hsa-mir-4515: Hsa-mir-4515 is a microRNA that has been found to be down-regulated in various studies. In a study on renal epithelial progenitor (REP) patients, hsa-mir-4515 was one of the five differentially expressed miRNAs that were down-regulated [PMC8326912]. Similarly, in the plasma samples of acute Kawasaki disease (KD) patients, hsa-mir-4515 was significantly downregulated compared to healthy controls [PMC6667785]. Another study on acute KD patients also found hsa-mir-4515 to be significantly downregulated in plasma samples [PMC6611386]. In addition, hsa-mir-4515 was identified as one of the differentially expressed miRNAs between acute KD and normal controls [PMC8044791]. The role of hsa-mir-4515 in KD has not been extensively studied and reported in the literature so far [PMC8044791]. Overall, these studies suggest that hsa-mir-4515 is consistently downregulated in REP patients and acute KD patients compared to healthy controls. However, further research is needed to fully understand the role and significance of hsa-mir-4515 in these conditions.