Incomplete dominance of the low antibody response to Cryptosporidium parvum antigens in mice selected for high and low antibody responsiveness

M. C A Teixeira, N. M. Alcântara-Neves, Charles R Sterling, L. C. Pontes-de-Carvalho, O. A. Sant'Anna

Research output: Contribution to journalArticle

Abstract

The humoral antibody response to Cryptosporidium was investigated in mice genetically selected for high (H) and low (L) antibody responsiveness. Groups of 4-5 mice from two different selections, general primary (GP) and general secondary (GS), were studied. Following immunization with Cryptosporidium parvum antigens, the maximum levels of IgG in the HGP (X̄ ± SD = 1.13 ± 0.35, N = 5) and in the HGS (0.42 ± 0.15, N = 4) lines, and of IgM in the HGP line (0.86 ± 0.53, N = 5) were significantly higher than those in their L counterparts (0.04 ± 0.02, N = 5; 0.05 ± 0.02, N = 4 and 0.24 ± 0.07, N = 5, respectively). These findings were similar to those reported for other immunogens. However, the IgG (0.22 ± 0.05, N = 4) and the IgM (0.33 ± 0.08, N = 4) responses to immunization of F1 (LGP × HGP) hybrids indicated an incomplete dominance of the low response, in contrast to the incomplete dominance of the high response described for many other antigens and representing an important exception. In addition, the H, L and F1 mice did not develop detectable infections when inoculated with live Cryptosporidium oocysts, supporting the view that a reduced or zero antibody production itself is not enough to permit the establishment of Cryptosporidium infection in adult mice.

Original languageEnglish (US)
Pages (from-to)1479-1483
Number of pages5
JournalBrazilian Journal of Medical and Biological Research
Volume29
Issue number11
StatePublished - Nov 1996

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incomplete dominance
Cryptosporidium parvum
Cryptosporidium
Antibody Formation
Immunization
antigens
Antigens
antibodies
Immunoglobulin M
Antibodies
mice
Immunoglobulin G
immunization
Oocysts
antibody formation
Infection
oocysts
infection

Keywords

  • Antibody responsiveness
  • C. parvum
  • Genetic control of antibody response
  • Immunization

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Medicine (miscellaneous)

Cite this

Incomplete dominance of the low antibody response to Cryptosporidium parvum antigens in mice selected for high and low antibody responsiveness. / Teixeira, M. C A; Alcântara-Neves, N. M.; Sterling, Charles R; Pontes-de-Carvalho, L. C.; Sant'Anna, O. A.

In: Brazilian Journal of Medical and Biological Research, Vol. 29, No. 11, 11.1996, p. 1479-1483.

Research output: Contribution to journalArticle

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