The present invention relates to methods and compositions for editing a MECP2 polynucleotide, e.g., a MECP2 polynucleotide comprising a SNP associated with Rett syndrome. The invention also relates to methods and compositions for treating or preventing Rett syndrome in a subject.

The present invention relates to methods and compositions for editing a TMC1 polynucleotide, e.g., a TMC1 polynucleotide comprising a SNP associated with autosomal recessive non-syndromic hearing loss. The invention also relates to methods and compositions for treating or preventing autosomal recessive non-syndromic hearing loss in a subject.

The present invention relates to methods and compositions for editing an RS1 polynucleotide, e.g., an RS1 polynucleotide comprising a SNP associated with X-linked retinoschisis (XLRS). The invention also relates to methods and compositions for treating or preventing XLRS in a subject.

The invention provides compositions and methods for reducing expression of a target gene in a cell, involving contacting a cell with an isolated double stranded nucleic acid (dsNA) in an amount effective to reduce expression of a target gene in a cell. The dsNAs of the invention possess a single stranded extension (in most embodiments, the single stranded extension comprises at least one modified nucleotide and/or phosphate back bone modification). Such single stranded extended Dicer-substrate siRNAs (DsiRNAs) were demonstrated to be effective RNA inhibitory agents compared to corresponding double stranded DsiRNAs.

The invention provides compositions and methods for reducing expression of a target gene in a cell, involving contacting a cell with an isolated double stranded nucleic acid (dsNA) in an amount effective to reduce expression of a target gene in a cell. The dsNAs of the invention possess a single stranded extension (in most embodiments, the single stranded extension comprises at least one modified nucleotide and/or phosphate back bone modification). Such single stranded extended Dicer-substrate siRNAs (DsiRNAs) were demonstrated to be effective RNA inhibitory agents compared to corresponding double stranded DsiRNAs.

Described are methods for treating diseases and disorders that can be mediated in part by a reduction in APOC3 gene expression in a human subject in need of treatment, using pharmaceutical compositions that include APOC3 RNAi agents. The disclosed pharmaceutical compositions that include APOC3 RNAi agents, when administered to a human subject in need thereof according to the methods disclosed herein, treat diseases and disorders associated with elevated triglyceride (TG) levels, such as familial chylomicronemia syndrome (FCS), hypertriglyceridemia, obesity, dyslipidemia, non-alcoholic steatohepatitis, non-alcoholic fatty liver disease, hyperlipidemia, abnormal lipid and/or cholesterol metabolism, atherosclerosis, cardiovascular disease, coronary artery disease, hypertriglyceridemia induced pancreatitis, metabolic syndrome, type II diabetes mellitus, chylomicronemia, multifactorial chylomicronemia, or lipodystrophy syndromes including familial partial lipodystrophy.

Described are methods for treating diseases and disorders that can be mediated in part by a reduction in APOC3 gene expression in a human subject in need of treatment, using pharmaceutical compositions that include APOC3 RNAi agents. The disclosed pharmaceutical compositions that include APOC3 RNAi agents, when administered to a human subject in need thereof according to the methods disclosed herein, treat diseases and disorders associated with elevated triglyceride (TG) levels, such as familial chylomicronemia syndrome (FCS), hypertriglyceridemia, obesity, dyslipidemia, non-alcoholic steatohepatitis, non-alcoholic fatty liver disease, hyperlipidemia, abnormal lipid and/or cholesterol metabolism, atherosclerosis, cardiovascular disease, coronary artery disease, hypertriglyceridemia induced pancreatitis, metabolic syndrome, type II diabetes mellitus, chylomicronemia, multifactorial chylomicronemia, or lipodystrophy syndromes including familial partial lipodystrophy.

The present invention relates to compounds, compositions, and methods for the study, diagnosis, and treatment of traits, diseases and conditions that respond to the modulation of PHD2 gene expression and/or activity, and/or modulate a beta-catenin gene expression pathway. Specifically, the invention relates to double-stranded nucleic acid molecules including small nucleic acid molecules, such as short interfering nucleic acid (siNA), short interfering RNA (siRNA), double-stranded RNA (dsRNA), micro-RNA (miRNA), and short hairpin RNA (shRNA) molecules that are capable of mediating or that mediate RNA interference (RNAi) against PHD2 gene expression.

The present invention relates to RNAi constructs for reducing expression of the ASGR1 gene. Methods of using such RNAi constructs to treat or prevent cardiovascular disease, such as coronary artery disease and myocardial infarction, and to reduce serum non-HDL cholesterol levels are also described.

The present invention relates to methods and compositions for editing an ASS1 polynucleotide, e.g., an ASS1 polynucleotide comprising a SNP associated with Citrullinemia Type 1. The invention also relates to methods and compositions for treating or preventing Citrullinemia Type 1 in a subject.