PTENP1 antisense RNA (PTENP1-AS)

PTENP1 antisense RNA (PTENP1-AS) is an **antisense long non-coding RNA** transcribed from the PTEN pseudogene locus. Unlike its sense counterpart (PTENP1-S), which acts as a microRNA sponge, PTENP1-AS functions predominantly as a transcriptional suppressor. It recruits chromatin-modifying proteins—including EZH2 and DNMT3A—to the PTEN promoter, causing **epigenetic silencing** via histone trimethylation and DNA methylation. This results in *decreased PTEN expression* and has been implicated in the **acquired resistance of melanoma to BRAF inhibitors** as well as in tumor progression and prognosis in several cancer types. Knockdown of PTENP1-AS restores PTEN expression and sensitizes resistant cancer cells to therapy in experimental settings[1][3]. PTENP1-AS has potential as both a **therapeutic target** and a **prognostic or diagnostic biomarker**, though no approved drugs currently target it; RNA-based interventions (siRNA, ASOs) are investigational. Broader roles include regulation of cell proliferation, apoptosis, and potentially other disease processes where PTEN signaling is critical.

Other names

PTENpg1-asRNAPTENP1asPTENpg1 antisense RNA

Downregulation of PTENP1-AS using siRNA or ASO increases PTEN expression epigenetically, by relieving chromatin suppression—potentially reversing acquired drug resistance in cancer cells[1] - Targeting PTENP1-AS affects the RNA-mediated chromatin modification pathway - Indirect modulation of the PI3K/AKT pathway (via effects on PTEN)