| Yazarlar |
Randa Tao
Türkiye |
|
Mitchell C Coleman
Türkiye |
|
J Daniel Pennington
Türkiye |
Prof. Dr. Özkan ÖZDEN
Kafkas Üniversitesi, Türkiye |
|
Seong-Hoon Park
Türkiye |
|
Haiyan Jiang
Türkiye |
|
Hyun-Seok Kim
Türkiye |
|
Charles Robb Flynn
Türkiye |
|
Salisha Hill
Türkiye |
|
Mcdonald W Hayes
Türkiye |
|
Alicia K Olivier
Türkiye |
|
Douglas R Spitz
Türkiye |
|
David Gius
Türkiye |
| Özet |
| Genetic deletion of the mitochondrial deacetylase sirtuin-3 (Sirt3) results in increased mitochondrial superoxide, a tumor-permissive environment, and mammary tumor development. MnSOD contains a nutrient- and ionizing radiation (IR)-dependent reversible acetyl-lysine that is hyperacetylated in Sirt3⁻/⁻ livers at 3 months of age. Livers of Sirt3⁻/⁻ mice exhibit decreased MnSOD activity, but not immunoreactive protein, relative to wild-type livers. Reintroduction of wild-type but not deacetylation null Sirt3 into Sirt3⁻/⁻ MEFs deacetylated lysine and restored MnSOD activity. Site-directed mutagenesis of MnSOD lysine 122 to an arginine, mimicking deacetylation (lenti-MnSOD(K122-R)), increased MnSOD activity when expressed in MnSOD⁻/⁻ MEFs, suggesting acetylation directly regulates function. Furthermore, infection of Sirt3⁻/⁻ MEFs with lenti-MnSOD(K122-R) inhibited in vitro immortalization by an oncogene (Ras), inhibited IR-induced genomic instability, and decreased mitochondrial superoxide. Finally, IR was unable to induce MnSOD deacetylation or activity in Sirt3⁻/⁻ livers, and these irradiated livers displayed significant IR-induced cell damage and microvacuolization in their hepatocytes. |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Molecular Cell |
| Dergi ISSN | 1097-2765 |
| Dergi Tarandığı Indeksler | SCI |
| Makale Dili | İngilizce |
| Basım Tarihi | 12-2010 |
| Cilt No | 40 |
| Sayı | 6 |
| Sayfalar | 893 / 904 |
| Doi Numarası | 10.1016/j.molcel.2010.12.013 |
| Makale Linki | http://linkinghub.elsevier.com/retrieve/pii/S109727651000969X |
| Atıf Sayıları | |
| WoS | 726 |
