Small nucleolar RNA host gene 17 (non-protein coding) (SNHG17)

Small nucleolar RNA host gene 17 (SNHG17) is a long non-coding RNA (lncRNA) located on chromosome 20q11.23, with a length of 1,186 nucleotides. Unlike protein-coding genes, SNHG17 encodes no protein but functions primarily at the RNA level, regulating cellular activities through interactions with chromatin-modifying proteins, microRNAs, and other RNAs. SNHG17 is predominantly localized in both the nucleus and cytoplasm, and is highly expressed in a variety of human cancers, where it acts primarily as an oncogene. Its upregulation is associated with increased cell proliferation, inhibition of apoptosis, enhanced migration and invasion, and poor prognosis. Mechanistically, SNHG17 acts through several axes—including epigenetic gene silencing (via EZH2) and microRNA sponging (e.g., of miR-3180-3p and miR-3909)—to promote tumor growth and metastasis. Its expression is also implicated in processes underlying glucose metabolism, DNA repair, and non-cancerous diseases such as diabetes and nephropathy, although its principal current significance is as an oncogenic regulator and emerging therapeutic target in oncology.

Other names

SNHG17small nucleolar RNA host gene 17SNHG17 (lncRNA)small nuclear RNA host gene 17

Epigenetic silencing (e.g., interacts with EZH2 to repress tumor suppressor genes such as p57 and p15); Competing endogenous RNA (ceRNA) mechanism: sponges microRNAs (e.g., miR-3180-3p, miR-3909), releasing repression of oncogenic or pro-proliferative mRNAs such as RFX1; Modulation of DNA damage repair activity via interactions with NONO and the SNHG17-miR-3909-RING1/Rad51 axis.