hsa-mir-126: Hsa-mir-126 is a microRNA that has been studied in the context of lung cancer. The primers used for quantitative PCR to detect hsa-mir-126 were provided as follows: forward primer 5′-ACAGTTCTCTCGTACCGTGAGTAAT-3′ and reverse primer 5′-AAAGGTTGATCTGCTCTCTCTCTC-3′ [PMC5529898]. These primers were used to amplify hsa-mir-126 in lung cancer tissue samples [PMC2764731]. The down-regulation of hsa-mir-126 was observed in the lung cancer tissue, suggesting a potential role for this microRNA in the development or progression of lung cancer [PMC2764731]. The reverse primer used for quantitative PCR was 5′-GGAACGTTCACGAATTTG-3′, and the forward primer was 5′-ATTGGAACGATACAGAGAGATT-3′ for human RNU6, which served as a control [PMC5529898]. These primers were used to detect and quantify hsa-mir-126 expression levels in lung cancer tissue samples. The down-regulation of hsa-mir-126 suggests that it may play a role as a tumor suppressor or have other regulatory functions in lung cancer development [PMC2764731]. Further research is needed to fully understand the mechanisms and implications of hsa-mir-126 dysregulation in lung cancer.