In JoVE (1)
Other Publications (1)
Articles by Ana Marin Navarro in JoVE
Integreringsfri avledning av humane inducerte pluripotente stamceller ved bruk av Laminin 521 Matrix Elias Uhlin1, Ana Marin Navarro1,2, Harriet Rönnholm1, Kelly Day1, Malin Kele1, Anna Falk1 1Department of Neuroscience, Karolinska Institutet, 2Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet Robust avledning av humant indusert pluripotent stamceller (hiPS) celler ble oppnådd ved å bruke ikke-integrering av Sendai virus (SeV) vektor-mediert omprogrammering av dermale fibroblaster. HiPS-cellevedlikehold og klonal ekspansjon ble utført ved hjelp av xenofri og kjemisk definerte kulturbetingelser med rekombinant human laminin 521 (LN-521) matriks og essensielt E8 (E8) medium.
Other articles by Ana Marin Navarro on PubMed
Modulation of P53 C-terminal Acetylation by Mdm2, P14ARF, and Cytoplasmic SirT2 Molecular Cancer Therapeutics. Apr, 2013 | Pubmed ID: 23416275 Acetylation of C-terminal lysine residues in the p53 tumor suppressor is associated with increased stability and transcription factor activity. The function, protein level, and acetylation of p53 are downregulated by mdm2, which in its turn is inhibited by the p14(ARF) tumor suppressor. Here, we show that p14(ARF) increases the level of p53 acetylated at lysine 382 in a nuclear chromatin-rich fraction. Unexpectedly, this accumulation of p53AcK382 is dramatically enhanced in the presence of ectopic mdm2. In light of these observations, we propose that p14(ARF) increases the binding of p53-mdm2 complexes to chromatin, thereby limiting the access of protein deacetylases to p53. Supporting this notion, we show that p53AcK382 can be deacetylated in the cytoplasm and that sirtuin SirT2 catalyzes this reaction. These results help understand why inhibition of both SirT1 and SirT2 is needed to achieve effective activation of p53 by small-molecule sirtuin inhibitors.