CN105943548A - 一种视网膜变性模型及其药物筛选方法 - Google Patents
一种视网膜变性模型及其药物筛选方法 Download PDFInfo
- Publication number
- CN105943548A CN105943548A CN201610394919.2A CN201610394919A CN105943548A CN 105943548 A CN105943548 A CN 105943548A CN 201610394919 A CN201610394919 A CN 201610394919A CN 105943548 A CN105943548 A CN 105943548A
- Authority
- CN
- China
- Prior art keywords
- virus
- retinal degeneration
- model
- mir
- antisense mir
- 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
- 201000007737 Retinal degeneration Diseases 0.000 title claims abstract description 30
- 230000004258 retinal degeneration Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 14
- 238000007877 drug screening Methods 0.000 title abstract description 6
- 241000700605 Viruses Species 0.000 claims abstract description 29
- 108091092825 miR-24 stem-loop Proteins 0.000 claims abstract description 23
- 108091032978 miR-24-3 stem-loop Proteins 0.000 claims abstract description 23
- 108091064025 miR-24-4 stem-loop Proteins 0.000 claims abstract description 23
- 230000000692 anti-sense effect Effects 0.000 claims abstract description 21
- 241000713666 Lentivirus Species 0.000 claims abstract description 13
- 230000001404 mediated effect Effects 0.000 claims abstract description 13
- 241001465754 Metazoa Species 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 28
- 239000003814 drug Substances 0.000 claims description 8
- 241000282693 Cercopithecidae Species 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 4
- 230000006378 damage Effects 0.000 claims description 3
- 206010016654 Fibrosis Diseases 0.000 claims 2
- 229940000406 drug candidate Drugs 0.000 claims 2
- 230000004761 fibrosis Effects 0.000 claims 2
- 208000027418 Wounds and injury Diseases 0.000 claims 1
- 208000014674 injury Diseases 0.000 claims 1
- 108090000623 proteins and genes Proteins 0.000 abstract description 17
- 230000002207 retinal effect Effects 0.000 abstract description 10
- 239000012528 membrane Substances 0.000 abstract description 6
- 206010064930 age-related macular degeneration Diseases 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 108091070501 miRNA Proteins 0.000 abstract description 4
- 239000002679 microRNA Substances 0.000 abstract description 4
- 230000007850 degeneration Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 241000700159 Rattus Species 0.000 description 22
- 210000000844 retinal pigment epithelial cell Anatomy 0.000 description 13
- 102000004169 proteins and genes Human genes 0.000 description 10
- 241000282567 Macaca fascicularis Species 0.000 description 9
- 210000005252 bulbus oculi Anatomy 0.000 description 9
- 238000010166 immunofluorescence Methods 0.000 description 9
- 101000729271 Homo sapiens Retinoid isomerohydrolase Proteins 0.000 description 7
- 102100031176 Retinoid isomerohydrolase Human genes 0.000 description 7
- 238000001514 detection method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 210000001508 eye Anatomy 0.000 description 6
- 108091032973 (ribonucleotides)n+m Proteins 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 210000000608 photoreceptor cell Anatomy 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 229940079593 drug Drugs 0.000 description 4
- 230000007831 electrophysiology Effects 0.000 description 4
- 238000002001 electrophysiology Methods 0.000 description 4
- 208000002780 macular degeneration Diseases 0.000 description 4
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 description 4
- 238000003753 real-time PCR Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 210000001525 retina Anatomy 0.000 description 4
- 238000010839 reverse transcription Methods 0.000 description 4
- 229940032753 sodium iodate Drugs 0.000 description 4
- 235000015281 sodium iodate Nutrition 0.000 description 4
- 239000011697 sodium iodate Substances 0.000 description 4
- 102000018704 Chitinase-3-Like Protein 1 Human genes 0.000 description 3
- 108010066813 Chitinase-3-Like Protein 1 Proteins 0.000 description 3
- 102100034343 Integrase Human genes 0.000 description 3
- 241000283973 Oryctolagus cuniculus Species 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 108010092799 RNA-directed DNA polymerase Proteins 0.000 description 3
- 239000002299 complementary DNA Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000003550 marker Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 210000003733 optic disk Anatomy 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000000638 stimulation Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 101150115180 CHI3L1 gene Proteins 0.000 description 2
- 101100298998 Caenorhabditis elegans pbs-3 gene Proteins 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000002965 ELISA Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 206010064571 Gene mutation Diseases 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 102000010175 Opsin Human genes 0.000 description 2
- 108050001704 Opsin Proteins 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- 102000018210 Recoverin Human genes 0.000 description 2
- 108010076570 Recoverin Proteins 0.000 description 2
- 206010057430 Retinal injury Diseases 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 2
- 229930006000 Sucrose Natural products 0.000 description 2
- 108091053398 TRIM/RBCC family Proteins 0.000 description 2
- 102000011408 Tripartite Motif Proteins Human genes 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000006907 apoptotic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010367 cloning Methods 0.000 description 2
- 210000004087 cornea Anatomy 0.000 description 2
- MHMNJMPURVTYEJ-UHFFFAOYSA-N fluorescein-5-isothiocyanate Chemical compound O1C(=O)C2=CC(N=C=S)=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 MHMNJMPURVTYEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000006166 lysate Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000001328 optic nerve Anatomy 0.000 description 2
- 229920002866 paraformaldehyde Polymers 0.000 description 2
- 230000008506 pathogenesis Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000000770 proinflammatory effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000020183 skimmed milk Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005720 sucrose Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- NCYCYZXNIZJOKI-IOUUIBBYSA-N 11-cis-retinal Chemical compound O=C/C=C(\C)/C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C NCYCYZXNIZJOKI-IOUUIBBYSA-N 0.000 description 1
- FWBHETKCLVMNFS-UHFFFAOYSA-N 4',6-Diamino-2-phenylindol Chemical compound C1=CC(C(=N)N)=CC=C1C1=CC2=CC=C(C(N)=N)C=C2N1 FWBHETKCLVMNFS-UHFFFAOYSA-N 0.000 description 1
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 238000008157 ELISA kit Methods 0.000 description 1
- 102100039289 Glial fibrillary acidic protein Human genes 0.000 description 1
- 101710193519 Glial fibrillary acidic protein Proteins 0.000 description 1
- 206010018341 Gliosis Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000282560 Macaca mulatta Species 0.000 description 1
- 101150082854 Mertk gene Proteins 0.000 description 1
- 101100167135 Mus musculus Chil3 gene Proteins 0.000 description 1
- 208000006550 Mydriasis Diseases 0.000 description 1
- 238000012408 PCR amplification Methods 0.000 description 1
- QGMRQYFBGABWDR-UHFFFAOYSA-M Pentobarbital sodium Chemical compound [Na+].CCCC(C)C1(CC)C(=O)NC(=O)[N-]C1=O QGMRQYFBGABWDR-UHFFFAOYSA-M 0.000 description 1
- 102100040756 Rhodopsin Human genes 0.000 description 1
- 108090000820 Rhodopsin Proteins 0.000 description 1
- BGDKAVGWHJFAGW-UHFFFAOYSA-N Tropicamide Chemical compound C=1C=CC=CC=1C(CO)C(=O)N(CC)CC1=CC=NC=C1 BGDKAVGWHJFAGW-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 238000010171 animal model Methods 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 230000030833 cell death Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000009089 cytolysis Effects 0.000 description 1
- 230000004300 dark adaptation Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- UQLDLKMNUJERMK-UHFFFAOYSA-L di(octadecanoyloxy)lead Chemical compound [Pb+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O UQLDLKMNUJERMK-UHFFFAOYSA-L 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000012154 double-distilled water Substances 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 210000000744 eyelid Anatomy 0.000 description 1
- 238000001415 gene therapy Methods 0.000 description 1
- 210000005046 glial fibrillary acidic protein Anatomy 0.000 description 1
- 230000007387 gliosis Effects 0.000 description 1
- 238000003125 immunofluorescent labeling Methods 0.000 description 1
- 239000007928 intraperitoneal injection Substances 0.000 description 1
- 210000005240 left ventricle Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 108020004999 messenger RNA Proteins 0.000 description 1
- 239000013642 negative control Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- CMHHMUWAYWTMGS-UHFFFAOYSA-N oxybuprocaine Chemical compound CCCCOC1=CC(C(=O)OCCN(CC)CC)=CC=C1N CMHHMUWAYWTMGS-UHFFFAOYSA-N 0.000 description 1
- 229960003502 oxybuprocaine Drugs 0.000 description 1
- 230000000242 pagocytic effect Effects 0.000 description 1
- 229960002275 pentobarbital sodium Drugs 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000861 pro-apoptotic effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000011552 rat model Methods 0.000 description 1
- 230000004243 retinal function Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000003161 ribonuclease inhibitor Substances 0.000 description 1
- 210000003786 sclera Anatomy 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000002415 sodium dodecyl sulfate polyacrylamide gel electrophoresis Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002691 topical anesthesia Methods 0.000 description 1
- 238000002054 transplantation Methods 0.000 description 1
- 229960004791 tropicamide Drugs 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- 230000004382 visual function Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000001262 western blot Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7088—Compounds having three or more nucleosides or nucleotides
- A61K31/7105—Natural ribonucleic acids, i.e. containing only riboses attached to adenine, guanine, cytosine or uracil and having 3'-5' phosphodiester links
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/027—New or modified breeds of vertebrates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K49/00—Preparations for testing in vivo
- A61K49/0004—Screening or testing of compounds for diagnosis of disorders, assessment of conditions, e.g. renal clearance, gastric emptying, testing for diabetes, allergy, rheuma, pancreas functions
- A61K49/0008—Screening agents using (non-human) animal models or transgenic animal models or chimeric hosts, e.g. Alzheimer disease animal model, transgenic model for heart failure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Chemical & Material Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Rheumatology (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Diabetes (AREA)
- Endocrinology (AREA)
- Gastroenterology & Hepatology (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Toxicology (AREA)
- Urology & Nephrology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biochemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明涉及一种视网膜变性模型,用慢病毒介导的反义mir‑24的病毒进行模型动物视网膜下腔注射。与现有技术相比,本发明首次采用慢病毒介导的反义mir‑24的病毒进行模型动物视网膜下腔注射,建立视网膜变性模型,选择性破坏RPE细胞,引起继发性视网膜膜变性,具有视网膜变性的病例特征。本发明提供的这种模型可用于研究视网膜变性的机制和药物筛选。本发明模型是封闭一个RPE细胞重要的一个miRNA‑‑‑mir‑24,根据miRNA的作用机制(一个miRNA作用多个靶基因),更能模拟特发性AMD发病的特征。
Description
技术领域
本发明涉及一种动物模型,尤其是涉及一种视网膜变性模型及其药物筛选方法。
背景技术
目前视网膜变性的模型分为遗传性和化学性两种,化学性模型的一种典型模型是利用碘酸钠诱导,对于碘酸钠诱导的记性视网膜变性模型由于病程非常急,碘酸钠作为一个强氧化剂,虽然破坏了视网膜色素上皮细胞(RPE),同时也破坏光感受器细胞,因此虽然有相关碘酸钠诱导猴子视网膜变性模型的报道(比如中国专利CN 102198278 A即公开了一种恒河猴视网膜变性模型及其药物筛选方法),但是其重复性较差,很难重复出来。对于遗传性模型,有单基因突变导致的遗传性年龄相关性黄斑变性(AMD)大鼠模型(RCS大鼠),由于Mertk基因突变因其RPE细胞吞噬功能减退,引起继发性视网膜变性。
发明内容
本发明的目的就是为了克服上述现有技术存在的缺陷而提供一种能够模拟特发性AMD发病特征的视网膜变性模型及其药物筛选方法。
本发明的目的可以通过以下技术方案来实现:
一种视网膜变性模型,用慢病毒介导的反义mir-24的病毒进行模型动物视网膜下腔注射。
所述的慢病毒介导的反义mir-24的病毒具体是指将反义miR-24序列克隆到慢病毒载体上得到的病毒,所述的miR-24碱基序列如SEQ ID NO.1所示。
所述的慢病毒介导的反义mir-24的病毒的注射剂量是3ul,病毒滴度为5-10*10^7tu/ml。
所述的模型动物包括大鼠与猴子,优选为SD大鼠或食蟹猴。
一种筛选治疗视网膜变性的药物的方法,包括如下步骤:
a、用慢病毒介导的反义mir-24的病毒进行模型动物视网膜下腔注射,建立视网膜变性模型;
b、将候选药物施用于变性模型;
c、观察候选药物对视网膜变性、损伤程度的量化指标的影响情况,并进行评分,评价潜在治疗视网膜变性的药物。
步骤a中,所述的慢病毒介导的反义mir-24的病毒的注射剂量是3ul,病毒滴度为5-10*10^7tu/ml。
所述的模型动物包括大鼠与猴子,优选为SD大鼠或食蟹猴。
与现有技术相比,本发明首次采用用慢病毒介导的反义mir-24的病毒进行模型动物视网膜下腔注射,建立视网膜变性模型,选择性破坏RPE细胞,引起继发性视网膜膜变性,具有视网膜变性的病例特征。本发明提供的这种模型可用于研究视网膜变性的机制和药物筛选。本发明模型是封闭一个RPE细胞重要的一个miRNA-mir-24,根据miRNA的作用机制(一个miRNA作用多个靶基因),更能模拟特发性AMD发病的特征。
附图说明
图1为anti-miR-24大鼠视网膜下腔注射引起的视功能降低和视网膜相关基因表达的变化,opsin、rhodopsin和recoverin为光感受器细胞的标记蛋白显著下调;bim、bax、bak等促凋亡基因未见。
图2为anti-miR-24大鼠视网膜下腔注射引起的视网膜核层变薄,Muller细胞活化。
图3为anti-miR-24大鼠视网膜下腔注射引起的促炎因子CHI3L1表达上调,RPE65表达下调,提示RPE功能减弱。
图4为ELISA检测anti-miR-24大鼠视网膜下腔注射引起的CHI3L1产生增多。
图5为anti-miR-24大鼠视网膜下腔注射视网膜引起的RPE细胞破坏,RPE65免疫荧光降低(RBCC铺片)。
图6为anti-miR-24食蟹猴视网膜下腔注射引起的渗漏(FFA和眼底照相)。
图7为食蟹猴视网膜正常的OCT检测结果;anti-miR-24食蟹猴视网膜下腔注射7周OCT检测,发现视网膜结构紊乱,RPE曾与外核层粘连。
具体实施方式
下面结合附图和具体实施例对本发明进行详细说明。
实施例1
用慢病毒介导的反义mir-24的病毒进行模型动物视网膜下腔注射,得到视网膜变性模型。
反义mir-24为的反义序列如SEQ ID NO.1所示,为CTGTTCCTGCTGAACTGAGCCA。将反义miR-24序列克隆到慢病毒载体上得到慢病毒介导的反义mir-24的病毒是本领域常规的技术手段,也可以购买,即反义mir-24病毒也是商品化的。获得病毒后,分装冻存于-80%。取正常成年SD大鼠,体重200g左右,置于体式显微镜下,并在大鼠眼球上放置凹透镜;用30gauge针头在角巩膜缘后2mm处刺一个针孔,然后用装有33gauge针头的微量注射器从针孔处进针至视网膜下腔,注入3μl(含5-10*10^7tu/ml)病毒。对侧眼视网膜下腔等体积注射等量对照病毒。在注射病毒后的2w、5w和7w进行视网膜电生理(ERG)检测。
ERG方法:APS全自动视觉电生理检查仪(APS-2000)购于重庆康华科技有限公司。做视觉电生理功能检查前一天,把DM大鼠转移到暗房,进行暗适应。第二天开始做。大鼠的准备:向大鼠腹腔注射2%戊巴比妥钠(1mL/500g体重)进行麻醉,1×速眠新(0.1ml/200g)让眼球突出,然后给予一滴0.5%托吡卡胺散瞳(Wuxi Shanhe Group,Jiangsu,China),一滴0.4%盐酸奥布卡因表面麻醉(Eisai CoLtd,Tokyo,Japan),每只眼睛各涂一点导电膏。插电极:地线接大鼠尾巴上,负极接大鼠两耳朵之间,正极接两眼睛角膜上,注意不要触到眼睑和巩膜上。打开软件“视觉电生理图”,点“FERG”,再点1,2通道,一个为左眼通道,另一个为右眼通道,点“设置”,刺激次数为2次,刺激频率为0.05Hz;依次点击刺激强度(1)―0.0006325(cd*s/m)、(5)―0.006325(cd*s/m)、(9)―0.06325(cd*s/m),每次强度至少间隔2min。点“示波”,待波的基线平稳时,点击“采集”,等听到“嘀”的一声后,采集完毕,点击“保存”。再点击“设置”,修改文档号和刺激强度,依次类推。等所有强度做完后,换下一只大鼠。所有大鼠做完后,打开“文件”,进行标定,双击曲线,曲线变为白色,点击“标定”。标定完a波后,按空格键,标定b波。所有标定完毕,点击“打印”,保存为.PDF格式。点击左下角按钮,退出软件,关闭电脑,关闭放大器。
荧光定量PCR检测:
提取RNA采用的是Trizol裂解的方法,主要步骤如下:
1.将细胞用PBS缓冲液洗1-2次,按比例加入Trizol裂解液(例如六孔板的一个孔对应1mL裂解液)。
2.细胞离壁后,转移到1.5mL的离心管,加入五分之一体积的氯仿,剧烈混匀后,以12000rpm的转速4℃离心15分钟。
3.离心后,将上清转移到新的离心管中,注意不要取到中间的蛋白层,加入等体积的异丙醇,冰浴20分钟。
4.12000rpm的转速4℃离心15分钟,弃去上清,将沉淀用75%的乙醇洗1-2次。
5.将沉淀室温干燥后,用适量的DEPC水溶解。测浓度。
RNA反转录,cDNA第一条链是通过Promega公司的M-MLV反转录酶获得的,主要步骤如下:
1.首先取1-2μg的RNA与2μL的oligo d(T)混合,72℃水浴放置5分钟,立即冰浴2分钟后,使oligo d(T)与RNA的poly-A尾巴结合,轻微离心。
2.加入1.25μL的dNTP(10μM)、1μL M-MLV反转录酶和0.5μL RNA酶抑制剂,用DEPC水将反应体积调节到25μL。42℃水浴放置1小时。
3.70℃放置10分钟使反转录酶失活。将得到的cDNA单链保存于-20℃冰箱。
引物见下表1。
表1用于检测基因的引物
| Name | forward | reverse |
| qRo-GAPDH | CCCCTTCATTGACCTCAACTACA | TCCCATTCTCAGCCTTGACTGT |
| qRo-Revn | CGGCAGGAGTTCGAAAGTATCT | TGCTGGGCGTAGGCCTTA |
| qRo-RHO | CAGAGGGCCCCAATTTTTATG | GGTAGTACTGCGGCTGCTCAA |
| qRo-OPN | GAAGGCTACATTGTCTCACT | AGAAGACGATTCCCACAG |
| qRo_bim | ATGAGACTTACACGAGGAG | ACCAGACGGAAGATGAATC |
| qRo_bak | AGAGTTCCAGACCATGCCGC | GTAGCCGAAGCCCAGAAG |
| qRo_bax | GCAAACTGGTGCTCAAGG | GGTCCCGAAGTAGGAAAGG |
| qRo_caspase3 | CTGGACTGCGGTATTGAG | GGGTGCGGTAGAGTAAGC |
反转录体系如表2:
表2反转录体系
反转录程序:16℃30分钟,42℃30分钟,85℃10分钟后立即置于冰上5分钟。然后可于-20℃冰箱保存备用。
定量PCR
将RNA反转录后得到的cDNA第一链作为模板,设计引物。利用天根公司的SYBR Green实时荧光定量PCR检测试剂盒,检测目的基因的表达量。PCR扩增条件如下:94℃变性10分钟,进入循环(95℃5sec,60℃60sec),一共40个循环,并收集溶解曲线。
结果参见图1,anti-mir-24在视网膜下腔注射第五周,发现b波波幅与对照比显著性下降,到第七周,b波下降更明显(p<0.05),提示视网膜功能下降;在注射后第七周,在mRNA水平,采用实时荧光定量PCR发现,光感受器细胞的标记物表达,opsin,rhodospin和recoverin显著下调,而促凋亡基因表达没有显著性差异,提示凋亡没有介导光感受器细胞的死亡。
在ERG检测b波出现下降(有显著性差异)的时候认为视网膜发生了变性,此时可以用这个模型用于细胞移植、基因治疗等实验性干预。
实施例2视网膜下腔注射后进行免疫荧光和核层厚度分析。
在视网膜下腔注射好注射后,通过进行免疫荧光染色进行核层厚度分析和Muller细胞胶质化标记物的检测。
免疫荧光:
组织切片的制备:DM大鼠小心摘除眼球(尽量有视神经存在),于4%多聚甲醛中固定三个小时。在解剖显微镜下,沿着角巩膜缘上方2mm处剪口,把角膜剪掉,再小心移去晶状体和虹膜。剩余的眼球放入30%的蔗糖脱水3个小时。把眼球放入组织包埋剂包埋,视神经放在一侧,注意不要有气泡,4℃冰箱平衡过夜。第二天移至-80℃冰箱备用,视神经乳头的地方做个标记。把包埋的眼球从-80℃冰箱拿出后,用冰冻切片机经过所做的标记和视神经乳头进行连续切片,切片厚度为10μm。
免疫荧光检测:视网膜切片用PBS湿润10分钟,0.25%tritonx-100透膜10分钟后,用PBS清洗3次,每次5分钟。室温下用1%BSA封闭30分钟之后,与一抗小鼠抗GS(1:200)、小鼠抗CRALBP(1:50)、兔抗Recoverin(1:500)、兔抗GMFB(1:200)、兔抗GFAP(1:200)在4℃过夜孵育(分别与小鼠抗mCherry抗体(1:1000-1:2000)共染),不加一抗组作为阴性对照。次日继续用PBS清洗3次,5分钟/次,室温下避光分别与二抗anti-mouse FITC(1:100)或anti-rabbit FITC(1:100)孵育一小时。弃除二抗后,用0.5μg/mL的DAPI孵育30秒,用PBS清洗3次,5分钟/次。用DAKO封片,加上盖玻片后于倒置荧光显微镜下观察荧光结果。
核层厚度测量:用4%多聚甲醛固定眼球,解剖并蔗糖梯度脱水,然后用OCT包埋眼杯。用冰冻切片机将眼杯通过视神经乳头切成8μm的切片。通过存活光感受器细胞的数目的统计分析视网膜的损伤,分别在鼻侧和颞侧眼球等距离设定10个点。各个点ONL和INL的厚度通过测量获得。
由图2所见,视网膜下腔注射anti-mir-24 7周后,注射侧外核层厚度明显变薄,GFAP免疫荧光显示Muller明显活化。
实施例3
Anti-mir-24视网膜下腔注射引起RPE标志蛋白的变化和mir-24的靶蛋白的变化。视网膜下腔注射anti-mir-24 7周后,体式解剖镜下分离RPE-bruch膜-脉络膜复合体,进行wetsern blot,在蛋白水平检测RPE65和Chil3表达
Western Blot方法如下
1.配制SDS-PAGE所用的凝胶,首先配制下层分离胶,配制好后,立即缓缓加入到装备好的两层玻璃板中,加入适量双蒸水封闭。
2.待下层分离胶凝固后,开始配制上层浓缩胶。将第1步中的上层水倒掉,加入浓缩胶后,慢慢将梳子插上,静置等待凝固。
3.将提取的蛋白煮沸变性后,根据蛋白浓度按照相同的样品量加入到凝胶孔内,100V的电压下,一定时间后停止电泳,采用湿转的方法,将蛋白转移到Millipore公司的PVDF膜上。
4.转膜结束后,将PVDF膜取出,用3%的脱脂奶粉或BSA将膜在室温封闭1-2小时。
5.封闭结束后,将PVDF膜从脱脂牛奶或BSA中取出,用PBST清洗2次,吸干后,加入适量配制好的一抗稀释液,室温摇匀2小时,使一抗与目的蛋白结合。所用的一抗包括:anti-RPE65(Abcam),anti-Chi3L1(Proteintech)和anti-actin(Proteintech)。
检测Chi3L1的ELISA试剂盒购自CUSABIO公司的。按照试剂盒要求进行。
如图3所示,anti-miR-24大鼠视网膜下腔注射引起的促炎因子CHI3L1表达上调,RPE65表达下调,提示RPE功能减弱。在视网膜下腔注射anti-mir-24 7周后,体式解剖镜下分离RPE-bruch膜-脉络膜复合体,抽提总蛋白,并进行ELISA,检测Chi3l1表达,如图4所示,发现Chi3l1在注射anti-mir-24组表达显著升高。
实施例4
视网膜下腔注射anti-mir-24 7周后,进行RBCC铺片,通过免疫荧光,检测RPE65的免疫反应性。视网膜铺片如下:
将大鼠用麻醉后,四肢固定,剪开胸腔,进行左心室灌注,先用PBS灌注,然后再灌注4%PFA。灌注后,取下眼球,可以泡在PBS中4℃存放,也可以马上在体视显微镜下,去除眼前节,小心取出视网膜,在载玻片上剪成6瓣,然后用加抗猝灭的封片剂封片,拍照。一旦视网膜铺片完成,进行RPE65的免疫荧光。免疫荧光同实施例2。
由图5可见:视网膜下腔注射anti-mir-24 7周后,RPE边界不清,变大,RPE65免疫荧光强度减弱,提示RPE功能减弱。
实施例5
采用上述相同方法进行anti-miR-24食蟹猴视网膜下腔注射,并考察结果。如图6所示,anti-miR-24食蟹猴视网膜下腔注射引起了渗漏(FFA和眼底照相),如图7所示,食蟹猴视网膜正常的OCT检测结果与anti-miR-24食蟹猴视网膜下腔注射7周OCT检测结果,发现视网膜结构紊乱,RPE曾与外核层粘连。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改,并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此,本发明不限于上述实施例,本领域技术人员根据本发明的揭示,不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。
Claims (7)
1.一种视网膜变性模型,其特征在于,用慢病毒介导的反义mir-24的病毒进行模型动物视网膜下腔注射。
2.根据权利要求1所述的一种视网膜变性模型,其特征在于,所述的慢病毒介导的反义mir-24的病毒具体是指将反义miR-24序列克隆到慢病毒载体上得到的病毒,所述的miR-24碱基序列如SEQ ID NO.1所示。
3.根据权利要求1所述的一种视网膜变性模型,其特征在于,所述的慢病毒介导的反义mir-24的病毒的注射剂量是3ul,病毒滴度为5-10*10^7tu/ml。
4.根据权利要求1所述的一种视网膜变性模型,其特征在于,所述的模型动物包括大鼠与猴子,优选为SD大鼠或食蟹猴。
5.一种筛选治疗视网膜变性的药物的方法,其特征在于,包括如下步骤:
a、用慢病毒介导的反义mir-24的病毒进行模型动物视网膜下腔注射,建立视网膜变性模型;
b、将候选药物施用于变性模型;
c、观察候选药物对视网膜变性、损伤程度的量化指标的影响情况,并进行评分,评价潜在治疗视网膜变性的药物。
6.根据权利要求5所述的一种筛选治疗视网膜变性的药物的方法,其特征在于,步骤a中,所述的慢病毒介导的反义mir-24的病毒的注射剂量是3ul,病毒滴度为5-10*10^7tu/ml。
7.根据权利要求5所述的一种筛选治疗视网膜变性的药物的方法,其特征在于,所述的模型动物包括大鼠与猴子,优选为SD大鼠或食蟹猴。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394919.2A CN105943548B (zh) | 2016-06-06 | 2016-06-06 | 一种视网膜变性模型及其药物筛选方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394919.2A CN105943548B (zh) | 2016-06-06 | 2016-06-06 | 一种视网膜变性模型及其药物筛选方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105943548A true CN105943548A (zh) | 2016-09-21 |
| CN105943548B CN105943548B (zh) | 2019-01-25 |
Family
ID=56908453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610394919.2A Active CN105943548B (zh) | 2016-06-06 | 2016-06-06 | 一种视网膜变性模型及其药物筛选方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105943548B (zh) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108721327A (zh) * | 2018-08-24 | 2018-11-02 | 苏州药明康德新药开发股份有限公司 | 实验动物视网膜色素变性试验模型的制备方法 |
| CN112043833A (zh) * | 2020-08-31 | 2020-12-08 | 同济大学 | 一种视网膜色素细胞rpe的自噬和凋亡的抑制剂及其应用 |
| CN113226020A (zh) * | 2018-11-14 | 2021-08-06 | 珠海岐微生物科技有限公司 | 用于眼内疾病或病症的动物模型、筛选方法和治疗方法 |
| CN113329773A (zh) * | 2018-11-14 | 2021-08-31 | 珠海岐微生物科技有限公司 | 用于眼内疾病或病症的动物模型和筛选方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198278A (zh) * | 2010-03-24 | 2011-09-28 | 四川大学华西医院 | 恒河猴视网膜变性模型及其药物筛选方法 |
| CN103223176A (zh) * | 2009-05-26 | 2013-07-31 | 中国科学院上海生命科学研究院 | miR-24及其抑制剂的应用 |
| WO2013166240A1 (en) * | 2012-05-02 | 2013-11-07 | The Board Of Regents Of The University Of Texas System | Micro-rnas involved in macular degeneration |
-
2016
- 2016-06-06 CN CN201610394919.2A patent/CN105943548B/zh active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223176A (zh) * | 2009-05-26 | 2013-07-31 | 中国科学院上海生命科学研究院 | miR-24及其抑制剂的应用 |
| CN102198278A (zh) * | 2010-03-24 | 2011-09-28 | 四川大学华西医院 | 恒河猴视网膜变性模型及其药物筛选方法 |
| WO2013166240A1 (en) * | 2012-05-02 | 2013-11-07 | The Board Of Regents Of The University Of Texas System | Micro-rnas involved in macular degeneration |
Non-Patent Citations (2)
| Title |
|---|
| JAMES C. WALKER等: "microRNA-24a is required to repress apoptosis in the developing neural retina", 《GENES & DEVELOPMENT》 * |
| 王磊等: "心肌梗死后MicroRNA-24调控心肌细胞凋亡的作用研究", 《中国医学前沿杂志(电子版)》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108721327A (zh) * | 2018-08-24 | 2018-11-02 | 苏州药明康德新药开发股份有限公司 | 实验动物视网膜色素变性试验模型的制备方法 |
| CN113226020A (zh) * | 2018-11-14 | 2021-08-06 | 珠海岐微生物科技有限公司 | 用于眼内疾病或病症的动物模型、筛选方法和治疗方法 |
| CN113329773A (zh) * | 2018-11-14 | 2021-08-31 | 珠海岐微生物科技有限公司 | 用于眼内疾病或病症的动物模型和筛选方法 |
| CN112043833A (zh) * | 2020-08-31 | 2020-12-08 | 同济大学 | 一种视网膜色素细胞rpe的自噬和凋亡的抑制剂及其应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105943548B (zh) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ou et al. | Synaptic pathology and therapeutic repair in adult retinoschisis mouse by AAV-RS1 transfer | |
| Shiels | TRPM3_miR-204: a complex locus for eye development and disease | |
| CN105943548A (zh) | 一种视网膜变性模型及其药物筛选方法 | |
| Kobayashi et al. | Suppression of epithelial-mesenchymal transition in retinal pigment epithelial cells by an MRTF-A inhibitor | |
| CN105154527B (zh) | Gmfb的应用、gmfb干扰剂及gmfb干扰剂的应用 | |
| Tarchick et al. | Endogenous insulin signaling in the RPE contributes to the maintenance of rod photoreceptor function in diabetes | |
| Tu et al. | AAV-mediated gene delivery of the calreticulin anti-angiogenic domain inhibits ocular neovascularization | |
| Lee et al. | Expression of the primary angle closure glaucoma (PACG) susceptibility gene PLEKHA7 in endothelial and epithelial cell junctions in the eye | |
| JP2022501376A (ja) | 網膜色素変性症を処置するための組成物及び方法 | |
| CN108939066A (zh) | Gmfb抗体作为制备糖尿病视网膜病治疗药物的应用 | |
| WO2023240958A1 (zh) | Jwa多肽在制备抗新生血管性眼病药物方面的应用 | |
| CN106620678A (zh) | Pka抑制剂h‑89的新应用 | |
| Li et al. | ClC-3 chloride channel is involved in isoprenaline-induced cardiac hypertrophy | |
| Chuang et al. | Chloride intracellular channel 4 is critical for the epithelial morphogenesis of RPE cells and retinal attachment | |
| Liang et al. | miR-328-3p affects axial length via multiple routes and anti-miR-328-3p possesses a potential to control myopia progression | |
| CN104940954B (zh) | MicroRNA‑7在制备抗胶质化药物中的应用 | |
| CN109810981A (zh) | 多聚核苷酸及其在心血管疾病诊断和治疗中的应用 | |
| WO2023122719A2 (en) | Csf transport pathway for delivery of agents to inner ear | |
| WO2022041645A1 (zh) | 一种视网膜色素细胞rpe的自噬和凋亡的抑制剂及其应用 | |
| Fan et al. | MicroRNA-126 inhibits pathological retinal neovascularization via suppressing vascular endothelial growth factor expression in a rat model of retinopathy of prematurity | |
| Bonilha et al. | Retinal histopathology in eyes from patients with autosomal dominant retinitis pigmentosa caused by rhodopsin mutations | |
| Koh et al. | VIP and VIP gene silencing modulation of differentiation marker N-cadherin and cell shape of corneal endothelium in human corneas ex vivo | |
| WO2024077856A1 (zh) | Tbx家族转录因子作为靶点在制备用于治疗眼部疾病的药物中的应用 | |
| Kustermann et al. | Survival, excitability, and transfection of retinal neurons in an organotypic culture of mature zebrafish retina | |
| WO2023078099A1 (zh) | 一种用于治疗神经损伤疾病的基因药物 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |