One aspect of this study was to provide a bioinformatic analysis to assess whether the MNTF-derived peptide known as GM6 alters the expression of genes associated with Alzheimer's disease. Gene expression analyses are performed using several gene expression profiling datasets generated by DNA microarray or RNA-seq technology. Our results show Alzheimer's disease-associated genes exhibit unique responses to GM6 treatment, impacting signaling pathways linked to core processes that underlie Alzheimer's disease onset and progression. The expression of one or more genes or gene variants of particular interest described herein. We show that ALS patients treated with GM6 exhibit significantly decreased abundance of plasma tau post-treatment (FIG. 1D). We also show that GM6 repressed MAPT mRNA in SH-5YSY cells (FIG. 2).