title: Modulatory effect of chiral nonsteroidal anti-inflammatory drugs on apoptosis of human neutrophils.
abstract: Polymorphonuclear neutrophils (PMNs) are short-lived leukocytes that die by apoptosis. Although PMNs are crucial in the defense against infection, they have been implicated in the pathogenesis of tissue injury observed in inflammatory diseases. The induction or prevention of PMN apoptosis is currently discussed as a key event in the control of inflammation. Caspase-3 activation is the first step in the execution phase of apoptosis. In the study, effect of racemic mixtures and enantiomers of 2-arylpropionic acid derivatives: ketoprofen, flurbiprofen (FBP), and (+)-S-naproxen and 2-arylbutyric acid: indobufen on apoptosis activation via caspase-3 and phosphatidylserine (PS) translocation (annexin-V binding) in human neutrophils in vitro has been investigated. Caspase-3 activation was detected by Western blotting, fluorometric assay of DEVD-AMC cleavage, and flow cytometry with carboxyfluorescein (FAM) labeled caspase inhibitor. PMNs were isolated and cultured up to 24 h. The chiral nonsteroidal anti-inflammatory drugs (NSAIDs) were found to modulate human PMN apoptosis in a dose- and time-dependent manner. The greater activation of caspase was found at 75-150 microg/ml concentration of racemates as well enantiomers, especially for FBP, whereas NSAIDs at smaller quantities (15 microg/ml) were inactive. At concentration of 75 microg/ml, NSAIDs increased the rate of PS externalization in PMA-stimulated and non-stimulated neutrophils. Additionally, no cytotoxic effect of the NSAIDs was observed at concentration up to 75 microg/ml that induce apoptosis. Regulation of caspase activity by NSAIDs may represent a potent target to trigger apoptosis and resolve inflammatory disorders.
authors: Department of Pharmaceutical Biochemistry, Poznań University of Medical Sciences, Poznań, Poland. mzielin@amp.edu.pl
authors: Małgorzata
authors: M
authors: Zielińska-Przyjemska
authors: Franciszek K
authors: FK
authors: Główka
authors: Joanna
authors: J
authors: Klaczyńska
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry* / Q000494:pharmacology* / Q000633:toxicity; D017209:Apoptosis / Q000187:drug effects*; D053148:Caspase 3 / Q000378:metabolism; D061945:Caspase Inhibitors; D002462:Cell Membrane / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D004789:Enzyme Activation / Q000187:drug effects; D005452:Fluoresceins / Q000378:metabolism; D005470:Fluorometry; D006801:Humans; D009504:Neutrophils / Q000166:cytology / Q000187:drug effects*; D010718:Phosphatidylserines / Q000378:metabolism; D011422:Propionates / Q000737:chemistry / Q000494:pharmacology / Q000633:toxicity; D013237:Stereoisomerism; D013755:Tetradecanoylphorbol Acetate / Q000031:analogs & derivatives / Q000494:pharmacology; D013997:Time Factors
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D061945:Caspase Inhibitors; D005452:Fluoresceins; D010718:Phosphatidylserines; D011422:Propionates; C024098:6-carboxyfluorescein; C016658:phorbolol myristate acetate; D053148:Caspase 3; C029658:propionic acid; D013755:Tetradecanoylphorbol Acetate