Methods for the treatment of trinucleotide repeat expansion disorders associated with mlh1 activity

A single-stranded antisense oligonucleotide of 10-30 linked nucleosides in length for inhibiting expression of a human MLH1 gene in a cell, wherein the antisense oligonucleotide comprises a region of at least 10 contiguous nucleobases having at least 80% complementarity to an MLH1 gene.

The method of claim 67, wherein the non-polyglutamine disease is selected from the group consisting of fragile X syndrome, fragile X-associated tremor/ataxia syndrome, fragile XE mental retardation, Friedreich's ataxia, myotonic dystrophy type 1, spinocerebellar ataxia type 8, spinocerebellar ataxia type 12, oculopharyngeal muscular dystrophy, Fragile X-associated premature ovarian failure, FRA2A syndrome, FRA7A syndrome, and early infantile epileptic encephalopathy.

The antisense oligonucleotide, pharmaceutical composition, or composition for the use of claim 69, wherein the trinucleotide repeat expansion disorder is selected from the group consisting of dentatorubropallidoluysian atrophy, Huntington's disease, spinal and bulbar muscular atrophy, spinocerebellar ataxia type 1, spinocerebellar ataxia type 2, spinocerebellar ataxia type 3, spinocerebellar ataxia type 6, spinocerebellar ataxia type 7, spinocerebellar ataxia type 17, Huntington's disease-like 2, fragile X syndrome, fragile X-associated tremor/ataxia syndrome, fragile XE mental retardation, Friedreich's ataxia, myotonic dystrophy type 1, spinocerebellar ataxia type 8, spinocerebellar ataxia type 12, oculopharyngeal muscular dystrophy, Fragile X-associated premature ovarian failure, FRA2A syndrome, FRA7A syndrome, and early infantile epileptic encephalopathy.

A double-stranded ribonucleic acid (dsRNA), wherein the dsRNA comprises a sense strand and an antisense strand, wherein the antisense strand is complementary to at least 15 contiguous nucleobases of an MLH1 gene, and wherein the dsRNA comprises a duplex structure of between 15 and 30 linked nucleosides in length.

A dsRNA for reducing expression of MLH1 in a cell, wherein the dsRNA comprises a sense strand and an antisense strand, wherein the antisense strand is complementary to at least 15 contiguous nucleobases of an MLH1 gene, and wherein the dsRNA comprises a duplex structure of between 15 and 30 linked nucleosides in length.

The method of any one of claims 158, 166, and 162-164, wherein the subject is identified as having a trinucleotide repeat expansion disorder.

The dsRNA, the pharmaceutical composition, the composition, the vector, or the cell of claim 191, wherein the trinucleotide repeat expansion disorder is selected from the group consisting of dentatorubropallidoluysian atrophy, Huntington's disease, spinal and bulbar muscular atrophy, spinocerebellar ataxia type 1, spinocerebellar ataxia type 2, spinocerebellar ataxia type 3, spinocerebellar ataxia type 6, spinocerebellar ataxia type 7, spinocerebellar ataxia type 17, Huntington's disease-like 2, fragile X syndrome, fragile X-associated tremor/ataxia syndrome, fragile XE mental retardation, Friedreich's ataxia, myotonic dystrophy type 1, spinocerebellar ataxia type 8, spinocerebellar ataxia type 12, oculopharyngeal muscular dystrophy, Fragile X-associated premature ovarian failure, FRA2A syndrome, FRA7A syndrome, and early infantile epileptic encephalopathy.