Polypyrimidine tract-binding protein 1 mRNA (PTBP1 mRNA)

Polypyrimidine tract-binding protein 1 (PTBP1) mRNA encodes a multifunctional RNA-binding protein, also known as hnRNP I, which serves as a master regulator of alternative splicing, mRNA stability, and translation (UniProt P23246). In the central nervous system, PTBP1 is highly expressed in astrocytes and other non-neuronal cells, where it acts as a molecular gatekeeper to suppress the neuronal differentiation program (Fu et al., Nature 2020). Therapeutic targeting of PTBP1 mRNA using antisense oligonucleotides (ASOs) or RNA interference (RNAi) has been shown to induce the transdifferentiation of astrocytes into functional neurons, offering a potential regenerative strategy for neurodegenerative diseases such as Parkinson's and Alzheimer's (Zhou et al., Nature 2020). Additionally, PTBP1 is frequently upregulated in various malignancies, including glioblastoma and colorectal cancer, where it promotes the expression of pro-proliferative splice variants (PubMed: 29153491). Therapeutic interventions targeting this mRNA aim to either reprogram cell identity in the brain or arrest tumor progression by restoring homeostatic splicing patterns. However, the broad regulatory influence of PTBP1 across different tissues necessitates precise delivery systems to avoid systemic toxicity and unintended alterations in RNA processing (Maimon et al., Nature 2021).

Other names

PTB mRNAhnRNP I mRNAHNRNPI mRNAPolypyrimidine tract-binding protein mRNA

RNase H-mediated mRNA degradation or RNA interference (RNAi) to reduce PTBP1 protein levels, thereby modulating alternative splicing or inducing cellular reprogramming.