When these more conservative treatments fail, another recently developed nonoperative option is available. The genetically engineered platelet-derived growth factor becaplermin (Regranex Gel, OMJ Pharmaceuticals, Inc.) is approved for use on neuropathic diabetic foot ulcers and can expedite healing. Growth factors stimulate chemotaxis and mitogenesis of neutrophils, fibroblasts, and monocytes, as well as other components that form the cellular basis of wound healing.