2 studies reported at therapy level; 2 evidence entries itemised.
RatTBIWeight-drop / impact-accelerationSprague-Dawley (specific pathogen free)n = 50 rats, n=10 per group across 5 groupsIntracerebroventricular stereotactic injection into the right lateral ventricle (anteroposterior minus 0.8 mm, mediolateral 1.6 mm, dorsoventral minus 4.0 mm from bregma)DAPT 0.03 mg per kg body weight (prepared at 1 microgram pe…Half an hour after injury
Model: Weight-drop craniocerebral injury under 1 percent pentobarbital 30 mg per kg intraperitoneally; a 5 mm diameter bone window drilled, dura exposed, and a 40 g hammer dropped vertically from 25 cm to produce moderate to severe traumatic brain injury; animals killed 24 hours after injury
DAPT significantly reduced apparent diffusion coefficient values and neurological severity scores and downregulated NICD, Hes1, Hes5 and NOX2 with reduced reactive oxygen species, although cerebral blood flow was unchanged.
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RatTBIWeight-drop / impact-accelerationSprague-DawleyMalen = n = 10 per group across six groups (control, mild, moderate…Stereotactic intracerebroventricular injection into the right lateral ventricle (coordinates -0.8 mm anteroposterior, 1.6 mm mediolateral, -4.0 mm dorsoventral from bregma)DAPT solution at 1 microgram per microlitre, dissolved in 0…30 minutes after injury
Model: Weight-drop craniocerebral injury through a 5 mm parietal bone window under 1% pentobarbital anaesthesia (30 mg/kg intraperitoneally); mild injury a 20 g hammer dropped 10 cm, moderate and severe injury a 40 g hammer dropped 15 cm or 25 cm respectively
Notch, Hes1 and Hes5 expression rose in proportion to injury severity. In severe injury, DAPT reduced Notch, Hes1 and Hes5 protein and mRNA, lowered the number of TUNEL-positive cells, decreased Bax, caspase-3 and caspase-9 and increased Bcl-2, reduced malondialdehyde and raised superoxide dismutas…
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