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Infect. Immun., 04 1996, 1100-1109, Vol 64, No. 4
RA Daynes, EY Enioutina, S Butler, HH Mu, ZA McGee and A Araneo B
The study described in this report demonstrates that peripheral lymph nodes
draining nonmucosal tissues can effectively serve as induction sites for
the establishment of common mucosal immunity if the microenvironmental
conditions are altered to mimic those normally present within
mucosa-associated lymphoid tissues (e.g., Peyer's patches). Lymph node
lymphocytes exposed in situ to the immunomodulatory influences of the
hormone 1 alpha, 25-dihydroxy vitamin D 3 were found to produce less gamma
interferon and interleukin- 2 (IL-2) and far more IL-4, IL-5 and IL-10 than
lymphocytes from control animals. When couples with vaccination with
hepatitis B surface antigen (HBsAg), the hormone, immunomodulated switch
from a peripheral lymph node phenotype to a Peyer's patch-like pattern
promoted the induction of both a systemic and a common mucosal immune
response. This was determined by the observed increased concentrations of
serum anti- HBsAg antibody and by finding that anti-HBsAg secretory
antibodies were detectable in urogenital, lachrymal, fecal and oral
secretions only in the hormone-treated animals. In addition, specific
antibody-secreting cells were detectable in the lamina propria of the lungs
and small intestines of the hormone-treated animals subsequent to
vaccination, indicating that the homing properties of antigen-specific B
cells were being affected by the treatment procedure. The humoral and
mucosal immune responses were further augmented if both 1 alpha,
25-dihydroxy vitamin D 3 and dehydroepiandrosterone were used together as
hormonal immunomodulators. This novel immunization technique may afford new
opportunities to effectively intervene in sexually transmitted diseases and
other diseases caused by mucosal pathogens.
Copyright © 1996, American Society for Microbiology
Induction of common mucosal immunity by hormonally immunomodulated peripheral immunization
Department of Pathology, University of Utah, Salt Lake City, 84132, USA.
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