CN113699122A - 一种多基因融合溶瘤腺病毒及其构建方法和应用 - Google Patents
一种多基因融合溶瘤腺病毒及其构建方法和应用 Download PDFInfo
- Publication number
- CN113699122A CN113699122A CN202111010563.5A CN202111010563A CN113699122A CN 113699122 A CN113699122 A CN 113699122A CN 202111010563 A CN202111010563 A CN 202111010563A CN 113699122 A CN113699122 A CN 113699122A
- Authority
- CN
- China
- Prior art keywords
- gene
- cd40l
- adenovirus
- dcn
- promoter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 241000701161 unidentified adenovirus Species 0.000 title claims abstract description 98
- 230000000174 oncolytic effect Effects 0.000 title claims abstract description 86
- 230000004927 fusion Effects 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 title description 13
- 108010029697 CD40 Ligand Proteins 0.000 claims abstract description 88
- 102100032937 CD40 ligand Human genes 0.000 claims abstract description 72
- 206010028980 Neoplasm Diseases 0.000 claims abstract description 47
- 230000014509 gene expression Effects 0.000 claims abstract description 40
- 206010009944 Colon cancer Diseases 0.000 claims abstract description 34
- 208000001333 Colorectal Neoplasms Diseases 0.000 claims abstract description 34
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 33
- 101150030537 DCN gene Proteins 0.000 claims abstract description 26
- 238000011282 treatment Methods 0.000 claims abstract description 24
- 230000010076 replication Effects 0.000 claims abstract description 16
- 108700005075 Regulator Genes Proteins 0.000 claims abstract description 7
- 102100035784 Decorin Human genes 0.000 claims description 59
- 239000013612 plasmid Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 108010017842 Telomerase Proteins 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000003814 drug Substances 0.000 claims description 9
- 229940123373 Adenovirus E1A gene Drugs 0.000 claims description 7
- 238000010367 cloning Methods 0.000 claims description 7
- 108020004684 Internal Ribosome Entry Sites Proteins 0.000 claims description 6
- 238000001976 enzyme digestion Methods 0.000 claims description 5
- 238000002560 therapeutic procedure Methods 0.000 claims description 5
- 230000006801 homologous recombination Effects 0.000 claims description 3
- 238000002744 homologous recombination Methods 0.000 claims description 3
- 108700026220 vif Genes Proteins 0.000 claims description 3
- 108090000790 Enzymes Proteins 0.000 claims description 2
- 102000004190 Enzymes Human genes 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 238000007876 drug discovery Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 108090000738 Decorin Proteins 0.000 abstract description 19
- ZRKFYGHZFMAOKI-QMGMOQQFSA-N tgfbeta Chemical compound C([C@H](NC(=O)[C@H](C(C)C)NC(=O)CNC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CC(N)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CC(C)C)NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](CO)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H](NC(=O)[C@H](C)NC(=O)[C@H](C)NC(=O)[C@@H](NC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CCSC)C(C)C)[C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)N1[C@@H](CCC1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CC(C)C)C(O)=O)C1=CC=C(O)C=C1 ZRKFYGHZFMAOKI-QMGMOQQFSA-N 0.000 abstract description 19
- 210000004881 tumor cell Anatomy 0.000 abstract description 19
- 102000004237 Decorin Human genes 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 17
- 244000309459 oncolytic virus Species 0.000 abstract description 17
- 241000700605 Viruses Species 0.000 abstract description 16
- 206010027476 Metastases Diseases 0.000 abstract description 13
- 230000009401 metastasis Effects 0.000 abstract description 13
- 230000005975 antitumor immune response Effects 0.000 abstract description 9
- 230000008685 targeting Effects 0.000 abstract description 8
- 230000003213 activating effect Effects 0.000 abstract description 7
- 230000000259 anti-tumor effect Effects 0.000 abstract description 5
- 230000006907 apoptotic process Effects 0.000 abstract description 4
- 230000005934 immune activation Effects 0.000 abstract description 4
- 238000011269 treatment regimen Methods 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 230000035755 proliferation Effects 0.000 abstract description 3
- 102000004169 proteins and genes Human genes 0.000 abstract description 3
- 230000003362 replicative effect Effects 0.000 abstract description 3
- 230000028327 secretion Effects 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 description 40
- 241000699666 Mus <mouse, genus> Species 0.000 description 12
- 230000002401 inhibitory effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 241000699670 Mus sp. Species 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 108091008146 restriction endonucleases Proteins 0.000 description 6
- 238000002054 transplantation Methods 0.000 description 6
- 102000004887 Transforming Growth Factor beta Human genes 0.000 description 5
- 108090001012 Transforming Growth Factor beta Proteins 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 230000012010 growth Effects 0.000 description 5
- 210000005259 peripheral blood Anatomy 0.000 description 5
- 239000011886 peripheral blood Substances 0.000 description 5
- 210000003289 regulatory T cell Anatomy 0.000 description 5
- IOOMXAQUNPWDLL-UHFFFAOYSA-N 2-[6-(diethylamino)-3-(diethyliminiumyl)-3h-xanthen-9-yl]-5-sulfobenzene-1-sulfonate Chemical compound C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=C(S(O)(=O)=O)C=C1S([O-])(=O)=O IOOMXAQUNPWDLL-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000000338 in vitro Methods 0.000 description 4
- 230000002147 killing effect Effects 0.000 description 4
- 230000001404 mediated effect Effects 0.000 description 4
- 230000001225 therapeutic effect Effects 0.000 description 4
- 230000004614 tumor growth Effects 0.000 description 4
- 101150013553 CD40 gene Proteins 0.000 description 3
- 210000001744 T-lymphocyte Anatomy 0.000 description 3
- 102000009618 Transforming Growth Factors Human genes 0.000 description 3
- 108010009583 Transforming Growth Factors Proteins 0.000 description 3
- 102100040245 Tumor necrosis factor receptor superfamily member 5 Human genes 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 210000003162 effector t lymphocyte Anatomy 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000001415 gene therapy Methods 0.000 description 3
- 210000002865 immune cell Anatomy 0.000 description 3
- 230000036039 immunity Effects 0.000 description 3
- 230000001506 immunosuppresive effect Effects 0.000 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 238000001727 in vivo Methods 0.000 description 3
- 230000005917 in vivo anti-tumor Effects 0.000 description 3
- 208000015181 infectious disease Diseases 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 210000003071 memory t lymphocyte Anatomy 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 210000004985 myeloid-derived suppressor cell Anatomy 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 108060000903 Beta-catenin Proteins 0.000 description 2
- 102000015735 Beta-catenin Human genes 0.000 description 2
- 108010017213 Granulocyte-Macrophage Colony-Stimulating Factor Proteins 0.000 description 2
- 102100039620 Granulocyte-macrophage colony-stimulating factor Human genes 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000009169 immunotherapy Methods 0.000 description 2
- 230000005918 in vitro anti-tumor Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000029812 viral genome replication Effects 0.000 description 2
- 102000010400 1-phosphatidylinositol-3-kinase activity proteins Human genes 0.000 description 1
- 102100031168 CCN family member 2 Human genes 0.000 description 1
- 101710132601 Capsid protein Proteins 0.000 description 1
- 108700039887 Essential Genes Proteins 0.000 description 1
- 208000009889 Herpes Simplex Diseases 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 101000777550 Homo sapiens CCN family member 2 Proteins 0.000 description 1
- 101000808011 Homo sapiens Vascular endothelial growth factor A Proteins 0.000 description 1
- 241001135569 Human adenovirus 5 Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 108091008036 Immune checkpoint proteins Proteins 0.000 description 1
- 102000037982 Immune checkpoint proteins Human genes 0.000 description 1
- 206010062016 Immunosuppression Diseases 0.000 description 1
- 102000003815 Interleukin-11 Human genes 0.000 description 1
- 108090000177 Interleukin-11 Proteins 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 108010001657 NK Cell Lectin-Like Receptor Subfamily K Proteins 0.000 description 1
- 102000000812 NK Cell Lectin-Like Receptor Subfamily K Human genes 0.000 description 1
- 108091007960 PI3Ks Proteins 0.000 description 1
- 108700020797 Parathyroid Hormone-Related Proteins 0.000 description 1
- 102000043299 Parathyroid hormone-related Human genes 0.000 description 1
- 108010065917 TOR Serine-Threonine Kinases Proteins 0.000 description 1
- 102000013530 TOR Serine-Threonine Kinases Human genes 0.000 description 1
- 108010019530 Vascular Endothelial Growth Factors Proteins 0.000 description 1
- 102000005789 Vascular Endothelial Growth Factors Human genes 0.000 description 1
- 102100039037 Vascular endothelial growth factor A Human genes 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033115 angiogenesis Effects 0.000 description 1
- 230000003527 anti-angiogenesis Effects 0.000 description 1
- 230000005809 anti-tumor immunity Effects 0.000 description 1
- 229940125644 antibody drug Drugs 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000001185 bone marrow Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 239000006143 cell culture medium Substances 0.000 description 1
- 230000022534 cell killing Effects 0.000 description 1
- 230000004663 cell proliferation Effects 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 230000000139 costimulatory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000002222 downregulating effect Effects 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000009509 drug development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000017188 evasion or tolerance of host immune response Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229950004003 fresolimumab Drugs 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007490 hematoxylin and eosin (H&E) staining Methods 0.000 description 1
- 230000005746 immune checkpoint blockade Effects 0.000 description 1
- 230000036737 immune function Effects 0.000 description 1
- 230000006058 immune tolerance Effects 0.000 description 1
- 230000007365 immunoregulation Effects 0.000 description 1
- 230000001024 immunotherapeutic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000019734 interleukin-12 production Effects 0.000 description 1
- 230000002601 intratumoral effect Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000000822 natural killer cell Anatomy 0.000 description 1
- 230000000010 osteolytic effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000012679 serum free medium Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000007447 staining method Methods 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229940126585 therapeutic drug Drugs 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
- 230000005748 tumor development Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N7/00—Viruses; Bacteriophages; Compositions thereof; Preparation or purification thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/66—Microorganisms or materials therefrom
- A61K35/76—Viruses; Subviral particles; Bacteriophages
- A61K35/761—Adenovirus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/1703—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- A61K38/1709—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/177—Receptors; Cell surface antigens; Cell surface determinants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
- A61K48/005—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy characterised by an aspect of the 'active' part of the composition delivered, i.e. the nucleic acid delivered
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4725—Proteoglycans, e.g. aggreccan
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/70575—NGF/TNF-superfamily, e.g. CD70, CD95L, CD153, CD154
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/85—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2710/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA dsDNA viruses
- C12N2710/00011—Details
- C12N2710/10011—Adenoviridae
- C12N2710/10311—Mastadenovirus, e.g. human or simian adenoviruses
- C12N2710/10321—Viruses as such, e.g. new isolates, mutants or their genomic sequences
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2710/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA dsDNA viruses
- C12N2710/00011—Details
- C12N2710/10011—Adenoviridae
- C12N2710/10311—Mastadenovirus, e.g. human or simian adenoviruses
- C12N2710/10332—Use of virus as therapeutic agent, other than vaccine, e.g. as cytolytic agent
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2710/00—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA dsDNA viruses
- C12N2710/00011—Details
- C12N2710/10011—Adenoviridae
- C12N2710/10311—Mastadenovirus, e.g. human or simian adenoviruses
- C12N2710/10351—Methods of production or purification of viral material
- C12N2710/10352—Methods of production or purification of viral material relating to complementing cells and packaging systems for producing virus or viral particles
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2800/00—Nucleic acids vectors
- C12N2800/10—Plasmid DNA
- C12N2800/106—Plasmid DNA for vertebrates
- C12N2800/107—Plasmid DNA for vertebrates for mammalian
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Zoology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Pharmacology & Pharmacy (AREA)
- Veterinary Medicine (AREA)
- Biotechnology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Biochemistry (AREA)
- Wood Science & Technology (AREA)
- Immunology (AREA)
- Epidemiology (AREA)
- Molecular Biology (AREA)
- Gastroenterology & Hepatology (AREA)
- Biomedical Technology (AREA)
- Virology (AREA)
- General Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Biophysics (AREA)
- Toxicology (AREA)
- Cell Biology (AREA)
- Mycology (AREA)
- Plant Pathology (AREA)
- Physics & Mathematics (AREA)
- Marine Sciences & Fisheries (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
本发明公开了一种多基因融合溶瘤腺病毒,该溶瘤腺病毒以Adeasy载体系统为基础,插入DCN基因表达框、腺病毒复制调控基因序列及CD40L基因表达框。本发明以溶瘤腺病毒为载体,联合靶向TGFβ和靶向CD40‑CD40L的治疗策略,协同发挥其抗肿瘤免疫激活效应,提升结直肠癌的治疗水平。肿瘤局部给药后,首先通过溶瘤作用杀灭肿瘤细胞;同时不断复制的病毒能够持续产生大量的目的蛋白decorin和CD40L。局部高浓度的decorin,可阻断肿瘤细胞内异常激活的TGFβ信号,抑制转移相关蛋白的表达与分泌。同时,CD40L能够激活机体抗肿瘤免疫反应、抑制肿瘤细胞增殖和促进肿瘤细胞凋亡。协同发挥其在改善肿瘤免疫微环境和激活机体抗肿瘤免疫反应中的作用,更加长效地发挥溶瘤病毒的作用。
Description
技术领域
本发明属于生物技术领域,尤其是涉及一种多基因融合溶瘤腺病毒及其构建方法和应用。
背景技术
近年来,我国结直肠癌的发病率呈逐年上升的趋势,仅次于肺癌,位居第二位。目前,结直肠癌的主要治疗手段是手术切除治疗,放射治疗和化学治疗的效果并不理想。因此,急需探索一种更加有效的治疗手段。
近年来,溶瘤病毒治疗发展迅速,已有多项溶瘤病毒治疗药物进入临床II-III期研究阶段。2015年10月,美国FDA批准了携带粒细胞-巨噬细胞集落刺激因子(Granulocyte-macrophage colony stimutaing factor,GM-CSF)的单纯疱疹溶瘤病(T-VEC)进入市场,为溶瘤病毒治疗注入了一支强心针。目前,在临床试验中应用最为广泛的是溶瘤腺病毒,我国早在2006年,我国就批准了全球第一个溶瘤腺病毒药物上市。溶瘤腺病毒的主要构建策略之一,是用组织特异性启动子替换天然的病毒启动子来控制病毒复制启动基因的表达,得到转录调控型的溶瘤腺病毒。
在理论上,溶瘤腺病毒可以在肿瘤细胞中复制并裂解肿瘤细胞,释放病毒,进一步感染周围的其他肿瘤细胞,进而发挥级联放大作用,最终达到消灭肿瘤的目的。然而,实际上,溶瘤腺病毒的疗效往往受到多种因素的制约,如,人体内普遍存在5型腺病毒抗体,可清除溶瘤溶瘤腺病毒;启动病毒复制的肿瘤特异性启动子效率达不到预想等。
近年来,通过多种方式对溶瘤腺病毒进行修饰,能够显著提高溶瘤腺病毒的疗效,如通过携带自杀基因,提高对肿瘤细胞的杀伤效率;通过携带免疫基因,调节机体及肿瘤局部的免疫状态;通过携带抗血管生成基因,阻断肿瘤细胞转移相关信号激活等。因此,将溶瘤腺病毒治疗与基因治疗联合应用,已经成为溶瘤病毒治疗的重要方向和热点。
发明内容
本发明的第一个目的是针对现有技术中存在的上述问题,提供一种多基因融合溶瘤腺病毒;本发明的第二个目的是提供一种上述多基因融合溶瘤腺病毒的构建方法;本发明的第三个目的是提供一种上述多基因融合溶瘤腺病毒在制备用于治疗结直肠癌的药物中的应用。
本发明的第一个目的可通过下列技术方案来实现:一种多基因融合溶瘤腺病毒,包括该溶瘤腺病毒以Adeasy载体系统为基础,插入DCN基因表达框、腺病毒复制调控基因序列及CD40L基因表达框。
可选的,所述DCN基因表达框、腺病毒复制调控基因序列及CD40L基因表达框均插入在腺病毒基因组E1区中。
可选的,所述DCN基因表达框由cmv启动子和DCN基因组成。
可选的,所述CD40L基因表达框由天然E1B启动子和CD40L基因组成。
可选的,所述腺病毒复制调控基因序列包括端粒酶启动子TERTp、腺病毒E1区复制起始基因E1A及E1B55K,其中所述的腺病毒E1A基因由端粒酶启动子TERTp调控,所述E1B55K由天然E1B启动子调控。
优选的,所述CD40L基因插入至天然E1B启动子和E1B55K之间,即天然E1B启动子同时调控CD40L基因和E1B55K基因。
优选的,从序列的5’至3’方向为:cmv启动子-DCN基因-TERTp-腺病毒E1A基因-天然E1B启动子-CD40L基因-IRES-E1B55K。
本发明的第二个目的可通过下列技术方案来实现:一种如上述的多基因融合溶瘤腺病毒的构建方法,包括以下步骤:
S1:将DCN基因插入到pshuttle-cmv载体中,获得pSh.cmv.DCN;
S2:端粒酶启动子TERTp、腺病毒E1A基因、天然E1B启动子、CD40L基因、核糖体内部进入位点及E1B55K顺次相连,克隆到TE载体上获得TE-TP-E1A-CD40L,酶切TE-TP-E1A-CD40L后获取复制相关基因,将所述复制相关基因克隆到pSh.cmv.DCN的相应位点,获得穿梭质粒;
S3:酶切穿梭质粒,电转感受态细胞,与Adeasy-1同源重组获得重组腺病毒质粒;酶切重组腺病毒质粒后转染HEK293细胞,获得溶瘤腺病毒。
本发明的第三个目的可通过下列技术方案来实现:一种如上述多基因融合溶瘤腺病毒在制备用于治疗结直肠癌的药物中的应用。该药物用于结直肠癌治疗,包括TGF-β不敏感的结直肠癌治疗。
本发明的第四个目的可通过下列技术方案来实现:一种如上述多基因融合溶瘤腺病毒在肿瘤治疗及药物研发中的应用。
综上所述,本发明的有益效果为:
1、本发明以溶瘤腺病毒为载体,联合靶向TGFβ和靶向CD40-CD40L的治疗策略,协同发挥其抗肿瘤免疫激活效应,提升结直肠癌的治疗水平。肿瘤局部给药后,首先通过溶瘤作用杀灭肿瘤细胞;同时不断复制的病毒能够持续产生大量的目的蛋白decorin和CD40L。局部高浓度的decorin,可阻断肿瘤细胞内异常激活的TGFβ信号,抑制转移相关蛋白的表达与分泌。同时,CD40L能够激活机体抗肿瘤免疫反应、抑制肿瘤细胞增殖和促进肿瘤细胞凋亡。协同发挥其在改善肿瘤免疫微环境和激活机体抗肿瘤免疫反应中的作用,更加长效地发挥溶瘤病毒的作用。
2、本发明将TGFβ天然抑制分子decorin和CD40L联合应用于肿瘤的免疫基因治疗,可有效结合溶瘤治疗、基因治疗和免疫治疗的优势,有望协同发挥其在改善肿瘤免疫微环境和激活机体抗肿瘤免疫反应中的作用,为结直肠癌的治疗提供一种更加有效的策略,具有十分重要的理论意义和现实价值。
附图说明
图1为溶瘤腺病毒rAd.DCN.CD40L以及对照病毒rAd.Null、rAd.DCN、rAd.CD40L和Ad.Null的基因组结构示意图。
图2为溶瘤腺病毒rAd.DCN.CD40L对结直肠癌细胞系RKO、HCT116和CT26的杀伤作用图。
图3为溶瘤腺病毒rAd.DCN.CD40L介导目的基因DCN和CD40L表达的能力图。
图4为溶瘤腺病毒rAd.DCN.CD40L治疗CT26移植瘤的治疗效果图。
图5为溶瘤腺病毒rAd.DCN.CD40L治疗7天后外周血中Tregs细胞的检测结果图。
图6为溶瘤腺病毒rAd.DCN.CD40L治疗14和25天后外周血中效应T淋巴细胞的检测结果图。
图7为溶瘤腺病毒rAd.DCN.CD40L治疗14天后外周血中记忆性T淋巴细胞的检测结果图。
图8为溶瘤腺病毒rAd.DCN.CD40L感染CT26细胞后decorin靶基因表达的检测结果图。
具体实施方式
为了使本技术领域的人员更好的理解本发明方案,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整的描述,并且下面对本发明涉及技术术语及现有研究成果做进一步的说明,若无特殊指明,按照本领域通用的一般所属进行理解和解释。
转化生长因子β(Transforming growth factorβ,TGFβ)
TGFβ作为多功能的细胞因子,在肿瘤骨转移的发生、发展过程中起着重要作用。TGF-β可以通过多种机制影响肿瘤的发生、发展和转移:如TGFβ通过PI3K/Akt/mTOR通路上调缺氧诱导因子(Hypoxia-Inducible Factors,HIFs)表达,促进肿瘤生长;通过Scr/Fak/Akt通路上调VEGF表达,促进血管生成;通过诱导溶骨相关因子的表达(IL-11,PTHrP、CTGF),促进肿瘤骨转移的发生和发展;通过增强骨髓来源抑制细胞(myeloid-derivedsuppressor cells,MDSCs)聚集、诱导CD4+Foxp3+调节性T细胞(Regulatory T cells,Tregs);下调NK细胞和CD8+T细胞表面NKG2D受体等来诱导免疫耐受微环境。目前,已有多种TGFβ靶向治疗策略应用于治疗晚期肿瘤的临床研究,如Fresolimumab(GC-1008)、PF-03446962、LY2157299(Galunisertib)等,其虽可改善肿瘤患者生活质量,并抑制肿瘤生长,但对提高长期存活率的作用有限。
核心蛋白多糖(Decorin)
Decorin作为TGFβ信号的天然抑制分子,可调控与肿瘤生长、转移密切相关的多条信号通路,如Wnt/β-catenin、Met、VEGFA等,进而抑制肿瘤的进展;进一步,decorin可降解肿瘤组织ECM,促进肿瘤局部溶瘤病毒的扩散和免疫细胞的浸润,更有效地发挥溶瘤病毒的溶瘤作用和免疫激活效应。多种免疫治疗手段联合应用已经成为免疫治疗的趋势和方向。近期研究显示,将靶向TGFβ策略与抑制免疫检查点策略联合应用,可在动物水平发挥协同效应。除抑制免疫检查点的策略外,另一类针对共刺激信号的激活性抗体药物发展迅速。
CD40及其配体CD40L
CD40-CD40L共刺激信号是研究的热点,其能刺激T淋巴细胞扩增并产生IL-12,进一步激活CTLs并发挥抗肿瘤免疫反应。目前,已有多种靶向CD40-CD40L信号的药物获批进行临床试验:如,重组可溶性CD40L蛋白(rsCD40L)、表达CD40L的溶瘤病毒、CD40激活性抗体等。临床研究结果显示,其具有激活机体抗肿瘤免疫反应、抑制肿瘤细胞增殖和促进肿瘤细胞凋亡等作用,但其单独使用疗效无法达到预期,可能与肿瘤微环境的免疫抑制状态相关。而联合靶向免疫抑制信号的治疗策略,有望为CD40靶向治疗带来新的突破。研究表明,抑制TGFβ信号可促进CD40L介导的DCs激活,增强DCs的抗肿瘤活性。
在本发明的一个具体实施方式中,采用stratagene公司的Adeasy系统,将“端粒酶启动子TERTp调控E1A的表达框,E1B启动子调控CD40L和E1B-55KDa的表达框,及cmv启动子调控decorin的表达框”构建到穿梭质粒。使用限制性内切酶PmeI将其线性化,并于BJ5183菌株中与Adeasy-1同源重组。得到的重组腺病毒质粒,经限制性内切酶PacI线性化后,转染HEK293细胞,包装得到溶瘤腺病毒。并在人结直肠癌细胞、小鼠结直肠癌细胞中鉴定目的基因decorin和CD40L的表达;在体外证实了溶瘤腺病毒的溶瘤作用;在小鼠CT26移植瘤模型中明确其治疗效果和机制。
在进一步优选的实施方式中,本发明采用的方法具体为:
1、溶瘤腺病毒rAd.DCN.CD40L的构建及制备
构建由端粒酶启动子TERTp启动腺病毒复制必需基因E1A表达,由E1B启动子启动CD40L和E1B55K表达的中间载体TE-TP-E1A-CD40L;并通过酶切、连接的方法获得功能序列,并克隆到携带DCN基因的穿梭质粒上;最后,采用Adeasy系统制备重组腺病毒载体pAd.DCN.CD40L。于HEK293细胞中包装获得重组腺病毒。
此外在更优选的具体实施方式中,为了进行功能和机制研究,还制备了四种对照病毒:(1)rAd.Null,具有溶瘤功能,不携带目的基因的对照病毒;(2)rAd.DCN,携带DCN基因的溶瘤腺病毒;(3)rAd.CD40L,携带CD40L基因的溶瘤腺病毒(4)Ad.Null,不携带目的基因的复制缺陷性溶瘤腺病毒。
2、溶瘤腺病毒介导的目的基因表达和溶瘤功能评价
目的基因的有效表达是免疫功能得以发挥的保障。将重组腺病毒感染结直肠癌细胞后32h,荧光定量分别检测DCN和CD40L的表达水平。
而溶瘤功能是溶瘤腺病毒的基本特征。在更优选的具体实施方式中,我们采用SRB染色法检测了溶瘤腺病毒对多种结直肠癌细胞的溶瘤作用。
3、溶瘤腺病毒体内抗肿瘤效应评价
为评价小鼠体内抗肿瘤效应,建立了CT26细胞的小鼠移植瘤模型,通过瘤内给药方式进行治疗后,观察溶瘤腺病毒对移植瘤生长的抑制作用,明确其治疗效果。
4、溶瘤腺病毒体内外抗肿瘤机制研究
为明确溶瘤病毒的体内外抗肿瘤机制,检测了小鼠外周血免疫细胞表型,体外在CT26细胞感染rAd.DCN.CD40L后检测decorin靶基因的表达,初步阐明了其作用机制。
本发明的创新点在于以溶瘤腺病毒为载体,联合靶向TGFβ和靶向CD40-CD40L的治疗策略,协同发挥其抗肿瘤免疫激活效应,提升结直肠癌的治疗水平。
肿瘤局部给药后,首先通过溶瘤作用杀灭肿瘤细胞;同时不断复制的病毒能够持续产生大量的目的蛋白decorin和CD40L。局部高浓度的decorin,可阻断肿瘤细胞内异常激活的TGFβ信号,抑制转移相关蛋白的表达与分泌。同时,CD40L能够激活机体抗肿瘤免疫反应、抑制肿瘤细胞增殖和促进肿瘤细胞凋亡。协同发挥其在改善肿瘤免疫微环境和激活机体抗肿瘤免疫反应中的作用,更加长效地发挥溶瘤病毒的作用。
下面将结合实施例对本发明的实施方案进行详细描述,但是本领域技术人员将会理解,下列实施例仅用于说明本发明,而不应视为限制本发明的范围。实施例中未注明具体条件者,按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者,均为可以通过市购买获得的常规产品。
实施例1重组腺病毒rAd.DCN.CD40L的构建与制备
其方法是基因合成DCN基因(核心蛋白多糖基因)和CD40L基因,将DCN插入到pshuttle-cmv载体中,获得pShuttle-cmv-DCN(pSh.cmv.DCN);将端粒酶启动子TERTp、腺病毒E1A基因、天然E1B启动子、CD40L基因、核糖体内部进入位点(IRES)及E1B55K顺次相连,克隆到TE载体上获得TE-TP-E1A-CD40L,使用限制性内切酶MfeI酶切TE-TP-E1A-CD40L,获取复制相关基因,将其克隆到pSh.cmv.DCN的相应位点,获得穿梭质粒pSh.cmv.DCN.CD40L.RE;参照Adeasy系统,获得重组腺病毒质粒pAd.DCN.CD40L.RE;并于HEK293细胞制备获得溶瘤腺病毒rAd.DCN.CD40L。具体为:
(1)pSh.cmv.DCN的构建
通过基因合成技术,合成DCN基因的全序列(如表1所示),并在上下游分别加入SalI和XhoI的酶切位点,使用上述两种限制性内切酶将其酶切后,连接到pShuttle-cmv的相应位点,获得pSh.cmv.DCN载体。
(2)TE-TP-E1A-CD40L的构建
通过基因合成技术,合成CD40L基因的全序列(如表1所示),并将端粒酶启动子TERTp、腺病毒E1A基因、天然E1B启动子、CD40L基因、核糖体内部进入位点(IRES)及E1B55K顺次相连,克隆到TE载体上获得TE-TP-E1A-CD40L。
表1 DCN和CD40L基因序列信息
(3)pSh.cmv.DCN.CD40L.RE的构建
质粒TE-TP-E1A含有TERTp启动子启动E1A表达和E1B启动子调控CD40L和E1B55K表达的两个表达框,通过MfeI酶切,获得此部分序列,然后将其正向克隆到pSh.cmv.DCN的相应位点,获得穿梭质粒pSh.cmv.DCN.CD40L.RE。
(4)溶瘤腺病毒rAd.DCN.CD40L的制备
参照Adeasy系统制备重组腺病毒质粒:PmeI酶切穿梭质粒pSh.cmv.DCN.CD40L.RE,电转BJ5183感受态细胞,与Adeasy-1同源重组获得重组腺病毒质粒pAd.DCN.CD40L.RE。PacI酶切重组腺病毒质粒,并将其转染HEK293细胞,制备获得溶瘤腺病毒rAd.DCN.CD40L(如图1所示)。通过测序鉴定正确后,进行扩增、纯化和滴度测定;结果显示,病毒滴度和纯度均符合要求(如表2所示)。
(5)对照病毒的构建和制备
按照溶瘤腺病毒rAd.DCN.CD40L构建、制备流程,采用pShuttle-cmv替换pSh.cmv.DCN,用TE-TP-E1A替换TE-TP-E1A-CD40L,构建和制备不携带目的基因的溶瘤腺病毒rAd.Null、rAd.DCN、rAd.CD40L。同时,采用Adeasy系统,制备复制缺陷型对照病毒Ad.Null。四种对照病毒经测序鉴定正确后,进行扩增、纯化和滴度测定;结果显示,病毒滴度和纯度均符合要求(如表2所示)。
表2病毒滴度、纯度检测结果
实施例2溶瘤腺病毒rAd.DCN.CD40L体外功能验证
其方法是,在结直肠癌细胞中,采用磺酰罗丹明B(Sulforhodamine B,SRB)染色法,检测溶瘤病毒的杀伤效应;通过荧光定量检测目的基因DCN和CD40L在结直肠癌细胞中的表达。具体为:
(1)溶瘤腺病毒rAd.DCN.CD40L的杀伤能力检测
将人结直肠癌癌细胞系RKO、HCT116和小鼠结直肠癌细胞系CT26分别以1×103细胞/孔接种96孔板。第二天,溶瘤腺病毒rAd.DCN.CD40L和对照病毒rAd.Null、rAd.DCN、rAd.CD40L和Ad.Null分别以5倍梯度稀释的方式感染细胞(1.25×106Vps/细胞-80Vps/细胞)。第七天(感染后第六天),采用SRB染色检测每孔中细胞的存活率,明确溶瘤腺病毒的细胞杀伤作用。计算方法为:细胞存活率=相应感染滴度下的OD值/对照孔的OD值。结果显示,溶瘤病毒rAd.DCN.CD40L和rAd.Null、rAd.DCN、rAd.CD40L不但能够有效地杀伤人结直肠癌细胞RKO和HCT116,还能杀伤小鼠结直肠癌细胞CT26(如图2所示)。
(2)溶瘤腺病毒rAd.DCN.CD40L介导目的基因DCN和CD40L表达的检测
采用10000VPs/细胞的溶瘤病毒rAd.DCN.CD40L和对照病毒感染结直肠癌细胞RKO、HCT116和CT26以后6h,将细胞培养基替换为无血清培养基。继续培养至32h,收集细胞,采用荧光定量分别检测目的基因DCN和CD40L的表达。结果显示,溶瘤腺病毒rAd.DCN.CD40L和rAd.DCN均能在结直肠癌细胞中高效地表达目的基因DCN,溶瘤腺病毒rAd.DCN.CD40L和rAd.CD40L均能在结直肠癌细胞中高效地表达目的基因CD40L(如图3所示)。
实施例3溶瘤腺病毒rAd.DCN.CD40L治疗小鼠结直肠癌移植瘤的疗效评价
其方法是,采用小鼠结直肠癌细胞CT26建立移植瘤模型,通过瘤内给予溶瘤病毒的方式进行治疗,通过对其生长情况的监测,评价溶瘤病毒对小鼠结直肠癌移植瘤的治疗作用。具体为:
小鼠结直肠癌细胞单细胞悬液以2×106细胞/小鼠,皮下荷瘤6-8周的Babl/c小鼠,观察肿瘤的生长情况,于荷瘤后7d,检测肿瘤的体积,并按照体积分层随机分组划分为Buffer组、rAd.Null组、rAd.DCN、rAd.CD40L和rAd.DCN.CD40L组。按照2.5×1010VPs/100μl的剂量,瘤内注射重组腺病毒进行治疗。治疗后,观察小鼠的健康状况、肿瘤的生长体积。待Buffer组肿瘤出现破溃(或者体积大于2000mm3)时,终止实验。处死小鼠后,取肿瘤组织进行HE染色。结果显示,rAd.DCN.CD40L和rAd.DCN、rAd.CD40L均可以有效地抑制CT26细胞移植瘤的生长(如图4所示)。
实施例4溶瘤腺病毒rAd.DCN.CD40L治疗小鼠结直肠癌移植瘤的机制研究
其方法是通过血液中T淋巴细胞亚型的分析,明确rAd.DCN.CD40L对于免疫的调节作用。具体为:
免疫调节是TGF-β介导肿瘤免疫逃逸的重要途径,因此,rAd.DCN.CD40L能否通过打破TGF-β介导的免疫抑制,是rAd.DCN.CD40L治疗取得成功的关键。治疗后7d、14d和25天,我们分别通过检测血液中Tregs的比例、效应T淋巴细胞和记忆性T淋巴细胞、骨髓来源抑制细胞(Bone marrow derived suppressor cells,MDSCs)的比例等,来明确rAd.DCN.CD40L对小鼠免疫的调节作用。我们的结果显示,与rAd.Null治疗相比,rAd.DCN.CD40L显著下调小鼠外周血中Tregs细胞的比例,可以提升效应T淋巴细胞和记忆性T淋巴细胞的比例。另外,rAd.DCN.CD40L可介导CT26细胞中转移相关的decorin靶基因c-met和β-catenin的表达下调。与rAd.DCN和rAd.CD40L相比,rAd.DCN.CD40L对免疫细胞和靶基因的调控能力显著增强(如图5-8所示)。
综上所述,本发明成功构建了由端粒酶启动子调控溶瘤(TERTp启动E1A表达,E1B启动CD40L表达)、表达DCN蛋白的溶瘤腺病毒rAd.DCN.CD40L。研究结果证实,该溶瘤腺病毒能够在体外结直肠癌细胞系中杀伤结直肠癌细胞,能够介导DCN和CD40L在结直肠癌细胞中的高效表达。在小鼠结直肠癌细胞CT26的移植瘤模型中,rAd.DCN.CD40L能够有效地抑制肿瘤的生长和进展;同时,明确了rAd.DCN.CD40L可在肿瘤局部通过调节骨转移相关的TGF-β靶基因、免疫细胞的比例等来抑制肿瘤转移的发生和发展。此外,明确了DCN和CD40L在机体抗肿瘤免疫激活中具有一定的协同效应。
因此,该溶瘤腺病毒不但可以通过溶瘤作用实现局部肿瘤的抑制和清除作用,还能够通过抑制转移相关基因以及调节免疫等方式,抑制肿瘤的转移。
以上所述的实施方式,并不构成对该技术方案保护范围的限定。任何在上述实施方式的精神和原则之内所作的修改、等同替换和改进等,均应包含在该技术方案的保护范围之内。
Claims (10)
1.一种多基因融合溶瘤腺病毒,其特征在于,该溶瘤腺病毒以Adeasy载体系统为基础,插入DCN基因表达框、腺病毒复制调控基因序列及CD40L基因表达框。
2.根据权利要求1所述的一种多基因融合溶瘤腺病毒,其特征在于,所述DCN基因表达框、腺病毒复制调控基因序列及CD40L基因表达框均插入在腺病毒基因组E1区中。
3.根据权利要求1所述的一种多基因融合溶瘤腺病毒,其特征在于,所述DCN基因表达框由cmv启动子和DCN基因组成。
4.根据权利要求3所述的一种多基因融合溶瘤腺病毒,其特征在于,所述CD40L基因表达框由天然E1B启动子和CD40L基因组成。
5.根据权利要求4所述的一种多基因融合溶瘤腺病毒,其特征在于,所述腺病毒复制调控基因序列包括端粒酶启动子TERTp、腺病毒E1区复制起始基因E1A及E1B55K,其中所述的腺病毒E1A基因由端粒酶启动子TERTp调控,所述E1B55K由天然E1B启动子调控。
6.根据权利要求5所述的一种多基因融合溶瘤腺病毒,其特征在于,所述CD40L基因插入至天然E1B启动子和E1B55K之间,即天然E1B启动子同时调控CD40L基因和E1B55K基因。
7.根据权利要求5所述的一种多基因融合溶瘤腺病毒,其特征在于:从序列的5’至3’方向为:cmv启动子-DCN基因-TERTp-腺病毒E1A基因-天然E1B启动子-CD40L基因-IRES-E1B55K。
8.一种如权利要求1-7任一项所述的多基因融合溶瘤腺病毒的构建方法,其特征在于,包括以下步骤:
S1:将DCN基因插入到pshuttle-cmv载体中,获得pSh.cmv.DCN;
S2:将端粒酶启动子TERTp、腺病毒E1A基因、天然E1B启动子、CD40L基因、核糖体内部进入位点及E1B55K顺次相连,克隆到TE载体上获得TE-TP-E1A-CD40L,酶切TE-TP-E1A-CD40L后获取复制相关基因,将所述复制相关基因克隆到pSh.cmv.DCN的相应位点,获得穿梭质粒;
S3:酶切穿梭质粒,电转感受态细胞,与Adeasy-1同源重组获得重组腺病毒质粒;酶切重组腺病毒质粒后转染HEK293细胞,获得溶瘤腺病毒。
9.一种如权利要求1-7任意一项所述多基因融合溶瘤腺病毒在制备用于治疗结直肠癌的药物中的应用。
10.一种如权利要求1-7任意一项所述多基因融合溶瘤腺病毒在肿瘤治疗及药物研发中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111010563.5A CN113699122B (zh) | 2021-08-31 | 2021-08-31 | 一种多基因融合溶瘤腺病毒及其构建方法和应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111010563.5A CN113699122B (zh) | 2021-08-31 | 2021-08-31 | 一种多基因融合溶瘤腺病毒及其构建方法和应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113699122A true CN113699122A (zh) | 2021-11-26 |
CN113699122B CN113699122B (zh) | 2023-10-20 |
Family
ID=78657825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111010563.5A Active CN113699122B (zh) | 2021-08-31 | 2021-08-31 | 一种多基因融合溶瘤腺病毒及其构建方法和应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113699122B (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115252576A (zh) * | 2022-08-01 | 2022-11-01 | 沈阳药科大学 | 基于工程化细菌外膜囊泡的溶瘤病毒静脉递送系统及其构建方法和应用 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103221423A (zh) * | 2010-09-24 | 2013-07-24 | 昂克斯治疗有限公司 | 溶瘤腺病毒载体及与其相关的方法和用途 |
CN106520708A (zh) * | 2016-11-04 | 2017-03-22 | 中国人民解放军军事医学科学院放射与辐射医学研究所 | 一种TGF‑β靶向的溶瘤腺病毒在肾癌治疗中的应用 |
CN106755103A (zh) * | 2016-12-26 | 2017-05-31 | 中国人民解放军军事医学科学院放射与辐射医学研究所 | 溶瘤腺病毒,用于制备该腺病毒的载体及其应用 |
CN112118864A (zh) * | 2018-03-21 | 2020-12-22 | 瓦洛治疗公司 | 经修饰的溶瘤腺病毒 |
CN112601547A (zh) * | 2018-06-21 | 2021-04-02 | 雷普利穆内有限公司 | 使用溶瘤病毒的治疗 |
-
2021
- 2021-08-31 CN CN202111010563.5A patent/CN113699122B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103221423A (zh) * | 2010-09-24 | 2013-07-24 | 昂克斯治疗有限公司 | 溶瘤腺病毒载体及与其相关的方法和用途 |
CN106520708A (zh) * | 2016-11-04 | 2017-03-22 | 中国人民解放军军事医学科学院放射与辐射医学研究所 | 一种TGF‑β靶向的溶瘤腺病毒在肾癌治疗中的应用 |
CN106755103A (zh) * | 2016-12-26 | 2017-05-31 | 中国人民解放军军事医学科学院放射与辐射医学研究所 | 溶瘤腺病毒,用于制备该腺病毒的载体及其应用 |
CN112118864A (zh) * | 2018-03-21 | 2020-12-22 | 瓦洛治疗公司 | 经修饰的溶瘤腺病毒 |
CN112601547A (zh) * | 2018-06-21 | 2021-04-02 | 雷普利穆内有限公司 | 使用溶瘤病毒的治疗 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115252576A (zh) * | 2022-08-01 | 2022-11-01 | 沈阳药科大学 | 基于工程化细菌外膜囊泡的溶瘤病毒静脉递送系统及其构建方法和应用 |
CN115252576B (zh) * | 2022-08-01 | 2024-04-02 | 沈阳药科大学 | 基于工程化细菌外膜囊泡的溶瘤病毒静脉递送系统及其构建方法和应用 |
Also Published As
Publication number | Publication date |
---|---|
CN113699122B (zh) | 2023-10-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110128550B (zh) | 一种新型的同时阻断免疫检查点pd-l1和tigit的复制型溶瘤腺病毒和应用 | |
CN109576231B (zh) | 分离的重组溶瘤腺病毒、药物组合物及其在治疗肿瘤和/或癌症的药物中的用途 | |
JP7564572B2 (ja) | 単離された組換え体腫瘍溶解性ワクシニアウイルスとnk細胞を含む治療薬、その使用およびそれを適用したキット | |
US20090053186A1 (en) | Therapy for primary and metastatic cancers | |
CN103614416A (zh) | 一种携带人穿膜肽p53与GM-CSF基因的重组溶瘤腺病毒及其用途 | |
JP7420751B2 (ja) | I型インターフェロン及びcd40-配位子を用いる腫瘍溶解性ウイルス又は抗原提示細胞媒介性癌治療 | |
CN110650745A (zh) | 武装复制型溶瘤腺病毒 | |
CA3124877A1 (en) | Oncolytic virus expressing interferon and application thereof | |
CN111606999B (zh) | 兼具激活免疫共刺激信号通路和阻断免疫检查点的复制型溶瘤腺病毒及其应用 | |
CN113699122B (zh) | 一种多基因融合溶瘤腺病毒及其构建方法和应用 | |
US20220235332A1 (en) | Fast and Accurate Three-Plasmid Oncolytic Adenovirus Recombinant Packaging System AD5MIXPLUS and Application Thereof | |
CN1328372C (zh) | 肿瘤靶向基因-病毒zd55-il-24及其构建方法和应用 | |
CN111500632B (zh) | 表达st13和trail的溶瘤腺病毒构建及其应用 | |
CN115873809A (zh) | 一种多基因融合溶瘤腺病毒的构建方法及其应用 | |
WO2020166727A1 (ja) | ヒト35型アデノウイルスを基板とした腫瘍溶解性ウイルス | |
CN116590242A (zh) | 一种重组溶瘤腺病毒及其应用 | |
CN118325852A (zh) | 一种共表达p53和IL-7的重组腺病毒及其应用 | |
Rohmer et al. | 458. Deletion of the E1B19K Gene of Oncolytic Adenoviruses Does Not Interfere with the Expression of Transgenes, but Decreases Lytic Activity in Some Tumor Cells |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |