apaptosis
Picture Blog: mRNA Reprogramming for Human iPSCs without B18R!
Human induced pluripotent stem cells provide a great route towards personalized medicine and high accuracy drug screening. Allele Biotech has developed the most efficient method of making human iPSCs by using enhanced mRNAs, which have been adopted by leading pharmaceutical companies for clinical trials. The effects from medium-supplementing mRNAs are robust yet transient, and highly specific compared to both miRNAs (off-targets) and small molecules (unknown targets). To repress cellular immune response to introduced RNA molecules, viral protein B18R was previously used during mRNA reprogramming.
B18R is relatively expensive and inconvenient to use because it requires pre-aliquoting and -80C storage. The protocol has recently been dramatically improved at Allele through an NIDA-funded project. In our latest reprogramming run, all we needed to do was to include mRNA complex in the supplement during medium change for just a week without the need of adding any other type of molecules (such as B18R, miRNA, or chemicals) to help the mRNA mix, unlike all other known mRNA-reprogramming protocols. This advancement can make reprogramming human fibroblasts to footprint-free and xeno-free iPSCs a routine experiment for any lab to perform.
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