Analysis of the Effect of Aggregated β-Amyloid on Cellular Signaling Pathways Critical for Memory in Alzheimer’s Disease
Poster Aug 10, 2017
Brad Larson, Arturo Gonzalez-Moya, Alexandra Wolff, Wini Luty
According to literature references, Extracellular-Signal Regulated Kinase (ERK) signaling has been linked to memory and regulated by environmental stimuli. In Alzheimer’s disease, progressive cognitive impairment is seen as a classic characteristic. These deficits are believed to be the result of progressive synaptic dysfunction initiated by aggregated β–amyloid peptide 1-42 (Aβ). Zhu et al. (2002) showed that Aβ induced disruption of kinases critical for memory. In late stages of Alzheimer’s disease, ERK activation is suppressed relative to early stages and controls (Webster et al. 2006). In vitro studies have also shown that under certain conditions Aβ or fragments inhibit ERK or the downstream cAMPresponse element-binding protein (CREB) in neuronal cell models (Daniels et al. 2001).
Here we evaluate the ability to detect changes in phosphorylation levels of ERK and CREB following treatment with Aβ using the SH-SY5Y neuroblastoma cell line. Aβ was oligomerized using a method previously described in the literature (FA et al. 2010). A two-step HTRFR assay process was incorporated such that cell plating and treatment are carried out in a 96-well clear-bottom imaging plate. Following lysis, aliquots were transferred to separate LV384-well assay plates to perform the phospho and total ERK and CREB assays. A neutralizing antibody was also tested for its capacity to counteract the inhibitory effects of Aβ. Aβ binding and antibody neutralization were detected via immunocytochemisty and microscopic analysis. All microplate reading and cellular imaging steps were performed using a novel cell imaging multi-mode reader. The combination provides an efficient, robust method for testing of new molecules to combat the degenerative effects of the disease.
Depression, Anxiety and Apathy in Young-Onset and Atypical Dementia: A systematic reviewPoster
This study aims to examine the body of empirical studies investigating the prevalence of depression, anxiety, and apathy in atypical and young-onset dementia.
Psychiatric Risk Gene Cacna1c and Early Life Stress: Potential Gene-Environment interactions?Poster
Early life stress (ELS) is highly associated with development of psychopathology
and mood disorders in adulthood. Genetic studies have identified variation in the gene calcium voltage-gated channel subunit alpha1C (CACNA1C) to increase risk for several psychiatric disorders. This poster assessed the expression of Cacna1c following prepubertal stress.
Regulatory T-Cells (Tregs) Within Bone Marrow-Derived Stem Cells (BMSCs) Actively Confer Immunomodulatory and Neuroprotective Effects Against StrokePoster
We found a distinct subpopulation of Tregs within BMSCs. Tregs and BMSCs in co-culture conferred neuroprotection that varied in a dose-dependent manner. Tregs minimized stem cell production of IL-6, a pro-inflammatory cytokine, and inhibited BMSC secretion of FGF-beta, a cytokine related to BMSC proliferation and differentiation. The ratio of Tregs found natively in BMSCs is optimally adapted to provide the maximum neuroprotective benefit of stem cell treatment after ischemic stroke.READ MORE
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27th International Conference on Nanomedicine and Nanomaterials
Oct 18 - Oct 19, 2018