US Patent 12128113 Polynucleotides encoding JAGGED1 for the treatment of Alagille syndrome

The invention relates to mRNA therapy for the treatment of Alagille syndrome (ALGS), mRNAs for use in the invention, when administered in vivo, encode JAGGED 1 (JAG1), isoforms thereof functional fragments thereof, and fusion proteins comprising JAG1, mRNAs of the invention are preferably encapsulated in lipid nanoparticles (LNPs) to effect efficient delivery to cells and/or tissues in subjects, when administered thereto. mRNA therapies of the invention increase and/or restore deficient levels of JAG1 expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient JAG1 activity in subjects.