SRSF1 and amyotrophic lateral sclerosis: To test a potential neuroprotective effect of SRSF1 depletion in disease relevant cells, we next differentiated iNPCs into motor neurons (iMNs), transduced them with an adenoviral vector expressing RFP under the Hb9 promoter and cultured them either in monoculture or in co-culture with control or ALS-derived iAstrocytes.