mir-124 microRNA precursor family

The miR-124 microRNA precursor is a small non-coding RNA molecule that has been identified in flies (MI0000373),[1] nematode worms (MI0000302),[2] mouse (MI0000150) and human (MI0000443).[3] The mature ~21 nucleotide microRNAs are processed from hairpin precursor sequences by the Dicer enzyme, and in this case originates from the 3' arm. miR-124 has been found to be the most abundant microRNA expressed in neuronal cells. Experiments to alter expression of miR-124 in neural cells did not appear to affect differentiation.[4] However these results are controversial since other reports have described a role for miR-124 during neuronal differentiation.[5]

miR-124 microRNA precursor family
Predicted secondary structure and sequence conservation of mir-124
Identifiers
Symbolmir-124
RfamRF00239
miRBaseMI0000443
miRBase familyMIPF0000021
Other data
RNA typeGene; miRNA
Domain(s)Eukaryota
GO0035195 0035068
SO0001244
PDB structuresPDBe

Targets of miR-124
  • Visvanathan et al.. showed that miR-124 targets the mRNA of the anti-neural function protein SCP1 (small C-terminal domain phosphatase 1).[6]
  • Makeyev et al. showed that miR-124 directly targets PTBP1 (PTB/hnRNP I) mRNA, which encodes a global repressor of alternative pre-mRNA splicing in non-neuronal cells.[7]
  • Arrant et al. wrote that miR-124 changes glutamate receptor composition in the prefrontal cortex and can decrease social dysfunction in frontotemporal dementia.[8]

Clinical medicine

Presence of the G allele, compared to the C allele, in SNP rs531564 in pri-miR-124-1, measured by PCR-RFLP in leukocyte DNA, is linked to a reduced risk of gastric cancer (e.g. GG v CC OR 0.34 95% CI 0.19-0.59, p<0.001).[9]

References
  1. Lai, EC; Tomancak P; Williams RW; Rubin GM (2003). "Computational identification of Drosophila microRNA genes". Genome Biol. 4 (7): R42–. doi:10.1186/gb-2003-4-7-r42. PMC 193629. PMID 12844358.CS1 maint: extra punctuation (link)
  2. Lim, LP; Lau NC; Weinstein EG; Abdelhakim A; Yekta S; Rhoades MW; Burge CB; Bartel DP (2003). "The microRNAs of Caenorhabditis elegans". Genes Dev. 17 (8): 991–1008. doi:10.1101/gad.1074403. PMC 196042. PMID 12672692.
  3. Lagos-Quintana, M; Rauhut R; Yalcin A; Meyer J; Lendeckel W; Tuschl T (2002). "Identification of tissue-specific microRNAs from mouse". Curr Biol. 12 (9): 735–739. doi:10.1016/S0960-9822(02)00809-6. hdl:11858/00-001M-0000-0010-94EF-7. PMID 12007417.
  4. Cao X, Pfaff SL, Gage FH (2007). "A functional study of miR-124 in the developing neural tube". Genes Dev. 21 (5): 531–6. doi:10.1101/gad.1519207. PMC 1820895. PMID 17344415.
  5. Yoo AS, Staahl BT, Chen L, Crabtree GR (2009). "MicroRNA-mediated switching of chromatin-remodelling complexes in neural development". Nature. 460 (7255): 642–6. Bibcode:2009Natur.460..642Y. doi:10.1038/nature08139. PMC 2921580. PMID 19561591.
  6. Visvanathan J, Lee S, Lee B, Lee JW, Lee SK (2007). "The microRNA miR-124 antagonizes the anti-neural REST/SCP1 pathway during embryonic CNS development". Genes Dev. 21 (7): 744–9. doi:10.1101/gad.1519107. PMC 1838526. PMID 17403776.
  7. Makeyev EV, Zhang J, Carrasco MA, Maniatis T (August 2007). "The MicroRNA miR-124 Promotes Neuronal Differentiation by Triggering Brain-Specific Alternative Pre-mRNA Splicing". Mol. Cell. 27 (3): 435–48. doi:10.1016/j.molcel.2007.07.015. PMC 3139456. PMID 17679093.
  8. Roberson, Erik (4 December 2014). "MicroRNA-124 modulates social behavior in frontotemporal dementia". Nature Medicine. 20 (12): 1381–1383. doi:10.1038/nm.3768. PMID 25473917.
  9. Mirnoori SM, Shahangian SS, Salehi Z, Mashayekhi F, Sasani ST, Saedi HS (2018). "Influence of single nucleotide polymorphisms in pri-miR-124-1 and STAT3 genes on gastric cancer susceptibility". Br J Biomed Sci. 75 (4): 182–186. doi:10.1080/09674845.2018.1492206. PMID 29938592.


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