Immunophenotype was performed on heparinized peripheral blood samples obtained from each patient by means of flow cytometry. 100 μL of blood were stained with two multicolour antibody panels in order to evaluate different lymphocyte subsets, including B cell subpopulations (naïve follicular B cells, marginal zone B cells, switched memory B cells and transitional B cells) and recent thymic emigrants (RTE).
Panel for B cells analysis contained the following antibodies:
anti-CD45,
anti-CD19,
anti-CD38 (Becton Dickinson),
anti-CD27,
anti-IgM,
anti-IgG,
anti-CD21, anti-CD10 and
anti-IgD (Miltenyi Biotec).
Panel for RTE analysis contained the following antibodies:
anti-CD45,
anti-CD19,
anti-CD4,
anti-CD8 (Becton Dickinson),
anti-CD3,
anti-CD45RA,
anti-CD31,
anti-CD16 and
anti-CD56 (Miltenyi Biotec).
Samples were acquired with
MACSQuant Analyzer 10 (Miltenyi Biotec) and analyzed with
FlowLogic software (version 7.2.1, Inivai Technologies).
Girardelli M., Valencic E., Moressa V., Margagliotta R., Tesser A., Pastore S., Spadola O., Athanasakis E., Severini G.M., Taddio A, & Tommasini A. (2021). Genetic and immunologic findings in children with recurrent aphthous stomatitis with systemic inflammation. Pediatric Rheumatology Online Journal, 19, 70.