Delivery, use and therapeutic applications of the crispr-cas systems and compositions for hbv and viral diseases and disorders

Patent metadata

Field	Value
Publication number	US-2025381297-A1
Application number	US-202519079848-A
Country	US
Kind code	A1
Filing date	Mar 14, 2025
Priority date	Dec 12, 2013
Publication date	Dec 18, 2025
Grant date	—

Abstract

The invention provides for delivery, engineering and optimization of systems, methods, and compositions for manipulation of sequences and/or activities of target sequences. Provided are delivery systems and tissues or organ which are targeted as sites for delivery. Also provided are vectors and vector systems some of which encode one or more components of a CRISPR complex, as well as methods for the design and use of such vectors. Also provided are methods of directing CRISPR complex formation in eukaryotic cells to ensure enhanced specificity for target recognition and avoidance of toxicity and to edit or modify a target site in a genomic locus of interest to alter or improve the status of a disease or a condition.

First claim

1 - 33 . (canceled)

34 . A method of treating a hepatitis B virus (HBV) infection in a mammal, comprising administering an effective amount of a CRISPR-Cas system to the mammal, wherein the CRISPR-Cas system comprises
(i) a catalytically inactive CRISPR protein that is fused to a transcriptional repressor or a polynucleotide encoding a catalytically inactive CRISPR protein that is fused to a transcriptional repressor, (ii) a CRISPR-Cas system polynucleotide targeting a target HBV sequence comprised both in an HBV covalently closed circular DNA (cccDNA) and in an HBV DNA integrated into the genome of a liver cell, wherein the CRISPR-Cas system polynucleotide comprises:
(a) a guide sequence capable of hybridizing to the target HBV sequence,
(b) a tracr sequence, and
(c) a tracr mate sequence capable of hybridizing to the tracr sequence,

wherein the CRISPR-Cas system polynucleotide forms a CRISPR complex with the CRISPR protein in the liver cell and directs sequence-specific binding of the CRISPR complex to the target HBV sequence both in the HBV cccDNA and in the HBV DNA integrated into the genome of the liver cell,
thereby resulting in the transcriptional repressor repressing the expression of both the HBV cccDNA and the HBV DNA integrated into the genome of the liver cell and reducing HBsAg, serum HBV DNA and HBV RNA in vivo in the mammal.

35 . The method of claim 34 , wherein the catalytically inactive CRISPR protein further comprises a heterologous functional domain selected from a transcriptional activator, a transcriptional repressor, a recombinase, a transposase, a histone remodeler, a demethylase, or a DNA methyltransferase.

36 . The method of claim 35 , wherein the heterologous functional domain is a DNA methyltransferase.

37 . The method of claim 35 , wherein the heterologous functional domain is VP64, SID4X, or KRAB.

38 . The method of claim 34 , wherein the CRISPR protein further comprises one or more nuclear localization sequences (NLSs) capable of driving the accumulation of the CRISPR protein to a detectible amount in the nucleus of the liver cell.

39 . The method of claim 38 , wherein the CRISPR protein comprises at least one NLS at or near the amino-terminus of the CRISPR protein and/or at least one NLS at or near the carboxy-terminus the CRISPR protein.

40 . The method of claim 34 , wherein the CRISPR-Cas system is comprised in a liposome or a lipid particle.

41 . The method of claim 34 , wherein the CRISPR protein is Cas9.

42 . The method of claim 41 , wherein the CRISPR protein is Staphylococcus aureus Cas9.

43 . The method of claim 41 , wherein the CRISPR protein is Streptococcus pyogenes Cas9.

44 . The method of claim 34 , wherein the CRISPR protein and/or the CRISPR-Cas system polynucleotides are encoded or comprised within a vector system comprising one or more vectors.

45 . The method of claim 44 , wherein the one or more vectors comprise one or more viral vectors.

46 . The method of claim 45 , wherein the one or more viral vectors comprise one or more lentiviral, adenoviral or adeno-associated viral (AAV) vectors.

47 . The method of claim 34 , wherein the CRISPR-Cas system polynucleotide is a chimeric RNA (chiRNA).

48 . The method of claim 44 , wherein the CRISPR protein and the CRISPR-Cas system polynucleotides are encoded in a single vector.

49 . The method of claim 34 , further comprising administering an additional HBV treatment to the mammal.

50 . The method of claim 49 , wherein the additional treatment comprises an epigenetic modifier.

51 . The method of claim 50 , wherein the epigenetic modifier selected from trichostatin A (TSA), valproate, and nicotinamide (NAM), or Type I interferon.

52 . The method of claim 34 , wherein the mammal is a human subject.

Assignees

• Broad Inst Inc
• Massachusetts Inst Technology
• Univ Rockefeller

Inventors

• Bhatia Sangeeta
• Rice Charles
• Zhang Feng
• Cox David Benjamin Turitz
• Ramanan Vyas
• Schwartz Robert
• Shlomai Amir

Classifications

• G06Q10/40

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