MicroRNA 429 (miR-429)

MicroRNA 429 (miR-429) is a 21–22 nucleotide non-coding RNA, encoded by the MIR429 gene, located on human chromosome 1 and is a member of the miR-200 family[1][5]. miR-429 regulates gene expression by binding complementary sequences in the 3′ untranslated regions of target mRNAs, leading to translation inhibition or mRNA degradation. It plays a pivotal role in several physiological and pathological processes, particularly in epithelial-mesenchymal transition (EMT), cell motility, invasion, apoptosis, proliferation, and inflammation. In cancer, miR-429 usually acts as a tumor suppressor by inhibiting metastasis and invasion through direct targeting of genes such as ZEB1, ZEB2, CRKL, Bcl-2, and others implicated in EMT and cell survival[3][4][5]. Furthermore, miR-429 is involved in the negative regulation of the inflammatory signaling pathway by suppressing IKKβ and subsequently NF-κB activity, which reduces interleukin-8 (IL-8) secretion and may be relevant for oral inflammatory diseases[2]. Its expression pattern and biological roles make miR-429 a promising biomarker for cancer diagnosis, prognosis, and a potential therapeutic target, though challenges remain for clinical translation due to tissue-specific effects and off-target risks[2][4][5].

Other names

miR-429MIR429hsa-miR-429MIRN429mir-429

Synthetic mimics: Restoration of miR-429 levels to suppress oncogenic pathways, impede EMT, inhibit migration/invasion, and reduce inflammatory mediators. Synthetic inhibitors: Downregulation of miR-429 (less common mechanism, potentially to study function or in cases of tumor suppressor paradox)