Non-ischaemic titrated cardiac injury caused by radiofrequency catheter ablation of atrial fibrillation mobilizes CD34-positive mononuclear cells by non-stromal cell-derived factor-1alpha mechanism.

Abstract

AIMS It has been known that myocardial ischaemia mobilizes CD34+ bone marrow-derived cells by the stromal cell-derived factor (SDF)-1alpha pathway. We hypothesized that non-ischaemic titrated cardiac injury caused by radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF) recruits CD34+ cells by an alternative mechanism. METHODS AND RESULTS Fifty-six patients (39 males, 53.0 +/- 13.5 years old) who underwent electrophysiology study (EPS; n = 10) or RFCA of AF (n = 46) were included. Peripheral blood CD34+ cell count and multiple serologic markers were evaluated before, immediately after, at 24 h, and 10 days after the procedure. The results are as follows: (i) the per cent increase in CD34+ cells (%DeltaCD34+) was significant after RFCA compared with after EPS (P < 0.01), and correlated with RF duration and troponin I, respectively. (ii) In contrast, SDF-1alpha decreased after RFCA and had no correlation with %DeltaCD34+ cells while matrix metalloproteinase (MMP)-9 (P < 0.0001) and GRObeta (P < 0.001) increased after RFCA and had correlations with 24 h %DeltaCD34+ cells. CONCLUSION Non-ischaemic titrated cardiac injury caused by AF ablation mobilizes CD34+ cells to the peripheral blood through a non-SDF-1alpha pathway associated with MMP-9 and GRObeta.

DOI: 10.1093/europace/eup185

Cite this paper

@article{Kim2009NonischaemicTC, title={Non-ischaemic titrated cardiac injury caused by radiofrequency catheter ablation of atrial fibrillation mobilizes CD34-positive mononuclear cells by non-stromal cell-derived factor-1alpha mechanism.}, author={Sook Kyoung Kim and Hui-Nam Pak and Jae Hyung Park and Jong Il Choi and Myung-Hyun Nam and Yunjung Jo and Young-Hoon Kim}, journal={Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology}, year={2009}, volume={11 8}, pages={1024-31} }