Establishing optimal lymphocyte gates for immunophenotyping by flow cytometry

Area of Science:

• Immunology
• Hematology
• Flow Cytometry

Background:

• Distinguishing lymphocyte populations from other leukocytes in peripheral blood is crucial for accurate immunological assessments.
• Traditional methods may face challenges in achieving precise cell population isolation and quantification.

Purpose of the Study:

• To establish a reliable method for accurately distinguishing and quantifying lymphocytes in peripheral blood samples.
• To optimize flow cytometry gating strategies for maximal lymphocyte recovery and purity.

Main Methods:

• Utilizing a combination of CD45/CD14 immunofluorescence and forward/orthogonal light scatter for cell identification.
• Establishing a light scattering window to encompass at least 98% of the target lymphocyte population.
• Employing immunofluorescence to define the purity of the established gate and identify non-lymphocytes.

Main Results:

• Accurate discrimination between lymphocytes and other leukocyte subsets was achieved.
• Maximal lymphocyte recovery (>= 98%) was consistently obtained through optimized gating.
• The method allowed for the accurate identification of non-lymphocytes within the gate, enabling precise percentage calculations.

Conclusions:

• The combined use of CD45/CD14 fluorescence and light scatter provides a robust approach for lymphocyte identification and quantification.
• This technique enhances the accuracy of flow cytometry analysis by accounting for non-lymphocyte interference.
• The established gating strategy ensures reliable and reproducible results in immunological studies.