Mir-100-let-7a-2-mir-125b-1 cluster host gene (MIR100HG)

Mir-100-let-7a-2-mir-125b-1 cluster host gene (MIR100HG) is a long non-coding RNA (lncRNA) located on chromosome 11q24.1 and functions as a host gene for multiple microRNAs, including miR-100, let-7a-2, and miR-125b-1, though transcript variants may differ in which microRNAs are included in the locus[1][3]. MIR100HG plays significant regulatory roles in both neural and cancer biology: - In cancer, especially triple-negative breast cancer (TNBC), MIR100HG is overexpressed and promotes cancer cell proliferation, migration, and invasion by regulating genes critical for cell cycle progression such as p27 (CDKN1B), p21, and cyclin D1, using mechanisms that include the formation of RNA–DNA triplex structures and acting as a ceRNA (competing endogenous RNA)[1][3]. - MIR100HG regulates the stability and expression of cell cycle inhibitors (p21, p27) and promotes the G1/S cell cycle transition, favoring cell proliferation and tumorigenesis[1][3]. - In neural tissues, particularly during differentiation, specific transcript isoforms such as linc-NeD125 play key roles in neuronal maturation and function by acting as a miRNA precursor (producing miR-125b-1) and as a ceRNA to control the availability of miRNAs regulating neural proliferation and differentiation genes[2][4]. - Mechanistically, MIR100HG acts at transcriptional and post-transcriptional levels by: (1) promoting RNA-binding protein–mRNA interactions, (2) serving as a scaffold for nucleic acid-protein complexes, (3) sponging microRNAs as a ceRNA, and (4) providing precursor sequences for certain miRNAs[1][2]. MIR100HG is a promising cancer biomarker for prognosis and potentially a molecular target for precision RNA therapeutics in oncology[1][3]. Targeting it directly with small molecules is not currently feasible; rather, nucleic acid-based strategies (such as antisense oligonucleotides) may have therapeutic value in malignancies marked by MIR100HG overexpression.

Other names

MIR100HGAGD1lncRNA-N2linc-NeD125adipogenesis down-regulated transcript 1lncRNA neuronal 2mir-100-let-7a-2 cluster host gene (non-protein coding)neuronal differentiation lncRNA hosting miR-125

Not applicable for classical small-molecule drugs; for RNA-based therapeutics or experimental approaches, inhibition of MIR100HG could suppress oncogenic cell proliferation or modulate gene expression networks by disrupting triplex formation, ceRNA sponging, or miRNA processing[1][2][3].