Circulating Endothelial Cell Kinetic in Patients with Multiple Myeloma Who Receive Autologous Hematopoietic Stem Cell Transplantation

Anticancer Section / Original Paper

Annibali O.a· Tomarchio V.a· Gregorj C.a· Di Cerbo M.b· Armiento D.a· Antonelli L.a· Vincenzi B.c· Nobile C.Vacca M.b· Tirindelli M.C.b· Avvisati G.a

Author affiliations

aHematology and Stem Cell Transplantation, Fondazione Policlinico Campus Bio-Medico, Rome, Italy
bTransfusion Medicine and Cell Therapy, Fondazione Policlinico Campus Bio-Medico, Rome, Italy
cMedical Oncology, Department of Medicine, Università Campus Bio-Medico di Roma, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy

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Article / Publication Details

Received: October 26, 2022
Accepted: January 02, 2023
Published online: March 09, 2023

Number of Print Pages: 5
Number of Figures: 0
Number of Tables: 2

ISSN: 0009-3157 (Print)
eISSN: 1421-9794 (Online)

For additional information: https://www.karger.com/CHE

Abstract

Introduction: Neoangiogenesis has a crucial role in multiple myeloma (MM), and circulating endothelial cells (CECs) contribute to neovascularization by inducing tumor progression and metastasis and by repairing damage to bone marrow vasculature after stem cell transplantation (HSC). We recently proved in a national multicenter study the possibility to reach a high-level standardization in CEC count and analysis based on a polychromatic flow cytometry Lyotube (BD). Our study aimed at assessing the kinetics of CECs in patients with MM undergoing autologous hematopoietic stem cell transplantation (Au-HSCT). Methods: Blood samples for analysis were collected at different time points before (T0, T1) and after (T2, T3, T4) Au-HSCT. For each sample, 20 × 106 leukocytes were processed as already described (Lanuti 2016 e 2018) through a multistep procedure. CECs were eventually identified as 7-ADDneg/Syto16pos/CD45neg/CD34pos/CD146pos. Results: Twenty-six MM patients were enrolled in the study. Overall, we observed a constant increase of CECs values from T0 to T3 (day of neutrophil engraftment) followed by decrease at T4 (100 days after transplantation). Using the median value of CECs at T3, we could define a cut-off concentration of 618/mL, with patients with more infective complications having CECs above that value (9/13 vs. 2/13; p = 0.005). Conclusion: CECs value may be a function of endothelial damage caused by conditioning regimen, as suggested by the increase of their level during the engraftment period. A more severe endothelial damage is reflected by the increase of infective complications in patients with higher CECs value at T3.

© 2023 S. Karger AG, Basel

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Received: October 26, 2022
Accepted: January 02, 2023
Published online: March 09, 2023

Number of Print Pages: 5
Number of Figures: 0
Number of Tables: 2

ISSN: 0009-3157 (Print)
eISSN: 1421-9794 (Online)

For additional information: https://www.karger.com/CHE

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