255 results about "Tissue specificity" patented technology

The present invention is in the field of genetics, especially plant genetics, and provides agents capable of controlling gene expression. The present invention specifically provides sequences of naturally occurring, tissue-specifically expressed microRNAs. The invention further provides for transgenic expression constructs comprising sequences encoding said microRNAs. By incorporation of the microRNA encoding sequence the expression from said expression construct is specifically silenced in the tissue where the naturally occurring microRNA is naturally expressed. Thereby the expression profile resulting from the promoter is modulated and leakiness is reduced. The invention further provides for a method for modulating transgenic expression by incorporating sequences encoding said microRNAs into transgenic expression constructs. The compositions and methods of the invention can be used to enhance performance of agricultural relevant crops and for therapy, prophylaxis, research and diagnostics in diseases and disorders, which afflict mammalian species.

A method of altering the targeting and / or cellular uptake efficiency of an adeno-associated virus (AAV) viral vector having a capsid containing an AAV9 cell surface binding domain is described. The method involves modifying a clade F cell surface receptor which comprises a glycan having a terminal sialic acid residue and a penultimate β-galactose residue. The modification may involve retargeting the vector by temporarily functionally ablate AAV9 binding in a subset of cells, thereby redirecting the vector to another subset of cells. Alternatively, the modification may involve increasing cellular update efficiency by treating the cells with a neuraminidase to expose cell surface β-galactose. Also provided are compositions containing the AAV9 vector and a neuraminidase. Also provided is a method for purifying AAV9 using β-galactose linked to solid support. Also provided are mutant vectors which have been modified to alter their targeting specificity, including mutant AAV9 in which the galactose binding domain is mutated and AAV in which an AAV9 galactose binding domain is engineered.

The present invention provides compositions and methods for regulating expression of nucleotide sequences in a plant. Compositions may comprise a novel nucleic acid sequence for a promoter with tissue specificity and / or cytokinin. inducibility. A method for expressing a heterologous nucleotide sequence in a plant using the promoter sequence is also provided. The method comprises transforming a plant cell to contain a heterologous nucleotide sequence operably linked to the promoter of the present invention and regenerating a stably transformed plant from the transformed plant cell. Other methods provide for downregulation of cytokinin oxidase in a plant.

The invention relates to methods for treating of tumor metastasis, methods for preventing, inhibiting, and predicting tumor recurrence and tumor metastasis, and methods of preventing cancer development for one at risk of developing cancer, for one diagnosed with a benign cancer, and / or for one diagnosed with malignant cancer. The invention also relates to methods of treating angiogenesis-dependent diseases and disorders. In addition, the invention provides: (1) a method for screening for tumor / cancer derived angiogenesis and metastasis factors; (2) a method for screening for compounds that inhibit angiogenesis and metastasis; (3) a method for screening for compounds that promote anti-angiogenesis and anti-metastasis activities; (4) a method for cancer prognosis evaluation; (5) a method for predicting the tissue specificity of a metastatic cancer; (6) a method for determining likelihood of metastasis; and (7) a method for cancer prognosis evaluation by the surveillance of metastasis development.

Transgenes encoding exogenous proteins are stably integrated into embryonic stem cells and are present in the somatic tissue of transgenic or chimeric birds. The transgenes encode exogenous proteins and are expressed in any of endodermal, ectodermal, mesodermal, or extra embryonic tissue. Tissue specificity is provided by selecting the content of the transgene accordingly. Transgenic birds whose genome is comprised of trangene derived exogenous DNA express exogenous proteins with tissue specificity, and specifically express exogenous proteins in the tubular gland cells of the oviduct to concentrate exogenous proteins in egg white..

The invention relates to a kit for auxiliary diagnosis of multiple tumors by taking a micro ribonucleic acid (RNA) combination as a tumor marker, and a detection method of the kit. The invention belongs to the fields of genetic engineering and oncology. The detection method comprises the steps of (1) extracting RNA from serum; (2) carrying out polyadenylation on the 3' end of micro RNA; (3) purifying and recovering a tailing product; (4) carrying out an inverse transcription reaction on the tailing product; (5) testing the relative expression of the micro RNA by means of a fluorescent quantitative PCR (polymerase chain reaction); (6) analyzing the result of the fluorescent quantitative PCR. The kit has the characteristics of high conservative property, space-time specificity, stability, tissue specificity and the like, and plays an important role in the aspects such as disease pathogenesis research, early diagnosis, individualized treatment and prognosis; furthermore, the kit is simple to operate, convenient in material obtaining, safe and noninvasive, and is conveniently used for screening of a great deal of diseases.

The present invention provides methods for the conditional or regulated expression of a site-specific recombinase using split intein-mediated protein splicing. This enhances the temporal and tissue-specificity of trait gene expression and allows for fine tuning of expression specificity.

The present invention provides methods and DNA constructs for the genetic engineering of plant cells to produce plants which produce substantially seedless fruit in the absence of exogenous growth factors (auxins or cytokinins) and in the absence of pollination. The substantially seedless fruits produced by the methods described herein are about the size of wildtype seeded fruit (or somewhat larger) and these fruits are equal to or superior to the wildtype seeded fruit with respect to solid content and flavor. The seedless fruits of the present invention are produced in transgenic plants which contain and express auxin or cytokinin biosynthetic genes, e.g., tryptophan oxygenase or isopentenyl transferase coding sequences expressed under the regulatory control of GH3 or AGL promoter sequences directing preferential or tissue specific expression of a downstream gene in the ovaries or developing fruit.

A method of modulating reactivity of a T cell population of a mammal comprises contacting the T cell population with an immunogenic dose of an antigenic peptide having a sequence that derives from a tissue specific expressed allelic protein variant from an individual of a specific species, wherein the tissue specific expressed allelic protein is encoded by a DNA sequence containing at least one single nucleotide polymorphism (SNP) in the coding region and binds to a MHC class I protein complex inducing an immunogenic response.

The invention discloses a DNA fragment separating colony and functional checking of rice tissue special expressing promoter PD54O in plant gene engineering technical domain, which is characterized by the following: the PD54O promoter expresses in rice leaf and leaf sheath and does not express in germ and endosperm; transferring genetic rice plant can resist the invasion of borer with the expression of PD54O regulate and control insect-resisting gene; it does not express Bt protein in seeds of food.

The invention relates to a primary separation and culture method of human amniotic mesenchymal stem cells. The primary separation and culture method of the human amniotic mesenchymal stem cells comprises the following steps of: providing a human amniotic tissue, washing with PBS (phosphate buffer saline), shearing into pieces, adding 0.1-0.3% (by mass) trypsinase to digest, adding I-type collagenase and basal high-glucose DMEM until the final concentration of the I-type collagenase is 0.1-0.2%, digesting, separating the digested human amniotic tissue centrifugally to obtain a precipitate, resuspending the precipitate with PBS, filtering, separating centrifugally, and removing the supernatant to obtain the human amniotic mesenchymal stem cells. Compared with the prior art, the primary separation and culture method provided by the invention has the advantages that because a small amount of trypsinase is used to pretreat and loosen the human amniotic tissue, and further the I-type collagenase with good tissue specificity is used to treat the human amniotic tissue, the digesting time can be shortened greatly, the primary separation steps can be simplified, the human amniotic mesenchymal stem cells can be obtained at a high yield, and the viability of the obtained human amniotic mesenchymal stem cells can be improved greatly compared with that of the human amniotic mesenchymal stem cells in the prior art.

The invention discloses HGG (Human Gammaglobulin) polypeptide in combination with the tissue specificity of cerebral arterial thrombosis. The invention relates to a method for obtaining the polypeptide. The method comprises the following steps: carrying out in-vivo selection of a mouse MCAO (Middle Cerebral Artery Occlusion) cerebral arterial thrombosis model by adopting an in-vivo phage display peptide library screening technology so as to obtain phage clones in combination with cerebral arterial thrombosis tissue; and randomly selecting the plurality of phage clones to sequence, and authenticating the in-vivo combination specificity of HGG peptide and coded phage clones HGG-M13 thereof. The invention further relates to application of the polypeptide in preparation of a high-sensitivity imaging molecular probe and a targeting delivery neuroprotective drug for cerebral stroke. The polypeptide can be synthesized through an artificial method; the polypeptide is low in molecular weight, high in activity and penetrating power, good in specificity and low in toxicity, and has good tissue targeting of cerebral arterial thrombosis in vivo; and therefore, the polypeptide is applicable to serving as a carrier of the high-sensitivity imaging molecular probe and the targeting delivery neuroprotective drug.

Embodiments disclosed herein are directed to engineered CRISPR-Cas effector proteins that comprise at least one modification compared to an unmodified CRISPR-Cas effector protein that enhances bindingof the of the CRISPR complex to the binding site and / or alters editing preference as compared to wild type. In certain example embodiments, the CRISPR-Cas effector proteinis a Type V effector protein. In certain other example embodiments, the Type V effector protein is Cpfl. Embodiments disclosed herein are directed to viral vectors for delivery of CRISPR-Cas effector proteins, including Cpfl. Incertain example embodiments, the vectors are designed so as to allow packaging of the CRISPR-Cas effector protein within a single vector. There is also an increased interest in the design of compactpromoters for packing and thus expressing larger transgenes for targeted delivery and tissue-specificity. Thus, in another aspect certain embodiments disclosed herein are directed to delivery vectors,constructs, and methods of delivering larger genes for systemic delivery.

The invention relates to the technical field of identification of animal species and animal-derived components, in particular to a method for detecting a goose-derived component and a primer for detecting a nucleotide sequence of goose cell mitochondria, which aim to identify whether the goose-derived component is contained in products such as feeds, foods and the like or not. Due to the design of a specific amplification primer, mitochondrion deoxyribonucleic acid (DNA) which is independent of one another genetically, does not have repeated sequences and does not have tissue specificity in a biological individual is detected by using a polymerase chain reaction (PCR) technology, and a PCR detection method for the goose-derived component is established, so that the aim of quickly and accurately detecting and identifying the goose-derived component is fulfilled.

The invention discloses a new cartilaginous affinity polypeptide sequence and a screening method thereof. In the invention, according to an improved phage display technique, a cell and tissue layers combined extracorporeal screening method is applied to cartilaginous affinity polypeptide screening for the first time so as to screen out the polypeptide sequence DWRVIIPPRPSA with chondrocyte affinity and tissue specificity, and thus, the drawback of simple cell screening or tissue screening in the prior art is overcome, and the cellular affinity and the tissue specificity are well combined. The invention also relates to the application of the polypeptide in the preparation of a targeted PEI nano-carrier for the gene therapy of mediated articular cartilage diseases, which realize the decoration on the PEI carrier by the cartilaginous affinity polypeptide, offers the cartilaginous tissue specificity and the cellular affinity to the carrier, and realizes the targeted therapy to the cartilage. In addition, the invention takes the chondrocyte itself as the screening target, which has better targeted effect and clinical practical value compared with the mode of taking the matrixes around the chondrocyte as the screening target in the prior art.

Transgenes encoding exogenous proteins are stably integrated into embryonic stem cells and are present in the somatic tissue of transgenic or chimeric birds. The transgenes encode exogenous proteins and are expressed in any of endodermal, ectodermal, mesodermal, or extra embryonic tissue. Tissue specificity is provided by selecting the content of the transgene accordingly. Transgenic birds whose genome is comprised of trangene derived exogenous DNA express exogenous proteins with tissue specificity, and specifically express exogenous proteins in the tubular gland cells of the oviduct to concentrate exogenous proteins in egg white.

The invention discloses a Phytophthora nicotianae molecule detection primer and a detection method thereof, specially used for the specific molecule detection of Phytophthora nicotianae. A pair of specific primers of the Phytophthora nicotianae (comprising an upstream primer YhF:5'-GACATGATATCAACTGTTCTGCAG-3' and a downstream primer YhR:5'-CCTTGGATCTTCTCTCGATAAG-3') are mainly designed, and an amplified product having a fragment length of 342bp can be specially amplified on the pure DNA and bacteria bearing pathogenic tissues of the Phytophthora nicotianae through PCR amplification and agarose gel electrophoresis. The primer and the method can be used for the rapid, sensitive and specific detection of the Phytophthora nicotianae in Phytophthora nicotianae infected plant tissues in the production practices, can be used for the early stage diagnosis of field diseases and the monitoring and identification of pathogens, and provide reliable technologic and theoretic bases for the control of diseases caused by the Phytophthora nicotianae.

The invention discloses a tissue-specific gene and regulatory factor data storage method. In the method, data storage is realized by establishing a tissue-specific gene and regulatory factor database comprising a tissue bank, a gene bank, a gene reference name bank, a tissue-specific gene bank and the tissue bank of tissue-specific genes. The method comprises the following steps of: extracting the tissue-specific genes from a Pubmed bibliographic database in a literature mining form; adding extracted tissue information into the tissue bank; retrieving information about the genes in the European Molecular Biology Laboratory (EMBL), Genebank and NCBI by utilizing names of the genes, and adding the information into corresponding items of the gene bank; and generating regulatory factor XML files by utilizing the information of regulating the searching of the genes from Transfac, an Eukaryotic Promoter Database (EPD) and a compel database. Compared with the prior art, the method has the advantages of bringing convenience to researchers utilizing modern computing technology to detect gene expression and regulate an inherent mechanism of network tissue specificity to acquire data on sequences of the tissue-specific genes and corresponding regulatory factors, fully utilizing tissue-specific gene analysis tools and improving research quality and efficiency.

The invention discloses a gene PgPDR3 (panax ginseng pleiotropic drug resistance) related to promotion of transport and accumulation of ginsenosides, as well as an encoding protein and an application of the gene PgPDR3. A sequence of the PgPDR3 gene related to the transport and the accumulation of the ginsenosides is shown as SEQ ID No. (sequence identification number) 1; and the sequence of the encoding protein of the PgPDR3 gene is shown as SEQ ID No. 2. The research finds that PgPDR3 gene expression has tissue specificity and is closely related to the accumulation of the ginsenosides. The PgPDR3 gene has significant effects of promoting synthesis, the transport and the accumulation of the ginsenosides. Panax ginseng or other plants can be screened or improved through the PgPDR3 gene or derivatives of the PgPDR2 gene to obtain excellent plant varieties with high ginsenoside content. Also, panax ginseng transgenic cells or plants can be adopted to produce ginsenoside monomers such as protopanaxadiol, Rb, Re, Rh2, Rg2 and Rg3.

The invention discloses an HDT702 promoter and application thereof. The HDT702 promoter is obtained from cloning of rice, and the nucleotide sequence of the HDT702 promoter is shown in SEQ ID NO.1. The promoter is a tissue specificity promoter and can promote the specific expression of downstream genes in anther of rice. The HDT702 promoter is applied into the transgenic engineering, so that an expression product of target genes is specifically accumulated in the anther, and the local expression amount is increased; and meanwhile, unnecessary waste of plant nutrients can be avoided, and therefore good application prospects can be achieved in the transgenic engineering.

The invention discloses a method for positioning immune tissues of growth hormone for malus plants and application thereof. The method for positioning immune tissues of growth hormone for malus plants comprises the following steps of: (1) fixing plant tissues to obtain fixed plant tissues; (2) carrying out slice making on the fixed plant tissues on the basis of the step (1) to obtain a plant tissue slice; and (3) immunostaining the obtained plant tissue slice on the basis of the step (2), and determining the distribution condition of hormone in the plant tissues through observing a position of a positive signal. The method for positioning immune tissues of growth hormone for malus plants can eliminate the easily caused influence of nonspecific staining of woody plant tissues, and can identify the positive signal clearly. The method for positioning immune tissues of growth hormone for malus plants verifies that the growth hormone has tissue specificity when being distributed in the tissues of a stem tip or a root tip of an apple tree in a condition of iron deficiency.

The present invention relates to a method to produce proteins reduced in high mannose type glycans in a plant or plant cell by partially inhibiting the expression of the Alg3 gene in said plant or plant cell. Said partial inhibition can be provided for by inserting the Alg3 mutant gene from Arabidopsis as derived from the plant line Salk_040296c or by partially inhibiting the endogenous Alg3 gene by providing the plant or plant cell either with an antisense expression, a sense co-suppressing or with an RNA inhibition genetic construct. Optionally also tissue-specific expression of said inhibiting constructs can yield partial inhibition in a plant.

The invention discloses a rice histone deacetylases gene HDT701 promoter and an application thereof. The sequence of the promoter is one of the following nucleotide sequences: (a) the nucleotide sequence shown in the sequence table SEQ ID NO.1; (b) the nucleotide sequence which can be hybridized with a DNA sequence of 1) under rigorous conditions and has same function; (c) the nucleotide sequencewhich has more than 90% homology with the DNA sequence of a) or b) and also has the function of the promoter. According to the invention, the promoter of the HDT701 gene is cloned from the rice, wherein the cloned promoter is the rice histone deacetylases gene HDT701 promoter which can promote the expression of downstream gene in some organs of the rice, and the rice histone deacetylases gene HDT701 promoter is a tissue specificity promoter, so that the promoter can be used in the transgenic engineering, the expression products of the target gene can be accumulated at certain organ or tissue so as to increase local expression quantity, and simultaneously, unnecessary waste of plant nutrient can be reduced, consequently, the promoter has good application prospect in the transgenic engineering.

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.

The invention provides a molecular marker Marker Sex 1 and an identification method for quickly identifying genetic sex of portunus trituberculatus, wherein the Marker Sex 1 has the nucleotide sequence represented as the SEQ ID No.1. The identification method includes steps of: extracting genome DNA from muscle tissue of the portunus trituberculatus; with the genome DNA as a template, performing aPCR amplification reaction; purifying and sequencing the PCR amplification product; comparing the sequencing result with the DNA sequence of the molecular marker, and determining male if double peakexists or female if single peak exists. The identification method is simple and quick in operation and is low in demand on the sample, has high identification accuracy, is free of influence due to tissue specificity and environment, and has important effect for establishing all-female or high-female-ratio larval breeding technologies.

The present invention relates to a novel SSD (sterol-sensing domain)-containing protein derived from human liver, human testis and human brain, or a salt thereof, and a DNA encoding the same. Studies on the tissue-specificity of the protein expression, the expression change depending the intracellular cholesterol level, production of the transformant, and the site-specific expression in brain regions of a patient with Alzheimer's disease are disclosed.

A novel gene 282P1G3 and its encoded protein, and variants thereof, are described wherein 282P1G3 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, 282P1G3 provides a diagnostic, prognostic, prophylactic and / or therapeutic target for cancer. The 282P1G3 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with 282P1G3 can be used in active or passive immunization.

The invention discloses a drought induced rice flower-specific promoter and application thereof. The promoter has a nucleotide sequence shown in SEQ ID No.1, or a nucleotide sequence which can be hybridized with the sequence under highly rigorous conditions and has same functions. The promoter has flower tissue specificity and shows certain inductivity under drought induction conditions. By constructing a plant expression vector containing the promoter, the promoter is transformed into transgenic rice, the GUS histochemical staining and the RT-PCR detection are performed to a plurality of different tissues of a transgenic material such as ordinary leaves, sword-like leaves, flowers and so on under the drought induction conditions and the result proves the expression of a driving gene of the promoter in a rice flower tissue under the drought induction. The cloning of the promoter has greater practical significance on the research of male sterile strains of rice, and can be used for creating sterile lines of the rice and other plants and maintaining line-double-lines.