69 results about "Intracellular transport" patented technology

The present invention relates to the compositions, methods, and applications of a novel approach to selective cellular targeting. The purpose of this invention is to enable the selective delivery and/or selective activation of effector molecules to target cells for diagnostic or therapeutic purposes. The present invention relates to multi-functional prodrugs or targeting vehicles wherein each functionality is capable of enhancing targeting selectivity, affinity, intracellular transport, activation or detoxification. The present invention also relates to ultra-low dose, multiple target, multiple drug chemotherapy and targeted immunotherapy for cancer treatment.

A system and method for transdermally delivering a biologically active agent comprising one or more electrodes having stratum corneum-piercing projections and a circuit that delivers an electrical signal to the electrodes to electroporate a cell membrane. Preferably, the system is configured to generate homogeneous electrical fields and, more preferably, to generate spherically or semispherically symmetrical electric fields. Methods of the invention include applying a first electric signal to facilitate transdermal transport of the agent and applying a second electric signal to facilitate intracellular transport of the agent.

The invention discloses a preparation method and application of a carbon nanomaterial-immunostimulatory sequence compound. The preparation method comprises the steps of (1) modifying a carbon nanomaterial through polylysine to obtain a polylysine-modified carbon nanomaterial; and (2) mixing the polylysine-modified carbon nanomaterial obtained from the step (1) with an immunostimulatory sequence in a water solution, oscillating for 0.5-3 hours at 20-37 DEG C, and centrifuging, collecting and depositing to obtain the carbon nanomaterial-immunostimulatory sequence compound. According to the carbon nanomaterial-immunostimulatory sequence compound, the carbon nanomaterial serves as a carrier for intracellular transport of the immunostimulatory sequence (CpG DNA), so as to remarkably improve the cellular uptake efficiency of the CpG DNA, protect the CpG DNA from being degraded by nuclease and enhance the immunocompetence of an organism for a long time, so the carbon nanomaterial-immunostimulatory sequence compound has a good medical application prospect.

The invention discloses construction and application methods of escherichia coli with a high yield of producing N-acetylglucosamine, and belongs to the technical field of genetic engineering. According to the construction and application methods disclosed by the invention, the decomposition and the intracellular transport pathways of N-acetylglucosamine and the by-products thereof are blocked by modifying and transforming the existing metabolic pathway of escherichia coli, meanwhile, an exogenous glucosamine acetylase gene is introduced, a complete synthesis pathway from glucose to N-acetylglucosamine is formed in a host, the constructed engineering strain is capable of utilizing glucose or glycerol as a substrate for synthesising N-acetylglucosamine through aerobic fermentation culture, so as to realize industrialized production.

By adding the novel developed modular antigen transporter molecules (MAT molecules) and other instruments related thereto, the immune system of an individual can be effectively modulated in a targeted manner. The MAT molecules contain a translocation module which transports the MAT molecule inside the cell, an active intracellular targeting molecule resulting in intracellular transport of the MAT molecule to the organelles of the cell which are responsible for antigen processing and an antigen module which determines the specificity of the immune response modulated by the MAT molecule. Optionally, other modules such as tag modules or spacer modules can be contained in the MAT molecule. The invention comprises the inventive MAT molecules, antibodies which are produced using said MAT molecules and therapeutic agents and diagnostic reagents which are produced with MAT molecules. The invention also comprises applications containing said MAT molecules, antibodies, therapeutic agents and diagnostic reagents.

The invention provides a [12] aneN3 cationic lipid containing a targeted group and a fluorescent group and a transgenic vector containing the same. The invention also discloses preparation methods of the cationic lipid and the transgenic vector. The cationic lipid provided by the invention contains the targeted group cholic acid and the fluorescent group naphthalimide simultaneously; the transgenic vector formed by the cationic lipid has lower cytotoxicity, has a certain targeting property on hepatoma cells, not only can monitor intracellular transport and release of vector/DNA complexes in a same cell but also has a certain selectivity on the hepatoma cells to promote the development of gene therapy, and also has higher transfection efficiency; the preparation methods of the cationic lipid and the transgenic vector are simple, mature, and easy to control.

The invention discloses a composition for regulating the sub-health status of the crowd suffering from lipodystrophy. The composition mainly has the effects of reducing the expression of the hypothalamic neuropeptide gamma by influencing human leptin, improving the energy metabolism efficiency, increasing the energy consumption and inhibiting fat synthesis. The other components with fat decomposing effects are combined, so that the metabolism of human adipose tissues is promoted, and the intracellular oxidative phosphorylation effect and synthesis of cell endogenous cholesterol are inhibited. The composition can be used for achieving the effects of effectively infiltrating into the human skin, inhibiting the activity of lipase and reducing the synthesis of fat. By combining the traditional Chinese medicine naprapathy, the absorption and intracellular transport of the composition can be further promoted, the metabolism is promoted, the triglyceride in the fat is decomposed, the excretion of steroid and gallic acid is increased, the excretion of cholesterol and other metabolites can be accelerated, a local shaping effect is achieved, and the contents of glycerin and cholesterol in serum are reduced in an assisted mode. The pharmacological action of the cardiovascular system is improved, and the blood circulation is improved.

Described herein are nanostraw well insert apparatuses (e.g., devices and systems) that include nanotubes extending through and out of a membrane so that a material can pass through the membrane from a fluid reservoir depot and into a cell grown onto the nanotubes when electrical energy (e.g., electroporation energy) is applied. In particular, the device, systems and methods described herein may be adapted for cell growth viability and transfection efficiency (e.g., >70%). These apparatuses may be readily integratable into cell culturing processes for improved transfection efficiency, intracellular transport, and cell viability.

The invention specifically relates to a preparation method for a degradable white cardboard applied to food packaging, belonging to the technical field of papermaking. According to the invention, a self-made mixed base material, the self-made disperse starch material and lactic acid bacteria are subjected to mixed fermentation, and a fermentation product is centrifuged to obtain a viscous precipitate; the viscous precipitate and homemade ura sedge fibers are subjected to mixing and papermaking to obtain a top paper layer; shell powder is sprayed onto the top paper layer, and then calendering is carried out to obtain the degradable white cardboard; the used ura sedge fibers can act on the cell walls and the plasmalemmas of bacteria to prevent nutrients from being transported into cells; polylactic acid contained in the white cardboard has antibacterial and mildew-resistant functions, so the white cardboard has excellent antibacterial properties; polylactic acid also has the characteristics of softness and toughness, so the bending resistance of white cardboard can be improved; and a polylactic acid main chain in the white cardboard contains easily-hydrolyzable ester bonds, and polylactic acid belongs to polyester polymer materials, so the white cardboard has good degradation performance, is of great significance in environmental protection, and shows good application prospects.

Cyano-substituted anthracene containing polyamines were synthesized and shown to be efficient polyamine transporter ligands. Moreover, these compounds (3 and 4) had improved fluorescence properties over previously known anthryl-polyamine conjugates, which facilitated their intracellular trafficking by confocal microscopy and fluorescence methods. These cytotoxic fluorescent agents may find use as molecular probes which traffic into cells via the polyamine transport system and may also be viable anticancer drugs which are readily quantified in human tissues due to their excellent fluorescence properties: (excitation: λ405 nm) and emission (420 nm) occurs in the visible light range. The ability to excite and emit in the visible range provides an advantage to these probes as these wavelengths are considered non-toxic to human cells (versus ultraviolet mediated excitations, λ<400 nm) and visible light lasers are less costly to purchase and operate than UV laser sources.

The invention relates to a method for screening hERG potassium ion channel agonist and detecting toxicity. Particularly, the invention firstly relates to a fusion protein, which contains a fragment (which is used as the N end of the fusion protein, is from a position between 1st to 85th amino acid residues of the N end of the nemathelminth ERG family potassium ion channels UNC-103 protein and has the length of 75 to 85 amino acid residues), hERG or a fragment at least containing S1-S6 transmembrane domains and cyclic nucleotide binding domains, and a fragment (which is used as the C end of the fusion protein, is from a position between 590th to 829th of amino acid residues of the C end of the UNC-103 protein and has the length of 220 to 240 amino acid residues). The invention also relates to a polynucleotide sequence coding the fusion protein, a relevant transgenic nemathelminth, a relevant screening method and application. The inventor builds an in-vivo hERG-intracellular-transport-influence-recognizable compound molecule screening method for screening hERG inhibitors or LQTS (long QT syndrome) relevant channel mutant functional correcting agents for the first time; the novel path and method are provided for hERG toxicity detection and LQTS treatment medicine screening.

The invention provides a method for real-time monitoring of cell endocytosis to study anticancer drugs. The method for real-time monitoring of the endocytosis process provided by the present invention comprises the following steps: 1) adding anticancer drugs to make it act on the cells to be tested; 2) connecting epidermal growth factor on the cell membrane of the cells to be tested by a two-step labeling method -Quantum dot probe; 3) Using a fluorescence microscope to observe and photograph under the condition that the light intensity is less than 100 μW, and track the endocytosis process according to the quantum dot label; 4) Quantitatively analyze the photographed data to obtain a relative endocytosis curve. The method provided by the present invention achieves the study of drug effects by quantitatively analyzing the effect of anticancer drugs on endocytosis through real-time observation throughout the whole process, and also considers the influence of cell shape to standardize the endocytic transport data of different cells, completely It can realize horizontal comparison and provide a new quantitative research method for the research, development, screening and therapeutic effect of anticancer drugs.

The invention provides a plurality of recombinant microorganisms for producing orotic acid and a method thereof. The recombinant microbial strains have one or more or all of the following characteristics: (1) the synthesis of phosphoribosyltransferase or orotic acid nucleoside monophosphate decarboxylase in an orotic acid metabolic pathway is weakened or completely lost; (2) a corresponding enzymeamount is increased through overexpression of five genes of enzymes participating in the orotic acid synthesis route; and (3) the corresponding transport protein is increased by overexpression of a transport protein coding gene for intracellular transport of orotic acid.

A method and kits for regulating the intracellular trafficking of a target protein. In a retained state, the target protein is retained in a first compartment by an interaction with a hook protein. In a released state, the interaction is disrupted and the target protein traffics to a target compartment.

The present invention relates to new recombinant humanized immunotoxin hS83-P34, which contains fusion protein comprising the antigen associated molecule of humanized cytotoxic T cell antigen 4 and human porforin channel forming active molecule. The immunotoxin of the present invention has strict targeting, less tendency of damaging health cell, less toxic side effect, no need of internalization and intracellular transport, high acting efficiency, less likelihood of generating corresponding antibody, weak immunogenicity and less tendency of generating drug resistance. It may be used in treating some tumors and autoimmune diseases and suppressing immunologic rejection reaction in organ transplantation.

The invention provides a cell-penetrating peptide with negative charge and its homologues, having a cell internalization function. Net charge of the cell-penetrating peptide under physiological conditions is a negative value; an amino acid sequence is ELDGDV, LQEDTPP, DPNEKRD, DHMKQHD, NYTWDQW, TTDRHDL, SEQPAHS, DHYHPFS, SDAKNDL, DPYHPFS, SLTNTEH, TVSKGEE, EHYHPFM, TDTTPLQ, GGSAETG, DGPGTAA, SLTAPDY, PLDVNNM, DGTPVGM, LQNLGEF, DSHLSLM, VGSPDGL, DLNLPFA or PLLEGSL. The invention also provides application as an intracellular transport carrier and application of the cell-penetrating peptide withnegative charge as therapeutic drugs in terms of pharmaceutical application and imaging of the intracellular transport carrier.

The present invention identifies compounds that disrupt the interaction between anthrax proteins and LRP5/6 receptors, resulting in a reduction in anthrax toxicity. The compounds act to disrupt the intracellular transport of toxin complexes into a target cell. The present invention also provides methods for testing the effect of compounds on Wnt activity, through the use of in vitro experiments involving cells that have in at least one gene mutation involved in the Wnt pathway.