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Purpose: Previously we have shown that cholesterol-rich microemulsions that bind to LDL receptors have the ability to concentrate in acute myeloid leukemia cells and in ovarian and breast carcinomas. Thus, LDE may be used as a vehicle for drugs directed against neoplastic cells. Indeed, we subsequently showed that when carmustine is associated with LDE the toxicity of the drug is significantly reduced in patients with advanced cancers. The aim of the present study was to verify whether LDE may be taken up by multiple myeloma cells and whether patients with multiple myeloma respond to treatment with LDE associated with carmustine.Methods: A total of 131 consecutive volunteer patients with recently diagnosed multiple myeloma classified as clinical stage IIIA had their plasma lipid profile determined. LDE plasma kinetics were performed in 14 of them. Cell uptake of LDE and the cytotoxicity of …