Orlic, D. et al. Mobilized bone marrow cells repair the infarcted heart, improving function and survival.
These cells can be used to regenerate bone and articular cartilage, skeletal and cardiac muscle; they can repopulate bone marrow and repair peripheral nerve structures.
The only other option was to visit Germany where revolutionary stem cell trials, which involve using a patient's own bone marrow to repair damaged heart muscle, were taking place.
Future studies are needed to address the role of subchondral hemostasis and polymer clearance in marrow stimulation repair.
Taken together, these data suggest that loss of Cxcr2 function results in impaired bone marrow endothelial repair, which ultimately results in delayed bone marrow haematopoietic reconstitution following BMT.
Several research work have discussed the use of bone marrow cells to repair infarcted myocardium [ 15, 16], repair of spinal cord injuries [ 17- 19] and in treatment of large cartilage defects [ 4].
As with the idea of using bone marrow cells to repair the heart, however, it is not clear why a patient's body does not spontaneously draw on this repair system, if it is already in place.
The SD technique could not control the number of cells, mesenchymal cell type, or flow direction of marrow on the repair site, leading to the poorer results in this experiment.
The major difference is that in bone marrow cells DSB repair begins immediately after DSBs have accumulated, whereas ascites cells show an extended period, when the number of DSBs stays constant (12 24 h), and only during the period of 24 36 h does the DSB repair occur.
The histological correlate of the rather imprecise MRI finding of 'fatty lesions' is not clear at this moment, but probably reflects replacement of subchondral bone marrow by some repair tissue through expansion and/or activation of mesenchymal cells such as adipocytes, fibroblasts and osteoblasts.
