SNORD23: SNORD23 is a snoRNA (small nucleolar RNA) that has been found to interact with U6 snRNA and is predicted to modify position 64 of U6 snRNA [PMC5389715]. It has been identified as a chimeric read with U6 snRNA [PMC5389715]. SNORD23, along with SNORA31, SNORA28, and SNORA73, has been confirmed to be significantly increased in young versus old serum [PMC5333149]. Changes in snoRNA abundance, including SNORD23, have been implicated in joint aging and osteoarthritis (OA), suggesting their potential use as biomarkers for these conditions [PMC5333149]. SNORD23 has also been identified as one of the central ncRNAs in a network topology analysis [PMC4391585]. It is one of the ncRNAs that appear in two lists of ncRNAs with high centrality [PMC4391585]. In cell differentiation, the expression of canonical snoRNAs such as SNORD23 predicts regulation of rRNA post-transcriptional modification [PMC8881200]. In different exosome populations, including A33-Exos and Ep-CAM-Exos, SNORD23 has shown differential expression levels [PMC7461500]. Additionally, it is expressed in PBMCs along with other snoRNAs such as SCARNA6 [PMC8092379]. A group of snoRNAs including SNORD23 gives rise to over 90% of the processed fragments observed [PMC4914119].