| First Author | Ghoshal K | Year | 1999 |
| Journal | Biochem Biophys Res Commun | Volume | 264 |
| Issue | 3 | Pages | 735-42 |
| PubMed ID | 10544001 | Mgi Jnum | J:58394 |
| Mgi Id | MGI:1347440 | Doi | 10.1006/bbrc.1999.1563 |
| Citation | Ghoshal K, et al. (1999) Transcriptional induction of metallothionein-I and -II genes in the livers of Cu,Zn-superoxide dismutase knockout mice. Biochem Biophys Res Commun 264(3):735-42 |
| abstractText | The levels of metallothionein-I and -II (MT-I and MT-II) mRNAs were elevated (10- to 12-fold), specifically in the livers of mice with homozygous deletion of the gene for Cu,Zn-SOD (Sod1-/-), the enzyme that catalyzes the removal of O(-)(2). The induction of MT mRNA occurred primarily at the level of transcription. In vivo genomic footprinting of the MT-I promoter region revealed distinctive footprinting at MRE-d, MRE-c, and MLTF/ARE sites in the livers of knockout mice. MTF-1, the key factor responsible for the heavy-metal and oxidative stress-induced expression of the MT-I gene, was activated 3-fold in the nuclear extract from the livers of Cu,Zn-SOD null mice. Because metallothioneins are potent scavengers of reactive oxygen species and protect cells from oxidative stress, the apparent normal characteristics of the mice with the disrupted Cu, Zn-SOD gene are probably due to overexpression of MT-I and MT-II in the livers of these animals. Copyright 1999 Academic Press. |
