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BioI. Chem. Hoppe-Seyler Vol. 371, pp. 721-724, August 1990

Activation of the Human Leukocyte Proteinases Elastase and Cathepsin G by Various Surfactants* Herbert R. WENZEL", Anke FELDMANN 3 , Siegfried ENGELBRECHT b and Harald TscHESCHE3 a b

Universität Bielefeld, Fakultät für Chemie Universität Osnabrück, Fachbereich Biologie/Chemie

(Received 25 May 1989)

Summary: A systematic study comprising 28 synthetic ionic and nonionic surfactants was carried out in order to examine their effect on the activity of elastase and cathepsin G from human leukocytes against 4-nitroanilide substrates. The whole spectrum, rang-

ing from a complete loss to a pronounced rise in enzymatic activity, was observed at a 0.1% (w/v) surfactant concentration. Most significantly, benzalkonium chloride led to a five-fold increase in elastase activity.

Aktivierung der menschlichen Leukozyten-Proteinasen Elastase und Cathepsin G durch verschiedene Tenside Zusammenfassung: In einer systematischen Untersuchung wurde der Einfluß von 28 synthetischen ionischen und nichtionischen Tensiden auf die Aktivität von Elastase und Cathepsin G aus menschlichen Leukozyten gegen 4-Nitroanilid-Substrate getestet. Bei einerTensidkonzentration von 0.1% (w/v) wurde das

gesamte Spektrum von einem vollständigen Verlust bis zu einer erheblichen Steigerung der Enzymaktivität beobachtet. Besonders bemerkenswert ist die fünffache Steigerung der Elastaseaktivität durch Benzalkoniumchlorid.

Key words: Cathepsin G, elastase, leukocytes, proteinases, surfactants.

The proteinases from neutrophilic polymorphonuclear leukocytes have attracted increasing interest in recent years due to their probable involvement in connective tissue disorders. In particular, there is strong evidence that the leukocyte elastase promotes, or at least exacerbates, diseases such as rheumatoid arthritis, pulmonary emphysema or adult respiratory distress syndromel3

Activation of the human leukocyte proteinases elastase and cathepsin G by various surfactants.

A systematic study comprising 28 synthetic ionic and nonionic surfactants was carried out in order to examine their effect on the activity of elastase...
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