Establishment of SPAST mutant induced pluripotent stem cells (iPSCs) from a hereditary spastic paraplegia (HSP) patient

Human skin fibroblasts were isolated from a 40-year-old hereditary spastic paraplegia patient carrying an intronic splice site mutation (c.1687 + 2 T > A) in SPAST, leading to hereditary spastic paraplegia type 4 (SPG4). Fibroblasts were reprogrammed using episomal plasmids carrying hOCT4, hSOX2, hKLF4, hL-MYC and hLIN28. The generated transgene-free line iPS-SPG4-splice retained the specific mutation with no additional genomic aberrations, expressed pluripotency markers and was able to differentiate into cells of all germ layers in vitro. The generated iPS-SPG4-splice line might be a useful platform to study the pathomechanism of SPG4.