HDAC6 and amyotrophic lateral sclerosis: Given that markers of the ubiquitin proteasome system (including ubiquitin and p62) have been shown to co-localize with DPR protein pathology in c9FTD/ALS patients (Mori et al., 2013a; Ash et al., 2013; Mori et al., 2013b; Gendron et al., 2013; Zu et al., 2013), and that HDAC6 has a high affinity for ubiquitin (Boyault et al., 2006), we evaluated whether HDAC6 co-localizes with DPR protein inclusions in c9FTD/ALS.