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COMPLEXI&AGING

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Modulation of mitochondrial complex I as a strategy to increase lifespan and pre...

Modulation of mitochondrial complex I as a strategy to increase lifespan and prevent age related diseases Nowadays, ageing is one of the main problems in Western society. The increase in the percentage of elderly people serves to strain the Social Security to the point of bankruptcy. The only way to alleviate the suffering caused by a... ver más

30/09/2016

UNEW

1M€

Presupuesto del proyecto: 1M€

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UNIVERSITY OF NEWCASTLE UPON TYNE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2016-09-30 No tenemos la información de la convocatoria

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UNEW

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Líder del proyecto

UNIVERSITY OF NEWCASTLE UPON TYNE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Nowadays, ageing is one of the main problems in Western society. The increase in the percentage of elderly people serves to strain the Social Security to the point of bankruptcy. The only way to alleviate the suffering caused by age-related degenerative disease is to fully understand the underlying forces which drive ageing and design strategies to delay it. Mitochondria are considered as central modulators of longevity in different species. It has been proposed that free radicals cause the accumulation of oxidative damage and as a result ageing. In accordance with this, production of Reactive Oxygen Species (ROS) by complex I negatively correlates with longevity. However, the overexpression of antioxidants or the reduction of ROS levels does not increase lifespan. These contradictory data can only be reconciled if complex I is modulating longevity through a ROS independent mechanism. We have expressed the alternative internal NADH dehydrogenase 1 (NDI1) from Saccharomyces cerevisiae in Drosophila melanogaster. The expression of NDI1 does not change the level of ROS but increases both the ratio of NAD+/NADH and Drosophila longevity. The main objective of this proposal is to study the mechanisms by which complex I regulates longevity. My general hypothesis is that complex I regulates longevity through a ROS independent mechanism. I propose that complex I controls the cellular levels of NAD+/NADH, keeping their levels at an equilibrium that favours the optimal functioning of the cell. When the ratio is moved towards NADH ageing is promoted, whereas when it is moved towards NAD+ pro-survival pathways are activated. I proposed two specific mechanisms downstream of complex I that promote cellular longevity or senescence: 1) activation of sirtuins, which would increase genome stability and 2) reduction of methylglyoxal generation, which would decrease the accumulation of cellular garbarge .

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