Granted Patent
B2
US 12,473,553 · App. 17/520,113 · Granted Nov 18, 2025
RNA nanostructures and methods of making and using RNA nanostructures
Inventors:
Hao Yan (Chandler, AZ); Yung Chang (Tempe, AZ); Xiaowei Liu (Tempe, AZ); Fei Zhang (Chandler, AZ); Xiaodong Qi (Tempe, AZ)
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Abstract
Certain embodiments provide RNA nanostructure (e.g., comprising one single-stranded RNA (ssRNA) molecule, wherein the RNA nanostructure comprises at least one paranemic cohesion crossover), as well as compositions and methods of use thereof. In certain embodiments, such RNA nanostructures are immuno-modulatory (e.g., immuno-stimulatory).
Claims (26)
1 . A method of inducing an immune response in a subject, comprising administering to the subject a therapeutically effective amount of an RNA nanostructure,
wherein the RNA nanostructure comprises at least two structural repeating units of 33 nucleotides in length, and wherein each structural repeating unit comprises, in order: a first region of a double helix wherein the first region is 9 or fewer nucleotides in length, a first paranemic cohesion crossover of 7 or greater nucleotides in length, a second region of a double helix wherein the second region is 10 or fewer nucleotides in length, and a second paranemic cohesion crossover of 7 or greater nucleotides in length, or
wherein the RNA nanostructure has a three-dimensional structure and comprises:
(HD1-LD1-HD2-LD2) n
wherein n is selected from 2 to 6000;
wherein HD1 and HD2 are each an RNA helical domain;
wherein LD1 and LD2 each comprise at least one paranemic cohesion crossover,
wherein the RNA nanostructure further comprises at least one agent which is operably linked to said RNA nanostructure, wherein the agent is selected from a diagnostic agent or a therapeutic agent.
2 . The method of any one of claim 1 , further comprising administering at least one therapeutic agent to the subject.
3 . The method of claim 2 , wherein the at least one therapeutic agent is a tumor targeting agent.
4 . The method of claim 1 wherein the RNA nanostructure comprises a nucleic acid having at least about 75% identity to SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12 or SEQ ID NO: 13.
5 . The method of claim 4 , wherein the nucleic acid has at least about 90% identity to SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12 or SEQ ID NO: 13.
6 . The method of claim 5 , wherein the nucleic acid has at least about 95% identity to SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12 or SEQ ID NO: 13.
7 . The method of claim 6 , wherein the nucleic acid has at least about 99% identity to SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12 or SEQ ID NO: 13.
8 . The method of claim 7 , wherein the nucleic acid has the sequence of SEQ ID NO: 1.
9 . The method of claim 1 wherein the RNA nanostructure comprises at least one single-stranded RNA (ssRNA) molecule,
wherein the RNA nanostructure comprises at least two structural repeating units of 33 nucleotides in length, and wherein each structural repeating unit comprises, in order: a first region of a double helix wherein the first region is 9 or fewer nucleotides in length, a first paranemic cohesion crossover of 7 or greater nucleotides in length, a second region of a double helix wherein the second region is 10 or fewer nucleotides in length, and a second paranemic cohesion crossover of 7 or greater nucleotides in length.
10 . The method of claim 1 , wherein the paranemic cohesion crossover comprises 16 base pairings.
11 . The method of claim 1 , wherein the at least one paranemic cohesion crossover comprises between about 6 to about 10 GC base pairs.
12 . The method of claim 1 , wherein the operable linkage is selected from a covalent bond or charge-charge interaction.
13 . The method of claim 1 , wherein the diagnostic or therapeutic agent is a peptide comprising a positively-charged moiety.
14 . The method of claim 1 , wherein the positively-charged moiety is a peptide comprising from about 8 to 12 positively-charged amino acids.
15 . The method of claim 1 , wherein the positively-charged amino acids comprise a lysine residue.
16 . The method of claim 1 , wherein the therapeutic agent is a peptide selected from a tumor targeting peptide (TTP), a human cancer peptide, an infectious agent peptide, a tumor antigen peptide or calreticulin protein.
17 . The method of claim 16 , wherein the infectious agent peptide comprises specific epitopes for CD8+ T cells involved in the immunity against influenza, HIV, or HCV.
18 . The method of claim 1 , wherein the therapeutic agent is selected from calreticulin protein, human cancer peptide NY-ESO-1, Muc1, a tumor antigen peptide, or CTKD-K10 (CTKDNNLLGRFELSGGGSK10) (SEQ ID NO: 18).
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Nov 5, 2021
From: YAN, HAO; CHANG, YUNG; LIU, XIAOWEI; ZHANG, FEI; QI, XIAODONG
To: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
Reel/Frame 058033/0970 →
Continuity (9)
Continuation
16642792
Provisional Application
62637807
· Mar 2, 2018
Provisional Application
62630020
· Feb 13, 2018
Provisional Application
62625965
· Feb 2, 2018
Provisional Application
62596697
· Dec 8, 2017
Provisional Application
62594473
· Dec 4, 2017
Provisional Application
62594471
· Dec 4, 2017
Provisional Application
62552183
· Aug 30, 2017
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