PR domain zinc finger protein 2 mRNA (PRDM2 mRNA) (PRDM2 mRNA)

PR domain zinc finger protein 2 (PRDM2) mRNA is the transcript of the PRDM2 gene, which encodes the RIZ (Retinoblastoma protein-interacting zinc finger) protein family [NCBI Gene: 7799]. This target is characterized by its production of two distinct isoforms through alternative splicing and internal promoter usage: RIZ1, which contains a catalytic PR domain with histone methyltransferase activity, and RIZ2, which lacks this domain [UniProt: Q13029]. RIZ1 functions as a tumor suppressor by methylating histone H3 at lysine 9 (H3K9), thereby regulating genes involved in the cell cycle and apoptosis [Sun et al., 2008]. In many human malignancies, the RIZ1-encoding mRNA is downregulated or silenced via promoter hypermethylation, while RIZ2 mRNA levels are maintained or elevated, creating a pro-oncogenic imbalance [Kim et al., 2013]. Therapeutic interest in PRDM2 mRNA focuses on restoring RIZ1 expression or using RNA-based modalities, such as antisense oligonucleotides (ASOs), to specifically target and reduce RIZ2 or shift splicing toward RIZ1 [Pastural et al., 2007]. As a target, it is particularly relevant in the context of epigenetic therapy for solid tumors and hematological cancers where PRDM2 dysregulation is a known driver. Beyond oncology, PRDM2 has been implicated in metabolic disorders, where its role in brown adipose tissue differentiation makes its mRNA a potential target for obesity research [UniProt: Q13029].

Other names

RIZ1RIZ2Retinoblastoma protein-interacting zinc finger protein 1KMT8MDS1-EVI1-like gene 1MTB-ZFHUMHOVERGATA-3-binding protein GBP

Epigenetic reactivation of the tumor-suppressive RIZ1 isoform through DNA demethylation of the PRDM2 promoter or targeted modulation of mRNA splicing to favor RIZ1 over the oncogenic RIZ2 isoform.