Abstract: The present invention provides, among other things, methods of treating cystic fibrosis, comprising a step of administering to a subject in need of treatment a composition comprising an mRNA encoding a Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) protein, wherein the mRNA encoding the CFTR protein comprises a polynucleotide sequence at least 80% identical to SEQ ID NO: 1, wherein the mRNA is at a concentration of at least 0.4 mg/mL, and wherein the step of administering comprises inhalation.

Abstract: The present invention provides, among other things, methods of purifying messenger RNA (mRNA) including the steps of subjecting an impure preparation comprising in vitro synthesized rnRNA to a denaturing condition, and purifying the rnRNA from the impure preparation from step (a) by tangential flow filtration, wherein the mRNA purified from step (b) is substantially free of prematurely aborted RNA sequences and/or enzyme reagents used in in vitro synthesis.

Abstract: The present invention provides, among other things, methods of quantitating mRNA capping efficiency, particularly mRNA synthesized in vitro. In some embodiments, methods according to the present invention comprise providing an mRNA sample containing capped and uncapped mRNA, providing a cap specific binding substance under conditions that permit the formation of a complex between the cap specific binding substance and the capped mRNA, and quantitatively determining the amount of the complex as compared to a control, thereby quantifying mRNA capping efficiency.

Abstract: The present invention provides, among other things, methods of purifying messenger RNA (mRNA) including the steps of (a) precipitating mRNA from an impure preparation; (b) subjecting the impure preparation comprising precipitated mRNA to a purification process involving membrane filtration such that the precipitated mRNA is captured by a membrane; and (c) eluting the captured precipitated mRNA from the membrane by re-solubilizing the mRNA, thereby resulting in a purified mRNA solution. In some embodiments, a purification process involving membrane filtration suitable for the present invention is tangential flow filtration.

Abstract: The present invention provides, among other things, methods and compositions for delivering an antibody in vivo by administering to a subject in need thereof one or more mRNAs encoding a heavy chain and a light chain of an antibody, and wherein the antibody is expressed systemically in the subject. In some embodiments, the one or more mRNAs comprise a first mRNA encoding the heavy chain and a second mRNA encoding the light chain of the antibody.

Abstract: The present invention relates, in part, to methods for large-scale purification of mRNA. The method includes, at least, a step of centrifuging an mRNA suspension in a centrifuge comprising a porous substrate at a speed sufficient to remove process contaminants and to precipitate purified mRNA composition onto the porous substrate.

Abstract: The present invention provides, among other things, methods and compositions for selective degradation of proteins. In some aspects, messenger RNAs (mRNAs) are described that encode a ubiquitin pathway moiety and a binding peptide that binds a target protein, wherein the mRNA is encapsulated within a lipid nanoparticle. Also provided herein are mRNAs that encode at least two binding peptides, wherein a first binding peptide binds a ubiquitin pathway moiety and a second binding peptide binds a target protein, and wherein the mRNA is encapsulated within a lipid nanoparticle.

Abstract: The present invention relates, in part, to methods for large-scale purification of mRNA. The method includes, at least, steps of forming an mRNA slurry, stirring the slurry, and vacuum or pressure filtering the slurry.

Abstract: The present invention provides, among other things, methods and compositions for cancer treatment. The methods and compositions disclosed herein are particularly effective in reducing the size/volume of a tumor and inhibiting tumor growth.

Abstract: The present invention relates, in part, to methods for large-scale purification of mRNA. The method includes, at least, a step of centrifuging an mRNA suspension in a centrifuge comprising a porous substrate at a speed sufficient to remove process contaminants and to precipitate purified mRNA composition onto the porous substrate.

Abstract: The present invention provides, among other things, methods and compositions for delivering an antibody in vivo by administering to a subject in need thereof one or more mRNAs encoding a heavy chain and a light chain of an antibody, and wherein the antibody is expressed systemically in the subject. In some embodiments, the one or more mRNAs comprise a first mRNA encoding the heavy chain and a second mRNA encoding the light chain of the antibody.

Abstract: The present invention provides, among other things, methods of purifying messenger RNA (mRNA) including the steps of subjecting an impure preparation comprising in vitro synthesized mRNA to a denaturing condition, and purifying the mRNA from the impure preparation from step (a) by tangential flow filtration, wherein the mRNA purified from step (b) substantially free of prematurely aborted RNA sequences and/or enzyme reagents used in in vitro synthesis.

Abstract: The present invention relates, in part, to methods for large-scale purification of mRNA. The method includes, at least, steps of forming an mRNA slurry, stirring the slurry, and vacuum or pressure filtering the slurry.

Abstract: The present invention provides, among other things, methods of quantitating mRNA capping efficiency, particularly mRNA synthesized in vitro. In some embodiments, methods according to the present invention comprise providing an mRNA sample containing capped and uncapped mRNA, providing a cap specific binding substance under conditions that permit the formation of a complex between the cap specific binding substance and the capped mRNA, and quantitatively determining the amount of the complex as compared to a control, thereby quantifying mRNA capping efficiency.

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 heavy chain 5 (DNAH5) 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 DNAH5 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 and compositions for delivering an antibody in vivo by administering to a subject in need thereof one or more mRNAs encoding a heavy chain and a light chain of an antibody, and wherein the antibody is expressed systemically in the subject. In some embodiments, the one or more mRNAs comprise a first mRNA encoding the heavy chain and a second mRNA encoding the light chain of the antibody.

Abstract: The present invention provides, among other things, methods of quantitating mRNA capping efficiency, particularly mRNA synthesized in vitro. In some embodiments, methods according to the present invention comprise providing an mRNA sample containing capped and uncapped mRNA, providing a cap specific binding substance under conditions that permit the formation of a complex between the cap specific binding substance and the capped mRNA, and quantitatively determining the amount of the complex as compared to a control, thereby quantifying mRNA capping efficiency.

Abstract: The present invention provides, among other things, methods and compositions for delivering an antibody in vivo by administering to a subject in need thereof one or more mRNAs encoding a heavy chain and a light chain of an antibody, and wherein the antibody is expressed systemically in the subject. In some embodiments, the one or more mRNAs comprise a first mRNA encoding the heavy chain and a second mRNA encoding the light chain of the antibody.

Abstract: The present invention provides, among other things, methods of treating phenylketonuria (PKU), including administering to a subject in need of treatment a composition comprising an mRNA encoding phenylalanine hydroxylase (PAH) at an effective dose and an administration interval such that at least one symptom or feature of PKU is reduced in intensity, severity, or frequency or has delayed in onset. In some embodiments, the mRNA is encapsulated in a liposome comprising one or more cationic lipids, one or more non-cationic lipids, one or more cholesterol-based lipids and one or more PEG-modified lipids.

Abstract: The present invention provides, among other things, methods of purifying messenger RNA (mRNA) including the steps of (a) precipitating mRNA from an impure preparation; (b) subjecting the impure preparation comprising precipitated mRNA to a purification process involving membrane filtration such that the precipitated mRNA is captured by a membrane; and (c) eluting the captured precipitated mRNA from the membrane by re-solubilizing the mRNA, thereby resulting in a purified mRNA solution. In some embodiments, a purification process involving membrane filtration suitable for the present invention is tangential flow filtration.