Effects On Cytotoxic Edema
Purinergic receptors have been suggested to play a role in the treatment of cytotoxic edema and infarctions. It was found that with treatment of the purinergic ligand 2-methylthioladenosine 5' diphosphate (2-MeSADP), which is an agonist and has a high preference for the purinergic receptor type 1 isoform (P2Y1R), significantly contributes to the reduction of a ischemic lesions caused by cytotoxic edema. Further pharmacological evidence has suggested that 2MeSADP protection is controlled by enhanced astrocyte mitochondrial metabolism through increased inositol triphosphate-dependent calcium release. There is evidence suggesting a relationship between the levels of ATP and cytoxic edema, where low ATP levels are associated with an increased prevalence of cytotoxic edema. It is believed that mitochondria play an essential role in the metabolism of astrocyte energy within the penumbra of ischemic lesions. By enhancing the source of ATP provided by mitochondria, there could be a similar 'protective' effect for brain injuries in general.
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