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• W2035344372 abstract "For transcoronary progenitor cells’ administration, injections under flow arrest (over-the-wire balloon technique, OTW) are used universally despite lack of evidence for being required for cell delivery or being effective in stimulating myocardial engraftment. Flow-mediated endothelial rolling is mandatory for subsequent cell adhesion and extravasation. To optimize cell directing toward the coronary endothelium under maintained flow, the authors developed a cell-delivery side-holed perfusion catheter (PC). Thirty-four patients (36-69 years, 30 men) with primary stent-assisted angioplasty-treated anterior MI (peak TnI 151 [53-356]ng/dL, mean[range]) were randomly assigned to OTW or PC autologous 99Tc-extametazime-labeled bone marrow CD34+ cells (4.34 [0.92-7.54] × 106) administration at 6-14 days after pPCI (LVEF 37.1 [24-44]%). Myocardial perfusion (99mTc-MIBI) and labeled cells’ activity were evaluated (SPECT) at, respectively, 36-48 h prior to and 60 min after delivery. In contrast to OTW coronary occlusions, no intolerance or ventricular arrhythmia occurred with PC cells’ administration (P < .001). One hour after delivery, 4.86 [1.7-7.6]% and 5.05 [2.2-9.9]% activity was detected in the myocardium (OTW and PC, respectively, P = .84). Labeled cell activity was clearly limited to the (viable) peri-infarct zone in 88% patients, indicating that the infarct core zone may be largely inaccessible to transcoronary-administered cells. Irrespective of the transcoronary delivery method, only ≈5% of native (i.e., non-engineered) CD34+ cells spontaneously home to the injured myocardium, and cell retention occurs preferentially in the viable peri-infarct zone. Although the efficacy of cell delivery is not increased with the perfusion method, by avoiding provoking ischemic episodes PC offers a rational alternative to the OTW delivery." @default.
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• W2035344372 date "2010-12-14" @default.
• W2035344372 modified "2023-10-17" @default.
• W2035344372 title "Randomized transcoronary delivery of CD34+ cells with perfusion versus stop-flow method in patients with recent myocardial infarction: Early cardiac retention of 99mTc-labeled cells activity" @default.
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• W2035344372 doi "https://doi.org/10.1007/s12350-010-9326-z" @default.
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