Progranulin mRNA 3' untranslated region miR-29b recognition element (GRN 3'UTR miR-29b MRE)

The Progranulin (GRN) mRNA 3' untranslated region (UTR) miR-29b recognition element is a conserved regulatory sequence located within the 3'UTR of the human GRN gene. This element is specifically recognized and bound by microRNA-29b (miR-29b), which acts as a negative regulator of progranulin expression by inducing translational repression and mRNA degradation (Jiao et al., 2010). In patients with frontotemporal dementia (FTD) caused by heterozygous GRN mutations, progranulin levels are reduced by approximately 50%, a condition known as haploinsufficiency. Targeting this recognition element with antisense oligonucleotides (ASOs) or target-site blockers (TSBs) provides a therapeutic strategy to increase progranulin production from the remaining healthy allele by sterically hindering miR-29b binding (Aggarwal et al., 2023). This mechanism effectively "derepresses" the mRNA, leading to enhanced translation and higher levels of secreted progranulin protein. Such interventions are currently being explored to treat FTD and other neurodegenerative conditions associated with progranulin deficiency.

Other names

GRN 3'UTR miR-29b binding siteProgranulin mRNA 3'UTR microRNA-29b target sequencemiR-29b MRE in GRNhPGRN 3'UTR miR-29b site

Steric blocking of microRNA binding to the mRNA 3'UTR to prevent translational repression and mRNA degradation, thereby increasing target protein levels.