title: Defining the action spectrum of potential PGC-1α activators on a mitochondrial and cellular level in vivo.
abstract: Previous studies have demonstrated a therapeutic benefit of pharmaceutical PGC-1α activation in cellular and murine model of disorders linked to mitochondrial dysfunction. While in some cases, this effect seems to be clearly associated with boosting of mitochondrial function, additional alterations as well as tissue- and cell-type-specific effects might play an important role. We initiated a comprehensive analysis of the effects of potential PGC-1α-activating drugs and pharmaceutically targeted the PPAR (bezafibrate, rosiglitazone), AMPK (AICAR, metformin) and Sirt1 (resveratrol) pathways in HeLa cells, neuronal cells and PGC-1α-deficient MEFs to get insight into cell type specificity and PGC-1α dependence of their working action. We used bezafibrate as a model drug to assess the effect on a tissue-specific level in a murine model. Not all analyzed drugs activate the PGC pathway or alter mitochondrial protein levels. However, they all affect supramolecular assembly of OXPHOS complexes and OXPHOS protein stability. In addition, a clear drug- and cell-type-specific influence on several cellular stress pathways as well as on post-translational modifications could be demonstrated, which might be relevant to fully understand the action of the analyzed drugs in the disease state. Importantly, the effect on the activation of mitochondrial biogenesis and stress response program upon drug treatment is PGC-1α dependent in MEFs demonstrating not only the pleiotropic effects of this molecule but points also to the working mechanism of the analyzed drugs. The definition of the action spectrum of the different drugs forms the basis for a defect-specific compensation strategy and a future personalized therapeutic approach.
authors: Institute for Genetics and Cluster of Excellence: Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Zülpicher Str. 47A, 50674 Cologne, Germany.
authors: Annette
authors: A
authors: Hofer
authors: Natalie
authors: N
authors: Noe
authors: Christin
authors: C
authors: Tischner
authors: Nikolay
authors: N
authors: Kladt
authors: Veronika
authors: V
authors: Lellek
authors: Astrid
authors: A
authors: Schauß
authors: Tina
authors: T
authors: Wenz
mesh_terms: D000620:Aminoimidazole Carboxamide / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D001629:Bezafibrate / Q000494:pharmacology; D006367:HeLa Cells; D006801:Humans; D008687:Metformin / Q000494:pharmacology; D051379:Mice; D024101:Mitochondrial Proteins / Q000235:genetics / Q000378:metabolism*; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D000077185:Resveratrol; D012265:Ribonucleotides / Q000494:pharmacology; D000077154:Rosiglitazone; D015398:Signal Transduction / Q000187:drug effects; D013267:Stilbenes / Q000494:pharmacology; D045162:Thiazolidinediones / Q000494:pharmacology; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
chemical_list: D024101:Mitochondrial Proteins; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; C485290:Ppargc1a protein, mouse; D012265:Ribonucleotides; D013267:Stilbenes; D045162:Thiazolidinediones; D014157:Transcription Factors; D000077154:Rosiglitazone; D000620:Aminoimidazole Carboxamide; D008687:Metformin; C031143:AICA ribonucleotide; D000077185:Resveratrol; D001629:Bezafibrate