Differential expression of CXCL8 in amyotrophic lateral sclerosis.

Abstract: Neurodegenerative diseases that affect the motor neurons, including amyotrophic lateral sclerosis (ALS), have little treatment options and are generally rapidly fatal (1, 2). We harnessed the power of unbiased, whole transcriptome differential gene expression analysis, utilizing primary patient cells and tissues to discover genes whose expression defines sporadic ALS using published data (3, 4). We found significant differential expression of CXCL8, encoding C-X-C motif chemokine ligand 8, in induced pluripotent stem cell (iPSC)-derived motor neurons of patients with ALS. CXCL8 was also differentially expressed in fibroblasts isolated from patients with ALS. CXCL8 transcript was present at significantly higher levels in ALS iPSC-derived motor neurons. These analyses will begin to define the transcriptional landscape of ALS.