A new single-platform method for the enumeration of CD34+ cells

Area of Science:

• Hematology
• Immunology
• Biotechnology

Background:

• Flow cytometry is crucial for enumerating CD34(+) hematopoietic stem cells (HSC).
• Single-platform assays are recommended for accurate HSC enumeration.
• The BD Biosciences SCE kit is a new commercial option for HSC enumeration.

Purpose of the Study:

• To evaluate the performance of the new BD Biosciences SCE kit.
• To compare SCE kit results with established diagnostic kits for CD34(+) cell enumeration.
• To assess the practical advantages and disadvantages of the SCE kit.

Main Methods:

• Comparison of CD34(+) cell enumeration using the SCE kit versus existing diagnostic kits.
• Assay of fresh and thawed peripheral blood, apheresis, cord blood (CB), and bone marrow (BM) samples.
• Evaluation of correlation coefficients (r(2)) and practical workflow aspects.

Main Results:

• The SCE kit demonstrated strong correlation (r(2) >= 0.9) with older assays for CD34(+) enumeration.
• Practical benefits include enumeration of viable CD34(+) cells across all HSC products and elimination of bead pipetting.
• A key limitation is the absence of dedicated software for data analysis and reporting.

Conclusions:

• The SCE kit provides reliable CD34(+) HSC enumeration comparable to existing methods.
• Its practical advantages enhance precision and applicability across diverse sample types.
• Development of specific data analysis software is recommended to fully leverage the kit's potential.