microRNA 508 (miR-508)

microRNA 508 (miR-508) is a small, non-coding RNA molecule in humans, classified as a microRNA, and functions primarily in post-transcriptional regulation of gene expression[1][2][3][5]. It plays essential roles in epigenetic regulation by binding to target messenger RNAs (mRNAs), leading to their degradation or inhibition of translation. miR-508 exists in different mature forms (e.g., miR-508-3p, miR-508-5p), which have been implicated in various cellular and disease processes. For instance, miR-508 promotes aggressive phenotypes and PI3K/Akt pathway activation in esophageal squamous cell carcinoma (ESCC) by targeting and suppressing multiple phosphoinositide phosphatases such as PTEN, INPP5J, and INPP4A, thereby promoting tumor growth and correlating with poor prognosis[1][3]. Conversely, miR-508-5p can also act as a tumor suppressor, inhibiting cell proliferation, migration, and invasion in other cancers, such as endometrial cancer and melanoma, by targeting molecules like DLL3[2][5]. The exact role of miR-508 is context-dependent, and its expression levels and functions may vary by tissue type and disease state. It is not a receptor, enzyme, or transporter, but belongs to the microRNA family involved in post-transcriptional gene regulation and epigenetic modulation. There are currently no drugs in clinical use that specifically target miR-508, though it is being explored as a potential therapeutic target and biomarker in various cancers.

Other names

hsa-mir-508MIRN508MIR508miR-508-3pmiR-508-5p

microRNA mimic/inhibitor modulates gene expression by binding to target mRNA 3’ UTR, leading to mRNA degradation or translational repression