hsa-mir-645: hsa-mir-645 is a microRNA (miRNA) that has been identified as significantly downregulated in certain biological contexts [PMC7292968]. It is among the miRNAs that negatively regulate specific genes, suggesting a potential role in gene expression modulation [PMC9650865]. Despite being predicted as a "Moderate Target" for gene COL4A4, the consistency of this prediction with the change in stability (∆S) indicates a potential functional interaction [PMC9498445]. In studies related to COVID-19 and myocardial infarction (MI), hsa-mir-645 has been highlighted as one of the miRNAs that could regulate the post-transcriptional level of hub central obesity-related genes (CORGs), warranting further investigation [PMC10067640]. Additionally, hsa-mir-645 was found to be downregulated in certain studies, suggesting its involvement in disease-related expression profiles [PMC6942769], and was significantly associated with rs11089328 (DGCR8) under the dominant genotype, indicating its relevance to differential tissue expression [PMC4841949]. The miRNA was not profiled in some studies, which could imply its selective expression or relevance under specific conditions or disease states [PMC4519802]. The seed sequence of hsa-mir-645 has been identified within endo-siRNAs derived from RMRP, and its quantification is possible through established real-time PCR protocols [PMC3676784], although it was not detected across all cell types examined [PMC3676784].