| 9237684 |
Genova ML, Bovina C, Marchetti M, Pallotti F, Tietz C, Biagini G, Pugnaloni A, Viticchi C, Gorini A, Villa RF, Lenaz G: Decrease of rotenone inhibition is a sensitive parameter of complex I damage in brain non-synaptic mitochondria of aged rats. Biochem Pharmacol. 2002 Apr 1;63(7):1259-72.
We investigated NADH oxidation in non-synaptic and synaptic mitochondria from brain cortex of 4- and 24-month-old rats. The NADH oxidase activity was significantly lower in non-synaptic mitochondria from aged rats; we also found a significant decrease of sensitivity of NADH oxidation to the specific Complex I inhibitor, rotenone. Since the rotenone-binding site encompasses Complex I subunits encoded by mtDNA, these results are in accordance with the mitochondrial theory of aging, whereby somatic mtDNA mutations are at the basis of cellular senescence. Accordingly, a 5 kb deletion was detected only in the cortex of the aged animals. |
193(2,3,3,3) |