Revascularization, cardiomyocyte preservation, stem cell homing, and increased myocardial strain likely all contributed to the repair.
The flight time for the homing trip increased with distance.
During both solo and pairwise training, individual homing efficiency increased as training progressed (nonlinear regression, Solo flights: r2 = 0.62, Paired flights: r2 = 0.47, Fig. 2A ), but the corresponding regression curves differed significantly (F-test, F 2,540) = 3.34, P = 0.036).
Patients with digital vascular lesions did not show a significant increased number of EPCs in accordance with previous data [ 45] and suggesting an increased homing at this stage.
Since EPCs represent a pool of cells which contribute to the endothelial repair after vascular injury, the increased homing and retention of these cells at the site of stent implantation may increase and speed up the process of endothelialization.
By minicircle microporation as a non-viral gene delivery, MSCs engineered to overexpress CXCR4 showed greatly increased homing ability toward an injury site as confirmed through in vivo bioluminescence imaging in mice.
In animal models, G-CSF based progenitor cell mobilization combined with a DPP4 inhibitor leads to increased homing of bone marrow derived progenitor cells to the injured myocardium via the SDF1/CXCR4 axis resulting in improved ejection fraction and survival after acute myocardial infarction (AMI).
Phage RMS-P3/RR showed a 2-fold increased homing to RD-FUR compared to RD and a 45-fold increased binding compared to RD-PDX tumors.
These findings suggest that the predilection of the RM1 BM) cells for bone is dependent upon other factors, potentially an increased homing to bony sites or dependence upon factors independent of bone lysis.
Nanofiber expanded stem cells express significantly more CXCR4 and high concentrations of SDF-1 in ischemic or damaged tissues, which may be responsible for increased homing as CXCR4 is a natural receptor for SDF-1 [43], [43].
