substrates to study specific proteases and their relationships to some pathological conditions.
Specific aims of this project include: (1) To design and synthesize oligopeptide amides of 6-aminoquinolines as fluorogenic substrates that undergo selective hydrolysis by specific proteases such as plasminogen activators and elastases; (2) To test the specificity, sensitivity, and efficiency of the fluorogenic substrates by measurement of the rates of proteolysis in solution with purified enzymes; (3) To attach covalently the fluorogenic moiety of the substrates to solid supports such as polyacrylamide beads, collagen-hydroxyethylmethacrylate (HEMA) gels, and glass coverslips, thereby preventing diffusion into solution after enzymatic cleavage; (4) To evaluate effectiveness of immobilized fluorogenic substrates for proteolysis by quantitative fluorescence microscopy; (5) To develop new methods using immobilized fluorogenic substrates for biochemical characterization and single cell bioassay of proteases, and for identification of proteolytic activity in cells and tissues; and (6) To apply these methods to investigate the roles of plasminogen activators and elastases in the pathogenesis of neoplasia, inflammation, and pulmonary emphysema. The development of new methodology that can detect the release of proteases from individual cells, allow their cloning, and permit the investigation of factors that modulate protease secretion during various pathophysicalogical processes will be an important tool for cell biology as well as diagnostic and therapeutic research.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM034052-03
Application #
3284475
Study Section
Biochemistry Study Section (BIO)
Project Start
1984-07-01
Project End
1989-06-30
Budget Start
1986-07-01
Budget End
1987-06-30
Support Year
3
Fiscal Year
1986
Total Cost
Indirect Cost
Name
State University New York Stony Brook
Department
Type
Schools of Medicine
DUNS #
804878247
City
Stony Brook
State
NY
Country
United States
Zip Code
11794