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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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Does malaria affect placental development? Evidence from in vitro models.

Alexandra J Umbers1, Danielle I Stanisic, Maria Ome

  • 1Department of Medicine, University of Melbourne, Melbourne, Victoria, Australia. alex.umbers@gmail.com

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Malaria in early pregnancy, particularly Plasmodium falciparum, impairs placental development by reducing trophoblast invasion. This may lead to fetal growth restriction (FGR) due to altered maternal hormones and inflammation.

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Area of Science:

  • Obstetrics and Gynecology
  • Infectious Diseases
  • Reproductive Biology

Background:

  • Malaria during pregnancy is linked to fetal growth restriction (FGR).
  • Pathogenic mechanisms of malarial FGR, including impaired placental development, are not well understood.
  • In vitro models were used to investigate how malaria-associated factors in maternal blood affect placental trophoblast development.

Purpose of the Study:

  • To investigate the impact of malaria in early pregnancy on placental development using in vitro models.
  • To determine if soluble factors in maternal blood from malaria-infected pregnancies impair trophoblast migration and invasion.
  • To compare the concentrations of key hormones and inflammatory factors in malaria-infected versus uninfected pregnancies.

Main Methods:

  • Utilized in vitro models simulating placental trophoblast migration and invasion into the uterine wall.
  • Assessed trophoblast invasion, migration, and viability using serum/plasma from pregnant women in Papua New Guinea with Plasmodium falciparum or Plasmodium vivax infections.
  • Measured concentrations of hormones and inflammatory factors in maternal blood samples.

Main Results:

  • Plasmodium falciparum infection significantly reduced trophoblast invasion and migration in vitro (P=.06, P=.004).
  • Plasmodium vivax infection did not significantly affect trophoblast migration (P=.64).
  • The negative impact of P. falciparum was independent of trophoblast viability and associated with high-density infections, showing altered levels of invasion-promoting and inhibiting factors.

Conclusions:

  • In vitro models can effectively study the effects of malaria in early pregnancy on placental development.
  • Impaired trophoblast invasion due to malaria may lead to inadequate spiral artery transformation, contributing to FGR.
  • Prevention strategies for malaria in pregnancy should prioritize protection during the first half of gestation.