Crude extract and recombinant protein of Cryptosporidium parvum oocysts induce proliferation of human peripheral blood mononuclear cells in vitro

J Infect Dis. 1995 Jul;172(1):211-6. doi: 10.1093/infdis/172.1.211.


Cryptosporidium parvum preparations were studied for their ability to induce specific proliferation of cultured human peripheral blood mononuclear cells (PBMC) from both immunocompetent and human immunodeficiency virus-positive persons, some of whom had transient cryptosporidiosis. The proliferation of PBMC from sensitized donors induced by C. parvum preparations was due mainly to antigen-specific rather than nonspecific activation, as indicated by the kinetics of the proliferative response, inhibition of the PBMC proliferation by a monoclonal antibody directed against major histocompatibility complex class II-specific HLA-DR molecule, and lack of proliferation of umbilical cord blood PBMC. PBMC from immunocompromised patients did not proliferate in response to C. parvum-specific antigens. The supernatants of PBMC obtained from immunocompetent donors contained interleukin-10 and interferon (IFN)-gamma after PBMC were exposed to C. parvum preparations. High IFN-gamma values were found in patients who had recovered from cryptosporidiosis, suggesting that IFN-gamma plays a role in resolving this infection.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Division / drug effects
  • Cells, Cultured
  • Cryptosporidium parvum / pathogenicity*
  • Cytokines / biosynthesis*
  • Enzyme-Linked Immunosorbent Assay
  • Humans
  • Interferon-gamma / biosynthesis
  • Interleukin-10 / biosynthesis
  • Interleukin-2 / pharmacology
  • Leukocytes, Mononuclear / cytology*
  • Leukocytes, Mononuclear / drug effects
  • Leukocytes, Mononuclear / parasitology
  • Phytohemagglutinins / pharmacology
  • Protozoan Proteins / pharmacology*
  • Recombinant Proteins / pharmacology


  • Cytokines
  • Interleukin-2
  • Phytohemagglutinins
  • Protozoan Proteins
  • Recombinant Proteins
  • Interleukin-10
  • Interferon-gamma