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Related Experiment Videos

Circulating stem cells in extremely preterm neonates.

Matthew J Bizzarro1, Vineet Bhandari, Diane S Krause

  • 1Department of Pediatrics, Division of Perinatal Medicine, Yale University School of Medicine, New Haven, CT 06520-8064, USA. matthew.bizzarro@yale.edu

Acta Paediatrica (Oslo, Norway : 1992)
|March 30, 2007
PubMed
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Extremely premature neonates have high circulating CD34+ cell levels, which decrease over time. These findings suggest potential therapeutic applications for hematopoietic stem and progenitor cells from umbilical cord blood.

Area of Science:

  • Neonatal Medicine
  • Hematology
  • Stem Cell Biology

Background:

  • Premature neonates face significant health challenges.
  • CD34+ cells are crucial hematopoietic stem and progenitor cells.
  • Understanding CD34+ cell dynamics in neonates is important for potential therapies.

Purpose of the Study:

  • To quantify circulating CD34+ cell levels in premature neonates.
  • To correlate CD34+ cell counts with pulmonary function and neonatal morbidity.
  • To explore the potential of neonatal CD34+ cells for therapeutic use.

Main Methods:

  • Peripheral blood CD34+ cell counts were measured in preterm neonates (24-32 weeks gestation).
  • Measurements were taken within 48 hours of birth and weekly thereafter for 4 weeks.

Related Experiment Videos

  • Pulmonary function tests and neonatal outcome data were collected concurrently.

    • Main Results:

    • Thirty neonates (median gestational age 24 weeks) were analyzed.
    • Mean CD34+ cell count was 99.4 cells/µL in week 1, declining to 54.4 cells/µL by week 4.
    • An inverse correlation was found between initial CD34+ count and gestational age (p=0.01); no significant correlations with pulmonary function or morbidity were observed.

    Conclusions:

    • Extremely premature neonates exhibit high peripheral CD34+ cell levels at birth.
    • Umbilical cord blood from this population may be a rich source of hematopoietic stem and progenitor cells.
    • These findings support further investigation into therapeutic applications.