European Heart Journal Advance Access originally published online on August 15, 2006
European Heart Journal 2006 27(18):2247-2255; doi:10.1093/eurheartj/ehl198
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Circulating CD34+ cells, metabolic syndrome, and cardiovascular risk
1 Department of Clinical and Experimental Medicine, Division of Metabolic Diseases, University of Padua, Medical School, Padua, Italy
2 Department of Clinical and Experimental Medicine, Immunology and Hematology Branch, University of Padua, Medical School, Padua, Italy
Received 14 December 2005; revised 29 June 2006; accepted 27 July 2006; online publish-ahead-of-print 15 August 2006.
* Corresponding author. Dipartimento di Medicina Clinica e Sperimentale, Divisione di Malattie del Metabolismo, Policlinico Universitario, v. Giustiniani 2, 35100 Padova, Italy. Tel: +39 049 8212185; fax: +39 049 8212184. E-mail address: angelo.avogaro{at}unipd.it
Aims Circulating progenitor cells are believed to participate in cardiovascular (CV) homeostasis and their exhaustion has been linked to CV damage. As general agreement on their characterization is lacking, this work was carried out to assess the relationships between different antigenic profiles of progenitor cells and CV risk, with special regard to metabolic syndrome (MetSyn).
Methods and results CD34, CD133, and KDR were used to quantify circulating progenitors in 214 subjects at different levels of CV risk. In a cross-analysis of six different cell subtypes (CD34+, CD133+, CD34+CD133+, CD34+KDR+, CD133+KDR+, and CD34+CD133+KDR+), CD34+ progenitors showed the best correlation with CV parameters and risk estimates. Components of the MetSyn were all characterized by reduction of CD34+ cells and acted synergistically in decreasing CD34+ cell count. Moreover, CD34+ cell count demonstrated a high performance in detecting high CV risk.
Conclusion These data demonstrate that CD34 identifies progenitor cells linked to CV risk, showing a close negative correlation between CD34+ cells and CV risk, as well as a synergic detrimental effect of clustered metabolic components. Progenitor cell count may be used as a surrogate marker of CV risk, whereas extensive antigenic characterization may not be useful for this purpose.
Key Words: Endothelial progenitor cells Stem cells Cardiovascular risk Metabolic syndrome
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