Betaxolol (SL 75212) is aβ1adrenergic receptorblocker withIC50of 6 μM. In vitro
Betaxolol is able to protect retinal neurones. Betaxolol attenuates the NMDA-induced influx of 45Ca2+ while β-adrenoreceptor agonists are ineffective. The glutamate-induced release of LDH is almost completely prevented when betaxolol (10 μM) is included. Betaxolol (100 μM) is very effective in preventing the hypoxia-induced release of LDH from cortical cultures.
In vivo
When Betaxolol is injected i.p. into the rats before ischaemia and on the days of reperfusion the changes to the calretinin and ChAT immunoreactivities are reduced and the reduction of the b-wave is prevented. Inclusion of betaxolol partially prevents the changes caused by NMDA and lack of oxygen/glucose. Cell Data