Reference range of naïve T and T memory lymphocyte subsets in peripheral
blood of healthy adult
Abstract
Abstract: Background: Naïve T and T memory cell subsets can provide
important information for the diagnosis and treatment of immunological
and hematological disorders. Lymphocyte compartment undergo dramatic
changes during adulthood; age-related reference values derived from
healthy individuals are crucial. However, extensively detailed
immunophenotyping reference values of peripheral blood lymphocytes in
whole spectrum of adulthood performed by flow cytometry-based
single-platform method are rare. Methods: 309 healthy adult volunteers
were recruited from Tianjin in China. The absolute counts and
percentages of CD3+CD4+ T cells, CD3+CD8+ T cells, naïve T cells (Tn), T
memory stem cells (Tscm), central memory T cells (Tcm), effector memory
T cells (Tem), terminal effector T cells (Tte) were determined by flow
cytometry with single platform technologies. Results: Reference range of
absolute counts and percentage of lymphocyte subsets were formulated by
different age and gender. We also find out the changing regularity of
them: the cells which have stem cell properties, Tn and Tscm cells,
decrease with aging; memory cell subsets, Tcm and Tem increase with
aging, which increase from 18 to 64 years old and present no significant
change over the 65 years old. Gender have influence on the fluctuation
of lymphocyte subsets, absolute count of CD3+CD8+, CD8+ Tcm, CD8+ Tem in
male are higher than that in female. Conclusion: The reference values of
percentages and absolute numbers of naïve T and T memory cell subsets
can help doctors to understand the immune state of patients and to
evaluate conditions of prognosis then adjust treatment for patients.