36results about How to "Good tissue penetration" patented technology

The invention relates to a heptamethine indocyanine dye containing N-fatty esters or N-fatty amide side chains, a synthetic method thereof and applications thereof in tumor targeting imaging and treatment. The heptamethine indocyanine dye which possesses or individually possesses near infrared absorption, fluorography and antineoplastic activity allows present research and development ideas and treatment levels of tumor targeting treatment medicaments to be greatly improved, and has great significances to aspects of early discovery, control and the like of various tumors.

The invention discloses an application of a carbocyanine dye near infrared fluorescent compound in the preparation of a photosencitizer used for treating tumors or abnormal hyperplasia tissues, shown in formula I or II, wherein X is selected from iodine, chlorine, bromine, alkyl sulfide (OSO2-alkyl), BF4 or ClO4; R1 is selected from chlorine or bromine; R2 is selected from hydrogen, alkyl, hydroxyl group (-OH), carboxyl (-COOH), aryl, aromatic alkyl, alkyl sulfonate, alkyl carbonate and alkyl amine; and n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, l1 or 12.

The invention relates to an application of pentamer lysinephthalocyanine zinc in killing staphylococcus aureus. The pentamer lysinephthalocyanine zinc are taken as the main component for killing staphylococcus, and a phosphate buffer solution and a medical surfactant are added as auxiliary agents to prepare a drug for killing staphylococcus aureus. The drug has the advantages that the main component has a definite structure with the purity reaching more than 98 percent, and has a good water solubility; the drug can be specially combined with cell membranes of bacteria, is low in use concentration, and has small toxicity on human embryonic lung fibroblast and skin; and when the concentration of the pentamer lysinephthalocyanine zinc is greater than 5 mu M, as long as a light source with excitation wavelength of 670 nm is used to radiate for 2 minutes, more than 99.99 percent of staphylococcus aureus can be killed. Thepentamer lysinephthalocyanine zinc has a good application prospect.

The invention discloses a magnetic composite nano material and a preparation method and application thereof. The magnetic composite nano material comprises modified magnetic nano particles and a modified macromolecular layer located on the outer surfaces of the modified magnetic nano particles, wherein the modified macromolecular layer comprises macromolecules and polymers connected with the macromolecules through pH response groups, and the response pH value of the pH response groups is smaller than 6.8. The magnetic composite nano material exists in a cluster form before reaching a tumor part, and due to the large particle size, the magnetic composite nano material is not likely to be rapidly removed by kidney metabolism; after the magnetic composite nano material reaches the tumor part,an assembly (the magnetic composite nano material) is gradually dispersed under the tumor subacid condition, the magnetic composite nano material exists in the tumor part in a small-particle-size magnetic nano particle form, and therefore the penetration depth of tumor tissue is increased; and due to falling of the surface modification polymers, surface positive charges are increased, and the nano particles are more easily taken by cells. Therefore, the pH response type magnetic composite nano material cluster enhances the MRI imaging contrast effect and improves the tissue penetration.

The invention discloses a cell nucleolus imaging red fluorescent carbon dot and a preparation method and application thereof. The red fluorescent carbon dot is prepared from the following raw materials in parts by weight: 1 part of Congo red and 1-10 parts of p-phenylenediamine. The fluorescent carbon dot is prepared by taking p-phenylenediamine and Congo red as raw materials and adopting a one-step hydrothermal method, and the carbon dot prepared by the invention can realize rapid, no-clean, long-time and light-stable (anti-bleaching) imaging of cell nucleuses and nucleuses of mammalian cells, and can also be applied to living cell nucleolus fluorescence imaging of model animals (such as zebra fish and nematodes). In addition, the carbon dot also has the advantages of low preparation cost, good water dispersibility, low cytotoxicity, large Stokes shift and the like, and can replace the commercialized nucleolus fluorescent probe which is widely used at present.

The invention provides an oligopeptide capable of performing specificity conjugation with lung carcinoma cells. The oligopeptide provided by the invention is high in conjugation specificity with the lung carcinoma cells, and can be used for early-phase clinical diagnosis and evaluation and prognostic judgment of a treatment effect.

The invention provides a near-infrared quantum dot probe for the brain glioma tracing. The probe uses a carboxylated poloxamer, and a cyclic glycyl-arginyl-glycyl-aspartyl-asparaginyl-proline short peptide grafted poloxamer as materials, near-infrared quantum dots and a cysteine-alanine-glutamine-lysine tetrapeptide are encapsulated, nanomicelles are formed by the self-assembly in an aqueous solution, and a solution of the near-infrared quantum dot probe that specifically binds to integrin alpha v beta 3 overexpressed by glioma cells is formed. The near-infrared quantum dot probe has the characteristics of uniform particle size, high stability, good tumor targeting, and strong tissue penetration. The brain glioma tracing with high efficiency, targeting and specificity can be realized by combining the ultrasound-targeted micro-bubble blasting technology to reversibly open the blood-brain barrier.

The invention provides a near-infrared long-afterglow luminescent material excited by a biological window and a preparation method of the near-infrared long-afterglow luminescent material. The chemical structural formula of the near-infrared long-afterglow luminescent material is Zn1+xGa2-2xSnxO4: Cry, Yz, wherein x is larger than 0 and smaller than or equal to 0.5, y is larger than 0 and smallerthan 0.01, and z is larger than or equal to 0 and smaller than 0.01. Exciting light of the near-infrared long-afterglow luminescent material is located in a biological imaging window, and the wavelength of the exciting light is larger than 650 nm. The luminescent peak value is about 696nm, the long afterglow luminescent time is far longer than 1 hour, the afterglow intensity is high, the afterglowtime is long, and the material can be applied to the fields of photodynamic therapy, biological imaging and the like. In addition, the invention further relates to a preparation method of the near-infrared long-afterglow luminescent material excited by the biological window. The raw materials are wide in source and low in price. In the operation process, only all the compounds need to be mixed, ground and calcined, protective atmosphere is not needed, operation is easy, and the method is suitable for large-scale production.

The invention discloses a treatment device based on laser with wavelength of 940 nm. The treatment device is characterized by comprising a laser device, a cooling system and a probe handle, wherein the laser device is used for emitting the laser with the wavelength of 940 nm and is connected with the probe handle through a transmission optical fiber; the cooling system is used for providing a cooling working medium and is connected with the probe handle through a cooling working medium conveying pipeline; the laser with the wavelength of 940 nm emitted by the laser device has relatively good tissue penetrability; absorption of hemoglobin to the laser is increased, absorption of melanin and the like to the laser is reduced, treatment of vascular skin diseases such as fat and thick type port-wine stains with relatively large lesion blood vessels and face angiotelectasis with relatively small lesion blood vessels is realized, and the treatment device is relatively good in treatment effectand relatively good in universality; and meanwhile, a mode of coupling refrigerant surface spray cooling with cold air cooling is adopted, so that thermal injury to epidermis and dermis is effectively avoided.

The invention discloses a construction method and an application of an anti-PEDV (Porcine Epidemic Diarrhea Virus) N protein VHH (variable region of heavy chain) bacteriophage display library. The construction method comprises the following steps: carrying out extraction and reverse transcription of immune two-humped camel peripheral blood lymphocyte and lymphocyte total RNA (Ribonucleic Acid); designing two pairs of PCR (Polymerase Chain Reaction) amplification primers to obtain a target fragment; connecting the obtained target fragment with a phagemid carrier pCANTAB-5E; converting a connection product into a TG1 competent cell, and obtaining the bacteriophage display library; successfully constructing the VHH bacteriophage display library of the anti-PEDV N protein; calculating the capacity and the diversity of the library; and carrying out quality evaluation on the constructed library. The library established with the construction method has the characteristics of large library capacity, rich diversity and the like, and lays a foundation for establishing a clinic diagnosis method of the PEDV and researching a virus infection mechanism.

The invention provides a series of polypeptides obtained through screening with a phage display peptide library technology and having a prostate cancer targeting characteristic. The binding polypeptides have high specificity and can be applied to general survey of high risk groups of the prostate cancer, early clinical diagnosis of the prostate cancer and evaluation of a treatment effect.

The invention discloses a high-affinity early gastric cancer combined near-infrared probe and a preparation method thereof. The preparation method of the high-affinity early gastric cancer combined near-infrared probe comprises the steps: S1, firstly, constructing a polypeptide SNF and a three-dimensional structure thereof, obtaining a binding receptor EpCAM extracellular three-dimensional structure of the polypeptide SNF, and carrying out SNF modification and screening on a three-dimensional simulated SNF and EpCAM binding site to obtain a candidate optimized oligopeptide; S2, carrying out fluorescent staining and affinity comparison on the optimized polypeptide and EpCAM high-expression gastric cancer cell line SGC7901 cells; and S3, preparing a probe: linking the optimal oligopeptide screened out in the step S2 with CY5.5 through GGGSK to synthesize the near-infrared probe. A fluorescent probe capable of specifically targeting the early gastric cancer can be formed.The near-infrared probe has good characteristics of good stability, low immunogenicity, low production cost, capable of implementing rapid imaging after administration and the like.

The invention provides a nano antibody targeting glucose regulatory protein 78 and application thereof. Complementary determining regions of an amino acid sequence of the nano antibody targeting glucose regulatory protein 78 are CDR1 as shown in SEQ ID NO: 2, CDR2 as shown in SEQ ID NO: 4 and CDR3 as shown in SEQ ID NO: 6; the CDR1 is as shown in SEQ ID NO: 9, the CDR2 is as shown in SEQ ID NO: 11, and the CDR3 is as shown in SEQ ID NO: 13. The affinity of the nano antibody targeting the glucose regulatory protein 78 and the glucose regulatory protein 78 is at a nanomole level, the affinity is high, and the nano antibody has specific recognition capacity on the GRP78 protein on the surface of a cell membrane.

A method of treating a subject for reducing the risk of QT space prolongation associated with the intake of a drug known to prolong QT space includes administering to the subject at least one specific inhibitor of mitochondrial ROS production selected from among anethole trithione (ATT), 4-OH-anethole trithione (ATX), and an ATX ester, and administering to the subject the drug known to prolong QT space.

The invention provides polyamino acid for targeted delivery of a mRNA vaccine and a preparation method and application of the polyamino acid. The polyamino acid is side-chain-modified polyamino acid; a hydrophilic component and a hydrophobic component are introduced into the side chain of the polyamino acid, so polyamino acid micelles can be formed, and the micelles are used for efficiently delivering nucleic acid molecules. According to the side-chain-modified polyamino acid disclosed by the invention, a disulfide bond split in a reducing environment is introduced on the side chain, so the response of micelles to the reducing environment and a low pH value in cytoplasm can be promoted, and the mRNA vaccine is helped to actively escape from a lysosome trap and enter the cytoplasm. The active cleavage of a nanocarrier can more efficiently release mRNA compared to a passive osmotic pressure dominated escape process.

The invention discloses a CD40 targeted binding protein, which is characterized in that the amino acid sequence of the protein is shown as SEQ ID No.8, Xaa at the 30th site, the 32th site, the 33th site, the 35th site, the 43rd site, the 44th site, the 63rd site, the 65th site, the 66th site, the 68th site, the 76th site, the 77th site, the 96th site, the 98th site, the 99th site, the 101th site, the 109th site and the 110th site are respectively any amino acid. The multivalent CD40 targeted binding protein is formed by carrying out multivalent series connection on the CD40 targeted binding protein through a linker. According to the invention, the molecular weight of the antibody is only about 18kDa and is about one tenth of that of the antibody, and the antibody has good tissue penetrability, and is simple in production process and high in yield; and the CD40 specific targeted binding protein also has a good immune activation effect after being connected in series in a multivalent manner by using a proper linker.