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Infection and Immunity, July 2001, p. 4268-4275, Vol. 69, No. 7
Wisconsin State Laboratory of
Hygiene1 and Departments of Medical
Microbiology and Immunology2 and
Bacteriology,5 University of Wisconsin,
Madison, Wisconsin 53706, and Microbiology Research
Laboratory3 and Section of
Infectious Diseases,4 Gundersen Lutheran Medical
Center, La Crosse, Wisconsin 54601
Received 14 November 2000/Returned for modification 23 February
2001/Accepted 29 March 2001
Protection against infection with Borrelia burgdorferi
is dependent primarily on induction of complement-dependent antibody that can kill the spirochete. Measuring the production of sustained high levels of borreliacidal antibody is thus paramount for determining potential vaccine efficacy. We investigated the borreliacidal antibody
response in sera and the amount of antibody produced by cultured lymph
node cells of C3H/HeJ mice vaccinated with outer surface protein C
(OspC). We showed that recombinant OspC was a weak stimulant of
borreliacidal antibody production compared to whole cells of
OspC-expressing B. burgdorferi. Mice vaccinated with
B. burgdorferi in adjuvant produced a high level (titer, 5,120) of anti-OspC borreliacidal antibody, which waned rapidly. Similarly, borreliacidal antibody production by cultured lymph node
cells from vaccinated mice peaked soon after vaccination and then
decreased. Treatment of lymph node cells with interleukin-6 (IL-6)
augmented borreliacidal antibody production, particularly immunoglobulin G2b, whereas treatment with anti-IL-6 inhibited the
borreliacidal response. These findings demonstrate a previously unrecognized role for IL-6 in borreliacidal antibody production that
may have important implications for vaccine development.
0019-9567/01/$04.00+0 DOI: 10.1128/IAI.69.7.4268-4275.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Interleukin-6 Enhances Production of Anti-OspC
Immunoglobulin G2b Borreliacidal Antibody
*
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}Facstaff.wisc.edu.
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