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- Title
Antimicrobial Activity Does Not Predict Cytokine Response to Adrenomedullin or Its Shortened Derivatives.
- Authors
Hussain, Quratul Ann; Sheehan, Barry E.; McKay, Ian J.; Allaker, Robert P.
- Abstract
The aim of this study was to investigate cytokine release from oral keratinocytes and fibroblasts in response to AM and shortened derivatives previously characterised in terms of their antimicrobial activities. Cells were incubated with AM or its fragments (residues 1-12, 1-21, 13-52, 16-21, 16-52, 22-52, 26-52, and 34 -52), and culture supernatants collected after 1, 2, 4, 8, and 24 hours. A time-dependant increase in production of interleukin 1-α and interleukin 1-Β from keratinocytes in response to all peptides was demonstrated. However, exposure to fragments compared to whole AM resulted in reduced production of these cytokines (60% mean reduction at 24 hours, P < .001 ). No consistent differences were shown between the cytokine response elicited by antimicrobial and nonantimicrobial fragments. The production of interleukin-6 and interleukin-8 did not change significantly with time or peptide used. Fibroblast cells were relatively unresponsive to all treatments. This study demonstrates that antimicrobial activity does not predict cytokine response to adrenomedullin or its shortened derivatives.
- Subjects
CYTOKINES; ADRENOMEDULLIN; KERATINOCYTES; FIBROBLASTS; INTERLEUKINS
- Publication
Mediators of Inflammation, 2007, Vol 2007, Issue 2, p1
- ISSN
0962-9351
- Publication type
Article
- DOI
10.1155/2007/30987