Consistent with these observations, treatment with the same insulin sensitising agents in experimental models attenuated learning and memory deficits [32], reduced the accumulation of Aβ, reduced Aβ42 levels and reduced levels of inflammatory markers [33].
Additionally, we found that knockdown of FoxO3a by siRNA silencing significantly improved neurobehavioral dysfunctions and conferred a better neuroprotective effects after TBI, evidenced by promoting motor behavioral recovery, attenuating learning and memory impairments, and partially reversing neuronal damage in the hippocampus.
Furthermore, since it has been recently reported that insulin-like growth factor 1 (IGF-1) attenuates spatial learning deficits in aged rats and promotes neurogenesis in the hippocampus, we assessed the impact of a chronic infusion of IGF-1 on age-related disorders.
That an inhibitor of BDNF processing, tPA-STOP, can attenuate new learning but potentiate extinction, further emphasises a central role for the integration of new and past experience at the molecular level in determining future behavioral responses.
However, -epicatechin, found as main phenolics in the non-anthocyanin fraction, seem to be the major contributors to in vitro neuronal cell protective effect against Aβ-induced oxidative stress, and they attenuate the learning and memory deficits through inhibition of AChE/ MDA formation in the present study.
Interestingly, CNQX micro-injection into the IC 2 hr after the taste consumption in 3 hr ITI-CTA learning also attenuated CTA memory.
In a rodent model of cognition using scopolamine induced cognition deficits in the Barnes maze, the extract attenuated scopolamine induced disruptions in learning at the higher dose of 100 mg/kg.
There was only a trend for attenuated verbal learning for the group passively listened to vocals.
Indeed, access to a running wheel significantly attenuates spatial learning and memory impairments in adult rats exposed to alcohol during development (Christie et al. 2005; Thomas et al. 2008).
In the present study, our results showed that atorvastatin could attenuate the Aβ-stimulated injury to learning and memory, and partly inhibit the inflammatory responses in the hippocampus of the rat brain.
