Progress in Neurobiology 199 (2021) 101919
9
compensatory response to the increase in intracellular levels of Ang II
may explain the decrease in AT2, IGF-1 and SIRT1 expression observed
in the nigra of aged animals (
Diaz-Ruiz et al., 2015
;
Rodriguez-Perez
et al., 2016
;
Villar-Cheda et al., 2014
,
2012
), and the increase in cell
vulnerability to the increase in paracrine Ang II/AT1 levels that takes
place in aged animals.
As indicated above, different components of the intracellular RAS
may be deregulated under pathological conditions such as an excess of
cell oxidative stress or high glucose conditions (
Kumar et al., 2012b
;
Micakovic et al., 2018
;
Singh et al., 2008
;
Valenzuela et al., 2016
;
Vil-
lar-Cheda et al., 2017
).
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