title: N-Arylacyl O-sulfonated aminoglycosides as novel inhibitors of human neutrophil elastase, cathepsin G and proteinase 3.
abstract: The balance between neutrophil serine proteases (NSPs) and protease inhibitors (PIs) in the lung is a critical determinant for a number of chronic inflammatory lung diseases such as chronic obstructive pulmonary disease, cystic fibrosis and acute lung injury. During activation at inflammatory sites, excessive release of NSPs such as human neutrophil elastase (HNE), proteinase 3 (Pr3) and cathepsin G (CatG), leads to destruction of the lung matrix and continued propagation of acute inflammation. Under normal conditions, PIs counteract these effects by inactivating NSPs; however, in chronic inflammatory lung diseases, there are insufficient amounts of PIs to mitigate damage. Therapeutic strategies are needed to modulate excessive NSP activity for the clinical management of chronic inflammatory lung diseases. In the study reported here, a panel of N-arylacyl O-sulfonated aminoglycosides was screened to identify inhibitors of the NSPs. Dose-dependent inhibitors for each individual serine protease were identified. Select compounds were found to inhibit multiple NSPs, including one lead structure that is shown to inhibit all three NSPs. Two lead compounds identified during the screen for each individual NSP were further characterized as partial mixed inhibitors of CatG. Concentration-dependent inhibition of protease-mediated detachment of lung epithelial cells is demonstrated.
authors: Division of Medicinal and Natural Products Chemistry, Department of Pharmaceutical Sciences and Experimental Pharmaceutics, University of Iowa College of Pharmacy, Iowa City, IA 52242, USA.
authors: Ioana
authors: I
authors: Craciun
authors: Division of Medicinal and Natural Products Chemistry, Department of Pharmaceutical Sciences and Experimental Pharmaceutics, University of Iowa College of Pharmacy, Iowa City, IA 52242, USA.
authors: Amanda M
authors: AM
authors: Fenner
authors: Division of Medicinal and Natural Products Chemistry, Department of Pharmaceutical Sciences and Experimental Pharmaceutics, University of Iowa College of Pharmacy, Iowa City, IA 52242, USA.
authors: Robert J
authors: RJ
authors: Kerns
mesh_terms: D055371:Acute Lung Injury / Q000378:metabolism; D000617:Aminoglycosides / Q000302:isolation & purification / Q000378:metabolism*; D056649:Cathepsin G / Q000037:antagonists & inhibitors / Q000378:metabolism*; D003550:Cystic Fibrosis / Q000378:metabolism; D006801:Humans; D007249:Inflammation / Q000378:metabolism; D019272:Leukocyte Elastase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D053146:Myeloblastin / Q000037:antagonists & inhibitors / Q000378:metabolism*; D053491:Proteinase Inhibitory Proteins, Secretory / Q000378:metabolism*; D029424:Pulmonary Disease, Chronic Obstructive / Q000378:metabolism
chemical_list: D000617:Aminoglycosides; D053491:Proteinase Inhibitory Proteins, Secretory; D056649:Cathepsin G; D019272:Leukocyte Elastase; D053146:Myeloblastin
keywords: glycosaminoglycans; heparin mimics; inflammatory lung disease; neutrophil serine proteases; protease inhibitors