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Functional pathway analysis in acute myeloid leukemia using single cell network profiling assay: Effect of specimen source (bone marrow or peripheral blood) on assay readouts
Author(s) -
Cesano Alessandra,
Rosen David B.,
O'Meara Pat,
Putta Santosh,
Gayko Urte,
Spellmeyer David C.,
Cripe Larry D.,
Sun Zhuoxin,
Uno Hajime,
Litzow Mark R.,
Tallman Martin S.,
Paietta Elisabeth
Publication year - 2012
Publication title -
cytometry part b: clinical cytometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 61
eISSN - 1552-4957
pISSN - 1552-4949
DOI - 10.1002/cyto.b.21007
Subject(s) - peripheral blood mononuclear cell , bone marrow , medicine , myeloid leukemia , concordance , myeloid , flow cytometry , biomarker , peripheral , leukemia , immunology , cancer research , biology , in vitro , biochemistry
Background: Single cell network profiling (SCNP) is used to simultaneously measure the effects of modulators on signaling networks at the single cell level. SCNP‐based biomarker assays predictive of response to induction therapy and relapse risk in acute myeloid leukemia (AML) patients are being developed. Such assays have typically used bone marrow (BM) as the sample source of blasts. Because circulating peripheral blasts are detectable in ∼65% of AML patients and peripheral blood (PB) sampling is less invasive than BM sampling, this study was performed to assess the effect of sample source on AML blasts signaling as measured in SCNP assay. Methods: SCNP using multiparametric flow cytometry was used to evaluate the activation state of intracellular signaling molecules in leukemic blasts under basal conditions and after treatment with modulators in 46 pairs of BM mononuclear cells/PB mononuclear cells. The relationship between readouts of modulated intracellular proteins (“nodes”) was measured using linear regression, Bland‐Altman method, and Lin's concordance correlation coefficient. Results: The majority (156/161) of signaling nodes show strong correlations between paired PB and BM samples independently from the statistical method used. Notable exceptions were two PB samples with almost undetectable levels of circulating blasts compared with paired BM samples. Conclusions: Our results demonstrate that specimen source (BM or PB) does not significantly affect proteomic signaling in patients with AML and circulating blasts. The ability to use PB as a sample source will facilitate the monitoring of cellular signaling effects following administration of targeted therapies and at time points when BM aspirates are not clinically justifiable. © 2012 International Clinical Cytometry Society