| First Author | Gohil K | Year | 2003 |
| Journal | Free Radic Biol Med | Volume | 35 |
| Issue | 11 | Pages | 1343-54 |
| PubMed ID | 14642382 | Mgi Jnum | J:132440 |
| Mgi Id | MGI:3775968 | Doi | 10.1016/s0891-5849(03)00509-4 |
| Citation | Gohil K, et al. (2003) Gene expression profile of oxidant stress and neurodegeneration in transgenic mice deficient in alpha-tocopherol transfer protein. Free Radic Biol Med 35(11):1343-54 |
| abstractText | Alpha-tocopherol transfer protein (TTP) regulates the retention and secretion of alpha-tocopherol (alpha-T) by the liver. Deletion of the TTP gene (Ttpa) in mice results in systemic deficiency of alpha-T and neurological dysfunctions described in patients with mutated Ttpa. We have explored genome-wide changes in mRNAs from brain cortex and liver of Ttpa-deficient (Ttpa(-/-)) mice and wild-type (Ttpa(+/+)) mice. Selective inductions of genes regulated by antioxidant response elements were detected in Ttpa(-/-) livers compared to Ttpa(+/+) livers, suggesting increased oxidant stress in Ttpa(-/-) livers. The activation of cell proliferation pathways in Ttpa(-/-) livers was indicated by the induction of genes that encode growth factor-binding proteins, mitogen-activated protein kinase kinase 3, and apoptosis inhibitor 6. The induction of synuclein-alpha and repression of synuclein-beta genes was detected in Ttpa(-/-) cortex. This may predispose Ttpa(-/-) cortex to increased formation of synuclein-alpha aggregates and Lewy body, often associated with oxidant stress. Cortex of Ttpa(-/-) mice revealed repression of genes encoding synaptic proteins, protein kinase C family members, and myelin proteins. A 13-fold decrease in the expression of retinoic acid receptor-related orphan receptor-alpha mRNA predicts staggerer-like phenotype (ataxia and deficits of motor coordination) of Ttpa(-/-) mice. The repression of specific genes that determine synaptic plasticity and neuronal development may account for suppressed electrophysiological activities of cortex and impaired behavior in Ttpa(-/-) mice. |
