|
1
|
De Luca V, Leo M, Cretella E, Montanari A, Saliola M, Ciaffi G, Vecchione A, Stoppacciaro A, Filetici P. Role of yUbp8 in Mitochondria and Hypoxia Entangles the Finding of Human Ortholog Usp22 in the Glioblastoma Pseudo-Palisade Microlayer. Cells 2022; 11:cells11101682. [PMID: 35626719 PMCID: PMC9140154 DOI: 10.3390/cells11101682] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/05/2022] [Accepted: 05/17/2022] [Indexed: 02/01/2023] Open
Abstract
KAT Gcn5 and DUB Ubp8 are required for respiration and mitochondria functions in budding yeast, and in this study we show that loss of respiratory activity is acquired over time. Interestingly, we show that absence of Ubp8 allows cells to grow in hypoxic conditions with altered mitophagy. Comparatively, the aggressive glioblastoma (GBM) multiforme tumor shows survival mechanisms able to overcome hypoxia in the brain. Starting from yeast and our findings on the role of Ubp8 in hypoxia, we extended our analysis to the human ortholog and signature cancer gene Usp22 in glioblastoma tumor specimens. Here we demonstrate that Usp22 is localized and overexpressed in the pseudo-palisade tissue around the necrotic area of the tumor. In addition, Usp22 colocalizes with the mitophagy marker Parkin, indicating a link with mitochondria function in GBM. Collectively, this evidence suggests that altered expression of Usp22 might provide a way for tumor cells to survive in hypoxic conditions, allowing the escape of cells from the necrotic area toward vascularized tissues. Collectively, our experimental data suggest a model for a possible mechanism of uncontrolled proliferation and invasion in glioblastoma.
Collapse
Affiliation(s)
- Veronica De Luca
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (V.D.L.); (M.L.); (E.C.); (A.M.); (M.S.)
| | - Manuela Leo
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (V.D.L.); (M.L.); (E.C.); (A.M.); (M.S.)
| | - Elisabetta Cretella
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (V.D.L.); (M.L.); (E.C.); (A.M.); (M.S.)
| | - Arianna Montanari
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (V.D.L.); (M.L.); (E.C.); (A.M.); (M.S.)
| | - Michele Saliola
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (V.D.L.); (M.L.); (E.C.); (A.M.); (M.S.)
| | - Gabriele Ciaffi
- Department of Clinical and Molecular Medicine, Sant’ Andrea Hospital, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (G.C.); (A.V.)
| | - Andrea Vecchione
- Department of Clinical and Molecular Medicine, Sant’ Andrea Hospital, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (G.C.); (A.V.)
| | - Antonella Stoppacciaro
- Department of Clinical and Molecular Medicine, Sant’ Andrea Hospital, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; (G.C.); (A.V.)
- Correspondence: (A.S.); (P.F.); Tel.: +39-06-3377-6102 (A.S.)
| | - Patrizia Filetici
- Institute of Molecular Biology and Pathology—CNR, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
- Correspondence: (A.S.); (P.F.); Tel.: +39-06-3377-6102 (A.S.)
| |
Collapse
|
|
2
|
Grant PA, Winston F, Berger SL. The biochemical and genetic discovery of the SAGA complex. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2020; 1864:194669. [PMID: 33338653 DOI: 10.1016/j.bbagrm.2020.194669] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 12/12/2022]
Abstract
One of the major advances in our understanding of gene regulation in eukaryotes was the discovery of factors that regulate transcription by controlling chromatin structure. Prominent among these discoveries was the demonstration that Gcn5 is a histone acetyltransferase, establishing a direct connection between transcriptional activation and histone acetylation. This breakthrough was soon followed by the purification of a protein complex that contains Gcn5, the SAGA complex. In this article, we review the early genetic and biochemical experiments that led to the discovery of SAGA and the elucidation of its multiple activities.
Collapse
Affiliation(s)
- Patrick A Grant
- Department of Biomedical Science, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL 33431, United States of America
| | - Fred Winston
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, United States of America.
| | - Shelley L Berger
- Department of Cell and Developmental Biology, Penn Epigenetics Institute, Department of Biology, Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States of America
| |
Collapse
|