Abstract:
:In addition to its role in the treatment of pancreatitis, the serine protease inhibitor nafamostat exhibits a retinal protective effect. However, the exact mechanisms underlying this effect are unknown. In this study, the neuroprotective effects of nafamostat and its orally active derivative sepimostat against excitotoxicity were further characterised in vitro and in vivo. In primary rat cortical neurons, nafamostat completely suppressed N-methyl-D-aspartate (NMDA)-induced cell death. Intravitreal injection of nafamostat and sepimostat protected the rat retina against NMDA-induced degeneration, whereas the structurally related compounds, gabexate and camostat, did not. The neuroprotective effects of nafamostat and the NR2B antagonist ifenprodil were remarkably suppressed by spermidine, a naturally occurring polyamine that modulates the NR2B subunit. Both nafamostat and sepimostat inhibited [3H]ifenprodil binding to fractionated rat brain membranes. Thus, nafamostat and sepimostat may exert neuroprotective effects against excitotoxic retinal degeneration through NMDA receptor antagonism at the ifenprodil-binding site of the NR2B subunit.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Fuwa M,Kageyama M,Ohashi K,Sasaoka M,Sato R,Tanaka M,Tashiro Kdoi
10.1038/s41598-019-56905-xsubject
Has Abstractpub_date
2019-12-31 00:00:00pages
20409issue
1issn
2045-2322pii
10.1038/s41598-019-56905-xjournal_volume
9pub_type
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