Key result
The PAPdT purification method achieved over 99% purity and 42% efficiency for circular RNA, resulting in higher and longer-lasting protein expression in cells and mice compared to traditional methods.
Why the study?
Circular RNA is a promising therapeutic tool, but the development of scalable and efficient purification methods remains a critical challenge.
This is the authors' abstract. We don't add key points for this paper.
Circular RNA (circRNA) has garnered significant attention as a promising therapeutic tool due to its remarkable stability and resistance to exonuclease degradation. However, the development of scalable and efficient purification methods remains a critical challenge. In this study, we propose and evaluate a novel purification strategy for engineered circular RNA (PAPdt), which leverages poly(A) polymerase and oligo(dT) affinity chromatography. Using poly(A) polymerase, we add poly(A) tails of over 200 nucleotides to the 3’-OH ends of all linear RNA impurities in a circular RNA preparation. These linear RNAs are then separated from the circular RNA via oligo(dT) affinity chromatography. The linear impurities, bearing longer poly(A) tails, exhibit extended retention on the oligo(dT) column, whereas the circular RNA, with a shorter poly(A) sequence, elutes more quickly. By stepwise elution with ultrapure water, we effectively separate the circular RNA from the linear contaminants. This method offers a fundamental solution to the purification of circular RNA, combining high efficiency, purity, and cost-effectiveness.
A novel poly(A) polymerase and oligo(dT)-dependent purification method for circular RNA achieves high purity and efficiency, enhancing protein expression and reducing immunogenicity in preclinical models.
No takes yet. Share an insight, caveat, or question.
Wei et al. (2024) studied this question. PAPdT purification method (poly(A) polymerase and oligo(dT) affinity chromatography) vs. RNase R and HPLC-SEC purification methods was evaluated on Purity and yield of circular RNA. The PAPdT purification method achieved over 99% purity and 42% efficiency for circular RNA, resulting in higher and longer-lasting protein expression in cells and mice compared to traditional methods.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: