Statins upregulate small GTP-binding protein GDP dissociation stimulator (SmgGDS) in humans. A, Protein levels of SmgGDS in circulating human polymorphonuclear leukocytes. Crossover oral treatment with pravastatin (PRA, 20 mg/d for 2 weeks) or atorvastatin (ATOR, 20 mg/d for 2 weeks) significantly increased the SmgGDS level (n=20). B and C, Significant correlation between changes in SmgGDS and those in malondialdehyde (MDA)–low-density lipoprotein (LDL)-cholesterol. D and E, No correlation between changes in SmgGDS and those in LDL-cholesterol (n=20). Results are expressed as mean±SD.