BACKGROUND: The quantification of circulating endothelial cells (CECs) in whole blood has evolved as a novel method for the assessment of endothelial function, although major methodological issues remain. We hypothesized that there is a temporal decline in CEC counts in static venesected blood and that venepuncture itself may lead to increased CEC detachment. METHODS: CEC isolation was performed using the immunobead method. For the temporal decline experiment, we included 52 patients presenting with acute coronary syndrome (ACS). We performed CEC counts immediately and at 4 and 24 h later. For the venepuncture decline experiment, we studied 40 patients with stable cardiovascular disease (CVD). CEC counts were determined from the first 4 mL of aspirated venous blood and compared with counts obtained from a subsequent 4 mL sample of blood after at least 7.5 mL of blood had been collected. RESULTS: Among the ACS patients there was a significant temporal decline in CEC counts in static venous blood over a 24 h period (p = 0.013). Among the patients with stable CVD, the median CEC counts obtained from the initial 4 mL of aspirated venous blood were significantly higher (by 32%) than that obtained from the later 4 mL of aspirated venous blood (p = 0.041). CONCLUSIONS: We demonstrated a significant temporal fall in CEC numbers in static venous blood over 24 h following venesection. Furthermore, we have shown that CEC counts are higher in the initial aspirated blood compared with that aspirated from the same needle subsequently. These data would have implications for how CEC determination is undertaken by researchers in studies related to ACS or CVD.
BACKGROUND: The quantification of circulating endothelial cells (CECs) in whole blood has evolved as a novel method for the assessment of endothelial function, although major methodological issues remain. We hypothesized that there is a temporal decline in CEC counts in static venesected blood and that venepuncture itself may lead to increased CEC detachment. METHODS: CEC isolation was performed using the immunobead method. For the temporal decline experiment, we included 52 patients presenting with acute coronary syndrome (ACS). We performed CEC counts immediately and at 4 and 24 h later. For the venepuncture decline experiment, we studied 40 patients with stable cardiovascular disease (CVD). CEC counts were determined from the first 4 mL of aspirated venous blood and compared with counts obtained from a subsequent 4 mL sample of blood after at least 7.5 mL of blood had been collected. RESULTS: Among the ACS patients there was a significant temporal decline in CEC counts in static venous blood over a 24 h period (p = 0.013). Among the patients with stable CVD, the median CEC counts obtained from the initial 4 mL of aspirated venous blood were significantly higher (by 32%) than that obtained from the later 4 mL of aspirated venous blood (p = 0.041). CONCLUSIONS: We demonstrated a significant temporal fall in CEC numbers in static venous blood over 24 h following venesection. Furthermore, we have shown that CEC counts are higher in the initial aspirated blood compared with that aspirated from the same needle subsequently. These data would have implications for how CEC determination is undertaken by researchers in studies related to ACS or CVD.
Authors: Andrew D Blann; Alexander Woywodt; Francesco Bertolini; Todd M Bull; Jill P Buyon; Robert M Clancy; Marion Haubitz; Robert P Hebbel; Gregory Y H Lip; Patrizia Mancuso; Jose Sampol; Anna Solovey; Françoise Dignat-George Journal: Thromb Haemost Date: 2005-02 Impact factor: 5.249
Authors: A Woywodt; A D Blann; T Kirsch; U Erdbruegger; N Banzet; M Haubitz; F Dignat-George Journal: J Thromb Haemost Date: 2006-03 Impact factor: 5.824
Authors: Elliott M Antman; Daniel T Anbe; Paul Wayne Armstrong; Eric R Bates; Lee A Green; Mary Hand; Judith S Hochman; Harlan M Krumholz; Frederick G Kushner; Gervasio A Lamas; Charles J Mullany; Joseph P Ornato; David L Pearle; Michael A Sloan; Sidney C Smith; Joseph S Alpert; Jeffrey L Anderson; David P Faxon; Valentin Fuster; Raymond J Gibbons; Gabriel Gregoratos; Jonathan L Halperin; Loren F Hiratzka; Sharon Ann Hunt; Alice K Jacobs Journal: Circulation Date: 2004-08-31 Impact factor: 29.690
Authors: Aun Yeong Chong; Andrew D Blann; Jeetesh Patel; Bethan Freestone; Elizabeth Hughes; Gregory Y H Lip Journal: Circulation Date: 2004-09-13 Impact factor: 29.690
Authors: V J Karthikeyan; Andrew D Blann; Sabah Baghdadi; Deirdre A Lane; D Gareth Beevers; Gregory Y H Lip Journal: Clin Res Cardiol Date: 2011-01-09 Impact factor: 5.460
Authors: Frank Timmermans; Jean Plum; Mervin C Yöder; David A Ingram; Bart Vandekerckhove; Jamie Case Journal: J Cell Mol Med Date: 2009-01 Impact factor: 5.310