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Concentration of the CDCP1 protein in human cord plasma may serve as a predictor of hematopoietic stem and progenitor cell content

Journal article
Authors Sofia Frändberg
Julia Asp
B. Waldner
Jan Holgersson
Lars Palmqvist
Published in Stem Cell Research
Volume 29
Pages 24-27
ISSN 1873-5061
Publication year 2018
Published at Institute of Biomedicine, Department of Clinical Chemistry and Transfusion Medicine
Pages 24-27
Language en
Keywords CDCP1, Cord blood, Hematopoietic stem and progenitor cells, Proximity ligation assay
Subject categories Transfusion medicine, Clinical chemistry


Successful hematopoietic stem and progenitor cell (HSPC) transplantation rests upon reliable methods for their enumeration in sources such as cord blood (CB). Methods used today are costly, time consuming and exhaust the limited number of cells needed for transplantation. The aim of this study was to analyze if surplus plasma from CB contains biomarkers that can predict HSPC content in CB. Frozen, surplus plasma from 95 CB units was divided into two groups based on CD34+ cell concentration. Birth weight, gestation age, gender, mode of delivery, collection volume, nucleated cell count and colony forming unit assay results were available. Samples were analyzed with a proximity ligation assay covering 92 different proteins. Two-group t-test with p-values adjusted for false discovery rate (FDR) identified 5 proteins that significantly differed between the two groups. CDCP1 was the most significant (FDR adjusted p-value 0.006). Correlation with CDCP1 concentration was most significant for CD34+ concentration and nucleated cell count. Multivariate analysis showed that CD34 and gender seemed to influence the level of CDCP1. In conclusion, CDCP1 was identified as a potential biomarker of HSPC content in CB. The finding also warrants further investigation for a possible role of CDCP1 in regulating HSPC presence in CB. © 2018

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