Design and optimization of a polychromatic tube of flow cytometry for peripheral lymphocyte immunophenotype

Authors

Keywords:

flow cytometry, lymphocyte subgroups, T lymphocytes, B lymphocytes, natural killers, peripheral lymphocyte immunophenotype.

Abstract

Introduction: Flow cytometry allows quantification of lymphocyte subpopulations with high sensitivity, specificity and objectivity. These advantages are only achieved through the
hardworking process of individualized and controlled design for each experiment.

Objective: To design a flow cytometry protocol of a single polychromatic tube for peripheral lymphocyte immunophenotype.

Methods: An experimental in vitro study was carried out, in March 2019, with peripheral blood samples obtained from three healthy volunteers, at the National Center for Medical Genetics. The tube was made up of six lineage markers for identifying natural B and T lymphocytes, natural killers and natural killer T cells. A protocol was developed for red blood cell lysis without washing. Fluorochrome-conjugated monoclonal antibodies were used. The optimal point of concentration corresponded to the highest staining index and preservation of the positivity percentages of each population. Progressive tube construction was performed and a logical window sequence strategy was proposed for data analysis.

Results: The chosen markers allowed to carry out correct peripheral lymphocyte immunophenotype. Good discriminations between positive and negative signals were observed at the five titration points, except for anti-CD56, which presented a decreasing trend in the staining index. The total volume of conjugates required for determination of the six antigens was 3.75 μL per tube.

Conclusions: A polychromatic tube was obtained that allows to carry out peripheral immunophenotype quickly and precisely by six lymphocyte antigens simultaneously, with the use of small volumes of conjugate and blood.



Author Biographies

Yaima Zúñiga Rosales, Centro Nacional de Genética Médica

Especialista de Primer Grado en Inmunología. Profesor asistente e investigador agregado. ICBP “Victoria de Girón”, Centro Nacional de Genética Médica, La Habana, Cuba

Carlos Villegas Valverde, Instituto Nacional de Oncología y Radiobiología

Especialista de Segundo Grado en Inmunología. Profesor e investigador auxiliar. Instituto Nacional de Oncología y Radiobiología, La Habana, Cuba.

Bárbara Torres Rives, Centro Nacional de Genética Médica

Especialista de Segundo Grado en Inmunología. Profesor e investigador auxiliar. ICBP “Victoria de Girón”, Centro Nacional de Genética Médica, La Habana, Cuba.

Evelyn Hernández Reyes, Centro Nacional de Genética Médica

Técnico en Inmunoalergia. Centro Nacional de Genética Médica. Centro Nacional de Genética Médica, La Habana, Cuba.

Published

2020-12-04

How to Cite

1.
Zúñiga Rosales Y, Villegas Valverde C, Torres Rives B, Hernández Reyes E. Design and optimization of a polychromatic tube of flow cytometry for peripheral lymphocyte immunophenotype. Rev Cubana Hematol Inmunol Hemoter [Internet]. 2020 Dec. 4 [cited 2024 Dec. 22];36(3). Available from: https://revhematologia.sld.cu/index.php/hih/article/view/1151

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