Lipoproteins are particles in the blood which transport not only cholesterol and fats but also other lipids like sphingolipids. The purpose of this study is to investigate a type of sphingolipid, called deoxysphingolipid, in patients with diabetes who have nerve pain or neuropathy. These lipids can play a role in the development of diabetes complications, like neuropathy. We will investigate the role of this sphingolipid in the VLDL (Very Low Density Lipoprotein), LDL (Low Density Lipoprotein) and HDL (High Density Lipoprotein) in the development of nephropathy in diabetes. We will recruit patients with type 2 diabetes with or without neuropathy. Patients who volunteer for the study will be asked to donate a single blood sample to be used for isolation of lipoproteins. The sphingolipid composition of each lipoprotein class will be determined and the effect of the lipoproteins on the metabolism of cells in culture also determined.