CN108085336A - EGFP expression vector establishments based on col2a1 promoters and the application in transgenic zebrafish - Google Patents

EGFP expression vector establishments based on col2a1 promoters and the application in transgenic zebrafish Download PDF

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CN108085336A
CN108085336A CN201611021808.3A CN201611021808A CN108085336A CN 108085336 A CN108085336 A CN 108085336A CN 201611021808 A CN201611021808 A CN 201611021808A CN 108085336 A CN108085336 A CN 108085336A
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sequence
transgenic zebrafish
col2a1
expression vector
nucleic acid
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邹卫国
牛宁宁
邵瑞
颜广
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Center for Excellence in Molecular Cell Science of CAS
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Shanghai Institutes for Biological Sciences SIBS of CAS
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    • A01K2267/03Animal model, e.g. for test or diseases

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Abstract

The present invention relates to the eGFP expression vector establishments based on col2a1 promoters and the applications in transgenic zebrafish.Specifically, the present invention provides a kind of nucleic acid constructs, and the nucleic acid constructs contains the coded sequence of col2a1 promoters and the fluorescin being operatively connected with the promoter.Preferably, the nucleic acid constructs is expression vector.Therefore the present invention provides the transgenic zebrafish using the expression vector establishment.The invention further relates to obtain application of the transgenic zebrafish in related compound is screened using the method for the present invention.

Description

EGFP expression vector establishments based on col2a1 promoters and in transgenic zebrafish Application
Technical field
The present invention relates to the eGFP expression vector establishments based on col2a1 promoters and the applications in transgenic zebrafish.
Background technology
Collagen is all widely present in animal body Various Tissues and organ, including brain and neuron, blood vessel, skin Skin, muscle, cartilage and bone etc..Collagen is generally synthesized by closing on cell and is secreted into extracellular, is the master of extracellular matrix One of component is wanted, it is vital to play the role of iuntercellular tissue, bonding and signal transmission etc..Cartilage is as collagen One of main carrying histoorgan, while express and include Col1a1, a variety of collagens such as Col2a1 and Col10a1, Middle Col2a1 remains high expression in whole periods that cartilage cell forms and develops, and becomes cartilage cell and cartilage group One of specific marker knitted.
Cartilage is the important and special support organ and tissue of animal.In embryonic development period, cartilage is initially formed, and Osteogenetic process is dominated in growth course and ultimately forms ripe bone (entochondrostosis, Endochondral ossification).Entochondrostosis is that the bones such as long bone primarily form mode, including femur (Femur), shin bone (Tibia), the most of main Limb bone of whole body including ulna (Ulna), radius (Radius), humerus (Humerus) etc., with And the main trunk support bones such as vertebra (Vertebra), rib cage (Rib), it generates and development all derives from entochondrostosis Process.If dyschondroplasia, subsequent osteogenetic process is just influenced whether, the support and movement for causing body are acted on by broken It is bad, seriously affect ontogeny and function.In addition, still some tissue maintains cartilage state always in adult, Including cartilage at nasal cartilages, Ear cartilage and mammal joint etc..Among these, articular cartilage (Articular Cartilage it is) particularly important, necessary buffering and support can be provided for joint motion.So far, arthritis (Arthritis) it is one of highest orthopaedic disease of incidence, seriously affects existence and the quality of life of patient.It is arthritic Pathogenesis is there are many kind, rheumatic arthritis (Rheumatoid arthritis) and pass including inflammatory reaction induction Osteoarthritis (Osteoarthritis) caused by saving cartilage damage.The damage of adult articular cartilage can cause osteoarthritis, be It is a kind of using articular cartilage retrogression pathological changes and secondary osteoproliferation as the chronic joint diseases mainly changed.No matter which kind of joint Inflammation, finally can all cause articular cavity liquid inflammation, and the cartilage of articular surface is damaged.
Cartilage is always without one of organ of blood vessel intrusion energy supply, this results in cartilage damage particularly adult articular soft The damage of bone, often medically irreversible process.So far, it is arthritic for cartilage damage and replacing bone Drug mainly includes:
1st, fastoperation relief of symptoms drug:Rapid analgesia and improvement symptom effect, but osteoarthritis pathology and disease are not influenced Structure changes can not fundamentally treat osteoarthritis.Such drug mainly includes antalgesic, non-steroidal anti-inflammatory drugs and sugared cortical hormone Element etc..
2nd, relief of symptoms medicine and Chondroprotective agents are acted on slowly:Slow down or reverse the cartilage degradation at osteoarthritis morbidity, delay It solves pain and improves function of joint, disturb osteoarthritis pathology process.But the cartilage cell being damaged can not be repaiied Multiple, effect is not strong enough and takes effect slowly.Such drug mainly includes hyaluronic acid, sulfate glucose etc..
3rd, other drugs, including Diphosphonate, cell factor, vitamin A, C, D and E etc..
In summary, it has been found that existing osteoarthritis treatment drug be confined to mostly antagonism inflammation and pain reaction, Enhance knuckle synovia activity etc.;New drug research and exploitation also tend to be confined in terms of promoting cartilage cell activity in vitro, lack row Effective animal model.
Compared with mammal, the transparent zebra fish of body is an excellent model of Investigating Cartilage development.Since 1995 Since year first gfp transgene zebra fish is born, polytype transgenosis zebra has had been established both at home and abroad Fish, for the researchs such as gene function analysis, cell derived and pedigree, drug screening.
The content of the invention
It is contemplated that a kind of visualization of expression vector offer for starting fluorescent protein expression using col2a1 promoters is soft Bone cell activity and the animal model of position, the method for establishing stable internal screening cartilage and osteoarthritis drugs screening.
Therefore, first aspect present invention provides a kind of nucleic acid constructs, and the nucleic acid constructs contains col2a1 promoters With the coded sequence of fluorescin being operatively connected with the promoter.
In one or more embodiments, the sequence such as SEQ ID NO of the col2a1 promoters:Shown in 1.
In one or more embodiments, the fluorescin is selected from green fluorescent protein (GFP), enhanced GFP, red Move fluorescin and blue fluorescent protein.
In one or more embodiments, the coded sequence such as SEQ ID NO of the fluorescin:Shown in 2.
In one or more embodiments, the nucleic acid constructs is also containing Poly A sequences and playback enzyme I-SceI enzymes Enzyme site.
In one or more embodiments, the sequence such as SEQ ID NO of the Poly A:Shown in 3.
In one or more embodiments, the sequence such as SEQ ID NO of the playback enzyme I-SceI restriction enzyme sites:8 institutes Show.
In one or more embodiments, the nucleic acid constructs is expression vector.
In one or more embodiments, the expression vector is using carrier pBluescriptII as framework construction.
In one or more embodiments, the expression vector using pBluescriptII as framework construction, The both ends insertion playback enzyme I-SceI restriction enzyme sites of pBluescriptI I multiple cloning sites, enzyme I-SceI digestions of playbacking at two Col2a1 promoter sequences, fluorescent protein coding sequence and Poly A sequences are sequentially inserted between site.
Second aspect of the present invention provides a kind of method for providing transgenic zebrafish, the described method comprises the following steps:
(1) by expression vector of the present invention be transferred to zebra fish fertilized egg and
(2) fertilized eggs that incubation step (1) obtains, transgenic zebrafish of the harvest with fluorescence signal.
In one or more embodiments, the method further includes:
(3) transgenic zebrafish with fluorescence signal that step (2) obtains is mated, generates progeny transgenic spot Horse fish.
In one or more embodiments, in the transgenic zebrafish, fluorescence signal concentrates on vertebra and head, soft Bone and the position of skeletal system distribution.
In one or more embodiments, at 40~50 minutes after fertilized eggs are given birth to, this is sent out by microinjection The bright expression vector is transferred in fertilized eggs.
In one or more embodiments, after being transferred to expression vector of the present invention, fertilized eggs are put into 26~28 DEG C of water Middle culture, so as to obtain transgenic zebrafish.
Third aspect present invention provides a kind of transgenic zebrafish, and the transgenic zebrafish expresses fluorescin, described Fluorescin is started by external source col2a1 promoters expresses.
In one or more embodiments, the sequence such as SEQ ID NO of the sequence external source col2a1 promoters:1 It is shown.
In one or more embodiments, the transgenic zebrafish has been transferred to the expression vector of the present invention, and expresses Fluorescin.
In one or more embodiments, the fluorescence signal that the transgenic zebrafish generates concentrates on vertebra and head Position.
In one or more embodiments, the transgenic zebrafish is prepared using the method for the invention.
Fourth aspect present invention provides a kind of side screened, identify to cartilage generation and develop the compound having an impact Method the described method includes giving compound described in transgenic zebrafish of the present invention, and analyzes the compound to the transgenosis The step of influence of zebra fish cartilage cell and tissue.
Fifth aspect present invention provides transgenic zebrafish of the present invention and cartilage is occurred in screening and develops what is had an impact Application in compound or gene.
Sixth aspect present invention provides the method that screening treats or prevents the drug of osteoarthritis, and the described method includes give The influence of transgenic zebrafish testing compound of the present invention and the analysis testing compound to cartilage cell and tissue; Wherein, the testing compound of chondrocyte growth will be promoted as the drug candidate for treating or preventing osteoarthritis.
Seventh aspect present invention provides the drug that transgenic zebrafish of the present invention treats or prevents osteoarthritis in screening In purposes.
Eighth aspect present invention also provides a kind of polynucleotide sequence, is selected from:
(1) such as SEQ ID NO:Polynucleotide sequence shown in 1;With
(2) complementary series of (1) described sequence.
Description of the drawings
Fig. 1:Build structure diagram.Col2a1 promoters (1.9kb):The 1.9kb length used in the present invention Col2a1 promoters;GFP:Start the green fluorescent protein of expression as reporter gene, by col2a1 promoters;Poly A:It turns over Translate termination signal;I-SceI:Playback enzyme restriction enzyme site.
Fig. 2:Green fluorescence distribution map.After when fertilized eggs formation 24 and 48 is small, the in vivo green of transgenic zebrafish is glimmering Optical signal.
Fig. 3:Suppressive drug processing influences green fluorescence intensity.24 are formed as a child to zebra fish culture solution in fertilized eggs In be separately added into different drug (A, B) and respectively solvent control DMSO, be further cultured for 24 it is small when after, pass through fluorescence microscope Observe the in vivo green florescent signal variation of zebra fish.
Specific embodiment
The present invention, which constructs, a kind of new can be used for cartilage development and the animal of cartilage protection drug or genescreen Model realizes in situ, the clear and efficient screening in whole animal level.
The animal model of the present invention is transgenic zebrafish model, animal model expression fluorescin, and the fluorescence egg White expression is controlled be subject to external source col2a1 promoters.
It is a discovery of the invention that the promoter for the II collagen type col2a1 genes with certain length that the present invention obtains Sequence can accurately control the expression of col2a1 genes in animal body.In certain embodiments, the present invention uses sequence such as SEQ ID NO:Col2a1 promoters shown in 1.
It is to be understood that in the present invention, " external source " gene refers to for the gene entrained by animal individual itself.Example Such as, the col2a1 promoters of external source refer to the col2a1 promoters that animal individual is transferred to from outside.
Fluorescin can be various fluorescins well known in the art, include but not limited to green fluorescent protein (GFP), Enhanced GFP, red shift fluorescin and blue fluorescent protein.For example, green fluorescent protein is made of 238 amino acid residues Single chain polypeptide.Heim etc. (1995) is by the way of rite-directed mutagenesis, by the 65th mutant serine into threonine or half Guang ammonia Acid, so as to obtain the GFP mutant of fluorescence intensity raising.Ser65 is then substituted for Thr by Guohon S etc., and Phe64 is substituted for Leu further improves the fluorescence intensity (i.e. enhanced GFP) of GFP.The Ser65 of wild type GFP is substituted for Thr, is obtained Only there are one peak in mutant excitation spectrum, and red shift is to 490nm, because of referred to herein as red shift fluorescin.Double-mutant Y66H/ Y154F can generate the blue light of 445nm under the excitation of 381nm, therefore this kind of fluorescin is referred to as blue fluorescent protein.It is all These fluorescins can be used in the present invention.
In certain embodiments, the coded sequence such as SEQ ID NO for the fluorescin that the present invention uses:Shown in 2.
The col2a1 promoters of the present invention and fluorescent protein coding sequence can be cloned into expression vector, via the expression Col2a1 promoters and fluorescent protein coding sequence are transferred in zebra fish by carrier.
The method construction of expression vector of this field routine can be used, wherein the col2a1 promoters and fluorescin of the present invention Coded sequence operability connects.
" operability connection " or the arrangement of similar description finger element, wherein the ingredient is ordered in certain shape, with Just the function needed for them is performed.Thus, operability is connected to the given promoter of coded sequence, correct transcription because In the presence of son etc., the coded sequence effective expression can be made.The promoter need not be abutted with the coded sequence, as long as it plays finger Lead the function of sequence expression.Thus, for example the sequence that is not involved in translating but transcribe may be present in promoter sequence and volume Between code sequence, as transcribed introne;And still it is believed that the promoter sequence " operability connection " is in the volume Code sequence.
Other suitable regulating and controlling sequences can also be contained in expression vector, operably connected with the coded sequence of fluorescin It connects.Suitably " regulating and controlling sequence " refers to the polynucleotide sequence for helping coded sequence expression connected to it, including promoter, transcription Terminator sequence, upstream regulatory domains, polyadenylation signal, untranslated region (including 5'-UTR and 3'-UTR), when appropriate Also targeting sequencing and enhancer, these sequences jointly create item for the transcription and translation of the coded sequence in host cell Part.
For example, regulating and controlling sequence can be suitable transcription terminator, identify to terminate the sequence of transcription for host cell. 3 ' ends of the nucleotide sequence of terminator sequence and encoding fluorescent protein are operatively connected.It is active in the host cell of selection Any terminator of energy can be used in the present invention.In certain embodiments, the present invention uses Poly A as terminator sequence. In certain embodiments, the present invention uses SEQ ID NO:Poly A sequences shown in 2 are as terminator sequence.
Regulating and controlling sequence can also be suitable targeting sequencing, the non-translational region of the mRNA important to host cell translation.Before 5 ' the ends for leading the nucleotide sequence of sequence and encoding fluorescent protein are operatively connected.It is functional in the host cell of selection Any targeting sequencing can be used in the present invention.
Regulating and controlling sequence can also be the amino acid sequence that coding is connected with the amino-terminal end of fluorescin and instruct to be somebody's turn to do The polypeptide of coding enters the signal peptide coding region of cell secretory pathway.5 ' ends of fluorescent protein coding sequence can inherently include day So signal peptide coding region of the translation reading frame of code area segment of the connection with coding secrete polypeptide.Alternatively, coded sequence 5 ' ends can include signal peptide coding region with the code area external source.Signal peptide coding region is included when coded sequence non-natural When, it may be necessary to external signal peptide coding region.Alternatively, external signal peptide coding region can simply replace natural signal Peptide-coding region is to enhance the secretion of polypeptide.
In the present invention, expression vector can be easily subjected to recombinant DNA method and can cause interested core Any carrier (such as plasmid or virus) of nucleotide sequence expression.The selection of carrier is generally dependent on carrier and is wherein imported into the load The compatibility of the host cell of body.The carrier can be circular plasmids that are linear or being closed.
Carrier can be the carrier of autonomous replication, i.e., exist as extrachromosomal entity, replicate independent of chromosome The carrier of duplication, such as plasmid, extra-chromosomal element, minichromosome or artificial chromosome.Carrier can include to ensure certainly Any mode that I replicates.Preferably, after carrier of the invention is imported into host cell, can be integrated into genome.It is more excellent Choosing, can be by occurring homologous recombination, so as to be integrated into gene after carrier of the invention is imported into host cell with genome In group
In certain embodiments, the present invention uses restructuring of the carrier pBluescriptII as the framework construction present invention Expression vector.In these embodiments, playback enzyme I-SceI enzymes are first inserted at the both ends of pBluescriptII multiple cloning sites Then enzyme site is sequentially inserted into col2a1 promoter sequences between two enzyme I-SceI restriction enzyme sites that playback, fluorescin is compiled Thus code sequence and Poly A sequences build and obtain the recombinant expression carrier of the present invention.
Therefore, as an example, expression vector of the invention is using carrier pBluescriptII as skeleton, in the carrier Playback enzyme I-SceI restriction enzyme sites, col2a1 containing operability connection between the multiple cloning sites of pBluescriptII start Subsequence, fluorescent protein coding sequence, Poly A sequences and playback enzyme I-SceI restriction enzyme sites.
The present invention also include a kind of nucleic acid constructs, the construction contain col2a1 promoters and with the promoter operability The coded sequence of the fluorescin of connection.As it was noted above, in certain embodiments, the sequence of the col2a1 promoters is such as SEQ ID NO:Shown in 1.In certain embodiments, the fluorescin be selected from green fluorescent protein (GFP), enhanced GFP, Red shift fluorescin and blue fluorescent protein.In certain embodiments, the coded sequence of the fluorescin such as SEQ ID NO:Shown in 2.In certain embodiments, the nucleic acid constructs is also containing Poly A sequences and playback enzyme I-SceI digestions position Point.In certain embodiments, the sequence of the Poly A such as SEQ ID NO:Shown in 3.In certain embodiments, it is described to return The sequence such as SEQ ID NO of position enzyme I-SceI restriction enzyme sites:Shown in 8.
In certain embodiments, nucleic acid constructs of the invention contains the playback enzyme I-SceI digestions position being operatively connected Point, col2a1 promoter sequences, fluorescent protein coding sequence, Poly A sequences and playback enzyme I-SceI restriction enzyme sites.Some In embodiment, the nucleic acid constructs is previously described expression vector.
It can be by the way that by the nucleic acid constructs of the present invention, especially described expression vector be transferred in the fertilized eggs of zebra fish, incubates Change the fertilized eggs, so as to provide the transgenic zebrafish of the present invention.
The nucleic acid constructs of the present invention is transferred in the fertilized eggs of zebra fish by the mode that microinjection can be used.It in general, will The expression vector of the present invention is transferred to the zebra fish fertilized egg in unicellular period.Fertilized eggs after injection can be put into 26-28 DEG C It is cultivated in water, the juvenile fish raising with fluorescent protein expression is then filtered out, so as to obtain the transgenic zebrafish of the present invention.
In certain embodiments, present invention additionally comprises zebra fish individual of the selection with fluorescence, continue culture and arrive adult, Post-coitum generates the filial generation for still carrying fluorescence.
For the present invention there is thus also provided a kind of transgenic zebrafish, the transgenic zebrafish expresses fluorescin, described glimmering Photoprotein is started by external source col2a1 promoters expresses.In certain embodiments, the sequence external source col2a1 promoters Sequence such as SEQ ID NO:Shown in 1.In certain embodiments, the transgenic zebrafish has been transferred to the expression load of the present invention Body, and express fluorescin.In certain embodiments, the fluorescence signal that the transgenic zebrafish generates concentrate on vertebra and Head position.In certain embodiments, the transgenic zebrafish is prepared using the method for the invention.
The transgenic zebrafish of the present invention can be used for screening to occur and develop the compound having an impact to cartilage.Therefore, The present invention provides a kind of method screened and occur and develop the compound having an impact to cartilage, and the described method includes give this hair Compound described in the bright transgenic zebrafish, and analyze shadow of the compound to transgenic zebrafish cartilage cell and tissue Loud step.This influence can be the influence proved, such as cartilage is promoted to occur and develop;Can also be negative impact, Such as known cartilage occurs and development.
In certain embodiments, the present invention provides transgenic zebrafish of the present invention and cartilage is occurred and is developed to produce in screening Application in the raw compound influenced or gene.
It is described to be used to screen to identify that testing compound that cartilage occurs in it and development has an impact be nucleic acid point Son, protein such as enzyme or antibody, the molecule or natural extract of chemical synthesis.This kind of testing compound can also be known use In drug for the treatment of osteoarthritis or derivatives thereof.Gene to be measured can occur and develop relevant gene with cartilage.
The transgenic zebrafish of the present invention can also be used for screening for treating the drug of osteoarthritis.Therefore, the present invention is gone back A kind of method for the drug for screening and treating or preventing osteoarthritis is provided, this method includes giving transgenosis zebra of the present invention The influence of fish testing compound and the analysis testing compound to cartilage cell and tissue;Wherein, cartilage cell will be promoted The testing compound of growth is as the drug candidate for treating or preventing osteoarthritis.
In certain embodiments, the present invention relates to transgenic zebrafish of the present invention osteoarthritis is treated or prevented in screening Purposes in drug.
Similarly, the testing compound can be nucleic acid molecules, protein such as enzyme or antibody, chemical synthesis molecule or Natural extract.This kind of testing compound can also be known for treating drug of osteoarthritis or derivatives thereof
In the present invention, the molecule of chemical synthesis refers to the molecule for the pure chemistry synthesis for being different from nucleic acid, peptide and natural extract; Natural extract be different from native nucleic acid molecule, native protein non-chemical synthesis molecule or mixture.
With reference to specific embodiment, the present invention is further explained.It is to be understood that these embodiments are merely to illustrate the present invention Rather than it limits the scope of the invention.The experimental method of actual conditions is not specified in the following example, usually according to conventional strip Part such as Sambrook et al., molecular cloning:Lab guide (New York:Cold Spring Harbor Laboratory Press, 1989) condition described in or according to the condition proposed by manufacturer.
Unless otherwise defined, all professional and scientific terms used in text and meaning known to one skilled in the art Justice is identical.In addition, any method similar or impartial to described content and material all can be applied in the present invention.It is described in text Preferred implement methods and materials be for illustrative purposes only.
Embodiment 1:Plasmid construction
First with the zebra fish complete genome DNA extracted as template, zebra fish is obtained by the method for PCR (1889bp, sequence are shown in SEQ ID NO to the promoter of col2a1:1);It is utilized respectively that (sequence is shown in SEQ ID NO containing EGFP:2) (sequence is shown in SEQ ID NO with Poly A sequences:3) pEGFP-N1 (being purchased from Clontech) plasmid is template, passes through the side of PCR Method obtains EGFP-Poly A sequences (984bp).
Col2a1 promoters pass through I digestion of Xho I and Sma, and EGFP-Poly A pass through Sma I and Spe I digestions;It is carrying The both ends insertion playback enzyme I-SceI restriction enzyme sites of body pBluescriptII multiple cloning sites, form transformation carrier pEsce1, should Carrier is transformed by Xho I and Spe I digestions, is connected jointly after recycling, obtains the matter of col2a1 promoter-EGFP-Poly A Grain carrier.
For building primer used in plasmid:
Col2a1-Xho I-F:AATTAACTCGAGCGGCCCTCTGACACCTGATGCCAATTGC(SEQ ID NO:4);
Col2a1-Sma I-R:AATTAACCCGGGGTCTAAAGATTAGACATGCAGGT(SEQ ID NO:5);
GFP-Sma I-F:AATTCCCGGGATGGTGAGCAAGGGCGAGGAGCTG(SEQ ID NO:6);
PolyA-Spe I-R:AATTAAACTAGTAACGCTTACAATTTACGCC(SEQ ID NO:7).
The schematic diagram for building the carrier part structure of gained is as shown in Figure 1.
Embodiment 2:The raising and microinjection of zebra fish
Experiment is cultivated with zebra fish in Chinese Academy of Sciences's Shanghai school of life and health sciences biochemistry and the spot of Institute of Cell Biology Horse fish platform, controlled at 26-28 DEG C.In 40-50min after fertilized eggs are given birth to, microinjection is carried out.After injection by Smart ovum puts into 26-28 DEG C of water and cultivates, 24 and 48 it is small when after, fluorophor formula sem observation EGFP fluorescins can be passed through Brightness and survival rate.
Embodiment 3:Detection of the EGFP green fluorescent proteins in zebrafish embryo
After when injection 24 and 48 is small, zebrafish embryo is transferred to tablet, is placed under body formula mirror, passes through the indigo plant of 488nm Light excites, it is observed that the green fluorescence of zebra fish central axes.At 24 hours, green fluorescence is weaker;From 48 it is small when after, can be with See the green fluorescence of whole vertebra incandescent, it was demonstrated that the activity of col2a1 promoters is properly positioned.In this injection, we amount to 40 fertilized eggs are injected, wherein 25 normal incubations.
It is verified by the PCR for examining fluorescence and GFP, the zebra fish for obtaining 8 successful conversions altogether and having green fluorescence turns Gene success rates are about 32%.
Embodiment 4:The expansion of transgenic zebrafish is numerous
Zebra fish individual of the selection with green fluorescence, continues culture to adult, post-coitum generates a large amount of filial generations.Filial generation spot It is still able to see the expression of green fluorescent protein after the hatching of horse fish, can be used for that Large-scale Screening acts on cartilage and cartilage is thin Drug and gene of born of the same parents etc..
Embodiment 5:The fluorescence intensity of col2a1 1.9Kb promoters connection eGFP transgenic zebrafishes is examined
By fluorescence microscope, it is found that green florescent signal can be observed in pf for 24 hours, focus primarily upon zebra fish Vertebra, head position, this distribution (skull and vertebra position) with cartilage at this moment is than more consistent;When continuing to observe 48 hours Fluorescence signal has further reinforcement when finding small compared with 24, illustrates that cartilage multiplication, size are all promoted (Fig. 2).
Embodiment 6:Micromolecular compound processing inhibits the EGFP expression that col2a1 promoters start
It is studied by early stage, inventor has found there is the expression that some micromolecular compounds can directly affect col2a1.This Wherein, there are two types of the micromolecular compound (A of inhibition:I-BET151, B:(+)-JQ1).Using suitable concentration A and B not between Disconnected processing zebra fish fertilized egg, it is found that A and B does not interfere with the hatching rate and survival rate of zebra fish, but can be apparent Inhibit the green fluorescence intensity (Fig. 3) that col2a1 promoters start.It is soft that this shows that this transgenic zebrafish can be used for influencing The screening of the micromolecular compound and drug of bone development.
Sequence table
<110>Shanghai Inst. of Life Science, CAS
<120>EGFP expression vector establishments based on col2a1 promoters and the application in transgenic zebrafish
<130> 168260
<160> 8
<170> PatentIn version 3.3
<210> 1
<211> 1889
<212> DNA
<213>Zebra fish(Barchydanio rerio var)
<220>
<223>Col2a1 promoters
<400> 1
cctctgacac ctgatgccaa ttgcggtcag tgttttgctg gcgacacaga ttcttgtgcc 60
aatggccagg cccctcatca tctgatccgc agcaacccag ccaccctaca cacccctgga 120
gcctctccgt gttctcctca tccctctacc tttccgcact ctccctccat ccacacccgc 180
ggctctcttc tcccccactg cccggtgctc tctcacattc ctcaggtctg cacacagagc 240
cgcattgtgt gtgtgtctta cagagcacac agtcagggct catttcggac acacacacac 300
atccaacagg gtgtgtgcac agtcgcagcg atgcgtacac acacatacac atatcccttc 360
ataaaaccaa tagacatgca ttcatgtgcg cacgcgaccg caaacacaca cactctctga 420
ttttcatatg tgcacactgg atacacactc atctacatac acaggatgtc tcacaccgag 480
gccgagattc cagtatcctt attccgtgtt tcttttttct tttttactct ttcatgattc 540
aattttttca ctcggttctt ggagtttgat cttataatct cttgagcatt gtgatttttc 600
actcctcctc tgttcccaca gtgggacaga tgatatggta gatgctttat tgtgattgga 660
ttgaggagca gttacataaa ggaaataaag acacaacaaa aatacatctg tgatgaagat 720
ttttgggtag ttttagcaat aatatagatc aacaatttta gatactttta gagtatataa 780
ttgaaaggta aatcattttt taacatgttt tgagaaaaat ctgatacttc aacactaata 840
tattatatgt attcatattt taaataactt atactttcca ttttaactga gttttagagt 900
tttatatagt catttgcaaa agtgcttgtt aatagtgttt agttttacgt ttactaaaca 960
ataatcacac tgcatgtgac acaaagagct gctgttaggt tgctttggga gtacaggaca 1020
tttatttgga ttgcaataac aacttctctg aagcagctgg cgctctacca gagaaataat 1080
gtaagcttag tttacattta gtcatgtggt gccaagaatt taaggttcac tgattatcag 1140
ttgataaggt taattcaagc ttggcaagct aaaatggtga cattgttaat taagtggaat 1200
atttataatc agcatgttca acaactttaa caaaataagt taggatgtaa aactatacta 1260
cttacttttt agtttgcagt ttttaaaatg gaatcttcat aagtgtatca tgatgtatca 1320
tgtgattgac tgtacactgt atgcataagg acccatgata tatgctaaaa cttccctgag 1380
gttatctcac gtttttaatg gtcatgtgcg accacagtgg gtcaaaatct ttgaaacaat 1440
gaatgtattt tggttctcca agtctctttt ctgagcaaag gccattatga tgcactttca 1500
tacaaaaggc acagagagaa agcccaccac ttgccaggaa agggcaaaaa ggggaggggg 1560
tggatgggtt tggatggaat tgttcttgag acagaggggt ggtggacttc tttcccaatg 1620
gggtgggctg gggggctcgt atttcagcgc tcatgggggt cggggttgga ctcacttttt 1680
gggatatact aagattcata aatgcgccag tggacataaa accgcggagc tctgactgac 1740
gcggtgggtt ctgtctgtgt gtgcctggcg tcggatcctc ccaaacacat ccacatccac 1800
ttccacactc cccgcgagca ctgggctgcc gctccgccgg gtcttcggcg actttcaccc 1860
cttaggacct gcatgtctaa tctttagac 1889
<210> 2
<211> 720
<212> DNA
<213>Artificial sequence
<220>
<223>The coded sequence of green fluorescent protein
<400> 2
atggtgagca agggcgagga gctgttcacc ggggtggtgc ccatcctggt cgagctggac 60
ggcgacgtaa acggccacaa gttcagcgtg tccggcgagg gcgagggcga tgccacctac 120
ggcaagctga ccctgaagtt catctgcacc accggcaagc tgcccgtgcc ctggcccacc 180
ctcgtgacca ccctgaccta cggcgtgcag tgcttcagcc gctaccccga ccacatgaag 240
cagcacgact tcttcaagtc cgccatgccc gaaggctacg tccaggagcg caccatcttc 300
ttcaaggacg acggcaacta caagacccgc gccgaggtga agttcgaggg cgacaccctg 360
gtgaaccgca tcgagctgaa gggcatcgac ttcaaggagg acggcaacat cctggggcac 420
aagctggagt acaactacaa cagccacaac gtctatatca tggccgacaa gcagaagaac 480
ggcatcaagg tgaacttcaa gatccgccac aacatcgagg acggcagcgt gcagctcgcc 540
gaccactacc agcagaacac ccccatcggc gacggccccg tgctgctgcc cgacaaccac 600
tacctgagca cccagtccgc cctgagcaaa gaccccaacg agaagcgcga tcacatggtc 660
ctgctggagt tcgtgaccgc cgccgggatc actctcggca tggacgagct gtacaagtaa 720
<210> 3
<211> 264
<212> DNA
<213>Artificial sequence
<220>
<223>Poly A sequences
<400> 3
agcggccgcg actctagatc ataatcagcc ataccacatt tgtagaggtt ttacttgctt 60
taaaaaacct cccacacctc cccctgaacc tgaaacataa aatgaatgca attgttgttg 120
ttaacttgtt tattgcagct tataatggtt acaaataaag caatagcatc acaaatttca 180
caaataaagc atttttttca ctgcattcta gttgtggttt gtccaaactc atcaatgtat 240
cttaaggcgt aaattgtaag cgtt 264
<210> 4
<211> 40
<212> DNA
<213>Artificial sequence
<220>
<223>Primer
<400> 4
aattaactcg agcggccctc tgacacctga tgccaattgc 40
<210> 5
<211> 35
<212> DNA
<213>Artificial sequence
<220>
<223>Primer
<400> 5
aattaacccg gggtctaaag attagacatg caggt 35
<210> 6
<211> 34
<212> DNA
<213>Artificial sequence
<220>
<223>Primer
<400> 6
aattcccggg atggtgagca agggcgagga gctg 34
<210> 7
<211> 31
<212> DNA
<213>Artificial sequence
<220>
<223>Primer
<400> 7
aattaaacta gtaacgctta caatttacgc c 31
<210> 8
<211> 18
<212> DNA
<213>Artificial sequence
<220>
<223>Playback enzyme I-SceI restriction enzyme sites
<400> 8
tagggataac agggtaat 18

Claims (10)

1. a kind of nucleic acid constructs, the nucleic acid constructs contain zebra fish col2a1 promoters and with promoter operability The coded sequence of the fluorescin of connection.
2. nucleic acid constructs as described in claim 1, which is characterized in that
The sequence of the col2a1 promoters such as SEQ ID NO:Shown in 1;And/or
The fluorescin is selected from green fluorescent protein (GFP), enhanced GFP, red shift fluorescin and blue fluorescent protein;It is excellent Selection of land, the coded sequence such as SEQ ID NO of the fluorescin:Shown in 2;And/or
The nucleic acid constructs is also containing Poly A sequences and playback enzyme I-SceI restriction enzyme sites;
Preferably, the sequence of the Poly A such as SEQ ID NO:Shown in 3;
Preferably, the sequence of the I-SceI restriction enzyme sites such as SEQ ID NO:Shown in 8.
3. such as the nucleic acid constructs any one of claim 1-2, which is characterized in that the nucleic acid constructs is expression Carrier;
Preferably, the expression vector is using carrier pBluescriptII as framework construction;
It is highly preferred that the expression vector is using pBluescriptII as framework construction, in pBluescriptII multiple cloning sites Both ends insertion playback enzyme I-SceI restriction enzyme sites, be sequentially inserted into col2a1 between two enzyme I-SceI restriction enzyme sites that playback and open Promoter sequences, fluorescent protein coding sequence and Poly A sequences.
4. a kind of method for providing transgenic zebrafish, the described method comprises the following steps:
(1) expression vector described in claim 3 is transferred to zebra fish fertilized egg;With
(2) fertilized eggs that incubation step (1) obtains, transgenic zebrafish of the harvest with fluorescence signal;
Optionally, the method further includes:
(3) transgenic zebrafish with fluorescence signal that step (2) obtains is mated, generates progeny transgenic zebra Fish.
5. method as claimed in claim 4, which is characterized in that the described method includes:
At 40~50 minutes after fertilized eggs are given birth to, the expression vector is transferred in fertilized eggs by microinjection;With
After being transferred to the expression vector, fertilized eggs are put into 26~28 DEG C of water and are cultivated, so as to obtain transgenic zebrafish;
Preferably, in the transgenic zebrafish, fluorescence signal concentrates on vertebra and head position.
6. a kind of screen the method for occurring and developing the compound having an impact to cartilage, the described method includes:
Give compound described in the transgenic zebrafish built using method any one of claim 4-5;With point Analyse influence of the compound to transgenic zebrafish cartilage cell and tissue.
7. cartilage is occurred in screening using the transgenic zebrafish that method any one of claim 4-5 is built Application in the compound or gene that are had an impact with development.
8. a kind of method for screening the drug for treating or preventing osteoarthritis, the described method includes:
It gives the transgenic zebrafish testing compound built using method any one of claim 4-5 and divides Analyse influence of the testing compound to cartilage cell and tissue;
Wherein, the testing compound of chondrocyte growth will be promoted as the drug candidate for treating or preventing osteoarthritis.
9. it is treated or prevented using the transgenic zebrafish that method any one of claim 4-5 is built in screening Purposes in the drug of osteoarthritis.
10. a kind of polynucleotide sequence, is selected from:
(1) such as SEQ ID NO:Polynucleotide sequence shown in 1;With
(2) complementary series of (1) described sequence.
CN201611021808.3A 2016-11-21 2016-11-21 EGFP expression vector establishments based on col2a1 promoters and the application in transgenic zebrafish Pending CN108085336A (en)

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