The present disclosure provides vectors comprising a transgene(s) encoding more than one isoform of Crumbs homologue-1 (CRB1) (e.g., CRB1-A and CRB1-B), and compositions thereof, for use in the treatment or prevention of CRB1-related diseases and disorder (e.g., autosomal recessive retinitis pigmentosa (RP) and Leber congenital amaurosis (LCA)).

Described herein are recombinant AAV vectors comprising a polynucleotide sequence comprising β-sarcoglycan and methods of using the recombinant vectors to reduce or prevent fibrosis in a mammalian subject suffering from a muscular dystrophy. Also described herein are combination therapies comprising administering AAV vector(s) expressing β-sarcoglycan and miR-29c to a mammalian subject suffering from a muscular dystrophy.

The present disclosure provides codon optimized nucleotide sequences encoding human REP1, vectors, and host cells comprising codon optimized REP1 sequences, and methods of treating retinal disorders such as choroideremia comprising administering to the subject a codon optimized sequence encoding human REP1.

The present disclosure provides polynucleotide cassettes, expression vectors and methods for the expression of a gene in mammalian cells to provide gene therapy for pyruvate kinase deficiency.

The present application, in some embodiments, is directed to a polynucleotide including: (a) a first nucleic acid molecule including a sequence of a human endogenous Bruton's tyrosine kinase (BTK) promoter; and (b) a second nucleic acid molecule including a codon optimized sequence encoding a BTK or a functional analog thereof. Further provided are an expression vector, a cell, and a composition, all of which include the polynucleotide of the invention, and a method of using same, such as for treating X-linked Agammaglobulinemia (XLA) in a subject in need thereof.

Described are DNA molecules which can be transcribed into an mRNA harbouring novel UTR sequences combining the advantages of being extremely short and at the same time allowing for high translation efficiencies of RNA molecules containing them. Further, described are vectors comprising such a DNA molecule and to host cells comprising such a vector. Moreover, described are corresponding RNA molecules containing such UTRs. Further, described in a pharmaceutical composition comprising the described RNA molecule are optionally a pharmaceutically acceptable carrier as well as to the use of the described UTRs for translating a coding region of an RNA molecule into a polypeptide or a protein encoded by said coding region.

Embodiments disclosed herein are directed to engineered CRISPR-Cas effector proteins that comprise at least one modification compared to an unmodified CRISPR-Cas effector protein that enhances binding of the of the CRISPR complex to the binding site and/or alters editing preference as compared to wild type. In certain example embodiments, the CRISPR-Cas effector protein is a Type V effector protein. In certain other example embodiments, the Type V effector protein is Cpf1. Embodiments disclosed herein are directed to viral vectors for delivery of CRISPR-Cas effector proteins, including Cpf1. In certain example embodiments, the vectors are designed so as to allow packaging of the CRISPR-Cas effector protein within a single vector. There is also an increased interest in the design of compact promoters for packing and thus expressing larger transgenes for targeted delivery and tissue-specificity. Thus, in another aspect certain embodiments disclosed herein are directed to delivery vectors, constructs, and methods of delivering larger genes for systemic delivery.

The present disclosure provides polynucleotide cassettes, expression vectors, and methods for the expression of a gene in mammalian cells.

The present disclosure provides codon optimized RPGRorf15 sequences, vectors, and host cells comprising codon optimized RPGRorf15 sequences, and methods of treating retinal disorders such as XLRP comprising administering to the subject a codon optimized RPGRorf15 sequence.

The present invention relates to a fusion protein comprising a Cas9 domain and a Spo11 domain, as well as the use of this protein to induce targeted meiotic recombinations in a eukaryotic cell.