Peripheral blood mononuclear cells derived from grand multigravidae display a distinct cytokine profile in response to P. falciparum infected erythrocytes

PLoS One. 2014 Jan 22;9(1):e86160. doi: 10.1371/journal.pone.0086160. eCollection 2014.

Abstract

Immunopathology of placental malaria is most significant in women in their first pregnancy especially in endemic areas, due to a lack of protective immunity to Plasmodium falciparum, which is acquired in successive pregnancies. In some studies (but not all), grand multigravidae (defined as 5 or more pregnancies, G5-7) are more susceptible to poor birth outcomes associated with malaria compared to earlier gravidities. By comparing peripheral cellular responses in primigravidae (G1), women in their second to fourth pregnancy (G2-4) and grand multigravidae we sought to identify key components of the dysregulated immune response. PBMC were exposed to CS2-infected erythrocytes (IE) opsonised with autologous plasma or unopsonised IE, and cytokine and chemokine secretion was measured. Higher levels of opsonising antibody were present in plasma derived from multigravid compared to primigravid women. Significant differences in the levels of cytokines and chemokines secreted in response to IE were observed. Less IL-10, IL-1β, IL-6 and TNF but more CXCL8, CCL8, IFNγ and CXCL10 were detected in G5-7 compared to G2-4 women. Our study provides fresh insight into the modulation of peripheral blood cell function and effects on the balance between host protection and immunopathology during placental malaria infection.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Antibodies / blood
  • Cell Line
  • Cytokines / blood*
  • Disease Susceptibility
  • Erythrocytes / parasitology*
  • Female
  • Gravidity*
  • Humans
  • Leukocytes, Mononuclear / immunology*
  • Leukocytes, Mononuclear / metabolism
  • Malaria, Falciparum / blood*
  • Malaria, Falciparum / immunology*
  • Malaria, Falciparum / parasitology
  • Opsonin Proteins / blood
  • Placenta / immunology
  • Placenta / parasitology
  • Plasmodium falciparum / immunology*
  • Pregnancy
  • Pregnancy Complications, Parasitic
  • Young Adult

Substances

  • Antibodies
  • Cytokines
  • Opsonin Proteins

Grants and funding

Australian NHMRC Project Grant 628611 to AJ and SJR. This study was supported by the MiP Consortium, which is funded through a grant from the Bill & Melinda Gates Foundation to the Liverpool School of Tropical Medicine. The authors gratefully acknowledge the contribution to this work of the Victorian Operational Infrastructure Support Program received by the Burnet Institute. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.