The present invention provides an oligomer which efficiently enables to cause skipping of the 53rd exon in the human dystrophin gene. Also provided is a pharmaceutical composition which causes skipping of the 53rd exon in the human dystrophin gene with a high efficiency.

Antisense oligomer conjugates complementary to a selected target site in the human dystrophin gene to induce exon 53 skipping are described.

The current disclosure provides for peptide-conjugated phosphorodiamidate morpholino oligomers (PPMOs) antisense oligonucleotides that target plant pathogens and insect pests by targeting the microbes within the insect pest. Methods of delivering PPMOs to bacteria in plants, in insect carriers, and to the insects via plant feeding are also provided.

Provided are LMNA-targeted antisense oligonucleotides for reducing expression of one or more aberrantly spliced LMNA mRNA isoforms that encode progerin.

Provided are LMNA-targeted antisense oligonucleotides for reducing expression of one or more aberrantly spliced LMNA mRNA isoforms that encode progerin.

Aspects of the disclosure include methods for the preparation of a polynucleotide. In some embodiments, the method includes contacting a first polynucleotide composition including: a polynucleotide having a sequence of 7 or more nucleoside subunits and at least two of the nucleoside subunits are joined by a N3.fwdarw.P5 thiophosphoramidate inter-subunit linkage; and non-target synthetic products and reagents; with a multivalent cation salt to precipitate a polynucleotide salt including at least one multivalent cation counterion; and separating the polynucleotide salt from the contacted first polynucleotide composition to produce a second polynucleotide composition including the polynucleotide salt. In certain embodiments, the method further includes contacting the polynucleotide salt with a reverse phase chromatography support; and eluting from the chromatography support a third polynucleotide composition including the polynucleotide. Also provided are compositions including a salt of the polynucleotide including at least one multivalent cation counterion.

Aspects of the disclosure include methods for the preparation of a polynucleotide. In some embodiments, the method includes contacting a first polynucleotide composition including: a polynucleotide having a sequence of 7 or more nucleoside subunits and at least two of the nucleoside subunits are joined by a N3.fwdarw.P5 thiophosphoramidate inter-subunit linkage; and non-target synthetic products and reagents; with a multivalent cation salt to precipitate a polynucleotide salt including at least one multivalent cation counterion; and separating the polynucleotide salt from the contacted first polynucleotide composition to produce a second polynucleotide composition including the polynucleotide salt. In certain embodiments, the method further includes contacting the polynucleotide salt with a reverse phase chromatography support; and eluting from the chromatography support a third polynucleotide composition including the polynucleotide. Also provided are compositions including a salt of the polynucleotide including at least one multivalent cation counterion.

The present invention provides morpholino modified oligomeric compounds having at least one monomer subunit having Formula III, compounds having Formula I useful for making certain of the morpholino modified oligomeric compounds and methods of using the oligomeric compounds. In certain embodiments, the oligomeric compounds provided herein provide for an improved toxicity profile. Certain such oligomeric compounds are useful for hybridizing to a complementary nucleic acid, including but not limited, to nucleic acids in a cell. In certain embodiments, hybridization results in modulation of the amount of activity or expression of the target nucleic acid in a cell.

The invention relates to a method for repairing aberrant splicing in Pompe patients that carry the IVS1 variant, wherein such aberrant splicing is caused by the expression of a natural pseudo exon present in GAA intron 1, comprising blocking of either the natural cryptic 3 splice site or the natural cryptic 5 splice site of said natural pseudo exon with an antisense oligomeric compound (AON). Further, the invention comprises an antisense oligomeric compound targeting SEQ ID NO: 1 or SEQ ID NO: 180, preferably selected from the sequences of SEQ ID NO: 91-179, sequences that are complementary to said sequences or sequences that have an identity of 80% with said sequences or the complementary sequences and a second AON from the sequences of SEQ ID NO: 346-508, sequences that are complementary to said sequences or sequences that have an identity of 80% with said sequences or the complementary sequences.

The invention relates to a method for repairing aberrant splicing in Pompe patients that carry the IVS1 variant, wherein such aberrant splicing is caused by the expression of a natural pseudo exon present in GAA intron 1, comprising blocking of either the natural cryptic 3 splice site or the natural cryptic 5 splice site of said natural pseudo exon with an antisense oligomeric compound (AON). Further, the invention comprises an antisense oligomeric compound targeting SEQ ID NO: 1 or SEQ ID NO: 180, preferably selected from the sequences of SEQ ID NO: 91-179, sequences that are complementary to said sequences or sequences that have an identity of 80% with said sequences or the complementary sequences and a second AON from the sequences of SEQ ID NO: 346-508, sequences that are complementary to said sequences or sequences that have an identity of 80% with said sequences or the complementary sequences.