HOTAIRM1 and Huntington disease: In PD TDNs, as well as in PD NPCs, the increased transcription of many genes encoding lncRNAs was detected, while they were almost unexpressed in HD: HOXA-AS2, HOTAIRM1, AC004080.6, HOXA-AS3, HOXA10-AS lncRNA genes of HOXA cluster, HOXB-AS1, HOXB-AS3 genes of HOXB cluster, LINC02381 and FJL12825 genes of HOXC cluster, and HOXD-AS1 and HOXD-AS2 genes of HOXD cluster (Figure 4C and Figure S5B).