Abstract：
:The leukokinin-leukokininogen system is a pathological kinin generating system which is catalyzed by acid proteases present in neoplastic cells, white cells and even normal tissues. The components of the human system including leukokinin-H and leukokininogen have now been isolated and characterized. Very specific protease inhibitors of the system such as pepstatin have been found and are now known to prevent "in vivo" the formation of pathological fluids such as neoplastic ascites. Strong evidence has been previously published and additional evidence has been presented here which indicates that pepstatin's actions are related to the inhibition of cathepsin-D in vivo and the inhibition of leukokinin formation. Both leukokinins and leukokininogens have been clearly defined and shown to differ from bradykinin and human bradykininogens. This clearly demonstrates the presence in pathological systems of a kinin-generating system which is separate and distinct from the bradykinin generating system. The importance of the leukokinin-leukokininogen system in disease would seem to be very great. The finding that pepstatin can inhibit the system in vivo opens the way for studies of pepstatin and related protease inhibitors as therapeutic agents in neoplastic disease and protease mediated inflammatory disorders.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Greenbaum LM,Semente G,Grebow P,Roffman Ssubject
Has Abstractpub_date
1979-01-01 00:00:00pages
205-14eissn
0065-2598issn
2214-8019journal_volume
120Bpub_type
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