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.

Disclosed are cationic polymers comprising monomers such as those described in Formula (I). Such polymers can be useful for the preparation of therapeutic compositions [e.g., compositions comprising nucleic acids such as m RNA). Additionally, therapeutic compositions comprising these cationic, biodegradable polymers can have improved properties and reduced toxicity. ##STR00001##

The present invention provides, among other things, multimeric coding nucleic acids that exhibit superior stability for in vivo and in vitro use. In some embodiments, a multimeric coding nucleic acid (MCNA) comprises two or more encoding polynucleotides linked via 3 ends such that the multimeric coding nucleic acid compound comprises two or more 5 ends.

The present invention provides, among other things, methods of treating ornithine transcarbamylase deficiency, including administering to a subject in need of treatment a composition comprising an mRNA encoding an ornithine transcarbamylase protein at a low dose and at an administration interval such that at least one symptom or feature of the OTC deficiency is reduced.

The present disclosure provides compositions and methods for the genetic modification of cells, including, but not limited to, hepatocytes. The compositions and methods can comprise lipid nanoparticles, wherein the lipid nanoparticles comprise at least one bioreducible ionizable cationic lipid, at least one structural lipid, at least one phospholipid and at least one PEGylated lipid.

This disclosure relates to mRNA therapy for the treatment of ornithine transcarbamylase deficiency (OTCD). mRNAs for use in the invention, when administered in vivo, encode human ornithine transcarbamylase (OTC). mRNA therapies of the disclosure increase and/or restore deficient levels of OTC expression and/or activity in subjects. mRNA therapies of the disclosure further decrease levels of toxic ammonia associated with deficient OTC activity in subjects.

Sequences of a serotype 8 adeno-associated virus and vectors and host cells containing these sequences are provided. Also described are methods of using such host cells and vectors in production of rAAV particles.

The present invention relates to a recombinant microorganism capable of producing putrescine, in which the microorganism is modified to have enhanced NCgl2522 activity, thereby producing putrescine in a high yield, and a method for producing putrescine using the microorganism.

Sequences of a serotype 8 adeno-associated virus and vectors and host cells containing these sequences are provided. Also described are methods of using such host cells and vectors in production of rAAV particles.

The present invention provides, among other things, multimeric coding nucleic acids that exhibit superior stability for in vivo and in vitro use. In some embodiments, a multimeric coding nucleic acid (MCNA) comprises two or more encoding polynucleotides linked via 3 ends such that the multimeric coding nucleic acid compound comprises two or more 5 ends.