IMMUNOPHENOTYPING OF HEMATOPOIETIC PROGENITOR CELLS BY MULTIPARAMETER FLOW CYTOMETRY.

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IMMUNOPHENOTYPING OF HEMATOPOIETIC PROGENITOR CELLS BY MULTIPARAMETER FLOW CYTOMETRY

PROTOCOLS FOR CD34 COUNT Main Features Mulhouse All cells acquired, FSC vs SSC and SSC vs CD34 Milan All cells acquired, FSC vs SSC and SSC vs CD34 Nordic All cells acquired, FSC vs SSC and SSC vs CD34 ISHAGE CD45 + cells acquired, CD45 vs SSC, CD34 vs SSC, CD45 vs SSC, FSC vs SSC ProCount CD34 bright cells acquired, DNA vs SSC, CD45 vs SSC, DNA vs CD34

ISHAGE PROTOCOL CD45 SSC R1 CD34 SSC R2 CD45 SSC FSC SSC R3 R4 gated on R1 and R2gated on R1 and R2 and R3 gated on R1

SSC CD34 R2 SSC FSC MILAN PROTOCOL R1

RPCI PROTOCOL SSC CD34 R1 R2 gated on R1 OR R2 FSC SSC CD45 SSC gated on R1 AND R2 AND R3 R4R5R6 R3 SSC CD34 R1 R2 FSC SSC CD45 SSC R4R5R6 R3

SIDE SCATTER FORWARD SCATTER R1

SSC CD34 MOSTLY BRIGHT AVERAGE BRIGHT MOSTLY DIM

Comparison of Gating Strategies %CD34 positive* RPCI1.33 ± 1.44 ISHAGE0.87 ± 1.30 ISHAGE (no CD45 gate)1.35 ± 1.44 *n = 80

What CD34 Count is Important? Protocol to Use Pre or Post Thaw Count?Any CD34 bright? or CD34 dim?RPCI CD45 + ? CD45 - ?Any, except ISHAGE

CD34 SSC CD14 CD45 threshold

GATED ON R1 GATED ON R1 AND R3 SSC CD14 GATED ON R2 CD45 R4R5R9 R6R7R8 R4R5R9 R6R7R8 R10R11R15 R12R13 R14 SSC FSC CD45 FSC GATED ON R2 AND R3 CD14 R3 UNGATED R1 R2 CD34 FSC

FREQUENCY OF PATIENTS EXPRESSING CD34 BRIGHT HPCs CD34 BRIGHT (%TOTAL CD34+ HPCs) PERCENT OF PATIENTS

CD45 EXPRESSION ON HPCs PERCENT

Proportion of Subset in CD34+ Population % of Subset in CD34+ Population CD38 HLADr -/--/++/-+/+-/--/++/- CD45RO CD45RA +/+

Proportion of Subset Cells in CD34+ Population % of Subset CD34+

Measurement of CD34 Subset Proliferation Hoechst numbernumber numbernumber numbernumber numbernumber HLADr TCHLADr TC CD38 FITC

C-KIT RECEPTOR EXPRESSION ON HPC SUBSETS CD117 H L A D r CD38