We are also interested in the effect of Sparcl1 fusion on known aggregation-prone proteins in the field of neurodegenerative diseases, such as amyloid β in Alzheimer’s disease, α-synuclein in Parkinson’s disease, huntingtin protein in Huntington’s disease, and SOD1 in amyotrophic lateral sclerosis. The gene discussed is HTT; the disease is neurodegenerative disease.