Neurofibromin 1 pre-messenger RNA splice-regulatory sequence (NF1 pre-mRNA)

The Neurofibromin 1 (NF1) pre-mRNA splice-regulatory sequence refers to the cis-acting elements within the NF1 primary transcript that coordinate the assembly of the spliceosome to produce mature mRNA. The NF1 gene encodes neurofibromin, a large protein that acts as a negative regulator of the RAS/MAPK signaling pathway by accelerating the hydrolysis of RAS-GTP (Messiaen et al., 2000; PubMed PMID: 10903931). Mutations affecting these splice-regulatory sequences—including those at canonical splice sites, exonic splicing enhancers (ESEs), or deep intronic regions that create cryptic splice sites—account for approximately 30-50% of all Neurofibromatosis type 1 cases (Wimmer et al., 2007; PubMed PMID: 17311295). These splicing defects typically lead to the production of truncated, non-functional neurofibromin, resulting in the clinical hallmarks of NF1 such as café-au-lait spots, neurofibromas, and an increased risk of malignant peripheral nerve sheath tumors (Pros et al., 2009; PubMed PMID: 19105186). Therapeutic strategies targeting these sequences involve the use of antisense oligonucleotides (ASOs) or splice-switching oligonucleotides (SSOs) designed to bind and mask specific regulatory motifs. By sterically blocking aberrant splice sites or enhancing the recognition of weak exons, these agents aim to restore the correct reading frame and increase the expression of functional neurofibromin protein (Castellanos et al., 2013; PubMed PMID: 23430918).

Other names

NF1 splicing elementNF1 pre-mRNA regulatory sequenceNeurofibromin 1 mRNA precursorNF1 splice site

Splice modulation via steric hindrance of regulatory elements to restore correct mRNA processing.