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Related Concept Videos

Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...

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Decrease of lymphoid dendritic cells in blood from malaria-infected pregnant women.

Mamadou Diallo1, Delphine Aldebert, Jean-Charles Moreau

  • 1Department of Clinical and Parasite Immunology, Institut Pasteur, Dakar, Senegal.

International Journal for Parasitology
|July 9, 2008
PubMed
Summary

Placental malaria in pregnant women alters dendritic cell (DC) populations, decreasing lymphoid DCs (LDCs) and increasing less differentiated DCs (ldDCs). This immune modulation may impact malaria susceptibility.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Obstetrics

Background:

  • Dendritic cell (DC) activation during malaria is understudied, primarily in rodent models.
  • Pregnancy involves complex immune adaptations, potentially increasing susceptibility to infections like malaria.

Purpose of the Study:

  • To investigate DC subset activation in pregnant women with placental malaria in Senegal.
  • To correlate DC phenotypes with malaria infection status and susceptibility.

Main Methods:

  • Flow cytometry was used to assess ex vivo DC phenotypes in peripheral, placental, and cord blood.
  • Samples were collected from pregnant women at delivery.

Main Results:

  • Placental malaria decreased total DCs in placental blood and lymphoid DCs (LDCs) across all compartments.
  • Less differentiated DCs (ldDCs) increased, while Human Leucocyte Antigen DR (HLA-DR) expression decreased on DCs.
  • Interleukin-10 (IL-10) levels increased in all blood compartments during infection.

Conclusions:

  • Placental malaria significantly modulates DC subpopulations, potentially altering immune responses.
  • Decreased LDCs and increased IL-10 suggest immune shifts, possibly due to DC migration to lymphoid organs.