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.
Extracorporeal shockwave therapy accelerates motor axon regeneration despite a phenotypically mismatched environmentPoster
A femoral nerve defect model was adapted for the evaluation of proregenerative effects of extracorporeal shockwave therapy (ESWT). Functional evaluation, histology and qRT-PCR data show differences between sensory and motor-derived nerve transplants and a pro-regenerative effect of ESWT. These data provide evidence for the clinical application of ESWT after autologous nerve transplantation as a novel non-invasive method.READ MORE
Depressive Symptoms Related to Biological Markers of Immune Functioning among Young People with HIVPoster
Youth living with HIV (YLWH) are at risk for depression. This study aimed to identify trends in depressive symptoms for YLWH in a specialty-care clinic and follow up clinical treatment procedures.READ MORE