This article is part of a Special Issue "Estradiol and Cognition". Estradiol participates in the regulation of the function and plasticity of synaptic circuits in key cognitive brain regions, such as the prefrontal cortex and the hippocampus. The mechanisms elicited by estradiol are mediated by the regulation of transcriptional activity by nuclear estrogen receptors and by intracellular signaling cascades activated by estrogen receptors associated with the plasma membrane. In addition, the mechanisms include the interaction of estradiol with the signaling of other factors involved in the regulation of cognition, such as brain derived neurotrophic factor, insulin-like growth factor-1 and Wnt. Modifications in these signaling pathways by aging or by a long-lasting ovarian hormone deprivation after menopause may impair the enhancing effects of estradiol on synaptic plasticity and cognition.
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http://dx.doi.org/10.1016/j.yhbeh.2015.04.016 | DOI Listing |
Background: Focused ultrasound (FUS)-induced blood-brain barrier opening (BBBO) is a technique for safely, non-invasively, and transiently opening the blood brain barrier in a targeted area of the brain. Pre-clinical and clinical studies have shown that FUS is capable of decreasing amyloid plaque load and stimulating neurogenesis in Alzheimer's Disease (AD) models, in addition to being safe for use in human patients. However, the effect of FUS-BBBO on neurons has not yet been characterized, despite its crucial role in cognition and regulating brain function.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Imperial College London, London, United Kingdom; Division of Neurology, Department of Brain Sciences, Imperial College London, United Kingdom, London, London, United Kingdom.
Background: Liraglutide is a glucagon-like peptide-1 (GLP-1) analogue licensed for the treatment of type 2 diabetes mellitus (T2DM). Preclinical evidence in transgenic models of Alzheimer's disease suggests that liraglutide exerts neuroprotective effects by reducing amyloid oligomers, normalising synaptic plasticity and cerebral glucose uptake, and increasing the proliferation of neuronal progenitor cells.
Method: This is a multi-centre, randomised, double-blind, placebo-controlled, phase IIb trial of liraglutide in participants with mild to moderate Alzheimer's dementia, conducted at several centres in the UK.
Alzheimers Dement
December 2024
Yonsei University, Incheon, Incheon, Korea, Republic of (South).
Background: Cyclin Y (CCNY) is a member of cyclin protein family inhibiting long-term synaptic plasticity, which is related to the learning and memory function in neuronal system. Recently, CCNY has been reported to associate with the cognitive deficits in Alzheimer's disease (AD).
Method: In this study, we discovered PFTAIRE peptide to diminish CCNY protein level and to ameliorate cognitive dysfunction in AD.
Background: To improve clinical translatability of non-clinical in-vivo Alzheimer's disease (AD) models, a humanized APP knock-in mouse model (APP) was recently created (Xia, D. et al., 2022).
View Article and Find Full Text PDFBackground: Alzheimer's disease is the most dreaded multifactorial neurological illness for which there is currently no known treatment. Although the exact cause of AD is still unknown, several factors related to lifestyle, genetics, and environment are known to have a significant role in the disease's development. Alzheimer's disease is characterized by neuronal loss, neurofibrillary tangles, and senile plaques.
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