Blood-derived anti-inflammatory protein solution blocks the effect of IL-1 beta on human macrophages in vitro

作者：O'Shaughnessey Krista M^*; Panitch Alyssa; Woodell May Jennifer E

来源：Inflammation Research, 2011, 60(10): 929-936.

• IL-1ra
• IL-1
• Platelet-rich plasma
• Autologous protein solution

Objective The purpose of this research was to determine if an autologous protein solution (APS), prepared from platelet-rich plasma (PRP), could reduce the deleterious effects of inflammatory cytokines in vitro.
Methods APS was prepared by processing human blood in a tuned density buoy separation device (Platelet Separation System, Biomet Biologics, LLC) to produce platelet-rich plasma (PRP) and processing the PRP in a concentration device containing polyacrylimide beads to produce a highly concentrated anti-inflammatory solution. A functional assay was designed using recombinant interleukin (IL)-1 beta to upregulate IL-8 production by human monocytes. Either recombinant human interleukin-1 receptor antagonist (rhIL-1ra) or APS was added to some samples to determine if a reduced inflammatory response could be identified in vitro. The enzyme-linked immunosorbent assay (ELISA) method was employed to perform cytokine analyses, and Student's t test (alpha = 0.05) was used for all statistical analyses.
Results Both the rhIL-1ra and the APS reduced the effect of IL-1 beta on human macrophages in vitro. This was measured by the reduced production of IL-8 and tumor necrosis factor (TNF)-alpha. Further analysis of the supernatants confirmed the presence of high concentrations of IL-1ra and soluble TNF receptor I (sTNF-RI) with the APS treatment.
Conclusion The ability of the APS to reduce the effect of IL-1 beta and limit the expression of other inflammatory cytokines in vitro validates its potential use as an autologous treatment for osteoarthritis.

• 出版日期2011-10