title: Skeletal muscle cell MHC I expression: implications for statin-induced myopathy.
abstract: Statins can induce necrotizing or inflammatory myopathies in some patients. Increased major histocompatibility complex class I (MHC I) expression has been shown in muscle biopsies of statin-induced myopathy. Therefore, we investigated the effect of statins on the expression of MHC I in muscle cells. Using flow cytometry and polymerase chain reaction (PCR), the rhabdomyosarcoma cell line TE671 and primary cultured skeletal muscle cells (SKMC) were investigated for MHC I expression after incubation with different statins and/or interferon-gamma (IFN-gamma). TE671 and SKMC express MHC I in the untreated condition. Statins alone reduced the expression of MHC I in SKMC and had no effect on MHC I in TE671 cells. Statins potentiated the MHC I-inducing effect of IFN-gamma in TE671, but not in SKMC, neither at the protein level nor at the mRNA level. The increased muscle MHC I expression in statin-induced myopathy might not be induced directly by statins themselves.
authors.affiliation: Department of Neurology, Justus-Liebig-University, Am Steg 14, D-35392 Giessen, Germany.
authors.forename: Pratibha
authors.initials: P
authors.lastname: Singh
authors.forename: Danielle
authors.initials: D
authors.lastname: Kohr
authors.forename: Manfred
authors.initials: M
authors.lastname: Kaps
authors.forename: Franz
authors.initials: F
authors.lastname: Blaes
mesh_terms: D045744:Cell Line, Tumor; D002478:Cells, Cultured; D005786:Gene Expression Regulation / Q000187:drug effects; D005805:Genes, MHC Class I / Q000502:physiology; D006680:HLA Antigens / Q000378:metabolism*; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000009:adverse effects* / Q000494:pharmacology; D007371:Interferon-gamma / Q000494:pharmacology; D019042:Muscle Neoplasms / Q000378:metabolism / Q000473:pathology; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology; D009135:Muscular Diseases / Q000139:chemically induced* / Q000378:metabolism* / Q000473:pathology; D012208:Rhabdomyosarcoma / Q000378:metabolism / Q000473:pathology
chemical_list: D006680:HLA Antigens; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D007371:Interferon-gamma