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Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface
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Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface

Published on: May 21, 2015

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Developmentally determined reduction in CD31 during gestation is associated with CD8+ T cell effector differentiation

Kristin M Scheible1, Jason Emo1, Hongmei Yang2

  • 1University of Rochester, Department of Pediatrics, 601 Elmwood Avenue, Rochester, NY 14642, United States.

Clinical Immunology (Orlando, Fla.)
|August 2, 2015
PubMed

Insights

Premature infants have altered CD8+ T cells, with fewer naive cells and reduced CD31 expression. Earlier gestation is linked to greater CD8+ T cell effector function, increasing inflammation risk in preterm neonates.

Area of Science:

  • Immunology
  • Neonatal Development
  • Cellular Biology

Background:

  • Homeostatic T cell proliferation is more robust during human fetal development.
  • Understanding T cell behavior in preterm infants is crucial for managing their health outcomes.

Purpose of the Study:

  • To characterize CD8+ T cells in preterm infants and assess the impact of gestational age and perinatal exposures.
  • To investigate the relationship between gestational age, CD31 expression, and CD8+ T cell function in preterm neonates.

Main Methods:

  • Characterization of umbilical cord blood CD8+ T cells from preterm infants (23-42 weeks gestation).
  • Analysis of naive CD8+ T cell counts and CD31 expression on T cell subsets.
  • Assessment of in vitro CD8+ T cell effector function in relation to gestational age and inflammatory exposures.

Main Results:

  • Preterm infants exhibited fewer naive CD8+ T cells and lower CD31 expression, irrespective of prenatal exposures.
  • CD8+ T cell effector function was inversely correlated with gestational age, being greater in earlier gestations.
  • Prior inflammatory exposures exacerbated the enhanced effector function in preterm infants.

Conclusions:

  • CD8+ T cells in earlier gestation preterm infants show reduced regulatory capacity (CD31 loss) and increased effector differentiation.
  • These CD8+ T cell alterations may predispose preterm neonates to CD8+ T cell-mediated inflammation.
  • Impaired T cell memory formation is a potential consequence of these developmental changes in preterm infants.

Keywords:
Bronchopulmonary dysplasiaCD8+ T cellFetusImmune dysregulationInflammationNeonatal immunityPrematurity

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