Abstract
Charcot neuro-osteoarthropathy (CNO) is a devastating complication of diabetes characterized by increased local bone resorption mediated by osteoclasts. Often CNO leads to multiple fractures and joint destruction resulting in severe deformity of the foot. Osteoclasts are multinucleated cells that have a common precursor with monocytes/macrophages (1). Previously, we reported that the number of osteoclasts generated in vitro from circulating cells was higher in acute CNO patients compared with diabetic control subjects and was partially independent from receptor activator for NF-κB (RANK)-RANK ligand (RANKL), the main osteoclastogenic mediator (2). One hypothesis could be that the number of circulating osteoclast precursors is increased in CNO. Among all monocytes subpopulations, CD14-positive cells are the most potent to transform into bone-resorbing osteoclasts (3). We studied 11 diabetic patients with recent onset of acute CNO, 10 diabetic …
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