Ontogénie du système immunitaire

Millet, V.; Lacroze, V; Bodiou, A.C.; Dubus, Jean‐Christophe; D’ercole, C.; Ünal, Derya

doi:10.1016/s0929-693x(99)80241-3

Cited by 7 publications

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We observed a significant negative correlation of the percentage of CD4+ IFN-Á-and of CD8+ IL-2-producing cells with GA. Moreover, we found a significant decrease in the percentage of IL-4 and IFN-Á production in CB compared to children and adults; this may be justified by a switch from the CD45RA+ to the CD45RO+ phenotype, since in adults both IL-4 and IFN-Á are mostly produced by CD45RO+ cells [26][27][28].…”

Section: Discussionmentioning

confidence: 65%

Age-Related Changes in Intracellular Th1/Th2 Cytokine Production, Immunoproliferative T Lymphocyte Response and Natural Killer Cell Activity in Newborns, Children and Adults

et al. 2003

View full text Add to dashboard Cite

To evaluate the development of the neonatal immune system, we measured T lymphocyte response to Con A, intracellular IL-2, IL-4, IFN-γ and IL-10 production, and natural killer cell (NKC) activity in 12 very preterm, 12 preterm and 20 term neonates, 10 children and 10 adults. Immunoproliferation to Con A was significantly lower in cord blood than in children or adults. The percentage of CD4+ lymphocytes was significantly higher in newborns while CD8+ cells were higher at older ages, with a resulting gradual decline of the CD4+/CD8+ ratio. The percentage of IL-2-producing CD4+ and CD8+ cells was higher in all newborn groups than in children and adults, while the percentage of IL-4-producing cells was higher for CD8+ and lower for CD4+ cells in cord blood than in children and adults. Neonates had substantially lower percentages of CD4+ and CD8+ IFN-γ-producing cells. A significant negative correlation was observed between gestational age and IFN-γ-CD4+-, IL-2-CD8+-, and IL-10- CD4+-producing cells. In addition, a positive correlation was found between gestational age and IL-10-CD8+-producing cells. Percentages of CD4+/CD45RA+ cells were higher and CD4+/CD45RO+ percentages were lower in newborns than in children and adults. NKC activity in infants was significantly correlated with gestational age and significantly impaired compared to children and adults. On the whole, these results suggest a gradual development of immunity during gestation and show significant immaturity of cellular immune response at birth. The reduction of NKC activity, the lower proliferative response of T cells, the reduced cytotoxic response and a dysregulated cytokine production may contribute to the neonatal increased risk of infection and to the low incidence of graft-versus-host disease after cord blood transplantation.

show abstract

Section: Discussionmentioning

confidence: 65%