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114 results about "Cre recombinase" patented technology
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Cre recombinase is a tyrosine recombinase enzyme derived from the P1 bacteriophage. The enzyme uses a topoisomerase I like mechanism to carry out site specific recombination events. The enzyme (38kDa) is a member of the integrase family of site specific recombinase and it is known to catalyse the site specific recombination event between two DNA recognition sites (LoxP sites). This 34 base pair (bp) loxP recognition site consists of two 13 bp palindromic sequences which flank an 8bp spacer region. The products of Cre-mediated recombination at loxP sites are dependent upon the location and relative orientation of the loxP sites. Two separate DNA species both containing loxP sites can undergo fusion as the result of Cre mediated recombination. DNA sequences found between two loxP sites are said to be "floxed". In this case the products of Cre mediated recombination depends upon the orientation of the loxP sites. DNA found between two loxP sites oriented in the same direction will be excised as a circular loop of DNA whilst intervening DNA between two loxP sites that are opposingly orientated will be inverted. The enzyme requires no additional cofactors (such as ATP) or accessory proteins for its function.
Recombinase-based methods for producing expression vectors and compositions for use in practicing the same
Methods are provided for producing an expression vector. In the subject methods, donor and acceptor vectors are combined in the presence of a recombinase to produce an expression vector that includes a first and second recombinase recognition site oriented in the same direction, wherein the first and second recombination sites are able to recombine with each other. In the subject methods, one of the donor and acceptor vectors includes a single recombinase recognition site while the other includes two recombinase recognition sites. Also provided are compositions for use in practicing the subject methods, including the donor and acceptor vectors themselves, as well as systems and kits that include the same. The subject invention finds use in a variety of different applications, including the transfer or cloning of a nucleic acid of interest from a first vector into one or more expression vectors, etc.
Owner:LIFE TECH CORP
Bacterial Mediated Delivery of Nuclear Protein Into Pluripotent and Differentiated Cells
ActiveUS20120021517A1Reduce host cell toxicityEfficient systemSugar derivativesBacteriaDirected differentiationType three secretion system
A modified P. aeruginosa type III secretion system has been developed that efficiently delivers selected proteins into a host cell. In one example, a functional nuclear Cre Recombinase is injected into embryonic stem (ES) cells and can be used to induce pluripotent stem (iPS) cells. This method of in vitro lineage directed differentiation prevents insertional mutagenesis and provides a route to selected stem cell renewal and cell-based therapies.
Owner:UNIV OF FLORIDA RES FOUNDATION INC
Method for selecting recombinase variants with altered specificity
InactiveUS6890726B1Wide variationSimple designSugar derivativesMicrobiological testing/measurementCre recombinaseWild type
Disclosed are variants of Cre recombinase that have broadened specificity for the site of recombination. Specifically, the disclosed variants mediate recombination between sequences other than the loxP sequence and other lox site sequences on which wild type Cre recombinase is active. In general, the disclosed Cre variants mediate efficient recombination between lox sites that wild type Cre can act on (referred to as wild type lox sites), between variant lox sites not efficiently utilized by wild type Cre (referred to as variant lox sites), and between a wild type lox site and a variant lox site. Also disclosed are methods or recombining nucleic acids using the disclosed Cre variants. For example, the disclosed Cre variants can be used in any method or technique where Cre recombinase (or other, similar recombinases such as FLP) can be used. In addition, the disclosed Cre variants allow different alternative recombinations to be performed since the Cre variants allow much more efficient recombination between wild type lox sites and variant lox sites. Control of such alternative recombination can be used to accomplish more sophisticated sequential recombinations to achieve results not possible with wild type Cre recombinase.
Owner:OKLAHOMA MEDICAL RES FOUND
Double chain adaptor, application thereof and method for constructing end-pairing DNA library
ActiveCN103667273AEfficient cyclizationNucleotide librariesMicrobiological testing/measurementCre recombinaseDNA fragmentation
Owner:BEIJING NOVOGENE TECH CO LTD
Recombinase-based methods for producing expression vectors and compositions for use in practicing the same
Owner:LIFE TECH CORP
Site-specific integration and stacking of transgenes in soybean via DNA recombinase mediated cassette exchange
ActiveUS8293533B2Other foreign material introduction processesFermentationCre recombinaseDNA construct
Owner:EI DU PONT DE NEMOURS & CO
Method of preparing induced pluripotent stem cells deprived of reprogramming gene
InactiveUS20110003365A1Efficiently depriving an iPS cellEfficiently preparing a safe iPS cellVirusesGenetically modified cellsCre recombinaseSomatic cell
Provided is a method of preparing an induced pluripotent stem cell (iPS cell) deprived of a reprogramming gene, including providing an iPS cell having an expression vector wherein a loxP sequence is placed on each of the 5′ and 3′ sides of the reprogramming gene or a vector component necessary for the replication of the reprogramming gene in the same orientation, and treating the IPS cell with Cre recombinase. Also provided are an iPS cell deprived of a reprogramming gene, as obtained by the method, and a use of the iPS cell as a cell source for producing somatic cells.
Owner:KYOTO UNIV
Transgene report pig detecting Cre site special recombinase active and culturing method
InactiveCN101550427AActivity monitoringPlay a monitoring roleMicrobiological testing/measurementFermentationEngineered geneticToxicology
The present invention provides a transgene report pig detecting Cre site special recombinase active and a culturing methodThe method includes steps as follows: building LoxP site anchoring end terminal, receiving a target carrier of report gene, when Cre recombinase exist, deleting the end terminal anchored by Loxp, and expressing the received report gene, accordingly, monitoring Cre recombinase activity; filter out a fibroblast which can be special detected Cre activity through cell transfection and cell filtering technique; using body nucleus transplantation technique for processing cloning pig. The method is used for monitoring Cre recombinase activity in body, provides a monitoring tool for establishing human disease model, solves problems of immature technique for transgene cloning pig and low efficiency.
Owner:JILIN UNIV
Method for conditional knockout of Lox13 gene of mouse and application
ActiveCN104651400AMicrobiological testing/measurementVector-based foreign material introductionCre recombinaseEmbryo
The invention relates to a method for conditional knockout of Lox13 gene of a mouse and an application. The method comprises the steps that loxP loca of a Cre recombinase targeting sequence are added to the two ends of a key exon of an Lox13 gene; a conditional gene knockout carrier is constructed, and transfected with an embryonic stem cell (ESC); microinjection is conducted for making a floxed mouse capable of being used for conditional gene knockout; the floxed mouse is mated with a Cre mouse with corresponding tissue specificity; and the mouse of which an Lox13 gene can be knocked out at a specific tissue is obtained. The mouse obtained by the method serves as a model mouse for morbidity research on a cleft palate disease, so that the functions of the Lox13 gene in the tissue and the effects of the Lox13 gene in an embryonic development regulation mechanism can be illustrated in details. In addition, the mouse can serve as an animal model for researching the functions of the Lox13 gene, and has important application values.
Owner:SHANDONG UNIV
Construction method of AURKA-CKO1-N condition gene knockout mouse model
The invention relates to a construction method of an AURKA-CKO1-N condition gene knockout mouse model. A recombination targeting carrier is constructed, embryonic stem cell are transfected after linearization, embryonic stem cell with homologous recombination are screened for clone, a donor mice blastula is injected after amplification to produce a chimera mouse; the chimera mouse copulates with an flp mouse to obtain a male F1 generation of mouse; and the male F1 generation of mouse copulates with a mouse whose tissues include specific Cre recombinase, and the AURKA-CKO1-N condition gene knockout mouse model is obtained in the next generation. According to the AURKA-CKO1-N condition gene knockout mouse model, an AURKA gene loses functions in specific tissues and cells, and an ideal modelis provided for research on an action mechanism of Aurora-A in tumorigenesis development.
Owner:XUZHOU MEDICAL UNIV
Reversible immortalization of human renal proximal tubular epithelial cells
The present provides reversibly immortalized RPTECs and methods for making and utilizing these cells. Specifically, the present invention provides a method of reversibly immortalizing RPTECs by introducing a first vector containing a human telomerase catalytic subunit (hTERT) gene flanked by loxP sites and a second vector containing an SV40 T antigen (Tag) gene flanked by loxP sites. Immortalization can be reversed by introduction of a third vector containing a Cre recombinase or Cre variant gene. The reversibly immortalized RPTECs generated by this method may be used for a variety of applications, including screening of test agents for the ability to modulate renal toxicity or incorporation into devices designed to mimic the activity of the renal proximal tubules.
Owner:CITY OF HOPE
Transgenic animals with customizable traits
Disclosed are materials and methods for creating customizable traits in animals. In the demonstration of the principle of the subject invention, a keratin-14 specific promoter is used with, red fluorescent protein in the loxp cassette, dominant black (ΔG23) beta defensin 103 in the pigment cassette, and an SV40 (with intron) polyadenylation sequence. When Cre recombinase (or HTNCre) is applied to the animal's skin in a carrier base (e.g., lipid bilayers), fur is permanently genetically modified to turn black in the shape in which it was applied.
Owner:AGGENETICS
Method for building human psoriasis mouse model and application of model
The invention relates to the technical field of animal models and in particular relates to a method for building a human psoriasis mouse model and application of the model to drug screening. The method adopts a conditional gene targeting technology and comprises the following steps: creating a marked mouse with homologous loxP sites on the two sides of an IKK2 gene through a homologous recombination process, hybridizing the marked mouse with a mouse with Cre recombinase expression under the control of a tissue-specific promoter SM22, and screening to obtain the human psoriasis mouse model. The human psoriasis mouse model has the advantages that the building method is simple, convenient and economic, and the psoriasis expression of the human psoriasis mouse model is highly similar to that of a human body; moreover, the animal model is convenient to use and has market values and medical application prospects.
Owner:应哲康
Transgene pig for preparing animal model for human diseases and culturing method thereof
InactiveCN101570763AVector-based foreign material introductionAnimal husbandrySomatic cellGenetic engineering
The invention provides a transgene pig for preparing an animal model for human diseases and a culturing method thereof. An inducible expression Cre recombinase expression vector pET28a-Mxl-Cre-BGHpolyA-FRT2neoR is constructed by a genetic engineering method, and can express Cre recombinase after the expression vector is induced by interferon inducer poly IC (poly I:C) so as to be used for knocking out a target gene; porcine mechanocyte capable of inducibly expressing the Cre recmbinase can be screened through technology of cell transfection and cell screening; and the pig is cloned by the technology of somatic cell nuclear transplantation. The cloned pig can be used for preparing the animal model for knocking out genes of human diseases.
Owner:JILIN UNIV
Cre fusion protein functional test cell and modified Cre fusion protein
InactiveCN102827873AHigh membrane penetration efficiencyImprove biological activityMicrobiological testing/measurementTransferasesHEK 293 Cell LineDrug biological activity
The invention discloses a Cre fusion protein functional test cell and a modified Cre fusion protein. The Cre fusion protein functional test cell takes an HEK (human embryonic kidney) 293 cell as a host cell, a pAcmy (African cassava mosaic virus)-stop-EGFP (enhanced green fluorescent protein) carrier and phi C31 integrase are used for co-transfection of the host cell. Through the action of the phi C31 integrase, the carrier which carries an LoxP (locus of X-over P1) element having a Cre recombinase detection function is integrated to a pseudo attP (attachment P) site of an HEK 293 cell line in a single copying manner, so a stable and reliable cell model is provided for researching the Cre fusion protein membrane penetrating efficiency and biological activity. The Cre fusion protein HNTC (hemagglutinin-neuraminidase cytotoxic T) which is modified by TAT (transactivator) and NLS (nuclear localization signal) polypeptides has high membrane penetrating efficiency and good biological activity, can be effectively used as a tool for genetic manipulation at a mammalian cell chromosome level.
Owner:NORTHWEST A & F UNIV +1
Method for deleting exogenous gene in transgenic cell at fixed point
ActiveCN101760473APrecise screeningAvoid drug screeningMicrobiological testing/measurementIndividual particle analysisAnimal foodCre recombinase
Owner:BEIJING GEFUCURE BIOTECHNOLOGY LIMITED COMPANY
Transgenic animals with customizable traits
Disclosed are materials and methods for creating customizable traits in animals. In the demonstration of the principle of the subject invention, a keratin-14 specific promoter is used with, red fluorescent protein in the loxp cassette, dominant black (ΔG23) beta defensin 103 in the pigment cassette, and an SV40 (with intron) polyadenylation sequence. When Cre recombinase (or HTNCre) is applied to the animal's skin in a carrier base (e.g., lipid bilayers), fur is permanently genetically modified to turn black in the shape in which it was applied.
Owner:AGGENETICS
Cre recombinase recombination gene and Cre/loxP-mediated transgenosis safe plant expression vector
InactiveCN101845445AImprove expression efficiencyAvoid leaky expressionVector-based foreign material introductionDNA/RNA fragmentationHeat shockCre recombinase
The invention discloses a Cre recombinase recombination gene and a Cre / loxP-mediated transgenic safe plant expression vector, relates to a Cre recombinase recombination gene and a plant expression vector and solves the problems of the traditional method for removing marker genes in transgenic plants by the traditional Cre / loxP locus specific recombination system has the problem that the deleting efficiency is reduced because the Cre / loxP locus specific recombination system has the reversibility. The crein gene sequence is as shown in SEQ ID NO:1. The vector contains a maker gene bar, a crein gene, a heat shock promoter hsp and a forming type promoter CaMV35S. The invention can improve the safety of the transgenic plants.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY
Expression vector containing regulatably expressible cre recombinase gene and reporter gene LacZ, construction method and application thereof
InactiveCN105002215AVector-based foreign material introductionAnimal husbandryCre recombinasePregnancy
Belonging to the field of biotechnologies, the invention discloses an expression vector containing regulatably expressible cre recombinase gene and reporter gene LacZ, a construction method and application thereof. The expression vector provided by the invention is pBI-3-LacZ-cre, and the expression vector contains the lacZ reporter gene, the Cre recombinase gene and a bidirectional promoter tetO element. According to the invention, the expression vector pBI-3-LacZ-cre is introduced into a mouse fallopian tube to conduct pregnancy so as to obtain a transgenic mouse. The transgenic mouse is hybridized with two applied model animals, i.e. an rTALAP-1 mouse able to induce liver specific expression of rtTA molecules and an HBV Tg (Transgenic) mouse able to regulatably express HBV genome, and then after repeated mating, a liver inducibly expressible Tet-on and Cre / loxP combined dual-control strategy triple-transgenic mouse new model can be obtained finally. The expression vector can be effectively applied to screening and evaluation of HBV (hepatitis B virus) inhibitors or drugs, research of HBV pathogenic mechanism, host immune response after HBV infection and other key issues.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Construction and application of mouse model with conditional knockout of MACF1 gene in osteoblast
InactiveCN107114311AReduced ability to formMicrobiological testing/measurementAnimal husbandryDiseaseOsteopetrosis
The invention discloses a construction and an application of a mouse model with conditional knockout of an MACF1 gene in osteoblast and is used for solving the technical problem that the practicality is poor in the prior art. The technical scheme is that the mouse model (Sp7-Cre; MACF1f1 / f1) with conditional knockout of the MACF1 gene in the osteoblast is obtained by means of a Cre-Loxp system by mating a MACF1f1 / f1 mouse with a Sp7-Cre transgenic mouse, osteoblast of which specifically expressed Cre recombinase. The bone forming ability of the mouse with conditional knockout of the MACF1 gene in the osteoblast is reduced. The model can be used for researching the function of the MACF1 gene in the osteoblast and the effect thereof in a bone forming process, and meanwhile, can be used as an animal model for researching pathogenesis / generation mechanism of osteoporosis or other bone formation related diseases, and is used for screening drugs for preventing, treating or improving the diseases.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Lentiviral expression vector pLOX-CMV-E/P and construction and application thereof
InactiveCN104372027AStable expressionFermentationVector-based foreign material introductionAgricultural scienceFluorescence
The invention discloses a lentiviral expression vector pLOX-CMV-E / P and construction and application thereof. Multiple cloning site which is inserted into the downstream part of a CMV promoter of the vector can be recognized by 7 restriction endonucleases, including SpeI, BclI, EcoRI, Paci, XhoI, SalI and BamHI. The application of the vector comprises the following steps: inserting a target gene to the multiple cloning site to realize the stable expression of the target gene; using Puromycin resistance gene and EGFP which is driven by EF1alpha promoter to perform fluorescence tracing and drug resistance screening; based on LoxP site inserted in 3'LTR region and the transcription and reverse transcription characteristic of lentivirus, realizing effective deleting of an exogenous gene and a reporter gene under the condition of Cre recombinase expression. The vector disclosed by the invention can realize the package of the lentiviral particles by commonly transfecting 293T cell together with pCMVR8.74 and PMD2.G vector.
Owner:JINAN UNIVERSITY
Recombinase-based amplification with substitute nucleotides
This invention covers methods for isothermal amplification of DNA. It is based on the unexpected discovery that primers having, at some positions, adenine substituted by 2-aminopurine or diaminopurine, guanine by inosine, thymine by 2-thiothymine, and cytosine by N4-ethylcytosine (“substituted primers”) were accepted by enzymes used in the standard recombinase polymerase assay (RPA). Further unexpected was the discovery that target nucleotides are efficiently amplified in an RPA-like process (hereinafter abbreviated as simply RPA) using substituted primers. RPA-like processes were also discovered to amplify target DNA with substituted primers tagged with oligonucleotides incorporating nucleotides from an artificially expanded genetic information system (AEGIS).
Owner:BENNER STEVEN A +1
Mouse model with IRTKS gene in liver specifically eliminated as well as construction and applications of mouse model
InactiveCN106755094AReliable RejectionIncrease weightNucleic acid vectorAnimals/human peptidesCre recombinaseGlycemic
The invention discloses a mouse model with the IRTKS gene in the liver specifically eliminated as well as construction and applications of the mouse model. Through homologous recombination, a 2.245-kb frt-neo-frt-loxp-Flox-loxp sequence replaces a sequence containing exon2 in the mouse IRTKS gene, and thus the chimeric mouse with IRTKS<flox / +> is obtained; by utilizing the Cre recombinase, the obtained chimeric mouse mates with the mouse Alb-Cre with specific expression of Cre of the liver, and finally, the mouse model with IRTKS gene in the liver specifically eliminated is obtained. The mouse model with the IRTKS gene eliminated constructed by adopting the method provided the invention can be used for researching diabetes mellitus; through the body weight, fasting blood-glucose, sugar tolerance and clinicopathologic analysis, the result shows that the features conform to the human diabetes mellitus morbidity features, and thus a good animal model is provided for researching the diabetes mellitus morbidity mechanism and evaluating and screening treatment medicines.
Owner:SHANGHAI JIAO TONG UNIV
Transgenic animals with customizable traits
Disclosed are materials and methods for creating customizable traits in animals. In the demonstration of the principle of the subject invention, a keratin-14 specific promoter is used with red fluorescent protein in the loxp cassette, dominant black ([Delta]G23) beta defensin 103 in the pigment cassette, and an SV40 (with intron) polyadenylation sequence. When Cre recombinase (or HTNCre) is applied to the animal's skin in a carrier base (e.g., lipid bilayers), fur is permanently genetically modified to tum black in the shape in which theHTNCre was applied.
Owner:AGGENETICS
HBD3 mammary gland specific expression vector and constructed recombinant cell
InactiveCN102628061ATo achieve antibacterial functionAvoid safety hazardsFermentationVector-based foreign material introductionEmbryoΦc31 integrase
The invention discloses a HBD3 mammary gland specific expression vector and a constructed recombinant cell. The vector comprises a HBD3 gene with a signal transduction peptide, and CSN5 and CSN3 are set upstream and downstream of the HBD3 gene respectively for serving as regulating and controlling elements. The host cell of the recombinant cell is a bovine fetal fibroblast cell, an exogenous expression vector pARNG-HBD3 is integrated to a pseudo attP locus under the action of phiC31 integrase, positive cloning is realized through medicament screening, and an antibiotic screening marker between two homodromous LoxP sequences on the vector is removed through Cre recombinase treatment. A HBD3-containing bovine fetal fibroblast cell from which an antibiotic screening marker is removed is taken as a nuclear donor cell of a transgenic cloning embryo through nucleus transplantation, gene cloning embryos are obtained through SCNT (Somatic Cell Nuclear Transfer), and a milk cow which is free from a HBD3 transgenic gene of the antibiotic screening marker can be produced by transferring these embryos into a receptor cow.
Owner:NORTHWEST A & F UNIV +1
Embedded tissue-specific expressed Cre tool mice built by utilizing Flp-Frt system
InactiveCN102373237AVector-based foreign material introductionAnimal husbandryCre recombinaseGene vector
Traditional Cre transgene has difficultly in carrying out tissue-specific expression. The invention carries out innovation based on a double transgenic technique and a Flp-Frt technique. The invention is characterized in that: firstly, an STOP original part is added in front of a translation initiation codon of Cre to inhibit the expression of downstream Cre, and two Frt sequences are separately added to the upstream and downstream of the STOP original part; then the STOP original part between the two Frt sequences can be specifically deleted by utilizing Flp recombinase, thus the downstream Cre recombinase can be expressed at the moment; and tissue-specific promoters are added in front of the expression plasmids of Cre and Flp, thus the tissue Cre which is expressed in both the promoters can be expressed. The invention has the beneficial effects that: improvement and innovation are carried out on a traditional building method of a tissue-specific Cre transgenic carrier; and the correct tissue specificity and time specificity of Cre are calibrated by utilizing an intersection of two specific promoters, thus promoting the research on gene function utilizing conditional gene knockout mice and further being applied to research of medical and pharmaceutical targets.
Owner:NANJING UNIV SCI PARK DEV
Marking-free porcine beta-alexin 2 gene fixedpoint knock-in plasmid vector and application thereof
InactiveCN110951784AImprove disease resistance traitsStable introduction of DNANucleic acid vectorBiotechnologyEngineered genetic
The invention belongs to the technical field of animal gene engineering, and particularly relates to a marking-free porcine beta-alexin 2 gene fixedpoint knock-in plasmid vector and an application thereof. The marking-free porcine beta-alexin 2 gene fixedpoint knock-in plasmid vector disclosed by the invention is relevant to the field of transgenic animals. A donor plasmid pcCAG-R26-PBD2-T2A-PBD2which can express dual-copy pbd-2 genes is constructed, and the donor plasmid further contains a neomycin resistant gene neoR expression box having loxP sequences on two sides. Experiment certificatesthat when the plasmid and a targeting plasmid pX330-pRosa26 which can express Cas9 protein and guide RNA targeting a porcine Rosa26 site at the same time are electrically shifted into recipient cellsat the same time, fixedpoint integration of a pbd-2 gene into the porcine Rosa26 site is realized; through Cre recombinase, resistant marking is deleted; and through somatic nucleus transplantation and embryo transplantation, pbd-2 gene fixedpoint knock-in pigs free from resistant marking can be obtained.
Owner:HUAZHONG AGRI UNIV
Construction method of recombinant bacillus subtilis of high-yield pullulanase
The invention discloses a construction method of recombinant bacillus subtilis of high-yield pullulanase. The method comprises the steps that acid and heat resistance pullulanase gene is optimized by a codon, then is spiced artificially with two different secretory peptides and promoters to form a artificial operon and integrated into Bacillus subtilis A164; integration sites are the positions at which alkaline protease aprE and amylase gene amyE locate respectively; in addition, by the plasmid expression of Cre recombinase , resistance gene integrated into A164 is knocked down; pullulanase fermentation enzyme activity of pullulanase recombinant production bacterial strain CNP2 exceeds 1000 U / mL.
Owner:BAIYIN SINO BIOTECH
Plasmid type adenovirus vector pAd-NRIP1 and construction method thereof
InactiveCN102399819AEfficient expressionFermentationVector-based foreign material introductionDigestionLiposome
Construction of a recombinant adenovirus vector of an NRIP1 (nuclear receptor interacting protein 1) gene of Qinchuan cattle can be applied to gene function research and dentification on Qinchuan cattle NRIP1, reconstruction of seed cell, regulation on gene metabolism of muscle, fat and reproduction, etc. The Qinchuan cattle NRIP1 gene is inserted under a CMV promoter of a pAdTrack-CMV adenovirusshuttle plasmid to construct a recombinant shuttle plasmid pAdTrack-CMV-NRIP1. After linearization, a PmeI transforms an E.coli BJ5183 competent cell containing a pAdEasy-1 plasmid; an efficient homologous recombinant system of a Cre recombinase in the E.coli BJ5183 is utilized to complete homologous recombination of pAdTrack-CMV-NRIP1 and pAdEasy-1 in bacteria. A correct recombinant adenovirus plasmid is named as pAd-NRIP1. After digestion linearization of pAd-NRIP1 by a PacI, a liposome is transfected to a 293A cell, so as to obtain a recombinant virosome.
Owner:NORTHWEST A & F UNIV
Proliferation and tumor cell specific gene operating system for gene therapy of malignant tumor
InactiveCN101671666AMeet the characteristicsFulfil requirementsGenetic material ingredientsFermentationEucaryotic cellAbnormal tissue growth
The invention relates to the field of biotechnology and discloses a high-proliferation specific recombination eucaryotic cell promoter PCNATAI; an eucaryotic cell operating system PCNATAI-LoxP-stop-LoxP taking a PCNATAI as a core transcription initiator and a LoxP-stop-LoxP as a transcriptional repression element; and a set of general scheme for eliminating the repression effect of the LoxP-stop-LoxP to the transcription process of the PCNATAI promoter through a Cre recombinase provided by a tumor cell specific dependent model trans form and enabling the downstream exogenous tumor suppressor gene or the suicide gene to be effectively and specifically expressed in the malignant tumor cell in a tumor cell specific pattern and a proliferation specific pattern. The scheme not only can remarkably improve the tumor inhibition rate during the gene therapy of the malignant tumor or the expression efficiency of the suicide gene in the malignant tumor cell, but also can ensure the security of the gene therapy.
Owner:GENERAL HOSPITAL OF TIANJIN MEDICAL UNIV
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