PMID- 22351927 OWN - NLM STAT- MEDLINE DCOM- 20120501 LR - 20230313 IS - 1540-8140 (Electronic) IS - 0021-9525 (Print) IS - 0021-9525 (Linking) VI - 196 IP - 4 DP - 2012 Feb 20 TI - IKKalpha and alternative NF-kappaB regulate PGC-1beta to promote oxidative muscle metabolism. PG - 497-511 LID - 10.1083/jcb.201108118 [doi] AB - Although the physiological basis of canonical or classical IkappaB kinase beta (IKKbeta)-nuclear factor kappaB (NF-kappaB) signaling pathway is well established, how alternative NF-kappaB signaling functions beyond its role in lymphoid development remains unclear. In particular, alternative NF-kappaB signaling has been linked with cellular metabolism, but this relationship is poorly understood. In this study, we show that mice deleted for the alternative NF-kappaB components IKKalpha or RelB have reduced mitochondrial content and function. Conversely, expressing alternative, but not classical, NF-kappaB pathway components in skeletal muscle stimulates mitochondrial biogenesis and specifies slow twitch fibers, suggesting that oxidative metabolism in muscle is selectively controlled by the alternative pathway. The alternative NF-kappaB pathway mediates this specificity by direct transcriptional activation of the mitochondrial regulator PPAR-gamma coactivator 1beta (PGC-1beta) but not PGC-1alpha. Regulation of PGC-1beta by IKKalpha/RelB also is mammalian target of rapamycin (mTOR) dependent, highlighting a cross talk between mTOR and NF-kappaB in muscle metabolism. Together, these data provide insight on PGC-1beta regulation during skeletal myogenesis and reveal a unique function of alternative NF-kappaB signaling in promoting an oxidative metabolic phenotype. FAU - Bakkar, Nadine AU - Bakkar N AD - Department of Molecular Virology, Immunology, and Medical Genetics, Human Cancer Genetics Program, The Ohio State University, Columbus, OH 43210, USA. FAU - Ladner, Katherine AU - Ladner K FAU - Canan, Benjamin D AU - Canan BD FAU - Liyanarachchi, Sandya AU - Liyanarachchi S FAU - Bal, Naresh C AU - Bal NC FAU - Pant, Meghna AU - Pant M FAU - Periasamy, Muthu AU - Periasamy M FAU - Li, Qiutang AU - Li Q FAU - Janssen, Paul M L AU - Janssen PM FAU - Guttridge, Denis C AU - Guttridge DC LA - eng GR - R01 AR052787/AR/NIAMS NIH HHS/United States GR - AR052787/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - J Cell Biol JT - The Journal of cell biology JID - 0375356 RN - 0 (NF-kappa B) RN - 0 (Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha) RN - 0 (Ppargc1a protein, mouse) RN - 0 (Trans-Activators) RN - 0 (Transcription Factors) RN - EC 1.13.12.- (Luciferases) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.10 (I-kappa B Kinase) SB - IM CIN - Nat Rev Mol Cell Biol. 2012 Apr;13(4):206. PMID: 22414895 MH - Animals MH - Blotting, Western MH - *Cell Respiration MH - Cells, Cultured MH - Chromatin Immunoprecipitation MH - Electrophoretic Mobility Shift Assay MH - Gene Expression Regulation MH - I-kappa B Kinase/*metabolism MH - Immunoenzyme Techniques MH - Luciferases/metabolism MH - Mice MH - Mitochondria/metabolism MH - Muscle Development/*physiology MH - Muscle, Skeletal/cytology/*metabolism MH - Myoblasts/cytology/*metabolism MH - NF-kappa B/genetics/*metabolism MH - Oxidation-Reduction MH - Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha MH - Signal Transduction MH - TOR Serine-Threonine Kinases/metabolism MH - Trans-Activators/genetics/metabolism MH - Transcription Factors PMC - PMC3284000 EDAT- 2012/02/22 06:00 MHDA- 2012/05/02 06:00 PMCR- 2012/08/20 CRDT- 2012/02/22 06:00 PHST- 2012/02/22 06:00 [entrez] PHST- 2012/02/22 06:00 [pubmed] PHST- 2012/05/02 06:00 [medline] PHST- 2012/08/20 00:00 [pmc-release] AID - jcb.201108118 [pii] AID - 201108118 [pii] AID - 10.1083/jcb.201108118 [doi] PST - ppublish SO - J Cell Biol. 2012 Feb 20;196(4):497-511. doi: 10.1083/jcb.201108118.