SNORD4A: SNORD4A is a small nucleolar RNA (snoRNA) that has been studied in various contexts [PMC9939161]. Risk models for different cohorts have been established using univariate and LASSO Cox regression analyses, and SNORD4A has been identified as one of the factors in the risk models [PMC9939161]. In exploratory analyses, SNORD4A showed lower mRNA levels in samples with crescents compared to those without [PMC6832959]. In a study using a 5xFAD mouse model, SNORD4A expression levels were significantly different in the brain cortex of 5xFAD mice compared to control mice [PMC9348914]. Additionally, significant hypomethylation of a CpG locus in the transcription start site (TSS) of SNORD4A was observed in a group with cerebral palsy compared to controls [PMC6539236]. SNORD4A is one of the non-coding RNAs (ncRNAs) expressed in various cell types, although its cell type specificity is still unknown [PMC7568261]. Furthermore, SNORD4A has been identified as one of the direct target genes of TP53 as a transcription factor gene [PMC6305651]. In another study, the abundance of SNORD4A did not vary between parent and KD cells regardless of changes in 2'-O-methylation levels [PMC8336889].