411results about "Compounds screening/testing" patented technology

The invention belongs to the technical field of biotechnology and animal models, and discloses a double-person-derived mouse model for simulating a tumor immune microenvironment and a construction method and application thereof. The method comprises the following steps: firstly, pretreating NSG immunodeficient mice by adopting low-dose whole-body irradiation in combination with double-antibody targeted bone marrow depletion, and transplanting CD34 + hematopoietic stem cells from the same human donor to complete human immune system reconstruction; separating tumor primary cells, tumor-related fibroblasts and tumor vascular endothelial cells of the same donor, performing three-dimensional co-culture to obtain homologous human tumor organs, and performing in-situ inoculation to immune reconstruction mice to obtain a target model. The core defects of MHC mismatching, low immune reconstruction efficiency, poor tumor immune microenvironment simulation degree, low clinical consistency and the like of an existing model are overcome, and the method can be used for tumor immune treatment drug screening, microenvironment mechanism research and personalized tumor treatment scheme verification.

The invention discloses a humanized osteoporosis mouse model and a construction method thereof, and belongs to the technical field of biotechnology and animal models. The invention aims at the core defects of large species difference, insufficient humanization degree, low pathological simulation degree, unstable phenotype and the like of the existing osteoporosis model. The humanized osteoporosis mouse model is constructed through five core steps of experimental animal pretreatment, collagen-nano hydroxyapatite bionic scaffold preparation and cell pre-implantation, immune-bone metabolism double-derived system construction, progressive osteoporosis induction and model identification and verification. According to the method, double-person origination of immune and bone metabolism systems is realized for the first time, the colonization rate and survival time of human cells are greatly improved, the pathological process of clinical postmenopausal osteoporosis is accurately simulated, the phenotype of the model is stable and uniform, the reactivity matching degree with clinical drugs is high, and the method can be widely applied to research and development of anti-osteoporosis drugs and research of pathological mechanisms.

The invention provides a GelMA microneedle patch loaded with chromogenic gold nano bipyramids and a preparation method thereof.The method comprises the steps that citric acid, chloroauric acid and a CTAC solution are mixed, then sodium borohydride is added, and a seed solution is obtained through stirring and standing; mixing chloroauric acid, silver nitrate, hydrochloric acid and CTAB (cetyltrimethyl ammonium bromide), and sequentially adding ascorbic acid and the seed solution to obtain a growth solution; carrying out centrifugation, morphology regulation and chemical etching purification to obtain a chromogenic gold nano bipyramid solution; the preparation method comprises the following steps: reacting gelatin with methacrylic anhydride in PBS, dialyzing and freeze-drying to obtain GelMA; dissolving GelMA in the gold nanoparticle bipyramid solution, and adding a photoinitiator LAP to obtain a mixed precursor solution; and the GelMA microneedle patch loaded with the gold nano bipyramid is prepared through mold casting, centrifugation, ultraviolet light crosslinking and drying demolding. The microneedle extraction and gold nano bipyramid color development integrated scheme is initiated, blood sampling is not needed, the dermis interstitial fluid is extracted in a minimally invasive mode through the microneedle, detection pain and trauma are reduced, the cross infection risk of blood treatment is avoided, and the microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle microneedle

The invention discloses a construction method and application of a bacterium-derived depression mouse model, and belongs to the technical field of biological medicines. The method comprises the following steps: randomly grouping SPF (specific pathogen free) grade C57BL / 6J experimental mice; using drinking water quadruple antibiotics or intragastric administration quadruple antibiotics to deplete mouse background intestinal flora; according to the method, a freshly prepared Eggera tarda bacterial liquid is applied to male mice of 7-9 weeks old in an intragastric administration manner, and the bacterial-derived depression mouse model is constructed. According to the construction method disclosed by the invention, by directly planting the Eggera tarda which has a definite causal relationship with the major depression, multivariable interference introduced by a traditional complex mental stress model is avoided, and a'bacterial origin 'animal model which is more single in variable, clearer in causal relationship and clearer in mechanism is constructed; and an efficient and reliable experimental tool is provided for accurately explaining the specific action mechanism of the'microorganism-intestine-brain axis' mediated by the Eggera tarda in the occurrence and development of the depression.

The invention belongs to the technical field of biomedical imaging, and particularly discloses an in-vivo imaging method of an SAPAP3 gene defect disease model, which is characterized in that an effective dose of an S1PR1 receptor targeted radioactive probe is injected into the body of the SAPAP3 gene defect disease model. According to the method, an S1PR1 receptor targeting radioactive probe is utilized, the technical bottleneck that in-vivo and dynamic observation of the S1PR1 receptor cannot be achieved through an existing in-vitro technology is solved, and an indispensable visual tool and a quantitative evaluation means are provided for studying the neurobiological mechanism of related mental diseases such as obsessive-compulsive disorder and accelerating research and development of related drugs.

The invention discloses a construction method and application of an animal model for evaluating cardiotoxicity of antitumor drugs, sodium carboxymethyl cellulose (CMC-Na) with extremely low cost is adopted to replace matrigel, a tumor-bearing mouse model with high stability can be constructed at low cost, and experimental verification shows that 4T1 cells are resuspended by using a 0.7% CMC-Na solution, and the tumor formation rate of subcutaneous inoculation reaches gt; 95%. The tumor microenvironment-mediated cardiac injury critical period is accurately captured, and the constructed tumor-bearing mouse model is the optimal tumor-bearing mouse model for evaluating the cardiotoxicity of an antitumor drug (adriamycin) in the tumor microenvironment in the third week after the mouse has a 50mm < 3 > tumor.

The invention discloses a construction method and application of an animal model of Parkinson's disease, and relates to the technical field of animal models of neurodegenerative diseases. The animal model of the Parkinson's disease induces alpha-synuclein to be transmitted along an intestine-brain axis. The construction method comprises the following steps: (1) providing an SD (Sprague Dawley) rat; and (2) performing intragastric administration on the SD rat with rotenone according to the dosage of 30mg / kg / day, so as to obtain the animal model of the Parkinson's disease. The Parkinson's disease modeling method successfully simulates sequential transmission of alpha-syn along the intestine-brain axis, has the advantages of strong targeting, low death rate, endogenous pathology generation and the like, and provides a reliable platform for PD mechanism research and treatment development. According to the screening method of the medicine for treating the Parkinson's disease, the blocking effect of the medicine on PD pathology source transmission can be accurately evaluated by detecting the deposition amount of alpha-syn at multiple parts, and the defects of a traditional model are overcome; the method is suitable for research and development requirements of various drugs, and the application range is far better than that of a screening model only aiming at a single pathological link.

The invention discloses construction and application of a Primrose syndrome non-human animal model, and belongs to the technical field of animal models and disease research. According to the invention, through a CRISPR / Cas9 technology, a codon CAC for coding 596th histidine in a No.14 exon of a mouse Zbtb20 gene is subjected to site-directed mutagenesis into CGC for coding arginine, and a hybrid mouse model for simulating pathogenic point mutation (p.H596R) of human Primrose syndrome is constructed. The model can stably reproduce key clinical phenotypes of the Primrose syndrome, including overgrowth after adult, serum IGF-1 rise, memory dysfunction and anxiety behaviors, and shows abnormal hippocampal neuronal development and synaptic transfer related pathways and the like. The invention provides an important experimental tool for deeply revealing the pathological mechanism of Primrose syndrome, developing drug screening and treatment intervention research and the like.

Provided herein are screening methods and animal models relevant to ocular diseases such as age-related macular degeneration (AMD), e.g., for use in identifying candidate therapeutics for treating or preventing ocular diseases such as AMD. Also provided herein are compounds / compositions useful for killing or inhibiting the growth of microorganisms such as Bacillus megaterium. Further provided herein are methods of using the compounds / compositions to treat infections with microorganisms such as Bacillus megaterium, as well as to treat or prevent diseases or conditions associated with such infections, such as AMD.

The invention belongs to the technical field of construction methods of disease animal models, and particularly relates to a construction method and application of a renal syndrome hemorrhagic fever mouse model. According to the HTNV infected mouse model established by the method disclosed by the invention, the symptom of the experimental mouse is close to the clinical symptom of a severe hemorrhagic fever with renal syndrome after challenge, the complete lethality and repeatability are high, and the HTNV infected mouse model has the advantages of simple operation, low cost and high efficiency. The method can be used for research on the HTNV pathogenic mechanism and immune mechanism and research and development of antiviral drugs and vaccines, and has great application value for perfecting an HTNV full-chain prevention and control system.

The application discloses application of a CCL15 neutralizing antibody in preparation of a medicine for inhibiting growth of liver cancer, and comprises the following steps: S1, constructing a mouse liver cancer PDX model and performing passage; S2, randomly dividing the immunodeficient mouse after passage into a control group and an experimental group, and performing dosing treatment on the control group and the experimental group every three days; S3, PDX model tumor tissue evaluation, stripping tumor tissues after 11 times of dosing of the control group and the experimental group, and respectively observing and recording the volume and weight of the tumor tissues of the control group and the experimental group; the method for inhibiting growth of liver cancer provided by the application, CCL15 acts on the stellate cells to activate the stellate cells and make the expression spectrum of the stellate cells change significantly, the CCL15 neutralizing antibody has an anti-tumor effect in the liver cancer PDX model through injection, and tumor-derived CCL15 can indirectly promote growth of liver cancer cells by activating the hepatic stellate cells.

A method and device are provided for evaluating hair growth treatments by applying markers to a hair area at different times to measure pre-treatment hair volume and post-treatment hair volume. By comparing changes in hair volume within one or more hairs, an effectiveness of the hair regrowth treatment can be measured.

The application belongs to the technical field of biotechnology, and particularly relates to a human metapneumovirus mouse-adapted strain and application thereof. Compared with wild strains, the strain can exhibit stronger susceptibility to animals, and can cause typical clinical symptoms and even death. For example, after the strain infects BALB / c mice, the disease symptoms are obvious, 83% of the mice have a severe decrease in body weight to below 75% after infection, and have reached the humane killing standard. Four days after the strain infects BALB / c mice, the mortality rate is above 50%. The strain can be used to construct a cell model or an animal model of human metapneumovirus infection or a disease caused by the human metapneumovirus, and is further used to screen drugs for preventing and / or treating human metapneumovirus infection or a disease caused by the human metapneumovirus. In addition, the strain can also be used to prepare drugs for preventing and / or treating human metapneumovirus infection or a disease caused by the human metapneumovirus, and to prepare antibodies or antisera against the human metapneumovirus.

The invention discloses a mouse liver cancer cell line with a high lung metastasis characteristic as well as a construction method and application thereof, and belongs to the technical field of biology and oncology. The cell is preserved in China Center for Type Culture Collection on February 4, 2026, the preservation address is Wuhan University, Wuhan, China, and the preservation number is CCTCC NO: C202621. The PNV-LM3 cell line provided by the invention is constructed by combining a PTEN KO and NRAS G12V mutated hydrodynamic tail vein injection model with tail vein injection in-vivo domestication, a mouse liver cancer model is successfully induced to generate lung metastasis, and the lung metastasis tendency of the cell line is greatly enhanced. Compared with a traditional Hepa1-6 cell line, the PNV-LM3 cell line has the advantages that the lung metastasis process of the liver cancer is more accurately and efficiently reproduced, and a more real experimental platform is provided for research of a liver cancer metastasis mechanism.

The invention belongs to the technical field of medical experimental animal models, and particularly relates to a construction method of a rabbit ear acne model for studying acne pathogenesis and drug curative effect. A healthy New Zealand large-ear white rabbit is selected, a testosterone solution is subcutaneously injected to induce endocrine disorder, oleic acid is smeared at an opening of an external auditory canal on the inner side of an ear, dermatobacterium acnes suspension is subcutaneously injected, and whether acne-like lesions such as erythema, papule and comedo appear on the skin of the ear or not is observed. The method is easy and convenient to operate, low in cost, good in repeatability, capable of simulating the pathological process of human acne and suitable for acne pathogenesis research and drug screening.

Methods for identifying agents or manipulations that modulate copper (Cu) dyshomeostasis in an Mblac1- or swip-10-dependent manner, and for identifying agents that support Cu-dependent neuronal health in a subject are provided.

The application relates to a construction method of a Mettl3 transgenic mouse model with specific knockout, enriches the understanding of the function and action mechanism of Mettl3 in mature pancreatic islet beta cells, and provides a new thought and target for the pathogenesis and treatment of diabetes.

The invention relates to a method of therapy guidance, stratification and / or monitoring of fluid therapy based on proadrenomedullin (proADM) levels. The invention therefore relates to a method for therapy guidance, stratification and / or monitoring of a fluid therapy, comprising providing a sample of said patient, determining a level of pro adrenomedullin (proADM) or fragment(s) thereof in said sample, wherein said level of proADM or fragment(s) thereof indicates the prescription of fluid therapy to be administered to the patient. The invention further relates to methods for guiding fluid therapy volume and to methods of treating disease using fluid therapy based on the proADM stratification of patients based on the methods described herein.

The present invention provides a novel antigen for soy allergy, a diagnostic method and kit for soy allergy, a pharmaceutical composition containing the antigen, soybeans or soybean products from which the antigen has been removed, and a tester for determining the presence or absence of soybean antigen in a target object. [Solution] A polypeptide is provided which comprises a polypeptide containing at least one amino acid sequence selected from a specific group, which specifically binds to IgE antibodies in patients with polypeptide allergies, and which has 500 or fewer amino acid residues.

The present invention provides a novel antigen for soy allergy, a method and kit for diagnosing soy allergy, a pharmaceutical composition containing the antigen, soybeans or soybean products from which the antigen has been removed, and a tester for determining the presence or absence of soybean antigen in a target object. [Solution] The diagnostic kit of the present invention comprises at least one of the proteins identified as (1) to (8), or at least one of the proteins identified as (1α) to (55α).

Non-human animals, and methods and compositions for making and using the same, are provided, wherein said non-human animals comprise a humanization of an endogenous cluster of differentiation (CD) gene, in particular a humanization of a CD47 gene. Said non-human animals may be described, in some embodiments, as having a genetic modification to an endogenous CD47 gene so that said non-human animals express a CD47 polypeptide that includes a human portion and a non-human portion (e.g., a murine portion).

This invention confirms that ventral hippocampal ignition leads to functional reorganization of the ventral hippocampal excitatory circuits. Most notably, this results in increased connectivity with the medial prefrontal cortex, increased activation on fMRI, and increased electrophysiological activation amplitude. Evidence suggests increased anxiety after ignition. This invention provides a method for imaging a single epileptic seizure using simultaneous LFP-fMRI. Imaging the spatiotemporal dynamics of an individual epileptic seizure can characterize the propagation patterns of focal and secondary generalized seizures, thereby providing targeted interventions.

The present invention relates to a biocompatible tattoo ink that changes color in response to varying glucose levels in the bloodstream, providing a continuous monitoring method for individuals with diabetes. The ink contains glucose-sensitive agents that cause the tattoo to change from green (normal glucose levels) to red (high glucose levels) or blue (low glucose levels). Additionally, the ink shifts back to green when blood glucose returns to normal from either hyperglycemia or hypoglycemia. This provides a real-time visual indicator of glucose levels and enables users to monitor their health without additional equipment.

The present disclosure provides an immunodeficient or immune-impaired chimeric non-human animal with a deletion or impairment of adeno-associated virus receptor (AAVR), comprising human hepatocytes, methods for preparing the chimeric non-human animal comprising human hepatocytes and methods of utilizing the chimeric non-human animal comprising human hepatocytes to evaluate transduction efficiency of adeno-associated viruses (AAV), and determine mechanism of inhibition / modification of AAV transduction in human hepatocytes.

The application provides a method for constructing an animal model of dilated cardiomyopathy and application, belongs to the technical field of biological medicine and animal genetic model construction, provides a new zebrafish model of dilated cardiomyopathy, is constructed by specifically overexpressing a truncated dnajb6b gene long isoform fragment in zebrafish myocardial cells, the nucleotide sequence of the gene fragment is shown as SEQ ID NO. 1, and the method for constructing the zebrafish model of dilated cardiomyopathy and application are provided, and it is further found that 4-phenylbutyric acid is applied to the preparation of a drug for treating dilated cardiomyopathy.

The invention provides an LMNA mutant gene and application thereof, and belongs to the technical field of biomedicine. The nucleotide sequence of the human LMNA mutant gene is as shown in SEQ ID NO. 1. The LMNA mutant gene can be used for screening dilated cardiomyopathy and atrioventricular block and constructing a non-human animal model of the dilated cardiomyopathy and the atrioventricular block, and is beneficial to exploring pathophysiological processes of the dilated cardiomyopathy and the atrioventricular block and exploring therapeutic targets and drugs of the dilated cardiomyopathy and the atrioventricular block.

The invention belongs to the technical field of cosmetic detection, and relates to a method for evaluating the skin barrier repair effect of cosmetics and application of the method, and the method comprises the following steps: carrying out grouping culture on nematodes after the same period: a culture of a sample group contains a to-be-detected sample; the culture of the control group does not contain the sample to be detected, and other culture conditions are consistent with those of the sample group; the cultured nematodes are collected, nematode precipitates are centrifugally taken and dyed, the dyed nematodes are subjected to fluorescence intensity detection, and if the fluorescence intensity of the nematodes in the sample group is remarkably different from that of the nematodes in the control group, the sample to be detected has the skin barrier repairing effect. The method for evaluating the repairing effect of the cosmetic is provided on the basis of caenorhabditis elegans, the repairing degree of the product to the caenorhabditis elegans is judged by measuring the fluorescence intensity of the caenorhabditis elegans, and then the repairing effect of the product is reflected. The experimental period is short, the experimental consumable cost is low, and ethical conflicts do not exist.

The application relates to the technical field of animal models, in particular to a modeling method and an evaluation method of an animal menstrual dysmenorrhea model and application, wherein the animal with removed ovaries is injected with estrogen, progesterone and oxytocin, the pharmacological injection of progesterone can reduce the harm and mortality rate of the animal caused by the implantation and removal of a progesterone release body in the prior art, the surgical stress of the animal is reduced, the injection time of the progesterone in the application is 7-9 days, and the animal menstrual dysmenorrhea model is obtained after the progesterone is withdrawn for 16 hours; after evaluation by the evaluation method, compared with the non-menstrual process of the dysmenorrhea model in the prior art, the animal menstrual dysmenorrhea model can better simulate the pathophysiological process of human dysmenorrhea, promote the development of clinical treatment, and effectively help patients to relieve pain.

The application provides a construction method of a humanized keloid mouse model, comprising the following steps: BAC plasmid construction and preparation; superovulation of experimental mice and collection of zygotes; pronuclear microinjection of zygotes; post-injection embryo transplantation; genotype identification; breeding and genetic analysis; and verification of construction results of the humanized immune system by immunohistochemistry and immunofluorescence. In the application, peripheral blood mononuclear cells treated by sCD27 and skin around keloids (homologous cells and tissues) are transplanted into NSG-MHC-DKO immune-deficient mice with overexpression of CD70 genes, so that HLA rejection of different homologous immune cells and tissues can be avoided, the internal microenvironment of keloids and the interaction between the internal microenvironment and the immune system can be restored to the maximum extent, and the influence of immune factors on the occurrence and development of keloids can be realized in vitro. The application first discovers and verifies that the activation of the CD27-CD70 axis can promote the occurrence and development of keloids, and provides a suitable animal model for the research and development of anti-keloid drugs, especially immunotherapy.

The invention relates to a cat magnesium ammonium phosphate calculus model and a construction method and application thereof, and belongs to the technical field of medical animal models. The construction method of the cat magnesium ammonium phosphate calculus model comprises the following steps: inserting a sterile catheter into the bladder of a modeling animal through the urethra; the proteus mirabilis bacterial liquid is injected into the bladder of the modeling animal through the catheter, the catheter is pulled out, and when it is observed that magnesium ammonium phosphate crystals and / or magnesium ammonium phosphate stones exist in the bladder and / or urine of the modeling animal, the cat magnesium ammonium phosphate stone model is obtained. The modeling method aims at safely and effectively simulating the key pathological process of cat struvite urolithiasis induced by upstream urinary tract infection (proteus mirabilis infection), and the defects that due to operator factors, the individual severity degree difference is large, other complications are difficult to control, repeatability is poor and the like can be overcome.