99 results about "Adenovirus genome" patented technology

In vitro methods for making a recombinant adenoviral genome, as well as kits for practicing the same and the recombinant adenovirus vectors produced thereby, are provided. In the subject methods, the subject genomes are prepared from first and second vectors. The first vector includes an adenoviral genome having an E region deletion and three different, non-adenoviral restriction endonuclease sites located in the E region. The second vector is a shuttle vector and includes an insertion nucleic acid flanked by two of the three different non-adenoviral restriction endonucleases sites present in the first vector. Cleavage products are prepared from the first and second vectors using the appropriate restriction endonucleases. The resultant cleavage products are then ligated to produce the subject recombinant adenovirus genome. The subject adenoviral genomes find use in a variety of application, including as vectors for use in a variety of applications, including gene therapy.

A recombinant hybrid virus, including: (a) a deleted adenovirus vector genome comprising the adenovirus 5′ and 3′ cis-elements for viral replication and encapsidation, and further comprising a deletion in an adenovirus genomic region selected from the group consisting of: (i) the polymerase region, wherein said deletion essentially prevents the expression of a functional polymerase protein from said deleted region and said hybrid virus does not otherwise express a functional polymerase protein, (ii) the preterminal protein region, wherein said deletion essentially prevents the expression of a functional preterminal protein from said deleted region, and said hybrid virus does not otherwise express a functional preterminal protein, and (iii) both the regions of (i) and (ii); and (b) a recombinant adeno-associated virus (AAV) vector genome flanked by the adenovirus vector genome sequences of (a), said recombinant AAV vector genome comprising (i) AAV 5′ and 3′ inverted terminal repeats, (ii) an AAV packaging sequence, and (iii) a heterologous nucleic acid sequence, wherein said heterologous nucleic acid sequence is flanked by the 5′ and the 3′ AAV inverted terminal repeats of (i). Methods of making and using the recombinant hybrid virus are also disclosed.

Site-specific recombinase based methods for making a recombinant adenoviral genome, as well as kits for practicing the same and the recombinant adenovirus vectors produced thereby, are provided. In the subject methods, the subject genomes are prepared from donor and acceptor vectors that each include at least one site recombinase recognition site, where in certain preferred embodiments, one of the donor and acceptor vectors includes a single recombinase recognition site while the other includes two recombinase recognition sites. The acceptor vector includes an adenoviral genome having an E region deletion. The donor vector includes an insertion nucleic acid. In the subject methods, the donor and acceptor vectors are combined in the presence of a recombinase to produce an adenoviral genome that includes the insertion nucleic acid. The subject adenoviral genomes find use in a variety of applications, including as vectors for use in a variety of applications.

The invention provides adenoviral vectors comprising an adenoviral genome comprising heterologous antigen-encoding nucleic acid sequences, such as Plasmodium nucleic acid sequences, operably linked to promoters. The invention further provides a method of inducing an immune response against malaria in a mammal comprising administering the adenoviral vectors to the mammal.

A helper dependent adenoviral vector system is provided. The subject helper dependent adenoviral vector system is made up of: (1) a "gutless" adenoviral vector that include cis-acting human stuffer DNA that provides for in vivo long term, high level expression of a coding sequence present on the vector; (2) an adenoviral helper vector that is characterized by having an adenoviral genome region flanked by recombinase recognition sites, where the helper vectors further include a non-mammalian endonuclease recognition site positioned outside of the adenoviral genome region; and (3) a mammalian cell that expresses the corresponding recombinase and endonuclease, as well as the adenoviral preterminal and polymerase proteins. Also provided are methods of using the subject systems to produce virions having the subject helper dependent adenoviral vectors encapsulated in an adenoviral capsid. In addition, kits for use in practicing the subject methods are provided.

The invention discloses a D24 fiber protein modified conditionally replicating adenovirus carrier with an exogenous gene by a one-step method and an application of the carrier. on the basis of an Ad56 D24 conditionally replicating adenovirus carrier, the construction efficiency of the carrier for inserting into the exogenous gene can be improved by two aspects: (1) a BamHi locus on an adenovirus gene group is mutated; and (2) BamHi and SfuI are introduced between fiber and E4 by a homologous recombination method so as to introduce the exogenous gene into the adenovirus gene group in one step by an enzyme digestion ligation method. The obtained D24 fiber protein modified conditionally replicating adenovirus carrier with an exogenous gene is subjected to the pesticide effect experiment to prove that the D24 fiber protein modified conditionally replicating adenovirus carrier with an exogenous gene can improve a treatment effect on turmor.

A helper dependent adenoviral vector system is provided. The subject helper dependent adenoviral vector system is made up of: (1) a "gutless" adenoviral vector, which in certain embodiments includes cis-acting human stuffer DNA that provides for in vivo long term, high level expression of a coding sequence present on the vector, where in certain embodiments the vector includes an integrating domain; (2) an adenoviral helper vector that is characterized by having an adenoviral genome region flanked by recombinase recognition sites, where the helper vectors further include a non-mammalian endonuclease recognition site positioned outside of the adenoviral genome region and in certain embodiments a third adenoviral inverted terminal repeat (ITR) sequence positioned between first and second terminal ITRs; and (3) a mammalian cell that expresses the corresponding recombinase and endonuclease, as well as the adenoviral preterminal and polymerase proteins. Also provided are methods of using the subject systems to produce virions having the subject helper dependent adenoviral vectors encapsulated in an adenoviral capsid. In addition, kits for use in practicing the subject methods are provided.

The invention provides recombinant adenovirus, comprising: using a mammal preference codon table to optimize and synthesize the gene of chloride ion channel toxin (BmK CT) of the scorpion; cloning to a intermediate vector of the adenovirus to obtain a recombinant plasmid pShuttle-IRES-hrGFP-2-BmK CT comprising the toxin gene; transforming the recombinant plasmid to the escherichia coli BJ5183 having the adenovirus skeleton genome, obtaining pAdEasy-1-BmK CT after homologous recombination; transfecting the adenovirus genome to the AD293 cell, obtaining the recombinant adenovirus particles AdEasy-1-BmK CT containing the gene of chloride ion channel toxin of the scorpion. The chloride ion channel toxin can inhibit the glioma; with the adenovirus as the carrier, the infection efficiency and the action time of the glioma are improved; the recombinant adenovirus has good application prospect in the gene treatment aspect of the glioma.

The object of the present invention is to provide a novel conditionally replicating adenovirus and a reagent comprising the same for cancer cell detection or for cancer diagnosis.

The present invention provides a polynucleotide, which comprises human telomerase reverse transcriptase (hTERT) promoter, E1A gene, IRES sequence and E1B gene in this order and which comprises a target sequence of a first miRNA. The present invention also provides a recombinant adenovirus, which comprises a replication cassette comprising the above polynucleotide, wherein the replication cassette is integrated into the E1 region of the adenovirus genome.

The invention discloses a recombinant adenovirus and tetravalent adenovirus vaccine and a preparation method thereof. The tetravalent recombinant adenovirus vaccine contains a recombinant type 3 adenovirus strain, a recombinant type 7 adenovirus strain, a recombinant type 14 adenovirus strain and a recombinant type 55 adenovirus strain. The preparation method disclosed by the invention comprises the following steps: preparing recombinant shuttle plasmids containing hexon gene segments, and performing in-bacteria homologous recombination with a recombinant human type 3 adenovirus strain, thereby obtaining a recombinant adenoviral genome in which the hexon gene segments are replaced by type 7, type 14 and type 55; transfecting cells, rescuing to obtain recombinant human type 3, 7, 14 and 55 recombinant adenoviruses with different main capsid protein-hexon proteins; purifying, mixing according to the same protein content, and inactivating by using beta-propiolactone, thereby obtaining the tetravalent adenovirus vaccine. The tetravalent adenovirus vaccine is capable of inducing neutralizing antibody responses to four types of serotype adenoviruses, and the neutralizing titer is 500-1000.

The present invention discloses adenoviral vectors, including mutant adenoviruses. The E3 region of the adenoviral vectors contains restriction sites that can partially or completely delete the region, or a selection gene contained therein, and if necessary, replaces the outer Compositions and methods of source genes that will exhibit an expression pattern similar in timing and degree of expression to the endogenous adenoviral gene it replaces, and further optionally including the adenoviral For mutations in other parts of the genome, including the E1B or E1A regions, the adenoviral vectors can be used in the diagnosis or treatment of diseases, preferably diseases involving excess cell growth, including cancer.

The invention discloses a dynein mosaic type recombinant human type-B adenovirus and a preparation method thereof. The skeleton of the dynein mosaic type recombinant human type-B adenovirus is a human type-B adenovirus genome, and a base sequence which encodes a receptor binding domain of dynein is a base sequence which encodes a corresponding domain of a human type-C adenovirus. By a molecular cloning method, Ad5-knob gene fragments are cloned and replaced to recombinant shuttle plasmids, in-vitro recombinant on the Ad5-knob gene fragments and a recombinant human type-3 adenovirus genome is realized, obtained knob gene fragments are replaced into type-5 recombinant human type-3 adenovirus genome, and therefore, dynein mosaic type recombinant human type-3 adenovirus rAd3-FK5 is obtained. The dynein mosaic type recombinant human type-3 adenovirus rAd3-FK5 can be infected with mouse primitive epithelial cells and golden hamster lung and kidney primitive cells in vitro, and the infection efficiency of the dynein mosaic type recombinant human type-3 adenovirus rAd3-FK5 is close to that of Ad5, and is much higher than that of a parent strain rAd3E, in golden hamster cells, significant copying exists, and the dynein mosaic type recombinant human type-B adenovirus can be used for small animal model research of human type-3 adenovirus vaccines and antiviral drug evaluation.

The invention provides cells and methods of using the cells for the propagation of replication-deficient adenoviral vectors. The cells comprise at least one heterologous nucleic acid sequence which upon expression produces at least one non-adenoviral gene product that complements in trans for a deficiency in at least one essential gene function of one or more regions of an adenoviral genome so as to propagate a replication-deficient adenoviral vector comprising an adenoviral genome deficient in the at least one essential gene function of the one or more regions when present in the cell.

The invention discloses a recombinant denovirus for expressing foot-and-mouth disease virus type A empty capsid, and application thereof. A sub-genome for coding the foot-and-mouth disease virus type A empty capsid, which is shown as SEQIDNo.1, and a denovirus shuttle plasmid are operably connected to form a recombinant denovirus shuttle expression vector; the recombinant denovirus shuttle expression vector and a denovirus backbone vector plasmid co-transform Escherichia coli, and a cloned recombinant denovirus genome existing in a plasmid form is obtained; and the cloned recombinant denovirus genome is linearized and transfects cells, and the replication-deficient recombinant denovirus is obtained. The replication-deficient recombinant denovirus has high toxicity titer, and can form the foot-and-mouth disease virus type A empty capsid in the replication process and stably express foot-and-mouth disease virus empty capsid in the virus propagation process; the expressed foot-and-mouth disease virus empty capsid can constantly induce high-level neutralizing antibody in bodies of mice and resist the attack of the foot-and-mouth disease virus; and the recombinant denovirus can be prepared into a vaccine for controlling foot-and-mouth disease.

The present disclosure relates to a method of making an adenovirus plasmid comprising a part or all of an adenovirus genome and one or more original restriction sites allowing rapid and flexible manipulation of the adenovirus genome, and methods of preparing adenovirus constructs, for example comprising a transgene. The disclosure also extends to novel intermediates employed in and generated by the method, to plasmids and shuttle vectors of the method and to adenoviruses or adenoviral vectors obtainable from the plasmid and/or method. The disclosure further relates to use of the viruses or vectors, for example obtained from a method disclosed herein, in therapy, such as use in the treatment of cancer.

Disclosed is a new system for generating recombinant adenovirus vectors and adenovirus-based expression libraries, by positive selection of recombinants deleted for the endogenous protease gene, which gene is expressibly cloned into another region of the adenoviral genome. In a preferred embodiment, the invention allows positive selection of E1-deleted, protease-deleted recombinant adenovirus vectors comprising an exogenous gene or an expressible piece of exogenous DNA, by providing an expression cassette comprising the protease gene and the exogenous DNA inserted in place of E1 region in a shuttle vector. In vivo recombination of the shuttle vector with a protease-deleted adenoviral genome in suitable non-complementing cells generates viable recombinants only when rescuing the protease cloned in E1 region. Non-recombinant viral genomes are not able to grow due to the deletion of the protease gene, ensuring that only recombinant viral plaques are generated. This positive selection can be used for the generation of a large number of high purity recombinant adenovirus vectors and allows generation of adenovirus-based libraries with diversity exceeding 10⁶ clones.

Adenoviral vectors, including mutant adenoviruses, that have restriction sites in the E3 region, that facilitate its partial or total deletion, or select genes contained therein, and optionally compositions and methods for substituting heterologous gene(s) in the partially or totally deleted E3 region(s), which heterologous gene(s) being operably linked to endogenous adenoviral transcriptional control sequences will exhibit an expression pattern, both in terms of timing and degree of expression, similar to the endogenous adenoviral gene(s) that it replaces, and further optionally including mutations in other parts of the adenoviral genome, including certain E1B or E1A regions, and that have applications for diagnosing or treating disease, preferably disease involving unwanted cell growth, including cancer.

The invention discloses a replicative recombinant human 55-type Adenovirus vector and a preparation method and application thereof. A human 55-type Adenovirus genome is cyclized through homologous recombination technology, E3 genes of Ad55 are knocked out through homologous recombination and double resistance screening technology, and an exogenous gene expression cassette can be integrated in; after Ad55 vector plasmids deleted in the E3 genes are linearized, successful rescue and mass production can be realized by transfecting mammalian cells; further, a purified recombinant Ad55 vector is obtained through density gradient centrifugation, efficient expression in target cells can be realized by using the vector to carry exogenous genes, and activity of exogenous reporter genes can reflect growth characteristics of virus. The replicative recombinant vector based on human Ad55 can be potentially applied to research and development of vaccines resistant to human 55-type Adenovirus, screening of drug and neutralizing antibodies resistant to the human 55-type Adenovirus, research and development of vaccines resistant to other pathogens and development of report tracer systems for biological study.