Our goal here is to determine whether changes in the formation or processing of oxidative DNA damage are associated with neurodegeneration. It is our hypothesis that DNA repair systems play critical roles in responding to multiple types of acute and chronic cellular stress. We have identified a DNA damage response cascade leading from PARP1 to defected mitophagy. In the rare autosomal recessive disease Ataxia Telangiectasia (AT,) we documented increased PARylation, low NAD+ and mitochondrial dysfunction across multiple species. Importantly, treatment with NAD+ precursors that restored NAD levels reduced the severity of AT neuropathology, improved neuromuscular function, delayed memory loss and dramatically extended lifespan. Mechanistically, we ascribed the benefits to improvements in DNA repair and mitophagy. This work underscores the important linkage between DNA repair and mitochondrial function and further points to novel therapeutic interventions.
| Hou, Yujun; Lautrup, Sofie; Cordonnier, Stephanie et al. (2018) NAD+ supplementation normalizes key Alzheimer's features and DNA damage responses in a new AD mouse model with introduced DNA repair deficiency. Proc Natl Acad Sci U S A 115:E1876-E1885 |
| Baptiste, Beverly A; Katchur, Steven R; Fivenson, Elayne M et al. (2018) Enhanced mitochondrial DNA repair of the common disease-associated variant, Ser326Cys, of hOGG1 through small molecule intervention. Free Radic Biol Med 124:149-162 |
| Fang, Evandro F; Lautrup, Sofie; Hou, Yujun et al. (2017) NAD+ in Aging: Molecular Mechanisms and Translational Implications. Trends Mol Med 23:899-916 |
| Fang, Evandro F; Bohr, Vilhelm A (2017) NAD(+): The convergence of DNA repair and mitophagy. Autophagy 13:442-443 |
| Croteau, Deborah L; Fang, Evandro Fei; Nilsen, Hilde et al. (2017) NAD(+) in DNA repair and mitochondrial maintenance. Cell Cycle 16:491-492 |
| Misiak, Magdalena; Vergara Greeno, Rebeca; Baptiste, Beverly A et al. (2017) DNA polymerase ? decrement triggers death of olfactory bulb cells and impairs olfaction in a mouse model of Alzheimer's disease. Aging Cell 16:162-172 |
| Hou, Yujun; Song, Hyundong; Croteau, Deborah L et al. (2017) Genome instability in Alzheimer disease. Mech Ageing Dev 161:83-94 |
| Karikkineth, Ajoy C; Scheibye-Knudsen, Morten; Fivenson, Elayne et al. (2017) Cockayne syndrome: Clinical features, model systems and pathways. Ageing Res Rev 33:3-17 |
| Hegde, Muralidhar L; Bohr, Vilhelm A; Mitra, Sankar (2017) DNA damage responses in central nervous system and age-associated neurodegeneration. Mech Ageing Dev 161:1-3 |
| Fivenson, Elayne M; Lautrup, Sofie; Sun, Nuo et al. (2017) Mitophagy in neurodegeneration and aging. Neurochem Int 109:202-209 |
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