Abstract: The disclosure features novel lipids and compositions involving the same. Nanoparticle compositions include an ionizable lipid, a phospholipid, a first sterol or a tocopherol, and optionally a second sterol different from the first sterol. Nanoparticle compositions further including therapeutic and/or prophylactics such as RNA are useful in the delivery of therapeutic and/or prophylactics to mammalian cells or organs to, for example, regulate polypeptide, protein, or gene expression.

Abstract: The invention relates to mRNA therapy for the treatment of Fabry disease. mRNAs for use in the invention, when administered in vivo, encode human the ?-galactosidase A (GLA), isoforms thereof, functional fragments thereof, and fusion proteins comprising GLA. 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 GLA expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient GLA activity in subjects, namely Gb3 and lyso-Gb3.

Abstract: This disclosure relates to ionizable lipid-based lipid nanoparticles for delivery of mRNA encoding glucose-6-phosphatase. Lipid nanoparticle/mRNA therapies of the invention increase and/or restore deficient levels of glucose-6-phosphatase expression and activity in subjects and are useful for the treatment of glycogen storage disease type 1a (GSD-Ia). Lipid nanoparticle/mRNA therapies of the invention increase glucose production and reduce the abnormal accumulation of glycogen and glucose-6-phosphate associated with GSD-Ia.

Abstract: The invention relates to mRNA therapy for the treatment of Fabry disease. mRNAs for use in the invention, when administered in vivo, encode human the ?-galactosidase A (GLA), isoforms thereof, functional fragments thereof, and fusion proteins comprising GLA. 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 GLA expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient GLA activity in subjects, namely Gb3 and lyso-Gb3.

Abstract: The invention relates to mRNA therapy for the treatment of Acute Intermittent Porphyria (AIP). mRNAs for use in the invention, when administered in vivo, encode human porphobilinogen deaminase (PBGD), isoforms thereof, functional fragments thereof, and fusion proteins comprising PBGD. mRNAs of the invention are preferably encapsulated in lipid nanoparticles (LNPs) to affect efficient delivery to cells and/or tissues in subjects, when administered thereto. mRNA therapies of the invention increase and/or restore deficient levels of PBGD expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient PBGD activity in subjects, namely porphobilinogen and aminolevulinate (PBG and ALA).

Abstract: The disclosure features immune cell delivery lipid nanoparticle (LNP) compositions that allow for enhanced delivery of agents, e.g., nucleic acids, such as therapeutic and/or prophylactic RNAs, to immune cells, in particular T cells, as well as B cells, dendritic cells and monocytes. The LNPs comprise an effective amount of an immune cell delivery potentiating lipid such that delivery of an agent by an immune cell delivery LNP is enhanced as compared to an LNP lacking the immune cell delivery potentiating agent. Methods of using the immune cell delivery LNPs for delivery of agents, e.g., nucleic acid delivery, for protein expression, for modulating immune cell activity and modulating immune responses are also disclosed.

Abstract: The disclosure features target cell delivery lipid nanoparticle (LNP) compositions that allow for enhanced delivery of agents, e.g., nucleic acids, such as therapeutic and/or prophylactic RNAs, to target cells, in particular liver cells and/or splenic cells. The LNPs comprise an effective amount of a target cell delivery potentiating lipid such that delivery of an agent by a target cell target cell delivery LNP is enhanced as compared to an LNP lacking the target cell delivery potentiating agent. Methods of using the target cell target cell delivery LNPs for delivery of agents, e.g., nucleic acid delivery, for protein expression, and for modulating target cell activity are also disclosed.

Abstract: This disclosure provides improved lipid-based compositions, including lipid nanoparticle compositions, and methods of use thereof for delivering agents in vivo including nucleic acids and proteins. These compositions are not subject to accelerated blood clearance and they have an improved toxicity profile in vivo.

Abstract: This disclosure provides improved lipid-based compositions, including lipid nanoparticle compositions, and methods of use thereof for delivering agents in vivo including nucleic acids and proteins. These compositions are not subject to accelerated blood clearance and they have an improved toxicity profile in vivo.

Abstract: The invention relates to mRNA therapy for the treatment of Citrullinemia Type 2 (“CTLN2”). mRNAs for use in the invention, when administered in vivo, encode human Citrin, isoforms thereof, functional fragments thereof, and fusion proteins comprising Citrin. 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 Citrin expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of biomarkers associated with deficient Citrin activity in subjects, namely ammonia and/or triglycerides.

Abstract: The invention relates to mRNA therapy for the treatment of galactosemia type 1 (Gal-1). mRNAs for use in the invention, when administered in vivo, encode human galactose-1-phosphate uridylyltransferase (GALT), isoforms thereof, functional fragments thereof, and fusion proteins comprising GALT. 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 GALT expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient GALT activity in subjects, namely galactose-1-phosphate (Gal-1-P).

Abstract: The invention relates to mRNA therapy for the treatment of galactosemia type 1 (Gal-1). mRNAs for use in the invention, when administered in vivo, encode human galactose-1-phosphate uridylyltransferase (GALT), isoforms thereof, functional fragments thereof, and fusion proteins comprising GALT. 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 GALT expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient GALT activity in subjects, namely galactose-1-phosphate (Gal-1-P).

Abstract: The invention relates to mRNA therapy for the treatment of Citrullinemia Type 2 (“CTLN2”). mRNAs for use in the invention, when administered in vivo, encode human Citrin, isoforms thereof, functional fragments thereof, and fusion proteins comprising Citrin. 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 Citrin expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of biomarkers associated with deficient Citrin activity in subjects, namely ammonia and/or triglycerides.

Abstract: This disclosure provides improved lipid-based compositions, including lipid nanoparticle compositions, and methods of use thereof for delivering agents in vivo including nucleic acids and proteins. These compositions are not subject to accelerated blood clearance and they have an improved toxicity profile in vivo.

Abstract: The invention relates to mRNA therapy for the treatment of Fabry disease. mRNAs for use in the invention, when administered in vivo, encode human the ?-galactosidase A (GLA), isoforms thereof, functional fragments thereof, and fusion proteins comprising GLA. 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 GLA expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient GLA activity in subjects, namely Gb3 and lyso-Gb3.

Abstract: The disclosure features novel lipids and compositions involving the same. Nanoparticle compositions include an ionizable lipid, a phospholipid, a first sterol or a tocopherol, and optionally a second sterol different from the first sterol. Nanoparticle compositions further including therapeutic and/or prophylactics such as RNA are useful in the delivery of therapeutic and/or prophylactics to mammalian cells or organs to, for example, regulate polypeptide, protein, or gene expression.

Abstract: The invention relates to mRNA therapy for the treatment of Acute Intermittent Porphyria (AIP). mRNAs for use in the invention, when administered in vivo, encode human porphobilinogen deaminase (PBGD), isoforms thereof, functional fragments thereof, and fusion proteins comprising PBGD. mRNAs of the invention are preferably encapsulated in lipid nanoparticles (LNPs) to affect efficient delivery to cells and/or tissues in subjects, when administered thereto. mRNA therapies of the invention increase and/or restore deficient levels of PBGD expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient PBGD activity in subjects, namely porphobilinogen and aminolevulinate (PBG and ALA).

Abstract: This disclosure provides improved lipid-based compositions, including lipid nanoparticle compositions, and methods of use thereof for delivering agents in vivo including nucleic acids and proteins. These compositions are not subject to accelerated blood clearance and they have an improved toxicity profile in vivo.

Abstract: The invention relates to mRNA therapy for the treatment of Fabry disease. mRNAs for use in the invention, when administered in vivo, encode human the ?-galactosidase A (GLA), isoforms thereof, functional fragments thereof, and fusion proteins comprising GLA. 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 GLA expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient GLA activity in subjects, namely Gb3 and lyso-Gb3.

Abstract: The invention related to polyribonucleotides comprising an open reading frame of linked nucleosides encoding a polypeptide of interest (e.g., a therapeutic polypeptide), isoforms thereof, functional fragments thereof, and fusion proteins comprising the polypeptide. In some embodiments, the open reading frame is sequence-optimized. In particular embodiments, the invention provides sequence-optimized polyribonucleotides comprising nucleotides encoding the sequence of the polypeptide of interest, or sequence having high sequence identity with those sequence optimized polyribonucleotides.