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Developmental changes in lymphocyte surface markers.

E Walcz, I Seri, D Kuti

    Acta Paediatrica Academiae Scientiarum Hungaricae
    |January 1, 1982
    PubMed
    Summary
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    Neonates have lower percentages but higher absolute numbers of T- and B-lymphocytes compared to adults. This study establishes normal immune cell values for infants, crucial for understanding their susceptibility to infections.

    Area of Science:

    • Immunology
    • Neonatal Research
    • Pediatric Health

    Background:

    • Neonates and infants exhibit heightened susceptibility to infections compared to older age groups.
    • Understanding baseline immune cell parameters in neonates is critical for assessing immune function and health outcomes.

    Purpose of the Study:

    • To establish normal reference values for T-lymphocyte (TG) and TM cells in neonates and infants.
    • To determine T- and B-lymphocyte ratios in this vulnerable population.
    • To compare these values with those of adult populations.

    Main Methods:

    • Analysis of T-lymphocyte (TG) and TM cell percentages and absolute counts.
    • Determination of T- and B-lymphocyte ratios.
    • Assessment of spontaneous thymidine uptake and response to phytohemagglutinin (PHA).

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    Main Results:

    • Neonates showed significantly lower percentages but higher absolute numbers of T- and B-lymphocytes than adults.
    • The percentage of TG cells was significantly elevated in neonates compared to other age groups.
    • A significant decrease in the ratio of TM cells was observed in neonates versus adults.
    • Spontaneous thymidine uptake correlated inversely with age, though not significantly.
    • Response to a single PHA dose was similar across all age groups.

    Conclusions:

    • Established reference ranges for key immune cells in neonates and infants.
    • Highlighted significant differences in lymphocyte populations between neonates and adults.
    • Provided baseline data for further research into infant immunology and infection susceptibility.