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.
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
Internet-Based Biomarker Collection Feasibility: Experiences of a Tobacco Cessation Program for People Living with HIVPoster
This project introduces video-conferencing as a method for biomarker collection in research and will explain how biomarker collection via video-conferencing was implemented in a pilot ehealth intervention.READ MORE
Comparing The Anti-Alzheimer's Activity of Different Types of CoffeePoster
This study found that coffee solutions treated at 5% are toxic to neurons. However, the toxicity reduced significantly at 2.5%. While the toxicity was significantly less allowing for more cells to survive at 2.5%, the levels of toxic amyloid beta 1-42 significantly reduced. This reduction in amyloid beta is associated with improvement in cognitive performance, as the presence of these toxic peptides is one of the characteristics of AD pathophysiology.READ MORE