90 results about "Virosome" patented technology

The invention relates to the technical field of building materials, and particularly discloses a medical solid waste-based geopolymer material as well as a preparation method and application thereof. The medical solid waste-based geopolymer material comprises an interface modified bandage, an ultraviolet radiation modified infusion apparatus, iron tailing slag, ceramic slag, an alkali-activated solution and an enhancer. A hypochlorous acid solution is adopted to soak and disinfect the bandage, hypochlorous acid can kill pathogenic microorganisms, and generated chloride ions can also change osmotic pressure of bacteria and virions, so that cells of the bacteria and virions are inactivated; the disinfection bandage is subjected to interface adjustment, so that the cohesiveness of bandage fibers and a matrix can be improved; the infusion apparatus is subjected to ultraviolet radiation, so that the surface roughness of the infusion apparatus can be increased while disinfection and sterilization are performed, the cohesiveness of the infusion apparatus and a matrix interface is improved, and the infusion apparatus can be better integrated into a matrix. The cyclic utilization of the medical solid waste is realized, and the medical solid waste-based geopolymer material has excellent mechanical properties, and has certain environmental benefits and use values when being used in prefabricated building materials.

The invention discloses a method for quickly rescuing bovine coronavirus epidemic strains and application of the method. The bovine coronavirus SHZ isolate is subjected to efficient segmented cloning, the obtained segment and a Linker sequence are subjected to a cyclic polymerase extension reaction, and the obtained reaction product can be directly transfected to 293T cells for virus packaging without purification. Different from a traditional method, the method does not need to amplify full-length virus cDNA clone by means of bacteria and yeast, but directly obtains a sufficient amount of preliminary products through PCR, and avoids the problems of instability and low efficiency when partial sequences of a virus genome proliferate in a bacteria or yeast host. By adopting the reverse genetic system, the recombinant bovine coronavirus expressing the foreign protein is successfully rescued, a brand new technical platform is provided for dynamic visualization research of in-vivo and in-vitro replication of the virus, and an efficient and flexible tool is also provided for virology research, development of virus vector vaccines and screening of antiviral drugs.

The invention relates to the technical field of biology, and aims to provide a zinc ion-containing influenza A virus culture medium and a preparation method thereof. The culture medium contains a serum-free cell culture medium, water, a PBS (Phosphate Buffer Solution), bovine serum albumin with the final concentration of 20g / L, TPCK-Trypsin with the final concentration of 2mu g / mL and zinc ions with the final concentration of 0.009-0.015 mmol / L. According to the invention, zinc ions which are originally considered to generate a virus inhibition effect under a relatively low concentration condition can be used for promoting virus replication after the use concentration range is adjusted; therefore, a brand-new culture medium which can be applied to research on common cell models and virus in-vitro culture models of the influenza A virus is provided, and a new solution is provided for optimizing a vaccine production process. The culture medium is simple in formula and convenient to prepare; all the raw material components are common consumables in laboratories, and the required liquid components can be prefabricated in advance and refrigerated for later use; and large-scale vaccine production can be supported.

A composition is orally or topically administered to a patient susceptible to infection by an orthopoxvirus such as monkeypox (mpox). The composition includes inhibitors configured to bind to orthopoxvirus envelope proteins, e.g., MPXV A29 from mpox. The inhibitors can include sulfated polysaccharides or glycans such as heparin, chondroitin sulfate A, chondroitin sulfate B (dermatan sulfate), chondroitin sulfate C, chondroitin sulfate D, chondroitin sulfate E, pentosan polysulfate, mucopolysaccharide polysulfate, or combinations thereof. Binding of the composition to the envelope proteins inhibits the interaction between the virions and heparan sulfate proteoglycans (HSPG) and thus the ability of the virions to enter the host cell. Limiting this transport across the host cell membrane inhibits initial viral infection, as well as limits spread of that infection from cell to cell even in the event viral infection is initially achieved, providing significantly improved patient treatment and recovery outcomes relating to orthopoxvirus infections such as mpox.

The present disclosure provides adeno-associated virus (AAV) virions with altered capsid protein, where the AAV virions exhibit greater infectivity of retinal cells, when administered via intravitreal injection, compared to wild-type AAV. The present disclosure further provides methods of delivering a gene product to a retinal cell in an individual, and methods of treating ocular disease.

The invention provides a cell strain for producing engineered viroid particles, a method thereof and the engineered viroid particles, the cell strain is named as SZCV-Con28 and preserved in Guangdong Microbial Culture Collection Center on October 15, 2025, the preservation number is GDMCC No: 67101, and the preservation number is GDMCC No: 67101. A plurality of corresponding cell factories for producing the engineered viroid particles are established by cell lines obtained by introducing different target gRNA elements into the cell strain, so that the corresponding engineered viroid particles can be continuously produced in batches. According to the invention, large-scale preparation can be realized through cell expanding culture, the capacity limitation is overcome, the production process flow is simplified, and the consumption of production raw materials is reduced.

A method for ultra-fast inactivation of viruses based on periodate, which relates to the technical field of waterborne virus disinfection. This method forms a mixed system by adding a periodate oxidant and a homogeneous trivalent ruthenium ion activator of transition metals into the water body containing the virus to be treated, and then rapidly and thoroughly inactivates the virus. The present invention uses a homogeneous transition metal ruthenium ion catalyst to activate periodate, which not only destroys the culturing ability of the virus, but also destroys the nucleic acids encoding protein and RNA replication in the virus, and at the same time affects the functions of attachment and injection into the host during virus proliferation, achieving the complete inactivation of the virus. This method has a wide range of applications, does not require additional energy and instrumentation, saves energy, and is simple to operate.

Provided are methods for inducing immune responses against pathogens in a mammal. The methods comprise administering a single cycle adenovirus (SC-Ad) comprising a nucleic acid sequence encoding an immunogen of said pathogen to said mammal. The SC-Ad is administered by inhalation and infects a cell of said mammal, thereby causing expression of said immunogen leading to the induction of said immune response. New infectious virions are not produced. The methods may be of particular utility in vaccination for respiratory pathogens. Corresponding medical uses of the SC-Ads are also provided.

The present disclosure provides recombinant adeno-associated virus (rAAV) virions with an engineered capsid protein. In particular, the disclosure provides AAV9 virions with engineered AAV9 capsid, AAV5 / 9 chimeric capsid or combinatory capsid that achieves increased transduction efficiency in cardiac cells, increased cell-type selectivity, and / or other desirable properties.

The invention relates to the field of ion exchange based purification processes and provides an improved method for the purification of lipid enveloped viruses. Use of the elution solution significantly enhances the efficiency of the recovery of the infective virus, in particular intact SARS-CoV-2 virions.

Polynucleotides, vectors, systems of vectors or polynucleotides, cells, and methods for expressing AAV Rep proteins are provided. In certain aspects, among the provided embodiments are polynucleotides, vectors, and systems of vectors or polynucleotides, and cells including the same, that include a polynucleotide that includes a ribozyme. In certain aspects, these polynucleotides, vectors, systems of vectors or polynucleotides, cells, and methods may be used to produce higher levels of small Rep transcripts as compared to large Rep transcripts. In certain aspects, these polynucleotides, vector systems, cells, and methods may be used to produce higher levels of small Rep proteins as compared to large Rep proteins. In certain aspects, these polynucleotides, vectors, vector systems, cells, and methods may be used to produce recombinant AAV (rAAV). Increased expression of small Rep as compared to large Rep is useful in many aspects, such as, increasing total virions and increasing packaged virions during the production of rAAV.

To provide a method for producing mammalian cells containing a lentiviral packaging vector.SOLUTION: A method of producing a lentiviral packaging vector-containing mammalian cells, comprising: a. transfecting a mammalian cell with a packaging vector comprising an expression cassette encoding: 1. a lentiviral regulator of expression of virion proteins (REV) gene under control of a first promoter; 2. a lentiviral envelope gene under control of a second promoter; and 3. a lentiviral group specific antigen (GAG) gene and a lentiviral polymerase (POL) gene both under control of a third promoter where the expression cassette is flanked on both the 5' and 3' ends by transposon-specific inverted terminal repeats (ITR); b. culturing the transfected mammalian cell; and c. isolating the lentiviral packaging vector-containing mammalian cell.SELECTED DRAWING: Figure 1

The embodiment of the application discloses a virus structure three-dimensional reconstruction method and system, the method comprises the following steps: acquiring stereoscopic data and point cloud data containing a target virus sample; separating virus particles from the point cloud data by using an optimized point cloud segmentation algorithm; separating virus regions from the stereoscopic data by using a stereoscopic data segmentation algorithm; processing the virus stereoscopic data by using a first neural network to obtain density characteristics of the virus structure; processing the virus point cloud by using a second neural network to obtain geometric characteristics of the virus surface; fusing the density characteristics and the geometric characteristics by using a multi-modal fusion model to generate unified feature representation; and reconstructing a three-dimensional model of the virus structure based on the unified feature representation. The application can accurately obtain the three-dimensional structure of the virus in a complex background, and improves the accuracy of virus three-dimensional reconstruction.

Immunization with nucleic acids is achieved by delivering a self-replicating RNA encapsulated in a small particle. The RNA encodes an immunogen of interest, and the particle can deliver the RNA by mimicking the delivery function of a natural RNA virus. Accordingly, the invention provides a particle other than a virion for in vivo delivery of RNA to a vertebrate cell, wherein the particle comprises a delivery material that encapsulates a self-replicating RNA molecule encoding an immunogen. Such particles are useful as components of pharmaceutical compositions for immunizing subjects against various diseases.

The present disclosure provides nucleic acid constructs (e.g., HDAd vectors), set of nucleic acid constructs (e.g., one or more HDAd vectors), HDAd virions, and HDAd virus comprising all the components for site-specifically integrating an exogenous nucleic acid into a cellular genome at a desired target sequence. The present disclosure also provides methods of using the same.

The embodiment of the invention discloses a virus structure three-dimensional reconstruction method and system. The method comprises the following steps: acquiring stereoscopic data and point cloud data containing a target virus sample; separating virus particles from the point cloud data by using an optimized point cloud segmentation algorithm; separating a virus region from the stereoscopic data by using a stereoscopic data segmentation algorithm; processing the virus stereoscopic data by using a first neural network to obtain density characteristics of a virus structure; processing the virus point cloud by using a second neural network to obtain geometric features of the virus surface; fusing the density features and the geometric features by using a multi-modal fusion model to generate unified feature representation; reconstructing a three-dimensional model of a virus structure based on unified feature representation; according to the method, the three-dimensional structure of the virus can be accurately obtained under a complex background, and the accuracy of three-dimensional reconstruction of the virus is improved.

Described herein are polynucleotide constructs for inducible production of rAAV virions. Also provided are stable cell lines for inducible expression of rAAV virions that include a payload polynucleotide.

The present invention provides a recombinant adeno-associated virus (rAAV) virion comprising a variant capsid polypeptide, wherein the variant capsid polypeptide comprises an alteration to an amino acid corresponding to an adeno-associated virus (AAV) capsid polypeptide amino acid selected from the list consisting of any one or more of V125, V183, N411, Y447, R490, T495 and F536 of SEQ ID NO:1; and the variant capsid polypeptide comprises an alteration to increase retrograde transport of the rAAV virion by neuronal axons.

The application discloses application of Punicalin in preparation of a medicine for resisting respiratory syncytial virus. The respiratory syncytial virus is an RNA virus, and is the most important virus body causing acute lower respiratory tract infection of children under 5 years old in the world. It is found that the Punicalin can effectively inhibit replication of the respiratory syncytial virus and effectively resist respiratory syncytial virus infection. Therefore, the Punicalin has the prospect of being developed into the medicine for resisting the respiratory syncytial virus.

Provided is a variant AAV capsid protein, comprising one or more modifications. The modification comprises an insertion of amino acid sequences selected from the group consisting of SEQ ID NOs: 1-10091, and SEQ ID NOs: 20202-35556, or a sequence that is at least 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, or 99.9% identical to an amino acid sequence selected from the group consisting of SEQ ID NOs: 1-10091, and SEQ ID NOs: 20202-35556. A polynucleotide, a host cell, a vector, an AAV virion and a pharmaceutical composition thereof are also provided. Further provided is a method of treating disease. The method comprises administering to a subject in need thereof an effective amount of the recombinant AAV virion.

The set of inventions relates to biotechnology and medicine, and more particularly to expression vectors for producing proteins in mammalian cells, combinations of said expression vectors for the treatment of congenital adrenal hyperplasia and methods contemplating the use of said combinations, and sets of expression vectors based on adeno-associated virus (AAV) virions, it is useful for medical use, and in particular for the treatment of congenital adrenal hyperplasia.

This invention relates to novel surface modified viral capsids and recombinant virions comprising the same. Furthermore, this invention concerns intermediates for the preparation of surface modified viral capsids. The surface modified viral capsids are designed to selectively and / or more efficiently deliver gene therapy. The surface modified viral capsids, when incorporated into a recombinant virion, can be used to treat an illness that is characterized by genetic abnormality.

The invention discloses an anti-HPV (human papillomavirus) underwear laundry detergent based on a sulfated polysaccharide compound system, which is prepared from the following raw materials in percentage by mass: 0.3 to 2 percent of sodium citrate, 6 to 12 percent of fatty alcohol polyoxyethylene ether sodium sulfate, 4 to 10 percent of fatty alcohol polyoxyethylene ether sodium sulfosuccinate, 1.5 to 5 percent of cocamidopropyl betaine, 2 to 6 percent of lauramide propyl hydroxy sulfobetaine and the balance of water. The cleaning agent is prepared from the following components in percentage by weight: 2 to 8 percent of alkyl glycoside, 2 to 6 percent of potash soap, 0.1 to 0.3 percent of citric acid, 0.2 to 0.5 percent of protease, 0.8 to 2.5 percent of sulfated polysaccharide, 0.2 to 0.5 percent of silver ion, 0.2 to 0.6 percent of dichloro, 0.1 to 0.2 percent of Kathon, 0.2 to 0.5 percent of essence, 0.5 to 1.5 percent of sodium chloride and the balance of deionized water. According to the invention, a brand-new ternary synergistic antiviral system composed of sulfated polysaccharide, silver ions and diclosan is creatively constructed, and the inactivation rate of the system to pseudoviruses HPV-16 and HPV-18 is increased to gt; compared with a binary combination with the optimal effect, the activity of the compound is improved by more than one order of magnitude, and the qualitative change from partial inhibition to complete removal is realized. The efficient cleaning capacity brought by the synergistic effect can cut off the path of contact transmission of viruses through fabrics such as underwear from the source, and a feasible solution is provided for daily physical prevention of HPV-related infection.

In some aspects, the present disclosure provides engineered adeno-associated virus (AAV) capsid proteins comprising a non-naturally occurring amino acid motif described herein. In some embodiments, the present disclosure provides an AAV9, AAV5, AAVrh.10 or AAVrh.74-based engineered capsid protein, that when assembled into virions, achieves increased transduction efficiency of the heart, and / or other desirable properties. Also provided herein are recombinant AAV virions comprising any of the engineered capsid proteins described herein and uses thereof.

The application belongs to the field of virus bodies. The application provides an AAV capsid protein mutant and application thereof, wherein at least one of QNDIKNG, GNDLRPT, NGNAIVG and DNNLAKL is inserted between any two amino acids of a surface variable region of a VP1 protein of a wild type or modified AAV1, AAV2, AAV3, AAV4, AAV5, AAV6, AAV7, AAV8, AAV9, AAVrh.74 and AAVrh.10 or a protein having at least 80% sequence identity with the amino acid sequence of the above proteins. Compared with the existing AAV capsid protein, the insertion of the amino acid sequence of the AAV capsid protein mutant of the application causes a significant increase in the transduction efficiency of the adeno-associated virus on peripheral blood-derived macrophages, bone marrow-derived macrophages and microglial cells.

The invention discloses a method for enriching and detecting lake and reservoir planktonic viruses based on an environmental DNA technology and application of the method, and belongs to the technical field of microorganism detection.The method comprises the steps that 1, according to the change rate of dissolved oxygen on the vertical section of a lake and reservoir water body, the water body is divided into a lake upper layer, an oxygen spring layer and a lake lower layer; 2, when the water depth is smaller than 3 m and thermal stratification and oxygen stratification do not exist, collecting a water sample at the position 0.5 m away from the surface layer, when the water depth is 3-10 m, collecting the water sample at the position 0.5 m away from the surface layer and the water sample at the position 1-2 m away from the upper portion of bottom sediment, and when the water depth is larger than 10 m, at least collecting samples of three water layers; according to the method, by combining two different sample treatment methods, lake and reservoir planktonic virus communities including intracellular viruses and virions can be more comprehensively detected, so that more complete information is obtained. By knowing the structure and function of the lake and reservoir planktonic virus community, a scientific basis is provided for water environment monitoring and management, water body pollution can be prevented and controlled, and the water ecological environment is protected.

The invention discloses a TAT-recombinant avian beta defensin fusion protein as well as a coding gene and application thereof, and belongs to the technical field of variation or genetic engineering. The TAT and the recombinant avian beta defensin (AvBD) are fused for the first time, the TAT-recombinant avian beta defensin fusion protein is constructed, the efficient cell penetrating ability of the TAT and the antiviral ability of the recombinant avian beta defensin are fused, the inhibition effect on virus infection is remarkably enhanced, and the TAT-recombinant avian beta defensin fusion protein can be used for preparing the recombinant avian beta defensin-TAT-recombinant avian beta defensin fusion protein. The fusion protein shows excellent antiviral activity in an in-vitro cell model and an in-vivo live chicken experiment, and can be applied as an antiviral biological preparation; the cell-penetrating peptide TAT is used for preparing a transmembrane delivery system, intracellular delivery of protein is achieved in one step, in-vitro and in-vivo proliferation of avian viruses such as ALV-J, REV, MDV and CIAV is remarkably inhibited, safety and high efficiency are achieved, the cell-penetrating peptide TAT can be developed into a broad-spectrum antiviral biological agent, and meanwhile a new thought of avian virus prevention and treatment research is created.

The present invention is in the field of virions. The invention provides an AAV capsid protein mutant and application thereof. At least one of oligopeptide amino acid sequences QNDIKNG, GNDLRPT, NGNAIVG and DNNLAKL is inserted between any two amino acids in a surface variable region of at least one of wild type or modified capsid protein VP1 of AAV1, AAV2, AAV3, AAV4, AAV5, AAV6, AAV7, AAV8, AAV9, AAVrh.74 and AAVrh.10 or proteins with at least 80% sequence consistency with the amino acid sequences of the above proteins. Compared with the existing AAV capsid protein, the AAV capsid protein mutant has the advantage that the transduction efficiency of the adeno-associated virus on peripheral blood-derived macrophages, bone marrow-derived macrophages and microglial cells is remarkably improved due to the insertion of the amino acid sequence.

Orthotospovirus virions travel through the thrips foregut and enter midgut epithelial cells through the interaction between virus glycoproteins and cellular receptors with several protein motifs thought to be involved in the interaction. Single, double and triple mutant polypeptides in the soybean vein necrosis virus (SVNV) / Neohydatothrips variabilis system are provided herein and several are shown to block viral transmission from the thrips to the soybean plants. Methods for inhibiting viral transmission using these polypeptides or constructs comprising polynucleotides encoding peptides are also provided herein.

The present invention discloses a method for increasing the infection amount of porcine deltacoronavirus in vitro. During the in vitro culture of PDCoV in PK-15 cells or IPEC-J2 cells, heavy metal cadmium is added, and the added concentration of heavy metal cadmium is 7.5 μM to 15 μM. Compared with the group without heavy metal cadmium treatment, the RNA content, protein expression level of PDCoV in the group with heavy metal cadmium added, and the titer of harvested progeny virus are significantly increased, and each index is about 2 to 3 times that of the blank control. The information of PDCoV-infected cells provided by the present invention enriches the proliferation mechanism of PDCoV and lays a foundation for subsequent research on the pathogenic mechanism of PDCoV. The method provided by the present invention can also be applied to the production of PDCoV vaccines.