The present invention relates to a conjugate for delivery of biomolecules using a cationic macromolecule as a linker between the biomolecule and biomarker targeting moiety, and the process of making the conjugate.

Genomic safe harbors (GSH) for genetic therapies in human stem cells and engineered nanoparticles to provide targeted genetic therapies are described. The GSH and/or associated nanoparticles can be used to safely and efficiently treat a variety of genetic, infectious, and malignant diseases.

Methods of modulating expression of a target nucleic acid in a cell are provided including introducing into the cell a first foreign nucleic acid encoding one or more RNAs complementary to DNA, wherein the DNA includes the target nucleic acid, introducing into the cell a second foreign nucleic acid encoding a nuclease-null Cas9 protein that binds to the DNA and is guided by the one or more RNAs, introducing into the cell a third foreign nucleic acid encoding a transcriptional regulator protein or domain, wherein the one or more RNAs, the nuclease-null Cas9 protein, and the transcriptional regulator protein or domain are expressed, wherein the one or more RNAs, the nuclease-null Cas9 protein and the transcriptional regulator protein or domain co-localize to the DNA and wherein the transcriptional regulator protein or domain regulates expression of the target nucleic acid.

The present disclosure provides for antibody-oligonucleotide conjugates, methods of preparation thereof, and methods of use thereof. Also provided are related compounds, compositions and kits.

The disclosure is directed to conjugates, e.g. PNA conjugates, as well as methods of employing the conjugates for detecting one or more targets in a biological sample, e.g. a tissue sample.

Synthetic αvβ6 integrin ligands of Formula I having serum stability and affinity for integrin αvβ6, which is a receptor expressed in a variety of cell types, are described. The described ligands are useful for delivering cargo molecules, such as RNAi agents or other oligonucleotide-based compounds, to cells that express integrin αvβ6, and thereby facilitating the uptake of the cargo molecules into these cells. Compositions that include αvβ6 integrin ligands and methods of use are also described. ##STR00001##

Aspects of the disclosure relate to complexes comprising a muscle-targeting agent covalently linked to a molecular payload. In some embodiments, the muscle-targeting agent specifically binds to an internalizing cell surface receptor on muscle cells. In some embodiments, the molecular payload promotes the expression or activity of a functional dystrophin protein. In some embodiments, the molecular payload is an oligonucleotide, such as an antisense oligonucleotide, e.g., an oligonucleotide that causes exon skipping in a mRNA expressed from a mutant DMD allele.

Isolation or in vitro assembly of the Cas9-crRNA complex of the Streptococcus thermophilus CRISPR3/Cas system and use for cleavage of DNA bearing a nucleotide sequence complementary to the crRNA and a proto-spacer adjacent motif. Methods for site-specific modification of a target DNA molecule using an RNA-guided DNA endonuclease comprising at least one RNA sequence and at least one of an RuvC active site motif and an HNH active site motif; for conversion of Cas9 polypeptide into a nickase cleaving one strand of double-stranded DNA by inactivating one of the active sites (RuvC or HNH) in the polypeptide by at least one point mutation; for assembly of active polypeptide-polyribonucleotides complex in vivo or in vitro; and for re-programming a Cas9-crRNA complex specificity in vitro or using a cassette containing a single repeat-spacer-repeat unit.

Provided herein are methods and systems for altering the genome of an organelle. In some embodiments, the method comprises introducing into an organelle a recombinant DNA construct comprising a first polynucleotide encoding at least one guide RNA and a second polynucleotide encoding a polynucleotide guided polypeptide; and growing a cell comprising the organelle under conditions in which the first polynucleotide and the second polynucleotide are each expressed.

Aspects of the disclosure relate to complexes comprising a muscle-targeting agent covalently linked to a molecular payload. In some embodiments, the muscle-targeting agent specifically binds to an internalizing cell surface receptor on muscle cells. In some embodiments, the molecular payload inhibits activity of a pro-atrophy gene. In some embodiments, the molecular payload is an oligonucleotide, such as an antisense oligonucleotide or RNAi oligonucleotide.