Arcturus Therapeutics, Inc.

Disclosed herein is a compound of Formula I, wherein R 1 is a branched chain alkyl consisting of 10 to 31 carbons; R 2 is a linear alkyl, alkenyl, or alkynyl consisting of 2 to 20 carbons, or a branched chain alkyl consisting of 10 to 31 carbons; L 1 and L 2 are the same or different, each a linear alkane of 1 to 20 carbons or a linear alkene of 2 to 20 carbons; X 1 is S or O; R 3 is a linear or branched alkylene consisting of 1 to 6 carbons; and R 4 and R 5 are the same or different, each a hydrogen or a linear or branched alkyl consisting of 1 to 6 carbons; or a pharmaceutically acceptable salt or solvate thereof.

What is described is a compound of formula I consisting of a compound in which R 1 is a branched chain alkyl consisting of 10 to 31 carbons; R 2 is a linear alkyl, alkenyl, or alkynyl consisting of 2 to 20 carbons; L 1 and L 2 are the same or different, each a linear alkylene or alkenylene consisting of 2 to 20 carbons; X 1 is S or O; R 3 is a linear or branched alkylene consisting of 1 to 6 carbons; and R 4 and R 5 are the same or different, each a hydrogen or a linear or branched alkyl consisting of 1 to 6 carbons; or a pharmaceutically acceptable salt thereof.

The present disclosure provides a modified human OTC protein having improved properties for the treatment of OTC deficiency in a patient. Preferably, the protein of the disclosure is produced from a codon optimized mRNA suitable for administration to a patient suffering from OTC deficiency wherein upon administration of the mRNA to the patient, the protein of the disclosure is expressed in the patient in therapeutically effective amounts to treat OTC deficiency. The present disclosure also provides codon optimized mRNA sequences encoding wild type human OTC comprising a 5′ UTR derived from a gene expressed by Arabidopsis thaliana for use in treating OTC deficiency in a patient.

Provided herein are nucleic acid molecules encoding viral replication proteins and antigenic proteins or fragments thereof. Also provided herein are compositions that include nucleic acid molecules encoding viral replication and antigenic proteins, and lipids. Nucleic acid molecules provided herein are useful for inducing immune responses.

Disclosed herein are methods of purifying nucleic acids with reduced impurities. Some such methods include purifying transcribed RNA products, and may result in a reduction in dsRNA and other impurities compared to other methods.

A nucleic acid vaccine composition comprising one or more of a plasmid-based nucleic acid vaccine and immunotherapy, as well as a lipid formulation, is provided. In addition, the present invention provides a method of enhancing the potency of plasmid-based DNA vaccines and immunotherapies, by formulating a vaccine and/or immunotherapy in a lipid formulation, which is stable when refrigerated or stored frozen, is then delivered to a vaccinee by either needle/syringe, jet injection, or microneedles. The lipid formulation of the present invention comprises one or more lipid excipients selected from 1,2-Distearoyl-sn-glycero-3-phosphocholine, Cholest-5-en-3β-ol, 1,2-Dimyristoyl-rac-glycero-3-methylpolyoxyethlene, and or more symmetric ionizable cationic lipids. The present invention increases vaccine potency dramatically. It was unexpectedly discovered that the level of immunogen, or immune response molecules, produced in vivo is increased (versus administering merely the vaccine or immunotherapy) and, in the case of a vaccine immunogen, the immune response is enhanced.

What is described is a compound of formula I consisting of a compound in which R 1 is a branched chain alkyl consisting of 10 to 31 carbons; R 2 is a linear alkyl, alkenyl, or alkynyl consisting of 2 to 20 carbons; L 1 and L 2 are the same or different, each a linear alkylene or alkenylene consisting of 2 to 20 carbons; X 1 is S or O; R 3 is a linear or branched alkylene consisting of 1 to 6 carbons; and R 4 and R 5 are the same or different, each a hydrogen or a linear or branched alkyl consisting of 1 to 6 carbons; or a pharmaceutically acceptable salt thereof.

Disclosed herein are methods of producing transcribed RNA product with increased yield and reduced RNA degradation.

This invention provides expressible polynucleotides, which can express a target protein or polypeptide. Synthetic mRNA constructs for producing a protein or polypeptide can contain one or more 5′ UTRs, where a 5′ UTR may be expressed by a gene of a plant. In some embodiments, a 5′ UTR may be expressed by a gene of a member of Arabidopsis genus. The synthetic mRNA constructs can be used as pharmaceutical agents for expressing a target protein or polypeptide in vivo.

What is described is a compound of formula (1) wherein R 1 and R 2 are the same or different, each a linear or branched alkyl with 1-9 carbons, or an alkenyl or alkynyl with 2 to 11 carbon atoms; L 1 and L 2 are the same or different, each a linear alkyl having 5 to 18 carbon atoms, or form a heterocycle with N; X 1 is a bond, or is —CO—O— whereby L 2 -CO—O—R 2 is formed; X 2 is S or O; L 3 is a bond or a lower alkyl, or form a heterocycle with N; R 3 is a lower alkyl; and R 4 and R 5 are the same or different, each a lower alkyl; or a pharmaceutically acceptable salt thereof.