https://link.springer.com/chapter/10.1007/978-981-10-5804-2_10
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Abstract
Mitochondrion
is the powerhouse of the cell, which is essential for cell survival
after cerebral ischemia/reperfusion. Mitochondrion is a sensitive
organelle susceptible to brain ischemia/reperfusion injury.
Mitochondrial dysfunction is one of the foremost events involved in
brain ischemia/reperfusion process and then induces further damage to
brain cells. It influences not only the fate of neural cells but also
blood-brain barrier permeability after ischemic stroke. The underlying
mechanism of mitochondria dysfunction in determining cell survival and
cell death involves in many cell signaling pathways including apoptosis,
autophagy, and mitochondrial biogenesis. Mitochondria apoptosis pathway
was extensively explored in the past. Many apoptosis-related regulator
families were involved in mitochondria apoptosis pathway, like Bcl-2
family, caspase family, p53 gene family, and so on. On the other hand,
ROS injury, Ca2+ overload, and mPTP opening are also
detrimental to mitochondrial function after cerebral
ischemia/reperfusion. Recent interests were focused on the important
role of mitophagy and mitochondrial biogenesis on cell survival after
cerebral ischemia/reperfusion, which are thought to be endogenous
protective mechanisms of mitochondrial dysfunction. Therefore, under
ischemia/reperfusion conditions, promoting endogenous protective
mechanisms and inhibiting exogenous damage mechanisms are both important
therapeutic strategies. In summary, mitochondrial dysfunction is not
simply the result of ischemia/reperfusion injury but also the cause of
cascading damage. So, protecting dysfunctional mitochondria is pivotal
to cell survival after ischemic stroke.
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