Acute Phase Protein Response and Polymorphonuclear Leukocyte Cathepsin G Release After Slow Interleukin-1 Stimulation in the Rat. Issue 6 (1994)

• Record Type: Journal Article
• Authors: Björk Björk, Peter Peter; Gudmundsson Gudmundsson, Thorarinn Thorarinn; Ohlsson Ohlsson, Kjell Kjell
• Is Part Of: Mediators of inflammation. Volume 3:Issue 6(1994)
• Page Start: 425
• Page End: 431
• Publication Date: 1994
• Subjects: Inflammation -- Mediators -- Periodicals; Biological response modifiers -- Periodicals; Inflammation (Pathologie) -- Médiateurs; Immunomodulateurs; Biological response modifiers; Inflammation -- Mediators; Immunology; Autacoids; Immunologic Factors; Cell Adhesion Molecules; Cell Communication; Cytokines; Inflammation; Periodicals; Electronic journals; 616.0473
• DOI: 10.1155/S0962935194000608
• Languages: English
• ISSNs: 0962-9351

Abstract

Abstract : In this work we have studied the acute phase protein response and degranulation of polymorphonuclear leukocytes in vivo in the rat after a slow interleukin-1β stimulation. A total dose of 1 μg, 2 μg, 4 μg and 0 μg (controls with only vehicle) of interleukin-1β was released from osmotic minipumps over a period of 7 days. The pumps were implanted subcutaneously. A cystic formation was formed around the pumps that contained interleukin-1β whereas no tissue reaction was seen around pumps containing only vehicle. Besides flbroblasts the cyst wall contained numerous polymorphonuclear leukocytes which were positively stained for cathespin G. α2 -macroglobulin, α1 -inhtbitor-3, α1 -proteinase inhibitor, albumin and C3 were measured by electroimmunoassay and all showed plasma concentration patterns that were dose-dependent to the amount of interleuktn-1β released. Fibrinogen in plasma was elevated in the control group but showed decreased plasma values with higher doses of interleukin-1β released. All animals showed increased plasma levels of cathespin G but the lowest levels for cathespin G were seen for the highest interleukin-1β dose released. It was clearly seen that a slow continuous release of interleukin-1β in vivo caused an inflammatory reaction. Plasma levels for the proteins analysed all showed a similar pattern, namely an initial increase or decrease of plasma concentration followed by a tendency to normalization of plasma values. It was concluded that a long-term interleukin-1β release could not sustain the acute phase protein response elicited by the initial interleukin-1β release.