An array of inflammatory diseases such as pulmonary emphysema, chronic bronchitis, cystic fibrosis, psoriasis, rheumatoid arthritis and others, are characterized by an influx of neutrophils, and the presence of mediators of inflammation and cytokines that serve as neutrophil chemoattractants. The recruitment and degranulation of neutrophils in inflammatory states results in the production of reactive oxygen species and the extracellular release of the serine proteinases elastase, cathepsin G and proteinase 3. Poor regulation of the activity of these enzymes because of depressed levels of their physiological protein inhibitors leads to the degradation of the major components of the extracellular matrix and, ultimately the onset of disease. The use of innovative strategies that seek to counteract the damaging effects of the renegade enzymes be reestablishing a proteinase/antiproteinase inhibitor balance constitutes the long-term objective of the proposed research. The use of a potentially universal heterocyclic scaffold in the design of mechanism-based inhibitors that endows these inhibitors with unique mechanistic features and optimal biochemical properties is proposed.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL057788-03
Application #
6125830
Study Section
Bio-Organic and Natural Products Chemistry Study Section (BNP)
Project Start
1997-12-10
Project End
2001-11-30
Budget Start
1999-12-01
Budget End
2000-11-30
Support Year
3
Fiscal Year
2000
Total Cost
$132,607
Indirect Cost
Name
Wichita State University
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
City
Wichita
State
KS
Country
United States
Zip Code
67260
Dou, Dengfeng; He, Guijia; Alliston, Kevin R et al. (2011) Dual function inhibitors of relevance to chronic obstructive pulmonary disease. Bioorg Med Chem Lett 21:3177-80
Groutas, William C; Dou, Dengfeng; Alliston, Kevin R (2011) Neutrophil elastase inhibitors. Expert Opin Ther Pat 21:339-54
Dou, Dengfeng; Viwanathan, Prasanth; Li, Yi et al. (2010) Design, synthesis, and in vitro evaluation of potential West Nile virus protease inhibitors based on the 1-oxo-1,2,3,4-tetrahydroisoquinoline and 1-oxo-1,2-dihydroisoquinoline scaffolds. J Comb Chem 12:836-43
He, Guijia; Dou, Dengfeng; Wei, Liuqing et al. (2010) Inhibitors of human neutrophil elastase based on a highly functionalized N-amino-4-imidazolidinone scaffold. Eur J Med Chem 45:4280-7
Dou, Dengfeng; He, Guijia; Kuang, Rongze et al. (2010) Effects of structure on inhibitory activity in a series of mechanism-based inhibitors of human neutrophil elastase. Bioorg Med Chem 18:6646-50
Dou, Dengfeng; He, Guijia; Li, Yi et al. (2010) Utilization of the 1,2,3,5-thiatriazolidin-3-one 1,1-dioxide scaffold in the design of potential inhibitors of human neutrophil proteinase 3. Bioorg Med Chem 18:1093-102
Li, Yi; Dou, Dengfeng; He, Guijia et al. (2009) Mechanism-based inhibitors of serine proteases with high selectivity through optimization of S' subsite binding. Bioorg Med Chem 17:3536-42
Yang, Qingliang; Li, Yi; Dou, Dengfeng et al. (2008) Inhibition of serine proteases by a new class of cyclosulfamide-based carbamylating agents. Arch Biochem Biophys 475:115-20
Huang, Weijun; Yamamoto, Yasufumi; Li, Yi et al. (2008) X-ray snapshot of the mechanism of inactivation of human neutrophil elastase by 1,2,5-thiadiazolidin-3-one 1,1-dioxide derivatives. J Med Chem 51:2003-8
Li, Yi; Yang, Qingliang; Dou, Dengfeng et al. (2008) Inactivation of human neutrophil elastase by 1,2,5-thiadiazolidin-3-one 1,1 dioxide-based sulfonamides. Bioorg Med Chem 16:692-8

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