433 results about "Phagocytosis" patented technology

Engineered lectins and methods of using such reagents for both preventing and treating a broad array of viral infections are provided. The lectins of the invention are engineered in two ways, first through the enhancement of the natural mode of action of lectins against viruses through linked multimerization, and second through the creation of a new class of reagents, hereinafter referred to as a “lectibody” or “lectibodies”, that engage host immune function in addition to simply binding glycosylated viral proteins via the combination of a lectin and the Fc region of an antibody in order to drive Fc-mediated effector functions including ADCC (antibody-dependent cell-mediated cytotoxicity), increased half-life, complement-dependent cytotoxicity (CDC), and antibody-dependent cell-mediated phagocytosis (ADCP) in response to a lectin-mediated carbohydrate-binding event.

The invention relates to a method for manufacturing a digital PCR (polymerase chain reaction) chip based on a mineral-oil saturated PDMS (polydimethylsiloxane) material. The method is characterized in that the digital PCR chip based on PDMS is prepared from a PDMS monomer of a certain amount of mineral oil (liquid paraffin) and comprises an emulsion droplet generation structure and an emulsion droplet collection structure. After the emulsion droplets are made and collected on the same chip, the emulsion droplets are subjected to PCR amplification on the same chip. The phagocytosis to the oil phase in the digital PCR system by the PDMS of the chip can be avoided, the emulsion droplets can be kept stable during PCR, and the stability of the PCR can be guaranteed. In addition, compared with the existing technology of the digital PCR chip, the method provided by the invention is low in cost, is convenient to operate and has a very wide application prospect.

The present invention provides a human monoclonal antibody that has both activity of inhibiting the aggregation of pathogenic bacteria involved in periodontal diseases and activity of promoting sterilization by leukocytes, that is preferably a monoclonal antibody against 40-kDa OMP, which inhibits the binding of hemin, and that causes no concerns such as side effects. The present invention further provides an agent that acts against periodontal diseases containing the monoclonal antibody. The present invention relates to an antibody binding to 40-kDa OMP or a functional fragment thereof having at least one of (1) activity of inhibiting the coaggregation of P. gingivalis, (2) activity of promoting human neutrophilic phagocytosis, and (3) activity of inhibiting the binding of hemin to 40-kDa OMP.

The invention belongs to the field of medicine preparation and particularly relates to a docetaxel solid lipid nanoparticle and a preparation method thereof. The docetaxel solid lipid nanoparticle consists of an effective curative dose of docetaxel, solid lipid materials, liquid lipid materials, an emulsifying agent, additives, long-circulating auxiliary materials and water for injection. The docetaxel solid lipid nanoparticle provided by the invention has the characteristics of stable docetaxel structure, phagocytosis prevention of an in-vivo reticuloendothelial system and active tumor targeting, and can be stably stored.

The invention relates to a intraocular lens. At present the Poly-Methyl Methacrylate (PMMA) intraocular lens conventional for clinical treatment of cataract always causes inflammatory treaction after implantation. Posterior capsule opacification is also a major compalication after cataract surgery. The invention selects fluorouracil to solve the above problems. Based on weak penetrating force of chitosan nanoparticles in eyes and the relation between the phagocytosis amount of conjunctival epithelial cells to nanoparticles and the particle size of nanoparticles, the fluorouracil nanoparticles preparation is prepared using chitosan-poly(acrylic acid) as carrier, composite coated on the surface of PMMA intraocular lens. The invantion also provides a preparation method thereof. The said intraocular lens not only increases the biocompatibility of the intraocular lens, but also inhibites posterior capsule opacification pafter cataract surgery. The said intraocular lens can also prevent anterior membrane after implantation of intraocular lens and after-cataract.

The invention belongs to the fields of polymer chemistry and medicinal preparations, and particularly relates to a method for synthesizing an active targeted hyaluronic acid-polylactic acid carrier, a method for preparing an anti-tumor medicinal micelle of the active targeted hyaluronic acid-polylactic acid carrier and an application thereof. By adopting a novel self-assembly technology, amphipathic PEG (polyethylene glycol) block polyester copolymer and tumor targeted ligand hyaluronic acid-polylactic acid copolymer are self-assembled by means of the electrostatic interaction to form a multifunctional composite micelle; the solubility of insoluble tumor medicaments and the drug loading capacity and encapsulation efficiency of water-soluble anti-tumor medicines can be remarkably improved by virtue of the anti-cancer drug-loaded micelle and composite micelle composition, the medicines can be biodegraded in a body, phagocytosis of a reticuloendothelial system (RES) and excretion of a kidney can be avoided. The active targeted hyaluronic acid-polylactic acid carrier has a long-circulating effect, the multifunctional composition has a prominent advantage of tumor active targeting effect, and parameters of pharmacodynamics in vitro and in vivo of the micelle are remarkably superior to those of common anti-tumor injections. Clinically acceptable administration means of the micelle includes injection administration or mucosal administration, and preparations of the micelle can be injection, transfusion, injection lyophilized powder injections or dry powder inhalation.

The invention discloses an amphiphilic camptothecin polymer prodrug taking phenylboronic acid ester as a connecting unit and a co-delivery micelle system thereof. A polyethylene glycol-polyglutamate camptothecin two-block polymer (mPEG-BC-PGluCPT) is synthesized by taking catechol phenylborate (BC) as a connecting unit, and then a doxorubicin loaded micelle (mPEG-BC@PGluCPT.Dox) of the polymer isconstructed. Aiming at the poor water solubility of camptothecin, a polymer prodrug using camptothecin as a hydrophobic end by modifying 20 sites of hydroxyl groups of camptothecin is synthesized, which can effectively promote the assembly of the two-block polymer into a micelle. The solubility of camptothecin is improved, the stability of a camptothecin lactone ring is increased, and the curativeeffect and bioavailability are improved in order to overcome limitations of clinical treatment of camptothecin. The amphiphilic camptothecin polymer prodrug prepared by the method provided by the invention can be used for constructing a nano drug common delivery system, and has good drug release property, strong cell inhibition rate and good cell phagocytosis.

The invention relates to the field of protein, in particular to a bioactive peptide SKVLPVPEKAVPYPQ as well as a preparation method and an application thereof. An amino acid sequence of the bioactive peptide SKVLPVPEKAVPYPQ is Ser-Lys-Val-Leu-Pro-Val-Pro-Glu-Lys-Ala-Val-Pro-Tyr-Pro-Gln. An in-vitro anti-oxidation experiment and an in-vitro immunity function promoting experiment prove that the bioactive peptide SKVLPVPEKAVPYPQ has better anti-oxidation biological activity and immunity regulation function, on one hand, the bioactive peptide SKVLPVPEKAVPYPQ has better anti-oxidation activity, can clear free radicals in an organism and improves life quality; on the other hand, by the aid of the bioactive peptide SKVLPVPEKAVPYPQ, in-vitro proliferation capacity of lymphocytes and macrophages can be enhanced, the phagocytosis capacity of the macrophages for neutral red is improved, the organism's capacity of resisting outside pathogen infection is improved, morbidity of the organism is reduced, and therefore, the bioactive peptide SKVLPVPEKAVPYPQ has quite great significance in development of food, healthcare products and drugs with an immune regulation function and an anti-oxidation function.

The invention relates to a water-soluble molecular target porphin photosensitizer and a preparation method thereof. The photosensitizer is characterized in that the two bridged ends of polyethylene glycol (PEG) diamine are respectively connected with folic acid and porphin with substituent groups, wherein other substituent groups can be connected with the porphin, and the average molecular weight of PEG is 1000-10000. According to the preparation method of the water-soluble molecular target porphin photosensitizer, PEG diamine reacts with folic acid so as to produce PEG amine which is obtained from single folic acid, and the PEG amine has amidation with carboxyl, acyl chloride or anhydride substituent group on the porphin so as to obtain the porphin-PEG-folic acid target photosensitizer. The photosensitizer has good photodynamic activity, tumor target performance and good water solubility and is applicable to intravenous administration; the phagocytosis of macrophage to the photosensitizer can be reduced, the body circulation time of the photosensitizer is prolonged and the bioavailability of the photosensitizer is improved. Moreover, the preparation method of the water-soluble molecular target photosensitizer is simple to operate, has moderate conditions and has strong repeatability.

The present invention encompasses protective monoclonal antibodies that bind to peptidoglycan of Gram-positive bacteria. The antibodies also bind to whole bacteria and enhance phagocytosis and killing of the bacteria in vitro and block nasal colonization by Gram-positive bacteria in vivo. The invention also provides human, humanized and chimeric antibodies. The invention also sets forth the heavy chain and light chain variable regions of an antibody within the invention.

The invention discloses a targeting ginkgolide B solid lipid nanoparticle and a preparation method thereof. The ginkgolide B solid lipid nanoparticle targeting a blood brain barrier is prepared with an oil-in-water emulsion process by taking a ginkgolide B as a treating medicament, taking a solid lipid material as a carrier, taking a folic acid-modified surfactant as a targeting material and taking a mixture obtained by mixing a surfactant with the folic acid-modified surfactant in a certain ratio as an emulsifier. The particle diameter is 80-200 nanometers, and the polydispersion coefficient is 0.30+/-0.10. According to the solid lipid nanoparticle, a brain targeting effect is achieved by using the folic acid-mediated phagocytosis on the surfaces of brain cells and the phagocytosis way of adsorption of a brain cell membrane by using the nanoparticle.

The present invention discloses a method for culturing golden algea and an application thereof in controlling blooming algae, which belong to the field of water pollution control technology. The method for culturing golden algea is as follows: golden algea and microcystic aeruginosa are added into the BG11 culture medium; the golden algea lives on the microcystic aeruginosa to grow heterotrophically; after seven to ten days of culturing, the microcystic aeruginosa is gradually eaten up; the golden algea gets into the stable growing period; high-density golden algea liquid is obtained; and the golden algea liquid is centrifugated in order to harvest the golden algea. The golden algea harvested by centrifugating or the golden algea liquid is directly added into the water body, and the golden algea swallows the blooming algae, so that the overgrowth of the blooming algae can be controlled and the blooming algae can be eliminated. The method which utilizes the golden algea to swallow the blooming algae to prevent the outbreak of the blooming algae and control the growth of the blooming algae is an algae-inhibiting method which is characterized by good ecological safety, cheap materials, economy, high efficiency and easy utilization, and has the advantages of easy golden algea culturing, good algae control effect, etc.

A novel convenient method for evaluating the function of a phagocyte is provided. The method assays sCD14-ST, which is a humoral factor specifically produced in phagocytosis by the phagocyte and which is stable enough for use in an assay. Also provided is a method for detecting diseases associated with the phagocytosis by the phagocyte.

The invention aims to provide lactobacillus rhamnosus having bacteriostatic and immunity enhancement function, with the preservation number: CCTCC NO: M 2013355. The lactobacillus rhamnosus provided by the invention can be applied in the biological products which are medicines, food or health products. The lactobacillus rhamnosus has very powerful bacteriostatic ability, can obviously improve the achroacyte conversion and HCso of a mouse, phagocytosis rate and index of macrophage and NK cell activity, can enhance normal mouse immunity, and therefore can be widely applied in the medicines, food or the health products.

Tissue and other body structures may be protected using a hydrated composition made from free-flowing substantially collagen-free rehydratable polysaccharide particles and rehydratable polysaccharide sponges. Rehydration of the particles without clumping may be carried out be dispersing the particles in a biocompatible water-miscible polar dispersant such as ethanol and combining the dispersion with sufficient aqueous solvent for the particles to convert them to a cohesive hydrogel. The hydrated composition may assist in returning an injured, inflamed or surgically repaired surface to a normal state, e.g., through one or more healing mechanisms such as modulation of an inflammatory response, phagocytosis, mucosal remodeling, reciliation or other full or partial restoration of normal function.

The invention discloses a diblock polymer with benzeneboronic acid ester as the connecting unit. Benzeneboronic acid catechol ester (BC) is adopted as the connecting unit to synthesize PEG-BC-PBLG diblock polymer so as to construct doxorubicin loaded micelle (PEG-BC@PBLG.Dox). The invention also discloses a preparation method of the diblock polymer, and the method includes: (1) preparing the dopa derivative PEG-3, 4-DA of PEG-NH2; (2) subjecting PEG-3, 4-DA and 3-aminophenylboronic acid to dehydration condensation so as to synthesize the benzeneboronic acid ester derivative PEG-BC of PEG; and (3) using PEG-BC to perform ring opening on 5-benzyl ester-L-glutamic acid-N-carboxyanhydride (BLG-NCA), thus obtaining the diblock polymer PEG-BC-PBLG with benzeneboronic acid ester as the connecting unit. The diblock polymer prepared by the method provided by the invention can be used for construction of a nano-micelle, and has the advantages of good drug release, low cytotoxicity and good cell phagocytosis.

The invention provides an active targeting type amphipathic polypeptide nano-drug carrier and preparation and application thereof, and belongs to the technical field of biological medicines. According to an amphipathic polypeptide, an alkyl chain serves as the hydrophobic end, a polypeptide chain with active targeting functional and side chain modification fluorescent functional molecules serves as the hydrophilic end, and an anti-tumor drug is wrapped in a hydrophobic cavity of a micelle formed by self-assembling the amphipathic polypeptide. The nano-carrier can actively target tumor cells and enter the tumor cells through receptor-mediated endocytosis, the amphipathic polypeptide and phospholipid molecules have strong interaction, and the phagocytosis of a nano-drug by tumor cells is promoted. In the process, tracing can be conducted through fluorescent imaging of fluorescent functional molecules modified on the polypeptide chain, and the tumor imaging aim is realized. Finally, the anti-tumor drug is slowly released to kill tumor cells and restrain the growth of tumors. The amphipathic polypeptide nano-carrier is free of toxin, high in biocompatibility and remarkable in anti-tumor efficiency, and the tumor diagnosis and treatment can be integrated.

The invention relates to a DCs vaccine based on phospholipid hybrid polymersome jointly encapsulating an antigen and dual immunoagonists, a preparation method and application thereof. The phospholipidhybrid polymersome which can jointly load a model antigen OVA and two types of TLR agonists (TLR7/8 and TLR4) is used for stimulation in vitro of the DCs so as to realize the effective phagocytosis of DCs cells. The rapid and long-term immunostimulatory effect on the DCs is achieved by the internal and external co-loading of the OVA antigen. The synergistic effect of the two types of TLR agonistssignificantly enhances the immune response after antigen stimulation; the phospholipid hybrid polymersome which jointly encapsulates the antigen and the dual immunoagonists can effectively promote the activation and maturation of the DCs, increases the level of cross-presentation, promotes the migration of the DC vaccine to secondary lymphoid organs, and produces a strong specific cytotoxic T lymphocytes (CTLs) killing effect, thereby effectively killing tumor cells and realizing the immunotherapy of the DCs vaccine on tumors.

The invention discloses a medicament for treating geriatric disease, and at the medicament can be used for solving the technical problems of improving the functions of viscera, improving the immunity, invigorating qi and blood, and ensuring not to cause the body of middle-aged and aged people aiming at the geriatric disease. The technical scheme adopted by the invention is as follows: the medicament is characterized by comprising 1 to 5,000g of ants, 1 to 3,000g of glssy ganoderma, and 1 to 500g of pearl. Compared with the prior art, the unique broad-spectrum and immunity dual immunomodulatory action of ants are sufficiently played, the degraded thymus gland is promoted to proliferate, the weight is increased, the lymphocytes in the cortical area are increased, the functions of immunity center are activated, the leucocytes and lysozymes in the blood are increased, and the phagocytosis is improved. The medicament has the functions of nourishing kidney, tonifying spleen and dredging abdomen, tranquilizing by nourishing the heart and promoting blood circulation to remove meridian obstruction, so that the body is restored to a normal metabolizing state to comprehensively treat the geriatric disease. Therefore, the medicament achieves the aims of preventing and treating geriatric disease, delaying aging, improving wisdom and strengthening body, and protecting bodies of middle-aged and aged people from being hurt.

The invention belongs to the field of medicinal preparations, and relates to preparation and application of a cytomembrane biomimic lipoprotein targeted nanometer drug delivery system. An anti-obesitydrug is embedded with a reconstituted high-density lipoprotein (rHDL) in a lipoprotein family to form a drug loading core, P3 peptide is modified with a cytomembrane to form a bionic shell, a bionictargeted nanoparticle used for obesity treatment is constructed, and the nanoparticle has the following characteristics: (1) the P3 peptide modified cytomembrane bionic shell has good biocompatibilityand adipose tissue targeting, so that the conditioning and phagocytosis effects of an immunity system for the nanoparticle can be reduced, the body circulation time of the drug is prolonged, and theaccumulation of the drug in adipose tissues is increased; (2) an rHDL core drug carrier has high safety and good carrying property, a lipid soluble drug can be loaded in a core embedding manner, and the lipid soluble drug can be biologically degraded completely without causing an immune reaction; and (3) the adopted anti-obesity drug can stimulate adipose tissue angiogenesis and increase white adipose tissue browning, so that the obesity is cured through synergy of the mechanism.