Bottom-up assembly of synthetic extracellular vesicles

Patent metadata

Field	Value
Publication number	US-12569439-B2
Application number	US-202117759768-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	Jan 31, 2020
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

The present invention relates to a method for producing synthetic extracellular vesicles comprising a lipid bilayer including at least two lipids, one or more extracellular vesicle associated proteins, and optionally one or more nucleic acid molecules. The inventive synthetic extracellular vesicles are formed by emulsification using a mechanic emulsifier in the form of polymer shell stabilized synthetic extracellular vesicles. The inventive method allows producing synthetic extracellular vesicles miming the composition and function of natural extracellular vesicles. Therefore, synthetic extracellular vesicles with specific protein and nucleic acids compositions are also disclosed herein, as well as their therapeutic uses.

First claim

The invention claimed is:

1 . A method for producing synthetic extracellular vesicles comprising:
a) providing a water phase comprising at least two lipids, and one or more extracellular vesicle associated proteins or fragments thereof, wherein the at least two lipids are a negative charged lipid, and a lipid coupled to a functional ligand for conjugation to the one or more extracellular vesicle associated protein or fragments thereof; b) providing an amphiphilic copolymer dissolved in an oil phase, wherein the amphiphilic copolymer is a diblock copolymer consisting of a hydrophobic polymer block and a hydrophilic polymer block, or a triblock copolymer consisting of two hydrophobic polymer blocks and a hydrophilic polymer block, and wherein the oil phase comprises a fluorosurfactant triblock; c) combining said water phase and said oil phase; d) producing polymer shell-stabilized synthetic extracellular vesicles by emulsifying the combined phases of c) using a mechanic or electronic emulsifier; wherein the amphiphilic copolymer forms a polymer shell stabilizing the synthetic extracellular vesicle, wherein the one or two hydrophobic polymer blocks are arranged at the outer side and the hydrophilic polymer block is arranged at the inner side of the polymer shell, wherein the vesicles are homogenous in size showing a coefficient of variation in size lower than 13%, and wherein the synthetic extracellular vesicles have a hydrodynamic radius between 70 nm and 5000 nm.

2 . The method according to claim 1 , wherein the water phase further comprises one or more nucleic acid molecules.

3 . The method according to claim 1 , further comprising d′) and e) after d):
d′) removing the polymer shell from the polymer shell-stabilized synthetic extracellular vesicles obtained in d) by adding a surfactant; and
e) purifying the synthetic extracellular vesicles by centrifugation.

4 . The method according to claim 1 , wherein the water phase of a) comprises at least one lipid coupled to a functional ligand selected from biotin, N-hydroxysuccinimide ester, N-hydroxysulfosuccinimide, nitrilotriacetic acid-nickel, amine, carboxylic acid, maleimide, aromatic maleimid, dithiopyridinyl, pyridyl disulfide, pyridyldithiopropionate, N-benzylguanine, cyanuric chloride, carboxyacyl, cyanur, folate, square, galloyl, glycan, thiol, arginylglycylaspartic acid, a fluorescent dye molecule, a magnetic resonance imaging reagent, a chelator; and
wherein the method optionally comprises after e) the following step:
f) coupling the synthetic extracellular vesicles with at least one macromolecule comprising at least one moiety reacting with one of said functional ligands, wherein the macromolecule is selected from the group comprising an extracellular vesicle associated protein or a fragment thereof, a carbohydrate, a nucleic acid, a polypeptide, a cell receptor, an imaging probe.

5 . The method according to claim 1 , wherein the extracellular vesicle associated protein, or a fragment thereof, is selected from the group comprising:
a transmembrane protein selected from the group comprising tetraspanin proteins CD9, CD37, CD47, CD53, CD63, CD81, CD82, CD151, Tspan8, heterotrimeric G protein subunit alpha, integrin α-chains, integrin β-chains, transferrin receptor 1, transferrin receptor 2, lysosome associated membrane proteins, heparan sulfate proteoglycans, syndecans, extracellular matrix metalloproteinase inducer, A Disintegrin And Metalloproteinase Domain 10, CD3, CD11c, CD14, CD29, CD31, CD41, CD42a, CD44, CD45, CD50 or intercellular adhesion molecule 1, CD55, CD59, CD73, CD80, CD86, CD90, sonic hedgehog, major histocompatibility complex I, major histocompatibility complex II, epidermal growth factor receptor 2, epithelial cell adhesion molecule, glycophorin A, Acetylcholinesterase S and E, amyloid beta precursor protein, multidrug resistance-associated protein 1, stem cells antigen-1, or a fragment thereof; a cytosolic protein selected from the group comprising the protein complexes endosomal sorting complexes required for transport I, II and III, tumour susceptibility gene 101, charged multivesicular body protein, Apoptosis-Linked Gene 2-Interacting Protein X, vacuolar protein sorting 4 homolog A 4A and 4B, arrestin domain-containing protein, flotillin-1, flotillin-2; caveolins, EH-domain containing 1-4, ras homolog family member A, annexins, heat shock proteins, ADP-ribosylation factor 6, syntenin, microtubule-associated protein Tau, or a fragment thereof; a functional protein selected from the group comprising cytokines, growth factors, interleukins, milk fat globule-EGF factor 8 protein, adhesion proteins, extracellular matrix proteins, nicotinamide phosphoribosyltransferase, signal transduction proteins, Wnta, Wntb, Fas, Fas Ligand, RANK, RANK Ligand, indolamin-2,3-dioxygenase, cytotoxic T-lymphocyte-associated protein 4-immunoglobulin fusion protein, tumor necrosis factor-related apoptosis-inducing ligand, or a fragment thereof; and a protein associated to intracellular compartments selected from the group comprising histone proteins, lamin A/C, inner membrane mitochondrial protein, cytochrome C-1, mitochondrial import receptor subunit TOM20, calnexin, heat shock protein 90 kDa beta, member 1, heat shock 70 kDa protein 5, Golgin A2, Autophagy Related 9A, actinin1, actinin4, cytokeratin 18, or a fragment thereof.

6 . The method according to claim 2 , wherein the water phase of a) comprises one or more nucleic acid molecules selected from the group comprising miRNA molecules miR-17, miR-18a, miR-19a, miR-19b-1, miR-20a, miR-92a; miR-21, miR-30d-5p, miR-33b, miR-124, miR-125, miR-126, miR-130, miR-132, miR-133b, miR-140-5p, miR-191, miR-222, miR-451, miR-494, miR-575, miR-630, miR-638, miR-1202, miR-1207-5p, miR-1225-5p, miR-1268, miR-6087, miR-92a-3p-e, miR-K12-3, let-7a.

7 . The method according to claim 1 , wherein the water phase of a) comprises at least two lipids selected from the group comprising:
a neutral lipid selected from the group comprising ceramide, sphingomyelin, cephalin, cholesterol, cerebrosides, diacylglycerols, phosphatidylcholines, lysophosphatidylcholines, phosphatidylethanolamines, lysophosphatidylethanolamine, lysoethanolamines, inverted headgroup lipids, sphingosins, sterol-modified phospholipids, ether ester lipids, diether lipids, vinyl ether, plasmalogen; an anionic lipid selected from the group comprising phosphatidic acids, lysophosphatidic acid derivatives, phosphatidylglycerols, lysophosphatidylglycerols, phosphatidylserines, lysophosphatidylserines, phosphatidylinositols, phosphatidylinositolphosphates, cardiolipins, Bis(Monoacylglycero)Phosphate derivatives; a cationic lipid selected from the group comprising dioleyl-N,N-dimethylammonium chloride; N-(2,3-dioleyloxy)propyl)-N,N,N-trimethylammonium chloride; N,N-distearyl-N,N-dimethylammonium bromide; N-(2,3-dioleyloxy)propyl)-N,N,N-trimethylammonium chloride; 3β-(N-(N′,N′-dimethylaminoethane)-carbamoyl) cholesterol; 1,2-dimyristyloxypropyl-3-dimethyl-hydroxy ethyl ammonium bromide; 2,3-dioleyloxy-N-[2 (sperminecarboxamido) ethyl]-N,N-dimethyl-1-propanaminium trifluoroacetate; dioctadecylamidoglycyl carboxyspermine; N-(2,3-dioleyloxy)propyl)-N,N-dimethylammonium chloride and 1,2-Dioleoyl-3-dimethylammonium-propane; a pH-sensitive lipid selected from the group comprising lipid N-(4-carboxybenzyl)-N,N-dimethyl-2,3-bis(oleoyloxy)propan-1-aminium, 1,2-distearoyl-3-dimethylammonium-propane, 1,2-dipalmitoyl-sn-glycero-3-succinate, 1,2-dioleoyl-sn-glycero-3-succinate, N-palmitoyl homocysteine; a photoswitchable lipid; acylglycine derivatives, prenol derivatives, prostaglandine derivatives, glycosylated diacyl glycerols, eicosanoid derivatives, (palmitoyloxy) octadecanoic acid derivatives, diacetylene derivatives,

Assignees

• Max Planck Gesellschaft

Inventors

• Staufer Oskar
• Plazman Yilia
• Spatz Joachim P

Classifications

• C12Y204/02012

  Nicotinamide phosphoribosyltransferase (2.4.2.12), i.e. visfatin · CPC title

• C12N2310/141

  MicroRNAs, miRNAs · CPC title

• C12N15/88

  using microencapsulation, e.g. using {amphiphile} liposome vesicle · CPC title

• C12N15/113

  Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; {Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing (when used in plants C12N15/8218)} · CPC title

• C07K14/70596

  Molecules with a "CD"-designation not provided for elsewhere · CPC title