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Isolation of Precursor B-cell Subsets from Umbilical Cord Blood
14:06

Isolation of Precursor B-cell Subsets from Umbilical Cord Blood

Published on: April 16, 2013

Significant changes in the composition of the precursor B-cell compartment in children less than 2 years old

Barbara Piątosa1, Mariusz Birbach, Katarzyna Siewiera

  • 1Histocompatibility Laboratory, Children's Memorial Health Institute, Warsaw, Poland. b.piatosa@czd.pl

Cytometry. Part B, Clinical Cytometry
|March 12, 2013
PubMed

Insights

This study establishes normal ranges for B-cell development in children, crucial for diagnosing immune deficiencies. Early B-cell maturation varies significantly with age, especially in the first two years of life.

Area of Science:

  • Immunology
  • Pediatrics

Background:

  • Defects in early B lymphocyte maturation are key in primary immune deficiencies causing agammaglobulinemia.
  • Limited data exists on the precursor B-cell compartment composition in bone marrow (BM).

Purpose of the Study:

  • To define normal age-related ranges for B-cell content and precursor B-cell distribution in pediatric BM.
  • To provide reference data for clinical diagnostics of B-cell differentiation defects.

Main Methods:

  • Utilized four-color flow cytometry to analyze B-cell compartment composition.
  • Examined specimens from 59 healthy children aged 14 days to 16 years.
  • Stratified participants into six age groups.

Main Results:

  • Observed significant age-related variations in B-cell maturation stages, most pronounced in children under two years.
  • Documented a shift from early-stage B-cells to mature B-cells with age.
  • Found significantly higher proportions of pro-B lymphocytes in neonates compared to other age groups.

Conclusions:

  • Physiological age-related variations in precursor B-cell composition significantly impact children under two years.
  • Accurate interpretation of immunophenotyping for suspected B-cell defects necessitates appropriate reference data.
Abstract

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