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Clinical and Vaccine Immunology, February 2006, p. 289-296, Vol. 13, No. 2
1071-412X/06/$08.00+0     doi:10.1128/CVI.13.2.289-296.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Anti-Interleukin-15 Prevents Arthritis in Borrelia-Vaccinated and -Infected Mice

Corey A. Amlong,1,2 Dean T. Nardelli,1,3 Sara Heil Peterson,1,2 Thomas F. Warner,5 Steven M. Callister,6 and Ronald F. Schell1,2,3,4*

Wisconsin State Laboratory of Hygiene,1 Department of Bacteriology,2 Department of Comparative Biomedical Sciences,3 Department of Medical Microbiology and Immunology, University of Wisconsin,4 Department of Pathology, Veterans Administration Hospital, Madison,5 Microbiology Research Laboratory and Section of Infectious Diseases, Gundersen Lutheran Medical Center, La Crosse, Wisconsin6

Received 27 September 2005/ Returned for modification 10 November 2005/ Accepted 1 December 2005

We showed previously that interleukin-17 (IL-17) plays a significant role in the induction of arthritis associated with Borrelia vaccination and challenge. Little information, however, is available about the chain of immunologic events that leads to the release of IL-17. The production of IL-17 has been linked to stimulation of memory cells by IL-15. Therefore, we hypothesized that IL-15 is involved in the induction of arthritis associated with Borrelia vaccination and infection of mice. Here we present evidence that treatment of Borrelia-vaccinated and -infected mice with anti-IL-15 antibody prevents swelling of the hind paws. More importantly, both anti-IL-15 antibody- and recombinant IL-15 receptor alpha-treated Borrelia-vaccinated and -infected mice were free of major histopathologic indications of arthritis, including hyperplasia, hypertrophy, and vilus formation of the synovium. Similarly, the synovial space and perisynovium were free of inflammatory cells. By contrast, the synovium of nontreated Borrelia-vaccinated and -infected mice had overt hyperplasia, hypertrophy, and vilus formation. Moreover, the synovial space and perisynovium were infiltrated with neutrophils, macrophages, and lymphocytes. Finally, we show that recombinant IL-15 stimulates the release of IL-17 from lymph node cells obtained near the arthritic site. These results suggest that IL-15 plays a major role in orchestrating IL-17 induction of arthritis associated with Borrelia-vaccinated and -infected mice.

* Corresponding author. Mailing address: University of Wisconsin, Wisconsin State Laboratory of Hygiene, 465 Henry Mall, Madison, WI 53706. Phone: (608) 262-3634. Fax: (608) 265-3451. E-mail: RFSchell{at}wisc.edu.

Clinical and Vaccine Immunology, February 2006, p. 289-296, Vol. 13, No. 2
1071-412X/06/$08.00+0     doi:10.1128/CVI.13.2.289-296.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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