119 results about "Transcription control" patented technology

The invention relates to a mammal cell high-efficiency expression vector pSNEO. The vector is constructed on the basis of neomycin resistance screening gene NEO by combined strategy of weakening screening gene expression and reinforcing target gene expression. The screening gene weakening comprises the following two sides: introducing deletion mutant into the promoter to implement transcription weakening of the screening gene, and introducing a hairpin structure sequence before the translation initial site of the screening gene to implement the translation weakening of the screening gene. The expression reinforcement of the target gene is implemented by adding a transcription control element WPRE sequence between polyclone site and polyA tail of the target gene expression frame. The pSNEO vector can conveniently and quickly complete the construction of the stable high-expression cell strain of the target gene, and provides a new tool for preparing the high-polymer recombinant protein.

A system and device are provided which include a gene regulatory system controlling expression of one or more expression cassettes present in or released by the device, by emitting one or more stimulations. An expression cassette includes a regulatable transcription control element that is responsive to the emitted stimulations linked to an open reading frame of interest. The system optionally includes a sensor to sense a parameter indicative of a need, a telemetry module to receive an external command, or a programmable device, for regulating gene expression of the open reading frame.

The invention relates to novel mammalian perixosome proliferator-activated receptor (PPAR) poplypeptides and their use. In a particular embodiment, PPAR polypeptides with mutations in the P-box domain possess advantageous properties as transcriptional activators for PPRE-bearing expression vectors and expression systems. The invention includes PPAR polypeptides, nucleic acids encoding them, expression systems, vectors, and methods for inducibly expressing a gene of interest. The methods and expression systems of the invetion provide improved dose-response or inducibility characteristics, improved and/or altered effects on cellular PPAR function, and/or improved transcriptional control. The selection of a homologous PPAR polypeptide to prepare the novel PPAR polypeptide of the invetion for a cell or tissue also improves the immune reaction side effect potential for particular uses.

This invention provides a system for producing differentiated cells from a stem cell population for use wherever a relatively homogenous cell population is desirable. The cells contain an effector gene under control of a transcriptional control element (such as the TERT promoter) that causes the gene to be expressed in relatively undifferentiated cells in the population. Expression of the effector gene results in expression of a cell-surface antigen that can be used to deplete the undifferentiated cells. Model effector sequences encode glycosyl transferases that synthesize carbohydrate xenoantigen or alloantigen, which can be used for immunoseparation or as a target for complement-mediated lysis. The differentiated cell populations produced are suitable for use in tissue regeneration and non-therapeutic applications such as drug screening.

The invention provides a catheter for optical ablation of tissue in a living body, the catheter including: a distal end; a proximal end; an elongate catheter body coupled between the distal end and the proximal end; a light emission device at the distal end and configured to emit an ablation light having characteristics selected to regulate an optically regulatable transcription control element operably linked to a nucleic acid sequence for a gene product, the expression of which gene product in cells directly or indirectly kills cells; and a projection control mechanism coupled to the light emission device and configured to control an effectively illuminated area where the optically regulatable transcription control element is effectively regulatable by the ablation light projected from the light emission device. Also provided is a system which includes the catheter, and methods to prevent, inhibit or treat AF which employ an expression cassette and/or one or more selected wavelengths of light.

The invention discloses a construction method of a genetic engineering strain for producing shikimic acid. The method comprises the following steps of: 1, constructing an escherichia coli strain of which the aroA gene is knocked out; 2, constructing a recombinant expression plasmid pAR63 containing key enzyme genes aroGFBR, aroE, aroB, aroD, tktA and ppsA in the metabolic pathway of the shikimic acid, so that the genes are subjected to transcriptional control of a tryptophan promoter Ptrp; and 3, transferring the recombinant expression plasmid pAR63 into the escherichia coli strain of which the aroA gene is knocked out to obtain a production strain for expressing the shikimic acid. In the method, the aim of interrupting the metabolism of the shikimic acid is fulfilled by the knock-out of the single gene aroA, a small number of genes are knocked out, the operating difficulty is low, and the expression of the genes is in the state of starting and stopping automatically and is started automatically in the middle and late period without the induction of inducers, so the possibility of adding toxic substances into a culture medium is reduced, and the shikimic acid has high yield.

According to the present invention, a DNA construct of interest is assembled from overlapping subfragments via an acceptor module which comprises the distal end of the construct at a position downstream from a promoter. The construct is assembled distal to proximal via homologous recombination events occurring in the span between that distal end of the construct and the upstream end of the promoter. These recombination events occur iteratively between the acceptor module and alternative donor modules. Successful recombination places one of at least two marker genes under the transcriptional control of an active form of the promoter. As a result of alternating use of two varieties of donor modules, as few as two selection markers may be used to produce a complex DNA construct.

Nucleic acid expression control sequence cassettes and vectors containing the same are provided for use in making abundant quantities of recombinant polypeptides of interest. The modified transcriptional control sequences, which include a T5 promoter sequence, are highly stable and can be used in a variety of vectors, such as plasmids.

The invention provides adenoviral vectors (preferably replication competent) comprising both an E3 sequence and at least one adenoviral gene under transcriptional control of a target cell-specific transcriptional response element. These vectors display significantly improved cytotoxicity, which is especially useful in the cancer context, in which selective destruction of target cells is desirable. The invention further provides host cells comprising the vectors. The invention further provides methods of using the adenoviral vectors.

A DNA vector comprises a first DNA sequence which is complementary to at least part of an alphavirus RNA genome and having the complement of complete alphavirus DNA genome replication regions, and a second DNA sequence encoding a paramyxovirus protein, particularly a respiratory syncytial virus fusion (RSV F) protein or a RSV F protein fragment that generates antibodies that specifically react with RSV F protein, the first and second DNA sequences being under the transcriptional control of a promoter, preferably a cytomegalovirus promoter, which may include Intron A. Such vectors also contain a further nucleotide sequence located between the promoter sequence and the alphavirus sequence to enhance the immunoprotective ability of the RSV F protein when expressed in vivo. Such DNA vectors may be used to immunize a host against disease caused by infection with RSV or other paramyxovirus, including a human host, by administration thereto, and may be formulated as immunogenic compositions with pharmaceutically-acceptable carriers for such purposes. Such vectors also may be used to produce antibodies for detection of RSV or other paramyxovirus infection in a sample.

This invention identifies tumor senescence genes induced by treatment with cytotoxic agents. The invention provides reagents and methods for identifying compounds that induce expression of these cellular genes and produce cellular senescence, particularly senescence in tumor cells. The invention also provides reagents that are recombinant mammalian cells containing recombinant expression constructs that express a reporter gene under the transcriptional control of a promoter for a gene the expression of which is modulated in senescent cells, and methods for using such cells to identify compounds that modulate expression of these cellular genes.

Proteins that interact with c-Fos, nucleic acids encoding them and inhibitors utilizing them as well as methods for detecting an interaction and screening methods utilizing a protein that interacts with c-Fos are provided. Comprehensive analysis of transcription control factor complexes in a mouse brain cDNA library with c-Fos as a bait by using the cotranslation selection and screening of in vitro virus (IVV) and the C-terminal labeling method are conducted, thereby to analyze proteins unknown so far, proteins known so far, but unknown to form a complex with the c-Fos protein, and so forth.