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2017 ; 16
(ä): 1018-1030
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Immunization enhances the natural antibody repertoire
#MMPMID28900382
Beinart D
; Ren D
; Pi C
; Poulton S
; Holzknecht ZE
; Swanson C
; Parker W
EXCLI J
2017[]; 16
(ä): 1018-1030
PMID28900382
show ga
The role of immunization in the production of antibodies directed against
immunogens is widely appreciated in laboratory animals and in humans. However,
the role of immunization in the development of "natural antibodies" has not been
investigated. Natural antibodies are those antibodies present without known
history of infection or immunization, and react to a wide range of targets,
including "cryptic" self-antigens that are exposed upon cell death. In this
study, the ability of immunization to elicit the production of natural antibodies
in laboratory rats was evaluated. Laboratory rats were immunized with a series of
injections using peanut extracts (a common allergen), a high molecular weight
protein conjugated to hapten (FITC-KLH), and a carbohydrate conjugated to hapten
(DNP-Ficall). Significantly greater binding of antibodies from immunized animals
compared to controls was observed to numerous autologous organ extracts (brain,
kidney, liver, lung, prostate, and spleen) for both IgM and IgG, although the
effect was more pronounced for IgM. These studies suggest that immunization may
have at least one unforeseen benefit, enhancing networks of natural antibodies
that may be important in such processes as wound repair and tumor surveillance.
Such enhancement of natural antibody function may be particularly important in
Western society, where decreased exposure to the environment may be associated
with a weakened natural antibody repertoire.