completion of splicing; however, these ncRNA genes embedded in intron regions are produced upon intron removal [246]. Furthermore, they can survive even longer than the intronic host genes [2]. Considering that the ncRNAs located in introns are co-expressed and co-regulated with their host genes by the promoters and splicing machineries of host genes, they are considered to be involved in auto-regulation of the expression of host genes [46].
