WHY IS THERE AGE-RELATED BRAIN Aβ ACCUMULATION

5 important questions on WHY IS THERE AGE-RELATED BRAIN Aβ ACCUMULATION

Name the two mechanisms by which extracellular Amyloid beta can be eliminated

  1. degradation by IDE and/or NEP
  2. transport by RAGE and/or P-glycoprotein

What may be a mechanism by which amyloid beta can accumulate in the elderly?

Alterations in the cleavage of APP, alpha secretase may start to dysfunction.

APP cleavage is carefully balanced, what may happen in the elderly with the expression and function of a secretase and BACE1?

a secretase may dysfunction as a result of acetylation, whereas BACE1 expression is increased.
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What may be an underlying cause of increased BACE1 expression in the ederly?

Oxidative stress-induced HIF1a (Guglielmotto et al 2009)

How may exercise influence APP metabolism?

reduced extracellular amyloid beta by increasing brain peptidases and stimulating synaptic processes.

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