Abstract: The present invention provides, among other things, method of treating an immune disease in a subject, the method comprising: administering to a subject in need thereof one or more mRNAs encoding a heavy chain and a light chain of an antibody that binds to a protein target selected from IL-4, IL-5, IL-6, IL-9, IL-13, IL-25, or IL-33, IL-4R, IL-5R, IL-6R, IL-9R, IL-13R, IL-25R or IL-33R, and wherein the one or more mRNAs are encapsulated in a lipid nanoparticle (LNP). The present invention also provides, among other things, a composition comprising one or more mRNAs encoding a heavy chain and a light chain of an antibody that binds a protein target selected from IL-4, IL-5, IL-6, IL-9, IL-13, IL-25, or IL-33, IL-4R, IL-5R, IL-6R, IL-9R, IL-13R, IL-25R or IL-33R, and wherein the one or more mRNAs are encapsulated in a lipid nanoparticle (LNP).

Abstract: The present invention provides, among other things, methods and compositions for treating primary ciliary dyskinesia (PCD) based on mRNA therapy. The compositions used in treatment of PCD comprise an mRNA comprising a dynein axonemal intermediate chain 1 (DNAI1) coding sequence and are administered at an effective dose and an administration interval such that at least one symptom or feature of PCD is reduced in intensity, severity, or frequency or has a delayed onset. mRNAs with optimized DNAI1 coding sequences are provided that can be administered without the need for modifying the nucleotides of the mRNA to achieve sustained in vivo function.

Abstract: The present invention provides, among other things, improved methods and pharmaceutical compositions for treating cystic fibrosis based on codon optimized mRNA encoding a wild-type Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) protein.

Abstract: The present invention provides, among other things, methods and compositions for treating methylmalonic academia (MMA) based on mRNA therapy. The compositions used in treatment of MMA comprise an mRNA comprising a methymalonyl-CoA mutase (MUT) coding sequence and are administered at an effective dose and an administration interval such that at least one symptom or feature of MMA is reduced in intensity, severity, or frequency or has a delayed onset. mRNAs with optimized MUT coding sequences are provided that can be administered without the need for modifying the nucleotides of the mRNA to achieve sustained in vivo function.

Abstract: The present invention provides, among other things, methods of treating Argininosuccinate Synthetase Deficiency (ASD), including administering to a subject in need of treatment a composition comprising an mRNA encoding argininosuccinate synthetase (ASS1) at an effective dose and an administration interval such that at least one symptom or feature of ASD is reduced in intensity, severity, or frequency or has delayed in onset.

Abstract: The present invention provides, among other things, improved pharmaceutical compositions comprising codon-optimized mRNA encoding a peptide or polypeptide encapsulated in a lipid nanoparticle comprising one or more of the cationic lipids that are particularly effective for pulmonary delivery.