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Post-injury nerve regeneration of the peripheral nervous system declines with age, but the mechanisms underlying the weakened axonal regeneration are not well understood. Increased synthesis and activity of the AP-1 transcription factor c-Jun have been implicated in efficient motor axonal regeneration. In the present study, we evaluated the hypothesis that the impaired regenerative capacity in the...
The prevalence of depression increases with aging. We hypothesized that like humans, old animals exhibit anhedonic-like behavior, along with signs of behavioral despair. In rodents, anhedonia, a reduced sensitivity to reward, which is listed as a core feature of major depression in the DSM-IVR, can be measured by a decrease in intake of and preference for sweet solutions. Here, sucrose intake, forced...
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